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  • Committer: Teddy Hogeborn
  • Date: 2019-08-05 21:03:31 UTC
  • Revision ID: teddy@recompile.se-20190805210331-vut4mdrc129c6ycs
Override lintian warning about old debhelper format

* debian/source/lintian-overrides
  (package-uses-old-debhelper-compat-version): New; set to "10".

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Lines of Context:
mandos
1
1
#!/usr/bin/python
2
2
# -*- mode: python; coding: utf-8 -*-
3
 
# 
 
3
#
4
4
# Mandos server - give out binary blobs to connecting clients.
5
 
# 
 
5
#
6
6
# 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
9
# methods "add", "remove", "server_state_changed",
10
10
# "entry_group_state_changed", "cleanup", and "activate" in the
11
11
# "AvahiService" class, and some lines in "main".
12
 
# 
 
12
#
13
13
# Everything else is
14
 
# Copyright © 2008,2009 Teddy Hogeborn
15
 
# Copyright © 2008,2009 Björn Påhlsson
16
 
# 
17
 
# This program is free software: you can redistribute it and/or modify
18
 
# it under the terms of the GNU General Public License as published by
 
14
# Copyright © 2008-2019 Teddy Hogeborn
 
15
# Copyright © 2008-2019 Björn Påhlsson
 
16
#
 
17
# This file is part of Mandos.
 
18
#
 
19
# Mandos is free software: you can redistribute it and/or modify it
 
20
# under the terms of the GNU General Public License as published by
19
21
# the Free Software Foundation, either version 3 of the License, or
20
22
# (at your option) any later version.
21
23
#
22
 
#     This program is distributed in the hope that it will be useful,
23
 
#     but WITHOUT ANY WARRANTY; without even the implied warranty of
 
24
#     Mandos is distributed in the hope that it will be useful, but
 
25
#     WITHOUT ANY WARRANTY; without even the implied warranty of
24
26
#     MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
25
27
#     GNU General Public License for more details.
26
 
# 
 
28
#
27
29
# You should have received a copy of the GNU General Public License
28
 
# along with this program.  If not, see
29
 
# <http://www.gnu.org/licenses/>.
30
 
# 
31
 
# Contact the authors at <mandos@fukt.bsnet.se>.
32
 
# 
33
 
 
34
 
from __future__ import division, with_statement, absolute_import
35
 
 
36
 
import SocketServer as socketserver
 
30
# along with Mandos.  If not, see <http://www.gnu.org/licenses/>.
 
31
#
 
32
# Contact the authors at <mandos@recompile.se>.
 
33
#
 
34
 
 
35
from __future__ import (division, absolute_import, print_function,
 
36
                        unicode_literals)
 
37
 
 
38
try:
 
39
    from future_builtins import *
 
40
except ImportError:
 
41
    pass
 
42
 
 
43
try:
 
44
    import SocketServer as socketserver
 
45
except ImportError:
 
46
    import socketserver
37
47
import socket
38
 
import optparse
 
48
import argparse
39
49
import datetime
40
50
import errno
41
 
import gnutls.crypto
42
 
import gnutls.connection
43
 
import gnutls.errors
44
 
import gnutls.library.functions
45
 
import gnutls.library.constants
46
 
import gnutls.library.types
47
 
import ConfigParser as configparser
 
51
try:
 
52
    import ConfigParser as configparser
 
53
except ImportError:
 
54
    import configparser
48
55
import sys
49
56
import re
50
57
import os
55
62
import logging
56
63
import logging.handlers
57
64
import pwd
58
 
from contextlib import closing
 
65
import contextlib
59
66
import struct
60
67
import fcntl
 
68
import functools
 
69
try:
 
70
    import cPickle as pickle
 
71
except ImportError:
 
72
    import pickle
 
73
import multiprocessing
 
74
import types
 
75
import binascii
 
76
import tempfile
 
77
import itertools
 
78
import collections
 
79
import codecs
61
80
 
62
81
import dbus
63
82
import dbus.service
64
 
import gobject
65
 
import avahi
 
83
import gi
 
84
from gi.repository import GLib
66
85
from dbus.mainloop.glib import DBusGMainLoop
67
86
import ctypes
68
87
import ctypes.util
 
88
import xml.dom.minidom
 
89
import inspect
69
90
 
 
91
# Try to find the value of SO_BINDTODEVICE:
70
92
try:
 
93
    # This is where SO_BINDTODEVICE is in Python 3.3 (or 3.4?) and
 
94
    # newer, and it is also the most natural place for it:
71
95
    SO_BINDTODEVICE = socket.SO_BINDTODEVICE
72
96
except AttributeError:
73
97
    try:
 
98
        # This is where SO_BINDTODEVICE was up to and including Python
 
99
        # 2.6, and also 3.2:
74
100
        from IN import SO_BINDTODEVICE
75
101
    except ImportError:
76
 
        # From /usr/include/asm/socket.h
77
 
        SO_BINDTODEVICE = 25
78
 
 
79
 
 
80
 
version = "1.0.8"
81
 
 
82
 
logger = logging.Logger(u'mandos')
83
 
syslogger = (logging.handlers.SysLogHandler
84
 
             (facility = logging.handlers.SysLogHandler.LOG_DAEMON,
85
 
              address = "/dev/log"))
86
 
syslogger.setFormatter(logging.Formatter
87
 
                       (u'Mandos [%(process)d]: %(levelname)s:'
88
 
                        u' %(message)s'))
89
 
logger.addHandler(syslogger)
90
 
 
91
 
console = logging.StreamHandler()
92
 
console.setFormatter(logging.Formatter(u'%(name)s [%(process)d]:'
93
 
                                       u' %(levelname)s:'
94
 
                                       u' %(message)s'))
95
 
logger.addHandler(console)
 
102
        # In Python 2.7 it seems to have been removed entirely.
 
103
        # Try running the C preprocessor:
 
104
        try:
 
105
            cc = subprocess.Popen(["cc", "--language=c", "-E",
 
106
                                   "/dev/stdin"],
 
107
                                  stdin=subprocess.PIPE,
 
108
                                  stdout=subprocess.PIPE)
 
109
            stdout = cc.communicate(
 
110
                "#include <sys/socket.h>\nSO_BINDTODEVICE\n")[0]
 
111
            SO_BINDTODEVICE = int(stdout.splitlines()[-1])
 
112
        except (OSError, ValueError, IndexError):
 
113
            # No value found
 
114
            SO_BINDTODEVICE = None
 
115
 
 
116
if sys.version_info.major == 2:
 
117
    str = unicode
 
118
 
 
119
if sys.version_info < (3, 2):
 
120
    configparser.Configparser = configparser.SafeConfigParser
 
121
 
 
122
version = "1.8.6"
 
123
stored_state_file = "clients.pickle"
 
124
 
 
125
logger = logging.getLogger()
 
126
syslogger = None
 
127
 
 
128
try:
 
129
    if_nametoindex = ctypes.cdll.LoadLibrary(
 
130
        ctypes.util.find_library("c")).if_nametoindex
 
131
except (OSError, AttributeError):
 
132
 
 
133
    def if_nametoindex(interface):
 
134
        "Get an interface index the hard way, i.e. using fcntl()"
 
135
        SIOCGIFINDEX = 0x8933  # From /usr/include/linux/sockios.h
 
136
        with contextlib.closing(socket.socket()) as s:
 
137
            ifreq = fcntl.ioctl(s, SIOCGIFINDEX,
 
138
                                struct.pack(b"16s16x", interface))
 
139
        interface_index = struct.unpack("I", ifreq[16:20])[0]
 
140
        return interface_index
 
141
 
 
142
 
 
143
def copy_function(func):
 
144
    """Make a copy of a function"""
 
145
    if sys.version_info.major == 2:
 
146
        return types.FunctionType(func.func_code,
 
147
                                  func.func_globals,
 
148
                                  func.func_name,
 
149
                                  func.func_defaults,
 
150
                                  func.func_closure)
 
151
    else:
 
152
        return types.FunctionType(func.__code__,
 
153
                                  func.__globals__,
 
154
                                  func.__name__,
 
155
                                  func.__defaults__,
 
156
                                  func.__closure__)
 
157
 
 
158
 
 
159
def initlogger(debug, level=logging.WARNING):
 
160
    """init logger and add loglevel"""
 
161
 
 
162
    global syslogger
 
163
    syslogger = (logging.handlers.SysLogHandler(
 
164
        facility=logging.handlers.SysLogHandler.LOG_DAEMON,
 
165
        address="/dev/log"))
 
166
    syslogger.setFormatter(logging.Formatter
 
167
                           ('Mandos [%(process)d]: %(levelname)s:'
 
168
                            ' %(message)s'))
 
169
    logger.addHandler(syslogger)
 
170
 
 
171
    if debug:
 
172
        console = logging.StreamHandler()
 
173
        console.setFormatter(logging.Formatter('%(asctime)s %(name)s'
 
174
                                               ' [%(process)d]:'
 
175
                                               ' %(levelname)s:'
 
176
                                               ' %(message)s'))
 
177
        logger.addHandler(console)
 
178
    logger.setLevel(level)
 
179
 
 
180
 
 
181
class PGPError(Exception):
 
182
    """Exception if encryption/decryption fails"""
 
183
    pass
 
184
 
 
185
 
 
186
class PGPEngine(object):
 
187
    """A simple class for OpenPGP symmetric encryption & decryption"""
 
188
 
 
189
    def __init__(self):
 
190
        self.tempdir = tempfile.mkdtemp(prefix="mandos-")
 
191
        self.gpg = "gpg"
 
192
        try:
 
193
            output = subprocess.check_output(["gpgconf"])
 
194
            for line in output.splitlines():
 
195
                name, text, path = line.split(b":")
 
196
                if name == "gpg":
 
197
                    self.gpg = path
 
198
                    break
 
199
        except OSError as e:
 
200
            if e.errno != errno.ENOENT:
 
201
                raise
 
202
        self.gnupgargs = ['--batch',
 
203
                          '--homedir', self.tempdir,
 
204
                          '--force-mdc',
 
205
                          '--quiet']
 
206
        # Only GPG version 1 has the --no-use-agent option.
 
