/mandos/trunk

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  • Committer: Teddy Hogeborn
  • Date: 2009-01-17 00:26:13 UTC
  • Revision ID: teddy@fukt.bsnet.se-20090117002613-lg5x2b8mnmi3alqy
Fix problem found using cppcheck, thanks to George Danchev
<danchev@spnet.net> for the report and fix:

* plugin-runner.c (getplugin): Bug fix: Free the plugin struct in case
                               of strdup failure.

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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
28
28
# along with this program.  If not, see
29
29
# <http://www.gnu.org/licenses/>.
30
30
31
 
# Contact the authors at <mandos@recompile.se>.
 
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
 
import argparse
 
38
import optparse
40
39
import datetime
41
40
import errno
42
41
import gnutls.crypto
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
65
 
import types
66
 
import hashlib
 
59
from contextlib import closing
67
60
 
68
61
import dbus
69
62
import dbus.service
72
65
from dbus.mainloop.glib import DBusGMainLoop
73
66
import ctypes
74
67
import ctypes.util
75
 
import xml.dom.minidom
76
 
import inspect
77
 
import Crypto.Cipher.AES
78
 
 
79
 
try:
80
 
    SO_BINDTODEVICE = socket.SO_BINDTODEVICE
81
 
except AttributeError:
82
 
    try:
83
 
        from IN import SO_BINDTODEVICE
84
 
    except ImportError:
85
 
        SO_BINDTODEVICE = None
86
 
 
87
 
 
88
 
version = "1.4.1"
89
 
 
90
 
logger = logging.getLogger()
91
 
stored_state_path = "/var/lib/mandos/clients.pickle"
92
 
 
 
68
 
 
69
version = "1.0.4"
 
70
 
 
71
logger = logging.Logger('mandos')
93
72
syslogger = (logging.handlers.SysLogHandler
94
73
             (facility = logging.handlers.SysLogHandler.LOG_DAEMON,
95
 
              address = str("/dev/log")))
 
74
              address = "/dev/log"))
96
75
syslogger.setFormatter(logging.Formatter
97
 
                       ('Mandos [%(process)d]: %(levelname)s:'
98
 
                        ' %(message)s'))
 
76
                       ('Mandos: %(levelname)s: %(message)s'))
99
77
logger.addHandler(syslogger)
100
78
 
101
79
console = logging.StreamHandler()
102
 
console.setFormatter(logging.Formatter('%(asctime)s %(name)s'
103
 
                                       ' [%(process)d]:'
104
 
                                       ' %(levelname)s:'
 
80
console.setFormatter(logging.Formatter('%(name)s: %(levelname)s:'
105
81
                                       ' %(message)s'))
106
82
logger.addHandler(console)
107
83
 
108
 
 
109
84
class AvahiError(Exception):
110
85
    def __init__(self, value, *args, **kwargs):
111
86
        self.value = value
122
97
 
123
98
class AvahiService(object):
124
99
    """An Avahi (Zeroconf) service.
125
 
    
126
100
    Attributes:
127
101
    interface: integer; avahi.IF_UNSPEC or an interface index.
128
102
               Used to optionally bind to the specified interface.
136
110
    max_renames: integer; maximum number of renames
137
111
    rename_count: integer; counter so we only rename after collisions
138
112
                  a sensible number of times
139
 
    group: D-Bus Entry Group
140
 
    server: D-Bus Server
141
 
    bus: dbus.SystemBus()
142
113
    """
143
114
    def __init__(self, interface = avahi.IF_UNSPEC, name = None,
144
115
                 servicetype = None, port = None, TXT = None,
145
 
                 domain = "", host = "", max_renames = 32768,
146
 
                 protocol = avahi.PROTO_UNSPEC, bus = None):
 
116
                 domain = "", host = "", max_renames = 32768):
147
117
        self.interface = interface
148
118
        self.name = name
149
119
        self.type = servicetype
153
123
        self.host = host
154
124
        self.rename_count = 0
155
125
        self.max_renames = max_renames
156
 
        self.protocol = protocol
157
 
        self.group = None       # our entry group
158
 
        self.server = None
159
 
        self.bus = bus
160
 
        self.entry_group_state_changed_match = None
161
126
    def rename(self):
162
127
        """Derived from the Avahi example code"""
163
128
        if self.rename_count >= self.max_renames:
164
 
            logger.critical("No suitable Zeroconf service name found"
165
 
                            " after %i retries, exiting.",
 
129
            logger.critical(u"No suitable Zeroconf service name found"
 
130
                            u" after %i retries, exiting.",
166
131
                            self.rename_count)
167
 
            raise AvahiServiceError("Too many renames")
168
 
        self.name = unicode(self.server
169
 
                            .GetAlternativeServiceName(self.name))
170
 
        logger.info("Changing Zeroconf service name to %r ...",
171
 
                    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))
 
136
        syslogger.setFormatter(logging.Formatter
 
137
                               ('Mandos (%s): %%(levelname)s:'
 
138
                                ' %%(message)s' % self.name))
172
139
        self.remove()
173
 
        try:
174
 
            self.add()
175
 
        except dbus.exceptions.DBusException as error:
176
 
            logger.critical("DBusException: %s", error)
177
 
            self.cleanup()
178
 
            os._exit(1)
 
140
        self.add()
179
141
        self.rename_count += 1
180
142
    def remove(self):
181
143
        """Derived from the Avahi example code"""
182
 
        if self.entry_group_state_changed_match is not None:
183
 
            self.entry_group_state_changed_match.remove()
184
 
            self.entry_group_state_changed_match = None
185
 
        if self.group is not None:
186
 
            self.group.Reset()
 
144
        if group is not None:
 
145
            group.Reset()
187
146
    def add(self):
188
147
        """Derived from the Avahi example code"""
189
 
        self.remove()
190
 
        if self.group is None:
191
 
            self.group = dbus.Interface(
192
 
                self.bus.get_object(avahi.DBUS_NAME,
193
 
                                    self.server.EntryGroupNew()),
194
 
                avahi.DBUS_INTERFACE_ENTRY_GROUP)
195
 
        self.entry_group_state_changed_match = (
196
 
            self.group.connect_to_signal(
197
 
                'StateChanged', self.entry_group_state_changed))
198
 
        logger.debug("Adding Zeroconf service '%s' of type '%s' ...",
199
 
                     self.name, self.type)
200
 
        self.group.AddService(
201
 
            self.interface,
202
 
            self.protocol,
203
 
            dbus.UInt32(0),     # flags
204
 
            self.name, self.type,
205
 
            self.domain, self.host,
206
 
            dbus.UInt16(self.port),
207
 
            avahi.string_array_to_txt_array(self.TXT))
208
 
        self.group.Commit()
209
 
    def entry_group_state_changed(self, state, error):
210
 
        """Derived from the Avahi example code"""
211
 
        logger.debug("Avahi entry group state change: %i", state)
212
 
        
213
 
        if state == avahi.ENTRY_GROUP_ESTABLISHED:
214
 
            logger.debug("Zeroconf service established.")
215
 
        elif state == avahi.ENTRY_GROUP_COLLISION:
216
 
            logger.info("Zeroconf service name collision.")
217
 
            self.rename()
218
 
        elif state == avahi.ENTRY_GROUP_FAILURE:
219
 
            logger.critical("Avahi: Error in group state changed %s",
220
 
                            unicode(error))
221
 
            raise AvahiGroupError("State changed: %s"
222
 
                                  % unicode(error))
223
 
    def cleanup(self):
224
 
        """Derived from the Avahi example code"""
225
 
        if self.group is not None:
226
 
            try:
227
 
                self.group.Free()
228
 
            except (dbus.exceptions.UnknownMethodException,
229
 
                    dbus.exceptions.DBusException) as e:
230
 
                pass
231
 
            self.group = None
232
 
        self.remove()
233
 
    def server_state_changed(self, state, error=None):
234
 
        """Derived from the Avahi example code"""
235
 
        logger.debug("Avahi server state change: %i", state)
236
 
        bad_states = { avahi.SERVER_INVALID:
237
 
                           "Zeroconf server invalid",
238
 
                       avahi.SERVER_REGISTERING: None,
239
 
                       avahi.SERVER_COLLISION:
240
 
                           "Zeroconf server name collision",
241
 
                       avahi.SERVER_FAILURE:
242
 
                           "Zeroconf server failure" }
243
 
        if state in bad_states:
244
 
            if bad_states[state] is not None:
245
 
                if error is None:
246
 
                    logger.error(bad_states[state])
247
 
                else:
248
 
                    logger.error(bad_states[state] + ": %r", error)
249
 
            self.cleanup()
250
 
        elif state == avahi.SERVER_RUNNING:
251
 
            self.add()
252
 
        else:
253
 
            if error is None:
254
 
                logger.debug("Unknown state: %r", state)
255
 
            else:
256
 
                logger.debug("Unknown state: %r: %r", state, error)
257
 
    def activate(self):
258
 
        """Derived from the Avahi example code"""
259
 
        if self.server is None:
260
 
            self.server = dbus.Interface(
261
 
                self.bus.get_object(avahi.DBUS_NAME,
262
 
                                    avahi.DBUS_PATH_SERVER,
263
 
                                    follow_name_owner_changes=True),
264
 
                avahi.DBUS_INTERFACE_SERVER)
265
 
        self.server.connect_to_signal("StateChanged",
266
 
                                 self.server_state_changed)
267
 
        self.server_state_changed(self.server.GetState())
268
 
 
269
 
class AvahiServiceToSyslog(AvahiService):
270
 
    def rename(self):
271
 
        """Add the new name to the syslog messages"""
272
 
        ret = AvahiService.rename(self)
273
 
        syslogger.setFormatter(logging.Formatter
274
 
                               ('Mandos (%s) [%%(process)d]:'
275
 
                                ' %%(levelname)s: %%(message)s'
276
 
                                % self.name))
277
 
        return ret
278
 
 
279
 
def _timedelta_to_milliseconds(td):
280
 
    "Convert a datetime.timedelta() to milliseconds"
281
 
    return ((td.days * 24 * 60 * 60 * 1000)
282
 
            + (td.seconds * 1000)
283
 
            + (td.microseconds // 1000))
284
 
        
285
 
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):
286
179
    """A representation of a client host served by this server.
287
 
    
288
180
    Attributes:
289
 
    _approved:   bool(); 'None' if not yet approved/disapproved
290
 
    approval_delay: datetime.timedelta(); Time to wait for approval
291
 
    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)
292
194
    checker:    subprocess.Popen(); a running checker process used
293
195
                                    to see if the client lives.
294
196
                                    'None' if no process is running.
295
 
    checker_callback_tag: a gobject event source tag, or None
296
 
    checker_command: string; External command which is run to check
297
 
                     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
298
202
                     runtime with vars(self) as dict, so that for
299
203
                     instance %(name)s can be used in the command.
300
 
    checker_initiator_tag: a gobject event source tag, or None
301
 
    created:    datetime.datetime(); (UTC) object creation
302
 
    client_structure: Object describing what attributes a client has
303
 
                      and is used for storing the client at exit
304
 
    current_checker_command: string; current running checker_command
305
 
    disable_initiator_tag: a gobject event source tag, or None
306
 
    enabled:    bool()
307
 
    fingerprint: string (40 or 32 hexadecimal digits); used to
308
 
                 uniquely identify the client
309
 
    host:       string; available for use by the checker command
310
 
    interval:   datetime.timedelta(); How often to start a new checker
311
 
    last_approval_request: datetime.datetime(); (UTC) or None
312
 
    last_checked_ok: datetime.datetime(); (UTC) or None
313
 
    last_checker_status: integer between 0 and 255 reflecting exit status
314
 
                         of last checker. -1 reflect crashed checker,
315
 
                         or None.
316
 
    last_enabled: datetime.datetime(); (UTC)
317
 
    name:       string; from the config file, used in log messages and
318
 
                        D-Bus identifiers
319
 
    secret:     bytestring; sent verbatim (over TLS) to client
320
 
    timeout:    datetime.timedelta(); How long from last_checked_ok
321
 
                                      until this client is disabled
322
 
    extended_timeout:   extra long timeout when password has been sent
323
 
    runtime_expansions: Allowed attributes for runtime expansion.
324
 
    expires:    datetime.datetime(); time (UTC) when a client will be
325
 
                disabled, or None
 
204
    use_dbus: bool(); Whether to provide D-Bus interface and signals
 
205
    dbus_object_path: dbus.ObjectPath ; only set if self.use_dbus
326
206
    """
327
 
    
328
 
    runtime_expansions = ("approval_delay", "approval_duration",
329
 
                          "created", "enabled", "fingerprint",
330
 
                          "host", "interval", "last_checked_ok",
331
 
                          "last_enabled", "name", "timeout")
332
 
    
333
207
    def timeout_milliseconds(self):
334
208
        "Return the 'timeout' attribute in milliseconds"
335
 
        return _timedelta_to_milliseconds(self.timeout)
336
 
    
337
 
    def extended_timeout_milliseconds(self):
338
 
        "Return the 'extended_timeout' attribute in milliseconds"
339
 
        return _timedelta_to_milliseconds(self.extended_timeout)
 
209
        return ((self.timeout.days * 24 * 60 * 60 * 1000)
 
210
                + (self.timeout.seconds * 1000)
 
211
                + (self.timeout.microseconds // 1000))
340
212
    
341
213
    def interval_milliseconds(self):
342
214
        "Return the 'interval' attribute in milliseconds"
343
 
        return _timedelta_to_milliseconds(self.interval)
344
 
    
345
 
    def approval_delay_milliseconds(self):
346
 
        return _timedelta_to_milliseconds(self.approval_delay)
347
 
    
348
 
    def __init__(self, name = None, config=None):
 
215
        return ((self.interval.days * 24 * 60 * 60 * 1000)
 
216
                + (self.interval.seconds * 1000)
 
217
                + (self.interval.microseconds // 1000))
 
