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- Committer: Björn Påhlsson
- Date: 2008-08-04 15:50:19 UTC
- mto: (237.7.1 mandos) (24.1.154 mandos)
- mto: This revision was merged to the branch mainline in revision 42.
- Revision ID: belorn@braxen-20080804155019-uze55fh654j1f0ow
mandosclient
changed to argp
changed to argp
- files added:
- ca.pem
- files removed:
- .bzr-builddeb
- debian
- debian/po
- files renamed:
- plugin-runner.c => plugbasedclient.c
- plugins.d/mandos-client.c => plugins.d/mandosclient.c
- plugins.d/password-prompt.c => plugins.d/passprompt.c
- mandos.conf => server.conf
- 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
9
# methods "add", "remove", "server_state_changed",
10
# "entry_group_state_changed", "cleanup", and "activate" in the
11
# "AvahiService" class, and some lines in "main".
9
# following functions: "AvahiService.add", "AvahiService.remove",
10
# "server_state_changed", "entry_group_state_changed", and some lines
11
# in "main".
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12
#
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13
# 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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# Copyright © 2007-2008 Teddy Hogeborn & Björn Påhlsson
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#
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# This program is free software: you can redistribute it and/or modify
18
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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.
26
25
#
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# You should have received a copy of the GNU General Public License
28
# along with this program. If not, see
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# <http://www.gnu.org/licenses/>.
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# 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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#
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34
from __future__ import division, with_statement, absolute_import
32
from __future__ import division
35
33
36
import SocketServer as socketserver
34
import SocketServer
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import socket
38
import optparse
36
import select
37
from optparse import OptionParser
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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
45
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import gnutls.library.constants
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import gnutls.library.types
47
import ConfigParser as configparser
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import ConfigParser
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import sys
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import re
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import os
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import signal
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from sets import Set
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import subprocess
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import atexit
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import stat
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import logging
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import logging.handlers
57
import pwd
58
import contextlib
59
import struct
60
import fcntl
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import functools
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import cPickle as pickle
63
import multiprocessing
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57
65
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import dbus
66
import dbus.service
67
59
import gobject
68
60
import avahi
69
61
from dbus.mainloop.glib import DBusGMainLoop
70
62
import ctypes
71
import ctypes.util
72
import xml.dom.minidom
73
import inspect
74
75
try:
76
SO_BINDTODEVICE = socket.SO_BINDTODEVICE
77
except AttributeError:
78
try:
79
from IN import SO_BINDTODEVICE
80
except ImportError:
81
SO_BINDTODEVICE = None
82
83
84
version = "1.0.14"
85
86
#logger = logging.getLogger(u'mandos')
87
logger = logging.Logger(u'mandos')
88
syslogger = (logging.handlers.SysLogHandler
89
(facility = logging.handlers.SysLogHandler.LOG_DAEMON,
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address = "/dev/log"))
91
syslogger.setFormatter(logging.Formatter
92
(u'Mandos [%(process)d]: %(levelname)s:'
93
u' %(message)s'))
63
64
# Brief description of the operation of this program:
65
#
66
# This server announces itself as a Zeroconf service. Connecting
67
# clients use the TLS protocol, with the unusual quirk that this
68
# server program acts as a TLS "client" while a connecting client acts
69
# as a TLS "server". The client (acting as a TLS "server") must
70
# 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
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# file at start time) which binary blob to give the client. No other
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# authentication or authorization is done by this server.
74
75
76
logger = logging.Logger('mandos')
77
syslogger = logging.handlers.SysLogHandler\
78
(facility = logging.handlers.SysLogHandler.LOG_DAEMON)
79
syslogger.setFormatter(logging.Formatter\
80
('%(levelname)s: %(message)s'))
94
81
logger.addHandler(syslogger)
82
del syslogger
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83
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console = logging.StreamHandler()
97
console.setFormatter(logging.Formatter(u'%(name)s [%(process)d]:'
98
u' %(levelname)s:'
99
u' %(message)s'))
100
logger.addHandler(console)
101
84
102
85
class AvahiError(Exception):
103
def __init__(self, value, *args, **kwargs):
86
def __init__(self, value):
104
87
self.value = value
105
super(AvahiError, self).__init__(value, *args, **kwargs)
106
def __unicode__(self):
107
return unicode(repr(self.value))
88
def __str__(self):
89
return repr(self.value)
108
90
109
91
class AvahiServiceError(AvahiError):
110
92
pass
114
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115
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116
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class AvahiService(object):
117
"""An Avahi (Zeroconf) service.
118
119
Attributes:
99
"""
120
100
interface: integer; avahi.IF_UNSPEC or an interface index.
121
101
Used to optionally bind to the specified interface.
122
name: string; Example: u'Mandos'
123
type: string; Example: u'_mandos._tcp'.
124
See <http://www.dns-sd.org/ServiceTypes.html>
125
port: integer; what port to announce
126
TXT: list of strings; TXT record for the service
127
domain: string; Domain to publish on, default to .local if empty.
128
host: string; Host to publish records for, default is localhost
129
max_renames: integer; maximum number of renames
130
rename_count: integer; counter so we only rename after collisions
131
a sensible number of times
132
group: D-Bus Entry Group
133
server: D-Bus Server
134
bus: dbus.SystemBus()
102
name = string; Example: "Mandos"
103
type = string; Example: "_mandos._tcp".
104
See <http://www.dns-sd.org/ServiceTypes.html>
105
port = integer; what port to announce
106
TXT = list of strings; TXT record for the service
107
domain = string; Domain to publish on, default to .local if empty.
108
host = string; Host to publish records for, default to localhost
109
if empty.
110
max_renames = integer; maximum number of renames
111
rename_count = integer; counter so we only rename after collisions
112
a sensible number of times
135
113
"""
136
114
def __init__(self, interface = avahi.IF_UNSPEC, name = None,
137
servicetype = None, port = None, TXT = None,
138
domain = u"", host = u"", max_renames = 32768,
139
protocol = avahi.PROTO_UNSPEC, bus = None):
115
type = None, port = None, TXT = None, domain = "",
116
host = "", max_renames = 12):
117
"""An Avahi (Zeroconf) service. """
140
118
self.interface = interface
141
119
self.name = name
142
self.type = servicetype
120
self.type = type
143
121
self.port = port
144
self.TXT = TXT if TXT is not None else []
122
if TXT is None:
123
self.TXT = []
124
else:
125
self.TXT = TXT
145
126
self.domain = domain
146
127
self.host = host
147
128
self.rename_count = 0
148
self.max_renames = max_renames
149
self.protocol = protocol
150
self.group = None # our entry group
151
self.server = None
152
self.bus = bus
153
129
def rename(self):
154
130
"""Derived from the Avahi example code"""
155
131
if self.rename_count >= self.max_renames:
156
logger.critical(u"No suitable Zeroconf service name found"
157
u" after %i retries, exiting.",
158
self.rename_count)
159
raise AvahiServiceError(u"Too many renames")
160
self.name = unicode(self.server.GetAlternativeServiceName(self.name))
161
logger.info(u"Changing Zeroconf service name to %r ...",
162
self.name)
163
syslogger.setFormatter(logging.Formatter
164
(u'Mandos (%s) [%%(process)d]:'
165
u' %%(levelname)s: %%(message)s'
166
% self.name))
132
logger.critical(u"No suitable service name found after %i"
133
u" retries, exiting.", rename_count)
134
raise AvahiServiceError("Too many renames")
135
name = server.GetAlternativeServiceName(name)
136
logger.notice(u"Changing name to %r ...", name)
167
137
self.remove()
168
try:
169
self.add()
170
except dbus.exceptions.DBusException, error:
171
logger.critical(u"DBusException: %s", error)
172
self.cleanup()
173
os._exit(1)
138
self.add()
174
139
self.rename_count += 1
175
140
def remove(self):
176
141
"""Derived from the Avahi example code"""
177
if self.group is not None:
178
self.group.Reset()
142
if group is not None:
143
group.Reset()
179
144
def add(self):
180
145
"""Derived from the Avahi example code"""
181
if self.group is None:
182
self.group = dbus.Interface(
183
self.bus.get_object(avahi.DBUS_NAME,
184
self.server.EntryGroupNew()),
185
avahi.DBUS_INTERFACE_ENTRY_GROUP)
186
self.group.connect_to_signal('StateChanged',
187
self
188
.entry_group_state_changed)
189
logger.debug(u"Adding Zeroconf service '%s' of type '%s' ...",
190
self.name, self.type)
191
self.group.AddService(
192
self.interface,
193
self.protocol,
194
dbus.UInt32(0), # flags
195
self.name, self.type,
196
self.domain, self.host,
197
dbus.UInt16(self.port),
198
avahi.string_array_to_txt_array(self.TXT))
199
self.group.Commit()
200
def entry_group_state_changed(self, state, error):
201
"""Derived from the Avahi example code"""
202
logger.debug(u"Avahi entry group state change: %i", state)
203
204
if state == avahi.ENTRY_GROUP_ESTABLISHED:
205
logger.debug(u"Zeroconf service established.")
206
elif state == avahi.ENTRY_GROUP_COLLISION:
207
logger.warning(u"Zeroconf service name collision.")
208
self.rename()
209
elif state == avahi.ENTRY_GROUP_FAILURE:
210
logger.critical(u"Avahi: Error in group state changed %s",
211
unicode(error))
212
raise AvahiGroupError(u"State changed: %s"
213
% unicode(error))
214
def cleanup(self):
215
"""Derived from the Avahi example code"""
216
if self.group is not None:
217
self.group.Free()
218
self.group = None
219
def server_state_changed(self, state):
220
"""Derived from the Avahi example code"""
221
logger.debug(u"Avahi server state change: %i", state)
222
if state == avahi.SERVER_COLLISION:
223
logger.error(u"Zeroconf server name collision")
224
self.remove()
225
elif state == avahi.SERVER_RUNNING:
226
self.add()
227
def activate(self):
228
"""Derived from the Avahi example code"""
229
if self.server is None:
230
self.server = dbus.Interface(
231
self.bus.get_object(avahi.DBUS_NAME,
232
avahi.DBUS_PATH_SERVER),
233
avahi.DBUS_INTERFACE_SERVER)
234
self.server.connect_to_signal(u"StateChanged",
235
self.server_state_changed)
236
self.server_state_changed(self.server.GetState())
146
global group
147
if group is None:
148
group = dbus.Interface\
149
(bus.get_object(avahi.DBUS_NAME,
150
server.EntryGroupNew()),
151
avahi.DBUS_INTERFACE_ENTRY_GROUP)
152
group.connect_to_signal('StateChanged',
153
entry_group_state_changed)
154
logger.debug(u"Adding service '%s' of type '%s' ...",
155
service.name, service.type)
156
group.AddService(
157
self.interface, # interface
158
avahi.PROTO_INET6, # protocol
159
dbus.UInt32(0), # flags
160
self.name, self.type,
161
self.domain, self.host,
162
dbus.UInt16(self.port),
163
avahi.string_array_to_txt_array(self.TXT))
164
group.Commit()
165
166
# From the Avahi example code:
167
group = None # our entry group
168
# End of Avahi example code
237
169
238
170
239
171
class Client(object):
240
172
"""A representation of a client host served by this server.
241
242
173
Attributes:
243
_approved: bool(); 'None' if not yet approved/disapproved
244
approval_delay: datetime.timedelta(); Time to wait for approval
245
approval_duration: datetime.timedelta(); Duration of one approval
246
checker: subprocess.Popen(); a running checker process used
247
to see if the client lives.
248
'None' if no process is running.
174
name: string; from the config file, used in log messages
175
fingerprint: string (40 or 32 hexadecimal digits); used to
176
uniquely identify the client
177
secret: bytestring; sent verbatim (over TLS) to client
178
fqdn: string (FQDN); available for use by the checker command
179
created: datetime.datetime(); object creation, not client host
180
last_checked_ok: datetime.datetime() or None if not yet checked OK
181
timeout: datetime.timedelta(); How long from last_checked_ok
182
until this client is invalid
183
interval: datetime.timedelta(); How often to start a new checker
184
stop_hook: If set, called by stop() as stop_hook(self)
185
checker: subprocess.Popen(); a running checker process used
186
to see if the client lives.
