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# This program is partly derived from an example program for an Avahi
7
7
# service publisher, downloaded from
8
8
# <http://avahi.org/wiki/PythonPublishExample>.  This includes the
9
 
# methods "add", "remove", "server_state_changed",
10
 
# "entry_group_state_changed", "cleanup", and "activate" in the
11
 
# "AvahiService" class, and some lines in "main".
 
9
# methods "add" and "remove" in the "AvahiService" class, the
 
10
# "server_state_changed" and "entry_group_state_changed" functions,
 
11
# and some lines in "main".
12
12
13
13
# Everything else is
14
 
# Copyright © 2008-2011 Teddy Hogeborn
15
 
# Copyright © 2008-2011 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, absolute_import, print_function,
35
 
                        unicode_literals)
 
32
from __future__ import division
36
33
 
37
 
import SocketServer as socketserver
 
34
import SocketServer
38
35
import socket
39
 
import argparse
 
36
import select
 
37
from optparse import OptionParser
40
38
import datetime
41
39
import errno
42
40
import gnutls.crypto
45
43
import gnutls.library.functions
46
44
import gnutls.library.constants
47
45
import gnutls.library.types
48
 
import ConfigParser as configparser
 
46
import ConfigParser
49
47
import sys
50
48
import re
51
49
import os
52
50
import signal
 
51
from sets import Set
53
52
import subprocess
54
53
import atexit
55
54
import stat
56
55
import logging
57
56
import logging.handlers
58
 
import pwd
59
 
import contextlib
60
 
import struct
61
 
import fcntl
62
 
import functools
63
 
import cPickle as pickle
64
 
import multiprocessing
65
57
 
66
58
import dbus
67
 
import dbus.service
68
59
import gobject
69
60
import avahi
70
61
from dbus.mainloop.glib import DBusGMainLoop
71
62
import ctypes
72
 
import ctypes.util
73
 
import xml.dom.minidom
74
 
import inspect
75
 
 
76
 
try:
77
 
    SO_BINDTODEVICE = socket.SO_BINDTODEVICE
78
 
except AttributeError:
79
 
    try:
80
 
        from IN import SO_BINDTODEVICE
81
 
    except ImportError:
82
 
        SO_BINDTODEVICE = None
83
 
 
84
 
 
85
 
version = "1.3.0"
86
 
 
87
 
#logger = logging.getLogger('mandos')
 
63
 
 
64
version = "1.0"
 
65
 
88
66
logger = logging.Logger('mandos')
89
 
syslogger = (logging.handlers.SysLogHandler
90
 
             (facility = logging.handlers.SysLogHandler.LOG_DAEMON,
91
 
              address = str("/dev/log")))
92
 
syslogger.setFormatter(logging.Formatter
93
 
                       ('Mandos [%(process)d]: %(levelname)s:'
94
 
                        ' %(message)s'))
 
67
syslogger = logging.handlers.SysLogHandler\
 
68
            (facility = logging.handlers.SysLogHandler.LOG_DAEMON,
 
69
             address = "/dev/log")
 
70
syslogger.setFormatter(logging.Formatter\
 
71
                        ('Mandos: %(levelname)s: %(message)s'))
95
72
logger.addHandler(syslogger)
96
73
 
97
74
console = logging.StreamHandler()
98
 
console.setFormatter(logging.Formatter('%(name)s [%(process)d]:'
99
 
                                       ' %(levelname)s:'
 
75
console.setFormatter(logging.Formatter('%(name)s: %(levelname)s:'
100
76
                                       ' %(message)s'))
101
77
logger.addHandler(console)
102
78
 
103
79
class AvahiError(Exception):
104
 
    def __init__(self, value, *args, **kwargs):
 
80
    def __init__(self, value):
105
81
        self.value = value
106
 
        super(AvahiError, self).__init__(value, *args, **kwargs)
107
 
    def __unicode__(self):
108
 
        return unicode(repr(self.value))
 
82
    def __str__(self):
 
83
        return repr(self.value)
109
84
 
110
85
class AvahiServiceError(AvahiError):
111
86
    pass
116
91
 
117
92
class AvahiService(object):
118
93
    """An Avahi (Zeroconf) service.
119
 
    
120
94
    Attributes:
121
95
    interface: integer; avahi.IF_UNSPEC or an interface index.
122
96
               Used to optionally bind to the specified interface.
130
104
    max_renames: integer; maximum number of renames
131
105
    rename_count: integer; counter so we only rename after collisions
132
106
                  a sensible number of times
133
 
    group: D-Bus Entry Group
134
 
    server: D-Bus Server
135
 
    bus: dbus.SystemBus()
136
107
    """
137
108
    def __init__(self, interface = avahi.IF_UNSPEC, name = None,
138
 
                 servicetype = None, port = None, TXT = None,
139
 
                 domain = "", host = "", max_renames = 32768,
140
 
                 protocol = avahi.PROTO_UNSPEC, bus = None):
 
109
                 type = None, port = None, TXT = None, domain = "",
 
110
                 host = "", max_renames = 32768):
141
111
        self.interface = interface
142
112
        self.name = name
143
 
        self.type = servicetype
 
113
        self.type = type
144
114
        self.port = port
145
 
        self.TXT = TXT if TXT is not None else []
 
115
        if TXT is None:
 
116
            self.TXT = []
 
117
        else:
 
118
            self.TXT = TXT
146
119
        self.domain = domain
147
120
        self.host = host
148
121
        self.rename_count = 0
149
122
        self.max_renames = max_renames
150
 
        self.protocol = protocol
151
 
        self.group = None       # our entry group
152
 
        self.server = None
153
 
        self.bus = bus
154
123
    def rename(self):
155
124
        """Derived from the Avahi example code"""
156
125
        if self.rename_count >= self.max_renames:
157
 
            logger.critical("No suitable Zeroconf service name found"
158
 
                            " after %i retries, exiting.",
159
 
                            self.rename_count)
 
126
            logger.critical(u"No suitable service name found after %i"
 
127
                            u" retries, exiting.", rename_count)
160
128
            raise AvahiServiceError("Too many renames")
161
 
        self.name = unicode(self.server.GetAlternativeServiceName(self.name))
162
 
        logger.info("Changing Zeroconf service name to %r ...",
163
 
                    self.name)
164
 
        syslogger.setFormatter(logging.Formatter
165
 
                               ('Mandos (%s) [%%(process)d]:'
166
 
                                ' %%(levelname)s: %%(message)s'
167
 
                                % self.name))
 
129
        self.name = server.GetAlternativeServiceName(self.name)
 
130
        logger.info(u"Changing name to %r ...", str(self.name))
 
131
        syslogger.setFormatter(logging.Formatter\
 
132
                               ('Mandos (%s): %%(levelname)s:'
 
133
                               ' %%(message)s' % self.name))
168
134
        self.remove()
169
 
        try:
170
 
            self.add()
171
 
        except dbus.exceptions.DBusException, error:
172
 
            logger.critical("DBusException: %s", error)
173
 
            self.cleanup()
174
 
            os._exit(1)
 
135
        self.add()
175
136
        self.rename_count += 1
176
137
    def remove(self):
177
138
        """Derived from the Avahi example code"""
178
 
        if self.group is not None:
179
 
            self.group.Reset()
 
139
        if group is not None:
 
140
            group.Reset()
180
141
    def add(self):
181
142
        """Derived from the Avahi example code"""
182
 
        if self.group is None:
183
 
            self.group = dbus.Interface(
184
 
                self.bus.get_object(avahi.DBUS_NAME,
185
 
                                    self.server.EntryGroupNew()),
186
 
                avahi.DBUS_INTERFACE_ENTRY_GROUP)
187
 
            self.group.connect_to_signal('StateChanged',
188
 
                                         self
189
 
                                         .entry_group_state_changed)
190
 
        logger.debug("Adding Zeroconf service '%s' of type '%s' ...",
191
 
                     self.name, self.type)
192
 
        self.group.AddService(
193
 
            self.interface,
194
 
            self.protocol,
195
 
            dbus.UInt32(0),     # flags
196
 
            self.name, self.type,
197
 
            self.domain, self.host,
198
 
            dbus.UInt16(self.port),
199
 
            avahi.string_array_to_txt_array(self.TXT))
200
 
        self.group.Commit()
201
 
    def entry_group_state_changed(self, state, error):
202
 
        """Derived from the Avahi example code"""
203
 
        logger.debug("Avahi entry group state change: %i", state)
204
 
        
205
 
        if state == avahi.ENTRY_GROUP_ESTABLISHED:
206
 
            logger.debug("Zeroconf service established.")
207
 
        elif state == avahi.ENTRY_GROUP_COLLISION:
208
 
            logger.info("Zeroconf service name collision.")
209
 
            self.rename()
210
 
        elif state == avahi.ENTRY_GROUP_FAILURE:
211
 
            logger.critical("Avahi: Error in group state changed %s",
212
 
                            unicode(error))
213
 
            raise AvahiGroupError("State changed: %s"
214
 
                                  % unicode(error))
215
 
    def cleanup(self):
216
 
        """Derived from the Avahi example code"""
217
 
        if self.group is not None:
218
 
            self.group.Free()
219
 
            self.group = None
220
 
    def server_state_changed(self, state):
221
 
        """Derived from the Avahi example code"""
222
 
        logger.debug("Avahi server state change: %i", state)
223
 
        if state == avahi.SERVER_COLLISION:
224
 
            logger.error("Zeroconf server name collision")
225
 
            self.remove()
226
 
        elif state == avahi.SERVER_RUNNING:
227
 
            self.add()
228
 
    def activate(self):
229
 
        """Derived from the Avahi example code"""
230
 
        if self.server is None:
231
 
            self.server = dbus.Interface(
232
 
                self.bus.get_object(avahi.DBUS_NAME,
233
 
                                    avahi.DBUS_PATH_SERVER),
234
 
                avahi.DBUS_INTERFACE_SERVER)
235
 
        self.server.connect_to_signal("StateChanged",
236
 
                                 self.server_state_changed)
237
 
        self.server_state_changed(self.server.GetState())
 
143
        global group
 
144
        if group is None:
 
145
            group = dbus.Interface\
 
146
                    (bus.get_object(avahi.DBUS_NAME,
 
147
                                    server.EntryGroupNew()),
 
148
                     avahi.DBUS_INTERFACE_ENTRY_GROUP)
 
149
            group.connect_to_signal('StateChanged',
 
150
                                    entry_group_state_changed)
 
151
        logger.debug(u"Adding service '%s' of type '%s' ...",
 
152
                     service.name, service.type)
 
153
        group.AddService(
 
154
                self.interface,         # interface
 
155
                avahi.PROTO_INET6,      # protocol
 
156
                dbus.UInt32(0),         # flags
 
157
                self.name, self.type,
 
158
                self.domain, self.host,
 
159
                dbus.UInt16(self.port),
 
160
                avahi.string_array_to_txt_array(self.TXT))
 
161
        group.Commit()
 
162
 
 
163
# From the Avahi example code:
 
164
group = None                            # our entry group
 
165
# End of Avahi example code
238
166
 
239
167
 
240
168
class Client(object):
241
169
    """A representation of a client host served by this server.
242
 
    
243
170
    Attributes:
244
 
    _approved:   bool(); 'None' if not yet approved/disapproved
245
 
    approval_delay: datetime.timedelta(); Time to wait for approval
246
 
    approval_duration: datetime.timedelta(); Duration of one approval
247
 
    checker:    subprocess.Popen(); a running checker process used
248
 
                                    to see if the client lives.
249
 
                                    'None' if no process is running.
250
 
    checker_callback_tag: a gobject event source tag, or None
251
 
    checker_command: string; External command which is run to check
252
 
                     if client lives.  %() expansions are done at
 
171
    name:      string; from the config file, used in log messages
 
172
    fingerprint: string (40 or 32 hexadecimal digits); used to
 
173
                 uniquely identify the client
 
174
    secret:    bytestring; sent verbatim (over TLS) to client
 
175
    host:      string; available for use by the checker command
 
176
    created:   datetime.datetime(); object creation, not client host
 
177
    last_checked_ok: datetime.datetime() or None if not yet checked OK
 
178
    timeout:   datetime.timedelta(); How long from last_checked_ok
 
179
                                     until this client is invalid
 
180
    interval:  datetime.timedelta(); How often to start a new checker
 
181
    stop_hook: If set, called by stop() as stop_hook(self)
 
182
    checker:   subprocess.Popen(); a running checker process used
 
183
                                   to see if the client lives.
 
184
                                   'None' if no process is running.
 
185
    checker_initiator_tag: a gobject event source tag, or None
 
186
    stop_initiator_tag:    - '' -
 
187
    checker_callback_tag:  - '' -
 
188
    checker_command: string; External command which is run to check if
 
189
                     client lives.  %() expansions are done at
253
190
                     runtime with vars(self) as dict, so that for
254
191
                     instance %(name)s can be used in the command.
255
 
    checker_initiator_tag: a gobject event source tag, or None
256
 
    created:    datetime.datetime(); (UTC) object creation
257
 
    current_checker_command: string; current running checker_command
258
 
    disable_hook:  If set, called by disable() as disable_hook(self)
259
 
    disable_initiator_tag: a gobject event source tag, or None
260
 
    enabled:    bool()
261
 
    fingerprint: string (40 or 32 hexadecimal digits); used to
262
 
                 uniquely identify the client
263
 
    host:       string; available for use by the checker command
264
 
    interval:   datetime.timedelta(); How often to start a new checker
265
 
    last_approval_request: datetime.datetime(); (UTC) or None
266
 
    last_checked_ok: datetime.datetime(); (UTC) or None
267
 
    last_enabled: datetime.datetime(); (UTC)
268
 
    name:       string; from the config file, used in log messages and
269
 
                        D-Bus identifiers
270
 
    secret:     bytestring; sent verbatim (over TLS) to client
271
 
    timeout:    datetime.timedelta(); How long from last_checked_ok
272
 
                                      until this client is disabled
273
 
    runtime_expansions: Allowed attributes for runtime expansion.
 
