/mandos/trunk

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  • Committer: Teddy Hogeborn
  • Date: 2008-07-31 19:48:05 UTC
  • Revision ID: teddy@fukt.bsnet.se-20080731194805-mseis21dxwrdfqhk
* plugins.d/mandosclient.c (start_mandos_communication): Changed
                                                        "if_index" to
                                                        be of type
                                                        "AvahiIfIndex".
                                                        All callers
                                                        changed.
 (main): Add default values to "interface" and "if_index".  Only
         change if_index from default if "interface" was given.

* server.py (IPv6_TCPServer.server_bind): Bug fix: test if interface
                                          is empty, not if equal to
                                          avahi.IF_UNSPEC.
  (if_nametoindex): Bug fix; typo: assign to _func[0], not func[0].
  (main): Bug fix: Do not set service.interface unless the interface
          setting has been given.

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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
# following functions: "AvahiService.add", "AvahiService.remove",
 
10
# "server_state_changed", "entry_group_state_changed", and some lines
 
11
# in "main".
12
12
13
13
# Everything else is
14
 
# Copyright © 2008,2009 Teddy Hogeborn
15
 
# Copyright © 2008,2009 Björn Påhlsson
 
14
# Copyright © 2007-2008 Teddy Hogeborn & Björn Påhlsson
16
15
17
16
# This program is free software: you can redistribute it and/or modify
18
17
# it under the terms of the GNU General Public License as published by
25
24
#     GNU General Public License for more details.
26
25
27
26
# You should have received a copy of the GNU General Public License
28
 
# along with this program.  If not, see
29
 
# <http://www.gnu.org/licenses/>.
 
27
# along with this program.  If not, see <http://www.gnu.org/licenses/>.
30
28
31
29
# Contact the authors at <mandos@fukt.bsnet.se>.
32
30
33
31
 
34
 
from __future__ import division, with_statement, absolute_import
 
32
from __future__ import division
35
33
 
36
 
import SocketServer as socketserver
 
34
import SocketServer
37
35
import socket
38
 
import optparse
 
36
import select
 
37
from optparse import OptionParser
39
38
import datetime
40
39
import errno
41
40
import gnutls.crypto
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
 
import pwd
58
 
import contextlib
59
 
import struct
60
 
import fcntl
61
 
import functools
62
 
import cPickle as pickle
63
 
import multiprocessing
64
57
 
65
58
import dbus
66
 
import dbus.service
67
59
import gobject
68
60
import avahi
69
61
from dbus.mainloop.glib import DBusGMainLoop
70
62
import ctypes
71
 
import ctypes.util
72
 
import xml.dom.minidom
73
 
import inspect
74
 
 
75
 
try:
76
 
    SO_BINDTODEVICE = socket.SO_BINDTODEVICE
77
 
except AttributeError:
78
 
    try:
79
 
        from IN import SO_BINDTODEVICE
80
 
    except ImportError:
81
 
        SO_BINDTODEVICE = None
82
 
 
83
 
 
84
 
version = "1.0.14"
85
 
 
86
 
#logger = logging.getLogger(u'mandos')
87
 
logger = logging.Logger(u'mandos')
88
 
syslogger = (logging.handlers.SysLogHandler
89
 
             (facility = logging.handlers.SysLogHandler.LOG_DAEMON,
90
 
              address = "/dev/log"))
91
 
syslogger.setFormatter(logging.Formatter
92
 
                       (u'Mandos [%(process)d]: %(levelname)s:'
93
 
                        u' %(message)s'))
 
63
 
 
64
# Brief description of the operation of this program:
 
65
 
66
# This server announces itself as a Zeroconf service.  Connecting
 
67
# clients use the TLS protocol, with the unusual quirk that this
 
68
# server program acts as a TLS "client" while a connecting client acts
 
69
# as a TLS "server".  The client (acting as a TLS "server") must
 
70
# supply an OpenPGP certificate, and the fingerprint of this
 
71
# certificate is used by this server to look up (in a list read from a
 
72
# file at start time) which binary blob to give the client.  No other
 
73
# authentication or authorization is done by this server.
 
74
 
 
75
 
 
76
logger = logging.Logger('mandos')
 
77
syslogger = logging.handlers.SysLogHandler\
 
78
            (facility = logging.handlers.SysLogHandler.LOG_DAEMON)
 
79
syslogger.setFormatter(logging.Formatter\
 
80
                        ('%(levelname)s: %(message)s'))
94
81
logger.addHandler(syslogger)
 
82
del syslogger
95
83
 
96
 
console = logging.StreamHandler()
97
 
console.setFormatter(logging.Formatter(u'%(name)s [%(process)d]:'
98
 
                                       u' %(levelname)s:'
99
 
                                       u' %(message)s'))
100
 
logger.addHandler(console)
101
84
 
102
85
class AvahiError(Exception):
103
 
    def __init__(self, value, *args, **kwargs):
 
86
    def __init__(self, value):
104
87
        self.value = value
105
 
        super(AvahiError, self).__init__(value, *args, **kwargs)
106
 
    def __unicode__(self):
107
 
        return unicode(repr(self.value))
 
88
    def __str__(self):
 
89
        return repr(self.value)
108
90
 
109
91
class AvahiServiceError(AvahiError):
110
92
    pass
114
96
 
115
97
 
116
98
class AvahiService(object):
117
 
    """An Avahi (Zeroconf) service.
118
 
    
119
 
    Attributes:
 
99
    """
120
100
    interface: integer; avahi.IF_UNSPEC or an interface index.
121
101
               Used to optionally bind to the specified interface.
122
 
    name: string; Example: u'Mandos'
123
 
    type: string; Example: u'_mandos._tcp'.
124
 
                  See <http://www.dns-sd.org/ServiceTypes.html>
125
 
    port: integer; what port to announce
126
 
    TXT: list of strings; TXT record for the service
127
 
    domain: string; Domain to publish on, default to .local if empty.
128
 
    host: string; Host to publish records for, default is localhost
129
 
    max_renames: integer; maximum number of renames
130
 
    rename_count: integer; counter so we only rename after collisions
131
 
                  a sensible number of times
132
 
    group: D-Bus Entry Group
133
 
    server: D-Bus Server
134
 
    bus: dbus.SystemBus()
 
102
    name = string; Example: "Mandos"
 
103
    type = string; Example: "_mandos._tcp".
 
104
                   See <http://www.dns-sd.org/ServiceTypes.html>
 
105
    port = integer; what port to announce
 
106
    TXT = list of strings; TXT record for the service
 
107
    domain = string; Domain to publish on, default to .local if empty.
 
108
    host = string; Host to publish records for, default to localhost
 
109
                   if empty.
 
110
    max_renames = integer; maximum number of renames
 
111
    rename_count = integer; counter so we only rename after collisions
 
112
                   a sensible number of times
135
113
    """
136
114
    def __init__(self, interface = avahi.IF_UNSPEC, name = None,
137
 
                 servicetype = None, port = None, TXT = None,
138
 
                 domain = u"", host = u"", max_renames = 32768,
139
 
                 protocol = avahi.PROTO_UNSPEC, bus = None):
 
115
                 type = None, port = None, TXT = None, domain = "",
 
116
                 host = "", max_renames = 12):
 
117
        """An Avahi (Zeroconf) service. """
140
118
        self.interface = interface
141
119
        self.name = name
142
 
        self.type = servicetype
 
120
        self.type = type
143
121
        self.port = port
144
 
        self.TXT = TXT if TXT is not None else []
 
122
        if TXT is None:
 
123
            self.TXT = []
 
124
        else:
 
125
            self.TXT = TXT
145
126
        self.domain = domain
146
127
        self.host = host
147
128
        self.rename_count = 0
148
 
        self.max_renames = max_renames
149
 
        self.protocol = protocol
150
 
        self.group = None       # our entry group
151
 
        self.server = None
152
 
        self.bus = bus
153
129
    def rename(self):
154
130
        """Derived from the Avahi example code"""
155
131
        if self.rename_count >= self.max_renames:
156
 
            logger.critical(u"No suitable Zeroconf service name found"
157
 
                            u" after %i retries, exiting.",
158
 
                            self.rename_count)
159
 
            raise AvahiServiceError(u"Too many renames")
160
 
        self.name = self.server.GetAlternativeServiceName(self.name)
161
 
        logger.info(u"Changing Zeroconf service name to %r ...",
162
 
                    unicode(self.name))
163
 
        syslogger.setFormatter(logging.Formatter
164
 
                               (u'Mandos (%s) [%%(process)d]:'
165
 
                                u' %%(levelname)s: %%(message)s'
166
 
                                % self.name))
 
132
            logger.critical(u"No suitable service name found after %i"
 
133
                            u" retries, exiting.", rename_count)
 
134
            raise AvahiServiceError("Too many renames")
 
135
        name = server.GetAlternativeServiceName(name)
 
136
        logger.notice(u"Changing name to %r ...", name)
167
137
        self.remove()
168
138
        self.add()
169
139
        self.rename_count += 1
170
140
    def remove(self):
171
141
        """Derived from the Avahi example code"""
172
 
        if self.group is not None:
173
 
            self.group.Reset()
 
142
        if group is not None:
 
143
            group.Reset()
174
144
    def add(self):
175
145
        """Derived from the Avahi example code"""
176
 
        if self.group is None:
177
 
            self.group = dbus.Interface(
178
 
                self.bus.get_object(avahi.DBUS_NAME,
179
 
                                    self.server.EntryGroupNew()),
180
 
                avahi.DBUS_INTERFACE_ENTRY_GROUP)
181
 
            self.group.connect_to_signal('StateChanged',
182
 
                                         self
183
 
                                         .entry_group_state_changed)
184
 
        logger.debug(u"Adding Zeroconf service '%s' of type '%s' ...",
185
 
                     self.name, self.type)
186
 
        self.group.AddService(
187
 
            self.interface,
188
 
            self.protocol,
189
 
            dbus.UInt32(0),     # flags
190
 
            self.name, self.type,
191
 
            self.domain, self.host,
192
 
            dbus.UInt16(self.port),
193
 
            avahi.string_array_to_txt_array(self.TXT))
194
 
        self.group.Commit()
195
 
    def entry_group_state_changed(self, state, error):
196
 
        """Derived from the Avahi example code"""
197
 
        logger.debug(u"Avahi state change: %i", state)
198
 
        
199
 
        if state == avahi.ENTRY_GROUP_ESTABLISHED:
200
 
            logger.debug(u"Zeroconf service established.")
201
 
        elif state == avahi.ENTRY_GROUP_COLLISION:
202
 
            logger.warning(u"Zeroconf service name collision.")
203
 
            self.rename()
204
 
        elif state == avahi.ENTRY_GROUP_FAILURE:
205
 
            logger.critical(u"Avahi: Error in group state changed %s",
206
 
                            unicode(error))
207
 
            raise AvahiGroupError(u"State changed: %s"
208
 
                                  % unicode(error))
209
 
    def cleanup(self):
210
 
        """Derived from the Avahi example code"""
211
 
        if self.group is not None:
212
 
            self.group.Free()
213
 
            self.group = None
214
 
    def server_state_changed(self, state):
215
 
        """Derived from the Avahi example code"""
216
 
        if state == avahi.SERVER_COLLISION:
217
 
            logger.error(u"Zeroconf server name collision")
218
 
            self.remove()
219
 
        elif state == avahi.SERVER_RUNNING:
220
 
            self.add()
221
 
    def activate(self):
222
 
        """Derived from the Avahi example code"""
223
 
        if self.server is None:
224
 
            self.server = dbus.Interface(
225
 
                self.bus.get_object(avahi.DBUS_NAME,
226
 
                                    avahi.DBUS_PATH_SERVER),
227
 
                avahi.DBUS_INTERFACE_SERVER)
228
 
        self.server.connect_to_signal(u"StateChanged",
229
 
                                 self.server_state_changed)
230
 
        self.server_state_changed(self.server.GetState())
 
146
        global group
 
147
        if group is None:
 
148
            group = dbus.Interface\
 
149
                    (bus.get_object(avahi.DBUS_NAME,
 
150
                                    server.EntryGroupNew()),
 
151
                     avahi.DBUS_INTERFACE_ENTRY_GROUP)
 
152
            group.connect_to_signal('StateChanged',
 
153
                                    entry_group_state_changed)
 
154
        logger.debug(u"Adding service '%s' of type '%s' ...",
 
155
                     service.name, service.type)
 
156
        group.AddService(
 
157
                self.interface,         # interface
 
158
                avahi.PROTO_INET6,      # protocol
 
159
                dbus.UInt32(0),         # flags
 
160
                self.name, self.type,
 
161
                self.domain, self.host,
 
162
                dbus.UInt16(self.port),
 
163
                avahi.string_array_to_txt_array(self.TXT))
 
164
        group.Commit()
 
165
 
 
166
# From the Avahi example code:
 
167
group = None                            # our entry group
 
168
# End of Avahi example code
231
169
 
232
170
 
233
171
class Client(object):
234
172
    """A representation of a client host served by this server.
235
 
    
236
173
    Attributes:
237
 
    name:       string; from the config file, used in log messages and
238
 
                        D-Bus identifiers
 
174
    name:      string; from the config file, used in log messages
239
175
    fingerprint: string (40 or 32 hexadecimal digits); used to
240
176
                 uniquely identify the client
241
 
    secret:     bytestring; sent verbatim (over TLS) to client
242
 
    host:       string; available for use by the checker command
243
 
    created:    datetime.datetime(); (UTC) object creation
244
 
    last_enabled: datetime.datetime(); (UTC)
245
 
    enabled:    bool()
246
 
    last_checked_ok: datetime.datetime(); (UTC) or None
247
 
    timeout:    datetime.timedelta(); How long from last_checked_ok
248
 
                                      until this client is disabled
249
 
    interval:   datetime.timedelta(); How often to start a new checker
250
 
    disable_hook:  If set, called by disable() as disable_hook(self)
251
 
    checker:    subprocess.Popen(); a running checker process used
252
 
                                    to see if the client lives.
253
 
                                    'None' if no process is running.
 
