/mandos/trunk

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  • Committer: Teddy Hogeborn
  • Date: 2010-10-13 06:12:52 UTC
  • Revision ID: teddy@fukt.bsnet.se-20101013061252-3a918xedja5caya8
* debian/mandos-client.lintian-overrides: Added plugins.d/plymouth.

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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" and "remove" in the "AvahiService" class, the
10
 
# "server_state_changed" and "entry_group_state_changed" functions,
11
 
# and some lines in "main".
 
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".
12
12
13
13
# Everything else is
14
 
# Copyright © 2008 Teddy Hogeborn
15
 
# Copyright © 2008 Björn Påhlsson
 
14
# Copyright © 2008-2010 Teddy Hogeborn
 
15
# Copyright © 2008-2010 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
33
33
 
34
34
from __future__ import division, with_statement, absolute_import
35
35
 
36
 
import SocketServer
 
36
import SocketServer as socketserver
37
37
import socket
38
 
from optparse import OptionParser
 
38
import optparse
39
39
import datetime
40
40
import errno
41
41
import gnutls.crypto
44
44
import gnutls.library.functions
45
45
import gnutls.library.constants
46
46
import gnutls.library.types
47
 
import ConfigParser
 
47
import ConfigParser as configparser
48
48
import sys
49
49
import re
50
50
import os
51
51
import signal
52
 
from sets import Set
53
52
import subprocess
54
53
import atexit
55
54
import stat
56
55
import logging
57
56
import logging.handlers
58
57
import pwd
59
 
from contextlib import closing
 
58
import contextlib
 
59
import struct
 
60
import fcntl
 
61
import functools
 
62
import cPickle as pickle
 
63
import multiprocessing
60
64
 
61
65
import dbus
62
66
import dbus.service
65
69
from dbus.mainloop.glib import DBusGMainLoop
66
70
import ctypes
67
71
import ctypes.util
68
 
 
69
 
version = "1.0.2"
70
 
 
71
 
logger = logging.Logger('mandos')
 
72
import xml.dom.minidom
 
73
import inspect
 
74
 
 
75
try:
 
76
    SO_BINDTODEVICE = socket.SO_BINDTODEVICE
 
77
except AttributeError:
 
78
    try:
 
79
        from IN import SO_BINDTODEVICE
 
80
    except ImportError:
 
81
        SO_BINDTODEVICE = None
 
82
 
 
83
 
 
84
version = "1.2.3"
 
85
 
 
86
#logger = logging.getLogger(u'mandos')
 
87
logger = logging.Logger(u'mandos')
72
88
syslogger = (logging.handlers.SysLogHandler
73
89
             (facility = logging.handlers.SysLogHandler.LOG_DAEMON,
74
90
              address = "/dev/log"))
75
91
syslogger.setFormatter(logging.Formatter
76
 
                       ('Mandos: %(levelname)s: %(message)s'))
 
92
                       (u'Mandos [%(process)d]: %(levelname)s:'
 
93
                        u' %(message)s'))
77
94
logger.addHandler(syslogger)
78
95
 
79
96
console = logging.StreamHandler()
80
 
console.setFormatter(logging.Formatter('%(name)s: %(levelname)s:'
81
 
                                       ' %(message)s'))
 
97
console.setFormatter(logging.Formatter(u'%(name)s [%(process)d]:'
 
98
                                       u' %(levelname)s:'
 
99
                                       u' %(message)s'))
82
100
logger.addHandler(console)
83
101
 
84
102
class AvahiError(Exception):
85
 
    def __init__(self, value):
 
103
    def __init__(self, value, *args, **kwargs):
86
104
        self.value = value
87
 
        super(AvahiError, self).__init__()
88
 
    def __str__(self):
89
 
        return repr(self.value)
 
105
        super(AvahiError, self).__init__(value, *args, **kwargs)
 
106
    def __unicode__(self):
 
107
        return unicode(repr(self.value))
90
108
 
91
109
class AvahiServiceError(AvahiError):
92
110
    pass
97
115
 
98
116
class AvahiService(object):
99
117
    """An Avahi (Zeroconf) service.
 
118
    
100
119
    Attributes:
101
120
    interface: integer; avahi.IF_UNSPEC or an interface index.
102
121
               Used to optionally bind to the specified interface.
103
 
    name: string; Example: 'Mandos'
104
 
    type: string; Example: '_mandos._tcp'.
 
122
    name: string; Example: u'Mandos'
 
123
    type: string; Example: u'_mandos._tcp'.
105
124
                  See <http://www.dns-sd.org/ServiceTypes.html>
106
125
    port: integer; what port to announce
107
126
    TXT: list of strings; TXT record for the service
110
129
    max_renames: integer; maximum number of renames
111
130
    rename_count: integer; counter so we only rename after collisions
112
131
                  a sensible number of times
 
132
    group: D-Bus Entry Group
 
133
    server: D-Bus Server
 
134
    bus: dbus.SystemBus()
113
135
    """
114
136
    def __init__(self, interface = avahi.IF_UNSPEC, name = None,
115
137
                 servicetype = None, port = None, TXT = None,
116
 
                 domain = "", host = "", max_renames = 32768):
 
138
                 domain = u"", host = u"", max_renames = 32768,
 
139
                 protocol = avahi.PROTO_UNSPEC, bus = None):
117
140
        self.interface = interface
118
141
        self.name = name
119
142
        self.type = servicetype
123
146
        self.host = host
124
147
        self.rename_count = 0
125
148
        self.max_renames = max_renames
 
149
        self.protocol = protocol
 
150
        self.group = None       # our entry group
 
151
        self.server = None
 
152
        self.bus = bus
126
153
    def rename(self):
127
154
        """Derived from the Avahi example code"""
128
155
        if self.rename_count >= self.max_renames:
129
156
            logger.critical(u"No suitable Zeroconf service name found"
130
157
                            u" after %i retries, exiting.",
131
158
                            self.rename_count)
132
 
            raise AvahiServiceError("Too many renames")
133
 
        self.name = server.GetAlternativeServiceName(self.name)
 
159
            raise AvahiServiceError(u"Too many renames")
 
160
        self.name = unicode(self.server.GetAlternativeServiceName(self.name))
134
161
        logger.info(u"Changing Zeroconf service name to %r ...",
135
 
                    str(self.name))
 
162
                    self.name)
136
163
        syslogger.setFormatter(logging.Formatter
137
 
                               ('Mandos (%s): %%(levelname)s:'
138
 
                                ' %%(message)s' % self.name))
 
164
                               (u'Mandos (%s) [%%(process)d]:'
 
165
                                u' %%(levelname)s: %%(message)s'
 
166
                                % self.name))
139
167
        self.remove()
140
 
        self.add()
 
168
        try:
 
169
            self.add()
 
170
        except dbus.exceptions.DBusException, error:
 
171
            logger.critical(u"DBusException: %s", error)
 
172
            self.cleanup()
 
173
            os._exit(1)
141
174
        self.rename_count += 1
142
175
    def remove(self):
143
176
        """Derived from the Avahi example code"""
144
 
        if group is not None:
145
 
            group.Reset()
 
177
        if self.group is not None:
 
178
            self.group.Reset()
146
179
    def add(self):
147
180
        """Derived from the Avahi example code"""
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)
 
181
        if self.group is None:
 
182
            self.group = dbus.Interface(
 
183
                self.bus.get_object(avahi.DBUS_NAME,
 
184
                                    self.server.EntryGroupNew()),
 
185
                avahi.DBUS_INTERFACE_ENTRY_GROUP)
 
186
            self.group.connect_to_signal('StateChanged',
 
187
                                         self
 
188
                                         .entry_group_state_changed)
156
189
        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_struct(dt, variant_level=0):
174
 
    """Convert a UTC datetime.datetime() to a D-Bus struct.
175
 
    The format is special to this application, since we could not find
176
 
    any other standard way."""
177
 
    return dbus.Struct((dbus.Int16(dt.year),
178
 
                        dbus.Byte(dt.month),
179
 
                        dbus.Byte(dt.day),
180
 
                        dbus.Byte(dt.hour),
181
 
                        dbus.Byte(dt.minute),
182
 
                        dbus.Byte(dt.second),
183
 
                        dbus.UInt32(dt.microsecond)),
184
 
                       signature="nyyyyyu",
185
 
                       variant_level=variant_level)
186
 
 
187
 
 
188
 
class Client(dbus.service.Object):
 
190
                     self.name, self.type)
 
191
        self.group.AddService(
 
192
            self.interface,
 
193
            self.protocol,
 
194
            dbus.UInt32(0),     # flags
 
195
            self.name, self.type,
 
196
            self.domain, self.host,
 
197
            dbus.UInt16(self.port),
 
198
            avahi.string_array_to_txt_array(self.TXT))
 
199
        self.group.Commit()
 
200
    def entry_group_state_changed(self, state, error):
 
201
        """Derived from the Avahi example code"""
 
202
        logger.debug(u"Avahi entry group state change: %i", state)
 
203
        
 
204
        if state == avahi.ENTRY_GROUP_ESTABLISHED:
 
205
            logger.debug(u"Zeroconf service established.")
 
206
        elif state == avahi.ENTRY_GROUP_COLLISION:
 
207
            logger.warning(u"Zeroconf service name collision.")
 
208
            self.rename()
 
209
        elif state == avahi.ENTRY_GROUP_FAILURE:
 
210
            logger.critical(u"Avahi: Error in group state changed %s",
 
211
                            unicode(error))
 
212
            raise AvahiGroupError(u"State changed: %s"
 
213
                                  % unicode(error))
 
214
    def cleanup(self):
 
215
        """Derived from the Avahi example code"""
 
216
        if self.group is not None:
 
217
            self.group.Free()
 
218
            self.group = None
 
219
    def server_state_changed(self, state):
 
220
        """Derived from the Avahi example code"""
 
221
        logger.debug(u"Avahi server state change: %i", state)
 
222
        if state == avahi.SERVER_COLLISION:
 
223
            logger.error(u"Zeroconf server name collision")
 
224
            self.remove()
 
225
        elif state == avahi.SERVER_RUNNING:
 
226
            self.add()
 
227
    def activate(self):
 
228
        """Derived from the Avahi example code"""
 
229
        if self.server is None:
 
230
            self.server = dbus.Interface(
 
231
                self.bus.get_object(avahi.DBUS_NAME,
 
232
                                    avahi.DBUS_PATH_SERVER),
 
233
                avahi.DBUS_INTERFACE_SERVER)
 
234
        self.server.connect_to_signal(u"StateChanged",
 
235
                                 self.server_state_changed)
 
236
        self.server_state_changed(self.server.GetState())
 
237
 
 
238
 
 
239
class Client(object):
189
240
    """A representation of a client host served by this server.
 
241
    
190
242
    Attributes:
191
 
    name:       string; from the config file, used in log messages
 
243
    _approved:   bool(); 'None' if not yet approved/disapproved
 
244
    approval_delay: datetime.timedelta(); Time to wait for approval
 
245
    approval_duration: datetime.timedelta(); Duration of one approval
 
246
    checker:    subprocess.Popen(); a running checker process used
 
247
                                    to see if the client lives.
 
248
                                    'None' if no process is running.
 
249
    checker_callback_tag: a gobject event source tag, or None
 
250
    checker_command: string; External command which is run to check
 
251
                     if client lives.  %() expansions are done at
 
252
                     runtime with vars(self) as dict, so that for
 
253
                     instance %(name)s can be used in the command.
 
254
    checker_initiator_tag: a gobject event source tag, or None
 
255
    created:    datetime.datetime(); (UTC) object creation
 
256
    current_checker_command: string; current running checker_command
 
257
    disable_hook:  If set, called by disable() as disable_hook(self)
 
258
    disable_initiator_tag: a gobject event source tag, or None
 
259
    enabled:    bool()
192
260
    fingerprint: string (40 or 32 hexadecimal digits); used to
193
261
                 uniquely identify the client
194
 
    secret:     bytestring; sent verbatim (over TLS) to client
195
262
    host:       string; available for use by the checker command
196
 
    created:    datetime.datetime(); (UTC) object creation
197
 
    last_started: datetime.datetime(); (UTC)
198
 
    started:    bool()
 
263
    interval:   datetime.timedelta(); How often to start a new checker
 
264
    last_approval_request: datetime.datetime(); (UTC) or None
199
265
    last_checked_ok: datetime.datetime(); (UTC) or None
 
266
    last_enabled: datetime.datetime(); (UTC)
 
267
    name:       string; from the config file, used in log messages and
 
268
                        D-Bus identifiers
 
269
    secret:     bytestring; sent verbatim (over TLS) to client
200
270
    timeout:    datetime.timedelta(); How long from last_checked_ok
201
 
                                      until this client is invalid
202
 
    interval:   datetime.timedelta(); How often to start a new checker
203
 
    stop_hook:  If set, called by stop() as stop_hook(self)
204
 
    checker:    subprocess.Popen(); a running checker process used
205
 
                                    to see if the client lives.
206
 
                                    'None' if no process is running.
207
 
    checker_initiator_tag: a gobject event source tag, or None
208
 
    stop_initiator_tag:    - '' -
209
 
    checker_callback_tag:  - '' -
210
 
    checker_command: string; External command which is run to check if
211
 
                     client lives.  %() expansions are done at
212
 
                     runtime with vars(self) as dict, so that for
213
 
                     instance %(name)s can be used in the command.
214
 
    dbus_object_path: dbus.ObjectPath
215
 
    Private attibutes:
216
 
    _timeout: Real variable for 'timeout'
217
 
    _interval: Real variable for 'interval'
218
 
    _timeout_milliseconds: Used when calling gobject.timeout_add()
219
 
    _interval_milliseconds: - '' -
 
271
                                      until this client is disabled
 
272
    runtime_expansions: Allowed attributes for runtime expansion.
220
273
    """
221
 
    def _set_timeout(self, timeout):
222
 
        "Setter function for the 'timeout' attribute"
223
 
        self._timeout = timeout
224
 
        self._timeout_milliseconds = ((self.timeout.days
225
 
                                       * 24 * 60 * 60 * 1000)
226
 
                                      + (self.timeout.seconds * 1000)
227
 
                                      + (self.timeout.microseconds
228
 
                                         // 1000))
229
 
        # Emit D-Bus signal
230
 
        self.PropertyChanged(dbus.String(u"timeout"),
231
 
                             (dbus.UInt64(self._timeout_milliseconds,
232
 
                                          variant_level=1)))
233
 
    timeout = property(lambda self: self._timeout, _set_timeout)
234
 
    del _set_timeout
235
 
    
236
 
    def _set_interval(self, interval):
237
 
        "Setter function for the 'interval' attribute"
238
 
        self._interval = interval
239
 
        self._interval_milliseconds = ((self.interval.days
240
 
                                        * 24 * 60 * 60 * 1000)
241
 
                                       + (self.interval.seconds
242
 
                                          * 1000)
243
 
                                       + (self.interval.microseconds
244
 
                                          // 1000))
245
 
        # Emit D-Bus signal
246
 
        self.PropertyChanged(dbus.String(u"interval"),
247
 
                             (dbus.UInt64(self._interval_milliseconds,
248
 
                                          variant_level=1)))
249
 
    interval = property(lambda self: self._interval, _set_interval)
250
 
    del _set_interval
251
 
    
252
 
    def __init__(self, name = None, stop_hook=None, config=None):
 
