/mandos/trunk

To get this branch, use:
bzr branch http://bzr.recompile.se/loggerhead/mandos/trunk

« back to all changes in this revision

Viewing changes to mandos

  • Committer: Teddy Hogeborn
  • Date: 2008-10-03 09:32:30 UTC
  • Revision ID: teddy@fukt.bsnet.se-20081003093230-rshn19e0c19zz12i
* .bzrignore (plugins.d/askpass-fifo): Added.

* Makefile (FORTIFY): Added "-fstack-protector-all".
  (mandos, mandos-keygen): Use more strict regexps when updating the
                           version number.

* mandos (Client.__init__): Use os.path.expandvars() and
                            os.path.expanduser() on the "secfile"
                            config value.

* plugins.d/splashy.c: Update comments and order of #include's.
  (main): Check user and group when looking for running splashy
          process.  Do not ignore ENOENT from execl().  Use _exit()
          instead of "return" when an error happens in child
          processes.  Bug fix: Only wait for splashy_update
          completion if it was started.  Bug fix: detect failing
          waitpid().  Only kill splashy_update if it is running.  Do
          the killing of the old splashy process before the fork().
          Do setsid() and setuid(geteuid()) before starting the new
          splashy.  Report failing execl().

* plugins.d/usplash.c: Update comments and order of #include's.
  (main): Check user and group when looking for running usplash
          process.  Do not report execv() error if interrupted by a
          signal.

Show diffs side-by-side

added added

removed removed

Lines of Context:
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
# methods "add" and "remove" in the "AvahiService" class, the
 
10
# "server_state_changed" and "entry_group_state_changed" functions,
 
11
# and some lines in "main".
12
12
13
13
# Everything else is
14
 
# Copyright © 2008,2009 Teddy Hogeborn
15
 
# Copyright © 2008,2009 Björn Påhlsson
 
14
# Copyright © 2008 Teddy Hogeborn & Björn Påhlsson
16
15
17
16
# This program is free software: you can redistribute it and/or modify
18
17
# it under the terms of the GNU General Public License as published by
31
30
# Contact the authors at <mandos@fukt.bsnet.se>.
32
31
33
32
 
34
 
from __future__ import division, with_statement, absolute_import
 
33
from __future__ import division
35
34
 
36
 
import SocketServer as socketserver
 
35
import SocketServer
37
36
import socket
38
 
import optparse
 
37
from optparse import OptionParser
39
38
import datetime
40
39
import errno
41
40
import gnutls.crypto
44
43
import gnutls.library.functions
45
44
import gnutls.library.constants
46
45
import gnutls.library.types
47
 
import ConfigParser as configparser
 
46
import ConfigParser
48
47
import sys
49
48
import re
50
49
import os
51
50
import signal
 
51
from sets import Set
52
52
import subprocess
53
53
import atexit
54
54
import stat
55
55
import logging
56
56
import logging.handlers
57
57
import pwd
58
 
import contextlib
59
 
import struct
60
 
import fcntl
61
 
import functools
62
 
import cPickle as pickle
63
 
import multiprocessing
64
58
 
65
59
import dbus
66
 
import dbus.service
67
60
import gobject
68
61
import avahi
69
62
from dbus.mainloop.glib import DBusGMainLoop
70
63
import ctypes
71
64
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,
90
 
              address = "/dev/log"))
91
 
syslogger.setFormatter(logging.Formatter
92
 
                       (u'Mandos [%(process)d]: %(levelname)s:'
93
 
                        u' %(message)s'))
 
65
 
 
66
version = "1.0"
 
67
 
 
68
logger = logging.Logger('mandos')
 
69
syslogger = logging.handlers.SysLogHandler\
 
70
            (facility = logging.handlers.SysLogHandler.LOG_DAEMON,
 
71
             address = "/dev/log")
 
72
syslogger.setFormatter(logging.Formatter\
 
73
                        ('Mandos: %(levelname)s: %(message)s'))
94
74
logger.addHandler(syslogger)
95
75
 
96
76
console = logging.StreamHandler()
97
 
console.setFormatter(logging.Formatter(u'%(name)s [%(process)d]:'
98
 
                                       u' %(levelname)s:'
99
 
                                       u' %(message)s'))
 
77
console.setFormatter(logging.Formatter('%(name)s: %(levelname)s:'
 
78
                                       ' %(message)s'))
100
79
logger.addHandler(console)
101
80
 
102
81
class AvahiError(Exception):
103
 
    def __init__(self, value, *args, **kwargs):
 
82
    def __init__(self, value):
104
83
        self.value = value
105
 
        super(AvahiError, self).__init__(value, *args, **kwargs)
106
 
    def __unicode__(self):
107
 
        return unicode(repr(self.value))
 
84
        super(AvahiError, self).__init__()
 
85
    def __str__(self):
 
86
        return repr(self.value)
108
87
 
109
88
class AvahiServiceError(AvahiError):
110
89
    pass
115
94
 
116
95
class AvahiService(object):
117
96
    """An Avahi (Zeroconf) service.
118
 
    
119
97
    Attributes:
120
98
    interface: integer; avahi.IF_UNSPEC or an interface index.
121
99
               Used to optionally bind to the specified interface.
122
 
    name: string; Example: u'Mandos'
123
 
    type: string; Example: u'_mandos._tcp'.
 
100
    name: string; Example: 'Mandos'
 
101
    type: string; Example: '_mandos._tcp'.
124
102
                  See <http://www.dns-sd.org/ServiceTypes.html>
125
103
    port: integer; what port to announce
126
104
    TXT: list of strings; TXT record for the service
129
107
    max_renames: integer; maximum number of renames
130
108
    rename_count: integer; counter so we only rename after collisions
131
109
                  a sensible number of times
132
 
    group: D-Bus Entry Group
133
 
    server: D-Bus Server
134
 
    bus: dbus.SystemBus()
135
110
    """
136
111
    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):
 
112
                 servicetype = None, port = None, TXT = None, domain = "",
 
113
                 host = "", max_renames = 32768):
140
114
        self.interface = interface
141
115
        self.name = name
142
116
        self.type = servicetype
143
117
        self.port = port
144
 
        self.TXT = TXT if TXT is not None else []
 
118
        if TXT is None:
 
119
            self.TXT = []
 
120
        else:
 
121
            self.TXT = TXT
145
122
        self.domain = domain
146
123
        self.host = host
147
124
        self.rename_count = 0
148
125
        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
126
    def rename(self):
154
127
        """Derived from the Avahi example code"""
155
128
        if self.rename_count >= self.max_renames:
156
129
            logger.critical(u"No suitable Zeroconf service name found"
157
130
                            u" after %i retries, exiting.",
158
131
                            self.rename_count)
159
 
            raise AvahiServiceError(u"Too many renames")
160
 
        self.name = unicode(self.server.GetAlternativeServiceName(self.name))
 
132
            raise AvahiServiceError("Too many renames")
 
133
        self.name = server.GetAlternativeServiceName(self.name)
161
134
        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))
 
135
                    str(self.name))
 
136
        syslogger.setFormatter(logging.Formatter\
 
137
                               ('Mandos (%s): %%(levelname)s:'
 
138
                               ' %%(message)s' % self.name))
167
139
        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)
 
140
        self.add()
174
141
        self.rename_count += 1
175
142
    def remove(self):
176
143
        """Derived from the Avahi example code"""
177
 
        if self.group is not None:
178
 
            self.group.Reset()
 
144
        if group is not None:
 
145
            group.Reset()
179
146
    def add(self):
180
147
        """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)
 
148
        global group
 
149
        if group is None:
 
150
            group = dbus.Interface\
 
151
                    (bus.get_object(avahi.DBUS_NAME,
 
152
                                    server.EntryGroupNew()),
 
153
                     avahi.DBUS_INTERFACE_ENTRY_GROUP)
 
154
            group.connect_to_signal('StateChanged',
 
155
                                    entry_group_state_changed)
189
156
        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())
 
157
                     service.name, service.type)
 
158
        group.AddService(
 
159
                self.interface,         # interface
 
160
                avahi.PROTO_INET6,      # protocol
 
161
                dbus.UInt32(0),         # flags
 
162
                self.name, self.type,
 
163
                self.domain, self.host,
 
164
                dbus.UInt16(self.port),
 
165
                avahi.string_array_to_txt_array(self.TXT))
 
166
        group.Commit()
 
167
 
 
168
# From the Avahi example code:
 
169
group = None                            # our entry group
 
170
# End of Avahi example code
237
171
 
238
172
 
239
173
class Client(object):
240
174
    """A representation of a client host served by this server.
241
 
    
242
175
    Attributes:
243
 
    name:       string; from the config file, used in log messages and
244
 
                        D-Bus identifiers
 
176
    name:      string; from the config file, used in log messages
245
177
    fingerprint: string (40 or 32 hexadecimal digits); used to
246
178
                 uniquely identify the client
247
 
    secret:     bytestring; sent verbatim (over TLS) to client
248
 
    host:       string; available for use by the checker command
249
 
    created:    datetime.datetime(); (UTC) object creation
250
 
    last_enabled: datetime.datetime(); (UTC)
251
 
    enabled:    bool()
252
 
    last_checked_ok: datetime.datetime(); (UTC) or None
253
 
    timeout:    datetime.timedelta(); How long from last_checked_ok
254
 
                                      until this client is disabled
255
 
    interval:   datetime.timedelta(); How often to start a new checker
256
 
    disable_hook:  If set, called by disable() as disable_hook(self)
257
 
    checker:    subprocess.Popen(); a running checker process used
258
 
                                    to see if the client lives.
259
 
                                    'None' if no process is running.
 
179
    secret:    bytestring; sent verbatim (over TLS) to client
 
180
    host:      string; available for use by the checker command
 
181
    created:   datetime.datetime(); object creation, not client host
 
182
    last_checked_ok: datetime.datetime() or None if not yet checked OK
 
183
    timeout:   datetime.timedelta(); How long from last_checked_ok
 
184
                                     until this client is invalid
 
185
    interval:  datetime.timedelta(); How often to start a new checker
 
186
    stop_hook: If set, called by stop() as stop_hook(self)
 
187
    checker:   subprocess.Popen(); a running checker process used
 
188
                                   to see if the client lives.
 
189
                                   'None' if no process is running.
260
190
    checker_initiator_tag: a gobject event source tag, or None
261
 
    disable_initiator_tag: - '' -
 
191
    stop_initiator_tag:    - '' -
262
192
    checker_callback_tag:  - '' -
263
193
    checker_command: string; External command which is run to check if
264
194
                     client lives.  %() expansions are done at
265
195
                     runtime with vars(self) as dict, so that for
266
196
                     instance %(name)s can be used in the command.
267
 
    current_checker_command: string; current running checker_command
268
 
    approval_delay: datetime.timedelta(); Time to wait for approval
269
 
    _approved:   bool(); 'None' if not yet approved/disapproved
270
 
    approval_duration: datetime.timedelta(); Duration of one approval
 
197
    Private attibutes:
 
198
    _timeout: Real variable for 'timeout'
 
199
    _interval: Real variable for 'interval'
 
200
    _timeout_milliseconds: Used when calling gobject.timeout_add()
 
201
    _interval_milliseconds: - '' -
271
202
    """
272
 
    
273
 
    @staticmethod
274
 
    def _timedelta_to_milliseconds(td):
275
 
        "Convert a datetime.timedelta() to milliseconds"
276
 
        return ((td.days * 24 * 60 * 60 * 1000)
277
 
                + (td.seconds * 1000)
278
 
                + (td.microseconds // 1000))
279
 
    
280
 
    def timeout_milliseconds(self):
281
 
        "Return the 'timeout' attribute in milliseconds"
282
 
        return self._timedelta_to_milliseconds(self.timeout)
283
 
    
284
 
    def interval_milliseconds(self):
285
 
        "Return the 'interval' attribute in milliseconds"
286
 
        return self._timedelta_to_milliseconds(self.interval)
287
 
 
288
 
    def approval_delay_milliseconds(self):
289
 
        return self._timedelta_to_milliseconds(self.approval_delay)
290
 
    
291
 
    def __init__(self, name = None, disable_hook=None, config=None):
 
203
    def _set_timeout(self, timeout):
 
204
        "Setter function for 'timeout' attribute"
 
205
        self._timeout = timeout
 
206
        self._timeout_milliseconds = ((self.timeout.days
 
207
                                       * 24 * 60 * 60 * 1000)
 
208
                                      + (self.timeout.seconds * 1000)
 
209
                                      + (self.timeout.microseconds
 
210
                                         // 1000))
 
211
    timeout = property(lambda self: self._timeout,
 
212
                       _set_timeout)
 
213
    del _set_timeout
 
214
    def _set_interval(self, interval):
 
215
        "Setter function for 'interval' attribute"
 
216
        self._interval = interval
 
217
        self._interval_milliseconds = ((self.interval.days
 
218
                                        * 24 * 60 * 60 * 1000)
 
219
                                       + (self.interval.seconds
 
220
                                          * 1000)
 
221
                                       + (self.interval.microseconds
 
222
                                          // 1000))
 
223
    interval = property(lambda self: self._interval,
 
224
                        _set_interval)
 
225
    del _set_interval
 
226
    def __init__(self, name = None, stop_hook=None, config=None):
292
227
        """Note: the 'checker' key in 'config' sets the
293
228
        'checker_command' attribute and *not* the 'checker'
294
229
        attribute."""
295
 
        self.name = name
296
230
        if config is None:
297
231
            config = {}
 
232
        self.name = name
298
233
        logger.debug(u"Creating client %r", self.name)
299
234
        # Uppercase and remove spaces from fingerprint for later
300
235
        # comparison purposes with return value from the fingerprint()
301
236
        # function
302
 
        self.fingerprint = (config[u"fingerprint"].upper()
303
 
                            .replace(u" ", u""))
 
