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  • Committer: Teddy Hogeborn
  • Date: 2008-08-01 06:33:15 UTC
  • Revision ID: teddy@fukt.bsnet.se-20080801063315-4k33q3ek28hjc3tu
* plugins.d/plugbasedclient.c: Update include file comments.
  (struct process.disable): Renamed to "disabled".  All users changed.
  (addarguments): Renamed to "addargument".  All callers changed.
  (doc, args_doc): Removed.
  (main): Changed default "plugindir" to
          "/conf/conf.d/mandos/plugins.d".  Renamed "rfds_orig" to
           "rfds_all"; all users changed.  New "debug" and
           "exitstatus" variables.  New "--debug" option.  Removed
           unnecessary ".flags = 0" from all options.  Changed so that
           "--disable-plugin" only takes one plugin.  Check for
           non-existence of ":" in argument to "--options-for".  Added
           some debugging outputs.  Set the FD_CLOEXEC flag on the
           directory FD.  More capable code for dealing with
           disallowed plugin file name prefixes and suffixes.  Bug
           fix: check for some malloc failures.  Moved allocating the
           "struct process *new_process" to after the fork.  Do
           _exit() instead of exit() in the child.

* plugins.d/mandosclient.c: Updated contact information.

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Lines of Context:
server.py
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# This program is partly derived from an example program for an Avahi
7
7
# service publisher, downloaded from
8
8
# <http://avahi.org/wiki/PythonPublishExample>.  This includes the
9
 
# methods "add" and "remove" in the "AvahiService" class, the
10
 
# "server_state_changed" and "entry_group_state_changed" functions,
11
 
# and some lines in "main".
 
9
# following functions: "AvahiService.add", "AvahiService.remove",
 
10
# "server_state_changed", "entry_group_state_changed", and some lines
 
11
# in "main".
12
12
# 
13
13
# Everything else is
14
 
# Copyright © 2008,2009 Teddy Hogeborn
15
 
# Copyright © 2008,2009 Björn Påhlsson
 
14
# Copyright © 2007-2008 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
25
24
#     GNU General Public License for more details.
26
25
# 
27
26
# You should have received a copy of the GNU General Public License
28
 
# along with this program.  If not, see
29
 
# <http://www.gnu.org/licenses/>.
 
27
# along with this program.  If not, see <http://www.gnu.org/licenses/>.
30
28
# 
31
29
# Contact the authors at <mandos@fukt.bsnet.se>.
32
30
# 
33
31
 
34
 
from __future__ import division, with_statement, absolute_import
 
32
from __future__ import division
35
33
 
36
34
import SocketServer
37
35
import socket
38
 
import optparse
 
36
import select
 
37
from optparse import OptionParser
39
38
import datetime
40
39
import errno
41
40
import gnutls.crypto
55
54
import stat
56
55
import logging
57
56
import logging.handlers
58
 
import pwd
59
 
from contextlib import closing
60
57
 
61
58
import dbus
62
 
import dbus.service
63
59
import gobject
64
60
import avahi
65
61
from dbus.mainloop.glib import DBusGMainLoop
66
62
import ctypes
67
 
import ctypes.util
68
 
 
69
 
try:
70
 
    SO_BINDTODEVICE = socket.SO_BINDTODEVICE
71
 
except AttributeError:
72
 
    try:
73
 
        from IN import SO_BINDTODEVICE
74
 
    except ImportError:
75
 
        # From /usr/include/asm/socket.h
76
 
        SO_BINDTODEVICE = 25
77
 
 
78
 
 
79
 
version = "1.0.8"
 
63
 
 
64
# Brief description of the operation of this program:
 
65
# 
 
66
# This server announces itself as a Zeroconf service.  Connecting
 
67
# clients use the TLS protocol, with the unusual quirk that this
 
68
# server program acts as a TLS "client" while a connecting client acts
 
69
# as a TLS "server".  The client (acting as a TLS "server") must
 
70
# supply an OpenPGP certificate, and the fingerprint of this
 
71
# certificate is used by this server to look up (in a list read from a
 
72
# file at start time) which binary blob to give the client.  No other
 
73
# authentication or authorization is done by this server.
 
74
 
80
75
 
81
76
logger = logging.Logger('mandos')
82
 
syslogger = (logging.handlers.SysLogHandler
83
 
             (facility = logging.handlers.SysLogHandler.LOG_DAEMON,
84
 
              address = "/dev/log"))
85
 
syslogger.setFormatter(logging.Formatter
86
 
                       ('Mandos [%(process)d]: %(levelname)s:'
87
 
                        ' %(message)s'))
 
77
syslogger = logging.handlers.SysLogHandler\
 
78
            (facility = logging.handlers.SysLogHandler.LOG_DAEMON)
 
79
syslogger.setFormatter(logging.Formatter\
 
80
                        ('%(levelname)s: %(message)s'))
88
81
logger.addHandler(syslogger)
 
82
del syslogger
89
83
 
90
 
console = logging.StreamHandler()
91
 
console.setFormatter(logging.Formatter('%(name)s [%(process)d]:'
92
 
                                       ' %(levelname)s: %(message)s'))
93
 
logger.addHandler(console)
94
84
 
95
85
class AvahiError(Exception):
96
 
    def __init__(self, value, *args, **kwargs):
 
86
    def __init__(self, value):
97
87
        self.value = value
98
 
        super(AvahiError, self).__init__(value, *args, **kwargs)
99
 
    def __unicode__(self):
100
 
        return unicode(repr(self.value))
 
88
    def __str__(self):
 
89
        return repr(self.value)
101
90
 
102
91
class AvahiServiceError(AvahiError):
103
92
    pass
107
96
 
108
97
 
109
98
class AvahiService(object):
110
 
    """An Avahi (Zeroconf) service.
111
 
    
112
 
    Attributes:
 
99
    """
113
100
    interface: integer; avahi.IF_UNSPEC or an interface index.
114
101
               Used to optionally bind to the specified interface.
115
 
    name: string; Example: 'Mandos'
116
 
    type: string; Example: '_mandos._tcp'.
117
 
                  See <http://www.dns-sd.org/ServiceTypes.html>
118
 
    port: integer; what port to announce
119
 
    TXT: list of strings; TXT record for the service
120
 
    domain: string; Domain to publish on, default to .local if empty.
121
 
    host: string; Host to publish records for, default is localhost
122
 
    max_renames: integer; maximum number of renames
123
 
    rename_count: integer; counter so we only rename after collisions
124
 
                  a sensible number of times
 
102
    name = string; Example: "Mandos"
 
103
    type = string; Example: "_mandos._tcp".
 
104
                   See <http://www.dns-sd.org/ServiceTypes.html>
 
105
    port = integer; what port to announce
 
106
    TXT = list of strings; TXT record for the service
 
107
    domain = string; Domain to publish on, default to .local if empty.
 
108
    host = string; Host to publish records for, default to localhost
 
109
                   if empty.
 
110
    max_renames = integer; maximum number of renames
 
111
    rename_count = integer; counter so we only rename after collisions
 
112
                   a sensible number of times
125
113
    """
126
114
    def __init__(self, interface = avahi.IF_UNSPEC, name = None,
127
 
                 servicetype = None, port = None, TXT = None,
128
 
                 domain = "", host = "", max_renames = 32768,
129
 
                 protocol = avahi.PROTO_UNSPEC):
 
115
                 type = None, port = None, TXT = None, domain = "",
 
116
                 host = "", max_renames = 12):
 
117
        """An Avahi (Zeroconf) service. """
130
118
        self.interface = interface
131
119
        self.name = name
132
 
        self.type = servicetype
 
120
        self.type = type
133
121
        self.port = port
134
 
        self.TXT = TXT if TXT is not None else []
 
122
        if TXT is None:
 
123
            self.TXT = []
 
124
        else:
 
125
            self.TXT = TXT
135
126
        self.domain = domain
136
127
        self.host = host
137
128
        self.rename_count = 0
138
 
        self.max_renames = max_renames
139
 
        self.protocol = protocol
140
129
    def rename(self):
141
130
        """Derived from the Avahi example code"""
142
131
        if self.rename_count >= self.max_renames:
143
 
            logger.critical(u"No suitable Zeroconf service name found"
144
 
                            u" after %i retries, exiting.",
145
 
                            self.rename_count)
146
 
            raise AvahiServiceError(u"Too many renames")
147
 
        self.name = server.GetAlternativeServiceName(self.name)
148
 
        logger.info(u"Changing Zeroconf service name to %r ...",
149
 
                    str(self.name))
150
 
        syslogger.setFormatter(logging.Formatter
151
 
                               ('Mandos (%s) [%%(process)d]:'
152
 
                                ' %%(levelname)s: %%(message)s'
153
 
                                % self.name))
 
132
            logger.critical(u"No suitable service name found after %i"
 
133
                            u" retries, exiting.", rename_count)
 
134
            raise AvahiServiceError("Too many renames")
 
135
        name = server.GetAlternativeServiceName(name)
 
136
        logger.notice(u"Changing name to %r ...", name)
154
137
        self.remove()
155
138
        self.add()
156
139
        self.rename_count += 1
162
145
        """Derived from the Avahi example code"""
163
146
        global group
164
147
        if group is None:
165
 
            group = dbus.Interface(bus.get_object
166
 
                                   (avahi.DBUS_NAME,
 
148
            group = dbus.Interface\
 
149
                    (bus.get_object(avahi.DBUS_NAME,
167
150
                                    server.EntryGroupNew()),
168
 
                                   avahi.DBUS_INTERFACE_ENTRY_GROUP)
 
151
                     avahi.DBUS_INTERFACE_ENTRY_GROUP)
169
152
            group.connect_to_signal('StateChanged',
170
153
                                    entry_group_state_changed)
171
 
        logger.debug(u"Adding Zeroconf service '%s' of type '%s' ...",
 
154
        logger.debug(u"Adding service '%s' of type '%s' ...",
172
155
                     service.name, service.type)
173
156
        group.AddService(
174
157
                self.interface,         # interface
175
 
                self.protocol,          # protocol
 
158
                avahi.PROTO_INET6,      # protocol
176
159
                dbus.UInt32(0),         # flags
177
160
                self.name, self.type,
178
161
                self.domain, self.host,
185
168
# End of Avahi example code
186
169
 
187
170
 
188
 
def _datetime_to_dbus(dt, variant_level=0):
189
 
    """Convert a UTC datetime.datetime() to a D-Bus type."""
190
 
    return dbus.String(dt.isoformat(), variant_level=variant_level)
191
 
 
192
 
 
193
171
class Client(object):
194
172
    """A representation of a client host served by this server.
195
 
    
196
173
    Attributes:
197
 
    name:       string; from the config file, used in log messages and
198
 
                        D-Bus identifiers
 
174
    name:      string; from the config file, used in log messages
199
175
    fingerprint: string (40 or 32 hexadecimal digits); used to
200
176
                 uniquely identify the client
201
 
    secret:     bytestring; sent verbatim (over TLS) to client
202
 
    host:       string; available for use by the checker command
203
 
    created:    datetime.datetime(); (UTC) object creation
204
 
    last_enabled: datetime.datetime(); (UTC)
205
 
    enabled:    bool()
206
 
    last_checked_ok: datetime.datetime(); (UTC) or None
207
 
    timeout:    datetime.timedelta(); How long from last_checked_ok
208
 
                                      until this client is invalid
209
 
    interval:   datetime.timedelta(); How often to start a new checker
210
 
    disable_hook:  If set, called by disable() as disable_hook(self)
211
 
    checker:    subprocess.Popen(); a running checker process used
212
 
                                    to see if the client lives.
213
 
                                    'None' if no process is running.
 