177
    secret:    bytestring; sent verbatim (over TLS) to client
 
178
    fqdn:      string (FQDN); available for use by the checker command
 
179
    created:   datetime.datetime(); object creation, not client host
 
180
    last_checked_ok: datetime.datetime() or None if not yet checked OK
 
181
    timeout:   datetime.timedelta(); How long from last_checked_ok
 
182
                                     until this client is invalid
 
183
    interval:  datetime.timedelta(); How often to start a new checker
 
184
    stop_hook: If set, called by stop() as stop_hook(self)
 
185
    checker:   subprocess.Popen(); a running checker process used
 
186
                                   to see if the client lives.
 
187
                                   'None' if no process is running.
254
188
    checker_initiator_tag: a gobject event source tag, or None
255
 
    disable_initiator_tag: - '' -
 
189
    stop_initiator_tag:    - '' -
256
190
    checker_callback_tag:  - '' -
257
191
    checker_command: string; External command which is run to check if
258
192
                     client lives.  %() expansions are done at
259
193
                     runtime with vars(self) as dict, so that for
260
194
                     instance %(name)s can be used in the command.
261
 
    current_checker_command: string; current running checker_command
262
 
    approved_delay: datetime.timedelta(); Time to wait for approval
263
 
    _approved:   bool(); 'None' if not yet approved/disapproved
264
 
    approved_duration: datetime.timedelta(); Duration of one approval
 
195
    Private attibutes:
 
196
    _timeout: Real variable for 'timeout'
 
197
    _interval: Real variable for 'interval'
 
198
    _timeout_milliseconds: Used when calling gobject.timeout_add()
 
199
    _interval_milliseconds: - '' -
265
200
    """
266
 
    
267
 
    @staticmethod
268
 
    def _timedelta_to_milliseconds(td):
269
 
        "Convert a datetime.timedelta() to milliseconds"
270
 
        return ((td.days * 24 * 60 * 60 * 1000)
271
 
                + (td.seconds * 1000)
272
 
                + (td.microseconds // 1000))
273
 
    
274
 
    def timeout_milliseconds(self):
275
 
        "Return the 'timeout' attribute in milliseconds"
276
 
        return self._timedelta_to_milliseconds(self.timeout)
277
 
    
278
 
    def interval_milliseconds(self):
279
 
        "Return the 'interval' attribute in milliseconds"
280
 
        return self._timedelta_to_milliseconds(self.interval)
281
 
 
282
 
    def approved_delay_milliseconds(self):
283
 
        return self._timedelta_to_milliseconds(self.approved_delay)
284
 
    
285
 
    def __init__(self, name = None, disable_hook=None, config=None):
286
 
        """Note: the 'checker' key in 'config' sets the
287
 
        'checker_command' attribute and *not* the 'checker'
288
 
        attribute."""
 
201
    def _set_timeout(self, timeout):
 
202
        "Setter function for 'timeout' attribute"
 
203
        self._timeout = timeout
 
204
        self._timeout_milliseconds = ((self.timeout.days
 
205
                                       * 24 * 60 * 60 * 1000)
 
206
                                      + (self.timeout.seconds * 1000)
 
207
                                      + (self.timeout.microseconds
 
208
                                         // 1000))
 
209
    timeout = property(lambda self: self._timeout,
 
210
                       _set_timeout)
 
211
    del _set_timeout
 
212
    def _set_interval(self, interval):
 
213
        "Setter function for 'interval' attribute"
 
214
        self._interval = interval
 
215
        self._interval_milliseconds = ((self.interval.days
 
216
                                        * 24 * 60 * 60 * 1000)
 
217
                                       + (self.interval.seconds
 
218
                                          * 1000)
 
219
                                       + (self.interval.microseconds
 
220
                                          // 1000))
 
221
    interval = property(lambda self: self._interval,
 
222
                        _set_interval)
 
223
    del _set_interval
 
224
    def __init__(self, name=None, stop_hook=None, fingerprint=None,
 
225
                 secret=None, secfile=None, fqdn=None, timeout=None,
 
226
                 interval=-1, checker=None):
 
227
        """Note: the 'checker' argument sets the 'checker_command'
 
228
        attribute and not the 'checker' attribute.."""
289
229
        self.name = name
290
 
        if config is None:
291
 
            config = {}
292
230
        logger.debug(u"Creating client %r", self.name)
293
 
        # Uppercase and remove spaces from fingerprint for later
294
 
        # comparison purposes with return value from the fingerprint()
295
 
        # function
296
 
        self.fingerprint = (config[u"fingerprint"].upper()
297
 
                            .replace(u" ", u""))
 
231
        # Uppercase and remove spaces from fingerprint
 
232
        # for later comparison purposes with return value of
 
233
        # the fingerprint() function
 
234
        self.fingerprint = fingerprint.upper().replace(u" ", u"")
298
235
        logger.debug(u"  Fingerprint: %s", self.fingerprint)
299
 
        if u"secret" in config:
300
 
            self.secret = config[u"secret"].decode(u"base64")
301
 
        elif u"secfile" in config:
302
 
            with open(os.path.expanduser(os.path.expandvars
303
 
                                         (config[u"secfile"])),
304
 
                      "rb") as secfile:
305
 
                self.secret = secfile.read()
 
236
        if secret:
 
237
            self.secret = secret.decode(u"base64")
 
238
        elif secfile:
 
239
            sf = open(secfile)
 
240
            self.secret = sf.read()
 
241
            sf.close()
306
242
        else:
307
 
            #XXX Need to allow secret on demand!
308
243
            raise TypeError(u"No secret or secfile for client %s"
309
244
                            % self.name)
310
 
        self.host = config.get(u"host", u"")
311
 
        self.created = datetime.datetime.utcnow()
312
 
        self.enabled = False
313
 
        self.last_enabled = None
 
245
        self.fqdn = fqdn
 
246
        self.created = datetime.datetime.now()
314
247
        self.last_checked_ok = None
315
 
        self.timeout = string_to_delta(config[u"timeout"])
316
 
        self.interval = string_to_delta(config[u"interval"])
317
 
        self.disable_hook = disable_hook
 
248
        self.timeout = string_to_delta(timeout)
 
249
        self.interval = string_to_delta(interval)
 
250
        self.stop_hook = stop_hook
318
251
        self.checker = None
319
252
        self.checker_initiator_tag = None
320
 
        self.disable_initiator_tag = None
 
253
        self.stop_initiator_tag = None
321
254
        self.checker_callback_tag = None
322
 
        self.checker_command = config[u"checker"]
323
 
        self.current_checker_command = None
324
 
        self.last_connect = None
325
 
        self._approved = None
326
 
        self.approved_by_default = config.get(u"approved_by_default",
327
 
                                              True)
328
 
        self.approvals_pending = 0
329
 
        self.approved_delay = string_to_delta(
330
 
            config[u"approved_delay"])
331
 
        self.approved_duration = string_to_delta(
332
 
            config[u"approved_duration"])
333
 
        self.changedstate = multiprocessing_manager.Condition(multiprocessing_manager.Lock())
334
 
    
335
 
    def send_changedstate(self):
336
 
        self.changedstate.acquire()
337
 
        self.changedstate.notify_all()
338
 
        self.changedstate.release()
339
 
        
340
 
    def enable(self):
 
255
        self.check_command = checker
 
256
    def start(self):
341
257
        """Start this client's checker and timeout hooks"""
342
 
        if getattr(self, u"enabled", False):
343
 
            # Already enabled
344
 
            return
345
 
        self.send_changedstate()
346
 
        self.last_enabled = datetime.datetime.utcnow()
347
258
        # Schedule a new checker to be started an 'interval' from now,
348
259
        # and every interval from then on.
349
 
        self.checker_initiator_tag = (gobject.timeout_add
350
 
                                      (self.interval_milliseconds(),
351
 
                                       self.start_checker))
352
 
        # Schedule a disable() when 'timeout' has passed
353
 
        self.disable_initiator_tag = (gobject.timeout_add
354
 
                                   (self.timeout_milliseconds(),
355
 
                                    self.disable))
356
 
        self.enabled = True
 
260
        self.checker_initiator_tag = gobject.timeout_add\
 
261
                                     (self._interval_milliseconds,
 
262
                                      self.start_checker)
357
263
        # Also start a new checker *right now*.
358
264
        self.start_checker()
359
 
    
360
 
    def disable(self, quiet=True):
361
 
        """Disable this client."""
362
 
        if not getattr(self, "enabled", False):
 
265
        # Schedule a stop() when 'timeout' has passed
 
266
        self.stop_initiator_tag = gobject.timeout_add\
 
267
                                  (self._timeout_milliseconds,
 
268
                                   self.stop)
 
269
    def stop(self):
 
270
        """Stop this client.
 
271
        The possibility that a client might be restarted is left open,
 
272
        but not currently used."""
 
273
        # If this client doesn't have a secret, it is already stopped.
 
274
        if self.secret:
 
275
            logger.debug(u"Stopping client %s", self.name)
 
276
            self.secret = None
 
277
        else:
363
278
            return False
364
 
        if not quiet:
365
 
            self.send_changedstate()
366
 
        if not quiet:
367
 
            logger.info(u"Disabling client %s", self.name)
368
 
        if getattr(self, u"disable_initiator_tag", False):
369
 
            gobject.source_remove(self.disable_initiator_tag)
370
 
            self.disable_initiator_tag = None
371
 
        if getattr(self, u"checker_initiator_tag", False):
 
279
        if getattr(self, "stop_initiator_tag", False):
 
280
            gobject.source_remove(self.stop_initiator_tag)
 
281
            self.stop_initiator_tag = None
 
282
        if getattr(self, "checker_initiator_tag", False):
372
283
            gobject.source_remove(self.checker_initiator_tag)
373
284
            self.checker_initiator_tag = None
374
285
        self.stop_checker()
375
 
        if self.disable_hook:
376
 
            self.disable_hook(self)
377
 
        self.enabled = False
 
286
        if self.stop_hook:
 
287
            self.stop_hook(self)
378
288
        # Do not run this again if called by a gobject.timeout_add
379
289
        return False
380
 
    
381
290
    def __del__(self):
382
 
        self.disable_hook = None
383
 
        self.disable()
384
 
    
385
 
    def checker_callback(self, pid, condition, command):
 
291
        self.stop_hook = None
 
292
        self.stop()
 
293
    def checker_callback(self, pid, condition):
386
294
        """The checker has completed, so take appropriate actions."""
 
295
        now = datetime.datetime.now()
387
296
        self.checker_callback_tag = None
388
297
        self.checker = None
389
 
        if os.WIFEXITED(condition):
390
 
            exitstatus = os.WEXITSTATUS(condition)
391
 
            if exitstatus == 0:
392
 
                logger.info(u"Checker for %(name)s succeeded",
393
 
                            vars(self))
394
 
                self.checked_ok()
395
 
            else:
396
 
                logger.info(u"Checker for %(name)s failed",
397
 
                            vars(self))
398
 
        else:
 
298
        if os.WIFEXITED(condition) \
 
299
               and (os.WEXITSTATUS(condition) == 0):
 
300
            logger.debug(u"Checker for %(name)s succeeded",
 
301
                         vars(self))
 
302
            self.last_checked_ok = now
 
303
            gobject.source_remove(self.stop_initiator_tag)
 
304
            self.stop_initiator_tag = gobject.timeout_add\
 
305
                                      (self._timeout_milliseconds,
 
306
                                       self.stop)
 
307
        elif not os.WIFEXITED(condition):
399
308
            logger.warning(u"Checker for %(name)s crashed?",
400
309
                           vars(self))
401
 
    
402
 
    def checked_ok(self):
403
 
        """Bump up the timeout for this client.
404
 
        
405
 
        This should only be called when the client has been seen,
406
 
        alive and well.
407
 
        """
408
 
        self.last_checked_ok = datetime.datetime.utcnow()
409
 
        gobject.source_remove(self.disable_initiator_tag)
410
 
        self.disable_initiator_tag = (gobject.timeout_add
411
 
                                      (self.timeout_milliseconds(),
412
 
                                       self.disable))
413
 
    
 
310
        else:
 
311
            logger.debug(u"Checker for %(name)s failed",
 
312
                         vars(self))
414
313
    def start_checker(self):
415
314
        """Start a new checker subprocess if one is not running.
416
 
        
417
315
        If a checker already exists, leave it running and do
418
316
        nothing."""
419
317
        # The reason for not killing a running checker is that if we
422
320
        # client would inevitably timeout, since no checker would get
423
321
        # a chance to run to completion.  If we instead leave running
424
322
        # checkers alone, the checker would have to take more time
425
 
        # than 'timeout' for the client to be disabled, which is as it
426
 
        # should be.
427
 
        
428
 
        # If a checker exists, make sure it is not a zombie
429
 
        try:
430
 
            pid, status = os.waitpid(self.checker.pid, os.WNOHANG)
431
 
        except (AttributeError, OSError), error:
432
 
            if (isinstance(error, OSError)
433
 
                and error.errno != errno.ECHILD):
434
 
                raise error
435
 
        else:
436
 
            if pid:
437
 
                logger.warning(u"Checker was a zombie")
438
 
                gobject.source_remove(self.checker_callback_tag)
439
 
                self.checker_callback(pid, status,
440
 
                                      self.current_checker_command)
441
 
        # Start a new checker if needed
 
323
        # than 'timeout' for the client to be declared invalid, which
 
324
        # is as it should be.
442
325
        if self.checker is None:
443
326
            try:
444
 
                # In case checker_command has exactly one % operator
445
 
                command = self.checker_command % self.host
 
327
                # In case check_command has exactly one % operator
 
328
                command = self.check_command % self.fqdn
446
329
            except TypeError:
447
330
                # Escape attributes for the shell
448
 
                escaped_attrs = dict((key,
449
 
                                      re.escape(unicode(str(val),
450
 
                                                        errors=
451
 
                                                        u'replace')))
 
331
                escaped_attrs = dict((key, re.escape(str(val)))
452
332
                                     for key, val in
453
333
                                     vars(self).iteritems())
454
334
                try:
455
 
                    command = self.checker_command % escaped_attrs
 
335
                    command = self.check_command % escaped_attrs
456
336
                except TypeError, error:
457
337
                    logger.error(u'Could not format string "%s":'
458
 
