/mandos/trunk

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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
 
        SO_BINDTODEVICE = None
78
 
 
79
 
 
80
 
version = "1.0.8"
81
 
 
82
 
logger = logging.Logger(u'mandos')
83
 
syslogger = (logging.handlers.SysLogHandler
84
 
             (facility = logging.handlers.SysLogHandler.LOG_DAEMON,
85
 
              address = "/dev/log"))
86
 
syslogger.setFormatter(logging.Formatter
87
 
                       (u'Mandos [%(process)d]: %(levelname)s:'
88
 
                        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'))
89
74
logger.addHandler(syslogger)
90
75
 
91
76
console = logging.StreamHandler()
92
 
console.setFormatter(logging.Formatter(u'%(name)s [%(process)d]:'
93
 
                                       u' %(levelname)s:'
94
 
                                       u' %(message)s'))
 
77
console.setFormatter(logging.Formatter('%(name)s: %(levelname)s:'
 
78
                                       ' %(message)s'))
95
79
logger.addHandler(console)
96
80
 
97
81
class AvahiError(Exception):
98
 
    def __init__(self, value, *args, **kwargs):
 
82
    def __init__(self, value):
99
83
        self.value = value
100
 
        super(AvahiError, self).__init__(value, *args, **kwargs)
101
 
    def __unicode__(self):
102
 
        return unicode(repr(self.value))
 
84
        super(AvahiError, self).__init__()
 
85
    def __str__(self):
 
86
        return repr(self.value)
103
87
 
104
88
class AvahiServiceError(AvahiError):
105
89
    pass
110
94
 
111
95
class AvahiService(object):
112
96
    """An Avahi (Zeroconf) service.
113
 
    
114
97
    Attributes:
115
98
    interface: integer; avahi.IF_UNSPEC or an interface index.
116
99
               Used to optionally bind to the specified interface.
117
 
    name: string; Example: u'Mandos'
118
 
    type: string; Example: u'_mandos._tcp'.
 
100
    name: string; Example: 'Mandos'
 
101
    type: string; Example: '_mandos._tcp'.
119
102
                  See <http://www.dns-sd.org/ServiceTypes.html>
120
103
    port: integer; what port to announce
121
104
    TXT: list of strings; TXT record for the service
124
107
    max_renames: integer; maximum number of renames
125
108
    rename_count: integer; counter so we only rename after collisions
126
109
                  a sensible number of times
127
 
    group: D-Bus Entry Group
128
 
    server: D-Bus Server
129
 
    bus: dbus.SystemBus()
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
 
        if getattr(self, u"enabled", False):
316
 
            # Already enabled
317
 
            return
318
 
        self.last_enabled = datetime.datetime.utcnow()
319
262
        # Schedule a new checker to be started an 'interval' from now,
320
263
        # and every interval from then on.
321
 
        self.checker_initiator_tag = (gobject.timeout_add
322
 
                                      (self.interval_milliseconds(),
323
 
                                       self.start_checker))
 
264
        self.checker_initiator_tag = gobject.timeout_add\
 
265
                                     (self._interval_milliseconds,
 
266
                                      self.start_checker)
324
267
        # Also start a new checker *right now*.
325
268
        self.start_checker()
326
 
        # Schedule a disable() when 'timeout' has passed
327
 
        self.disable_initiator_tag = (gobject.timeout_add
328
 
                                   (self.timeout_milliseconds(),
329
 
                                    self.disable))
330
 
        self.enabled = True
331
 
    
332
 
    def disable(self):
333
 
        """Disable this client."""
334
 
        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:
335
282
            return False
336
 
        logger.info(u"Disabling client %s", self.name)
337
 
        if getattr(self, u"disable_initiator_tag", False):
338
 
            gobject.source_remove(self.disable_initiator_tag)
339
 
            self.disable_initiator_tag = None
340
 
        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):
341
287
            gobject.source_remove(self.checker_initiator_tag)
342
288
            self.checker_initiator_tag = None
343
289
        self.stop_checker()
344
 
        if self.disable_hook:
345
 
            self.disable_hook(self)
346
 
        self.enabled = False
 
290
        if self.stop_hook:
 
291
            self.stop_hook(self)
347
292
        # Do not run this again if called by a gobject.timeout_add
348
293
        return False
349
 
    
350
294
    def __del__(self):
351
 
        self.disable_hook = None
352
 
        self.disable()
353
 
    
354
 
    def checker_callback(self, pid, condition, command):
 
295
        self.stop_hook = None
 
296
        self.stop()
 
297
    def checker_callback(self, pid, condition):
355
298
        """The checker has completed, so take appropriate actions."""
 
299
        now = datetime.datetime.now()
356
300
        self.checker_callback_tag = None
357
301
        self.checker = None
358
 
        if os.WIFEXITED(condition):
359
 
            exitstatus = os.WEXITSTATUS(condition)
360
 
            if exitstatus == 0:
361
 
                logger.info(u"Checker for %(name)s succeeded",
362
 
                            vars(self))
363
 
                self.checked_ok()
364
 
            else:
365
 
                logger.info(u"Checker for %(name)s failed",
366
 
                            vars(self))
367
 
        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):
368
312
            logger.warning(u"Checker for %(name)s crashed?",
369
313
                           vars(self))
370
 
    
371
 
    def checked_ok(self):
372
 
        """Bump up the timeout for this client.
373
 
        
374
 
        This should only be called when the client has been seen,
375
 
        alive and well.
376
 
        """
377
 
        self.last_checked_ok = datetime.datetime.utcnow()
378
 
        gobject.source_remove(self.disable_initiator_tag)
379
 
        self.disable_initiator_tag = (gobject.timeout_add
380
 
                                      (self.timeout_milliseconds(),
381
 
                                       self.disable))
382
 
    
 
314
        else:
 
315
            logger.info(u"Checker for %(name)s failed",
 
316
                        vars(self))
383
317
    def start_checker(self):
384
318
        """Start a new checker subprocess if one is not running.
385
 
        
386
319
        If a checker already exists, leave it running and do
387
320
        nothing."""
388
321
        # The reason for not killing a running checker is that if we
393
326
        # checkers alone, the checker would have to take more time
394
327
        # than 'timeout' for the client to be declared invalid, which
395
328
        # is as it should be.
396
 
        
397
 
        # If a checker exists, make sure it is not a zombie
398
 
        if self.checker is not None:
399
 
            pid, status = os.waitpid(self.checker.pid, os.WNOHANG)
400
 
            if pid:
401
 
                logger.warning(u"Checker was a zombie")
402
 
                gobject.source_remove(self.checker_callback_tag)
403
 
                self.checker_callback(pid, status,
404
 
                                      self.current_checker_command)
405
 
        # Start a new checker if needed
406
329
        if self.checker is None:
407
330
            try:
408
 
                # In case checker_command has exactly one % operator
409
 
                command = self.checker_command % self.host
 
331
                # In case check_command has exactly one % operator
 
332
                command = self.check_command % self.host
410
333
            except TypeError:
411
334
                # Escape attributes for the shell
412
 
                escaped_attrs = dict((key,
413
 
                                      re.escape(unicode(str(val),
414
 
                                                        errors=
415
 
                                                        u'replace')))
 