237
        self.fingerprint = config["fingerprint"].upper()\
 
238
                           .replace(u" ", u"")
304
239
        logger.debug(u"  Fingerprint: %s", self.fingerprint)
305
 
        if u"secret" in config:
306
 
            self.secret = config[u"secret"].decode(u"base64")
307
 
        elif u"secfile" in config:
308
 
            with open(os.path.expanduser(os.path.expandvars
309
 
                                         (config[u"secfile"])),
310
 
                      "rb") as secfile:
311
 
                self.secret = secfile.read()
 
240
        if "secret" in config:
 
241
            self.secret = config["secret"].decode(u"base64")
 
242
        elif "secfile" in config:
 
243
            secfile = open(os.path.expanduser(os.path.expandvars
 
244
                                              (config["secfile"])))
 
245
            self.secret = secfile.read()
 
246
            secfile.close()
312
247
        else:
313
248
            raise TypeError(u"No secret or secfile for client %s"
314
249
                            % self.name)
315
 
        self.host = config.get(u"host", u"")
316
 
        self.created = datetime.datetime.utcnow()
317
 
        self.enabled = False
318
 
        self.last_enabled = None
 
250
        self.host = config.get("host", "")
 
251
        self.created = datetime.datetime.now()
319
252
        self.last_checked_ok = None
320
 
        self.timeout = string_to_delta(config[u"timeout"])
321
 
        self.interval = string_to_delta(config[u"interval"])
322
 
        self.disable_hook = disable_hook
 
253
        self.timeout = string_to_delta(config["timeout"])
 
254
        self.interval = string_to_delta(config["interval"])
 
255
        self.stop_hook = stop_hook
323
256
        self.checker = None
324
257
        self.checker_initiator_tag = None
325
 
        self.disable_initiator_tag = None
 
258
        self.stop_initiator_tag = None
326
259
        self.checker_callback_tag = None
327
 
        self.checker_command = config[u"checker"]
328
 
        self.current_checker_command = None
329
 
        self.last_connect = None
330
 
        self._approved = None
331
 
        self.approved_by_default = config.get(u"approved_by_default",
332
 
                                              True)
333
 
        self.approvals_pending = 0
334
 
        self.approval_delay = string_to_delta(
335
 
            config[u"approval_delay"])
336
 
        self.approval_duration = string_to_delta(
337
 
            config[u"approval_duration"])
338
 
        self.changedstate = multiprocessing_manager.Condition(multiprocessing_manager.Lock())
339
 
    
340
 
    def send_changedstate(self):
341
 
        self.changedstate.acquire()
342
 
        self.changedstate.notify_all()
343
 
        self.changedstate.release()
344
 
        
345
 
    def enable(self):
 
260
        self.check_command = config["checker"]
 
261
    def start(self):
346
262
        """Start this client's checker and timeout hooks"""
347
 
        if getattr(self, u"enabled", False):
348
 
            # Already enabled
349
 
            return
350
 
        self.send_changedstate()
351
 
        self.last_enabled = datetime.datetime.utcnow()
352
263
        # Schedule a new checker to be started an 'interval' from now,
353
264
        # and every interval from then on.
354
 
        self.checker_initiator_tag = (gobject.timeout_add
355
 
                                      (self.interval_milliseconds(),
356
 
                                       self.start_checker))
357
 
        # Schedule a disable() when 'timeout' has passed
358
 
        self.disable_initiator_tag = (gobject.timeout_add
359
 
                                   (self.timeout_milliseconds(),
360
 
                                    self.disable))
361
 
        self.enabled = True
 
265
        self.checker_initiator_tag = gobject.timeout_add\
 
266
                                     (self._interval_milliseconds,
 
267
                                      self.start_checker)
362
268
        # Also start a new checker *right now*.
363
269
        self.start_checker()
364
 
    
365
 
    def disable(self, quiet=True):
366
 
        """Disable this client."""
367
 
        if not getattr(self, "enabled", False):
 
270
        # Schedule a stop() when 'timeout' has passed
 
271
        self.stop_initiator_tag = gobject.timeout_add\
 
272
                                  (self._timeout_milliseconds,
 
273
                                   self.stop)
 
274
    def stop(self):
 
275
        """Stop this client.
 
276
        The possibility that a client might be restarted is left open,
 
277
        but not currently used."""
 
278
        # If this client doesn't have a secret, it is already stopped.
 
279
        if hasattr(self, "secret") and self.secret:
 
280
            logger.info(u"Stopping client %s", self.name)
 
281
            self.secret = None
 
282
        else:
368
283
            return False
369
 
        if not quiet:
370
 
            self.send_changedstate()
371
 
        if not quiet:
372
 
            logger.info(u"Disabling client %s", self.name)
373
 
        if getattr(self, u"disable_initiator_tag", False):
374
 
            gobject.source_remove(self.disable_initiator_tag)
375
 
            self.disable_initiator_tag = None
376
 
        if getattr(self, u"checker_initiator_tag", False):
 
284
        if getattr(self, "stop_initiator_tag", False):
 
285
            gobject.source_remove(self.stop_initiator_tag)
 
286
            self.stop_initiator_tag = None
 
287
        if getattr(self, "checker_initiator_tag", False):
377
288
            gobject.source_remove(self.checker_initiator_tag)
378
289
            self.checker_initiator_tag = None
379
290
        self.stop_checker()
380
 
        if self.disable_hook:
381
 
            self.disable_hook(self)
382
 
        self.enabled = False
 
291
        if self.stop_hook:
 
292
            self.stop_hook(self)
383
293
        # Do not run this again if called by a gobject.timeout_add
384
294
        return False
385
 
    
386
295
    def __del__(self):
387
 
        self.disable_hook = None
388
 
        self.disable()
389
 
    
390
 
    def checker_callback(self, pid, condition, command):
 
296
        self.stop_hook = None
 
297
        self.stop()
 
298
    def checker_callback(self, pid, condition):
391
299
        """The checker has completed, so take appropriate actions."""
 
300
        now = datetime.datetime.now()
392
301
        self.checker_callback_tag = None
393
302
        self.checker = None
394
 
        if os.WIFEXITED(condition):
395
 
            exitstatus = os.WEXITSTATUS(condition)
396
 
            if exitstatus == 0:
397
 
                logger.info(u"Checker for %(name)s succeeded",
398
 
                            vars(self))
399
 
                self.checked_ok()
400
 
            else:
401
 
                logger.info(u"Checker for %(name)s failed",
402
 
                            vars(self))
403
 
        else:
 
303
        if os.WIFEXITED(condition) \
 
304
               and (os.WEXITSTATUS(condition) == 0):
 
305
            logger.info(u"Checker for %(name)s succeeded",
 
306
                        vars(self))
 
307
            self.last_checked_ok = now
 
308
            gobject.source_remove(self.stop_initiator_tag)
 
309
            self.stop_initiator_tag = gobject.timeout_add\
 
310
                                      (self._timeout_milliseconds,
 
311
                                       self.stop)
 
312
        elif not os.WIFEXITED(condition):
404
313
            logger.warning(u"Checker for %(name)s crashed?",
405
314
                           vars(self))
406
 
    
407
 
    def checked_ok(self):
408
 
        """Bump up the timeout for this client.
409
 
        
410
 
        This should only be called when the client has been seen,
411
 
        alive and well.
412
 
        """
413
 
        self.last_checked_ok = datetime.datetime.utcnow()
414
 
        gobject.source_remove(self.disable_initiator_tag)
415
 
        self.disable_initiator_tag = (gobject.timeout_add
416
 
                                      (self.timeout_milliseconds(),
417
 
                                       self.disable))
418
 
    
 
315
        else:
 
316
            logger.info(u"Checker for %(name)s failed",
 
317
                        vars(self))
419
318
    def start_checker(self):
420
319
        """Start a new checker subprocess if one is not running.
421
 
        
422
320
        If a checker already exists, leave it running and do
423
321
        nothing."""
424
322
        # The reason for not killing a running checker is that if we
427
325
        # client would inevitably timeout, since no checker would get
428
326
        # a chance to run to completion.  If we instead leave running
429
327
        # checkers alone, the checker would have to take more time
430
 
        # than 'timeout' for the client to be disabled, which is as it
431
 
        # should be.
432
 
        
433
 
        # If a checker exists, make sure it is not a zombie
434
 
        try:
435
 
            pid, status = os.waitpid(self.checker.pid, os.WNOHANG)
436
 
        except (AttributeError, OSError), error:
437
 
            if (isinstance(error, OSError)
438
 
                and error.errno != errno.ECHILD):
439
 
                raise error
440
 
        else:
441
 
            if pid:
442
 
                logger.warning(u"Checker was a zombie")
443
 
                gobject.source_remove(self.checker_callback_tag)
444
 
                self.checker_callback(pid, status,
445
 
                                      self.current_checker_command)
446
 
        # Start a new checker if needed
 
328
        # than 'timeout' for the client to be declared invalid, which
 
329
        # is as it should be.
447
330
        if self.checker is None:
448
331
            try:
449
 
                # In case checker_command has exactly one % operator
450
 
                command = self.checker_command % self.host
 
332
                # In case check_command has exactly one % operator
 
333
                command = self.check_command % self.host
451
334
            except TypeError:
452
335
                # Escape attributes for the shell
453
 
                escaped_attrs = dict((key,
454
 
                                      re.escape(unicode(str(val),
455
 
                                                        errors=
456
 
                                                        u'replace')))
 
336
                escaped_attrs = dict((key, re.escape(str(val)))
457
337
                                     for key, val in
458
338
                                     vars(self).iteritems())
459
339
                try:
460
 
                    command = self.checker_command % escaped_attrs
 
340
                    command = self.check_command % escaped_attrs
461
341
                except TypeError, error:
462
342
                    logger.error(u'Could not format string "%s":'
463
 
                                 u' %s', self.checker_command, error)
 
343
                                 u' %s', self.check_command, error)
464
344
                    return True # Try again later
465
 
            self.current_checker_command = command
466
345
            try:
467
346
                logger.info(u"Starting checker %r for %s",
468
347
                            command, self.name)
472
351
                # always replaced by /dev/null.)
473
352
                self.checker = subprocess.Popen(command,
474
353
                                                close_fds=True,
475
 
                                                shell=True, cwd=u"/")
476
 
                self.checker_callback_tag = (gobject.child_watch_add
477
 
                                             (self.checker.pid,
478
 
                                              self.checker_callback,
479
 
                                              data=command))
480
 
                # The checker may have completed before the gobject
481
 
                # watch was added.  Check for this.
482
 
                pid, status = os.waitpid(self.checker.pid, os.WNOHANG)
483
 
                if pid:
484
 
                    gobject.source_remove(self.checker_callback_tag)
485
 
                    self.checker_callback(pid, status, command)
 
354
                                                shell=True, cwd="/")
 
355
                self.checker_callback_tag = gobject.child_watch_add\
 
356
                                            (self.checker.pid,
 
357
                                             self.checker_callback)
486
358
            except OSError, error:
487
359
                logger.error(u"Failed to start subprocess: %s",
488
360
                             error)
489
361
        # Re-run this periodically if run by gobject.timeout_add
490
362
        return True
491
 
    
492
363
    def stop_checker(self):
493
364
        """Force the checker process, if any, to stop."""
494
365
        if self.checker_callback_tag:
495
366
            gobject.source_remove(self.checker_callback_tag)
496
367
            self.checker_callback_tag = None
497
 
        if getattr(self, u"checker", None) is None:
 
368
        if getattr(self, "checker", None) is None:
498
369
            return
499
370
        logger.debug(u"Stopping checker for %(name)s", vars(self))
500
371
        try:
501
372
            os.kill(self.checker.pid, signal.SIGTERM)
502
 
            #time.sleep(0.5)
 
373
            #os.sleep(0.5)
503
374
            #if self.checker.poll() is None:
504
375
            #    os.kill(self.checker.pid, signal.SIGKILL)
505
376
        except OSError, error:
506
377
            if error.errno != errno.ESRCH: # No such process
507
378
                raise
508
379
        self.checker = None
509
 