192
    Private attibutes:
 
193
    _timeout: Real variable for 'timeout'
 
194
    _interval: Real variable for 'interval'
 
195
    _timeout_milliseconds: Used when calling gobject.timeout_add()
 
196
    _interval_milliseconds: - '' -
274
197
    """
275
 
    
276
 
    runtime_expansions = ("approval_delay", "approval_duration",
277
 
                          "created", "enabled", "fingerprint",
278
 
                          "host", "interval", "last_checked_ok",
279
 
                          "last_enabled", "name", "timeout")
280
 
    
281
 
    @staticmethod
282
 
    def _timedelta_to_milliseconds(td):
283
 
        "Convert a datetime.timedelta() to milliseconds"
284
 
        return ((td.days * 24 * 60 * 60 * 1000)
285
 
                + (td.seconds * 1000)
286
 
                + (td.microseconds // 1000))
287
 
    
288
 
    def timeout_milliseconds(self):
289
 
        "Return the 'timeout' attribute in milliseconds"
290
 
        return self._timedelta_to_milliseconds(self.timeout)
291
 
    
292
 
    def interval_milliseconds(self):
293
 
        "Return the 'interval' attribute in milliseconds"
294
 
        return self._timedelta_to_milliseconds(self.interval)
295
 
 
296
 
    def approval_delay_milliseconds(self):
297
 
        return self._timedelta_to_milliseconds(self.approval_delay)
298
 
    
299
 
    def __init__(self, name = None, disable_hook=None, config=None):
 
198
    def _set_timeout(self, timeout):
 
199
        "Setter function for 'timeout' attribute"
 
200
        self._timeout = timeout
 
201
        self._timeout_milliseconds = ((self.timeout.days
 
202
                                       * 24 * 60 * 60 * 1000)
 
203
                                      + (self.timeout.seconds * 1000)
 
204
                                      + (self.timeout.microseconds
 
205
                                         // 1000))
 
206
    timeout = property(lambda self: self._timeout,
 
207
                       _set_timeout)
 
208
    del _set_timeout
 
209
    def _set_interval(self, interval):
 
210
        "Setter function for 'interval' attribute"
 
211
        self._interval = interval
 
212
        self._interval_milliseconds = ((self.interval.days
 
213
                                        * 24 * 60 * 60 * 1000)
 
214
                                       + (self.interval.seconds
 
215
                                          * 1000)
 
216
                                       + (self.interval.microseconds
 
217
                                          // 1000))
 
218
    interval = property(lambda self: self._interval,
 
219
                        _set_interval)
 
220
    del _set_interval
 
221
    def __init__(self, name = None, stop_hook=None, config={}):
300
222
        """Note: the 'checker' key in 'config' sets the
301
223
        'checker_command' attribute and *not* the 'checker'
302
224
        attribute."""
303
225
        self.name = name
304
 
        if config is None:
305
 
            config = {}
306
 
        logger.debug("Creating client %r", self.name)
 
226
        logger.debug(u"Creating client %r", self.name)
307
227
        # Uppercase and remove spaces from fingerprint for later
308
228
        # comparison purposes with return value from the fingerprint()
309
229
        # function
310
 
        self.fingerprint = (config["fingerprint"].upper()
311
 
                            .replace(" ", ""))
312
 
        logger.debug("  Fingerprint: %s", self.fingerprint)
 
230
        self.fingerprint = config["fingerprint"].upper()\
 
231
                           .replace(u" ", u"")
 
232
        logger.debug(u"  Fingerprint: %s", self.fingerprint)
313
233
        if "secret" in config:
314
 
            self.secret = config["secret"].decode("base64")
 
234
            self.secret = config["secret"].decode(u"base64")
315
235
        elif "secfile" in config:
316
 
            with open(os.path.expanduser(os.path.expandvars
317
 
                                         (config["secfile"])),
318
 
                      "rb") as secfile:
319
 
                self.secret = secfile.read()
 
236
            sf = open(config["secfile"])
 
237
            self.secret = sf.read()
 
238
            sf.close()
320
239
        else:
321
 
            raise TypeError("No secret or secfile for client %s"
 
240
            raise TypeError(u"No secret or secfile for client %s"
322
241
                            % self.name)
323
242
        self.host = config.get("host", "")
324
 
        self.created = datetime.datetime.utcnow()
325
 
        self.enabled = False
326
 
        self.last_approval_request = None
327
 
        self.last_enabled = None
 
243
        self.created = datetime.datetime.now()
328
244
        self.last_checked_ok = None
329
245
        self.timeout = string_to_delta(config["timeout"])
330
246
        self.interval = string_to_delta(config["interval"])
331
 
        self.disable_hook = disable_hook
 
247
        self.stop_hook = stop_hook
332
248
        self.checker = None
333
249
        self.checker_initiator_tag = None
334
 
        self.disable_initiator_tag = None
 
250
        self.stop_initiator_tag = None
335
251
        self.checker_callback_tag = None
336
 
        self.checker_command = config["checker"]
337
 
        self.current_checker_command = None
338
 
        self.last_connect = None
339
 
        self._approved = None
340
 
        self.approved_by_default = config.get("approved_by_default",
341
 
                                              True)
342
 
        self.approvals_pending = 0
343
 
        self.approval_delay = string_to_delta(
344
 
            config["approval_delay"])
345
 
        self.approval_duration = string_to_delta(
346
 
            config["approval_duration"])
347
 
        self.changedstate = multiprocessing_manager.Condition(multiprocessing_manager.Lock())
348
 
    
349
 
    def send_changedstate(self):
350
 
        self.changedstate.acquire()
351
 
        self.changedstate.notify_all()
352
 
        self.changedstate.release()
353
 
        
354
 
    def enable(self):
 
252
        self.check_command = config["checker"]
 
253
    def start(self):
355
254
        """Start this client's checker and timeout hooks"""
356
 
        if getattr(self, "enabled", False):
357
 
            # Already enabled
358
 
            return
359
 
        self.send_changedstate()
360
 
        self.last_enabled = datetime.datetime.utcnow()
361
255
        # Schedule a new checker to be started an 'interval' from now,
362
256
        # and every interval from then on.
363
 
        self.checker_initiator_tag = (gobject.timeout_add
364
 
                                      (self.interval_milliseconds(),
365
 
                                       self.start_checker))
366
 
        # Schedule a disable() when 'timeout' has passed
367
 
        self.disable_initiator_tag = (gobject.timeout_add
368
 
                                   (self.timeout_milliseconds(),
369
 
                                    self.disable))
370
 
        self.enabled = True
 
257
        self.checker_initiator_tag = gobject.timeout_add\
 
258
                                     (self._interval_milliseconds,
 
259
                                      self.start_checker)
371
260
        # Also start a new checker *right now*.
372
261
        self.start_checker()
373
 
    
374
 
    def disable(self, quiet=True):
375
 
        """Disable this client."""
376
 
        if not getattr(self, "enabled", False):
 
262
        # Schedule a stop() when 'timeout' has passed
 
263
        self.stop_initiator_tag = gobject.timeout_add\
 
264
                                  (self._timeout_milliseconds,
 
265
                                   self.stop)
 
266
    def stop(self):
 
267
        """Stop this client.
 
268
        The possibility that a client might be restarted is left open,
 
269
        but not currently used."""
 
270
        # If this client doesn't have a secret, it is already stopped.
 
271
        if hasattr(self, "secret") and self.secret:
 
272
            logger.info(u"Stopping client %s", self.name)
 
273
            self.secret = None
 
274
        else:
377
275
            return False
378
 
        if not quiet:
379
 
            self.send_changedstate()
380
 
        if not quiet:
381
 
            logger.info("Disabling client %s", self.name)
382
 
        if getattr(self, "disable_initiator_tag", False):
383
 
            gobject.source_remove(self.disable_initiator_tag)
384
 
            self.disable_initiator_tag = None
 
276
        if getattr(self, "stop_initiator_tag", False):
 
277
            gobject.source_remove(self.stop_initiator_tag)
 
278
            self.stop_initiator_tag = None
385
279
        if getattr(self, "checker_initiator_tag", False):
386
280
            gobject.source_remove(self.checker_initiator_tag)
387
281
            self.checker_initiator_tag = None
388
282
        self.stop_checker()
389
 
        if self.disable_hook:
390
 
            self.disable_hook(self)
391
 
        self.enabled = False
 
283
        if self.stop_hook:
 
284
            self.stop_hook(self)
392
285
        # Do not run this again if called by a gobject.timeout_add
393
286
        return False
394
 
    
395
287
    def __del__(self):
396
 
        self.disable_hook = None
397
 
        self.disable()
398
 
    
399
 
    def checker_callback(self, pid, condition, command):
 
288
        self.stop_hook = None
 
289
        self.stop()
 
290
    def checker_callback(self, pid, condition):
400
291
        """The checker has completed, so take appropriate actions."""
 
292
        now = datetime.datetime.now()
401
293
        self.checker_callback_tag = None
402
294
        self.checker = None
403
 
        if os.WIFEXITED(condition):
404
 
            exitstatus = os.WEXITSTATUS(condition)
405
 
            if exitstatus == 0:
406
 
                logger.info("Checker for %(name)s succeeded",
407
 
                            vars(self))
408
 
                self.checked_ok()
409
 
            else:
410
 
                logger.info("Checker for %(name)s failed",
411
 
                            vars(self))
412
 
        else:
413
 
            logger.warning("Checker for %(name)s crashed?",
 
295
        if os.WIFEXITED(condition) \
 
296
               and (os.WEXITSTATUS(condition) == 0):
 
297
            logger.info(u"Checker for %(name)s succeeded",
 
298
                        vars(self))
 
299
            self.last_checked_ok = now
 
300
            gobject.source_remove(self.stop_initiator_tag)
 
301
            self.stop_initiator_tag = gobject.timeout_add\
 
302
                                      (self._timeout_milliseconds,
 
303
                                       self.stop)
 
304
        elif not os.WIFEXITED(condition):
 
305
            logger.warning(u"Checker for %(name)s crashed?",
414
306
                           vars(self))
415
 
    
416
 
    def checked_ok(self):
417
 
        """Bump up the timeout for this client.
418
 
        
419
 
        This should only be called when the client has been seen,
420
 
        alive and well.
421
 
        """
422
 
        self.last_checked_ok = datetime.datetime.utcnow()
423
 
        gobject.source_remove(self.disable_initiator_tag)
424
 
        self.disable_initiator_tag = (gobject.timeout_add
425
 
                                      (self.timeout_milliseconds(),
426
 
                                       self.disable))
427
 
    
428
 
    def need_approval(self):
429
 
        self.last_approval_request = datetime.datetime.utcnow()
430
 
    
 
307
        else:
 
308
            logger.info(u"Checker for %(name)s failed",
 
309
                        vars(self))
431
310
    def start_checker(self):
432
311
        """Start a new checker subprocess if one is not running.
433
 
        
434
312
        If a checker already exists, leave it running and do
435
313
        nothing."""
436
314
        # The reason for not killing a running checker is that if we
439
317
        # client would inevitably timeout, since no checker would get
440
318
        # a chance to run to completion.  If we instead leave running
441
319
        # checkers alone, the checker would have to take more time
442
 
        # than 'timeout' for the client to be disabled, which is as it
443
 
        # should be.
444
 
        
445
 
        # If a checker exists, make sure it is not a zombie
446
 
        try:
447
 
            pid, status = os.waitpid(self.checker.pid, os.WNOHANG)
448
 
        except (AttributeError, OSError), error:
449
 
            if (isinstance(error, OSError)
450
 
                and error.errno != errno.ECHILD):
451
 
                raise error
452
 
        else:
453
 
            if pid:
454
 
                logger.warning("Checker was a zombie")
455
 
                gobject.source_remove(self.checker_callback_tag)
456
 
                self.checker_callback(pid, status,
457
 
                                      self.current_checker_command)
458
 
        # Start a new checker if needed
 
320
        # than 'timeout' for the client to be declared invalid, which
 
321
        # is as it should be.
459
322
        if self.checker is None:
460
323
            try:
461
 
                # In case checker_command has exactly one % operator
462
 
                command = self.checker_command % self.host
 
324
                # In case check_command has exactly one % operator
 
325
                command = self.check_command % self.host
463
326
            except TypeError:
464
327
                # Escape attributes for the shell
465
 
                escaped_attrs = dict(
466
 
                    (attr,
467
 
                     re.escape(unicode(str(getattr(self, attr, "")),
468
 
                                       errors=
469
 
                                       'replace')))
470
 
                    for attr in
471
 
                    self.runtime_expansions)
472
 
 
 
328
                escaped_attrs = dict((key, re.escape(str(val)))
 
329
                                     for key, val in
 
330
                                     vars(self).iteritems())
473
331
                try:
474
 
                    command = self.checker_command % escaped_attrs
 
332
                    command = self.check_command % escaped_attrs
475
333
                except TypeError, error:
476
 
                    logger.error('Could not format string "%s":'
477
 
                                 ' %s', self.checker_command, error)
 
334
                    logger.error(u'Could not format string "%s":'
 
335
                                 u' %s', self.check_command, error)
478
336
                    return True # Try again later
479
 
            self.current_checker_command = command
480
337
            try:
481
 
                logger.info("Starting checker %r for %s",
 
338
                logger.info(u"Starting checker %r for %s",
482
339
                            command, self.name)
483
340
                # We don't need to redirect stdout and stderr, since
484
341
                # in normal mode, that is already done by daemon(),
487
344
                self.checker = subprocess.Popen(command,
488
345
                                                close_fds=True,
489
346
                                                shell=True, cwd="/")
490
 
                self.checker_callback_tag = (gobject.child_watch_add
491
 
                                             (self.checker.pid,
492
 
                                              self.checker_callback,
493
 
                                              data=command))
494
 
                # The checker may have completed before the gobject
495
 
                # watch was added.  Check for this.
496
 
                pid, status = os.waitpid(self.checker.pid, os.WNOHANG)
497
 
                if pid:
498
 
                    gobject.source_remove(self.checker_callback_tag)
499
 
                    self.checker_callback(pid, status, command)
 