177
    secret:    bytestring; sent verbatim (over TLS) to client
 
178
    fqdn:      string (FQDN); available for use by the checker command
 
179
    created:   datetime.datetime(); object creation, not client host
 
180
    last_checked_ok: datetime.datetime() or None if not yet checked OK
 
181
    timeout:   datetime.timedelta(); How long from last_checked_ok
 
182
                                     until this client is invalid
 
183
    interval:  datetime.timedelta(); How often to start a new checker
 
184
    stop_hook: If set, called by stop() as stop_hook(self)
 
185
    checker:   subprocess.Popen(); a running checker process used
 
186
                                   to see if the client lives.
 
187
                                   'None' if no process is running.
214
188
    checker_initiator_tag: a gobject event source tag, or None
215
 
    disable_initiator_tag:    - '' -
 
189
    stop_initiator_tag:    - '' -
216
190
    checker_callback_tag:  - '' -
217
191
    checker_command: string; External command which is run to check if
218
192
                     client lives.  %() expansions are done at
219
193
                     runtime with vars(self) as dict, so that for
220
194
                     instance %(name)s can be used in the command.
221
 
    current_checker_command: string; current running checker_command
 
195
    Private attibutes:
 
196
    _timeout: Real variable for 'timeout'
 
197
    _interval: Real variable for 'interval'
 
198
    _timeout_milliseconds: Used when calling gobject.timeout_add()
 
199
    _interval_milliseconds: - '' -
222
200
    """
223
 
    def timeout_milliseconds(self):
224
 
        "Return the 'timeout' attribute in milliseconds"
225
 
        return ((self.timeout.days * 24 * 60 * 60 * 1000)
226
 
                + (self.timeout.seconds * 1000)
227
 
                + (self.timeout.microseconds // 1000))
228
 
    
229
 
    def interval_milliseconds(self):
230
 
        "Return the 'interval' attribute in milliseconds"
231
 
        return ((self.interval.days * 24 * 60 * 60 * 1000)
232
 
                + (self.interval.seconds * 1000)
233
 
                + (self.interval.microseconds // 1000))
234
 
    
235
 
    def __init__(self, name = None, disable_hook=None, config=None):
236
 
        """Note: the 'checker' key in 'config' sets the
237
 
        'checker_command' attribute and *not* the 'checker'
238
 
        attribute."""
 
201
    def _set_timeout(self, timeout):
 
202
        "Setter function for 'timeout' attribute"
 
203
        self._timeout = timeout
 
204
        self._timeout_milliseconds = ((self.timeout.days
 
205
                                       * 24 * 60 * 60 * 1000)
 
206
                                      + (self.timeout.seconds * 1000)
 
207
                                      + (self.timeout.microseconds
 
208
                                         // 1000))
 
209
    timeout = property(lambda self: self._timeout,
 
210
                       _set_timeout)
 
211
    del _set_timeout
 
212
    def _set_interval(self, interval):
 
213
        "Setter function for 'interval' attribute"
 
214
        self._interval = interval
 
215
        self._interval_milliseconds = ((self.interval.days
 
216
                                        * 24 * 60 * 60 * 1000)
 
217
                                       + (self.interval.seconds
 
218
                                          * 1000)
 
219
                                       + (self.interval.microseconds
 
220
                                          // 1000))
 
221
    interval = property(lambda self: self._interval,
 
222
                        _set_interval)
 
223
    del _set_interval
 
224
    def __init__(self, name=None, stop_hook=None, fingerprint=None,
 
225
                 secret=None, secfile=None, fqdn=None, timeout=None,
 
226
                 interval=-1, checker=None):
 
227
        """Note: the 'checker' argument sets the 'checker_command'
 
228
        attribute and not the 'checker' attribute.."""
239
229
        self.name = name
240
 
        if config is None:
241
 
            config = {}
242
230
        logger.debug(u"Creating client %r", self.name)
243
 
        # Uppercase and remove spaces from fingerprint for later
244
 
        # comparison purposes with return value from the fingerprint()
245
 
        # function
246
 
        self.fingerprint = (config["fingerprint"].upper()
247
 
                            .replace(u" ", u""))
 
231
        # Uppercase and remove spaces from fingerprint
 
232
        # for later comparison purposes with return value of
 
233
        # the fingerprint() function
 
234
        self.fingerprint = fingerprint.upper().replace(u" ", u"")
248
235
        logger.debug(u"  Fingerprint: %s", self.fingerprint)
249
 
        if "secret" in config:
250
 
            self.secret = config["secret"].decode(u"base64")
251
 
        elif "secfile" in config:
252
 
            with closing(open(os.path.expanduser
253
 
                              (os.path.expandvars
254
 
                               (config["secfile"])))) as secfile:
255
 
                self.secret = secfile.read()
 
236
        if secret:
 
237
            self.secret = secret.decode(u"base64")
 
238
        elif secfile:
 
239
            sf = open(secfile)
 
240
            self.secret = sf.read()
 
241
            sf.close()
256
242
        else:
257
243
            raise TypeError(u"No secret or secfile for client %s"
258
244
                            % self.name)
259
 
        self.host = config.get("host", "")
260
 
        self.created = datetime.datetime.utcnow()
261
 
        self.enabled = False
262
 
        self.last_enabled = None
 
245
        self.fqdn = fqdn
 
246
        self.created = datetime.datetime.now()
263
247
        self.last_checked_ok = None
264
 
        self.timeout = string_to_delta(config["timeout"])
265
 
        self.interval = string_to_delta(config["interval"])
266
 
        self.disable_hook = disable_hook
 
248
        self.timeout = string_to_delta(timeout)
 
249
        self.interval = string_to_delta(interval)
 
250
        self.stop_hook = stop_hook
267
251
        self.checker = None
268
252
        self.checker_initiator_tag = None
269
 
        self.disable_initiator_tag = None
 
253
        self.stop_initiator_tag = None
270
254
        self.checker_callback_tag = None
271
 
        self.checker_command = config["checker"]
272
 
        self.current_checker_command = None
273
 
        self.last_connect = None
274
 
    
275
 
    def enable(self):
 
255
        self.check_command = checker
 
256
    def start(self):
276
257
        """Start this client's checker and timeout hooks"""
277
 
        self.last_enabled = datetime.datetime.utcnow()
278
258
        # Schedule a new checker to be started an 'interval' from now,
279
259
        # and every interval from then on.
280
 
        self.checker_initiator_tag = (gobject.timeout_add
281
 
                                      (self.interval_milliseconds(),
282
 
                                       self.start_checker))
 
260
        self.checker_initiator_tag = gobject.timeout_add\
 
261
                                     (self._interval_milliseconds,
 
262
                                      self.start_checker)
283
263
        # Also start a new checker *right now*.
284
264
        self.start_checker()
285
 
        # Schedule a disable() when 'timeout' has passed
286
 
        self.disable_initiator_tag = (gobject.timeout_add
287
 
                                   (self.timeout_milliseconds(),
288
 
                                    self.disable))
289
 
        self.enabled = True
290
 
    
291
 
    def disable(self):
292
 
        """Disable this client."""
293
 
        if not getattr(self, "enabled", False):
 
265
        # Schedule a stop() when 'timeout' has passed
 
266
        self.stop_initiator_tag = gobject.timeout_add\
 
267
                                  (self._timeout_milliseconds,
 
268
                                   self.stop)
 
269
    def stop(self):
 
270
        """Stop this client.
 
271
        The possibility that a client might be restarted is left open,
 
272
        but not currently used."""
 
273
        # If this client doesn't have a secret, it is already stopped.
 
274
        if self.secret:
 
275
            logger.debug(u"Stopping client %s", self.name)
 
276
            self.secret = None
 
277
        else:
294
278
            return False
295
 
        logger.info(u"Disabling client %s", self.name)
296
 
        if getattr(self, "disable_initiator_tag", False):
297
 
            gobject.source_remove(self.disable_initiator_tag)
298
 
            self.disable_initiator_tag = None
 
279
        if getattr(self, "stop_initiator_tag", False):
 
280
            gobject.source_remove(self.stop_initiator_tag)
 
281
            self.stop_initiator_tag = None
299
282
        if getattr(self, "checker_initiator_tag", False):
300
283
            gobject.source_remove(self.checker_initiator_tag)
301
284
            self.checker_initiator_tag = None
302
285
        self.stop_checker()
303
 
        if self.disable_hook:
304
 
            self.disable_hook(self)
305
 
        self.enabled = False
 
286
        if self.stop_hook:
 
287
            self.stop_hook(self)
306
288
        # Do not run this again if called by a gobject.timeout_add
307
289
        return False
308
 
    
309
290
    def __del__(self):
310
 
        self.disable_hook = None
311
 
        self.disable()
312
 
    
313
 
    def checker_callback(self, pid, condition, command):
 
291
        self.stop_hook = None
 
292
        self.stop()
 
293
    def checker_callback(self, pid, condition):
314
294
        """The checker has completed, so take appropriate actions."""
 
