/mandos/release

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  • Committer: Teddy Hogeborn
  • Date: 2008-09-30 07:23:39 UTC
  • Revision ID: teddy@fukt.bsnet.se-20080930072339-jn15gyrtfpdk2dhx
* .bzrignore: Added "man" directory (created by "make install-html").

* Makefile: Add "common.ent" dependency to all manual pages.
  (htmldir, version, SED): New variables.
  (CFLAGS): Add -D option to define VERSION to $(version).
  (MANPOST, HTMLPOST): Use $(SED).
  (PROGS): Use $(CPROGS)
  (CPROGS): New; C-only programs.
  (objects): Use $(CPROGS).
  (common.ent, mandos, mandos-keygen): New targets; update version
                                       number to $(version).
  (clean): Use $(CPROGS).
  (check): Depend on "all".
  (install-html): Install to $(htmldir).

* common.ent: New file with "version" entity.

* mandos-clients.conf.xml: Use "common.ent".
* mandos-keygen.xml: - '' -
* mandos.conf.xml: - '' -
* mandos.xml: - '' -
* plugin-runner.xml: - '' -
* plugins.d/mandos-client.xml: - '' -
* plugins.d/password-prompt.xml: - '' -

* plugin-runner.c (argp_program_version): Use VERSION.
* plugins.d/mandos-client.c (argp_program_version): - '' -
* plugins.d/password-prompt.c (argp_program_version): - '' -

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Lines of Context:
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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", "remove", "server_state_changed",
10
 
# "entry_group_state_changed", "cleanup", and "activate" in the
11
 
# "AvahiService" class, and some lines in "main".
 
9
# methods "add" and "remove" in the "AvahiService" class, the
 
10
# "server_state_changed" and "entry_group_state_changed" functions,
 
11
# and some lines in "main".
12
12
13
13
# Everything else is
14
 
# Copyright © 2008,2009 Teddy Hogeborn
15
 
# Copyright © 2008,2009 Björn Påhlsson
 
14
# Copyright © 2008 Teddy Hogeborn & Björn Påhlsson
16
15
17
16
# This program is free software: you can redistribute it and/or modify
18
17
# it under the terms of the GNU General Public License as published by
31
30
# Contact the authors at <mandos@fukt.bsnet.se>.
32
31
33
32
 
34
 
from __future__ import division, with_statement, absolute_import
 
33
from __future__ import division
35
34
 
36
 
import SocketServer as socketserver
 
35
import SocketServer
37
36
import socket
38
 
import optparse
 
37
from optparse import OptionParser
39
38
import datetime
40
39
import errno
41
40
import gnutls.crypto
44
43
import gnutls.library.functions
45
44
import gnutls.library.constants
46
45
import gnutls.library.types
47
 
import ConfigParser as configparser
 
46
import ConfigParser
48
47
import sys
49
48
import re
50
49
import os
51
50
import signal
 
51
from sets import Set
52
52
import subprocess
53
53
import atexit
54
54
import stat
55
55
import logging
56
56
import logging.handlers
57
57
import pwd
58
 
from contextlib import closing
59
 
import struct
60
 
import fcntl
61
 
import functools
62
58
 
63
59
import dbus
64
 
import dbus.service
65
60
import gobject
66
61
import avahi
67
62
from dbus.mainloop.glib import DBusGMainLoop
68
63
import ctypes
69
64
import ctypes.util
70
65
 
71
 
try:
72
 
    SO_BINDTODEVICE = socket.SO_BINDTODEVICE
73
 
except AttributeError:
74
 
    try:
75
 
        from IN import SO_BINDTODEVICE
76
 
    except ImportError:
77
 
        # From /usr/include/asm/socket.h
78
 
        SO_BINDTODEVICE = 25
79
 
 
80
 
 
81
 
version = "1.0.8"
82
 
 
83
 
logger = logging.Logger(u'mandos')
84
 
syslogger = (logging.handlers.SysLogHandler
85
 
             (facility = logging.handlers.SysLogHandler.LOG_DAEMON,
86
 
              address = "/dev/log"))
87
 
syslogger.setFormatter(logging.Formatter
88
 
                       (u'Mandos [%(process)d]: %(levelname)s:'
89
 
                        u' %(message)s'))
 
66
version = "1.0"
 
67
 
 
68
logger = logging.Logger('mandos')
 
69
syslogger = logging.handlers.SysLogHandler\
 
70
            (facility = logging.handlers.SysLogHandler.LOG_DAEMON,
 
71
             address = "/dev/log")
 
72
syslogger.setFormatter(logging.Formatter\
 
73
                        ('Mandos: %(levelname)s: %(message)s'))
90
74
logger.addHandler(syslogger)
91
75
 
92
76
console = logging.StreamHandler()
93
 
console.setFormatter(logging.Formatter(u'%(name)s [%(process)d]:'
94
 
                                       u' %(levelname)s:'
95
 
                                       u' %(message)s'))
 
77
console.setFormatter(logging.Formatter('%(name)s: %(levelname)s:'
 
78
                                       ' %(message)s'))
96
79
logger.addHandler(console)
97
80
 
98
81
class AvahiError(Exception):
99
 
    def __init__(self, value, *args, **kwargs):
 
82
    def __init__(self, value):
100
83
        self.value = value
101
 
        super(AvahiError, self).__init__(value, *args, **kwargs)
102
 
    def __unicode__(self):
103
 
        return unicode(repr(self.value))
 
84
        super(AvahiError, self).__init__()
 
85
    def __str__(self):
 
86
        return repr(self.value)
104
87
 
105
88
class AvahiServiceError(AvahiError):
106
89
    pass
111
94
 
112
95
class AvahiService(object):
113
96
    """An Avahi (Zeroconf) service.
114
 
    
115
97
    Attributes:
116
98
    interface: integer; avahi.IF_UNSPEC or an interface index.
117
99
               Used to optionally bind to the specified interface.
118
 
    name: string; Example: u'Mandos'
119
 
    type: string; Example: u'_mandos._tcp'.
 
100
    name: string; Example: 'Mandos'
 
101
    type: string; Example: '_mandos._tcp'.
120
102
                  See <http://www.dns-sd.org/ServiceTypes.html>
121
103
    port: integer; what port to announce
122
104
    TXT: list of strings; TXT record for the service
125
107
    max_renames: integer; maximum number of renames
126
108
    rename_count: integer; counter so we only rename after collisions
127
109
                  a sensible number of times
128
 
    group: D-Bus Entry Group
129
 
    server: D-Bus Server
130
110
    """
131
111
    def __init__(self, interface = avahi.IF_UNSPEC, name = None,
132
 
                 servicetype = None, port = None, TXT = None,
133
 
                 domain = u"", host = u"", max_renames = 32768,
134
 
                 protocol = avahi.PROTO_UNSPEC, bus = None):
 
112
                 servicetype = None, port = None, TXT = None, domain = "",
 
113
                 host = "", max_renames = 32768):
135
114
        self.interface = interface
136
115
        self.name = name
137
116
        self.type = servicetype
138
117
        self.port = port
139
 
        self.TXT = TXT if TXT is not None else []
 
118
        if TXT is None:
 
119
            self.TXT = []
 
120
        else:
 
121
            self.TXT = TXT
140
122
        self.domain = domain
141
123
        self.host = host
142
124
        self.rename_count = 0
143
125
        self.max_renames = max_renames
144
 
        self.protocol = protocol
145
 
        self.group = None       # our entry group
146
 
        self.server = None
147
 
        self.bus = bus
148
126
    def rename(self):
149
127
        """Derived from the Avahi example code"""
150
128
        if self.rename_count >= self.max_renames:
151
129
            logger.critical(u"No suitable Zeroconf service name found"
152
130
                            u" after %i retries, exiting.",
153
131
                            self.rename_count)
154
 
            raise AvahiServiceError(u"Too many renames")
155
 
        self.name = self.server.GetAlternativeServiceName(self.name)
 
132
            raise AvahiServiceError("Too many renames")
 
133
        self.name = server.GetAlternativeServiceName(self.name)
156
134
        logger.info(u"Changing Zeroconf service name to %r ...",
157
 
                    unicode(self.name))
158
 
        syslogger.setFormatter(logging.Formatter
159
 
                               (u'Mandos (%s) [%%(process)d]:'
160
 
                                u' %%(levelname)s: %%(message)s'
161
 
                                % self.name))
 
135
                    str(self.name))
 
136
        syslogger.setFormatter(logging.Formatter\
 
137
                               ('Mandos (%s): %%(levelname)s:'
 
138
                               ' %%(message)s' % self.name))
162
139
        self.remove()
163
140
        self.add()
164
141
        self.rename_count += 1
165
142
    def remove(self):
166
143
        """Derived from the Avahi example code"""
167
 
        if self.group is not None:
168
 
            self.group.Reset()
 
144
        if group is not None:
 
145
            group.Reset()
169
146
    def add(self):
170
147
        """Derived from the Avahi example code"""
171
 
        if self.group is None:
172
 
            self.group = dbus.Interface(
173
 
                self.bus.get_object(avahi.DBUS_NAME,
174
 
                                    self.server.EntryGroupNew()),
175
 
                avahi.DBUS_INTERFACE_ENTRY_GROUP)
176
 
            self.group.connect_to_signal('StateChanged',
177
 
                                         self.entry_group_state_changed)
 
148
        global group
 
149
        if group is None:
 
150
            group = dbus.Interface\
 
151
                    (bus.get_object(avahi.DBUS_NAME,
 
152
                                    server.EntryGroupNew()),
 
153
                     avahi.DBUS_INTERFACE_ENTRY_GROUP)
 
154
            group.connect_to_signal('StateChanged',
 
155
                                    entry_group_state_changed)
178
156
        logger.debug(u"Adding Zeroconf service '%s' of type '%s' ...",
179
 
                     self.name, self.type)
180
 
        self.group.AddService(
181
 
            self.interface,
182
 
            self.protocol,
183
 
            dbus.UInt32(0),     # flags
184
 
            self.name, self.type,
185
 
            self.domain, self.host,
186
 
            dbus.UInt16(self.port),
187
 
            avahi.string_array_to_txt_array(self.TXT))
188
 
        self.group.Commit()
189
 
    def entry_group_state_changed(self, state, error):
190
 
        """Derived from the Avahi example code"""
191
 
        logger.debug(u"Avahi state change: %i", state)
192
 
        
193
 
        if state == avahi.ENTRY_GROUP_ESTABLISHED:
194
 
            logger.debug(u"Zeroconf service established.")
195
 
        elif state == avahi.ENTRY_GROUP_COLLISION:
196
 
            logger.warning(u"Zeroconf service name collision.")
197
 
            self.rename()
198
 
        elif state == avahi.ENTRY_GROUP_FAILURE:
199
 
            logger.critical(u"Avahi: Error in group state changed %s",
200
 
                            unicode(error))
201
 
            raise AvahiGroupError(u"State changed: %s"
202
 
                                  % unicode(error))
203
 
    def cleanup(self):
204
 
        """Derived from the Avahi example code"""
205
 
        if self.group is not None:
206
 
            self.group.Free()
207
 
            self.group = None
208
 
    def server_state_changed(self, state):
209
 
        """Derived from the Avahi example code"""
210
 
        if state == avahi.SERVER_COLLISION:
211
 
            logger.error(u"Zeroconf server name collision")
212
 
            self.remove()
213
 
        elif state == avahi.SERVER_RUNNING:
214
 
            self.add()
215
 
    def activate(self):
216
 
        """Derived from the Avahi example code"""
217
 
        if self.server is None:
218
 
            self.server = dbus.Interface(
219
 
                self.bus.get_object(avahi.DBUS_NAME,
220
 
                                    avahi.DBUS_PATH_SERVER),
221
 
                avahi.DBUS_INTERFACE_SERVER)
222
 
        self.server.connect_to_signal(u"StateChanged",
223
 
                                 self.server_state_changed)
224
 
        self.server_state_changed(self.server.GetState())
 