187
'None' if no process is running.
188
checker_initiator_tag: a gobject event source tag, or None
189
stop_initiator_tag: - '' -
249
190
checker_callback_tag: - '' -
250
checker_command: string; External command which is run to check
251
if client lives. %() expansions are done at
191
checker_command: string; External command which is run to check if
192
client lives. %() expansions are done at
252
193
runtime with vars(self) as dict, so that for
253
194
instance %(name)s can be used in the command.
254
checker_initiator_tag: a gobject event source tag, or None
255
created: datetime.datetime(); (UTC) object creation
256
current_checker_command: string; current running checker_command
257
disable_hook: If set, called by disable() as disable_hook(self)
258
disable_initiator_tag: - '' -
259
enabled: bool()
260
fingerprint: string (40 or 32 hexadecimal digits); used to
261
uniquely identify the client
262
host: string; available for use by the checker command
263
interval: datetime.timedelta(); How often to start a new checker
264
last_checked_ok: datetime.datetime(); (UTC) or None
265
last_enabled: datetime.datetime(); (UTC)
266
name: string; from the config file, used in log messages and
267
D-Bus identifiers
268
secret: bytestring; sent verbatim (over TLS) to client
269
timeout: datetime.timedelta(); How long from last_checked_ok
270
until this client is disabled
271
runtime_expansions: Allowed attributes for runtime expansion.
195
Private attibutes:
196
_timeout: Real variable for 'timeout'
197
_interval: Real variable for 'interval'
198
_timeout_milliseconds: Used when calling gobject.timeout_add()
199
_interval_milliseconds: - '' -
272
200
"""
273
274
runtime_expansions = (u"approval_delay", u"approval_duration",
275
u"created", u"enabled", u"fingerprint",
276
u"host", u"interval", u"last_checked_ok",
277
u"last_enabled", u"name", u"timeout")
278
279
@staticmethod
280
def _timedelta_to_milliseconds(td):
281
"Convert a datetime.timedelta() to milliseconds"
282
return ((td.days * 24 * 60 * 60 * 1000)
283
+ (td.seconds * 1000)
284
+ (td.microseconds // 1000))
285
286
def timeout_milliseconds(self):
287
"Return the 'timeout' attribute in milliseconds"
288
return self._timedelta_to_milliseconds(self.timeout)
289
290
def interval_milliseconds(self):
291
"Return the 'interval' attribute in milliseconds"
292
return self._timedelta_to_milliseconds(self.interval)
293
294
def approval_delay_milliseconds(self):
295
return self._timedelta_to_milliseconds(self.approval_delay)
296
297
def __init__(self, name = None, disable_hook=None, config=None):
298
"""Note: the 'checker' key in 'config' sets the
299
'checker_command' attribute and *not* the 'checker'
300
attribute."""
201
def _set_timeout(self, timeout):
202
"Setter function for 'timeout' attribute"
203
self._timeout = timeout
204
self._timeout_milliseconds = ((self.timeout.days
205
* 24 * 60 * 60 * 1000)
206
+ (self.timeout.seconds * 1000)
207
+ (self.timeout.microseconds
208
// 1000))
209
timeout = property(lambda self: self._timeout,
210
_set_timeout)
211
del _set_timeout
212
def _set_interval(self, interval):
213
"Setter function for 'interval' attribute"
214
self._interval = interval
215
self._interval_milliseconds = ((self.interval.days
216
* 24 * 60 * 60 * 1000)
217
+ (self.interval.seconds
218
* 1000)
219
+ (self.interval.microseconds
220
// 1000))
221
interval = property(lambda self: self._interval,
222
_set_interval)
223
del _set_interval
224
def __init__(self, name=None, stop_hook=None, fingerprint=None,
225
secret=None, secfile=None, fqdn=None, timeout=None,
226
interval=-1, checker=None):
227
"""Note: the 'checker' argument sets the 'checker_command'
228
attribute and not the 'checker' attribute.."""
301
229
self.name = name
302
if config is None:
303
config = {}
304
230
logger.debug(u"Creating client %r", self.name)
305
# Uppercase and remove spaces from fingerprint for later
306
# comparison purposes with return value from the fingerprint()
307
# function
308
self.fingerprint = (config[u"fingerprint"].upper()
309
.replace(u" ", u""))
231
# Uppercase and remove spaces from fingerprint
232
# for later comparison purposes with return value of
233
# the fingerprint() function
234
self.fingerprint = fingerprint.upper().replace(u" ", u"")
310
235
logger.debug(u" Fingerprint: %s", self.fingerprint)
311
if u"secret" in config:
312
self.secret = config[u"secret"].decode(u"base64")
313
elif u"secfile" in config:
314
with open(os.path.expanduser(os.path.expandvars
315
(config[u"secfile"])),
316
"rb") as secfile:
317
self.secret = secfile.read()
236
if secret:
237
self.secret = secret.decode(u"base64")
238
elif secfile:
239
sf = open(secfile)
240
self.secret = sf.read()
241
sf.close()
318
242
else:
319
243
raise TypeError(u"No secret or secfile for client %s"
320
244
% self.name)
321
self.host = config.get(u"host", u"")
322
self.created = datetime.datetime.utcnow()
323
self.enabled = False
324
self.last_enabled = None
245
self.fqdn = fqdn
246
self.created = datetime.datetime.now()
325
247
self.last_checked_ok = None
326
self.timeout = string_to_delta(config[u"timeout"])
327
self.interval = string_to_delta(config[u"interval"])
328
self.disable_hook = disable_hook
248
self.timeout = string_to_delta(timeout)
249
self.interval = string_to_delta(interval)
250
self.stop_hook = stop_hook
329
251
self.checker = None
330
252
self.checker_initiator_tag = None
331
self.disable_initiator_tag = None
253
self.stop_initiator_tag = None
332
254
self.checker_callback_tag = None
333
self.checker_command = config[u"checker"]
334
self.current_checker_command = None
335
self.last_connect = None
336
self._approved = None
337
self.approved_by_default = config.get(u"approved_by_default",
338
True)
339
self.approvals_pending = 0
340
self.approval_delay = string_to_delta(
341
config[u"approval_delay"])
342
self.approval_duration = string_to_delta(
343
config[u"approval_duration"])
344
self.changedstate = multiprocessing_manager.Condition(multiprocessing_manager.Lock())
345
346
def send_changedstate(self):
347
self.changedstate.acquire()
348
self.changedstate.notify_all()
349
self.changedstate.release()
350
351
def enable(self):
255
self.check_command = checker
256
def start(self):
352
257
"""Start this client's checker and timeout hooks"""
353
if getattr(self, u"enabled", False):
354
# Already enabled
355
return
356
self.send_changedstate()
357
self.last_enabled = datetime.datetime.utcnow()
358
258
# Schedule a new checker to be started an 'interval' from now,
359
259
# and every interval from then on.
360
self.checker_initiator_tag = (gobject.timeout_add
361
(self.interval_milliseconds(),
362
self.start_checker))
363
# Schedule a disable() when 'timeout' has passed
364
self.disable_initiator_tag = (gobject.timeout_add
365
(self.timeout_milliseconds(),
366
self.disable))
367
self.enabled = True
260
self.checker_initiator_tag = gobject.timeout_add\
261
(self._interval_milliseconds,
262
self.start_checker)
368
263
# Also start a new checker *right now*.
369
264
self.start_checker()
370
371
def disable(self, quiet=True):
372
"""Disable this client."""
373
if not getattr(self, "enabled", False):
265
# Schedule a stop() when 'timeout' has passed
266
self.stop_initiator_tag = gobject.timeout_add\
267
(self._timeout_milliseconds,
268
self.stop)
269
def stop(self):
270
"""Stop this client.
271
The possibility that a client might be restarted is left open,
272
but not currently used."""
273
# If this client doesn't have a secret, it is already stopped.
274
if self.secret:
275
logger.debug(u"Stopping client %s", self.name)
276
self.secret = None
277
else:
374
278
return False
375
if not quiet:
376
self.send_changedstate()
377
if not quiet:
378
logger.info(u"Disabling client %s", self.name)
379
if getattr(self, u"disable_initiator_tag", False):
380
gobject.source_remove(self.disable_initiator_tag)
381
self.disable_initiator_tag = None
382
if getattr(self, u"checker_initiator_tag", False):
279
if getattr(self, "stop_initiator_tag", False):
280
gobject.source_remove(self.stop_initiator_tag)
281
self.stop_initiator_tag = None
282
if getattr(self, "checker_initiator_tag", False):
383
283
gobject.source_remove(self.checker_initiator_tag)
384
284
self.checker_initiator_tag = None
385
285
self.stop_checker()
386
if self.disable_hook:
387
self.disable_hook(self)
388
self.enabled = False
286
if self.stop_hook:
287
self.stop_hook(self)
389
288
# Do not run this again if called by a gobject.timeout_add
390
289
return False
391
392
290
def __del__(self):
393
self.disable_hook = None
394
self.disable()
395
396
def checker_callback(self, pid, condition, command):
291
self.stop_hook = None
292
self.stop()
293
def checker_callback(self, pid, condition):
397
294
"""The checker has completed, so take appropriate actions."""
295
now = datetime.datetime.now()
398
296
self.checker_callback_tag = None
399
297
self.checker = None
400
if os.WIFEXITED(condition):
401
exitstatus = os.WEXITSTATUS(condition)
402
if exitstatus == 0:
403
logger.info(u"Checker for %(name)s succeeded",
404
vars(self))
405
self.checked_ok()
406
else:
407
logger.info(u"Checker for %(name)s failed",
408
vars(self))
409
else:
298
if os.WIFEXITED(condition) \
299
and (os.WEXITSTATUS(condition) == 0):
300
logger.debug(u"Checker for %(name)s succeeded",
301
vars(self))
302
self.last_checked_ok = now
303
gobject.source_remove(self.stop_initiator_tag)
304
self.stop_initiator_tag = gobject.timeout_add\
305
(self._timeout_milliseconds,
306
self.stop)
307
elif not os.WIFEXITED(condition):
410
308
logger.warning(u"Checker for %(name)s crashed?",
411
309
vars(self))
412
413
def checked_ok(self):
414
"""Bump up the timeout for this client.
415
416
This should only be called when the client has been seen,
417
alive and well.
418
"""
419
self.last_checked_ok = datetime.datetime.utcnow()
420
gobject.source_remove(self.disable_initiator_tag)
421
self.disable_initiator_tag = (gobject.timeout_add
422
(self.timeout_milliseconds(),
423
self.disable))
424
310
else:
311
logger.debug(u"Checker for %(name)s failed",
312
vars(self))
425
313
def start_checker(self):
426
314
"""Start a new checker subprocess if one is not running.
427
428
315
If a checker already exists, leave it running and do
429
316
nothing."""