335
                escaped_attrs = dict((key, re.escape(str(val)))
416
336
                                     for key, val in
417
337
                                     vars(self).iteritems())
418
338
                try:
419
 
                    command = self.checker_command % escaped_attrs
 
339
                    command = self.check_command % escaped_attrs
420
340
                except TypeError, error:
421
341
                    logger.error(u'Could not format string "%s":'
422
 
                                 u' %s', self.checker_command, error)
 
342
                                 u' %s', self.check_command, error)
423
343
                    return True # Try again later
424
 
            self.current_checker_command = command
425
344
            try:
426
345
                logger.info(u"Starting checker %r for %s",
427
346
                            command, self.name)
431
350
                # always replaced by /dev/null.)
432
351
                self.checker = subprocess.Popen(command,
433
352
                                                close_fds=True,
434
 
                                                shell=True, cwd=u"/")
435
 
                self.checker_callback_tag = (gobject.child_watch_add
436
 
                                             (self.checker.pid,
437
 
                                              self.checker_callback,
438
 
                                              data=command))
439
 
                # The checker may have completed before the gobject
440
 
                # watch was added.  Check for this.
441
 
                pid, status = os.waitpid(self.checker.pid, os.WNOHANG)
442
 
                if pid:
443
 
                    gobject.source_remove(self.checker_callback_tag)
444
 
                    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)
445
357
            except OSError, error:
446
358
                logger.error(u"Failed to start subprocess: %s",
447
359
                             error)
448
360
        # Re-run this periodically if run by gobject.timeout_add
449
361
        return True
450
 
    
451
362
    def stop_checker(self):
452
363
        """Force the checker process, if any, to stop."""
453
364
        if self.checker_callback_tag:
454
365
            gobject.source_remove(self.checker_callback_tag)
455
366
            self.checker_callback_tag = None
456
 
        if getattr(self, u"checker", None) is None:
 
367
        if getattr(self, "checker", None) is None:
457
368
            return
458
369
        logger.debug(u"Stopping checker for %(name)s", vars(self))
459
370
        try:
465
376
            if error.errno != errno.ESRCH: # No such process
466
377
                raise
467
378
        self.checker = None
468
 
    
469
379
    def still_valid(self):
470
380
        """Has the timeout not yet passed for this client?"""
471
 
        if not getattr(self, u"enabled", False):
472
 
            return False
473
 
        now = datetime.datetime.utcnow()
 
381
        now = datetime.datetime.now()
474
382
        if self.last_checked_ok is None:
475
383
            return now < (self.created + self.timeout)
476
384
        else:
477
385
            return now < (self.last_checked_ok + self.timeout)
478
386
 