207
        if self.gpg == "gpg" or self.gpg.endswith("/gpg"):
 
208
            self.gnupgargs.append("--no-use-agent")
 
209
 
 
210
    def __enter__(self):
 
211
        return self
 
212
 
 
213
    def __exit__(self, exc_type, exc_value, traceback):
 
214
        self._cleanup()
 
215
        return False
 
216
 
 
217
    def __del__(self):
 
218
        self._cleanup()
 
219
 
 
220
    def _cleanup(self):
 
221
        if self.tempdir is not None:
 
222
            # Delete contents of tempdir
 
223
            for root, dirs, files in os.walk(self.tempdir,
 
224
                                             topdown=False):
 
225
                for filename in files:
 
226
                    os.remove(os.path.join(root, filename))
 
227
                for dirname in dirs:
 
228
                    os.rmdir(os.path.join(root, dirname))
 
229
            # Remove tempdir
 
230
            os.rmdir(self.tempdir)
 
231
            self.tempdir = None
 
232
 
 
233
    def password_encode(self, password):
 
234
        # Passphrase can not be empty and can not contain newlines or
 
235
        # NUL bytes.  So we prefix it and hex encode it.
 
236
        encoded = b"mandos" + binascii.hexlify(password)
 
237
        if len(encoded) > 2048:
 
238
            # GnuPG can't handle long passwords, so encode differently
 
239
            encoded = (b"mandos" + password.replace(b"\\", b"\\\\")
 
240
                       .replace(b"\n", b"\\n")
 
241
                       .replace(b"\0", b"\\x00"))
 
242
        return encoded
 
243
 
 
244
    def encrypt(self, data, password):
 
245
        passphrase = self.password_encode(password)
 
246
        with tempfile.NamedTemporaryFile(
 
247
                dir=self.tempdir) as passfile:
 
248
            passfile.write(passphrase)
 
249
            passfile.flush()
 
250
            proc = subprocess.Popen([self.gpg, '--symmetric',
 
251
                                     '--passphrase-file',
 
252
                                     passfile.name]
 
253
                                    + self.gnupgargs,
 
254
                                    stdin=subprocess.PIPE,
 
255
                                    stdout=subprocess.PIPE,
 
256
                                    stderr=subprocess.PIPE)
 
257
            ciphertext, err = proc.communicate(input=data)
 
258
        if proc.returncode != 0:
 
259
            raise PGPError(err)
 
260
        return ciphertext
 
261
 
 
262
    def decrypt(self, data, password):
 
263
        passphrase = self.password_encode(password)
 
264
        with tempfile.NamedTemporaryFile(
 
265
                dir=self.tempdir) as passfile:
 
266
            passfile.write(passphrase)
 
267
            passfile.flush()
 
268
            proc = subprocess.Popen([self.gpg, '--decrypt',
 
269
                                     '--passphrase-file',
 
270
                                     passfile.name]
 
271
                                    + self.gnupgargs,
 
272
                                    stdin=subprocess.PIPE,
 
273
                                    stdout=subprocess.PIPE,
 
274
                                    stderr=subprocess.PIPE)
 
275
            decrypted_plaintext, err = proc.communicate(input=data)
 
276
        if proc.returncode != 0:
 
277
            raise PGPError(err)
 
278
        return decrypted_plaintext
 
279
 
 
280
 
 
281
# Pretend that we have an Avahi module
 
282
class avahi(object):
 
283
    """This isn't so much a class as it is a module-like namespace."""
 
284
    IF_UNSPEC = -1               # avahi-common/address.h
 
285
    PROTO_UNSPEC = -1            # avahi-common/address.h
 
286
    PROTO_INET = 0               # avahi-common/address.h
 
287
    PROTO_INET6 = 1              # avahi-common/address.h
 
288
    DBUS_NAME = "org.freedesktop.Avahi"
 
289
    DBUS_INTERFACE_ENTRY_GROUP = DBUS_NAME + ".EntryGroup"
 
290
    DBUS_INTERFACE_SERVER = DBUS_NAME + ".Server"
 
291
    DBUS_PATH_SERVER = "/"
 
292
 
 
293
    @staticmethod
 
294
    def string_array_to_txt_array(t):
 
295
        return dbus.Array((dbus.ByteArray(s.encode("utf-8"))
 
296
                           for s in t), signature="ay")
 
297
    ENTRY_GROUP_ESTABLISHED = 2  # avahi-common/defs.h
 
298
    ENTRY_GROUP_COLLISION = 3    # avahi-common/defs.h
 
299
    ENTRY_GROUP_FAILURE = 4      # avahi-common/defs.h
 
300
    SERVER_INVALID = 0           # avahi-common/defs.h
 
301
    SERVER_REGISTERING = 1       # avahi-common/defs.h
 
302
    SERVER_RUNNING = 2           # avahi-common/defs.h
 
303
    SERVER_COLLISION = 3         # avahi-common/defs.h
 
304
    SERVER_FAILURE = 4           # avahi-common/defs.h
 
305
 
96
306
 
97
307
class AvahiError(Exception):
98
308
    def __init__(self, value, *args, **kwargs):
99
309
        self.value = value
100
 
        super(AvahiError, self).__init__(value, *args, **kwargs)
101
 
    def __unicode__(self):
102
 
        return unicode(repr(self.value))
 
310
        return super(AvahiError, self).__init__(value, *args,
 
311
                                                **kwargs)
 
312
 
103
313
 
104
314
class AvahiServiceError(AvahiError):
105
315
    pass
106
316
 
 
317
 
107
318
class AvahiGroupError(AvahiError):
108
319
    pass
109
320
 
110
321
 
111
322
class AvahiService(object):
112
323
    """An Avahi (Zeroconf) service.
113
 
    
 
324
 
114
325
    Attributes:
115
326
    interface: integer; avahi.IF_UNSPEC or an interface index.
116
327
               Used to optionally bind to the specified interface.
117
 
    name: string; Example: u'Mandos'
118
 
    type: string; Example: u'_mandos._tcp'.
119
 
                  See <http://www.dns-sd.org/ServiceTypes.html>
 
328
    name: string; Example: 'Mandos'
 
329
    type: string; Example: '_mandos._tcp'.
 
330
     See <https://www.iana.org/assignments/service-names-port-numbers>
120
331
    port: integer; what port to announce
121
332
    TXT: list of strings; TXT record for the service
122
333
    domain: string; Domain to publish on, default to .local if empty.
126
337
                  a sensible number of times
127
338
    group: D-Bus Entry Group
128
339
    server: D-Bus Server
 
340
    bus: dbus.SystemBus()
129
341
    """
130
 
    def __init__(self, interface = avahi.IF_UNSPEC, name = None,
131
 
                 servicetype = None, port = None, TXT = None,
132
 
                 domain = u"", host = u"", max_renames = 32768,
133
 
                 protocol = avahi.PROTO_UNSPEC):
 
342
 
 
343
    def __init__(self,
 
344
                 interface=avahi.IF_UNSPEC,
 
345
                 name=None,
 
346
                 servicetype=None,
 
347
                 port=None,
 
348
                 TXT=None,
 
349
                 domain="",
 
350
                 host="",
 
351
                 max_renames=32768,
 
352
                 protocol=avahi.PROTO_UNSPEC,
 
353
                 bus=None):
134
354
        self.interface = interface
135
355
        self.name = name
136
356
        self.type = servicetype
143
363
        self.protocol = protocol
144
364
        self.group = None       # our entry group
145
365
        self.server = None
146
 
    def rename(self):
 
366
        self.bus = bus
 
367
        self.entry_group_state_changed_match = None
 
368
 
 
369
    def rename(self, remove=True):
147
370
        """Derived from the Avahi example code"""
148
371
        if self.rename_count >= self.max_renames:
149
 
            logger.critical(u"No suitable Zeroconf service name found"
150
 
                            u" after %i retries, exiting.",
 
372
            logger.critical("No suitable Zeroconf service name found"
 
373
                            " after %i retries, exiting.",
151
374
                            self.rename_count)
152
 
            raise AvahiServiceError(u"Too many renames")
153
 
        self.name = self.server.GetAlternativeServiceName(self.name)
154
 
        logger.info(u"Changing Zeroconf service name to %r ...",
155
 
                    unicode(self.name))
156
 
        syslogger.setFormatter(logging.Formatter
157
 
                               (u'Mandos (%s) [%%(process)d]:'
158
 
                                u' %%(levelname)s: %%(message)s'
159
 
                                % self.name))
160
 
        self.remove()
161
 
        self.add()
 
375
            raise AvahiServiceError("Too many renames")
 
376
        self.name = str(
 
377
            self.server.GetAlternativeServiceName(self.name))
162
378
        self.rename_count += 1
 
379
        logger.info("Changing Zeroconf service name to %r ...",
 
380
                    self.name)
 
381
        if remove:
 
382
            self.remove()
 
383
        try:
 
384
            self.add()
 
385
        except dbus.exceptions.DBusException as error:
 
386
            if (error.get_dbus_name()
 
387
                == "org.freedesktop.Avahi.CollisionError"):
 
388
                logger.info("Local Zeroconf service name collision.")
 
389
                return self.rename(remove=False)
 
390
            else:
 
391
                logger.critical("D-Bus Exception", exc_info=error)
 
392
                self.cleanup()
 
393
                os._exit(1)
 
394
 
163
395
    def remove(self):
164
396
        """Derived from the Avahi example code"""
 
397
        if self.entry_group_state_changed_match is not None:
 
398
            self.entry_group_state_changed_match.remove()
 
399
            self.entry_group_state_changed_match = None
165
400
        if self.group is not None:
166
401
            self.group.Reset()
 
402
 
167
403
    def add(self):
168
404
        """Derived from the Avahi example code"""
 
405
        self.remove()
169
406
        if self.group is None:
170
407
            self.group = dbus.Interface(
171
 
                bus.get_object(avahi.DBUS_NAME,
172
 
                               self.server.EntryGroupNew()),
 
408
                self.bus.get_object(avahi.DBUS_NAME,
 
409
                                    self.server.EntryGroupNew()),
173
410
                avahi.DBUS_INTERFACE_ENTRY_GROUP)
174
 
            self.group.connect_to_signal('StateChanged',
175
 
                                         self.entry_group_state_changed)
176
 
        logger.debug(u"Adding Zeroconf service '%s' of type '%s' ...",
 
411
        self.entry_group_state_changed_match = (
 
412
            self.group.connect_to_signal(
 
413
                'StateChanged', self.entry_group_state_changed))
 
414
        logger.debug("Adding Zeroconf service '%s' of type '%s' ...",
177
415
                     self.name, self.type)
178
416
        self.group.AddService(
179
417
            self.interface,
184
422
            dbus.UInt16(self.port),
185
423
            avahi.string_array_to_txt_array(self.TXT))
186
424
        self.group.Commit()
 
425
 
187
426
    def entry_group_state_changed(self, state, error):
188
427
        """Derived from the Avahi example code"""
189
 
        logger.debug(u"Avahi state change: %i", state)
190
 
        
 
428
        logger.debug("Avahi entry group state change: %i", state)
 
429
 
191
430
        if state == avahi.ENTRY_GROUP_ESTABLISHED:
192
 
            logger.debug(u"Zeroconf service established.")
 