430
317
# The reason for not killing a running checker is that if we
433
320
# client would inevitably timeout, since no checker would get
434
321
# a chance to run to completion. If we instead leave running
435
322
# checkers alone, the checker would have to take more time
436
# than 'timeout' for the client to be disabled, which is as it
437
# should be.
438
439
# If a checker exists, make sure it is not a zombie
440
try:
441
pid, status = os.waitpid(self.checker.pid, os.WNOHANG)
442
except (AttributeError, OSError), error:
443
if (isinstance(error, OSError)
444
and error.errno != errno.ECHILD):
445
raise error
446
else:
447
if pid:
448
logger.warning(u"Checker was a zombie")
449
gobject.source_remove(self.checker_callback_tag)
450
self.checker_callback(pid, status,
451
self.current_checker_command)
452
# Start a new checker if needed
323
# than 'timeout' for the client to be declared invalid, which
324
# is as it should be.
453
325
if self.checker is None:
454
326
try:
455
# In case checker_command has exactly one % operator
456
command = self.checker_command % self.host
327
# In case check_command has exactly one % operator
328
command = self.check_command % self.fqdn
457
329
except TypeError:
458
330
# Escape attributes for the shell
459
escaped_attrs = dict(
460
(attr,
461
re.escape(unicode(str(getattr(self, attr, u"")),
462
errors=
463
u'replace')))
464
for attr in
465
self.runtime_expansions)
466
331
escaped_attrs = dict((key, re.escape(str(val)))
332
for key, val in
333
vars(self).iteritems())
467
334
try:
468
command = self.checker_command % escaped_attrs
335
command = self.check_command % escaped_attrs
469
336
except TypeError, error:
470
337
logger.error(u'Could not format string "%s":'
471
u' %s', self.checker_command, error)
338
u' %s', self.check_command, error)
472
339
return True # Try again later
473
self.current_checker_command = command
474
340
try:
475
logger.info(u"Starting checker %r for %s",
476
command, self.name)
477
# We don't need to redirect stdout and stderr, since
478
# in normal mode, that is already done by daemon(),
479
# and in debug mode we don't want to. (Stdin is
480
# always replaced by /dev/null.)
341
logger.debug(u"Starting checker %r for %s",
342
command, self.name)
481
343
self.checker = subprocess.Popen(command,
482
344
close_fds=True,
483
shell=True, cwd=u"/")
484
self.checker_callback_tag = (gobject.child_watch_add
485
(self.checker.pid,
486
self.checker_callback,
487
data=command))
488
# The checker may have completed before the gobject
489
# watch was added. Check for this.
490
pid, status = os.waitpid(self.checker.pid, os.WNOHANG)
491
if pid:
492
gobject.source_remove(self.checker_callback_tag)
493
self.checker_callback(pid, status, command)
494
except OSError, error:
345
shell=True, cwd="/")
346
self.checker_callback_tag = gobject.child_watch_add\
347
(self.checker.pid,
348
self.checker_callback)
349
except subprocess.OSError, error:
495
350
logger.error(u"Failed to start subprocess: %s",
496
351
error)
497
352
# Re-run this periodically if run by gobject.timeout_add
498
353
return True
499
500
354
def stop_checker(self):
501
355
"""Force the checker process, if any, to stop."""
502
356
if self.checker_callback_tag:
503
357
gobject.source_remove(self.checker_callback_tag)
504
358
self.checker_callback_tag = None
505
if getattr(self, u"checker", None) is None:
359
if getattr(self, "checker", None) is None:
506
360
return
507
logger.debug(u"Stopping checker for %(name)s", vars(self))
361
logger.debug("Stopping checker for %(name)s", vars(self))
508
362
try:
509
363
os.kill(self.checker.pid, signal.SIGTERM)
510
#time.sleep(0.5)
364
#os.sleep(0.5)
511
365
#if self.checker.poll() is None:
512
366
# os.kill(self.checker.pid, signal.SIGKILL)
513
367
except OSError, error:
514
368
if error.errno != errno.ESRCH: # No such process
515
369
raise
516
370
self.checker = None
517
518
def dbus_service_property(dbus_interface, signature=u"v",
519
access=u"readwrite", byte_arrays=False):
520
"""Decorators for marking methods of a DBusObjectWithProperties to
521
become properties on the D-Bus.
522
523
The decorated method will be called with no arguments by "Get"
524
and with one argument by "Set".
525
526
The parameters, where they are supported, are the same as
527
dbus.service.method, except there is only "signature", since the
528
type from Get() and the type sent to Set() is the same.
529
"""
530
# Encoding deeply encoded byte arrays is not supported yet by the
531
# "Set" method, so we fail early here:
532
if byte_arrays and signature != u"ay":
533
raise ValueError(u"Byte arrays not supported for non-'ay'"
534
u" signature %r" % signature)
535
def decorator(func):
536
func._dbus_is_property = True
537
func._dbus_interface = dbus_interface
538
func._dbus_signature = signature
539
func._dbus_access = access
540
func._dbus_name = func.__name__
541
if func._dbus_name.endswith(u"_dbus_property"):
542
func._dbus_name = func._dbus_name[:-14]
543
func._dbus_get_args_options = {u'byte_arrays': byte_arrays }
544
return func
545
return decorator
546
547
548
class DBusPropertyException(dbus.exceptions.DBusException):
549
"""A base class for D-Bus property-related exceptions
550
"""
551
def __unicode__(self):
552
return unicode(str(self))
553
554
555
class DBusPropertyAccessException(DBusPropertyException):
556
"""A property's access permissions disallows an operation.
557
"""
558
pass
559
560
561
class DBusPropertyNotFound(DBusPropertyException):
562
"""An attempt was made to access a non-existing property.
563
"""
564
pass
565
566
567
class DBusObjectWithProperties(dbus.service.Object):
568
"""A D-Bus object with properties.
569
570
Classes inheriting from this can use the dbus_service_property
571
decorator to expose methods as D-Bus properties. It exposes the
572
standard Get(), Set(), and GetAll() methods on the D-Bus.
573
"""
574
575
@staticmethod
576
def _is_dbus_property(obj):
577
return getattr(obj, u"_dbus_is_property", False)
578
579
def _get_all_dbus_properties(self):
580
"""Returns a generator of (name, attribute) pairs
581
"""
582
return ((prop._dbus_name, prop)
583
for name, prop in
584
inspect.getmembers(self, self._is_dbus_property))
585
586
def _get_dbus_property(self, interface_name, property_name):
587
"""Returns a bound method if one exists which is a D-Bus
588
property with the specified name and interface.
589
"""
590
for name in (property_name,
591
property_name + u"_dbus_property"):
592
prop = getattr(self, name, None)
593
if (prop is None
594
or not self._is_dbus_property(prop)
595
or prop._dbus_name != property_name
596
or (interface_name and prop._dbus_interface
597
and interface_name != prop._dbus_interface)):
598
continue
599
return prop
600
# No such property
601
raise DBusPropertyNotFound(self.dbus_object_path + u":"
602
+ interface_name + u"."
603
+ property_name)
604
605
@dbus.service.method(dbus.PROPERTIES_IFACE, in_signature=u"ss",
606
out_signature=u"v")
607
def Get(self, interface_name, property_name):
608
"""Standard D-Bus property Get() method, see D-Bus standard.
609
"""
610
prop = self._get_dbus_property(interface_name, property_name)
611
if prop._dbus_access == u"write":
612
raise DBusPropertyAccessException(property_name)
613
value = prop()
614
if not hasattr(value, u"variant_level"):
615
return value
616
return type(value)(value, variant_level=value.variant_level+1)
617
618
@dbus.service.method(dbus.PROPERTIES_IFACE, in_signature=u"ssv")
619
def Set(self, interface_name, property_name, value):
620
"""Standard D-Bus property Set() method, see D-Bus standard.
621
"""
622
prop = self._get_dbus_property(interface_name, property_name)
623
if prop._dbus_access == u"read":
624
raise DBusPropertyAccessException(property_name)
625
if prop._dbus_get_args_options[u"byte_arrays"]:
626
# The byte_arrays option is not supported yet on
627
# signatures other than "ay".
628
if prop._dbus_signature != u"ay":
629
raise ValueError
630
value = dbus.ByteArray(''.join(unichr(byte)
631
for byte in value))
632
prop(value)
633
634
@dbus.service.method(dbus.PROPERTIES_IFACE, in_signature=u"s",
635
out_signature=u"a{sv}")
636
def GetAll(self, interface_name):
637
"""Standard D-Bus property GetAll() method, see D-Bus
638
standard.
639
640
Note: Will not include properties with access="write".
641
"""
642
all = {}
643
for name, prop in self._get_all_dbus_properties():
644
if (interface_name
645
and interface_name != prop._dbus_interface):
646
# Interface non-empty but did not match
647
continue
648
# Ignore write-only properties
649
if prop._dbus_access == u"write":
650
continue
651
value = prop()
652
if not hasattr(value, u"variant_level"):
653
all[name] = value
654
continue
655
all[name] = type(value)(value, variant_level=
656
value.variant_level+1)
657
return dbus.Dictionary(all, signature=u"sv")
658
659
@dbus.service.method(dbus.INTROSPECTABLE_IFACE,
660
out_signature=u"s",
661
path_keyword='object_path',
662
connection_keyword='connection')
663
def Introspect(self, object_path, connection):
664
"""Standard D-Bus method, overloaded to insert property tags.
665
"""
666
xmlstring = dbus.service.Object.Introspect(self, object_path,
667
connection)
668
try:
669
document = xml.dom.minidom.parseString(xmlstring)
670
def make_tag(document, name, prop):
671
e = document.createElement(u"property")
672
e.setAttribute(u"name", name)
673
e.setAttribute(u"type", prop._dbus_signature)
674
e.setAttribute(u"access", prop._dbus_access)
675
return e
676
for if_tag in document.getElementsByTagName(u"interface"):
677
for tag in (make_tag(document, name, prop)
678
for name, prop
679
in self._get_all_dbus_properties()
680
if prop._dbus_interface
681
== if_tag.getAttribute(u"name")):
682
if_tag.appendChild(tag)
683
# Add the names to the return values for the
684
# "org.freedesktop.DBus.Properties" methods
685
if (if_tag.getAttribute(u"name")
686
== u"org.freedesktop.DBus.Properties"):
687
for cn in if_tag.getElementsByTagName(u"method"):
688
if cn.getAttribute(u"name") == u"Get":
689
for arg in cn.getElementsByTagName(u"arg"):
690
if (arg.getAttribute(u"direction")
691
== u"out"):
692
arg.setAttribute(u"name", u"value")
693
elif cn.getAttribute(u"name") == u"GetAll":
694
for arg in cn.getElementsByTagName(u"arg"):
695
if (arg.getAttribute(u"direction")
696
== u"out"):
697
arg.setAttribute(u"name", u"props")
698
xmlstring = document.toxml(u"utf-8")
699
document.unlink()
700
except (AttributeError, xml.dom.DOMException,
701
xml.parsers.expat.ExpatError), error:
702
logger.error(u"Failed to override Introspection method",
703
error)
704
return xmlstring
705
706
707
class ClientDBus(Client, DBusObjectWithProperties):
708
"""A Client class using D-Bus
709
710
Attributes:
711
dbus_object_path: dbus.ObjectPath
712
bus: dbus.SystemBus()
713
"""
714
715
runtime_expansions = (Client.runtime_expansions
716
+ (u"dbus_object_path",))
717
718
# dbus.service.Object doesn't use super(), so we can't either.
719
720
def __init__(self, bus = None, *args, **kwargs):
721
self._approvals_pending = 0
722
self.bus = bus
723
Client.__init__(self, *args, **kwargs)
724
# Only now, when this client is initialized, can it show up on
725
# the D-Bus
726
self.dbus_object_path = (dbus.ObjectPath
727
(u"/clients/"
728
+ self.name.replace(u".", u"_")))
729
DBusObjectWithProperties.__init__(self, self.bus,
730
self.dbus_object_path)
731
732
def _get_approvals_pending(self):
733
return self._approvals_pending
734
def _set_approvals_pending(self, value):
735
old_value = self._approvals_pending
736
self._approvals_pending = value
737
bval = bool(value)
738
if (hasattr(self, "dbus_object_path")
739
and bval is not bool(old_value)):
740
dbus_bool = dbus.Boolean(bval, variant_level=1)
741
self.PropertyChanged(dbus.String(u"ApprovalPending"),
742
dbus_bool)
743
744
approvals_pending = property(_get_approvals_pending,
745
_set_approvals_pending)
746
del _get_approvals_pending, _set_approvals_pending
747
748
@staticmethod
749
def _datetime_to_dbus(dt, variant_level=0):
750
"""Convert a UTC datetime.datetime() to a D-Bus type."""