295
        now = datetime.datetime.now()
315
296
        self.checker_callback_tag = None
316
297
        self.checker = None
317
 
        if os.WIFEXITED(condition):
318
 
            exitstatus = os.WEXITSTATUS(condition)
319
 
            if exitstatus == 0:
320
 
                logger.info(u"Checker for %(name)s succeeded",
321
 
                            vars(self))
322
 
                self.checked_ok()
323
 
            else:
324
 
                logger.info(u"Checker for %(name)s failed",
325
 
                            vars(self))
326
 
        else:
 
298
        if os.WIFEXITED(condition) \
 
299
               and (os.WEXITSTATUS(condition) == 0):
 
300
            logger.debug(u"Checker for %(name)s succeeded",
 
301
                         vars(self))
 
302
            self.last_checked_ok = now
 
303
            gobject.source_remove(self.stop_initiator_tag)
 
304
            self.stop_initiator_tag = gobject.timeout_add\
 
305
                                      (self._timeout_milliseconds,
 
306
                                       self.stop)
 
307
        elif not os.WIFEXITED(condition):
327
308
            logger.warning(u"Checker for %(name)s crashed?",
328
309
                           vars(self))
329
 
    
330
 
    def checked_ok(self):
331
 
        """Bump up the timeout for this client.
332
 
        
333
 
        This should only be called when the client has been seen,
334
 
        alive and well.
335
 
        """
336
 
        self.last_checked_ok = datetime.datetime.utcnow()
337
 
        gobject.source_remove(self.disable_initiator_tag)
338
 
        self.disable_initiator_tag = (gobject.timeout_add
339
 
                                      (self.timeout_milliseconds(),
340
 
                                       self.disable))
341
 
    
 
310
        else:
 
311
            logger.debug(u"Checker for %(name)s failed",
 
312
                         vars(self))
342
313
    def start_checker(self):
343
314
        """Start a new checker subprocess if one is not running.
344
 
        
345
315
        If a checker already exists, leave it running and do
346
316
        nothing."""
347
317
        # The reason for not killing a running checker is that if we
352
322
        # checkers alone, the checker would have to take more time
353
323
        # than 'timeout' for the client to be declared invalid, which
354
324
        # is as it should be.
355
 
        
356
 
        # If a checker exists, make sure it is not a zombie
357
 
        if self.checker is not None:
358
 
            pid, status = os.waitpid(self.checker.pid, os.WNOHANG)
359
 
            if pid:
360
 
                logger.warning("Checker was a zombie")
361
 
                gobject.source_remove(self.checker_callback_tag)
362
 
                self.checker_callback(pid, status,
363
 
                                      self.current_checker_command)
364
 
        # Start a new checker if needed
365
325
        if self.checker is None:
366
326
            try:
367
 
                # In case checker_command has exactly one % operator
368
 
                command = self.checker_command % self.host
 
327
                # In case check_command has exactly one % operator
 
328
                command = self.check_command % self.fqdn
369
329
            except TypeError:
370
330
                # Escape attributes for the shell
371
331
                escaped_attrs = dict((key, re.escape(str(val)))
372
332
                                     for key, val in
373
333
                                     vars(self).iteritems())
374
334
                try:
375
 
                    command = self.checker_command % escaped_attrs
 
335
                    command = self.check_command % escaped_attrs
376
336
                except TypeError, error:
377
337
                    logger.error(u'Could not format string "%s":'
378
 
                                 u' %s', self.checker_command, error)
 
338
                                 u' %s', self.check_command, error)
379
339
                    return True # Try again later
380
 
            self.current_checker_command = command
381
340
            try:
382
 
                logger.info(u"Starting checker %r for %s",
383
 
                            command, self.name)
384
 
                # We don't need to redirect stdout and stderr, since
385
 
                # in normal mode, that is already done by daemon(),
386
 
                # and in debug mode we don't want to.  (Stdin is
387
 
                # always replaced by /dev/null.)
 
341
                logger.debug(u"Starting checker %r for %s",
 
342
                             command, self.name)
388
343
                self.checker = subprocess.Popen(command,
389
344
                                                close_fds=True,
390
345
                                                shell=True, cwd="/")
391
 
                self.checker_callback_tag = (gobject.child_watch_add
392
 
                                             (self.checker.pid,
393
 
                                              self.checker_callback,
394
 
                                              data=command))
395
 
                # The checker may have completed before the gobject
396
 
                # watch was added.  Check for this.
397
 
                pid, status = os.waitpid(self.checker.pid, os.WNOHANG)
398
 
                if pid:
399
 
                    gobject.source_remove(self.checker_callback_tag)
400
 
                    self.checker_callback(pid, status, command)
401
 
            except OSError, error:
 
346
                self.checker_callback_tag = gobject.child_watch_add\
 
347
                                            (self.checker.pid,
 
348
                                             self.checker_callback)
 
349
            except subprocess.OSError, error:
402
350
                logger.error(u"Failed to start subprocess: %s",
403
351
                             error)
404
352
        # Re-run this periodically if run by gobject.timeout_add
405
353
        return True
406
 
    
407
354
    def stop_checker(self):
408
355
        """Force the checker process, if any, to stop."""
409
356
        if self.checker_callback_tag:
411
358
            self.checker_callback_tag = None
412
359
        if getattr(self, "checker", None) is None:
413
360
            return
414
 
        logger.debug(u"Stopping checker for %(name)s", vars(self))
 
361
        logger.debug("Stopping checker for %(name)s", vars(self))
415
362
        try:
416
363
            os.kill(self.checker.pid, signal.SIGTERM)
417
364
            #os.sleep(0.5)
421
368
            if error.errno != errno.ESRCH: # No such process
422
369
                raise
423
370
        self.checker = None
424
 
    
425
371
    def still_valid(self):
426
372
        """Has the timeout not yet passed for this client?"""
427
 
        if not getattr(self, "enabled", False):
428
 
            return False
429
 
        now = datetime.datetime.utcnow()
 
373
        now = datetime.datetime.now()
430
374
        if self.last_checked_ok is None:
431
375
            return now < (self.created + self.timeout)
432
376
        else:
433
377
            return now < (self.last_checked_ok + self.timeout)
434
378
 
