/mandos/trunk

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  • Committer: Teddy Hogeborn
  • Date: 2009-01-18 00:16:57 UTC
  • Revision ID: teddy@fukt.bsnet.se-20090118001657-6mo3ae73ldy5tegf
* debian/mandos-client.postinst: Converted to Bourne shell.  Also
                                 minor message change.
* debian/mandos-client.postrm: Minor message change.
* debian/mandos.postinst: Converted to Bourne shell.  Also minor
                          message change.
* debian/mandos.prerm: Minor message change.

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Lines of Context:
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# This program is partly derived from an example program for an Avahi
7
7
# service publisher, downloaded from
8
8
# <http://avahi.org/wiki/PythonPublishExample>.  This includes the
9
 
# methods "add", "remove", "server_state_changed",
10
 
# "entry_group_state_changed", "cleanup", and "activate" in the
11
 
# "AvahiService" class, and some lines in "main".
 
9
# methods "add" and "remove" in the "AvahiService" class, the
 
10
# "server_state_changed" and "entry_group_state_changed" functions,
 
11
# and some lines in "main".
12
12
13
13
# Everything else is
14
 
# Copyright © 2008-2011 Teddy Hogeborn
15
 
# Copyright © 2008-2011 Björn Påhlsson
 
14
# Copyright © 2008,2009 Teddy Hogeborn
 
15
# Copyright © 2008,2009 Björn Påhlsson
16
16
17
17
# This program is free software: you can redistribute it and/or modify
18
18
# it under the terms of the GNU General Public License as published by
31
31
# Contact the authors at <mandos@fukt.bsnet.se>.
32
32
33
33
 
34
 
from __future__ import (division, absolute_import, print_function,
35
 
                        unicode_literals)
 
34
from __future__ import division, with_statement, absolute_import
36
35
 
37
 
import SocketServer as socketserver
 
36
import SocketServer
38
37
import socket
39
38
import optparse
40
39
import datetime
45
44
import gnutls.library.functions
46
45
import gnutls.library.constants
47
46
import gnutls.library.types
48
 
import ConfigParser as configparser
 
47
import ConfigParser
49
48
import sys
50
49
import re
51
50
import os
52
51
import signal
 
52
from sets import Set
53
53
import subprocess
54
54
import atexit
55
55
import stat
56
56
import logging
57
57
import logging.handlers
58
58
import pwd
59
 
import contextlib
60
 
import struct
61
 
import fcntl
62
 
import functools
63
 
import cPickle as pickle
64
 
import multiprocessing
 
59
from contextlib import closing
65
60
 
66
61
import dbus
67
62
import dbus.service
70
65
from dbus.mainloop.glib import DBusGMainLoop
71
66
import ctypes
72
67
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 = "1.2.3"
86
 
 
87
 
#logger = logging.getLogger('mandos')
 
68
 
 
69
version = "1.0.5"
 
70
 
88
71
logger = logging.Logger('mandos')
89
72
syslogger = (logging.handlers.SysLogHandler
90
73
             (facility = logging.handlers.SysLogHandler.LOG_DAEMON,
91
 
              address = str("/dev/log")))
 
74
              address = "/dev/log"))
92
75
syslogger.setFormatter(logging.Formatter
93
 
                       ('Mandos [%(process)d]: %(levelname)s:'
94
 
                        ' %(message)s'))
 
76
                       ('Mandos: %(levelname)s: %(message)s'))
95
77
logger.addHandler(syslogger)
96
78
 
97
79
console = logging.StreamHandler()
98
 
console.setFormatter(logging.Formatter('%(name)s [%(process)d]:'
99
 
                                       ' %(levelname)s:'
 
80
console.setFormatter(logging.Formatter('%(name)s: %(levelname)s:'
100
81
                                       ' %(message)s'))
101
82
logger.addHandler(console)
102
83
 
116
97
 
117
98
class AvahiService(object):
118
99
    """An Avahi (Zeroconf) service.
119
 
    
120
100
    Attributes:
121
101
    interface: integer; avahi.IF_UNSPEC or an interface index.
122
102
               Used to optionally bind to the specified interface.
130
110
    max_renames: integer; maximum number of renames
131
111
    rename_count: integer; counter so we only rename after collisions
132
112
                  a sensible number of times
133
 
    group: D-Bus Entry Group
134
 
    server: D-Bus Server
135
 
    bus: dbus.SystemBus()
136
113
    """
137
114
    def __init__(self, interface = avahi.IF_UNSPEC, name = None,
138
115
                 servicetype = None, port = None, TXT = None,
139
 
                 domain = "", host = "", max_renames = 32768,
140
 
                 protocol = avahi.PROTO_UNSPEC, bus = None):
 
116
                 domain = "", host = "", max_renames = 32768):
141
117
        self.interface = interface
142
118
        self.name = name
143
119
        self.type = servicetype
147
123
        self.host = host
148
124
        self.rename_count = 0
149
125
        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
126
    def rename(self):
155
127
        """Derived from the Avahi example code"""
156
128
        if self.rename_count >= self.max_renames:
157
 
            logger.critical("No suitable Zeroconf service name found"
158
 
                            " after %i retries, exiting.",
 
129
            logger.critical(u"No suitable Zeroconf service name found"
 
130
                            u" after %i retries, exiting.",
159
131
                            self.rename_count)
160
 
            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)
 
132
            raise AvahiServiceError(u"Too many renames")
 
133
        self.name = server.GetAlternativeServiceName(self.name)
 
134
        logger.info(u"Changing Zeroconf service name to %r ...",
 
135
                    str(self.name))
164
136
        syslogger.setFormatter(logging.Formatter
165
 
                               ('Mandos (%s) [%%(process)d]:'
166
 
                                ' %%(levelname)s: %%(message)s'
167
 
                                % self.name))
 
137
                               ('Mandos (%s): %%(levelname)s:'
 
138
                                ' %%(message)s' % self.name))
168
139
        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)
 
140
        self.add()
175
141
        self.rename_count += 1
176
142
    def remove(self):
177
143
        """Derived from the Avahi example code"""
178
 
        if self.group is not None:
179
 
            self.group.Reset()
 
144
        if group is not None:
 
145
            group.Reset()
180
146
    def add(self):
181
147
        """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())
238
 
 
239
 
 
240
 
class Client(object):
 
148
        global group
 
149
        if group is None:
 
150
            group = dbus.Interface(bus.get_object
 
151
                                   (avahi.DBUS_NAME,
 
152
                                    server.EntryGroupNew()),
 
153
                                   avahi.DBUS_INTERFACE_ENTRY_GROUP)
 
154
            group.connect_to_signal('StateChanged',
 
155
                                    entry_group_state_changed)
 
156
        logger.debug(u"Adding Zeroconf service '%s' of type '%s' ...",
 
157
                     service.name, service.type)
 
158
        group.AddService(
 
159
                self.interface,         # interface
 
160
                avahi.PROTO_INET6,      # protocol
 
161
                dbus.UInt32(0),         # flags
 
162
                self.name, self.type,
 
163
                self.domain, self.host,
 
164
                dbus.UInt16(self.port),
 
165
                avahi.string_array_to_txt_array(self.TXT))
 
166
        group.Commit()
 
167
 
 
168
# From the Avahi example code:
 
169
group = None                            # our entry group
 
170
# End of Avahi example code
 
171
 
 
172
 
 
173
def _datetime_to_dbus(dt, variant_level=0):
 
174
    """Convert a UTC datetime.datetime() to a D-Bus type."""
 