218
    
 
219
    def __init__(self, name = None, disable_hook=None, config=None,
 
220
                 use_dbus=True):
349
221
        """Note: the 'checker' key in 'config' sets the
350
222
        'checker_command' attribute and *not* the 'checker'
351
223
        attribute."""
352
224
        self.name = name
353
225
        if config is None:
354
226
            config = {}
355
 
        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)
356
235
        # Uppercase and remove spaces from fingerprint for later
357
236
        # comparison purposes with return value from the fingerprint()
358
237
        # function
359
238
        self.fingerprint = (config["fingerprint"].upper()
360
 
                            .replace(" ", ""))
361
 
        logger.debug("  Fingerprint: %s", self.fingerprint)
 
239
                            .replace(u" ", u""))
 
240
        logger.debug(u"  Fingerprint: %s", self.fingerprint)
362
241
        if "secret" in config:
363
 
            self.secret = config["secret"].decode("base64")
 
242
            self.secret = config["secret"].decode(u"base64")
364
243
        elif "secfile" in config:
365
 
            with open(os.path.expanduser(os.path.expandvars
366
 
                                         (config["secfile"])),
367
 
                      "rb") as secfile:
 
244
            with closing(open(os.path.expanduser
 
245
                              (os.path.expandvars
 
246
                               (config["secfile"])))) as secfile:
368
247
                self.secret = secfile.read()
369
248
        else:
370
 
            raise TypeError("No secret or secfile for client %s"
 
249
            raise TypeError(u"No secret or secfile for client %s"
371
250
                            % self.name)
372
251
        self.host = config.get("host", "")
373
252
        self.created = datetime.datetime.utcnow()
374
 
        self.enabled = True
375
 
        self.last_approval_request = None
376
 
        self.last_enabled = datetime.datetime.utcnow()
 
253
        self.enabled = False
 
254
        self.last_enabled = None
377
255
        self.last_checked_ok = None
378
 
        self.last_checker_status = None
379
256
        self.timeout = string_to_delta(config["timeout"])
380
 
        self.extended_timeout = string_to_delta(config
381
 
                                                ["extended_timeout"])
382
257
        self.interval = string_to_delta(config["interval"])
 
258
        self.disable_hook = disable_hook
383
259
        self.checker = None
384
260
        self.checker_initiator_tag = None
385
261
        self.disable_initiator_tag = None
386
 
        self.expires = datetime.datetime.utcnow() + self.timeout
387
262
        self.checker_callback_tag = None
388
263
        self.checker_command = config["checker"]
389
 
        self.current_checker_command = None
390
 
        self._approved = None
391
 
        self.approved_by_default = config.get("approved_by_default",
392
 
                                              True)
393
 
        self.approvals_pending = 0
394
 
        self.approval_delay = string_to_delta(
395
 
            config["approval_delay"])
396
 
        self.approval_duration = string_to_delta(
397
 
            config["approval_duration"])
398
 
        self.changedstate = (multiprocessing_manager
399
 
                             .Condition(multiprocessing_manager
400
 
                                        .Lock()))
401
 
        self.client_structure = [attr for attr in self.__dict__.iterkeys() if not attr.startswith("_")]
402
 
        self.client_structure.append("client_structure")
403
 
 
404
 
 
405
 
        for name, t in inspect.getmembers(type(self),
406
 
                                          lambda obj: isinstance(obj, property)):
407
 
            if not name.startswith("_"):
408
 
                self.client_structure.append(name)
409
 
    
410
 
    # Send notice to process children that client state has changed
411
 
    def send_changedstate(self):
412
 
        with self.changedstate:
413
 
            self.changedstate.notify_all()
414
264
    
415
265
    def enable(self):
416
266
        """Start this client's checker and timeout hooks"""
417
 
        if getattr(self, "enabled", False):
418
 
            # Already enabled
419
 
            return
420
 
        self.send_changedstate()
421
 
        self.expires = datetime.datetime.utcnow() + self.timeout
 
267
        self.last_enabled = datetime.datetime.utcnow()
 
268
        # Schedule a new checker to be started an 'interval' from now,
 
269
        # and every interval from then on.
 
270
        self.checker_initiator_tag = (gobject.timeout_add
 
271
                                      (self.interval_milliseconds(),
 
272
                                       self.start_checker))
 
273
        # Also start a new checker *right now*.
 
274
        self.start_checker()
 
275
        # Schedule a disable() when 'timeout' has passed
 
276
        self.disable_initiator_tag = (gobject.timeout_add
 
277
                                   (self.timeout_milliseconds(),
 
278
                                    self.disable))
422
279
        self.enabled = True
423
 
        self.last_enabled = datetime.datetime.utcnow()
424
 
        self.init_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)))
425
287
    
426
 
    def disable(self, quiet=True):
 
288
    def disable(self):
427
289
        """Disable this client."""
428
290
        if not getattr(self, "enabled", False):
429
291
            return False
430
 
        if not quiet:
431
 
            self.send_changedstate()
432
 
        if not quiet:
433
 
            logger.info("Disabling client %s", self.name)
 
292
        logger.info(u"Disabling client %s", self.name)
434
293
        if getattr(self, "disable_initiator_tag", False):
435
294
            gobject.source_remove(self.disable_initiator_tag)
436
295
            self.disable_initiator_tag = None
437
 
        self.expires = None
438
296
        if getattr(self, "checker_initiator_tag", False):
439
297
            gobject.source_remove(self.checker_initiator_tag)
440
298
            self.checker_initiator_tag = None
441
299
        self.stop_checker()
 
300
        if self.disable_hook:
 
301
            self.disable_hook(self)
442
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))
443
307
        # Do not run this again if called by a gobject.timeout_add
444
308
        return False
445
309
    
446
310
    def __del__(self):
 
311
        self.disable_hook = None
447
312
        self.disable()
448
 
 
449
 
    def init_checker(self):
450
 
        # Schedule a new checker to be started an 'interval' from now,
451
 
        # and every interval from then on.
452
 
        self.checker_initiator_tag = (gobject.timeout_add
453
 
                                      (self.interval_milliseconds(),
454
 
                                       self.start_checker))
455
 
        # Schedule a disable() when 'timeout' has passed
456
 
        self.disable_initiator_tag = (gobject.timeout_add
457
 
                                   (self.timeout_milliseconds(),
458
 
                                    self.disable))
459
 
        # Also start a new checker *right now*.
460
 
        self.start_checker()
461
 
 
462
 
        
 
313
    
463
314
    def checker_callback(self, pid, condition, command):
464
315
        """The checker has completed, so take appropriate actions."""
465
316
        self.checker_callback_tag = None
466
317
        self.checker = None
467
 
        if os.WIFEXITED(condition):
468
 
            self.last_checker_status =  os.WEXITSTATUS(condition)
469
 
            if self.last_checker_status == 0:
470
 
                logger.info("Checker for %(name)s succeeded",
471
 
                            vars(self))
472
 
                self.checked_ok()
473
 
            else:
474
 
                logger.info("Checker for %(name)s failed",
475
 
                            vars(self))
476
 
        else:
477
 
            self.last_checker_status = -1
478
 
            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?",
479
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))
480
348
    
481
 
    def checked_ok(self, timeout=None):
 
349
    def bump_timeout(self):
482
350
        """Bump up the timeout for this client.
483
 
        
484
351
        This should only be called when the client has been seen,
485
352
        alive and well.
486
353
        """
487
 
        if timeout is None:
488
 
            timeout = self.timeout
489
354
        self.last_checked_ok = datetime.datetime.utcnow()
490
 
        if self.disable_initiator_tag is not None:
491
 
            gobject.source_remove(self.disable_initiator_tag)
492
 
        if getattr(self, "enabled", False):
493
 
            self.disable_initiator_tag = (gobject.timeout_add
494
 
                                          (_timedelta_to_milliseconds
495
 
                                           (timeout), self.disable))
496
 
            self.expires = datetime.datetime.utcnow() + timeout
497
 
    
498
 
    def need_approval(self):
499
 
        self.last_approval_request = datetime.datetime.utcnow()
 
355
        gobject.source_remove(self.disable_initiator_tag)
 
356
        self.disable_initiator_tag = (gobject.timeout_add
 
357
                                      (self.timeout_milliseconds(),
 
358
                                       self.disable))
 
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)))
500
365
    
501
366
    def start_checker(self):
502
367
        """Start a new checker subprocess if one is not running.
503
 
        
504
368
        If a checker already exists, leave it running and do
505
369
        nothing."""
506
370
        # The reason for not killing a running checker is that if we
509
373
        # client would inevitably timeout, since no checker would get
510
374
        # a chance to run to completion.  If we instead leave running
511
375
        # checkers alone, the checker would have to take more time
512
 
        # than 'timeout' for the client to be disabled, which is as it
513
 
        # should be.
514
 
        
515
 
        # If a checker exists, make sure it is not a zombie
516
 
        try:
517
 
            pid, status = os.waitpid(self.checker.pid, os.WNOHANG)
518
 
        except (AttributeError, OSError) as error:
519
 
            if (isinstance(error, OSError)
520
 
                and error.errno != errno.ECHILD):
521
 
                raise error
522
 
        else:
523
 
            if pid:
524
 
                logger.warning("Checker was a zombie")
525
 
                gobject.source_remove(self.checker_callback_tag)
526
 
                self.checker_callback(pid, status,
527
 
                                      self.current_checker_command)
528
 
        # Start a new checker if needed
 
376
        # than 'timeout' for the client to be declared invalid, which
 
377
        # is as it should be.
529
378
        if self.checker is None:
530
379
            try:
531
380
                # In case checker_command has exactly one % operator
532
381
                command = self.checker_command % self.host
533
382
            except TypeError:
534
383
                # Escape attributes for the shell
535
 
                escaped_attrs = dict(
536
 
                    (attr,
537
 
                     re.escape(unicode(str(getattr(self, attr, "")),
538
 
                                       errors=
539
 
                                       'replace')))
540
 
                    for attr in
541
 
                    self.runtime_expansions)
542
 
                
 
384
                escaped_attrs = dict((key, re.escape(str(val)))
 
385
                                     for key, val in
 
386
                                     vars(self).iteritems())
543
387
                try:
544
388
                    command = self.checker_command % escaped_attrs
545
 
                except TypeError as error:
546
 
                    logger.error('Could not format string "%s":'
547
 
                                 ' %s', self.checker_command, error)
 
389
                except TypeError, error:
 
390
                    logger.error(u'Could not format string "%s":'
 
391
                                 u' %s', self.checker_command, error)
548
392
                    return True # Try again later
549
 
            self.current_checker_command = command
550
393
            try:
551
 
                logger.info("Starting checker %r for %s",
 
394
                logger.info(u"Starting checker %r for %s",
552
395
                            command, self.name)
553
396
                # We don't need to redirect stdout and stderr, since
554
397
                # in normal mode, that is already done by daemon(),
557
400
                self.checker = subprocess.Popen(command,
558
401
                                                close_fds=True,
559
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))
560
409
                self.checker_callback_tag = (gobject.child_watch_add
561
410
                                             (self.checker.pid,
562
411
                                              self.checker_callback,
563
412
                                              data=command))
564
 
                # The checker may have completed before the gobject
565
 
                # watch was added.  Check for this.
566
 
                pid, status = os.waitpid(self.checker.pid, os.WNOHANG)
567
 
                if pid:
568
 
                    gobject.source_remove(self.checker_callback_tag)
569
 
                    self.checker_callback(pid, status, command)
570
 
            except OSError as error:
571
 
                logger.error("Failed to start subprocess: %s",
 
413
            except OSError, error:
 
414
                logger.error(u"Failed to start subprocess: %s",
572
415
                             error)
573
416
        # Re-run this periodically if run by gobject.timeout_add
574
417
        return True
580
423
            self.checker_callback_tag = None
581
424
        if getattr(self, "checker", None) is None:
582
425
            return
583
 
        logger.debug("Stopping checker for %(name)s", vars(self))
 
426
        logger.debug(u"Stopping checker for %(name)s", vars(self))
584
427
        try:
585
428
            os.kill(self.checker.pid, signal.SIGTERM)
586
 
            #time.sleep(0.5)
 
429
            #os.sleep(0.5)
587
430
            #if self.checker.poll() is None:
588
431
            #    os.kill(self.checker.pid, signal.SIGKILL)
589
 
        except OSError as error:
 
432
        except OSError, error:
590
433
            if error.errno != errno.ESRCH: # No such process
591
434
                raise
592
435
        self.checker = None
593
 