435
379
 
436
 
class ClientDBus(Client, dbus.service.Object):
437
 
    """A Client class using D-Bus
438
 
    
439
 
    Attributes:
440
 
    dbus_object_path: dbus.ObjectPath ; only set if self.use_dbus
441
 
    """
442
 
    # dbus.service.Object doesn't use super(), so we can't either.
443
 
    
444
 
    def __init__(self, *args, **kwargs):
445
 
        Client.__init__(self, *args, **kwargs)
446
 
        # Only now, when this client is initialized, can it show up on
447
 
        # the D-Bus
448
 
        self.dbus_object_path = (dbus.ObjectPath
449
 
                                 ("/clients/"
450
 
                                  + self.name.replace(".", "_")))
451
 
        dbus.service.Object.__init__(self, bus,
452
 
                                     self.dbus_object_path)
453
 
    def enable(self):
454
 
        oldstate = getattr(self, "enabled", False)
455
 
        r = Client.enable(self)
456
 
        if oldstate != self.enabled:
457
 
            # Emit D-Bus signals
458
 
            self.PropertyChanged(dbus.String(u"enabled"),
459
 
                                 dbus.Boolean(True, variant_level=1))
460
 
            self.PropertyChanged(dbus.String(u"last_enabled"),
461
 
                                 (_datetime_to_dbus(self.last_enabled,
462
 
                                                    variant_level=1)))
463
 
        return r
464
 
    
465
 
    def disable(self, signal = True):
466
 
        oldstate = getattr(self, "enabled", False)
467
 
        r = Client.disable(self)
468
 
        if signal and oldstate != self.enabled:
469
 
            # Emit D-Bus signal
470
 
            self.PropertyChanged(dbus.String(u"enabled"),
471
 
                                 dbus.Boolean(False, variant_level=1))
472
 
        return r
473
 
    
474
 
    def __del__(self, *args, **kwargs):
475
 
        try:
476
 
            self.remove_from_connection()
477
 
        except LookupError:
478
 
            pass
479
 
        if hasattr(dbus.service.Object, "__del__"):
480
 
            dbus.service.Object.__del__(self, *args, **kwargs)
481
 
        Client.__del__(self, *args, **kwargs)
482
 
    
483
 
    def checker_callback(self, pid, condition, command,
484
 
                         *args, **kwargs):
485
 
        self.checker_callback_tag = None
486
 
        self.checker = None
487
 
        # Emit D-Bus signal
488
 
        self.PropertyChanged(dbus.String(u"checker_running"),
489
 
                             dbus.Boolean(False, variant_level=1))
490
 
        if os.WIFEXITED(condition):
491
 
            exitstatus = os.WEXITSTATUS(condition)
492
 
            # Emit D-Bus signal
493
 
            self.CheckerCompleted(dbus.Int16(exitstatus),
494
 
                                  dbus.Int64(condition),
495
 
                                  dbus.String(command))
496
 
        else:
497
 
            # Emit D-Bus signal
498
 
            self.CheckerCompleted(dbus.Int16(-1),
499
 
                                  dbus.Int64(condition),
500
 
                                  dbus.String(command))
501
 
        
502
 
        return Client.checker_callback(self, pid, condition, command,
503
 
                                       *args, **kwargs)
504
 
    
505
 
    def checked_ok(self, *args, **kwargs):
506
 
        r = Client.checked_ok(self, *args, **kwargs)
507
 
        # Emit D-Bus signal
508
 
        self.PropertyChanged(
509
 
            dbus.String(u"last_checked_ok"),
510
 
            (_datetime_to_dbus(self.last_checked_ok,
511
 
                               variant_level=1)))
512
 
        return r
513
 
    
514
 
    def start_checker(self, *args, **kwargs):
515
 
        old_checker = self.checker
516
 
        if self.checker is not None:
517
 
            old_checker_pid = self.checker.pid
518
 
        else:
519
 
            old_checker_pid = None
520
 
        r = Client.start_checker(self, *args, **kwargs)
521
 
        # Only if new checker process was started
522
 
        if (self.checker is not None
523
 
            and old_checker_pid != self.checker.pid):
524
 
            # Emit D-Bus signal
525
 
            self.CheckerStarted(self.current_checker_command)
526
 
            self.PropertyChanged(
527
 
                dbus.String("checker_running"),
528
 
                dbus.Boolean(True, variant_level=1))
529
 
        return r
530
 
    
531
 
    def stop_checker(self, *args, **kwargs):
532
 
        old_checker = getattr(self, "checker", None)
533
 
        r = Client.stop_checker(self, *args, **kwargs)
534
 
        if (old_checker is not None
535
 
            and getattr(self, "checker", None) is None):
536
 
            self.PropertyChanged(dbus.String(u"checker_running"),
537
 
                                 dbus.Boolean(False, variant_level=1))
538
 
        return r
539
 
    
540
 
    ## D-Bus methods & signals
541
 
    _interface = u"se.bsnet.fukt.Mandos.Client"
542
 
    
543
 
    # CheckedOK - method
544
 
    CheckedOK = dbus.service.method(_interface)(checked_ok)
545
 
    CheckedOK.__name__ = "CheckedOK"
546
 
    
547
 
    # CheckerCompleted - signal
548
 
    @dbus.service.signal(_interface, signature="nxs")
549
 
    def CheckerCompleted(self, exitcode, waitstatus, command):
550
 
        "D-Bus signal"
551
 
        pass
552
 
    
553
 
    # CheckerStarted - signal
554
 
    @dbus.service.signal(_interface, signature="s")
555
 
    def CheckerStarted(self, command):
556
 
        "D-Bus signal"
557
 
        pass
558
 
    
559
 
    # GetAllProperties - method
560
 
    @dbus.service.method(_interface, out_signature="a{sv}")
561
 
    def GetAllProperties(self):
562
 
        "D-Bus method"
563
 
        return dbus.Dictionary({
564
 
                dbus.String("name"):
565
 
                    dbus.String(self.name, variant_level=1),
566
 
                dbus.String("fingerprint"):
567
 
                    dbus.String(self.fingerprint, variant_level=1),
568
 
                dbus.String("host"):
569
 
                    dbus.String(self.host, variant_level=1),
570
 
                dbus.String("created"):
571
 
                    _datetime_to_dbus(self.created, variant_level=1),
572
 
                dbus.String("last_enabled"):
573
 
                    (_datetime_to_dbus(self.last_enabled,
574
 
                                       variant_level=1)
575
 
                     if self.last_enabled is not None
576
 
                     else dbus.Boolean(False, variant_level=1)),
577
 
                dbus.String("enabled"):
578
 
                    dbus.Boolean(self.enabled, variant_level=1),
579
 
                dbus.String("last_checked_ok"):
580
 
                    (_datetime_to_dbus(self.last_checked_ok,
581
 
                                       variant_level=1)
582
 
                     if self.last_checked_ok is not None
583
 
                     else dbus.Boolean (False, variant_level=1)),
584
 
                dbus.String("timeout"):
585
 
                    dbus.UInt64(self.timeout_milliseconds(),
586
 
                                variant_level=1),
587
 
                dbus.String("interval"):
588
 
                    dbus.UInt64(self.interval_milliseconds(),
589
 
                                variant_level=1),
590
 
                dbus.String("checker"):
591
 
                    dbus.String(self.checker_command,
592
 
                                variant_level=1),
593
 
                dbus.String("checker_running"):
594
 
                    dbus.Boolean(self.checker is not None,
595
 
                                 variant_level=1),
596
 
                dbus.String("object_path"):
597
 
                    dbus.ObjectPath(self.dbus_object_path,
598
 
                                    variant_level=1)
599
 
                }, signature="sv")
600
 
    
601
 
    # IsStillValid - method
602
 
    @dbus.service.method(_interface, out_signature="b")
603
 
    def IsStillValid(self):
604
 
        return self.still_valid()
605
 
    
606
 
    # PropertyChanged - signal
607
 
    @dbus.service.signal(_interface, signature="sv")
608
 
    def PropertyChanged(self, property, value):
609
 
        "D-Bus signal"
610
 
        pass
611
 
    
612
 
    # ReceivedSecret - signal
613
 
    @dbus.service.signal(_interface)
614
 
    def ReceivedSecret(self):
615
 
        "D-Bus signal"
616
 
        pass
617
 
    
618
 
    # Rejected - signal
619
 
    @dbus.service.signal(_interface)
620
 
    def Rejected(self):
621
 
        "D-Bus signal"
622
 
        pass
623
 
    
624
 
    # SetChecker - method
625
 
    @dbus.service.method(_interface, in_signature="s")
626
 
    def SetChecker(self, checker):
627
 
        "D-Bus setter method"
628
 
        self.checker_command = checker
629
 
        # Emit D-Bus signal
630
 
        self.PropertyChanged(dbus.String(u"checker"),
631
 
                             dbus.String(self.checker_command,
632
 
                                         variant_level=1))
633
 
    
634
 
    # SetHost - method
635
 
    @dbus.service.method(_interface, in_signature="s")
636
 
    def SetHost(self, host):
637
 
        "D-Bus setter method"
638
 
        self.host = host
639
 
        # Emit D-Bus signal
640
 
        self.PropertyChanged(dbus.String(u"host"),
641
 
                             dbus.String(self.host, variant_level=1))
642
 
    
643
 
    # SetInterval - method
644
 
    @dbus.service.method(_interface, in_signature="t")
645
 
    def SetInterval(self, milliseconds):
646
 
        self.interval = datetime.timedelta(0, 0, 0, milliseconds)
647
 
        # Emit D-Bus signal
648
 
        self.PropertyChanged(dbus.String(u"interval"),
649
 
                             (dbus.UInt64(self.interval_milliseconds(),
650
 
                                          variant_level=1)))
651
 
    
652
 
    # SetSecret - method
653
 
    @dbus.service.method(_interface, in_signature="ay",
654
 
                         byte_arrays=True)
655
 
    def SetSecret(self, secret):
656
 
        "D-Bus setter method"
657
 
        self.secret = str(secret)
658
 
    
659
 
    # SetTimeout - method
660
 
    @dbus.service.method(_interface, in_signature="t")
661
 
    def SetTimeout(self, milliseconds):
662
 
        self.timeout = datetime.timedelta(0, 0, 0, milliseconds)
663
 
        # Emit D-Bus signal
664
 
        self.PropertyChanged(dbus.String(u"timeout"),
665
 
                             (dbus.UInt64(self.timeout_milliseconds(),
666
 
                                          variant_level=1)))
667
 
    
668
 
    # Enable - method
669
 
    Enable = dbus.service.method(_interface)(enable)
670
 
    Enable.__name__ = "Enable"
671
 
    
672
 
    # StartChecker - method
673
 
    @dbus.service.method(_interface)
674
 
    def StartChecker(self):
675
 
        "D-Bus method"
676
 
        self.start_checker()
677
 
    
678
 
    # Disable - method
679
 
    @dbus.service.method(_interface)
680
 
    def Disable(self):
681
 
        "D-Bus method"
682
 
        self.disable()
683
 
    
684
 
    # StopChecker - method
685
 
    StopChecker = dbus.service.method(_interface)(stop_checker)
686
 
    StopChecker.__name__ = "StopChecker"
687
 
    
688
 
    del _interface
689
 
 
690
 
 
691
 
class ClientHandler(SocketServer.BaseRequestHandler, object):
692
 
    """A class to handle client connections.
693
 
    
694
 
    Instantiated once for each connection to handle it.
 
380
def peer_certificate(session):
 
381
    "Return the peer's OpenPGP certificate as a bytestring"
 
382
    # If not an OpenPGP certificate...
 
383
    if gnutls.library.functions.gnutls_certificate_type_get\
 
384
            (session._c_object) \
 
385
           != gnutls.library.constants.GNUTLS_CRT_OPENPGP:
 
386
        # ...do the normal thing
 
387
        return session.peer_certificate
 
388
    list_size = ctypes.c_uint()
 
389
    cert_list = gnutls.library.functions.gnutls_certificate_get_peers\
 
390
        (session._c_object, ctypes.byref(list_size))
 
391
    if list_size.value == 0:
 
392
        return None
 
393
    cert = cert_list[0]
 
394
    return ctypes.string_at(cert.data, cert.size)
 
395
 
 
396
 
 
397
def fingerprint(openpgp):
 
398
    "Convert an OpenPGP bytestring to a hexdigit fingerprint string"
 
399
    # New empty GnuTLS certificate
 
400
    crt = gnutls.library.types.gnutls_openpgp_crt_t()
 
401
    gnutls.library.functions.gnutls_openpgp_crt_init\
 
402
        (ctypes.byref(crt))
 
403
    # New GnuTLS "datum" with the OpenPGP public key
 
404
    datum = gnutls.library.types.gnutls_datum_t\
 
405
        (ctypes.cast(ctypes.c_char_p(openpgp),
 
406
                     ctypes.POINTER(ctypes.c_ubyte)),
 
407
         ctypes.c_uint(len(openpgp)))
 
408
    # Import the OpenPGP public key into the certificate
 
409
    ret = gnutls.library.functions.gnutls_openpgp_crt_import\
 
410
        (crt,
 
411
         ctypes.byref(datum),
 
412
         gnutls.library.constants.GNUTLS_OPENPGP_FMT_RAW)
 
413
    # New buffer for the fingerprint
 
414
    buffer = ctypes.create_string_buffer(20)
 
415
    buffer_length = ctypes.c_size_t()
 
416
    # Get the fingerprint from the certificate into the buffer
 
417
    gnutls.library.functions.gnutls_openpgp_crt_get_fingerprint\
 
418
        (crt, ctypes.byref(buffer), ctypes.byref(buffer_length))
 
419
    # Deinit the certificate
 
420
    gnutls.library.functions.gnutls_openpgp_crt_deinit(crt)
 
421
    # Convert the buffer to a Python bytestring
 
422
    fpr = ctypes.string_at(buffer, buffer_length.value)
 
423
    # Convert the bytestring to hexadecimal notation
 
424
    hex_fpr = u''.join(u"%02X" % ord(char) for char in fpr)
 
425
    return hex_fpr
 
426
 
 
427
 
 
428
class tcp_handler(SocketServer.BaseRequestHandler, object):
 
429
    """A TCP request handler class.
 