157
                     service.name, service.type)
 
158
        group.AddService(
 
159
                self.interface,         # interface
 
160
                avahi.PROTO_INET6,      # protocol
 
161
                dbus.UInt32(0),         # flags
 
162
                self.name, self.type,
 
163
                self.domain, self.host,
 
164
                dbus.UInt16(self.port),
 
165
                avahi.string_array_to_txt_array(self.TXT))
 
166
        group.Commit()
 
167
 
 
168
# From the Avahi example code:
 
169
group = None                            # our entry group
 
170
# End of Avahi example code
225
171
 
226
172
 
227
173
class Client(object):
228
174
    """A representation of a client host served by this server.
229
 
    
230
175
    Attributes:
231
 
    name:       string; from the config file, used in log messages and
232
 
                        D-Bus identifiers
 
176
    name:      string; from the config file, used in log messages
233
177
    fingerprint: string (40 or 32 hexadecimal digits); used to
234
178
                 uniquely identify the client
235
 
    secret:     bytestring; sent verbatim (over TLS) to client
236
 
    host:       string; available for use by the checker command
237
 
    created:    datetime.datetime(); (UTC) object creation
238
 
    last_enabled: datetime.datetime(); (UTC)
239
 
    enabled:    bool()
240
 
    last_checked_ok: datetime.datetime(); (UTC) or None
241
 
    timeout:    datetime.timedelta(); How long from last_checked_ok
242
 
                                      until this client is invalid
243
 
    interval:   datetime.timedelta(); How often to start a new checker
244
 
    disable_hook:  If set, called by disable() as disable_hook(self)
245
 
    checker:    subprocess.Popen(); a running checker process used
246
 
                                    to see if the client lives.
247
 
                                    'None' if no process is running.
 
179
    secret:    bytestring; sent verbatim (over TLS) to client
 
180
    host:      string; available for use by the checker command
 
181
    created:   datetime.datetime(); object creation, not client host
 
182
    last_checked_ok: datetime.datetime() or None if not yet checked OK
 
183
    timeout:   datetime.timedelta(); How long from last_checked_ok
 
184
                                     until this client is invalid
 
185
    interval:  datetime.timedelta(); How often to start a new checker
 
186
    stop_hook: If set, called by stop() as stop_hook(self)
 
187
    checker:   subprocess.Popen(); a running checker process used
 
188
                                   to see if the client lives.
 
189
                                   'None' if no process is running.
248
190
    checker_initiator_tag: a gobject event source tag, or None
249
 
    disable_initiator_tag:    - '' -
 
191
    stop_initiator_tag:    - '' -
250
192
    checker_callback_tag:  - '' -
251
193
    checker_command: string; External command which is run to check if
252
194
                     client lives.  %() expansions are done at
253
195
                     runtime with vars(self) as dict, so that for
254
196
                     instance %(name)s can be used in the command.
255
 
    current_checker_command: string; current running checker_command
 
197
    Private attibutes:
 
198
    _timeout: Real variable for 'timeout'
 
199
    _interval: Real variable for 'interval'
 
200
    _timeout_milliseconds: Used when calling gobject.timeout_add()
 
201
    _interval_milliseconds: - '' -
256
202
    """
257
 
    
258
 
    @staticmethod
259
 
    def _datetime_to_milliseconds(dt):
260
 
        "Convert a datetime.datetime() to milliseconds"
261
 
        return ((dt.days * 24 * 60 * 60 * 1000)
262
 
                + (dt.seconds * 1000)
263
 
                + (dt.microseconds // 1000))
264
 
    
265
 
    def timeout_milliseconds(self):
266
 
        "Return the 'timeout' attribute in milliseconds"
267
 
        return self._datetime_to_milliseconds(self.timeout)
268
 
    
269
 
    def interval_milliseconds(self):
270
 
        "Return the 'interval' attribute in milliseconds"
271
 
        return self._datetime_to_milliseconds(self.interval)
272
 
    
273
 
    def __init__(self, name = None, disable_hook=None, config=None):
 
203
    def _set_timeout(self, timeout):
 
204
        "Setter function for 'timeout' attribute"
 
205
        self._timeout = timeout
 
206
        self._timeout_milliseconds = ((self.timeout.days
 
207
                                       * 24 * 60 * 60 * 1000)
 
208
                                      + (self.timeout.seconds * 1000)
 
209
                                      + (self.timeout.microseconds
 
210
                                         // 1000))
 
211
    timeout = property(lambda self: self._timeout,
 
212
                       _set_timeout)
 
213
    del _set_timeout
 
214
    def _set_interval(self, interval):
 
215
        "Setter function for 'interval' attribute"
 
216
        self._interval = interval
 
217
        self._interval_milliseconds = ((self.interval.days
 
218
                                        * 24 * 60 * 60 * 1000)
 
219
                                       + (self.interval.seconds
 
220
                                          * 1000)
 
221
                                       + (self.interval.microseconds
 
222
                                          // 1000))
 
223
    interval = property(lambda self: self._interval,
 
224
                        _set_interval)
 
225
    del _set_interval
 
226
    def __init__(self, name = None, stop_hook=None, config=None):
274
227
        """Note: the 'checker' key in 'config' sets the
275
228
        'checker_command' attribute and *not* the 'checker'
276
229
        attribute."""
277
 
        self.name = name
278
230
        if config is None:
279
231
            config = {}
 
232
        self.name = name
280
233
        logger.debug(u"Creating client %r", self.name)
281
234
        # Uppercase and remove spaces from fingerprint for later
282
235
        # comparison purposes with return value from the fingerprint()
283
236
        # function
284
 
        self.fingerprint = (config[u"fingerprint"].upper()
285
 
                            .replace(u" ", u""))
 
237
        self.fingerprint = config["fingerprint"].upper()\
 
238
                           .replace(u" ", u"")
286
239
        logger.debug(u"  Fingerprint: %s", self.fingerprint)
287
 
        if u"secret" in config:
288
 
            self.secret = config[u"secret"].decode(u"base64")
289
 
        elif u"secfile" in config:
290
 
            with closing(open(os.path.expanduser
291
 
                              (os.path.expandvars
292
 
                               (config[u"secfile"])))) as secfile:
293
 
                self.secret = secfile.read()
 
240
        if "secret" in config:
 
241
            self.secret = config["secret"].decode(u"base64")
 
242
        elif "secfile" in config:
 
243
            secfile = open(config["secfile"])
 
244
            self.secret = secfile.read()
 
245
            secfile.close()
294
246
        else:
295
247
            raise TypeError(u"No secret or secfile for client %s"
296
248
                            % self.name)
297
 
        self.host = config.get(u"host", u"")
298
 
        self.created = datetime.datetime.utcnow()
299
 
        self.enabled = False
300
 
        self.last_enabled = None
 
249
        self.host = config.get("host", "")
 
250
        self.created = datetime.datetime.now()
301
251
        self.last_checked_ok = None
302
 
        self.timeout = string_to_delta(config[u"timeout"])
303
 
        self.interval = string_to_delta(config[u"interval"])
304
 
        self.disable_hook = disable_hook
 
252
        self.timeout = string_to_delta(config["timeout"])
 
253
        self.interval = string_to_delta(config["interval"])
 
254
        self.stop_hook = stop_hook
305
255
        self.checker = None
306
256
        self.checker_initiator_tag = None
307
 
        self.disable_initiator_tag = None
 
257
        self.stop_initiator_tag = None
308
258
        self.checker_callback_tag = None
309
 
        self.checker_command = config[u"checker"]
310
 
        self.current_checker_command = None
311
 
        self.last_connect = None
312
 
    
313
 
    def enable(self):
 
259
        self.check_command = config["checker"]
 
260
    def start(self):
314
261
        """Start this client's checker and timeout hooks"""
315
 
        self.last_enabled = datetime.datetime.utcnow()
316
262
        # Schedule a new checker to be started an 'interval' from now,
317
263
        # and every interval from then on.
318
 
        self.checker_initiator_tag = (gobject.timeout_add
319
 
                                      (self.interval_milliseconds(),
320
 
                                       self.start_checker))
 
264
        self.checker_initiator_tag = gobject.timeout_add\
 
265
                                     (self._interval_milliseconds,
 
266
                                      self.start_checker)
321
267
        # Also start a new checker *right now*.
322
268
        self.start_checker()
323
 
        # Schedule a disable() when 'timeout' has passed
324
 
        self.disable_initiator_tag = (gobject.timeout_add
325
 
                                   (self.timeout_milliseconds(),
326
 
                                    self.disable))
327
 
        self.enabled = True
328
 
    
329
 
    def disable(self):
330
 
        """Disable this client."""
331
 
        if not getattr(self, "enabled", False):
 
269
        # Schedule a stop() when 'timeout' has passed
 
270
        self.stop_initiator_tag = gobject.timeout_add\
 
271
                                  (self._timeout_milliseconds,
 
272
                                   self.stop)
 
273
    def stop(self):
 
274
        """Stop this client.
 
275
        The possibility that a client might be restarted is left open,
 
276
        but not currently used."""
 
277
        # If this client doesn't have a secret, it is already stopped.
 
278
        if hasattr(self, "secret") and self.secret:
 
279
            logger.info(u"Stopping client %s", self.name)
 
280
            self.secret = None
 
281
        else:
332
282
            return False
333
 
        logger.info(u"Disabling client %s", self.name)
334
 
        if getattr(self, u"disable_initiator_tag", False):
335
 
            gobject.source_remove(self.disable_initiator_tag)
336
 
            self.disable_initiator_tag = None
337
 
        if getattr(self, u"checker_initiator_tag", False):
 
283
        if getattr(self, "stop_initiator_tag", False):
 
284
            gobject.source_remove(self.stop_initiator_tag)
 
285
            self.stop_initiator_tag = None
 
286
        if getattr(self, "checker_initiator_tag", False):
338
287
            gobject.source_remove(self.checker_initiator_tag)
339
288
            self.checker_initiator_tag = None
340
289
        self.stop_checker()
341
 
        if self.disable_hook:
342
 
            self.disable_hook(self)
343
 
        self.enabled = False
 
290
        if self.stop_hook:
 
291
            self.stop_hook(self)
344
292
        # Do not run this again if called by a gobject.timeout_add
345
293
        return False
346
 
    
347
294
    def __del__(self):
348
 
        self.disable_hook = None
349
 
        self.disable()
350
 
    
351
 
    def checker_callback(self, pid, condition, command):
 
295
        self.stop_hook = None
 
296
        self.stop()
 
297
    def checker_callback(self, pid, condition):
352
298
        """The checker has completed, so take appropriate actions."""
 