431
            logger.debug("Zeroconf service established.")
193
432
        elif state == avahi.ENTRY_GROUP_COLLISION:
194
 
            logger.warning(u"Zeroconf service name collision.")
 
433
            logger.info("Zeroconf service name collision.")
195
434
            self.rename()
196
435
        elif state == avahi.ENTRY_GROUP_FAILURE:
197
 
            logger.critical(u"Avahi: Error in group state changed %s",
198
 
                            unicode(error))
199
 
            raise AvahiGroupError(u"State changed: %s"
200
 
                                  % unicode(error))
 
436
            logger.critical("Avahi: Error in group state changed %s",
 
437
                            str(error))
 
438
            raise AvahiGroupError("State changed: {!s}".format(error))
 
439
 
201
440
    def cleanup(self):
202
441
        """Derived from the Avahi example code"""
203
442
        if self.group is not None:
204
 
            self.group.Free()
 
443
            try:
 
444
                self.group.Free()
 
445
            except (dbus.exceptions.UnknownMethodException,
 
446
                    dbus.exceptions.DBusException):
 
447
                pass
205
448
            self.group = None
206
 
    def server_state_changed(self, state):
 
449
        self.remove()
 
450
 
 
451
    def server_state_changed(self, state, error=None):
207
452
        """Derived from the Avahi example code"""
208
 
        if state == avahi.SERVER_COLLISION:
209
 
            logger.error(u"Zeroconf server name collision")
210
 
            self.remove()
 
453
        logger.debug("Avahi server state change: %i", state)
 
454
        bad_states = {
 
455
            avahi.SERVER_INVALID: "Zeroconf server invalid",
 
456
            avahi.SERVER_REGISTERING: None,
 
457
            avahi.SERVER_COLLISION: "Zeroconf server name collision",
 
458
            avahi.SERVER_FAILURE: "Zeroconf server failure",
 
459
        }
 
460
        if state in bad_states:
 
461
            if bad_states[state] is not None:
 
462
                if error is None:
 
463
                    logger.error(bad_states[state])
 
464
                else:
 
465
                    logger.error(bad_states[state] + ": %r", error)
 
466
            self.cleanup()
211
467
        elif state == avahi.SERVER_RUNNING:
212
 
            self.add()
 
468
            try:
 
469
                self.add()
 
470
            except dbus.exceptions.DBusException as error:
 
471
                if (error.get_dbus_name()
 
472
                    == "org.freedesktop.Avahi.CollisionError"):
 
473
                    logger.info("Local Zeroconf service name"
 
474
                                " collision.")
 
475
                    return self.rename(remove=False)
 
476
                else:
 
477
                    logger.critical("D-Bus Exception", exc_info=error)
 
478
                    self.cleanup()
 
479
                    os._exit(1)
 
480
        else:
 
481
            if error is None:
 
482
                logger.debug("Unknown state: %r", state)
 
483
            else:
 
484
                logger.debug("Unknown state: %r: %r", state, error)
 
485
 
213
486
    def activate(self):
214
487
        """Derived from the Avahi example code"""
215
488
        if self.server is None:
216
489
            self.server = dbus.Interface(
217
 
                bus.get_object(avahi.DBUS_NAME,
218
 
                               avahi.DBUS_PATH_SERVER),
 
490
                self.bus.get_object(avahi.DBUS_NAME,
 
491
                                    avahi.DBUS_PATH_SERVER,
 
492
                                    follow_name_owner_changes=True),
219
493
                avahi.DBUS_INTERFACE_SERVER)
220
 
        self.server.connect_to_signal(u"StateChanged",
221
 
                                 self.server_state_changed)
 
494
        self.server.connect_to_signal("StateChanged",
 
495
                                      self.server_state_changed)
222
496
        self.server_state_changed(self.server.GetState())
223
497
 
224
498
 
 
499
class AvahiServiceToSyslog(AvahiService):
 
500
    def rename(self, *args, **kwargs):
 
501
        """Add the new name to the syslog messages"""
 
502
        ret = super(AvahiServiceToSyslog, self).rename(*args, **kwargs)
 
503
        syslogger.setFormatter(logging.Formatter(
 
504
            'Mandos ({}) [%(process)d]: %(levelname)s: %(message)s'
 
505
            .format(self.name)))
 
506
        return ret
 
507
 
 
508
 
 
509
# Pretend that we have a GnuTLS module
 
510
class gnutls(object):
 
511
    """This isn't so much a class as it is a module-like namespace."""
 
512
 
 
513
    library = ctypes.util.find_library("gnutls")
 
514
    if library is None:
 
515
        library = ctypes.util.find_library("gnutls-deb0")
 
516
    _library = ctypes.cdll.LoadLibrary(library)
 
517
    del library
 
518
 
 
519
    # Unless otherwise indicated, the constants and types below are
 
520
    # all from the gnutls/gnutls.h C header file.
 
521
 
 
522
    # Constants
 
523
    E_SUCCESS = 0
 
524
    E_INTERRUPTED = -52
 
525
    E_AGAIN = -28
 
526
    CRT_OPENPGP = 2
 
527
    CRT_RAWPK = 3
 
528
    CLIENT = 2
 
529
    SHUT_RDWR = 0
 
530
    CRD_CERTIFICATE = 1
 
531
    E_NO_CERTIFICATE_FOUND = -49
 
532
    X509_FMT_DER = 0
 
533
    NO_TICKETS = 1<<10
 
534
    ENABLE_RAWPK = 1<<18
 
535
    CTYPE_PEERS = 3
 
536
    KEYID_USE_SHA256 = 1        # gnutls/x509.h
 
537
    OPENPGP_FMT_RAW = 0         # gnutls/openpgp.h
 
538
 
 
539
    # Types
 
540
    class session_int(ctypes.Structure):
 
541
        _fields_ = []
 
542
    session_t = ctypes.POINTER(session_int)
 
543
 
 
544
    class certificate_credentials_st(ctypes.Structure):
 
545
        _fields_ = []
 
546
    certificate_credentials_t = ctypes.POINTER(
 
547
        certificate_credentials_st)
 
548
    certificate_type_t = ctypes.c_int
 
549
 
 
550
    class datum_t(ctypes.Structure):
 
551
        _fields_ = [('data', ctypes.POINTER(ctypes.c_ubyte)),
 
552
                    ('size', ctypes.c_uint)]
 
553
 
 
554
    class openpgp_crt_int(ctypes.Structure):
 
555
        _fields_ = []
 
556
    openpgp_crt_t = ctypes.POINTER(openpgp_crt_int)
 
557
    openpgp_crt_fmt_t = ctypes.c_int  # gnutls/openpgp.h
 
558
    log_func = ctypes.CFUNCTYPE(None, ctypes.c_int, ctypes.c_char_p)
 
559
    credentials_type_t = ctypes.c_int
 
560
    transport_ptr_t = ctypes.c_void_p
 
561
    close_request_t = ctypes.c_int
 
562
 
 
563
    # Exceptions
 
564
    class Error(Exception):
 
565
        def __init__(self, message=None, code=None, args=()):
 
566
            # Default usage is by a message string, but if a return
 
567
            # code is passed, convert it to a string with
 
568
            # gnutls.strerror()
 
569
            self.code = code
 
570
            if message is None and code is not None:
 
571
                message = gnutls.strerror(code)
 
572
            return super(gnutls.Error, self).__init__(
 
573
                message, *args)
 
574
 
 
575
    class CertificateSecurityError(Error):
 
576
        pass
 
577
 
 
578
    # Classes
 
579
    class Credentials(object):
 
580
        def __init__(self):
 
581
            self._c_object = gnutls.certificate_credentials_t()
 
582
            gnutls.certificate_allocate_credentials(
 
583
                ctypes.byref(self._c_object))
 
584
            self.type = gnutls.CRD_CERTIFICATE
 
585
 
 
586
        def __del__(self):
 
587
            gnutls.certificate_free_credentials(self._c_object)
 
588
 
 
589
    class ClientSession(object):
 
590
        def __init__(self, socket, credentials=None):
 
591
            self._c_object = gnutls.session_t()
 
592
            gnutls_flags = gnutls.CLIENT
 
593
            if gnutls.check_version(b"3.5.6"):
 
594
                gnutls_flags |= gnutls.NO_TICKETS
 
595
            if gnutls.has_rawpk:
 
596
                gnutls_flags |= gnutls.ENABLE_RAWPK
 
597
            gnutls.init(ctypes.byref(self._c_object), gnutls_flags)
 
598
            del gnutls_flags
 
599
            gnutls.set_default_priority(self._c_object)
 
600
            gnutls.transport_set_ptr(self._c_object, socket.fileno())
 
601
            gnutls.handshake_set_private_extensions(self._c_object,
 
602
                                                    True)
 
603
            self.socket = socket
 
604
            if credentials is None:
 
605
                credentials = gnutls.Credentials()
 
606
            gnutls.credentials_set(self._c_object, credentials.type,
 
607
                                   ctypes.cast(credentials._c_object,
 
608
                                               ctypes.c_void_p))
 
609
            self.credentials = credentials
 
610
 
 
611
        def __del__(self):
 
612
            gnutls.deinit(self._c_object)
 
613
 
 
614
        def handshake(self):
 
615
            return gnutls.handshake(self._c_object)
 
616
 
 
617
        def send(self, data):
 
618
            data = bytes(data)
 
619
            data_len = len(data)
 
620
            while data_len > 0:
 
621
                data_len -= gnutls.record_send(self._c_object,
 
622
                                               data[-data_len:],
 
623
                                               data_len)
 
624
 
 
625
        def bye(self):
 
626
            return gnutls.bye(self._c_object, gnutls.SHUT_RDWR)
 
627
 
 
628
    # Error handling functions
 
629
    def _error_code(result):
 
630
        """A function to raise exceptions on errors, suitable
 
631
        for the 'restype' attribute on ctypes functions"""
 
632
        if result >= 0:
 
633
            return result
 
634
        if result == gnutls.E_NO_CERTIFICATE_FOUND:
 
635
            raise gnutls.CertificateSecurityError(code=result)
 
636
        raise gnutls.Error(code=result)
 
637
 
 
638
    def _retry_on_error(result, func, arguments):
 
639
        """A function to retry on some errors, suitable
 
640
        for the 'errcheck' attribute on ctypes functions"""
 
641
        while result < 0:
 
642
            if result not in (gnutls.E_INTERRUPTED, gnutls.E_AGAIN):
 
643
                return _error_code(result)
 
644
            result = func(*arguments)
 
645
        return result
 
646
 
 
647
    # Unless otherwise indicated, the function declarations below are
 
648
    # all from the gnutls/gnutls.h C header file.
 