274
    
 
275
    runtime_expansions = (u"approval_delay", u"approval_duration",
 
276
                          u"created", u"enabled", u"fingerprint",
 
277
                          u"host", u"interval", u"last_checked_ok",
 
278
                          u"last_enabled", u"name", u"timeout")
 
279
    
 
280
    @staticmethod
 
281
    def _timedelta_to_milliseconds(td):
 
282
        "Convert a datetime.timedelta() to milliseconds"
 
283
        return ((td.days * 24 * 60 * 60 * 1000)
 
284
                + (td.seconds * 1000)
 
285
                + (td.microseconds // 1000))
 
286
    
 
287
    def timeout_milliseconds(self):
 
288
        "Return the 'timeout' attribute in milliseconds"
 
289
        return self._timedelta_to_milliseconds(self.timeout)
 
290
    
 
291
    def interval_milliseconds(self):
 
292
        "Return the 'interval' attribute in milliseconds"
 
293
        return self._timedelta_to_milliseconds(self.interval)
 
294
 
 
295
    def approval_delay_milliseconds(self):
 
296
        return self._timedelta_to_milliseconds(self.approval_delay)
 
297
    
 
298
    def __init__(self, name = None, disable_hook=None, config=None):
253
299
        """Note: the 'checker' key in 'config' sets the
254
300
        'checker_command' attribute and *not* the 'checker'
255
301
        attribute."""
256
 
        self.dbus_object_path = (dbus.ObjectPath
257
 
                                 ("/Mandos/clients/"
258
 
                                  + name.replace(".", "_")))
259
 
        dbus.service.Object.__init__(self, bus,
260
 
                                     self.dbus_object_path)
 
302
        self.name = name
261
303
        if config is None:
262
304
            config = {}
263
 
        self.name = name
264
305
        logger.debug(u"Creating client %r", self.name)
265
306
        # Uppercase and remove spaces from fingerprint for later
266
307
        # comparison purposes with return value from the fingerprint()
267
308
        # function
268
 
        self.fingerprint = (config["fingerprint"].upper()
 
309
        self.fingerprint = (config[u"fingerprint"].upper()
269
310
                            .replace(u" ", u""))
270
311
        logger.debug(u"  Fingerprint: %s", self.fingerprint)
271
 
        if "secret" in config:
272
 
            self.secret = config["secret"].decode(u"base64")
273
 
        elif "secfile" in config:
274
 
            with closing(open(os.path.expanduser
275
 
                              (os.path.expandvars
276
 
                               (config["secfile"])))) as secfile:
 
312
        if u"secret" in config:
 
313
            self.secret = config[u"secret"].decode(u"base64")
 
314
        elif u"secfile" in config:
 
315
            with open(os.path.expanduser(os.path.expandvars
 
316
                                         (config[u"secfile"])),
 
317
                      "rb") as secfile:
277
318
                self.secret = secfile.read()
278
319
        else:
279
320
            raise TypeError(u"No secret or secfile for client %s"
280
321
                            % self.name)
281
 
        self.host = config.get("host", "")
 
322
        self.host = config.get(u"host", u"")
282
323
        self.created = datetime.datetime.utcnow()
283
 
        self.started = False
284
 
        self.last_started = None
 
324
        self.enabled = False
 
325
        self.last_approval_request = None
 
326
        self.last_enabled = None
285
327
        self.last_checked_ok = None
286
 
        self.timeout = string_to_delta(config["timeout"])
287
 
        self.interval = string_to_delta(config["interval"])
288
 
        self.stop_hook = stop_hook
 
328
        self.timeout = string_to_delta(config[u"timeout"])
 
329
        self.interval = string_to_delta(config[u"interval"])
 
330
        self.disable_hook = disable_hook
289
331
        self.checker = None
290
332
        self.checker_initiator_tag = None
291
 
        self.stop_initiator_tag = None
 
333
        self.disable_initiator_tag = None
292
334
        self.checker_callback_tag = None
293
 
        self.checker_command = config["checker"]
 
335
        self.checker_command = config[u"checker"]
 
336
        self.current_checker_command = None
 
337
        self.last_connect = None
 
338
        self._approved = None
 
339
        self.approved_by_default = config.get(u"approved_by_default",
 
340
                                              True)
 
341
        self.approvals_pending = 0
 
342
        self.approval_delay = string_to_delta(
 
343
            config[u"approval_delay"])
 
344
        self.approval_duration = string_to_delta(
 
345
            config[u"approval_duration"])
 
346
        self.changedstate = multiprocessing_manager.Condition(multiprocessing_manager.Lock())
294
347
    
295
 
    def start(self):
 
348
    def send_changedstate(self):
 
349
        self.changedstate.acquire()
 
350
        self.changedstate.notify_all()
 
351
        self.changedstate.release()
 
352
        
 
353
    def enable(self):
296
354
        """Start this client's checker and timeout hooks"""
297
 
        self.last_started = datetime.datetime.utcnow()
 
355
        if getattr(self, u"enabled", False):
 
356
            # Already enabled
 
357
            return
 
358
        self.send_changedstate()
 
359
        self.last_enabled = datetime.datetime.utcnow()
298
360
        # Schedule a new checker to be started an 'interval' from now,
299
361
        # and every interval from then on.
300
362
        self.checker_initiator_tag = (gobject.timeout_add
301
 
                                      (self._interval_milliseconds,
 
363
                                      (self.interval_milliseconds(),
302
364
                                       self.start_checker))
 
365
        # Schedule a disable() when 'timeout' has passed
 
366
        self.disable_initiator_tag = (gobject.timeout_add
 
367
                                   (self.timeout_milliseconds(),
 
368
                                    self.disable))
 
369
        self.enabled = True
303
370
        # Also start a new checker *right now*.
304
371
        self.start_checker()
305
 
        # Schedule a stop() when 'timeout' has passed
306
 
        self.stop_initiator_tag = (gobject.timeout_add
307
 
                                   (self._timeout_milliseconds,
308
 
                                    self.stop))
309
 
        self.started = True
310
 
        # Emit D-Bus signal
311
 
        self.PropertyChanged(dbus.String(u"started"),
312
 
                             dbus.Boolean(True, variant_level=1))
313
 
        self.PropertyChanged(dbus.String(u"last_started"),
314
 
                             (_datetime_to_dbus_struct
315
 
                              (self.last_started, variant_level=1)))
316
372
    
317
 
    def stop(self):
318
 
        """Stop this client."""
319
 
        if not getattr(self, "started", False):
 
373
    def disable(self, quiet=True):
 
374
        """Disable this client."""
 
375
        if not getattr(self, "enabled", False):
320
376
            return False
321
 
        logger.info(u"Stopping client %s", self.name)
322
 
        if getattr(self, "stop_initiator_tag", False):
323
 
            gobject.source_remove(self.stop_initiator_tag)
324
 
            self.stop_initiator_tag = None
325
 
        if getattr(self, "checker_initiator_tag", False):
 
377
        if not quiet:
 
378
            self.send_changedstate()
 
379
        if not quiet:
 
380
            logger.info(u"Disabling client %s", self.name)
 
381
        if getattr(self, u"disable_initiator_tag", False):
 
382
            gobject.source_remove(self.disable_initiator_tag)
 
383
            self.disable_initiator_tag = None
 
384
        if getattr(self, u"checker_initiator_tag", False):
326
385
            gobject.source_remove(self.checker_initiator_tag)
327
386
            self.checker_initiator_tag = None
328
387
        self.stop_checker()
329
 
        if self.stop_hook:
330
 
            self.stop_hook(self)
331
 
        self.started = False
332
 
        # Emit D-Bus signal
333
 
        self.PropertyChanged(dbus.String(u"started"),
334
 
                             dbus.Boolean(False, variant_level=1))
 
388
        if self.disable_hook:
 
389
            self.disable_hook(self)
 
390
        self.enabled = False
335
391
        # Do not run this again if called by a gobject.timeout_add
336
392
        return False
337
393
    
338
394
    def __del__(self):
339
 
        self.stop_hook = None
340
 
        self.stop()
 
395
        self.disable_hook = None
 
396
        self.disable()
341
397
    
342
398
    def checker_callback(self, pid, condition, command):
343
399
        """The checker has completed, so take appropriate actions."""
344
400
        self.checker_callback_tag = None
345
401
        self.checker = None
346
 
        # Emit D-Bus signal
347
 
        self.PropertyChanged(dbus.String(u"checker_running"),
348
 
                             dbus.Boolean(False, variant_level=1))
349
 
        if (os.WIFEXITED(condition)
350
 
            and (os.WEXITSTATUS(condition) == 0)):
351
 
            logger.info(u"Checker for %(name)s succeeded",
352
 
                        vars(self))
353
 
            # Emit D-Bus signal
354
 
            self.CheckerCompleted(dbus.Boolean(True),
355
 
                                  dbus.UInt16(condition),
356
 
                                  dbus.String(command))
357
 
            self.bump_timeout()
358
 
        elif not os.WIFEXITED(condition):
 
402
        if os.WIFEXITED(condition):
 
403
            exitstatus = os.WEXITSTATUS(condition)
 
404
            if exitstatus == 0:
 
405
                logger.info(u"Checker for %(name)s succeeded",
 
406
                            vars(self))
 
407
                self.checked_ok()
 
408
            else:
 
409
                logger.info(u"Checker for %(name)s failed",
 
410
                            vars(self))
 
411
        else:
359
412
            logger.warning(u"Checker for %(name)s crashed?",
360
413
                           vars(self))
361
 
            # Emit D-Bus signal
362
 
            self.CheckerCompleted(dbus.Boolean(False),
363
 
                                  dbus.UInt16(condition),
364
 
                                  dbus.String(command))
365
 
        else:
366
 
            logger.info(u"Checker for %(name)s failed",
367
 
                        vars(self))
368
 
            # Emit D-Bus signal
369
 
            self.CheckerCompleted(dbus.Boolean(False),
370
 
                                  dbus.UInt16(condition),
371
 
                                  dbus.String(command))
372
414
    
373
 
    def bump_timeout(self):
 
415
    def checked_ok(self):
374
416
        """Bump up the timeout for this client.
 
417
        
375
418
        This should only be called when the client has been seen,
376
419
        alive and well.
377
420
        """
378
421
        self.last_checked_ok = datetime.datetime.utcnow()
379
 
        gobject.source_remove(self.stop_initiator_tag)
380
 
        self.stop_initiator_tag = (gobject.timeout_add
381
 
                                   (self._timeout_milliseconds,
382
 
                                    self.stop))
383
 
        self.PropertyChanged(dbus.String(u"last_checked_ok"),
384
 
                             (_datetime_to_dbus_struct
385
 
                              (self.last_checked_ok,
386
 
                               variant_level=1)))
 
422
        gobject.source_remove(self.disable_initiator_tag)
 
423
        self.disable_initiator_tag = (gobject.timeout_add
 
424
                                      (self.timeout_milliseconds(),
 
425
                                       self.disable))
 
426
    
 
427
    def need_approval(self):
 
428
        self.last_approval_request = datetime.datetime.utcnow()
387
429
    
388
430
    def start_checker(self):
389
431
        """Start a new checker subprocess if one is not running.
 
432
        
390
433
        If a checker already exists, leave it running and do
391
434
        nothing."""
392
435
        # The reason for not killing a running checker is that if we
395
438
        # client would inevitably timeout, since no checker would get
396
439
        # a chance to run to completion.  If we instead leave running
397
440
        # checkers alone, the checker would have to take more time
398
 
        # than 'timeout' for the client to be declared invalid, which
399
 
        # is as it should be.
 
441
        # than 'timeout' for the client to be disabled, which is as it
 
442
        # should be.
 
443
        
 
444
        # If a checker exists, make sure it is not a zombie
 
445
        try:
 
446
            pid, status = os.waitpid(self.checker.pid, os.WNOHANG)
 
447
        except (AttributeError, OSError), error:
 
448
            if (isinstance(error, OSError)
 
449
                and error.errno != errno.ECHILD):
 
450
                raise error
 
451
        else:
 
452
            if pid:
 
453
                logger.warning(u"Checker was a zombie")
 
454
                gobject.source_remove(self.checker_callback_tag)
 
455
                self.checker_callback(pid, status,
 
456
                                      self.current_checker_command)
 
457
        # Start a new checker if needed
400
458
        if self.checker is None:
401
459
            try:
402
460
                # In case checker_command has exactly one % operator
403
461
                command = self.checker_command % self.host
404
462
            except TypeError:
405
463
                # Escape attributes for the shell
406
 
                escaped_attrs = dict((key, re.escape(str(val)))
407
 
                                     for key, val in
408
 
                                     vars(self).iteritems())
 
464
                escaped_attrs = dict(
 
465
                    (attr,
 
466
                     re.escape(unicode(str(getattr(self, attr, u"")),
 
467
                                       errors=
 
468
                                       u'replace')))
 
469
                    for attr in
 
470
                    self.runtime_expansions)
 
471
 
409
472
                try:
410
473
                    command = self.checker_command % escaped_attrs
411
474
                except TypeError, error:
412
475
                    logger.error(u'Could not format string "%s":'
413
476
                                 u' %s', self.checker_command, error)
414
477
                    return True # Try again later
 
478
            self.current_checker_command = command
415
479
            try:
416
480
                logger.info(u"Starting checker %r for %s",
417
481
                            command, self.name)
421
485
                # always replaced by /dev/null.)
422
486
                self.checker = subprocess.Popen(command,
423
487
                                                close_fds=True,
424
 
                                                shell=True, cwd="/")
425
 
                # Emit D-Bus signal
426
 
                self.CheckerStarted(command)
427
 
                self.PropertyChanged(dbus.String("checker_running"),
428
 
                                     dbus.Boolean(True, variant_level=1))
 
488
                                                shell=True, cwd=u"/")
429
489
                self.checker_callback_tag = (gobject.child_watch_add
430
490
                                             (self.checker.pid,
431
491
                                              self.checker_callback,
432
492
                                              data=command))
 
493
                # The checker may have completed before the gobject
 
494
                # watch was added.  Check for this.
 
495
                pid, status = os.waitpid(self.checker.pid, os.WNOHANG)
 
496
                if pid:
 
497
                    gobject.source_remove(self.checker_callback_tag)
 
498
                    self.checker_callback(pid, status, command)
433
499
            except OSError, error:
434
500
                logger.error(u"Failed to start subprocess: %s",
435
501
                             error)
441
507
        if self.checker_callback_tag:
442
508
            gobject.source_remove(self.checker_callback_tag)
443
509
            self.checker_callback_tag = None
444
 
        if getattr(self, "checker", None) is None:
 
510
        if getattr(self, u"checker", None) is None:
445
511
            return
446
512
        logger.debug(u"Stopping checker for %(name)s", vars(self))
447
513
        try:
448
514
            os.kill(self.checker.pid, signal.SIGTERM)
449
 
            #os.sleep(0.5)
 
515
            #time.sleep(0.5)
450
516
            #if self.checker.poll() is None:
451
517
            #    os.kill(self.checker.pid, signal.SIGKILL)
452
518
        except OSError, error:
453
519
            if error.errno != errno.ESRCH: # No such process
454
520
                raise
455
521
        self.checker = None
456
 
        self.PropertyChanged(dbus.String(u"checker_running"),
 
522
 
 
523
def dbus_service_property(dbus_interface, signature=u"v",
 
524
                          access=u"readwrite", byte_arrays=False):
 
525
    """Decorators for marking methods of a DBusObjectWithProperties to
 
526
    become properties on the D-Bus.
 