299
        now = datetime.datetime.now()
353
300
        self.checker_callback_tag = None
354
301
        self.checker = None
355
 
        if os.WIFEXITED(condition):
356
 
            exitstatus = os.WEXITSTATUS(condition)
357
 
            if exitstatus == 0:
358
 
                logger.info(u"Checker for %(name)s succeeded",
359
 
                            vars(self))
360
 
                self.checked_ok()
361
 
            else:
362
 
                logger.info(u"Checker for %(name)s failed",
363
 
                            vars(self))
364
 
        else:
 
302
        if os.WIFEXITED(condition) \
 
303
               and (os.WEXITSTATUS(condition) == 0):
 
304
            logger.info(u"Checker for %(name)s succeeded",
 
305
                        vars(self))
 
306
            self.last_checked_ok = now
 
307
            gobject.source_remove(self.stop_initiator_tag)
 
308
            self.stop_initiator_tag = gobject.timeout_add\
 
309
                                      (self._timeout_milliseconds,
 
310
                                       self.stop)
 
311
        elif not os.WIFEXITED(condition):
365
312
            logger.warning(u"Checker for %(name)s crashed?",
366
313
                           vars(self))
367
 
    
368
 
    def checked_ok(self):
369
 
        """Bump up the timeout for this client.
370
 
        
371
 
        This should only be called when the client has been seen,
372
 
        alive and well.
373
 
        """
374
 
        self.last_checked_ok = datetime.datetime.utcnow()
375
 
        gobject.source_remove(self.disable_initiator_tag)
376
 
        self.disable_initiator_tag = (gobject.timeout_add
377
 
                                      (self.timeout_milliseconds(),
378
 
                                       self.disable))
379
 
    
 
314
        else:
 
315
            logger.info(u"Checker for %(name)s failed",
 
316
                        vars(self))
380
317
    def start_checker(self):
381
318
        """Start a new checker subprocess if one is not running.
382
 
        
383
319
        If a checker already exists, leave it running and do
384
320
        nothing."""
385
321
        # The reason for not killing a running checker is that if we
390
326
        # checkers alone, the checker would have to take more time
391
327
        # than 'timeout' for the client to be declared invalid, which
392
328
        # is as it should be.
393
 
        
394
 
        # If a checker exists, make sure it is not a zombie
395
 
        if self.checker is not None:
396
 
            pid, status = os.waitpid(self.checker.pid, os.WNOHANG)
397
 
            if pid:
398
 
                logger.warning(u"Checker was a zombie")
399
 
                gobject.source_remove(self.checker_callback_tag)
400
 
                self.checker_callback(pid, status,
401
 
                                      self.current_checker_command)
402
 
        # Start a new checker if needed
403
329
        if self.checker is None:
404
330
            try:
405
 
                # In case checker_command has exactly one % operator
406
 
                command = self.checker_command % self.host
 
331
                # In case check_command has exactly one % operator
 
332
                command = self.check_command % self.host
407
333
            except TypeError:
408
334
                # Escape attributes for the shell
409
 
                escaped_attrs = dict((key,
410
 
                                      re.escape(unicode(str(val),
411
 
                                                        errors=
412
 
                                                        u'replace')))
 
335
                escaped_attrs = dict((key, re.escape(str(val)))
413
336
                                     for key, val in
414
337
                                     vars(self).iteritems())
415
338
                try:
416
 
                    command = self.checker_command % escaped_attrs
 
339
                    command = self.check_command % escaped_attrs
417
340
                except TypeError, error:
418
341
                    logger.error(u'Could not format string "%s":'
419
 
                                 u' %s', self.checker_command, error)
 
342
                                 u' %s', self.check_command, error)
420
343
                    return True # Try again later
421
 
            self.current_checker_command = command
422
344
            try:
423
345
                logger.info(u"Starting checker %r for %s",
424
346
                            command, self.name)
428
350
                # always replaced by /dev/null.)
429
351
                self.checker = subprocess.Popen(command,
430
352
                                                close_fds=True,
431
 
                                                shell=True, cwd=u"/")
432
 
                self.checker_callback_tag = (gobject.child_watch_add
433
 
                                             (self.checker.pid,
434
 
                                              self.checker_callback,
435
 
                                              data=command))
436
 
                # The checker may have completed before the gobject
437
 
                # watch was added.  Check for this.
438
 
                pid, status = os.waitpid(self.checker.pid, os.WNOHANG)
439
 
                if pid:
440
 
                    gobject.source_remove(self.checker_callback_tag)
441
 
                    self.checker_callback(pid, status, command)
 
353
                                                shell=True, cwd="/")
 
354
                self.checker_callback_tag = gobject.child_watch_add\
 
355
                                            (self.checker.pid,
 
356
                                             self.checker_callback)
442
357
            except OSError, error:
443
358
                logger.error(u"Failed to start subprocess: %s",
444
359
                             error)
445
360
        # Re-run this periodically if run by gobject.timeout_add
446
361
        return True
447
 
    
448
362
    def stop_checker(self):
449
363
        """Force the checker process, if any, to stop."""
450
364
        if self.checker_callback_tag:
451
365
            gobject.source_remove(self.checker_callback_tag)
452
366
            self.checker_callback_tag = None
453
 
        if getattr(self, u"checker", None) is None:
 
367
        if getattr(self, "checker", None) is None:
454
368
            return
455
369
        logger.debug(u"Stopping checker for %(name)s", vars(self))
456
370
        try:
462
376
            if error.errno != errno.ESRCH: # No such process
463
377
                raise
464
378
        self.checker = None
465
 
    
466
379
    def still_valid(self):
467
380
        """Has the timeout not yet passed for this client?"""
468
 
        if not getattr(self, u"enabled", False):
469
 
            return False
470
 
        now = datetime.datetime.utcnow()
 
381
        now = datetime.datetime.now()
471
382
        if self.last_checked_ok is None:
472
383
            return now < (self.created + self.timeout)
473
384
        else:
474
385
            return now < (self.last_checked_ok + self.timeout)
475
386
 