751
return dbus.String(dt.isoformat(),
752
variant_level=variant_level)
753
754
def enable(self):
755
oldstate = getattr(self, u"enabled", False)
756
r = Client.enable(self)
757
if oldstate != self.enabled:
758
# Emit D-Bus signals
759
self.PropertyChanged(dbus.String(u"Enabled"),
760
dbus.Boolean(True, variant_level=1))
761
self.PropertyChanged(
762
dbus.String(u"LastEnabled"),
763
self._datetime_to_dbus(self.last_enabled,
764
variant_level=1))
765
return r
766
767
def disable(self, quiet = False):
768
oldstate = getattr(self, u"enabled", False)
769
r = Client.disable(self, quiet=quiet)
770
if not quiet and oldstate != self.enabled:
771
# Emit D-Bus signal
772
self.PropertyChanged(dbus.String(u"Enabled"),
773
dbus.Boolean(False, variant_level=1))
774
return r
775
776
def __del__(self, *args, **kwargs):
777
try:
778
self.remove_from_connection()
779
except LookupError:
780
pass
781
if hasattr(DBusObjectWithProperties, u"__del__"):
782
DBusObjectWithProperties.__del__(self, *args, **kwargs)
783
Client.__del__(self, *args, **kwargs)
784
785
def checker_callback(self, pid, condition, command,
786
*args, **kwargs):
787
self.checker_callback_tag = None
788
self.checker = None
789
# Emit D-Bus signal
790
self.PropertyChanged(dbus.String(u"CheckerRunning"),
791
dbus.Boolean(False, variant_level=1))
792
if os.WIFEXITED(condition):
793
exitstatus = os.WEXITSTATUS(condition)
794
# Emit D-Bus signal
795
self.CheckerCompleted(dbus.Int16(exitstatus),
796
dbus.Int64(condition),
797
dbus.String(command))
798
else:
799
# Emit D-Bus signal
800
self.CheckerCompleted(dbus.Int16(-1),
801
dbus.Int64(condition),
802
dbus.String(command))
803
804
return Client.checker_callback(self, pid, condition, command,
805
*args, **kwargs)
806
807
def checked_ok(self, *args, **kwargs):
808
r = Client.checked_ok(self, *args, **kwargs)
809
# Emit D-Bus signal
810
self.PropertyChanged(
811
dbus.String(u"LastCheckedOK"),
812
(self._datetime_to_dbus(self.last_checked_ok,
813
variant_level=1)))
814
return r
815
816
def start_checker(self, *args, **kwargs):
817
old_checker = self.checker
818
if self.checker is not None:
819
old_checker_pid = self.checker.pid
820
else:
821
old_checker_pid = None
822
r = Client.start_checker(self, *args, **kwargs)
823
# Only if new checker process was started
824
if (self.checker is not None
825
and old_checker_pid != self.checker.pid):
826
# Emit D-Bus signal
827
self.CheckerStarted(self.current_checker_command)
828
self.PropertyChanged(
829
dbus.String(u"CheckerRunning"),
830
dbus.Boolean(True, variant_level=1))
831
return r
832
833
def stop_checker(self, *args, **kwargs):
834
old_checker = getattr(self, u"checker", None)
835
r = Client.stop_checker(self, *args, **kwargs)
836
if (old_checker is not None
837
and getattr(self, u"checker", None) is None):
838
self.PropertyChanged(dbus.String(u"CheckerRunning"),
839
dbus.Boolean(False, variant_level=1))
840
return r
841
842
def _reset_approved(self):
843
self._approved = None
844
return False
845
846
def approve(self, value=True):
847
self.send_changedstate()
848
self._approved = value
849
gobject.timeout_add(self._timedelta_to_milliseconds
850
(self.approval_duration),
851
self._reset_approved)
852
853
854
## D-Bus methods, signals & properties
855
_interface = u"se.bsnet.fukt.Mandos.Client"
856
857
## Signals
858
859
# CheckerCompleted - signal
860
@dbus.service.signal(_interface, signature=u"nxs")
861
def CheckerCompleted(self, exitcode, waitstatus, command):
862
"D-Bus signal"
863
pass
864
865
# CheckerStarted - signal
866
@dbus.service.signal(_interface, signature=u"s")
867
def CheckerStarted(self, command):
868
"D-Bus signal"
869
pass
870
871
# PropertyChanged - signal
872
@dbus.service.signal(_interface, signature=u"sv")
873
def PropertyChanged(self, property, value):
874
"D-Bus signal"
875
pass
876
877
# GotSecret - signal
878
@dbus.service.signal(_interface)
879
def GotSecret(self):
880
"""D-Bus signal
881
Is sent after a successful transfer of secret from the Mandos
882
server to mandos-client
883
"""
884
pass
885
886
# Rejected - signal
887
@dbus.service.signal(_interface, signature=u"s")
888
def Rejected(self, reason):
889
"D-Bus signal"
890
pass
891
892
# NeedApproval - signal
893
@dbus.service.signal(_interface, signature=u"tb")
894
def NeedApproval(self, timeout, default):
895
"D-Bus signal"
896
pass
897
898
## Methods
899
900
# Approve - method
901
@dbus.service.method(_interface, in_signature=u"b")
902
def Approve(self, value):
903
self.approve(value)
904
905
# CheckedOK - method
906
@dbus.service.method(_interface)
907
def CheckedOK(self):
908
return self.checked_ok()
909
910
# Enable - method
911
@dbus.service.method(_interface)
912
def Enable(self):
913
"D-Bus method"
914
self.enable()
915
916
# StartChecker - method
917
@dbus.service.method(_interface)
918
def StartChecker(self):
919
"D-Bus method"
920
self.start_checker()
921
922
# Disable - method
923
@dbus.service.method(_interface)
924
def Disable(self):
925
"D-Bus method"
926
self.disable()
927
928
# StopChecker - method
929
@dbus.service.method(_interface)
930
def StopChecker(self):
931
self.stop_checker()
932
933
## Properties
934
935
# ApprovalPending - property
936
@dbus_service_property(_interface, signature=u"b", access=u"read")
937
def ApprovalPending_dbus_property(self):
938
return dbus.Boolean(bool(self.approvals_pending))
939
940
# ApprovedByDefault - property
941
@dbus_service_property(_interface, signature=u"b",
942
access=u"readwrite")
943
def ApprovedByDefault_dbus_property(self, value=None):
944
if value is None: # get
945
return dbus.Boolean(self.approved_by_default)
946
self.approved_by_default = bool(value)
947
# Emit D-Bus signal
948
self.PropertyChanged(dbus.String(u"ApprovedByDefault"),
949
dbus.Boolean(value, variant_level=1))
950
951
# ApprovalDelay - property
952
@dbus_service_property(_interface, signature=u"t",
953
access=u"readwrite")
954
def ApprovalDelay_dbus_property(self, value=None):
955
if value is None: # get
956
return dbus.UInt64(self.approval_delay_milliseconds())
957
self.approval_delay = datetime.timedelta(0, 0, 0, value)
958
# Emit D-Bus signal
959
self.PropertyChanged(dbus.String(u"ApprovalDelay"),
960
dbus.UInt64(value, variant_level=1))
961
962
# ApprovalDuration - property
963
@dbus_service_property(_interface, signature=u"t",
964
access=u"readwrite")
965
def ApprovalDuration_dbus_property(self, value=None):
966
if value is None: # get
967
return dbus.UInt64(self._timedelta_to_milliseconds(
968
self.approval_duration))
969
self.approval_duration = datetime.timedelta(0, 0, 0, value)
970
# Emit D-Bus signal
971
self.PropertyChanged(dbus.String(u"ApprovalDuration"),
972
dbus.UInt64(value, variant_level=1))
973
974
# Name - property
975
@dbus_service_property(_interface, signature=u"s", access=u"read")
976
def Name_dbus_property(self):
977
return dbus.String(self.name)
978
979
# Fingerprint - property
980
@dbus_service_property(_interface, signature=u"s", access=u"read")
981
def Fingerprint_dbus_property(self):
982
return dbus.String(self.fingerprint)
983
984
# Host - property
985
@dbus_service_property(_interface, signature=u"s",
986
access=u"readwrite")
987
def Host_dbus_property(self, value=None):
988
if value is None: # get
989
return dbus.String(self.host)
990
self.host = value
991
# Emit D-Bus signal
992
self.PropertyChanged(dbus.String(u"Host"),
993
dbus.String(value, variant_level=1))
994
995
# Created - property
996
@dbus_service_property(_interface, signature=u"s", access=u"read")
997
def Created_dbus_property(self):
998
return dbus.String(self._datetime_to_dbus(self.created))
999
1000
# LastEnabled - property
1001
@dbus_service_property(_interface, signature=u"s", access=u"read")
1002
def LastEnabled_dbus_property(self):
1003
if self.last_enabled is None:
1004
return dbus.String(u"")
1005
return dbus.String(self._datetime_to_dbus(self.last_enabled))
1006
1007
# Enabled - property
1008
@dbus_service_property(_interface, signature=u"b",
1009
access=u"readwrite")
1010
def Enabled_dbus_property(self, value=None):
1011
if value is None: # get
1012
return dbus.Boolean(self.enabled)
1013
if value:
1014
self.enable()
1015
else:
1016
self.disable()
1017
1018
# LastCheckedOK - property
1019
@dbus_service_property(_interface, signature=u"s",
1020
access=u"readwrite")
1021
def LastCheckedOK_dbus_property(self, value=None):
1022
if value is not None:
1023
self.checked_ok()
1024
return
371
def still_valid(self):
372
"""Has the timeout not yet passed for this client?"""
373
now = datetime.datetime.now()
1025
374
if self.last_checked_ok is None:
1026
return dbus.String(u"")
1027
return dbus.String(self._datetime_to_dbus(self
1028
.last_checked_ok))
1029
1030
# Timeout - property
1031
@dbus_service_property(_interface, signature=u"t",
1032
access=u"readwrite")
1033
def Timeout_dbus_property(self, value=None):
1034
if value is None: # get
1035
return dbus.UInt64(self.timeout_milliseconds())
1036
self.timeout = datetime.timedelta(0, 0, 0, value)
1037
# Emit D-Bus signal
1038
self.PropertyChanged(dbus.String(u"Timeout"),
1039
dbus.UInt64(value, variant_level=1))
1040
if getattr(self, u"disable_initiator_tag", None) is None:
1041
return
1042
# Reschedule timeout
1043
gobject.source_remove(self.disable_initiator_tag)
1044
self.disable_initiator_tag = None
1045
time_to_die = (self.
1046
_timedelta_to_milliseconds((self
1047
.last_checked_ok
1048
+ self.timeout)
1049
- datetime.datetime
1050
.utcnow()))
1051
if time_to_die <= 0:
1052
# The timeout has passed
1053
self.disable()
1054
else:
1055
self.disable_initiator_tag = (gobject.timeout_add
1056
(time_to_die, self.disable))
1057
1058
# Interval - property
1059
@dbus_service_property(_interface, signature=u"t",
1060
access=u"readwrite")
1061
def Interval_dbus_property(self, value=None):
1062
if value is None: # get
1063
return dbus.UInt64(self.interval_milliseconds())
1064
self.interval = datetime.timedelta(0, 0, 0, value)
1065
# Emit D-Bus signal
1066
self.PropertyChanged(dbus.String(u"Interval"),
1067
dbus.UInt64(value, variant_level=1))
1068
if getattr(self, u"checker_initiator_tag", None) is None:
1069
return
1070
# Reschedule checker run
1071
gobject.source_remove(self.checker_initiator_tag)
1072
self.checker_initiator_tag = (gobject.timeout_add
1073
(value, self.start_checker))
1074
self.start_checker() # Start one now, too
1075
1076
# Checker - property
1077
@dbus_service_property(_interface, signature=u"s",
1078
access=u"readwrite")
1079
def Checker_dbus_property(self, value=None):
1080
if value is None: # get
1081
return dbus.String(self.checker_command)
1082
self.checker_command = value
1083
# Emit D-Bus signal
1084
self.PropertyChanged(dbus.String(u"Checker"),
1085
dbus.String(self.checker_command,
1086
variant_level=1))
1087
1088
# CheckerRunning - property
1089
@dbus_service_property(_interface, signature=u"b",
1090
access=u"readwrite")
1091
def CheckerRunning_dbus_property(self, value=None):
1092
if value is None: # get
1093
return dbus.Boolean(self.checker is not None)
1094
if value:
1095
self.start_checker()
1096
else:
1097
self.stop_checker()
1098
1099
# ObjectPath - property
1100
@dbus_service_property(_interface, signature=u"o", access=u"read")
1101
def ObjectPath_dbus_property(self):
1102
return self.dbus_object_path # is already a dbus.ObjectPath
1103
1104
# Secret = property
1105
@dbus_service_property(_interface, signature=u"ay",
1106
access=u"write", byte_arrays=True)
1107
def Secret_dbus_property(self, value):
1108
self.secret = str(value)
1109
1110
del _interface
1111
1112
1113
class ProxyClient(object):
1114
def __init__(self, child_pipe, fpr, address):
1115
self._pipe = child_pipe
1116
self._pipe.send(('init', fpr, address))
1117
if not self._pipe.recv():
1118
raise KeyError()
1119
1120
def __getattribute__(self, name):
1121
if(name == '_pipe'):
1122
return super(ProxyClient, self).__getattribute__(name)
1123
self._pipe.send(('getattr', name))
1124
data = self._pipe.recv()
1125
if data[0] == 'data':
1126
return data[1]
1127
if data[0] == 'function':
1128
def func(*args, **kwargs):
1129
self._pipe.send(('funcall', name, args, kwargs))
1130
return self._pipe.recv()[1]
1131
return func
1132
1133
def __setattr__(self, name, value):
1134
if(name == '_pipe'):
1135
return super(ProxyClient, self).__setattr__(name, value)
1136
self._pipe.send(('setattr', name, value))
1137
1138
1139
class ClientHandler(socketserver.BaseRequestHandler, object):
1140
"""A class to handle client connections.