 
594
 
    # Encrypts a client secret and stores it in a varible encrypted_secret
595
 
    def encrypt_secret(self, key):
596
 
        # Encryption-key need to be of a specific size, so we hash inputed key
597
 
        hasheng = hashlib.sha256()
598
 
        hasheng.update(key)
599
 
        encryptionkey = hasheng.digest()
600
 
 
601
 
        # Create validation hash so we know at decryption if it was sucessful
602
 
        hasheng = hashlib.sha256()
603
 
        hasheng.update(self.secret)
604
 
        validationhash = hasheng.digest()
605
 
 
606
 
        # Encrypt secret
607
 
        iv = os.urandom(Crypto.Cipher.AES.block_size)
608
 
        ciphereng = Crypto.Cipher.AES.new(encryptionkey,
609
 
                                        Crypto.Cipher.AES.MODE_CFB, iv)
610
 
        ciphertext = ciphereng.encrypt(validationhash+self.secret)
611
 
        self.encrypted_secret = (ciphertext, iv)
612
 
 
613
 
    # Decrypt a encrypted client secret
614
 
    def decrypt_secret(self, key):
615
 
        # Decryption-key need to be of a specific size, so we hash inputed key
616
 
        hasheng = hashlib.sha256()
617
 
        hasheng.update(key)
618
 
        encryptionkey = hasheng.digest()
619
 
 
620
 
        # Decrypt encrypted secret
621
 
        ciphertext, iv = self.encrypted_secret
622
 
        ciphereng = Crypto.Cipher.AES.new(encryptionkey,
623
 
                                        Crypto.Cipher.AES.MODE_CFB, iv)
624
 
        plain = ciphereng.decrypt(ciphertext)
625
 
 
626
 
        # Validate decrypted secret to know if it was succesful
627
 
        hasheng = hashlib.sha256()
628
 
        validationhash = plain[:hasheng.digest_size]
629
 
        secret = plain[hasheng.digest_size:]
630
 
        hasheng.update(secret)
631
 
 
632
 
        # if validation fails, we use key as new secret. Otherwhise, we use
633
 
        # the decrypted secret
634
 
        if hasheng.digest() == validationhash:
635
 
            self.secret = secret
636
 
        else:
637
 
            self.secret = key
638
 
        del self.encrypted_secret
639
 
 
640
 
 
641
 
def dbus_service_property(dbus_interface, signature="v",
642
 
                          access="readwrite", byte_arrays=False):
643
 
    """Decorators for marking methods of a DBusObjectWithProperties to
644
 
    become properties on the D-Bus.
645
 
    
646
 
    The decorated method will be called with no arguments by "Get"
647
 
    and with one argument by "Set".
648
 
    
649
 
    The parameters, where they are supported, are the same as
650
 
    dbus.service.method, except there is only "signature", since the
651
 
    type from Get() and the type sent to Set() is the same.
652
 
    """
653
 
    # Encoding deeply encoded byte arrays is not supported yet by the
654
 
    # "Set" method, so we fail early here:
655
 
    if byte_arrays and signature != "ay":
656
 
        raise ValueError("Byte arrays not supported for non-'ay'"
657
 
                         " signature %r" % signature)
658
 
    def decorator(func):
659
 
        func._dbus_is_property = True
660
 
        func._dbus_interface = dbus_interface
661
 
        func._dbus_signature = signature
662
 
        func._dbus_access = access
663
 
        func._dbus_name = func.__name__
664
 
        if func._dbus_name.endswith("_dbus_property"):
665
 
            func._dbus_name = func._dbus_name[:-14]
666
 
        func._dbus_get_args_options = {'byte_arrays': byte_arrays }
667
 
        return func
668
 
    return decorator
669
 
 
670
 
 
671
 
class DBusPropertyException(dbus.exceptions.DBusException):
672
 
    """A base class for D-Bus property-related exceptions
673
 
    """
674
 
    def __unicode__(self):
675
 
        return unicode(str(self))
676
 
 
677
 
 
678
 
class DBusPropertyAccessException(DBusPropertyException):
679
 
    """A property's access permissions disallows an operation.
680
 
    """
681
 
    pass
682
 
 
683
 
 
684
 
class DBusPropertyNotFound(DBusPropertyException):
685
 
    """An attempt was made to access a non-existing property.
686
 
    """
687
 
    pass
688
 
 
689
 
 
690
 
class DBusObjectWithProperties(dbus.service.Object):
691
 
    """A D-Bus object with properties.
692
 
    
693
 
    Classes inheriting from this can use the dbus_service_property
694
 
    decorator to expose methods as D-Bus properties.  It exposes the
695
 
    standard Get(), Set(), and GetAll() methods on the D-Bus.
696
 
    """
697
 
    
698
 
    @staticmethod
699
 
    def _is_dbus_property(obj):
700
 
        return getattr(obj, "_dbus_is_property", False)
701
 
    
702
 
    def _get_all_dbus_properties(self):
703
 
        """Returns a generator of (name, attribute) pairs
704
 
        """
705
 
        return ((prop.__get__(self)._dbus_name, prop.__get__(self))
706
 
                for cls in self.__class__.__mro__
707
 
                for name, prop in
708
 
                inspect.getmembers(cls, self._is_dbus_property))
709
 
    
710
 
    def _get_dbus_property(self, interface_name, property_name):
711
 
        """Returns a bound method if one exists which is a D-Bus
712
 
        property with the specified name and interface.
713
 
        """
714
 
        for cls in  self.__class__.__mro__:
715
 
            for name, value in (inspect.getmembers
716
 
                                (cls, self._is_dbus_property)):
717
 
                if (value._dbus_name == property_name
718
 
                    and value._dbus_interface == interface_name):
719
 
                    return value.__get__(self)
720
 
        
721
 
        # No such property
722
 
        raise DBusPropertyNotFound(self.dbus_object_path + ":"
723
 
                                   + interface_name + "."
724
 
                                   + property_name)
725
 
    
726
 
    @dbus.service.method(dbus.PROPERTIES_IFACE, in_signature="ss",
727
 
                         out_signature="v")
728
 
    def Get(self, interface_name, property_name):
729
 
        """Standard D-Bus property Get() method, see D-Bus standard.
730
 
        """
731
 
        prop = self._get_dbus_property(interface_name, property_name)
732
 
        if prop._dbus_access == "write":
733
 
            raise DBusPropertyAccessException(property_name)
734
 
        value = prop()
735
 
        if not hasattr(value, "variant_level"):
736
 
            return value
737
 
        return type(value)(value, variant_level=value.variant_level+1)
738
 
    
739
 
    @dbus.service.method(dbus.PROPERTIES_IFACE, in_signature="ssv")
740
 
    def Set(self, interface_name, property_name, value):
741
 
        """Standard D-Bus property Set() method, see D-Bus standard.
742
 
        """
743
 
        prop = self._get_dbus_property(interface_name, property_name)
744
 
        if prop._dbus_access == "read":
745
 
            raise DBusPropertyAccessException(property_name)
746
 
        if prop._dbus_get_args_options["byte_arrays"]:
747
 
            # The byte_arrays option is not supported yet on
748
 
            # signatures other than "ay".
749
 
            if prop._dbus_signature != "ay":
750
 
                raise ValueError
751
 
            value = dbus.ByteArray(''.join(unichr(byte)
752
 
                                           for byte in value))
753
 
        prop(value)
754
 
    
755
 
    @dbus.service.method(dbus.PROPERTIES_IFACE, in_signature="s",
756
 
                         out_signature="a{sv}")
757
 
    def GetAll(self, interface_name):
758
 
        """Standard D-Bus property GetAll() method, see D-Bus
759
 
        standard.
760
 
        
761
 
        Note: Will not include properties with access="write".
762
 
        """
763
 
        all = {}
764
 
        for name, prop in self._get_all_dbus_properties():
765
 
            if (interface_name
766
 
                and interface_name != prop._dbus_interface):
767
 
                # Interface non-empty but did not match
768
 
                continue
769
 
            # Ignore write-only properties
770
 
            if prop._dbus_access == "write":
771
 
                continue
772
 
            value = prop()
773
 
            if not hasattr(value, "variant_level"):
774
 
                all[name] = value
775
 
                continue
776
 
            all[name] = type(value)(value, variant_level=
777
 
                                    value.variant_level+1)
778
 
        return dbus.Dictionary(all, signature="sv")
779
 
    
780
 
    @dbus.service.method(dbus.INTROSPECTABLE_IFACE,
781
 
                         out_signature="s",
782
 
                         path_keyword='object_path',
783
 
                         connection_keyword='connection')
784
 
    def Introspect(self, object_path, connection):
785
 
        """Standard D-Bus method, overloaded to insert property tags.
786
 
        """
787
 
        xmlstring = dbus.service.Object.Introspect(self, object_path,
788
 
                                                   connection)
789
 
        try:
790
 
            document = xml.dom.minidom.parseString(xmlstring)
791
 
            def make_tag(document, name, prop):
792
 
                e = document.createElement("property")
793
 
                e.setAttribute("name", name)
794
 
                e.setAttribute("type", prop._dbus_signature)
795
 
                e.setAttribute("access", prop._dbus_access)
796
 
                return e
797
 
            for if_tag in document.getElementsByTagName("interface"):
798
 
                for tag in (make_tag(document, name, prop)
799
 
                            for name, prop
800
 
                            in self._get_all_dbus_properties()
801
 
                            if prop._dbus_interface
802
 
                            == if_tag.getAttribute("name")):
803
 
                    if_tag.appendChild(tag)
804
 
                # Add the names to the return values for the
805
 
                # "org.freedesktop.DBus.Properties" methods
806
 
                if (if_tag.getAttribute("name")
807
 
                    == "org.freedesktop.DBus.Properties"):
808
 
                    for cn in if_tag.getElementsByTagName("method"):
809
 
                        if cn.getAttribute("name") == "Get":
810
 
                            for arg in cn.getElementsByTagName("arg"):
811
 
                                if (arg.getAttribute("direction")
812
 
                                    == "out"):
813
 
                                    arg.setAttribute("name", "value")
814
 
                        elif cn.getAttribute("name") == "GetAll":
815
 
                            for arg in cn.getElementsByTagName("arg"):
816
 
                                if (arg.getAttribute("direction")
817
 
                                    == "out"):
818
 
                                    arg.setAttribute("name", "props")
819
 
            xmlstring = document.toxml("utf-8")
820
 
            document.unlink()
821
 
        except (AttributeError, xml.dom.DOMException,
822
 
                xml.parsers.expat.ExpatError) as error:
823
 
            logger.error("Failed to override Introspection method",
824
 
                         error)
825
 
        return xmlstring
826
 
 
827
 
 
828
 
def datetime_to_dbus (dt, variant_level=0):
829
 
    """Convert a UTC datetime.datetime() to a D-Bus type."""
830
 
    if dt is None:
831
 
        return dbus.String("", variant_level = variant_level)
832
 
    return dbus.String(dt.isoformat(),
833
 
                       variant_level=variant_level)
834
 
 
835
 
class AlternateDBusNamesMetaclass(DBusObjectWithProperties
836
 
                                  .__metaclass__):
837
 
    """Applied to an empty subclass of a D-Bus object, this metaclass
838
 
    will add additional D-Bus attributes matching a certain pattern.
839
 
    """
840
 
    def __new__(mcs, name, bases, attr):
841
 
        # Go through all the base classes which could have D-Bus
842
 
        # methods, signals, or properties in them
843
 
        for base in (b for b in bases
844
 
                     if issubclass(b, dbus.service.Object)):
845
 
            # Go though all attributes of the base class
846
 
            for attrname, attribute in inspect.getmembers(base):
847
 
                # Ignore non-D-Bus attributes, and D-Bus attributes
848
 
                # with the wrong interface name
849
 
                if (not hasattr(attribute, "_dbus_interface")
850
 
                    or not attribute._dbus_interface
851
 
                    .startswith("se.recompile.Mandos")):
852
 
                    continue
853
 
                # Create an alternate D-Bus interface name based on
854
 
                # the current name
855
 
                alt_interface = (attribute._dbus_interface
856
 
                                 .replace("se.recompile.Mandos",
857
 
                                          "se.bsnet.fukt.Mandos"))
858
 
                # Is this a D-Bus signal?
859
 
                if getattr(attribute, "_dbus_is_signal", False):
860
 
                    # Extract the original non-method function by
861
 
                    # black magic
862
 
                    nonmethod_func = (dict(
863
 
                            zip(attribute.func_code.co_freevars,
864
 
                                attribute.__closure__))["func"]
865
 
                                      .cell_contents)
866
 
                    # Create a new, but exactly alike, function
867
 
                    # object, and decorate it to be a new D-Bus signal
868
 
                    # with the alternate D-Bus interface name
869
 
                    new_function = (dbus.service.signal
870
 