476
387
 
477
 
class ClientDBus(Client, dbus.service.Object):
478
 
    """A Client class using D-Bus
479
 
    
480
 
    Attributes:
481
 
    dbus_object_path: dbus.ObjectPath ; only set if self.use_dbus
482
 
    """
483
 
    # dbus.service.Object doesn't use super(), so we can't either.
484
 
    
485
 
    def __init__(self, bus = None, *args, **kwargs):
486
 
        self.bus = bus
487
 
        Client.__init__(self, *args, **kwargs)
488
 
        # Only now, when this client is initialized, can it show up on
489
 
        # the D-Bus
490
 
        self.dbus_object_path = (dbus.ObjectPath
491
 
                                 (u"/clients/"
492
 
                                  + self.name.replace(u".", u"_")))
493
 
        dbus.service.Object.__init__(self, self.bus,
494
 
                                     self.dbus_object_path)
495
 
    
496
 
    @staticmethod
497
 
    def _datetime_to_dbus(dt, variant_level=0):
498
 
        """Convert a UTC datetime.datetime() to a D-Bus type."""
499
 
        return dbus.String(dt.isoformat(),
500
 
                           variant_level=variant_level)
501
 
    
502
 
    def enable(self):
503
 
        oldstate = getattr(self, u"enabled", False)
504
 
        r = Client.enable(self)
505
 
        if oldstate != self.enabled:
506
 
            # Emit D-Bus signals
507
 
            self.PropertyChanged(dbus.String(u"enabled"),
508
 
                                 dbus.Boolean(True, variant_level=1))
509
 
            self.PropertyChanged(
510
 
                dbus.String(u"last_enabled"),
511
 
                self._datetime_to_dbus(self.last_enabled,
512
 
                                       variant_level=1))
513
 
        return r
514
 
    
515
 
    def disable(self, signal = True):
516
 
        oldstate = getattr(self, u"enabled", False)
517
 
        r = Client.disable(self)
518
 
        if signal and oldstate != self.enabled:
519
 
            # Emit D-Bus signal
520
 
            self.PropertyChanged(dbus.String(u"enabled"),
521
 
                                 dbus.Boolean(False, variant_level=1))
522
 
        return r
523
 
    
524
 
    def __del__(self, *args, **kwargs):
525
 
        try:
526
 
            self.remove_from_connection()
527
 
        except LookupError:
528
 
            pass
529
 
        if hasattr(dbus.service.Object, u"__del__"):
530
 
            dbus.service.Object.__del__(self, *args, **kwargs)
531
 
        Client.__del__(self, *args, **kwargs)
532
 
    
533
 
    def checker_callback(self, pid, condition, command,
534
 
                         *args, **kwargs):
535
 
        self.checker_callback_tag = None
536
 
        self.checker = None
537
 
        # Emit D-Bus signal
538
 
        self.PropertyChanged(dbus.String(u"checker_running"),
539
 
                             dbus.Boolean(False, variant_level=1))
540
 
        if os.WIFEXITED(condition):
541
 
            exitstatus = os.WEXITSTATUS(condition)
542
 
            # Emit D-Bus signal
543
 
            self.CheckerCompleted(dbus.Int16(exitstatus),
544
 
                                  dbus.Int64(condition),
545
 
                                  dbus.String(command))
546
 
        else:
547
 
            # Emit D-Bus signal
548
 
            self.CheckerCompleted(dbus.Int16(-1),
549
 
                                  dbus.Int64(condition),
550
 
                                  dbus.String(command))
551
 
        
552
 
        return Client.checker_callback(self, pid, condition, command,
553
 
                                       *args, **kwargs)
554
 
    
555
 
    def checked_ok(self, *args, **kwargs):
556
 
        r = Client.checked_ok(self, *args, **kwargs)
557
 
        # Emit D-Bus signal
558
 
        self.PropertyChanged(
559
 
            dbus.String(u"last_checked_ok"),
560
 
            (self._datetime_to_dbus(self.last_checked_ok,
561
 
                                    variant_level=1)))
562
 
        return r
563
 
    
564
 
    def start_checker(self, *args, **kwargs):
565
 
        old_checker = self.checker
566
 
        if self.checker is not None:
567
 
            old_checker_pid = self.checker.pid
568
 
        else:
569
 
            old_checker_pid = None
570
 
        r = Client.start_checker(self, *args, **kwargs)
571
 
        # Only if new checker process was started
572
 
        if (self.checker is not None
573
 
            and old_checker_pid != self.checker.pid):
574
 
            # Emit D-Bus signal
575
 
            self.CheckerStarted(self.current_checker_command)
576
 
            self.PropertyChanged(
577
 
                dbus.String(u"checker_running"),
578
 
                dbus.Boolean(True, variant_level=1))
579
 
        return r
580
 
    
581
 
    def stop_checker(self, *args, **kwargs):
582
 
        old_checker = getattr(self, u"checker", None)
583
 
        r = Client.stop_checker(self, *args, **kwargs)
584
 
        if (old_checker is not None
585
 
            and getattr(self, u"checker", None) is None):
586
 
            self.PropertyChanged(dbus.String(u"checker_running"),
587
 
                                 dbus.Boolean(False, variant_level=1))
588
 
        return r
589
 
    
590
 
    ## D-Bus methods & signals
591
 
    _interface = u"se.bsnet.fukt.Mandos.Client"
592
 
    
593
 
    # CheckedOK - method
594
 
    @dbus.service.method(_interface)
595
 
    def CheckedOK(self):
596
 
        return self.checked_ok()
597
 
    
598
 
    # CheckerCompleted - signal
599
 
    @dbus.service.signal(_interface, signature=u"nxs")
600
 
    def CheckerCompleted(self, exitcode, waitstatus, command):
601
 
        "D-Bus signal"
602
 
        pass
603
 
    
604
 
    # CheckerStarted - signal
605
 
    @dbus.service.signal(_interface, signature=u"s")
606
 
    def CheckerStarted(self, command):
607
 
        "D-Bus signal"
608
 
        pass
609
 
    
610
 
    # GetAllProperties - method
611
 
    @dbus.service.method(_interface, out_signature=u"a{sv}")
612
 
    def GetAllProperties(self):
613
 
        "D-Bus method"
614
 
        return dbus.Dictionary({
615
 
                dbus.String(u"name"):
616
 
                    dbus.String(self.name, variant_level=1),
617
 
                dbus.String(u"fingerprint"):
618
 
                    dbus.String(self.fingerprint, variant_level=1),
619
 
                dbus.String(u"host"):
620
 
                    dbus.String(self.host, variant_level=1),
621
 
                dbus.String(u"created"):
622
 
                    self._datetime_to_dbus(self.created,
623
 
                                           variant_level=1),
624
 
                dbus.String(u"last_enabled"):
625
 
                    (self._datetime_to_dbus(self.last_enabled,
626
 
                                            variant_level=1)
627
 
                     if self.last_enabled is not None
628
 
                     else dbus.Boolean(False, variant_level=1)),
629
 
                dbus.String(u"enabled"):
630
 
                    dbus.Boolean(self.enabled, variant_level=1),
631
 
                dbus.String(u"last_checked_ok"):
632
 
                    (self._datetime_to_dbus(self.last_checked_ok,
633
 
                                            variant_level=1)
634
 
                     if self.last_checked_ok is not None
635
 
                     else dbus.Boolean (False, variant_level=1)),
636
 
                dbus.String(u"timeout"):
637
 
                    dbus.UInt64(self.timeout_milliseconds(),
638
 
                                variant_level=1),
639
 
                dbus.String(u"interval"):
640
 
                    dbus.UInt64(self.interval_milliseconds(),
641
 
                                variant_level=1),
642
 
                dbus.String(u"checker"):
643
 
                    dbus.String(self.checker_command,
644
 
                                variant_level=1),
645
 
                dbus.String(u"checker_running"):
646
 
                    dbus.Boolean(self.checker is not None,
647
 
                                 variant_level=1),
648
 
                dbus.String(u"object_path"):
649
 
                    dbus.ObjectPath(self.dbus_object_path,
650
 
                                    variant_level=1)
651
 
                }, signature=u"sv")
652
 
    
653
 
    # IsStillValid - method
654
 
    @dbus.service.method(_interface, out_signature=u"b")
655
 
    def IsStillValid(self):
656
 
        return self.still_valid()
657
 
    
658
 
    # PropertyChanged - signal
659
 
    @dbus.service.signal(_interface, signature=u"sv")
660
 
    def PropertyChanged(self, property, value):
661
 
        "D-Bus signal"
662
 
        pass
663
 
    
664
 
    # ReceivedSecret - signal
665
 
    @dbus.service.signal(_interface)
666
 
    def ReceivedSecret(self):
667
 
        "D-Bus signal"
668
 
        pass
669
 
    
670
 
    # Rejected - signal
671
 
    @dbus.service.signal(_interface)
672
 
    def Rejected(self):
673
 
        "D-Bus signal"
674
 
        pass
675
 
    
676
 
    # SetChecker - method
677
 
    @dbus.service.method(_interface, in_signature=u"s")
678
 
    def SetChecker(self, checker):
679
 
        "D-Bus setter method"
680
 
        self.checker_command = checker
681
 
        # Emit D-Bus signal
682
 
        self.PropertyChanged(dbus.String(u"checker"),
683
 
                             dbus.String(self.checker_command,
684
 
                                         variant_level=1))
685
 
    
686
 
    # SetHost - method
687
 
    @dbus.service.method(_interface, in_signature=u"s")
688
 
    def SetHost(self, host):
689
 
        "D-Bus setter method"
690
 
        self.host = host
691
 
        # Emit D-Bus signal
692
 
        self.PropertyChanged(dbus.String(u"host"),
693
 
                             dbus.String(self.host, variant_level=1))
694
 
    
695
 
    # SetInterval - method
696
 
    @dbus.service.method(_interface, in_signature=u"t")
697
 
    def SetInterval(self, milliseconds):
698
 
        self.interval = datetime.timedelta(0, 0, 0, milliseconds)
699
 
        # Emit D-Bus signal
700
 
        self.PropertyChanged(dbus.String(u"interval"),
701
 
                             (dbus.UInt64(self.interval_milliseconds(),
702
 
                                          variant_level=1)))
703
 
    
704
 
    # SetSecret - method
705
 
    @dbus.service.method(_interface, in_signature=u"ay",
706
 
                         byte_arrays=True)
707
 
    def SetSecret(self, secret):
708
 
        "D-Bus setter method"
709
 
        self.secret = str(secret)
710
 
    
711
 
    # SetTimeout - method
712
 
    @dbus.service.method(_interface, in_signature=u"t")
713
 
    def SetTimeout(self, milliseconds):
714
 
        self.timeout = datetime.timedelta(0, 0, 0, milliseconds)
715
 
        # Emit D-Bus signal
716
 
        self.PropertyChanged(dbus.String(u"timeout"),
717
 
                             (dbus.UInt64(self.timeout_milliseconds(),
718
 
                                          variant_level=1)))
719
 
    
720
 
    # Enable - method
721
 
    @dbus.service.method(_interface)
722
 
    def Enable(self):
723
 
        "D-Bus method"
724
 
        self.enable()
725
 
    
726
 
    # StartChecker - method
727
 
    @dbus.service.method(_interface)
728
 
    def StartChecker(self):
729
 
        "D-Bus method"
730
 
        self.start_checker()
731
 
    
732
 
    # Disable - method
733
 
    @dbus.service.method(_interface)
734
 
    def Disable(self):
735
 
        "D-Bus method"
736
 
        self.disable()
737
 
    
738
 
    # StopChecker - method
739
 
    @dbus.service.method(_interface)
740
 
    def StopChecker(self):
741
 
        self.stop_checker()
742
 
    
743
 
    del _interface
744
 
 
745
 
 
746
 
class ClientHandler(socketserver.BaseRequestHandler, object):
747
 
    """A class to handle client connections.
748
 
    
749
 
    Instantiated once for each connection to handle it.
 
388
def peer_certificate(session):
 
389
    "Return the peer's OpenPGP certificate as a bytestring"
 
390
    # If not an OpenPGP certificate...
 
391
    if gnutls.library.functions.gnutls_certificate_type_get\
 
392
            (session._c_object) \
 
393
           != gnutls.library.constants.GNUTLS_CRT_OPENPGP:
 
394
        # ...do the normal thing
 
395
        return session.peer_certificate
 
396
    list_size = ctypes.c_uint()
 
397
    cert_list = gnutls.library.functions.gnutls_certificate_get_peers\
 
398
        (session._c_object, ctypes.byref(list_size))
 
399
    if list_size.value == 0:
 
400
        return None
 
401
    cert = cert_list[0]
 
402
    return ctypes.string_at(cert.data, cert.size)
 
403
 
 
404
 
 
405
def fingerprint(openpgp):
 
406
    "Convert an OpenPGP bytestring to a hexdigit fingerprint string"
 
407
    # New GnuTLS "datum" with the OpenPGP public key
 
408
    datum = gnutls.library.types.gnutls_datum_t\
 
409
        (ctypes.cast(ctypes.c_char_p(openpgp),
 
410
                     ctypes.POINTER(ctypes.c_ubyte)),
 
411
         ctypes.c_uint(len(openpgp)))
 
412
    # New empty GnuTLS certificate
 
413
    crt = gnutls.library.types.gnutls_openpgp_crt_t()
 
414
    gnutls.library.functions.gnutls_openpgp_crt_init\
 
415
        (ctypes.byref(crt))
 
416
    # Import the OpenPGP public key into the certificate
 
417
    gnutls.library.functions.gnutls_openpgp_crt_import\
 
418
                    (crt, ctypes.byref(datum),
 
419
                     gnutls.library.constants.GNUTLS_OPENPGP_FMT_RAW)
 
420
    # Verify the self signature in the key
 
421
    crtverify = ctypes.c_uint()
 
422
    gnutls.library.functions.gnutls_openpgp_crt_verify_self\
 
423
        (crt, 0, ctypes.byref(crtverify))
 
424
    if crtverify.value != 0:
 
425
        gnutls.library.functions.gnutls_openpgp_crt_deinit(crt)
 
426
        raise gnutls.errors.CertificateSecurityError("Verify failed")
 
427
    # New buffer for the fingerprint
 
428
    buf = ctypes.create_string_buffer(20)
 
429
    buf_len = ctypes.c_size_t()
 
430
    # Get the fingerprint from the certificate into the buffer
 
431
    gnutls.library.functions.gnutls_openpgp_crt_get_fingerprint\
 
432
        (crt, ctypes.byref(buf), ctypes.byref(buf_len))
 
433
    # Deinit the certificate
 
434
    gnutls.library.functions.gnutls_openpgp_crt_deinit(crt)
 
435
    # Convert the buffer to a Python bytestring
 
436
    fpr = ctypes.string_at(buf, buf_len.value)
 
437
    # Convert the bytestring to hexadecimal notation
 
438
    hex_fpr = u''.join(u"%02X" % ord(char) for char in fpr)
 
439
    return hex_fpr
 
440
 
 
441
 
 
442
class TCP_handler(SocketServer.BaseRequestHandler, object):
 
443
    """A TCP request handler class.
 