527
    
 
528
    The decorated method will be called with no arguments by "Get"
 
529
    and with one argument by "Set".
 
530
    
 
531
    The parameters, where they are supported, are the same as
 
532
    dbus.service.method, except there is only "signature", since the
 
533
    type from Get() and the type sent to Set() is the same.
 
534
    """
 
535
    # Encoding deeply encoded byte arrays is not supported yet by the
 
536
    # "Set" method, so we fail early here:
 
537
    if byte_arrays and signature != u"ay":
 
538
        raise ValueError(u"Byte arrays not supported for non-'ay'"
 
539
                         u" signature %r" % signature)
 
540
    def decorator(func):
 
541
        func._dbus_is_property = True
 
542
        func._dbus_interface = dbus_interface
 
543
        func._dbus_signature = signature
 
544
        func._dbus_access = access
 
545
        func._dbus_name = func.__name__
 
546
        if func._dbus_name.endswith(u"_dbus_property"):
 
547
            func._dbus_name = func._dbus_name[:-14]
 
548
        func._dbus_get_args_options = {u'byte_arrays': byte_arrays }
 
549
        return func
 
550
    return decorator
 
551
 
 
552
 
 
553
class DBusPropertyException(dbus.exceptions.DBusException):
 
554
    """A base class for D-Bus property-related exceptions
 
555
    """
 
556
    def __unicode__(self):
 
557
        return unicode(str(self))
 
558
 
 
559
 
 
560
class DBusPropertyAccessException(DBusPropertyException):
 
561
    """A property's access permissions disallows an operation.
 
562
    """
 
563
    pass
 
564
 
 
565
 
 
566
class DBusPropertyNotFound(DBusPropertyException):
 
567
    """An attempt was made to access a non-existing property.
 
568
    """
 
569
    pass
 
570
 
 
571
 
 
572
class DBusObjectWithProperties(dbus.service.Object):
 
573
    """A D-Bus object with properties.
 
574
 
 
575
    Classes inheriting from this can use the dbus_service_property
 
576
    decorator to expose methods as D-Bus properties.  It exposes the
 
577
    standard Get(), Set(), and GetAll() methods on the D-Bus.
 
578
    """
 
579
    
 
580
    @staticmethod
 
581
    def _is_dbus_property(obj):
 
582
        return getattr(obj, u"_dbus_is_property", False)
 
583
    
 
584
    def _get_all_dbus_properties(self):
 
585
        """Returns a generator of (name, attribute) pairs
 
586
        """
 
587
        return ((prop._dbus_name, prop)
 
588
                for name, prop in
 
589
                inspect.getmembers(self, self._is_dbus_property))
 
590
    
 
591
    def _get_dbus_property(self, interface_name, property_name):
 
592
        """Returns a bound method if one exists which is a D-Bus
 
593
        property with the specified name and interface.
 
594
        """
 
595
        for name in (property_name,
 
596
                     property_name + u"_dbus_property"):
 
597
            prop = getattr(self, name, None)
 
598
            if (prop is None
 
599
                or not self._is_dbus_property(prop)
 
600
                or prop._dbus_name != property_name
 
601
                or (interface_name and prop._dbus_interface
 
602
                    and interface_name != prop._dbus_interface)):
 
603
                continue
 
604
            return prop
 
605
        # No such property
 
606
        raise DBusPropertyNotFound(self.dbus_object_path + u":"
 
607
                                   + interface_name + u"."
 
608
                                   + property_name)
 
609
    
 
610
    @dbus.service.method(dbus.PROPERTIES_IFACE, in_signature=u"ss",
 
611
                         out_signature=u"v")
 
612
    def Get(self, interface_name, property_name):
 
613
        """Standard D-Bus property Get() method, see D-Bus standard.
 
614
        """
 
615
        prop = self._get_dbus_property(interface_name, property_name)
 
616
        if prop._dbus_access == u"write":
 
617
            raise DBusPropertyAccessException(property_name)
 
618
        value = prop()
 
619
        if not hasattr(value, u"variant_level"):
 
620
            return value
 
621
        return type(value)(value, variant_level=value.variant_level+1)
 
622
    
 
623
    @dbus.service.method(dbus.PROPERTIES_IFACE, in_signature=u"ssv")
 
624
    def Set(self, interface_name, property_name, value):
 
625
        """Standard D-Bus property Set() method, see D-Bus standard.
 
626
        """
 
627
        prop = self._get_dbus_property(interface_name, property_name)
 
628
        if prop._dbus_access == u"read":
 
629
            raise DBusPropertyAccessException(property_name)
 
630
        if prop._dbus_get_args_options[u"byte_arrays"]:
 
631
            # The byte_arrays option is not supported yet on
 
632
            # signatures other than "ay".
 
633
            if prop._dbus_signature != u"ay":
 
634
                raise ValueError
 
635
            value = dbus.ByteArray(''.join(unichr(byte)
 
636
                                           for byte in value))
 
637
        prop(value)
 
638
    
 
639
    @dbus.service.method(dbus.PROPERTIES_IFACE, in_signature=u"s",
 
640
                         out_signature=u"a{sv}")
 
641
    def GetAll(self, interface_name):
 
642
        """Standard D-Bus property GetAll() method, see D-Bus
 
643
        standard.
 
644
 
 
645
        Note: Will not include properties with access="write".
 
646
        """
 
647
        all = {}
 
648
        for name, prop in self._get_all_dbus_properties():
 
649
            if (interface_name
 
650
                and interface_name != prop._dbus_interface):
 
651
                # Interface non-empty but did not match
 
652
                continue
 
653
            # Ignore write-only properties
 
654
            if prop._dbus_access == u"write":
 
655
                continue
 
656
            value = prop()
 
657
            if not hasattr(value, u"variant_level"):
 
658
                all[name] = value
 
659
                continue
 
660
            all[name] = type(value)(value, variant_level=
 
661
                                    value.variant_level+1)
 
662
        return dbus.Dictionary(all, signature=u"sv")
 
663
    
 
664
    @dbus.service.method(dbus.INTROSPECTABLE_IFACE,
 
665
                         out_signature=u"s",
 
666
                         path_keyword='object_path',
 
667
                         connection_keyword='connection')
 
668
    def Introspect(self, object_path, connection):
 
669
        """Standard D-Bus method, overloaded to insert property tags.
 
670
        """
 
671
        xmlstring = dbus.service.Object.Introspect(self, object_path,
 
672
                                                   connection)
 
673
        try:
 
674
            document = xml.dom.minidom.parseString(xmlstring)
 
675
            def make_tag(document, name, prop):
 
676
                e = document.createElement(u"property")
 
677
                e.setAttribute(u"name", name)
 
678
                e.setAttribute(u"type", prop._dbus_signature)
 
679
                e.setAttribute(u"access", prop._dbus_access)
 
680
                return e
 
681
            for if_tag in document.getElementsByTagName(u"interface"):
 
682
                for tag in (make_tag(document, name, prop)
 
683
                            for name, prop
 
684
                            in self._get_all_dbus_properties()
 
685
                            if prop._dbus_interface
 
686
                            == if_tag.getAttribute(u"name")):
 
687
                    if_tag.appendChild(tag)
 
688
                # Add the names to the return values for the
 
689
                # "org.freedesktop.DBus.Properties" methods
 
690
                if (if_tag.getAttribute(u"name")
 
691
                    == u"org.freedesktop.DBus.Properties"):
 
692
                    for cn in if_tag.getElementsByTagName(u"method"):
 
693
                        if cn.getAttribute(u"name") == u"Get":
 
694
                            for arg in cn.getElementsByTagName(u"arg"):
 
695
                                if (arg.getAttribute(u"direction")
 
696
                                    == u"out"):
 
697
                                    arg.setAttribute(u"name", u"value")
 
698
                        elif cn.getAttribute(u"name") == u"GetAll":
 
699
                            for arg in cn.getElementsByTagName(u"arg"):
 
700
                                if (arg.getAttribute(u"direction")
 
701
                                    == u"out"):
 
702
                                    arg.setAttribute(u"name", u"props")
 
703
            xmlstring = document.toxml(u"utf-8")
 
704
            document.unlink()
 
705
        except (AttributeError, xml.dom.DOMException,
 
706
                xml.parsers.expat.ExpatError), error:
 
707
            logger.error(u"Failed to override Introspection method",
 
708
                         error)
 
709
        return xmlstring
 
710
 
 
711
 
 
712
class ClientDBus(Client, DBusObjectWithProperties):
 
713
    """A Client class using D-Bus
 
714
    
 
715
    Attributes:
 
716
    dbus_object_path: dbus.ObjectPath
 
717
    bus: dbus.SystemBus()
 
718
    """
 
719
    
 
720
    runtime_expansions = (Client.runtime_expansions
 
721
                          + (u"dbus_object_path",))
 
722
    
 
723
    # dbus.service.Object doesn't use super(), so we can't either.
 
724
    
 
725
    def __init__(self, bus = None, *args, **kwargs):
 
726
        self._approvals_pending = 0
 
727
        self.bus = bus
 
728
        Client.__init__(self, *args, **kwargs)
 
729
        # Only now, when this client is initialized, can it show up on
 
730
        # the D-Bus
 
731
        client_object_name = unicode(self.name).translate(
 
732
            {ord(u"."): ord(u"_"),
 
733
             ord(u"-"): ord(u"_")})
 
734
        self.dbus_object_path = (dbus.ObjectPath
 
735
                                 (u"/clients/" + client_object_name))
 
736
        DBusObjectWithProperties.__init__(self, self.bus,
 
737
                                          self.dbus_object_path)
 
738
        
 
739
    def _get_approvals_pending(self):
 
740
        return self._approvals_pending
 
741
    def _set_approvals_pending(self, value):
 
742
        old_value = self._approvals_pending
 
743
        self._approvals_pending = value
 
744
        bval = bool(value)
 
745
        if (hasattr(self, "dbus_object_path")
 
746
            and bval is not bool(old_value)):
 
747
            dbus_bool = dbus.Boolean(bval, variant_level=1)
 
748
            self.PropertyChanged(dbus.String(u"ApprovalPending"),
 
749
                                 dbus_bool)
 
750
 
 
751
    approvals_pending = property(_get_approvals_pending,
 
752
                                 _set_approvals_pending)
 
753
    del _get_approvals_pending, _set_approvals_pending
 
754
    
 
755
    @staticmethod
 
756
    def _datetime_to_dbus(dt, variant_level=0):
 
757
        """Convert a UTC datetime.datetime() to a D-Bus type."""
 
758
        return dbus.String(dt.isoformat(),
 
759
                           variant_level=variant_level)
 
760
    
 
761
    def enable(self):
 
762
        oldstate = getattr(self, u"enabled", False)
 
763
        r = Client.enable(self)
 
764
        if oldstate != self.enabled:
 
765
            # Emit D-Bus signals
 
766
            self.PropertyChanged(dbus.String(u"Enabled"),
 
767
                                 dbus.Boolean(True, variant_level=1))
 
768
            self.PropertyChanged(
 
769
                dbus.String(u"LastEnabled"),
 
770
                self._datetime_to_dbus(self.last_enabled,
 
771
                                       variant_level=1))
 
772
        return r
 
773
    
 
774
    def disable(self, quiet = False):
 
775
        oldstate = getattr(self, u"enabled", False)
 
776
        r = Client.disable(self, quiet=quiet)
 
777
        if not quiet and oldstate != self.enabled:
 
778
            # Emit D-Bus signal
 
779
            self.PropertyChanged(dbus.String(u"Enabled"),
 
780
                                 dbus.Boolean(False, variant_level=1))
 
781
        return r
 
782
    
 
783
    def __del__(self, *args, **kwargs):
 
784
        try:
 
785
            self.remove_from_connection()
 
786
        except LookupError:
 
787
            pass
 
788
        if hasattr(DBusObjectWithProperties, u"__del__"):
 
789
            DBusObjectWithProperties.__del__(self, *args, **kwargs)
 
790
        Client.__del__(self, *args, **kwargs)
 
791
    
 
792
    def checker_callback(self, pid, condition, command,
 
793
                         *args, **kwargs):
 
794
        self.checker_callback_tag = None
 
795
        self.checker = None
 
796
        # Emit D-Bus signal
 
797
        self.PropertyChanged(dbus.String(u"CheckerRunning"),
457
798
                             dbus.Boolean(False, variant_level=1))
458
 
    
459
 
    def still_valid(self):
460
 
        """Has the timeout not yet passed for this client?"""
461
 
        if not getattr(self, "started", False):
462
 
            return False
463
 
        now = datetime.datetime.utcnow()
464
 
        if self.last_checked_ok is None:
465
 
            return now < (self.created + self.timeout)
466
 
        else:
467
 
            return now < (self.last_checked_ok + self.timeout)
468
 
    
469
 
    ## D-Bus methods & signals
470
 
    _interface = u"org.mandos_system.Mandos.Client"
471
 
    
472
 
    # BumpTimeout - method
473
 
    BumpTimeout = dbus.service.method(_interface)(bump_timeout)
474
 
    BumpTimeout.__name__ = "BumpTimeout"
 
799
        if os.WIFEXITED(condition):
 
800
            exitstatus = os.WEXITSTATUS(condition)
 
801
            # Emit D-Bus signal
 
802
            self.CheckerCompleted(dbus.Int16(exitstatus),
 
803
                                  dbus.Int64(condition),
 
804
                                  dbus.String(command))
 
805
        else:
 
806
            # Emit D-Bus signal
 
807
            self.CheckerCompleted(dbus.Int16(-1),
 
808
                                  dbus.Int64(condition),
 
809
                                  dbus.String(command))
 
810
        
 
811
        return Client.checker_callback(self, pid, condition, command,
 
812
                                       *args, **kwargs)
 
813
    
 
814
    def checked_ok(self, *args, **kwargs):
 
815
        r = Client.checked_ok(self, *args, **kwargs)
 
816
        # Emit D-Bus signal
 
817
        self.PropertyChanged(
 
818
            dbus.String(u"LastCheckedOK"),
 
819
            (self._datetime_to_dbus(self.last_checked_ok,
 
820
                                    variant_level=1)))
 
821
        return r
 
822
    
 
823
    def need_approval(self, *args, **kwargs):
 
824
        r = Client.need_approval(self, *args, **kwargs)
 
825
        # Emit D-Bus signal
 
826
        self.PropertyChanged(
 
827
            dbus.String(u"LastApprovalRequest"),
 
828
            (self._datetime_to_dbus(self.last_approval_request,
 
829
                                    variant_level=1)))
 
830
        return r
 
831
    
 
832
    def start_checker(self, *args, **kwargs):
 
833
        old_checker = self.checker
 
834
        if self.checker is not None:
 
835
            old_checker_pid = self.checker.pid
 
836
        else:
 
837
            old_checker_pid = None
 
838
        r = Client.start_checker(self, *args, **kwargs)
 
839
        # Only if new checker process was started
 
840
        if (self.checker is not None
 
841
            and old_checker_pid != self.checker.pid):
 
842
            # Emit D-Bus signal
 
843
            self.CheckerStarted(self.current_checker_command)
 