347
                self.checker_callback_tag = gobject.child_watch_add\
 
348
                                            (self.checker.pid,
 
349
                                             self.checker_callback)
500
350
            except OSError, error:
501
 
                logger.error("Failed to start subprocess: %s",
 
351
                logger.error(u"Failed to start subprocess: %s",
502
352
                             error)
503
353
        # Re-run this periodically if run by gobject.timeout_add
504
354
        return True
505
 
    
506
355
    def stop_checker(self):
507
356
        """Force the checker process, if any, to stop."""
508
357
        if self.checker_callback_tag:
510
359
            self.checker_callback_tag = None
511
360
        if getattr(self, "checker", None) is None:
512
361
            return
513
 
        logger.debug("Stopping checker for %(name)s", vars(self))
 
362
        logger.debug(u"Stopping checker for %(name)s", vars(self))
514
363
        try:
515
364
            os.kill(self.checker.pid, signal.SIGTERM)
516
 
            #time.sleep(0.5)
 
365
            #os.sleep(0.5)
517
366
            #if self.checker.poll() is None:
518
367
            #    os.kill(self.checker.pid, signal.SIGKILL)
519
368
        except OSError, error:
520
369
            if error.errno != errno.ESRCH: # No such process
521
370
                raise
522
371
        self.checker = None
523
 
