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  • Committer: Teddy Hogeborn
  • Date: 2008-08-04 20:43:31 UTC
  • mfrom: (24.1.17 mandos)
  • Revision ID: teddy@fukt.bsnet.se-20080804204331-zgu42g8ii997h1l2
* ca.pem: Removed.
* cert.pem: - '' -
* client-cert.pem: - '' -
* client-key.pem: - '' -
* crl.pem: - '' -
* key.pem: - '' -

* plugins.d/mandosclient.c (start_mandos_communication): Change "to"
                                    to be a union.  All users changed.

* server.py: Changed log severity for many log messages.
  (Client.__init__): Take all config file settins as a dict instead of
                     as keyword arguments.

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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
 
version = "1.0.7"
 
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
 
70
75
 
71
76
logger = logging.Logger('mandos')
72
 
syslogger = (logging.handlers.SysLogHandler
73
 
             (facility = logging.handlers.SysLogHandler.LOG_DAEMON,
74
 
              address = "/dev/log"))
75
 
syslogger.setFormatter(logging.Formatter
76
 
                       ('Mandos [%(process)d]: %(levelname)s:'
77
 
                        ' %(message)s'))
 
77
syslogger = logging.handlers.SysLogHandler\
 
78
            (facility = logging.handlers.SysLogHandler.LOG_DAEMON)
 
79
syslogger.setFormatter(logging.Formatter\
 
80
                        ('%(levelname)s: %(message)s'))
78
81
logger.addHandler(syslogger)
 
82
del syslogger
79
83
 
80
 
console = logging.StreamHandler()
81
 
console.setFormatter(logging.Formatter('%(name)s [%(process)d]:'
82
 
                                       ' %(levelname)s: %(message)s'))
83
 
logger.addHandler(console)
84
84
 
85
85
class AvahiError(Exception):
86
 
    def __init__(self, value, *args, **kwargs):
 
86
    def __init__(self, value):
87
87
        self.value = value
88
 
        super(AvahiError, self).__init__(value, *args, **kwargs)
89
 
    def __unicode__(self):
90
 
        return unicode(repr(self.value))
 
88
    def __str__(self):
 
89
        return repr(self.value)
91
90
 
92
91
class AvahiServiceError(AvahiError):
93
92
    pass
97
96
 
98
97
 
99
98
class AvahiService(object):
100
 
    """An Avahi (Zeroconf) service.
101
 
    Attributes:
 
99
    """
102
100
    interface: integer; avahi.IF_UNSPEC or an interface index.
103
101
               Used to optionally bind to the specified interface.
104
 
    name: string; Example: 'Mandos'
105
 
    type: string; Example: '_mandos._tcp'.
106
 
                  See <http://www.dns-sd.org/ServiceTypes.html>
107
 
    port: integer; what port to announce
108
 
    TXT: list of strings; TXT record for the service
109
 
    domain: string; Domain to publish on, default to .local if empty.
110
 
    host: string; Host to publish records for, default is localhost
111
 
    max_renames: integer; maximum number of renames
112
 
    rename_count: integer; counter so we only rename after collisions
113
 
                  a sensible number of times
 
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
114
113
    """
115
114
    def __init__(self, interface = avahi.IF_UNSPEC, name = None,
116
 
                 servicetype = None, port = None, TXT = None,
117
 
                 domain = "", host = "", max_renames = 32768,
118
 
                 protocol = avahi.PROTO_UNSPEC):
 
115
                 type = None, port = None, TXT = None, domain = "",
 
116
                 host = "", max_renames = 12):
 
117
        """An Avahi (Zeroconf) service. """
119
118
        self.interface = interface
120
119
        self.name = name
121
 
        self.type = servicetype
 
120
        self.type = type
122
121
        self.port = port
123
 
        self.TXT = TXT if TXT is not None else []
 
122
        if TXT is None:
 
123
            self.TXT = []
 
124
        else:
 
125
            self.TXT = TXT
124
126
        self.domain = domain
125
127
        self.host = host
126
128
        self.rename_count = 0
127
 
        self.max_renames = max_renames
128
 
        self.protocol = protocol
129
129
    def rename(self):
130
130
        """Derived from the Avahi example code"""
131
131
        if self.rename_count >= self.max_renames:
132
 
            logger.critical(u"No suitable Zeroconf service name found"
133
 
                            u" after %i retries, exiting.",
134
 
                            self.rename_count)
135
 
            raise AvahiServiceError(u"Too many renames")
136
 
        self.name = server.GetAlternativeServiceName(self.name)
137
 
        logger.info(u"Changing Zeroconf service name to %r ...",
138
 
                    str(self.name))
139
 
        syslogger.setFormatter(logging.Formatter
140
 
                               ('Mandos (%s): %%(levelname)s:'
141
 
                                ' %%(message)s' % self.name))
 
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.error(u"Changing name to %r ...", name)
142
137
        self.remove()
143
138
        self.add()
144
139
        self.rename_count += 1
150
145
        """Derived from the Avahi example code"""
151
146
        global group
152
147
        if group is None:
153
 
            group = dbus.Interface(bus.get_object
154
 
                                   (avahi.DBUS_NAME,
 
148
            group = dbus.Interface\
 
149
                    (bus.get_object(avahi.DBUS_NAME,
155
150
                                    server.EntryGroupNew()),
156
 
                                   avahi.DBUS_INTERFACE_ENTRY_GROUP)
 
151
                     avahi.DBUS_INTERFACE_ENTRY_GROUP)
157
152
            group.connect_to_signal('StateChanged',
158
153
                                    entry_group_state_changed)
159
 
        logger.debug(u"Adding Zeroconf service '%s' of type '%s' ...",
 
154
        logger.debug(u"Adding service '%s' of type '%s' ...",
160
155
                     service.name, service.type)
161
156
        group.AddService(
162
157
                self.interface,         # interface
163
 
                self.protocol,          # protocol
 
158
                avahi.PROTO_INET6,      # protocol
164
159
                dbus.UInt32(0),         # flags
165
160
                self.name, self.type,
166
161
                self.domain, self.host,
173
168
# End of Avahi example code
174
169
 
175
170
 
176
 
def _datetime_to_dbus(dt, variant_level=0):
177
 
    """Convert a UTC datetime.datetime() to a D-Bus type."""
178
 
    return dbus.String(dt.isoformat(), variant_level=variant_level)
179
 
 
180
 
 
181
 
class Client(dbus.service.Object):
 
171
class Client(object):
182
172
    """A representation of a client host served by this server.
183
173
    Attributes:
184
 
    name:       string; from the config file, used in log messages and
185
 
                        D-Bus identifiers
 
174
    name:      string; from the config file, used in log messages
186
175
    fingerprint: string (40 or 32 hexadecimal digits); used to
187
176
                 uniquely identify the client
188
 
    secret:     bytestring; sent verbatim (over TLS) to client
189
 
    host:       string; available for use by the checker command
190
 
    created:    datetime.datetime(); (UTC) object creation
191
 
    last_enabled: datetime.datetime(); (UTC)
192
 
    enabled:    bool()
193
 
    last_checked_ok: datetime.datetime(); (UTC) or None
194
 
    timeout:    datetime.timedelta(); How long from last_checked_ok
195
 
                                      until this client is invalid
196
 
    interval:   datetime.timedelta(); How often to start a new checker
197
 
    disable_hook:  If set, called by disable() as disable_hook(self)
198
 
    checker:    subprocess.Popen(); a running checker process used
199
 
                                    to see if the client lives.
200
 
                                    'None' if no process is running.
 