                                    (alt_interface,
871
 
                                     attribute._dbus_signature)
872
 
                                    (types.FunctionType(
873
 
                                nonmethod_func.func_code,
874
 
                                nonmethod_func.func_globals,
875
 
                                nonmethod_func.func_name,
876
 
                                nonmethod_func.func_defaults,
877
 
                                nonmethod_func.func_closure)))
878
 
                    # Define a creator of a function to call both the
879
 
                    # old and new functions, so both the old and new
880
 
                    # signals gets sent when the function is called
881
 
                    def fixscope(func1, func2):
882
 
                        """This function is a scope container to pass
883
 
                        func1 and func2 to the "call_both" function
884
 
                        outside of its arguments"""
885
 
                        def call_both(*args, **kwargs):
886
 
                            """This function will emit two D-Bus
887
 
                            signals by calling func1 and func2"""
888
 
                            func1(*args, **kwargs)
889
 
                            func2(*args, **kwargs)
890
 
                        return call_both
891
 
                    # Create the "call_both" function and add it to
892
 
                    # the class
893
 
                    attr[attrname] = fixscope(attribute,
894
 
                                              new_function)
895
 
                # Is this a D-Bus method?
896
 
                elif getattr(attribute, "_dbus_is_method", False):
897
 
                    # Create a new, but exactly alike, function
898
 
                    # object.  Decorate it to be a new D-Bus method
899
 
                    # with the alternate D-Bus interface name.  Add it
900
 
                    # to the class.
901
 
                    attr[attrname] = (dbus.service.method
902
 
                                      (alt_interface,
903
 
                                       attribute._dbus_in_signature,
904
 
                                       attribute._dbus_out_signature)
905
 
                                      (types.FunctionType
906
 
                                       (attribute.func_code,
907
 
                                        attribute.func_globals,
908
 
                                        attribute.func_name,
909
 
                                        attribute.func_defaults,
910
 
                                        attribute.func_closure)))
911
 
                # Is this a D-Bus property?
912
 
                elif getattr(attribute, "_dbus_is_property", False):
913
 
                    # Create a new, but exactly alike, function
914
 
                    # object, and decorate it to be a new D-Bus
915
 
                    # property with the alternate D-Bus interface
916
 
                    # name.  Add it to the class.
917
 
                    attr[attrname] = (dbus_service_property
918
 
                                      (alt_interface,
919
 
                                       attribute._dbus_signature,
920
 
                                       attribute._dbus_access,
921
 
                                       attribute
922
 
                                       ._dbus_get_args_options
923
 
                                       ["byte_arrays"])
924
 
                                      (types.FunctionType
925
 
                                       (attribute.func_code,
926
 
                                        attribute.func_globals,
927
 
                                        attribute.func_name,
928
 
                                        attribute.func_defaults,
929
 
                                        attribute.func_closure)))
930
 
        return type.__new__(mcs, name, bases, attr)
931
 
 
932
 
class ClientDBus(Client, DBusObjectWithProperties):
933
 
    """A Client class using D-Bus
934
 
    
935
 
    Attributes:
936
 
    dbus_object_path: dbus.ObjectPath
937
 
    bus: dbus.SystemBus()
938
 
    """
939
 
    
940
 
    runtime_expansions = (Client.runtime_expansions
941
 
                          + ("dbus_object_path",))
942
 
    
943
 
    # dbus.service.Object doesn't use super(), so we can't either.
944
 
    
945
 
    def __init__(self, bus = None, *args, **kwargs):
946
 
        self.bus = bus
947
 
        Client.__init__(self, *args, **kwargs)
948
 
 
949
 
        self._approvals_pending = 0
950
 
        # Only now, when this client is initialized, can it show up on
951
 
        # the D-Bus
952
 
        client_object_name = unicode(self.name).translate(
953
 
            {ord("."): ord("_"),
954
 
             ord("-"): ord("_")})
955
 
        self.dbus_object_path = (dbus.ObjectPath
956
 
                                 ("/clients/" + client_object_name))
957
 
        DBusObjectWithProperties.__init__(self, self.bus,
958
 
                                          self.dbus_object_path)
959
 
        
960
 
    def notifychangeproperty(transform_func,
961
 
                             dbus_name, type_func=lambda x: x,
962
 
                             variant_level=1):
963
 
        """ Modify a variable so that it's a property which announces
964
 
        its changes to DBus.
965
 
 
966
 
        transform_fun: Function that takes a value and a variant_level
967
 
                       and transforms it to a D-Bus type.
968
 
        dbus_name: D-Bus name of the variable
969
 
        type_func: Function that transform the value before sending it
970
 
                   to the D-Bus.  Default: no transform
971
 
        variant_level: D-Bus variant level.  Default: 1
972
 
        """
973
 
        attrname = "_{0}".format(dbus_name)
974
 
        def setter(self, value):
975
 
            if hasattr(self, "dbus_object_path"):
976
 
                if (not hasattr(self, attrname) or
977
 
                    type_func(getattr(self, attrname, None))
978
 
                    != type_func(value)):
979
 
                    dbus_value = transform_func(type_func(value),
980
 
                                                variant_level
981
 
                                                =variant_level)
982
 
                    self.PropertyChanged(dbus.String(dbus_name),
983
 
                                         dbus_value)
984
 
            setattr(self, attrname, value)
985
 
        
986
 
        return property(lambda self: getattr(self, attrname), setter)
987
 
    
988
 
    
989
 
    expires = notifychangeproperty(datetime_to_dbus, "Expires")
990
 
    approvals_pending = notifychangeproperty(dbus.Boolean,
991
 
                                             "ApprovalPending",
992
 
                                             type_func = bool)
993
 
    enabled = notifychangeproperty(dbus.Boolean, "Enabled")
994
 
    last_enabled = notifychangeproperty(datetime_to_dbus,
995
 
                                        "LastEnabled")
996
 
    checker = notifychangeproperty(dbus.Boolean, "CheckerRunning",
997
 
                                   type_func = lambda checker:
998
 
                                       checker is not None)
999
 
    last_checked_ok = notifychangeproperty(datetime_to_dbus,
1000
 
                                           "LastCheckedOK")
1001
 
    last_approval_request = notifychangeproperty(
1002
 
        datetime_to_dbus, "LastApprovalRequest")
1003
 
    approved_by_default = notifychangeproperty(dbus.Boolean,
1004
 
                                               "ApprovedByDefault")
1005
 
    approval_delay = notifychangeproperty(dbus.UInt16,
1006
 
                                          "ApprovalDelay",
1007
 
                                          type_func =
1008
 
                                          _timedelta_to_milliseconds)
1009
 
    approval_duration = notifychangeproperty(
1010
 
        dbus.UInt16, "ApprovalDuration",
1011
 
        type_func = _timedelta_to_milliseconds)
1012
 
    host = notifychangeproperty(dbus.String, "Host")
1013
 
    timeout = notifychangeproperty(dbus.UInt16, "Timeout",
1014
 
                                   type_func =
1015
 
                                   _timedelta_to_milliseconds)
1016
 
    extended_timeout = notifychangeproperty(
1017
 
        dbus.UInt16, "ExtendedTimeout",
1018
 
        type_func = _timedelta_to_milliseconds)
1019
 
    interval = notifychangeproperty(dbus.UInt16,
1020
 
                                    "Interval",
1021
 
                                    type_func =
1022
 
                                    _timedelta_to_milliseconds)
1023
 
    checker_command = notifychangeproperty(dbus.String, "Checker")
1024
 
    
1025
 
    del notifychangeproperty
1026
 
    
1027
 
    def __del__(self, *args, **kwargs):
1028
 
        try:
1029
 
            self.remove_from_connection()
1030
 
        except LookupError:
1031
 
            pass
1032
 
        if hasattr(DBusObjectWithProperties, "__del__"):
1033
 
            DBusObjectWithProperties.__del__(self, *args, **kwargs)
1034
 
        Client.__del__(self, *args, **kwargs)
1035
 
    
1036
 
    def checker_callback(self, pid, condition, command,
1037
 
                         *args, **kwargs):
1038
 
        self.checker_callback_tag = None
1039
 
        self.checker = None
1040
 
        if os.WIFEXITED(condition):
1041
 
            exitstatus = os.WEXITSTATUS(condition)
1042
 
            # Emit D-Bus signal
1043
 
            self.CheckerCompleted(dbus.Int16(exitstatus),
1044
 
                                  dbus.Int64(condition),
1045
 
                                  dbus.String(command))
1046
 
        else:
1047
 
            # Emit D-Bus signal
1048
 
            self.CheckerCompleted(dbus.Int16(-1),
1049
 
                                  dbus.Int64(condition),
1050
 
                                  dbus.String(command))
1051
 
        
1052
 
        return Client.checker_callback(self, pid, condition, command,
1053
 
                                       *args, **kwargs)
1054
 
    
1055
 
    def start_checker(self, *args, **kwargs):
1056
 
        old_checker = self.checker
1057
 
        if self.checker is not None:
1058
 
            old_checker_pid = self.checker.pid
1059
 
        else:
1060
 
            old_checker_pid = None
1061
 
        r = Client.start_checker(self, *args, **kwargs)
1062
 
        # Only if new checker process was started
1063
 
        if (self.checker is not None
1064
 
            and old_checker_pid != self.checker.pid):
1065
 
            # Emit D-Bus signal
1066
 
            self.CheckerStarted(self.current_checker_command)
1067
 
        return r
1068
 
    
1069
 
    def _reset_approved(self):
1070
 
        self._approved = None
1071
 
        return False
1072
 
    
1073
 
    def approve(self, value=True):
1074
 
        self.send_changedstate()
1075
 
        self._approved = value
1076
 
        gobject.timeout_add(_timedelta_to_milliseconds
1077
 
                            (self.approval_duration),
1078
 
                            self._reset_approved)
1079
 
    
1080
 
    
1081
 
    ## D-Bus methods, signals & properties
1082
 
    _interface = "se.recompile.Mandos.Client"
1083
 
    
1084
 
    ## 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"
1085
456
    
1086
457
    # CheckerCompleted - signal
1087
 
    @dbus.service.signal(_interface, signature="nxs")
1088
 
    def CheckerCompleted(self, exitcode, waitstatus, command):
 
458
    @dbus.service.signal(_interface, signature="bqs")
 
459
    def CheckerCompleted(self, success, condition, command):
1089
460
        "D-Bus signal"
1090
461
        pass
1091
462
    
1095
466
        "D-Bus signal"
1096
467
        pass
1097
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
    
1098
513
    # PropertyChanged - signal
1099
514
    @dbus.service.signal(_interface, signature="sv")
1100
515
    def PropertyChanged(self, property, value):
1101
516
        "D-Bus signal"
1102
517
        pass
1103
518
    
1104
 
    # GotSecret - signal
1105
 
    @dbus.service.signal(_interface)
1106
 
    def GotSecret(self):
1107
 
        """D-Bus signal
1108
 
        Is sent after a successful transfer of secret from the Mandos
1109
 
        server to mandos-client
1110
 
        """
1111
 
        pass
1112
 
    
1113
 
    # Rejected - signal
1114
 
    @dbus.service.signal(_interface, signature="s")
1115
 
    def Rejected(self, reason):
1116
 
        "D-Bus signal"
1117
 
        pass
1118
 
    
1119
 
    # NeedApproval - signal
1120
 
    @dbus.service.signal(_interface, signature="tb")
1121
 
    def NeedApproval(self, timeout, default):
1122
 
        "D-Bus signal"
1123
 
        return self.need_approval()
1124
 
    
1125
 
    ## Methods
1126
 
    
1127
 
    # Approve - method
1128
 
    @dbus.service.method(_interface, in_signature="b")
1129
 
    def Approve(self, value):
1130
 
        self.approve(value)
1131
 
    
1132
 
    # CheckedOK - method
1133
 
    @dbus.service.method(_interface)
1134
 
    def CheckedOK(self):
1135
 
        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)))
1136
562
    
1137
563
    # Enable - method
1138
 
    @dbus.service.method(_interface)
1139
 
    def Enable(self):
1140
 
        "D-Bus method"
1141
 
        self.enable()
 
564
    Enable = dbus.service.method(_interface)(enable)
 
565
    Enable.__name__ = "Enable"
1142
566
    
1143
567
    # StartChecker - method
1144
568
    @dbus.service.method(_interface)
1153
577
        self.disable()
1154
578
    