 
524
 
def dbus_service_property(dbus_interface, signature="v",
525
 
                          access="readwrite", byte_arrays=False):
526
 
    """Decorators for marking methods of a DBusObjectWithProperties to
527
 
    become properties on the D-Bus.
528
 
    
529
 
    The decorated method will be called with no arguments by "Get"
530
 
    and with one argument by "Set".
531
 
    
532
 
    The parameters, where they are supported, are the same as
533
 
    dbus.service.method, except there is only "signature", since the
534
 
    type from Get() and the type sent to Set() is the same.
535
 
    """
536
 
    # Encoding deeply encoded byte arrays is not supported yet by the
537
 
    # "Set" method, so we fail early here:
538
 
    if byte_arrays and signature != "ay":
539
 
        raise ValueError("Byte arrays not supported for non-'ay'"
540
 
                         " signature %r" % signature)
541
 
    def decorator(func):
542
 
        func._dbus_is_property = True
543
 
        func._dbus_interface = dbus_interface
544
 
        func._dbus_signature = signature
545
 
        func._dbus_access = access
546
 
        func._dbus_name = func.__name__
547
 
        if func._dbus_name.endswith("_dbus_property"):
548
 
            func._dbus_name = func._dbus_name[:-14]
549
 
        func._dbus_get_args_options = {'byte_arrays': byte_arrays }
550
 
        return func
551
 
    return decorator
552
 
 
553
 
 
554
 
class DBusPropertyException(dbus.exceptions.DBusException):
555
 
    """A base class for D-Bus property-related exceptions
556
 
    """
557
 
    def __unicode__(self):
558
 
        return unicode(str(self))
559
 
 
560
 
 
561
 
class DBusPropertyAccessException(DBusPropertyException):
562
 
    """A property's access permissions disallows an operation.
563
 
    """
564
 
    pass
565
 
 
566
 
 
567
 
class DBusPropertyNotFound(DBusPropertyException):
568
 
    """An attempt was made to access a non-existing property.
569
 
    """
570
 
    pass
571
 
 
572
 
 
573
 
class DBusObjectWithProperties(dbus.service.Object):
574
 
    """A D-Bus object with properties.
575
 
 
576
 
    Classes inheriting from this can use the dbus_service_property
577
 
    decorator to expose methods as D-Bus properties.  It exposes the
578
 
    standard Get(), Set(), and GetAll() methods on the D-Bus.
579
 
    """
580
 
    
581
 
    @staticmethod
582
 
    def _is_dbus_property(obj):
583
 
        return getattr(obj, "_dbus_is_property", False)
584
 
    
585
 
    def _get_all_dbus_properties(self):
586
 
        """Returns a generator of (name, attribute) pairs
587
 
        """
588
 
        return ((prop._dbus_name, prop)
589
 
                for name, prop in
590
 
                inspect.getmembers(self, self._is_dbus_property))
591
 
    
592
 
    def _get_dbus_property(self, interface_name, property_name):
593
 
        """Returns a bound method if one exists which is a D-Bus
594
 
        property with the specified name and interface.
595
 
        """
596
 
        for name in (property_name,
597
 
                     property_name + "_dbus_property"):
598
 
            prop = getattr(self, name, None)
599
 
            if (prop is None
600
 
                or not self._is_dbus_property(prop)
601
 
                or prop._dbus_name != property_name
602
 
                or (interface_name and prop._dbus_interface
603
 
                    and interface_name != prop._dbus_interface)):
604
 
                continue
605
 
            return prop
606
 
        # No such property
607
 
        raise DBusPropertyNotFound(self.dbus_object_path + ":"
608
 
                                   + interface_name + "."
609
 
                                   + property_name)
610
 
    
611
 
    @dbus.service.method(dbus.PROPERTIES_IFACE, in_signature="ss",
612
 
                         out_signature="v")
613
 
    def Get(self, interface_name, property_name):
614
 
        """Standard D-Bus property Get() method, see D-Bus standard.
615
 
        """
616
 
        prop = self._get_dbus_property(interface_name, property_name)
617
 
        if prop._dbus_access == "write":
618
 
            raise DBusPropertyAccessException(property_name)
619
 
        value = prop()
620
 
        if not hasattr(value, "variant_level"):
621
 
            return value
622
 
        return type(value)(value, variant_level=value.variant_level+1)
623
 
    
624
 
    @dbus.service.method(dbus.PROPERTIES_IFACE, in_signature="ssv")
625
 
    def Set(self, interface_name, property_name, value):
626
 
        """Standard D-Bus property Set() method, see D-Bus standard.
627
 
        """
628
 
        prop = self._get_dbus_property(interface_name, property_name)
629
 
        if prop._dbus_access == "read":
630
 
            raise DBusPropertyAccessException(property_name)
631
 
        if prop._dbus_get_args_options["byte_arrays"]:
632
 
            # The byte_arrays option is not supported yet on
633
 
            # signatures other than "ay".
634
 
            if prop._dbus_signature != "ay":
635
 
                raise ValueError
636
 
            value = dbus.ByteArray(''.join(unichr(byte)
637
 
                                           for byte in value))
638
 
        prop(value)
639
 
    
640
 
    @dbus.service.method(dbus.PROPERTIES_IFACE, in_signature="s",
641
 
                         out_signature="a{sv}")
642
 
    def GetAll(self, interface_name):
643
 
        """Standard D-Bus property GetAll() method, see D-Bus
644
 
        standard.
645
 
 
646
 
        Note: Will not include properties with access="write".
647
 
        """
648
 
        all = {}
649
 
        for name, prop in self._get_all_dbus_properties():
650
 
            if (interface_name
651
 
                and interface_name != prop._dbus_interface):
652
 
                # Interface non-empty but did not match
653
 
                continue
654
 
            # Ignore write-only properties
655
 
            if prop._dbus_access == "write":
656
 
                continue
657
 
            value = prop()
658
 
            if not hasattr(value, "variant_level"):
659
 
                all[name] = value
660
 
                continue
661
 
            all[name] = type(value)(value, variant_level=
662
 
                                    value.variant_level+1)
663
 
        return dbus.Dictionary(all, signature="sv")
664
 
    
665
 
    @dbus.service.method(dbus.INTROSPECTABLE_IFACE,
666
 
                         out_signature="s",
667
 
                         path_keyword='object_path',
668
 
                         connection_keyword='connection')
669
 
    def Introspect(self, object_path, connection):
670
 
        """Standard D-Bus method, overloaded to insert property tags.
671
 
        """
672
 
        xmlstring = dbus.service.Object.Introspect(self, object_path,
673
 
                                                   connection)
674
 
        try:
675
 
            document = xml.dom.minidom.parseString(xmlstring)
676
 
            def make_tag(document, name, prop):
677
 
                e = document.createElement("property")
678
 
                e.setAttribute("name", name)
679
 
                e.setAttribute("type", prop._dbus_signature)
680
 
                e.setAttribute("access", prop._dbus_access)
681
 
                return e
682
 
            for if_tag in document.getElementsByTagName("interface"):
683
 
                for tag in (make_tag(document, name, prop)
684
 
                            for name, prop
685
 
                            in self._get_all_dbus_properties()
686
 
                            if prop._dbus_interface
687
 
                            == if_tag.getAttribute("name")):
688
 
                    if_tag.appendChild(tag)
689
 
                # Add the names to the return values for the
690
 
                # "org.freedesktop.DBus.Properties" methods
691
 
                if (if_tag.getAttribute("name")
692
 
                    == "org.freedesktop.DBus.Properties"):
693
 
                    for cn in if_tag.getElementsByTagName("method"):
694
 
                        if cn.getAttribute("name") == "Get":
695
 
                            for arg in cn.getElementsByTagName("arg"):
696
 
                                if (arg.getAttribute("direction")
697
 
                                    == "out"):
698
 
                                    arg.setAttribute("name", "value")
699
 
                        elif cn.getAttribute("name") == "GetAll":
700
 
                            for arg in cn.getElementsByTagName("arg"):
701
 
                                if (arg.getAttribute("direction")
702
 
                                    == "out"):
703
 
                                    arg.setAttribute("name", "props")
704
 
            xmlstring = document.toxml("utf-8")
705
 
            document.unlink()
706
 
        except (AttributeError, xml.dom.DOMException,
707
 
                xml.parsers.expat.ExpatError), error:
708
 
            logger.error("Failed to override Introspection method",
709
 
                         error)
710
 
        return xmlstring
711
 
 
712
 
 
713
 
class ClientDBus(Client, DBusObjectWithProperties):
714
 
    """A Client class using D-Bus
715
 
    
716
 
    Attributes:
717
 
    dbus_object_path: dbus.ObjectPath
718
 
    bus: dbus.SystemBus()
719
 
    """
720
 
    
721
 
    runtime_expansions = (Client.runtime_expansions
722
 
                          + ("dbus_object_path",))
723
 
    
724
 
    # dbus.service.Object doesn't use super(), so we can't either.
725
 
    
726
 
    def __init__(self, bus = None, *args, **kwargs):
727
 
        self._approvals_pending = 0
728
 
        self.bus = bus
729
 
        Client.__init__(self, *args, **kwargs)
730
 
        # Only now, when this client is initialized, can it show up on
731
 
        # the D-Bus
732
 
        client_object_name = unicode(self.name).translate(
733
 
            {ord("."): ord("_"),
734
 
             ord("-"): ord("_")})
735
 
        self.dbus_object_path = (dbus.ObjectPath
736
 
                                 ("/clients/" + client_object_name))
737
 
        DBusObjectWithProperties.__init__(self, self.bus,
738
 
                                          self.dbus_object_path)
739
 
        
740
 
    def _get_approvals_pending(self):
741
 
        return self._approvals_pending
742
 
    def _set_approvals_pending(self, value):
743
 
        old_value = self._approvals_pending
744
 
        self._approvals_pending = value
745
 
        bval = bool(value)
746
 
        if (hasattr(self, "dbus_object_path")
747
 
            and bval is not bool(old_value)):
748
 
            dbus_bool = dbus.Boolean(bval, variant_level=1)
749
 
            self.PropertyChanged(dbus.String("ApprovalPending"),
750
 
                                 dbus_bool)
751
 
 
752
 
    approvals_pending = property(_get_approvals_pending,
753
 
                                 _set_approvals_pending)
754
 
    del _get_approvals_pending, _set_approvals_pending
755
 
    
756
 
    @staticmethod
757
 
    def _datetime_to_dbus(dt, variant_level=0):
758
 
        """Convert a UTC datetime.datetime() to a D-Bus type."""
759
 
        return dbus.String(dt.isoformat(),
760
 
                           variant_level=variant_level)
761
 
    
762
 
    def enable(self):
763
 
        oldstate = getattr(self, "enabled", False)
764
 
        r = Client.enable(self)
765
 
        if oldstate != self.enabled:
766
 
            # Emit D-Bus signals
767
 
            self.PropertyChanged(dbus.String("Enabled"),
768
 
                                 dbus.Boolean(True, variant_level=1))
769
 
            self.PropertyChanged(
770
 
                dbus.String("LastEnabled"),
771
 
                self._datetime_to_dbus(self.last_enabled,
772
 
                                       variant_level=1))
773
 
        return r
774
 
    
775
 
    def disable(self, quiet = False):
776
 
        oldstate = getattr(self, "enabled", False)
777
 
        r = Client.disable(self, quiet=quiet)
778
 
        if not quiet and oldstate != self.enabled:
779
 
            # Emit D-Bus signal
780
 
            self.PropertyChanged(dbus.String("Enabled"),
781
 
                                 dbus.Boolean(False, variant_level=1))
782
 
        return r
783
 
    
784
 
    def __del__(self, *args, **kwargs):
785
 
        try:
786
 
            self.remove_from_connection()
787
 
        except LookupError:
788
 
            pass
789
 
        if hasattr(DBusObjectWithProperties, "__del__"):
790
 
            DBusObjectWithProperties.__del__(self, *args, **kwargs)
791
 
        Client.__del__(self, *args, **kwargs)
792
 
    
793
 
    def checker_callback(self, pid, condition, command,
794
 
                         *args, **kwargs):
795
 
        self.checker_callback_tag = None
796
 
        self.checker = None
797
 
        # Emit D-Bus signal
798
 
        self.PropertyChanged(dbus.String("CheckerRunning"),
799
 
                             dbus.Boolean(False, variant_level=1))
800
 
        if os.WIFEXITED(condition):
801
 
            exitstatus = os.WEXITSTATUS(condition)
802
 
            # Emit D-Bus signal
803
 
            self.CheckerCompleted(dbus.Int16(exitstatus),
804
 
                                  dbus.Int64(condition),
805
 
                                  dbus.String(command))
806
 
        else:
807
 
            # Emit D-Bus signal
808
 
            self.CheckerCompleted(dbus.Int16(-1),
809
 
                                  dbus.Int64(condition),
810
 
                                  dbus.String(command))
811
 
        
812
 
        return Client.checker_callback(self, pid, condition, command,
813
 
                                       *args, **kwargs)
814
 
    
815
 
    def checked_ok(self, *args, **kwargs):
816
 
        r = Client.checked_ok(self, *args, **kwargs)
817
 
        # Emit D-Bus signal
818
 
        self.PropertyChanged(
819
 
            dbus.String("LastCheckedOK"),
820
 
            (self._datetime_to_dbus(self.last_checked_ok,
821
 
                                    variant_level=1)))
822
 
        return r
823
 
    
824
 
    def need_approval(self, *args, **kwargs):
825
 
        r = Client.need_approval(self, *args, **kwargs)
826
 
        # Emit D-Bus signal
827
 
        self.PropertyChanged(
828
 
            dbus.String("LastApprovalRequest"),
829
 
            (self._datetime_to_dbus(self.last_approval_request,
830
 
                                    variant_level=1)))
831
 
        return r
832
 
    
833
 
    def start_checker(self, *args, **kwargs):
834
 
        old_checker = self.checker
835
 
        if self.checker is not None:
836
 
            old_checker_pid = self.checker.pid
837
 
        else:
838
 
            old_checker_pid = None
839
 
        r = Client.start_checker(self, *args, **kwargs)
840
 
        # Only if new checker process was started
841
 
        if (self.checker is not None
842
 
            and old_checker_pid != self.checker.pid):
843
 
            # Emit D-Bus signal
844
 
            self.CheckerStarted(self.current_checker_command)
845
 
            self.PropertyChanged(
846
 
                dbus.String("CheckerRunning"),
847
 
                dbus.Boolean(True, variant_level=1))
848
 
        return r
849
 
    
850
 
    def stop_checker(self, *args, **kwargs):
851
 
        old_checker = getattr(self, "checker", None)
852
 
        r = Client.stop_checker(self, *args, **kwargs)
853
 
        if (old_checker is not None
854
 
            and getattr(self, "checker", None) is None):
855
 
            self.PropertyChanged(dbus.String("CheckerRunning"),
856
 
                                 dbus.Boolean(False, variant_level=1))
857
 
        return r
858
 
 
859
 
    def _reset_approved(self):
860
 
        self._approved = None
861
 
        return False
862
 
    
863
 
    def approve(self, value=True):
864
 
        self.send_changedstate()
865
 
        self._approved = value
866
 
        gobject.timeout_add(self._timedelta_to_milliseconds
867
 
                            (self.approval_duration),
868
 
                            self._reset_approved)
869
 
    
870
 
    
871
 
    ## D-Bus methods, signals & properties
872
 
    _interface = "se.bsnet.fukt.Mandos.Client"
873
 
    
874
 
    ## Signals
875
 
    
876
 
    # CheckerCompleted - signal
877
 
    @dbus.service.signal(_interface, signature="nxs")
878
 
    def CheckerCompleted(self, exitcode, waitstatus, command):
879
 
        "D-Bus signal"
880
 
        pass
881
 
    
882
 
    # CheckerStarted - signal
883
 
    @dbus.service.signal(_interface, signature="s")
884
 
    def CheckerStarted(self, command):
885
 
        "D-Bus signal"
886
 
        pass
887
 
    
888
 
    # PropertyChanged - signal
889
 
    @dbus.service.signal(_interface, signature="sv")
890
 
    def PropertyChanged(self, property, value):
891
 
        "D-Bus signal"
892
 
        pass
893
 
    
894
 
    # GotSecret - signal
895
 
    @dbus.service.signal(_interface)
896
 
    def GotSecret(self):
897
 
        """D-Bus signal
898
 
        Is sent after a successful transfer of secret from the Mandos
899
 
        server to mandos-client
900
 
        """
901
 
        pass
902
 
    
903
 
    # Rejected - signal
904
 
    @dbus.service.signal(_interface, signature="s")
905
 
    def Rejected(self, reason):
906
 
        "D-Bus signal"
907
 
        pass
908
 
    
909
 
    # NeedApproval - signal
910
 
    @dbus.service.signal(_interface, signature="tb")
911
 
    def NeedApproval(self, timeout, default):
912
 
        "D-Bus signal"
913
 
        return self.need_approval()
914
 
    
915
 
    ## Methods
916
 
    
917
 
    # Approve - method
918
 
    @dbus.service.method(_interface, in_signature="b")
919
 
    def Approve(self, value):
920
 
        self.approve(value)
921
 
    
922
 
    # CheckedOK - method
923
 
    @dbus.service.method(_interface)
924
 
    def CheckedOK(self):
925
 
        return self.checked_ok()
926
 
    
927
 
    # Enable - method
928
 
    @dbus.service.method(_interface)
929
 
    def Enable(self):
930
 
        "D-Bus method"
931
 
        self.enable()
932
 
    
933
 
    # StartChecker - method
934
 
    @dbus.service.method(_interface)
935
 
    def StartChecker(self):
936
 
        "D-Bus method"
937
 
        self.start_checker()
938
 
    
939
 
    # Disable - method
940
 
    @dbus.service.method(_interface)
941
 
    def Disable(self):
942
 
        "D-Bus method"
943
 
        self.disable()
944
 
    
945
 
    # StopChecker - method
946
 
    @dbus.service.method(_interface)
947
 
    def StopChecker(self):
948
 
        self.stop_checker()
949
 
    
950
 
    ## Properties
951
 
    
952
 
    # ApprovalPending - property
953
 
    @dbus_service_property(_interface, signature="b", access="read")
954
 
    def ApprovalPending_dbus_property(self):
955
 
        return dbus.Boolean(bool(self.approvals_pending))
956
 
    
957
 
    # ApprovedByDefault - property
958
 
    @dbus_service_property(_interface, signature="b",
959
 
                           access="readwrite")
960
 
    def ApprovedByDefault_dbus_property(self, value=None):
961
 
        if value is None:       # get
962
 
            return dbus.Boolean(self.approved_by_default)
963
 
        self.approved_by_default = bool(value)
964
 
        # Emit D-Bus signal
965
 
        self.PropertyChanged(dbus.String("ApprovedByDefault"),
966
 
                             dbus.Boolean(value, variant_level=1))
967
 
    
968
 
    # ApprovalDelay - property
969
 
    @dbus_service_property(_interface, signature="t",
970
 
                           access="readwrite")
971
 
    def ApprovalDelay_dbus_property(self, value=None):
972
 
        if value is None:       # get
973
 
            return dbus.UInt64(self.approval_delay_milliseconds())
974
 
        self.approval_delay = datetime.timedelta(0, 0, 0, value)
975
 
        # Emit D-Bus signal
976
 
        self.PropertyChanged(dbus.String("ApprovalDelay"),
977
 
                             dbus.UInt64(value, variant_level=1))
978
 
    
979
 
    # ApprovalDuration - property
980
 
    @dbus_service_property(_interface, signature="t",
981
 
                           access="readwrite")
982
 
    def ApprovalDuration_dbus_property(self, value=None):
983
 
        if value is None:       # get
984
 
            return dbus.UInt64(self._timedelta_to_milliseconds(
985
 
                    self.approval_duration))
986
 
        self.approval_duration = datetime.timedelta(0, 0, 0, value)
987
 
        # Emit D-Bus signal
988
 
        self.PropertyChanged(dbus.String("ApprovalDuration"),
989
 
                             dbus.UInt64(value, variant_level=1))
990
 
    
991
 
    # Name - property
992
 
    @dbus_service_property(_interface, signature="s", access="read")
993
 
    def Name_dbus_property(self):
994
 
        return dbus.String(self.name)
995
 
    
996
 
    # Fingerprint - property
997
 
    @dbus_service_property(_interface, signature="s", access="read")
998
 
    def Fingerprint_dbus_property(self):
999
 
        return dbus.String(self.fingerprint)
1000
 
    
1001
 
    # Host - property
1002
 
    @dbus_service_property(_interface, signature="s",
1003
 
                           access="readwrite")
1004
 
    def Host_dbus_property(self, value=None):
1005
 
        if value is None:       # get
1006
 
            return dbus.String(self.host)
1007
 
        self.host = value
1008
 
        # Emit D-Bus signal
1009
 
        self.PropertyChanged(dbus.String("Host"),
1010
 
                             dbus.String(value, variant_level=1))
1011
 
    
1012
 
    # Created - property
1013
 
    @dbus_service_property(_interface, signature="s", access="read")
1014
 
    def Created_dbus_property(self):
1015
 
        return dbus.String(self._datetime_to_dbus(self.created))
1016
 
    
1017
 
    # LastEnabled - property
1018
 
    @dbus_service_property(_interface, signature="s", access="read")
1019
 
    def LastEnabled_dbus_property(self):
1020
 
        if self.last_enabled is None:
1021
 
            return dbus.String("")
1022
 
        return dbus.String(self._datetime_to_dbus(self.last_enabled))
1023
 
    
1024
 
    # Enabled - property
1025
 
    @dbus_service_property(_interface, signature="b",
1026
 
                           access="readwrite")
1027
 
    def Enabled_dbus_property(self, value=None):
1028
 
        if value is None:       # get
1029
 
            return dbus.Boolean(self.enabled)
1030
 
        if value:
1031
 
            self.enable()
1032
 
        else:
1033
 
            self.disable()
1034
 
    
1035
 
    # LastCheckedOK - property
1036
 
    @dbus_service_property(_interface, signature="s",
1037
 
                           access="readwrite")
1038
 
    def LastCheckedOK_dbus_property(self, value=None):
1039
 
        if value is not None:
1040
 
            self.checked_ok()
1041
 
            return
 
372
    def still_valid(self):
 
373
        """Has the timeout not yet passed for this client?"""
 
374
        now = datetime.datetime.now()
1042
375
        if self.last_checked_ok is None:
1043
 
            return dbus.String("")
1044
 
        return dbus.String(self._datetime_to_dbus(self
1045
 
                                                  .last_checked_ok))
1046
 
    
1047
 
    # LastApprovalRequest - property
1048
 
    @dbus_service_property(_interface, signature="s", access="read")
1049
 
    def LastApprovalRequest_dbus_property(self):
1050
 
        if self.last_approval_request is None:
1051
 
            return dbus.String("")
1052
 
        return dbus.String(self.
1053
 
                           _datetime_to_dbus(self
1054
 
                                             .last_approval_request))
1055
 
    
1056
 
    # Timeout - property
1057
 
    @dbus_service_property(_interface, signature="t",
1058
 
                           access="readwrite")
1059
 
    def Timeout_dbus_property(self, value=None):
1060
 
        if value is None:       # get
1061
 
            return dbus.UInt64(self.timeout_milliseconds())
1062
 
        self.timeout = datetime.timedelta(0, 0, 0, value)
1063
 
        # Emit D-Bus signal
1064
 
        self.PropertyChanged(dbus.String("Timeout"),
1065
 
                             dbus.UInt64(value, variant_level=1))
1066
 
        if getattr(self, "disable_initiator_tag", None) is None:
1067
 
            return
1068
 
        # Reschedule timeout
1069
 
        gobject.source_remove(self.disable_initiator_tag)
1070
 
        self.disable_initiator_tag = None
1071
 
        time_to_die = (self.
1072
 
                       _timedelta_to_milliseconds((self
1073
 
                                                   .last_checked_ok
1074
 
                                                   + self.timeout)
1075
 
                                                  - datetime.datetime
1076
 
                                                  .utcnow()))
1077
 
        if time_to_die <= 0:
1078
 
            # The timeout has passed
1079
 
            self.disable()
1080
 
        else:
1081
 
            self.disable_initiator_tag = (gobject.timeout_add
1082
 
                                          (time_to_die, self.disable))
1083
 
    
1084
 
    # Interval - property
1085
 
    @dbus_service_property(_interface, signature="t",
1086
 
                           access="readwrite")
1087
 
    def Interval_dbus_property(self, value=None):
1088
 
        if value is None:       # get
1089
 
            return dbus.UInt64(self.interval_milliseconds())
1090
 
        self.interval = datetime.timedelta(0, 0, 0, value)
1091
 
        # Emit D-Bus signal
1092
 
        self.PropertyChanged(dbus.String("Interval"),
1093
 
                             dbus.UInt64(value, variant_level=1))
1094
 
        if getattr(self, "checker_initiator_tag", None) is None:
1095
 
            return
1096
 
        # Reschedule checker run
1097
 
        gobject.source_remove(self.checker_initiator_tag)
1098
 
        self.checker_initiator_tag = (gobject.timeout_add
1099
 
                                      (value, self.start_checker))
1100
 
        self.start_checker()    # Start one now, too
1101
 
 
1102
 
    # Checker - property
1103
 
    @dbus_service_property(_interface, signature="s",
1104
 
                           access="readwrite")
1105
 
    def Checker_dbus_property(self, value=None):
1106
 
        if value is None:       # get
1107
 
            return dbus.String(self.checker_command)
1108
 
        self.checker_command = value
1109
 
        # Emit D-Bus signal
1110
 
        self.PropertyChanged(dbus.String("Checker"),
1111
 
                             dbus.String(self.checker_command,
1112
 
                                         variant_level=1))
1113
 
    
1114
 
    # CheckerRunning - property
1115
 
    @dbus_service_property(_interface, signature="b",
1116
 
                           access="readwrite")
1117
 
    def CheckerRunning_dbus_property(self, value=None):
1118
 
        if value is None:       # get
1119
 
            return dbus.Boolean(self.checker is not None)
1120
 
        if value:
1121
 
            self.start_checker()
1122
 
        else:
1123
 
            self.stop_checker()
1124
 
    
1125
 
    # ObjectPath - property
1126
 
    @dbus_service_property(_interface, signature="o", access="read")
1127
 
    def ObjectPath_dbus_property(self):
1128
 
        return self.dbus_object_path # is already a dbus.ObjectPath
1129
 
    
1130
 
    # Secret = property
1131
 
    @dbus_service_property(_interface, signature="ay",
1132
 
                           access="write", byte_arrays=True)
1133
 
    def Secret_dbus_property(self, value):
1134
 
        self.secret = str(value)
1135
 
    
1136
 
    del _interface
1137
 
 
1138
 
 
1139
 
class ProxyClient(object):
1140
 
    def __init__(self, child_pipe, fpr, address):
1141
 
        self._pipe = child_pipe
1142
 
        self._pipe.send(('init', fpr, address))
1143
 
        if not self._pipe.recv():
1144
 
            raise KeyError()
1145
 
 
1146
 
    def __getattribute__(self, name):
1147
 
        if(name == '_pipe'):
1148
 
            return super(ProxyClient, self).__getattribute__(name)
1149
 
        self._pipe.send(('getattr', name))
1150
 
        data = self._pipe.recv()
1151
 
        if data[0] == 'data':
1152
 
            return data[1]
1153
 
        if data[0] == 'function':
1154
 
            def func(*args, **kwargs):
1155
 
                self._pipe.send(('funcall', name, args, kwargs))
1156
 
                return self._pipe.recv()[1]
1157
 
            return func
1158
 
 
1159
 
    def __setattr__(self, name, value):
1160
 
        if(name == '_pipe'):
1161
 
            return super(ProxyClient, self).__setattr__(name, value)
1162
 
        self._pipe.send(('setattr', name, value))
1163
 
 
1164
 
 
1165
 
class ClientHandler(socketserver.BaseRequestHandler, object):
1166
 
    """A class to handle client connections.
1167
 
    
1168
 
    Instantiated once for each connection to handle it.
 