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.
201
188
    checker_initiator_tag: a gobject event source tag, or None
202
 
    disable_initiator_tag:    - '' -
 
189
    stop_initiator_tag:    - '' -
203
190
    checker_callback_tag:  - '' -
204
191
    checker_command: string; External command which is run to check if
205
192
                     client lives.  %() expansions are done at
206
193
                     runtime with vars(self) as dict, so that for
207
194
                     instance %(name)s can be used in the command.
208
 
    current_checker_command: string; current running checker_command
209
 
    use_dbus: bool(); Whether to provide D-Bus interface and signals
210
 
    dbus_object_path: dbus.ObjectPath ; only set if self.use_dbus
 
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: - '' -
211
200
    """
212
 
    def timeout_milliseconds(self):
213
 
        "Return the 'timeout' attribute in milliseconds"
214
 
        return ((self.timeout.days * 24 * 60 * 60 * 1000)
215
 
                + (self.timeout.seconds * 1000)
216
 
                + (self.timeout.microseconds // 1000))
217
 
    
218
 
    def interval_milliseconds(self):
219
 
        "Return the 'interval' attribute in milliseconds"
220
 
        return ((self.interval.days * 24 * 60 * 60 * 1000)
221
 
                + (self.interval.seconds * 1000)
222
 
                + (self.interval.microseconds // 1000))
223
 
    
224
 
    def __init__(self, name = None, disable_hook=None, config=None,
225
 
                 use_dbus=True):
226
 
        """Note: the 'checker' key in 'config' sets the
227
 
        'checker_command' attribute and *not* the 'checker'
228
 
        attribute."""
 
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, config={}):
 
225
        """Note: the 'checker' argument sets the 'checker_command'
 
226
        attribute and not the 'checker' attribute.."""
229
227
        self.name = name
230
 
        if config is None:
231
 
            config = {}
232
228
        logger.debug(u"Creating client %r", self.name)
233
 
        self.use_dbus = False   # During __init__
234
 
        # Uppercase and remove spaces from fingerprint for later
235
 
        # comparison purposes with return value from the fingerprint()
236
 
        # function
237
 
        self.fingerprint = (config["fingerprint"].upper()
238
 
                            .replace(u" ", u""))
 
229
        # Uppercase and remove spaces from fingerprint
 
230
        # for later comparison purposes with return value of
 
231
        # the fingerprint() function
 
232
        self.fingerprint = config["fingerprint"].upper()\
 
233
                           .replace(u" ", u"")
239
234
        logger.debug(u"  Fingerprint: %s", self.fingerprint)
240
235
        if "secret" in config:
241
236
            self.secret = config["secret"].decode(u"base64")
242
237
        elif "secfile" in config:
243
 
            with closing(open(os.path.expanduser
244
 
                              (os.path.expandvars
245
 
                               (config["secfile"])))) as secfile:
246
 
                self.secret = secfile.read()
 
238
            sf = open(config["secfile"])
 
239
            self.secret = sf.read()
 
240
            sf.close()
247
241
        else:
248
242
            raise TypeError(u"No secret or secfile for client %s"
249
243
                            % self.name)
250
 
        self.host = config.get("host", "")
251
 
        self.created = datetime.datetime.utcnow()
252
 
        self.enabled = False
253
 
        self.last_enabled = None
 
244
        self.fqdn = config.get("fqdn", "")
 
245
        self.created = datetime.datetime.now()
254
246
        self.last_checked_ok = None
255
247
        self.timeout = string_to_delta(config["timeout"])
256
248
        self.interval = string_to_delta(config["interval"])
257
 
        self.disable_hook = disable_hook
 
249
        self.stop_hook = stop_hook
258
250
        self.checker = None
259
251
        self.checker_initiator_tag = None
260
 
        self.disable_initiator_tag = None
 
252
        self.stop_initiator_tag = None
261
253
        self.checker_callback_tag = None
262
 
        self.checker_command = config["checker"]
263
 
        self.current_checker_command = None
264
 
        self.last_connect = None
265
 
        # Only now, when this client is initialized, can it show up on
266
 
        # the D-Bus
267
 
        self.use_dbus = use_dbus
268
 
        if self.use_dbus:
269
 
            self.dbus_object_path = (dbus.ObjectPath
270
 
                                     ("/clients/"
271
 
                                      + self.name.replace(".", "_")))
272
 
            dbus.service.Object.__init__(self, bus,
273
 
                                         self.dbus_object_path)
274
 
    
275
 
    def enable(self):
 
254
        self.check_command = config["checker"]
 
255
    def start(self):
276
256
        """Start this client's checker and timeout hooks"""
277
 
        self.last_enabled = datetime.datetime.utcnow()
278
257
        # Schedule a new checker to be started an 'interval' from now,
279
258
        # and every interval from then on.
280
 
        self.checker_initiator_tag = (gobject.timeout_add
281
 
                                      (self.interval_milliseconds(),
282
 
                                       self.start_checker))
 
259
        self.checker_initiator_tag = gobject.timeout_add\
 
260
                                     (self._interval_milliseconds,
 
261
                                      self.start_checker)
283
262
        # Also start a new checker *right now*.
284
263
        self.start_checker()
285
 
        # Schedule a disable() when 'timeout' has passed
286
 
        self.disable_initiator_tag = (gobject.timeout_add
287
 
                                   (self.timeout_milliseconds(),
288
 
                                    self.disable))
289
 
        self.enabled = True
290
 
        if self.use_dbus:
291
 
            # Emit D-Bus signals
292
 
            self.PropertyChanged(dbus.String(u"enabled"),
293
 
                                 dbus.Boolean(True, variant_level=1))
294
 
            self.PropertyChanged(dbus.String(u"last_enabled"),
295
 
                                 (_datetime_to_dbus(self.last_enabled,
296
 
                                                    variant_level=1)))
297
 
    
298
 
    def disable(self):
299
 
        """Disable this client."""
300
 
        if not getattr(self, "enabled", False):
 
264
        # Schedule a stop() when 'timeout' has passed
 
265
        self.stop_initiator_tag = gobject.timeout_add\
 
266
                                  (self._timeout_milliseconds,
 
267
                                   self.stop)
 
268
    def stop(self):
 
269
        """Stop this client.
 
270
        The possibility that a client might be restarted is left open,
 
271
        but not currently used."""
 
272
        # If this client doesn't have a secret, it is already stopped.
 
273
        if self.secret:
 
274
            logger.info(u"Stopping client %s", self.name)
 
275
            self.secret = None
 
276
        else:
301
277
            return False
302
 
        logger.info(u"Disabling client %s", self.name)
303
 
        if getattr(self, "disable_initiator_tag", False):
304
 
            gobject.source_remove(self.disable_initiator_tag)
305
 
            self.disable_initiator_tag = None
 
278
        if getattr(self, "stop_initiator_tag", False):
 
279
            gobject.source_remove(self.stop_initiator_tag)
 
280
            self.stop_initiator_tag = None
306
281
        if getattr(self, "checker_initiator_tag", False):
307
282
            gobject.source_remove(self.checker_initiator_tag)
308
283
            self.checker_initiator_tag = None
309
284
        self.stop_checker()
310
 
        if self.disable_hook:
311
 
            self.disable_hook(self)
312
 
        self.enabled = False
313
 
        if self.use_dbus:
314
 
            # Emit D-Bus signal
315
 
            self.PropertyChanged(dbus.String(u"enabled"),
316
 
                                 dbus.Boolean(False, variant_level=1))
 
285
        if self.stop_hook:
 
286
            self.stop_hook(self)
317
287
        # Do not run this again if called by a gobject.timeout_add
318
288
        return False
319
 
    
320
289
    def __del__(self):
321
 
        self.disable_hook = None
322
 
        self.disable()
323
 
    
324
 
    def checker_callback(self, pid, condition, command):
 
290
        self.stop_hook = None
 
291
        self.stop()
 
292
    def checker_callback(self, pid, condition):
325
293
        """The checker has completed, so take appropriate actions."""
 