479
387
 
480
 
class ClientDBus(Client, dbus.service.Object):
481
 
    """A Client class using D-Bus
482
 
    
483
 
    Attributes:
484
 
    dbus_object_path: dbus.ObjectPath
485
 
    bus: dbus.SystemBus()
486
 
    """
487
 
    # dbus.service.Object doesn't use super(), so we can't either.
488
 
    
489
 
    def __init__(self, bus = None, *args, **kwargs):
490
 
        self.bus = bus
491
 
        Client.__init__(self, *args, **kwargs)
492
 
        # Only now, when this client is initialized, can it show up on
493
 
        # the D-Bus
494
 
        self.dbus_object_path = (dbus.ObjectPath
495
 
                                 (u"/clients/"
496
 
                                  + self.name.replace(u".", u"_")))
497
 
        dbus.service.Object.__init__(self, self.bus,
498
 
                                     self.dbus_object_path)
499
 
    
500
 
    @staticmethod
501
 
    def _datetime_to_dbus(dt, variant_level=0):
502
 
        """Convert a UTC datetime.datetime() to a D-Bus type."""
503
 
        return dbus.String(dt.isoformat(),
504
 
                           variant_level=variant_level)
505
 
    
506
 
    def enable(self):
507
 
        oldstate = getattr(self, u"enabled", False)
508
 
        r = Client.enable(self)
509
 
        if oldstate != self.enabled:
510
 
            # Emit D-Bus signals
511
 
            self.PropertyChanged(dbus.String(u"enabled"),
512
 
                                 dbus.Boolean(True, variant_level=1))
513
 
            self.PropertyChanged(
514
 
                dbus.String(u"last_enabled"),
515
 
                self._datetime_to_dbus(self.last_enabled,
516
 
                                       variant_level=1))
517
 
        return r
518
 
    
519
 
    def disable(self, signal = True):
520
 
        oldstate = getattr(self, u"enabled", False)
521
 
        r = Client.disable(self)
522
 
        if signal and oldstate != self.enabled:
523
 
            # Emit D-Bus signal
524
 
            self.PropertyChanged(dbus.String(u"enabled"),
525
 
                                 dbus.Boolean(False, variant_level=1))
526
 
        return r
527
 
    
528
 
    def __del__(self, *args, **kwargs):
529
 
        try:
530
 
            self.remove_from_connection()
531
 
        except LookupError:
532
 
            pass
533
 
        if hasattr(dbus.service.Object, u"__del__"):
534
 
            dbus.service.Object.__del__(self, *args, **kwargs)
535
 
        Client.__del__(self, *args, **kwargs)
536
 
    
537
 
    def checker_callback(self, pid, condition, command,
538
 
                         *args, **kwargs):
539
 
        self.checker_callback_tag = None
540
 
        self.checker = None
541
 
        # Emit D-Bus signal
542
 
        self.PropertyChanged(dbus.String(u"checker_running"),
543
 
                             dbus.Boolean(False, variant_level=1))
544
 
        if os.WIFEXITED(condition):
545
 
            exitstatus = os.WEXITSTATUS(condition)
546
 
            # Emit D-Bus signal
547
 
            self.CheckerCompleted(dbus.Int16(exitstatus),
548
 
                                  dbus.Int64(condition),
549
 
                                  dbus.String(command))
550
 
        else:
551
 
            # Emit D-Bus signal
552
 
            self.CheckerCompleted(dbus.Int16(-1),
553
 
                                  dbus.Int64(condition),
554
 
                                  dbus.String(command))
555
 
        
556
 
        return Client.checker_callback(self, pid, condition, command,
557
 
                                       *args, **kwargs)
558
 
    
559
 
    def checked_ok(self, *args, **kwargs):
560
 
        r = Client.checked_ok(self, *args, **kwargs)
561
 
        # Emit D-Bus signal
562
 
        self.PropertyChanged(
563
 
            dbus.String(u"last_checked_ok"),
564
 
            (self._datetime_to_dbus(self.last_checked_ok,
565
 
                                    variant_level=1)))
566
 
        return r
567
 
    
568
 
    def start_checker(self, *args, **kwargs):
569
 
        old_checker = self.checker
570
 
        if self.checker is not None:
571
 
            old_checker_pid = self.checker.pid
572
 
        else:
573
 
            old_checker_pid = None
574
 
        r = Client.start_checker(self, *args, **kwargs)
575
 
        # Only if new checker process was started
576
 
        if (self.checker is not None
577
 
            and old_checker_pid != self.checker.pid):
578
 
            # Emit D-Bus signal
579
 
            self.CheckerStarted(self.current_checker_command)
580
 
            self.PropertyChanged(
581
 
                dbus.String(u"checker_running"),
582
 
                dbus.Boolean(True, variant_level=1))
583
 
        return r
584
 
    
585
 
    def stop_checker(self, *args, **kwargs):
586
 
        old_checker = getattr(self, u"checker", None)
587
 
        r = Client.stop_checker(self, *args, **kwargs)
588
 
        if (old_checker is not None
589
 
            and getattr(self, u"checker", None) is None):
590
 
            self.PropertyChanged(dbus.String(u"checker_running"),
591
 
                                 dbus.Boolean(False, variant_level=1))
592
 
        return r
593
 
    
594
 
    ## D-Bus methods & signals
595
 
    _interface = u"se.bsnet.fukt.Mandos.Client"
596
 
    
597
 
    # CheckedOK - method
598
 
    @dbus.service.method(_interface)
599
 
    def CheckedOK(self):
600
 
        return self.checked_ok()
601
 
    
602
 
    # CheckerCompleted - signal
603
 
    @dbus.service.signal(_interface, signature=u"nxs")
604
 
    def CheckerCompleted(self, exitcode, waitstatus, command):
605
 
        "D-Bus signal"
606
 
        pass
607
 
    
608
 
    # CheckerStarted - signal
609
 
    @dbus.service.signal(_interface, signature=u"s")
610
 
    def CheckerStarted(self, command):
611
 
        "D-Bus signal"
612
 
        pass
613
 
    
614
 
    # GetAllProperties - method
615
 
    @dbus.service.method(_interface, out_signature=u"a{sv}")
616
 
    def GetAllProperties(self):
617
 
        "D-Bus method"
618
 
        return dbus.Dictionary({
619
 
                dbus.String(u"name"):
620
 
                    dbus.String(self.name, variant_level=1),
621
 
                dbus.String(u"fingerprint"):
622
 
                    dbus.String(self.fingerprint, variant_level=1),
623
 
                dbus.String(u"host"):
624
 
                    dbus.String(self.host, variant_level=1),
625
 
                dbus.String(u"created"):
626
 
                    self._datetime_to_dbus(self.created,
627
 
                                           variant_level=1),
628
 
                dbus.String(u"last_enabled"):
629
 
                    (self._datetime_to_dbus(self.last_enabled,
630
 
                                            variant_level=1)
631
 
                     if self.last_enabled is not None
632
 
                     else dbus.Boolean(False, variant_level=1)),
633
 
                dbus.String(u"enabled"):
634
 
                    dbus.Boolean(self.enabled, variant_level=1),
635
 
                dbus.String(u"last_checked_ok"):
636
 
                    (self._datetime_to_dbus(self.last_checked_ok,
637
 
                                            variant_level=1)
638
 
                     if self.last_checked_ok is not None
639
 
                     else dbus.Boolean (False, variant_level=1)),
640
 
                dbus.String(u"timeout"):
641
 
                    dbus.UInt64(self.timeout_milliseconds(),
642
 
                                variant_level=1),
643
 
                dbus.String(u"interval"):
644
 
                    dbus.UInt64(self.interval_milliseconds(),
645
 
                                variant_level=1),
646
 
                dbus.String(u"checker"):
647
 
                    dbus.String(self.checker_command,
648
 
                                variant_level=1),
649
 
                dbus.String(u"checker_running"):
650
 
                    dbus.Boolean(self.checker is not None,
651
 
                                 variant_level=1),
652
 
                dbus.String(u"object_path"):
653
 
                    dbus.ObjectPath(self.dbus_object_path,
654
 
                                    variant_level=1)
655
 
                }, signature=u"sv")
656
 
    
657
 
    # IsStillValid - method
658
 
    @dbus.service.method(_interface, out_signature=u"b")
659
 
    def IsStillValid(self):
660
 
        return self.still_valid()
661
 
    
662
 
    # PropertyChanged - signal
663
 
    @dbus.service.signal(_interface, signature=u"sv")
664
 
    def PropertyChanged(self, property, value):
665
 
        "D-Bus signal"
666
 
        pass
667
 
    
668
 
    # ReceivedSecret - signal
669
 
    @dbus.service.signal(_interface)
670
 
    def ReceivedSecret(self):
671
 
        "D-Bus signal"
672
 
        pass
673
 
    
674
 
    # Rejected - signal
675
 
    @dbus.service.signal(_interface)
676
 
    def Rejected(self):
677
 
        "D-Bus signal"
678
 
        pass
679
 
    
680
 
    # SetChecker - method
681
 
    @dbus.service.method(_interface, in_signature=u"s")
682
 
    def SetChecker(self, checker):
683
 
        "D-Bus setter method"
684
 
        self.checker_command = checker
685
 
        # Emit D-Bus signal
686
 
        self.PropertyChanged(dbus.String(u"checker"),
687
 
                             dbus.String(self.checker_command,
688
 
                                         variant_level=1))
689
 
    
690
 
    # SetHost - method
691
 
    @dbus.service.method(_interface, in_signature=u"s")
692
 
    def SetHost(self, host):
693
 
        "D-Bus setter method"
694
 
        self.host = host
695
 
        # Emit D-Bus signal
696
 
        self.PropertyChanged(dbus.String(u"host"),
697
 
                             dbus.String(self.host, variant_level=1))
698
 
    
699
 
    # SetInterval - method
700
 
    @dbus.service.method(_interface, in_signature=u"t")
701
 
    def SetInterval(self, milliseconds):
702
 
        self.interval = datetime.timedelta(0, 0, 0, milliseconds)
703
 
        # Emit D-Bus signal
704
 
        self.PropertyChanged(dbus.String(u"interval"),
705
 
                             (dbus.UInt64(self.interval_milliseconds(),
706
 
                                          variant_level=1)))
707
 
    
708
 
    # SetSecret - method
709
 
    @dbus.service.method(_interface, in_signature=u"ay",
710
 
                         byte_arrays=True)
711
 
    def SetSecret(self, secret):
712
 
        "D-Bus setter method"
713
 
        self.secret = str(secret)
714
 
    
715
 
    # SetTimeout - method
716
 
    @dbus.service.method(_interface, in_signature=u"t")
717
 
    def SetTimeout(self, milliseconds):
718
 
        self.timeout = datetime.timedelta(0, 0, 0, milliseconds)
719
 
        # Emit D-Bus signal
720
 
        self.PropertyChanged(dbus.String(u"timeout"),
721
 
                             (dbus.UInt64(self.timeout_milliseconds(),
722
 
                                          variant_level=1)))
723
 
    
724
 
    # Enable - method
725
 
    @dbus.service.method(_interface)
726
 
    def Enable(self):
727
 
        "D-Bus method"
728
 
        self.enable()
729
 
    
730
 
    # StartChecker - method
731
 
    @dbus.service.method(_interface)
732
 
    def StartChecker(self):
733
 
        "D-Bus method"
734
 
        self.start_checker()
735
 
    
736
 
    # Disable - method
737
 
    @dbus.service.method(_interface)
738
 
    def Disable(self):
739
 
        "D-Bus method"
740
 
        self.disable()
741
 
    
742
 
    # StopChecker - method
743
 
    @dbus.service.method(_interface)
744
 
    def StopChecker(self):
745
 
        self.stop_checker()
746
 
    
747
 
    del _interface
748
 
 
749
 
 
750
 
class ClientHandler(socketserver.BaseRequestHandler, object):
751
 
    """A class to handle client connections.
752
 
    
753
 
    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.
754
445
    Note: This will run in its own forked process."""
755
446
    