                                 u' %s', self.checker_command, error)
 
338
                                 u' %s', self.check_command, error)
459
339
                    return True # Try again later
460
 
            self.current_checker_command = command
461
340
            try:
462
 
                logger.info(u"Starting checker %r for %s",
463
 
                            command, self.name)
464
 
                # We don't need to redirect stdout and stderr, since
465
 
                # in normal mode, that is already done by daemon(),
466
 
                # and in debug mode we don't want to.  (Stdin is
467
 
                # always replaced by /dev/null.)
 
341
                logger.debug(u"Starting checker %r for %s",
 
342
                             command, self.name)
468
343
                self.checker = subprocess.Popen(command,
469
344
                                                close_fds=True,
470
 
                                                shell=True, cwd=u"/")
471
 
                self.checker_callback_tag = (gobject.child_watch_add
472
 
                                             (self.checker.pid,
473
 
                                              self.checker_callback,
474
 
                                              data=command))
475
 
                # The checker may have completed before the gobject
476
 
                # watch was added.  Check for this.
477
 
                pid, status = os.waitpid(self.checker.pid, os.WNOHANG)
478
 
                if pid:
479
 
                    gobject.source_remove(self.checker_callback_tag)
480
 
                    self.checker_callback(pid, status, command)
481
 
            except OSError, error:
 
345
                                                shell=True, cwd="/")
 
346
                self.checker_callback_tag = gobject.child_watch_add\
 
347
                                            (self.checker.pid,
 
348
                                             self.checker_callback)
 
349
            except subprocess.OSError, error:
482
350
                logger.error(u"Failed to start subprocess: %s",
483
351
                             error)
484
352
        # Re-run this periodically if run by gobject.timeout_add
485
353
        return True
486
 
    
487
354
    def stop_checker(self):
488
355
        """Force the checker process, if any, to stop."""
489
356
        if self.checker_callback_tag:
490
357
            gobject.source_remove(self.checker_callback_tag)
491
358
            self.checker_callback_tag = None
492
 
        if getattr(self, u"checker", None) is None:
 
359
        if getattr(self, "checker", None) is None:
493
360
            return
494
 
        logger.debug(u"Stopping checker for %(name)s", vars(self))
 
361
        logger.debug("Stopping checker for %(name)s", vars(self))
495
362
        try:
496
363
            os.kill(self.checker.pid, signal.SIGTERM)
497
 
            #time.sleep(0.5)
 
364
            #os.sleep(0.5)
498
365
            #if self.checker.poll() is None:
499
366
            #    os.kill(self.checker.pid, signal.SIGKILL)
500
367
        except OSError, error:
501
368
            if error.errno != errno.ESRCH: # No such process
502
369
                raise
503
370
        self.checker = None
504
 