1141
1142
Instantiated once for each connection to handle it.
375
return now < (self.created + self.timeout)
376
else:
377
return now < (self.last_checked_ok + self.timeout)
378
379
380
def peer_certificate(session):
381
"Return the peer's OpenPGP certificate as a bytestring"
382
# If not an OpenPGP certificate...
383
if gnutls.library.functions.gnutls_certificate_type_get\
384
(session._c_object) \
385
!= gnutls.library.constants.GNUTLS_CRT_OPENPGP:
386
# ...do the normal thing
387
return session.peer_certificate
388
list_size = ctypes.c_uint()
389
cert_list = gnutls.library.functions.gnutls_certificate_get_peers\
390
(session._c_object, ctypes.byref(list_size))
391
if list_size.value == 0:
392
return None
393
cert = cert_list[0]
394
return ctypes.string_at(cert.data, cert.size)
395
396
397
def fingerprint(openpgp):
398
"Convert an OpenPGP bytestring to a hexdigit fingerprint string"
399
# New empty GnuTLS certificate
400
crt = gnutls.library.types.gnutls_openpgp_crt_t()
401
gnutls.library.functions.gnutls_openpgp_crt_init\
402
(ctypes.byref(crt))
403
# New GnuTLS "datum" with the OpenPGP public key
404
datum = gnutls.library.types.gnutls_datum_t\
405
(ctypes.cast(ctypes.c_char_p(openpgp),
406
ctypes.POINTER(ctypes.c_ubyte)),
407
ctypes.c_uint(len(openpgp)))
408
# Import the OpenPGP public key into the certificate
409
ret = gnutls.library.functions.gnutls_openpgp_crt_import\
410
(crt,
411
ctypes.byref(datum),
412
gnutls.library.constants.GNUTLS_OPENPGP_FMT_RAW)
413
# New buffer for the fingerprint
414
buffer = ctypes.create_string_buffer(20)
415
buffer_length = ctypes.c_size_t()
416
# Get the fingerprint from the certificate into the buffer
417
gnutls.library.functions.gnutls_openpgp_crt_get_fingerprint\
418
(crt, ctypes.byref(buffer), ctypes.byref(buffer_length))
419
# Deinit the certificate
420
gnutls.library.functions.gnutls_openpgp_crt_deinit(crt)
421
# Convert the buffer to a Python bytestring
422
fpr = ctypes.string_at(buffer, buffer_length.value)
423
# Convert the bytestring to hexadecimal notation
424
hex_fpr = u''.join(u"%02X" % ord(char) for char in fpr)
425
return hex_fpr
426
427
428
class tcp_handler(SocketServer.BaseRequestHandler, object):
429
"""A TCP request handler class.
430
Instantiated by IPv6_TCPServer for each request to handle it.
1143
431
Note: This will run in its own forked process."""
1144
432
1145
433
def handle(self):
1146
with contextlib.closing(self.server.child_pipe) as child_pipe:
1147
logger.info(u"TCP connection from: %s",
1148
unicode(self.client_address))
1149
logger.debug(u"Pipe FD: %d",
1150
self.server.child_pipe.fileno())
1151
1152
session = (gnutls.connection
1153
.ClientSession(self.request,
1154
gnutls.connection
1155
.X509Credentials()))
1156
1157
# Note: gnutls.connection.X509Credentials is really a
1158
# generic GnuTLS certificate credentials object so long as
1159
# no X.509 keys are added to it. Therefore, we can use it
1160
# here despite using OpenPGP certificates.
1161
1162
#priority = u':'.join((u"NONE", u"+VERS-TLS1.1",
1163
# u"+AES-256-CBC", u"+SHA1",
1164
# u"+COMP-NULL", u"+CTYPE-OPENPGP",
1165
# u"+DHE-DSS"))
1166
# Use a fallback default, since this MUST be set.
1167
priority = self.server.gnutls_priority
1168
if priority is None:
1169
priority = u"NORMAL"
1170
(gnutls.library.functions
1171
.gnutls_priority_set_direct(session._c_object,
1172
priority, None))
1173
1174
# Start communication using the Mandos protocol
1175
# Get protocol number
1176
line = self.request.makefile().readline()
1177
logger.debug(u"Protocol version: %r", line)
1178
try:
1179
if int(line.strip().split()[0]) > 1:
1180
raise RuntimeError
1181
except (ValueError, IndexError, RuntimeError), error:
1182
logger.error(u"Unknown protocol version: %s", error)
1183
return
1184
1185
# Start GnuTLS connection
1186
try:
1187
session.handshake()
1188
except gnutls.errors.GNUTLSError, error:
1189
logger.warning(u"Handshake failed: %s", error)
1190
# Do not run session.bye() here: the session is not
1191
# established. Just abandon the request.
1192
return
1193
logger.debug(u"Handshake succeeded")
1194
1195
approval_required = False
1196
try:
1197
try:
1198
fpr = self.fingerprint(self.peer_certificate
1199
(session))
1200
except (TypeError, gnutls.errors.GNUTLSError), error:
1201
logger.warning(u"Bad certificate: %s", error)
1202
return
1203
logger.debug(u"Fingerprint: %s", fpr)
1204
1205
try:
1206
client = ProxyClient(child_pipe, fpr,
1207
self.client_address)
1208
except KeyError:
1209
return
1210
1211
if client.approval_delay:
1212
delay = client.approval_delay
1213
client.approvals_pending += 1
1214
approval_required = True
1215
1216
while True:
1217
if not client.enabled:
1218
logger.warning(u"Client %s is disabled",
1219
client.name)
1220
if self.server.use_dbus:
1221
# Emit D-Bus signal
1222
client.Rejected("Disabled")
1223
return
1224
1225
if client._approved or not client.approval_delay:
1226
#We are approved or approval is disabled
1227
break
1228
elif client._approved is None:
1229
logger.info(u"Client %s needs approval",
1230
client.name)
1231
if self.server.use_dbus:
1232
# Emit D-Bus signal
1233
client.NeedApproval(
1234
client.approval_delay_milliseconds(),
1235
client.approved_by_default)
1236
else:
1237
logger.warning(u"Client %s was not approved",
1238
client.name)
1239
if self.server.use_dbus:
1240
# Emit D-Bus signal
1241
client.Rejected("Denied")
1242
return
1243
1244
#wait until timeout or approved
1245
#x = float(client._timedelta_to_milliseconds(delay))
1246
time = datetime.datetime.now()
1247
client.changedstate.acquire()
1248
client.changedstate.wait(float(client._timedelta_to_milliseconds(delay) / 1000))
1249
client.changedstate.release()
1250
time2 = datetime.datetime.now()
1251
if (time2 - time) >= delay:
1252
if not client.approved_by_default:
1253
logger.warning("Client %s timed out while"
1254
" waiting for approval",
1255
client.name)
1256
if self.server.use_dbus:
1257
# Emit D-Bus signal
1258
client.Rejected("Approval timed out")
1259
return
1260
else:
1261
break
1262
else:
1263
delay -= time2 - time
1264
1265
sent_size = 0
1266
while sent_size < len(client.secret):
1267
try:
1268
sent = session.send(client.secret[sent_size:])
1269
except (gnutls.errors.GNUTLSError), error:
1270
logger.warning("gnutls send failed")
1271
return
1272
logger.debug(u"Sent: %d, remaining: %d",
1273
sent, len(client.secret)
1274
- (sent_size + sent))
1275
sent_size += sent
1276
1277
logger.info(u"Sending secret to %s", client.name)
1278
# bump the timeout as if seen
1279
client.checked_ok()
1280
if self.server.use_dbus:
1281
# Emit D-Bus signal
1282
client.GotSecret()
1283
1284
finally:
1285
if approval_required:
1286
client.approvals_pending -= 1
1287
try:
1288
session.bye()
1289
except (gnutls.errors.GNUTLSError), error:
1290
logger.warning("GnuTLS bye failed")
1291
1292
@staticmethod
1293
def peer_certificate(session):
1294
"Return the peer's OpenPGP certificate as a bytestring"
1295
# If not an OpenPGP certificate...
1296
if (gnutls.library.functions
1297
.gnutls_certificate_type_get(session._c_object)
1298
!= gnutls.library.constants.GNUTLS_CRT_OPENPGP):
1299
# ...do the normal thing
1300
return session.peer_certificate
1301
list_size = ctypes.c_uint(1)
1302
cert_list = (gnutls.library.functions
1303
.gnutls_certificate_get_peers
1304
(session._c_object, ctypes.byref(list_size)))
1305
if not bool(cert_list) and list_size.value != 0:
1306
raise gnutls.errors.GNUTLSError(u"error getting peer"
1307
u" certificate")
1308
if list_size.value == 0:
1309
return None
1310
cert = cert_list[0]
1311
return ctypes.string_at(cert.data, cert.size)
1312
1313
@staticmethod
1314
def fingerprint(openpgp):
1315
"Convert an OpenPGP bytestring to a hexdigit fingerprint"
1316
# New GnuTLS "datum" with the OpenPGP public key
1317
datum = (gnutls.library.types
1318
.gnutls_datum_t(ctypes.cast(ctypes.c_char_p(openpgp),
1319
ctypes.POINTER
1320
(ctypes.c_ubyte)),
1321
ctypes.c_uint(len(openpgp))))
1322
# New empty GnuTLS certificate
1323
crt = gnutls.library.types.gnutls_openpgp_crt_t()
1324
(gnutls.library.functions
1325
.gnutls_openpgp_crt_init(ctypes.byref(crt)))
1326
# Import the OpenPGP public key into the certificate
1327
(gnutls.library.functions
1328
.gnutls_openpgp_crt_import(crt, ctypes.byref(datum),
1329
gnutls.library.constants
1330
.GNUTLS_OPENPGP_FMT_RAW))
1331
# Verify the self signature in the key
1332
crtverify = ctypes.c_uint()
1333
(gnutls.library.functions
1334
.gnutls_openpgp_crt_verify_self(crt, 0,
1335
ctypes.byref(crtverify)))
1336
if crtverify.value != 0:
1337
gnutls.library.functions.gnutls_openpgp_crt_deinit(crt)
1338
raise (gnutls.errors.CertificateSecurityError
1339
(u"Verify failed"))
1340
# New buffer for the fingerprint
1341
buf = ctypes.create_string_buffer(20)
1342
buf_len = ctypes.c_size_t()
1343
# Get the fingerprint from the certificate into the buffer
1344
(gnutls.library.functions
1345
.gnutls_openpgp_crt_get_fingerprint(crt, ctypes.byref(buf),
1346
ctypes.byref(buf_len)))
1347
# Deinit the certificate
1348
gnutls.library.functions.gnutls_openpgp_crt_deinit(crt)
1349
# Convert the buffer to a Python bytestring
1350
fpr = ctypes.string_at(buf, buf_len.value)
1351
# Convert the bytestring to hexadecimal notation
1352
hex_fpr = u''.join(u"%02X" % ord(char) for char in fpr)
1353
return hex_fpr
1354
1355
1356
class MultiprocessingMixIn(object):
1357
"""Like socketserver.ThreadingMixIn, but with multiprocessing"""
1358
def sub_process_main(self, request, address):
1359
try:
1360
self.finish_request(request, address)
1361
except:
1362
self.handle_error(request, address)
1363
self.close_request(request)
1364
1365
def process_request(self, request, address):
1366
"""Start a new process to process the request."""