756
447
    def handle(self):
757
448
        logger.info(u"TCP connection from: %s",
758
 
                    unicode(self.client_address))
759
 
        logger.debug(u"IPC Pipe FD: %d", self.server.pipe[1])
760
 
        # Open IPC pipe to parent process
761
 
        with closing(os.fdopen(self.server.pipe[1], u"w", 1)) as ipc:
762
 
            session = (gnutls.connection
763
 
                       .ClientSession(self.request,
764
 
                                      gnutls.connection
765
 
                                      .X509Credentials()))
766
 
            
767
 
            line = self.request.makefile().readline()
768
 
            logger.debug(u"Protocol version: %r", line)
769
 
            try:
770
 
                if int(line.strip().split()[0]) > 1:
771
 
                    raise RuntimeError
772
 
            except (ValueError, IndexError, RuntimeError), error:
773
 
                logger.error(u"Unknown protocol version: %s", error)
774
 
                return
775
 
            
776
 
            # Note: gnutls.connection.X509Credentials is really a
777
 
            # generic GnuTLS certificate credentials object so long as
778
 
            # no X.509 keys are added to it.  Therefore, we can use it
779
 
            # here despite using OpenPGP certificates.
780
 
            
781
 
            #priority = u':'.join((u"NONE", u"+VERS-TLS1.1",
782
 
            #                      u"+AES-256-CBC", u"+SHA1",
783
 
            #                      u"+COMP-NULL", u"+CTYPE-OPENPGP",
784
 
            #                      u"+DHE-DSS"))
785
 
            # Use a fallback default, since this MUST be set.
786
 
            priority = self.server.gnutls_priority
787
 
            if priority is None:
788
 
                priority = u"NORMAL"
789
 
            (gnutls.library.functions
790
 
             .gnutls_priority_set_direct(session._c_object,
791
 
                                         priority, None))
792
 
            
793
 
            try:
794
 
                session.handshake()
795
 
            except gnutls.errors.GNUTLSError, error:
796
 
                logger.warning(u"Handshake failed: %s", error)
797
 
                # Do not run session.bye() here: the session is not
798
 
                # established.  Just abandon the request.
799
 
                return
800
 
            logger.debug(u"Handshake succeeded")
801
 
            try:
802
 
                fpr = self.fingerprint(self.peer_certificate(session))
803
 
            except (TypeError, gnutls.errors.GNUTLSError), error:
804
 
                logger.warning(u"Bad certificate: %s", error)
805
 
                session.bye()
806
 
                return
807
 
            logger.debug(u"Fingerprint: %s", fpr)
808
 
            
809
 
            for c in self.server.clients:
810
 
                if c.fingerprint == fpr:
811
 
                    client = c
812
 
                    break
813
 
            else:
814
 
                ipc.write(u"NOTFOUND %s\n" % fpr)
815
 
                session.bye()
816
 
                return
817
 
            # Have to check if client.still_valid(), since it is
818
 
            # possible that the client timed out while establishing
819
 
            # the GnuTLS session.
820
 
            if not client.still_valid():
821
 
                ipc.write(u"INVALID %s\n" % client.name)
822
 
                session.bye()
823
 
                return
824
 
            ipc.write(u"SENDING %s\n" % client.name)
825
 
            sent_size = 0
826
 
            while sent_size < len(client.secret):
827
 
                sent = session.send(client.secret[sent_size:])
828
 
                logger.debug(u"Sent: %d, remaining: %d",
829
 
                             sent, len(client.secret)
830
 
                             - (sent_size + sent))
831
 
                sent_size += sent
832
 
            session.bye()
833
 
    
834
 
    @staticmethod
835
 
    def peer_certificate(session):
836
 
        "Return the peer's OpenPGP certificate as a bytestring"
837
 
        # If not an OpenPGP certificate...
838
 
        if (gnutls.library.functions
839
 
            .gnutls_certificate_type_get(session._c_object)
840
 
            != gnutls.library.constants.GNUTLS_CRT_OPENPGP):
841
 
            # ...do the normal thing
842
 
            return session.peer_certificate
843
 
        list_size = ctypes.c_uint(1)
844
 
        cert_list = (gnutls.library.functions
845
 
                     .gnutls_certificate_get_peers
846
 
                     (session._c_object, ctypes.byref(list_size)))
847
 
        if not bool(cert_list) and list_size.value != 0:
848
 
            raise gnutls.errors.GNUTLSError(u"error getting peer"
849
 
                                            u" certificate")
850
 
        if list_size.value == 0:
851
 
            return None
852
 
        cert = cert_list[0]
853
 
        return ctypes.string_at(cert.data, cert.size)
854
 
    
855
 
    @staticmethod
856
 
    def fingerprint(openpgp):
857
 
        "Convert an OpenPGP bytestring to a hexdigit fingerprint"
858
 
        # New GnuTLS "datum" with the OpenPGP public key
859
 
        datum = (gnutls.library.types
860
 
                 .gnutls_datum_t(ctypes.cast(ctypes.c_char_p(openpgp),
861
 
                                             ctypes.POINTER
862
 
                                             (ctypes.c_ubyte)),
863
 
                                 ctypes.c_uint(len(openpgp))))
864
 
        # New empty GnuTLS certificate
865
 
        crt = gnutls.library.types.gnutls_openpgp_crt_t()
866
 
        (gnutls.library.functions
867
 
         .gnutls_openpgp_crt_init(ctypes.byref(crt)))
868
 
        # Import the OpenPGP public key into the certificate
869
 
        (gnutls.library.functions
870
 
         .gnutls_openpgp_crt_import(crt, ctypes.byref(datum),
871
 
                                    gnutls.library.constants
872
 
                                    .GNUTLS_OPENPGP_FMT_RAW))
873
 
        # Verify the self signature in the key
874
 
        crtverify = ctypes.c_uint()
875
 
        (gnutls.library.functions
876
 
         .gnutls_openpgp_crt_verify_self(crt, 0,
877
 
                                         ctypes.byref(crtverify)))
878
 
        if crtverify.value != 0:
879
 
            gnutls.library.functions.gnutls_openpgp_crt_deinit(crt)
880
 
            raise (gnutls.errors.CertificateSecurityError
881
 
                   (u"Verify failed"))
882
 
        # New buffer for the fingerprint
883
 
        buf = ctypes.create_string_buffer(20)
884
 
        buf_len = ctypes.c_size_t()
885
 
        # Get the fingerprint from the certificate into the buffer
886
 
        (gnutls.library.functions
887
 
         .gnutls_openpgp_crt_get_fingerprint(crt, ctypes.byref(buf),
888
 
                                             ctypes.byref(buf_len)))
889
 
        # Deinit the certificate
890
 
        gnutls.library.functions.gnutls_openpgp_crt_deinit(crt)
891
 
        # Convert the buffer to a Python bytestring
892
 
        fpr = ctypes.string_at(buf, buf_len.value)
893
 
        # Convert the bytestring to hexadecimal notation
894
 
        hex_fpr = u''.join(u"%02X" % ord(char) for char in fpr)
895
 
        return hex_fpr
896
 
 
897
 
 
898
 
class ForkingMixInWithPipe(socketserver.ForkingMixIn, object):
899
 
    """Like socketserver.ForkingMixIn, but also pass a pipe."""
900
 
    def process_request(self, request, client_address):
901
 
        """Overrides and wraps the original process_request().
902
 
        
903
 
        This function creates a new pipe in self.pipe 
904
 
        """
905
 
        self.pipe = os.pipe()
906
 
        super(ForkingMixInWithPipe,
907
 
              self).process_request(request, client_address)
908
 
        os.close(self.pipe[1])  # close write end
909
 
        self.add_pipe(self.pipe[0])
910
 
    def add_pipe(self, pipe):
911
 
        """Dummy function; override as necessary"""
912
 
        os.close(pipe)
913
 
 
914
 
 
915
 
class IPv6_TCPServer(ForkingMixInWithPipe,
916
 
                     socketserver.TCPServer, object):
917
 
    """IPv6-capable TCP server.  Accepts 'None' as address and/or port
918
 
    
 