294
        now = datetime.datetime.now()
326
295
        self.checker_callback_tag = None
327
296
        self.checker = None
328
 
        if self.use_dbus:
329
 
            # Emit D-Bus signal
330
 
            self.PropertyChanged(dbus.String(u"checker_running"),
331
 
                                 dbus.Boolean(False, variant_level=1))
332
 
        if os.WIFEXITED(condition):
333
 
            exitstatus = os.WEXITSTATUS(condition)
334
 
            if exitstatus == 0:
335
 
                logger.info(u"Checker for %(name)s succeeded",
336
 
                            vars(self))
337
 
                self.checked_ok()
338
 
            else:
339
 
                logger.info(u"Checker for %(name)s failed",
340
 
                            vars(self))
341
 
            if self.use_dbus:
342
 
                # Emit D-Bus signal
343
 
                self.CheckerCompleted(dbus.Int16(exitstatus),
344
 
                                      dbus.Int64(condition),
345
 
                                      dbus.String(command))
346
 
        else:
 
297
        if os.WIFEXITED(condition) \
 
298
               and (os.WEXITSTATUS(condition) == 0):
 
299
            logger.info(u"Checker for %(name)s succeeded",
 
300
                        vars(self))
 
301
            self.last_checked_ok = now
 
302
            gobject.source_remove(self.stop_initiator_tag)
 
303
            self.stop_initiator_tag = gobject.timeout_add\
 
304
                                      (self._timeout_milliseconds,
 
305
                                       self.stop)
 
306
        elif not os.WIFEXITED(condition):
347
307
            logger.warning(u"Checker for %(name)s crashed?",
348
308
                           vars(self))
349
 
            if self.use_dbus:
350
 
                # Emit D-Bus signal
351
 
                self.CheckerCompleted(dbus.Int16(-1),
352
 
                                      dbus.Int64(condition),
353
 
                                      dbus.String(command))
354
 
    
355
 
    def checked_ok(self):
356
 
        """Bump up the timeout for this client.
357
 
        This should only be called when the client has been seen,
358
 
        alive and well.
359
 
        """
360
 
        self.last_checked_ok = datetime.datetime.utcnow()
361
 
        gobject.source_remove(self.disable_initiator_tag)
362
 
        self.disable_initiator_tag = (gobject.timeout_add
363
 
                                      (self.timeout_milliseconds(),
364
 
                                       self.disable))
365
 
        if self.use_dbus:
366
 
            # Emit D-Bus signal
367
 
            self.PropertyChanged(
368
 
                dbus.String(u"last_checked_ok"),
369
 
                (_datetime_to_dbus(self.last_checked_ok,
370
 
                                   variant_level=1)))
371
 
    
 
309
        else:
 
310
            logger.info(u"Checker for %(name)s failed",
 
311
                        vars(self))
372
312
    def start_checker(self):
373
313
        """Start a new checker subprocess if one is not running.
374
314
        If a checker already exists, leave it running and do
381
321
        # checkers alone, the checker would have to take more time
382
322
        # than 'timeout' for the client to be declared invalid, which
383
323
        # is as it should be.
384
 
        
385
 
        # If a checker exists, make sure it is not a zombie
386
 
        if self.checker is not None:
387
 
            pid, status = os.waitpid(self.checker.pid, os.WNOHANG)
388
 
            if pid:
389
 
                logger.warning("Checker was a zombie")
390
 
                gobject.source_remove(self.checker_callback_tag)
391
 
                self.checker_callback(pid, status,
392
 
                                      self.current_checker_command)
393
 
        # Start a new checker if needed
394
324
        if self.checker is None:
395
325
            try:
396
 
                # In case checker_command has exactly one % operator
397
 
                command = self.checker_command % self.host
 
326
                # In case check_command has exactly one % operator
 
327
                command = self.check_command % self.fqdn
398
328
            except TypeError:
399
329
                # Escape attributes for the shell
400
330
                escaped_attrs = dict((key, re.escape(str(val)))
401
331
                                     for key, val in
402
332
                                     vars(self).iteritems())
403
333
                try:
404
 
                    command = self.checker_command % escaped_attrs
 
334
                    command = self.check_command % escaped_attrs
405
335
                except TypeError, error:
406
336
                    logger.error(u'Could not format string "%s":'
407
 
                                 u' %s', self.checker_command, error)
 
337
                                 u' %s', self.check_command, error)
408
338
                    return True # Try again later
409
 
                self.current_checker_command = command
410
339
            try:
411
340
                logger.info(u"Starting checker %r for %s",
412
341
                            command, self.name)
413
 
                # We don't need to redirect stdout and stderr, since
414
 
                # in normal mode, that is already done by daemon(),
415
 
                # and in debug mode we don't want to.  (Stdin is
416
 
                # always replaced by /dev/null.)
417
342
                self.checker = subprocess.Popen(command,
418
343
                                                close_fds=True,
419
344
                                                shell=True, cwd="/")
420
 
                if self.use_dbus:
421
 
                    # Emit D-Bus signal
422
 
                    self.CheckerStarted(command)
423
 
                    self.PropertyChanged(
424
 
                        dbus.String("checker_running"),
425
 
                        dbus.Boolean(True, variant_level=1))
426
 
                self.checker_callback_tag = (gobject.child_watch_add
427
 
                                             (self.checker.pid,
428
 
                                              self.checker_callback,
429
 
                                              data=command))
430
 
                # The checker may have completed before the gobject
431
 
                # watch was added.  Check for this.
432
 
                pid, status = os.waitpid(self.checker.pid, os.WNOHANG)
433
 
                if pid:
434
 
                    gobject.source_remove(self.checker_callback_tag)
435
 
                    self.checker_callback(pid, status, command)
436
 
            except OSError, error:
 
345
                self.checker_callback_tag = gobject.child_watch_add\
 
346
                                            (self.checker.pid,
 
347
                                             self.checker_callback)
 
348
            except subprocess.OSError, error:
437
349
                logger.error(u"Failed to start subprocess: %s",
438
350
                             error)
439
351
        # Re-run this periodically if run by gobject.timeout_add
440
352
        return True
441
 
    
442
353
    def stop_checker(self):
443
354
        """Force the checker process, if any, to stop."""
444
355
        if self.checker_callback_tag:
446
357
            self.checker_callback_tag = None
447
358
        if getattr(self, "checker", None) is None:
448
359
            return
449
 
        logger.debug(u"Stopping checker for %(name)s", vars(self))
 
360
        logger.debug("Stopping checker for %(name)s", vars(self))
450
361
        try:
451
362
            os.kill(self.checker.pid, signal.SIGTERM)
452
363
            #os.sleep(0.5)
456
367
            if error.errno != errno.ESRCH: # No such process
457
368
                raise
458
369
        self.checker = None
459
 
        if self.use_dbus:
460
 
            self.PropertyChanged(dbus.String(u"checker_running"),
461
 
                                 dbus.Boolean(False, variant_level=1))
462
 
    
463
370
    def still_valid(self):
464
371
        """Has the timeout not yet passed for this client?"""
465
 
        if not getattr(self, "enabled", False):
466
 
            return False
467
 
        now = datetime.datetime.utcnow()
 
372
        now = datetime.datetime.now()
468
373
        if self.last_checked_ok is None:
469
374
            return now < (self.created + self.timeout)
470
375
        else:
471
376
            return now < (self.last_checked_ok + self.timeout)
472
 