844
            self.PropertyChanged(
 
845
                dbus.String(u"CheckerRunning"),
 
846
                dbus.Boolean(True, variant_level=1))
 
847
        return r
 
848
    
 
849
    def stop_checker(self, *args, **kwargs):
 
850
        old_checker = getattr(self, u"checker", None)
 
851
        r = Client.stop_checker(self, *args, **kwargs)
 
852
        if (old_checker is not None
 
853
            and getattr(self, u"checker", None) is None):
 
854
            self.PropertyChanged(dbus.String(u"CheckerRunning"),
 
855
                                 dbus.Boolean(False, variant_level=1))
 
856
        return r
 
857
 
 
858
    def _reset_approved(self):
 
859
        self._approved = None
 
860
        return False
 
861
    
 
862
    def approve(self, value=True):
 
863
        self.send_changedstate()
 
864
        self._approved = value
 
865
        gobject.timeout_add(self._timedelta_to_milliseconds
 
866
                            (self.approval_duration),
 
867
                            self._reset_approved)
 
868
    
 
869
    
 
870
    ## D-Bus methods, signals & properties
 
871
    _interface = u"se.bsnet.fukt.Mandos.Client"
 
872
    
 
873
    ## Signals
475
874
    
476
875
    # CheckerCompleted - signal
477
 
    @dbus.service.signal(_interface, signature="bqs")
478
 
    def CheckerCompleted(self, success, condition, command):
 
876
    @dbus.service.signal(_interface, signature=u"nxs")
 
877
    def CheckerCompleted(self, exitcode, waitstatus, command):
479
878
        "D-Bus signal"
480
879
        pass
481
880
    
482
881
    # CheckerStarted - signal
483
 
    @dbus.service.signal(_interface, signature="s")
 
882
    @dbus.service.signal(_interface, signature=u"s")
484
883
    def CheckerStarted(self, command):
485
884
        "D-Bus signal"
486
885
        pass
487
886
    
488
 
    # GetAllProperties - method
489
 
    @dbus.service.method(_interface, out_signature="a{sv}")
490
 
    def GetAllProperties(self):
491
 
        "D-Bus method"
492
 
        return dbus.Dictionary({
493
 
                dbus.String("name"):
494
 
                    dbus.String(self.name, variant_level=1),
495
 
                dbus.String("fingerprint"):
496
 
                    dbus.String(self.fingerprint, variant_level=1),
497
 
                dbus.String("host"):
498
 
                    dbus.String(self.host, variant_level=1),
499
 
                dbus.String("created"):
500
 
                    _datetime_to_dbus_struct(self.created,
501
 
                                             variant_level=1),
502
 
                dbus.String("last_started"):
503
 
                    (_datetime_to_dbus_struct(self.last_started,
504
 
                                              variant_level=1)
505
 
                     if self.last_started is not None
506
 
                     else dbus.Boolean(False, variant_level=1)),
507
 
                dbus.String("started"):
508
 
                    dbus.Boolean(self.started, variant_level=1),
509
 
                dbus.String("last_checked_ok"):
510
 
                    (_datetime_to_dbus_struct(self.last_checked_ok,
511
 
                                              variant_level=1)
512
 
                     if self.last_checked_ok is not None
513
 
                     else dbus.Boolean (False, variant_level=1)),
514
 
                dbus.String("timeout"):
515
 
                    dbus.UInt64(self._timeout_milliseconds,
516
 
                                variant_level=1),
517
 
                dbus.String("interval"):
518
 
                    dbus.UInt64(self._interval_milliseconds,
519
 
                                variant_level=1),
520
 
                dbus.String("checker"):
521
 
                    dbus.String(self.checker_command,
522
 
                                variant_level=1),
523
 
                dbus.String("checker_running"):
524
 
                    dbus.Boolean(self.checker is not None,
525
 
                                 variant_level=1),
526
 
                }, signature="sv")
527
 
    
528
 
    # IsStillValid - method
529
 
    IsStillValid = (dbus.service.method(_interface, out_signature="b")
530
 
                    (still_valid))
531
 
    IsStillValid.__name__ = "IsStillValid"
532
 
    
533
887
    # PropertyChanged - signal
534
 
    @dbus.service.signal(_interface, signature="sv")
 
888
    @dbus.service.signal(_interface, signature=u"sv")
535
889
    def PropertyChanged(self, property, value):
536
890
        "D-Bus signal"
537
891
        pass
538
892
    
539
 
    # SetChecker - method
540
 
    @dbus.service.method(_interface, in_signature="s")
541
 
    def SetChecker(self, checker):
542
 
        "D-Bus setter method"
543
 
        self.checker_command = checker
544
 
    
545
 
    # SetHost - method
546
 
    @dbus.service.method(_interface, in_signature="s")
547
 
    def SetHost(self, host):
548
 
        "D-Bus setter method"
549
 
        self.host = host
550
 
    
551
 
    # SetInterval - method
552
 
    @dbus.service.method(_interface, in_signature="t")
553
 
    def SetInterval(self, milliseconds):
554
 
        self.interval = datetime.timdeelta(0, 0, 0, milliseconds)
555
 
    
556
 
    # SetSecret - method
557
 
    @dbus.service.method(_interface, in_signature="ay",
558
 
                         byte_arrays=True)
559
 
    def SetSecret(self, secret):
560
 
        "D-Bus setter method"
561
 
        self.secret = str(secret)
562
 
    
563
 
    # SetTimeout - method
564
 
    @dbus.service.method(_interface, in_signature="t")
565
 
    def SetTimeout(self, milliseconds):
566
 
        self.timeout = datetime.timedelta(0, 0, 0, milliseconds)
567
 
    
568
 
    # Start - method
569
 
    Start = dbus.service.method(_interface)(start)
570
 
    Start.__name__ = "Start"
 
893
    # GotSecret - signal
 
894
    @dbus.service.signal(_interface)
 
895
    def GotSecret(self):
 
896
        """D-Bus signal
 
897
        Is sent after a successful transfer of secret from the Mandos
 
898
        server to mandos-client
 
899
        """
 
900
        pass
 
901
    
 
902
    # Rejected - signal
 
903
    @dbus.service.signal(_interface, signature=u"s")
 
904
    def Rejected(self, reason):
 
905
        "D-Bus signal"
 
906
        pass
 
907
    
 
908
    # NeedApproval - signal
 
909
    @dbus.service.signal(_interface, signature=u"tb")
 
910
    def NeedApproval(self, timeout, default):
 
911
        "D-Bus signal"
 
912
        return self.need_approval()
 
913
    
 
914
    ## Methods
 
915
    
 
916
    # Approve - method
 
917
    @dbus.service.method(_interface, in_signature=u"b")
 
918
    def Approve(self, value):
 
919
        self.approve(value)
 
920
    
 
921
    # CheckedOK - method
 
922
    @dbus.service.method(_interface)
 
923
    def CheckedOK(self):
 
924
        return self.checked_ok()
 
925
    
 
926
    # Enable - method
 
927
    @dbus.service.method(_interface)
 
928
    def Enable(self):
 
929
        "D-Bus method"
 
930
        self.enable()
571
931
    
572
932
    # StartChecker - method
573
933
    @dbus.service.method(_interface)
575
935
        "D-Bus method"
576
936
        self.start_checker()
577
937
    
578
 
    # Stop - method
 
938
    # Disable - method
579
939
    @dbus.service.method(_interface)
580
 
    def Stop(self):
 
940
    def Disable(self):
581
941
        "D-Bus method"
582
 
        self.stop()
 
942
        self.disable()
583
943
    
584
944
    # StopChecker - method
585
 
    StopChecker = dbus.service.method(_interface)(stop_checker)
586
 
    StopChecker.__name__ = "StopChecker"
 
945
    @dbus.service.method(_interface)
 
946
    def StopChecker(self):
 
947
        self.stop_checker()
 
948
    
 
949
    ## Properties
 
950
    
 
951
    # ApprovalPending - property
 
952
    @dbus_service_property(_interface, signature=u"b", access=u"read")
 
953
    def ApprovalPending_dbus_property(self):
 
954
        return dbus.Boolean(bool(self.approvals_pending))
 
955
    
 
956
    # ApprovedByDefault - property
 
957
    @dbus_service_property(_interface, signature=u"b",
 
958
                           access=u"readwrite")
 
959
    def ApprovedByDefault_dbus_property(self, value=None):
 
960
        if value is None:       # get
 
961
            return dbus.Boolean(self.approved_by_default)
 
962
        self.approved_by_default = bool(value)
 
963
        # Emit D-Bus signal
 
964
        self.PropertyChanged(dbus.String(u"ApprovedByDefault"),
 
965
                             dbus.Boolean(value, variant_level=1))
 
966
    
 
967
    # ApprovalDelay - property
 
968
    @dbus_service_property(_interface, signature=u"t",
 
969
                           access=u"readwrite")
 
970
    def ApprovalDelay_dbus_property(self, value=None):
 
971
        if value is None:       # get
 
972
            return dbus.UInt64(self.approval_delay_milliseconds())
 
973
        self.approval_delay = datetime.timedelta(0, 0, 0, value)
 
974
        # Emit D-Bus signal
 
975
        self.PropertyChanged(dbus.String(u"ApprovalDelay"),
 
976
                             dbus.UInt64(value, variant_level=1))
 
977
    
 
978
    # ApprovalDuration - property
 
979
    @dbus_service_property(_interface, signature=u"t",
 
980
                           access=u"readwrite")
 
981
    def ApprovalDuration_dbus_property(self, value=None):
 
982
        if value is None:       # get
 
983
            return dbus.UInt64(self._timedelta_to_milliseconds(
 
984
                    self.approval_duration))
 
985
        self.approval_duration = datetime.timedelta(0, 0, 0, value)
 
986
        # Emit D-Bus signal
 
987
        self.PropertyChanged(dbus.String(u"ApprovalDuration"),
 
988
                             dbus.UInt64(value, variant_level=1))
 
989
    
 
990
    # Name - property
 
991
    @dbus_service_property(_interface, signature=u"s", access=u"read")
 
992
    def Name_dbus_property(self):
 
993
        return dbus.String(self.name)
 
994
    
 
995
    # Fingerprint - property
 
996
    @dbus_service_property(_interface, signature=u"s", access=u"read")
 
997
    def Fingerprint_dbus_property(self):
 
998
        return dbus.String(self.fingerprint)
 
999
    
 
1000
    # Host - property
 
1001
    @dbus_service_property(_interface, signature=u"s",
 
1002
                           access=u"readwrite")
 
1003
    def Host_dbus_property(self, value=None):
 
1004
        if value is None:       # get
 
1005
            return dbus.String(self.host)
 
1006
        self.host = value
 
1007
        # Emit D-Bus signal
 
1008
        self.PropertyChanged(dbus.String(u"Host"),
 
1009
                             dbus.String(value, variant_level=1))
 
1010
    
 
1011
    # Created - property
 
1012
    @dbus_service_property(_interface, signature=u"s", access=u"read")
 
1013
    def Created_dbus_property(self):
 
1014
        return dbus.String(self._datetime_to_dbus(self.created))
 
1015
    
 
1016
    # LastEnabled - property
 
1017
    @dbus_service_property(_interface, signature=u"s", access=u"read")
 
1018
    def LastEnabled_dbus_property(self):
 
1019
        if self.last_enabled is None:
 
1020
            return dbus.String(u"")
 
1021
        return dbus.String(self._datetime_to_dbus(self.last_enabled))
 
1022
    
 
1023
    # Enabled - property
 
1024
    @dbus_service_property(_interface, signature=u"b",
 
1025
                           access=u"readwrite")
 
1026
    def Enabled_dbus_property(self, value=None):
 
1027
        if value is None:       # get
 
1028
            return dbus.Boolean(self.enabled)
 
1029
        if value:
 
1030
            self.enable()
 
1031
        else:
 
1032
            self.disable()
 
1033
    
 
1034
    # LastCheckedOK - property
 
1035
    @dbus_service_property(_interface, signature=u"s",
 
1036
                           access=u"readwrite")
 
1037
    def LastCheckedOK_dbus_property(self, value=None):
 
1038
        if value is not None:
 
1039
            self.checked_ok()
 
1040
            return
 
1041
        if self.last_checked_ok is None:
 
1042
            return dbus.String(u"")
 
1043
        return dbus.String(self._datetime_to_dbus(self
 
1044
                                                  .last_checked_ok))
 
1045
    
 
1046
    # LastApprovalRequest - property
 
1047
    @dbus_service_property(_interface, signature=u"s", access=u"read")
 
1048
    def LastApprovalRequest_dbus_property(self):
 
1049
        if self.last_approval_request is None:
 
1050
            return dbus.String(u"")
 
1051
        return dbus.String(self.
 
1052
                           _datetime_to_dbus(self
 
1053
                                             .last_approval_request))
 
1054
    
 
1055
    # Timeout - property
 
1056
    @dbus_service_property(_interface, signature=u"t",
 
1057
                           access=u"readwrite")
 
1058
    def Timeout_dbus_property(self, value=None):
 
1059
        if value is None:       # get
 
1060
            return dbus.UInt64(self.timeout_milliseconds())
 
1061
        self.timeout = datetime.timedelta(0, 0, 0, value)
 
1062
        # Emit D-Bus signal
 
1063
        self.PropertyChanged(dbus.String(u"Timeout"),
 
1064
                             dbus.UInt64(value, variant_level=1))
 
1065
        if getattr(self, u"disable_initiator_tag", None) is None:
 
1066
            return
 
1067
        # Reschedule timeout
 
1068
        gobject.source_remove(self.disable_initiator_tag)
 
1069
        self.disable_initiator_tag = None
 
1070
        time_to_die = (self.
 