444
    Instantiated by IPv6_TCPServer for each request to handle it.
750
445
    Note: This will run in its own forked process."""
751
446
    
752
447
    def handle(self):
753
448
        logger.info(u"TCP connection from: %s",
754
 
                    unicode(self.client_address))
755
 
        logger.debug(u"IPC Pipe FD: %d", self.server.pipe[1])
756
 
        # Open IPC pipe to parent process
757
 
        with closing(os.fdopen(self.server.pipe[1], u"w", 1)) as ipc:
758
 
            session = (gnutls.connection
759
 
                       .ClientSession(self.request,
760
 
                                      gnutls.connection
761
 
                                      .X509Credentials()))
762
 
            
763
 
            line = self.request.makefile().readline()
764
 
            logger.debug(u"Protocol version: %r", line)
765
 
            try:
766
 
                if int(line.strip().split()[0]) > 1:
767
 
                    raise RuntimeError
768
 
            except (ValueError, IndexError, RuntimeError), error:
769
 
                logger.error(u"Unknown protocol version: %s", error)
770
 
                return
771
 
            
772
 
            # Note: gnutls.connection.X509Credentials is really a
773
 
            # generic GnuTLS certificate credentials object so long as
774
 
            # no X.509 keys are added to it.  Therefore, we can use it
775
 
            # here despite using OpenPGP certificates.
776
 
            
777
 
            #priority = u':'.join((u"NONE", u"+VERS-TLS1.1",
778
 
            #                      u"+AES-256-CBC", u"+SHA1",
779
 
            #                      u"+COMP-NULL", u"+CTYPE-OPENPGP",
780
 
            #                      u"+DHE-DSS"))
781
 
            # Use a fallback default, since this MUST be set.
782
 
            priority = self.server.gnutls_priority
783
 
            if priority is None:
784
 
                priority = u"NORMAL"
785
 
            (gnutls.library.functions
786
 
             .gnutls_priority_set_direct(session._c_object,
787
 
                                         priority, None))
788
 
            
789
 
            try:
790
 
                session.handshake()
791
 
            except gnutls.errors.GNUTLSError, error:
792
 
                logger.warning(u"Handshake failed: %s", error)
793
 
                # Do not run session.bye() here: the session is not
794
 
                # established.  Just abandon the request.
795
 
                return
796
 
            logger.debug(u"Handshake succeeded")
797
 
            try:
798
 
                fpr = self.fingerprint(self.peer_certificate(session))
799
 
            except (TypeError, gnutls.errors.GNUTLSError), error:
800
 
                logger.warning(u"Bad certificate: %s", error)
801
 
                session.bye()
802
 
                return
803
 
            logger.debug(u"Fingerprint: %s", fpr)
804
 
            
805
 
            for c in self.server.clients:
806
 
                if c.fingerprint == fpr:
807
 
                    client = c
808
 
                    break
809
 
            else:
810
 
                ipc.write(u"NOTFOUND %s\n" % fpr)
811
 
                session.bye()
812
 
                return
813
 
            # Have to check if client.still_valid(), since it is
814
 
            # possible that the client timed out while establishing
815
 
            # the GnuTLS session.
816
 
            if not client.still_valid():
817
 
                ipc.write(u"INVALID %s\n" % client.name)
818
 
                session.bye()
819
 
                return
820
 
            ipc.write(u"SENDING %s\n" % client.name)
821
 
            sent_size = 0
822
 
            while sent_size < len(client.secret):
823
 
                sent = session.send(client.secret[sent_size:])
824
 
                logger.debug(u"Sent: %d, remaining: %d",
825
 
                             sent, len(client.secret)
826
 
                             - (sent_size + sent))
827
 
                sent_size += sent
828
 
            session.bye()
829
 
    
830
 
    @staticmethod
831
 
    def peer_certificate(session):
832
 
        "Return the peer's OpenPGP certificate as a bytestring"
833
 
        # If not an OpenPGP certificate...
834
 
        if (gnutls.library.functions
835
 
            .gnutls_certificate_type_get(session._c_object)
836
 
            != gnutls.library.constants.GNUTLS_CRT_OPENPGP):
837
 
            # ...do the normal thing
838
 
            return session.peer_certificate
839
 
        list_size = ctypes.c_uint(1)
840
 
        cert_list = (gnutls.library.functions
841
 
                     .gnutls_certificate_get_peers
842
 
                     (session._c_object, ctypes.byref(list_size)))
843
 
        if not bool(cert_list) and list_size.value != 0:
844
 
            raise gnutls.errors.GNUTLSError(u"error getting peer"
845
 
                                            u" certificate")
846
 
        if list_size.value == 0:
847
 
            return None
848
 
        cert = cert_list[0]
849
 
        return ctypes.string_at(cert.data, cert.size)
850
 
    
851
 
    @staticmethod
852
 
    def fingerprint(openpgp):
853
 
        "Convert an OpenPGP bytestring to a hexdigit fingerprint"
854
 
        # New GnuTLS "datum" with the OpenPGP public key
855
 
        datum = (gnutls.library.types
856
 
                 .gnutls_datum_t(ctypes.cast(ctypes.c_char_p(openpgp),
857
 
                                             ctypes.POINTER
858
 
                                             (ctypes.c_ubyte)),
859
 
                                 ctypes.c_uint(len(openpgp))))
860
 
        # New empty GnuTLS certificate
861
 
        crt = gnutls.library.types.gnutls_openpgp_crt_t()
862
 
        (gnutls.library.functions
863
 
         .gnutls_openpgp_crt_init(ctypes.byref(crt)))
864
 
        # Import the OpenPGP public key into the certificate
865
 
        (gnutls.library.functions
866
 
         .gnutls_openpgp_crt_import(crt, ctypes.byref(datum),
867
 
                                    gnutls.library.constants
868
 
                                    .GNUTLS_OPENPGP_FMT_RAW))
869
 
        # Verify the self signature in the key
870
 
        crtverify = ctypes.c_uint()
871
 
        (gnutls.library.functions
872
 
         .gnutls_openpgp_crt_verify_self(crt, 0,
873
 
                                         ctypes.byref(crtverify)))
874
 
        if crtverify.value != 0:
875
 
            gnutls.library.functions.gnutls_openpgp_crt_deinit(crt)
876
 
            raise (gnutls.errors.CertificateSecurityError
877
 
                   (u"Verify failed"))
878
 
        # New buffer for the fingerprint
879
 
        buf = ctypes.create_string_buffer(20)
880
 
        buf_len = ctypes.c_size_t()
881
 
        # Get the fingerprint from the certificate into the buffer
882
 
        (gnutls.library.functions
883
 
         .gnutls_openpgp_crt_get_fingerprint(crt, ctypes.byref(buf),
884
 
                                             ctypes.byref(buf_len)))
885
 
        # Deinit the certificate
886
 
        gnutls.library.functions.gnutls_openpgp_crt_deinit(crt)
887
 
        # Convert the buffer to a Python bytestring
888
 
        fpr = ctypes.string_at(buf, buf_len.value)
889
 
        # Convert the bytestring to hexadecimal notation
890
 
        hex_fpr = u''.join(u"%02X" % ord(char) for char in fpr)
891
 
        return hex_fpr
892
 
 
893
 
 
894
 
class ForkingMixInWithPipe(socketserver.ForkingMixIn, object):
895
 
    """Like socketserver.ForkingMixIn, but also pass a pipe.
896
 
    
897
 
    Assumes a gobject.MainLoop event loop.
898
 
    """
899
 
    def process_request(self, request, client_address):
900
 
        """Overrides and wraps the original process_request().
901
 
        
902
 
        This function creates a new pipe in self.pipe 
903
 
        """
904
 
        self.pipe = os.pipe()
905
 
        super(ForkingMixInWithPipe,
906
 
              self).process_request(request, client_address)
907
 
        os.close(self.pipe[1])  # close write end
908
 
        # Call "handle_ipc" for both data and EOF events
909
 
        gobject.io_add_watch(self.pipe[0],
910
 
                             gobject.IO_IN | gobject.IO_HUP,
911
 
                             self.handle_ipc)
912
 
    def handle_ipc(source, condition):
913
 
        """Dummy function; override as necessary"""
914
 
        os.close(source)
915
 
        return False
916
 
 
917
 
 
918
 
class IPv6_TCPServer(ForkingMixInWithPipe,
919
 
                     socketserver.TCPServer, object):
920
 
    """IPv6-capable TCP server.  Accepts 'None' as address and/or port
921
 
    
 
449
                     unicode(self.client_address))
 
450
        session = gnutls.connection.ClientSession\
 
451
                  (self.request, gnutls.connection.X509Credentials())
 
452
        
 
453
        line = self.request.makefile().readline()
 
454
        logger.debug(u"Protocol version: %r", line)
 
455
        try:
 
456
            if int(line.strip().split()[0]) > 1:
 
457
                raise RuntimeError
 
458
        except (ValueError, IndexError, RuntimeError), error:
 
459
            logger.error(u"Unknown protocol version: %s", error)
 
460
            return
 
461
        
 
462
        # Note: gnutls.connection.X509Credentials is really a generic
 
463
        # GnuTLS certificate credentials object so long as no X.509
 
464
        # keys are added to it.  Therefore, we can use it here despite
 
465
        # using OpenPGP certificates.
 
466
        
 
467
        #priority = ':'.join(("NONE", "+VERS-TLS1.1", "+AES-256-CBC",
 
468
        #                "+SHA1", "+COMP-NULL", "+CTYPE-OPENPGP",
 
469
        #                "+DHE-DSS"))
 
470
        priority = "NORMAL"             # Fallback default, since this
 
471
                                        # MUST be set.
 
472
        if self.server.settings["priority"]:
 
473
            priority = self.server.settings["priority"]
 
474
        gnutls.library.functions.gnutls_priority_set_direct\
 
475
            (session._c_object, priority, None)
 
476
        
 
477
        try:
 
478
            session.handshake()
 
479
        except gnutls.errors.GNUTLSError, error:
 
480
            logger.warning(u"Handshake failed: %s", error)
 
481
            # Do not run session.bye() here: the session is not
 
482
            # established.  Just abandon the request.
 
483
            return
 
484
        try:
 
485
            fpr = fingerprint(peer_certificate(session))
 
486
        except (TypeError, gnutls.errors.GNUTLSError), error:
 
487
            logger.warning(u"Bad certificate: %s", error)
 
488
            session.bye()
 
489
            return
 
490
        logger.debug(u"Fingerprint: %s", fpr)
 
491
        client = None
 
492
        for c in self.server.clients:
 
493
            if c.fingerprint == fpr:
 
494
                client = c
 
495
                break
 
496
        if not client:
 
497
            logger.warning(u"Client not found for fingerprint: %s",
 
498
                           fpr)
 
499
            session.bye()
 
500
            return
 
501
        # Have to check if client.still_valid(), since it is possible
 
502
        # that the client timed out while establishing the GnuTLS
 
503
        # session.
 