649
 
 
650
    # Functions
 
651
    priority_set_direct = _library.gnutls_priority_set_direct
 
652
    priority_set_direct.argtypes = [session_t, ctypes.c_char_p,
 
653
                                    ctypes.POINTER(ctypes.c_char_p)]
 
654
    priority_set_direct.restype = _error_code
 
655
 
 
656
    init = _library.gnutls_init
 
657
    init.argtypes = [ctypes.POINTER(session_t), ctypes.c_int]
 
658
    init.restype = _error_code
 
659
 
 
660
    set_default_priority = _library.gnutls_set_default_priority
 
661
    set_default_priority.argtypes = [session_t]
 
662
    set_default_priority.restype = _error_code
 
663
 
 
664
    record_send = _library.gnutls_record_send
 
665
    record_send.argtypes = [session_t, ctypes.c_void_p,
 
666
                            ctypes.c_size_t]
 
667
    record_send.restype = ctypes.c_ssize_t
 
668
    record_send.errcheck = _retry_on_error
 
669
 
 
670
    certificate_allocate_credentials = (
 
671
        _library.gnutls_certificate_allocate_credentials)
 
672
    certificate_allocate_credentials.argtypes = [
 
673
        ctypes.POINTER(certificate_credentials_t)]
 
674
    certificate_allocate_credentials.restype = _error_code
 
675
 
 
676
    certificate_free_credentials = (
 
677
        _library.gnutls_certificate_free_credentials)
 
678
    certificate_free_credentials.argtypes = [
 
679
        certificate_credentials_t]
 
680
    certificate_free_credentials.restype = None
 
681
 
 
682
    handshake_set_private_extensions = (
 
683
        _library.gnutls_handshake_set_private_extensions)
 
684
    handshake_set_private_extensions.argtypes = [session_t,
 
685
                                                 ctypes.c_int]
 
686
    handshake_set_private_extensions.restype = None
 
687
 
 
688
    credentials_set = _library.gnutls_credentials_set
 
689
    credentials_set.argtypes = [session_t, credentials_type_t,
 
690
                                ctypes.c_void_p]
 
691
    credentials_set.restype = _error_code
 
692
 
 
693
    strerror = _library.gnutls_strerror
 
694
    strerror.argtypes = [ctypes.c_int]
 
695
    strerror.restype = ctypes.c_char_p
 
696
 
 
697
    certificate_type_get = _library.gnutls_certificate_type_get
 
698
    certificate_type_get.argtypes = [session_t]
 
699
    certificate_type_get.restype = _error_code
 
700
 
 
701
    certificate_get_peers = _library.gnutls_certificate_get_peers
 
702
    certificate_get_peers.argtypes = [session_t,
 
703
                                      ctypes.POINTER(ctypes.c_uint)]
 
704
    certificate_get_peers.restype = ctypes.POINTER(datum_t)
 
705
 
 
706
    global_set_log_level = _library.gnutls_global_set_log_level
 
707
    global_set_log_level.argtypes = [ctypes.c_int]
 
708
    global_set_log_level.restype = None
 
709
 
 
710
    global_set_log_function = _library.gnutls_global_set_log_function
 
711
    global_set_log_function.argtypes = [log_func]
 
712
    global_set_log_function.restype = None
 
713
 
 
714
    deinit = _library.gnutls_deinit
 
715
    deinit.argtypes = [session_t]
 
716
    deinit.restype = None
 
717
 
 
718
    handshake = _library.gnutls_handshake
 
719
    handshake.argtypes = [session_t]
 
720
    handshake.restype = _error_code
 
721
    handshake.errcheck = _retry_on_error
 
722
 
 
723
    transport_set_ptr = _library.gnutls_transport_set_ptr
 
724
    transport_set_ptr.argtypes = [session_t, transport_ptr_t]
 
725
    transport_set_ptr.restype = None
 
726
 
 
727
    bye = _library.gnutls_bye
 
728
    bye.argtypes = [session_t, close_request_t]
 
729
    bye.restype = _error_code
 
730
    bye.errcheck = _retry_on_error
 
731
 
 
732
    check_version = _library.gnutls_check_version
 
733
    check_version.argtypes = [ctypes.c_char_p]
 
734
    check_version.restype = ctypes.c_char_p
 
735
 
 
736
    _need_version = b"3.3.0"
 
737
    if check_version(_need_version) is None:
 
738
        raise self.Error("Needs GnuTLS {} or later"
 
739
                         .format(_need_version))
 
740
 
 
741
    _tls_rawpk_version = b"3.6.6"
 
742
    has_rawpk = bool(check_version(_tls_rawpk_version))
 
743
 
 
744
    if has_rawpk:
 
745
        # Types
 
746
        class pubkey_st(ctypes.Structure):
 
747
            _fields = []
 
748
        pubkey_t = ctypes.POINTER(pubkey_st)
 
749
 
 
750
        x509_crt_fmt_t = ctypes.c_int
 
751
 
 
752
        # All the function declarations below are from gnutls/abstract.h
 
753
        pubkey_init = _library.gnutls_pubkey_init
 
754
        pubkey_init.argtypes = [ctypes.POINTER(pubkey_t)]
 
755
        pubkey_init.restype = _error_code
 
756
 
 
757
        pubkey_import = _library.gnutls_pubkey_import
 
758
        pubkey_import.argtypes = [pubkey_t, ctypes.POINTER(datum_t),
 
759
                                  x509_crt_fmt_t]
 
760
        pubkey_import.restype = _error_code
 
761
 
 
762
        pubkey_get_key_id = _library.gnutls_pubkey_get_key_id
 
763
        pubkey_get_key_id.argtypes = [pubkey_t, ctypes.c_int,
 
764
                                      ctypes.POINTER(ctypes.c_ubyte),
 
765
                                      ctypes.POINTER(ctypes.c_size_t)]
 
766
        pubkey_get_key_id.restype = _error_code
 
767
 
 
768
        pubkey_deinit = _library.gnutls_pubkey_deinit
 
769
        pubkey_deinit.argtypes = [pubkey_t]
 
770
        pubkey_deinit.restype = None
 
771
    else:
 
772
        # All the function declarations below are from gnutls/openpgp.h
 
773
 
 
774
        openpgp_crt_init = _library.gnutls_openpgp_crt_init
 
775
        openpgp_crt_init.argtypes = [ctypes.POINTER(openpgp_crt_t)]
 
776
        openpgp_crt_init.restype = _error_code
 
777
 
 
778
        openpgp_crt_import = _library.gnutls_openpgp_crt_import
 
779
        openpgp_crt_import.argtypes = [openpgp_crt_t,
 
780
                                       ctypes.POINTER(datum_t),
 
781
                                       openpgp_crt_fmt_t]
 
782
        openpgp_crt_import.restype = _error_code
 
783
 
 
784
        openpgp_crt_verify_self = _library.gnutls_openpgp_crt_verify_self
 
785
        openpgp_crt_verify_self.argtypes = [openpgp_crt_t, ctypes.c_uint,
 
786
                                            ctypes.POINTER(ctypes.c_uint)]
 
787
        openpgp_crt_verify_self.restype = _error_code
 
788
 
 
789
        openpgp_crt_deinit = _library.gnutls_openpgp_crt_deinit
 
790
        openpgp_crt_deinit.argtypes = [openpgp_crt_t]
 
791
        openpgp_crt_deinit.restype = None
 
792
 
 
793
        openpgp_crt_get_fingerprint = (
 
794
            _library.gnutls_openpgp_crt_get_fingerprint)
 
795
        openpgp_crt_get_fingerprint.argtypes = [openpgp_crt_t,
 
796
                                                ctypes.c_void_p,
 
797
                                                ctypes.POINTER(
 
798
                                                    ctypes.c_size_t)]
 
799
        openpgp_crt_get_fingerprint.restype = _error_code
 
800
 
 
801
    if check_version(b"3.6.4"):
 
802
        certificate_type_get2 = _library.gnutls_certificate_type_get2
 
803
        certificate_type_get2.argtypes = [session_t, ctypes.c_int]
 
804
        certificate_type_get2.restype = _error_code
 
805
 
 
806
    # Remove non-public functions
 
807
    del _error_code, _retry_on_error
 
808
 
 
809
 
 
810
def call_pipe(connection,       # : multiprocessing.Connection
 
811
              func, *args, **kwargs):
 
812
    """This function is meant to be called by multiprocessing.Process
 
813
 
 
814
    This function runs func(*args, **kwargs), and writes the resulting
 
815
    return value on the provided multiprocessing.Connection.
 