1367
multiprocessing.Process(target = self.sub_process_main,
1368
args = (request, address)).start()
1369
1370
class MultiprocessingMixInWithPipe(MultiprocessingMixIn, object):
1371
""" adds a pipe to the MixIn """
1372
def process_request(self, request, client_address):
1373
"""Overrides and wraps the original process_request().
1374
1375
This function creates a new pipe in self.pipe
1376
"""
1377
parent_pipe, self.child_pipe = multiprocessing.Pipe()
1378
1379
super(MultiprocessingMixInWithPipe,
1380
self).process_request(request, client_address)
1381
self.child_pipe.close()
1382
self.add_pipe(parent_pipe)
1383
1384
def add_pipe(self, parent_pipe):
1385
"""Dummy function; override as necessary"""
1386
pass
1387
1388
class IPv6_TCPServer(MultiprocessingMixInWithPipe,
1389
socketserver.TCPServer, object):
1390
"""IPv6-capable TCP server. Accepts 'None' as address and/or port
1391
434
logger.debug(u"TCP connection from: %s",
435
unicode(self.client_address))
436
437
line = self.request.makefile().readline()
438
logger.debug(u"Protocol version: %r", line)
439
try:
440
if int(line.strip().split()[0]) > 1:
441
raise RuntimeError
442
except (ValueError, IndexError, RuntimeError), error:
443
logger.error(u"Unknown protocol version: %s", error)
444
return
445
446
session = gnutls.connection.ClientSession\
447
(self.request, gnutls.connection.X509Credentials())
448
# Note: gnutls.connection.X509Credentials is really a generic
449
# GnuTLS certificate credentials object so long as no X.509
450
# keys are added to it. Therefore, we can use it here despite
451
# using OpenPGP certificates.
452
453
#priority = ':'.join(("NONE", "+VERS-TLS1.1", "+AES-256-CBC",
454
# "+SHA1", "+COMP-NULL", "+CTYPE-OPENPGP",
455
# "+DHE-DSS"))
456
priority = "NORMAL" # Fallback default, since this
457
# MUST be set.
458
if self.server.settings["priority"]:
459
priority = self.server.settings["priority"]
460
gnutls.library.functions.gnutls_priority_set_direct\
461
(session._c_object, priority, None);
462
463
try:
464
session.handshake()
465
except gnutls.errors.GNUTLSError, error:
466
logger.debug(u"Handshake failed: %s", error)
467
# Do not run session.bye() here: the session is not
468
# established. Just abandon the request.
469
return
470
try:
471
fpr = fingerprint(peer_certificate(session))
472
except (TypeError, gnutls.errors.GNUTLSError), error:
473
logger.debug(u"Bad certificate: %s", error)
474
session.bye()
475
return
476
logger.debug(u"Fingerprint: %s", fpr)
477
client = None
478
for c in self.server.clients:
479
if c.fingerprint == fpr:
480
client = c
481
break
482
if not client:
483
logger.debug(u"Client not found for fingerprint: %s", fpr)
484
session.bye()
485
return
486
# Have to check if client.still_valid(), since it is possible
487
# that the client timed out while establishing the GnuTLS
488
# session.
489
if not client.still_valid():
490
logger.debug(u"Client %(name)s is invalid", vars(client))
491
session.bye()
492
return
493
sent_size = 0
494
while sent_size < len(client.secret):
495
sent = session.send(client.secret[sent_size:])
496
logger.debug(u"Sent: %d, remaining: %d",
497
sent, len(client.secret)
498
- (sent_size + sent))
499
sent_size += sent
500
session.bye()
501
502
503
class IPv6_TCPServer(SocketServer.ForkingTCPServer, object):
504
"""IPv6 TCP server. Accepts 'None' as address and/or port.
1392
505
Attributes:
1393
enabled: Boolean; whether this server is activated yet
1394
interface: None or a network interface name (string)
1395
use_ipv6: Boolean; to use IPv6 or not
506
settings: Server settings
507
clients: Set() of Client objects
1396
508
"""
1397
def __init__(self, server_address, RequestHandlerClass,
1398
interface=None, use_ipv6=True):
1399
self.interface = interface
1400
if use_ipv6:
1401
self.address_family = socket.AF_INET6
1402
socketserver.TCPServer.__init__(self, server_address,
1403
RequestHandlerClass)
509
address_family = socket.AF_INET6
510
def __init__(self, *args, **kwargs):
511
if "settings" in kwargs:
512
self.settings = kwargs["settings"]
513
del kwargs["settings"]
514
if "clients" in kwargs:
515
self.clients = kwargs["clients"]
516
del kwargs["clients"]
517
return super(type(self), self).__init__(*args, **kwargs)
1404
518
def server_bind(self):
1405
519
"""This overrides the normal server_bind() function
1406
520
to bind to an interface if one was specified, and also NOT to
1407
521
bind to an address or port if they were not specified."""
1408
if self.interface is not None:
1409
if SO_BINDTODEVICE is None:
1410
logger.error(u"SO_BINDTODEVICE does not exist;"
1411
u" cannot bind to interface %s",
1412
self.interface)
1413
else:
1414
try:
1415
self.socket.setsockopt(socket.SOL_SOCKET,
1416
SO_BINDTODEVICE,
1417
str(self.interface
1418
+ u'\0'))
1419
except socket.error, error:
1420
if error[0] == errno.EPERM:
1421
logger.error(u"No permission to"
1422
u" bind to interface %s",
1423
self.interface)
1424
elif error[0] == errno.ENOPROTOOPT:
1425
logger.error(u"SO_BINDTODEVICE not available;"
1426
u" cannot bind to interface %s",
1427
self.interface)
1428
else:
1429
raise
522
if self.settings["interface"]:
523
# 25 is from /usr/include/asm-i486/socket.h
524
SO_BINDTODEVICE = getattr(socket, "SO_BINDTODEVICE", 25)
525
try:
526
self.socket.setsockopt(socket.SOL_SOCKET,
527
SO_BINDTODEVICE,
528
self.settings["interface"])
529
except socket.error, error:
530
if error[0] == errno.EPERM:
531
logger.warning(u"No permission to"
532
u" bind to interface %s",
533
self.settings["interface"])
534
else:
535
raise error
1430
536
# Only bind(2) the socket if we really need to.
1431
537
if self.server_address[0] or self.server_address[1]:
1432
538
if not self.server_address[0]:
1433
if self.address_family == socket.AF_INET6:
1434
any_address = u"::" # in6addr_any
1435
else:
1436
any_address = socket.INADDR_ANY
1437
self.server_address = (any_address,
539
in6addr_any = "::"
540
self.server_address = (in6addr_any,
1438
541
self.server_address[1])
1439
elif not self.server_address[1]:
542
elif self.server_address[1] is None:
1440
543
self.server_address = (self.server_address[0],
1441
544
0)
1442
# if self.interface:
1443
# self.server_address = (self.server_address[0],
1444
# 0, # port
1445
# 0, # flowinfo
1446
# if_nametoindex
1447
# (self.interface))
1448
return socketserver.TCPServer.server_bind(self)
1449
1450
1451
class MandosServer(IPv6_TCPServer):
1452
"""Mandos server.
1453
1454
Attributes:
1455
clients: set of Client objects
1456
gnutls_priority GnuTLS priority string
1457
use_dbus: Boolean; to emit D-Bus signals or not
1458
1459
Assumes a gobject.MainLoop event loop.
1460
"""
1461
def __init__(self, server_address, RequestHandlerClass,
1462
interface=None, use_ipv6=True, clients=None,
1463
gnutls_priority=None, use_dbus=True):
1464
self.enabled = False
1465
self.clients = clients
1466
if self.clients is None:
1467
self.clients = set()
1468
self.use_dbus = use_dbus
1469
self.gnutls_priority = gnutls_priority
1470
IPv6_TCPServer.__init__(self, server_address,
1471
RequestHandlerClass,
1472
interface = interface,
1473
use_ipv6 = use_ipv6)
1474
def server_activate(self):
1475
if self.enabled:
1476
return socketserver.TCPServer.server_activate(self)
1477
def enable(self):
1478
self.enabled = True
1479
def add_pipe(self, parent_pipe):
1480
# Call "handle_ipc" for both data and EOF events
1481
gobject.io_add_watch(parent_pipe.fileno(),
1482
gobject.IO_IN | gobject.IO_HUP,
1483
functools.partial(self.handle_ipc,
1484
parent_pipe = parent_pipe))
1485
1486
def handle_ipc(self, source, condition, parent_pipe=None,
1487
client_object=None):
1488
condition_names = {
1489
gobject.IO_IN: u"IN", # There is data to read.
1490
gobject.IO_OUT: u"OUT", # Data can be written (without
1491
# blocking).
1492
gobject.IO_PRI: u"PRI", # There is urgent data to read.
1493
gobject.IO_ERR: u"ERR", # Error condition.
1494
gobject.IO_HUP: u"HUP" # Hung up (the connection has been
1495
# broken, usually for pipes and
1496
# sockets).
1497
}
1498
conditions_string = ' | '.join(name
1499
for cond, name in
1500
condition_names.iteritems()
1501
if cond & condition)
1502
# error or the other end of multiprocessing.Pipe has closed
1503
if condition & (gobject.IO_ERR | condition & gobject.IO_HUP):
1504
return False
1505
1506
# Read a request from the child
1507
request = parent_pipe.recv()
1508
command = request[0]
1509
1510
if command == 'init':
1511
fpr = request[1]
1512
address = request[2]
1513
1514
for c in self.clients:
1515
if c.fingerprint == fpr:
1516
client = c
1517
break
1518
else:
1519
logger.warning(u"Client not found for fingerprint: %s, ad"
1520
u"dress: %s", fpr, address)
1521
if self.use_dbus:
1522
# Emit D-Bus signal
1523
mandos_dbus_service.ClientNotFound(fpr, address)
1524
parent_pipe.send(False)
1525
return False
1526
1527
gobject.io_add_watch(parent_pipe.fileno(),
1528
gobject.IO_IN | gobject.IO_HUP,
1529
functools.partial(self.handle_ipc,
1530
parent_pipe = parent_pipe,
1531
client_object = client))
1532
parent_pipe.send(True)
1533
# remove the old hook in favor of the new above hook on same fileno
1534
return False
1535
if command == 'funcall':
1536
funcname = request[1]
1537
args = request[2]
1538
kwargs = request[3]
1539
1540
parent_pipe.send(('data', getattr(client_object, funcname)(*args, **kwargs)))
1541
1542
if command == 'getattr':
1543
attrname = request[1]
1544
if callable(client_object.__getattribute__(attrname)):
1545
parent_pipe.send(('function',))
1546
else:
1547
parent_pipe.send(('data', client_object.__getattribute__(attrname)))
1548
1549
if command == 'setattr':
1550
attrname = request[1]
1551
value = request[2]
1552
setattr(client_object, attrname, value)
1553
1554
return True
545
return super(type(self), self).server_bind()
1555
546
1556
547
1557
548
def string_to_delta(interval):
1558
549
"""Parse a string and return a datetime.timedelta
1559
1560
>>> string_to_delta(u'7d')
550
551
>>> string_to_delta('7d')
1561
552
datetime.timedelta(7)
1562
>>> string_to_delta(u'60s')
553
>>> string_to_delta('60s')
1563
554
datetime.timedelta(0, 60)
1564
>>> string_to_delta(u'60m')
555
>>> string_to_delta('60m')
1565
556
datetime.timedelta(0, 3600)
1566
>>> string_to_delta(u'24h')
557
>>> string_to_delta('24h')
1567
558
datetime.timedelta(1)
1568
559
>>> string_to_delta(u'1w')
1569
560
datetime.timedelta(7)
1570
>>> string_to_delta(u'5m 30s')
1571
datetime.timedelta(0, 330)
1572
561
"""
1573
timevalue = datetime.timedelta(0)
1574
for s in interval.split():
1575
try:
1576
suffix = unicode(s[-1])
1577
value = int(s[:-1])
1578
if suffix == u"d":
1579
delta = datetime.timedelta(value)
1580
elif suffix == u"s":
1581
delta = datetime.timedelta(0, value)
1582
elif suffix == u"m":
1583
delta = datetime.timedelta(0, 0, 0, 0, value)
1584
elif suffix == u"h":
1585
delta = datetime.timedelta(0, 0, 0, 0, 0, value)
1586
elif suffix == u"w":
1587
delta = datetime.timedelta(0, 0, 0, 0, 0, 0, value)
1588
else:
1589
raise ValueError(u"Unknown suffix %r" % suffix)
1590
except (ValueError, IndexError), e:
1591
raise ValueError(e.message)
1592
timevalue += delta
1593
return timevalue
1594
562
try:
563
suffix=unicode(interval[-1])
564
value=int(interval[:-1])
565
if suffix == u"d":
566
delta = datetime.timedelta(value)
567
elif suffix == u"s":
568
delta = datetime.timedelta(0, value)
569
elif suffix == u"m":
570
delta = datetime.timedelta(0, 0, 0, 0, value)
571
elif suffix == u"h":
572
delta = datetime.timedelta(0, 0, 0, 0, 0, value)
573
elif suffix == u"w":
574
delta = datetime.timedelta(0, 0, 0, 0, 0, 0, value)
575
else:
576
raise ValueError
577
except (ValueError, IndexError):
578
raise ValueError
579
return delta
580
581
582
def server_state_changed(state):
583
"""Derived from the Avahi example code"""
584
if state == avahi.SERVER_COLLISION:
585
logger.warning(u"Server name collision")
586
service.remove()
587
elif state == avahi.SERVER_RUNNING:
588
service.add()
589
590
591
def entry_group_state_changed(state, error):
592
"""Derived from the Avahi example code"""
593
logger.debug(u"state change: %i", state)
594
595
if state == avahi.ENTRY_GROUP_ESTABLISHED:
596
logger.debug(u"Service established.")