504
        if not client.still_valid():
 
505
            logger.warning(u"Client %(name)s is invalid",
 
506
                           vars(client))
 
507
            session.bye()
 
508
            return
 
509
        sent_size = 0
 
510
        while sent_size < len(client.secret):
 
511
            sent = session.send(client.secret[sent_size:])
 
512
            logger.debug(u"Sent: %d, remaining: %d",
 
513
                         sent, len(client.secret)
 
514
                         - (sent_size + sent))
 
515
            sent_size += sent
 
516
        session.bye()
 
517
 
 
518
 
 
519
class IPv6_TCPServer(SocketServer.ForkingTCPServer, object):
 
520
    """IPv6 TCP server.  Accepts 'None' as address and/or port.
922
521
    Attributes:
 
522
        settings:       Server settings
 
523
        clients:        Set() of Client objects
923
524
        enabled:        Boolean; whether this server is activated yet
924
 
        interface:      None or a network interface name (string)
925
 
        use_ipv6:       Boolean; to use IPv6 or not
926
 
        ----
927
 
        clients:        set of Client objects
928
 
        gnutls_priority GnuTLS priority string
929
 
        use_dbus:       Boolean; to emit D-Bus signals or not
930
525
    """
931
 
    def __init__(self, server_address, RequestHandlerClass,
932
 
                 interface=None, use_ipv6=True, clients=None,
933
 
                 gnutls_priority=None, use_dbus=True):
 
526
    address_family = socket.AF_INET6
 
527
    def __init__(self, *args, **kwargs):
 
528
        if "settings" in kwargs:
 
529
            self.settings = kwargs["settings"]
 
530
            del kwargs["settings"]
 
531
        if "clients" in kwargs:
 
532
            self.clients = kwargs["clients"]
 
533
            del kwargs["clients"]
934
534
        self.enabled = False
935
 
        self.interface = interface
936
 
        if use_ipv6:
937
 
            self.address_family = socket.AF_INET6
938
 
        self.clients = clients
939
 
        self.use_dbus = use_dbus
940
 
        self.gnutls_priority = gnutls_priority
941
 
        socketserver.TCPServer.__init__(self, server_address,
942
 
                                        RequestHandlerClass)
 
535
        super(IPv6_TCPServer, self).__init__(*args, **kwargs)
943
536
    def server_bind(self):
944
537
        """This overrides the normal server_bind() function
945
538
        to bind to an interface if one was specified, and also NOT to
946
539
        bind to an address or port if they were not specified."""
947
 
        if self.interface is not None:
 
540
        if self.settings["interface"]:
 
541
            # 25 is from /usr/include/asm-i486/socket.h
 
542
            SO_BINDTODEVICE = getattr(socket, "SO_BINDTODEVICE", 25)
948
543
            try:
949
544
                self.socket.setsockopt(socket.SOL_SOCKET,
950
545
                                       SO_BINDTODEVICE,
951
 
                                       str(self.interface + u'\0'))
 
546
                                       self.settings["interface"])
952
547
            except socket.error, error:
953
548
                if error[0] == errno.EPERM:
954
549
                    logger.error(u"No permission to"
955
550
                                 u" bind to interface %s",
956
 
                                 self.interface)
 
551
                                 self.settings["interface"])
957
552
                else:
958
 
                    raise
 
553
                    raise error
959
554
        # Only bind(2) the socket if we really need to.
960
555
        if self.server_address[0] or self.server_address[1]:
961
556
            if not self.server_address[0]:
962
 
                if self.address_family == socket.AF_INET6:
963
 
                    any_address = u"::" # in6addr_any
964
 
                else:
965
 
                    any_address = socket.INADDR_ANY
966
 
                self.server_address = (any_address,
 
557
                in6addr_any = "::"
 
558
                self.server_address = (in6addr_any,
967
559
                                       self.server_address[1])
968
560
            elif not self.server_address[1]:
969
561
                self.server_address = (self.server_address[0],
970
562
                                       0)
971
 
#                 if self.interface:
 
563
#                 if self.settings["interface"]:
972
564
#                     self.server_address = (self.server_address[0],
973
565
#                                            0, # port
974
566
#                                            0, # flowinfo
975
567
#                                            if_nametoindex
976
 
#                                            (self.interface))
977
 
            return socketserver.TCPServer.server_bind(self)
 
568
#                                            (self.settings
 
569
#                                             ["interface"]))
 
570
            return super(IPv6_TCPServer, self).server_bind()
978
571
    def server_activate(self):
979
572
        if self.enabled:
980
 
            return socketserver.TCPServer.server_activate(self)
 
573
            return super(IPv6_TCPServer, self).server_activate()
981
574
    def enable(self):
982
575
        self.enabled = True
983
 
    def handle_ipc(self, source, condition, file_objects={}):
984
 
        condition_names = {
985
 
            gobject.IO_IN: u"IN",   # There is data to read.
986
 
            gobject.IO_OUT: u"OUT", # Data can be written (without
987
 
                                    # blocking).
988
 
            gobject.IO_PRI: u"PRI", # There is urgent data to read.
989
 
            gobject.IO_ERR: u"ERR", # Error condition.
990
 
            gobject.IO_HUP: u"HUP"  # Hung up (the connection has been
991
 
                                    # broken, usually for pipes and
992
 
                                    # sockets).
993
 
            }
994
 
        conditions_string = ' | '.join(name
995
 
                                       for cond, name in
996
 
                                       condition_names.iteritems()
997
 
                                       if cond & condition)
998
 
        logger.debug(u"Handling IPC: FD = %d, condition = %s", source,
999
 
                     conditions_string)
1000
 
        
1001
 
        # Turn the pipe file descriptor into a Python file object
1002
 
        if source not in file_objects:
1003
 
            file_objects[source] = os.fdopen(source, u"r", 1)
1004
 
        
1005
 
        # Read a line from the file object
1006
 
        cmdline = file_objects[source].readline()
1007
 
        if not cmdline:             # Empty line means end of file
1008
 
            # close the IPC pipe
1009
 
            file_objects[source].close()
1010
 
            del file_objects[source]
1011
 
            
1012
 
            # Stop calling this function
1013
 
            return False
1014
 
        
1015
 
        logger.debug(u"IPC command: %r", cmdline)
1016
 
        
1017
 
        # Parse and act on command
1018
 
        cmd, args = cmdline.rstrip(u"\r\n").split(None, 1)
1019
 
        
1020
 
        if cmd == u"NOTFOUND":
1021
 
            logger.warning(u"Client not found for fingerprint: %s",
1022
 
                           args)
1023
 
            if self.use_dbus:
1024
 
                # Emit D-Bus signal
1025
 
                mandos_dbus_service.ClientNotFound(args)
1026
 
        elif cmd == u"INVALID":
1027
 
            for client in self.clients:
1028
 
                if client.name == args:
1029
 
                    logger.warning(u"Client %s is invalid", args)
1030
 
                    if self.use_dbus:
1031
 
                        # Emit D-Bus signal
1032
 
                        client.Rejected()
1033
 
                    break
1034
 
            else:
1035
 
                logger.error(u"Unknown client %s is invalid", args)
1036
 
        elif cmd == u"SENDING":
1037
 
            for client in self.clients:
1038
 
                if client.name == args:
1039
 
                    logger.info(u"Sending secret to %s", client.name)
1040
 
                    client.checked_ok()
1041
 
                    if self.use_dbus:
1042
 
                        # Emit D-Bus signal
1043
 
                        client.ReceivedSecret()
1044
 
                    break
1045
 
            else:
1046
 
                logger.error(u"Sending secret to unknown client %s",
1047
 
                             args)
1048
 
        else:
1049
 
            logger.error(u"Unknown IPC command: %r", cmdline)
1050
 
        
1051
 
        # Keep calling this function
1052
 
        return True
1053
576
 
1054
577
 
1055
578
def string_to_delta(interval):
1056
579
    """Parse a string and return a datetime.timedelta
1057
 
    
1058
 
    >>> string_to_delta(u'7d')
 
580
 
 
581
    >>> string_to_delta('7d')
1059
582
    datetime.timedelta(7)
1060
 
    >>> string_to_delta(u'60s')
 
583
    >>> string_to_delta('60s')
1061
584
    datetime.timedelta(0, 60)
1062
 
    >>> string_to_delta(u'60m')
 
585
    >>> string_to_delta('60m')
1063
586
    datetime.timedelta(0, 3600)
1064
 
    >>> string_to_delta(u'24h')
 
587
    >>> string_to_delta('24h')
1065
588
    datetime.timedelta(1)
1066
589
    >>> string_to_delta(u'1w')
1067
590
    datetime.timedelta(7)
1068
 
    >>> string_to_delta(u'5m 30s')
 
591
    >>> string_to_delta('5m 30s')
1069
592
    datetime.timedelta(0, 330)
1070
593
    """
1071
594
    timevalue = datetime.timedelta(0)
1091
614
    return timevalue
1092
615
 
1093
616
 
 
617
def server_state_changed(state):
 
618
    """Derived from the Avahi example code"""
 
619
    if state == avahi.SERVER_COLLISION:
 
620
        logger.error(u"Zeroconf server name collision")
 
621
        service.remove()
 
622
    elif state == avahi.SERVER_RUNNING:
 
623
        service.add()
 
624
 
 
625
 
 
626
def entry_group_state_changed(state, error):
 
627
    """Derived from the Avahi example code"""
 
628
    logger.debug(u"Avahi state change: %i", state)
 
629
    
 
630
    if state == avahi.ENTRY_GROUP_ESTABLISHED:
 
631
        logger.debug(u"Zeroconf service established.")
 
632
    elif state == avahi.ENTRY_GROUP_COLLISION:
 
633
        logger.warning(u"Zeroconf service name collision.")
 
634
        service.rename()
 
635
    elif state == avahi.ENTRY_GROUP_FAILURE:
 
636
        logger.critical(u"Avahi: Error in group state changed %s",
 
637
                        unicode(error))
 
638
        raise AvahiGroupError("State changed: %s", str(error))
 
639
 
1094
640
def if_nametoindex(interface):
1095
 
    """Call the C function if_nametoindex(), or equivalent
1096
 
    
1097
 
    Note: This function cannot accept a unicode string."""
 