175
    return dbus.String(dt.isoformat(), variant_level=variant_level)
 
176
 
 
177
 
 
178
class Client(dbus.service.Object):
241
179
    """A representation of a client host served by this server.
242
 
    
243
180
    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
 
181
    name:       string; from the config file, used in log messages
 
182
    fingerprint: string (40 or 32 hexadecimal digits); used to
 
183
                 uniquely identify the client
 
184
    secret:     bytestring; sent verbatim (over TLS) to client
 
185
    host:       string; available for use by the checker command
 
186
    created:    datetime.datetime(); (UTC) object creation
 
187
    last_enabled: datetime.datetime(); (UTC)
 
188
    enabled:    bool()
 
189
    last_checked_ok: datetime.datetime(); (UTC) or None
 
190
    timeout:    datetime.timedelta(); How long from last_checked_ok
 
191
                                      until this client is invalid
 
192
    interval:   datetime.timedelta(); How often to start a new checker
 
193
    disable_hook:  If set, called by disable() as disable_hook(self)
247
194
    checker:    subprocess.Popen(); a running checker process used
248
195
                                    to see if the client lives.
249
196
                                    '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
 
197
    checker_initiator_tag: a gobject event source tag, or None
 
198
    disable_initiator_tag:    - '' -
 
199
    checker_callback_tag:  - '' -
 
200
    checker_command: string; External command which is run to check if
 
201
                     client lives.  %() expansions are done at
253
202
                     runtime with vars(self) as dict, so that for
254
203
                     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.
 
204
    use_dbus: bool(); Whether to provide D-Bus interface and signals
 
205
    dbus_object_path: dbus.ObjectPath ; only set if self.use_dbus
274
206
    """
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
207
    def timeout_milliseconds(self):
289
208
        "Return the 'timeout' attribute in milliseconds"
290
 
        return self._timedelta_to_milliseconds(self.timeout)
 
209
        return ((self.timeout.days * 24 * 60 * 60 * 1000)
 
210
                + (self.timeout.seconds * 1000)
 
211
                + (self.timeout.microseconds // 1000))
291
212
    
292
213
    def interval_milliseconds(self):
293
214
        "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)
 
215
        return ((self.interval.days * 24 * 60 * 60 * 1000)
 
216
                + (self.interval.seconds * 1000)
 
217
                + (self.interval.microseconds // 1000))
298
218
    
299
 
    def __init__(self, name = None, disable_hook=None, config=None):
 
219
    def __init__(self, name = None, disable_hook=None, config=None,
 
220
                 use_dbus=True):
300
221
        """Note: the 'checker' key in 'config' sets the
301
222
        'checker_command' attribute and *not* the 'checker'
302
223
        attribute."""
303
224
        self.name = name
304
225
        if config is None:
305
226
            config = {}
306
 
        logger.debug("Creating client %r", self.name)
 
227
        logger.debug(u"Creating client %r", self.name)
 
228
        self.use_dbus = use_dbus
 
229
        if self.use_dbus:
 
230
            self.dbus_object_path = (dbus.ObjectPath
 
231
                                     ("/Mandos/clients/"
 
232
                                      + self.name.replace(".", "_")))
 
233
            dbus.service.Object.__init__(self, bus,
 
234
                                         self.dbus_object_path)
307
235
        # Uppercase and remove spaces from fingerprint for later
308
236
        # comparison purposes with return value from the fingerprint()
309
237
        # function
310
238
        self.fingerprint = (config["fingerprint"].upper()
311
 
                            .replace(" ", ""))
312
 
        logger.debug("  Fingerprint: %s", self.fingerprint)
 
239
                            .replace(u" ", u""))
 
240
        logger.debug(u"  Fingerprint: %s", self.fingerprint)
313
241
        if "secret" in config:
314
 
            self.secret = config["secret"].decode("base64")
 
242
            self.secret = config["secret"].decode(u"base64")
315
243
        elif "secfile" in config:
316
 
            with open(os.path.expanduser(os.path.expandvars
317
 
                                         (config["secfile"])),
318
 
                      "rb") as secfile:
 
244
            with closing(open(os.path.expanduser
 
245
                              (os.path.expandvars
 
246
                               (config["secfile"])))) as secfile:
319
247
                self.secret = secfile.read()
320
248
        else:
321
 
            raise TypeError("No secret or secfile for client %s"
 
249
            raise TypeError(u"No secret or secfile for client %s"
322
250
                            % self.name)
323
251
        self.host = config.get("host", "")
324
252
        self.created = datetime.datetime.utcnow()
325
253
        self.enabled = False
326
 
        self.last_approval_request = None
327
254
        self.last_enabled = None
328
255
        self.last_checked_ok = None
329
256
        self.timeout = string_to_delta(config["timeout"])
334
261
        self.disable_initiator_tag = None
335
262
        self.checker_callback_tag = None
336
263
        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
264
    
349
 
    def send_changedstate(self):
350
 
        self.changedstate.acquire()
351
 
        self.changedstate.notify_all()
352
 
        self.changedstate.release()
353
 
        
354
265
    def enable(self):
355
266
        """Start this client's checker and timeout hooks"""
356
 
        if getattr(self, "enabled", False):
357
 
            # Already enabled
358
 
            return
359
 
        self.send_changedstate()
360
267
        self.last_enabled = datetime.datetime.utcnow()
361
268
        # Schedule a new checker to be started an 'interval' from now,
362
269
        # and every interval from then on.
363
270
        self.checker_initiator_tag = (gobject.timeout_add
364
271
                                      (self.interval_milliseconds(),
365
272
                                       self.start_checker))
 
273
        # Also start a new checker *right now*.
 
274
        self.start_checker()
366
275
        # Schedule a disable() when 'timeout' has passed
367
276
        self.disable_initiator_tag = (gobject.timeout_add
368
277
                                   (self.timeout_milliseconds(),
369
278
                                    self.disable))
370
279
        self.enabled = True
371
 
        # Also start a new checker *right now*.
372
 
        self.start_checker()
 
280
        if self.use_dbus:
 
281
            # Emit D-Bus signals
 
282
            self.PropertyChanged(dbus.String(u"enabled"),
 
283
                                 dbus.Boolean(True, variant_level=1))
 
284
            self.PropertyChanged(dbus.String(u"last_enabled"),
 
285
                                 (_datetime_to_dbus(self.last_enabled,
 
286
                                                    variant_level=1)))
373
287
    
374
 
    def disable(self, quiet=True):
 
288
    def disable(self):
375
289
        """Disable this client."""
376
290
        if not getattr(self, "enabled", False):
377
291
            return False
378
 
        if not quiet:
379
 
            self.send_changedstate()
380
 
        if not quiet:
381
 
            logger.info("Disabling client %s", self.name)
 
292
        logger.info(u"Disabling client %s", self.name)
382
293
        if getattr(self, "disable_initiator_tag", False):
383
294
            gobject.source_remove(self.disable_initiator_tag)
384
295
            self.disable_initiator_tag = None
389
300
        if self.disable_hook:
390
301
            self.disable_hook(self)
391
302
        self.enabled = False
 
303
        if self.use_dbus:
 
304
            # Emit D-Bus signal
 
305
            self.PropertyChanged(dbus.String(u"enabled"),
 
306
                                 dbus.Boolean(False, variant_level=1))
392
307
        # Do not run this again if called by a gobject.timeout_add
393
308
        return False
394
309
    
400
315
        """The checker has completed, so take appropriate actions."""
401
316
        self.checker_callback_tag = None
402
317
        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?",
 
318
        if self.use_dbus:
 
319
            # Emit D-Bus signal
 
320
            self.PropertyChanged(dbus.String(u"checker_running"),
 
321
                                 dbus.Boolean(False, variant_level=1))
 
322
        if (os.WIFEXITED(condition)
 
323
            and (os.WEXITSTATUS(condition) == 0)):
 
324
            logger.info(u"Checker for %(name)s succeeded",
 
325
                        vars(self))
 
326
            if self.use_dbus:
 
327
                # Emit D-Bus signal
 
328
                self.CheckerCompleted(dbus.Boolean(True),
 
329
                                      dbus.UInt16(condition),
 
330
                                      dbus.String(command))
 
331
            self.bump_timeout()
 
332
        elif not os.WIFEXITED(condition):
 
333
            logger.warning(u"Checker for %(name)s crashed?",
414
334
                           vars(self))
 
335
            if self.use_dbus:
 