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.
919
521
    Attributes:
 
522
        settings:       Server settings
 
523
        clients:        Set() of Client objects
920
524
        enabled:        Boolean; whether this server is activated yet
921
 
        interface:      None or a network interface name (string)
922
 
        use_ipv6:       Boolean; to use IPv6 or not
923
525
    """
924
 
    def __init__(self, server_address, RequestHandlerClass,
925
 
                 interface=None, use_ipv6=True):
926
 
        self.interface = interface
927
 
        if use_ipv6:
928
 
            self.address_family = socket.AF_INET6
929
 
        socketserver.TCPServer.__init__(self, server_address,
930
 
                                        RequestHandlerClass)
 
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"]
 
534
        self.enabled = False
 
535
        super(IPv6_TCPServer, self).__init__(*args, **kwargs)
931
536
    def server_bind(self):
932
537
        """This overrides the normal server_bind() function
933
538
        to bind to an interface if one was specified, and also NOT to
934
539
        bind to an address or port if they were not specified."""
935
 
        if self.interface is not None:
936
 
            if SO_BINDTODEVICE is None:
937
 
                logger.error(u"SO_BINDTODEVICE does not exist;"
938
 
                             u" cannot bind to interface %s",
939
 
                             self.interface)
940
 
            else:
941
 
                try:
942
 
                    self.socket.setsockopt(socket.SOL_SOCKET,
943
 
                                           SO_BINDTODEVICE,
944
 
                                           str(self.interface
945
 
                                               + u'\0'))
946
 
                except socket.error, error:
947
 
                    if error[0] == errno.EPERM:
948
 
                        logger.error(u"No permission to"
949
 
                                     u" bind to interface %s",
950
 
                                     self.interface)
951
 
                    elif error[0] == errno.ENOPROTOOPT:
952
 
                        logger.error(u"SO_BINDTODEVICE not available;"
953
 
                                     u" cannot bind to interface %s",
954
 
                                     self.interface)
955
 
                    else:
956
 
                        raise
 
540
        if self.settings["interface"]:
 
541
            # 25 is from /usr/include/asm-i486/socket.h
 
542
            SO_BINDTODEVICE = getattr(socket, "SO_BINDTODEVICE", 25)
 
543
            try:
 
544
                self.socket.setsockopt(socket.SOL_SOCKET,
 
545
                                       SO_BINDTODEVICE,
 
546
                                       self.settings["interface"])
 
547
            except socket.error, error:
 
548
                if error[0] == errno.EPERM:
 
549
                    logger.error(u"No permission to"
 
550
                                 u" bind to interface %s",
 
551
                                 self.settings["interface"])
 
552
                else:
 
553
                    raise error
957
554
        # Only bind(2) the socket if we really need to.
958
555
        if self.server_address[0] or self.server_address[1]:
959
556
            if not self.server_address[0]:
960
 
                if self.address_family == socket.AF_INET6:
961
 
                    any_address = u"::" # in6addr_any
962
 
                else:
963
 
                    any_address = socket.INADDR_ANY
964
 
                self.server_address = (any_address,
 
557
                in6addr_any = "::"
 
558
                self.server_address = (in6addr_any,
965
559
                                       self.server_address[1])
966
560
            elif not self.server_address[1]:
967
561
                self.server_address = (self.server_address[0],
968
562
                                       0)
969
 
#                 if self.interface:
 
563
#                 if self.settings["interface"]:
970
564
#                     self.server_address = (self.server_address[0],
971
565
#                                            0, # port
972
566
#                                            0, # flowinfo
973
567
#                                            if_nametoindex
974
 
#                                            (self.interface))
975
 
            return socketserver.TCPServer.server_bind(self)
976
 
 
977
 
 
978
 
class MandosServer(IPv6_TCPServer):
979
 
    """Mandos server.
980
 
    
981
 
    Attributes:
982
 
        clients:        set of Client objects
983
 
        gnutls_priority GnuTLS priority string
984
 
        use_dbus:       Boolean; to emit D-Bus signals or not
985
 
        clients:        set of Client objects
986
 
        gnutls_priority GnuTLS priority string
987
 
        use_dbus:       Boolean; to emit D-Bus signals or not
988
 
    
989
 
    Assumes a gobject.MainLoop event loop.
990
 
    """
991
 
    def __init__(self, server_address, RequestHandlerClass,
992
 
                 interface=None, use_ipv6=True, clients=None,
993
 
                 gnutls_priority=None, use_dbus=True):
994
 
        self.enabled = False
995
 
        self.clients = clients
996
 
        if self.clients is None:
997
 
            self.clients = set()
998
 
        self.use_dbus = use_dbus
999
 
        self.gnutls_priority = gnutls_priority
1000
 
        IPv6_TCPServer.__init__(self, server_address,
1001
 
                                RequestHandlerClass,
1002
 
                                interface = interface,
1003
 
                                use_ipv6 = use_ipv6)
 
568
#                                            (self.settings
 
569
#                                             ["interface"]))
 
570
            return super(IPv6_TCPServer, self).server_bind()
1004
571
    def server_activate(self):
1005
572
        if self.enabled:
1006
 
            return socketserver.TCPServer.server_activate(self)
 
573
            return super(IPv6_TCPServer, self).server_activate()
1007
574
    def enable(self):
1008
575
        self.enabled = True
1009
 