1071
                       _timedelta_to_milliseconds((self
 
1072
                                                   .last_checked_ok
 
1073
                                                   + self.timeout)
 
1074
                                                  - datetime.datetime
 
1075
                                                  .utcnow()))
 
1076
        if time_to_die <= 0:
 
1077
            # The timeout has passed
 
1078
            self.disable()
 
1079
        else:
 
1080
            self.disable_initiator_tag = (gobject.timeout_add
 
1081
                                          (time_to_die, self.disable))
 
1082
    
 
1083
    # Interval - property
 
1084
    @dbus_service_property(_interface, signature=u"t",
 
1085
                           access=u"readwrite")
 
1086
    def Interval_dbus_property(self, value=None):
 
1087
        if value is None:       # get
 
1088
            return dbus.UInt64(self.interval_milliseconds())
 
1089
        self.interval = datetime.timedelta(0, 0, 0, value)
 
1090
        # Emit D-Bus signal
 
1091
        self.PropertyChanged(dbus.String(u"Interval"),
 
1092
                             dbus.UInt64(value, variant_level=1))
 
1093
        if getattr(self, u"checker_initiator_tag", None) is None:
 
1094
            return
 
1095
        # Reschedule checker run
 
1096
        gobject.source_remove(self.checker_initiator_tag)
 
1097
        self.checker_initiator_tag = (gobject.timeout_add
 
1098
                                      (value, self.start_checker))
 
1099
        self.start_checker()    # Start one now, too
 
1100
 
 
1101
    # Checker - property
 
1102
    @dbus_service_property(_interface, signature=u"s",
 
1103
                           access=u"readwrite")
 
1104
    def Checker_dbus_property(self, value=None):
 
1105
        if value is None:       # get
 
1106
            return dbus.String(self.checker_command)
 
1107
        self.checker_command = value
 
1108
        # Emit D-Bus signal
 
1109
        self.PropertyChanged(dbus.String(u"Checker"),
 
1110
                             dbus.String(self.checker_command,
 
1111
                                         variant_level=1))
 
1112
    
 
1113
    # CheckerRunning - property
 
1114
    @dbus_service_property(_interface, signature=u"b",
 
1115
                           access=u"readwrite")
 
1116
    def CheckerRunning_dbus_property(self, value=None):
 
1117
        if value is None:       # get
 
1118
            return dbus.Boolean(self.checker is not None)
 
1119
        if value:
 
1120
            self.start_checker()
 
1121
        else:
 
1122
            self.stop_checker()
 
1123
    
 
1124
    # ObjectPath - property
 
1125
    @dbus_service_property(_interface, signature=u"o", access=u"read")
 
1126
    def ObjectPath_dbus_property(self):
 
1127
        return self.dbus_object_path # is already a dbus.ObjectPath
 
1128
    
 
1129
    # Secret = property
 
1130
    @dbus_service_property(_interface, signature=u"ay",
 
1131
                           access=u"write", byte_arrays=True)
 
1132
    def Secret_dbus_property(self, value):
 
1133
        self.secret = str(value)
587
1134
    
588
1135
    del _interface
589
1136
 
590
1137
 
591
 
def peer_certificate(session):
592
 
    "Return the peer's OpenPGP certificate as a bytestring"
593
 
    # If not an OpenPGP certificate...
594
 
    if (gnutls.library.functions
595
 
        .gnutls_certificate_type_get(session._c_object)
596
 
        != gnutls.library.constants.GNUTLS_CRT_OPENPGP):
597
 
        # ...do the normal thing
598
 
        return session.peer_certificate
599
 
    list_size = ctypes.c_uint()
600
 
    cert_list = (gnutls.library.functions
601
 
                 .gnutls_certificate_get_peers
602
 
                 (session._c_object, ctypes.byref(list_size)))
603
 
    if list_size.value == 0:
604
 
        return None
605
 
    cert = cert_list[0]
606
 
    return ctypes.string_at(cert.data, cert.size)
607
 
 
608
 
 
609
 
def fingerprint(openpgp):
610
 
    "Convert an OpenPGP bytestring to a hexdigit fingerprint string"
611
 
    # New GnuTLS "datum" with the OpenPGP public key
612
 
    datum = (gnutls.library.types
613
 
             .gnutls_datum_t(ctypes.cast(ctypes.c_char_p(openpgp),
614
 
                                         ctypes.POINTER
615
 
                                         (ctypes.c_ubyte)),
616
 
                             ctypes.c_uint(len(openpgp))))
617
 
    # New empty GnuTLS certificate
618
 
    crt = gnutls.library.types.gnutls_openpgp_crt_t()
619
 
    (gnutls.library.functions
620
 
     .gnutls_openpgp_crt_init(ctypes.byref(crt)))
621
 
    # Import the OpenPGP public key into the certificate
622
 
    (gnutls.library.functions
623
 
     .gnutls_openpgp_crt_import(crt, ctypes.byref(datum),
624
 
                                gnutls.library.constants
625
 
                                .GNUTLS_OPENPGP_FMT_RAW))
626
 
    # Verify the self signature in the key
627
 
    crtverify = ctypes.c_uint()
628
 
    (gnutls.library.functions
629
 
     .gnutls_openpgp_crt_verify_self(crt, 0, ctypes.byref(crtverify)))
630
 
    if crtverify.value != 0:
631
 
        gnutls.library.functions.gnutls_openpgp_crt_deinit(crt)
632
 
        raise gnutls.errors.CertificateSecurityError("Verify failed")
633
 
    # New buffer for the fingerprint
634
 
    buf = ctypes.create_string_buffer(20)
635
 
    buf_len = ctypes.c_size_t()
636
 
    # Get the fingerprint from the certificate into the buffer
637
 
    (gnutls.library.functions
638
 
     .gnutls_openpgp_crt_get_fingerprint(crt, ctypes.byref(buf),
639
 
                                         ctypes.byref(buf_len)))
640
 
    # Deinit the certificate
641
 
    gnutls.library.functions.gnutls_openpgp_crt_deinit(crt)
642
 
    # Convert the buffer to a Python bytestring
643
 
    fpr = ctypes.string_at(buf, buf_len.value)
644
 
    # Convert the bytestring to hexadecimal notation
645
 
    hex_fpr = u''.join(u"%02X" % ord(char) for char in fpr)
646
 
    return hex_fpr
647
 
 
648
 
 
649
 
class TCP_handler(SocketServer.BaseRequestHandler, object):
650
 
    """A TCP request handler class.
651
 
    Instantiated by IPv6_TCPServer for each request to handle it.
 
1138
class ProxyClient(object):
 
1139
    def __init__(self, child_pipe, fpr, address):
 
1140
        self._pipe = child_pipe
 
1141
        self._pipe.send(('init', fpr, address))
 
1142
        if not self._pipe.recv():
 
1143
            raise KeyError()
 
1144
 
 
1145
    def __getattribute__(self, name):
 
1146
        if(name == '_pipe'):
 
1147
            return super(ProxyClient, self).__getattribute__(name)
 
1148
        self._pipe.send(('getattr', name))
 
1149
        data = self._pipe.recv()
 
1150
        if data[0] == 'data':
 
1151
            return data[1]
 
1152
        if data[0] == 'function':
 
1153
            def func(*args, **kwargs):
 
1154
                self._pipe.send(('funcall', name, args, kwargs))
 
1155
                return self._pipe.recv()[1]
 
1156
            return func
 
1157
 
 
1158
    def __setattr__(self, name, value):
 
1159
        if(name == '_pipe'):
 
1160
            return super(ProxyClient, self).__setattr__(name, value)
 
1161
        self._pipe.send(('setattr', name, value))
 
1162
 
 
1163
 
 
1164
class ClientHandler(socketserver.BaseRequestHandler, object):
 
1165
    """A class to handle client connections.
 
1166
    
 
1167
    Instantiated once for each connection to handle it.
652
1168
    Note: This will run in its own forked process."""
653
1169
    
654
1170
    def handle(self):
655
 
        logger.info(u"TCP connection from: %s",
656
 
                    unicode(self.client_address))
657
 
        session = (gnutls.connection
658
 
                   .ClientSession(self.request,
659
 
                                  gnutls.connection
660
 
                                  .X509Credentials()))
661
 
        
662
 
        line = self.request.makefile().readline()
663
 
        logger.debug(u"Protocol version: %r", line)
664
 
        try:
665
 
            if int(line.strip().split()[0]) > 1:
666
 
                raise RuntimeError
667
 
        except (ValueError, IndexError, RuntimeError), error:
668
 
            logger.error(u"Unknown protocol version: %s", error)
669
 
            return
670
 
        
671
 
        # Note: gnutls.connection.X509Credentials is really a generic
672
 
        # GnuTLS certificate credentials object so long as no X.509
673
 
        # keys are added to it.  Therefore, we can use it here despite
674
 
        # using OpenPGP certificates.
675
 
        
676
 
        #priority = ':'.join(("NONE", "+VERS-TLS1.1", "+AES-256-CBC",
677
 
        #                "+SHA1", "+COMP-NULL", "+CTYPE-OPENPGP",
678
 
        #                "+DHE-DSS"))
679
 
        # Use a fallback default, since this MUST be set.
680
 
        priority = self.server.settings.get("priority", "NORMAL")
681
 
        (gnutls.library.functions
682
 
         .gnutls_priority_set_direct(session._c_object,
683
 
                                     priority, None))
684
 
        
685
 
        try:
686
 
            session.handshake()
687
 
        except gnutls.errors.GNUTLSError, error:
688
 
            logger.warning(u"Handshake failed: %s", error)
689
 
            # Do not run session.bye() here: the session is not
690
 
            # established.  Just abandon the request.
691
 
            return
692
 
        try:
693
 
            fpr = fingerprint(peer_certificate(session))
694
 
        except (TypeError, gnutls.errors.GNUTLSError), error:
695
 
            logger.warning(u"Bad certificate: %s", error)
696
 
            session.bye()
697
 
            return
698
 
        logger.debug(u"Fingerprint: %s", fpr)
699
 
        for c in self.server.clients:
700
 
            if c.fingerprint == fpr:
701
 
                client = c
702
 
                break
703
 
        else:
704
 
            logger.warning(u"Client not found for fingerprint: %s",
705
 
                           fpr)
706
 
            session.bye()
707
 
            return
708
 
        # Have to check if client.still_valid(), since it is possible
709
 
        # that the client timed out while establishing the GnuTLS
710
 
        # session.
711
 
        if not client.still_valid():
712
 
            logger.warning(u"Client %(name)s is invalid",
713
 
                           vars(client))
714
 
            session.bye()
715
 
            return
716
 
        ## This won't work here, since we're in a fork.
717
 
        # client.bump_timeout()
718
 
        sent_size = 0
719
 
        while sent_size < len(client.secret):
720
 
            sent = session.send(client.secret[sent_size:])
721
 
            logger.debug(u"Sent: %d, remaining: %d",
722
 
                         sent, len(client.secret)
723
 
                         - (sent_size + sent))
724
 
            sent_size += sent
725
 
        session.bye()
726
 
 
727
 
 
728
 
class IPv6_TCPServer(SocketServer.ForkingMixIn,
729
 
                     SocketServer.TCPServer, object):
730
 
    """IPv6 TCP server.  Accepts 'None' as address and/or port.
 
1171
        with contextlib.closing(self.server.child_pipe) as child_pipe:
 
1172
            logger.info(u"TCP connection from: %s",
 
1173
                        unicode(self.client_address))
 
1174
            logger.debug(u"Pipe FD: %d",
 
1175
                         self.server.child_pipe.fileno())
 
1176
 
 
1177
            session = (gnutls.connection
 
1178
                       .ClientSession(self.request,
 
1179
                                      gnutls.connection
 
1180
                                      .X509Credentials()))
 
1181
 
 
1182
            # Note: gnutls.connection.X509Credentials is really a
 
1183
            # generic GnuTLS certificate credentials object so long as
 
1184
            # no X.509 keys are added to it.  Therefore, we can use it
 
1185
            # here despite using OpenPGP certificates.
 
1186
 
 
1187
            #priority = u':'.join((u"NONE", u"+VERS-TLS1.1",
 
1188
            #                      u"+AES-256-CBC", u"+SHA1",
 
1189
            #                      u"+COMP-NULL", u"+CTYPE-OPENPGP",
 
1190
            #                      u"+DHE-DSS"))
 
1191
            # Use a fallback default, since this MUST be set.
 
1192
            priority = self.server.gnutls_priority
 
1193
            if priority is None:
 
1194
                priority = u"NORMAL"
 
1195
            (gnutls.library.functions
 
1196
             .gnutls_priority_set_direct(session._c_object,
 
1197
                                         priority, None))
 
1198
 
 
1199
            # Start communication using the Mandos protocol
 
1200
            # Get protocol number
 
1201
            line = self.request.makefile().readline()
 
1202
            logger.debug(u"Protocol version: %r", line)
 
1203
            try:
 
1204
                if int(line.strip().split()[0]) > 1:
 
1205
                    raise RuntimeError
 
1206
            except (ValueError, IndexError, RuntimeError), error:
 
1207
                logger.error(u"Unknown protocol version: %s", error)
 
1208
                return
 
1209
 
 
1210
            # Start GnuTLS connection
 
1211
            try:
 
1212
                session.handshake()
 
1213
            except gnutls.errors.GNUTLSError, error:
 
1214
                logger.warning(u"Handshake failed: %s", error)
 
1215
                # Do not run session.bye() here: the session is not
 
1216
                # established.  Just abandon the request.
 
1217
                return
 
1218
            logger.debug(u"Handshake succeeded")
 
1219
 
 
1220
            approval_required = False
 
1221
            try:
 
1222
                try:
 
1223
                    fpr = self.fingerprint(self.peer_certificate
 
1224
                                           (session))
 
1225
                except (TypeError, gnutls.errors.GNUTLSError), error:
 
1226
                    logger.warning(u"Bad certificate: %s", error)
 
1227
                    return
 
1228
                logger.debug(u"Fingerprint: %s", fpr)
 
1229
 
 
1230
                try:
 
1231
                    client = ProxyClient(child_pipe, fpr,
 
1232
                                         self.client_address)
 
1233
                except KeyError:
 
1234
                    return
 
1235
                
 
1236
                if client.approval_delay:
 
1237
                    delay = client.approval_delay
 
1238
                    client.approvals_pending += 1
 
1239
                    approval_required = True
 
1240
                
 
1241
                while True:
 
1242
                    if not client.enabled:
 
1243
                        logger.warning(u"Client %s is disabled",
 
1244
                                       client.name)
 
1245
                        if self.server.use_dbus:
 
1246
                            # Emit D-Bus signal
 
1247
                            client.Rejected("Disabled")                    
 
1248
                        return
 
1249
                    
 
1250
                    if client._approved or not client.approval_delay:
 
1251
                        #We are approved or approval is disabled
 
1252
                        break
 
1253
                    elif client._approved is None:
 
1254
                        logger.info(u"Client %s needs approval",
 
1255
                                    client.name)
 
1256
                        if self.server.use_dbus:
 
1257
                            # Emit D-Bus signal
 
1258
                            client.NeedApproval(
 
1259
                                client.approval_delay_milliseconds(),
 
1260
                                client.approved_by_default)
 
1261
                    else:
 
1262
                        logger.warning(u"Client %s was not approved",
 
1263
                                       client.name)
 
1264
                        if self.server.use_dbus:
 
1265
                            # Emit D-Bus signal
 
1266
                            client.Rejected("Denied")
 
1267
                        return
 
1268
                    
 
1269
                    #wait until timeout or approved
 
1270
                    #x = float(client._timedelta_to_milliseconds(delay))
 
1271
                    time = datetime.datetime.now()
 
1272
                    client.changedstate.acquire()
 
1273
                    client.changedstate.wait(float(client._timedelta_to_milliseconds(delay) / 1000))
 
1274
                    client.changedstate.release()
 
1275
                    time2 = datetime.datetime.now()
 
1276
                    if (time2 - time) >= delay:
 
1277
                        if not client.approved_by_default:
 
1278
                            logger.warning("Client %s timed out while"
 
1279
                                           " waiting for approval",
 
1280
                                           client.name)
 
1281
                            if self.server.use_dbus:
 
1282
                                # Emit D-Bus signal
 
1283
                                client.Rejected("Approval timed out")
 
1284
                            return
 
1285
                        else:
 
1286
                            break
 
1287
                    else:
 
1288
                        delay -= time2 - time
 
1289
                
 
1290
                sent_size = 0
 
1291
                while sent_size < len(client.secret):
 
1292
                    try:
 
1293
                        sent = session.send(client.secret[sent_size:])
 
1294
                    except (gnutls.errors.GNUTLSError), error:
 
1295
                        logger.warning("gnutls send failed")
 
1296
                        return
 
1297
                    logger.debug(u"Sent: %d, remaining: %d",
 
1298
                                 sent, len(client.secret)
 
1299
                                 - (sent_size + sent))
 
1300
                    sent_size += sent
 
1301
 
 
1302
                logger.info(u"Sending secret to %s", client.name)
 
1303
                # bump the timeout as if seen
 
1304
                client.checked_ok()
 
1305
                if self.server.use_dbus:
 
1306
                    # Emit D-Bus signal
 
1307
                    client.GotSecret()
 
1308
            
 
1309
            finally:
 
1310
                if approval_required:
 
1311
                    client.approvals_pending -= 1
 
1312
                try:
 
1313
                    session.bye()
 
1314
                except (gnutls.errors.GNUTLSError), error:
 
1315
                    logger.warning("GnuTLS bye failed")
 
1316
    
 
1317
    @staticmethod
 
1318
    def peer_certificate(session):
 
1319
        "Return the peer's OpenPGP certificate as a bytestring"
 
1320
        # If not an OpenPGP certificate...
 