 
510
 
def dbus_service_property(dbus_interface, signature=u"v",
511
 
                          access=u"readwrite", byte_arrays=False):
512
 
    """Decorators for marking methods of a DBusObjectWithProperties to
513
 
    become properties on the D-Bus.
514
 
    
515
 
    The decorated method will be called with no arguments by "Get"
516
 
    and with one argument by "Set".
517
 
    
518
 
    The parameters, where they are supported, are the same as
519
 
    dbus.service.method, except there is only "signature", since the
520
 
    type from Get() and the type sent to Set() is the same.
521
 
    """
522
 
    # Encoding deeply encoded byte arrays is not supported yet by the
523
 
    # "Set" method, so we fail early here:
524
 
    if byte_arrays and signature != u"ay":
525
 
        raise ValueError(u"Byte arrays not supported for non-'ay'"
526
 
                         u" signature %r" % signature)
527
 
    def decorator(func):
528
 
        func._dbus_is_property = True
529
 
        func._dbus_interface = dbus_interface
530
 
        func._dbus_signature = signature
531
 
        func._dbus_access = access
532
 
        func._dbus_name = func.__name__
533
 
        if func._dbus_name.endswith(u"_dbus_property"):
534
 
            func._dbus_name = func._dbus_name[:-14]
535
 
        func._dbus_get_args_options = {u'byte_arrays': byte_arrays }
536
 
        return func
537
 
    return decorator
538
 
 
539
 
 
540
 
class DBusPropertyException(dbus.exceptions.DBusException):
541
 
    """A base class for D-Bus property-related exceptions
542
 
    """
543
 
    def __unicode__(self):
544
 
        return unicode(str(self))
545
 
 
546
 
 
547
 
class DBusPropertyAccessException(DBusPropertyException):
548
 
    """A property's access permissions disallows an operation.
549
 
    """
550
 
    pass
551
 
 
552
 
 
553
 
class DBusPropertyNotFound(DBusPropertyException):
554
 
    """An attempt was made to access a non-existing property.
555
 
    """
556
 
    pass
557
 
 
558
 
 
559
 
class DBusObjectWithProperties(dbus.service.Object):
560
 
    """A D-Bus object with properties.
561
 
 
562
 
    Classes inheriting from this can use the dbus_service_property
563
 
    decorator to expose methods as D-Bus properties.  It exposes the
564
 
    standard Get(), Set(), and GetAll() methods on the D-Bus.
565
 
    """
566
 
    
567
 
    @staticmethod
568
 
    def _is_dbus_property(obj):
569
 
        return getattr(obj, u"_dbus_is_property", False)
570
 
    
571
 
    def _get_all_dbus_properties(self):
572
 
        """Returns a generator of (name, attribute) pairs
573
 
        """
574
 
        return ((prop._dbus_name, prop)
575
 
                for name, prop in
576
 
                inspect.getmembers(self, self._is_dbus_property))
577
 
    
578
 
    def _get_dbus_property(self, interface_name, property_name):
579
 
        """Returns a bound method if one exists which is a D-Bus
580
 
        property with the specified name and interface.
581
 
        """
582
 
        for name in (property_name,
583
 
                     property_name + u"_dbus_property"):
584
 
            prop = getattr(self, name, None)
585
 
            if (prop is None
586
 
                or not self._is_dbus_property(prop)
587
 
                or prop._dbus_name != property_name
588
 
                or (interface_name and prop._dbus_interface
589
 
                    and interface_name != prop._dbus_interface)):
590
 
                continue
591
 
            return prop
592
 
        # No such property
593
 
        raise DBusPropertyNotFound(self.dbus_object_path + u":"
594
 
                                   + interface_name + u"."
595
 
                                   + property_name)
596
 
    
597
 
    @dbus.service.method(dbus.PROPERTIES_IFACE, in_signature=u"ss",
598
 
                         out_signature=u"v")
599
 
    def Get(self, interface_name, property_name):
600
 
        """Standard D-Bus property Get() method, see D-Bus standard.
601
 
        """
602
 
        prop = self._get_dbus_property(interface_name, property_name)
603
 
        if prop._dbus_access == u"write":
604
 
            raise DBusPropertyAccessException(property_name)
605
 
        value = prop()
606
 
        if not hasattr(value, u"variant_level"):
607
 
            return value
608
 
        return type(value)(value, variant_level=value.variant_level+1)
609
 
    
610
 
    @dbus.service.method(dbus.PROPERTIES_IFACE, in_signature=u"ssv")
611
 
    def Set(self, interface_name, property_name, value):
612
 
        """Standard D-Bus property Set() method, see D-Bus standard.
613
 
        """
614
 
        prop = self._get_dbus_property(interface_name, property_name)
615
 
        if prop._dbus_access == u"read":
616
 
            raise DBusPropertyAccessException(property_name)
617
 
        if prop._dbus_get_args_options[u"byte_arrays"]:
618
 
            # The byte_arrays option is not supported yet on
619
 
            # signatures other than "ay".
620
 
            if prop._dbus_signature != u"ay":
621
 
                raise ValueError
622
 
            value = dbus.ByteArray(''.join(unichr(byte)
623
 
                                           for byte in value))
624
 
        prop(value)
625
 
    
626
 
    @dbus.service.method(dbus.PROPERTIES_IFACE, in_signature=u"s",
627
 
                         out_signature=u"a{sv}")
628
 
    def GetAll(self, interface_name):
629
 
        """Standard D-Bus property GetAll() method, see D-Bus
630
 
        standard.
631
 
 
632
 
        Note: Will not include properties with access="write".
633
 
        """
634
 
        all = {}
635
 
        for name, prop in self._get_all_dbus_properties():
636
 
            if (interface_name
637
 
                and interface_name != prop._dbus_interface):
638
 
                # Interface non-empty but did not match
639
 
                continue
640
 
            # Ignore write-only properties
641
 
            if prop._dbus_access == u"write":
642
 
                continue
643
 
            value = prop()
644
 
            if not hasattr(value, u"variant_level"):
645
 
                all[name] = value
646
 
                continue
647
 
            all[name] = type(value)(value, variant_level=
648
 
                                    value.variant_level+1)
649
 
        return dbus.Dictionary(all, signature=u"sv")
650
 
    
651
 
    @dbus.service.method(dbus.INTROSPECTABLE_IFACE,
652
 
                         out_signature=u"s",
653
 
                         path_keyword='object_path',
654
 
                         connection_keyword='connection')
655
 
    def Introspect(self, object_path, connection):
656
 
        """Standard D-Bus method, overloaded to insert property tags.
657
 
        """
658
 
        xmlstring = dbus.service.Object.Introspect(self, object_path,
659
 
                                                   connection)
660
 
        try:
661
 
            document = xml.dom.minidom.parseString(xmlstring)
662
 
            def make_tag(document, name, prop):
663
 
                e = document.createElement(u"property")
664
 
                e.setAttribute(u"name", name)
665
 
                e.setAttribute(u"type", prop._dbus_signature)
666
 
                e.setAttribute(u"access", prop._dbus_access)
667
 
                return e
668
 
            for if_tag in document.getElementsByTagName(u"interface"):
669
 
                for tag in (make_tag(document, name, prop)
670
 
                            for name, prop
671
 
                            in self._get_all_dbus_properties()
672
 
                            if prop._dbus_interface
673
 
                            == if_tag.getAttribute(u"name")):
674
 
                    if_tag.appendChild(tag)
675
 
                # Add the names to the return values for the
676
 
                # "org.freedesktop.DBus.Properties" methods
677
 
                if (if_tag.getAttribute(u"name")
678
 
                    == u"org.freedesktop.DBus.Properties"):
679
 
                    for cn in if_tag.getElementsByTagName(u"method"):
680
 
                        if cn.getAttribute(u"name") == u"Get":
681
 
                            for arg in cn.getElementsByTagName(u"arg"):
682
 
                                if (arg.getAttribute(u"direction")
683
 
                                    == u"out"):
684
 
                                    arg.setAttribute(u"name", u"value")
685
 
                        elif cn.getAttribute(u"name") == u"GetAll":
686
 
                            for arg in cn.getElementsByTagName(u"arg"):
687
 
                                if (arg.getAttribute(u"direction")
688
 
                                    == u"out"):
689
 
                                    arg.setAttribute(u"name", u"props")
690
 
            xmlstring = document.toxml(u"utf-8")
691
 
            document.unlink()
692
 
        except (AttributeError, xml.dom.DOMException,
693
 
                xml.parsers.expat.ExpatError), error:
694
 
            logger.error(u"Failed to override Introspection method",
695
 
                         error)
696
 
        return xmlstring
697
 
 
698
 
 
699
 
class ClientDBus(Client, DBusObjectWithProperties):
700
 
    """A Client class using D-Bus
701
 
    
702
 
    Attributes:
703
 
    dbus_object_path: dbus.ObjectPath
704
 
    bus: dbus.SystemBus()
705
 
    """
706
 
    # dbus.service.Object doesn't use super(), so we can't either.
707
 
    
708
 
    def __init__(self, bus = None, *args, **kwargs):
709
 
        self._approvals_pending = 0
710
 
        self.bus = bus
711
 
        Client.__init__(self, *args, **kwargs)
712
 
        # Only now, when this client is initialized, can it show up on
713
 
        # the D-Bus
714
 
        self.dbus_object_path = (dbus.ObjectPath
715
 
                                 (u"/clients/"
716
 
                                  + self.name.replace(u".", u"_")))
717
 
        DBusObjectWithProperties.__init__(self, self.bus,
718
 
                                          self.dbus_object_path)
719
 
        
720
 
    def _get_approvals_pending(self):
721
 
        return self._approvals_pending
722
 
    def _set_approvals_pending(self, value):
723
 
        old_value = self._approvals_pending
724
 
        self._approvals_pending = value
725
 
        bval = bool(value)
726
 
        if (hasattr(self, "dbus_object_path")
727
 
            and bval is not bool(old_value)):
728
 
            dbus_bool = dbus.Boolean(bval, variant_level=1)
729
 
            self.PropertyChanged(dbus.String(u"ApprovalPending"),
730
 
                                 dbus_bool)
731
 
 
732
 
    approvals_pending = property(_get_approvals_pending,
733
 
                                 _set_approvals_pending)
734
 
    del _get_approvals_pending, _set_approvals_pending
735
 
    
736
 
    @staticmethod
737
 
    def _datetime_to_dbus(dt, variant_level=0):
738
 
        """Convert a UTC datetime.datetime() to a D-Bus type."""
739
 
        return dbus.String(dt.isoformat(),
740
 
                           variant_level=variant_level)
741
 
    
742
 
    def enable(self):
743
 
        oldstate = getattr(self, u"enabled", False)
744
 
        r = Client.enable(self)
745
 
        if oldstate != self.enabled:
746
 
            # Emit D-Bus signals
747
 
            self.PropertyChanged(dbus.String(u"Enabled"),
748
 
                                 dbus.Boolean(True, variant_level=1))
749
 
            self.PropertyChanged(
750
 
                dbus.String(u"LastEnabled"),
751
 
                self._datetime_to_dbus(self.last_enabled,
752
 
                                       variant_level=1))
753
 
        return r
754
 
    
755
 
    def disable(self, quiet = False):
756
 
        oldstate = getattr(self, u"enabled", False)
757
 
        r = Client.disable(self, quiet=quiet)
758
 
        if not quiet and oldstate != self.enabled:
759
 
            # Emit D-Bus signal
760
 
            self.PropertyChanged(dbus.String(u"Enabled"),
761
 
                                 dbus.Boolean(False, variant_level=1))
762
 
        return r
763
 
    
764
 
    def __del__(self, *args, **kwargs):
765
 
        try:
766
 
            self.remove_from_connection()
767
 
        except LookupError:
768
 
            pass
769
 
        if hasattr(DBusObjectWithProperties, u"__del__"):
770
 
            DBusObjectWithProperties.__del__(self, *args, **kwargs)
771
 
        Client.__del__(self, *args, **kwargs)
772
 
    
773
 
    def checker_callback(self, pid, condition, command,
774
 
                         *args, **kwargs):
775
 
        self.checker_callback_tag = None
776
 
        self.checker = None
777
 
        # Emit D-Bus signal
778
 
        self.PropertyChanged(dbus.String(u"CheckerRunning"),
779
 
                             dbus.Boolean(False, variant_level=1))
780
 
        if os.WIFEXITED(condition):
781
 
            exitstatus = os.WEXITSTATUS(condition)
782
 
            # Emit D-Bus signal
783
 
            self.CheckerCompleted(dbus.Int16(exitstatus),
784
 
                                  dbus.Int64(condition),
785
 
                                  dbus.String(command))
786
 
        else:
787
 
            # Emit D-Bus signal
788
 
            self.CheckerCompleted(dbus.Int16(-1),
789
 
                                  dbus.Int64(condition),
790
 
                                  dbus.String(command))
791
 
        
792
 
        return Client.checker_callback(self, pid, condition, command,
793
 
                                       *args, **kwargs)
794
 
    
795
 
    def checked_ok(self, *args, **kwargs):
796
 
        r = Client.checked_ok(self, *args, **kwargs)
797
 
        # Emit D-Bus signal
798
 
        self.PropertyChanged(
799
 
            dbus.String(u"LastCheckedOK"),
800
 
            (self._datetime_to_dbus(self.last_checked_ok,
801
 
                                    variant_level=1)))
802
 
        return r
803
 
    
804
 
    def start_checker(self, *args, **kwargs):
805
 
        old_checker = self.checker
806
 
        if self.checker is not None:
807
 
            old_checker_pid = self.checker.pid
808
 
        else:
809
 
            old_checker_pid = None
810
 
        r = Client.start_checker(self, *args, **kwargs)
811
 
        # Only if new checker process was started
812
 
        if (self.checker is not None
813
 
            and old_checker_pid != self.checker.pid):
814
 
            # Emit D-Bus signal
815
 
            self.CheckerStarted(self.current_checker_command)
816
 
            self.PropertyChanged(
817
 
                dbus.String(u"CheckerRunning"),
818
 
                dbus.Boolean(True, variant_level=1))
819
 
        return r
820
 
    
821
 
    def stop_checker(self, *args, **kwargs):
822
 
        old_checker = getattr(self, u"checker", None)
823
 
        r = Client.stop_checker(self, *args, **kwargs)
824
 
        if (old_checker is not None
825
 
            and getattr(self, u"checker", None) is None):
826
 
            self.PropertyChanged(dbus.String(u"CheckerRunning"),
827
 
                                 dbus.Boolean(False, variant_level=1))
828
 
        return r
829
 
 
830
 
    def _reset_approved(self):
831
 
        self._approved = None
832
 
        return False
833
 
    
834
 
    def approve(self, value=True):
835
 
        self.send_changedstate()
836
 
        self._approved = value
837
 
        gobject.timeout_add(self._timedelta_to_milliseconds
838
 
                            (self.approval_duration),
839
 
                            self._reset_approved)
840
 
    
841
 
    
842
 
    ## D-Bus methods, signals & properties
843
 
    _interface = u"se.bsnet.fukt.Mandos.Client"
844
 
    
845
 
    ## Signals
846
 
    
847
 
    # CheckerCompleted - signal
848
 
    @dbus.service.signal(_interface, signature=u"nxs")
849
 
    def CheckerCompleted(self, exitcode, waitstatus, command):
850
 
        "D-Bus signal"
851
 
        pass
852
 
    
853
 
    # CheckerStarted - signal
854
 
    @dbus.service.signal(_interface, signature=u"s")
855
 
    def CheckerStarted(self, command):
856
 
        "D-Bus signal"
857
 
        pass
858
 
    
859
 
    # PropertyChanged - signal
860
 
    @dbus.service.signal(_interface, signature=u"sv")
861
 
    def PropertyChanged(self, property, value):
862
 
        "D-Bus signal"
863
 
        pass
864
 
    
865
 
    # GotSecret - signal
866
 
    @dbus.service.signal(_interface)
867
 
    def GotSecret(self):
868
 
        """D-Bus signal
869
 
        Is sent after a successful transfer of secret from the Mandos
870
 
        server to mandos-client
871
 
        """
872
 
        pass
873
 
    
874
 
    # Rejected - signal
875
 
    @dbus.service.signal(_interface, signature=u"s")
876
 
    def Rejected(self, reason):
877
 
        "D-Bus signal"
878
 
        pass
879
 
    
880
 
    # NeedApproval - signal
881
 
    @dbus.service.signal(_interface, signature=u"tb")
882
 
    def NeedApproval(self, timeout, default):
883
 
        "D-Bus signal"
884
 
        pass
885
 
    
886
 
    ## Methods
887
 
 
888
 
    # Approve - method
889
 
    @dbus.service.method(_interface, in_signature=u"b")
890
 
    def Approve(self, value):
891
 
        self.approve(value)
892
 
 
893
 
    # CheckedOK - method
894
 
    @dbus.service.method(_interface)
895
 
    def CheckedOK(self):
896
 
        return self.checked_ok()
897
 
    
898
 
    # Enable - method
899
 
    @dbus.service.method(_interface)
900
 
    def Enable(self):
901
 
        "D-Bus method"
902
 
        self.enable()
903
 
    
904
 
    # StartChecker - method
905
 
    @dbus.service.method(_interface)
906
 
    def StartChecker(self):
907
 
        "D-Bus method"
908
 
        self.start_checker()
909
 
    
910
 
    # Disable - method
911
 
    @dbus.service.method(_interface)
912
 
    def Disable(self):
913
 
        "D-Bus method"
914
 
        self.disable()
915
 
    
916
 
    # StopChecker - method
917
 
    @dbus.service.method(_interface)
918
 
    def StopChecker(self):
919
 
        self.stop_checker()
920
 
    
921
 
    ## Properties
922
 
    
923
 
    # ApprovalPending - property
924
 
    @dbus_service_property(_interface, signature=u"b", access=u"read")
925
 
    def ApprovalPending_dbus_property(self):
926
 
        return dbus.Boolean(bool(self.approvals_pending))
927
 
    
928
 
    # ApprovedByDefault - property
929
 
    @dbus_service_property(_interface, signature=u"b",
930
 
                           access=u"readwrite")
931
 
    def ApprovedByDefault_dbus_property(self, value=None):
932
 
        if value is None:       # get
933
 
            return dbus.Boolean(self.approved_by_default)
934
 
        self.approved_by_default = bool(value)
935
 
        # Emit D-Bus signal
936
 
        self.PropertyChanged(dbus.String(u"ApprovedByDefault"),
937
 
                             dbus.Boolean(value, variant_level=1))
938
 
    
939
 
    # ApprovalDelay - property
940
 
    @dbus_service_property(_interface, signature=u"t",
941
 
                           access=u"readwrite")
942
 
    def ApprovalDelay_dbus_property(self, value=None):
943
 
        if value is None:       # get
944
 
            return dbus.UInt64(self.approval_delay_milliseconds())
945
 
        self.approval_delay = datetime.timedelta(0, 0, 0, value)
946
 
        # Emit D-Bus signal
947
 
        self.PropertyChanged(dbus.String(u"ApprovalDelay"),
948
 
                             dbus.UInt64(value, variant_level=1))
949
 
    
950
 
    # ApprovalDuration - property
951
 
    @dbus_service_property(_interface, signature=u"t",
952
 
                           access=u"readwrite")
953
 
    def ApprovalDuration_dbus_property(self, value=None):
954
 
        if value is None:       # get
955
 
            return dbus.UInt64(self._timedelta_to_milliseconds(
956
 
                    self.approval_duration))
957
 
        self.approval_duration = datetime.timedelta(0, 0, 0, value)
958
 
        # Emit D-Bus signal
959
 
        self.PropertyChanged(dbus.String(u"ApprovalDuration"),
960
 
                             dbus.UInt64(value, variant_level=1))
961
 
    
962
 
    # Name - property
963
 
    @dbus_service_property(_interface, signature=u"s", access=u"read")
964
 
    def Name_dbus_property(self):
965
 
        return dbus.String(self.name)
966
 
    
967
 
    # Fingerprint - property
968
 
    @dbus_service_property(_interface, signature=u"s", access=u"read")
969
 
    def Fingerprint_dbus_property(self):
970
 
        return dbus.String(self.fingerprint)
971
 
    
972
 
    # Host - property
973
 
    @dbus_service_property(_interface, signature=u"s",
974
 
                           access=u"readwrite")
975
 
    def Host_dbus_property(self, value=None):
976
 
        if value is None:       # get
977
 
            return dbus.String(self.host)
978
 
        self.host = value
979
 
        # Emit D-Bus signal
980
 
        self.PropertyChanged(dbus.String(u"Host"),
981
 
                             dbus.String(value, variant_level=1))
982
 
    
983
 
    # Created - property
984
 
    @dbus_service_property(_interface, signature=u"s", access=u"read")
985
 
    def Created_dbus_property(self):
986
 
        return dbus.String(self._datetime_to_dbus(self.created))
987
 
    
988
 
    # LastEnabled - property
989
 
    @dbus_service_property(_interface, signature=u"s", access=u"read")
990
 
    def LastEnabled_dbus_property(self):
991
 
        if self.last_enabled is None:
992
 
            return dbus.String(u"")
993
 
        return dbus.String(self._datetime_to_dbus(self.last_enabled))
994
 
    
995
 
    # Enabled - property
996
 
    @dbus_service_property(_interface, signature=u"b",
997
 
                           access=u"readwrite")
998
 
    def Enabled_dbus_property(self, value=None):
999
 
        if value is None:       # get
1000
 
            return dbus.Boolean(self.enabled)
1001
 
        if value:
1002
 
            self.enable()
1003
 
        else:
1004
 
            self.disable()
1005
 
    
1006
 
    # LastCheckedOK - property
1007
 
    @dbus_service_property(_interface, signature=u"s",
1008
 
                           access=u"readwrite")
1009
 
    def LastCheckedOK_dbus_property(self, value=None):
1010
 
        if value is not None:
1011
 
            self.checked_ok()
1012
 
            return
 
380
    def still_valid(self):
 
381
        """Has the timeout not yet passed for this client?"""
 
382
        now = datetime.datetime.now()
1013
383
        if self.last_checked_ok is None:
1014
 
            return dbus.String(u"")
1015
 
        return dbus.String(self._datetime_to_dbus(self
1016
 
                                                  .last_checked_ok))
1017
 
    
1018
 
    # Timeout - property
1019
 
    @dbus_service_property(_interface, signature=u"t",
1020
 
                           access=u"readwrite")
1021
 
    def Timeout_dbus_property(self, value=None):
1022
 
        if value is None:       # get
1023
 
            return dbus.UInt64(self.timeout_milliseconds())
1024
 
        self.timeout = datetime.timedelta(0, 0, 0, value)
1025
 
        # Emit D-Bus signal
1026
 
        self.PropertyChanged(dbus.String(u"Timeout"),
1027
 
                             dbus.UInt64(value, variant_level=1))
1028
 
        if getattr(self, u"disable_initiator_tag", None) is None:
1029
 
            return
1030
 
        # Reschedule timeout
1031
 
        gobject.source_remove(self.disable_initiator_tag)
1032
 
        self.disable_initiator_tag = None
1033
 
        time_to_die = (self.
1034
 
                       _timedelta_to_milliseconds((self
1035
 
                                                   .last_checked_ok
1036
 
                                                   + self.timeout)
1037
 
                                                  - datetime.datetime
1038
 
                                                  .utcnow()))
1039
 
        if time_to_die <= 0:
1040
 
            # The timeout has passed
1041
 
            self.disable()
1042
 
        else:
1043
 
            self.disable_initiator_tag = (gobject.timeout_add
1044
 
                                          (time_to_die, self.disable))
1045
 
    
1046
 
    # Interval - property
1047
 
    @dbus_service_property(_interface, signature=u"t",
1048
 
                           access=u"readwrite")
1049
 
    def Interval_dbus_property(self, value=None):
1050
 
        if value is None:       # get
1051
 
            return dbus.UInt64(self.interval_milliseconds())
1052
 
        self.interval = datetime.timedelta(0, 0, 0, value)
1053
 
        # Emit D-Bus signal
1054
 
        self.PropertyChanged(dbus.String(u"Interval"),
1055
 
                             dbus.UInt64(value, variant_level=1))
1056
 
        if getattr(self, u"checker_initiator_tag", None) is None:
1057
 
            return
1058
 
        # Reschedule checker run
1059
 
        gobject.source_remove(self.checker_initiator_tag)
1060
 
        self.checker_initiator_tag = (gobject.timeout_add
1061
 
                                      (value, self.start_checker))
1062
 
        self.start_checker()    # Start one now, too
1063
 
 
1064
 
    # Checker - property
1065
 
    @dbus_service_property(_interface, signature=u"s",
1066
 
                           access=u"readwrite")
1067
 
    def Checker_dbus_property(self, value=None):
1068
 
        if value is None:       # get
1069
 
            return dbus.String(self.checker_command)
1070
 
        self.checker_command = value
1071
 
        # Emit D-Bus signal
1072
 
        self.PropertyChanged(dbus.String(u"Checker"),
1073
 
                             dbus.String(self.checker_command,
1074
 
                                         variant_level=1))
1075
 
    
1076
 
    # CheckerRunning - property
1077
 
    @dbus_service_property(_interface, signature=u"b",
1078
 
                           access=u"readwrite")
1079
 
    def CheckerRunning_dbus_property(self, value=None):
1080
 
        if value is None:       # get
1081
 
            return dbus.Boolean(self.checker is not None)
1082
 
        if value:
1083
 
            self.start_checker()
1084
 
        else:
1085
 
            self.stop_checker()
1086
 
    
1087
 
    # ObjectPath - property
1088
 
    @dbus_service_property(_interface, signature=u"o", access=u"read")
1089
 
    def ObjectPath_dbus_property(self):
1090
 
        return self.dbus_object_path # is already a dbus.ObjectPath
1091
 
    
1092
 
    # Secret = property
1093
 
    @dbus_service_property(_interface, signature=u"ay",
1094
 
                           access=u"write", byte_arrays=True)
1095
 
    def Secret_dbus_property(self, value):
1096
 
        self.secret = str(value)
1097
 
    
1098
 
    del _interface
1099
 
 
1100
 
 
1101
 
class ProxyClient(object):
1102
 
    def __init__(self, child_pipe, fpr, address):
1103
 
        self._pipe = child_pipe
1104
 
        self._pipe.send(('init', fpr, address))
1105
 
        if not self._pipe.recv():
1106
 
            raise KeyError()
1107
 
 
1108
 
    def __getattribute__(self, name):
1109
 
        if(name == '_pipe'):
1110
 
            return super(ProxyClient, self).__getattribute__(name)
1111
 
        self._pipe.send(('getattr', name))
1112
 
        data = self._pipe.recv()
1113
 
        if data[0] == 'data':
1114
 
            return data[1]
1115
 
        if data[0] == 'function':
1116
 
            def func(*args, **kwargs):
1117
 
                self._pipe.send(('funcall', name, args, kwargs))
1118
 
                return self._pipe.recv()[1]
1119
 
            return func
1120
 
 
1121
 
    def __setattr__(self, name, value):
1122
 
        if(name == '_pipe'):
1123
 
            return super(ProxyClient, self).__setattr__(name, value)
1124
 
        self._pipe.send(('setattr', name, value))
1125
 
 
1126
 
 
1127
 
class ClientHandler(socketserver.BaseRequestHandler, object):
1128
 
    """A class to handle client connections.
1129
 
    
1130
 
    Instantiated once for each connection to handle it.
 
384
            return now < (self.created + self.timeout)
 
385
        else:
 
386
            return now < (self.last_checked_ok + self.timeout)
 
387
 
 
388
 
 
389
def peer_certificate(session):
 
390
    "Return the peer's OpenPGP certificate as a bytestring"
 
391
    # If not an OpenPGP certificate...
 