    def add_pipe(self, pipe):
1010
 
        # Call "handle_ipc" for both data and EOF events
1011
 
        gobject.io_add_watch(pipe, gobject.IO_IN | gobject.IO_HUP,
1012
 
                             self.handle_ipc)
1013
 
    def handle_ipc(self, source, condition, file_objects={}):
1014
 
        condition_names = {
1015
 
            gobject.IO_IN: u"IN",   # There is data to read.
1016
 
            gobject.IO_OUT: u"OUT", # Data can be written (without
1017
 
                                    # blocking).
1018
 
            gobject.IO_PRI: u"PRI", # There is urgent data to read.
1019
 
            gobject.IO_ERR: u"ERR", # Error condition.
1020
 
            gobject.IO_HUP: u"HUP"  # Hung up (the connection has been
1021
 
                                    # broken, usually for pipes and
1022
 
                                    # sockets).
1023
 
            }
1024
 
        conditions_string = ' | '.join(name
1025
 
                                       for cond, name in
1026
 
                                       condition_names.iteritems()
1027
 
                                       if cond & condition)
1028
 
        logger.debug(u"Handling IPC: FD = %d, condition = %s", source,
1029
 
                     conditions_string)
1030
 
        
1031
 
        # Turn the pipe file descriptor into a Python file object
1032
 
        if source not in file_objects:
1033
 
            file_objects[source] = os.fdopen(source, u"r", 1)
1034
 
        
1035
 
        # Read a line from the file object
1036
 
        cmdline = file_objects[source].readline()
1037
 
        if not cmdline:             # Empty line means end of file
1038
 
            # close the IPC pipe
1039
 
            file_objects[source].close()
1040
 
            del file_objects[source]
1041
 
            
1042
 
            # Stop calling this function
1043
 
            return False
1044
 
        
1045
 
        logger.debug(u"IPC command: %r", cmdline)
1046
 
        
1047
 
        # Parse and act on command
1048
 
        cmd, args = cmdline.rstrip(u"\r\n").split(None, 1)
1049
 
        
1050
 
        if cmd == u"NOTFOUND":
1051
 
            logger.warning(u"Client not found for fingerprint: %s",
1052
 
                           args)
1053
 
            if self.use_dbus:
1054
 
                # Emit D-Bus signal
1055
 
                mandos_dbus_service.ClientNotFound(args)
1056
 
        elif cmd == u"INVALID":
1057
 
            for client in self.clients:
1058
 
                if client.name == args:
1059
 
                    logger.warning(u"Client %s is invalid", args)
1060
 
                    if self.use_dbus:
1061
 
                        # Emit D-Bus signal
1062
 
                        client.Rejected()
1063
 
                    break
1064
 
            else:
1065
 
                logger.error(u"Unknown client %s is invalid", args)
1066
 
        elif cmd == u"SENDING":
1067
 
            for client in self.clients:
1068
 
                if client.name == args:
1069
 
                    logger.info(u"Sending secret to %s", client.name)
1070
 
                    client.checked_ok()
1071
 
                    if self.use_dbus:
1072
 
                        # Emit D-Bus signal
1073
 
                        client.ReceivedSecret()
1074
 
                    break
1075
 
            else:
1076
 
                logger.error(u"Sending secret to unknown client %s",
1077
 
                             args)
1078
 
        else:
1079
 
            logger.error(u"Unknown IPC command: %r", cmdline)
1080
 
        
1081
 
        # Keep calling this function
1082
 
        return True
1083
576
 
1084
577
 
1085
578
def string_to_delta(interval):
1086
579
    """Parse a string and return a datetime.timedelta
1087
 
    
1088
 
    >>> string_to_delta(u'7d')
 
580
 
 
581
    >>> string_to_delta('7d')
1089
582
    datetime.timedelta(7)
1090
 
    >>> string_to_delta(u'60s')
 
583
    >>> string_to_delta('60s')
1091
584
    datetime.timedelta(0, 60)
1092
 
    >>> string_to_delta(u'60m')
 
585
    >>> string_to_delta('60m')
1093
586
    datetime.timedelta(0, 3600)
1094
 
    >>> string_to_delta(u'24h')
 
587
    >>> string_to_delta('24h')
1095
588
    datetime.timedelta(1)
1096
589
    >>> string_to_delta(u'1w')
1097
590
    datetime.timedelta(7)
1098
 
    >>> string_to_delta(u'5m 30s')
 
591
    >>> string_to_delta('5m 30s')
1099
592
    datetime.timedelta(0, 330)
1100
593
    """
1101
594
    timevalue = datetime.timedelta(0)
1121
614
    return timevalue
1122
615
 
1123
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
 
1124
640
def if_nametoindex(interface):
1125
 
    """Call the C function if_nametoindex(), or equivalent
1126
 
    
1127
 
    Note: This function cannot accept a unicode string."""
 
641
    """Call the C function if_nametoindex(), or equivalent"""
1128
642
    global if_nametoindex
1129
643
    try:
1130
 
        if_nametoindex = (ctypes.cdll.LoadLibrary
1131
 
                          (ctypes.util.find_library(u"c"))
1132
 
                          .if_nametoindex)
 
644
        if_nametoindex = ctypes.cdll.LoadLibrary\
 
645
            (ctypes.util.find_library("c")).if_nametoindex
1133
646
    except (OSError, AttributeError):
1134
 
        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
1135
651
        def if_nametoindex(interface):
1136
652
            "Get an interface index the hard way, i.e. using fcntl()"
1137
653
            SIOCGIFINDEX = 0x8933  # From /usr/include/linux/sockios.h
1138
 
            with closing(socket.socket()) as s:
1139
 
                ifreq = fcntl.ioctl(s, SIOCGIFINDEX,
1140
 
                                    struct.pack(str(u"16s16x"),
1141
 
                                                interface))
1142
 
            interface_index = struct.unpack(str(u"I"),
1143
 
                                            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]
1144
659
            return interface_index
1145
660
    return if_nametoindex(interface)
1146
661
 
1147
662
 
1148
663
def daemon(nochdir = False, noclose = False):
1149
664
    """See daemon(3).  Standard BSD Unix function.
1150
 
    
1151
665
    This should really exist as os.daemon, but it doesn't (yet)."""
1152
666
    if os.fork():
1153
667
        sys.exit()
1154
668
    os.setsid()
1155
669
    if not nochdir:
1156
 
        os.chdir(u"/")
 
670
        os.chdir("/")
1157
671
    if os.fork():
1158
672
        sys.exit()
1159
673
    if not noclose:
1161
675
        null = os.open(os.path.devnull, os.O_NOCTTY | os.O_RDWR)
1162
676
        if not stat.S_ISCHR(os.fstat(null).st_mode):
1163
677
            raise OSError(errno.ENODEV,
1164
 
                          u"/dev/null not a character device")
 
678
                          "/dev/null not a character device")
1165
679
        os.dup2(null, sys.stdin.fileno())
1166
680
        os.dup2(null, sys.stdout.fileno())
1167
681
        os.dup2(null, sys.stderr.fileno())
1170
684
 
1171
685
 
1172
686
def main():
1173
 
    
1174
 
    ######################################################################
1175
 
    # Parsing of options, both command line and config file
1176
 
    
1177
 
    parser = optparse.OptionParser(version = "%%prog %s" % version)
1178
 
    parser.add_option("-i", u"--interface", type=u"string",
1179
 
                      metavar="IF", help=u"Bind to interface IF")
1180
 
    parser.add_option("-a", u"--address", type=u"string",
1181
 
                      help=u"Address to listen for requests on")
1182
 
    parser.add_option("-p", u"--port", type=u"int",
1183
 
                      help=u"Port number to receive requests on")
1184
 
    parser.add_option("--check", action=u"store_true",
1185
 
                      help=u"Run self-test")
1186
 
    parser.add_option("--debug", action=u"store_true",
1187
 
                      help=u"Debug mode; run in foreground and log to"
1188
 
                      u" terminal")
1189
 
    parser.add_option("--priority", type=u"string", help=u"GnuTLS"
1190
 
                      u" priority string (see GnuTLS documentation)")
1191
 
    parser.add_option("--servicename", type=u"string",
1192
 
                      metavar=u"NAME", help=u"Zeroconf service name")
1193
 
    parser.add_option("--configdir", type=u"string",
1194
 
                      default=u"/etc/mandos", metavar=u"DIR",
1195
 
                      help=u"Directory to search for configuration"
1196
 
                      u" files")
1197
 
    parser.add_option("--no-dbus", action=u"store_false",
1198
 
                      dest=u"use_dbus", help=u"Do not provide D-Bus"
1199
 
                      u" system bus interface")
1200
 
    parser.add_option("--no-ipv6", action=u"store_false",
1201
 
                      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")
1202
707
    options = parser.parse_args()[0]
1203
708
    