    
473
 
    ## D-Bus methods & signals
474
 
    _interface = u"se.bsnet.fukt.Mandos.Client"
475
 
    
476
 
    # CheckedOK - method
477
 
    CheckedOK = dbus.service.method(_interface)(checked_ok)
478
 
    CheckedOK.__name__ = "CheckedOK"
479
 
    
480
 
    # CheckerCompleted - signal
481
 
    @dbus.service.signal(_interface, signature="nxs")
482
 
    def CheckerCompleted(self, exitcode, waitstatus, command):
483
 
        "D-Bus signal"
484
 
        pass
485
 
    
486
 
    # CheckerStarted - signal
487
 
    @dbus.service.signal(_interface, signature="s")
488
 
    def CheckerStarted(self, command):
489
 
        "D-Bus signal"
490
 
        pass
491
 
    
492
 
    # GetAllProperties - method
493
 
    @dbus.service.method(_interface, out_signature="a{sv}")
494
 
    def GetAllProperties(self):
495
 
        "D-Bus method"
496
 
        return dbus.Dictionary({
497
 
                dbus.String("name"):
498
 
                    dbus.String(self.name, variant_level=1),
499
 
                dbus.String("fingerprint"):
500
 
                    dbus.String(self.fingerprint, variant_level=1),
501
 
                dbus.String("host"):
502
 
                    dbus.String(self.host, variant_level=1),
503
 
                dbus.String("created"):
504
 
                    _datetime_to_dbus(self.created, variant_level=1),
505
 
                dbus.String("last_enabled"):
506
 
                    (_datetime_to_dbus(self.last_enabled,
507
 
                                       variant_level=1)
508
 
                     if self.last_enabled is not None
509
 
                     else dbus.Boolean(False, variant_level=1)),
510
 
                dbus.String("enabled"):
511
 
                    dbus.Boolean(self.enabled, variant_level=1),
512
 
                dbus.String("last_checked_ok"):
513
 
                    (_datetime_to_dbus(self.last_checked_ok,
514
 
                                       variant_level=1)
515
 
                     if self.last_checked_ok is not None
516
 
                     else dbus.Boolean (False, variant_level=1)),
517
 
                dbus.String("timeout"):
518
 
                    dbus.UInt64(self.timeout_milliseconds(),
519
 
                                variant_level=1),
520
 
                dbus.String("interval"):
521
 
                    dbus.UInt64(self.interval_milliseconds(),
522
 
                                variant_level=1),
523
 
                dbus.String("checker"):
524
 
                    dbus.String(self.checker_command,
525
 
                                variant_level=1),
526
 
                dbus.String("checker_running"):
527
 
                    dbus.Boolean(self.checker is not None,
528
 
                                 variant_level=1),
529
 
                dbus.String("object_path"):
530
 
                    dbus.ObjectPath(self.dbus_object_path,
531
 
                                    variant_level=1)
532
 
                }, signature="sv")
533
 
    
534
 
    # IsStillValid - method
535
 
    IsStillValid = (dbus.service.method(_interface, out_signature="b")
536
 
                    (still_valid))
537
 
    IsStillValid.__name__ = "IsStillValid"
538
 
    
539
 
    # PropertyChanged - signal
540
 
    @dbus.service.signal(_interface, signature="sv")
541
 
    def PropertyChanged(self, property, value):
542
 
        "D-Bus signal"
543
 
        pass
544
 
    
545
 
    # SetChecker - method
546
 
    @dbus.service.method(_interface, in_signature="s")
547
 
    def SetChecker(self, checker):
548
 
        "D-Bus setter method"
549
 
        self.checker_command = checker
550
 
        # Emit D-Bus signal
551
 
        self.PropertyChanged(dbus.String(u"checker"),
552
 
                             dbus.String(self.checker_command,
553
 
                                         variant_level=1))
554
 
    
555
 
    # SetHost - method
556
 
    @dbus.service.method(_interface, in_signature="s")
557
 
    def SetHost(self, host):
558
 
        "D-Bus setter method"
559
 
        self.host = host
560
 
        # Emit D-Bus signal
561
 
        self.PropertyChanged(dbus.String(u"host"),
562
 
                             dbus.String(self.host, variant_level=1))
563
 
    
564
 
    # SetInterval - method
565
 
    @dbus.service.method(_interface, in_signature="t")
566
 
    def SetInterval(self, milliseconds):
567
 
        self.interval = datetime.timedelta(0, 0, 0, milliseconds)
568
 
        # Emit D-Bus signal
569
 
        self.PropertyChanged(dbus.String(u"interval"),
570
 
                             (dbus.UInt64(self.interval_milliseconds(),
571
 
                                          variant_level=1)))
572
 
    
573
 
    # SetSecret - method
574
 
    @dbus.service.method(_interface, in_signature="ay",
575
 
                         byte_arrays=True)
576
 
    def SetSecret(self, secret):
577
 
        "D-Bus setter method"
578
 
        self.secret = str(secret)
579
 
    
580
 
    # SetTimeout - method
581
 
    @dbus.service.method(_interface, in_signature="t")
582
 
    def SetTimeout(self, milliseconds):
583
 
        self.timeout = datetime.timedelta(0, 0, 0, milliseconds)
584
 
        # Emit D-Bus signal
585
 
        self.PropertyChanged(dbus.String(u"timeout"),
586
 
                             (dbus.UInt64(self.timeout_milliseconds(),
587
 
                                          variant_level=1)))
588
 
    
589
 
    # Enable - method
590
 
    Enable = dbus.service.method(_interface)(enable)
591
 
    Enable.__name__ = "Enable"
592
 
    
593
 
    # StartChecker - method
594
 
    @dbus.service.method(_interface)
595
 
    def StartChecker(self):
596
 
        "D-Bus method"
597
 
        self.start_checker()
598
 
    
599
 
    # Disable - method
600
 
    @dbus.service.method(_interface)
601
 
    def Disable(self):
602
 
        "D-Bus method"
603
 
        self.disable()
604
 
    
605
 
    # StopChecker - method
606
 
    StopChecker = dbus.service.method(_interface)(stop_checker)
607
 
    StopChecker.__name__ = "StopChecker"
608
 
    
609
 
    del _interface
610
377
 
611
378
 
612
379
def peer_certificate(session):
613
380
    "Return the peer's OpenPGP certificate as a bytestring"
614
381
    # If not an OpenPGP certificate...
615
 
    if (gnutls.library.functions
616
 
        .gnutls_certificate_type_get(session._c_object)
617
 
        != gnutls.library.constants.GNUTLS_CRT_OPENPGP):
 
382
    if gnutls.library.functions.gnutls_certificate_type_get\
 
383
            (session._c_object) \
 
384
           != gnutls.library.constants.GNUTLS_CRT_OPENPGP:
618
385
        # ...do the normal thing
619
386
        return session.peer_certificate
620
 
    list_size = ctypes.c_uint(1)
621
 
    cert_list = (gnutls.library.functions
622
 
                 .gnutls_certificate_get_peers
623
 
                 (session._c_object, ctypes.byref(list_size)))
624
 
    if not bool(cert_list) and list_size.value != 0:
625
 
        raise gnutls.errors.GNUTLSError("error getting peer"
626
 
                                        " certificate")
 
387
    list_size = ctypes.c_uint()
 
388
    cert_list = gnutls.library.functions.gnutls_certificate_get_peers\
 
389
        (session._c_object, ctypes.byref(list_size))
627
390
    if list_size.value == 0:
628
391
        return None
629
392
    cert = cert_list[0]
632
395
 
633
396
def fingerprint(openpgp):
634
397
    "Convert an OpenPGP bytestring to a hexdigit fingerprint string"
635
 