 
505
 
def dbus_service_property(dbus_interface, signature=u"v",
506
 
                          access=u"readwrite", byte_arrays=False):
507
 
    """Decorators for marking methods of a DBusObjectWithProperties to
508
 
    become properties on the D-Bus.
509
 
    
510
 
    The decorated method will be called with no arguments by "Get"
511
 
    and with one argument by "Set".
512
 
    
513
 
    The parameters, where they are supported, are the same as
514
 
    dbus.service.method, except there is only "signature", since the
515
 
    type from Get() and the type sent to Set() is the same.
516
 
    """
517
 
    # Encoding deeply encoded byte arrays is not supported yet by the
518
 
    # "Set" method, so we fail early here:
519
 
    if byte_arrays and signature != u"ay":
520
 
        raise ValueError(u"Byte arrays not supported for non-'ay'"
521
 
                         u" signature %r" % signature)
522
 
    def decorator(func):
523
 
        func._dbus_is_property = True
524
 
        func._dbus_interface = dbus_interface
525
 
        func._dbus_signature = signature
526
 
        func._dbus_access = access
527
 
        func._dbus_name = func.__name__
528
 
        if func._dbus_name.endswith(u"_dbus_property"):
529
 
            func._dbus_name = func._dbus_name[:-14]
530
 
        func._dbus_get_args_options = {u'byte_arrays': byte_arrays }
531
 
        return func
532
 
    return decorator
533
 
 
534
 
 
535
 
class DBusPropertyException(dbus.exceptions.DBusException):
536
 
    """A base class for D-Bus property-related exceptions
537
 
    """
538
 
    def __unicode__(self):
539
 
        return unicode(str(self))
540
 
 
541
 
 
542
 
class DBusPropertyAccessException(DBusPropertyException):
543
 
    """A property's access permissions disallows an operation.
544
 
    """
545
 
    pass
546
 
 
547
 
 
548
 
class DBusPropertyNotFound(DBusPropertyException):
549
 
    """An attempt was made to access a non-existing property.
550
 
    """
551
 
    pass
552
 
 
553
 
 
554
 
class DBusObjectWithProperties(dbus.service.Object):
555
 
    """A D-Bus object with properties.
556
 
 
557
 
    Classes inheriting from this can use the dbus_service_property
558
 
    decorator to expose methods as D-Bus properties.  It exposes the
559
 
    standard Get(), Set(), and GetAll() methods on the D-Bus.
560
 
    """
561
 
    
562
 
    @staticmethod
563
 
    def _is_dbus_property(obj):
564
 
        return getattr(obj, u"_dbus_is_property", False)
565
 
    
566
 
    def _get_all_dbus_properties(self):
567
 
        """Returns a generator of (name, attribute) pairs
568
 
        """
569
 
        return ((prop._dbus_name, prop)
570
 
                for name, prop in
571
 
                inspect.getmembers(self, self._is_dbus_property))
572
 
    
573
 
    def _get_dbus_property(self, interface_name, property_name):
574
 
        """Returns a bound method if one exists which is a D-Bus
575
 
        property with the specified name and interface.
576
 
        """
577
 
        for name in (property_name,
578
 
                     property_name + u"_dbus_property"):
579
 
            prop = getattr(self, name, None)
580
 
            if (prop is None
581
 
                or not self._is_dbus_property(prop)
582
 
                or prop._dbus_name != property_name
583
 
                or (interface_name and prop._dbus_interface
584
 
                    and interface_name != prop._dbus_interface)):
585
 
                continue
586
 
            return prop
587
 
        # No such property
588
 
        raise DBusPropertyNotFound(self.dbus_object_path + u":"
589
 
                                   + interface_name + u"."
590
 
                                   + property_name)
591
 
    
592
 
    @dbus.service.method(dbus.PROPERTIES_IFACE, in_signature=u"ss",
593
 
                         out_signature=u"v")
594
 
    def Get(self, interface_name, property_name):
595
 
        """Standard D-Bus property Get() method, see D-Bus standard.
596
 
        """
597
 
        prop = self._get_dbus_property(interface_name, property_name)
598
 
        if prop._dbus_access == u"write":
599
 
            raise DBusPropertyAccessException(property_name)
600
 
        value = prop()
601
 
        if not hasattr(value, u"variant_level"):
602
 
            return value
603
 
        return type(value)(value, variant_level=value.variant_level+1)
604
 
    
605
 
    @dbus.service.method(dbus.PROPERTIES_IFACE, in_signature=u"ssv")
606
 
    def Set(self, interface_name, property_name, value):
607
 
        """Standard D-Bus property Set() method, see D-Bus standard.
608
 
        """
609
 
        prop = self._get_dbus_property(interface_name, property_name)
610
 
        if prop._dbus_access == u"read":
611
 
            raise DBusPropertyAccessException(property_name)
612
 
        if prop._dbus_get_args_options[u"byte_arrays"]:
613
 
            # The byte_arrays option is not supported yet on
614
 
            # signatures other than "ay".
615
 
            if prop._dbus_signature != u"ay":
616
 
                raise ValueError
617
 
            value = dbus.ByteArray(''.join(unichr(byte)
618
 
                                           for byte in value))
619
 
        prop(value)
620
 
    
621
 
    @dbus.service.method(dbus.PROPERTIES_IFACE, in_signature=u"s",
622
 
                         out_signature=u"a{sv}")
623
 
    def GetAll(self, interface_name):
624
 
        """Standard D-Bus property GetAll() method, see D-Bus
625
 
        standard.
626
 
 
627
 
        Note: Will not include properties with access="write".
628
 
        """
629
 
        all = {}
630
 
        for name, prop in self._get_all_dbus_properties():
631
 
            if (interface_name
632
 
                and interface_name != prop._dbus_interface):
633
 
                # Interface non-empty but did not match
634
 
                continue
635
 
            # Ignore write-only properties
636
 
            if prop._dbus_access == u"write":
637
 
                continue
638
 
            value = prop()
639
 
            if not hasattr(value, u"variant_level"):
640
 
                all[name] = value
641
 
                continue
642
 
            all[name] = type(value)(value, variant_level=
643
 
                                    value.variant_level+1)
644
 
        return dbus.Dictionary(all, signature=u"sv")
645
 
    
646
 
    @dbus.service.method(dbus.INTROSPECTABLE_IFACE,
647
 
                         out_signature=u"s",
648
 
                         path_keyword='object_path',
649
 
                         connection_keyword='connection')
650
 
    def Introspect(self, object_path, connection):
651
 
        """Standard D-Bus method, overloaded to insert property tags.
652
 
        """
653
 
        xmlstring = dbus.service.Object.Introspect(self, object_path,
654
 
                                                   connection)
655
 
        try:
656
 
            document = xml.dom.minidom.parseString(xmlstring)
657
 
            def make_tag(document, name, prop):
658
 
                e = document.createElement(u"property")
659
 
                e.setAttribute(u"name", name)
660
 
                e.setAttribute(u"type", prop._dbus_signature)
661
 
                e.setAttribute(u"access", prop._dbus_access)
662
 
                return e
663
 
            for if_tag in document.getElementsByTagName(u"interface"):
664
 
                for tag in (make_tag(document, name, prop)
665
 
                            for name, prop
666
 
                            in self._get_all_dbus_properties()
667
 
                            if prop._dbus_interface
668
 
                            == if_tag.getAttribute(u"name")):
669
 
                    if_tag.appendChild(tag)
670
 
                # Add the names to the return values for the
671
 
                # "org.freedesktop.DBus.Properties" methods
672
 
                if (if_tag.getAttribute(u"name")
673
 
                    == u"org.freedesktop.DBus.Properties"):
674
 
                    for cn in if_tag.getElementsByTagName(u"method"):
675
 
                        if cn.getAttribute(u"name") == u"Get":
676
 
                            for arg in cn.getElementsByTagName(u"arg"):
677
 
                                if (arg.getAttribute(u"direction")
678
 
                                    == u"out"):
679
 
                                    arg.setAttribute(u"name", u"value")
680
 
                        elif cn.getAttribute(u"name") == u"GetAll":
681
 
                            for arg in cn.getElementsByTagName(u"arg"):
682
 
                                if (arg.getAttribute(u"direction")
683
 
                                    == u"out"):
684
 
                                    arg.setAttribute(u"name", u"props")
685
 
            xmlstring = document.toxml(u"utf-8")
686
 
            document.unlink()
687
 
        except (AttributeError, xml.dom.DOMException,
688
 
                xml.parsers.expat.ExpatError), error:
689
 
            logger.error(u"Failed to override Introspection method",
690
 
                         error)
691
 
        return xmlstring
692
 
 
693
 
 
694
 
class ClientDBus(Client, DBusObjectWithProperties):
695
 
    """A Client class using D-Bus
696
 
    
697
 
    Attributes:
698
 
    dbus_object_path: dbus.ObjectPath
699
 
    bus: dbus.SystemBus()
700
 
    """
701
 
    # dbus.service.Object doesn't use super(), so we can't either.
702
 
    
703
 
    def __init__(self, bus = None, *args, **kwargs):
704
 
        self._approvals_pending = 0
705
 
        self.bus = bus
706
 
        Client.__init__(self, *args, **kwargs)
707
 
        # Only now, when this client is initialized, can it show up on
708
 
        # the D-Bus
709
 
        self.dbus_object_path = (dbus.ObjectPath
710
 
                                 (u"/clients/"
711
 
                                  + self.name.replace(u".", u"_")))
712
 
        DBusObjectWithProperties.__init__(self, self.bus,
713
 
                                          self.dbus_object_path)
714
 
 
715
 
    #Could possible return a bool(self._approvals_pending),
716
 
    #but this could mess up approvals_pending += 1 XXX 
717
 
    def _get_approvals_pending(self):
718
 
        return self._approvals_pending
719
 
    def _set_approvals_pending(self, value):
720
 
        old_value = self._approvals_pending
721
 
        self._approvals_pending = value
722
 
        bval = bool(value)
723
 
        if (hasattr(self, "dbus_object_path")
724
 
            and bval is not bool(old_value)):
725
 
            dbus_bool = dbus.Boolean(bval, variant_level=1)
726
 
            self.PropertyChanged(dbus.String(u"approved_pending"),
727
 
                                 dbus_bool)
728
 
 
729
 
    approvals_pending = property(_get_approvals_pending,
730
 
                                 _set_approvals_pending)
731
 
    del _get_approvals_pending, _set_approvals_pending
732
 
    
733
 
    @staticmethod
734
 
    def _datetime_to_dbus(dt, variant_level=0):
735
 
        """Convert a UTC datetime.datetime() to a D-Bus type."""
736
 
        return dbus.String(dt.isoformat(),
737
 
                           variant_level=variant_level)
738
 
    
739
 
    def enable(self):
740
 
        oldstate = getattr(self, u"enabled", False)
741
 
        r = Client.enable(self)
742
 
        if oldstate != self.enabled:
743
 
            # Emit D-Bus signals
744
 
            self.PropertyChanged(dbus.String(u"enabled"),
745
 
                                 dbus.Boolean(True, variant_level=1))
746
 
            self.PropertyChanged(
747
 
                dbus.String(u"last_enabled"),
748
 
                self._datetime_to_dbus(self.last_enabled,
749
 
                                       variant_level=1))
750
 
        return r
751
 
    
752
 
    def disable(self, quiet = False):
753
 
        oldstate = getattr(self, u"enabled", False)
754
 
        r = Client.disable(self, quiet=quiet)
755
 
        if not quiet and oldstate != self.enabled:
756
 
            # Emit D-Bus signal
757
 
            self.PropertyChanged(dbus.String(u"enabled"),
758
 
                                 dbus.Boolean(False, variant_level=1))
759
 
        return r
760
 
    
761
 
    def __del__(self, *args, **kwargs):
762
 
        try:
763
 
            self.remove_from_connection()
764
 
        except LookupError:
765
 
            pass
766
 
        if hasattr(DBusObjectWithProperties, u"__del__"):
767
 
            DBusObjectWithProperties.__del__(self, *args, **kwargs)
768
 
        Client.__del__(self, *args, **kwargs)
769
 
    
770
 
    def checker_callback(self, pid, condition, command,
771
 
                         *args, **kwargs):
772
 
        self.checker_callback_tag = None
773
 
        self.checker = None
774
 
        # Emit D-Bus signal
775
 
        self.PropertyChanged(dbus.String(u"checker_running"),
776
 
                             dbus.Boolean(False, variant_level=1))
777
 
        if os.WIFEXITED(condition):
778
 
            exitstatus = os.WEXITSTATUS(condition)
779
 
            # Emit D-Bus signal
780
 
            self.CheckerCompleted(dbus.Int16(exitstatus),
781
 
                                  dbus.Int64(condition),
782
 
                                  dbus.String(command))
783
 
        else:
784
 
            # Emit D-Bus signal
785
 
            self.CheckerCompleted(dbus.Int16(-1),
786
 
                                  dbus.Int64(condition),
787
 
                                  dbus.String(command))
788
 
        
789
 
        return Client.checker_callback(self, pid, condition, command,
790
 
                                       *args, **kwargs)
791
 
    
792
 
    def checked_ok(self, *args, **kwargs):
793
 
        r = Client.checked_ok(self, *args, **kwargs)
794
 
        # Emit D-Bus signal
795
 
        self.PropertyChanged(
796
 
            dbus.String(u"last_checked_ok"),
797
 
            (self._datetime_to_dbus(self.last_checked_ok,
798
 
                                    variant_level=1)))
799
 
        return r
800
 
    
801
 
    def start_checker(self, *args, **kwargs):
802
 
        old_checker = self.checker
803
 
        if self.checker is not None:
804
 
            old_checker_pid = self.checker.pid
805
 
        else:
806
 
            old_checker_pid = None
807
 
        r = Client.start_checker(self, *args, **kwargs)
808
 
        # Only if new checker process was started
809
 
        if (self.checker is not None
810
 
            and old_checker_pid != self.checker.pid):
811
 
            # Emit D-Bus signal
812
 
            self.CheckerStarted(self.current_checker_command)
813
 
            self.PropertyChanged(
814
 
                dbus.String(u"checker_running"),
815
 
                dbus.Boolean(True, variant_level=1))
816
 
        return r
817
 
    
818
 
    def stop_checker(self, *args, **kwargs):
819
 
        old_checker = getattr(self, u"checker", None)
820
 
        r = Client.stop_checker(self, *args, **kwargs)
821
 
        if (old_checker is not None
822
 
            and getattr(self, u"checker", None) is None):
823
 
            self.PropertyChanged(dbus.String(u"checker_running"),
824
 
                                 dbus.Boolean(False, variant_level=1))
825
 
        return r
826
 
 
827
 
    def _reset_approved(self):
828
 
        self._approved = None
829
 
        return False
830
 
    
831
 
    def approve(self, value=True):
832
 
        self.send_changedstate()
833
 
        self._approved = value
834
 
        gobject.timeout_add(self._timedelta_to_milliseconds(self.approved_duration),
835
 
                            self._reset_approved)
836
 
    
837
 
    
838
 
    ## D-Bus methods, signals & properties
839
 
    _interface = u"se.bsnet.fukt.Mandos.Client"
840
 
    
841
 
    ## Signals
842
 
    
843
 
    # CheckerCompleted - signal
844
 
    @dbus.service.signal(_interface, signature=u"nxs")
845
 
    def CheckerCompleted(self, exitcode, waitstatus, command):
846
 
        "D-Bus signal"
847
 
        pass
848
 
    
849
 
    # CheckerStarted - signal
850
 
    @dbus.service.signal(_interface, signature=u"s")
851
 
    def CheckerStarted(self, command):
852
 
        "D-Bus signal"
853
 
        pass
854
 
    
855
 
    # PropertyChanged - signal
856
 
    @dbus.service.signal(_interface, signature=u"sv")
857
 
    def PropertyChanged(self, property, value):
858
 
        "D-Bus signal"
859
 
        pass
860
 
    
861
 
    # GotSecret - signal
862
 
    # XXXTEDDY Is sent after succesfull transfer of secret from mandos-server to mandos-client
863
 
    @dbus.service.signal(_interface)
864
 
    def GotSecret(self):
865
 
        "D-Bus signal"
866
 
        pass
867
 
    
868
 
    # Rejected - signal
869
 
    @dbus.service.signal(_interface, signature=u"s")
870
 
    def Rejected(self, reason):
871
 
        "D-Bus signal"
872
 
        pass
873
 
    
874
 
    # NeedApproval - signal
875
 
    @dbus.service.signal(_interface, signature=u"db")
876
 
    def NeedApproval(self, timeout, default):
877
 
        "D-Bus signal"
878
 
        pass
879
 
    
880
 
    ## Methods
881
 
 
882
 
    # Approve - method
883
 
    @dbus.service.method(_interface, in_signature=u"b")
884
 
    def Approve(self, value):
885
 
        self.approve(value)
886
 
 
887
 
    # CheckedOK - method
888
 
    @dbus.service.method(_interface)
889
 
    def CheckedOK(self):
890
 
        return self.checked_ok()
891
 
    
892
 
    # Enable - method
893
 
    @dbus.service.method(_interface)
894
 
    def Enable(self):
895
 
        "D-Bus method"
896
 
        self.enable()
897
 
    
898
 
    # StartChecker - method
899
 
    @dbus.service.method(_interface)
900
 
    def StartChecker(self):
901
 
        "D-Bus method"
902
 
        self.start_checker()
903
 
    
904
 
    # Disable - method
905
 
    @dbus.service.method(_interface)
906
 
    def Disable(self):
907
 
        "D-Bus method"
908
 
        self.disable()
909
 
    
910
 
    # StopChecker - method
911
 
    @dbus.service.method(_interface)
912
 
    def StopChecker(self):
913
 
        self.stop_checker()
914
 
    
915
 
    ## Properties
916
 
    
917
 
    # approved_pending - property
918
 
    @dbus_service_property(_interface, signature=u"b", access=u"read")
919
 
    def approved_pending_dbus_property(self):
920
 
        return dbus.Boolean(bool(self.approvals_pending))
921
 
    
922
 
    # approved_by_default - property
923
 
    @dbus_service_property(_interface, signature=u"b",
924
 
                           access=u"readwrite")
925
 
    def approved_by_default_dbus_property(self):
926
 
        return dbus.Boolean(self.approved_by_default)
927
 
    
928
 
    # approved_delay - property
929
 
    @dbus_service_property(_interface, signature=u"t",
930
 
                           access=u"readwrite")
931
 
    def approved_delay_dbus_property(self):
932
 
        return dbus.UInt64(self.approved_delay_milliseconds())
933
 
    
934
 
    # approved_duration - property
935
 
    @dbus_service_property(_interface, signature=u"t",
936
 
                           access=u"readwrite")
937
 
    def approved_duration_dbus_property(self):
938
 
        return dbus.UInt64(self._timedelta_to_milliseconds(
939
 
                self.approved_duration))
940
 
    
941
 
    # name - property
942
 
    @dbus_service_property(_interface, signature=u"s", access=u"read")
943
 
    def name_dbus_property(self):
944
 
        return dbus.String(self.name)
945
 
    
946
 
    # fingerprint - property
947
 
    @dbus_service_property(_interface, signature=u"s", access=u"read")
948
 
    def fingerprint_dbus_property(self):
949
 
        return dbus.String(self.fingerprint)
950
 
    
951
 
    # host - property
952
 
    @dbus_service_property(_interface, signature=u"s",
953
 
                           access=u"readwrite")
954
 
    def host_dbus_property(self, value=None):
955
 
        if value is None:       # get
956
 
            return dbus.String(self.host)
957
 
        self.host = value
958
 
        # Emit D-Bus signal
959
 
        self.PropertyChanged(dbus.String(u"host"),
960
 
                             dbus.String(value, variant_level=1))
961
 
    
962
 
    # created - property
963
 
    @dbus_service_property(_interface, signature=u"s", access=u"read")
964
 
    def created_dbus_property(self):
965
 
        return dbus.String(self._datetime_to_dbus(self.created))
966
 
    
967
 
    # last_enabled - property
968
 
    @dbus_service_property(_interface, signature=u"s", access=u"read")
969
 
    def last_enabled_dbus_property(self):
970
 
        if self.last_enabled is None:
971
 
            return dbus.String(u"")
972
 
        return dbus.String(self._datetime_to_dbus(self.last_enabled))
973
 
    
974
 
    # enabled - property
975
 
    @dbus_service_property(_interface, signature=u"b",
976
 
                           access=u"readwrite")
977
 
    def enabled_dbus_property(self, value=None):
978
 
        if value is None:       # get
979
 
            return dbus.Boolean(self.enabled)
980
 
        if value:
981
 
            self.enable()
982
 
        else:
983
 
            self.disable()
984
 
    
985
 
    # last_checked_ok - property
986
 
    @dbus_service_property(_interface, signature=u"s",
987
 
                           access=u"readwrite")
988
 
    def last_checked_ok_dbus_property(self, value=None):
989
 
        if value is not None:
990
 
            self.checked_ok()
991
 
            return
 
371
    def still_valid(self):
 
372
        """Has the timeout not yet passed for this client?"""
 
373
        now = datetime.datetime.now()
992
374
        if self.last_checked_ok is None:
993
 
            return dbus.String(u"")
994
 
        return dbus.String(self._datetime_to_dbus(self
995
 
                                                  .last_checked_ok))
996
 
    
997
 
    # timeout - property
998
 
    @dbus_service_property(_interface, signature=u"t",
999
 
                           access=u"readwrite")
1000
 
    def timeout_dbus_property(self, value=None):
1001
 
        if value is None:       # get
1002
 
            return dbus.UInt64(self.timeout_milliseconds())
1003
 
        self.timeout = datetime.timedelta(0, 0, 0, value)
1004
 
        # Emit D-Bus signal
1005
 
        self.PropertyChanged(dbus.String(u"timeout"),
1006
 
                             dbus.UInt64(value, variant_level=1))
1007
 
        if getattr(self, u"disable_initiator_tag", None) is None:
1008
 
            return
1009
 
        # Reschedule timeout
1010
 
        gobject.source_remove(self.disable_initiator_tag)
1011
 
        self.disable_initiator_tag = None
1012
 
        time_to_die = (self.
1013
 
                       _timedelta_to_milliseconds((self
1014
 
                                                   .last_checked_ok
1015
 
                                                   + self.timeout)
1016
 
                                                  - datetime.datetime
1017
 
                                                  .utcnow()))
1018
 
        if time_to_die <= 0:
1019
 
            # The timeout has passed
1020
 
            self.disable()
1021
 
        else:
1022
 
            self.disable_initiator_tag = (gobject.timeout_add
1023
 
                                          (time_to_die, self.disable))
1024
 
    
1025
 
    # interval - property
1026
 
    @dbus_service_property(_interface, signature=u"t",
1027
 
                           access=u"readwrite")
1028
 
    def interval_dbus_property(self, value=None):
1029
 
        if value is None:       # get
1030
 
            return dbus.UInt64(self.interval_milliseconds())
1031
 
        self.interval = datetime.timedelta(0, 0, 0, value)
1032
 
        # Emit D-Bus signal
1033
 
        self.PropertyChanged(dbus.String(u"interval"),
1034
 
                             dbus.UInt64(value, variant_level=1))
1035
 
        if getattr(self, u"checker_initiator_tag", None) is None:
1036
 
            return
1037
 
        # Reschedule checker run
1038
 
        gobject.source_remove(self.checker_initiator_tag)
1039
 
        self.checker_initiator_tag = (gobject.timeout_add
1040
 
                                      (value, self.start_checker))
1041
 
        self.start_checker()    # Start one now, too
1042
 
 
1043
 
    # checker - property
1044
 
    @dbus_service_property(_interface, signature=u"s",
1045
 
                           access=u"readwrite")
1046
 
    def checker_dbus_property(self, value=None):
1047
 
        if value is None:       # get
1048
 
            return dbus.String(self.checker_command)
1049
 
        self.checker_command = value
1050
 
        # Emit D-Bus signal
1051
 
        self.PropertyChanged(dbus.String(u"checker"),
1052
 
                             dbus.String(self.checker_command,
1053
 
                                         variant_level=1))
1054
 
    
1055
 
    # checker_running - property
1056
 
    @dbus_service_property(_interface, signature=u"b",
1057
 
                           access=u"readwrite")
1058
 
    def checker_running_dbus_property(self, value=None):
1059
 
        if value is None:       # get
1060
 
            return dbus.Boolean(self.checker is not None)
1061
 
        if value:
1062
 
            self.start_checker()
1063
 
        else:
1064
 
            self.stop_checker()
1065
 
    
1066
 
    # object_path - property
1067
 
    @dbus_service_property(_interface, signature=u"o", access=u"read")
1068
 
    def object_path_dbus_property(self):
1069
 
        return self.dbus_object_path # is already a dbus.ObjectPath
1070
 
    
1071
 
    # secret = property
1072
 
    @dbus_service_property(_interface, signature=u"ay",
1073
 
                           access=u"write", byte_arrays=True)
1074
 
    def secret_dbus_property(self, value):
1075
 
        self.secret = str(value)
1076
 
    
1077
 
    del _interface
1078
 
 
1079
 
 
1080
 
class ProxyClient(object):
1081
 
    def __init__(self, child_pipe, fpr, address):
1082
 
        self._pipe = child_pipe
1083
 
        self._pipe.send(('init', fpr, address))
1084
 
        if not self._pipe.recv():
1085
 
            raise KeyError()
1086
 
 
1087
 
    def __getattribute__(self, name):
1088
 
        if(name == '_pipe'):
1089
 
            return super(ProxyClient, self).__getattribute__(name)
1090
 
        self._pipe.send(('getattr', name))
1091
 
        data = self._pipe.recv()
1092
 
        if data[0] == 'data':
1093
 
            return data[1]
1094
 
        if data[0] == 'function':
1095
 
            def func(*args, **kwargs):
1096
 
                self._pipe.send(('funcall', name, args, kwargs))
1097
 
                return self._pipe.recv()[1]
1098
 
            return func
1099
 
 
1100
 
    def __setattr__(self, name, value):
1101
 
        if(name == '_pipe'):
1102
 
            return super(ProxyClient, self).__setattr__(name, value)
1103
 
        self._pipe.send(('setattr', name, value))
1104
 
 
1105
 
 
1106
 
class ClientHandler(socketserver.BaseRequestHandler, object):
1107
 
    """A class to handle client connections.
1108
 
    
1109
 
    Instantiated once for each connection to handle it.
 