1155
579
    # StopChecker - method
1156
 
    @dbus.service.method(_interface)
1157
 
    def StopChecker(self):
1158
 
        self.stop_checker()
1159
 
    
1160
 
    ## Properties
1161
 
    
1162
 
    # ApprovalPending - property
1163
 
    @dbus_service_property(_interface, signature="b", access="read")
1164
 
    def ApprovalPending_dbus_property(self):
1165
 
        return dbus.Boolean(bool(self.approvals_pending))
1166
 
    
1167
 
    # ApprovedByDefault - property
1168
 
    @dbus_service_property(_interface, signature="b",
1169
 
                           access="readwrite")
1170
 
    def ApprovedByDefault_dbus_property(self, value=None):
1171
 
        if value is None:       # get
1172
 
            return dbus.Boolean(self.approved_by_default)
1173
 
        self.approved_by_default = bool(value)
1174
 
    
1175
 
    # ApprovalDelay - property
1176
 
    @dbus_service_property(_interface, signature="t",
1177
 
                           access="readwrite")
1178
 
    def ApprovalDelay_dbus_property(self, value=None):
1179
 
        if value is None:       # get
1180
 
            return dbus.UInt64(self.approval_delay_milliseconds())
1181
 
        self.approval_delay = datetime.timedelta(0, 0, 0, value)
1182
 
    
1183
 
    # ApprovalDuration - property
1184
 
    @dbus_service_property(_interface, signature="t",
1185
 
                           access="readwrite")
1186
 
    def ApprovalDuration_dbus_property(self, value=None):
1187
 
        if value is None:       # get
1188
 
            return dbus.UInt64(_timedelta_to_milliseconds(
1189
 
                    self.approval_duration))
1190
 
        self.approval_duration = datetime.timedelta(0, 0, 0, value)
1191
 
    
1192
 
    # Name - property
1193
 
    @dbus_service_property(_interface, signature="s", access="read")
1194
 
    def Name_dbus_property(self):
1195
 
        return dbus.String(self.name)
1196
 
    
1197
 
    # Fingerprint - property
1198
 
    @dbus_service_property(_interface, signature="s", access="read")
1199
 
    def Fingerprint_dbus_property(self):
1200
 
        return dbus.String(self.fingerprint)
1201
 
    
1202
 
    # Host - property
1203
 
    @dbus_service_property(_interface, signature="s",
1204
 
                           access="readwrite")
1205
 
    def Host_dbus_property(self, value=None):
1206
 
        if value is None:       # get
1207
 
            return dbus.String(self.host)
1208
 
        self.host = value
1209
 
    
1210
 
    # Created - property
1211
 
    @dbus_service_property(_interface, signature="s", access="read")
1212
 
    def Created_dbus_property(self):
1213
 
        return dbus.String(datetime_to_dbus(self.created))
1214
 
    
1215
 
    # LastEnabled - property
1216
 
    @dbus_service_property(_interface, signature="s", access="read")
1217
 
    def LastEnabled_dbus_property(self):
1218
 
        return datetime_to_dbus(self.last_enabled)
1219
 
    
1220
 
    # Enabled - property
1221
 
    @dbus_service_property(_interface, signature="b",
1222
 
                           access="readwrite")
1223
 
    def Enabled_dbus_property(self, value=None):
1224
 
        if value is None:       # get
1225
 
            return dbus.Boolean(self.enabled)
1226
 
        if value:
1227
 
            self.enable()
1228
 
        else:
1229
 
            self.disable()
1230
 
    
1231
 
    # LastCheckedOK - property
1232
 
    @dbus_service_property(_interface, signature="s",
1233
 
                           access="readwrite")
1234
 
    def LastCheckedOK_dbus_property(self, value=None):
1235
 
        if value is not None:
1236
 
            self.checked_ok()
1237
 
            return
1238
 
        return datetime_to_dbus(self.last_checked_ok)
1239
 
    
1240
 
    # Expires - property
1241
 
    @dbus_service_property(_interface, signature="s", access="read")
1242
 
    def Expires_dbus_property(self):
1243
 
        return datetime_to_dbus(self.expires)
1244
 
    
1245
 
    # LastApprovalRequest - property
1246
 
    @dbus_service_property(_interface, signature="s", access="read")
1247
 
    def LastApprovalRequest_dbus_property(self):
1248
 
        return datetime_to_dbus(self.last_approval_request)
1249
 
    
1250
 
    # Timeout - property
1251
 
    @dbus_service_property(_interface, signature="t",
1252
 
                           access="readwrite")
1253
 
    def Timeout_dbus_property(self, value=None):
1254
 
        if value is None:       # get
1255
 
            return dbus.UInt64(self.timeout_milliseconds())
1256
 
        self.timeout = datetime.timedelta(0, 0, 0, value)
1257
 
        if getattr(self, "disable_initiator_tag", None) is None:
1258
 
            return
1259
 
        # Reschedule timeout
1260
 
        gobject.source_remove(self.disable_initiator_tag)
1261
 
        self.disable_initiator_tag = None
1262
 
        self.expires = None
1263
 
        time_to_die = _timedelta_to_milliseconds((self
1264
 
                                                  .last_checked_ok
1265
 
                                                  + self.timeout)
1266
 
                                                 - datetime.datetime
1267
 
                                                 .utcnow())
1268
 
        if time_to_die <= 0:
1269
 
            # The timeout has passed
1270
 
            self.disable()
1271
 
        else:
1272
 
            self.expires = (datetime.datetime.utcnow()
1273
 
                            + datetime.timedelta(milliseconds =
1274
 
                                                 time_to_die))
1275
 
            self.disable_initiator_tag = (gobject.timeout_add
1276
 
                                          (time_to_die, self.disable))
1277
 
    
1278
 
    # ExtendedTimeout - property
1279
 
    @dbus_service_property(_interface, signature="t",
1280
 
                           access="readwrite")
1281
 
    def ExtendedTimeout_dbus_property(self, value=None):
1282
 
        if value is None:       # get
1283
 
            return dbus.UInt64(self.extended_timeout_milliseconds())
1284
 
        self.extended_timeout = datetime.timedelta(0, 0, 0, value)
1285
 
    
1286
 
    # Interval - property
1287
 
    @dbus_service_property(_interface, signature="t",
1288
 
                           access="readwrite")
1289
 
    def Interval_dbus_property(self, value=None):
1290
 
        if value is None:       # get
1291
 
            return dbus.UInt64(self.interval_milliseconds())
1292
 
        self.interval = datetime.timedelta(0, 0, 0, value)
1293
 
        if getattr(self, "checker_initiator_tag", None) is None:
1294
 
            return
1295
 
        # Reschedule checker run
1296
 
        gobject.source_remove(self.checker_initiator_tag)
1297
 
        self.checker_initiator_tag = (gobject.timeout_add
1298
 
                                      (value, self.start_checker))
1299
 
        self.start_checker()    # Start one now, too
1300
 
    
1301
 
    # Checker - property
1302
 
    @dbus_service_property(_interface, signature="s",
1303
 
                           access="readwrite")
1304
 
    def Checker_dbus_property(self, value=None):
1305
 
        if value is None:       # get
1306
 
            return dbus.String(self.checker_command)
1307
 
        self.checker_command = value
1308
 
    
1309
 
    # CheckerRunning - property
1310
 
    @dbus_service_property(_interface, signature="b",
1311
 
                           access="readwrite")
1312
 
    def CheckerRunning_dbus_property(self, value=None):
1313
 
        if value is None:       # get
1314
 
            return dbus.Boolean(self.checker is not None)
1315
 
        if value:
1316
 
            self.start_checker()
1317
 
        else:
1318
 
            self.stop_checker()
1319
 
    
1320
 
    # ObjectPath - property
1321
 
    @dbus_service_property(_interface, signature="o", access="read")
1322
 
    def ObjectPath_dbus_property(self):
1323
 
        return self.dbus_object_path # is already a dbus.ObjectPath
1324
 
    
1325
 
    # Secret = property
1326
 
    @dbus_service_property(_interface, signature="ay",
1327
 
                           access="write", byte_arrays=True)
1328
 
    def Secret_dbus_property(self, value):
1329
 
        self.secret = str(value)
 
580
    StopChecker = dbus.service.method(_interface)(stop_checker)
 
581
    StopChecker.__name__ = "StopChecker"
1330
582
    
1331
583
    del _interface
1332
584
 
1333
585
 
1334
 
class ProxyClient(object):
1335
 
    def __init__(self, child_pipe, fpr, address):
1336
 
        self._pipe = child_pipe
1337
 
        self._pipe.send(('init', fpr, address))
1338
 
        if not self._pipe.recv():
1339
 
            raise KeyError()
1340
 
    
1341
 
    def __getattribute__(self, name):
1342
 
        if(name == '_pipe'):
1343
 
            return super(ProxyClient, self).__getattribute__(name)
1344
 
        self._pipe.send(('getattr', name))
1345
 
        data = self._pipe.recv()
1346
 
        if data[0] == 'data':
1347
 
            return data[1]
1348
 
        if data[0] == 'function':
1349
 
            def func(*args, **kwargs):
1350
 
                self._pipe.send(('funcall', name, args, kwargs))
1351
 
                return self._pipe.recv()[1]
1352
 
            return func
1353
 
    
1354
 
    def __setattr__(self, name, value):
1355
 
        if(name == '_pipe'):
1356
 
            return super(ProxyClient, self).__setattr__(name, value)
1357
 
        self._pipe.send(('setattr', name, value))
1358
 
 
1359
 
class ClientDBusTransitional(ClientDBus):
1360
 
    __metaclass__ = AlternateDBusNamesMetaclass
1361
 
 
1362
 
class ClientHandler(socketserver.BaseRequestHandler, object):
1363
 
    """A class to handle client connections.
1364
 
    
1365
 
    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.
1366
647
    Note: This will run in its own forked process."""
1367
648
    