392
    if gnutls.library.functions.gnutls_certificate_type_get\
 
393
            (session._c_object) \
 
394
           != gnutls.library.constants.GNUTLS_CRT_OPENPGP:
 
395
        # ...do the normal thing
 
396
        return session.peer_certificate
 
397
    list_size = ctypes.c_uint()
 
398
    cert_list = gnutls.library.functions.gnutls_certificate_get_peers\
 
399
        (session._c_object, ctypes.byref(list_size))
 
400
    if list_size.value == 0:
 
401
        return None
 
402
    cert = cert_list[0]
 
403
    return ctypes.string_at(cert.data, cert.size)
 
404
 
 
405
 
 
406
def fingerprint(openpgp):
 
407
    "Convert an OpenPGP bytestring to a hexdigit fingerprint string"
 
408
    # New GnuTLS "datum" with the OpenPGP public key
 
409
    datum = gnutls.library.types.gnutls_datum_t\
 
410
        (ctypes.cast(ctypes.c_char_p(openpgp),
 
411
                     ctypes.POINTER(ctypes.c_ubyte)),
 
412
         ctypes.c_uint(len(openpgp)))
 
413
    # New empty GnuTLS certificate
 
414
    crt = gnutls.library.types.gnutls_openpgp_crt_t()
 
415
    gnutls.library.functions.gnutls_openpgp_crt_init\
 
416
        (ctypes.byref(crt))
 
417
    # Import the OpenPGP public key into the certificate
 
418
    gnutls.library.functions.gnutls_openpgp_crt_import\
 
419
                    (crt, ctypes.byref(datum),
 
420
                     gnutls.library.constants.GNUTLS_OPENPGP_FMT_RAW)
 
421
    # Verify the self signature in the key
 
422
    crtverify = ctypes.c_uint()
 
423
    gnutls.library.functions.gnutls_openpgp_crt_verify_self\
 
424
        (crt, 0, ctypes.byref(crtverify))
 
425
    if crtverify.value != 0:
 
426
        gnutls.library.functions.gnutls_openpgp_crt_deinit(crt)
 
427
        raise gnutls.errors.CertificateSecurityError("Verify failed")
 
428
    # New buffer for the fingerprint
 
429
    buf = ctypes.create_string_buffer(20)
 
430
    buf_len = ctypes.c_size_t()
 
431
    # Get the fingerprint from the certificate into the buffer
 
432
    gnutls.library.functions.gnutls_openpgp_crt_get_fingerprint\
 
433
        (crt, ctypes.byref(buf), ctypes.byref(buf_len))
 
434
    # Deinit the certificate
 
435
    gnutls.library.functions.gnutls_openpgp_crt_deinit(crt)
 
436
    # Convert the buffer to a Python bytestring
 
437
    fpr = ctypes.string_at(buf, buf_len.value)
 
438
    # Convert the bytestring to hexadecimal notation
 
439
    hex_fpr = u''.join(u"%02X" % ord(char) for char in fpr)
 
440
    return hex_fpr
 
441
 
 
442
 
 
443
class TCP_handler(SocketServer.BaseRequestHandler, object):
 
444
    """A TCP request handler class.
 
445
    Instantiated by IPv6_TCPServer for each request to handle it.
1131
446
    Note: This will run in its own forked process."""
1132
447
    
1133
448
    def handle(self):
1134
 
        with contextlib.closing(self.server.child_pipe) as child_pipe:
1135
 
            logger.info(u"TCP connection from: %s",
1136
 
                        unicode(self.client_address))
1137
 
            logger.debug(u"Pipe FD: %d",
1138
 
                         self.server.child_pipe.fileno())
1139
 
 
1140
 
            session = (gnutls.connection
1141
 
                       .ClientSession(self.request,
1142
 
                                      gnutls.connection
1143
 
                                      .X509Credentials()))
1144
 
 
1145
 
            # Note: gnutls.connection.X509Credentials is really a
1146
 
            # generic GnuTLS certificate credentials object so long as
1147
 
            # no X.509 keys are added to it.  Therefore, we can use it
1148
 
            # here despite using OpenPGP certificates.
1149
 
 
1150
 
            #priority = u':'.join((u"NONE", u"+VERS-TLS1.1",
1151
 
            #                      u"+AES-256-CBC", u"+SHA1",
1152
 
            #                      u"+COMP-NULL", u"+CTYPE-OPENPGP",
1153
 
            #                      u"+DHE-DSS"))
1154
 
            # Use a fallback default, since this MUST be set.
1155
 
            priority = self.server.gnutls_priority
1156
 
            if priority is None:
1157
 
                priority = u"NORMAL"
1158
 
            (gnutls.library.functions
1159
 
             .gnutls_priority_set_direct(session._c_object,
1160
 
                                         priority, None))
1161
 
 
1162
 
            # Start communication using the Mandos protocol
1163
 
            # Get protocol number
1164
 
            line = self.request.makefile().readline()
1165
 
            logger.debug(u"Protocol version: %r", line)
1166
 
            try:
1167
 
                if int(line.strip().split()[0]) > 1:
1168
 
                    raise RuntimeError
1169
 
            except (ValueError, IndexError, RuntimeError), error:
1170
 
                logger.error(u"Unknown protocol version: %s", error)
1171
 
                return
1172
 
 
1173
 
            # Start GnuTLS connection
1174
 
            try:
1175
 
                session.handshake()
1176
 
            except gnutls.errors.GNUTLSError, error:
1177
 
                logger.warning(u"Handshake failed: %s", error)
1178
 
                # Do not run session.bye() here: the session is not
1179
 
                # established.  Just abandon the request.
1180
 
                return
1181
 
            logger.debug(u"Handshake succeeded")
1182
 
 
1183
 
            approval_required = False
1184
 
            try:
1185
 
                try:
1186
 
                    fpr = self.fingerprint(self.peer_certificate
1187
 
                                           (session))
1188
 
                except (TypeError, gnutls.errors.GNUTLSError), error:
1189
 
                    logger.warning(u"Bad certificate: %s", error)
1190
 
                    return
1191
 
                logger.debug(u"Fingerprint: %s", fpr)
1192
 
 
1193
 
                try:
1194
 
                    client = ProxyClient(child_pipe, fpr,
1195
 
                                         self.client_address)
1196
 
                except KeyError:
1197
 
                    return
1198
 
                
1199
 
                if client.approval_delay:
1200
 
                    delay = client.approval_delay
1201
 
                    client.approvals_pending += 1
1202
 
                    approval_required = True
1203
 
                
1204
 
                while True:
1205
 
                    if not client.enabled:
1206
 
                        logger.warning(u"Client %s is disabled",
1207
 
                                       client.name)
1208
 
                        if self.server.use_dbus:
1209
 
                            # Emit D-Bus signal
1210
 
                            client.Rejected("Disabled")                    
1211
 
                        return
1212
 
                    
1213
 
                    if client._approved or not client.approval_delay:
1214
 
                        #We are approved or approval is disabled
1215
 
                        break
1216
 
                    elif client._approved is None:
1217
 
                        logger.info(u"Client %s needs approval",
1218
 
                                    client.name)
1219
 
                        if self.server.use_dbus:
1220
 
                            # Emit D-Bus signal
1221
 
                            client.NeedApproval(
1222
 
                                client.approval_delay_milliseconds(),
1223
 
                                client.approved_by_default)
1224
 
                    else:
1225
 
                        logger.warning(u"Client %s was not approved",
1226
 
                                       client.name)
1227
 
                        if self.server.use_dbus:
1228
 
                            # Emit D-Bus signal
1229
 
                            client.Rejected("Denied")
1230
 
                        return
1231
 
                    
1232
 
                    #wait until timeout or approved
1233
 
                    #x = float(client._timedelta_to_milliseconds(delay))
1234
 
                    time = datetime.datetime.now()
1235
 
                    client.changedstate.acquire()
1236
 
                    client.changedstate.wait(float(client._timedelta_to_milliseconds(delay) / 1000))
1237
 
                    client.changedstate.release()
1238
 
                    time2 = datetime.datetime.now()
1239
 
                    if (time2 - time) >= delay:
1240
 
                        if not client.approved_by_default:
1241
 
                            logger.warning("Client %s timed out while"
1242
 
                                           " waiting for approval",
1243
 
                                           client.name)
1244
 
                            if self.server.use_dbus:
1245
 
                                # Emit D-Bus signal
1246
 
                                client.Rejected("Timed out")
1247
 
                            return
1248
 
                        else:
1249
 
                            break
1250
 
                    else:
1251
 
                        delay -= time2 - time
1252
 
                
1253
 
                sent_size = 0
1254
 
                while sent_size < len(client.secret):
1255
 
                    try:
1256
 
                        sent = session.send(client.secret[sent_size:])
1257
 
                    except (gnutls.errors.GNUTLSError), error:
1258
 
                        logger.warning("gnutls send failed")
1259
 
                        return
1260
 
                    logger.debug(u"Sent: %d, remaining: %d",
1261
 
                                 sent, len(client.secret)
1262
 
                                 - (sent_size + sent))
1263
 
                    sent_size += sent
1264
 
 
1265
 
                logger.info(u"Sending secret to %s", client.name)
1266
 
                # bump the timeout as if seen
1267
 
                client.checked_ok()
1268
 
                if self.server.use_dbus:
1269
 
                    # Emit D-Bus signal
1270
 
                    client.GotSecret()
1271
 
            
1272
 
            finally:
1273
 
                if approval_required:
1274
 
                    client.approvals_pending -= 1
1275
 
                try:
1276
 
                    session.bye()
1277
 
                except (gnutls.errors.GNUTLSError), error:
1278
 
                    logger.warning("GnuTLS bye failed")
1279
 
    
1280
 
    @staticmethod
1281
 
    def peer_certificate(session):
1282
 
        "Return the peer's OpenPGP certificate as a bytestring"
1283
 
        # If not an OpenPGP certificate...
1284
 
        if (gnutls.library.functions
1285
 
            .gnutls_certificate_type_get(session._c_object)
1286
 
            != gnutls.library.constants.GNUTLS_CRT_OPENPGP):
1287
 
            # ...do the normal thing
1288
 
            return session.peer_certificate
1289
 
        list_size = ctypes.c_uint(1)
1290
 
        cert_list = (gnutls.library.functions
1291
 
                     .gnutls_certificate_get_peers
1292
 
                     (session._c_object, ctypes.byref(list_size)))
1293
 
        if not bool(cert_list) and list_size.value != 0:
1294
 
            raise gnutls.errors.GNUTLSError(u"error getting peer"
1295
 
                                            u" certificate")
1296
 
        if list_size.value == 0:
1297
 
            return None
1298
 
        cert = cert_list[0]
1299
 
        return ctypes.string_at(cert.data, cert.size)
1300
 
    
1301
 
    @staticmethod
1302
 
    def fingerprint(openpgp):
1303
 
        "Convert an OpenPGP bytestring to a hexdigit fingerprint"
1304
 
        # New GnuTLS "datum" with the OpenPGP public key
1305
 
        datum = (gnutls.library.types
1306
 
                 .gnutls_datum_t(ctypes.cast(ctypes.c_char_p(openpgp),
1307
 
                                             ctypes.POINTER
1308
 
                                             (ctypes.c_ubyte)),
1309
 
                                 ctypes.c_uint(len(openpgp))))
1310
 
        # New empty GnuTLS certificate
1311
 
        crt = gnutls.library.types.gnutls_openpgp_crt_t()
1312
 
        (gnutls.library.functions
1313
 
         .gnutls_openpgp_crt_init(ctypes.byref(crt)))
1314
 
        # Import the OpenPGP public key into the certificate
1315
 
        (gnutls.library.functions
1316
 
         .gnutls_openpgp_crt_import(crt, ctypes.byref(datum),
1317
 
                                    gnutls.library.constants
1318
 
                                    .GNUTLS_OPENPGP_FMT_RAW))
1319
 
        # Verify the self signature in the key
1320
 
        crtverify = ctypes.c_uint()
1321
 
        (gnutls.library.functions
1322
 
         .gnutls_openpgp_crt_verify_self(crt, 0,
1323
 
                                         ctypes.byref(crtverify)))
1324
 
        if crtverify.value != 0:
1325
 
            gnutls.library.functions.gnutls_openpgp_crt_deinit(crt)
1326
 
            raise (gnutls.errors.CertificateSecurityError
1327
 
                   (u"Verify failed"))
1328
 
        # New buffer for the fingerprint
1329
 
        buf = ctypes.create_string_buffer(20)
1330
 
        buf_len = ctypes.c_size_t()
1331
 
        # Get the fingerprint from the certificate into the buffer
1332
 
        (gnutls.library.functions
1333
 
         .gnutls_openpgp_crt_get_fingerprint(crt, ctypes.byref(buf),
1334
 
                                             ctypes.byref(buf_len)))
1335
 
        # Deinit the certificate
1336
 
        gnutls.library.functions.gnutls_openpgp_crt_deinit(crt)
1337
 
        # Convert the buffer to a Python bytestring
1338
 
        fpr = ctypes.string_at(buf, buf_len.value)
1339
 
        # Convert the bytestring to hexadecimal notation
1340
 
        hex_fpr = u''.join(u"%02X" % ord(char) for char in fpr)
1341
 
        return hex_fpr
1342
 
 
1343
 
 
1344
 
class MultiprocessingMixIn(object):
1345
 
    """Like socketserver.ThreadingMixIn, but with multiprocessing"""
1346
 
    def sub_process_main(self, request, address):
1347
 
        try:
1348
 
            self.finish_request(request, address)
1349
 
        except:
1350
 
            self.handle_error(request, address)
1351
 
        self.close_request(request)
1352
 
            
1353
 
    def process_request(self, request, address):
1354
 
        """Start a new process to process the request."""
1355
 
        multiprocessing.Process(target = self.sub_process_main,
1356
 
                                args = (request, address)).start()
1357
 
 
1358
 
class MultiprocessingMixInWithPipe(MultiprocessingMixIn, object):
1359
 
    """ adds a pipe to the MixIn """
1360
 
    def process_request(self, request, client_address):
1361
 
        """Overrides and wraps the original process_request().
1362
 
        
1363
 
        This function creates a new pipe in self.pipe
1364
 
        """
1365
 
        parent_pipe, self.child_pipe = multiprocessing.Pipe()
1366
 
 
1367
 
        super(MultiprocessingMixInWithPipe,
1368
 
              self).process_request(request, client_address)
1369
 
        self.child_pipe.close()
1370
 
        self.add_pipe(parent_pipe)
1371
 
 
1372
 
    def add_pipe(self, parent_pipe):
1373
 
        """Dummy function; override as necessary"""
1374
 
        pass
1375
 
 
1376
 
class IPv6_TCPServer(MultiprocessingMixInWithPipe,
1377
 
                     socketserver.TCPServer, object):
1378
 
    """IPv6-capable TCP server.  Accepts 'None' as address and/or port
1379
 
    
 
449
        logger.info(u"TCP connection from: %s",
 
450
                     unicode(self.client_address))
 
451
        session = gnutls.connection.ClientSession\
 
452
                  (self.request, gnutls.connection.X509Credentials())
 
453
        
 
454
        line = self.request.makefile().readline()
 
455
        logger.debug(u"Protocol version: %r", line)
 
456
        try:
 
457
            if int(line.strip().split()[0]) > 1:
 
458
                raise RuntimeError
 
459
        except (ValueError, IndexError, RuntimeError), error:
 
460
            logger.error(u"Unknown protocol version: %s", error)
 
461
            return
 
462
        
 
463
        # Note: gnutls.connection.X509Credentials is really a generic
 
464
        # GnuTLS certificate credentials object so long as no X.509
 
465
        # keys are added to it.  Therefore, we can use it here despite
 
466
        # using OpenPGP certificates.
 