376
            return now < (self.created + self.timeout)
 
377
        else:
 
378
            return now < (self.last_checked_ok + self.timeout)
 
379
 
 
380
 
 
381
def peer_certificate(session):
 
382
    "Return the peer's OpenPGP certificate as a bytestring"
 
383
    # If not an OpenPGP certificate...
 
384
    if gnutls.library.functions.gnutls_certificate_type_get\
 
385
            (session._c_object) \
 
386
           != gnutls.library.constants.GNUTLS_CRT_OPENPGP:
 
387
        # ...do the normal thing
 
388
        return session.peer_certificate
 
389
    list_size = ctypes.c_uint()
 
390
    cert_list = gnutls.library.functions.gnutls_certificate_get_peers\
 
391
        (session._c_object, ctypes.byref(list_size))
 
392
    if list_size.value == 0:
 
393
        return None
 
394
    cert = cert_list[0]
 
395
    return ctypes.string_at(cert.data, cert.size)
 
396
 
 
397
 
 
398
def fingerprint(openpgp):
 
399
    "Convert an OpenPGP bytestring to a hexdigit fingerprint string"
 
400
    # New GnuTLS "datum" with the OpenPGP public key
 
401
    datum = gnutls.library.types.gnutls_datum_t\
 
402
        (ctypes.cast(ctypes.c_char_p(openpgp),
 
403
                     ctypes.POINTER(ctypes.c_ubyte)),
 
404
         ctypes.c_uint(len(openpgp)))
 
405
    # New empty GnuTLS certificate
 
406
    crt = gnutls.library.types.gnutls_openpgp_crt_t()
 
407
    gnutls.library.functions.gnutls_openpgp_crt_init\
 
408
        (ctypes.byref(crt))
 
409
    # Import the OpenPGP public key into the certificate
 
410
    gnutls.library.functions.gnutls_openpgp_crt_import\
 
411
                    (crt, ctypes.byref(datum),
 
412
                     gnutls.library.constants.GNUTLS_OPENPGP_FMT_RAW)
 
413
    # Verify the self signature in the key
 
414
    crtverify = ctypes.c_uint();
 
415
    gnutls.library.functions.gnutls_openpgp_crt_verify_self\
 
416
        (crt, ctypes.c_uint(0), ctypes.byref(crtverify))
 
417
    if crtverify != 0:
 
418
        gnutls.library.functions.gnutls_openpgp_crt_deinit(crt)
 
419
        raise gnutls.errors.CertificateSecurityError("Verify failed")
 
420
    # New buffer for the fingerprint
 
421
    buffer = ctypes.create_string_buffer(20)
 
422
    buffer_length = ctypes.c_size_t()
 
423
    # Get the fingerprint from the certificate into the buffer
 
424
    gnutls.library.functions.gnutls_openpgp_crt_get_fingerprint\
 
425
        (crt, ctypes.byref(buffer), ctypes.byref(buffer_length))
 
426
    # Deinit the certificate
 
427
    gnutls.library.functions.gnutls_openpgp_crt_deinit(crt)
 
428
    # Convert the buffer to a Python bytestring
 
429
    fpr = ctypes.string_at(buffer, buffer_length.value)
 
430
    # Convert the bytestring to hexadecimal notation
 
431
    hex_fpr = u''.join(u"%02X" % ord(char) for char in fpr)
 
432
    return hex_fpr
 
433
 
 
434
 
 
435
class tcp_handler(SocketServer.BaseRequestHandler, object):
 
436
    """A TCP request handler class.
 
437
    Instantiated by IPv6_TCPServer for each request to handle it.
1169
438
    Note: This will run in its own forked process."""
1170
439
    
1171
440
    def handle(self):
1172
 
        with contextlib.closing(self.server.child_pipe) as child_pipe:
1173
 
            logger.info("TCP connection from: %s",
1174
 
                        unicode(self.client_address))
1175
 
            logger.debug("Pipe FD: %d",
1176
 
                         self.server.child_pipe.fileno())
1177
 
 
1178
 
            session = (gnutls.connection
1179
 
                       .ClientSession(self.request,
1180
 
                                      gnutls.connection
1181
 
                                      .X509Credentials()))
1182
 
 
1183
 
            # Note: gnutls.connection.X509Credentials is really a
1184
 
            # generic GnuTLS certificate credentials object so long as
1185
 
            # no X.509 keys are added to it.  Therefore, we can use it
1186
 
            # here despite using OpenPGP certificates.
1187
 
 
1188
 
            #priority = ':'.join(("NONE", "+VERS-TLS1.1",
1189
 
            #                      "+AES-256-CBC", "+SHA1",
1190
 
            #                      "+COMP-NULL", "+CTYPE-OPENPGP",
1191
 
            #                      "+DHE-DSS"))
1192
 
            # Use a fallback default, since this MUST be set.
1193
 
            priority = self.server.gnutls_priority
1194
 
            if priority is None:
1195
 
                priority = "NORMAL"
1196
 
            (gnutls.library.functions
1197
 
             .gnutls_priority_set_direct(session._c_object,
1198
 
                                         priority, None))
1199
 
 
1200
 
            # Start communication using the Mandos protocol
1201
 
            # Get protocol number
1202
 
            line = self.request.makefile().readline()
1203
 
            logger.debug("Protocol version: %r", line)
1204
 
            try:
1205
 
                if int(line.strip().split()[0]) > 1:
1206
 
                    raise RuntimeError
1207
 
            except (ValueError, IndexError, RuntimeError), error:
1208
 
                logger.error("Unknown protocol version: %s", error)
1209
 
                return
1210
 
 
1211
 
            # Start GnuTLS connection
1212
 
            try:
1213
 
                session.handshake()
1214
 
            except gnutls.errors.GNUTLSError, error:
1215
 
                logger.warning("Handshake failed: %s", error)
1216
 
                # Do not run session.bye() here: the session is not
1217
 
                # established.  Just abandon the request.
1218
 
                return
1219
 
            logger.debug("Handshake succeeded")
1220
 
 
1221
 
            approval_required = False
1222
 
            try:
1223
 
                try:
1224
 
                    fpr = self.fingerprint(self.peer_certificate
1225
 
                                           (session))
1226
 
                except (TypeError, gnutls.errors.GNUTLSError), error:
1227
 
                    logger.warning("Bad certificate: %s", error)
1228
 
                    return
1229
 
                logger.debug("Fingerprint: %s", fpr)
1230
 
 
1231
 
                try:
1232
 
                    client = ProxyClient(child_pipe, fpr,
1233
 
                                         self.client_address)
1234
 
                except KeyError:
1235
 
                    return
1236
 
                
1237
 
                if client.approval_delay:
1238
 
                    delay = client.approval_delay
1239
 
                    client.approvals_pending += 1
1240
 
                    approval_required = True
1241
 
                
1242
 
                while True:
1243
 
                    if not client.enabled:
1244
 
                        logger.warning("Client %s is disabled",
1245
 
                                       client.name)
1246
 
                        if self.server.use_dbus:
1247
 
                            # Emit D-Bus signal
1248
 
                            client.Rejected("Disabled")                    
1249
 
                        return
1250
 
                    
1251
 
                    if client._approved or not client.approval_delay:
1252
 
                        #We are approved or approval is disabled
1253
 
                        break
1254
 
                    elif client._approved is None:
1255
 
                        logger.info("Client %s needs approval",
1256
 
                                    client.name)
1257
 
                        if self.server.use_dbus:
1258
 
                            # Emit D-Bus signal
1259
 
                            client.NeedApproval(
1260
 
                                client.approval_delay_milliseconds(),
1261
 
                                client.approved_by_default)
1262
 
                    else:
1263
 
                        logger.warning("Client %s was not approved",
1264
 
                                       client.name)
1265
 
                        if self.server.use_dbus:
1266
 
                            # Emit D-Bus signal
1267
 
                            client.Rejected("Denied")
1268
 
                        return
1269
 
                    
1270
 
                    #wait until timeout or approved
1271
 
                    #x = float(client._timedelta_to_milliseconds(delay))
1272
 
                    time = datetime.datetime.now()
1273
 
                    client.changedstate.acquire()
1274
 
                    client.changedstate.wait(float(client._timedelta_to_milliseconds(delay) / 1000))
1275
 