375
            return now < (self.created + self.timeout)
 
376
        else:
 
377
            return now < (self.last_checked_ok + self.timeout)
 
378
 
 
379
 
 
380
def peer_certificate(session):
 
381
    "Return the peer's OpenPGP certificate as a bytestring"
 
382
    # If not an OpenPGP certificate...
 
383
    if gnutls.library.functions.gnutls_certificate_type_get\
 
384
            (session._c_object) \
 
385
           != gnutls.library.constants.GNUTLS_CRT_OPENPGP:
 
386
        # ...do the normal thing
 
387
        return session.peer_certificate
 
388
    list_size = ctypes.c_uint()
 
389
    cert_list = gnutls.library.functions.gnutls_certificate_get_peers\
 
390
        (session._c_object, ctypes.byref(list_size))
 
391
    if list_size.value == 0:
 
392
        return None
 
393
    cert = cert_list[0]
 
394
    return ctypes.string_at(cert.data, cert.size)
 
395
 
 
396
 
 
397
def fingerprint(openpgp):
 
398
    "Convert an OpenPGP bytestring to a hexdigit fingerprint string"
 
399
    # New empty GnuTLS certificate
 
400
    crt = gnutls.library.types.gnutls_openpgp_crt_t()
 
401
    gnutls.library.functions.gnutls_openpgp_crt_init\
 
402
        (ctypes.byref(crt))
 
403
    # New GnuTLS "datum" with the OpenPGP public key
 
404
    datum = gnutls.library.types.gnutls_datum_t\
 
405
        (ctypes.cast(ctypes.c_char_p(openpgp),
 
406
                     ctypes.POINTER(ctypes.c_ubyte)),
 
407
         ctypes.c_uint(len(openpgp)))
 
408
    # Import the OpenPGP public key into the certificate
 
409
    ret = gnutls.library.functions.gnutls_openpgp_crt_import\
 
410
        (crt,
 
411
         ctypes.byref(datum),
 
412
         gnutls.library.constants.GNUTLS_OPENPGP_FMT_RAW)
 
413
    # New buffer for the fingerprint
 
414
    buffer = ctypes.create_string_buffer(20)
 
415
    buffer_length = ctypes.c_size_t()
 
416
    # Get the fingerprint from the certificate into the buffer
 
417
    gnutls.library.functions.gnutls_openpgp_crt_get_fingerprint\
 
418
        (crt, ctypes.byref(buffer), ctypes.byref(buffer_length))
 
419
    # Deinit the certificate
 
420
    gnutls.library.functions.gnutls_openpgp_crt_deinit(crt)
 
421
    # Convert the buffer to a Python bytestring
 
422
    fpr = ctypes.string_at(buffer, buffer_length.value)
 
423
    # Convert the bytestring to hexadecimal notation
 
424
    hex_fpr = u''.join(u"%02X" % ord(char) for char in fpr)
 
425
    return hex_fpr
 
426
 
 
427
 
 
428
class tcp_handler(SocketServer.BaseRequestHandler, object):
 
429
    """A TCP request handler class.
 
430
    Instantiated by IPv6_TCPServer for each request to handle it.
1110
431
    Note: This will run in its own forked process."""
1111
432
    
1112
433
    def handle(self):
1113
 
        with contextlib.closing(self.server.child_pipe) as child_pipe:
1114
 
            logger.info(u"TCP connection from: %s",
1115
 
                        unicode(self.client_address))
1116
 
            logger.debug(u"Pipe FD: %d",
1117
 
                         self.server.child_pipe.fileno())
1118
 
 
1119
 
            session = (gnutls.connection
1120
 
                       .ClientSession(self.request,
1121
 
                                      gnutls.connection
1122
 
                                      .X509Credentials()))
1123
 
 
1124
 
            # Note: gnutls.connection.X509Credentials is really a
1125
 
            # generic GnuTLS certificate credentials object so long as
1126
 
            # no X.509 keys are added to it.  Therefore, we can use it
1127
 
            # here despite using OpenPGP certificates.
1128
 
 
1129
 
            #priority = u':'.join((u"NONE", u"+VERS-TLS1.1",
1130
 
            #                      u"+AES-256-CBC", u"+SHA1",
1131
 
            #                      u"+COMP-NULL", u"+CTYPE-OPENPGP",
1132
 
            #                      u"+DHE-DSS"))
1133
 
            # Use a fallback default, since this MUST be set.
1134
 
            priority = self.server.gnutls_priority
1135
 
            if priority is None:
1136
 
                priority = u"NORMAL"
1137
 
            (gnutls.library.functions
1138
 
             .gnutls_priority_set_direct(session._c_object,
1139
 
                                         priority, None))
1140
 
 
1141
 
            # Start communication using the Mandos protocol
1142
 
            # Get protocol number
1143
 
            line = self.request.makefile().readline()
1144
 
            logger.debug(u"Protocol version: %r", line)
1145
 
            try:
1146
 
                if int(line.strip().split()[0]) > 1:
1147
 
                    raise RuntimeError
1148
 
            except (ValueError, IndexError, RuntimeError), error:
1149
 
                logger.error(u"Unknown protocol version: %s", error)
1150
 
                return
1151
 
 
1152
 
            # Start GnuTLS connection
1153
 
            try:
1154
 
                session.handshake()
1155
 
            except gnutls.errors.GNUTLSError, error:
1156
 
                logger.warning(u"Handshake failed: %s", error)
1157
 
                # Do not run session.bye() here: the session is not
1158
 
                # established.  Just abandon the request.
1159
 
                return
1160
 
            logger.debug(u"Handshake succeeded")
1161
 
 
1162
 
            approval_required = False
1163
 
            try:
1164
 
                try:
1165
 
                    fpr = self.fingerprint(self.peer_certificate
1166
 
                                           (session))
1167
 
                except (TypeError, gnutls.errors.GNUTLSError), error:
1168
 
                    logger.warning(u"Bad certificate: %s", error)
1169
 
                    return
1170
 
                logger.debug(u"Fingerprint: %s", fpr)
1171
 
 
1172
 
                try:
1173
 
                    client = ProxyClient(child_pipe, fpr,
1174
 
                                         self.client_address)
1175
 
                except KeyError:
1176
 
                    return
1177
 
                
1178
 
                if client.approved_delay:
1179
 
                    delay = client.approved_delay
1180
 
                    client.approvals_pending += 1
1181
 
                    approval_required = True
1182
 
                
1183
 
                while True:
1184
 
                    if not client.enabled:
1185
 
                        logger.warning(u"Client %s is disabled",
1186
 
                                       client.name)
1187
 
                        if self.server.use_dbus:
1188
 
                            # Emit D-Bus signal
1189
 
                            client.Rejected("Disabled")                    
1190
 
                        return
1191
 
                    
1192
 
                    if client._approved or not client.approved_delay:
1193
 
                        #We are approved or approval is disabled
1194
 
                        break
1195
 
                    elif client._approved is None:
1196
 
                        logger.info(u"Client %s need approval",
1197
 
                                    client.name)
1198
 
                        if self.server.use_dbus:
1199
 
                            # Emit D-Bus signal
1200
 
                            client.NeedApproval(
1201
 
                                client.approved_delay_milliseconds(),
1202
 
                                client.approved_by_default)
1203
 
                    else:
1204
 
                        logger.warning(u"Client %s was not approved",
1205
 
                                       client.name)
1206
 
                        if self.server.use_dbus:
1207
 
                            # Emit D-Bus signal
1208
 
                            client.Rejected("Disapproved")
1209
 
                        return
1210
 
                    
1211
 
                    #wait until timeout or approved
1212
 
                    #x = float(client._timedelta_to_milliseconds(delay))
1213
 
                    time = datetime.datetime.now()
1214
 
                    client.changedstate.acquire()
1215
 
                    client.changedstate.wait(float(client._timedelta_to_milliseconds(delay) / 1000))
1216
 
                    client.changedstate.release()
1217
 
                    time2 = datetime.datetime.now()
1218
 
                    if (time2 - time) >= delay:
1219
 
                        if not client.approved_by_default:
1220
 
                            logger.warning("Client %s timed out while"
1221
 
                                           " waiting for approval",
1222
 
                                           client.name)
1223
 
                            if self.server.use_dbus:
1224
 
                                # Emit D-Bus signal
1225
 
                                client.Rejected("Time out")
1226
 
                            return
1227
 
                        else:
1228
 
                            break
1229
 
                    else:
1230
 
                        delay -= time2 - time
1231
 
                
1232
 
                sent_size = 0
1233
 
                while sent_size < len(client.secret):
1234
 
                    # XXX handle session exception
1235
 
                    sent = session.send(client.secret[sent_size:])
1236
 
                    logger.debug(u"Sent: %d, remaining: %d",
1237
 
                                 sent, len(client.secret)
1238
 
                                 - (sent_size + sent))
1239
 
                    sent_size += sent
1240
 
 
1241
 
                logger.info(u"Sending secret to %s", client.name)
1242
 
                # bump the timeout as if seen
1243
 
                client.checked_ok()
1244
 
                if self.server.use_dbus:
1245
 
                    # Emit D-Bus signal
1246
 
                    client.GotSecret()
1247
 
            
1248
 
            finally:
1249
 
                if approval_required:
1250
 
                    client.approvals_pending -= 1
1251
 
                session.bye()
1252
 
    
1253
 
    @staticmethod
1254
 
    def peer_certificate(session):
1255
 
        "Return the peer's OpenPGP certificate as a bytestring"
1256
 
        # If not an OpenPGP certificate...
1257
 
        if (gnutls.library.functions
1258
 
            .gnutls_certificate_type_get(session._c_object)
1259
 
            != gnutls.library.constants.GNUTLS_CRT_OPENPGP):
1260
 
            # ...do the normal thing
1261
 
            return session.peer_certificate
1262
 
        list_size = ctypes.c_uint(1)
1263
 
        cert_list = (gnutls.library.functions
1264
 
                     .gnutls_certificate_get_peers
1265
 
                     (session._c_object, ctypes.byref(list_size)))
1266
 
        if not bool(cert_list) and list_size.value != 0:
1267
 
            raise gnutls.errors.GNUTLSError(u"error getting peer"
1268
 
                                            u" certificate")
1269
 
        if list_size.value == 0:
1270
 
            return None
1271
 
        cert = cert_list[0]
1272
 
        return ctypes.string_at(cert.data, cert.size)
1273
 
    
1274
 
    @staticmethod
1275
 
    def fingerprint(openpgp):
1276
 
        "Convert an OpenPGP bytestring to a hexdigit fingerprint"
1277
 
        # New GnuTLS "datum" with the OpenPGP public key
1278
 
        datum = (gnutls.library.types
1279
 
                 .gnutls_datum_t(ctypes.cast(ctypes.c_char_p(openpgp),
1280
 
                                             ctypes.POINTER
1281
 
                                             (ctypes.c_ubyte)),
1282
 
                                 ctypes.c_uint(len(openpgp))))
1283
 
        # New empty GnuTLS certificate
1284
 
        crt = gnutls.library.types.gnutls_openpgp_crt_t()
1285
 
        (gnutls.library.functions
1286
 
         .gnutls_openpgp_crt_init(ctypes.byref(crt)))
1287
 
        # Import the OpenPGP public key into the certificate
1288
 
        (gnutls.library.functions
1289
 
         .gnutls_openpgp_crt_import(crt, ctypes.byref(datum),
1290
 
                                    gnutls.library.constants
1291
 
                                    .GNUTLS_OPENPGP_FMT_RAW))
1292
 
        # Verify the self signature in the key
1293
 
        crtverify = ctypes.c_uint()
1294
 
        (gnutls.library.functions
1295
 
         .gnutls_openpgp_crt_verify_self(crt, 0,
1296
 
                                         ctypes.byref(crtverify)))
1297
 
        if crtverify.value != 0:
1298
 
            gnutls.library.functions.gnutls_openpgp_crt_deinit(crt)
1299
 
            raise (gnutls.errors.CertificateSecurityError
1300
 
                   (u"Verify failed"))
1301
 
        # New buffer for the fingerprint
1302
 
        buf = ctypes.create_string_buffer(20)
1303
 
        buf_len = ctypes.c_size_t()
1304
 
        # Get the fingerprint from the certificate into the buffer
1305
 
        (gnutls.library.functions
1306
 
         .gnutls_openpgp_crt_get_fingerprint(crt, ctypes.byref(buf),
1307
 
                                             ctypes.byref(buf_len)))
1308
 
        # Deinit the certificate
1309
 
        gnutls.library.functions.gnutls_openpgp_crt_deinit(crt)
1310
 
        # Convert the buffer to a Python bytestring
1311
 
        fpr = ctypes.string_at(buf, buf_len.value)
1312
 
        # Convert the bytestring to hexadecimal notation
1313
 
        hex_fpr = u''.join(u"%02X" % ord(char) for char in fpr)
1314
 
        return hex_fpr
1315
 
 
1316
 
 
1317
 
class MultiprocessingMixIn(object):
1318
 
    """Like socketserver.ThreadingMixIn, but with multiprocessing"""
1319
 
    def sub_process_main(self, request, address):
1320
 
        try:
1321
 
            self.finish_request(request, address)
1322
 
        except:
1323
 
            self.handle_error(request, address)
1324
 
        self.close_request(request)
1325
 
            
1326
 
    def process_request(self, request, address):
1327
 
        """Start a new process to process the request."""
1328
 
        multiprocessing.Process(target = self.sub_process_main,
1329
 
                                args = (request, address)).start()
1330
 
 
1331
 
class MultiprocessingMixInWithPipe(MultiprocessingMixIn, object):
1332
 
    """ adds a pipe to the MixIn """
1333
 
    def process_request(self, request, client_address):
1334
 
        """Overrides and wraps the original process_request().
1335
 
        
1336
 
        This function creates a new pipe in self.pipe
1337
 
        """
1338
 
        parent_pipe, self.child_pipe = multiprocessing.Pipe()
1339
 
 
1340
 
        super(MultiprocessingMixInWithPipe,
1341
 
              self).process_request(request, client_address)
1342
 
        self.child_pipe.close()
1343
 
        self.add_pipe(parent_pipe)
1344
 
 
1345
 
    def add_pipe(self, parent_pipe):
1346
 
        """Dummy function; override as necessary"""
1347
 
        pass
1348
 
 
1349
 
class IPv6_TCPServer(MultiprocessingMixInWithPipe,
1350
 
                     socketserver.TCPServer, object):
1351
 
    """IPv6-capable TCP server.  Accepts 'None' as address and/or port
1352
 
    
 
434
        logger.debug(u"TCP connection from: %s",
 
435
                     unicode(self.client_address))
 
436
        session = gnutls.connection.ClientSession\
 
437
                  (self.request, gnutls.connection.X509Credentials())
 
438
        # Note: gnutls.connection.X509Credentials is really a generic
 
439
        # GnuTLS certificate credentials object so long as no X.509
 
440
        # keys are added to it.  Therefore, we can use it here despite
 
441
        # using OpenPGP certificates.
 