    # New GnuTLS "datum" with the OpenPGP public key
636
 
    datum = (gnutls.library.types
637
 
             .gnutls_datum_t(ctypes.cast(ctypes.c_char_p(openpgp),
638
 
                                         ctypes.POINTER
639
 
                                         (ctypes.c_ubyte)),
640
 
                             ctypes.c_uint(len(openpgp))))
641
398
    # New empty GnuTLS certificate
642
399
    crt = gnutls.library.types.gnutls_openpgp_crt_t()
643
 
    (gnutls.library.functions
644
 
     .gnutls_openpgp_crt_init(ctypes.byref(crt)))
 
400
    gnutls.library.functions.gnutls_openpgp_crt_init\
 
401
        (ctypes.byref(crt))
 
402
    # New GnuTLS "datum" with the OpenPGP public key
 
403
    datum = gnutls.library.types.gnutls_datum_t\
 
404
        (ctypes.cast(ctypes.c_char_p(openpgp),
 
405
                     ctypes.POINTER(ctypes.c_ubyte)),
 
406
         ctypes.c_uint(len(openpgp)))
645
407
    # Import the OpenPGP public key into the certificate
646
 
    (gnutls.library.functions
647
 
     .gnutls_openpgp_crt_import(crt, ctypes.byref(datum),
648
 
                                gnutls.library.constants
649
 
                                .GNUTLS_OPENPGP_FMT_RAW))
650
 
    # Verify the self signature in the key
651
 
    crtverify = ctypes.c_uint()
652
 
    (gnutls.library.functions
653
 
     .gnutls_openpgp_crt_verify_self(crt, 0, ctypes.byref(crtverify)))
654
 
    if crtverify.value != 0:
655
 
        gnutls.library.functions.gnutls_openpgp_crt_deinit(crt)
656
 
        raise gnutls.errors.CertificateSecurityError("Verify failed")
 
408
    ret = gnutls.library.functions.gnutls_openpgp_crt_import\
 
409
        (crt,
 
410
         ctypes.byref(datum),
 
411
         gnutls.library.constants.GNUTLS_OPENPGP_FMT_RAW)
657
412
    # New buffer for the fingerprint
658
 
    buf = ctypes.create_string_buffer(20)
659
 
    buf_len = ctypes.c_size_t()
 
413
    buffer = ctypes.create_string_buffer(20)
 
414
    buffer_length = ctypes.c_size_t()
660
415
    # Get the fingerprint from the certificate into the buffer
661
 
    (gnutls.library.functions
662
 
     .gnutls_openpgp_crt_get_fingerprint(crt, ctypes.byref(buf),
663
 
                                         ctypes.byref(buf_len)))
 
416
    gnutls.library.functions.gnutls_openpgp_crt_get_fingerprint\
 
417
        (crt, ctypes.byref(buffer), ctypes.byref(buffer_length))
664
418
    # Deinit the certificate
665
419
    gnutls.library.functions.gnutls_openpgp_crt_deinit(crt)
666
420
    # Convert the buffer to a Python bytestring
667
 
    fpr = ctypes.string_at(buf, buf_len.value)
 
421
    fpr = ctypes.string_at(buffer, buffer_length.value)
668
422
    # Convert the bytestring to hexadecimal notation
669
423
    hex_fpr = u''.join(u"%02X" % ord(char) for char in fpr)
670
424
    return hex_fpr
671
425
 
672
426
 
673
 
class TCP_handler(SocketServer.BaseRequestHandler, object):
 
427
class tcp_handler(SocketServer.BaseRequestHandler, object):
674
428
    """A TCP request handler class.
675
429
    Instantiated by IPv6_TCPServer for each request to handle it.
676
430
    Note: This will run in its own forked process."""
677
431
    
678
432
    def handle(self):
679
433
        logger.info(u"TCP connection from: %s",
680
 
                    unicode(self.client_address))
681
 
        session = (gnutls.connection
682
 
                   .ClientSession(self.request,
683
 
                                  gnutls.connection
684
 
                                  .X509Credentials()))
 
434
                     unicode(self.client_address))
 
435
        session = gnutls.connection.ClientSession\
 
436
                  (self.request, gnutls.connection.X509Credentials())
685
437
        
686
438
        line = self.request.makefile().readline()
687
439
        logger.debug(u"Protocol version: %r", line)
698
450
        # using OpenPGP certificates.
699
451
        
700
452
        #priority = ':'.join(("NONE", "+VERS-TLS1.1", "+AES-256-CBC",
701
 
        #                     "+SHA1", "+COMP-NULL", "+CTYPE-OPENPGP",
702
 
        #                     "+DHE-DSS"))
703
 
        # Use a fallback default, since this MUST be set.
704
 
        priority = self.server.settings.get("priority", "NORMAL")
705
 
        (gnutls.library.functions
706
 
         .gnutls_priority_set_direct(session._c_object,
707
 
                                     priority, None))
 
453
        #                "+SHA1", "+COMP-NULL", "+CTYPE-OPENPGP",
 
454
        #                "+DHE-DSS"))
 
455
        priority = "NORMAL"             # Fallback default, since this
 
456
                                        # MUST be set.
 
457
        if self.server.settings["priority"]:
 
458
            priority = self.server.settings["priority"]
 
459
        gnutls.library.functions.gnutls_priority_set_direct\
 
460
            (session._c_object, priority, None);
708
461
        
709
462
        try:
710
463
            session.handshake()
713
466
            # Do not run session.bye() here: the session is not
714
467
            # established.  Just abandon the request.
715
468
            return
716
 
        logger.debug(u"Handshake succeeded")
717
469
        try:
718
470
            fpr = fingerprint(peer_certificate(session))
719
471
        except (TypeError, gnutls.errors.GNUTLSError), error:
721
473
            session.bye()
722
474
            return
723
475
        logger.debug(u"Fingerprint: %s", fpr)
724
 
        
 
476
        client = None
725
477
        for c in self.server.clients:
726
478
            if c.fingerprint == fpr:
727
479
                client = c
728
480
                break
729
 
        else:
 
481
        if not client:
730
482
            logger.warning(u"Client not found for fingerprint: %s",
731
483
                           fpr)
732
484
            session.bye()
739
491
                           vars(client))
740
492
            session.bye()
741
493
            return
742
 
        ## This won't work here, since we're in a fork.
743
 
        # client.checked_ok()
744
494
        sent_size = 0
745
495
        while sent_size < len(client.secret):
746
496
            sent = session.send(client.secret[sent_size:])
751
501
        session.bye()
752
502
 
753
503
 
754
 
class IPv6_TCPServer(SocketServer.ForkingMixIn,
755
 
                     SocketServer.TCPServer, object):
756
 
    """IPv6-capable TCP server.  Accepts 'None' as address and/or port
 
504
class IPv6_TCPServer(SocketServer.ForkingTCPServer, object):
 
505
    """IPv6 TCP server.  Accepts 'None' as address and/or port.
757
506
    Attributes:
758
507
        settings:       Server settings
759
508
        clients:        Set() of Client objects
760
 
        enabled:        Boolean; whether this server is activated yet
761
509
    """
762
510
    address_family = socket.AF_INET6
763
511
    def __init__(self, *args, **kwargs):
767
515
        if "clients" in kwargs:
768
516
            self.clients = kwargs["clients"]
769
517
            del kwargs["clients"]
770
 
        if "use_ipv6" in kwargs:
771
 
            if not kwargs["use_ipv6"]:
772
 
                self.address_family = socket.AF_INET
773
 
            del kwargs["use_ipv6"]
774
 
        self.enabled = False
775
 
        super(IPv6_TCPServer, self).__init__(*args, **kwargs)
 