1368
649
    def handle(self):
1369
 
        with contextlib.closing(self.server.child_pipe) as child_pipe:
1370
 
            logger.info("TCP connection from: %s",
1371
 
                        unicode(self.client_address))
1372
 
            logger.debug("Pipe FD: %d",
1373
 
                         self.server.child_pipe.fileno())
1374
 
            
1375
 
            session = (gnutls.connection
1376
 
                       .ClientSession(self.request,
1377
 
                                      gnutls.connection
1378
 
                                      .X509Credentials()))
1379
 
            
1380
 
            # Note: gnutls.connection.X509Credentials is really a
1381
 
            # generic GnuTLS certificate credentials object so long as
1382
 
            # no X.509 keys are added to it.  Therefore, we can use it
1383
 
            # here despite using OpenPGP certificates.
1384
 
            
1385
 
            #priority = ':'.join(("NONE", "+VERS-TLS1.1",
1386
 
            #                      "+AES-256-CBC", "+SHA1",
1387
 
            #                      "+COMP-NULL", "+CTYPE-OPENPGP",
1388
 
            #                      "+DHE-DSS"))
1389
 
            # Use a fallback default, since this MUST be set.
1390
 
            priority = self.server.gnutls_priority
1391
 
            if priority is None:
1392
 
                priority = "NORMAL"
1393
 
            (gnutls.library.functions
1394
 
             .gnutls_priority_set_direct(session._c_object,
1395
 
                                         priority, None))
1396
 
            
1397
 
            # Start communication using the Mandos protocol
1398
 
            # Get protocol number
1399
 
            line = self.request.makefile().readline()
1400
 
            logger.debug("Protocol version: %r", line)
1401
 
            try:
1402
 
                if int(line.strip().split()[0]) > 1:
1403
 
                    raise RuntimeError
1404
 
            except (ValueError, IndexError, RuntimeError) as error:
1405
 
                logger.error("Unknown protocol version: %s", error)
1406
 
                return
1407
 
            
1408
 
            # Start GnuTLS connection
1409
 
            try:
1410
 
                session.handshake()
1411
 
            except gnutls.errors.GNUTLSError as error:
1412
 
                logger.warning("Handshake failed: %s", error)
1413
 
                # Do not run session.bye() here: the session is not
1414
 
                # established.  Just abandon the request.
1415
 
                return
1416
 
            logger.debug("Handshake succeeded")
1417
 
            
1418
 
            approval_required = False
1419
 
            try:
1420
 
                try:
1421
 
                    fpr = self.fingerprint(self.peer_certificate
1422
 
                                           (session))
1423
 
                except (TypeError,
1424
 
                        gnutls.errors.GNUTLSError) as error:
1425
 
                    logger.warning("Bad certificate: %s", error)
1426
 
                    return
1427
 
                logger.debug("Fingerprint: %s", fpr)
1428
 
                
1429
 
                try:
1430
 
                    client = ProxyClient(child_pipe, fpr,
1431
 
                                         self.client_address)
1432
 
                except KeyError:
1433
 
                    return
1434
 
                
1435
 
                if client.approval_delay:
1436
 
                    delay = client.approval_delay
1437
 
                    client.approvals_pending += 1
1438
 
                    approval_required = True
1439
 
                
1440
 
                while True:
1441
 
                    if not client.enabled:
1442
 
                        logger.info("Client %s is disabled",
1443
 
                                       client.name)
1444
 
                        if self.server.use_dbus:
1445
 
                            # Emit D-Bus signal
1446
 
                            client.Rejected("Disabled")
1447
 
                        return
1448
 
                    
1449
 
                    if client._approved or not client.approval_delay:
1450
 
                        #We are approved or approval is disabled
1451
 
                        break
1452
 
                    elif client._approved is None:
1453
 
                        logger.info("Client %s needs approval",
1454
 
                                    client.name)
1455
 
                        if self.server.use_dbus:
1456
 
                            # Emit D-Bus signal
1457
 
                            client.NeedApproval(
1458
 
                                client.approval_delay_milliseconds(),
1459
 
                                client.approved_by_default)
1460
 
                    else:
1461
 
                        logger.warning("Client %s was not approved",
1462
 
                                       client.name)
1463
 
                        if self.server.use_dbus:
1464
 
                            # Emit D-Bus signal
1465
 
                            client.Rejected("Denied")
1466
 
                        return
1467
 
                    
1468
 
                    #wait until timeout or approved
1469
 
                    time = datetime.datetime.now()
1470
 
                    client.changedstate.acquire()
1471
 
                    (client.changedstate.wait
1472
 
                     (float(client._timedelta_to_milliseconds(delay)
1473
 
                            / 1000)))
1474
 
                    client.changedstate.release()
1475
 
                    time2 = datetime.datetime.now()
1476
 
                    if (time2 - time) >= delay:
1477
 
                        if not client.approved_by_default:
1478
 
                            logger.warning("Client %s timed out while"
1479
 
                                           " waiting for approval",
1480
 
                                           client.name)
1481
 
                            if self.server.use_dbus:
1482
 
                                # Emit D-Bus signal
1483
 
                                client.Rejected("Approval timed out")
1484
 
                            return
1485
 
                        else:
1486
 
                            break
1487
 
                    else:
1488
 
                        delay -= time2 - time
1489
 
                
1490
 
                sent_size = 0
1491
 
                while sent_size < len(client.secret):
1492
 
                    try:
1493
 
                        sent = session.send(client.secret[sent_size:])
1494
 
                    except gnutls.errors.GNUTLSError as error:
1495
 
                        logger.warning("gnutls send failed")
1496
 
                        return
1497
 
                    logger.debug("Sent: %d, remaining: %d",
1498
 
                                 sent, len(client.secret)
1499
 
                                 - (sent_size + sent))
1500
 
                    sent_size += sent
1501
 
                
1502
 
                logger.info("Sending secret to %s", client.name)
1503
 
                # bump the timeout using extended_timeout
1504
 
                client.checked_ok(client.extended_timeout)
1505
 
                if self.server.use_dbus:
1506
 
                    # Emit D-Bus signal
1507
 
                    client.GotSecret()
1508
 
            
1509
 
            finally:
1510
 
                if approval_required:
1511
 
                    client.approvals_pending -= 1
1512
 
                try:
1513
 
                    session.bye()
1514
 
                except gnutls.errors.GNUTLSError as error:
1515
 
                    logger.warning("GnuTLS bye failed")
1516
 
    
1517
 
    @staticmethod
1518
 
    def peer_certificate(session):
1519
 
        "Return the peer's OpenPGP certificate as a bytestring"
1520
 
        # If not an OpenPGP certificate...
1521
 
        if (gnutls.library.functions
1522
 
            .gnutls_certificate_type_get(session._c_object)
1523
 
            != gnutls.library.constants.GNUTLS_CRT_OPENPGP):
1524
 
            # ...do the normal thing
1525
 
            return session.peer_certificate
1526
 
        list_size = ctypes.c_uint(1)
1527
 
        cert_list = (gnutls.library.functions
1528
 
                     .gnutls_certificate_get_peers
1529
 
                     (session._c_object, ctypes.byref(list_size)))
1530
 
        if not bool(cert_list) and list_size.value != 0:
1531
 
            raise gnutls.errors.GNUTLSError("error getting peer"
1532
 
                                            " certificate")
1533
 
        if list_size.value == 0:
1534
 
            return None
1535
 
        cert = cert_list[0]
1536
 
        return ctypes.string_at(cert.data, cert.size)
1537
 
    
1538
 
    @staticmethod
1539
 
    def fingerprint(openpgp):
1540
 
        "Convert an OpenPGP bytestring to a hexdigit fingerprint"
1541
 
        # New GnuTLS "datum" with the OpenPGP public key
1542
 
        datum = (gnutls.library.types
1543
 
                 .gnutls_datum_t(ctypes.cast(ctypes.c_char_p(openpgp),
1544
 
                                             ctypes.POINTER
1545
 
                                             (ctypes.c_ubyte)),
1546
 
                                 ctypes.c_uint(len(openpgp))))
1547
 
        # New empty GnuTLS certificate
1548
 
        crt = gnutls.library.types.gnutls_openpgp_crt_t()
1549
 
        (gnutls.library.functions
1550
 
         .gnutls_openpgp_crt_init(ctypes.byref(crt)))
1551
 
        # Import the OpenPGP public key into the certificate
1552
 
        (gnutls.library.functions
1553
 
         .gnutls_openpgp_crt_import(crt, ctypes.byref(datum),
1554
 
                                    gnutls.library.constants
1555
 
                                    .GNUTLS_OPENPGP_FMT_RAW))
1556
 
        # Verify the self signature in the key
1557
 
        crtverify = ctypes.c_uint()
1558
 
        (gnutls.library.functions
1559
 
         .gnutls_openpgp_crt_verify_self(crt, 0,
1560
 
                                         ctypes.byref(crtverify)))
1561
 
        if crtverify.value != 0:
1562
 
            gnutls.library.functions.gnutls_openpgp_crt_deinit(crt)
1563
 
            raise (gnutls.errors.CertificateSecurityError
1564
 
                   ("Verify failed"))
1565
 
        # New buffer for the fingerprint
1566
 
        buf = ctypes.create_string_buffer(20)
1567
 
        buf_len = ctypes.c_size_t()
1568
 
        # Get the fingerprint from the certificate into the buffer
1569
 
        (gnutls.library.functions
1570
 
         .gnutls_openpgp_crt_get_fingerprint(crt, ctypes.byref(buf),
1571
 
                                             ctypes.byref(buf_len)))
1572
 
        # Deinit the certificate
1573
 
        gnutls.library.functions.gnutls_openpgp_crt_deinit(crt)
1574
 
        # Convert the buffer to a Python bytestring
1575
 
        fpr = ctypes.string_at(buf, buf_len.value)
1576
 
        # Convert the bytestring to hexadecimal notation
1577
 
        hex_fpr = ''.join("%02X" % ord(char) for char in fpr)
1578
 
        return hex_fpr
1579
 
 
1580
 
 
1581
 
class MultiprocessingMixIn(object):
1582
 
    """Like socketserver.ThreadingMixIn, but with multiprocessing"""
1583
 
    def sub_process_main(self, request, address):
1584
 
        try:
1585
 
            self.finish_request(request, address)
1586
 
        except:
1587
 
            self.handle_error(request, address)
1588
 
        self.close_request(request)
1589
 
    
1590
 
    def process_request(self, request, address):
1591
 
        """Start a new process to process the request."""
1592
 
        proc = multiprocessing.Process(target = self.sub_process_main,
1593
 
                                       args = (request,
1594
 
                                               address))
1595
 
        proc.start()
1596
 
        return proc
1597
 
 
1598
 
 
1599
 
class MultiprocessingMixInWithPipe(MultiprocessingMixIn, object):
1600
 
    """ adds a pipe to the MixIn """
1601
 
    def process_request(self, request, client_address):
1602
 
        """Overrides and wraps the original process_request().
1603
 
        
1604
 
        This function creates a new pipe in self.pipe
1605
 
        """
1606
 
        parent_pipe, self.child_pipe = multiprocessing.Pipe()
1607
 
        
1608
 
        proc = MultiprocessingMixIn.process_request(self, request,
1609
 
                                                    client_address)
1610
 
        self.child_pipe.close()
1611
 
        self.add_pipe(parent_pipe, proc)
1612
 
    
1613
 
    def add_pipe(self, parent_pipe, proc):
1614
 
        """Dummy function; override as necessary"""
1615
 
        raise NotImplementedError
1616
 
 
1617
 
 
1618
 
class IPv6_TCPServer(MultiprocessingMixInWithPipe,
1619
 
                     socketserver.TCPServer, object):
1620
 
    """IPv6-capable TCP server.  Accepts 'None' as address and/or port
1621
 
    
 
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.
1622
726
    Attributes:
 
727
        settings:       Server settings
 
728
        clients:        Set() of Client objects
1623
729
        enabled:        Boolean; whether this server is activated yet
1624
 
        interface:      None or a network interface name (string)
1625
 
        use_ipv6:       Boolean; to use IPv6 or not
1626
730
    """
1627
 
    def __init__(self, server_address, RequestHandlerClass,
1628
 
                 interface=None, use_ipv6=True):
1629
 
        self.interface = interface
1630
 
        if use_ipv6:
1631
 
            self.address_family = socket.AF_INET6
1632
 
        socketserver.TCPServer.__init__(self, server_address,
1633
 
                                        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)
1634
741
    def server_bind(self):
1635
742
        """This overrides the normal server_bind() function
1636
743
        to bind to an interface if one was specified, and also NOT to
1637
744
        bind to an address or port if they were not specified."""
1638
 
        if self.interface is not None:
1639
 
            if SO_BINDTODEVICE is None:
1640
 
                logger.error("SO_BINDTODEVICE does not exist;"
1641
 
                             " cannot bind to interface %s",
1642
 
                             self.interface)
1643
 
            else:
1644
 
                try:
1645
 
                    self.socket.setsockopt(socket.SOL_SOCKET,
1646
 
                                           SO_BINDTODEVICE,
1647
 
                                           str(self.interface
1648
 
                                               + '\0'))
1649
 
                except socket.error as error:
1650
 
                    if error[0] == errno.EPERM:
1651
 
                        logger.error("No permission to"
1652
 
                                     " bind to interface %s",
1653
 
                                     self.interface)
1654
 
                    elif error[0] == errno.ENOPROTOOPT:
1655
 
                        logger.error("SO_BINDTODEVICE not available;"
1656
 
                                     " cannot bind to interface %s",
1657
 
                                     self.interface)
1658
 
                    else:
1659
 
                        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
1660
759
        # Only bind(2) the socket if we really need to.
1661
760
        if self.server_address[0] or self.server_address[1]:
1662
761
            if not self.server_address[0]:
1663
 
                if self.address_family == socket.AF_INET6:
1664
 
                    any_address = "::" # in6addr_any
1665
 
                else:
1666
 
                    any_address = socket.INADDR_ANY
1667
 
                self.server_address = (any_address,
 
762
                in6addr_any = "::"
 
763
                self.server_address = (in6addr_any,
1668
764
                                       self.server_address[1])
1669
765
            elif not self.server_address[1]:
1670
766
                self.server_address = (self.server_address[0],
1671
767
                                       0)
1672
 
#                 if self.interface:
 
768
#                 if self.settings["interface"]:
1673
769
#                     self.server_address = (self.server_address[0],
1674
770
#                                            0, # port
1675
771
#                                            0, # flowinfo
1676
772
#                                            if_nametoindex
1677
 
#                                            (self.interface))
1678
 
            return socketserver.TCPServer.server_bind(self)
1679
 
 
1680
 
 
1681
 
class MandosServer(IPv6_TCPServer):
1682
 
    """Mandos server.
1683
 
    
1684
 
    Attributes:
1685
 
        clients:        set of Client objects
1686
 
        gnutls_priority GnuTLS priority string
1687
 
        use_dbus:       Boolean; to emit D-Bus signals or not
1688
 
    
1689
 
    Assumes a gobject.MainLoop event loop.
1690
 
    """
1691
 
    def __init__(self, server_address, RequestHandlerClass,
1692
 
                 interface=None, use_ipv6=True, clients=None,
1693
 
                 gnutls_priority=None, use_dbus=True):
1694
 
        self.enabled = False
1695
 
        self.clients = clients
1696
 
        if self.clients is None:
1697
 
            self.clients = {}
1698
 
        self.use_dbus = use_dbus
1699
 
        self.gnutls_priority = gnutls_priority
1700
 
        IPv6_TCPServer.__init__(self, server_address,
1701
 
                                RequestHandlerClass,
1702
 
                                interface = interface,
1703
 
                                use_ipv6 = use_ipv6)
 
773
#                                            (self.settings
 
774
#                                             ["interface"]))
 
775
            return super(IPv6_TCPServer, self).server_bind()
1704
776
    def server_activate(self):
1705
777
        if self.enabled:
1706
 
            return socketserver.TCPServer.server_activate(self)
1707
 
    
 
778
            return super(IPv6_TCPServer, self).server_activate()
1708
779
    def enable(self):
1709
780
        self.enabled = True
1710
 
    
1711
 
    def add_pipe(self, parent_pipe, proc):
1712
 
        # Call "handle_ipc" for both data and EOF events
1713
 
        gobject.io_add_watch(parent_pipe.fileno(),
1714
 
                             gobject.IO_IN | gobject.IO_HUP,
1715
 
                             functools.partial(self.handle_ipc,
1716
 
                                               parent_pipe =
1717
 
                                               parent_pipe,
1718
 
                                               proc = proc))
1719
 
    
1720
 
    def handle_ipc(self, source, condition, parent_pipe=None,
1721
 
                   proc = None, client_object=None):
1722
 
        condition_names = {
1723
 
            gobject.IO_IN: "IN",   # There is data to read.
1724
 
            gobject.IO_OUT: "OUT", # Data can be written (without
1725
 
                                    # blocking).
1726
 
            gobject.IO_PRI: "PRI", # There is urgent data to read.
1727
 
            gobject.IO_ERR: "ERR", # Error condition.
1728
 
            gobject.IO_HUP: "HUP"  # Hung up (the connection has been
1729
 
                                    # broken, usually for pipes and
1730
 
                                    # sockets).
1731
 
            }
1732
 
        conditions_string = ' | '.join(name
1733
 
                                       for cond, name in
1734
 
                                       condition_names.iteritems()
1735
 
                                       if cond & condition)
1736
 
        # error, or the other end of multiprocessing.Pipe has closed
1737
 
        if condition & (gobject.IO_ERR | condition & gobject.IO_HUP):
1738
 
            # Wait for other process to exit
1739
 
            proc.join()
1740
 
            return False
1741
 
        
1742
 
        # Read a request from the child
1743
 
        request = parent_pipe.recv()
1744
 
        command = request[0]
1745
 
        
1746
 
        if command == 'init':
1747
 
            fpr = request[1]
1748
 
            address = request[2]
1749
 
            
1750
 
            for c in self.clients.itervalues():
1751
 
                if c.fingerprint == fpr:
1752
 
                    client = c
1753
 
                    break
1754
 
            else:
1755
 
                logger.info("Client not found for fingerprint: %s, ad"
1756
 
                            "dress: %s", fpr, address)
1757
 
                if self.use_dbus:
1758
 
                    # Emit D-Bus signal
1759
 
                    mandos_dbus_service.ClientNotFound(fpr,
1760
 
                                                       address[0])
1761
 
                parent_pipe.send(False)
1762
 
                return False
1763
 
            
1764
 
            gobject.io_add_watch(parent_pipe.fileno(),
1765
 
                                 gobject.IO_IN | gobject.IO_HUP,
1766
 
                                 functools.partial(self.handle_ipc,
1767
 
                                                   parent_pipe =
1768
 
                                                   parent_pipe,
1769
 
                                                   proc = proc,
1770
 
                                                   client_object =
1771
 
                                                   client))
1772
 
            parent_pipe.send(True)
1773
 
            # remove the old hook in favor of the new above hook on
1774
 
            # same fileno
1775
 
            return False
1776
 
        if command == 'funcall':
1777
 
            funcname = request[1]
1778
 
            args = request[2]
1779
 
            kwargs = request[3]
1780
 
            
1781
 
            parent_pipe.send(('data', getattr(client_object,
1782
 
                                              funcname)(*args,
1783
 
                                                         **kwargs)))
1784
 
        
1785
 
        if command == 'getattr':
1786
 
            attrname = request[1]
1787
 
            if callable(client_object.__getattribute__(attrname)):
1788
 
                parent_pipe.send(('function',))
1789
 
            else:
1790
 
                parent_pipe.send(('data', client_object
1791
 
                                  .__getattribute__(attrname)))
1792
 
        
1793
 
        if command == 'setattr':
1794
 
            attrname = request[1]
1795
 
            value = request[2]
1796
 
            setattr(client_object, attrname, value)
1797
 
        
1798
 
        return True
1799
781
 
1800
782
 
1801
783
def string_to_delta(interval):
1802
784
    """Parse a string and return a datetime.timedelta
1803
 
    
 
785
 
1804
786
    >>> string_to_delta('7d')
1805
787
    datetime.timedelta(7)
1806
788
    >>> string_to_delta('60s')
1809
791
    datetime.timedelta(0, 3600)
1810
792
    >>> string_to_delta('24h')
1811
793
    datetime.timedelta(1)
1812
 
    >>> string_to_delta('1w')
 
794
    >>> string_to_delta(u'1w')
1813
795
    datetime.timedelta(7)
1814
796
    >>> string_to_delta('5m 30s')
1815
797
    datetime.timedelta(0, 330)
1819
801
        try:
1820
802
            suffix = unicode(s[-1])
1821
803
            value = int(s[:-1])
1822
 
            if suffix == "d":
 
804
            if suffix == u"d":
1823
805
                delta = datetime.timedelta(value)
1824
 
            elif suffix == "s":
 
806
            elif suffix == u"s":
1825
807
                delta = datetime.timedelta(0, value)
1826
 
            elif suffix == "m":
 
808
            elif suffix == u"m":
1827
809
                delta = datetime.timedelta(0, 0, 0, 0, value)
1828
 
            elif suffix == "h":
 
810
            elif suffix == u"h":
1829
811
                delta = datetime.timedelta(0, 0, 0, 0, 0, value)
1830
 
            elif suffix == "w":
 
812
            elif suffix == u"w":
1831
813
                delta = datetime.timedelta(0, 0, 0, 0, 0, 0, value)
1832
814
            else:
1833
 
                raise ValueError("Unknown suffix %r" % suffix)
1834
 
        except (ValueError, IndexError) as e:
1835
 
            raise ValueError(*(e.args))
 
815
                raise ValueError
 
816
        except (ValueError, IndexError):
 
817
            raise ValueError
1836
818
        timevalue += delta
1837
819
    return timevalue
1838
820
 
1839
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
 
1840
845
def if_nametoindex(interface):
1841
 
    """Call the C function if_nametoindex(), or equivalent
1842
 
    
1843
 
    Note: This function cannot accept a unicode string."""
 