430
    Instantiated by IPv6_TCPServer for each request to handle it.
695
431
    Note: This will run in its own forked process."""
696
432
    
697
433
    def handle(self):
698
 
        logger.info(u"TCP connection from: %s",
699
 
                    unicode(self.client_address))
700
 
        logger.debug(u"IPC Pipe FD: %d", self.server.pipe[1])
701
 
        # Open IPC pipe to parent process
702
 
        with closing(os.fdopen(self.server.pipe[1], "w", 1)) as ipc:
703
 
            session = (gnutls.connection
704
 
                       .ClientSession(self.request,
705
 
                                      gnutls.connection
706
 
                                      .X509Credentials()))
707
 
            
708
 
            line = self.request.makefile().readline()
709
 
            logger.debug(u"Protocol version: %r", line)
710
 
            try:
711
 
                if int(line.strip().split()[0]) > 1:
712
 
                    raise RuntimeError
713
 
            except (ValueError, IndexError, RuntimeError), error:
714
 
                logger.error(u"Unknown protocol version: %s", error)
715
 
                return
716
 
            
717
 
            # Note: gnutls.connection.X509Credentials is really a
718
 
            # generic GnuTLS certificate credentials object so long as
719
 
            # no X.509 keys are added to it.  Therefore, we can use it
720
 
            # here despite using OpenPGP certificates.
721
 
            
722
 
            #priority = ':'.join(("NONE", "+VERS-TLS1.1",
723
 
            #                     "+AES-256-CBC", "+SHA1",
724
 
            #                     "+COMP-NULL", "+CTYPE-OPENPGP",
725
 
            #                     "+DHE-DSS"))
726
 
            # Use a fallback default, since this MUST be set.
727
 
            priority = self.server.gnutls_priority
728
 
            if priority is None:
729
 
                priority = "NORMAL"
730
 
            (gnutls.library.functions
731
 
             .gnutls_priority_set_direct(session._c_object,
732
 
                                         priority, None))
733
 
            
734
 
            try:
735
 
                session.handshake()
736
 
            except gnutls.errors.GNUTLSError, error:
737
 
                logger.warning(u"Handshake failed: %s", error)
738
 
                # Do not run session.bye() here: the session is not
739
 
                # established.  Just abandon the request.
740
 
                return
741
 
            logger.debug(u"Handshake succeeded")
742
 
            try:
743
 
                fpr = self.fingerprint(self.peer_certificate(session))
744
 
            except (TypeError, gnutls.errors.GNUTLSError), error:
745
 
                logger.warning(u"Bad certificate: %s", error)
746
 
                session.bye()
747
 
                return
748
 
            logger.debug(u"Fingerprint: %s", fpr)
749
 
            
750
 
            for c in self.server.clients:
751
 
                if c.fingerprint == fpr:
752
 
                    client = c
753
 
                    break
754
 
            else:
755
 
                ipc.write("NOTFOUND %s\n" % fpr)
756
 
                session.bye()
757
 
                return
758
 
            # Have to check if client.still_valid(), since it is
759
 
            # possible that the client timed out while establishing
760
 
            # the GnuTLS session.
761
 
            if not client.still_valid():
762
 
                ipc.write("INVALID %s\n" % client.name)
763
 
                session.bye()
764
 
                return
765
 
            ipc.write("SENDING %s\n" % client.name)
766
 
            sent_size = 0
767
 
            while sent_size < len(client.secret):
768
 
                sent = session.send(client.secret[sent_size:])
769
 
                logger.debug(u"Sent: %d, remaining: %d",
770
 
                             sent, len(client.secret)
771
 
                             - (sent_size + sent))
772
 
                sent_size += sent
773
 
            session.bye()
774
 
    
775
 
    @staticmethod
776
 
    def peer_certificate(session):
777
 
        "Return the peer's OpenPGP certificate as a bytestring"
778
 
        # If not an OpenPGP certificate...
779
 
        if (gnutls.library.functions
780
 
            .gnutls_certificate_type_get(session._c_object)
781
 
            != gnutls.library.constants.GNUTLS_CRT_OPENPGP):
782
 
            # ...do the normal thing
783
 
            return session.peer_certificate
784
 
        list_size = ctypes.c_uint(1)
785
 
        cert_list = (gnutls.library.functions
786
 
                     .gnutls_certificate_get_peers
787
 
                     (session._c_object, ctypes.byref(list_size)))
788
 
        if not bool(cert_list) and list_size.value != 0:
789
 
            raise gnutls.errors.GNUTLSError("error getting peer"
790
 
                                            " certificate")
791
 
        if list_size.value == 0:
792
 
            return None
793
 
        cert = cert_list[0]
794
 
        return ctypes.string_at(cert.data, cert.size)
795
 
    
796
 
    @staticmethod
797
 
    def fingerprint(openpgp):
798
 
        "Convert an OpenPGP bytestring to a hexdigit fingerprint"
799
 
        # New GnuTLS "datum" with the OpenPGP public key
800
 
        datum = (gnutls.library.types
801
 
                 .gnutls_datum_t(ctypes.cast(ctypes.c_char_p(openpgp),
802
 
                                             ctypes.POINTER
803
 
                                             (ctypes.c_ubyte)),
804
 
                                 ctypes.c_uint(len(openpgp))))
805
 
        # New empty GnuTLS certificate
806
 
        crt = gnutls.library.types.gnutls_openpgp_crt_t()
807
 
        (gnutls.library.functions
808
 
         .gnutls_openpgp_crt_init(ctypes.byref(crt)))
809
 
        # Import the OpenPGP public key into the certificate
810
 
        (gnutls.library.functions
811
 
         .gnutls_openpgp_crt_import(crt, ctypes.byref(datum),
812
 
                                    gnutls.library.constants
813
 
                                    .GNUTLS_OPENPGP_FMT_RAW))
814
 
        # Verify the self signature in the key
815
 
        crtverify = ctypes.c_uint()
816
 
        (gnutls.library.functions
817
 
         .gnutls_openpgp_crt_verify_self(crt, 0,
818
 
                                         ctypes.byref(crtverify)))
819
 
        if crtverify.value != 0:
820
 
            gnutls.library.functions.gnutls_openpgp_crt_deinit(crt)
821
 
            raise (gnutls.errors.CertificateSecurityError
822
 
                   ("Verify failed"))
823
 
        # New buffer for the fingerprint
824
 
        buf = ctypes.create_string_buffer(20)
825
 
        buf_len = ctypes.c_size_t()
826
 
        # Get the fingerprint from the certificate into the buffer
827
 
        (gnutls.library.functions
828
 
         .gnutls_openpgp_crt_get_fingerprint(crt, ctypes.byref(buf),
829
 
                                             ctypes.byref(buf_len)))
830
 
        # Deinit the certificate
831
 
        gnutls.library.functions.gnutls_openpgp_crt_deinit(crt)
832
 
        # Convert the buffer to a Python bytestring
833
 
        fpr = ctypes.string_at(buf, buf_len.value)
834
 
        # Convert the bytestring to hexadecimal notation
835
 
        hex_fpr = u''.join(u"%02X" % ord(char) for char in fpr)
836
 
        return hex_fpr
837
 
 
838
 
 
839
 
class ForkingMixInWithPipe(SocketServer.ForkingMixIn, object):
840
 
    """Like SocketServer.ForkingMixIn, but also pass a pipe.
841
 
    
842
 
    Assumes a gobject.MainLoop event loop.
843
 
    """
844
 
    def process_request(self, request, client_address):
845
 
        """Overrides and wraps the original process_request().
846
 
        
847
 
        This function creates a new pipe in self.pipe 
848
 
        """
849
 
        self.pipe = os.pipe()
850
 
        super(ForkingMixInWithPipe,
851
 
              self).process_request(request, client_address)
852
 
        os.close(self.pipe[1])  # close write end
853
 
        # Call "handle_ipc" for both data and EOF events
854
 
        gobject.io_add_watch(self.pipe[0],
855
 
                             gobject.IO_IN | gobject.IO_HUP,
856
 
                             self.handle_ipc)
857
 
    def handle_ipc(source, condition):
858
 
        """Dummy function; override as necessary"""
859
 
        os.close(source)
860
 
        return False
861
 
 
862
 
 
863
 
class IPv6_TCPServer(ForkingMixInWithPipe,
864
 
                     SocketServer.TCPServer, object):
865
 
    """IPv6-capable TCP server.  Accepts 'None' as address and/or port
866
 
    
 
434
        logger.debug(u"TCP connection from: %s",
 
435
                     unicode(self.client_address))
 
436
        session = gnutls.connection.ClientSession\
 
437
                  (self.request, gnutls.connection.X509Credentials())
 
438
        # Note: gnutls.connection.X509Credentials is really a generic
 
439
        # GnuTLS certificate credentials object so long as no X.509
 
440
        # keys are added to it.  Therefore, we can use it here despite
 
441
        # using OpenPGP certificates.
 
442
        
 
443
        #priority = ':'.join(("NONE", "+VERS-TLS1.1", "+AES-256-CBC",
 
444
        #                "+SHA1", "+COMP-NULL", "+CTYPE-OPENPGP",
 
445
        #                "+DHE-DSS"))
 
446
        priority = "NORMAL"             # Fallback default, since this
 
447
                                        # MUST be set.
 
448
        if self.server.settings["priority"]:
 
449
            priority = self.server.settings["priority"]
 
450
        gnutls.library.functions.gnutls_priority_set_direct\
 
451
            (session._c_object, priority, None);
 
452
        
 
453
        try:
 
454
            session.handshake()
 
455
        except gnutls.errors.GNUTLSError, error:
 
456
            logger.debug(u"Handshake failed: %s", error)
 
457
            # Do not run session.bye() here: the session is not
 
458
            # established.  Just abandon the request.
 
459
            return
 
460
        try:
 
461
            fpr = fingerprint(peer_certificate(session))
 
462
        except (TypeError, gnutls.errors.GNUTLSError), error:
 
463
            logger.debug(u"Bad certificate: %s", error)
 
464
            session.bye()
 
465
            return
 
466
        logger.debug(u"Fingerprint: %s", fpr)
 
467
        client = None
 
468
        for c in self.server.clients:
 
469
            if c.fingerprint == fpr:
 
470
                client = c
 
471
                break
 
472
        if not client:
 
473
            logger.debug(u"Client not found for fingerprint: %s", fpr)
 
474
            session.bye()
 
475
            return
 
476
        # Have to check if client.still_valid(), since it is possible
 
477
        # that the client timed out while establishing the GnuTLS
 
478
        # session.
 