518
        return super(type(self), self).__init__(*args, **kwargs)
776
519
    def server_bind(self):
777
520
        """This overrides the normal server_bind() function
778
521
        to bind to an interface if one was specified, and also NOT to
790
533
                                 u" bind to interface %s",
791
534
                                 self.settings["interface"])
792
535
                else:
793
 
                    raise
 
536
                    raise error
794
537
        # Only bind(2) the socket if we really need to.
795
538
        if self.server_address[0] or self.server_address[1]:
796
539
            if not self.server_address[0]:
797
 
                if self.address_family == socket.AF_INET6:
798
 
                    any_address = "::" # in6addr_any
799
 
                else:
800
 
                    any_address = socket.INADDR_ANY
801
 
                self.server_address = (any_address,
 
540
                in6addr_any = "::"
 
541
                self.server_address = (in6addr_any,
802
542
                                       self.server_address[1])
803
 
            elif not self.server_address[1]:
 
543
            elif self.server_address[1] is None:
804
544
                self.server_address = (self.server_address[0],
805
545
                                       0)
806
 
#                 if self.settings["interface"]:
807
 
#                     self.server_address = (self.server_address[0],
808
 
#                                            0, # port
809
 
#                                            0, # flowinfo
810
 
#                                            if_nametoindex
811
 
#                                            (self.settings
812
 
#                                             ["interface"]))
813
 
            return super(IPv6_TCPServer, self).server_bind()
814
 
    def server_activate(self):
815
 
        if self.enabled:
816
 
            return super(IPv6_TCPServer, self).server_activate()
817
 
    def enable(self):
818
 
        self.enabled = True
 
546
            return super(type(self), self).server_bind()
819
547
 
820
548
 
821
549
def string_to_delta(interval):
822
550
    """Parse a string and return a datetime.timedelta
823
 
    
 
551
 
824
552
    >>> string_to_delta('7d')
825
553
    datetime.timedelta(7)
826
554
    >>> string_to_delta('60s')
831
559
    datetime.timedelta(1)
832
560
    >>> string_to_delta(u'1w')
833
561
    datetime.timedelta(7)
834
 
    >>> string_to_delta('5m 30s')
835
 
    datetime.timedelta(0, 330)
836
562
    """
837
 
    timevalue = datetime.timedelta(0)
838
 
    for s in interval.split():
839
 
        try:
840
 
            suffix = unicode(s[-1])
841
 
            value = int(s[:-1])
842
 
            if suffix == u"d":
843
 
                delta = datetime.timedelta(value)
844
 
            elif suffix == u"s":
845
 
                delta = datetime.timedelta(0, value)
846
 
            elif suffix == u"m":
847
 
                delta = datetime.timedelta(0, 0, 0, 0, value)
848
 
            elif suffix == u"h":
849
 
                delta = datetime.timedelta(0, 0, 0, 0, 0, value)
850
 
            elif suffix == u"w":
851
 
                delta = datetime.timedelta(0, 0, 0, 0, 0, 0, value)
852
 
            else:
853
 
                raise ValueError
854
 
        except (ValueError, IndexError):
 
563
    try:
 
564
        suffix=unicode(interval[-1])
 
565
        value=int(interval[:-1])
 
566
        if suffix == u"d":
 
567
            delta = datetime.timedelta(value)
 
568
        elif suffix == u"s":
 
569
            delta = datetime.timedelta(0, value)
 
570
        elif suffix == u"m":
 
571
            delta = datetime.timedelta(0, 0, 0, 0, value)
 
572
        elif suffix == u"h":
 
573
            delta = datetime.timedelta(0, 0, 0, 0, 0, value)
 
574
        elif suffix == u"w":
 
575
            delta = datetime.timedelta(0, 0, 0, 0, 0, 0, value)
 
576
        else:
855
577
            raise ValueError
856
 
        timevalue += delta
857
 
    return timevalue
 
578
    except (ValueError, IndexError):
 
579
        raise ValueError
 
580
    return delta
858
581
 
859
582
 
860
583
def server_state_changed(state):
861
584
    """Derived from the Avahi example code"""
862
585
    if state == avahi.SERVER_COLLISION:
863
 
        logger.error(u"Zeroconf server name collision")
 
586
        logger.error(u"Server name collision")
864
587
        service.remove()
865
588
    elif state == avahi.SERVER_RUNNING:
866
589
        service.add()
868
591
 
869
592
def entry_group_state_changed(state, error):
870
593
    """Derived from the Avahi example code"""
871
 
    logger.debug(u"Avahi state change: %i", state)
 
594
    logger.debug(u"state change: %i", state)
872
595
    
873
596
    if state == avahi.ENTRY_GROUP_ESTABLISHED:
874
 
        logger.debug(u"Zeroconf service established.")
 
597
        logger.debug(u"Service established.")
875
598
    elif state == avahi.ENTRY_GROUP_COLLISION:
876
 
        logger.warning(u"Zeroconf service name collision.")
 
599
        logger.warning(u"Service name collision.")
877
600
        service.rename()
878
601
    elif state == avahi.ENTRY_GROUP_FAILURE:
879
 
        logger.critical(u"Avahi: Error in group state changed %s",
 
602
        logger.critical(u"Error in group state changed %s",
880
603
                        unicode(error))
881
 
        raise AvahiGroupError(u"State changed: %s" % unicode(error))
 
604
        raise AvahiGroupError("State changed: %s", str(error))
882
605
 
883
606
def if_nametoindex(interface):
884
607
    """Call the C function if_nametoindex(), or equivalent"""
885
608
    global if_nametoindex
886
609
    try:
887
 
        if_nametoindex = (ctypes.cdll.LoadLibrary
888
 
                          (ctypes.util.find_library("c"))
889
 
                          .if_nametoindex)
 
610
        if "ctypes.util" not in sys.modules:
 
611
            import ctypes.util
 
612
        if_nametoindex = ctypes.cdll.LoadLibrary\
 
613
            (ctypes.util.find_library("c")).if_nametoindex
890
614
    except (OSError, AttributeError):
891
615
        if "struct" not in sys.modules:
892
616
            import struct
895
619
        def if_nametoindex(interface):
896
620
            "Get an interface index the hard way, i.e. using fcntl()"
897
621
            SIOCGIFINDEX = 0x8933  # From /usr/include/linux/sockios.h
898
 
            with closing(socket.socket()) as s:
899
 
                ifreq = fcntl.ioctl(s, SIOCGIFINDEX,
900
 
                                    struct.pack("16s16x", interface))
 
622
            s = socket.socket()
 
623
            ifreq = fcntl.ioctl(s, SIOCGIFINDEX,
 
624
                                struct.pack("16s16x", interface))
 
625
            s.close()
901
626
            interface_index = struct.unpack("I", ifreq[16:20])[0]
902
627
            return interface_index
903
628
    return if_nametoindex(interface)
904
629
 
905
630
 
906
 
def daemon(nochdir = False, noclose = False):
 
631
def daemon(nochdir, noclose):
907
632
    """See daemon(3).  Standard BSD Unix function.
908
633
    This should really exist as os.daemon, but it doesn't (yet)."""
909
634
    if os.fork():
911
636
    os.setsid()
912
637
    if not nochdir:
913
638
        os.chdir("/")
914
 
    if os.fork():
915
 
        sys.exit()
916
639
    if not noclose:
917
640
        # Close all standard open file descriptors
918
641
        null = os.open(os.path.devnull, os.O_NOCTTY | os.O_RDWR)
927
650
 
928
651
 
929
652
def main():
930
 
    parser = optparse.OptionParser(version = "%%prog %s" % version)
 