336
                # Emit D-Bus signal
 
337
                self.CheckerCompleted(dbus.Boolean(False),
 
338
                                      dbus.UInt16(condition),
 
339
                                      dbus.String(command))
 
340
        else:
 
341
            logger.info(u"Checker for %(name)s failed",
 
342
                        vars(self))
 
343
            if self.use_dbus:
 
344
                # Emit D-Bus signal
 
345
                self.CheckerCompleted(dbus.Boolean(False),
 
346
                                      dbus.UInt16(condition),
 
347
                                      dbus.String(command))
415
348
    
416
 
    def checked_ok(self):
 
349
    def bump_timeout(self):
417
350
        """Bump up the timeout for this client.
418
 
        
419
351
        This should only be called when the client has been seen,
420
352
        alive and well.
421
353
        """
424
356
        self.disable_initiator_tag = (gobject.timeout_add
425
357
                                      (self.timeout_milliseconds(),
426
358
                                       self.disable))
427
 
    
428
 
    def need_approval(self):
429
 
        self.last_approval_request = datetime.datetime.utcnow()
 
359
        if self.use_dbus:
 
360
            # Emit D-Bus signal
 
361
            self.PropertyChanged(
 
362
                dbus.String(u"last_checked_ok"),
 
363
                (_datetime_to_dbus(self.last_checked_ok,
 
364
                                   variant_level=1)))
430
365
    
431
366
    def start_checker(self):
432
367
        """Start a new checker subprocess if one is not running.
433
 
        
434
368
        If a checker already exists, leave it running and do
435
369
        nothing."""
436
370
        # The reason for not killing a running checker is that if we
439
373
        # client would inevitably timeout, since no checker would get
440
374
        # a chance to run to completion.  If we instead leave running
441
375
        # 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
 
376
        # than 'timeout' for the client to be declared invalid, which
 
377
        # is as it should be.
459
378
        if self.checker is None:
460
379
            try:
461
380
                # In case checker_command has exactly one % operator
462
381
                command = self.checker_command % self.host
463
382
            except TypeError:
464
383
                # 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
 
 
 
384
                escaped_attrs = dict((key, re.escape(str(val)))
 
385
                                     for key, val in
 
386
                                     vars(self).iteritems())
473
387
                try:
474
388
                    command = self.checker_command % escaped_attrs
475
389
                except TypeError, error:
476
 
                    logger.error('Could not format string "%s":'
477
 
                                 ' %s', self.checker_command, error)
 
390
                    logger.error(u'Could not format string "%s":'
 
391
                                 u' %s', self.checker_command, error)
478
392
                    return True # Try again later
479
 
            self.current_checker_command = command
480
393
            try:
481
 
                logger.info("Starting checker %r for %s",
 
394
                logger.info(u"Starting checker %r for %s",
482
395
                            command, self.name)
483
396
                # We don't need to redirect stdout and stderr, since
484
397
                # in normal mode, that is already done by daemon(),
487
400
                self.checker = subprocess.Popen(command,
488
401
                                                close_fds=True,
489
402
                                                shell=True, cwd="/")
 
403
                if self.use_dbus:
 
404
                    # Emit D-Bus signal
 
405
                    self.CheckerStarted(command)
 
406
                    self.PropertyChanged(
 
407
                        dbus.String("checker_running"),
 
408
                        dbus.Boolean(True, variant_level=1))
490
409
                self.checker_callback_tag = (gobject.child_watch_add
491
410
                                             (self.checker.pid,
492
411
                                              self.checker_callback,
493
412
                                              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)
500
413
            except OSError, error:
501
 
                logger.error("Failed to start subprocess: %s",
 
414
                logger.error(u"Failed to start subprocess: %s",
502
415
                             error)
503
416
        # Re-run this periodically if run by gobject.timeout_add
504
417
        return True
510
423
            self.checker_callback_tag = None
511
424
        if getattr(self, "checker", None) is None:
512
425
            return
513
 
        logger.debug("Stopping checker for %(name)s", vars(self))
 
426
        logger.debug(u"Stopping checker for %(name)s", vars(self))
514
427
        try:
515
428
            os.kill(self.checker.pid, signal.SIGTERM)
516
 
            #time.sleep(0.5)
 
429
            #os.sleep(0.5)
517
430
            #if self.checker.poll() is None:
518
431
            #    os.kill(self.checker.pid, signal.SIGKILL)
519
432
        except OSError, error:
520
433
            if error.errno != errno.ESRCH: # No such process
521
434
                raise
522
435
        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
 
436
        if self.use_dbus:
 
437
            self.PropertyChanged(dbus.String(u"checker_running"),
 
438
                                 dbus.Boolean(False, variant_level=1))
 
439
    
 
440
    def still_valid(self):
 
441
        """Has the timeout not yet passed for this client?"""
 
442
        if not getattr(self, "enabled", False):
 
443
            return False
 
444
        now = datetime.datetime.utcnow()
 
445
        if self.last_checked_ok is None:
 
446
            return now < (self.created + self.timeout)
 
447
        else:
 
448
            return now < (self.last_checked_ok + self.timeout)
 
449
    
 
450
    ## D-Bus methods & signals
 
451
    _interface = u"org.mandos_system.Mandos.Client"
 
452
    
 
453
    # BumpTimeout - method
 
454
    BumpTimeout = dbus.service.method(_interface)(bump_timeout)
 
455
    BumpTimeout.__name__ = "BumpTimeout"
875
456
    
876
457
    # CheckerCompleted - signal
877
 
    @dbus.service.signal(_interface, signature="nxs")
878
 
    def CheckerCompleted(self, exitcode, waitstatus, command):
 
458
    @dbus.service.signal(_interface, signature="bqs")
 
459
    def CheckerCompleted(self, success, condition, command):
879
460
        "D-Bus signal"
880
461
        pass
881
462
    
885
466
        "D-Bus signal"
886
467
        pass
887
468
    
 
469
    # GetAllProperties - method
 
470
    @dbus.service.method(_interface, out_signature="a{sv}")
 
471
    def GetAllProperties(self):
 
472
        "D-Bus method"
 
473
        return dbus.Dictionary({
 
474
                dbus.String("name"):
 
475
                    dbus.String(self.name, variant_level=1),
 
476
                dbus.String("fingerprint"):
 
477
                    dbus.String(self.fingerprint, variant_level=1),
 
478
                dbus.String("host"):
 
479
                    dbus.String(self.host, variant_level=1),
 
480
                dbus.String("created"):
 
481
                    _datetime_to_dbus(self.created, variant_level=1),
 
482
                dbus.String("last_enabled"):
 
483
                    (_datetime_to_dbus(self.last_enabled,
 
484
                                       variant_level=1)
 
485
                     if self.last_enabled is not None
 
486
                     else dbus.Boolean(False, variant_level=1)),
 
487
                dbus.String("enabled"):
 
488
                    dbus.Boolean(self.enabled, variant_level=1),
 
489
                dbus.String("last_checked_ok"):
 
490
                    (_datetime_to_dbus(self.last_checked_ok,
 
491
                                       variant_level=1)
 
492
                     if self.last_checked_ok is not None
 
493
                     else dbus.Boolean (False, variant_level=1)),
 
494
                dbus.String("timeout"):
 
495
                    dbus.UInt64(self.timeout_milliseconds(),
 
496
                                variant_level=1),
 
497
                dbus.String("interval"):
 
498
                    dbus.UInt64(self.interval_milliseconds(),
 
499
                                variant_level=1),
 
500
                dbus.String("checker"):
 
501
                    dbus.String(self.checker_command,
 
502
                                variant_level=1),
 
503
                dbus.String("checker_running"):
 
504
                    dbus.Boolean(self.checker is not None,
 
505
                                 variant_level=1),
 
506
                }, signature="sv")
 
507
    
 
508
    # IsStillValid - method
 
509
    IsStillValid = (dbus.service.method(_interface, out_signature="b")
 
510
                    (still_valid))
 