641
    """Call the C function if_nametoindex(), or equivalent"""
1098
642
    global if_nametoindex
1099
643
    try:
1100
 
        if_nametoindex = (ctypes.cdll.LoadLibrary
1101
 
                          (ctypes.util.find_library(u"c"))
1102
 
                          .if_nametoindex)
 
644
        if_nametoindex = ctypes.cdll.LoadLibrary\
 
645
            (ctypes.util.find_library("c")).if_nametoindex
1103
646
    except (OSError, AttributeError):
1104
 
        logger.warning(u"Doing if_nametoindex the hard way")
 
647
        if "struct" not in sys.modules:
 
648
            import struct
 
649
        if "fcntl" not in sys.modules:
 
650
            import fcntl
1105
651
        def if_nametoindex(interface):
1106
652
            "Get an interface index the hard way, i.e. using fcntl()"
1107
653
            SIOCGIFINDEX = 0x8933  # From /usr/include/linux/sockios.h
1108
 
            with closing(socket.socket()) as s:
1109
 
                ifreq = fcntl.ioctl(s, SIOCGIFINDEX,
1110
 
                                    struct.pack(str(u"16s16x"),
1111
 
                                                interface))
1112
 
            interface_index = struct.unpack(str(u"I"),
1113
 
                                            ifreq[16:20])[0]
 
654
            s = socket.socket()
 
655
            ifreq = fcntl.ioctl(s, SIOCGIFINDEX,
 
656
                                struct.pack("16s16x", interface))
 
657
            s.close()
 
658
            interface_index = struct.unpack("I", ifreq[16:20])[0]
1114
659
            return interface_index
1115
660
    return if_nametoindex(interface)
1116
661
 
1117
662
 
1118
663
def daemon(nochdir = False, noclose = False):
1119
664
    """See daemon(3).  Standard BSD Unix function.
1120
 
    
1121
665
    This should really exist as os.daemon, but it doesn't (yet)."""
1122
666
    if os.fork():
1123
667
        sys.exit()
1124
668
    os.setsid()
1125
669
    if not nochdir:
1126
 
        os.chdir(u"/")
 
670
        os.chdir("/")
1127
671
    if os.fork():
1128
672
        sys.exit()
1129
673
    if not noclose:
1131
675
        null = os.open(os.path.devnull, os.O_NOCTTY | os.O_RDWR)
1132
676
        if not stat.S_ISCHR(os.fstat(null).st_mode):
1133
677
            raise OSError(errno.ENODEV,
1134
 
                          u"/dev/null not a character device")
 
678
                          "/dev/null not a character device")
1135
679
        os.dup2(null, sys.stdin.fileno())
1136
680
        os.dup2(null, sys.stdout.fileno())
1137
681
        os.dup2(null, sys.stderr.fileno())
1140
684
 
1141
685
 
1142
686
def main():
1143
 
    
1144
 
    ######################################################################
1145
 
    # Parsing of options, both command line and config file
1146
 
    
1147
 
    parser = optparse.OptionParser(version = "%%prog %s" % version)
1148
 
    parser.add_option("-i", u"--interface", type=u"string",
1149
 
                      metavar="IF", help=u"Bind to interface IF")
1150
 
    parser.add_option("-a", u"--address", type=u"string",
1151
 
                      help=u"Address to listen for requests on")
1152
 
    parser.add_option("-p", u"--port", type=u"int",
1153
 
                      help=u"Port number to receive requests on")
1154
 
    parser.add_option("--check", action=u"store_true",
1155
 
                      help=u"Run self-test")
1156
 
    parser.add_option("--debug", action=u"store_true",
1157
 
                      help=u"Debug mode; run in foreground and log to"
1158
 
                      u" terminal")
1159
 
    parser.add_option("--priority", type=u"string", help=u"GnuTLS"
1160
 
                      u" priority string (see GnuTLS documentation)")
1161
 
    parser.add_option("--servicename", type=u"string",
1162
 
                      metavar=u"NAME", help=u"Zeroconf service name")
1163
 
    parser.add_option("--configdir", type=u"string",
1164
 
                      default=u"/etc/mandos", metavar=u"DIR",
1165
 
                      help=u"Directory to search for configuration"
1166
 
                      u" files")
1167
 
    parser.add_option("--no-dbus", action=u"store_false",
1168
 
                      dest=u"use_dbus", help=u"Do not provide D-Bus"
1169
 
                      u" system bus interface")
1170
 
    parser.add_option("--no-ipv6", action=u"store_false",
1171
 
                      dest=u"use_ipv6", help=u"Do not use IPv6")
 
687
    parser = OptionParser(version = "%%prog %s" % version)
 
688
    parser.add_option("-i", "--interface", type="string",
 
689
                      metavar="IF", help="Bind to interface IF")
 
690
    parser.add_option("-a", "--address", type="string",
 
691
                      help="Address to listen for requests on")
 
692
    parser.add_option("-p", "--port", type="int",
 
693
                      help="Port number to receive requests on")
 
694
    parser.add_option("--check", action="store_true", default=False,
 
695
                      help="Run self-test")
 
696
    parser.add_option("--debug", action="store_true",
 
697
                      help="Debug mode; run in foreground and log to"
 
698
                      " terminal")
 
699
    parser.add_option("--priority", type="string", help="GnuTLS"
 
700
                      " priority string (see GnuTLS documentation)")
 
701
    parser.add_option("--servicename", type="string", metavar="NAME",
 
702
                      help="Zeroconf service name")
 
703
    parser.add_option("--configdir", type="string",
 
704
                      default="/etc/mandos", metavar="DIR",
 
705
                      help="Directory to search for configuration"
 
706
                      " files")
1172
707
    options = parser.parse_args()[0]
1173
708
    
1174
709
    if options.check:
1177
712
        sys.exit()
1178
713
    
1179
714
    # Default values for config file for server-global settings
1180
 
    server_defaults = { u"interface": u"",
1181
 
                        u"address": u"",
1182
 
                        u"port": u"",
1183
 
                        u"debug": u"False",
1184
 
                        u"priority":
1185
 
                        u"SECURE256:!CTYPE-X.509:+CTYPE-OPENPGP",
1186
 
                        u"servicename": u"Mandos",
1187
 
                        u"use_dbus": u"True",
1188
 
                        u"use_ipv6": u"True",
 
715
    server_defaults = { "interface": "",
 
716
                        "address": "",
 
717
                        "port": "",
 
718
                        "debug": "False",
 
719
                        "priority":
 
720
                        "SECURE256:!CTYPE-X.509:+CTYPE-OPENPGP",
 
721
                        "servicename": "Mandos",
1189
722
                        }
1190
723
    
1191
724
    # Parse config file for server-global settings
1192
 
    server_config = configparser.SafeConfigParser(server_defaults)
 
725
    server_config = ConfigParser.SafeConfigParser(server_defaults)
1193
726
    del server_defaults
1194
 
    server_config.read(os.path.join(options.configdir,
1195
 
                                    u"mandos.conf"))
 
727
    server_config.read(os.path.join(options.configdir, "mandos.conf"))
1196
728
    # Convert the SafeConfigParser object to a dict
1197
729
    server_settings = server_config.defaults()
1198
 
    # Use the appropriate methods on the non-string config options
1199
 
    for option in (u"debug", u"use_dbus", u"use_ipv6"):
1200
 
        server_settings[option] = server_config.getboolean(u"DEFAULT",
1201
 
                                                           option)
1202
 
    if server_settings["port"]:
1203
 
        server_settings["port"] = server_config.getint(u"DEFAULT",
1204
 
                                                       u"port")
 
730
    # Use getboolean on the boolean config option
 
731
    server_settings["debug"] = server_config.getboolean\
 
732
                               ("DEFAULT", "debug")
1205
733
    del server_config
1206
734
    
1207
735
    # Override the settings from the config file with command line
1208
736
    # options, if set.
1209
 
    for option in (u"interface", u"address", u"port", u"debug",
1210
 
                   u"priority", u"servicename", u"configdir",
1211
 
                   u"use_dbus", u"use_ipv6"):
 
737
    for option in ("interface", "address", "port", "debug",
 
738
                   "priority", "servicename", "configdir"):
1212
739
        value = getattr(options, option)
1213
740
        if value is not None:
1214
741
            server_settings[option] = value
1215
742
    del options
1216
 
    # Force all strings to be unicode
1217
 
    for option in server_settings.keys():
1218
 
        if type(server_settings[option]) is str:
1219
 
            server_settings[option] = unicode(server_settings[option])
1220
743
    # Now we have our good server settings in "server_settings"
1221
744
    
1222
 
    ##################################################################
1223
 
    
1224
 
    # For convenience
1225
 
    debug = server_settings[u"debug"]
1226
 
    use_dbus = server_settings[u"use_dbus"]
1227
 
    use_ipv6 = server_settings[u"use_ipv6"]
 
745
    debug = server_settings["debug"]
1228
746
    
1229
747
    if not debug:
1230
748
        syslogger.setLevel(logging.WARNING)
1231
749
        console.setLevel(logging.WARNING)
1232
750
    
1233
 
    if server_settings[u"servicename"] != u"Mandos":
1234
 
        syslogger.setFormatter(logging.Formatter
1235
 
                               (u'Mandos (%s) [%%(process)d]:'
1236
 
                                u' %%(levelname)s: %%(message)s'
1237
 
                                % server_settings[u"servicename"]))
 
751
    if server_settings["servicename"] != "Mandos":
 
752
        syslogger.setFormatter(logging.Formatter\
 
753
                               ('Mandos (%s): %%(levelname)s:'
 
754
                                ' %%(message)s'
 
755
                                % server_settings["servicename"]))
1238
756
    
1239
757
    # Parse config file with clients
1240
 
    client_defaults = { u"timeout": u"1h",
1241
 
                        u"interval": u"5m",
1242
 
                        u"checker": u"fping -q -- %%(host)s",
1243
 
                        u"host": u"",
 
758
    client_defaults = { "timeout": "1h",
 
759
                        "interval": "5m",
 
760
                        "checker": "fping -q -- %(host)s",
 
761
                        "host": "",
1244
762
                        }
1245
 
    client_config = configparser.SafeConfigParser(client_defaults)
1246
 
    client_config.read(os.path.join(server_settings[u"configdir"],
1247
 
                                    u"clients.conf"))
1248
 
    
1249
 
    global mandos_dbus_service
1250
 
    mandos_dbus_service = None
1251
 
    
1252
 
    clients = set()
1253
 
    tcp_server = IPv6_TCPServer((server_settings[u"address"],
1254
 
                                 server_settings[u"port"]),
1255
 
                                ClientHandler,
1256
 
                                interface=
1257
 
                                server_settings[u"interface"],
1258
 
                                use_ipv6=use_ipv6,
1259
 
                                clients=clients,
1260
 
                                gnutls_priority=
1261
 
                                server_settings[u"priority"],
1262
 
                                use_dbus=use_dbus)
1263
 
    pidfilename = u"/var/run/mandos.pid"
1264
 
    try:
1265
 
        pidfile = open(pidfilename, u"w")
1266
 
    except IOError:
1267
 
        logger.error(u"Could not open file %r", pidfilename)
1268
 
    
1269
 
    try:
1270
 
        uid = pwd.getpwnam(u"_mandos").pw_uid
1271
 
        gid = pwd.getpwnam(u"_mandos").pw_gid
1272
 
    except KeyError:
1273
 
        try:
1274
 
            uid = pwd.getpwnam(u"mandos").pw_uid
1275
 
            gid = pwd.getpwnam(u"mandos").pw_gid
1276
 
        except KeyError:
1277
 
            try:
1278
 
                uid = pwd.getpwnam(u"nobody").pw_uid
1279
 
                gid = pwd.getpwnam(u"nobody").pw_gid
1280
 
            except KeyError:
1281
 
                uid = 65534
1282
 
                gid = 65534
1283
 
    try:
 