                    client.changedstate.release()
1276
 
                    time2 = datetime.datetime.now()
1277
 
                    if (time2 - time) >= delay:
1278
 
                        if not client.approved_by_default:
1279
 
                            logger.warning("Client %s timed out while"
1280
 
                                           " waiting for approval",
1281
 
                                           client.name)
1282
 
                            if self.server.use_dbus:
1283
 
                                # Emit D-Bus signal
1284
 
                                client.Rejected("Approval timed out")
1285
 
                            return
1286
 
                        else:
1287
 
                            break
1288
 
                    else:
1289
 
                        delay -= time2 - time
1290
 
                
1291
 
                sent_size = 0
1292
 
                while sent_size < len(client.secret):
1293
 
                    try:
1294
 
                        sent = session.send(client.secret[sent_size:])
1295
 
                    except (gnutls.errors.GNUTLSError), error:
1296
 
                        logger.warning("gnutls send failed")
1297
 
                        return
1298
 
                    logger.debug("Sent: %d, remaining: %d",
1299
 
                                 sent, len(client.secret)
1300
 
                                 - (sent_size + sent))
1301
 
                    sent_size += sent
1302
 
 
1303
 
                logger.info("Sending secret to %s", client.name)
1304
 
                # bump the timeout as if seen
1305
 
                client.checked_ok()
1306
 
                if self.server.use_dbus:
1307
 
                    # Emit D-Bus signal
1308
 
                    client.GotSecret()
1309
 
            
1310
 
            finally:
1311
 
                if approval_required:
1312
 
                    client.approvals_pending -= 1
1313
 
                try:
1314
 
                    session.bye()
1315
 
                except (gnutls.errors.GNUTLSError), error:
1316
 
                    logger.warning("GnuTLS bye failed")
1317
 
    
1318
 
    @staticmethod
1319
 
    def peer_certificate(session):
1320
 
        "Return the peer's OpenPGP certificate as a bytestring"
1321
 
        # If not an OpenPGP certificate...
1322
 
        if (gnutls.library.functions
1323
 
            .gnutls_certificate_type_get(session._c_object)
1324
 
            != gnutls.library.constants.GNUTLS_CRT_OPENPGP):
1325
 
            # ...do the normal thing
1326
 
            return session.peer_certificate
1327
 
        list_size = ctypes.c_uint(1)
1328
 
        cert_list = (gnutls.library.functions
1329
 
                     .gnutls_certificate_get_peers
1330
 
                     (session._c_object, ctypes.byref(list_size)))
1331
 
        if not bool(cert_list) and list_size.value != 0:
1332
 
            raise gnutls.errors.GNUTLSError("error getting peer"
1333
 
                                            " certificate")
1334
 
        if list_size.value == 0:
1335
 
            return None
1336
 
        cert = cert_list[0]
1337
 
        return ctypes.string_at(cert.data, cert.size)
1338
 
    
1339
 
    @staticmethod
1340
 
    def fingerprint(openpgp):
1341
 
        "Convert an OpenPGP bytestring to a hexdigit fingerprint"
1342
 
        # New GnuTLS "datum" with the OpenPGP public key
1343
 
        datum = (gnutls.library.types
1344
 
                 .gnutls_datum_t(ctypes.cast(ctypes.c_char_p(openpgp),
1345
 
                                             ctypes.POINTER
1346
 
                                             (ctypes.c_ubyte)),
1347
 
                                 ctypes.c_uint(len(openpgp))))
1348
 
        # New empty GnuTLS certificate
1349
 
        crt = gnutls.library.types.gnutls_openpgp_crt_t()
1350
 
        (gnutls.library.functions
1351
 
         .gnutls_openpgp_crt_init(ctypes.byref(crt)))
1352
 
        # Import the OpenPGP public key into the certificate
1353
 
        (gnutls.library.functions
1354
 
         .gnutls_openpgp_crt_import(crt, ctypes.byref(datum),
1355
 
                                    gnutls.library.constants
1356
 
                                    .GNUTLS_OPENPGP_FMT_RAW))
1357
 
        # Verify the self signature in the key
1358
 
        crtverify = ctypes.c_uint()
1359
 
        (gnutls.library.functions
1360
 
         .gnutls_openpgp_crt_verify_self(crt, 0,
1361
 
                                         ctypes.byref(crtverify)))
1362
 
        if crtverify.value != 0:
1363
 
            gnutls.library.functions.gnutls_openpgp_crt_deinit(crt)
1364
 
            raise (gnutls.errors.CertificateSecurityError
1365
 
                   ("Verify failed"))
1366
 
        # New buffer for the fingerprint
1367
 
        buf = ctypes.create_string_buffer(20)
1368
 
        buf_len = ctypes.c_size_t()
1369
 
        # Get the fingerprint from the certificate into the buffer
1370
 
        (gnutls.library.functions
1371
 
         .gnutls_openpgp_crt_get_fingerprint(crt, ctypes.byref(buf),
1372
 
                                             ctypes.byref(buf_len)))
1373
 
        # Deinit the certificate
1374
 
        gnutls.library.functions.gnutls_openpgp_crt_deinit(crt)
1375
 
        # Convert the buffer to a Python bytestring
1376
 
        fpr = ctypes.string_at(buf, buf_len.value)
1377
 
        # Convert the bytestring to hexadecimal notation
1378
 
        hex_fpr = ''.join("%02X" % ord(char) for char in fpr)
1379
 
        return hex_fpr
1380
 
 
1381
 
 
1382
 
class MultiprocessingMixIn(object):
1383
 
    """Like socketserver.ThreadingMixIn, but with multiprocessing"""
1384
 
    def sub_process_main(self, request, address):
1385
 
        try:
1386
 
            self.finish_request(request, address)
1387
 
        except:
1388
 
            self.handle_error(request, address)
1389
 
        self.close_request(request)
1390
 
            
1391
 
    def process_request(self, request, address):
1392
 
        """Start a new process to process the request."""
1393
 
        multiprocessing.Process(target = self.sub_process_main,
1394
 
                                args = (request, address)).start()
1395
 
 
1396
 
class MultiprocessingMixInWithPipe(MultiprocessingMixIn, object):
1397
 
    """ adds a pipe to the MixIn """
1398
 
    def process_request(self, request, client_address):
1399
 
        """Overrides and wraps the original process_request().
1400
 
        
1401
 
        This function creates a new pipe in self.pipe
1402
 
        """
1403
 
        parent_pipe, self.child_pipe = multiprocessing.Pipe()
1404
 
 
1405
 
        super(MultiprocessingMixInWithPipe,
1406
 
              self).process_request(request, client_address)
1407
 
        self.child_pipe.close()
1408
 
        self.add_pipe(parent_pipe)
1409
 
 
1410
 
    def add_pipe(self, parent_pipe):
1411
 
        """Dummy function; override as necessary"""
1412
 
        raise NotImplementedError
1413
 
 
1414
 
class IPv6_TCPServer(MultiprocessingMixInWithPipe,
1415
 
                     socketserver.TCPServer, object):
1416
 
    """IPv6-capable TCP server.  Accepts 'None' as address and/or port
1417
 
    
 
441
        logger.info(u"TCP connection from: %s",
 
442
                     unicode(self.client_address))
 
443
        session = gnutls.connection.ClientSession\
 
444
                  (self.request, gnutls.connection.X509Credentials())
 
445
        
 
446
        line = self.request.makefile().readline()
 
447
        logger.debug(u"Protocol version: %r", line)
 
448
        try:
 
449
            if int(line.strip().split()[0]) > 1:
 
450
                raise RuntimeError
 
451
        except (ValueError, IndexError, RuntimeError), error:
 
452
            logger.error(u"Unknown protocol version: %s", error)
 
453
            return
 
454
        
 
455
        # Note: gnutls.connection.X509Credentials is really a generic
 
456
        # GnuTLS certificate credentials object so long as no X.509
 
457
        # keys are added to it.  Therefore, we can use it here despite
 
458
        # using OpenPGP certificates.
 
459
        
 
460
        #priority = ':'.join(("NONE", "+VERS-TLS1.1", "+AES-256-CBC",
 
461
        #                "+SHA1", "+COMP-NULL", "+CTYPE-OPENPGP",
 
462
        #                "+DHE-DSS"))
 
463
        priority = "NORMAL"             # Fallback default, since this
 
464
                                        # MUST be set.
 
465
        if self.server.settings["priority"]:
 
466
            priority = self.server.settings["priority"]
 
467
        gnutls.library.functions.gnutls_priority_set_direct\
 
468
            (session._c_object, priority, None);
 
469
        
 
470
        try:
 
471
            session.handshake()
 
472
        except gnutls.errors.GNUTLSError, error:
 
473
            logger.warning(u"Handshake failed: %s", error)
 
474
            # Do not run session.bye() here: the session is not
 
475
            # established.  Just abandon the request.
 
476
            return
 
477
        try:
 
478
            fpr = fingerprint(peer_certificate(session))
 
479
        except (TypeError, gnutls.errors.GNUTLSError), error:
 
480
            logger.warning(u"Bad certificate: %s", error)
 
481
            session.bye()
 
482
            return
 
483
        logger.debug(u"Fingerprint: %s", fpr)
 
484
        client = None
 
485
        for c in self.server.clients:
 
486
            if c.fingerprint == fpr:
 
487
                client = c
 
488
                break
 
489
        if not client:
 
490
            logger.warning(u"Client not found for fingerprint: %s",
 
491
                           fpr)
 
492
            session.bye()
 
493
            return
 
494
        # Have to check if client.still_valid(), since it is possible
 
495
        # that the client timed out while establishing the GnuTLS
 
496
        # session.
 
497
        if not client.still_valid():
 
498
            logger.warning(u"Client %(name)s is invalid",
 
499
                           vars(client))
 
500
            session.bye()
 
501
            return
 
502
        sent_size = 0
 
503
        while sent_size < len(client.secret):
 
504
            sent = session.send(client.secret[sent_size:])
 
505
            logger.debug(u"Sent: %d, remaining: %d",
 
506
                         sent, len(client.secret)
 
507
                         - (sent_size + sent))
 
508
            sent_size += sent
 
509
        session.bye()
 
510
 
 
511
 
 
512
class IPv6_TCPServer(SocketServer.ForkingTCPServer, object):
 
513
    """IPv6 TCP server.  Accepts 'None' as address and/or port.
1418
514
    Attributes:
1419
 
        enabled:        Boolean; whether this server is activated yet
1420
 
        interface:      None or a network interface name (string)
1421
 
        use_ipv6:       Boolean; to use IPv6 or not
 
515
        settings:       Server settings
 
516
        clients:        Set() of Client objects
1422
517
    """
1423
 
    def __init__(self, server_address, RequestHandlerClass,
1424
 
                 interface=None, use_ipv6=True):
1425
 
        self.interface = interface
1426
 
        if use_ipv6:
1427
 
            self.address_family = socket.AF_INET6
1428
 
        socketserver.TCPServer.__init__(self, server_address,
1429
 
                                        RequestHandlerClass)
 
518
    address_family = socket.AF_INET6
 
519
    def __init__(self, *args, **kwargs):
 
520
        if "settings" in kwargs:
 
521
            self.settings = kwargs["settings"]
 
522
            del kwargs["settings"]
 
523
        if "clients" in kwargs:
 
524
            self.clients = kwargs["clients"]
 
525
            del kwargs["clients"]
 
526
        return super(type(self), self).__init__(*args, **kwargs)
1430
527
    def server_bind(self):
1431
528
        """This overrides the normal server_bind() function
1432
529
        to bind to an interface if one was specified, and also NOT to
1433
530
        bind to an address or port if they were not specified."""
1434
 
        if self.interface is not None:
1435
 
            if SO_BINDTODEVICE is None:
1436
 
                logger.error("SO_BINDTODEVICE does not exist;"
1437
 
                             " cannot bind to interface %s",
1438
 
                             self.interface)
1439
 
            else:
1440
 
                try:
1441
 
                    self.socket.setsockopt(socket.SOL_SOCKET,
1442
 
                                           SO_BINDTODEVICE,
1443
 
                                           str(self.interface
1444
 
                                               + '\0'))
1445
 
                except socket.error, error:
1446
 
                    if error[0] == errno.EPERM:
1447
 
                        logger.error("No permission to"
1448
 
                                     " bind to interface %s",
1449
 
                                     self.interface)
1450
 
                    elif error[0] == errno.ENOPROTOOPT:
1451
 
                        logger.error("SO_BINDTODEVICE not available;"
1452
 
                                     " cannot bind to interface %s",
1453
 
                                     self.interface)
1454
 
                    else:
1455
 
                        raise
 
531
        if self.settings["interface"]:
 
532
            # 25 is from /usr/include/asm-i486/socket.h
 
533
            SO_BINDTODEVICE = getattr(socket, "SO_BINDTODEVICE", 25)
 
534
            try:
 
535
                self.socket.setsockopt(socket.SOL_SOCKET,
 
536
                                       SO_BINDTODEVICE,
 
537
                                       self.settings["interface"])
 
538
            except socket.error, error:
 
539
                if error[0] == errno.EPERM:
 
540
                    logger.error(u"No permission to"
 
541
                                 u" bind to interface %s",
 
542
                                 self.settings["interface"])
 
543
                else:
 
544
                    raise error
1456
545
        # Only bind(2) the socket if we really need to.
1457
546
        if self.server_address[0] or self.server_address[1]:
1458
547
            if not self.server_address[0]:
1459
 
                if self.address_family == socket.AF_INET6:
1460
 
                    any_address = "::" # in6addr_any
1461
 
                else:
1462
 
                    any_address = socket.INADDR_ANY
1463
 
                self.server_address = (any_address,
 
548
                in6addr_any = "::"
 
549
                self.server_address = (in6addr_any,
1464
550
                                       self.server_address[1])
1465
551
            elif not self.server_address[1]:
1466
552
                self.server_address = (self.server_address[0],
1467
553
                                       0)
1468
 
#                 if self.interface:
 
554
#                 if self.settings["interface"]:
1469
555
#                     self.server_address = (self.server_address[0],
1470
556
#                                            0, # port
1471
557
#                                            0, # flowinfo
1472
558
#                                            if_nametoindex
1473
 
#                                            (self.interface))
1474
 
            return socketserver.TCPServer.server_bind(self)
1475
 
 
1476
 
 
1477
 
class MandosServer(IPv6_TCPServer):
1478
 
    """Mandos server.
1479
 
    
1480
 
    Attributes:
1481
 
        clients:        set of Client objects
1482
 
        gnutls_priority GnuTLS priority string
1483
 
        use_dbus:       Boolean; to emit D-Bus signals or not
1484
 
    
1485
 
    Assumes a gobject.MainLoop event loop.
1486
 
    """
1487
 
    def __init__(self, server_address, RequestHandlerClass,
1488
 
                 interface=None, use_ipv6=True, clients=None,
1489
 
                 gnutls_priority=None, use_dbus=True):
1490
 
        self.enabled = False
1491
 
        self.clients = clients
1492
 
        if self.clients is None:
1493
 
            self.clients = set()
1494
 
        self.use_dbus = use_dbus
1495
 
        self.gnutls_priority = gnutls_priority
1496
 
        IPv6_TCPServer.__init__(self, server_address,
1497
 
                                RequestHandlerClass,
1498
 
                                interface = interface,
1499
 
                                use_ipv6 = use_ipv6)
1500
 
    def server_activate(self):
1501
 
        if self.enabled:
1502
 
            return socketserver.TCPServer.server_activate(self)
1503
 
    def enable(self):
1504
 
        self.enabled = True
1505
 
    def add_pipe(self, parent_pipe):
1506
 
        # Call "handle_ipc" for both data and EOF events
1507
 
        gobject.io_add_watch(parent_pipe.fileno(),
1508
 
                             gobject.IO_IN | gobject.IO_HUP,
1509
 
                             functools.partial(self.handle_ipc,
1510
 
                                               parent_pipe = parent_pipe))
1511
 
        
1512
 
    def handle_ipc(self, source, condition, parent_pipe=None,
1513
 
                   client_object=None):
1514
 
        condition_names = {
1515
 
            gobject.IO_IN: "IN",   # There is data to read.
1516
 
            gobject.IO_OUT: "OUT", # Data can be written (without
1517
 
                                    # blocking).
1518
 
            gobject.IO_PRI: "PRI", # There is urgent data to read.
1519
 
            gobject.IO_ERR: "ERR", # Error condition.
1520
 
            gobject.IO_HUP: "HUP"  # Hung up (the connection has been
1521
 
                                    # broken, usually for pipes and
1522
 
                                    # sockets).
1523
 
            }
1524
 
        conditions_string = ' | '.join(name
1525
 
                                       for cond, name in
1526
 
                                       condition_names.iteritems()
1527
 
                                       if cond & condition)
1528
 
        # error or the other end of multiprocessing.Pipe has closed
1529
 
        if condition & (gobject.IO_ERR | condition & gobject.IO_HUP):
1530
 
            return False
1531
 
        
1532
 
        # Read a request from the child
1533
 
        request = parent_pipe.recv()
1534
 
        command = request[0]
1535
 
        
1536
 
        if command == 'init':
1537
 
            fpr = request[1]
1538
 
            address = request[2]
1539
 
            
1540
 
            for c in self.clients:
1541
 
                if c.fingerprint == fpr:
1542
 
                    client = c
1543
 
                    break
1544
 
            else:
1545
 
                logger.warning("Client not found for fingerprint: %s, ad"
1546
 
                               "dress: %s", fpr, address)
1547
 
                if self.use_dbus:
1548
 
                    # Emit D-Bus signal
1549
 
                    mandos_dbus_service.ClientNotFound(fpr, address[0])
1550
 
                parent_pipe.send(False)
1551
 
                return False
1552
 
            
1553
 
            gobject.io_add_watch(parent_pipe.fileno(),
1554
 
                                 gobject.IO_IN | gobject.IO_HUP,
1555
 
                                 functools.partial(self.handle_ipc,
1556
 
                                                   parent_pipe = parent_pipe,
1557
 
                                                   client_object = client))
1558
 
            parent_pipe.send(True)
1559
 
            # remove the old hook in favor of the new above hook on same fileno
1560
 
            return False
1561
 
        if command == 'funcall':
1562
 
            funcname = request[1]
1563
 
            args = request[2]
1564
 
            kwargs = request[3]
1565
 
            
1566
 
            parent_pipe.send(('data', getattr(client_object, funcname)(*args, **kwargs)))
1567
 