597
elif state == avahi.ENTRY_GROUP_COLLISION:
598
logger.warning(u"Service name collision.")
599
service.rename()
600
elif state == avahi.ENTRY_GROUP_FAILURE:
601
logger.critical(u"Error in group state changed %s",
602
unicode(error))
603
raise AvahiGroupError("State changed: %s", str(error))
1595
604
1596
605
def if_nametoindex(interface):
1597
"""Call the C function if_nametoindex(), or equivalent
1598
1599
Note: This function cannot accept a unicode string."""
606
"""Call the C function if_nametoindex(), or equivalent"""
1600
607
global if_nametoindex
1601
608
try:
1602
if_nametoindex = (ctypes.cdll.LoadLibrary
1603
(ctypes.util.find_library(u"c"))
1604
.if_nametoindex)
609
if "ctypes.util" not in sys.modules:
610
import ctypes.util
611
if_nametoindex = ctypes.cdll.LoadLibrary\
612
(ctypes.util.find_library("c")).if_nametoindex
1605
613
except (OSError, AttributeError):
1606
logger.warning(u"Doing if_nametoindex the hard way")
614
if "struct" not in sys.modules:
615
import struct
616
if "fcntl" not in sys.modules:
617
import fcntl
1607
618
def if_nametoindex(interface):
1608
619
"Get an interface index the hard way, i.e. using fcntl()"
1609
620
SIOCGIFINDEX = 0x8933 # From /usr/include/linux/sockios.h
1610
with contextlib.closing(socket.socket()) as s:
1611
ifreq = fcntl.ioctl(s, SIOCGIFINDEX,
1612
struct.pack(str(u"16s16x"),
1613
interface))
1614
interface_index = struct.unpack(str(u"I"),
1615
ifreq[16:20])[0]
621
s = socket.socket()
622
ifreq = fcntl.ioctl(s, SIOCGIFINDEX,
623
struct.pack("16s16x", interface))
624
s.close()
625
interface_index = struct.unpack("I", ifreq[16:20])[0]
1616
626
return interface_index
1617
627
return if_nametoindex(interface)
1618
628
1619
629
1620
def daemon(nochdir = False, noclose = False):
630
def daemon(nochdir, noclose):
1621
631
"""See daemon(3). Standard BSD Unix function.
1622
1623
632
This should really exist as os.daemon, but it doesn't (yet)."""
1624
633
if os.fork():
1625
634
sys.exit()
1626
635
os.setsid()
1627
636
if not nochdir:
1628
os.chdir(u"/")
1629
if os.fork():
1630
sys.exit()
637
os.chdir("/")
1631
638
if not noclose:
1632
639
# Close all standard open file descriptors
1633
640
null = os.open(os.path.devnull, os.O_NOCTTY | os.O_RDWR)
1634
641
if not stat.S_ISCHR(os.fstat(null).st_mode):
1635
642
raise OSError(errno.ENODEV,
1636
u"%s not a character device"
1637
% os.path.devnull)
643
"/dev/null not a character device")
1638
644
os.dup2(null, sys.stdin.fileno())
1639
645
os.dup2(null, sys.stdout.fileno())
1640
646
os.dup2(null, sys.stderr.fileno())
1643
649
1644
650
1645
651
def main():
1646
1647
##################################################################
1648
# Parsing of options, both command line and config file
1649
1650
parser = optparse.OptionParser(version = "%%prog %s" % version)
1651
parser.add_option("-i", u"--interface", type=u"string",
1652
metavar="IF", help=u"Bind to interface IF")
1653
parser.add_option("-a", u"--address", type=u"string",
1654
help=u"Address to listen for requests on")
1655
parser.add_option("-p", u"--port", type=u"int",
1656
help=u"Port number to receive requests on")
1657
parser.add_option("--check", action=u"store_true",
1658
help=u"Run self-test")
1659
parser.add_option("--debug", action=u"store_true",
1660
help=u"Debug mode; run in foreground and log to"
1661
u" terminal")
1662
parser.add_option("--debuglevel", type=u"string", metavar="Level",
1663
help=u"Debug level for stdout output")
1664
parser.add_option("--priority", type=u"string", help=u"GnuTLS"
1665
u" priority string (see GnuTLS documentation)")
1666
parser.add_option("--servicename", type=u"string",
1667
metavar=u"NAME", help=u"Zeroconf service name")
1668
parser.add_option("--configdir", type=u"string",
1669
default=u"/etc/mandos", metavar=u"DIR",
1670
help=u"Directory to search for configuration"
1671
u" files")
1672
parser.add_option("--no-dbus", action=u"store_false",
1673
dest=u"use_dbus", help=u"Do not provide D-Bus"
1674
u" system bus interface")
1675
parser.add_option("--no-ipv6", action=u"store_false",
1676
dest=u"use_ipv6", help=u"Do not use IPv6")
1677
options = parser.parse_args()[0]
652
global main_loop_started
653
main_loop_started = False
654
655
parser = OptionParser()
656
parser.add_option("-i", "--interface", type="string",
657
metavar="IF", help="Bind to interface IF")
658
parser.add_option("-a", "--address", type="string",
659
help="Address to listen for requests on")
660
parser.add_option("-p", "--port", type="int",
661
help="Port number to receive requests on")
662
parser.add_option("--check", action="store_true", default=False,
663
help="Run self-test")
664
parser.add_option("--debug", action="store_true", default=False,
665
help="Debug mode; run in foreground and log to"
666
" terminal")
667
parser.add_option("--priority", type="string", help="GnuTLS"
668
" priority string (see GnuTLS documentation)")
669
parser.add_option("--servicename", type="string", metavar="NAME",
670
help="Zeroconf service name")
671
parser.add_option("--configdir", type="string",
672
default="/etc/mandos", metavar="DIR",
673
help="Directory to search for configuration"
674
" files")
675
(options, args) = parser.parse_args()
1678
676
1679
677
if options.check:
1680
678
import doctest
1682
680
sys.exit()
1683
681
1684
682
# Default values for config file for server-global settings
1685
server_defaults = { u"interface": u"",
1686
u"address": u"",
1687
u"port": u"",
1688
u"debug": u"False",
1689
u"priority":
1690
u"SECURE256:!CTYPE-X.509:+CTYPE-OPENPGP",
1691
u"servicename": u"Mandos",
1692
u"use_dbus": u"True",
1693
u"use_ipv6": u"True",
1694
u"debuglevel": u"",
683
server_defaults = { "interface": "",
684
"address": "",
685
"port": "",
686
"debug": "False",
687
"priority":
688
"SECURE256:!CTYPE-X.509:+CTYPE-OPENPGP",
689
"servicename": "Mandos",
1695
690
}
1696
691
1697
692
# Parse config file for server-global settings
1698
server_config = configparser.SafeConfigParser(server_defaults)
693
server_config = ConfigParser.SafeConfigParser(server_defaults)
1699
694
del server_defaults
1700
server_config.read(os.path.join(options.configdir,
1701
u"mandos.conf"))
695
server_config.read(os.path.join(options.configdir, "server.conf"))
696
server_section = "server"
1702
697
# Convert the SafeConfigParser object to a dict
1703
server_settings = server_config.defaults()
1704
# Use the appropriate methods on the non-string config options
1705
for option in (u"debug", u"use_dbus", u"use_ipv6"):
1706
server_settings[option] = server_config.getboolean(u"DEFAULT",
1707
option)
1708
if server_settings["port"]:
1709
server_settings["port"] = server_config.getint(u"DEFAULT",
1710
u"port")
698
server_settings = dict(server_config.items(server_section))
699
# Use getboolean on the boolean config option
700
server_settings["debug"] = server_config.getboolean\
701
(server_section, "debug")
1711
702
del server_config
1712
703
1713
704
# Override the settings from the config file with command line
1714
705
# options, if set.
1715
for option in (u"interface", u"address", u"port", u"debug",
1716
u"priority", u"servicename", u"configdir",
1717
u"use_dbus", u"use_ipv6", u"debuglevel"):
706
for option in ("interface", "address", "port", "debug",
707
"priority", "servicename", "configdir"):
1718
708
value = getattr(options, option)
1719
709
if value is not None:
1720
710
server_settings[option] = value
1721
711
del options
1722
# Force all strings to be unicode
1723
for option in server_settings.keys():
1724
if type(server_settings[option]) is str:
1725
server_settings[option] = unicode(server_settings[option])
1726
712
# Now we have our good server settings in "server_settings"
1727
713
1728
##################################################################
1729
1730
# For convenience
1731
debug = server_settings[u"debug"]
1732
debuglevel = server_settings[u"debuglevel"]
1733
use_dbus = server_settings[u"use_dbus"]
1734
use_ipv6 = server_settings[u"use_ipv6"]
1735
1736
if server_settings[u"servicename"] != u"Mandos":
1737
syslogger.setFormatter(logging.Formatter
1738
(u'Mandos (%s) [%%(process)d]:'
1739
u' %%(levelname)s: %%(message)s'
1740
% server_settings[u"servicename"]))
1741
1742
714
# Parse config file with clients
1743
client_defaults = { u"timeout": u"1h",
1744
u"interval": u"5m",
1745
u"checker": u"fping -q -- %%(host)s",
1746
u"host": u"",
1747
u"approval_delay": u"0s",
1748
u"approval_duration": u"1s",
715
client_defaults = { "timeout": "1h",
716
"interval": "5m",
717
"checker": "fping -q -- %%(fqdn)s",
1749
718
}
1750
client_config = configparser.SafeConfigParser(client_defaults)
1751
client_config.read(os.path.join(server_settings[u"configdir"],
1752
u"clients.conf"))
1753
1754
global mandos_dbus_service
1755
mandos_dbus_service = None
1756
1757
tcp_server = MandosServer((server_settings[u"address"],
1758
server_settings[u"port"]),
1759
ClientHandler,
1760
interface=(server_settings[u"interface"]
1761
or None),
1762
use_ipv6=use_ipv6,
1763
gnutls_priority=
1764
server_settings[u"priority"],
1765
use_dbus=use_dbus)
1766
if not debug:
1767
pidfilename = u"/var/run/mandos.pid"
1768
try:
1769
pidfile = open(pidfilename, u"w")
1770
except IOError:
1771
logger.error(u"Could not open file %r", pidfilename)
1772
1773
try:
1774
uid = pwd.getpwnam(u"_mandos").pw_uid
1775
gid = pwd.getpwnam(u"_mandos").pw_gid
1776
except KeyError:
1777
try:
1778
uid = pwd.getpwnam(u"mandos").pw_uid
1779
gid = pwd.getpwnam(u"mandos").pw_gid
1780
except KeyError:
1781
try:
1782
uid = pwd.getpwnam(u"nobody").pw_uid
1783
gid = pwd.getpwnam(u"nobody").pw_gid
1784
except KeyError:
1785
uid = 65534
1786
gid = 65534
1787
try:
1788
os.setgid(gid)
1789
os.setuid(uid)
1790
except OSError, error:
1791
if error[0] != errno.EPERM:
1792
raise error
1793
1794
if not debug and not debuglevel:
1795
syslogger.setLevel(logging.WARNING)
1796
console.setLevel(logging.WARNING)
1797
if debuglevel:
1798
level = getattr(logging, debuglevel.upper())
1799
syslogger.setLevel(level)
1800
console.setLevel(level)
1801
1802
if debug:
1803
# Enable all possible GnuTLS debugging
1804
1805
# "Use a log level over 10 to enable all debugging options."
1806
# - GnuTLS manual
1807
gnutls.library.functions.gnutls_global_set_log_level(11)
1808
1809
@gnutls.library.types.gnutls_log_func
1810
def debug_gnutls(level, string):
1811
logger.debug(u"GnuTLS: %s", string[:-1])
1812
1813
(gnutls.library.functions
1814
.gnutls_global_set_log_function(debug_gnutls))
1815
1816
# Redirect stdin so all checkers get /dev/null
1817
null = os.open(os.path.devnull, os.O_NOCTTY | os.O_RDWR)
1818
os.dup2(null, sys.stdin.fileno())
1819
if null > 2:
1820
os.close(null)
1821
else:
1822
# No console logging
1823
logger.removeHandler(console)
1824
719
client_config = ConfigParser.SafeConfigParser(client_defaults)
720
client_config.read(os.path.join(server_settings["configdir"],
721
"clients.conf"))
722
723
global service
724
service = AvahiService(name = server_settings["servicename"],
725
type = "_mandos._tcp", );
726
if server_settings["interface"]:
727
service.interface = if_nametoindex(server_settings["interface"])
1825
728
1826
729
global main_loop
730
global bus
731
global server
1827
732
# From the Avahi example code
1828
733
DBusGMainLoop(set_as_default=True )
1829
734
main_loop = gobject.MainLoop()
1830
735
bus = dbus.SystemBus()
736
server = dbus.Interface(
737
bus.get_object( avahi.DBUS_NAME, avahi.DBUS_PATH_SERVER ),
738
avahi.DBUS_INTERFACE_SERVER )
1831
739
# End of Avahi example code
1832
if use_dbus:
1833
try:
1834
bus_name = dbus.service.BusName(u"se.bsnet.fukt.Mandos",
1835
bus, do_not_queue=True)
1836
except dbus.exceptions.NameExistsException, e:
1837
logger.error(unicode(e) + u", disabling D-Bus")
1838
use_dbus = False
1839
server_settings[u"use_dbus"] = False
1840
tcp_server.use_dbus = False
1841
protocol = avahi.PROTO_INET6 if use_ipv6 else avahi.PROTO_INET
1842
service = AvahiService(name = server_settings[u"servicename"],
1843
servicetype = u"_mandos._tcp",
1844
protocol = protocol, bus = bus)
1845
if server_settings["interface"]:
1846
service.interface = (if_nametoindex
1847
(str(server_settings[u"interface"])))
1848
1849
if not debug:
1850
# Close all input and output, do double fork, etc.
1851
daemon()
1852
1853
global multiprocessing_manager
1854
multiprocessing_manager = multiprocessing.Manager()
1855
1856
client_class = Client
1857
if use_dbus:
1858
client_class = functools.partial(ClientDBus, bus = bus)
1859
def client_config_items(config, section):
1860
special_settings = {
1861
"approved_by_default":
1862
lambda: config.getboolean(section,
1863
"approved_by_default"),
1864
}
1865
for name, value in config.items(section):
1866
try:
1867
yield (name, special_settings[name]())
1868
except KeyError:
1869
yield (name, value)
1870
1871
tcp_server.clients.update(set(
1872
client_class(name = section,
1873
config= dict(client_config_items(
1874
client_config, section)))
1875
for section in client_config.sections()))
1876
if not tcp_server.clients:
1877
logger.warning(u"No clients defined")
1878
1879
if not debug:
1880
try:
1881
with pidfile:
1882
pid = os.getpid()
1883
pidfile.write(str(pid) + "\n")
1884
del pidfile
1885
except IOError:
1886
logger.error(u"Could not write to file %r with PID %d",
1887
pidfilename, pid)
1888
except NameError:
1889
# "pidfile" was never created
1890
pass
1891
del pidfilename
1892
740
741
debug = server_settings["debug"]
742
743
if debug:
744
console = logging.StreamHandler()
745
# console.setLevel(logging.DEBUG)
746
console.setFormatter(logging.Formatter\
747
('%(levelname)s: %(message)s'))
748
logger.addHandler(console)
749
del console
750
751
clients = Set()
752
def remove_from_clients(client):
753
clients.remove(client)
754
if not clients:
755
logger.debug(u"No clients left, exiting")
756
sys.exit()
757
758
clients.update(Set(Client(name=section,
759
stop_hook = remove_from_clients,
760
**(dict(client_config\
761
.items(section))))
762
for section in client_config.sections()))
763
764
if not debug:
765
daemon(False, False)
766
767
def cleanup():
768
"Cleanup function; run on exit"
769
global group
770
# From the Avahi example code
771
if not group is None:
772
group.Free()
773
group = None
774
# End of Avahi example code
775
776
while clients:
777
client = clients.pop()
778
client.stop_hook = None
779
client.stop()
780
781
atexit.register(cleanup)
782
783
if not debug:
1893
784
signal.signal(signal.SIGINT, signal.SIG_IGN)
1894
1895
785
signal.signal(signal.SIGHUP, lambda signum, frame: sys.exit())
1896
786
signal.signal(signal.SIGTERM, lambda signum, frame: sys.exit())
1897
787
1898
if use_dbus:
1899
class MandosDBusService(dbus.service.Object):
1900
"""A D-Bus proxy object"""
1901
def __init__(self):
1902
dbus.service.Object.__init__(self, bus, u"/")
1903
_interface = u"se.bsnet.fukt.Mandos"
1904
1905
@dbus.service.signal(_interface, signature=u"o")
1906
def ClientAdded(self, objpath):
1907
"D-Bus signal"
1908
pass
1909
1910
@dbus.service.signal(_interface, signature=u"ss")
1911
def ClientNotFound(self, fingerprint, address):
1912
"D-Bus signal"
1913
pass
1914
1915
@dbus.service.signal(_interface, signature=u"os")
1916
def ClientRemoved(self, objpath, name):
1917
"D-Bus signal"
1918
pass
1919
1920
@dbus.service.method(_interface, out_signature=u"ao")
1921
def GetAllClients(self):
1922
"D-Bus method"
1923
return dbus.Array(c.dbus_object_path
1924
for c in tcp_server.clients)
1925
1926
@dbus.service.method(_interface,
1927
out_signature=u"a{oa{sv}}")
1928
def GetAllClientsWithProperties(self):
1929
"D-Bus method"
1930
return dbus.Dictionary(
1931
((c.dbus_object_path, c.GetAll(u""))
1932
for c in tcp_server.clients),
1933
signature=u"oa{sv}")
1934
1935
@dbus.service.method(_interface, in_signature=u"o")
1936
def RemoveClient(self, object_path):
1937
"D-Bus method"
1938
for c in tcp_server.clients:
1939
if c.dbus_object_path == object_path:
1940
tcp_server.clients.remove(c)
1941
c.remove_from_connection()
1942
# Don't signal anything except ClientRemoved
1943
c.disable(quiet=True)
1944
# Emit D-Bus signal
1945
self.ClientRemoved(object_path, c.name)
1946
return
1947
raise KeyError(object_path)
1948
1949
del _interface
1950
1951
mandos_dbus_service = MandosDBusService()
1952
1953
def cleanup():
1954
"Cleanup function; run on exit"
1955
service.cleanup()
1956
1957
while tcp_server.clients:
1958
client = tcp_server.clients.pop()
1959
if use_dbus:
1960
client.remove_from_connection()
1961
client.disable_hook = None
1962
# Don't signal anything except ClientRemoved
1963
client.disable(quiet=True)
1964
if use_dbus:
1965
# Emit D-Bus signal
1966
mandos_dbus_service.ClientRemoved(client.dbus_object_path,
1967
client.name)
1968
1969
atexit.register(cleanup)
1970
1971
for client in tcp_server.clients:
1972
if use_dbus:
1973
# Emit D-Bus signal
1974
mandos_dbus_service.ClientAdded(client.dbus_object_path)
1975
client.enable()
1976
1977
tcp_server.enable()
1978
tcp_server.server_activate()
1979
788
for client in clients:
789
client.start()
790
791
tcp_server = IPv6_TCPServer((server_settings["address"],
792
server_settings["port"]),
793
tcp_handler,
794
settings=server_settings,
795
clients=clients)
1980
796
# Find out what port we got
1981
797
service.port = tcp_server.socket.getsockname()[1]
1982
if use_ipv6:
1983
logger.info(u"Now listening on address %r, port %d,"
1984
" flowinfo %d, scope_id %d"
1985
% tcp_server.socket.getsockname())
1986
else: # IPv4
1987
logger.info(u"Now listening on address %r, port %d"
1988
% tcp_server.socket.getsockname())
798
logger.debug(u"Now listening on address %r, port %d, flowinfo %d,"
799
u" scope_id %d" % tcp_server.socket.getsockname())
1989
800
1990
801
#service.interface = tcp_server.socket.getsockname()[3]
1991
802
1992
803
try:
1993
804
# From the Avahi example code
805
server.connect_to_signal("StateChanged", server_state_changed)
1994
806
try:
1995
service.activate()
807
server_state_changed(server.GetState())
1996
808
except dbus.exceptions.DBusException, error:
1997
809
logger.critical(u"DBusException: %s", error)
1998
cleanup()
1999
810
sys.exit(1)
2000
811
# End of Avahi example code
2001
812
2002
813
gobject.io_add_watch(tcp_server.fileno(), gobject.IO_IN,
2003
814
lambda *args, **kwargs:
2004
(tcp_server.handle_request
2005
(*args[2:], **kwargs) or True))
815
tcp_server.handle_request\
816
(*args[2:], **kwargs) or True)
2006
817
2007
logger.debug(u"Starting main loop")
818
logger.debug("Starting main loop")
819
main_loop_started = True
2008
820
main_loop.run()
2009
821
except AvahiError, error:
2010
logger.critical(u"AvahiError: %s", error)
2011
cleanup()
822
logger.critical(u"AvahiError: %s" + unicode(error))
2012
823
sys.exit(1)
2013
824
except KeyboardInterrupt:
2014
825
if debug:
2015
print >> sys.stderr
2016
logger.debug(u"Server received KeyboardInterrupt")
2017
logger.debug(u"Server exiting")
2018
# Must run before the D-Bus bus name gets deregistered
2019
cleanup()
826
print
2020
827
2021
828
if __name__ == '__main__':
2022
829
main()
Loggerhead is a web-based interface for Breezy
Version: 2.0.2.dev0