846
    """Call the C function if_nametoindex(), or equivalent"""
1844
847
    global if_nametoindex
1845
848
    try:
1846
849
        if_nametoindex = (ctypes.cdll.LoadLibrary
1847
850
                          (ctypes.util.find_library("c"))
1848
851
                          .if_nametoindex)
1849
852
    except (OSError, AttributeError):
1850
 
        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
1851
857
        def if_nametoindex(interface):
1852
858
            "Get an interface index the hard way, i.e. using fcntl()"
1853
859
            SIOCGIFINDEX = 0x8933  # From /usr/include/linux/sockios.h
1854
 
            with contextlib.closing(socket.socket()) as s:
 
860
            with closing(socket.socket()) as s:
1855
861
                ifreq = fcntl.ioctl(s, SIOCGIFINDEX,
1856
 
                                    struct.pack(str("16s16x"),
1857
 
                                                interface))
1858
 
            interface_index = struct.unpack(str("I"),
1859
 
                                            ifreq[16:20])[0]
 
862
                                    struct.pack("16s16x", interface))
 
863
            interface_index = struct.unpack("I", ifreq[16:20])[0]
1860
864
            return interface_index
1861
865
    return if_nametoindex(interface)
1862
866
 
1863
867
 
1864
868
def daemon(nochdir = False, noclose = False):
1865
869
    """See daemon(3).  Standard BSD Unix function.
1866
 
    
1867
870
    This should really exist as os.daemon, but it doesn't (yet)."""
1868
871
    if os.fork():
1869
872
        sys.exit()
1877
880
        null = os.open(os.path.devnull, os.O_NOCTTY | os.O_RDWR)
1878
881
        if not stat.S_ISCHR(os.fstat(null).st_mode):
1879
882
            raise OSError(errno.ENODEV,
1880
 
                          "%s not a character device"
1881
 
                          % os.path.devnull)
 
883
                          "/dev/null not a character device")
1882
884
        os.dup2(null, sys.stdin.fileno())
1883
885
        os.dup2(null, sys.stdout.fileno())
1884
886
        os.dup2(null, sys.stderr.fileno())
1887
889
 
1888
890
 
1889
891
def main():
1890
 
    
1891
 
    ##################################################################
1892
 
    # Parsing of options, both command line and config file
1893
 
    
1894
 
    parser = argparse.ArgumentParser()
1895
 
    parser.add_argument("-v", "--version", action="version",
1896
 
                        version = "%%(prog)s %s" % version,
1897
 
                        help="show version number and exit")
1898
 
    parser.add_argument("-i", "--interface", metavar="IF",
1899
 
                        help="Bind to interface IF")
1900
 
    parser.add_argument("-a", "--address",
1901
 
                        help="Address to listen for requests on")
1902
 
    parser.add_argument("-p", "--port", type=int,
1903
 
                        help="Port number to receive requests on")
1904
 
    parser.add_argument("--check", action="store_true",
1905
 
                        help="Run self-test")
1906
 
    parser.add_argument("--debug", action="store_true",
1907
 
                        help="Debug mode; run in foreground and log"
1908
 
                        " to terminal")
1909
 
    parser.add_argument("--debuglevel", metavar="LEVEL",
1910
 
                        help="Debug level for stdout output")
1911
 
    parser.add_argument("--priority", help="GnuTLS"
1912
 
                        " priority string (see GnuTLS documentation)")
1913
 
    parser.add_argument("--servicename",
1914
 
                        metavar="NAME", help="Zeroconf service name")
1915
 
    parser.add_argument("--configdir",
1916
 
                        default="/etc/mandos", metavar="DIR",
1917
 
                        help="Directory to search for configuration"
1918
 
                        " files")
1919
 
    parser.add_argument("--no-dbus", action="store_false",
1920
 
                        dest="use_dbus", help="Do not provide D-Bus"
1921
 
                        " system bus interface")
1922
 
    parser.add_argument("--no-ipv6", action="store_false",
1923
 
                        dest="use_ipv6", help="Do not use IPv6")
1924
 
    parser.add_argument("--no-restore", action="store_false",
1925
 
                        dest="restore", help="Do not restore stored state",
1926
 
                        default=True)
1927
 
 
1928
 
    options = parser.parse_args()
 
892
    parser = optparse.OptionParser(version = "%%prog %s" % version)
 
893
    parser.add_option("-i", "--interface", type="string",
 
894
                      metavar="IF", help="Bind to interface IF")
 
895
    parser.add_option("-a", "--address", type="string",
 
896
                      help="Address to listen for requests on")
 
897
    parser.add_option("-p", "--port", type="int",
 
898
                      help="Port number to receive requests on")
 
899
    parser.add_option("--check", action="store_true",
 
900
                      help="Run self-test")
 
901
    parser.add_option("--debug", action="store_true",
 
902
                      help="Debug mode; run in foreground and log to"
 
903
                      " terminal")
 
904
    parser.add_option("--priority", type="string", help="GnuTLS"
 
905
                      " priority string (see GnuTLS documentation)")
 
906
    parser.add_option("--servicename", type="string", metavar="NAME",
 
907
                      help="Zeroconf service name")
 
908
    parser.add_option("--configdir", type="string",
 
909
                      default="/etc/mandos", metavar="DIR",
 
910
                      help="Directory to search for configuration"
 
911
                      " files")
 
912
    parser.add_option("--no-dbus", action="store_false",
 
913
                      dest="use_dbus",
 
914
                      help="Do not provide D-Bus system bus"
 
915
                      " interface")
 
916
    options = parser.parse_args()[0]
1929
917
    
1930
918
    if options.check:
1931
919
        import doctest
1941
929
                        "SECURE256:!CTYPE-X.509:+CTYPE-OPENPGP",
1942
930
                        "servicename": "Mandos",
1943
931
                        "use_dbus": "True",
1944
 
                        "use_ipv6": "True",
1945
 
                        "debuglevel": "",
1946
932
                        }
1947
933
    
1948
934
    # Parse config file for server-global settings
1949
 
    server_config = configparser.SafeConfigParser(server_defaults)
 
935
    server_config = ConfigParser.SafeConfigParser(server_defaults)
1950
936
    del server_defaults
1951
 
    server_config.read(os.path.join(options.configdir,
1952
 
                                    "mandos.conf"))
 
937
    server_config.read(os.path.join(options.configdir, "mandos.conf"))
1953
938
    # Convert the SafeConfigParser object to a dict
1954
939
    server_settings = server_config.defaults()
1955
 
    # Use the appropriate methods on the non-string config options
1956
 
    for option in ("debug", "use_dbus", "use_ipv6"):
1957
 
        server_settings[option] = server_config.getboolean("DEFAULT",
1958
 
                                                           option)
1959
 
    if server_settings["port"]:
1960
 
        server_settings["port"] = server_config.getint("DEFAULT",
1961
 
                                                       "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"))
1962
945
    del server_config
1963
946
    
1964
947
    # Override the settings from the config file with command line
1965
948
    # options, if set.
1966
949
    for option in ("interface", "address", "port", "debug",
1967
950
                   "priority", "servicename", "configdir",
1968
 
                   "use_dbus", "use_ipv6", "debuglevel", "restore"):
 
951
                   "use_dbus"):
1969
952
        value = getattr(options, option)
1970
953
        if value is not None:
1971
954
            server_settings[option] = value
1972
955
    del options
1973
 
    # Force all strings to be unicode
1974
 
    for option in server_settings.keys():
1975
 
        if type(server_settings[option]) is str:
1976
 
            server_settings[option] = unicode(server_settings[option])
1977
956
    # Now we have our good server settings in "server_settings"
1978
957
    
1979
 
    ##################################################################
1980
 
    
1981
958
    # For convenience
1982
959
    debug = server_settings["debug"]
1983
 
    debuglevel = server_settings["debuglevel"]
1984
960
    use_dbus = server_settings["use_dbus"]
1985
 
    use_ipv6 = server_settings["use_ipv6"]
 
961
    
 
962
    if not debug:
 
963
        syslogger.setLevel(logging.WARNING)
 
964
        console.setLevel(logging.WARNING)
1986
965
    
1987
966
    if server_settings["servicename"] != "Mandos":
1988
967
        syslogger.setFormatter(logging.Formatter
1989
 
                               ('Mandos (%s) [%%(process)d]:'
1990
 
                                ' %%(levelname)s: %%(message)s'
 
968
                               ('Mandos (%s): %%(levelname)s:'
 
969
                                ' %%(message)s'
1991
970
                                % server_settings["servicename"]))
1992
971
    
1993
972
    # Parse config file with clients
1994
 
    client_defaults = { "timeout": "5m",
1995
 
                        "extended_timeout": "15m",
1996
 
                        "interval": "2m",
 
973
    client_defaults = { "timeout": "1h",
 
974
                        "interval": "5m",
1997
975
                        "checker": "fping -q -- %%(host)s",
1998
976
                        "host": "",
1999
 
                        "approval_delay": "0s",
2000
 
                        "approval_duration": "1s",
2001
977
                        }
2002
 
    client_config = configparser.SafeConfigParser(client_defaults)
 
978
    client_config = ConfigParser.SafeConfigParser(client_defaults)
2003
979
    client_config.read(os.path.join(server_settings["configdir"],
2004
980
                                    "clients.conf"))
2005
981
    
2006
 
    global mandos_dbus_service
2007
 
    mandos_dbus_service = None
2008
 
    
2009
 
    tcp_server = MandosServer((server_settings["address"],
2010
 
                               server_settings["port"]),
2011
 
                              ClientHandler,
2012
 
                              interface=(server_settings["interface"]
2013
 
                                         or None),
2014
 
                              use_ipv6=use_ipv6,
2015
 
                              gnutls_priority=
2016
 
                              server_settings["priority"],
2017
 
                              use_dbus=use_dbus)
2018
 
    if not debug:
2019
 
        pidfilename = "/var/run/mandos.pid"
2020
 
        try:
2021
 
            pidfile = open(pidfilename, "w")
2022
 
        except IOError:
2023
 
            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)
2024
993
    
2025
994
    try:
2026
995
        uid = pwd.getpwnam("_mandos").pw_uid
2032
1001
        except KeyError:
2033
1002
            try:
2034
1003
                uid = pwd.getpwnam("nobody").pw_uid
2035
 
                gid = pwd.getpwnam("nobody").pw_gid
 
1004
                gid = pwd.getpwnam("nogroup").pw_gid
2036
1005
            except KeyError:
2037
1006
                uid = 65534
2038
1007
                gid = 65534
2039
1008
    try:
 
1009
        os.setuid(uid)
2040
1010
        os.setgid(gid)
2041
 
        os.setuid(uid)
2042
 
    except OSError as error:
 
1011
    except OSError, error:
2043
1012
        if error[0] != errno.EPERM:
2044
1013
            raise error
2045
1014
    
2046
 
    if not debug and not debuglevel:
2047
 
        logger.setLevel(logging.WARNING)
2048
 
    if debuglevel:
2049
 
        level = getattr(logging, debuglevel.upper())
2050
 
        logger.setLevel(level)
 
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")
2051
1044
    
2052
1045
    if debug:
2053
 
        logger.setLevel(logging.DEBUG)
2054
 
        # Enable all possible GnuTLS debugging
2055
 
        
2056
 
        # "Use a log level over 10 to enable all debugging options."
2057
 
        # - GnuTLS manual
2058
 
        gnutls.library.functions.gnutls_global_set_log_level(11)
2059
 
        
2060
 
        @gnutls.library.types.gnutls_log_func
2061
 
        def debug_gnutls(level, string):
2062
 
            logger.debug("GnuTLS: %s", string[:-1])
2063
 
        
2064
 
        (gnutls.library.functions
2065
 
         .gnutls_global_set_log_function(debug_gnutls))
2066
 
        
2067
1046
        # Redirect stdin so all checkers get /dev/null
2068
1047
        null = os.open(os.path.devnull, os.O_NOCTTY | os.O_RDWR)
2069
1048
        os.dup2(null, sys.stdin.fileno())
2072
1051
    else:
2073
1052
        # No console logging
2074
1053
        logger.removeHandler(console)
2075
 
    
2076
 
    # Need to fork before connecting to D-Bus
2077
 
    if not debug:
2078
1054
        # Close all input and output, do double fork, etc.
2079
1055
        daemon()
2080
1056
    