442
        
 
443
        #priority = ':'.join(("NONE", "+VERS-TLS1.1", "+AES-256-CBC",
 
444
        #                "+SHA1", "+COMP-NULL", "+CTYPE-OPENPGP",
 
445
        #                "+DHE-DSS"))
 
446
        priority = "NORMAL"             # Fallback default, since this
 
447
                                        # MUST be set.
 
448
        if self.server.settings["priority"]:
 
449
            priority = self.server.settings["priority"]
 
450
        gnutls.library.functions.gnutls_priority_set_direct\
 
451
            (session._c_object, priority, None);
 
452
        
 
453
        try:
 
454
            session.handshake()
 
455
        except gnutls.errors.GNUTLSError, error:
 
456
            logger.debug(u"Handshake failed: %s", error)
 
457
            # Do not run session.bye() here: the session is not
 
458
            # established.  Just abandon the request.
 
459
            return
 
460
        try:
 
461
            fpr = fingerprint(peer_certificate(session))
 
462
        except (TypeError, gnutls.errors.GNUTLSError), error:
 
463
            logger.debug(u"Bad certificate: %s", error)
 
464
            session.bye()
 
465
            return
 
466
        logger.debug(u"Fingerprint: %s", fpr)
 
467
        client = None
 
468
        for c in self.server.clients:
 
469
            if c.fingerprint == fpr:
 
470
                client = c
 
471
                break
 
472
        if not client:
 
473
            logger.debug(u"Client not found for fingerprint: %s", fpr)
 
474
            session.bye()
 
475
            return
 
476
        # Have to check if client.still_valid(), since it is possible
 
477
        # that the client timed out while establishing the GnuTLS
 
478
        # session.
 
479
        if not client.still_valid():
 
480
            logger.debug(u"Client %(name)s is invalid", vars(client))
 
481
            session.bye()
 
482
            return
 
483
        sent_size = 0
 
484
        while sent_size < len(client.secret):
 
485
            sent = session.send(client.secret[sent_size:])
 
486
            logger.debug(u"Sent: %d, remaining: %d",
 
487
                         sent, len(client.secret)
 
488
                         - (sent_size + sent))
 
489
            sent_size += sent
 
490
        session.bye()
 
491
 
 
492
 
 
493
class IPv6_TCPServer(SocketServer.ForkingTCPServer, object):
 
494
    """IPv6 TCP server.  Accepts 'None' as address and/or port.
1353
495
    Attributes:
1354
 
        enabled:        Boolean; whether this server is activated yet
1355
 
        interface:      None or a network interface name (string)
1356
 
        use_ipv6:       Boolean; to use IPv6 or not
 
496
        settings:       Server settings
 
497
        clients:        Set() of Client objects
1357
498
    """
1358
 
    def __init__(self, server_address, RequestHandlerClass,
1359
 
                 interface=None, use_ipv6=True):
1360
 
        self.interface = interface
1361
 
        if use_ipv6:
1362
 
            self.address_family = socket.AF_INET6
1363
 
        socketserver.TCPServer.__init__(self, server_address,
1364
 
                                        RequestHandlerClass)
 
499
    address_family = socket.AF_INET6
 
500
    def __init__(self, *args, **kwargs):
 
501
        if "settings" in kwargs:
 
502
            self.settings = kwargs["settings"]
 
503
            del kwargs["settings"]
 
504
        if "clients" in kwargs:
 
505
            self.clients = kwargs["clients"]
 
506
            del kwargs["clients"]
 
507
        return super(type(self), self).__init__(*args, **kwargs)
1365
508
    def server_bind(self):
1366
509
        """This overrides the normal server_bind() function
1367
510
        to bind to an interface if one was specified, and also NOT to
1368
511
        bind to an address or port if they were not specified."""
1369
 
        if self.interface is not None:
1370
 
            if SO_BINDTODEVICE is None:
1371
 
                logger.error(u"SO_BINDTODEVICE does not exist;"
1372
 
                             u" cannot bind to interface %s",
1373
 
                             self.interface)
1374
 
            else:
1375
 
                try:
1376
 
                    self.socket.setsockopt(socket.SOL_SOCKET,
1377
 
                                           SO_BINDTODEVICE,
1378
 
                                           str(self.interface
1379
 
                                               + u'\0'))
1380
 
                except socket.error, error:
1381
 
                    if error[0] == errno.EPERM:
1382
 
                        logger.error(u"No permission to"
1383
 
                                     u" bind to interface %s",
1384
 
                                     self.interface)
1385
 
                    elif error[0] == errno.ENOPROTOOPT:
1386
 
                        logger.error(u"SO_BINDTODEVICE not available;"
1387
 
                                     u" cannot bind to interface %s",
1388
 
                                     self.interface)
1389
 
                    else:
1390
 
                        raise
 
512
        if self.settings["interface"]:
 
513
            # 25 is from /usr/include/asm-i486/socket.h
 
514
            SO_BINDTODEVICE = getattr(socket, "SO_BINDTODEVICE", 25)
 
515
            try:
 
516
                self.socket.setsockopt(socket.SOL_SOCKET,
 
517
                                       SO_BINDTODEVICE,
 
518
                                       self.settings["interface"])
 
519
            except socket.error, error:
 
520
                if error[0] == errno.EPERM:
 
521
                    logger.warning(u"No permission to"
 
522
                                   u" bind to interface %s",
 
523
                                   self.settings["interface"])
 
524
                else:
 
525
                    raise error
1391
526
        # Only bind(2) the socket if we really need to.
1392
527
        if self.server_address[0] or self.server_address[1]:
1393
528
            if not self.server_address[0]:
1394
 
                if self.address_family == socket.AF_INET6:
1395
 
                    any_address = u"::" # in6addr_any
1396
 
                else:
1397
 
                    any_address = socket.INADDR_ANY
1398
 
                self.server_address = (any_address,
 
529
                in6addr_any = "::"
 
530
                self.server_address = (in6addr_any,
1399
531
                                       self.server_address[1])
1400
 
            elif not self.server_address[1]:
 
532
            elif self.server_address[1] is None:
1401
533
                self.server_address = (self.server_address[0],
1402
534
                                       0)
1403
 
#                 if self.interface:
1404
 
#                     self.server_address = (self.server_address[0],
1405
 
#                                            0, # port
1406
 
#                                            0, # flowinfo
1407
 
#                                            if_nametoindex
1408
 
#                                            (self.interface))
1409
 
            return socketserver.TCPServer.server_bind(self)
1410
 
 
1411
 
 
1412
 
class MandosServer(IPv6_TCPServer):
1413
 
    """Mandos server.
1414
 
    
1415
 
    Attributes:
1416
 
        clients:        set of Client objects
1417
 
        gnutls_priority GnuTLS priority string
1418
 
        use_dbus:       Boolean; to emit D-Bus signals or not
1419
 
    
1420
 
    Assumes a gobject.MainLoop event loop.
1421
 
    """
1422
 
    def __init__(self, server_address, RequestHandlerClass,
1423
 
                 interface=None, use_ipv6=True, clients=None,
1424
 
                 gnutls_priority=None, use_dbus=True):
1425
 
        self.enabled = False
1426
 
        self.clients = clients
1427
 
        if self.clients is None:
1428
 
            self.clients = set()
1429
 
        self.use_dbus = use_dbus
1430
 
        self.gnutls_priority = gnutls_priority
1431
 
        IPv6_TCPServer.__init__(self, server_address,
1432
 
                                RequestHandlerClass,
1433
 
                                interface = interface,
1434
 
                                use_ipv6 = use_ipv6)
1435
 
    def server_activate(self):
1436
 
        if self.enabled:
1437
 
            return socketserver.TCPServer.server_activate(self)
1438
 
    def enable(self):
1439
 
        self.enabled = True
1440
 
    def add_pipe(self, parent_pipe):
1441
 
        # Call "handle_ipc" for both data and EOF events
1442
 
        gobject.io_add_watch(parent_pipe.fileno(),
1443
 
                             gobject.IO_IN | gobject.IO_HUP,
1444
 
                             functools.partial(self.handle_ipc,
1445
 
                                               parent_pipe = parent_pipe))
1446
 
        
1447
 
    def handle_ipc(self, source, condition, parent_pipe=None,
1448
 
                   client_object=None):
1449
 
        condition_names = {
1450
 
            gobject.IO_IN: u"IN",   # There is data to read.
1451
 
            gobject.IO_OUT: u"OUT", # Data can be written (without
1452
 
                                    # blocking).
1453
 
            gobject.IO_PRI: u"PRI", # There is urgent data to read.
1454
 
            gobject.IO_ERR: u"ERR", # Error condition.
1455
 
            gobject.IO_HUP: u"HUP"  # Hung up (the connection has been
1456
 
                                    # broken, usually for pipes and
1457
 
                                    # sockets).
1458
 
            }
1459
 
        conditions_string = ' | '.join(name
1460
 
                                       for cond, name in
1461
 
                                       condition_names.iteritems()
1462
 
                                       if cond & condition)
1463
 
        logger.debug(u"Handling IPC: FD = %d, condition = %s", source,
1464
 
                     conditions_string)
1465
 
 
1466
 
        # XXXTEDDY error or the other end of multiprocessing.Pipe has closed
1467
 
        if condition & gobject.IO_HUP or condition & gobject.IO_ERR:
1468
 
            return False
1469
 
        
1470
 
        # Read a request from the child
1471
 
        request = parent_pipe.recv()
1472
 
        logger.debug(u"IPC request: %s", repr(request))
1473
 
        command = request[0]
1474
 
        
1475
 
        if command == 'init':
1476
 
            fpr = request[1]
1477
 
            address = request[2]
1478
 
            
1479
 
            for c in self.clients:
1480
 
                if c.fingerprint == fpr:
1481
 
                    client = c
1482
 
                    break
1483
 
            else:
1484
 
                logger.warning(u"Client not found for fingerprint: %s, ad"
1485
 
                               u"dress: %s", fpr, address)
1486
 
                if self.use_dbus:
1487
 
                    # Emit D-Bus signal
1488
 
                    mandos_dbus_service.ClientNotFound(fpr, address)
1489
 
                parent_pipe.send(False)
1490
 
                return False
1491
 
            
1492
 
            gobject.io_add_watch(parent_pipe.fileno(),
1493
 
                                 gobject.IO_IN | gobject.IO_HUP,
1494
 
                                 functools.partial(self.handle_ipc,
1495
 
                                                   parent_pipe = parent_pipe,
1496
 
                                                   client_object = client))
1497
 
            parent_pipe.send(True)
1498
 
            # remove the old hook in favor of the new above hook on same fileno
1499
 
            return False
1500
 
        if command == 'funcall':
1501
 
            funcname = request[1]
1502
 
            args = request[2]
1503
 
            kwargs = request[3]
1504
 
            
1505
 
            parent_pipe.send(('data', getattr(client_object, funcname)(*args, **kwargs)))
1506
 
 
1507
 
        if command == 'getattr':
1508
 
            attrname = request[1]
1509
 
            if callable(client_object.__getattribute__(attrname)):
1510
 
                parent_pipe.send(('function',))
1511
 
            else:
1512
 
                parent_pipe.send(('data', client_object.__getattribute__(attrname)))
1513
 
        
1514
 
        if command == 'setattr':
1515
 
            attrname = request[1]
1516
 
            value = request[2]
1517
 
            setattr(client_object, attrname, value)
1518
 
 
1519
 
        return True
 
535
            return super(type(self), self).server_bind()
1520
536
 
1521
537
 
1522
538
def string_to_delta(interval):
1523
539
    """Parse a string and return a datetime.timedelta
1524
 
    
1525
 
    >>> string_to_delta(u'7d')
 
540
 
 
541
    >>> string_to_delta('7d')
1526
542
    datetime.timedelta(7)
1527
 
    >>> string_to_delta(u'60s')
 
543
    >>> string_to_delta('60s')
1528
544
    datetime.timedelta(0, 60)
1529
 
    >>> string_to_delta(u'60m')
 
545
    >>> string_to_delta('60m')
1530
546
    datetime.timedelta(0, 3600)
1531
 
    >>> string_to_delta(u'24h')
 
547
    >>> string_to_delta('24h')
1532
548
    datetime.timedelta(1)
1533
549
    >>> string_to_delta(u'1w')
1534
550
    datetime.timedelta(7)
1535
 