479
        if not client.still_valid():
 
480
            logger.debug(u"Client %(name)s is invalid", vars(client))
 
481
            session.bye()
 
482
            return
 
483
        sent_size = 0
 
484
        while sent_size < len(client.secret):
 
485
            sent = session.send(client.secret[sent_size:])
 
486
            logger.debug(u"Sent: %d, remaining: %d",
 
487
                         sent, len(client.secret)
 
488
                         - (sent_size + sent))
 
489
            sent_size += sent
 
490
        session.bye()
 
491
 
 
492
 
 
493
class IPv6_TCPServer(SocketServer.ForkingTCPServer, object):
 
494
    """IPv6 TCP server.  Accepts 'None' as address and/or port.
867
495
    Attributes:
868
 
        enabled:        Boolean; whether this server is activated yet
869
 
        interface:      None or a network interface name (string)
870
 
        use_ipv6:       Boolean; to use IPv6 or not
871
 
        ----
 
496
        settings:       Server settings
872
497
        clients:        Set() of Client objects
873
 
        gnutls_priority GnuTLS priority string
874
 
        use_dbus:       Boolean; to emit D-Bus signals or not
875
498
    """
876
 
    def __init__(self, server_address, RequestHandlerClass,
877
 
                 interface=None, use_ipv6=True, clients=None,
878
 
                 gnutls_priority=None, use_dbus=True):
879
 
        self.enabled = False
880
 
        self.interface = interface
881
 
        if use_ipv6:
882
 
            self.address_family = socket.AF_INET6
883
 
        self.clients = clients
884
 
        self.use_dbus = use_dbus
885
 
        self.gnutls_priority = gnutls_priority
886
 
        SocketServer.TCPServer.__init__(self, server_address,
887
 
                                        RequestHandlerClass)
 
499
    address_family = socket.AF_INET6
 
500
    def __init__(self, *args, **kwargs):
 
501
        if "settings" in kwargs:
 
502
            self.settings = kwargs["settings"]
 
503
            del kwargs["settings"]
 
504
        if "clients" in kwargs:
 
505
            self.clients = kwargs["clients"]
 
506
            del kwargs["clients"]
 
507
        return super(type(self), self).__init__(*args, **kwargs)
888
508
    def server_bind(self):
889
509
        """This overrides the normal server_bind() function
890
510
        to bind to an interface if one was specified, and also NOT to
891
511
        bind to an address or port if they were not specified."""
892
 
        if self.interface is not None:
 
512
        if self.settings["interface"]:
 
513
            # 25 is from /usr/include/asm-i486/socket.h
 
514
            SO_BINDTODEVICE = getattr(socket, "SO_BINDTODEVICE", 25)
893
515
            try:
894
516
                self.socket.setsockopt(socket.SOL_SOCKET,
895
517
                                       SO_BINDTODEVICE,
896
 
                                       self.interface + '\0')
 
518
                                       self.settings["interface"])
897
519
            except socket.error, error:
898
520
                if error[0] == errno.EPERM:
899
 
                    logger.error(u"No permission to"
900
 
                                 u" bind to interface %s",
901
 
                                 self.interface)
 
521
                    logger.warning(u"No permission to"
 
522
                                   u" bind to interface %s",
 
523
                                   self.settings["interface"])
902
524
                else:
903
 
                    raise
 
525
                    raise error
904
526
        # Only bind(2) the socket if we really need to.
905
527
        if self.server_address[0] or self.server_address[1]:
906
528
            if not self.server_address[0]:
907
 
                if self.address_family == socket.AF_INET6:
908
 
                    any_address = "::" # in6addr_any
909
 
                else:
910
 
                    any_address = socket.INADDR_ANY
911
 
                self.server_address = (any_address,
 
529
                in6addr_any = "::"
 
530
                self.server_address = (in6addr_any,
912
531
                                       self.server_address[1])
913
 
            elif not self.server_address[1]:
 
532
            elif self.server_address[1] is None:
914
533
                self.server_address = (self.server_address[0],
915
534
                                       0)
916
 
#                 if self.interface:
917
 
#                     self.server_address = (self.server_address[0],
918
 
#                                            0, # port
919
 
#                                            0, # flowinfo
920
 
#                                            if_nametoindex
921
 
#                                            (self.interface))
922
 
            return SocketServer.TCPServer.server_bind(self)
923
 
    def server_activate(self):
924
 
        if self.enabled:
925
 
            return SocketServer.TCPServer.server_activate(self)
926
 
    def enable(self):
927
 
        self.enabled = True
928
 
    def handle_ipc(self, source, condition, file_objects={}):
929
 
        condition_names = {
930
 
            gobject.IO_IN: "IN", # There is data to read.
931
 
            gobject.IO_OUT: "OUT", # Data can be written (without
932
 
                                   # blocking).
933
 
            gobject.IO_PRI: "PRI", # There is urgent data to read.
934
 
            gobject.IO_ERR: "ERR", # Error condition.
935
 
            gobject.IO_HUP: "HUP"  # Hung up (the connection has been
936
 
                                   # broken, usually for pipes and
937
 
                                   # sockets).
938
 
            }
939
 
        conditions_string = ' | '.join(name
940
 
                                       for cond, name in
941
 
                                       condition_names.iteritems()
942
 
                                       if cond & condition)
943
 
        logger.debug("Handling IPC: FD = %d, condition = %s", source,
944
 
                     conditions_string)
945
 
        
946
 
        # Turn the pipe file descriptor into a Python file object
947
 
        if source not in file_objects:
948
 
            file_objects[source] = os.fdopen(source, "r", 1)
949
 
        
950
 
        # Read a line from the file object
951
 
        cmdline = file_objects[source].readline()
952
 
        if not cmdline:             # Empty line means end of file
953
 
            # close the IPC pipe
954
 
            file_objects[source].close()
955
 
            del file_objects[source]
956
 
            
957
 
            # Stop calling this function
958
 
            return False
959
 
        
960
 
        logger.debug("IPC command: %r", cmdline)
961
 
        
962
 
        # Parse and act on command
963
 
        cmd, args = cmdline.rstrip("\r\n").split(None, 1)
964
 
        
965
 
        if cmd == "NOTFOUND":
966
 
            logger.warning(u"Client not found for fingerprint: %s",
967
 
                           args)
968
 
            if self.use_dbus:
969
 
                # Emit D-Bus signal
970
 
                mandos_dbus_service.ClientNotFound(args)
971
 
        elif cmd == "INVALID":
972
 
            for client in self.clients:
973
 
                if client.name == args:
974
 
                    logger.warning(u"Client %s is invalid", args)
975
 
                    if self.use_dbus:
976
 
                        # Emit D-Bus signal
977
 
                        client.Rejected()
978
 
                    break
979
 
            else:
980
 
                logger.error(u"Unknown client %s is invalid", args)
981
 
        elif cmd == "SENDING":
982
 
            for client in self.clients:
983
 
                if client.name == args:
984
 
                    logger.info(u"Sending secret to %s", client.name)
985
 
                    client.checked_ok()
986
 
                    if self.use_dbus:
987
 
                        # Emit D-Bus signal
988
 
                        client.ReceivedSecret()
989
 
                    break
990
 
            else:
991
 
                logger.error(u"Sending secret to unknown client %s",
992
 
                             args)
993
 
        else:
994
 
            logger.error("Unknown IPC command: %r", cmdline)
995
 
        
996
 
        # Keep calling this function
997
 
        return True
 
535
            return super(type(self), self).server_bind()
998
536
 
999
537
 
1000
538
def string_to_delta(interval):
1001
539
    """Parse a string and return a datetime.timedelta
1002
 
    
 
540
 
1003
541
    >>> string_to_delta('7d')
1004
542
    datetime.timedelta(7)
1005
543
    >>> string_to_delta('60s')
1010
548
    datetime.timedelta(1)
1011
549
    >>> string_to_delta(u'1w')
1012
550
    datetime.timedelta(7)
1013
 
    >>> string_to_delta('5m 30s')
1014
 
    datetime.timedelta(0, 330)
1015
551
    """
1016
 
    timevalue = datetime.timedelta(0)
1017
 
    for s in interval.split():
1018
 
        try:
1019
 
            suffix = unicode(s[-1])
1020
 
            value = int(s[:-1])
1021
 
            if suffix == u"d":
1022
 
                delta = datetime.timedelta(value)
1023
 
            elif suffix == u"s":
1024
 
                delta = datetime.timedelta(0, value)
1025
 
            elif suffix == u"m":
1026
 
                delta = datetime.timedelta(0, 0, 0, 0, value)
1027
 
            elif suffix == u"h":
1028
 
                delta = datetime.timedelta(0, 0, 0, 0, 0, value)
1029
 
            elif suffix == u"w":
1030
 
                delta = datetime.timedelta(0, 0, 0, 0, 0, 0, value)
1031
 
            else:
1032
 
                raise ValueError
1033
 
        except (ValueError, IndexError):
 
552
    try:
 
553
        suffix=unicode(interval[-1])
 
554
        value=int(interval[:-1])
 
555
        if suffix == u"d":
 
556
            delta = datetime.timedelta(value)
 
557
        elif suffix == u"s":
 
558
            delta = datetime.timedelta(0, value)
 
559
        elif suffix == u"m":
 
560
            delta = datetime.timedelta(0, 0, 0, 0, value)
 
561
        elif suffix == u"h":
 
562
            delta = datetime.timedelta(0, 0, 0, 0, 0, value)
 
563
        elif suffix == u"w":
 
564
            delta = datetime.timedelta(0, 0, 0, 0, 0, 0, value)
 
565
        else:
1034
566
            raise ValueError
1035
 
        timevalue += delta
1036
 
    return timevalue
 
567
    except (ValueError, IndexError):
 
568
        raise ValueError
 
569
    return delta
1037
570
 
1038
571
 
1039
572
def server_state_changed(state):
1040
573
    """Derived from the Avahi example code"""
1041
574
    if state == avahi.SERVER_COLLISION:
1042
 
        logger.error(u"Zeroconf server name collision")
 
575
        logger.warning(u"Server name collision")
1043
576
        service.remove()
1044
577
    elif state == avahi.SERVER_RUNNING:
1045
578
        service.add()
1047
580
 
1048
581
def entry_group_state_changed(state, error):
1049
582
    """Derived from the Avahi example code"""
1050
 
    logger.debug(u"Avahi state change: %i", state)
 
583
    logger.debug(u"state change: %i", state)
1051
584
    
1052
585
    if state == avahi.ENTRY_GROUP_ESTABLISHED:
1053
 
        logger.debug(u"Zeroconf service established.")
 