467
        
 
468
        #priority = ':'.join(("NONE", "+VERS-TLS1.1", "+AES-256-CBC",
 
469
        #                "+SHA1", "+COMP-NULL", "+CTYPE-OPENPGP",
 
470
        #                "+DHE-DSS"))
 
471
        priority = "NORMAL"             # Fallback default, since this
 
472
                                        # MUST be set.
 
473
        if self.server.settings["priority"]:
 
474
            priority = self.server.settings["priority"]
 
475
        gnutls.library.functions.gnutls_priority_set_direct\
 
476
            (session._c_object, priority, None)
 
477
        
 
478
        try:
 
479
            session.handshake()
 
480
        except gnutls.errors.GNUTLSError, error:
 
481
            logger.warning(u"Handshake failed: %s", error)
 
482
            # Do not run session.bye() here: the session is not
 
483
            # established.  Just abandon the request.
 
484
            return
 
485
        try:
 
486
            fpr = fingerprint(peer_certificate(session))
 
487
        except (TypeError, gnutls.errors.GNUTLSError), error:
 
488
            logger.warning(u"Bad certificate: %s", error)
 
489
            session.bye()
 
490
            return
 
491
        logger.debug(u"Fingerprint: %s", fpr)
 
492
        client = None
 
493
        for c in self.server.clients:
 
494
            if c.fingerprint == fpr:
 
495
                client = c
 
496
                break
 
497
        if not client:
 
498
            logger.warning(u"Client not found for fingerprint: %s",
 
499
                           fpr)
 
500
            session.bye()
 
501
            return
 
502
        # Have to check if client.still_valid(), since it is possible
 
503
        # that the client timed out while establishing the GnuTLS
 
504
        # session.
 
505
        if not client.still_valid():
 
506
            logger.warning(u"Client %(name)s is invalid",
 
507
                           vars(client))
 
508
            session.bye()
 
509
            return
 
510
        sent_size = 0
 
511
        while sent_size < len(client.secret):
 
512
            sent = session.send(client.secret[sent_size:])
 
513
            logger.debug(u"Sent: %d, remaining: %d",
 
514
                         sent, len(client.secret)
 
515
                         - (sent_size + sent))
 
516
            sent_size += sent
 
517
        session.bye()
 
518
 
 
519
 
 
520
class IPv6_TCPServer(SocketServer.ForkingTCPServer, object):
 
521
    """IPv6 TCP server.  Accepts 'None' as address and/or port.
1380
522
    Attributes:
 
523
        settings:       Server settings
 
524
        clients:        Set() of Client objects
1381
525
        enabled:        Boolean; whether this server is activated yet
1382
 
        interface:      None or a network interface name (string)
1383
 
        use_ipv6:       Boolean; to use IPv6 or not
1384
526
    """
1385
 
    def __init__(self, server_address, RequestHandlerClass,
1386
 
                 interface=None, use_ipv6=True):
1387
 
        self.interface = interface
1388
 
        if use_ipv6:
1389
 
            self.address_family = socket.AF_INET6
1390
 
        socketserver.TCPServer.__init__(self, server_address,
1391
 
                                        RequestHandlerClass)
 
527
    address_family = socket.AF_INET6
 
528
    def __init__(self, *args, **kwargs):
 
529
        if "settings" in kwargs:
 
530
            self.settings = kwargs["settings"]
 
531
            del kwargs["settings"]
 
532
        if "clients" in kwargs:
 
533
            self.clients = kwargs["clients"]
 
534
            del kwargs["clients"]
 
535
        self.enabled = False
 
536
        super(IPv6_TCPServer, self).__init__(*args, **kwargs)
1392
537
    def server_bind(self):
1393
538
        """This overrides the normal server_bind() function
1394
539
        to bind to an interface if one was specified, and also NOT to
1395
540
        bind to an address or port if they were not specified."""
1396
 
        if self.interface is not None:
1397
 
            if SO_BINDTODEVICE is None:
1398
 
                logger.error(u"SO_BINDTODEVICE does not exist;"
1399
 
                             u" cannot bind to interface %s",
1400
 
                             self.interface)
1401
 
            else:
1402
 
                try:
1403
 
                    self.socket.setsockopt(socket.SOL_SOCKET,
1404
 
                                           SO_BINDTODEVICE,
1405
 
                                           str(self.interface
1406
 
                                               + u'\0'))
1407
 
                except socket.error, error:
1408
 
                    if error[0] == errno.EPERM:
1409
 
                        logger.error(u"No permission to"
1410
 
                                     u" bind to interface %s",
1411
 
                                     self.interface)
1412
 
                    elif error[0] == errno.ENOPROTOOPT:
1413
 
                        logger.error(u"SO_BINDTODEVICE not available;"
1414
 
                                     u" cannot bind to interface %s",
1415
 
                                     self.interface)
1416
 
                    else:
1417
 
                        raise
 
541
        if self.settings["interface"]:
 
542
            # 25 is from /usr/include/asm-i486/socket.h
 
543
            SO_BINDTODEVICE = getattr(socket, "SO_BINDTODEVICE", 25)
 
544
            try:
 
545
                self.socket.setsockopt(socket.SOL_SOCKET,
 
546
                                       SO_BINDTODEVICE,
 
547
                                       self.settings["interface"])
 
548
            except socket.error, error:
 
549
                if error[0] == errno.EPERM:
 
550
                    logger.error(u"No permission to"
 
551
                                 u" bind to interface %s",
 
552
                                 self.settings["interface"])
 
553
                else:
 
554
                    raise error
1418
555
        # Only bind(2) the socket if we really need to.
1419
556
        if self.server_address[0] or self.server_address[1]:
1420
557
            if not self.server_address[0]:
1421
 
                if self.address_family == socket.AF_INET6:
1422
 
                    any_address = u"::" # in6addr_any
1423
 
                else:
1424
 
                    any_address = socket.INADDR_ANY
1425
 
                self.server_address = (any_address,
 
558
                in6addr_any = "::"
 
559
                self.server_address = (in6addr_any,
1426
560
                                       self.server_address[1])
1427
561
            elif not self.server_address[1]:
1428
562
                self.server_address = (self.server_address[0],
1429
563
                                       0)
1430
 
#                 if self.interface:
 
564
#                 if self.settings["interface"]:
1431
565
#                     self.server_address = (self.server_address[0],
1432
566
#                                            0, # port
1433
567
#                                            0, # flowinfo
1434
568
#                                            if_nametoindex
1435
 
#                                            (self.interface))
1436
 
            return socketserver.TCPServer.server_bind(self)
1437
 
 
1438
 
 
1439
 
class MandosServer(IPv6_TCPServer):
1440
 
    """Mandos server.
1441
 
    
1442
 
    Attributes:
1443
 
        clients:        set of Client objects
1444
 
        gnutls_priority GnuTLS priority string
1445
 
        use_dbus:       Boolean; to emit D-Bus signals or not
1446
 
    
1447
 
    Assumes a gobject.MainLoop event loop.
1448
 
    """
1449
 
    def __init__(self, server_address, RequestHandlerClass,
1450
 
                 interface=None, use_ipv6=True, clients=None,
1451
 
                 gnutls_priority=None, use_dbus=True):
1452
 
        self.enabled = False
1453
 
        self.clients = clients
1454
 
        if self.clients is None:
1455
 
            self.clients = set()
1456
 
        self.use_dbus = use_dbus
1457
 
        self.gnutls_priority = gnutls_priority
1458
 
        IPv6_TCPServer.__init__(self, server_address,
1459
 
                                RequestHandlerClass,
1460
 
                                interface = interface,
1461
 
                                use_ipv6 = use_ipv6)
 
569
#                                            (self.settings
 
570
#                                             ["interface"]))
 
571
            return super(IPv6_TCPServer, self).server_bind()
1462
572
    def server_activate(self):
1463
573
        if self.enabled:
1464
 
            return socketserver.TCPServer.server_activate(self)
 
574
            return super(IPv6_TCPServer, self).server_activate()
1465
575
    def enable(self):
1466
576
        self.enabled = True
1467
 
    def add_pipe(self, parent_pipe):
1468
 
        # Call "handle_ipc" for both data and EOF events
1469
 
        gobject.io_add_watch(parent_pipe.fileno(),
1470
 
                             gobject.IO_IN | gobject.IO_HUP,
1471
 
                             functools.partial(self.handle_ipc,
1472
 
                                               parent_pipe = parent_pipe))
1473
 
        
1474
 
    def handle_ipc(self, source, condition, parent_pipe=None,
1475
 
                   client_object=None):
1476
 
        condition_names = {
1477
 
            gobject.IO_IN: u"IN",   # There is data to read.
1478
 
            gobject.IO_OUT: u"OUT", # Data can be written (without
1479
 
                                    # blocking).
1480
 
            gobject.IO_PRI: u"PRI", # There is urgent data to read.
1481
 
            gobject.IO_ERR: u"ERR", # Error condition.
1482
 
            gobject.IO_HUP: u"HUP"  # Hung up (the connection has been
1483
 
                                    # broken, usually for pipes and
1484
 
                                    # sockets).
1485
 
            }
1486
 
        conditions_string = ' | '.join(name
1487
 
                                       for cond, name in
1488
 
                                       condition_names.iteritems()
1489
 
                                       if cond & condition)
1490
 
        logger.debug(u"Handling IPC: FD = %d, condition = %s", source,
1491
 
                     conditions_string)
1492
 
 
1493
 
        # error or the other end of multiprocessing.Pipe has closed
1494
 
        if condition & (gobject.IO_ERR | condition & gobject.IO_HUP):
1495
 
            return False
1496
 
        
1497
 
        # Read a request from the child
1498
 
        request = parent_pipe.recv()
1499
 
        logger.debug(u"IPC request: %s", repr(request))
1500
 
        command = request[0]
1501
 
        
1502
 
        if command == 'init':
1503
 
            fpr = request[1]
1504
 
            address = request[2]
1505
 
            
1506
 
            for c in self.clients:
1507
 
                if c.fingerprint == fpr:
1508
 
                    client = c
1509
 
                    break
1510
 
            else:
1511
 
                logger.warning(u"Client not found for fingerprint: %s, ad"
1512
 
                               u"dress: %s", fpr, address)
1513
 
                if self.use_dbus:
1514
 
                    # Emit D-Bus signal
1515
 
                    mandos_dbus_service.ClientNotFound(fpr, address)
1516
 
                parent_pipe.send(False)
1517
 
                return False
1518
 
            
1519
 
            gobject.io_add_watch(parent_pipe.fileno(),
1520
 
                                 gobject.IO_IN | gobject.IO_HUP,
1521
 
                                 functools.partial(self.handle_ipc,
1522
 
                                                   parent_pipe = parent_pipe,
1523
 
                                                   client_object = client))
1524
 
            parent_pipe.send(True)
1525
 
            # remove the old hook in favor of the new above hook on same fileno
1526
 
            return False
1527
 
        if command == 'funcall':
1528
 
            funcname = request[1]
1529
 
            args = request[2]
1530
 
            kwargs = request[3]
1531
 
            
1532
 
            parent_pipe.send(('data', getattr(client_object, funcname)(*args, **kwargs)))
1533
 
 
1534
 
        if command == 'getattr':
1535
 
            attrname = request[1]
1536
 
            if callable(client_object.__getattribute__(attrname)):
1537
 
                parent_pipe.send(('function',))
1538
 
            else:
1539
 
                parent_pipe.send(('data', client_object.__getattribute__(attrname)))
1540
 
        
1541
 
        if command == 'setattr':
1542
 
            attrname = request[1]
1543
 
            value = request[2]
1544
 
            setattr(client_object, attrname, value)
1545
 
 
1546
 
        return True
1547
577
 
1548
578
 
1549
579
def string_to_delta(interval):
1550
580
    """Parse a string and return a datetime.timedelta
1551
 
    
1552
 
    >>> string_to_delta(u'7d')
 
581
 
 
582
    >>> string_to_delta('7d')
1553
583
    datetime.timedelta(7)
1554
 
    >>> string_to_delta(u'60s')
 
584
    >>> string_to_delta('60s')
1555
585
    datetime.timedelta(0, 60)
1556
 
    >>> string_to_delta(u'60m')
 
586
    >>> string_to_delta('60m')
1557
587
    datetime.timedelta(0, 3600)
1558
 
    >>> string_to_delta(u'24h')
 
588
    >>> string_to_delta('24h')
1559
589
    datetime.timedelta(1)
1560
590
    >>> string_to_delta(u'1w')
1561
591
    datetime.timedelta(7)
1562
 
    >>> string_to_delta(u'5m 30s')
 
592
    >>> string_to_delta('5m 30s')
1563
593
    datetime.timedelta(0, 330)
1564
594
    """
1565
595
    timevalue = datetime.timedelta(0)
1578
608
            elif suffix == u"w":
1579
609
                delta = datetime.timedelta(0, 0, 0, 0, 0, 0, value)
1580
610
            else:
1581
 
                raise ValueError(u"Unknown suffix %r" % suffix)
1582
 
        except (ValueError, IndexError), e:
1583
 
            raise ValueError(e.message)
 
611
                raise ValueError
 
612
        except (ValueError, IndexError):
 
613
            raise ValueError
1584
614
        timevalue += delta
1585
615
    return timevalue
1586
616
 
1587
617
 
 
618
def server_state_changed(state):
 
619
    """Derived from the Avahi example code"""
 
620
    if state == avahi.SERVER_COLLISION:
 
621
        logger.error(u"Zeroconf server name collision")
 
622
        service.remove()
 
623
    elif state == avahi.SERVER_RUNNING:
 
624
        service.add()
 
625
 
 
626
 
 
627
def entry_group_state_changed(state, error):
 
628
    """Derived from the Avahi example code"""
 
629
    logger.debug(u"Avahi state change: %i", state)
 
630
    
 
631
    if state == avahi.ENTRY_GROUP_ESTABLISHED:
 
632
        logger.debug(u"Zeroconf service established.")
 