 
1568
 
        if command == 'getattr':
1569
 
            attrname = request[1]
1570
 
            if callable(client_object.__getattribute__(attrname)):
1571
 
                parent_pipe.send(('function',))
1572
 
            else:
1573
 
                parent_pipe.send(('data', client_object.__getattribute__(attrname)))
1574
 
        
1575
 
        if command == 'setattr':
1576
 
            attrname = request[1]
1577
 
            value = request[2]
1578
 
            setattr(client_object, attrname, value)
1579
 
 
1580
 
        return True
 
559
#                                            (self.settings
 
560
#                                             ["interface"]))
 
561
            return super(type(self), self).server_bind()
1581
562
 
1582
563
 
1583
564
def string_to_delta(interval):
1584
565
    """Parse a string and return a datetime.timedelta
1585
 
    
 
566
 
1586
567
    >>> string_to_delta('7d')
1587
568
    datetime.timedelta(7)
1588
569
    >>> string_to_delta('60s')
1591
572
    datetime.timedelta(0, 3600)
1592
573
    >>> string_to_delta('24h')
1593
574
    datetime.timedelta(1)
1594
 
    >>> string_to_delta('1w')
 
575
    >>> string_to_delta(u'1w')
1595
576
    datetime.timedelta(7)
1596
577
    >>> string_to_delta('5m 30s')
1597
578
    datetime.timedelta(0, 330)
1599
580
    timevalue = datetime.timedelta(0)
1600
581
    for s in interval.split():
1601
582
        try:
1602
 
            suffix = unicode(s[-1])
1603
 
            value = int(s[:-1])
1604
 
            if suffix == "d":
 
583
            suffix=unicode(s[-1])
 
584
            value=int(s[:-1])
 
585
            if suffix == u"d":
1605
586
                delta = datetime.timedelta(value)
1606
 
            elif suffix == "s":
 
587
            elif suffix == u"s":
1607
588
                delta = datetime.timedelta(0, value)
1608
 
            elif suffix == "m":
 
589
            elif suffix == u"m":
1609
590
                delta = datetime.timedelta(0, 0, 0, 0, value)
1610
 
            elif suffix == "h":
 
591
            elif suffix == u"h":
1611
592
                delta = datetime.timedelta(0, 0, 0, 0, 0, value)
1612
 
            elif suffix == "w":
 
593
            elif suffix == u"w":
1613
594
                delta = datetime.timedelta(0, 0, 0, 0, 0, 0, value)
1614
595
            else:
1615
 
                raise ValueError("Unknown suffix %r" % suffix)
1616
 
        except (ValueError, IndexError), e:
1617
 
            raise ValueError(*(e.args))
 
596
                raise ValueError
 
597
        except (ValueError, IndexError):
 
598
            raise ValueError
1618
599
        timevalue += delta
1619
600
    return timevalue
1620
601
 
1621
602
 
 
603
def server_state_changed(state):
 
604
    """Derived from the Avahi example code"""
 
605
    if state == avahi.SERVER_COLLISION:
 
606
        logger.error(u"Server name collision")
 
607
        service.remove()
 
608
    elif state == avahi.SERVER_RUNNING:
 
609
        service.add()
 
610
 
 
611
 
 
612
def entry_group_state_changed(state, error):
 
613
    """Derived from the Avahi example code"""
 
614
    logger.debug(u"state change: %i", state)
 
615
    
 
616
    if state == avahi.ENTRY_GROUP_ESTABLISHED:
 
617
        logger.debug(u"Service established.")
 
618
    elif state == avahi.ENTRY_GROUP_COLLISION:
 
619
        logger.warning(u"Service name collision.")
 
620
        service.rename()
 
621
    elif state == avahi.ENTRY_GROUP_FAILURE:
 
622
        logger.critical(u"Error in group state changed %s",
 
623
                        unicode(error))
 
624
        raise AvahiGroupError("State changed: %s", str(error))
 
625
 
1622
626
def if_nametoindex(interface):
1623
 
    """Call the C function if_nametoindex(), or equivalent
1624
 
    
1625
 
    Note: This function cannot accept a unicode string."""
 
627
    """Call the C function if_nametoindex(), or equivalent"""
1626
628
    global if_nametoindex
1627
629
    try:
1628
 
        if_nametoindex = (ctypes.cdll.LoadLibrary
1629
 
                          (ctypes.util.find_library("c"))
1630
 
                          .if_nametoindex)
 
630
        if "ctypes.util" not in sys.modules:
 
631
            import ctypes.util
 
632
        if_nametoindex = ctypes.cdll.LoadLibrary\
 
633
            (ctypes.util.find_library("c")).if_nametoindex
1631
634
    except (OSError, AttributeError):
1632
 
        logger.warning("Doing if_nametoindex the hard way")
 
635
        if "struct" not in sys.modules:
 
636
            import struct
 
637
        if "fcntl" not in sys.modules:
 
638
            import fcntl
1633
639
        def if_nametoindex(interface):
1634
640
            "Get an interface index the hard way, i.e. using fcntl()"
1635
641
            SIOCGIFINDEX = 0x8933  # From /usr/include/linux/sockios.h
1636
 
            with contextlib.closing(socket.socket()) as s:
1637
 
                ifreq = fcntl.ioctl(s, SIOCGIFINDEX,
1638
 
                                    struct.pack(str("16s16x"),
1639
 
                                                interface))
1640
 
            interface_index = struct.unpack(str("I"),
1641
 
                                            ifreq[16:20])[0]
 
642
            s = socket.socket()
 
643
            ifreq = fcntl.ioctl(s, SIOCGIFINDEX,
 
644
                                struct.pack("16s16x", interface))
 
645
            s.close()
 
646
            interface_index = struct.unpack("I", ifreq[16:20])[0]
1642
647
            return interface_index
1643
648
    return if_nametoindex(interface)
1644
649
 
1645
650
 
1646
651
def daemon(nochdir = False, noclose = False):
1647
652
    """See daemon(3).  Standard BSD Unix function.
1648
 
    
1649
653
    This should really exist as os.daemon, but it doesn't (yet)."""
1650
654
    if os.fork():
1651
655
        sys.exit()
1659
663
        null = os.open(os.path.devnull, os.O_NOCTTY | os.O_RDWR)
1660
664
        if not stat.S_ISCHR(os.fstat(null).st_mode):
1661
665
            raise OSError(errno.ENODEV,
1662
 
                          "%s not a character device"
1663
 
                          % os.path.devnull)
 
666
                          "/dev/null not a character device")
1664
667
        os.dup2(null, sys.stdin.fileno())
1665
668
        os.dup2(null, sys.stdout.fileno())
1666
669
        os.dup2(null, sys.stderr.fileno())
1669
672
 
1670
673
 
1671
674
def main():
1672
 
    
1673
 
    ##################################################################
1674
 
    # Parsing of options, both command line and config file
1675
 
    
1676
 
    parser = argparse.ArgumentParser()
1677
 
    parser.add_argument("-v", "--version", action="version",
1678
 
                        version = "%%(prog)s %s" % version,
1679
 
                        help="show version number and exit")
1680
 
    parser.add_argument("-i", "--interface", metavar="IF",
1681
 
                        help="Bind to interface IF")
1682
 
    parser.add_argument("-a", "--address",
1683
 
                        help="Address to listen for requests on")
1684
 
    parser.add_argument("-p", "--port", type=int,
1685
 
                        help="Port number to receive requests on")
1686
 
    parser.add_argument("--check", action="store_true",
1687
 
                        help="Run self-test")
1688
 
    parser.add_argument("--debug", action="store_true",
1689
 
                        help="Debug mode; run in foreground and log"
1690
 
                        " to terminal")
1691
 
    parser.add_argument("--debuglevel", metavar="LEVEL",
1692
 
                        help="Debug level for stdout output")
1693
 
    parser.add_argument("--priority", help="GnuTLS"
1694
 
                        " priority string (see GnuTLS documentation)")
1695
 
    parser.add_argument("--servicename",
1696
 
                        metavar="NAME", help="Zeroconf service name")
1697
 
    parser.add_argument("--configdir",
1698
 
                        default="/etc/mandos", metavar="DIR",
1699
 
                        help="Directory to search for configuration"
1700
 
                        " files")
1701
 
    parser.add_argument("--no-dbus", action="store_false",
1702
 
                        dest="use_dbus", help="Do not provide D-Bus"
1703
 
                        " system bus interface")
1704
 
    parser.add_argument("--no-ipv6", action="store_false",
1705
 
                        dest="use_ipv6", help="Do not use IPv6")
1706
 
    options = parser.parse_args()
 
675
    global main_loop_started
 
676
    main_loop_started = False
 
677
    
 
678
    parser = OptionParser(version = "%%prog %s" % version)
 
679
    parser.add_option("-i", "--interface", type="string",
 
680
                      metavar="IF", help="Bind to interface IF")
 
681
    parser.add_option("-a", "--address", type="string",
 
682
                      help="Address to listen for requests on")
 
683
    parser.add_option("-p", "--port", type="int",
 
684
                      help="Port number to receive requests on")
 
685
    parser.add_option("--check", action="store_true", default=False,
 
686
                      help="Run self-test")
 
687
    parser.add_option("--debug", action="store_true",
 
688
                      help="Debug mode; run in foreground and log to"
 
689
                      " terminal")
 
690
    parser.add_option("--priority", type="string", help="GnuTLS"
 
691
                      " priority string (see GnuTLS documentation)")
 
692
    parser.add_option("--servicename", type="string", metavar="NAME",
 
693
                      help="Zeroconf service name")
 
694
    parser.add_option("--configdir", type="string",
 
695
                      default="/etc/mandos", metavar="DIR",
 
696
                      help="Directory to search for configuration"
 
697
                      " files")
 
698
    (options, args) = parser.parse_args()
1707
699
    
1708
700
    if options.check:
1709
701
        import doctest
1718
710
                        "priority":
1719
711
                        "SECURE256:!CTYPE-X.509:+CTYPE-OPENPGP",
1720
712
                        "servicename": "Mandos",
1721
 
                        "use_dbus": "True",
1722
 
                        "use_ipv6": "True",
1723
 
                        "debuglevel": "",
1724
713
                        }
1725
714
    
1726
715
    # Parse config file for server-global settings
1727
 
    server_config = configparser.SafeConfigParser(server_defaults)
 
716
    server_config = ConfigParser.SafeConfigParser(server_defaults)
1728
717
    del server_defaults
1729
 
    server_config.read(os.path.join(options.configdir,
1730
 
                                    "mandos.conf"))
 
718
    server_config.read(os.path.join(options.configdir, "mandos.conf"))
1731
719
    # Convert the SafeConfigParser object to a dict
1732
720
    server_settings = server_config.defaults()
1733
 
    # Use the appropriate methods on the non-string config options
1734
 
    for option in ("debug", "use_dbus", "use_ipv6"):
1735
 
        server_settings[option] = server_config.getboolean("DEFAULT",
1736
 
                                                           option)
1737
 
    if server_settings["port"]:
1738
 
        server_settings["port"] = server_config.getint("DEFAULT",
1739
 
                                                       "port")
 
721
    # Use getboolean on the boolean config option
 
722
    server_settings["debug"] = server_config.getboolean\
 
723
                               ("DEFAULT", "debug")
1740
724
    del server_config
1741
725
    
1742
726
    # Override the settings from the config file with command line
1743
727
    # options, if set.
1744
728
    for option in ("interface", "address", "port", "debug",
1745
 
                   "priority", "servicename", "configdir",
1746
 
                   "use_dbus", "use_ipv6", "debuglevel"):
 
729
                   "priority", "servicename", "configdir"):
1747
730
        value = getattr(options, option)
1748
731
        if value is not None:
1749
732
            server_settings[option] = value
1750
733
    del options
1751
 
    # Force all strings to be unicode
1752
 
    for option in server_settings.keys():
1753
 
        if type(server_settings[option]) is str:
1754
 
            server_settings[option] = unicode(server_settings[option])
1755
734
    # Now we have our good server settings in "server_settings"
1756
735
    
1757
 
    ##################################################################
1758
 
    
1759
 
    # For convenience
1760
736
    debug = server_settings["debug"]
1761
 
    debuglevel = server_settings["debuglevel"]
1762
 
    use_dbus = server_settings["use_dbus"]
1763
 
    use_ipv6 = server_settings["use_ipv6"]
1764
 
 
 
737
    
 
738
    if not debug:
 
739
        syslogger.setLevel(logging.WARNING)
 
740
        console.setLevel(logging.WARNING)
 
741
    
1765
742
    if server_settings["servicename"] != "Mandos":
1766
 
        syslogger.setFormatter(logging.Formatter
1767
 
                               ('Mandos (%s) [%%(process)d]:'
1768
 
                                ' %%(levelname)s: %%(message)s'
 
743
        syslogger.setFormatter(logging.Formatter\
 
744
                               ('Mandos (%s): %%(levelname)s:'
 
745
                                ' %%(message)s'
1769
746
                                % server_settings["servicename"]))
1770
747
    
1771
748
    # Parse config file with clients
1772
749
    client_defaults = { "timeout": "1h",
1773
750
                        "interval": "5m",
1774
 
                        "checker": "fping -q -- %%(host)s",
 
751
                        "checker": "fping -q -- %(host)s",
1775
752
                        "host": "",
1776
 
                        "approval_delay": "0s",
1777
 
                        "approval_duration": "1s",
1778
753
                        }
1779
 
    client_config = configparser.SafeConfigParser(client_defaults)
 
754
    client_config = ConfigParser.SafeConfigParser(client_defaults)
1780
755
    client_config.read(os.path.join(server_settings["configdir"],
1781
756
                                    "clients.conf"))
1782
757
    