    >>> string_to_delta(u'5m 30s')
1536
 
    datetime.timedelta(0, 330)
1537
551
    """
1538
 
    timevalue = datetime.timedelta(0)
1539
 
    for s in interval.split():
1540
 
        try:
1541
 
            suffix = unicode(s[-1])
1542
 
            value = int(s[:-1])
1543
 
            if suffix == u"d":
1544
 
                delta = datetime.timedelta(value)
1545
 
            elif suffix == u"s":
1546
 
                delta = datetime.timedelta(0, value)
1547
 
            elif suffix == u"m":
1548
 
                delta = datetime.timedelta(0, 0, 0, 0, value)
1549
 
            elif suffix == u"h":
1550
 
                delta = datetime.timedelta(0, 0, 0, 0, 0, value)
1551
 
            elif suffix == u"w":
1552
 
                delta = datetime.timedelta(0, 0, 0, 0, 0, 0, value)
1553
 
            else:
1554
 
                raise ValueError(u"Unknown suffix %r" % suffix)
1555
 
        except (ValueError, IndexError), e:
1556
 
            raise ValueError(e.message)
1557
 
        timevalue += delta
1558
 
    return timevalue
1559
 
 
1560
 
 
1561
 
def if_nametoindex(interface):
1562
 
    """Call the C function if_nametoindex(), or equivalent
 
552
    try:
 
553
        suffix=unicode(interval[-1])
 
554
        value=int(interval[:-1])
 
555
        if suffix == u"d":
 
556
            delta = datetime.timedelta(value)
 
557
        elif suffix == u"s":
 
558
            delta = datetime.timedelta(0, value)
 
559
        elif suffix == u"m":
 
560
            delta = datetime.timedelta(0, 0, 0, 0, value)
 
561
        elif suffix == u"h":
 
562
            delta = datetime.timedelta(0, 0, 0, 0, 0, value)
 
563
        elif suffix == u"w":
 
564
            delta = datetime.timedelta(0, 0, 0, 0, 0, 0, value)
 
565
        else:
 
566
            raise ValueError
 
567
    except (ValueError, IndexError):
 
568
        raise ValueError
 
569
    return delta
 
570
 
 
571
 
 
572
def server_state_changed(state):
 
573
    """Derived from the Avahi example code"""
 
574
    if state == avahi.SERVER_COLLISION:
 
575
        logger.warning(u"Server name collision")
 
576
        service.remove()
 
577
    elif state == avahi.SERVER_RUNNING:
 
578
        service.add()
 
579
 
 
580
 
 
581
def entry_group_state_changed(state, error):
 
582
    """Derived from the Avahi example code"""
 
583
    logger.debug(u"state change: %i", state)
1563
584
    
1564
 
    Note: This function cannot accept a unicode string."""
1565
 
    global if_nametoindex
 
585
    if state == avahi.ENTRY_GROUP_ESTABLISHED:
 
586
        logger.debug(u"Service established.")
 
587
    elif state == avahi.ENTRY_GROUP_COLLISION:
 
588
        logger.warning(u"Service name collision.")
 
589
        service.rename()
 
590
    elif state == avahi.ENTRY_GROUP_FAILURE:
 
591
        logger.critical(u"Error in group state changed %s",
 
592
                        unicode(error))
 
593
        raise AvahiGroupError("State changed: %s", str(error))
 
594
 
 
595
def if_nametoindex(interface, _func=[None]):
 
596
    """Call the C function if_nametoindex(), or equivalent"""
 
597
    if _func[0] is not None:
 
598
        return _func[0](interface)
1566
599
    try:
1567
 
        if_nametoindex = (ctypes.cdll.LoadLibrary
1568
 
                          (ctypes.util.find_library(u"c"))
1569
 
                          .if_nametoindex)
 
600
        if "ctypes.util" not in sys.modules:
 
601
            import ctypes.util
 
602
        while True:
 
603
            try:
 
604
                libc = ctypes.cdll.LoadLibrary\
 
605
                       (ctypes.util.find_library("c"))
 
606
                _func[0] = libc.if_nametoindex
 
607
                return _func[0](interface)
 
608
            except IOError, e:
 
609
                if e != errno.EINTR:
 
610
                    raise
1570
611
    except (OSError, AttributeError):
1571
 
        logger.warning(u"Doing if_nametoindex the hard way")
1572
 
        def if_nametoindex(interface):
 
612
        if "struct" not in sys.modules:
 
613
            import struct
 
614
        if "fcntl" not in sys.modules:
 
615
            import fcntl
 
616
        def the_hard_way(interface):
1573
617
            "Get an interface index the hard way, i.e. using fcntl()"
1574
618
            SIOCGIFINDEX = 0x8933  # From /usr/include/linux/sockios.h
1575
 
            with contextlib.closing(socket.socket()) as s:
1576
 
                ifreq = fcntl.ioctl(s, SIOCGIFINDEX,
1577
 
                                    struct.pack(str(u"16s16x"),
1578
 
                                                interface))
1579
 
            interface_index = struct.unpack(str(u"I"),
1580
 
                                            ifreq[16:20])[0]
 
619
            s = socket.socket()
 
620
            ifreq = fcntl.ioctl(s, SIOCGIFINDEX,
 
621
                                struct.pack("16s16x", interface))
 
622
            s.close()
 
623
            interface_index = struct.unpack("I", ifreq[16:20])[0]
1581
624
            return interface_index
1582
 
    return if_nametoindex(interface)
1583
 
 
1584
 
 
1585
 
def daemon(nochdir = False, noclose = False):
 
625
        _func[0] = the_hard_way
 
626
        return _func[0](interface)
 
627
 
 
628
 
 
629
def daemon(nochdir, noclose):
1586
630
    """See daemon(3).  Standard BSD Unix function.
1587
 
    
1588
631
    This should really exist as os.daemon, but it doesn't (yet)."""
1589
632
    if os.fork():
1590
633
        sys.exit()
1591
634
    os.setsid()
1592
635
    if not nochdir:
1593
 
        os.chdir(u"/")
1594
 
    if os.fork():
1595
 
        sys.exit()
 
636
        os.chdir("/")
1596
637
    if not noclose:
1597
638
        # Close all standard open file descriptors
1598
639
        null = os.open(os.path.devnull, os.O_NOCTTY | os.O_RDWR)
1599
640
        if not stat.S_ISCHR(os.fstat(null).st_mode):
1600
641
            raise OSError(errno.ENODEV,
1601
 
                          u"%s not a character device"
1602
 
                          % os.path.devnull)
 
642
                          "/dev/null not a character device")
1603
643
        os.dup2(null, sys.stdin.fileno())
1604
644
        os.dup2(null, sys.stdout.fileno())
1605
645
        os.dup2(null, sys.stderr.fileno())
1608
648
 
1609
649
 
1610
650
def main():
1611
 
    
1612
 
    ##################################################################
1613
 
    # Parsing of options, both command line and config file
1614
 
    
1615
 
    parser = optparse.OptionParser(version = "%%prog %s" % version)
1616
 
    parser.add_option("-i", u"--interface", type=u"string",
1617
 
                      metavar="IF", help=u"Bind to interface IF")
1618
 
    parser.add_option("-a", u"--address", type=u"string",
1619
 
                      help=u"Address to listen for requests on")
1620
 
    parser.add_option("-p", u"--port", type=u"int",
1621
 
                      help=u"Port number to receive requests on")
1622
 
    parser.add_option("--check", action=u"store_true",
1623
 
                      help=u"Run self-test")
1624
 
    parser.add_option("--debug", action=u"store_true",
1625
 
                      help=u"Debug mode; run in foreground and log to"
1626
 
                      u" terminal")
1627
 
    parser.add_option("--priority", type=u"string", help=u"GnuTLS"
1628
 
                      u" priority string (see GnuTLS documentation)")
1629
 
    parser.add_option("--servicename", type=u"string",
1630
 
                      metavar=u"NAME", help=u"Zeroconf service name")
1631
 
    parser.add_option("--configdir", type=u"string",
1632
 
                      default=u"/etc/mandos", metavar=u"DIR",
1633
 
                      help=u"Directory to search for configuration"
1634
 
                      u" files")
1635
 
    parser.add_option("--no-dbus", action=u"store_false",
1636
 
                      dest=u"use_dbus", help=u"Do not provide D-Bus"
1637
 
                      u" system bus interface")
1638
 
    parser.add_option("--no-ipv6", action=u"store_false",
1639
 
                      dest=u"use_ipv6", help=u"Do not use IPv6")
1640
 
    options = parser.parse_args()[0]
 
651
    global main_loop_started
 
652
    main_loop_started = False
 
653
    
 
654
    parser = OptionParser()
 
655
    parser.add_option("-i", "--interface", type="string",
 
656
                      metavar="IF", help="Bind to interface IF")
 
657
    parser.add_option("-a", "--address", type="string",
 
658
                      help="Address to listen for requests on")
 
659
    parser.add_option("-p", "--port", type="int",
 
660
                      help="Port number to receive requests on")
 
661
    parser.add_option("--check", action="store_true", default=False,
 
662
                      help="Run self-test")
 
663
    parser.add_option("--debug", action="store_true", default=False,
 
664
                      help="Debug mode; run in foreground and log to"
 
665
                      " terminal")
 
666
    parser.add_option("--priority", type="string", help="GnuTLS"
 
667
                      " priority string (see GnuTLS documentation)")
 
668
    parser.add_option("--servicename", type="string", metavar="NAME",
 
669
                      help="Zeroconf service name")
 
670
    parser.add_option("--configdir", type="string",
 
671
                      default="/etc/mandos", metavar="DIR",
 
672
                      help="Directory to search for configuration"
 
673
                      " files")
 
674
    (options, args) = parser.parse_args()
1641
675
    
1642
676
    if options.check:
1643
677
        import doctest
1645
679
        sys.exit()
1646
680
    
1647
681
    # Default values for config file for server-global settings
1648
 
    server_defaults = { u"interface": u"",
1649
 
                        u"address": u"",
1650
 
                        u"port": u"",
1651
 
                        u"debug": u"False",
1652
 
                        u"priority":
1653
 
                        u"SECURE256:!CTYPE-X.509:+CTYPE-OPENPGP",
1654
 
                        u"servicename": u"Mandos",
1655
 
                        u"use_dbus": u"True",
1656
 
                        u"use_ipv6": u"True",
 
682
    server_defaults = { "interface": "",
 
683
                        "address": "",
 
684
                        "port": "",
 
685
                        "debug": "False",
 
686
                        "priority":
 
687
                        "SECURE256:!CTYPE-X.509:+CTYPE-OPENPGP",
 
688
                        "servicename": "Mandos",
1657
689
                        }
1658
690
    
1659
691
    # Parse config file for server-global settings
1660
 
    server_config = configparser.SafeConfigParser(server_defaults)
 
692
    server_config = ConfigParser.SafeConfigParser(server_defaults)
1661
693
    del server_defaults
1662
 
    server_config.read(os.path.join(options.configdir,
1663
 
                                    u"mandos.conf"))
 
694
    server_config.read(os.path.join(options.configdir, "server.conf"))
 
695
    server_section = "server"
1664
696
    # Convert the SafeConfigParser object to a dict
1665
 
    server_settings = server_config.defaults()
1666
 
    # Use the appropriate methods on the non-string config options
1667
 
    for option in (u"debug", u"use_dbus", u"use_ipv6"):
1668
 
        server_settings[option] = server_config.getboolean(u"DEFAULT",
1669
 
                                                           option)
1670
 
    if server_settings["port"]:
1671
 
        server_settings["port"] = server_config.getint(u"DEFAULT",
1672
 
                                                       u"port")
 
697
    server_settings = dict(server_config.items(server_section))
 
698
    # Use getboolean on the boolean config option
 
699
    server_settings["debug"] = server_config.getboolean\
 
700
                               (server_section, "debug")
1673
701
    del server_config
1674
702
    
1675
703
    # Override the settings from the config file with command line
1676
704
    # options, if set.
1677
 
    for option in (u"interface", u"address", u"port", u"debug",
1678
 
                   u"priority", u"servicename", u"configdir",
1679
 
                   u"use_dbus", u"use_ipv6"):
 
705
    for option in ("interface", "address", "port", "debug",
 
706
                   "priority", "servicename", "configdir"):
1680
707
        value = getattr(options, option)
1681
708
        if value is not None:
1682
709
            server_settings[option] = value
1683
710
    del options
1684
 
    # Force all strings to be unicode
1685
 
    for option in server_settings.keys():
1686
 
        if type(server_settings[option]) is str:
1687
 
            server_settings[option] = unicode(server_settings[option])
1688
711
    # Now we have our good server settings in "server_settings"
1689
712
    