1321
        if (gnutls.library.functions
 
1322
            .gnutls_certificate_type_get(session._c_object)
 
1323
            != gnutls.library.constants.GNUTLS_CRT_OPENPGP):
 
1324
            # ...do the normal thing
 
1325
            return session.peer_certificate
 
1326
        list_size = ctypes.c_uint(1)
 
1327
        cert_list = (gnutls.library.functions
 
1328
                     .gnutls_certificate_get_peers
 
1329
                     (session._c_object, ctypes.byref(list_size)))
 
1330
        if not bool(cert_list) and list_size.value != 0:
 
1331
            raise gnutls.errors.GNUTLSError(u"error getting peer"
 
1332
                                            u" certificate")
 
1333
        if list_size.value == 0:
 
1334
            return None
 
1335
        cert = cert_list[0]
 
1336
        return ctypes.string_at(cert.data, cert.size)
 
1337
    
 
1338
    @staticmethod
 
1339
    def fingerprint(openpgp):
 
1340
        "Convert an OpenPGP bytestring to a hexdigit fingerprint"
 
1341
        # New GnuTLS "datum" with the OpenPGP public key
 
1342
        datum = (gnutls.library.types
 
1343
                 .gnutls_datum_t(ctypes.cast(ctypes.c_char_p(openpgp),
 
1344
                                             ctypes.POINTER
 
1345
                                             (ctypes.c_ubyte)),
 
1346
                                 ctypes.c_uint(len(openpgp))))
 
1347
        # New empty GnuTLS certificate
 
1348
        crt = gnutls.library.types.gnutls_openpgp_crt_t()
 
1349
        (gnutls.library.functions
 
1350
         .gnutls_openpgp_crt_init(ctypes.byref(crt)))
 
1351
        # Import the OpenPGP public key into the certificate
 
1352
        (gnutls.library.functions
 
1353
         .gnutls_openpgp_crt_import(crt, ctypes.byref(datum),
 
1354
                                    gnutls.library.constants
 
1355
                                    .GNUTLS_OPENPGP_FMT_RAW))
 
1356
        # Verify the self signature in the key
 
1357
        crtverify = ctypes.c_uint()
 
1358
        (gnutls.library.functions
 
1359
         .gnutls_openpgp_crt_verify_self(crt, 0,
 
1360
                                         ctypes.byref(crtverify)))
 
1361
        if crtverify.value != 0:
 
1362
            gnutls.library.functions.gnutls_openpgp_crt_deinit(crt)
 
1363
            raise (gnutls.errors.CertificateSecurityError
 
1364
                   (u"Verify failed"))
 
1365
        # New buffer for the fingerprint
 
1366
        buf = ctypes.create_string_buffer(20)
 
1367
        buf_len = ctypes.c_size_t()
 
1368
        # Get the fingerprint from the certificate into the buffer
 
1369
        (gnutls.library.functions
 
1370
         .gnutls_openpgp_crt_get_fingerprint(crt, ctypes.byref(buf),
 
1371
                                             ctypes.byref(buf_len)))
 
1372
        # Deinit the certificate
 
1373
        gnutls.library.functions.gnutls_openpgp_crt_deinit(crt)
 
1374
        # Convert the buffer to a Python bytestring
 
1375
        fpr = ctypes.string_at(buf, buf_len.value)
 
1376
        # Convert the bytestring to hexadecimal notation
 
1377
        hex_fpr = u''.join(u"%02X" % ord(char) for char in fpr)
 
1378
        return hex_fpr
 
1379
 
 
1380
 
 
1381
class MultiprocessingMixIn(object):
 
1382
    """Like socketserver.ThreadingMixIn, but with multiprocessing"""
 
1383
    def sub_process_main(self, request, address):
 
1384
        try:
 
1385
            self.finish_request(request, address)
 
1386
        except:
 
1387
            self.handle_error(request, address)
 
1388
        self.close_request(request)
 
1389
            
 
1390
    def process_request(self, request, address):
 
1391
        """Start a new process to process the request."""
 
1392
        multiprocessing.Process(target = self.sub_process_main,
 
1393
                                args = (request, address)).start()
 
1394
 
 
1395
class MultiprocessingMixInWithPipe(MultiprocessingMixIn, object):
 
1396
    """ adds a pipe to the MixIn """
 
1397
    def process_request(self, request, client_address):
 
1398
        """Overrides and wraps the original process_request().
 
1399
        
 
1400
        This function creates a new pipe in self.pipe
 
1401
        """
 
1402
        parent_pipe, self.child_pipe = multiprocessing.Pipe()
 
1403
 
 
1404
        super(MultiprocessingMixInWithPipe,
 
1405
              self).process_request(request, client_address)
 
1406
        self.child_pipe.close()
 
1407
        self.add_pipe(parent_pipe)
 
1408
 
 
1409
    def add_pipe(self, parent_pipe):
 
1410
        """Dummy function; override as necessary"""
 
1411
        pass
 
1412
 
 
1413
class IPv6_TCPServer(MultiprocessingMixInWithPipe,
 
1414
                     socketserver.TCPServer, object):
 
1415
    """IPv6-capable TCP server.  Accepts 'None' as address and/or port
 
1416
    
731
1417
    Attributes:
732
 
        settings:       Server settings
733
 
        clients:        Set() of Client objects
734
1418
        enabled:        Boolean; whether this server is activated yet
 
1419
        interface:      None or a network interface name (string)
 
1420
        use_ipv6:       Boolean; to use IPv6 or not
735
1421
    """
736
 
    address_family = socket.AF_INET6
737
 
    def __init__(self, *args, **kwargs):
738
 
        if "settings" in kwargs:
739
 
            self.settings = kwargs["settings"]
740
 
            del kwargs["settings"]
741
 
        if "clients" in kwargs:
742
 
            self.clients = kwargs["clients"]
743
 
            del kwargs["clients"]
744
 
        self.enabled = False
745
 
        super(IPv6_TCPServer, self).__init__(*args, **kwargs)
 
1422
    def __init__(self, server_address, RequestHandlerClass,
 
1423
                 interface=None, use_ipv6=True):
 
1424
        self.interface = interface
 
1425
        if use_ipv6:
 
1426
            self.address_family = socket.AF_INET6
 
1427
        socketserver.TCPServer.__init__(self, server_address,
 
1428
                                        RequestHandlerClass)
746
1429
    def server_bind(self):
747
1430
        """This overrides the normal server_bind() function
748
1431
        to bind to an interface if one was specified, and also NOT to
749
1432
        bind to an address or port if they were not specified."""
750
 
        if self.settings["interface"]:
751
 
            # 25 is from /usr/include/asm-i486/socket.h
752
 
            SO_BINDTODEVICE = getattr(socket, "SO_BINDTODEVICE", 25)
753
 
            try:
754
 
                self.socket.setsockopt(socket.SOL_SOCKET,
755
 
                                       SO_BINDTODEVICE,
756
 
                                       self.settings["interface"])
757
 
            except socket.error, error:
758
 
                if error[0] == errno.EPERM:
759
 
                    logger.error(u"No permission to"
760
 
                                 u" bind to interface %s",
761
 
                                 self.settings["interface"])
762
 
                else:
763
 
                    raise error
 
1433
        if self.interface is not None:
 
1434
            if SO_BINDTODEVICE is None:
 
1435
                logger.error(u"SO_BINDTODEVICE does not exist;"
 
1436
                             u" cannot bind to interface %s",
 
1437
                             self.interface)
 
1438
            else:
 
1439
                try:
 
1440
                    self.socket.setsockopt(socket.SOL_SOCKET,
 
1441
                                           SO_BINDTODEVICE,
 
1442
                                           str(self.interface
 
1443
                                               + u'\0'))
 
1444
                except socket.error, error:
 
1445
                    if error[0] == errno.EPERM:
 
1446
                        logger.error(u"No permission to"
 
1447
                                     u" bind to interface %s",
 
1448
                                     self.interface)
 
1449
                    elif error[0] == errno.ENOPROTOOPT:
 
1450
                        logger.error(u"SO_BINDTODEVICE not available;"
 
1451
                                     u" cannot bind to interface %s",
 
1452
                                     self.interface)
 
1453
                    else:
 
1454
                        raise
764
1455
        # Only bind(2) the socket if we really need to.
765
1456
        if self.server_address[0] or self.server_address[1]:
766
1457
            if not self.server_address[0]:
767
 
                in6addr_any = "::"
768
 
                self.server_address = (in6addr_any,
 
1458
                if self.address_family == socket.AF_INET6:
 
1459
                    any_address = u"::" # in6addr_any
 
1460
                else:
 
1461
                    any_address = socket.INADDR_ANY
 
1462
                self.server_address = (any_address,
769
1463
                                       self.server_address[1])
770
1464
            elif not self.server_address[1]:
771
1465
                self.server_address = (self.server_address[0],
772
1466
                                       0)
773
 
#                 if self.settings["interface"]:
 
1467
#                 if self.interface:
774
1468
#                     self.server_address = (self.server_address[0],
775
1469
#                                            0, # port
776
1470
#                                            0, # flowinfo
777
1471
#                                            if_nametoindex
778
 
#                                            (self.settings
779
 
#                                             ["interface"]))
780
 
            return super(IPv6_TCPServer, self).server_bind()
 
1472
#                                            (self.interface))
 
1473
            return socketserver.TCPServer.server_bind(self)
 
1474
 
 
1475
 
 
1476
class MandosServer(IPv6_TCPServer):
 
1477
    """Mandos server.
 
1478
    
 
1479
    Attributes:
 
1480
        clients:        set of Client objects
 
1481
        gnutls_priority GnuTLS priority string
 
1482
        use_dbus:       Boolean; to emit D-Bus signals or not
 
1483
    
 
1484
    Assumes a gobject.MainLoop event loop.
 
1485
    """
 
1486
    def __init__(self, server_address, RequestHandlerClass,
 
1487
                 interface=None, use_ipv6=True, clients=None,
 
1488
                 gnutls_priority=None, use_dbus=True):
 
1489
        self.enabled = False
 
1490
        self.clients = clients
 
1491
        if self.clients is None:
 
1492
            self.clients = set()
 
1493
        self.use_dbus = use_dbus
 
1494
        self.gnutls_priority = gnutls_priority
 
1495
        IPv6_TCPServer.__init__(self, server_address,
 
1496
                                RequestHandlerClass,
 
1497
                                interface = interface,
 
1498
                                use_ipv6 = use_ipv6)
781
1499
    def server_activate(self):
782
1500
        if self.enabled:
783
 
            return super(IPv6_TCPServer, self).server_activate()
 
1501
            return socketserver.TCPServer.server_activate(self)
784
1502
    def enable(self):
785
1503
        self.enabled = True
 
1504
    def add_pipe(self, parent_pipe):
 
1505
        # Call "handle_ipc" for both data and EOF events
 
1506
        gobject.io_add_watch(parent_pipe.fileno(),
 
1507
                             gobject.IO_IN | gobject.IO_HUP,
 
1508
                             functools.partial(self.handle_ipc,
 
1509
                                               parent_pipe = parent_pipe))
 
1510
        
 
1511
    def handle_ipc(self, source, condition, parent_pipe=None,
 
1512
                   client_object=None):
 
1513
        condition_names = {
 
1514
            gobject.IO_IN: u"IN",   # There is data to read.
 
1515
            gobject.IO_OUT: u"OUT", # Data can be written (without
 
1516
                                    # blocking).
 
1517
            gobject.IO_PRI: u"PRI", # There is urgent data to read.
 
1518
            gobject.IO_ERR: u"ERR", # Error condition.
 
1519
            gobject.IO_HUP: u"HUP"  # Hung up (the connection has been
 
1520
                                    # broken, usually for pipes and
 
1521
                                    # sockets).
 
1522
            }
 
1523
        conditions_string = ' | '.join(name
 
1524
                                       for cond, name in
 
1525
                                       condition_names.iteritems()
 
1526
                                       if cond & condition)
 
1527
        # error or the other end of multiprocessing.Pipe has closed
 
1528
        if condition & (gobject.IO_ERR | condition & gobject.IO_HUP):
 
1529
            return False
 
1530
        
 
1531
        # Read a request from the child
 
1532
        request = parent_pipe.recv()
 
1533
        command = request[0]
 
1534
        
 
1535
        if command == 'init':
 
1536
            fpr = request[1]
 
1537
            address = request[2]
 
1538
            
 
1539
            for c in self.clients:
 
1540
                if c.fingerprint == fpr:
 
1541
                    client = c
 
1542
                    break
 
1543
            else:
 
1544
                logger.warning(u"Client not found for fingerprint: %s, ad"
 
1545
                               u"dress: %s", fpr, address)
 
1546
                if self.use_dbus:
 
1547
                    # Emit D-Bus signal
 
1548
                    mandos_dbus_service.ClientNotFound(fpr, address[0])
 
1549
                parent_pipe.send(False)
 
1550
                return False
 
1551
            
 
1552
            gobject.io_add_watch(parent_pipe.fileno(),
 
1553
                                 gobject.IO_IN | gobject.IO_HUP,
 
1554
                                 functools.partial(self.handle_ipc,
 
1555
                                                   parent_pipe = parent_pipe,
 
1556
                                                   client_object = client))
 
1557
            parent_pipe.send(True)
 
1558
            # remove the old hook in favor of the new above hook on same fileno
 
1559
            return False
 
1560
        if command == 'funcall':
 
1561
            funcname = request[1]
 
1562
            args = request[2]
 
1563
            kwargs = request[3]
 
1564
            
 
1565
            parent_pipe.send(('data', getattr(client_object, funcname)(*args, **kwargs)))
 
1566
 
 
1567
        if command == 'getattr':
 
1568
            attrname = request[1]
 
1569
            if callable(client_object.__getattribute__(attrname)):
 
1570
                parent_pipe.send(('function',))
 
1571
            else:
 
1572
                parent_pipe.send(('data', client_object.__getattribute__(attrname)))
 
1573
        
 
1574
        if command == 'setattr':
 
1575
            attrname = request[1]
 
1576
            value = request[2]
 
1577
            setattr(client_object, attrname, value)
 
1578
 
 
1579
        return True
786
1580
 
787
1581
 
788
1582
def string_to_delta(interval):
789
1583
    """Parse a string and return a datetime.timedelta
790
 
 
791
 
    >>> string_to_delta('7d')
 
1584
    
 
1585
    >>> string_to_delta(u'7d')
792
1586
    datetime.timedelta(7)
793
 
    >>> string_to_delta('60s')
 