511
    IsStillValid.__name__ = "IsStillValid"
 
512
    
888
513
    # PropertyChanged - signal
889
514
    @dbus.service.signal(_interface, signature="sv")
890
515
    def PropertyChanged(self, property, value):
891
516
        "D-Bus signal"
892
517
        pass
893
518
    
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()
 
519
    # SetChecker - method
 
520
    @dbus.service.method(_interface, in_signature="s")
 
521
    def SetChecker(self, checker):
 
522
        "D-Bus setter method"
 
523
        self.checker_command = checker
 
524
        # Emit D-Bus signal
 
525
        self.PropertyChanged(dbus.String(u"checker"),
 
526
                             dbus.String(self.checker_command,
 
527
                                         variant_level=1))
 
528
    
 
529
    # SetHost - method
 
530
    @dbus.service.method(_interface, in_signature="s")
 
531
    def SetHost(self, host):
 
532
        "D-Bus setter method"
 
533
        self.host = host
 
534
        # Emit D-Bus signal
 
535
        self.PropertyChanged(dbus.String(u"host"),
 
536
                             dbus.String(self.host, variant_level=1))
 
537
    
 
538
    # SetInterval - method
 
539
    @dbus.service.method(_interface, in_signature="t")
 
540
    def SetInterval(self, milliseconds):
 
541
        self.interval = datetime.timedelta(0, 0, 0, milliseconds)
 
542
        # Emit D-Bus signal
 
543
        self.PropertyChanged(dbus.String(u"interval"),
 
544
                             (dbus.UInt64(self.interval_milliseconds(),
 
545
                                          variant_level=1)))
 
546
    
 
547
    # SetSecret - method
 
548
    @dbus.service.method(_interface, in_signature="ay",
 
549
                         byte_arrays=True)
 
550
    def SetSecret(self, secret):
 
551
        "D-Bus setter method"
 
552
        self.secret = str(secret)
 
553
    
 
554
    # SetTimeout - method
 
555
    @dbus.service.method(_interface, in_signature="t")
 
556
    def SetTimeout(self, milliseconds):
 
557
        self.timeout = datetime.timedelta(0, 0, 0, milliseconds)
 
558
        # Emit D-Bus signal
 
559
        self.PropertyChanged(dbus.String(u"timeout"),
 
560
                             (dbus.UInt64(self.timeout_milliseconds(),
 
561
                                          variant_level=1)))
926
562
    
927
563
    # Enable - method
928
 
    @dbus.service.method(_interface)
929
 
    def Enable(self):
930
 
        "D-Bus method"
931
 
        self.enable()
 
564
    Enable = dbus.service.method(_interface)(enable)
 
565
    Enable.__name__ = "Enable"
932
566
    
933
567
    # StartChecker - method
934
568
    @dbus.service.method(_interface)
943
577
        self.disable()
944
578
    
945
579
    # 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
1042
 
        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)
 
580
    StopChecker = dbus.service.method(_interface)(stop_checker)
 
581
    StopChecker.__name__ = "StopChecker"
1135
582
    
1136
583
    del _interface
1137
584
 
1138
585
 
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.
 
586
def peer_certificate(session):
 
587
    "Return the peer's OpenPGP certificate as a bytestring"
 
588
    # If not an OpenPGP certificate...
 
589
    if (gnutls.library.functions
 
590
        .gnutls_certificate_type_get(session._c_object)
 
591
        != gnutls.library.constants.GNUTLS_CRT_OPENPGP):
 
592
        # ...do the normal thing
 
593
        return session.peer_certificate
 
594
    list_size = ctypes.c_uint()
 
595
    cert_list = (gnutls.library.functions
 
596
                 .gnutls_certificate_get_peers
 
597
                 (session._c_object, ctypes.byref(list_size)))
 
598
    if list_size.value == 0:
 
599
        return None
 
600
    cert = cert_list[0]
 
601
    return ctypes.string_at(cert.data, cert.size)
 
602
 
 
603
 
 
604
def fingerprint(openpgp):
 
605
    "Convert an OpenPGP bytestring to a hexdigit fingerprint string"
 
606
    # New GnuTLS "datum" with the OpenPGP public key
 
607
    datum = (gnutls.library.types
 
608
             .gnutls_datum_t(ctypes.cast(ctypes.c_char_p(openpgp),
 
609
                                         ctypes.POINTER
 
610
                                         (ctypes.c_ubyte)),
 
611
                             ctypes.c_uint(len(openpgp))))
 
612
    # New empty GnuTLS certificate
 
613
    crt = gnutls.library.types.gnutls_openpgp_crt_t()
 
614
    (gnutls.library.functions
 
615
     .gnutls_openpgp_crt_init(ctypes.byref(crt)))
 
616
    # Import the OpenPGP public key into the certificate
 
617
    (gnutls.library.functions
 
618
     .gnutls_openpgp_crt_import(crt, ctypes.byref(datum),
 
619
                                gnutls.library.constants
 
620
                                .GNUTLS_OPENPGP_FMT_RAW))
 
621
    # Verify the self signature in the key
 
622
    crtverify = ctypes.c_uint()
 
623
    (gnutls.library.functions
 
624
     .gnutls_openpgp_crt_verify_self(crt, 0, ctypes.byref(crtverify)))
 
625
    if crtverify.value != 0:
 
626
        gnutls.library.functions.gnutls_openpgp_crt_deinit(crt)
 
627
        raise gnutls.errors.CertificateSecurityError("Verify failed")
 
628
    # New buffer for the fingerprint
 
629
    buf = ctypes.create_string_buffer(20)
 
630
    buf_len = ctypes.c_size_t()
 
631
    # Get the fingerprint from the certificate into the buffer
 
632
    (gnutls.library.functions
 
633
     .gnutls_openpgp_crt_get_fingerprint(crt, ctypes.byref(buf),
 
634
                                         ctypes.byref(buf_len)))
 
635
    # Deinit the certificate
 
636
    gnutls.library.functions.gnutls_openpgp_crt_deinit(crt)
 
637
    # Convert the buffer to a Python bytestring
 
638
    fpr = ctypes.string_at(buf, buf_len.value)
 
639
    # Convert the bytestring to hexadecimal notation
 
640
    hex_fpr = u''.join(u"%02X" % ord(char) for char in fpr)
 
641
    return hex_fpr
 
642
 
 
643
 
 
644
class TCP_handler(SocketServer.BaseRequestHandler, object):
 
645
    """A TCP request handler class.
 
646
    Instantiated by IPv6_TCPServer for each request to handle it.
1169
647
    Note: This will run in its own forked process."""
1170
648
    
1171
649
    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
 
    
 
650
        logger.info(u"TCP connection from: %s",
 
651
                    unicode(self.client_address))
 
652
        session = (gnutls.connection
 
653
                   .ClientSession(self.request,
 
654
                                  gnutls.connection
 
655
                                  .X509Credentials()))
 
656
        
 
657
        line = self.request.makefile().readline()
 
658
        logger.debug(u"Protocol version: %r", line)
 
659
        try:
 
660
            if int(line.strip().split()[0]) > 1:
 
661
                raise RuntimeError
 
662
        except (ValueError, IndexError, RuntimeError), error:
 
663
            logger.error(u"Unknown protocol version: %s", error)
 
664
            return
 
665
        
 
666
        # Note: gnutls.connection.X509Credentials is really a generic
 
667
        # GnuTLS certificate credentials object so long as no X.509
 
668
        # keys are added to it.  Therefore, we can use it here despite
 
669
        # using OpenPGP certificates.
 
670
        
 
671
        #priority = ':'.join(("NONE", "+VERS-TLS1.1", "+AES-256-CBC",
 
672
        #                "+SHA1", "+COMP-NULL", "+CTYPE-OPENPGP",
 
673
        #                "+DHE-DSS"))
 
674
        # Use a fallback default, since this MUST be set.
 
675
        priority = self.server.settings.get("priority", "NORMAL")
 
676
        (gnutls.library.functions
 
677
         .gnutls_priority_set_direct(session._c_object,
 
678
                                     priority, None))
 
679
        
 
680
        try:
 
681
            session.handshake()
 
682
        except gnutls.errors.GNUTLSError, error:
 
683
            logger.warning(u"Handshake failed: %s", error)
 
684
            # Do not run session.bye() here: the session is not
 
685
            # established.  Just abandon the request.
 