816
    """
 
817
    connection.send(func(*args, **kwargs))
 
818
    connection.close()
 
819
 
 
820
 
225
821
class Client(object):
226
822
    """A representation of a client host served by this server.
227
 
    
 
823
 
228
824
    Attributes:
 
825
    approved:   bool(); 'None' if not yet approved/disapproved
 
826
    approval_delay: datetime.timedelta(); Time to wait for approval
 
827
    approval_duration: datetime.timedelta(); Duration of one approval
 
828
    checker: multiprocessing.Process(); a running checker process used
 
829
             to see if the client lives. 'None' if no process is
 
830
             running.
 
831
    checker_callback_tag: a GLib event source tag, or None
 
832
    checker_command: string; External command which is run to check
 
833
                     if client lives.  %() expansions are done at
 
834
                     runtime with vars(self) as dict, so that for
 
835
                     instance %(name)s can be used in the command.
 
836
    checker_initiator_tag: a GLib event source tag, or None
 
837
    created:    datetime.datetime(); (UTC) object creation
 
838
    client_structure: Object describing what attributes a client has
 
839
                      and is used for storing the client at exit
 
840
    current_checker_command: string; current running checker_command
 
841
    disable_initiator_tag: a GLib event source tag, or None
 
842
    enabled:    bool()
 
843
    fingerprint: string (40 or 32 hexadecimal digits); used to
 
844
                 uniquely identify an OpenPGP client
 
845
    key_id: string (64 hexadecimal digits); used to uniquely identify
 
846
            a client using raw public keys
 
847
    host:       string; available for use by the checker command
 
848
    interval:   datetime.timedelta(); How often to start a new checker
 
849
    last_approval_request: datetime.datetime(); (UTC) or None
 
850
    last_checked_ok: datetime.datetime(); (UTC) or None
 
851
    last_checker_status: integer between 0 and 255 reflecting exit
 
852
                         status of last checker. -1 reflects crashed
 
853
                         checker, -2 means no checker completed yet.
 
854
    last_checker_signal: The signal which killed the last checker, if
 
855
                         last_checker_status is -1
 
856
    last_enabled: datetime.datetime(); (UTC) or None
229
857
    name:       string; from the config file, used in log messages and
230
858
                        D-Bus identifiers
231
 
    fingerprint: string (40 or 32 hexadecimal digits); used to
232
 
                 uniquely identify the client
233
859
    secret:     bytestring; sent verbatim (over TLS) to client
234
 
    host:       string; available for use by the checker command
235
 
    created:    datetime.datetime(); (UTC) object creation
236
 
    last_enabled: datetime.datetime(); (UTC)
237
 
    enabled:    bool()
238
 
    last_checked_ok: datetime.datetime(); (UTC) or None
239
860
    timeout:    datetime.timedelta(); How long from last_checked_ok
240
 
                                      until this client is invalid
241
 
    interval:   datetime.timedelta(); How often to start a new checker
242
 
    disable_hook:  If set, called by disable() as disable_hook(self)
243
 
    checker:    subprocess.Popen(); a running checker process used
244
 
                                    to see if the client lives.
245
 
                                    'None' if no process is running.
246
 
    checker_initiator_tag: a gobject event source tag, or None
247
 
    disable_initiator_tag:    - '' -
248
 
    checker_callback_tag:  - '' -
249
 
    checker_command: string; External command which is run to check if
250
 
                     client lives.  %() expansions are done at
251
 
                     runtime with vars(self) as dict, so that for
252
 
                     instance %(name)s can be used in the command.
253
 
    current_checker_command: string; current running checker_command
 
861
                                      until this client is disabled
 
862
    extended_timeout:   extra long timeout when secret has been sent
 
863
    runtime_expansions: Allowed attributes for runtime expansion.
 
864
    expires:    datetime.datetime(); time (UTC) when a client will be
 
865
                disabled, or None
 
866
    server_settings: The server_settings dict from main()
254
867
    """
255
 
    
 
868
 
 
869
    runtime_expansions = ("approval_delay", "approval_duration",
 
870
                          "created", "enabled", "expires", "key_id",
 
871
                          "fingerprint", "host", "interval",
 
872
                          "last_approval_request", "last_checked_ok",
 
873
                          "last_enabled", "name", "timeout")
 
874
    client_defaults = {
 
875
        "timeout": "PT5M",
 
876
        "extended_timeout": "PT15M",
 
877
        "interval": "PT2M",
 
878
        "checker": "fping -q -- %%(host)s",
 
879
        "host": "",
 
880
        "approval_delay": "PT0S",
 
881
        "approval_duration": "PT1S",
 
882
        "approved_by_default": "True",
 
883
        "enabled": "True",
 
884
    }
 
885
 
256
886
    @staticmethod
257
 
    def _datetime_to_milliseconds(dt):
258
 
        "Convert a datetime.datetime() to milliseconds"
259
 
        return ((dt.days * 24 * 60 * 60 * 1000)
260
 
                + (dt.seconds * 1000)
261
 
                + (dt.microseconds // 1000))
262
 
    
263
 
    def timeout_milliseconds(self):
264
 
        "Return the 'timeout' attribute in milliseconds"
265
 
        return self._datetime_to_milliseconds(self.timeout)
266
 
    
267
 
    def interval_milliseconds(self):
268
 
        "Return the 'interval' attribute in milliseconds"
269
 
        return self._datetime_to_milliseconds(self.interval)
270
 
    
271
 
    def __init__(self, name = None, disable_hook=None, config=None):
272
 
        """Note: the 'checker' key in 'config' sets the
273
 
        'checker_command' attribute and *not* the 'checker'
274
 
        attribute."""
 
887
    def config_parser(config):
 
888
        """Construct a new dict of client settings of this form:
 
889
        { client_name: {setting_name: value, ...}, ...}
 
890
        with exceptions for any special settings as defined above.
 
891
        NOTE: Must be a pure function. Must return the same result
 
892
        value given the same arguments.
 
893
        """
 
894
        settings = {}
 
895
        for client_name in config.sections():
 
896
            section = dict(config.items(client_name))
 
897
            client = settings[client_name] = {}
 
898
 
 
899
            client["host"] = section["host"]
 
900
            # Reformat values from string types to Python types
 
901
            client["approved_by_default"] = config.getboolean(
 
902
                client_name, "approved_by_default")
 
903
            client["enabled"] = config.getboolean(client_name,
 
904
                                                  "enabled")
 
905
 
 
906
            # Uppercase and remove spaces from key_id and fingerprint
 
907
            # for later comparison purposes with return value from the
 
908
            # key_id() and fingerprint() functions
 
909
            client["key_id"] = (section.get("key_id", "").upper()
 
910
                                .replace(" ", ""))
 
911
            client["fingerprint"] = (section["fingerprint"].upper()
 
912
                                     .replace(" ", ""))
 
913
            if "secret" in section:
 
914
                client["secret"] = codecs.decode(section["secret"]
 
915
                                                 .encode("utf-8"),
 
916
                                                 "base64")
 
917
            elif "secfile" in section:
 
918
                with open(os.path.expanduser(os.path.expandvars
 
919
                                             (section["secfile"])),
 
920
                          "rb") as secfile:
 
921
                    client["secret"] = secfile.read()
 
922
            else:
 
923
                raise TypeError("No secret or secfile for section {}"
 
924
                                .format(section))
 
925
            client["timeout"] = string_to_delta(section["timeout"])
 
926
            client["extended_timeout"] = string_to_delta(
 
927
                section["extended_timeout"])
 
928
            client["interval"] = string_to_delta(section["interval"])
 
929
            client["approval_delay"] = string_to_delta(
 
930
                section["approval_delay"])
 
931
            client["approval_duration"] = string_to_delta(
 
932
                section["approval_duration"])
 
933
            client["checker_command"] = section["checker"]
 
934
            client["last_approval_request"] = None
 
935
            client["last_checked_ok"] = None
 
936
            client["last_checker_status"] = -2
 
937
 
 
938
        return settings
 
939
 
 
940
    def __init__(self, settings, name=None, server_settings=None):
275
941
        self.name = name
276
 
        if config is None:
277
 
            config = {}
278
 
        logger.debug(u"Creating client %r", self.name)
279
 
        # Uppercase and remove spaces from fingerprint for later
280
 
        # comparison purposes with return value from the fingerprint()
281
 
        # function
282
 
        self.fingerprint = (config[u"fingerprint"].upper()
283
 
                            .replace(u" ", u""))
284
 
        logger.debug(u"  Fingerprint: %s", self.fingerprint)
285
 
        if u"secret" in config:
286
 
            self.secret = config[u"secret"].decode(u"base64")
287
 
        elif u"secfile" in config:
288
 
            with closing(open(os.path.expanduser
289
 
                              (os.path.expandvars
290
 
                               (config[u"secfile"])))) as secfile:
291
 
                self.secret = secfile.read()
 
942
        if server_settings is None:
 
943
            server_settings = {}
 
944
        self.server_settings = server_settings
 
945
        # adding all client settings
 
946
        for setting, value in settings.items():
 
947
            setattr(self, setting, value)
 
948
 
 
949
        if self.enabled:
 
950
            if not hasattr(self, "last_enabled"):
 
951
                self.last_enabled = datetime.datetime.utcnow()
 
952
            if not hasattr(self, "expires"):
 
953
                self.expires = (datetime.datetime.utcnow()
 
954
                                + self.timeout)
292
955
        else:
293
 
            raise TypeError(u"No secret or secfile for client %s"
294
 
                            % self.name)
295
 
        self.host = config.get(u"host", u"")
296
 
        self.created = datetime.datetime.utcnow()
297
 
        self.enabled = False
298
 
        self.last_enabled = None
299
 
        self.last_checked_ok = None
300
 
        self.timeout = string_to_delta(config[u"timeout"])
301
 
        self.interval = string_to_delta(config[u"interval"])
302
 
        self.disable_hook = disable_hook
 
956
            self.last_enabled = None
 
957
            self.expires = None
 
958
 
 
959
        logger.debug("Creating client %r", self.name)
 
960
        logger.debug("  Key ID: %s", self.key_id)
 
961
        logger.debug("  Fingerprint: %s", self.fingerprint)
 
962
        self.created = settings.get("created",
 
963
                                    datetime.datetime.utcnow())
 