1783
 
    global mandos_dbus_service
1784
 
    mandos_dbus_service = None
1785
 
    
1786
 
    tcp_server = MandosServer((server_settings["address"],
1787
 
                               server_settings["port"]),
1788
 
                              ClientHandler,
1789
 
                              interface=(server_settings["interface"]
1790
 
                                         or None),
1791
 
                              use_ipv6=use_ipv6,
1792
 
                              gnutls_priority=
1793
 
                              server_settings["priority"],
1794
 
                              use_dbus=use_dbus)
1795
 
    if not debug:
1796
 
        pidfilename = "/var/run/mandos.pid"
1797
 
        try:
1798
 
            pidfile = open(pidfilename, "w")
1799
 
        except IOError:
1800
 
            logger.error("Could not open file %r", pidfilename)
1801
 
    
1802
 
    try:
1803
 
        uid = pwd.getpwnam("_mandos").pw_uid
1804
 
        gid = pwd.getpwnam("_mandos").pw_gid
1805
 
    except KeyError:
1806
 
        try:
1807
 
            uid = pwd.getpwnam("mandos").pw_uid
1808
 
            gid = pwd.getpwnam("mandos").pw_gid
1809
 
        except KeyError:
1810
 
            try:
1811
 
                uid = pwd.getpwnam("nobody").pw_uid
1812
 
                gid = pwd.getpwnam("nobody").pw_gid
1813
 
            except KeyError:
1814
 
                uid = 65534
1815
 
                gid = 65534
1816
 
    try:
1817
 
        os.setgid(gid)
1818
 
        os.setuid(uid)
1819
 
    except OSError, error:
1820
 
        if error[0] != errno.EPERM:
1821
 
            raise error
1822
 
    
1823
 
    if not debug and not debuglevel:
1824
 
        syslogger.setLevel(logging.WARNING)
1825
 
        console.setLevel(logging.WARNING)
1826
 
    if debuglevel:
1827
 
        level = getattr(logging, debuglevel.upper())
1828
 
        syslogger.setLevel(level)
1829
 
        console.setLevel(level)
1830
 
 
 
758
    global service
 
759
    service = AvahiService(name = server_settings["servicename"],
 
760
                           type = "_mandos._tcp", );
 
761
    if server_settings["interface"]:
 
762
        service.interface = if_nametoindex(server_settings["interface"])
 
763
    
 
764
    global main_loop
 
765
    global bus
 
766
    global server
 
767
    # From the Avahi example code
 
768
    DBusGMainLoop(set_as_default=True )
 
769
    main_loop = gobject.MainLoop()
 
770
    bus = dbus.SystemBus()
 
771
    server = dbus.Interface(
 
772
            bus.get_object( avahi.DBUS_NAME, avahi.DBUS_PATH_SERVER ),
 
773
            avahi.DBUS_INTERFACE_SERVER )
 
774
    # End of Avahi example code
 
775
    
 
776
    clients = Set()
 
777
    def remove_from_clients(client):
 
778
        clients.remove(client)
 
779
        if not clients:
 
780
            logger.critical(u"No clients left, exiting")
 
781
            sys.exit()
 
782
    
 
783
    clients.update(Set(Client(name = section,
 
784
                              stop_hook = remove_from_clients,
 
785
                              config
 
786
                              = dict(client_config.items(section)))
 
787
                       for section in client_config.sections()))
 
788
    if not clients:
 
789
        logger.critical(u"No clients defined")
 
790
        sys.exit(1)
 
791
    
1831
792
    if debug:
1832
 
        # Enable all possible GnuTLS debugging
1833
 
        
1834
 
        # "Use a log level over 10 to enable all debugging options."
1835
 
        # - GnuTLS manual
1836
 
        gnutls.library.functions.gnutls_global_set_log_level(11)
1837
 
        
1838
 
        @gnutls.library.types.gnutls_log_func
1839
 
        def debug_gnutls(level, string):
1840
 
            logger.debug("GnuTLS: %s", string[:-1])
1841
 
        
1842
 
        (gnutls.library.functions
1843
 
         .gnutls_global_set_log_function(debug_gnutls))
1844
 
        
1845
793
        # Redirect stdin so all checkers get /dev/null
1846
794
        null = os.open(os.path.devnull, os.O_NOCTTY | os.O_RDWR)
1847
795
        os.dup2(null, sys.stdin.fileno())
1850
798
    else:
1851
799
        # No console logging
1852
800
        logger.removeHandler(console)
1853
 
    
1854
 
    # Need to fork before connecting to D-Bus
1855
 
    if not debug:
1856
801
        # Close all input and output, do double fork, etc.
1857
802
        daemon()
1858
803
    
1859
 
    global main_loop
1860
 
    # From the Avahi example code
1861
 
    DBusGMainLoop(set_as_default=True )
1862
 
    main_loop = gobject.MainLoop()
1863
 
    bus = dbus.SystemBus()
1864
 
    # End of Avahi example code
1865
 
    if use_dbus:
1866
 
        try:
1867
 
            bus_name = dbus.service.BusName("se.bsnet.fukt.Mandos",
1868
 
                                            bus, do_not_queue=True)
1869
 
        except dbus.exceptions.NameExistsException, e:
1870
 
            logger.error(unicode(e) + ", disabling D-Bus")
1871
 
            use_dbus = False
1872
 
            server_settings["use_dbus"] = False
1873
 
            tcp_server.use_dbus = False
1874
 
    protocol = avahi.PROTO_INET6 if use_ipv6 else avahi.PROTO_INET
1875
 
    service = AvahiService(name = server_settings["servicename"],
1876
 
                           servicetype = "_mandos._tcp",
1877
 
                           protocol = protocol, bus = bus)
1878
 
    if server_settings["interface"]:
1879
 
        service.interface = (if_nametoindex
1880
 
                             (str(server_settings["interface"])))
1881
 
    
1882
 
    global multiprocessing_manager
1883
 
    multiprocessing_manager = multiprocessing.Manager()
1884
 
    
1885
 
    client_class = Client
1886
 
    if use_dbus:
1887
 
        client_class = functools.partial(ClientDBus, bus = bus)
1888
 
    def client_config_items(config, section):
1889
 
        special_settings = {
1890
 
            "approved_by_default":
1891
 
                lambda: config.getboolean(section,
1892
 
                                          "approved_by_default"),
1893
 
            }
1894
 
        for name, value in config.items(section):
1895
 
            try:
1896
 
                yield (name, special_settings[name]())
1897
 
            except KeyError:
1898
 
                yield (name, value)
1899
 
    
1900
 
    tcp_server.clients.update(set(
1901
 
            client_class(name = section,
1902
 
                         config= dict(client_config_items(
1903
 
                        client_config, section)))
1904
 
            for section in client_config.sections()))
1905
 
    if not tcp_server.clients:
1906
 
        logger.warning("No clients defined")
 
804
    pidfilename = "/var/run/mandos/mandos.pid"
 
805
    pid = os.getpid()
 
806
    try:
 
807
        pidfile = open(pidfilename, "w")
 
808
        pidfile.write(str(pid) + "\n")
 
809
        pidfile.close()
 
810
        del pidfile
 
811
    except IOError, err:
 
812
        logger.error(u"Could not write %s file with PID %d",
 
813
                     pidfilename, os.getpid())
 
814
    
 
815
    def cleanup():
 
816
        "Cleanup function; run on exit"
 
817
        global group
 
818
        # From the Avahi example code
 
819
        if not group is None:
 
820
            group.Free()
 
821
            group = None
 
822
        # End of Avahi example code
1907
823
        
 
824
        while clients:
 
825
            client = clients.pop()
 
826
            client.stop_hook = None
 
827
            client.stop()
 
828
    
 
829
    atexit.register(cleanup)
 
830
    
1908
831
    if not debug:
1909
 
        try:
1910
 
            with pidfile:
1911
 
                pid = os.getpid()
1912
 
                pidfile.write(str(pid) + "\n".encode("utf-8"))
1913
 
            del pidfile
1914
 
        except IOError:
1915
 
            logger.error("Could not write to file %r with PID %d",
1916
 
                         pidfilename, pid)
1917
 
        except NameError:
1918
 
            # "pidfile" was never created
1919
 
            pass
1920
 
        del pidfilename
1921
 
        
1922
832
        signal.signal(signal.SIGINT, signal.SIG_IGN)
1923
 
 
1924
833
    signal.signal(signal.SIGHUP, lambda signum, frame: sys.exit())
1925
834
    signal.signal(signal.SIGTERM, lambda signum, frame: sys.exit())
1926
835
    
1927
 
    if use_dbus:
1928
 
        class MandosDBusService(dbus.service.Object):
1929
 
            """A D-Bus proxy object"""
1930
 
            def __init__(self):
1931
 
                dbus.service.Object.__init__(self, bus, "/")
1932
 
            _interface = "se.bsnet.fukt.Mandos"
1933
 
            
1934
 
            @dbus.service.signal(_interface, signature="o")
1935
 
            def ClientAdded(self, objpath):
1936
 
                "D-Bus signal"
1937
 
                pass
1938
 
            
1939
 
            @dbus.service.signal(_interface, signature="ss")
1940
 
            def ClientNotFound(self, fingerprint, address):
1941
 
                "D-Bus signal"
1942
 
                pass
1943
 
            
1944
 
            @dbus.service.signal(_interface, signature="os")
1945
 
            def ClientRemoved(self, objpath, name):
1946
 
                "D-Bus signal"
1947
 
                pass
1948
 
            
1949
 
            @dbus.service.method(_interface, out_signature="ao")
1950
 
            def GetAllClients(self):
1951
 
                "D-Bus method"
1952
 
                return dbus.Array(c.dbus_object_path
1953
 
                                  for c in tcp_server.clients)
1954
 
            
1955
 
            @dbus.service.method(_interface,
1956
 
                                 out_signature="a{oa{sv}}")
1957
 
            def GetAllClientsWithProperties(self):
1958
 
                "D-Bus method"
1959
 
                return dbus.Dictionary(
1960
 
                    ((c.dbus_object_path, c.GetAll(""))
1961
 
                     for c in tcp_server.clients),
1962
 
                    signature="oa{sv}")
1963
 
            
1964
 
            @dbus.service.method(_interface, in_signature="o")
1965
 
            def RemoveClient(self, object_path):
1966
 
                "D-Bus method"
1967
 
                for c in tcp_server.clients:
1968
 
                    if c.dbus_object_path == object_path:
1969
 
                        tcp_server.clients.remove(c)
1970
 
                        c.remove_from_connection()
1971
 
                        # Don't signal anything except ClientRemoved
1972
 
                        c.disable(quiet=True)
1973
 
                        # Emit D-Bus signal
1974
 
                        self.ClientRemoved(object_path, c.name)
1975
 
                        return
1976
 
                raise KeyError(object_path)
1977
 
            
1978
 
            del _interface
1979
 
        
1980
 
        mandos_dbus_service = MandosDBusService()
1981
 
    
1982
 
    def cleanup():
1983
 
        "Cleanup function; run on exit"
1984
 
        service.cleanup()
1985
 
        
1986
 
        while tcp_server.clients:
1987
 
            client = tcp_server.clients.pop()
1988
 
            if use_dbus:
1989
 
                client.remove_from_connection()
1990
 
            client.disable_hook = None
1991
 
            # Don't signal anything except ClientRemoved
1992
 
            client.disable(quiet=True)
1993
 
            if use_dbus:
1994
 
                # Emit D-Bus signal
1995
 
                mandos_dbus_service.ClientRemoved(client.dbus_object_path,
1996
 
                                                  client.name)
1997
 
    
1998
 
    atexit.register(cleanup)
1999
 
    
2000
 
    for client in tcp_server.clients:
2001
 
        if use_dbus:
2002
 
            # Emit D-Bus signal
2003
 
            mandos_dbus_service.ClientAdded(client.dbus_object_path)
2004
 
        client.enable()
2005
 
    
2006
 
    tcp_server.enable()
2007
 
    tcp_server.server_activate()
2008
 
    
 
836
    for client in clients:
 
837
        client.start()
 
838
    
 
839
    tcp_server = IPv6_TCPServer((server_settings["address"],
 
840
                                 server_settings["port"]),
 
841
                                tcp_handler,
 
842
                                settings=server_settings,
 
843
                                clients=clients)
2009
844
    # Find out what port we got
2010
845
    service.port = tcp_server.socket.getsockname()[1]
2011
 
    if use_ipv6:
2012
 
        logger.info("Now listening on address %r, port %d,"
2013
 
                    " flowinfo %d, scope_id %d"
2014
 
                    % tcp_server.socket.getsockname())
2015
 
    else:                       # IPv4
2016
 
        logger.info("Now listening on address %r, port %d"
2017
 
                    % tcp_server.socket.getsockname())
 
846
    logger.info(u"Now listening on address %r, port %d, flowinfo %d,"
 
847
                u" scope_id %d" % tcp_server.socket.getsockname())
2018
848
    
2019
849
    #service.interface = tcp_server.socket.getsockname()[3]
2020
850
    
2021
851
    try:
2022
852
        # From the Avahi example code
 
853
        server.connect_to_signal("StateChanged", server_state_changed)
2023
854
        try:
2024
 
            service.activate()
 
855
            server_state_changed(server.GetState())
2025
856
        except dbus.exceptions.DBusException, error:
2026
 
            logger.critical("DBusException: %s", error)
2027
 
            cleanup()
 
857
            logger.critical(u"DBusException: %s", error)
2028
858
            sys.exit(1)
2029
859
        # End of Avahi example code
2030
860
        
2031
861
        gobject.io_add_watch(tcp_server.fileno(), gobject.IO_IN,
2032
862
                             lambda *args, **kwargs:
2033
 
                             (tcp_server.handle_request
2034
 
                              (*args[2:], **kwargs) or True))
 
863
                             tcp_server.handle_request\
 
864
                             (*args[2:], **kwargs) or True)
2035
865
        
2036
 
        logger.debug("Starting main loop")
 
866
        logger.debug(u"Starting main loop")
 
867
        main_loop_started = True
2037
868
        main_loop.run()
2038
869
    except AvahiError, error:
2039
 
        logger.critical("AvahiError: %s", error)
2040
 
        cleanup()
 
870
        logger.critical(u"AvahiError: %s" + unicode(error))
2041
871
        sys.exit(1)
2042
872
    except KeyboardInterrupt:
2043
873
        if debug:
2044
 
            print("", file=sys.stderr)
2045
 
        logger.debug("Server received KeyboardInterrupt")
2046
 
    logger.debug("Server exiting")
2047
 
    # Must run before the D-Bus bus name gets deregistered
2048
 
    cleanup()
 
874
            print
2049
875
 
2050
876
if __name__ == '__main__':
2051
877
    main()