686
            return
 
687
        try:
 
688
            fpr = fingerprint(peer_certificate(session))
 
689
        except (TypeError, gnutls.errors.GNUTLSError), error:
 
690
            logger.warning(u"Bad certificate: %s", error)
 
691
            session.bye()
 
692
            return
 
693
        logger.debug(u"Fingerprint: %s", fpr)
 
694
        for c in self.server.clients:
 
695
            if c.fingerprint == fpr:
 
696
                client = c
 
697
                break
 
698
        else:
 
699
            logger.warning(u"Client not found for fingerprint: %s",
 
700
                           fpr)
 
701
            session.bye()
 
702
            return
 
703
        # Have to check if client.still_valid(), since it is possible
 
704
        # that the client timed out while establishing the GnuTLS
 
705
        # session.
 
706
        if not client.still_valid():
 
707
            logger.warning(u"Client %(name)s is invalid",
 
708
                           vars(client))
 
709
            session.bye()
 
710
            return
 
711
        ## This won't work here, since we're in a fork.
 
712
        # client.bump_timeout()
 
713
        sent_size = 0
 
714
        while sent_size < len(client.secret):
 
715
            sent = session.send(client.secret[sent_size:])
 
716
            logger.debug(u"Sent: %d, remaining: %d",
 
717
                         sent, len(client.secret)
 
718
                         - (sent_size + sent))
 
719
            sent_size += sent
 
720
        session.bye()
 
721
 
 
722
 
 
723
class IPv6_TCPServer(SocketServer.ForkingMixIn,
 
724
                     SocketServer.TCPServer, object):
 
725
    """IPv6 TCP server.  Accepts 'None' as address and/or port.
1418
726
    Attributes:
 
727
        settings:       Server settings
 
728
        clients:        Set() of Client objects
1419
729
        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
1422
730
    """
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)
 
731
    address_family = socket.AF_INET6
 
732
    def __init__(self, *args, **kwargs):
 
733
        if "settings" in kwargs:
 
734
            self.settings = kwargs["settings"]
 
735
            del kwargs["settings"]
 
736
        if "clients" in kwargs:
 
737
            self.clients = kwargs["clients"]
 
738
            del kwargs["clients"]
 
739
        self.enabled = False
 
740
        super(IPv6_TCPServer, self).__init__(*args, **kwargs)
1430
741
    def server_bind(self):
1431
742
        """This overrides the normal server_bind() function
1432
743
        to bind to an interface if one was specified, and also NOT to
1433
744
        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
 
745
        if self.settings["interface"]:
 
746
            # 25 is from /usr/include/asm-i486/socket.h
 
747
            SO_BINDTODEVICE = getattr(socket, "SO_BINDTODEVICE", 25)
 
748
            try:
 
749
                self.socket.setsockopt(socket.SOL_SOCKET,
 
750
                                       SO_BINDTODEVICE,
 
751
                                       self.settings["interface"])
 
752
            except socket.error, error:
 
753
                if error[0] == errno.EPERM:
 
754
                    logger.error(u"No permission to"
 
755
                                 u" bind to interface %s",
 
756
                                 self.settings["interface"])
 
757
                else:
 
758
                    raise error
1456
759
        # Only bind(2) the socket if we really need to.
1457
760
        if self.server_address[0] or self.server_address[1]:
1458
761
            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,
 
762
                in6addr_any = "::"
 
763
                self.server_address = (in6addr_any,
1464
764
                                       self.server_address[1])
1465
765
            elif not self.server_address[1]:
1466
766
                self.server_address = (self.server_address[0],
1467
767
                                       0)
1468
 
#                 if self.interface:
 
768
#                 if self.settings["interface"]:
1469
769
#                     self.server_address = (self.server_address[0],
1470
770
#                                            0, # port
1471
771
#                                            0, # flowinfo
1472
772
#                                            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)
 
773
#                                            (self.settings
 
774
#                                             ["interface"]))
 
775
            return super(IPv6_TCPServer, self).server_bind()
1500
776
    def server_activate(self):
1501
777
        if self.enabled:
1502
 
            return socketserver.TCPServer.server_activate(self)
 
778
            return super(IPv6_TCPServer, self).server_activate()
1503
779
    def enable(self):
1504
780
        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
1581
781
 
1582
782
 
1583
783
def string_to_delta(interval):
1584
784
    """Parse a string and return a datetime.timedelta
1585
 
    
 
785
 
1586
786
    >>> string_to_delta('7d')
1587
787
    datetime.timedelta(7)
1588
788
    >>> string_to_delta('60s')
1591
791
    datetime.timedelta(0, 3600)
1592
792
    >>> string_to_delta('24h')
1593
793
    datetime.timedelta(1)
1594
 
    >>> string_to_delta('1w')
 
794
    >>> string_to_delta(u'1w')
1595
795
    datetime.timedelta(7)
1596
796
    >>> string_to_delta('5m 30s')
1597
797
    datetime.timedelta(0, 330)
1601
801
        try:
1602
802
            suffix = unicode(s[-1])
1603
803
            value = int(s[:-1])
1604
 
            if suffix == "d":
 
804
            if suffix == u"d":
1605
805
                delta = datetime.timedelta(value)
1606
 
            elif suffix == "s":
 
806
            elif suffix == u"s":
1607
807
                delta = datetime.timedelta(0, value)
1608
 
            elif suffix == "m":
 
808
            elif suffix == u"m":
1609
809
                delta = datetime.timedelta(0, 0, 0, 0, value)
1610
 
            elif suffix == "h":
 
810
            elif suffix == u"h":
1611
811
                delta = datetime.timedelta(0, 0, 0, 0, 0, value)
1612
 
            elif suffix == "w":
 
812
            elif suffix == u"w":
1613
813
                delta = datetime.timedelta(0, 0, 0, 0, 0, 0, value)
1614
814
            else:
1615
 
                raise ValueError("Unknown suffix %r" % suffix)
1616
 
        except (ValueError, IndexError), e:
1617
 
            raise ValueError(*(e.args))
 
815
                raise ValueError
 
816
        except (ValueError, IndexError):
 
817
            raise ValueError
1618
818
        timevalue += delta
1619
819
    return timevalue
1620
820
 
1621
821
 
 
822
def server_state_changed(state):
 
823
    """Derived from the Avahi example code"""
 
824
    if state == avahi.SERVER_COLLISION:
 
825
        logger.error(u"Zeroconf server name collision")
 
826
        service.remove()
 
827
    elif state == avahi.SERVER_RUNNING:
 
828
        service.add()
 
829
 
 
830
 
 
831
def entry_group_state_changed(state, error):
 
832
    """Derived from the Avahi example code"""
 
833
    logger.debug(u"Avahi state change: %i", state)
 
834
    
 
835
    if state == avahi.ENTRY_GROUP_ESTABLISHED:
 
836
        logger.debug(u"Zeroconf service established.")
 
837
    elif state == avahi.ENTRY_GROUP_COLLISION:
 
838
        logger.warning(u"Zeroconf service name collision.")
 
839
        service.rename()
 
840
    elif state == avahi.ENTRY_GROUP_FAILURE:
 
841
        logger.critical(u"Avahi: Error in group state changed %s",
 
842
                        unicode(error))
 
843
        raise AvahiGroupError(u"State changed: %s" % unicode(error))
 
844
 
1622
845
def if_nametoindex(interface):
1623
 
    """Call the C function if_nametoindex(), or equivalent
1624
 
    
1625
 
    Note: This function cannot accept a unicode string."""
 