1204
709
    if options.check:
1207
712
        sys.exit()
1208
713
    
1209
714
    # Default values for config file for server-global settings
1210
 
    server_defaults = { u"interface": u"",
1211
 
                        u"address": u"",
1212
 
                        u"port": u"",
1213
 
                        u"debug": u"False",
1214
 
                        u"priority":
1215
 
                        u"SECURE256:!CTYPE-X.509:+CTYPE-OPENPGP",
1216
 
                        u"servicename": u"Mandos",
1217
 
                        u"use_dbus": u"True",
1218
 
                        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",
1219
722
                        }
1220
723
    
1221
724
    # Parse config file for server-global settings
1222
 
    server_config = configparser.SafeConfigParser(server_defaults)
 
725
    server_config = ConfigParser.SafeConfigParser(server_defaults)
1223
726
    del server_defaults
1224
 
    server_config.read(os.path.join(options.configdir,
1225
 
                                    u"mandos.conf"))
 
727
    server_config.read(os.path.join(options.configdir, "mandos.conf"))
1226
728
    # Convert the SafeConfigParser object to a dict
1227
729
    server_settings = server_config.defaults()
1228
 
    # Use the appropriate methods on the non-string config options
1229
 
    for option in (u"debug", u"use_dbus", u"use_ipv6"):
1230
 
        server_settings[option] = server_config.getboolean(u"DEFAULT",
1231
 
                                                           option)
1232
 
    if server_settings["port"]:
1233
 
        server_settings["port"] = server_config.getint(u"DEFAULT",
1234
 
                                                       u"port")
 
730
    # Use getboolean on the boolean config option
 
731
    server_settings["debug"] = server_config.getboolean\
 
732
                               ("DEFAULT", "debug")
1235
733
    del server_config
1236
734
    
1237
735
    # Override the settings from the config file with command line
1238
736
    # options, if set.
1239
 
    for option in (u"interface", u"address", u"port", u"debug",
1240
 
                   u"priority", u"servicename", u"configdir",
1241
 
                   u"use_dbus", u"use_ipv6"):
 
737
    for option in ("interface", "address", "port", "debug",
 
738
                   "priority", "servicename", "configdir"):
1242
739
        value = getattr(options, option)
1243
740
        if value is not None:
1244
741
            server_settings[option] = value
1245
742
    del options
1246
 
    # Force all strings to be unicode
1247
 
    for option in server_settings.keys():
1248
 
        if type(server_settings[option]) is str:
1249
 
            server_settings[option] = unicode(server_settings[option])
1250
743
    # Now we have our good server settings in "server_settings"
1251
744
    
1252
 
    ##################################################################
1253
 
    
1254
 
    # For convenience
1255
 
    debug = server_settings[u"debug"]
1256
 
    use_dbus = server_settings[u"use_dbus"]
1257
 
    use_ipv6 = server_settings[u"use_ipv6"]
 
745
    debug = server_settings["debug"]
1258
746
    
1259
747
    if not debug:
1260
748
        syslogger.setLevel(logging.WARNING)
1261
749
        console.setLevel(logging.WARNING)
1262
750
    
1263
 
    if server_settings[u"servicename"] != u"Mandos":
1264
 
        syslogger.setFormatter(logging.Formatter
1265
 
                               (u'Mandos (%s) [%%(process)d]:'
1266
 
                                u' %%(levelname)s: %%(message)s'
1267
 
                                % 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"]))
1268
756
    
1269
757
    # Parse config file with clients
1270
 
    client_defaults = { u"timeout": u"1h",
1271
 
                        u"interval": u"5m",
1272
 
                        u"checker": u"fping -q -- %%(host)s",
1273
 
                        u"host": u"",
 
758
    client_defaults = { "timeout": "1h",
 
759
                        "interval": "5m",
 
760
                        "checker": "fping -q -- %(host)s",
 
761
                        "host": "",
1274
762
                        }
1275
 
    client_config = configparser.SafeConfigParser(client_defaults)
1276
 
    client_config.read(os.path.join(server_settings[u"configdir"],
1277
 
                                    u"clients.conf"))
1278
 
    
1279
 
    global mandos_dbus_service
1280
 
    mandos_dbus_service = None
1281
 
    
1282
 
    tcp_server = MandosServer((server_settings[u"address"],
1283
 
                               server_settings[u"port"]),
1284
 
                              ClientHandler,
1285
 
                              interface=server_settings[u"interface"],
1286
 
                              use_ipv6=use_ipv6,
1287
 
                              gnutls_priority=
1288
 
                              server_settings[u"priority"],
1289
 
                              use_dbus=use_dbus)
1290
 
    pidfilename = u"/var/run/mandos.pid"
1291
 
    try:
1292
 
        pidfile = open(pidfilename, u"w")
1293
 
    except IOError:
1294
 
        logger.error(u"Could not open file %r", pidfilename)
1295
 
    
1296
 
    try:
1297
 
        uid = pwd.getpwnam(u"_mandos").pw_uid
1298
 
        gid = pwd.getpwnam(u"_mandos").pw_gid
1299
 
    except KeyError:
1300
 
        try:
1301
 
            uid = pwd.getpwnam(u"mandos").pw_uid
1302
 
            gid = pwd.getpwnam(u"mandos").pw_gid
1303
 
        except KeyError:
1304
 
            try:
1305
 
                uid = pwd.getpwnam(u"nobody").pw_uid
1306
 
                gid = pwd.getpwnam(u"nobody").pw_gid
1307
 
            except KeyError:
1308
 
                uid = 65534
1309
 
                gid = 65534
1310
 
    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)
1311
797
        os.setgid(gid)
1312
 
        os.setuid(uid)
1313
798
    except OSError, error:
1314
799
        if error[0] != errno.EPERM:
1315
800
            raise error
1316
801
    
1317
 
    # Enable all possible GnuTLS debugging
1318
 
    if debug:
1319
 
        # "Use a log level over 10 to enable all debugging options."
1320
 
        # - GnuTLS manual
1321
 
        gnutls.library.functions.gnutls_global_set_log_level(11)
1322
 
        
1323
 
        @gnutls.library.types.gnutls_log_func
1324
 
        def debug_gnutls(level, string):
1325
 
            logger.debug(u"GnuTLS: %s", string[:-1])
1326
 
        
1327
 
        (gnutls.library.functions
1328
 
         .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"])
1329
808
    
1330
809
    global main_loop
 
810
    global bus
 
811
    global server
1331
812
    # From the Avahi example code
1332
813
    DBusGMainLoop(set_as_default=True )
1333
814
    main_loop = gobject.MainLoop()
1334
815
    bus = dbus.SystemBus()
 