653
    global main_loop_started
 
654
    main_loop_started = False
 
655
    
 
656
    parser = OptionParser()
931
657
    parser.add_option("-i", "--interface", type="string",
932
658
                      metavar="IF", help="Bind to interface IF")
933
659
    parser.add_option("-a", "--address", type="string",
934
660
                      help="Address to listen for requests on")
935
661
    parser.add_option("-p", "--port", type="int",
936
662
                      help="Port number to receive requests on")
937
 
    parser.add_option("--check", action="store_true",
 
663
    parser.add_option("--check", action="store_true", default=False,
938
664
                      help="Run self-test")
939
 
    parser.add_option("--debug", action="store_true",
 
665
    parser.add_option("--debug", action="store_true", default=False,
940
666
                      help="Debug mode; run in foreground and log to"
941
667
                      " terminal")
942
668
    parser.add_option("--priority", type="string", help="GnuTLS"
947
673
                      default="/etc/mandos", metavar="DIR",
948
674
                      help="Directory to search for configuration"
949
675
                      " files")
950
 
    parser.add_option("--no-dbus", action="store_false",
951
 
                      dest="use_dbus",
952
 
                      help="Do not provide D-Bus system bus"
953
 
                      " interface")
954
 
    parser.add_option("--no-ipv6", action="store_false",
955
 
                      dest="use_ipv6", help="Do not use IPv6")
956
 
    options = parser.parse_args()[0]
 
676
    (options, args) = parser.parse_args()
957
677
    
958
678
    if options.check:
959
679
        import doctest
968
688
                        "priority":
969
689
                        "SECURE256:!CTYPE-X.509:+CTYPE-OPENPGP",
970
690
                        "servicename": "Mandos",
971
 
                        "use_dbus": "True",
972
 
                        "use_ipv6": "True",
973
691
                        }
974
692
    
975
693
    # Parse config file for server-global settings
976
694
    server_config = ConfigParser.SafeConfigParser(server_defaults)
977
695
    del server_defaults
978
 
    server_config.read(os.path.join(options.configdir, "mandos.conf"))
 
696
    server_config.read(os.path.join(options.configdir, "server.conf"))
 
697
    server_section = "server"
979
698
    # Convert the SafeConfigParser object to a dict
980
 
    server_settings = server_config.defaults()
981
 
    # Use the appropriate methods on the non-string config options
982
 
    server_settings["debug"] = server_config.getboolean("DEFAULT",
983
 
                                                        "debug")
984
 
    server_settings["use_dbus"] = server_config.getboolean("DEFAULT",
985
 
                                                           "use_dbus")
986
 
    server_settings["use_ipv6"] = server_config.getboolean("DEFAULT",
987
 
                                                           "use_ipv6")
988
 
    if server_settings["port"]:
989
 
        server_settings["port"] = server_config.getint("DEFAULT",
990
 
                                                       "port")
 
699
    server_settings = dict(server_config.items(server_section))
 
700
    # Use getboolean on the boolean config option
 
701
    server_settings["debug"] = server_config.getboolean\
 
702
                               (server_section, "debug")
991
703
    del server_config
992
704
    
993
705
    # Override the settings from the config file with command line
994
706
    # options, if set.
995
707
    for option in ("interface", "address", "port", "debug",
996
 
                   "priority", "servicename", "configdir",
997
 
                   "use_dbus", "use_ipv6"):
 
708
                   "priority", "servicename", "configdir"):
998
709
        value = getattr(options, option)
999
710
        if value is not None:
1000
711
            server_settings[option] = value
1001
712
    del options
1002
713
    # Now we have our good server settings in "server_settings"
1003
714
    
1004
 
    # For convenience
1005
 
    debug = server_settings["debug"]
1006
 
    use_dbus = server_settings["use_dbus"]
1007
 
    use_ipv6 = server_settings["use_ipv6"]
1008
 
    
1009
 
    if not debug:
1010
 
        syslogger.setLevel(logging.WARNING)
1011
 
        console.setLevel(logging.WARNING)
1012
 
    
1013
 
    if server_settings["servicename"] != "Mandos":
1014
 
        syslogger.setFormatter(logging.Formatter
1015
 
                               ('Mandos (%s): %%(levelname)s:'
1016
 
                                ' %%(message)s'
1017
 
                                % server_settings["servicename"]))
1018
 
    
1019
715
    # Parse config file with clients
1020
716
    client_defaults = { "timeout": "1h",
1021
717
                        "interval": "5m",
1022
 
                        "checker": "fping -q -- %%(host)s",
1023
 
                        "host": "",
 
718
                        "checker": "fping -q -- %%(fqdn)s",
1024
719
                        }
1025
720
    client_config = ConfigParser.SafeConfigParser(client_defaults)
1026
721
    client_config.read(os.path.join(server_settings["configdir"],
1027
722
                                    "clients.conf"))
1028
723
    
1029
 
    clients = Set()
1030
 
    tcp_server = IPv6_TCPServer((server_settings["address"],
1031
 
                                 server_settings["port"]),
1032
 
                                TCP_handler,
1033
 
                                settings=server_settings,
1034
 
                                clients=clients, use_ipv6=use_ipv6)
1035
 
    pidfilename = "/var/run/mandos.pid"
1036
 
    try:
1037
 
        pidfile = open(pidfilename, "w")
1038
 
    except IOError:
1039
 
        logger.error("Could not open file %r", pidfilename)
1040
 
    
1041
 
    try:
1042
 
        uid = pwd.getpwnam("_mandos").pw_uid
1043
 
        gid = pwd.getpwnam("_mandos").pw_gid
1044
 
    except KeyError:
1045
 
        try:
1046
 
            uid = pwd.getpwnam("mandos").pw_uid
1047
 
            gid = pwd.getpwnam("mandos").pw_gid
1048
 
        except KeyError:
1049
 
            try:
1050
 
                uid = pwd.getpwnam("nobody").pw_uid
1051
 
                gid = pwd.getpwnam("nogroup").pw_gid
1052
 
            except KeyError:
1053
 
                uid = 65534
1054
 
                gid = 65534
1055
 
    try:
1056
 
        os.setgid(gid)
1057
 
        os.setuid(uid)
1058
 
    except OSError, error:
1059
 
        if error[0] != errno.EPERM:
1060
 
            raise error
1061
 
    
1062
 
    # Enable all possible GnuTLS debugging
1063
 
    if debug:
1064
 
        # "Use a log level over 10 to enable all debugging options."
1065
 
        # - GnuTLS manual
1066
 
        gnutls.library.functions.gnutls_global_set_log_level(11)
1067
 
        
1068
 
        @gnutls.library.types.gnutls_log_func
1069
 
        def debug_gnutls(level, string):
1070
 
            logger.debug("GnuTLS: %s", string[:-1])
1071
 
        
1072
 
        (gnutls.library.functions
1073
 
         .gnutls_global_set_log_function(debug_gnutls))
1074
 
    
1075
724
    global service
1076
 
    protocol = avahi.PROTO_INET6 if use_ipv6 else avahi.PROTO_INET
1077
725
    service = AvahiService(name = server_settings["servicename"],
1078
 
                           servicetype = "_mandos._tcp",
1079
 
                           protocol = protocol)
 
726
                           type = "_mandos._tcp", );
1080
727
    if server_settings["interface"]:
1081
 
        service.interface = (if_nametoindex
1082
 
                             (server_settings["interface"]))
 
728
        service.interface = if_nametoindex(server_settings["interface"])
1083
729
    
1084
730
    global main_loop
1085
731
    global bus
1088
734
    DBusGMainLoop(set_as_default=True )
1089
735
    main_loop = gobject.MainLoop()
1090
736
    bus = dbus.SystemBus()
1091
 
    server = dbus.Interface(bus.get_object(avahi.DBUS_NAME,
1092
 
                                           avahi.DBUS_PATH_SERVER),
1093
 
                            avahi.DBUS_INTERFACE_SERVER)
 