846
    """Call the C function if_nametoindex(), or equivalent"""
1626
847
    global if_nametoindex
1627
848
    try:
1628
849
        if_nametoindex = (ctypes.cdll.LoadLibrary
1629
850
                          (ctypes.util.find_library("c"))
1630
851
                          .if_nametoindex)
1631
852
    except (OSError, AttributeError):
1632
 
        logger.warning("Doing if_nametoindex the hard way")
 
853
        if "struct" not in sys.modules:
 
854
            import struct
 
855
        if "fcntl" not in sys.modules:
 
856
            import fcntl
1633
857
        def if_nametoindex(interface):
1634
858
            "Get an interface index the hard way, i.e. using fcntl()"
1635
859
            SIOCGIFINDEX = 0x8933  # From /usr/include/linux/sockios.h
1636
 
            with contextlib.closing(socket.socket()) as s:
 
860
            with closing(socket.socket()) as s:
1637
861
                ifreq = fcntl.ioctl(s, SIOCGIFINDEX,
1638
 
                                    struct.pack(str("16s16x"),
1639
 
                                                interface))
1640
 
            interface_index = struct.unpack(str("I"),
1641
 
                                            ifreq[16:20])[0]
 
862
                                    struct.pack("16s16x", interface))
 
863
            interface_index = struct.unpack("I", ifreq[16:20])[0]
1642
864
            return interface_index
1643
865
    return if_nametoindex(interface)
1644
866
 
1645
867
 
1646
868
def daemon(nochdir = False, noclose = False):
1647
869
    """See daemon(3).  Standard BSD Unix function.
1648
 
    
1649
870
    This should really exist as os.daemon, but it doesn't (yet)."""
1650
871
    if os.fork():
1651
872
        sys.exit()
1659
880
        null = os.open(os.path.devnull, os.O_NOCTTY | os.O_RDWR)
1660
881
        if not stat.S_ISCHR(os.fstat(null).st_mode):
1661
882
            raise OSError(errno.ENODEV,
1662
 
                          "%s not a character device"
1663
 
                          % os.path.devnull)
 
883
                          "/dev/null not a character device")
1664
884
        os.dup2(null, sys.stdin.fileno())
1665
885
        os.dup2(null, sys.stdout.fileno())
1666
886
        os.dup2(null, sys.stderr.fileno())
1669
889
 
1670
890
 
1671
891
def main():
1672
 
    
1673
 
    ##################################################################
1674
 
    # Parsing of options, both command line and config file
1675
 
    
1676
892
    parser = optparse.OptionParser(version = "%%prog %s" % version)
1677
893
    parser.add_option("-i", "--interface", type="string",
1678
894
                      metavar="IF", help="Bind to interface IF")
1685
901
    parser.add_option("--debug", action="store_true",
1686
902
                      help="Debug mode; run in foreground and log to"
1687
903
                      " terminal")
1688
 
    parser.add_option("--debuglevel", type="string", metavar="LEVEL",
1689
 
                      help="Debug level for stdout output")
1690
904
    parser.add_option("--priority", type="string", help="GnuTLS"
1691
905
                      " priority string (see GnuTLS documentation)")
1692
 
    parser.add_option("--servicename", type="string",
1693
 
                      metavar="NAME", help="Zeroconf service name")
 
906
    parser.add_option("--servicename", type="string", metavar="NAME",
 
907
                      help="Zeroconf service name")
1694
908
    parser.add_option("--configdir", type="string",
1695
909
                      default="/etc/mandos", metavar="DIR",
1696
910
                      help="Directory to search for configuration"
1697
911
                      " files")
1698
912
    parser.add_option("--no-dbus", action="store_false",
1699
 
                      dest="use_dbus", help="Do not provide D-Bus"
1700
 
                      " system bus interface")
1701
 
    parser.add_option("--no-ipv6", action="store_false",
1702
 
                      dest="use_ipv6", help="Do not use IPv6")
 
913
                      dest="use_dbus",
 
914
                      help="Do not provide D-Bus system bus"
 
915
                      " interface")
1703
916
    options = parser.parse_args()[0]
1704
917
    
1705
918
    if options.check:
1716
929
                        "SECURE256:!CTYPE-X.509:+CTYPE-OPENPGP",
1717
930
                        "servicename": "Mandos",
1718
931
                        "use_dbus": "True",
1719
 
                        "use_ipv6": "True",
1720
 
                        "debuglevel": "",
1721
932
                        }
1722
933
    
1723
934
    # Parse config file for server-global settings
1724
 
    server_config = configparser.SafeConfigParser(server_defaults)
 
935
    server_config = ConfigParser.SafeConfigParser(server_defaults)
1725
936
    del server_defaults
1726
 
    server_config.read(os.path.join(options.configdir,
1727
 
                                    "mandos.conf"))
 
937
    server_config.read(os.path.join(options.configdir, "mandos.conf"))
1728
938
    # Convert the SafeConfigParser object to a dict
1729
939
    server_settings = server_config.defaults()
1730
 
    # Use the appropriate methods on the non-string config options
1731
 
    for option in ("debug", "use_dbus", "use_ipv6"):
1732
 
        server_settings[option] = server_config.getboolean("DEFAULT",
1733
 
                                                           option)
1734
 
    if server_settings["port"]:
1735
 
        server_settings["port"] = server_config.getint("DEFAULT",
1736
 
                                                       "port")
 
940
    # Use getboolean on the boolean config options
 
941
    server_settings["debug"] = (server_config.getboolean
 
942
                                ("DEFAULT", "debug"))
 
943
    server_settings["use_dbus"] = (server_config.getboolean
 
944
                                   ("DEFAULT", "use_dbus"))
1737
945
    del server_config
1738
946
    
1739
947
    # Override the settings from the config file with command line
1740
948
    # options, if set.
1741
949
    for option in ("interface", "address", "port", "debug",
1742
950
                   "priority", "servicename", "configdir",
1743
 
                   "use_dbus", "use_ipv6", "debuglevel"):
 
951
                   "use_dbus"):
1744
952
        value = getattr(options, option)
1745
953
        if value is not None:
1746
954
            server_settings[option] = value
1747
955
    del options
1748
 
    # Force all strings to be unicode
1749
 
    for option in server_settings.keys():
1750
 
        if type(server_settings[option]) is str:
1751
 
            server_settings[option] = unicode(server_settings[option])
1752
956
    # Now we have our good server settings in "server_settings"
1753
957
    
1754
 
    ##################################################################
1755
 
    
1756
958
    # For convenience
1757
959
    debug = server_settings["debug"]
1758
 
    debuglevel = server_settings["debuglevel"]
1759
960
    use_dbus = server_settings["use_dbus"]
1760
 
    use_ipv6 = server_settings["use_ipv6"]
1761
 
 
 
961
    
 
962
    if not debug:
 
963
        syslogger.setLevel(logging.WARNING)
 
964
        console.setLevel(logging.WARNING)
 
965
    
1762
966
    if server_settings["servicename"] != "Mandos":
1763
967
        syslogger.setFormatter(logging.Formatter
1764
 
                               ('Mandos (%s) [%%(process)d]:'
1765
 
                                ' %%(levelname)s: %%(message)s'
 
968
                               ('Mandos (%s): %%(levelname)s:'
 
969
                                ' %%(message)s'
1766
970
                                % server_settings["servicename"]))
1767
971
    
1768
972
    # Parse config file with clients
1770
974
                        "interval": "5m",
1771
975
                        "checker": "fping -q -- %%(host)s",
1772
976
                        "host": "",
1773
 
                        "approval_delay": "0s",
1774
 
                        "approval_duration": "1s",
1775
977
                        }
1776
 
    client_config = configparser.SafeConfigParser(client_defaults)
 
978
    client_config = ConfigParser.SafeConfigParser(client_defaults)
1777
979
    client_config.read(os.path.join(server_settings["configdir"],
1778
980
                                    "clients.conf"))
1779
981
    