633
    elif state == avahi.ENTRY_GROUP_COLLISION:
 
634
        logger.warning(u"Zeroconf service name collision.")
 
635
        service.rename()
 
636
    elif state == avahi.ENTRY_GROUP_FAILURE:
 
637
        logger.critical(u"Avahi: Error in group state changed %s",
 
638
                        unicode(error))
 
639
        raise AvahiGroupError("State changed: %s", str(error))
 
640
 
1588
641
def if_nametoindex(interface):
1589
 
    """Call the C function if_nametoindex(), or equivalent
1590
 
    
1591
 
    Note: This function cannot accept a unicode string."""
 
642
    """Call the C function if_nametoindex(), or equivalent"""
1592
643
    global if_nametoindex
1593
644
    try:
1594
 
        if_nametoindex = (ctypes.cdll.LoadLibrary
1595
 
                          (ctypes.util.find_library(u"c"))
1596
 
                          .if_nametoindex)
 
645
        if_nametoindex = ctypes.cdll.LoadLibrary\
 
646
            (ctypes.util.find_library("c")).if_nametoindex
1597
647
    except (OSError, AttributeError):
1598
 
        logger.warning(u"Doing if_nametoindex the hard way")
 
648
        if "struct" not in sys.modules:
 
649
            import struct
 
650
        if "fcntl" not in sys.modules:
 
651
            import fcntl
1599
652
        def if_nametoindex(interface):
1600
653
            "Get an interface index the hard way, i.e. using fcntl()"
1601
654
            SIOCGIFINDEX = 0x8933  # From /usr/include/linux/sockios.h
1602
 
            with contextlib.closing(socket.socket()) as s:
1603
 
                ifreq = fcntl.ioctl(s, SIOCGIFINDEX,
1604
 
                                    struct.pack(str(u"16s16x"),
1605
 
                                                interface))
1606
 
            interface_index = struct.unpack(str(u"I"),
1607
 
                                            ifreq[16:20])[0]
 
655
            s = socket.socket()
 
656
            ifreq = fcntl.ioctl(s, SIOCGIFINDEX,
 
657
                                struct.pack("16s16x", interface))
 
658
            s.close()
 
659
            interface_index = struct.unpack("I", ifreq[16:20])[0]
1608
660
            return interface_index
1609
661
    return if_nametoindex(interface)
1610
662
 
1611
663
 
1612
664
def daemon(nochdir = False, noclose = False):
1613
665
    """See daemon(3).  Standard BSD Unix function.
1614
 
    
1615
666
    This should really exist as os.daemon, but it doesn't (yet)."""
1616
667
    if os.fork():
1617
668
        sys.exit()
1618
669
    os.setsid()
1619
670
    if not nochdir:
1620
 
        os.chdir(u"/")
 
671
        os.chdir("/")
1621
672
    if os.fork():
1622
673
        sys.exit()
1623
674
    if not noclose:
1625
676
        null = os.open(os.path.devnull, os.O_NOCTTY | os.O_RDWR)
1626
677
        if not stat.S_ISCHR(os.fstat(null).st_mode):
1627
678
            raise OSError(errno.ENODEV,
1628
 
                          u"%s not a character device"
1629
 
                          % os.path.devnull)
 
679
                          "/dev/null not a character device")
1630
680
        os.dup2(null, sys.stdin.fileno())
1631
681
        os.dup2(null, sys.stdout.fileno())
1632
682
        os.dup2(null, sys.stderr.fileno())
1635
685
 
1636
686
 
1637
687
def main():
1638
 
    
1639
 
    ##################################################################
1640
 
    # Parsing of options, both command line and config file
1641
 
    
1642
 
    parser = optparse.OptionParser(version = "%%prog %s" % version)
1643
 
    parser.add_option("-i", u"--interface", type=u"string",
1644
 
                      metavar="IF", help=u"Bind to interface IF")
1645
 
    parser.add_option("-a", u"--address", type=u"string",
1646
 
                      help=u"Address to listen for requests on")
1647
 
    parser.add_option("-p", u"--port", type=u"int",
1648
 
                      help=u"Port number to receive requests on")
1649
 
    parser.add_option("--check", action=u"store_true",
1650
 
                      help=u"Run self-test")
1651
 
    parser.add_option("--debug", action=u"store_true",
1652
 
                      help=u"Debug mode; run in foreground and log to"
1653
 
                      u" terminal")
1654
 
    parser.add_option("--debuglevel", type=u"string", metavar="Level",
1655
 
                      help=u"Debug level for stdout output")
1656
 
    parser.add_option("--priority", type=u"string", help=u"GnuTLS"
1657
 
                      u" priority string (see GnuTLS documentation)")
1658
 
    parser.add_option("--servicename", type=u"string",
1659
 
                      metavar=u"NAME", help=u"Zeroconf service name")
1660
 
    parser.add_option("--configdir", type=u"string",
1661
 
                      default=u"/etc/mandos", metavar=u"DIR",
1662
 
                      help=u"Directory to search for configuration"
1663
 
                      u" files")
1664
 
    parser.add_option("--no-dbus", action=u"store_false",
1665
 
                      dest=u"use_dbus", help=u"Do not provide D-Bus"
1666
 
                      u" system bus interface")
1667
 
    parser.add_option("--no-ipv6", action=u"store_false",
1668
 
                      dest=u"use_ipv6", help=u"Do not use IPv6")
 
688
    parser = OptionParser(version = "%%prog %s" % version)
 
689
    parser.add_option("-i", "--interface", type="string",
 
690
                      metavar="IF", help="Bind to interface IF")
 
691
    parser.add_option("-a", "--address", type="string",
 
692
                      help="Address to listen for requests on")
 
693
    parser.add_option("-p", "--port", type="int",
 
694
                      help="Port number to receive requests on")
 
695
    parser.add_option("--check", action="store_true", default=False,
 
696
                      help="Run self-test")
 
697
    parser.add_option("--debug", action="store_true",
 
698
                      help="Debug mode; run in foreground and log to"
 
699
                      " terminal")
 
700
    parser.add_option("--priority", type="string", help="GnuTLS"
 
701
                      " priority string (see GnuTLS documentation)")
 
702
    parser.add_option("--servicename", type="string", metavar="NAME",
 
703
                      help="Zeroconf service name")
 
704
    parser.add_option("--configdir", type="string",
 
705
                      default="/etc/mandos", metavar="DIR",
 
706
                      help="Directory to search for configuration"
 
707
                      " files")
1669
708
    options = parser.parse_args()[0]
1670
709
    
1671
710
    if options.check:
1674
713
        sys.exit()
1675
714
    
1676
715
    # Default values for config file for server-global settings
1677
 
    server_defaults = { u"interface": u"",
1678
 
                        u"address": u"",
1679
 
                        u"port": u"",
1680
 
                        u"debug": u"False",
1681
 
                        u"priority":
1682
 
                        u"SECURE256:!CTYPE-X.509:+CTYPE-OPENPGP",
1683
 
                        u"servicename": u"Mandos",
1684
 
                        u"use_dbus": u"True",
1685
 
                        u"use_ipv6": u"True",
1686
 
                        u"debuglevel": u"",
 
716
    server_defaults = { "interface": "",
 
717
                        "address": "",
 
718
                        "port": "",
 
719
                        "debug": "False",
 
720
                        "priority":
 
721
                        "SECURE256:!CTYPE-X.509:+CTYPE-OPENPGP",
 
722
                        "servicename": "Mandos",
1687
723
                        }
1688
724
    
1689
725
    # Parse config file for server-global settings
1690
 
    server_config = configparser.SafeConfigParser(server_defaults)
 
726
    server_config = ConfigParser.SafeConfigParser(server_defaults)
1691
727
    del server_defaults
1692
 
    server_config.read(os.path.join(options.configdir,
1693
 
                                    u"mandos.conf"))
 
728
    server_config.read(os.path.join(options.configdir, "mandos.conf"))
1694
729
    # Convert the SafeConfigParser object to a dict
1695
730
    server_settings = server_config.defaults()
1696
 
    # Use the appropriate methods on the non-string config options
1697
 
    for option in (u"debug", u"use_dbus", u"use_ipv6"):
1698
 
        server_settings[option] = server_config.getboolean(u"DEFAULT",
1699
 
                                                           option)
1700
 
    if server_settings["port"]:
1701
 
        server_settings["port"] = server_config.getint(u"DEFAULT",
1702
 
                                                       u"port")
 
731
    # Use getboolean on the boolean config option
 
732
    server_settings["debug"] = server_config.getboolean\
 
733
                               ("DEFAULT", "debug")
1703
734
    del server_config
1704
735
    
1705
736
    # Override the settings from the config file with command line
1706
737
    # options, if set.
1707
 
    for option in (u"interface", u"address", u"port", u"debug",
1708
 
                   u"priority", u"servicename", u"configdir",
1709
 
                   u"use_dbus", u"use_ipv6", u"debuglevel"):
 
738
    for option in ("interface", "address", "port", "debug",
 
739
                   "priority", "servicename", "configdir"):
1710
740
        value = getattr(options, option)
1711
741
        if value is not None:
1712
742
            server_settings[option] = value
1713
743
    del options
1714
 
    # Force all strings to be unicode
1715
 
    for option in server_settings.keys():
1716
 
        if type(server_settings[option]) is str:
1717
 
            server_settings[option] = unicode(server_settings[option])
1718
744
    # Now we have our good server settings in "server_settings"
1719
745
    
1720
 
    ##################################################################
1721
 
    
1722
 
    # For convenience
1723
 
    debug = server_settings[u"debug"]
1724
 
    debuglevel = server_settings[u"debuglevel"]
1725
 
    use_dbus = server_settings[u"use_dbus"]
1726
 
    use_ipv6 = server_settings[u"use_ipv6"]
1727
 
 
1728
 
    if server_settings[u"servicename"] != u"Mandos":
1729
 
        syslogger.setFormatter(logging.Formatter
1730
 
                               (u'Mandos (%s) [%%(process)d]:'
1731
 
                                u' %%(levelname)s: %%(message)s'
1732
 
                                % server_settings[u"servicename"]))
 
746
    debug = server_settings["debug"]
 
747
    
 
748
    if not debug:
 
749
        syslogger.setLevel(logging.WARNING)
 
750
        console.setLevel(logging.WARNING)
 
751
    
 
752
    if server_settings["servicename"] != "Mandos":
 
753
        syslogger.setFormatter(logging.Formatter\
 
754
                               ('Mandos (%s): %%(levelname)s:'
 
755
                                ' %%(message)s'
 
756
                                % server_settings["servicename"]))
1733
757
    
1734
758
    # Parse config file with clients
1735
 
    client_defaults = { u"timeout": u"1h",
1736
 
                        u"interval": u"5m",
1737
 
                        u"checker": u"fping -q -- %%(host)s",
1738
 
                        u"host": u"",
1739
 
                        u"approval_delay": u"0s",
1740
 
                        u"approval_duration": u"1s",
 
759
    client_defaults = { "timeout": "1h",
 
760
                        "interval": "5m",
 
761
                        "checker": "fping -q -- %(host)s",
 
762
                        "host": "",
1741
763
                        }
1742
 
    client_config = configparser.SafeConfigParser(client_defaults)
1743
 
    client_config.read(os.path.join(server_settings[u"configdir"],
1744
 
                                    u"clients.conf"))
1745
 
    
1746
 
    global mandos_dbus_service
1747
 
    mandos_dbus_service = None
1748
 
    
1749
 
    tcp_server = MandosServer((server_settings[u"address"],
1750
 
                               server_settings[u"port"]),
1751
 
                              ClientHandler,
1752
 
                              interface=(server_settings[u"interface"]
1753
 
                                         or None),
1754
 
                              use_ipv6=use_ipv6,
1755
 
                              gnutls_priority=
1756
 
                              server_settings[u"priority"],
1757
 
                              use_dbus=use_dbus)
1758
 
    pidfilename = u"/var/run/mandos.pid"
1759
 
    try:
1760
 
        pidfile = open(pidfilename, u"w")
1761
 
    except IOError:
1762
 
        logger.error(u"Could not open file %r", pidfilename)
1763
 
    
1764
 
    try:
1765
 
        uid = pwd.getpwnam(u"_mandos").pw_uid
1766
 
        gid = pwd.getpwnam(u"_mandos").pw_gid
1767
 
    except KeyError:
1768
 
        try:
1769
 
            uid = pwd.getpwnam(u"mandos").pw_uid
1770
 
            gid = pwd.getpwnam(u"mandos").pw_gid
1771
 
        except KeyError:
1772
 
            try:
1773
 
                uid = pwd.getpwnam(u"nobody").pw_uid
1774
 
                gid = pwd.getpwnam(u"nobody").pw_gid
1775
 
            except KeyError:
1776
 
                uid = 65534
1777
 
                gid = 65534
1778
 
    try:
 
764
    client_config = ConfigParser.SafeConfigParser(client_defaults)
 
765
    client_config.read(os.path.join(server_settings["configdir"],
 
766
                                    "clients.conf"))
 