964
 
 
965
        # attributes specific for this server instance
303
966
        self.checker = None
304
967
        self.checker_initiator_tag = None
305
968
        self.disable_initiator_tag = None
306
969
        self.checker_callback_tag = None
307
 
        self.checker_command = config[u"checker"]
308
970
        self.current_checker_command = None
309
 
        self.last_connect = None
310
 
    
 
971
        self.approved = None
 
972
        self.approvals_pending = 0
 
973
        self.changedstate = multiprocessing_manager.Condition(
 
974
            multiprocessing_manager.Lock())
 
975
        self.client_structure = [attr
 
976
                                 for attr in self.__dict__.keys()
 
977
                                 if not attr.startswith("_")]
 
978
        self.client_structure.append("client_structure")
 
979
 
 
980
        for name, t in inspect.getmembers(
 
981
                type(self), lambda obj: isinstance(obj, property)):
 
982
            if not name.startswith("_"):
 
983
                self.client_structure.append(name)
 
984
 
 
985
    # Send notice to process children that client state has changed
 
986
    def send_changedstate(self):
 
987
        with self.changedstate:
 
988
            self.changedstate.notify_all()
 
989
 
311
990
    def enable(self):
312
991
        """Start this client's checker and timeout hooks"""
 
992
        if getattr(self, "enabled", False):
 
993
            # Already enabled
 
994
            return
 
995
        self.expires = datetime.datetime.utcnow() + self.timeout
 
996
        self.enabled = True
313
997
        self.last_enabled = datetime.datetime.utcnow()
 
998
        self.init_checker()
 
999
        self.send_changedstate()
 
1000
 
 
1001
    def disable(self, quiet=True):
 
1002
        """Disable this client."""
 
1003
        if not getattr(self, "enabled", False):
 
1004
            return False
 
1005
        if not quiet:
 
1006
            logger.info("Disabling client %s", self.name)
 
1007
        if getattr(self, "disable_initiator_tag", None) is not None:
 
1008
            GLib.source_remove(self.disable_initiator_tag)
 
1009
            self.disable_initiator_tag = None
 
1010
        self.expires = None
 
1011
        if getattr(self, "checker_initiator_tag", None) is not None:
 
1012
            GLib.source_remove(self.checker_initiator_tag)
 
1013
            self.checker_initiator_tag = None
 
1014
        self.stop_checker()
 
1015
        self.enabled = False
 
1016
        if not quiet:
 
1017
            self.send_changedstate()
 
1018
        # Do not run this again if called by a GLib.timeout_add
 
1019
        return False
 
1020
 
 
1021
    def __del__(self):
 
1022
        self.disable()
 
1023
 
 
1024
    def init_checker(self):
314
1025
        # Schedule a new checker to be started an 'interval' from now,
315
1026
        # and every interval from then on.
316
 
        self.checker_initiator_tag = (gobject.timeout_add
317
 
                                      (self.interval_milliseconds(),
318
 
                                       self.start_checker))
 
1027
        if self.checker_initiator_tag is not None:
 
1028
            GLib.source_remove(self.checker_initiator_tag)
 
1029
        self.checker_initiator_tag = GLib.timeout_add(
 
1030
            int(self.interval.total_seconds() * 1000),
 
1031
            self.start_checker)
 
1032
        # Schedule a disable() when 'timeout' has passed
 
1033
        if self.disable_initiator_tag is not None:
 
1034
            GLib.source_remove(self.disable_initiator_tag)
 
1035
        self.disable_initiator_tag = GLib.timeout_add(
 
1036
            int(self.timeout.total_seconds() * 1000), self.disable)
319
1037
        # Also start a new checker *right now*.
320
1038
        self.start_checker()
321
 
        # Schedule a disable() when 'timeout' has passed
322
 
        self.disable_initiator_tag = (gobject.timeout_add
323
 
                                   (self.timeout_milliseconds(),
324
 
                                    self.disable))
325
 
        self.enabled = True
326
 
    
327
 
    def disable(self):
328
 
        """Disable this client."""
329
 
        if not getattr(self, "enabled", False):
330
 
            return False
331
 
        logger.info(u"Disabling client %s", self.name)
332
 
        if getattr(self, u"disable_initiator_tag", False):
333
 
            gobject.source_remove(self.disable_initiator_tag)
334
 
            self.disable_initiator_tag = None
335
 
        if getattr(self, u"checker_initiator_tag", False):
336
 
            gobject.source_remove(self.checker_initiator_tag)
337
 
            self.checker_initiator_tag = None
338
 
        self.stop_checker()
339
 
        if self.disable_hook:
340
 
            self.disable_hook(self)
341
 
        self.enabled = False
342
 
        # Do not run this again if called by a gobject.timeout_add
343
 
        return False
344
 
    
345
 
    def __del__(self):
346
 
        self.disable_hook = None
347
 
        self.disable()
348
 
    
349
 
    def checker_callback(self, pid, condition, command):
 
1039
 
 
1040
    def checker_callback(self, source, condition, connection,
 
1041
                         command):
350
1042
        """The checker has completed, so take appropriate actions."""
 
1043
        # Read return code from connection (see call_pipe)
 
1044
        returncode = connection.recv()
 
1045
        connection.close()
 
1046
        self.checker.join()
351
1047
        self.checker_callback_tag = None
352
1048
        self.checker = None
353
 
        if os.WIFEXITED(condition):
354
 
            exitstatus = os.WEXITSTATUS(condition)
355
 
            if exitstatus == 0:
356
 
                logger.info(u"Checker for %(name)s succeeded",
 
1049
 
 
1050
        if returncode >= 0:
 
1051
            self.last_checker_status = returncode
 
1052
            self.last_checker_signal = None
 
1053
            if self.last_checker_status == 0:
 
1054
                logger.info("Checker for %(name)s succeeded",
357
1055
                            vars(self))
358
1056
                self.checked_ok()
359
1057
            else:
360
 
                logger.info(u"Checker for %(name)s failed",
361
 
                            vars(self))
 
1058
                logger.info("Checker for %(name)s failed", vars(self))
362
1059
        else:
363
 
            logger.warning(u"Checker for %(name)s crashed?",
 
1060
            self.last_checker_status = -1
 
1061
            self.last_checker_signal = -returncode
 
1062
            logger.warning("Checker for %(name)s crashed?",
364
1063
                           vars(self))
365
 
    
 
1064
        return False
 
1065
 
366
1066
    def checked_ok(self):
367
 
        """Bump up the timeout for this client.
368
 
        
369
 
        This should only be called when the client has been seen,
370
 
        alive and well.
371
 
        """
 
1067
        """Assert that the client has been seen, alive and well."""
372
1068
        self.last_checked_ok = datetime.datetime.utcnow()
373
 
        gobject.source_remove(self.disable_initiator_tag)
374
 
        self.disable_initiator_tag = (gobject.timeout_add
375
 
                                      (self.timeout_milliseconds(),
376
 
                                       self.disable))
377
 
    
 
1069
        self.last_checker_status = 0
 
1070
        self.last_checker_signal = None
 
1071
        self.bump_timeout()
 
1072
 
 
1073
    def bump_timeout(self, timeout=None):
 
1074
        """Bump up the timeout for this client."""
 
1075
        if timeout is None:
 
1076
            timeout = self.timeout
 
1077
        if self.disable_initiator_tag is not None:
 
1078
            GLib.source_remove(self.disable_initiator_tag)
 
1079
            self.disable_initiator_tag = None
 
1080
        if getattr(self, "enabled", False):
 
1081
            self.disable_initiator_tag = GLib.timeout_add(
 
1082
                int(timeout.total_seconds() * 1000), self.disable)
 
1083
            self.expires = datetime.datetime.utcnow() + timeout
 
1084
 
 
1085
    def need_approval(self):
 
1086
        self.last_approval_request = datetime.datetime.utcnow()
 
1087
 
378
1088
    def start_checker(self):
379
1089
        """Start a new checker subprocess if one is not running.
380
 
        
 
1090
 
381
1091
        If a checker already exists, leave it running and do
382
1092
        nothing."""
383
1093
        # The reason for not killing a running checker is that if we
384
 
        # did that, then if a checker (for some reason) started
385
 
        # running slowly and taking more than 'interval' time, the
386
 
        # client would inevitably timeout, since no checker would get
387
 
        # a chance to run to completion.  If we instead leave running
 
1094
        # did that, and if a checker (for some reason) started running
 
1095
        # slowly and taking more than 'interval' time, then the client
 
1096
        # would inevitably timeout, since no checker would get a
 
1097
        # chance to run to completion.  If we instead leave running
388
1098
        # checkers alone, the checker would have to take more time
389
 
        # than 'timeout' for the client to be declared invalid, which
390
 
        # is as it should be.
391
 
        
392
 
        # If a checker exists, make sure it is not a zombie
393
 
        if self.checker is not None:
394
 
            pid, status = os.waitpid(self.checker.pid, os.WNOHANG)
395
 
            if pid:
396
 
                logger.warning(u"Checker was a zombie")
397
 
                gobject.source_remove(self.checker_callback_tag)
398
 
                self.checker_callback(pid, status,
399
 
                                      self.current_checker_command)
 
1099
        # than 'timeout' for the client to be disabled, which is as it
 
1100
        # should be.
 