1780
 
    global mandos_dbus_service
1781
 
    mandos_dbus_service = None
1782
 
    
1783
 
    tcp_server = MandosServer((server_settings["address"],
1784
 
                               server_settings["port"]),
1785
 
                              ClientHandler,
1786
 
                              interface=(server_settings["interface"]
1787
 
                                         or None),
1788
 
                              use_ipv6=use_ipv6,
1789
 
                              gnutls_priority=
1790
 
                              server_settings["priority"],
1791
 
                              use_dbus=use_dbus)
1792
 
    if not debug:
1793
 
        pidfilename = "/var/run/mandos.pid"
1794
 
        try:
1795
 
            pidfile = open(pidfilename, "w")
1796
 
        except IOError:
1797
 
            logger.error("Could not open file %r", pidfilename)
 
982
    clients = Set()
 
983
    tcp_server = IPv6_TCPServer((server_settings["address"],
 
984
                                 server_settings["port"]),
 
985
                                TCP_handler,
 
986
                                settings=server_settings,
 
987
                                clients=clients)
 
988
    pidfilename = "/var/run/mandos.pid"
 
989
    try:
 
990
        pidfile = open(pidfilename, "w")
 
991
    except IOError, error:
 
992
        logger.error("Could not open file %r", pidfilename)
1798
993
    
1799
994
    try:
1800
995
        uid = pwd.getpwnam("_mandos").pw_uid
1806
1001
        except KeyError:
1807
1002
            try:
1808
1003
                uid = pwd.getpwnam("nobody").pw_uid
1809
 
                gid = pwd.getpwnam("nobody").pw_gid
 
1004
                gid = pwd.getpwnam("nogroup").pw_gid
1810
1005
            except KeyError:
1811
1006
                uid = 65534
1812
1007
                gid = 65534
1813
1008
    try:
 
1009
        os.setuid(uid)
1814
1010
        os.setgid(gid)
1815
 
        os.setuid(uid)
1816
1011
    except OSError, error:
1817
1012
        if error[0] != errno.EPERM:
1818
1013
            raise error
1819
1014
    
1820
 
    if not debug and not debuglevel:
1821
 
        syslogger.setLevel(logging.WARNING)
1822
 
        console.setLevel(logging.WARNING)
1823
 
    if debuglevel:
1824
 
        level = getattr(logging, debuglevel.upper())
1825
 
        syslogger.setLevel(level)
1826
 
        console.setLevel(level)
1827
 
 
 
1015
    global service
 
1016
    service = AvahiService(name = server_settings["servicename"],
 
1017
                           servicetype = "_mandos._tcp", )
 
1018
    if server_settings["interface"]:
 
1019
        service.interface = (if_nametoindex
 
1020
                             (server_settings["interface"]))
 
1021
    
 
1022
    global main_loop
 
1023
    global bus
 
1024
    global server
 
1025
    # From the Avahi example code
 
1026
    DBusGMainLoop(set_as_default=True )
 
1027
    main_loop = gobject.MainLoop()
 
1028
    bus = dbus.SystemBus()
 
1029
    server = dbus.Interface(bus.get_object(avahi.DBUS_NAME,
 
1030
                                           avahi.DBUS_PATH_SERVER),
 
1031
                            avahi.DBUS_INTERFACE_SERVER)
 
1032
    # End of Avahi example code
 
1033
    if use_dbus:
 
1034
        bus_name = dbus.service.BusName(u"org.mandos-system.Mandos",
 
1035
                                        bus)
 
1036
    
 
1037
    clients.update(Set(Client(name = section,
 
1038
                              config
 
1039
                              = dict(client_config.items(section)),
 
1040
                              use_dbus = use_dbus)
 
1041
                       for section in client_config.sections()))
 
1042
    if not clients:
 
1043
        logger.warning(u"No clients defined")
 
1044
    
1828
1045
    if debug:
1829
 
        # Enable all possible GnuTLS debugging
1830
 
        
1831
 
        # "Use a log level over 10 to enable all debugging options."
1832
 
        # - GnuTLS manual
1833
 
        gnutls.library.functions.gnutls_global_set_log_level(11)
1834
 
        
1835
 
        @gnutls.library.types.gnutls_log_func
1836
 
        def debug_gnutls(level, string):
1837
 
            logger.debug("GnuTLS: %s", string[:-1])
1838
 
        
1839
 
        (gnutls.library.functions
1840
 
         .gnutls_global_set_log_function(debug_gnutls))
1841
 
        
1842
1046
        # Redirect stdin so all checkers get /dev/null
1843
1047
        null = os.open(os.path.devnull, os.O_NOCTTY | os.O_RDWR)
1844
1048
        os.dup2(null, sys.stdin.fileno())
1847
1051
    else:
1848
1052
        # No console logging
1849
1053
        logger.removeHandler(console)
1850
 
    
1851
 
    # Need to fork before connecting to D-Bus
1852
 
    if not debug:
1853
1054
        # Close all input and output, do double fork, etc.
1854
1055
        daemon()
1855
1056
    
1856
 
    global main_loop
1857
 
    # From the Avahi example code
1858
 
    DBusGMainLoop(set_as_default=True )
1859
 
    main_loop = gobject.MainLoop()
1860
 
    bus = dbus.SystemBus()
1861
 
    # End of Avahi example code
1862
 
    if use_dbus:
1863
 
        try:
1864
 
            bus_name = dbus.service.BusName("se.bsnet.fukt.Mandos",
1865
 
                                            bus, do_not_queue=True)
1866
 
        except dbus.exceptions.NameExistsException, e:
1867
 
            logger.error(unicode(e) + ", disabling D-Bus")
1868
 
            use_dbus = False
1869
 
            server_settings["use_dbus"] = False
1870
 
            tcp_server.use_dbus = False
1871
 
    protocol = avahi.PROTO_INET6 if use_ipv6 else avahi.PROTO_INET
1872
 
    service = AvahiService(name = server_settings["servicename"],
1873
 
                           servicetype = "_mandos._tcp",
1874
 
                           protocol = protocol, bus = bus)
1875
 
    if server_settings["interface"]:
1876
 
        service.interface = (if_nametoindex
1877
 
                             (str(server_settings["interface"])))
1878
 
    
1879
 
    global multiprocessing_manager
1880
 
    multiprocessing_manager = multiprocessing.Manager()
1881
 
    
1882
 
    client_class = Client
1883
 
    if use_dbus:
1884
 
        client_class = functools.partial(ClientDBus, bus = bus)
1885
 
    def client_config_items(config, section):
1886
 
        special_settings = {
1887
 
            "approved_by_default":
1888
 
                lambda: config.getboolean(section,
1889
 
                                          "approved_by_default"),
1890
 
            }
1891
 
        for name, value in config.items(section):
1892
 
            try:
1893
 
                yield (name, special_settings[name]())
1894
 
            except KeyError:
1895
 
                yield (name, value)
1896
 
    
1897
 
    tcp_server.clients.update(set(
1898
 
            client_class(name = section,
1899
 
                         config= dict(client_config_items(
1900
 
                        client_config, section)))
1901
 
            for section in client_config.sections()))
1902
 
    if not tcp_server.clients:
1903
 
        logger.warning("No clients defined")
 
1057
    try:
 
1058
        pid = os.getpid()
 
1059
        pidfile.write(str(pid) + "\n")
 
1060
        pidfile.close()
 
1061
        del pidfile
 
1062
    except IOError:
 
1063
        logger.error(u"Could not write to file %r with PID %d",
 
1064
                     pidfilename, pid)
 
1065
    except NameError:
 
1066
        # "pidfile" was never created
 
1067
        pass
 
1068
    del pidfilename
 
1069
    
 
1070
    def cleanup():
 
1071
        "Cleanup function; run on exit"
 
1072
        global group
 
1073
        # From the Avahi example code
 
1074
        if not group is None:
 
1075
            group.Free()
 
1076
            group = None
 
1077
        # End of Avahi example code
1904
1078
        
 
1079
        while clients:
 
1080
            client = clients.pop()
 
1081
            client.disable_hook = None
 
1082
            client.disable()
 
1083
    
 
1084
    atexit.register(cleanup)
 