763
    client_config = ConfigParser.SafeConfigParser(client_defaults)
 
764
    client_config.read(os.path.join(server_settings["configdir"],
 
765
                                    "clients.conf"))
 
766
    
 
767
    clients = Set()
 
768
    tcp_server = IPv6_TCPServer((server_settings["address"],
 
769
                                 server_settings["port"]),
 
770
                                TCP_handler,
 
771
                                settings=server_settings,
 
772
                                clients=clients)
 
773
    pidfilename = "/var/run/mandos.pid"
 
774
    try:
 
775
        pidfile = open(pidfilename, "w")
 
776
    except IOError, error:
 
777
        logger.error("Could not open file %r", pidfilename)
 
778
    
 
779
    uid = 65534
 
780
    gid = 65534
 
781
    try:
 
782
        uid = pwd.getpwnam("mandos").pw_uid
 
783
    except KeyError:
 
784
        try:
 
785
            uid = pwd.getpwnam("nobody").pw_uid
 
786
        except KeyError:
 
787
            pass
 
788
    try:
 
789
        gid = pwd.getpwnam("mandos").pw_gid
 
790
    except KeyError:
 
791
        try:
 
792
            gid = pwd.getpwnam("nogroup").pw_gid
 
793
        except KeyError:
 
794
            pass
 
795
    try:
 
796
        os.setuid(uid)
1284
797
        os.setgid(gid)
1285
 
        os.setuid(uid)
1286
798
    except OSError, error:
1287
799
        if error[0] != errno.EPERM:
1288
800
            raise error
1289
801
    
1290
 
    # Enable all possible GnuTLS debugging
1291
 
    if debug:
1292
 
        # "Use a log level over 10 to enable all debugging options."
1293
 
        # - GnuTLS manual
1294
 
        gnutls.library.functions.gnutls_global_set_log_level(11)
1295
 
        
1296
 
        @gnutls.library.types.gnutls_log_func
1297
 
        def debug_gnutls(level, string):
1298
 
            logger.debug(u"GnuTLS: %s", string[:-1])
1299
 
        
1300
 
        (gnutls.library.functions
1301
 
         .gnutls_global_set_log_function(debug_gnutls))
 
802
    global service
 
803
    service = AvahiService(name = server_settings["servicename"],
 
804
                           servicetype = "_mandos._tcp", )
 
805
    if server_settings["interface"]:
 
806
        service.interface = if_nametoindex\
 
807
                            (server_settings["interface"])
1302
808
    
1303
809
    global main_loop
 
810
    global bus
 
811
    global server
1304
812
    # From the Avahi example code
1305
813
    DBusGMainLoop(set_as_default=True )
1306
814
    main_loop = gobject.MainLoop()
1307
815
    bus = dbus.SystemBus()
 
816
    server = dbus.Interface(bus.get_object(avahi.DBUS_NAME,
 
817
                                           avahi.DBUS_PATH_SERVER),
 
818
                            avahi.DBUS_INTERFACE_SERVER)
1308
819
    # End of Avahi example code
1309
 
    if use_dbus:
1310
 
        bus_name = dbus.service.BusName(u"se.bsnet.fukt.Mandos", bus)
1311
 
    protocol = avahi.PROTO_INET6 if use_ipv6 else avahi.PROTO_INET
1312
 
    service = AvahiService(name = server_settings[u"servicename"],
1313
 
                           servicetype = u"_mandos._tcp",
1314
 
                           protocol = protocol, bus = bus)
1315
 
    if server_settings["interface"]:
1316
 
        service.interface = (if_nametoindex
1317
 
                             (str(server_settings[u"interface"])))
1318
 
    
1319
 
    client_class = Client
1320
 
    if use_dbus:
1321
 
        client_class = functools.partial(ClientDBus, bus = bus)
1322
 
    clients.update(set(
1323
 
            client_class(name = section,
1324
 
                         config= dict(client_config.items(section)))
1325
 
            for section in client_config.sections()))
 
820
    
 
821
    def remove_from_clients(client):
 
822
        clients.remove(client)
 
823
        if not clients:
 
824
            logger.critical(u"No clients left, exiting")
 
825
            sys.exit()
 
826
    
 
827
    clients.update(Set(Client(name = section,
 
828
                              stop_hook = remove_from_clients,
 
829
                              config
 
830
                              = dict(client_config.items(section)))
 
831
                       for section in client_config.sections()))
1326
832
    if not clients:
1327
 
        logger.warning(u"No clients defined")
 
833
        logger.critical(u"No clients defined")
 
834
        sys.exit(1)
1328
835
    
1329
836
    if debug:
1330
837
        # Redirect stdin so all checkers get /dev/null
1339
846
        daemon()
1340
847
    
1341
848
    try:
1342
 
        with closing(pidfile):
1343
 
            pid = os.getpid()
1344
 
            pidfile.write(str(pid) + "\n")
 
849
        pid = os.getpid()
 
850
        pidfile.write(str(pid) + "\n")
 
851
        pidfile.close()
1345
852
        del pidfile
1346
853
    except IOError:
1347
854
        logger.error(u"Could not write to file %r with PID %d",
1353
860
    
1354
861
    def cleanup():
1355
862
        "Cleanup function; run on exit"
1356
 
        service.cleanup()
 
863
        global group
 
864
        # From the Avahi example code
 
865
        if not group is None:
 
866
            group.Free()
 
867
            group = None
 
868
        # End of Avahi example code
1357
869
        
1358
870
        while clients:
1359
871
            client = clients.pop()
1360
 
            client.disable_hook = None
1361
 
            client.disable()
 
872
            client.stop_hook = None
 
873
            client.stop()
1362
874
    
1363
875
    atexit.register(cleanup)
1364
876
    
1367
879
    signal.signal(signal.SIGHUP, lambda signum, frame: sys.exit())
1368
880
    signal.signal(signal.SIGTERM, lambda signum, frame: sys.exit())
1369
881
    
1370
 
    if use_dbus:
1371
 
        class MandosDBusService(dbus.service.Object):
1372
 
            """A D-Bus proxy object"""
1373
 
            def __init__(self):
1374
 
                dbus.service.Object.__init__(self, bus, u"/")
1375
 
            _interface = u"se.bsnet.fukt.Mandos"
1376
 
            
1377
 
            @dbus.service.signal(_interface, signature=u"oa{sv}")
1378
 
            def ClientAdded(self, objpath, properties):
1379
 
                "D-Bus signal"
1380
 
                pass
1381
 
            
1382
 
            @dbus.service.signal(_interface, signature=u"s")
1383
 
            def ClientNotFound(self, fingerprint):
1384
 
                "D-Bus signal"
1385
 
                pass
1386
 
            
1387
 
            @dbus.service.signal(_interface, signature=u"os")
1388
 
            def ClientRemoved(self, objpath, name):
1389
 
                "D-Bus signal"
1390
 
                pass
1391
 
            
1392
 
            @dbus.service.method(_interface, out_signature=u"ao")
1393
 
            def GetAllClients(self):
1394
 
                "D-Bus method"
1395
 
                return dbus.Array(c.dbus_object_path for c in clients)
1396
 
            
1397
 
            @dbus.service.method(_interface,
1398
 
                                 out_signature=u"a{oa{sv}}")
1399
 
            def GetAllClientsWithProperties(self):
1400
 
                "D-Bus method"
1401
 
                return dbus.Dictionary(
1402
 
                    ((c.dbus_object_path, c.GetAllProperties())
1403
 
                     for c in clients),
1404
 
                    signature=u"oa{sv}")
1405
 
            
1406
 
            @dbus.service.method(_interface, in_signature=u"o")
1407
 
            def RemoveClient(self, object_path):
1408
 
                "D-Bus method"
1409
 
                for c in clients:
1410
 
                    if c.dbus_object_path == object_path:
1411
 
                        clients.remove(c)
1412
 
                        c.remove_from_connection()
1413
 
                        # Don't signal anything except ClientRemoved
1414
 
                        c.disable(signal=False)
1415
 
                        # Emit D-Bus signal
1416
 
                        self.ClientRemoved(object_path, c.name)
1417
 
                        return
1418
 
                raise KeyError
1419
 
            
1420
 
            del _interface
1421
 
        
1422
 
        mandos_dbus_service = MandosDBusService()
1423
 
    
1424
882
    for client in clients:
1425
 
        if use_dbus:
1426
 
            # Emit D-Bus signal
1427
 
            mandos_dbus_service.ClientAdded(client.dbus_object_path,
1428
 
                                            client.GetAllProperties())
1429
 
        client.enable()
 
883
        client.start()
1430
884
    
1431
885
    tcp_server.enable()
1432
886
    tcp_server.server_activate()
1433
887
    
1434
888
    # Find out what port we got
1435
889
    service.port = tcp_server.socket.getsockname()[1]
1436
 
    if use_ipv6:
1437
 
        logger.info(u"Now listening on address %r, port %d,"
1438
 
                    " flowinfo %d, scope_id %d"
1439
 
                    % tcp_server.socket.getsockname())
1440
 
    else:                       # IPv4
1441
 
        logger.info(u"Now listening on address %r, port %d"
1442
 
                    % tcp_server.socket.getsockname())
 
890
    logger.info(u"Now listening on address %r, port %d, flowinfo %d,"
 
891
                u" scope_id %d" % tcp_server.socket.getsockname())
1443
892
    
1444
893
    #service.interface = tcp_server.socket.getsockname()[3]
1445
894
    
1446
895
    try:
1447
896
        # From the Avahi example code
 
897
        server.connect_to_signal("StateChanged", server_state_changed)
1448
898
        try:
1449
 
            service.activate()
 
899
            server_state_changed(server.GetState())
1450
900
        except dbus.exceptions.DBusException, error:
1451
901
            logger.critical(u"DBusException: %s", error)
1452
902
            sys.exit(1)
1454
904
        
1455
905
        gobject.io_add_watch(tcp_server.fileno(), gobject.IO_IN,
1456
906
                             lambda *args, **kwargs:
1457
 
                             (tcp_server.handle_request
1458
 
                              (*args[2:], **kwargs) or True))
 
907
                             tcp_server.handle_request\
 
908
                             (*args[2:], **kwargs) or True)
1459
909
        
1460
910
        logger.debug(u"Starting main loop")
1461
911
        main_loop.run()
1462
912
    except AvahiError, error:
1463
 
        logger.critical(u"AvahiError: %s", error)
 
913
        logger.critical(u"AvahiError: %s" + unicode(error))
1464
914
        sys.exit(1)
1465
915
    except KeyboardInterrupt:
1466
916
        if debug:
1467
 
            print >> sys.stderr
1468
 
        logger.debug(u"Server received KeyboardInterrupt")
1469
 
    logger.debug(u"Server exiting")
 
917
            print
1470
918
 
1471
919
if __name__ == '__main__':
1472
920
    main()