2081
 
    global main_loop
2082
 
    # From the Avahi example code
2083
 
    DBusGMainLoop(set_as_default=True )
2084
 
    main_loop = gobject.MainLoop()
2085
 
    bus = dbus.SystemBus()
2086
 
    # End of Avahi example code
2087
 
    if use_dbus:
2088
 
        try:
2089
 
            bus_name = dbus.service.BusName("se.recompile.Mandos",
2090
 
                                            bus, do_not_queue=True)
2091
 
            old_bus_name = (dbus.service.BusName
2092
 
                            ("se.bsnet.fukt.Mandos", bus,
2093
 
                             do_not_queue=True))
2094
 
        except dbus.exceptions.NameExistsException as e:
2095
 
            logger.error(unicode(e) + ", disabling D-Bus")
2096
 
            use_dbus = False
2097
 
            server_settings["use_dbus"] = False
2098
 
            tcp_server.use_dbus = False
2099
 
    protocol = avahi.PROTO_INET6 if use_ipv6 else avahi.PROTO_INET
2100
 
    service = AvahiServiceToSyslog(name =
2101
 
                                   server_settings["servicename"],
2102
 
                                   servicetype = "_mandos._tcp",
2103
 
                                   protocol = protocol, bus = bus)
2104
 
    if server_settings["interface"]:
2105
 
        service.interface = (if_nametoindex
2106
 
                             (str(server_settings["interface"])))
2107
 
    
2108
 
    global multiprocessing_manager
2109
 
    multiprocessing_manager = multiprocessing.Manager()
2110
 
    
2111
 
    client_class = Client
2112
 
    if use_dbus:
2113
 
        client_class = functools.partial(ClientDBusTransitional,
2114
 
                                         bus = bus)
2115
 
    
2116
 
    special_settings = {
2117
 
        # Some settings need to be accessd by special methods;
2118
 
        # booleans need .getboolean(), etc.  Here is a list of them:
2119
 
        "approved_by_default":
2120
 
            lambda section:
2121
 
            client_config.getboolean(section, "approved_by_default"),
2122
 
        }
2123
 
    # Construct a new dict of client settings of this form:
2124
 
    # { client_name: {setting_name: value, ...}, ...}
2125
 
    # with exceptions for any special settings as defined above
2126
 
    client_settings = dict((clientname,
2127
 
                           dict((setting,
2128
 
                                 (value if setting not in special_settings
2129
 
                                  else special_settings[setting](clientname)))
2130
 
                                for setting, value in client_config.items(clientname)))
2131
 
                          for clientname in client_config.sections())
2132
 
    
2133
 
    old_client_settings = {}
2134
 
    clients_data = []
2135
 
 
2136
 
    # Get client data and settings from last running state. 
2137
 
    if server_settings["restore"]:
2138
 
        try:
2139
 
            with open(stored_state_path, "rb") as stored_state:
2140
 
                clients_data, old_client_settings = pickle.load(stored_state)
2141
 
            os.remove(stored_state_path)
2142
 
        except IOError as e:
2143
 
            logger.warning("Could not load persistant state: {0}".format(e))
2144
 
            if e.errno != errno.ENOENT:
2145
 
                raise
2146
 
 
2147
 
    for client in clients_data:
2148
 
        client_name = client["name"]
2149
 
        
2150
 
        # Decide which value to use after restoring saved state.
2151
 
        # We have three different values: Old config file,
2152
 
        # new config file, and saved state.
2153
 
        # New config value takes precedence if it differs from old
2154
 
        # config value, otherwise use saved state.
2155
 
        for name, value in client_settings[client_name].items():
2156
 
            try:
2157
 
                # For each value in new config, check if it differs
2158
 
                # from the old config value (Except for the "secret"
2159
 
                # attribute)
2160
 
                if name != "secret" and value != old_client_settings[client_name][name]:
2161
 
                    setattr(client, name, value)
2162
 
            except KeyError:
2163
 
                pass
2164
 
 
2165
 
        # Clients who has passed its expire date, can still be enabled if its
2166
 
        # last checker was sucessful. Clients who checkers failed before we
2167
 
        # stored it state is asumed to had failed checker during downtime.
2168
 
        if client["enabled"] and client["last_checked_ok"]:
2169
 
            if ((datetime.datetime.utcnow() - client["last_checked_ok"])
2170
 
                > client["interval"]):
2171
 
                if client["last_checker_status"] != 0:
2172
 
                    client["enabled"] = False
2173
 
                else:
2174
 
                    client["expires"] = datetime.datetime.utcnow() + client["timeout"]
2175
 
 
2176
 
        client["changedstate"] = (multiprocessing_manager
2177
 
                                  .Condition(multiprocessing_manager
2178
 
                                             .Lock()))
2179
 
        if use_dbus:
2180
 
            new_client = ClientDBusTransitional.__new__(ClientDBusTransitional)
2181
 
            tcp_server.clients[client_name] = new_client
2182
 
            new_client.bus = bus
2183
 
            for name, value in client.iteritems():
2184
 
                setattr(new_client, name, value)
2185
 
            client_object_name = unicode(client_name).translate(
2186
 
                {ord("."): ord("_"),
2187
 
                 ord("-"): ord("_")})
2188
 
            new_client.dbus_object_path = (dbus.ObjectPath
2189
 
                                     ("/clients/" + client_object_name))
2190
 
            DBusObjectWithProperties.__init__(new_client,
2191
 
                                              new_client.bus,
2192
 
                                              new_client.dbus_object_path)
2193
 
        else:
2194
 
            tcp_server.clients[client_name] = Client.__new__(Client)
2195
 
            for name, value in client.iteritems():
2196
 
                setattr(tcp_server.clients[client_name], name, value)
2197
 
                
2198
 
        tcp_server.clients[client_name].decrypt_secret(
2199
 
            client_settings[client_name]["secret"])            
2200
 
        
2201
 
    # Create/remove clients based on new changes made to config
2202
 
    for clientname in set(old_client_settings) - set(client_settings):
2203
 
        del tcp_server.clients[clientname]
2204
 
    for clientname in set(client_settings) - set(old_client_settings):
2205
 
        tcp_server.clients[clientname] = (client_class(name = clientname,
2206
 
                                                       config =
2207
 
                                                       client_settings
2208
 
                                                       [clientname]))
2209
 
    
2210
 
 
2211
 
    if not tcp_server.clients:
2212
 
        logger.warning("No clients defined")
2213
 
        
 
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
 
1078
        
 
1079
        while clients:
 
1080
            client = clients.pop()
 
1081
            client.disable_hook = None
 
1082
            client.disable()
 
1083
    
 
1084
    atexit.register(cleanup)
 
1085
    
2214
1086
    if not debug:
2215
 
        try:
2216
 
            with pidfile:
2217
 
                pid = os.getpid()
2218
 
                pidfile.write(str(pid) + "\n".encode("utf-8"))
2219
 
            del pidfile
2220
 
        except IOError:
2221
 
            logger.error("Could not write to file %r with PID %d",
2222
 
                         pidfilename, pid)
2223
 
        except NameError:
2224
 
            # "pidfile" was never created
2225
 
            pass
2226
 
        del pidfilename
2227
 
        
2228
1087
        signal.signal(signal.SIGINT, signal.SIG_IGN)
2229
 
    
2230
1088
    signal.signal(signal.SIGHUP, lambda signum, frame: sys.exit())
2231
1089
    signal.signal(signal.SIGTERM, lambda signum, frame: sys.exit())
2232
1090
    
2233
1091
    if use_dbus:
2234
 
        class MandosDBusService(dbus.service.Object):
 
1092
        class MandosServer(dbus.service.Object):
2235
1093
            """A D-Bus proxy object"""
2236
1094
            def __init__(self):
2237
 
                dbus.service.Object.__init__(self, bus, "/")
2238
 
            _interface = "se.recompile.Mandos"
2239
 
            
 
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
 
2240
1104
            @dbus.service.signal(_interface, signature="o")
2241
 
            def ClientAdded(self, objpath):
2242
 
                "D-Bus signal"
2243
 
                pass
2244
 
            
2245
 
            @dbus.service.signal(_interface, signature="ss")
2246
 
            def ClientNotFound(self, fingerprint, address):
2247
 
                "D-Bus signal"
2248
 
                pass
2249
 
            
2250
 
            @dbus.service.signal(_interface, signature="os")
2251
 
            def ClientRemoved(self, objpath, name):
2252
 
                "D-Bus signal"
2253
 
                pass
2254
 
            
 
1105
            def ClientRemoved(self, objpath):
 
1106
                "D-Bus signal"
 
1107
                pass
 
1108
 
2255
1109
            @dbus.service.method(_interface, out_signature="ao")
2256
1110
            def GetAllClients(self):
2257
 
                "D-Bus method"
2258
 
                return dbus.Array(c.dbus_object_path
2259
 
                                  for c in
2260
 
                                  tcp_server.clients.itervalues())
2261
 
            
2262
 
            @dbus.service.method(_interface,
2263
 
                                 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}}")
2264
1114
            def GetAllClientsWithProperties(self):
2265
 
                "D-Bus method"
2266
1115
                return dbus.Dictionary(
2267
 
                    ((c.dbus_object_path, c.GetAll(""))
2268
 
                     for c in tcp_server.clients.itervalues()),
 
1116
                    ((c.dbus_object_path, c.GetAllProperties())
 
1117
                     for c in clients),
2269
1118
                    signature="oa{sv}")
2270
 
            
 
1119
 
2271
1120
            @dbus.service.method(_interface, in_signature="o")
2272
1121
            def RemoveClient(self, object_path):
2273
 
                "D-Bus method"
2274
 
                for c in tcp_server.clients.itervalues():
 
1122
                for c in clients:
2275
1123
                    if c.dbus_object_path == object_path:
2276
 
                        del tcp_server.clients[c.name]
2277
 
                        c.remove_from_connection()
 
1124
                        clients.remove(c)
2278
1125
                        # Don't signal anything except ClientRemoved
2279
 
                        c.disable(quiet=True)
 
1126
                        c.use_dbus = False
 
1127
                        c.disable()
2280
1128
                        # Emit D-Bus signal
2281
 
                        self.ClientRemoved(object_path, c.name)
 
1129
                        self.ClientRemoved(object_path)
2282
1130
                        return
2283
 
                raise KeyError(object_path)
2284
 
            
 
1131
                raise KeyError
 
1132
            @dbus.service.method(_interface)
 
1133
            def Quit(self):
 
1134
                main_loop.quit()
 
1135
 
2285
1136
            del _interface
2286
 
        
2287
 
        class MandosDBusServiceTransitional(MandosDBusService):
2288
 
            __metaclass__ = AlternateDBusNamesMetaclass
2289
 
        mandos_dbus_service = MandosDBusServiceTransitional()
2290
 
    
2291
 
    def cleanup():
2292
 
        "Cleanup function; run on exit"
2293
 
        service.cleanup()
2294
 
        
2295
 
        multiprocessing.active_children()
2296
 
        if not (tcp_server.clients or client_settings):
2297
 
            return
2298
 
 
2299
 
        # Store client before exiting. Secrets are encrypted with key based
2300
 
        # on what config file has. If config file is removed/edited, old
2301
 
        # secret will thus be unrecovable.
2302
 
        clients = []
2303
 
        for client in tcp_server.clients.itervalues():
2304
 
            client.encrypt_secret(client_settings[client.name]["secret"])
2305
 
 
2306
 
            client_dict = {}
2307
 
 
2308
 
            # A list of attributes that will not be stored when shuting down.
2309
 
            exclude = set(("bus", "changedstate", "secret"))            
2310
 
            for name, typ in inspect.getmembers(dbus.service.Object):
2311
 
                exclude.add(name)
2312
 
                
2313
 
            client_dict["encrypted_secret"] = client.encrypted_secret
2314
 
            for attr in client.client_structure:
2315
 
                if attr not in exclude:
2316
 
                    client_dict[attr] = getattr(client, attr)
2317
 
 
2318
 
            clients.append(client_dict) 
2319
 
            del client_settings[client.name]["secret"]
2320
 
            
2321
 
        try:
2322
 
            with os.fdopen(os.open(stored_state_path, os.O_CREAT|os.O_WRONLY|os.O_TRUNC, 0600), "wb") as stored_state:
2323
 
                pickle.dump((clients, client_settings), stored_state)
2324
 
        except IOError as e:
2325
 
            logger.warning("Could not save persistant state: {0}".format(e))
2326
 
            if e.errno != errno.ENOENT:
2327
 
                raise
2328
 
 
2329
 
        # Delete all clients, and settings from config
2330
 
        while tcp_server.clients:
2331
 
            name, client = tcp_server.clients.popitem()
2332
 
            if use_dbus:
2333
 
                client.remove_from_connection()
2334
 
            # Don't signal anything except ClientRemoved
2335
 
            client.disable(quiet=True)
2336
 
            if use_dbus:
2337
 
                # Emit D-Bus signal
2338
 
                mandos_dbus_service.ClientRemoved(client
2339
 
                                                  .dbus_object_path,
2340
 
                                                  client.name)
2341
 
        client_settings.clear()
2342
 
    
2343
 
    atexit.register(cleanup)
2344
 
    
2345
 
    for client in tcp_server.clients.itervalues():
 
1137
    
 
1138
        mandos_server = MandosServer()
 
1139
    
 
1140
    for client in clients:
2346
1141
        if use_dbus:
2347
1142
            # Emit D-Bus signal
2348
 
            mandos_dbus_service.ClientAdded(client.dbus_object_path)
2349
 
        # Need to initiate checking of clients
2350
 
        if client.enabled:
2351
 
            client.init_checker()
2352
 
 
 
1143
            mandos_server.ClientAdded(client.dbus_object_path,
 
1144
                                      client.GetAllProperties())
 
1145
        client.enable()
2353
1146
    
2354
1147
    tcp_server.enable()
2355
1148
    tcp_server.server_activate()
2356
1149
    
2357
1150
    # Find out what port we got
2358
1151
    service.port = tcp_server.socket.getsockname()[1]
2359
 
    if use_ipv6:
2360
 
        logger.info("Now listening on address %r, port %d,"
2361
 
                    " flowinfo %d, scope_id %d"
2362
 
                    % tcp_server.socket.getsockname())
2363
 
    else:                       # IPv4
2364
 
        logger.info("Now listening on address %r, port %d"
2365
 
                    % 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())
2366
1154
    
2367
1155
    #service.interface = tcp_server.socket.getsockname()[3]
2368
1156
    
2369
1157
    try:
2370
1158
        # From the Avahi example code
 
1159
        server.connect_to_signal("StateChanged", server_state_changed)
2371
1160
        try:
2372
 
            service.activate()
2373
 
        except dbus.exceptions.DBusException as error:
2374
 
            logger.critical("DBusException: %s", error)
2375
 
            cleanup()
 
1161
            server_state_changed(server.GetState())
 
1162
        except dbus.exceptions.DBusException, error:
 
1163
            logger.critical(u"DBusException: %s", error)
2376
1164
            sys.exit(1)
2377
1165
        # End of Avahi example code
2378
1166
        
2381
1169
                             (tcp_server.handle_request
2382
1170
                              (*args[2:], **kwargs) or True))
2383
1171
        
2384
 
        logger.debug("Starting main loop")
 
1172
        logger.debug(u"Starting main loop")
2385
1173
        main_loop.run()
2386
 
    except AvahiError as error:
2387
 
        logger.critical("AvahiError: %s", error)
2388
 
        cleanup()
 
1174
    except AvahiError, error:
 
1175
        logger.critical(u"AvahiError: %s", error)
2389
1176
        sys.exit(1)
2390
1177
    except KeyboardInterrupt:
2391
1178
        if debug:
2392
 
            print("", file=sys.stderr)
2393
 
        logger.debug("Server received KeyboardInterrupt")
2394
 
    logger.debug("Server exiting")
2395
 
    # Must run before the D-Bus bus name gets deregistered
2396
 
    cleanup()
2397
 
 
 
1179
            print
2398
1180
 
2399
1181
if __name__ == '__main__':
2400
1182
    main()