1101
 
 
1102
        if self.checker is not None and not self.checker.is_alive():
 
1103
            logger.warning("Checker was not alive; joining")
 
1104
            self.checker.join()
 
1105
            self.checker = None
400
1106
        # Start a new checker if needed
401
1107
        if self.checker is None:
 
1108
            # Escape attributes for the shell
 
1109
            escaped_attrs = {
 
1110
                attr: re.escape(str(getattr(self, attr)))
 
1111
                for attr in self.runtime_expansions}
402
1112
            try:
403
 
                # In case checker_command has exactly one % operator
404
 
                command = self.checker_command % self.host
405
 
            except TypeError:
406
 
                # Escape attributes for the shell
407
 
                escaped_attrs = dict((key,
408
 
                                      re.escape(unicode(str(val),
409
 
                                                        errors=
410
 
                                                        u'replace')))
411
 
                                     for key, val in
412
 
                                     vars(self).iteritems())
413
 
                try:
414
 
                    command = self.checker_command % escaped_attrs
415
 
                except TypeError, error:
416
 
                    logger.error(u'Could not format string "%s":'
417
 
                                 u' %s', self.checker_command, error)
418
 
                    return True # Try again later
 
1113
                command = self.checker_command % escaped_attrs
 
1114
            except TypeError as error:
 
1115
                logger.error('Could not format string "%s"',
 
1116
                             self.checker_command,
 
1117
                             exc_info=error)
 
1118
                return True     # Try again later
419
1119
            self.current_checker_command = command
420
 
            try:
421
 
                logger.info(u"Starting checker %r for %s",
422
 
                            command, self.name)
423
 
                # We don't need to redirect stdout and stderr, since
424
 
                # in normal mode, that is already done by daemon(),
425
 
                # and in debug mode we don't want to.  (Stdin is
426
 
                # always replaced by /dev/null.)
427
 
                self.checker = subprocess.Popen(command,
428
 
                                                close_fds=True,
429
 
                                                shell=True, cwd=u"/")
430
 
                self.checker_callback_tag = (gobject.child_watch_add
431
 
                                             (self.checker.pid,
432
 
                                              self.checker_callback,
433
 
                                              data=command))
434
 
                # The checker may have completed before the gobject
435
 
                # watch was added.  Check for this.
436
 
                pid, status = os.waitpid(self.checker.pid, os.WNOHANG)
437
 
                if pid:
438
 
                    gobject.source_remove(self.checker_callback_tag)
439
 
                    self.checker_callback(pid, status, command)
440
 
            except OSError, error:
441
 
                logger.error(u"Failed to start subprocess: %s",
442
 
                             error)
443
 
        # Re-run this periodically if run by gobject.timeout_add
 
1120
            logger.info("Starting checker %r for %s", command,
 
1121
                        self.name)
 
1122
            # We don't need to redirect stdout and stderr, since
 
1123
            # in normal mode, that is already done by daemon(),
 
1124
            # and in debug mode we don't want to.  (Stdin is
 
1125
            # always replaced by /dev/null.)
 
1126
            # The exception is when not debugging but nevertheless
 
1127
            # running in the foreground; use the previously
 
1128
            # created wnull.
 
1129
            popen_args = {"close_fds": True,
 
1130
                          "shell": True,
 
1131
                          "cwd": "/"}
 
1132
            if (not self.server_settings["debug"]
 
1133
                and self.server_settings["foreground"]):
 
1134
                popen_args.update({"stdout": wnull,
 
1135
                                   "stderr": wnull})
 
1136
            pipe = multiprocessing.Pipe(duplex=False)
 
1137
            self.checker = multiprocessing.Process(
 
1138
                target=call_pipe,
 
1139
                args=(pipe[1], subprocess.call, command),
 
1140
                kwargs=popen_args)
 
1141
            self.checker.start()
 
1142
            self.checker_callback_tag = GLib.io_add_watch(
 
1143
                pipe[0].fileno(), GLib.IO_IN,
 
1144
                self.checker_callback, pipe[0], command)
 
1145
        # Re-run this periodically if run by GLib.timeout_add
444
1146
        return True
445
 
    
 
1147
 
446
1148
    def stop_checker(self):
447
1149
        """Force the checker process, if any, to stop."""
448
1150
        if self.checker_callback_tag:
449
 
            gobject.source_remove(self.checker_callback_tag)
 
1151
            GLib.source_remove(self.checker_callback_tag)
450
1152
            self.checker_callback_tag = None
451
 
        if getattr(self, u"checker", None) is None:
 
1153
        if getattr(self, "checker", None) is None:
452
1154
            return
453
 
        logger.debug(u"Stopping checker for %(name)s", vars(self))
454
 
        try:
455
 
            os.kill(self.checker.pid, signal.SIGTERM)
456
 
            #os.sleep(0.5)
457
 
            #if self.checker.poll() is None:
458
 
            #    os.kill(self.checker.pid, signal.SIGKILL)
459
 
        except OSError, error:
460
 
            if error.errno != errno.ESRCH: # No such process
461
 
                raise
 
1155
        logger.debug("Stopping checker for %(name)s", vars(self))
 
1156
        self.checker.terminate()
462
1157
        self.checker = None
463
 
    
464
 
    def still_valid(self):
465
 
        """Has the timeout not yet passed for this client?"""
466
 
        if not getattr(self, u"enabled", False):
467
 
            return False
468
 
        now = datetime.datetime.utcnow()
469
 
        if self.last_checked_ok is None:
470
 
            return now < (self.created + self.timeout)
471
 
        else:
472
 
            return now < (self.last_checked_ok + self.timeout)
473
 
 
474
 
 
475
 
class ClientDBus(Client, dbus.service.Object):
 
1158
 
 
1159
 
 
1160
def dbus_service_property(dbus_interface,
 
1161
                          signature="v",
 
1162
                          access="readwrite",
 
1163
                          byte_arrays=False):
 
1164
    """Decorators for marking methods of a DBusObjectWithProperties to
 
1165
    become properties on the D-Bus.
 
1166
 
 
1167
    The decorated method will be called with no arguments by "Get"
 
1168
    and with one argument by "Set".
 
1169
 
 
1170
    The parameters, where they are supported, are the same as
 
1171
    dbus.service.method, except there is only "signature", since the
 
1172
    type from Get() and the type sent to Set() is the same.
 
1173
    """
 
1174
    # Encoding deeply encoded byte arrays is not supported yet by the
 
1175
    # "Set" method, so we fail early here:
 
1176
    if byte_arrays and signature != "ay":
 
1177
        raise ValueError("Byte arrays not supported for non-'ay'"
 
1178
                         " signature {!r}".format(signature))
 
1179
 
 
1180
    def decorator(func):
 
1181
        func._dbus_is_property = True
 
1182
        func._dbus_interface = dbus_interface
 
1183
        func._dbus_signature = signature
 
1184
        func._dbus_access = access
 
1185
        func._dbus_name = func.__name__
 
1186
        if func._dbus_name.endswith("_dbus_property"):
 
1187
            func._dbus_name = func._dbus_name[:-14]
 
1188
        func._dbus_get_args_options = {'byte_arrays': byte_arrays}
 
1189
        return func
 
1190
 
 
1191
    return decorator
 
1192
 
 
1193
 
 
1194
def dbus_interface_annotations(dbus_interface):
 
1195
    """Decorator for marking functions returning interface annotations
 
1196
 
 
1197
    Usage:
 
1198
 
 
1199
    @dbus_interface_annotations("org.example.Interface")
 
1200
    def _foo(self):  # Function name does not matter
 
1201
        return {"org.freedesktop.DBus.Deprecated": "true",
 
1202
                "org.freedesktop.DBus.Property.EmitsChangedSignal":
 
1203
                    "false"}
 
1204
    """
 
1205
 
 
1206
    def decorator(func):
 
1207
        func._dbus_is_interface = True
 
1208
        func._dbus_interface = dbus_interface
 
1209
        func._dbus_name = dbus_interface
 
1210
        return func
 
1211
 
 
1212
    return decorator
 
1213
 
 
1214
 
 
1215
def dbus_annotations(annotations):
 
1216
    """Decorator to annotate D-Bus methods, signals or properties
 
1217
    Usage:
 
1218
 
 
1219
    @dbus_annotations({"org.freedesktop.DBus.Deprecated": "true",
 
1220
                       "org.freedesktop.DBus.Property."
 
1221
                       "EmitsChangedSignal": "false"})
 
1222
    @dbus_service_property("org.example.Interface", signature="b",
 
1223
                           access="r")
 
1224
    def Property_dbus_property(self):
 
1225
        return dbus.Boolean(False)
 
1226
 
 
1227
    See also the DBusObjectWithAnnotations class.
 
1228
    """
 
1229
 
 
1230
    def decorator(func):
 
1231
        func._dbus_annotations = annotations
 
1232
        return func
 
1233
 
 
1234
    return decorator
 
1235
 
 
1236
 
 
1237
class DBusPropertyException(dbus.exceptions.DBusException):
 
1238
    """A base class for D-Bus property-related exceptions
 
1239
    """
 
1240
    pass
 
1241
 
 
1242
 
 
1243
class DBusPropertyAccessException(DBusPropertyException):
 
1244
    """A property's access permissions disallows an operation.
 
1245
    """
 
1246
    pass
 
1247
 
 
1248
 
 
1249
class DBusPropertyNotFound(DBusPropertyException):
 
1250
    """An attempt was made to access a non-existing property.
 
1251
    """
 
1252
    pass
 
1253
 
 
1254
 
 
1255
class DBusObjectWithAnnotations(dbus.service.Object):
 
1256
    """A D-Bus object with annotations.
 
1257
 
 
1258
    Classes inheriting from this can use the dbus_annotations
 
1259
    decorator to add annotations to methods or signals.
 
1260
    """
 
1261
 
 
1262
    @staticmethod
 
1263
    def _is_dbus_thing(thing):
 
1264
        """Returns a function testing if an attribute is a D-Bus thing
 
1265
 
 
1266
        If called like _is_dbus_thing("method") it returns a function
 
1267
        suitable for use as predicate to inspect.getmembers().
 
1268
        """
 
1269
        return lambda obj: getattr(obj, "_dbus_is_{}".format(thing),
 
1270
                                   False)
 
1271
 
 
1272
    def _get_all_dbus_things(self, thing):
 
1273
        """Returns a generator of (name, attribute) pairs
 
1274
        """
 
1275
        return ((getattr(athing.__get__(self), "_dbus_name", name),
 
1276
                 athing.__get__(self))
 
1277
                for cls in self.__class__.__mro__
 
1278
                for name, athing in
 
1279
                inspect.getmembers(cls, self._is_dbus_thing(thing)))
 
1280
 
 
1281
    @dbus.service.method(dbus.INTROSPECTABLE_IFACE,
 
1282
                         out_signature="s",
 
1283
                         path_keyword='object_path',
 
1284
                         connection_keyword='connection')
 
1285
    def Introspect(self, object_path, connection):
 
1286
        """Overloading of standard D-Bus method.
 