1587
    >>> string_to_delta(u'60s')
794
1588
    datetime.timedelta(0, 60)
795
 
    >>> string_to_delta('60m')
 
1589
    >>> string_to_delta(u'60m')
796
1590
    datetime.timedelta(0, 3600)
797
 
    >>> string_to_delta('24h')
 
1591
    >>> string_to_delta(u'24h')
798
1592
    datetime.timedelta(1)
799
1593
    >>> string_to_delta(u'1w')
800
1594
    datetime.timedelta(7)
801
 
    >>> string_to_delta('5m 30s')
 
1595
    >>> string_to_delta(u'5m 30s')
802
1596
    datetime.timedelta(0, 330)
803
1597
    """
804
1598
    timevalue = datetime.timedelta(0)
817
1611
            elif suffix == u"w":
818
1612
                delta = datetime.timedelta(0, 0, 0, 0, 0, 0, value)
819
1613
            else:
820
 
                raise ValueError
821
 
        except (ValueError, IndexError):
822
 
            raise ValueError
 
1614
                raise ValueError(u"Unknown suffix %r" % suffix)
 
1615
        except (ValueError, IndexError), e:
 
1616
            raise ValueError(e.message)
823
1617
        timevalue += delta
824
1618
    return timevalue
825
1619
 
826
1620
 
827
 
def server_state_changed(state):
828
 
    """Derived from the Avahi example code"""
829
 
    if state == avahi.SERVER_COLLISION:
830
 
        logger.error(u"Zeroconf server name collision")
831
 
        service.remove()
832
 
    elif state == avahi.SERVER_RUNNING:
833
 
        service.add()
834
 
 
835
 
 
836
 
def entry_group_state_changed(state, error):
837
 
    """Derived from the Avahi example code"""
838
 
    logger.debug(u"Avahi state change: %i", state)
839
 
    
840
 
    if state == avahi.ENTRY_GROUP_ESTABLISHED:
841
 
        logger.debug(u"Zeroconf service established.")
842
 
    elif state == avahi.ENTRY_GROUP_COLLISION:
843
 
        logger.warning(u"Zeroconf service name collision.")
844
 
        service.rename()
845
 
    elif state == avahi.ENTRY_GROUP_FAILURE:
846
 
        logger.critical(u"Avahi: Error in group state changed %s",
847
 
                        unicode(error))
848
 
        raise AvahiGroupError("State changed: %s", str(error))
849
 
 
850
1621
def if_nametoindex(interface):
851
 
    """Call the C function if_nametoindex(), or equivalent"""
 
1622
    """Call the C function if_nametoindex(), or equivalent
 
1623
    
 
1624
    Note: This function cannot accept a unicode string."""
852
1625
    global if_nametoindex
853
1626
    try:
854
1627
        if_nametoindex = (ctypes.cdll.LoadLibrary
855
 
                          (ctypes.util.find_library("c"))
 
1628
                          (ctypes.util.find_library(u"c"))
856
1629
                          .if_nametoindex)
857
1630
    except (OSError, AttributeError):
858
 
        if "struct" not in sys.modules:
859
 
            import struct
860
 
        if "fcntl" not in sys.modules:
861
 
            import fcntl
 
1631
        logger.warning(u"Doing if_nametoindex the hard way")
862
1632
        def if_nametoindex(interface):
863
1633
            "Get an interface index the hard way, i.e. using fcntl()"
864
1634
            SIOCGIFINDEX = 0x8933  # From /usr/include/linux/sockios.h
865
 
            with closing(socket.socket()) as s:
 
1635
            with contextlib.closing(socket.socket()) as s:
866
1636
                ifreq = fcntl.ioctl(s, SIOCGIFINDEX,
867
 
                                    struct.pack("16s16x", interface))
868
 
            interface_index = struct.unpack("I", ifreq[16:20])[0]
 
1637
                                    struct.pack(str(u"16s16x"),
 
1638
                                                interface))
 
1639
            interface_index = struct.unpack(str(u"I"),
 
1640
                                            ifreq[16:20])[0]
869
1641
            return interface_index
870
1642
    return if_nametoindex(interface)
871
1643
 
872
1644
 
873
1645
def daemon(nochdir = False, noclose = False):
874
1646
    """See daemon(3).  Standard BSD Unix function.
 
1647
    
875
1648
    This should really exist as os.daemon, but it doesn't (yet)."""
876
1649
    if os.fork():
877
1650
        sys.exit()
878
1651
    os.setsid()
879
1652
    if not nochdir:
880
 
        os.chdir("/")
 
1653
        os.chdir(u"/")
881
1654
    if os.fork():
882
1655
        sys.exit()
883
1656
    if not noclose:
885
1658
        null = os.open(os.path.devnull, os.O_NOCTTY | os.O_RDWR)
886
1659
        if not stat.S_ISCHR(os.fstat(null).st_mode):
887
1660
            raise OSError(errno.ENODEV,
888
 
                          "/dev/null not a character device")
 
1661
                          u"%s not a character device"
 
1662
                          % os.path.devnull)
889
1663
        os.dup2(null, sys.stdin.fileno())
890
1664
        os.dup2(null, sys.stdout.fileno())
891
1665
        os.dup2(null, sys.stderr.fileno())
894
1668
 
895
1669
 
896
1670
def main():
897
 
    parser = OptionParser(version = "%%prog %s" % version)
898
 
    parser.add_option("-i", "--interface", type="string",
899
 
                      metavar="IF", help="Bind to interface IF")
900
 
    parser.add_option("-a", "--address", type="string",
901
 
                      help="Address to listen for requests on")
902
 
    parser.add_option("-p", "--port", type="int",
903
 
                      help="Port number to receive requests on")
904
 
    parser.add_option("--check", action="store_true", default=False,
905
 
                      help="Run self-test")
906
 
    parser.add_option("--debug", action="store_true",
907
 
                      help="Debug mode; run in foreground and log to"
908
 
                      " terminal")
909
 
    parser.add_option("--priority", type="string", help="GnuTLS"
910
 
                      " priority string (see GnuTLS documentation)")
911
 
    parser.add_option("--servicename", type="string", metavar="NAME",
912
 
                      help="Zeroconf service name")
913
 
    parser.add_option("--configdir", type="string",
914
 
                      default="/etc/mandos", metavar="DIR",
915
 
                      help="Directory to search for configuration"
916
 
                      " files")
 
1671
    
 
1672
    ##################################################################
 
1673
    # Parsing of options, both command line and config file
 
1674
    
 
1675
    parser = optparse.OptionParser(version = "%%prog %s" % version)
 
1676
    parser.add_option("-i", u"--interface", type=u"string",
 
1677
                      metavar="IF", help=u"Bind to interface IF")
 
1678
    parser.add_option("-a", u"--address", type=u"string",
 
1679
                      help=u"Address to listen for requests on")
 
1680
    parser.add_option("-p", u"--port", type=u"int",
 
1681
                      help=u"Port number to receive requests on")
 
1682
    parser.add_option("--check", action=u"store_true",
 
1683
                      help=u"Run self-test")
 
1684
    parser.add_option("--debug", action=u"store_true",
 
1685
                      help=u"Debug mode; run in foreground and log to"
 
1686
                      u" terminal")
 
1687
    parser.add_option("--debuglevel", type=u"string", metavar="LEVEL",
 
1688
                      help=u"Debug level for stdout output")
 
1689
    parser.add_option("--priority", type=u"string", help=u"GnuTLS"
 
1690
                      u" priority string (see GnuTLS documentation)")
 
1691
    parser.add_option("--servicename", type=u"string",
 
1692
                      metavar=u"NAME", help=u"Zeroconf service name")
 
1693
    parser.add_option("--configdir", type=u"string",
 
1694
                      default=u"/etc/mandos", metavar=u"DIR",
 
1695
                      help=u"Directory to search for configuration"
 
1696
                      u" files")
 
1697
    parser.add_option("--no-dbus", action=u"store_false",
 
1698
                      dest=u"use_dbus", help=u"Do not provide D-Bus"
 
1699
                      u" system bus interface")
 
1700
    parser.add_option("--no-ipv6", action=u"store_false",
 
1701
                      dest=u"use_ipv6", help=u"Do not use IPv6")
917
1702
    options = parser.parse_args()[0]
918
1703
    
919
1704
    if options.check:
922
1707
        sys.exit()
923
1708
    
924
1709
    # Default values for config file for server-global settings
925
 
    server_defaults = { "interface": "",
926
 
                        "address": "",
927
 
                        "port": "",
928
 
                        "debug": "False",
929
 
                        "priority":
930
 
                        "SECURE256:!CTYPE-X.509:+CTYPE-OPENPGP",
931
 
                        "servicename": "Mandos",
 
1710
    server_defaults = { u"interface": u"",
 
1711
                        u"address": u"",
 
1712
                        u"port": u"",
 
1713
                        u"debug": u"False",
 
1714
                        u"priority":
 
1715
                        u"SECURE256:!CTYPE-X.509:+CTYPE-OPENPGP",
 
1716
                        u"servicename": u"Mandos",
 
1717
                        u"use_dbus": u"True",
 
1718
                        u"use_ipv6": u"True",
 
1719
                        u"debuglevel": u"",
932
1720
                        }
933
1721
    
934
1722
    # Parse config file for server-global settings
935
 
    server_config = ConfigParser.SafeConfigParser(server_defaults)
 
1723
    server_config = configparser.SafeConfigParser(server_defaults)
936
1724
    del server_defaults
937
 
    server_config.read(os.path.join(options.configdir, "mandos.conf"))
 
1725
    server_config.read(os.path.join(options.configdir,
 
1726
                                    u"mandos.conf"))
938
1727
    # Convert the SafeConfigParser object to a dict
939
1728
    server_settings = server_config.defaults()
940
 
    # Use getboolean on the boolean config option
941
 
    server_settings["debug"] = (server_config.getboolean
942
 
                                ("DEFAULT", "debug"))
 
1729
    # Use the appropriate methods on the non-string config options
 
1730
    for option in (u"debug", u"use_dbus", u"use_ipv6"):
 
1731
        server_settings[option] = server_config.getboolean(u"DEFAULT",
 
1732
                                                           option)
 
1733
    if server_settings["port"]:
 
1734
        server_settings["port"] = server_config.getint(u"DEFAULT",
 
1735
                                                       u"port")
943
1736
    del server_config
944
1737
    
945
1738
    # Override the settings from the config file with command line
946
1739
    # options, if set.
947
 
    for option in ("interface", "address", "port", "debug",
948
 
                   "priority", "servicename", "configdir"):
 
1740
    for option in (u"interface", u"address", u"port", u"debug",
 
1741
                   u"priority", u"servicename", u"configdir",
 
1742
                   u"use_dbus", u"use_ipv6", u"debuglevel"):
949
1743
        value = getattr(options, option)
950
1744
        if value is not None:
951
1745
            server_settings[option] = value
952
1746
    del options
 
1747
    # Force all strings to be unicode
 
1748
    for option in server_settings.keys():
 
1749
        if type(server_settings[option]) is str:
 
1750
            server_settings[option] = unicode(server_settings[option])
953
1751
    # Now we have our good server settings in "server_settings"
954
1752
    
955
 
    debug = server_settings["debug"]
956
 
    
957
 
    if not debug:
958
 
        syslogger.setLevel(logging.WARNING)
959
 
        console.setLevel(logging.WARNING)
960
 
    
961
 
    if server_settings["servicename"] != "Mandos":
 
1753
    ##################################################################
 
1754
    
 
1755
    # For convenience
 
1756
    debug = server_settings[u"debug"]
 
1757
    debuglevel = server_settings[u"debuglevel"]
 
1758
    use_dbus = server_settings[u"use_dbus"]
 
1759
    use_ipv6 = server_settings[u"use_ipv6"]
 
1760
 
 
1761
    if server_settings[u"servicename"] != u"Mandos":
962
1762
        syslogger.setFormatter(logging.Formatter
963
 
                               ('Mandos (%s): %%(levelname)s:'
964
 
                                ' %%(message)s'
965
 
                                % server_settings["servicename"]))
 
1763
                               (u'Mandos (%s) [%%(process)d]:'
 
1764
                                u' %%(levelname)s: %%(message)s'
 
1765
                                % server_settings[u"servicename"]))
966
1766
    
967
1767
    # Parse config file with clients
968
 
    client_defaults = { "timeout": "1h",
969
 
                        "interval": "5m",
970
 
                        "checker": "fping -q -- %(host)s",
971
 
                        "host": "",
 
1768
    client_defaults = { u"timeout": u"1h",
 
1769
                        u"interval": u"5m",
 
1770
                        u"checker": u"fping -q -- %%(host)s",
 
1771
                        u"host": u"",
 
1772
                        u"approval_delay": u"0s",
 
1773
                        u"approval_duration": u"1s",
972
1774
                        }
973
 
    client_config = ConfigParser.SafeConfigParser(client_defaults)
974
 
    client_config.read(os.path.join(server_settings["configdir"],
975
 
                                    "clients.conf"))
976
 
    
977
 
    clients = Set()
978
 
    tcp_server = IPv6_TCPServer((server_settings["address"],
979
 
                                 server_settings["port"]),
980
 
                                TCP_handler,
981
 
                                settings=server_settings,
982
 
                                clients=clients)
983
 
    pidfilename = "/var/run/mandos.pid"
984
 
    try:
985
 
        pidfile = open(pidfilename, "w")
986
 
    except IOError, error:
987
 
        logger.error("Could not open file %r", pidfilename)
988
 
    
989
 
    try:
990
 
        uid = pwd.getpwnam("_mandos").pw_uid
 
1775
    client_config = configparser.SafeConfigParser(client_defaults)
 
1776
    client_config.read(os.path.join(server_settings[u"configdir"],
 
1777
                                    u"clients.conf"))
 
1778
    
 
1779
    global mandos_dbus_service
 
1780
    mandos_dbus_service = None
 
1781
    
 
1782
    tcp_server = MandosServer((server_settings[u"address"],
 
1783
                               server_settings[u"port"]),
 
1784
                              ClientHandler,
 
1785
                              interface=(server_settings[u"interface"]
 
1786
                                         or None),
 
1787
                              use_ipv6=use_ipv6,
 
1788
                              gnutls_priority=
 
1789
                              server_settings[u"priority"],
 
1790
                              use_dbus=use_dbus)
 
1791
    if not debug:
 
1792
        pidfilename = u"/var/run/mandos.pid"
 
1793
        try:
 
1794
            pidfile = open(pidfilename, u"w")
 
1795
        except IOError:
 
1796
            logger.error(u"Could not open file %r", pidfilename)
 
1797
    
 
1798
    try:
 
1799
        uid = pwd.getpwnam(u"_mandos").pw_uid
 
1800
        gid = pwd.getpwnam(u"_mandos").pw_gid
991
1801
    except KeyError:
992
1802
        try:
993
 
            uid = pwd.getpwnam("mandos").pw_uid
 
1803
            uid = pwd.getpwnam(u"mandos").pw_uid
 
1804
            gid = pwd.getpwnam(u"mandos").pw_gid
994
1805
        except KeyError:
995
1806
            try:
996
 
                uid = pwd.getpwnam("nobody").pw_uid
 
1807
                uid = pwd.getpwnam(u"nobody").pw_uid
 
1808
                gid = pwd.getpwnam(u"nobody").pw_gid
997
1809
            except KeyError:
998
1810
                uid = 65534
999
 
    try:
1000
 
        gid = pwd.getpwnam("_mandos").pw_gid
1001
 
    except KeyError:
1002
 
        try:
1003
 
            gid = pwd.getpwnam("mandos").pw_gid
1004
 
        except KeyError:
1005
 
            try:
1006
 
                gid = pwd.getpwnam("nogroup").pw_gid
1007
 
            except KeyError:
1008
1811
                gid = 65534
1009
1812
    try:
 