1085
    
1905
1086
    if not debug:
1906
 
        try:
1907
 
            with pidfile:
1908
 
                pid = os.getpid()
1909
 
                pidfile.write(str(pid) + "\n".encode("utf-8"))
1910
 
            del pidfile
1911
 
        except IOError:
1912
 
            logger.error("Could not write to file %r with PID %d",
1913
 
                         pidfilename, pid)
1914
 
        except NameError:
1915
 
            # "pidfile" was never created
1916
 
            pass
1917
 
        del pidfilename
1918
 
        
1919
1087
        signal.signal(signal.SIGINT, signal.SIG_IGN)
1920
 
 
1921
1088
    signal.signal(signal.SIGHUP, lambda signum, frame: sys.exit())
1922
1089
    signal.signal(signal.SIGTERM, lambda signum, frame: sys.exit())
1923
1090
    
1924
1091
    if use_dbus:
1925
 
        class MandosDBusService(dbus.service.Object):
 
1092
        class MandosServer(dbus.service.Object):
1926
1093
            """A D-Bus proxy object"""
1927
1094
            def __init__(self):
1928
 
                dbus.service.Object.__init__(self, bus, "/")
1929
 
            _interface = "se.bsnet.fukt.Mandos"
1930
 
            
 
1095
                dbus.service.Object.__init__(self, bus,
 
1096
                                             "/Mandos")
 
1097
            _interface = u"org.mandos_system.Mandos"
 
1098
 
 
1099
            @dbus.service.signal(_interface, signature="oa{sv}")
 
1100
            def ClientAdded(self, objpath, properties):
 
1101
                "D-Bus signal"
 
1102
                pass
 
1103
 
1931
1104
            @dbus.service.signal(_interface, signature="o")
1932
 
            def ClientAdded(self, objpath):
1933
 
                "D-Bus signal"
1934
 
                pass
1935
 
            
1936
 
            @dbus.service.signal(_interface, signature="ss")
1937
 
            def ClientNotFound(self, fingerprint, address):
1938
 
                "D-Bus signal"
1939
 
                pass
1940
 
            
1941
 
            @dbus.service.signal(_interface, signature="os")
1942
 
            def ClientRemoved(self, objpath, name):
1943
 
                "D-Bus signal"
1944
 
                pass
1945
 
            
 
1105
            def ClientRemoved(self, objpath):
 
1106
                "D-Bus signal"
 
1107
                pass
 
1108
 
1946
1109
            @dbus.service.method(_interface, out_signature="ao")
1947
1110
            def GetAllClients(self):
1948
 
                "D-Bus method"
1949
 
                return dbus.Array(c.dbus_object_path
1950
 
                                  for c in tcp_server.clients)
1951
 
            
1952
 
            @dbus.service.method(_interface,
1953
 
                                 out_signature="a{oa{sv}}")
 
1111
                return dbus.Array(c.dbus_object_path for c in clients)
 
1112
 
 
1113
            @dbus.service.method(_interface, out_signature="a{oa{sv}}")
1954
1114
            def GetAllClientsWithProperties(self):
1955
 
                "D-Bus method"
1956
1115
                return dbus.Dictionary(
1957
 
                    ((c.dbus_object_path, c.GetAll(""))
1958
 
                     for c in tcp_server.clients),
 
1116
                    ((c.dbus_object_path, c.GetAllProperties())
 
1117
                     for c in clients),
1959
1118
                    signature="oa{sv}")
1960
 
            
 
1119
 
1961
1120
            @dbus.service.method(_interface, in_signature="o")
1962
1121
            def RemoveClient(self, object_path):
1963
 
                "D-Bus method"
1964
 
                for c in tcp_server.clients:
 
1122
                for c in clients:
1965
1123
                    if c.dbus_object_path == object_path:
1966
 
                        tcp_server.clients.remove(c)
1967
 
                        c.remove_from_connection()
 
1124
                        clients.remove(c)
1968
1125
                        # Don't signal anything except ClientRemoved
1969
 
                        c.disable(quiet=True)
 
1126
                        c.use_dbus = False
 
1127
                        c.disable()
1970
1128
                        # Emit D-Bus signal
1971
 
                        self.ClientRemoved(object_path, c.name)
 
1129
                        self.ClientRemoved(object_path)
1972
1130
                        return
1973
 
                raise KeyError(object_path)
1974
 
            
 
1131
                raise KeyError
 
1132
            @dbus.service.method(_interface)
 
1133
            def Quit(self):
 
1134
                main_loop.quit()
 
1135
 
1975
1136
            del _interface
1976
 
        
1977
 
        mandos_dbus_service = MandosDBusService()
1978
 
    
1979
 
    def cleanup():
1980
 
        "Cleanup function; run on exit"
1981
 
        service.cleanup()
1982
 
        
1983
 
        while tcp_server.clients:
1984
 
            client = tcp_server.clients.pop()
1985
 
            if use_dbus:
1986
 
                client.remove_from_connection()
1987
 
            client.disable_hook = None
1988
 
            # Don't signal anything except ClientRemoved
1989
 
            client.disable(quiet=True)
1990
 
            if use_dbus:
1991
 
                # Emit D-Bus signal
1992
 
                mandos_dbus_service.ClientRemoved(client.dbus_object_path,
1993
 
                                                  client.name)
1994
 
    
1995
 
    atexit.register(cleanup)
1996
 
    
1997
 
    for client in tcp_server.clients:
 
1137
    
 
1138
        mandos_server = MandosServer()
 
1139
    
 
1140
    for client in clients:
1998
1141
        if use_dbus:
1999
1142
            # Emit D-Bus signal
2000
 
            mandos_dbus_service.ClientAdded(client.dbus_object_path)
 
1143
            mandos_server.ClientAdded(client.dbus_object_path,
 
1144
                                      client.GetAllProperties())
2001
1145
        client.enable()
2002
1146
    
2003
1147
    tcp_server.enable()
2005
1149
    
2006
1150
    # Find out what port we got
2007
1151
    service.port = tcp_server.socket.getsockname()[1]
2008
 
    if use_ipv6:
2009
 
        logger.info("Now listening on address %r, port %d,"
2010
 
                    " flowinfo %d, scope_id %d"
2011
 
                    % tcp_server.socket.getsockname())
2012
 
    else:                       # IPv4
2013
 
        logger.info("Now listening on address %r, port %d"
2014
 
                    % tcp_server.socket.getsockname())
 
1152
    logger.info(u"Now listening on address %r, port %d, flowinfo %d,"
 
1153
                u" scope_id %d" % tcp_server.socket.getsockname())
2015
1154
    
2016
1155
    #service.interface = tcp_server.socket.getsockname()[3]
2017
1156
    
2018
1157
    try:
2019
1158
        # From the Avahi example code
 
1159
        server.connect_to_signal("StateChanged", server_state_changed)
2020
1160
        try:
2021
 
            service.activate()
 
1161
            server_state_changed(server.GetState())
2022
1162
        except dbus.exceptions.DBusException, error:
2023
 
            logger.critical("DBusException: %s", error)
2024
 
            cleanup()
 
1163
            logger.critical(u"DBusException: %s", error)
2025
1164
            sys.exit(1)
2026
1165
        # End of Avahi example code
2027
1166
        
2030
1169
                             (tcp_server.handle_request
2031
1170
                              (*args[2:], **kwargs) or True))
2032
1171
        
2033
 
        logger.debug("Starting main loop")
 
1172
        logger.debug(u"Starting main loop")
2034
1173
        main_loop.run()
2035
1174
    except AvahiError, error:
2036
 
        logger.critical("AvahiError: %s", error)
2037
 
        cleanup()
 
1175
        logger.critical(u"AvahiError: %s", error)
2038
1176
        sys.exit(1)
2039
1177
    except KeyboardInterrupt:
2040
1178
        if debug:
2041
 
            print("", file=sys.stderr)
2042
 
        logger.debug("Server received KeyboardInterrupt")
2043
 
    logger.debug("Server exiting")
2044
 
    # Must run before the D-Bus bus name gets deregistered
2045
 
    cleanup()
 
1179
            print
2046
1180
 
2047
1181
if __name__ == '__main__':
2048
1182
    main()