1690
 
    ##################################################################
1691
 
    
1692
 
    # For convenience
1693
 
    debug = server_settings[u"debug"]
1694
 
    use_dbus = server_settings[u"use_dbus"]
1695
 
    use_ipv6 = server_settings[u"use_ipv6"]
1696
 
    
1697
 
    if not debug:
1698
 
        syslogger.setLevel(logging.WARNING)
1699
 
        console.setLevel(logging.WARNING)
1700
 
    
1701
 
    if server_settings[u"servicename"] != u"Mandos":
1702
 
        syslogger.setFormatter(logging.Formatter
1703
 
                               (u'Mandos (%s) [%%(process)d]:'
1704
 
                                u' %%(levelname)s: %%(message)s'
1705
 
                                % server_settings[u"servicename"]))
1706
 
    
1707
713
    # Parse config file with clients
1708
 
    client_defaults = { u"timeout": u"1h",
1709
 
                        u"interval": u"5m",
1710
 
                        u"checker": u"fping -q -- %%(host)s",
1711
 
                        u"host": u"",
1712
 
                        u"approved_delay": u"0s",
1713
 
                        u"approved_duration": u"1s",
 
714
    client_defaults = { "timeout": "1h",
 
715
                        "interval": "5m",
 
716
                        "checker": "fping -q -- %%(fqdn)s",
1714
717
                        }
1715
 
    client_config = configparser.SafeConfigParser(client_defaults)
1716
 
    client_config.read(os.path.join(server_settings[u"configdir"],
1717
 
                                    u"clients.conf"))
1718
 
    
1719
 
    global mandos_dbus_service
1720
 
    mandos_dbus_service = None
1721
 
    
1722
 
    tcp_server = MandosServer((server_settings[u"address"],
1723
 
                               server_settings[u"port"]),
1724
 
                              ClientHandler,
1725
 
                              interface=server_settings[u"interface"],
1726
 
                              use_ipv6=use_ipv6,
1727
 
                              gnutls_priority=
1728
 
                              server_settings[u"priority"],
1729
 
                              use_dbus=use_dbus)
1730
 
    pidfilename = u"/var/run/mandos.pid"
1731
 
    try:
1732
 
        pidfile = open(pidfilename, u"w")
1733
 
    except IOError:
1734
 
        logger.error(u"Could not open file %r", pidfilename)
1735
 
    
1736
 
    try:
1737
 
        uid = pwd.getpwnam(u"_mandos").pw_uid
1738
 
        gid = pwd.getpwnam(u"_mandos").pw_gid
1739
 
    except KeyError:
1740
 
        try:
1741
 
            uid = pwd.getpwnam(u"mandos").pw_uid
1742
 
            gid = pwd.getpwnam(u"mandos").pw_gid
1743
 
        except KeyError:
1744
 
            try:
1745
 
                uid = pwd.getpwnam(u"nobody").pw_uid
1746
 
                gid = pwd.getpwnam(u"nobody").pw_gid
1747
 
            except KeyError:
1748
 
                uid = 65534
1749
 
                gid = 65534
1750
 
    try:
1751
 
        os.setgid(gid)
1752
 
        os.setuid(uid)
1753
 
    except OSError, error:
1754
 
        if error[0] != errno.EPERM:
1755
 
            raise error
1756
 
    
1757
 
    # Enable all possible GnuTLS debugging
1758
 
    if debug:
1759
 
        # "Use a log level over 10 to enable all debugging options."
1760
 
        # - GnuTLS manual
1761
 
        gnutls.library.functions.gnutls_global_set_log_level(11)
1762
 
        
1763
 
        @gnutls.library.types.gnutls_log_func
1764
 
        def debug_gnutls(level, string):
1765
 
            logger.debug(u"GnuTLS: %s", string[:-1])
1766
 
        
1767
 
        (gnutls.library.functions
1768
 
         .gnutls_global_set_log_function(debug_gnutls))
 
718
    client_config = ConfigParser.SafeConfigParser(client_defaults)
 
719
    client_config.read(os.path.join(server_settings["configdir"],
 
720
                                    "clients.conf"))
 
721
    
 
722
    global service
 
723
    service = AvahiService(name = server_settings["servicename"],
 
724
                           type = "_mandos._tcp", );
 
725
    if server_settings["interface"]:
 
726
        service.interface = if_nametoindex(server_settings["interface"])
1769
727
    
1770
728
    global main_loop
 
729
    global bus
 
730
    global server
1771
731
    # From the Avahi example code
1772
732
    DBusGMainLoop(set_as_default=True )
1773
733
    main_loop = gobject.MainLoop()
1774
734
    bus = dbus.SystemBus()
 
735
    server = dbus.Interface(
 
736
            bus.get_object( avahi.DBUS_NAME, avahi.DBUS_PATH_SERVER ),
 
737
            avahi.DBUS_INTERFACE_SERVER )
1775
738
    # End of Avahi example code
1776
 
    if use_dbus:
1777
 
        try:
1778
 
            bus_name = dbus.service.BusName(u"se.bsnet.fukt.Mandos",
1779
 
                                            bus, do_not_queue=True)
1780
 
        except dbus.exceptions.NameExistsException, e:
1781
 
            logger.error(unicode(e) + u", disabling D-Bus")
1782
 
            use_dbus = False
1783
 
            server_settings[u"use_dbus"] = False
1784
 
            tcp_server.use_dbus = False
1785
 
    protocol = avahi.PROTO_INET6 if use_ipv6 else avahi.PROTO_INET
1786
 
    service = AvahiService(name = server_settings[u"servicename"],
1787
 
                           servicetype = u"_mandos._tcp",
1788
 
                           protocol = protocol, bus = bus)
1789
 
    if server_settings["interface"]:
1790
 
        service.interface = (if_nametoindex
1791
 
                             (str(server_settings[u"interface"])))
1792
 
 
1793
 
    global multiprocessing_manager
1794
 
    multiprocessing_manager = multiprocessing.Manager()
1795
 
    
1796
 
    client_class = Client
1797
 
    if use_dbus:
1798
 
        client_class = functools.partial(ClientDBus, bus = bus)
1799
 
    def client_config_items(config, section):
1800
 
        special_settings = {
1801
 
            "approved_by_default":
1802
 
                lambda: config.getboolean(section,
1803
 
                                          "approved_by_default"),
1804
 
            }
1805
 
        for name, value in config.items(section):
1806
 
            try:
1807
 
                yield (name, special_settings[name]())
1808
 
            except KeyError:
1809
 
                yield (name, value)
1810
 
    
1811
 
    tcp_server.clients.update(set(
1812
 
            client_class(name = section,
1813
 
                         config= dict(client_config_items(
1814
 
                        client_config, section)))
1815
 
            for section in client_config.sections()))
1816
 
    if not tcp_server.clients:
1817
 
        logger.warning(u"No clients defined")
 
739
    
 
740
    debug = server_settings["debug"]
1818
741
    
1819
742
    if debug:
1820
 
        # Redirect stdin so all checkers get /dev/null
1821
 
        null = os.open(os.path.devnull, os.O_NOCTTY | os.O_RDWR)
1822
 
        os.dup2(null, sys.stdin.fileno())
1823
 
        if null > 2:
1824
 
            os.close(null)
1825
 
    else:
1826
 
        # No console logging
1827
 
        logger.removeHandler(console)
1828
 
        # Close all input and output, do double fork, etc.
1829
 
        daemon()
1830
 
    
1831
 
    try:
1832
 
        with pidfile:
1833
 
            pid = os.getpid()
1834
 
            pidfile.write(str(pid) + "\n")
1835
 
        del pidfile
1836
 
    except IOError:
1837
 
        logger.error(u"Could not write to file %r with PID %d",
1838
 
                     pidfilename, pid)
1839
 
    except NameError:
1840
 
        # "pidfile" was never created
1841
 
        pass
1842
 
    del pidfilename
 
743
        console = logging.StreamHandler()
 
744
        # console.setLevel(logging.DEBUG)
 
745
        console.setFormatter(logging.Formatter\
 
746
                             ('%(levelname)s: %(message)s'))
 
747
        logger.addHandler(console)
 
748
        del console
 
749
    
 
750
    clients = Set()
 
751
    def remove_from_clients(client):
 
752
        clients.remove(client)
 
753
        if not clients:
 
754
            logger.debug(u"No clients left, exiting")
 
755
            sys.exit()
 
756
    
 
757
    clients.update(Set(Client(name=section,
 
758
                              stop_hook = remove_from_clients,
 
759
                              **(dict(client_config\
 
760
                                      .items(section))))
 
761
                       for section in client_config.sections()))
 
762
    
 
763
    if not debug:
 
764
        daemon(False, False)
 
765
    
 
766
    def cleanup():
 
767
        "Cleanup function; run on exit"
 
768
        global group
 
769
        # From the Avahi example code
 
770
        if not group is None:
 
771
            group.Free()
 
772
            group = None
 
773
        # End of Avahi example code
 
774
        
 
775
        while clients:
 
776
            client = clients.pop()
 
777
            client.stop_hook = None
 
778
            client.stop()
 
779
    
 
780
    atexit.register(cleanup)
1843
781
    
1844
782
    if not debug:
1845
783
        signal.signal(signal.SIGINT, signal.SIG_IGN)
1846
784
    signal.signal(signal.SIGHUP, lambda signum, frame: sys.exit())
1847
785
    signal.signal(signal.SIGTERM, lambda signum, frame: sys.exit())
1848
786
    
1849
 
    if use_dbus:
1850
 
        class MandosDBusService(dbus.service.Object):
1851
 
            """A D-Bus proxy object"""
1852
 
            def __init__(self):
1853
 
                dbus.service.Object.__init__(self, bus, u"/")
1854
 
            _interface = u"se.bsnet.fukt.Mandos"
1855
 
            
1856
 
            @dbus.service.signal(_interface, signature=u"o")
1857
 
            def ClientAdded(self, objpath):
1858
 
                "D-Bus signal"
1859
 
                pass
1860
 
            
1861
 
            @dbus.service.signal(_interface, signature=u"ss")
1862
 
            def ClientNotFound(self, fingerprint, address):
1863
 
                "D-Bus signal"
1864
 
                pass
1865
 
            
1866
 
            @dbus.service.signal(_interface, signature=u"os")
1867
 
            def ClientRemoved(self, objpath, name):
1868
 
                "D-Bus signal"
1869
 
                pass
1870
 
            
1871
 
            @dbus.service.method(_interface, out_signature=u"ao")
1872
 
            def GetAllClients(self):
1873
 
                "D-Bus method"
1874
 
                return dbus.Array(c.dbus_object_path
1875
 
                                  for c in tcp_server.clients)
1876
 
            
1877
 
            @dbus.service.method(_interface,
1878
 
                                 out_signature=u"a{oa{sv}}")
1879
 
            def GetAllClientsWithProperties(self):
1880
 
                "D-Bus method"
1881
 
                return dbus.Dictionary(
1882
 
                    ((c.dbus_object_path, c.GetAll(u""))
1883
 
                     for c in tcp_server.clients),
1884
 
                    signature=u"oa{sv}")
1885
 
            
1886
 
            @dbus.service.method(_interface, in_signature=u"o")
1887
 
            def RemoveClient(self, object_path):
1888
 
                "D-Bus method"
1889
 
                for c in tcp_server.clients:
1890
 
                    if c.dbus_object_path == object_path:
1891
 
                        tcp_server.clients.remove(c)
1892
 
                        c.remove_from_connection()
1893
 
                        # Don't signal anything except ClientRemoved
1894
 
                        c.disable(quiet=True)
1895
 
                        # Emit D-Bus signal
1896
 
                        self.ClientRemoved(object_path, c.name)
1897
 
                        return
1898
 
                raise KeyError(object_path)
1899
 
            
1900
 
            del _interface
1901
 
        
1902
 
        mandos_dbus_service = MandosDBusService()
1903
 
    
1904
 
    def cleanup():
1905
 
        "Cleanup function; run on exit"
1906
 
        service.cleanup()
1907
 
        
1908
 
        while tcp_server.clients:
1909
 
            client = tcp_server.clients.pop()
1910
 
            if use_dbus:
1911
 
                client.remove_from_connection()
1912
 
            client.disable_hook = None
1913
 
            # Don't signal anything except ClientRemoved
1914
 
            client.disable(quiet=True)
1915
 
            if use_dbus:
1916
 
                # Emit D-Bus signal
1917
 
                mandos_dbus_service.ClientRemoved(client.dbus_object_path,
1918
 
                                                  client.name)
1919
 
    
1920
 
    atexit.register(cleanup)
1921
 
    
1922
 
    for client in tcp_server.clients:
1923
 
        if use_dbus:
1924
 
            # Emit D-Bus signal
1925
 
            mandos_dbus_service.ClientAdded(client.dbus_object_path)
1926
 
        client.enable()
1927
 
    
1928
 
    tcp_server.enable()
1929
 
    tcp_server.server_activate()
1930
 
    
 
787
    for client in clients:
 
788
        client.start()
 
789
    
 
790
    tcp_server = IPv6_TCPServer((server_settings["address"],
 
791
                                 server_settings["port"]),
 
792
                                tcp_handler,
 
793
                                settings=server_settings,
 
794
                                clients=clients)
1931
795
    # Find out what port we got
1932
796
    service.port = tcp_server.socket.getsockname()[1]
1933
 
    if use_ipv6:
1934
 
        logger.info(u"Now listening on address %r, port %d,"
1935
 
                    " flowinfo %d, scope_id %d"
1936
 
                    % tcp_server.socket.getsockname())
1937
 
    else:                       # IPv4
1938
 
        logger.info(u"Now listening on address %r, port %d"
1939
 
                    % tcp_server.socket.getsockname())
 
797
    logger.debug(u"Now listening on address %r, port %d, flowinfo %d,"
 
798
                 u" scope_id %d" % tcp_server.socket.getsockname())
1940
799
    
1941
800
    #service.interface = tcp_server.socket.getsockname()[3]
1942
801
    
1943
802
    try:
1944
803
        # From the Avahi example code
 
804
        server.connect_to_signal("StateChanged", server_state_changed)
1945
805
        try:
1946
 
            service.activate()
 
806
            server_state_changed(server.GetState())
1947
807
        except dbus.exceptions.DBusException, error:
1948
808
            logger.critical(u"DBusException: %s", error)
1949
 
            cleanup()
1950
809
            sys.exit(1)
1951
810
        # End of Avahi example code
1952
811
        
1953
812
        gobject.io_add_watch(tcp_server.fileno(), gobject.IO_IN,
1954
813
                             lambda *args, **kwargs:
1955
 
                             (tcp_server.handle_request
1956
 
                              (*args[2:], **kwargs) or True))
 
814
                             tcp_server.handle_request\
 
815
                             (*args[2:], **kwargs) or True)
1957
816
        
1958
 
        logger.debug(u"Starting main loop")
 
817
        logger.debug("Starting main loop")
 
818
        main_loop_started = True
1959
819
        main_loop.run()
1960
820
    except AvahiError, error:
1961
 
        logger.critical(u"AvahiError: %s", error)
1962
 
        cleanup()
 
821
        logger.critical(u"AvahiError: %s" + unicode(error))
1963
822
        sys.exit(1)
1964
823
    except KeyboardInterrupt:
1965
824
        if debug:
1966
 
            print >> sys.stderr
1967
 
        logger.debug(u"Server received KeyboardInterrupt")
1968
 
    logger.debug(u"Server exiting")
1969
 
    # Must run before the D-Bus bus name gets deregistered
1970
 
    cleanup()
 
825
            print
1971
826
 
1972
827
if __name__ == '__main__':
1973
828
    main()