1813
        os.setgid(gid)
1010
1814
        os.setuid(uid)
1011
 
        os.setgid(gid)
1012
1815
    except OSError, error:
1013
1816
        if error[0] != errno.EPERM:
1014
1817
            raise error
1015
1818
    
1016
 
    global service
1017
 
    service = AvahiService(name = server_settings["servicename"],
1018
 
                           servicetype = "_mandos._tcp", )
1019
 
    if server_settings["interface"]:
1020
 
        service.interface = (if_nametoindex
1021
 
                             (server_settings["interface"]))
1022
 
    
1023
 
    global main_loop
1024
 
    global bus
1025
 
    global server
1026
 
    # From the Avahi example code
1027
 
    DBusGMainLoop(set_as_default=True )
1028
 
    main_loop = gobject.MainLoop()
1029
 
    bus = dbus.SystemBus()
1030
 
    server = dbus.Interface(bus.get_object(avahi.DBUS_NAME,
1031
 
                                           avahi.DBUS_PATH_SERVER),
1032
 
                            avahi.DBUS_INTERFACE_SERVER)
1033
 
    # End of Avahi example code
1034
 
    bus_name = dbus.service.BusName(u"org.mandos-system.Mandos", bus)
1035
 
    
1036
 
    clients.update(Set(Client(name = section,
1037
 
                              config
1038
 
                              = dict(client_config.items(section)))
1039
 
                       for section in client_config.sections()))
1040
 
    if not clients:
1041
 
        logger.critical(u"No clients defined")
1042
 
        sys.exit(1)
1043
 
    
 
1819
    if not debug and not debuglevel:
 
1820
        syslogger.setLevel(logging.WARNING)
 
1821
        console.setLevel(logging.WARNING)
 
1822
    if debuglevel:
 
1823
        level = getattr(logging, debuglevel.upper())
 
1824
        syslogger.setLevel(level)
 
1825
        console.setLevel(level)
 
1826
 
1044
1827
    if debug:
 
1828
        # Enable all possible GnuTLS debugging
 
1829
        
 
1830
        # "Use a log level over 10 to enable all debugging options."
 
1831
        # - GnuTLS manual
 
1832
        gnutls.library.functions.gnutls_global_set_log_level(11)
 
1833
        
 
1834
        @gnutls.library.types.gnutls_log_func
 
1835
        def debug_gnutls(level, string):
 
1836
            logger.debug(u"GnuTLS: %s", string[:-1])
 
1837
        
 
1838
        (gnutls.library.functions
 
1839
         .gnutls_global_set_log_function(debug_gnutls))
 
1840
        
1045
1841
        # Redirect stdin so all checkers get /dev/null
1046
1842
        null = os.open(os.path.devnull, os.O_NOCTTY | os.O_RDWR)
1047
1843
        os.dup2(null, sys.stdin.fileno())
1050
1846
    else:
1051
1847
        # No console logging
1052
1848
        logger.removeHandler(console)
 
1849
    
 
1850
    # Need to fork before connecting to D-Bus
 
1851
    if not debug:
1053
1852
        # Close all input and output, do double fork, etc.
1054
1853
        daemon()
1055
1854
    
1056
 
    try:
1057
 
        pid = os.getpid()
1058
 
        pidfile.write(str(pid) + "\n")
1059
 
        pidfile.close()
1060
 
        del pidfile
1061
 
    except IOError:
1062
 
        logger.error(u"Could not write to file %r with PID %d",
1063
 
                     pidfilename, pid)
1064
 
    except NameError:
1065
 
        # "pidfile" was never created
1066
 
        pass
1067
 
    del pidfilename
 
1855
    global main_loop
 
1856
    # From the Avahi example code
 
1857
    DBusGMainLoop(set_as_default=True )
 
1858
    main_loop = gobject.MainLoop()
 
1859
    bus = dbus.SystemBus()
 
1860
    # End of Avahi example code
 
1861
    if use_dbus:
 
1862
        try:
 
1863
            bus_name = dbus.service.BusName(u"se.bsnet.fukt.Mandos",
 
1864
                                            bus, do_not_queue=True)
 
1865
        except dbus.exceptions.NameExistsException, e:
 
1866
            logger.error(unicode(e) + u", disabling D-Bus")
 
1867
            use_dbus = False
 
1868
            server_settings[u"use_dbus"] = False
 
1869
            tcp_server.use_dbus = False
 
1870
    protocol = avahi.PROTO_INET6 if use_ipv6 else avahi.PROTO_INET
 
1871
    service = AvahiService(name = server_settings[u"servicename"],
 
1872
                           servicetype = u"_mandos._tcp",
 
1873
                           protocol = protocol, bus = bus)
 
1874
    if server_settings["interface"]:
 
1875
        service.interface = (if_nametoindex
 
1876
                             (str(server_settings[u"interface"])))
 
1877
    
 
1878
    global multiprocessing_manager
 
1879
    multiprocessing_manager = multiprocessing.Manager()
 
1880
    
 
1881
    client_class = Client
 
1882
    if use_dbus:
 
1883
        client_class = functools.partial(ClientDBus, bus = bus)
 
1884
    def client_config_items(config, section):
 
1885
        special_settings = {
 
1886
            "approved_by_default":
 
1887
                lambda: config.getboolean(section,
 
1888
                                          "approved_by_default"),
 
1889
            }
 
1890
        for name, value in config.items(section):
 
1891
            try:
 
1892
                yield (name, special_settings[name]())
 
1893
            except KeyError:
 
1894
                yield (name, value)
 
1895
    
 
1896
    tcp_server.clients.update(set(
 
1897
            client_class(name = section,
 
1898
                         config= dict(client_config_items(
 
1899
                        client_config, section)))
 
1900
            for section in client_config.sections()))
 
1901
    if not tcp_server.clients:
 
1902
        logger.warning(u"No clients defined")
 
1903
        
 
1904
    if not debug:
 
1905
        try:
 
1906
            with pidfile:
 
1907
                pid = os.getpid()
 
1908
                pidfile.write(str(pid) + "\n")
 
1909
            del pidfile
 
1910
        except IOError:
 
1911
            logger.error(u"Could not write to file %r with PID %d",
 
1912
                         pidfilename, pid)
 
1913
        except NameError:
 
1914
            # "pidfile" was never created
 
1915
            pass
 
1916
        del pidfilename
 
1917
        
 
1918
        signal.signal(signal.SIGINT, signal.SIG_IGN)
 
1919
 
 
1920
    signal.signal(signal.SIGHUP, lambda signum, frame: sys.exit())
 
1921
    signal.signal(signal.SIGTERM, lambda signum, frame: sys.exit())
 
1922
    
 
1923
    if use_dbus:
 
1924
        class MandosDBusService(dbus.service.Object):
 
1925
            """A D-Bus proxy object"""
 
1926
            def __init__(self):
 
1927
                dbus.service.Object.__init__(self, bus, u"/")
 
1928
            _interface = u"se.bsnet.fukt.Mandos"
 
1929
            
 
1930
            @dbus.service.signal(_interface, signature=u"o")
 
1931
            def ClientAdded(self, objpath):
 
1932
                "D-Bus signal"
 
1933
                pass
 
1934
            
 
1935
            @dbus.service.signal(_interface, signature=u"ss")
 
1936
            def ClientNotFound(self, fingerprint, address):
 
1937
                "D-Bus signal"
 
1938
                pass
 
1939
            
 
1940
            @dbus.service.signal(_interface, signature=u"os")
 
1941
            def ClientRemoved(self, objpath, name):
 
1942
                "D-Bus signal"
 
1943
                pass
 
1944
            
 
1945
            @dbus.service.method(_interface, out_signature=u"ao")
 
1946
            def GetAllClients(self):
 
1947
                "D-Bus method"
 
1948
                return dbus.Array(c.dbus_object_path
 
1949
                                  for c in tcp_server.clients)
 
1950
            
 
1951
            @dbus.service.method(_interface,
 
1952
                                 out_signature=u"a{oa{sv}}")
 
1953
            def GetAllClientsWithProperties(self):
 
1954
                "D-Bus method"
 
1955
                return dbus.Dictionary(
 
1956
                    ((c.dbus_object_path, c.GetAll(u""))
 
1957
                     for c in tcp_server.clients),
 
1958
                    signature=u"oa{sv}")
 
1959
            
 
1960
            @dbus.service.method(_interface, in_signature=u"o")
 
1961
            def RemoveClient(self, object_path):
 
1962
                "D-Bus method"
 
1963
                for c in tcp_server.clients:
 
1964
                    if c.dbus_object_path == object_path:
 
1965
                        tcp_server.clients.remove(c)
 
1966
                        c.remove_from_connection()
 
1967
                        # Don't signal anything except ClientRemoved
 
1968
                        c.disable(quiet=True)
 
1969
                        # Emit D-Bus signal
 
1970
                        self.ClientRemoved(object_path, c.name)
 
1971
                        return
 
1972
                raise KeyError(object_path)
 
1973
            
 
1974
            del _interface
 
1975
        
 
1976
        mandos_dbus_service = MandosDBusService()
1068
1977
    
1069
1978
    def cleanup():
1070
1979
        "Cleanup function; run on exit"
1071
 
        global group
1072
 
        # From the Avahi example code
1073
 
        if not group is None:
1074
 
            group.Free()
1075
 
            group = None
1076
 
        # End of Avahi example code
 
1980
        service.cleanup()
1077
1981
        
1078
 
        while clients:
1079
 
            client = clients.pop()
1080
 
            client.stop_hook = None
1081
 
            client.stop()
 
1982
        while tcp_server.clients:
 
1983
            client = tcp_server.clients.pop()
 
1984
            if use_dbus:
 
1985
                client.remove_from_connection()
 
1986
            client.disable_hook = None
 
1987
            # Don't signal anything except ClientRemoved
 
1988
            client.disable(quiet=True)
 
1989
            if use_dbus:
 
1990
                # Emit D-Bus signal
 
1991
                mandos_dbus_service.ClientRemoved(client.dbus_object_path,
 
1992
                                                  client.name)
1082
1993
    
1083
1994
    atexit.register(cleanup)
1084
1995
    
1085
 
    if not debug:
1086
 
        signal.signal(signal.SIGINT, signal.SIG_IGN)
1087
 
    signal.signal(signal.SIGHUP, lambda signum, frame: sys.exit())
1088
 
    signal.signal(signal.SIGTERM, lambda signum, frame: sys.exit())
1089
 
    
1090
 
    class MandosServer(dbus.service.Object):
1091
 
        """A D-Bus proxy object"""
1092
 
        def __init__(self):
1093
 
            dbus.service.Object.__init__(self, bus,
1094
 
                                         "/Mandos")
1095
 
        _interface = u"org.mandos_system.Mandos"
1096
 
        
1097
 
        @dbus.service.signal(_interface, signature="oa{sv}")
1098
 
        def ClientAdded(self, objpath, properties):
1099
 
            "D-Bus signal"
1100
 
            pass
1101
 
        
1102
 
        @dbus.service.signal(_interface, signature="o")
1103
 
        def ClientRemoved(self, objpath):
1104
 
            "D-Bus signal"
1105
 
            pass
1106
 
        
1107
 
        @dbus.service.method(_interface, out_signature="ao")
1108
 
        def GetAllClients(self):
1109
 
            return dbus.Array(c.dbus_object_path for c in clients)
1110
 
        
1111
 
        @dbus.service.method(_interface, out_signature="a{oa{sv}}")
1112
 
        def GetAllClientsWithProperties(self):
1113
 
            return dbus.Dictionary(
1114
 
                ((c.dbus_object_path, c.GetAllProperties())
1115
 
                 for c in clients),
1116
 
                signature="oa{sv}")
1117
 
        
1118
 
        @dbus.service.method(_interface, in_signature="o")
1119
 
        def RemoveClient(self, object_path):
1120
 
            for c in clients:
1121
 
                if c.dbus_object_path == object_path:
1122
 
                    c.stop()
1123
 
                    clients.remove(c)
1124
 
                    return
1125
 
            raise KeyError
1126
 
        
1127
 
        del _interface
1128
 
    
1129
 
    mandos_server = MandosServer()
1130
 
    
1131
 
    for client in clients:
1132
 
        # Emit D-Bus signal
1133
 
        mandos_server.ClientAdded(client.dbus_object_path,
1134
 
                                  client.GetAllProperties())
1135
 
        client.start()
 
1996
    for client in tcp_server.clients:
 
1997
        if use_dbus:
 
1998
            # Emit D-Bus signal
 
1999
            mandos_dbus_service.ClientAdded(client.dbus_object_path)
 
2000
        client.enable()
1136
2001
    
1137
2002
    tcp_server.enable()
1138
2003
    tcp_server.server_activate()
1139
2004
    
1140
2005
    # Find out what port we got
1141
2006
    service.port = tcp_server.socket.getsockname()[1]
1142
 
    logger.info(u"Now listening on address %r, port %d, flowinfo %d,"
1143
 
                u" scope_id %d" % tcp_server.socket.getsockname())
 
2007
    if use_ipv6:
 
2008
        logger.info(u"Now listening on address %r, port %d,"
 
2009
                    " flowinfo %d, scope_id %d"
 
2010
                    % tcp_server.socket.getsockname())
 
2011
    else:                       # IPv4
 
2012
        logger.info(u"Now listening on address %r, port %d"
 
2013
                    % tcp_server.socket.getsockname())
1144
2014
    
1145
2015
    #service.interface = tcp_server.socket.getsockname()[3]
1146
2016
    
1147
2017
    try:
1148
2018
        # From the Avahi example code
1149
 
        server.connect_to_signal("StateChanged", server_state_changed)
1150
2019
        try:
1151
 
            server_state_changed(server.GetState())
 
2020
            service.activate()
1152
2021
        except dbus.exceptions.DBusException, error:
1153
2022
            logger.critical(u"DBusException: %s", error)
 
2023
            cleanup()
1154
2024
            sys.exit(1)
1155
2025
        # End of Avahi example code
1156
2026
        
1162
2032
        logger.debug(u"Starting main loop")
1163
2033
        main_loop.run()
1164
2034
    except AvahiError, error:
1165
 
        logger.critical(u"AvahiError: %s" + unicode(error))
 
2035
        logger.critical(u"AvahiError: %s", error)
 
2036
        cleanup()
1166
2037
        sys.exit(1)
1167
2038
    except KeyboardInterrupt:
1168
2039
        if debug:
1169
 
            print
 
2040
            print >> sys.stderr
 
2041
        logger.debug(u"Server received KeyboardInterrupt")
 
2042
    logger.debug(u"Server exiting")
 
2043
    # Must run before the D-Bus bus name gets deregistered
 
2044
    cleanup()
1170
2045
 
1171
2046
if __name__ == '__main__':
1172
2047
    main()