767
    
 
768
    clients = Set()
 
769
    tcp_server = IPv6_TCPServer((server_settings["address"],
 
770
                                 server_settings["port"]),
 
771
                                TCP_handler,
 
772
                                settings=server_settings,
 
773
                                clients=clients)
 
774
    pidfilename = "/var/run/mandos.pid"
 
775
    try:
 
776
        pidfile = open(pidfilename, "w")
 
777
    except IOError, error:
 
778
        logger.error("Could not open file %r", pidfilename)
 
779
    
 
780
    uid = 65534
 
781
    gid = 65534
 
782
    try:
 
783
        uid = pwd.getpwnam("mandos").pw_uid
 
784
    except KeyError:
 
785
        try:
 
786
            uid = pwd.getpwnam("nobody").pw_uid
 
787
        except KeyError:
 
788
            pass
 
789
    try:
 
790
        gid = pwd.getpwnam("mandos").pw_gid
 
791
    except KeyError:
 
792
        try:
 
793
            gid = pwd.getpwnam("nogroup").pw_gid
 
794
        except KeyError:
 
795
            pass
 
796
    try:
 
797
        os.setuid(uid)
1779
798
        os.setgid(gid)
1780
 
        os.setuid(uid)
1781
799
    except OSError, error:
1782
800
        if error[0] != errno.EPERM:
1783
801
            raise error
1784
802
    
1785
 
    if not debug and not debuglevel:
1786
 
        syslogger.setLevel(logging.WARNING)
1787
 
        console.setLevel(logging.WARNING)
1788
 
    if debuglevel:
1789
 
        level = getattr(logging, debuglevel.upper())
1790
 
        syslogger.setLevel(level)
1791
 
        console.setLevel(level)
1792
 
 
1793
 
    if debug:
1794
 
        # Enable all possible GnuTLS debugging
1795
 
        
1796
 
        # "Use a log level over 10 to enable all debugging options."
1797
 
        # - GnuTLS manual
1798
 
        gnutls.library.functions.gnutls_global_set_log_level(11)
1799
 
        
1800
 
        @gnutls.library.types.gnutls_log_func
1801
 
        def debug_gnutls(level, string):
1802
 
            logger.debug(u"GnuTLS: %s", string[:-1])
1803
 
        
1804
 
        (gnutls.library.functions
1805
 
         .gnutls_global_set_log_function(debug_gnutls))
1806
 
        
1807
 
        # Redirect stdin so all checkers get /dev/null
1808
 
        null = os.open(os.path.devnull, os.O_NOCTTY | os.O_RDWR)
1809
 
        os.dup2(null, sys.stdin.fileno())
1810
 
        if null > 2:
1811
 
            os.close(null)
1812
 
    else:
1813
 
        # No console logging
1814
 
        logger.removeHandler(console)
1815
 
    
 
803
    global service
 
804
    service = AvahiService(name = server_settings["servicename"],
 
805
                           servicetype = "_mandos._tcp", )
 
806
    if server_settings["interface"]:
 
807
        service.interface = if_nametoindex\
 
808
                            (server_settings["interface"])
1816
809
    
1817
810
    global main_loop
 
811
    global bus
 
812
    global server
1818
813
    # From the Avahi example code
1819
814
    DBusGMainLoop(set_as_default=True )
1820
815
    main_loop = gobject.MainLoop()
1821
816
    bus = dbus.SystemBus()
 
817
    server = dbus.Interface(bus.get_object(avahi.DBUS_NAME,
 
818
                                           avahi.DBUS_PATH_SERVER),
 
819
                            avahi.DBUS_INTERFACE_SERVER)
1822
820
    # End of Avahi example code
1823
 
    if use_dbus:
1824
 
        try:
1825
 
            bus_name = dbus.service.BusName(u"se.bsnet.fukt.Mandos",
1826
 
                                            bus, do_not_queue=True)
1827
 
        except dbus.exceptions.NameExistsException, e:
1828
 
            logger.error(unicode(e) + u", disabling D-Bus")
1829
 
            use_dbus = False
1830
 
            server_settings[u"use_dbus"] = False
1831
 
            tcp_server.use_dbus = False
1832
 
    protocol = avahi.PROTO_INET6 if use_ipv6 else avahi.PROTO_INET
1833
 
    service = AvahiService(name = server_settings[u"servicename"],
1834
 
                           servicetype = u"_mandos._tcp",
1835
 
                           protocol = protocol, bus = bus)
1836
 
    if server_settings["interface"]:
1837
 
        service.interface = (if_nametoindex
1838
 
                             (str(server_settings[u"interface"])))
1839
 
 
1840
 
    if not debug:
 
821
    
 
822
    def remove_from_clients(client):
 
823
        clients.remove(client)
 
824
        if not clients:
 
825
            logger.critical(u"No clients left, exiting")
 
826
            sys.exit()
 
827
    
 
828
    clients.update(Set(Client(name = section,
 
829
                              stop_hook = remove_from_clients,
 
830
                              config
 
831
                              = dict(client_config.items(section)))
 
832
                       for section in client_config.sections()))
 
833
    if not clients:
 
834
        logger.critical(u"No clients defined")
 
835
        sys.exit(1)
 
836
    
 
837
    if debug:
 
838
        # Redirect stdin so all checkers get /dev/null
 
839
        null = os.open(os.path.devnull, os.O_NOCTTY | os.O_RDWR)
 
840
        os.dup2(null, sys.stdin.fileno())
 
841
        if null > 2:
 
842
            os.close(null)
 
843
    else:
 
844
        # No console logging
 
845
        logger.removeHandler(console)
1841
846
        # Close all input and output, do double fork, etc.
1842
847
        daemon()
1843
 
        
1844
 
    global multiprocessing_manager
1845
 
    multiprocessing_manager = multiprocessing.Manager()
1846
 
    
1847
 
    client_class = Client
1848
 
    if use_dbus:
1849
 
        client_class = functools.partial(ClientDBus, bus = bus)
1850
 
    def client_config_items(config, section):
1851
 
        special_settings = {
1852
 
            "approved_by_default":
1853
 
                lambda: config.getboolean(section,
1854
 
                                          "approved_by_default"),
1855
 
            }
1856
 
        for name, value in config.items(section):
1857
 
            try:
1858
 
                yield (name, special_settings[name]())
1859
 
            except KeyError:
1860
 
                yield (name, value)
1861
 
    
1862
 
    tcp_server.clients.update(set(
1863
 
            client_class(name = section,
1864
 
                         config= dict(client_config_items(
1865
 
                        client_config, section)))
1866
 
            for section in client_config.sections()))
1867
 
    if not tcp_server.clients:
1868
 
        logger.warning(u"No clients defined")
1869
 
        
 
848
    
1870
849
    try:
1871
 
        with pidfile:
1872
 
            pid = os.getpid()
1873
 
            pidfile.write(str(pid) + "\n")
 
850
        pid = os.getpid()
 
851
        pidfile.write(str(pid) + "\n")
 
852
        pidfile.close()
1874
853
        del pidfile
1875
854
    except IOError:
1876
855
        logger.error(u"Could not write to file %r with PID %d",
1880
859
        pass
1881
860
    del pidfilename
1882
861
    
 
862
    def cleanup():
 
863
        "Cleanup function; run on exit"
 
864
        global group
 
865
        # From the Avahi example code
 
866
        if not group is None:
 
867
            group.Free()
 
868
            group = None
 
869
        # End of Avahi example code
 
870
        
 
871
        while clients:
 
872
            client = clients.pop()
 
873
            client.stop_hook = None
 
874
            client.stop()
 
875
    
 
876
    atexit.register(cleanup)
 
877
    
1883
878
    if not debug:
1884
879
        signal.signal(signal.SIGINT, signal.SIG_IGN)
1885
880
    signal.signal(signal.SIGHUP, lambda signum, frame: sys.exit())
1886
881
    signal.signal(signal.SIGTERM, lambda signum, frame: sys.exit())
1887
882
    
1888
 
    if use_dbus:
1889
 
        class MandosDBusService(dbus.service.Object):
1890
 
            """A D-Bus proxy object"""
1891
 
            def __init__(self):
1892
 
                dbus.service.Object.__init__(self, bus, u"/")
1893
 
            _interface = u"se.bsnet.fukt.Mandos"
1894
 
            
1895
 
            @dbus.service.signal(_interface, signature=u"o")
1896
 
            def ClientAdded(self, objpath):
1897
 
                "D-Bus signal"
1898
 
                pass
1899
 
            
1900
 
            @dbus.service.signal(_interface, signature=u"ss")
1901
 
            def ClientNotFound(self, fingerprint, address):
1902
 
                "D-Bus signal"
1903
 
                pass
1904
 
            
1905
 
            @dbus.service.signal(_interface, signature=u"os")
1906
 
            def ClientRemoved(self, objpath, name):
1907
 
                "D-Bus signal"
1908
 
                pass
1909
 
            
1910
 
            @dbus.service.method(_interface, out_signature=u"ao")
1911
 
            def GetAllClients(self):
1912
 
                "D-Bus method"
1913
 
                return dbus.Array(c.dbus_object_path
1914
 
                                  for c in tcp_server.clients)
1915
 
            
1916
 
            @dbus.service.method(_interface,
1917
 
                                 out_signature=u"a{oa{sv}}")
1918
 
            def GetAllClientsWithProperties(self):
1919
 
                "D-Bus method"
1920
 
                return dbus.Dictionary(
1921
 
                    ((c.dbus_object_path, c.GetAll(u""))
1922
 
                     for c in tcp_server.clients),
1923
 
                    signature=u"oa{sv}")
1924
 
            
1925
 
            @dbus.service.method(_interface, in_signature=u"o")
1926
 
            def RemoveClient(self, object_path):
1927
 
                "D-Bus method"
1928
 
                for c in tcp_server.clients:
1929
 
                    if c.dbus_object_path == object_path:
1930
 
                        tcp_server.clients.remove(c)
1931
 
                        c.remove_from_connection()
1932
 
                        # Don't signal anything except ClientRemoved
1933
 
                        c.disable(quiet=True)
1934
 
                        # Emit D-Bus signal
1935
 
                        self.ClientRemoved(object_path, c.name)
1936
 
                        return
1937
 
                raise KeyError(object_path)
1938
 
            
1939
 
            del _interface
1940
 
        
1941
 
        mandos_dbus_service = MandosDBusService()
1942
 
    
1943
 
    def cleanup():
1944
 
        "Cleanup function; run on exit"
1945
 
        service.cleanup()
1946
 
        
1947
 
        while tcp_server.clients:
1948
 
            client = tcp_server.clients.pop()
1949
 
            if use_dbus:
1950
 
                client.remove_from_connection()
1951
 
            client.disable_hook = None
1952
 
            # Don't signal anything except ClientRemoved
1953
 
            client.disable(quiet=True)
1954
 
            if use_dbus:
1955
 
                # Emit D-Bus signal
1956
 
                mandos_dbus_service.ClientRemoved(client.dbus_object_path,
1957
 
                                                  client.name)
1958
 
    
1959
 
    atexit.register(cleanup)
1960
 
    
1961
 
    for client in tcp_server.clients:
1962
 
        if use_dbus:
1963
 
            # Emit D-Bus signal
1964
 
            mandos_dbus_service.ClientAdded(client.dbus_object_path)
1965
 
        client.enable()
 
883
    for client in clients:
 
884
        client.start()
1966
885
    
1967
886
    tcp_server.enable()
1968
887
    tcp_server.server_activate()
1969
888
    
1970
889
    # Find out what port we got
1971
890
    service.port = tcp_server.socket.getsockname()[1]
1972
 
    if use_ipv6:
1973
 
        logger.info(u"Now listening on address %r, port %d,"
1974
 
                    " flowinfo %d, scope_id %d"
1975
 
                    % tcp_server.socket.getsockname())
1976
 
    else:                       # IPv4
1977
 
        logger.info(u"Now listening on address %r, port %d"
1978
 
                    % tcp_server.socket.getsockname())
 
891
    logger.info(u"Now listening on address %r, port %d, flowinfo %d,"
 
892
                u" scope_id %d" % tcp_server.socket.getsockname())
1979
893
    
1980
894
    #service.interface = tcp_server.socket.getsockname()[3]
1981
895
    
1982
896
    try:
1983
897
        # From the Avahi example code
 
898
        server.connect_to_signal("StateChanged", server_state_changed)
1984
899
        try:
1985
 
            service.activate()
 
900
            server_state_changed(server.GetState())
1986
901
        except dbus.exceptions.DBusException, error:
1987
902
            logger.critical(u"DBusException: %s", error)
1988
 
            cleanup()
1989
903
            sys.exit(1)
1990
904
        # End of Avahi example code
1991
905
        
1992
906
        gobject.io_add_watch(tcp_server.fileno(), gobject.IO_IN,
1993
907
                             lambda *args, **kwargs:
1994
 
                             (tcp_server.handle_request
1995
 
                              (*args[2:], **kwargs) or True))
 
908
                             tcp_server.handle_request\
 
909
                             (*args[2:], **kwargs) or True)
1996
910
        
1997
911
        logger.debug(u"Starting main loop")
1998
912
        main_loop.run()
1999
913
    except AvahiError, error:
2000
 
        logger.critical(u"AvahiError: %s", error)
2001
 
        cleanup()
 
914
        logger.critical(u"AvahiError: %s" + unicode(error))
2002
915
        sys.exit(1)
2003
916
    except KeyboardInterrupt:
2004
917
        if debug:
2005
 
            print >> sys.stderr
2006
 
        logger.debug(u"Server received KeyboardInterrupt")
2007
 
    logger.debug(u"Server exiting")
2008
 
    # Must run before the D-Bus bus name gets deregistered
2009
 
    cleanup()
 
918
            print
2010
919
 
2011
920
if __name__ == '__main__':
2012
921
    main()