816
    server = dbus.Interface(bus.get_object(avahi.DBUS_NAME,
 
817
                                           avahi.DBUS_PATH_SERVER),
 
818
                            avahi.DBUS_INTERFACE_SERVER)
1335
819
    # End of Avahi example code
1336
 
    if use_dbus:
1337
 
        bus_name = dbus.service.BusName(u"se.bsnet.fukt.Mandos", bus)
1338
 
    protocol = avahi.PROTO_INET6 if use_ipv6 else avahi.PROTO_INET
1339
 
    service = AvahiService(name = server_settings[u"servicename"],
1340
 
                           servicetype = u"_mandos._tcp",
1341
 
                           protocol = protocol, bus = bus)
1342
 
    if server_settings["interface"]:
1343
 
        service.interface = (if_nametoindex
1344
 
                             (str(server_settings[u"interface"])))
1345
 
    
1346
 
    client_class = Client
1347
 
    if use_dbus:
1348
 
        client_class = functools.partial(ClientDBus, bus = bus)
1349
 
    tcp_server.clients.update(set(
1350
 
            client_class(name = section,
1351
 
                         config= dict(client_config.items(section)))
1352
 
            for section in client_config.sections()))
1353
 
    if not tcp_server.clients:
1354
 
        logger.warning(u"No clients defined")
 
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()))
 
832
    if not clients:
 
833
        logger.critical(u"No clients defined")
 
834
        sys.exit(1)
1355
835
    
1356
836
    if debug:
1357
837
        # Redirect stdin so all checkers get /dev/null
1366
846
        daemon()
1367
847
    
1368
848
    try:
1369
 
        with closing(pidfile):
1370
 
            pid = os.getpid()
1371
 
            pidfile.write(str(pid) + "\n")
 
849
        pid = os.getpid()
 
850
        pidfile.write(str(pid) + "\n")
 
851
        pidfile.close()
1372
852
        del pidfile
1373
853
    except IOError:
1374
854
        logger.error(u"Could not write to file %r with PID %d",
1380
860
    
1381
861
    def cleanup():
1382
862
        "Cleanup function; run on exit"
1383
 
        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
1384
869
        
1385
 
        while tcp_server.clients:
1386
 
            client = tcp_server.clients.pop()
1387
 
            client.disable_hook = None
1388
 
            client.disable()
 
870
        while clients:
 
871
            client = clients.pop()
 
872
            client.stop_hook = None
 
873
            client.stop()
1389
874
    
1390
875
    atexit.register(cleanup)
1391
876
    
1394
879
    signal.signal(signal.SIGHUP, lambda signum, frame: sys.exit())
1395
880
    signal.signal(signal.SIGTERM, lambda signum, frame: sys.exit())
1396
881
    
1397
 
    if use_dbus:
1398
 
        class MandosDBusService(dbus.service.Object):
1399
 
            """A D-Bus proxy object"""
1400
 
            def __init__(self):
1401
 
                dbus.service.Object.__init__(self, bus, u"/")
1402
 
            _interface = u"se.bsnet.fukt.Mandos"
1403
 
            
1404
 
            @dbus.service.signal(_interface, signature=u"oa{sv}")
1405
 
            def ClientAdded(self, objpath, properties):
1406
 
                "D-Bus signal"
1407
 
                pass
1408
 
            
1409
 
            @dbus.service.signal(_interface, signature=u"s")
1410
 
            def ClientNotFound(self, fingerprint):
1411
 
                "D-Bus signal"
1412
 
                pass
1413
 
            
1414
 
            @dbus.service.signal(_interface, signature=u"os")
1415
 
            def ClientRemoved(self, objpath, name):
1416
 
                "D-Bus signal"
1417
 
                pass
1418
 
            
1419
 
            @dbus.service.method(_interface, out_signature=u"ao")
1420
 
            def GetAllClients(self):
1421
 
                "D-Bus method"
1422
 
                return dbus.Array(c.dbus_object_path
1423
 
                                  for c in tcp_server.clients)
1424
 
            
1425
 
            @dbus.service.method(_interface,
1426
 
                                 out_signature=u"a{oa{sv}}")
1427
 
            def GetAllClientsWithProperties(self):
1428
 
                "D-Bus method"
1429
 
                return dbus.Dictionary(
1430
 
                    ((c.dbus_object_path, c.GetAllProperties())
1431
 
                     for c in tcp_server.clients),
1432
 
                    signature=u"oa{sv}")
1433
 
            
1434
 
            @dbus.service.method(_interface, in_signature=u"o")
1435
 
            def RemoveClient(self, object_path):
1436
 
                "D-Bus method"
1437
 
                for c in tcp_server.clients:
1438
 
                    if c.dbus_object_path == object_path:
1439
 
                        tcp_server.clients.remove(c)
1440
 
                        c.remove_from_connection()
1441
 
                        # Don't signal anything except ClientRemoved
1442
 
                        c.disable(signal=False)
1443
 
                        # Emit D-Bus signal
1444
 
                        self.ClientRemoved(object_path, c.name)
1445
 
                        return
1446
 
                raise KeyError
1447
 
            
1448
 
            del _interface
1449
 
        
1450
 
        mandos_dbus_service = MandosDBusService()
1451
 
    
1452
 
    for client in tcp_server.clients:
1453
 
        if use_dbus:
1454
 
            # Emit D-Bus signal
1455
 
            mandos_dbus_service.ClientAdded(client.dbus_object_path,
1456
 
                                            client.GetAllProperties())
1457
 
        client.enable()
 
882
    for client in clients:
 
883
        client.start()
1458
884
    
1459
885
    tcp_server.enable()
1460
886
    tcp_server.server_activate()
1461
887
    
1462
888
    # Find out what port we got
1463
889
    service.port = tcp_server.socket.getsockname()[1]
1464
 
    if use_ipv6:
1465
 
        logger.info(u"Now listening on address %r, port %d,"
1466
 
                    " flowinfo %d, scope_id %d"
1467
 
                    % tcp_server.socket.getsockname())
1468
 
    else:                       # IPv4
1469
 
        logger.info(u"Now listening on address %r, port %d"
1470
 
                    % 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())
1471
892
    
1472
893
    #service.interface = tcp_server.socket.getsockname()[3]
1473
894
    
1474
895
    try:
1475
896
        # From the Avahi example code
 
897
        server.connect_to_signal("StateChanged", server_state_changed)
1476
898
        try:
1477
 
            service.activate()
 
899
            server_state_changed(server.GetState())
1478
900
        except dbus.exceptions.DBusException, error:
1479
901
            logger.critical(u"DBusException: %s", error)
1480
902
            sys.exit(1)
1482
904
        
1483
905
        gobject.io_add_watch(tcp_server.fileno(), gobject.IO_IN,
1484
906
                             lambda *args, **kwargs:
1485
 
                             (tcp_server.handle_request
1486
 
                              (*args[2:], **kwargs) or True))
 
907
                             tcp_server.handle_request\
 
908
                             (*args[2:], **kwargs) or True)
1487
909
        
1488
910
        logger.debug(u"Starting main loop")
1489
911
        main_loop.run()
1490
912
    except AvahiError, error:
1491
 
        logger.critical(u"AvahiError: %s", error)
 
913
        logger.critical(u"AvahiError: %s" + unicode(error))
1492
914
        sys.exit(1)
1493
915
    except KeyboardInterrupt:
1494
916
        if debug:
1495
 
            print >> sys.stderr
1496
 
        logger.debug(u"Server received KeyboardInterrupt")
1497
 
    logger.debug(u"Server exiting")
 
917
            print
1498
918
 
1499
919
if __name__ == '__main__':
1500
920
    main()