586
        logger.debug(u"Service established.")
1054
587
    elif state == avahi.ENTRY_GROUP_COLLISION:
1055
 
        logger.warning(u"Zeroconf service name collision.")
 
588
        logger.warning(u"Service name collision.")
1056
589
        service.rename()
1057
590
    elif state == avahi.ENTRY_GROUP_FAILURE:
1058
 
        logger.critical(u"Avahi: Error in group state changed %s",
 
591
        logger.critical(u"Error in group state changed %s",
1059
592
                        unicode(error))
1060
 
        raise AvahiGroupError(u"State changed: %s" % unicode(error))
 
593
        raise AvahiGroupError("State changed: %s", str(error))
1061
594
 
1062
 
def if_nametoindex(interface):
 
595
def if_nametoindex(interface, _func=[None]):
1063
596
    """Call the C function if_nametoindex(), or equivalent"""
1064
 
    global if_nametoindex
 
597
    if _func[0] is not None:
 
598
        return _func[0](interface)
1065
599
    try:
1066
 
        if_nametoindex = (ctypes.cdll.LoadLibrary
1067
 
                          (ctypes.util.find_library("c"))
1068
 
                          .if_nametoindex)
 
600
        if "ctypes.util" not in sys.modules:
 
601
            import ctypes.util
 
602
        while True:
 
603
            try:
 
604
                libc = ctypes.cdll.LoadLibrary\
 
605
                       (ctypes.util.find_library("c"))
 
606
                _func[0] = libc.if_nametoindex
 
607
                return _func[0](interface)
 
608
            except IOError, e:
 
609
                if e != errno.EINTR:
 
610
                    raise
1069
611
    except (OSError, AttributeError):
1070
612
        if "struct" not in sys.modules:
1071
613
            import struct
1072
614
        if "fcntl" not in sys.modules:
1073
615
            import fcntl
1074
 
        def if_nametoindex(interface):
 
616
        def the_hard_way(interface):
1075
617
            "Get an interface index the hard way, i.e. using fcntl()"
1076
618
            SIOCGIFINDEX = 0x8933  # From /usr/include/linux/sockios.h
1077
 
            with closing(socket.socket()) as s:
1078
 
                ifreq = fcntl.ioctl(s, SIOCGIFINDEX,
1079
 
                                    struct.pack("16s16x", interface))
 
619
            s = socket.socket()
 
620
            ifreq = fcntl.ioctl(s, SIOCGIFINDEX,
 
621
                                struct.pack("16s16x", interface))
 
622
            s.close()
1080
623
            interface_index = struct.unpack("I", ifreq[16:20])[0]
1081
624
            return interface_index
1082
 
    return if_nametoindex(interface)
1083
 
 
1084
 
 
1085
 
def daemon(nochdir = False, noclose = False):
 
625
        _func[0] = the_hard_way
 
626
        return _func[0](interface)
 
627
 
 
628
 
 
629
def daemon(nochdir, noclose):
1086
630
    """See daemon(3).  Standard BSD Unix function.
1087
 
    
1088
631
    This should really exist as os.daemon, but it doesn't (yet)."""
1089
632
    if os.fork():
1090
633
        sys.exit()
1091
634
    os.setsid()
1092
635
    if not nochdir:
1093
636
        os.chdir("/")
1094
 
    if os.fork():
1095
 
        sys.exit()
1096
637
    if not noclose:
1097
638
        # Close all standard open file descriptors
1098
639
        null = os.open(os.path.devnull, os.O_NOCTTY | os.O_RDWR)
1107
648
 
1108
649
 
1109
650
def main():
1110
 
    
1111
 
    ######################################################################
1112
 
    # Parsing of options, both command line and config file
1113
 
    
1114
 
    parser = optparse.OptionParser(version = "%%prog %s" % version)
 
651
    global main_loop_started
 
652
    main_loop_started = False
 
653
    
 
654
    parser = OptionParser()
1115
655
    parser.add_option("-i", "--interface", type="string",
1116
656
                      metavar="IF", help="Bind to interface IF")
1117
657
    parser.add_option("-a", "--address", type="string",
1118
658
                      help="Address to listen for requests on")
1119
659
    parser.add_option("-p", "--port", type="int",
1120
660
                      help="Port number to receive requests on")
1121
 
    parser.add_option("--check", action="store_true",
 
661
    parser.add_option("--check", action="store_true", default=False,
1122
662
                      help="Run self-test")
1123
 
    parser.add_option("--debug", action="store_true",
 
663
    parser.add_option("--debug", action="store_true", default=False,
1124
664
                      help="Debug mode; run in foreground and log to"
1125
665
                      " terminal")
1126
666
    parser.add_option("--priority", type="string", help="GnuTLS"
1131
671
                      default="/etc/mandos", metavar="DIR",
1132
672
                      help="Directory to search for configuration"
1133
673
                      " files")
1134
 
    parser.add_option("--no-dbus", action="store_false",
1135
 
                      dest="use_dbus",
1136
 
                      help="Do not provide D-Bus system bus"
1137
 
                      " interface")
1138
 
    parser.add_option("--no-ipv6", action="store_false",
1139
 
                      dest="use_ipv6", help="Do not use IPv6")
1140
 
    options = parser.parse_args()[0]
 
674
    (options, args) = parser.parse_args()
1141
675
    
1142
676
    if options.check:
1143
677
        import doctest
1152
686
                        "priority":
1153
687
                        "SECURE256:!CTYPE-X.509:+CTYPE-OPENPGP",
1154
688
                        "servicename": "Mandos",
1155
 
                        "use_dbus": "True",
1156
 
                        "use_ipv6": "True",
1157
689
                        }
1158
690
    
1159
691
    # Parse config file for server-global settings
1160
692
    server_config = ConfigParser.SafeConfigParser(server_defaults)
1161
693
    del server_defaults
1162
 
    server_config.read(os.path.join(options.configdir, "mandos.conf"))
 
694
    server_config.read(os.path.join(options.configdir, "server.conf"))
 
695
    server_section = "server"
1163
696
    # Convert the SafeConfigParser object to a dict
1164
 
    server_settings = server_config.defaults()
1165
 
    # Use the appropriate methods on the non-string config options
1166
 
    server_settings["debug"] = server_config.getboolean("DEFAULT",
1167
 
                                                        "debug")
1168
 
    server_settings["use_dbus"] = server_config.getboolean("DEFAULT",
1169
 
                                                           "use_dbus")
1170
 
    server_settings["use_ipv6"] = server_config.getboolean("DEFAULT",
1171
 
                                                           "use_ipv6")
1172
 
    if server_settings["port"]:
1173
 
        server_settings["port"] = server_config.getint("DEFAULT",
1174
 
                                                       "port")
 
697
    server_settings = dict(server_config.items(server_section))
 
698
    # Use getboolean on the boolean config option
 
699
    server_settings["debug"] = server_config.getboolean\
 
700
                               (server_section, "debug")
1175
701
    del server_config
1176
702
    
1177
703
    # Override the settings from the config file with command line
1178
704
    # options, if set.
1179
705
    for option in ("interface", "address", "port", "debug",
1180
 
                   "priority", "servicename", "configdir",
1181
 
                   "use_dbus", "use_ipv6"):
 
706
                   "priority", "servicename", "configdir"):
1182
707
        value = getattr(options, option)
1183
708
        if value is not None:
1184
709
            server_settings[option] = value
1185
710
    del options
1186
711
    # Now we have our good server settings in "server_settings"
1187
712
    
1188
 
    ##################################################################
1189
 
    
1190
 
    # For convenience
1191
 
    debug = server_settings["debug"]
1192
 
    use_dbus = server_settings["use_dbus"]
1193
 
    use_ipv6 = server_settings["use_ipv6"]
1194
 
    
1195
 
    if not debug:
1196
 
        syslogger.setLevel(logging.WARNING)
1197
 
        console.setLevel(logging.WARNING)
1198
 
    
1199
 
    if server_settings["servicename"] != "Mandos":
1200
 
        syslogger.setFormatter(logging.Formatter
1201
 
                               ('Mandos (%s) [%%(process)d]:'
1202
 
                                ' %%(levelname)s: %%(message)s'
1203
 
                                % server_settings["servicename"]))
1204
 
    
1205
713
    # Parse config file with clients
1206
714
    client_defaults = { "timeout": "1h",
1207
715
                        "interval": "5m",
1208
 
                        "checker": "fping -q -- %%(host)s",
1209
 
                        "host": "",
 
716
                        "checker": "fping -q -- %%(fqdn)s",
1210
717
                        }
1211
718
    client_config = ConfigParser.SafeConfigParser(client_defaults)
1212
719
    client_config.read(os.path.join(server_settings["configdir"],
1213
720
                                    "clients.conf"))
1214
 