737
    server = dbus.Interface(
 
738
            bus.get_object( avahi.DBUS_NAME, avahi.DBUS_PATH_SERVER ),
 
739
            avahi.DBUS_INTERFACE_SERVER )
1094
740
    # End of Avahi example code
1095
 
    if use_dbus:
1096
 
        bus_name = dbus.service.BusName(u"se.bsnet.fukt.Mandos", bus)
 
741
    
 
742
    debug = server_settings["debug"]
 
743
    
 
744
    if debug:
 
745
        console = logging.StreamHandler()
 
746
        # console.setLevel(logging.DEBUG)
 
747
        console.setFormatter(logging.Formatter\
 
748
                             ('%(levelname)s: %(message)s'))
 
749
        logger.addHandler(console)
 
750
        del console
 
751
    
 
752
    clients = Set()
 
753
    def remove_from_clients(client):
 
754
        clients.remove(client)
 
755
        if not clients:
 
756
            logger.critical(u"No clients left, exiting")
 
757
            sys.exit()
1097
758
    
1098
759
    clients.update(Set(Client(name = section,
 
760
                              stop_hook = remove_from_clients,
1099
761
                              config
1100
 
                              = dict(client_config.items(section)),
1101
 
                              use_dbus = use_dbus)
 
762
                              = dict(client_config.items(section)))
1102
763
                       for section in client_config.sections()))
1103
 
    if not clients:
1104
 
        logger.warning(u"No clients defined")
1105
 
    
1106
 
    if debug:
1107
 
        # Redirect stdin so all checkers get /dev/null
1108
 
        null = os.open(os.path.devnull, os.O_NOCTTY | os.O_RDWR)
1109
 
        os.dup2(null, sys.stdin.fileno())
1110
 
        if null > 2:
1111
 
            os.close(null)
1112
 
    else:
1113
 
        # No console logging
1114
 
        logger.removeHandler(console)
1115
 
        # Close all input and output, do double fork, etc.
1116
 
        daemon()
1117
 
    
1118
 
    try:
1119
 
        pid = os.getpid()
1120
 
        pidfile.write(str(pid) + "\n")
1121
 
        pidfile.close()
1122
 
        del pidfile
1123
 
    except IOError:
1124
 
        logger.error(u"Could not write to file %r with PID %d",
1125
 
                     pidfilename, pid)
1126
 
    except NameError:
1127
 
        # "pidfile" was never created
1128
 
        pass
1129
 
    del pidfilename
 
764
    
 
765
    if not debug:
 
766
        daemon(False, False)
1130
767
    
1131
768
    def cleanup():
1132
769
        "Cleanup function; run on exit"
1139
776
        
1140
777
        while clients:
1141
778
            client = clients.pop()
1142
 
            client.disable_hook = None
1143
 
            client.disable()
 
779
            client.stop_hook = None
 
780
            client.stop()
1144
781
    
1145
782
    atexit.register(cleanup)
1146
783
    
1149
786
    signal.signal(signal.SIGHUP, lambda signum, frame: sys.exit())
1150
787
    signal.signal(signal.SIGTERM, lambda signum, frame: sys.exit())
1151
788
    
1152
 
    if use_dbus:
1153
 
        class MandosServer(dbus.service.Object):
1154
 
            """A D-Bus proxy object"""
1155
 
            def __init__(self):
1156
 
                dbus.service.Object.__init__(self, bus, "/")
1157
 
            _interface = u"se.bsnet.fukt.Mandos"
1158
 
            
1159
 
            @dbus.service.signal(_interface, signature="oa{sv}")
1160
 
            def ClientAdded(self, objpath, properties):
1161
 
                "D-Bus signal"
1162
 
                pass
1163
 
            
1164
 
            @dbus.service.signal(_interface, signature="os")
1165
 
            def ClientRemoved(self, objpath, name):
1166
 
                "D-Bus signal"
1167
 
                pass
1168
 
            
1169
 
            @dbus.service.method(_interface, out_signature="ao")
1170
 
            def GetAllClients(self):
1171
 
                "D-Bus method"
1172
 
                return dbus.Array(c.dbus_object_path for c in clients)
1173
 
            
1174
 
            @dbus.service.method(_interface, out_signature="a{oa{sv}}")
1175
 
            def GetAllClientsWithProperties(self):
1176
 
                "D-Bus method"
1177
 
                return dbus.Dictionary(
1178
 
                    ((c.dbus_object_path, c.GetAllProperties())
1179
 
                     for c in clients),
1180
 
                    signature="oa{sv}")
1181
 
            
1182
 
            @dbus.service.method(_interface, in_signature="o")
1183
 
            def RemoveClient(self, object_path):
1184
 
                "D-Bus method"
1185
 
                for c in clients:
1186
 
                    if c.dbus_object_path == object_path:
1187
 
                        clients.remove(c)
1188
 
                        # Don't signal anything except ClientRemoved
1189
 
                        c.use_dbus = False
1190
 
                        c.disable()
1191
 
                        # Emit D-Bus signal
1192
 
                        self.ClientRemoved(object_path, c.name)
1193
 
                        return
1194
 
                raise KeyError
1195
 
            
1196
 
            del _interface
1197
 
        
1198
 
        mandos_server = MandosServer()
1199
 
    
1200
789
    for client in clients:
1201
 
        if use_dbus:
1202
 
            # Emit D-Bus signal
1203
 
            mandos_server.ClientAdded(client.dbus_object_path,
1204
 
                                      client.GetAllProperties())
1205
 
        client.enable()
1206
 
    
1207
 
    tcp_server.enable()
1208
 
    tcp_server.server_activate()
1209
 
    
 
790
        client.start()
 
791
    
 
792
    tcp_server = IPv6_TCPServer((server_settings["address"],
 
793
                                 server_settings["port"]),
 
794
                                tcp_handler,
 
795
                                settings=server_settings,
 
796
                                clients=clients)
1210
797
    # Find out what port we got
1211
798
    service.port = tcp_server.socket.getsockname()[1]
1212
 
    if use_ipv6:
1213
 
        logger.info(u"Now listening on address %r, port %d,"
1214
 
                    " flowinfo %d, scope_id %d"
1215
 
                    % tcp_server.socket.getsockname())
1216
 
    else:                       # IPv4
1217
 
        logger.info(u"Now listening on address %r, port %d"
1218
 
                    % tcp_server.socket.getsockname())
 
799
    logger.info(u"Now listening on address %r, port %d, flowinfo %d,"
 
800
                u" scope_id %d" % tcp_server.socket.getsockname())
1219
801
    
1220
802
    #service.interface = tcp_server.socket.getsockname()[3]
1221
803
    
1231
813
        
1232
814
        gobject.io_add_watch(tcp_server.fileno(), gobject.IO_IN,
1233
815
                             lambda *args, **kwargs:
1234
 
                             (tcp_server.handle_request
1235
 
                              (*args[2:], **kwargs) or True))
 
816
                             tcp_server.handle_request\
 
817
                             (*args[2:], **kwargs) or True)
1236
818
        
1237
 
        logger.debug(u"Starting main loop")
 
819
        logger.debug("Starting main loop")
 
820
        main_loop_started = True
1238
821
        main_loop.run()
1239
822
    except AvahiError, error:
1240
 
        logger.critical(u"AvahiError: %s", error)
 
823
        logger.critical(u"AvahiError: %s" + unicode(error))
1241
824
        sys.exit(1)
1242
825
    except KeyboardInterrupt:
1243
826
        if debug:
1244
 
            print >> sys.stderr
1245
 
        logger.debug("Server received KeyboardInterrupt")
1246
 
    logger.debug("Server exiting")
 
827
            print
1247
828
 
1248
829
if __name__ == '__main__':
1249
830
    main()