 
1215
 
    global mandos_dbus_service
1216
 
    mandos_dbus_service = None
1217
 
    
1218
 
    clients = Set()
1219
 
    tcp_server = IPv6_TCPServer((server_settings["address"],
1220
 
                                 server_settings["port"]),
1221
 
                                ClientHandler,
1222
 
                                interface=
1223
 
                                server_settings["interface"],
1224
 
                                use_ipv6=use_ipv6,
1225
 
                                clients=clients,
1226
 
                                gnutls_priority=
1227
 
                                server_settings["priority"],
1228
 
                                use_dbus=use_dbus)
1229
 
    pidfilename = "/var/run/mandos.pid"
1230
 
    try:
1231
 
        pidfile = open(pidfilename, "w")
1232
 
    except IOError:
1233
 
        logger.error("Could not open file %r", pidfilename)
1234
 
    
1235
 
    try:
1236
 
        uid = pwd.getpwnam("_mandos").pw_uid
1237
 
        gid = pwd.getpwnam("_mandos").pw_gid
1238
 
    except KeyError:
1239
 
        try:
1240
 
            uid = pwd.getpwnam("mandos").pw_uid
1241
 
            gid = pwd.getpwnam("mandos").pw_gid
1242
 
        except KeyError:
1243
 
            try:
1244
 
                uid = pwd.getpwnam("nobody").pw_uid
1245
 
                gid = pwd.getpwnam("nogroup").pw_gid
1246
 
            except KeyError:
1247
 
                uid = 65534
1248
 
                gid = 65534
1249
 
    try:
1250
 
        os.setgid(gid)
1251
 
        os.setuid(uid)
1252
 
    except OSError, error:
1253
 
        if error[0] != errno.EPERM:
1254
 
            raise error
1255
 
    
1256
 
    # Enable all possible GnuTLS debugging
1257
 
    if debug:
1258
 
        # "Use a log level over 10 to enable all debugging options."
1259
 
        # - GnuTLS manual
1260
 
        gnutls.library.functions.gnutls_global_set_log_level(11)
1261
 
        
1262
 
        @gnutls.library.types.gnutls_log_func
1263
 
        def debug_gnutls(level, string):
1264
 
            logger.debug("GnuTLS: %s", string[:-1])
1265
 
        
1266
 
        (gnutls.library.functions
1267
 
         .gnutls_global_set_log_function(debug_gnutls))
1268
721
    
1269
722
    global service
1270
 
    protocol = avahi.PROTO_INET6 if use_ipv6 else avahi.PROTO_INET
1271
723
    service = AvahiService(name = server_settings["servicename"],
1272
 
                           servicetype = "_mandos._tcp",
1273
 
                           protocol = protocol)
 
724
                           type = "_mandos._tcp", );
1274
725
    if server_settings["interface"]:
1275
 
        service.interface = (if_nametoindex
1276
 
                             (server_settings["interface"]))
 
726
        service.interface = if_nametoindex(server_settings["interface"])
1277
727
    
1278
728
    global main_loop
1279
729
    global bus
1282
732
    DBusGMainLoop(set_as_default=True )
1283
733
    main_loop = gobject.MainLoop()
1284
734
    bus = dbus.SystemBus()
1285
 
    server = dbus.Interface(bus.get_object(avahi.DBUS_NAME,
1286
 
                                           avahi.DBUS_PATH_SERVER),
1287
 
                            avahi.DBUS_INTERFACE_SERVER)
 
735
    server = dbus.Interface(
 
736
            bus.get_object( avahi.DBUS_NAME, avahi.DBUS_PATH_SERVER ),
 
737
            avahi.DBUS_INTERFACE_SERVER )
1288
738
    # End of Avahi example code
1289
 
    if use_dbus:
1290
 
        bus_name = dbus.service.BusName(u"se.bsnet.fukt.Mandos", bus)
1291
739
    
1292
 
    client_class = Client
1293
 
    if use_dbus:
1294
 
        client_class = ClientDBus
1295
 
    clients.update(Set(
1296
 
            client_class(name = section,
1297
 
                         config= dict(client_config.items(section)))
1298
 
            for section in client_config.sections()))
1299
 
    if not clients:
1300
 
        logger.warning(u"No clients defined")
 
740
    debug = server_settings["debug"]
1301
741
    
1302
742
    if debug:
1303
 
        # Redirect stdin so all checkers get /dev/null
1304
 
        null = os.open(os.path.devnull, os.O_NOCTTY | os.O_RDWR)
1305
 
        os.dup2(null, sys.stdin.fileno())
1306
 
        if null > 2:
1307
 
            os.close(null)
1308
 
    else:
1309
 
        # No console logging
1310
 
        logger.removeHandler(console)
1311
 
        # Close all input and output, do double fork, etc.
1312
 
        daemon()
1313
 
    
1314
 
    try:
1315
 
        with closing(pidfile):
1316
 
            pid = os.getpid()
1317
 
            pidfile.write(str(pid) + "\n")
1318
 
        del pidfile
1319
 
    except IOError:
1320
 
        logger.error(u"Could not write to file %r with PID %d",
1321
 
                     pidfilename, pid)
1322
 
    except NameError:
1323
 
        # "pidfile" was never created
1324
 
        pass
1325
 
    del pidfilename
 
743
        console = logging.StreamHandler()
 
744
        # console.setLevel(logging.DEBUG)
 
745
        console.setFormatter(logging.Formatter\
 
746
                             ('%(levelname)s: %(message)s'))
 
747
        logger.addHandler(console)
 
748
        del console
 
749
    
 
750
    clients = Set()
 
751
    def remove_from_clients(client):
 
752
        clients.remove(client)
 
753
        if not clients:
 
754
            logger.debug(u"No clients left, exiting")
 
755
            sys.exit()
 
756
    
 
757
    clients.update(Set(Client(name=section,
 
758
                              stop_hook = remove_from_clients,
 
759
                              **(dict(client_config\
 
760
                                      .items(section))))
 
761
                       for section in client_config.sections()))
 
762
    
 
763
    if not debug:
 
764
        daemon(False, False)
1326
765
    
1327
766
    def cleanup():
1328
767
        "Cleanup function; run on exit"
1335
774
        
1336
775
        while clients:
1337
776
            client = clients.pop()
1338
 
            client.disable_hook = None
1339
 
            client.disable()
 
777
            client.stop_hook = None
 
778
            client.stop()
1340
779
    
1341
780
    atexit.register(cleanup)
1342
781
    
1345
784
    signal.signal(signal.SIGHUP, lambda signum, frame: sys.exit())
1346
785
    signal.signal(signal.SIGTERM, lambda signum, frame: sys.exit())
1347
786
    
1348
 
    if use_dbus:
1349
 
        class MandosDBusService(dbus.service.Object):
1350
 
            """A D-Bus proxy object"""
1351
 
            def __init__(self):
1352
 
                dbus.service.Object.__init__(self, bus, "/")
1353
 
            _interface = u"se.bsnet.fukt.Mandos"
1354
 
            
1355
 
            @dbus.service.signal(_interface, signature="oa{sv}")
1356
 
            def ClientAdded(self, objpath, properties):
1357
 
                "D-Bus signal"
1358
 
                pass
1359
 
            
1360
 
            @dbus.service.signal(_interface, signature="s")
1361
 
            def ClientNotFound(self, fingerprint):
1362
 
                "D-Bus signal"
1363
 
                pass
1364
 
            
1365
 
            @dbus.service.signal(_interface, signature="os")
1366
 
            def ClientRemoved(self, objpath, name):
1367
 
                "D-Bus signal"
1368
 
                pass
1369
 
            
1370
 
            @dbus.service.method(_interface, out_signature="ao")
1371
 
            def GetAllClients(self):
1372
 
                "D-Bus method"
1373
 
                return dbus.Array(c.dbus_object_path for c in clients)
1374
 
            
1375
 
            @dbus.service.method(_interface, out_signature="a{oa{sv}}")
1376
 
            def GetAllClientsWithProperties(self):
1377
 
                "D-Bus method"
1378
 
                return dbus.Dictionary(
1379
 
                    ((c.dbus_object_path, c.GetAllProperties())
1380
 
                     for c in clients),
1381
 
                    signature="oa{sv}")
1382
 
            
1383
 
            @dbus.service.method(_interface, in_signature="o")
1384
 
            def RemoveClient(self, object_path):
1385
 
                "D-Bus method"
1386
 
                for c in clients:
1387
 
                    if c.dbus_object_path == object_path:
1388
 
                        clients.remove(c)
1389
 
                        c.remove_from_connection()
1390
 
                        # Don't signal anything except ClientRemoved
1391
 
                        c.disable(signal=False)
1392
 
                        # Emit D-Bus signal
1393
 
                        self.ClientRemoved(object_path, c.name)
1394
 
                        return
1395
 
                raise KeyError
1396
 
            
1397
 
            del _interface
1398
 
        
1399
 
        mandos_dbus_service = MandosDBusService()
1400
 
    
1401
787
    for client in clients:
1402
 
        if use_dbus:
1403
 
            # Emit D-Bus signal
1404
 
            mandos_dbus_service.ClientAdded(client.dbus_object_path,
1405
 
                                            client.GetAllProperties())
1406
 
        client.enable()
1407
 
    
1408
 
    tcp_server.enable()
1409
 
    tcp_server.server_activate()
1410
 
    
 
788
        client.start()
 
789
    
 
790
    tcp_server = IPv6_TCPServer((server_settings["address"],
 
791
                                 server_settings["port"]),
 
792
                                tcp_handler,
 
793
                                settings=server_settings,
 
794
                                clients=clients)
1411
795
    # Find out what port we got
1412
796
    service.port = tcp_server.socket.getsockname()[1]
1413
 
    if use_ipv6:
1414
 
        logger.info(u"Now listening on address %r, port %d,"
1415
 
                    " flowinfo %d, scope_id %d"
1416
 
                    % tcp_server.socket.getsockname())
1417
 
    else:                       # IPv4
1418
 
        logger.info(u"Now listening on address %r, port %d"
1419
 
                    % tcp_server.socket.getsockname())
 
797
    logger.debug(u"Now listening on address %r, port %d, flowinfo %d,"
 
798
                 u" scope_id %d" % tcp_server.socket.getsockname())
1420
799
    
1421
800
    #service.interface = tcp_server.socket.getsockname()[3]
1422
801
    
1432
811
        
1433
812
        gobject.io_add_watch(tcp_server.fileno(), gobject.IO_IN,
1434
813
                             lambda *args, **kwargs:
1435
 
                             (tcp_server.handle_request
1436
 
                              (*args[2:], **kwargs) or True))
 
814
                             tcp_server.handle_request\
 
815
                             (*args[2:], **kwargs) or True)
1437
816
        
1438
 
        logger.debug(u"Starting main loop")
 
817
        logger.debug("Starting main loop")
 
818
        main_loop_started = True
1439
819
        main_loop.run()
1440
820
    except AvahiError, error:
1441
 
        logger.critical(u"AvahiError: %s", error)
 
821
        logger.critical(u"AvahiError: %s" + unicode(error))
1442
822
        sys.exit(1)
1443
823
    except KeyboardInterrupt:
1444
824
        if debug:
1445
 
            print >> sys.stderr
1446
 
        logger.debug("Server received KeyboardInterrupt")
1447
 
    logger.debug("Server exiting")
 
825
            print
1448
826
 
1449
827
if __name__ == '__main__':
1450
828
    main()