1287
 
 
1288
        Inserts annotation tags on methods and signals.
 
1289
        """
 
1290
        xmlstring = dbus.service.Object.Introspect(self, object_path,
 
1291
                                                   connection)
 
1292
        try:
 
1293
            document = xml.dom.minidom.parseString(xmlstring)
 
1294
 
 
1295
            for if_tag in document.getElementsByTagName("interface"):
 
1296
                # Add annotation tags
 
1297
                for typ in ("method", "signal"):
 
1298
                    for tag in if_tag.getElementsByTagName(typ):
 
1299
                        annots = dict()
 
1300
                        for name, prop in (self.
 
1301
                                           _get_all_dbus_things(typ)):
 
1302
                            if (name == tag.getAttribute("name")
 
1303
                                and prop._dbus_interface
 
1304
                                == if_tag.getAttribute("name")):
 
1305
                                annots.update(getattr(
 
1306
                                    prop, "_dbus_annotations", {}))
 
1307
                        for name, value in annots.items():
 
1308
                            ann_tag = document.createElement(
 
1309
                                "annotation")
 
1310
                            ann_tag.setAttribute("name", name)
 
1311
                            ann_tag.setAttribute("value", value)
 
1312
                            tag.appendChild(ann_tag)
 
1313
                # Add interface annotation tags
 
1314
                for annotation, value in dict(
 
1315
                    itertools.chain.from_iterable(
 
1316
                        annotations().items()
 
1317
                        for name, annotations
 
1318
                        in self._get_all_dbus_things("interface")
 
1319
                        if name == if_tag.getAttribute("name")
 
1320
                        )).items():
 
1321
                    ann_tag = document.createElement("annotation")
 
1322
                    ann_tag.setAttribute("name", annotation)
 
1323
                    ann_tag.setAttribute("value", value)
 
1324
                    if_tag.appendChild(ann_tag)
 
1325
                # Fix argument name for the Introspect method itself
 
1326
                if (if_tag.getAttribute("name")
 
1327
                    == dbus.INTROSPECTABLE_IFACE):
 
1328
                    for cn in if_tag.getElementsByTagName("method"):
 
1329
                        if cn.getAttribute("name") == "Introspect":
 
1330
                            for arg in cn.getElementsByTagName("arg"):
 
1331
                                if (arg.getAttribute("direction")
 
1332
                                    == "out"):
 
1333
                                    arg.setAttribute("name",
 
1334
                                                     "xml_data")
 
1335
            xmlstring = document.toxml("utf-8")
 
1336
            document.unlink()
 
1337
        except (AttributeError, xml.dom.DOMException,
 
1338
                xml.parsers.expat.ExpatError) as error:
 
1339
            logger.error("Failed to override Introspection method",
 
1340
                         exc_info=error)
 
1341
        return xmlstring
 
1342
 
 
1343
 
 
1344
class DBusObjectWithProperties(DBusObjectWithAnnotations):
 
1345
    """A D-Bus object with properties.
 
1346
 
 
1347
    Classes inheriting from this can use the dbus_service_property
 
1348
    decorator to expose methods as D-Bus properties.  It exposes the
 
1349
    standard Get(), Set(), and GetAll() methods on the D-Bus.
 
1350
    """
 
1351
 
 
1352
    def _get_dbus_property(self, interface_name, property_name):
 
1353
        """Returns a bound method if one exists which is a D-Bus
 
1354
        property with the specified name and interface.
 
1355
        """
 
1356
        for cls in self.__class__.__mro__:
 
1357
            for name, value in inspect.getmembers(
 
1358
                    cls, self._is_dbus_thing("property")):
 
1359
                if (value._dbus_name == property_name
 
1360
                    and value._dbus_interface == interface_name):
 
1361
                    return value.__get__(self)
 
1362
 
 
1363
        # No such property
 
1364
        raise DBusPropertyNotFound("{}:{}.{}".format(
 
1365
            self.dbus_object_path, interface_name, property_name))
 
1366
 
 
1367
    @classmethod
 
1368
    def _get_all_interface_names(cls):
 
1369
        """Get a sequence of all interfaces supported by an object"""
 
1370
        return (name for name in set(getattr(getattr(x, attr),
 
1371
                                             "_dbus_interface", None)
 
1372
                                     for x in (inspect.getmro(cls))
 
1373
                                     for attr in dir(x))
 
1374
                if name is not None)
 
1375
 
 
1376
    @dbus.service.method(dbus.PROPERTIES_IFACE,
 
1377
                         in_signature="ss",
 
1378
                         out_signature="v")
 
1379
    def Get(self, interface_name, property_name):
 
1380
        """Standard D-Bus property Get() method, see D-Bus standard.
 
1381
        """
 
1382
        prop = self._get_dbus_property(interface_name, property_name)
 
1383
        if prop._dbus_access == "write":
 
1384
            raise DBusPropertyAccessException(property_name)
 
1385
        value = prop()
 
1386
        if not hasattr(value, "variant_level"):
 
1387
            return value
 
1388
        return type(value)(value, variant_level=value.variant_level+1)
 
1389
 
 
1390
    @dbus.service.method(dbus.PROPERTIES_IFACE, in_signature="ssv")
 
1391
    def Set(self, interface_name, property_name, value):
 
1392
        """Standard D-Bus property Set() method, see D-Bus standard.
 
1393
        """
 
1394
        prop = self._get_dbus_property(interface_name, property_name)
 
1395
        if prop._dbus_access == "read":
 
1396
            raise DBusPropertyAccessException(property_name)
 
1397
        if prop._dbus_get_args_options["byte_arrays"]:
 
1398
            # The byte_arrays option is not supported yet on
 
1399
            # signatures other than "ay".
 
1400
            if prop._dbus_signature != "ay":
 
1401
                raise ValueError("Byte arrays not supported for non-"
 
1402
                                 "'ay' signature {!r}"
 
1403
                                 .format(prop._dbus_signature))
 
1404
            value = dbus.ByteArray(b''.join(chr(byte)
 
1405
                                            for byte in value))
 
1406
        prop(value)
 
1407
 
 
1408
    @dbus.service.method(dbus.PROPERTIES_IFACE,
 
1409
                         in_signature="s",
 
1410
                         out_signature="a{sv}")
 
1411
    def GetAll(self, interface_name):
 
1412
        """Standard D-Bus property GetAll() method, see D-Bus
 
1413
        standard.
 
1414
 
 
1415
        Note: Will not include properties with access="write".
 
1416
        """
 
1417
        properties = {}
 
1418
        for name, prop in self._get_all_dbus_things("property"):
 
1419
            if (interface_name
 
1420
                and interface_name != prop._dbus_interface):
 
1421
                # Interface non-empty but did not match
 
1422
                continue
 
1423
            # Ignore write-only properties
 
1424
            if prop._dbus_access == "write":
 
1425
                continue
 
1426
            value = prop()
 
1427
            if not hasattr(value, "variant_level"):
 
1428
                properties[name] = value
 
1429
                continue
 
1430
            properties[name] = type(value)(
 
1431
                value, variant_level=value.variant_level + 1)
 
1432
        return dbus.Dictionary(properties, signature="sv")
 
1433
 
 
1434
    @dbus.service.signal(dbus.PROPERTIES_IFACE, signature="sa{sv}as")
 
1435
    def PropertiesChanged(self, interface_name, changed_properties,
 
1436
                          invalidated_properties):
 
1437
        """Standard D-Bus PropertiesChanged() signal, see D-Bus
 
1438
        standard.
 
1439
        """
 
1440
        pass
 
1441
 
 
1442
    @dbus.service.method(dbus.INTROSPECTABLE_IFACE,
 
1443
                         out_signature="s",
 
1444
                         path_keyword='object_path',
 
1445
                         connection_keyword='connection')
 
1446
    def Introspect(self, object_path, connection):
 
1447
        """Overloading of standard D-Bus method.
 
1448
 
 
1449
        Inserts property tags and interface annotation tags.
 
1450
        """
 
1451
        xmlstring = DBusObjectWithAnnotations.Introspect(self,
 
1452
                                                         object_path,
 
1453
                                                         connection)
 
1454
        try:
 
1455
            document = xml.dom.minidom.parseString(xmlstring)
 
1456
 
 
1457
            def make_tag(document, name, prop):
 
1458
                e = document.createElement("property")
 
1459
                e.setAttribute("name", name)
 
1460
                e.setAttribute("type", prop._dbus_signature)
 
1461
                e.setAttribute("access", prop._dbus_access)
 
1462
                return e
 
1463
 
 
1464
            for if_tag in document.getElementsByTagName("interface"):
 
1465
                # Add property tags
 
1466
                for tag in (make_tag(document, name, prop)
 
1467
                            for name, prop
 
1468
                            in self._get_all_dbus_things("property")
 
1469
                            if prop._dbus_interface
 
1470
                            == if_tag.getAttribute("name")):
 
1471
                    if_tag.appendChild(tag)
 
1472
                # Add annotation tags for properties
 
1473
                for tag in if_tag.getElementsByTagName("property"):
 
1474
                    annots = dict()
 
1475
                    for name, prop in self._get_all_dbus_things(
 
1476
                            "property"):
 
1477
                        if (name == tag.getAttribute("name")
 
1478
                            and prop._dbus_interface
 
1479
                            == if_tag.getAttribute("name")):
 
1480
                            annots.update(getattr(
 
1481
                                prop, "_dbus_annotations", {}))
 
1482
                    for name, value in annots.items():
 
1483
                        ann_tag = document.createElement(
 
1484
                            "annotation")
 
1485
                        ann_tag.setAttribute("name", name)
 
1486
                        ann_tag.setAttribute("value", value)
 
1487
                        tag.appendChild(ann_tag)
 
1488
                # Add the names to the return values for the
 
1489
                # "org.freedesktop.DBus.Properties" methods
 
1490
                if (if_tag.getAttribute("name")
 
1491
                    == "org.freedesktop.DBus.Properties"):
 
1492
                    for cn in if_tag.getElementsByTagName("method"):
 
1493
                        if cn.getAttribute("name") == "Get":
 
1494
                            for arg in cn.getElementsByTagName("arg"):
 
1495
                                if (arg.getAttribute("direction")
 
1496
                                    == "out"):
 
1497
                                    arg.setAttribute("name", "value")
 
1498
                        elif cn.getAttribute("name") == "GetAll":
 
1499
                            for arg in cn.getElementsByTagName("arg"):
 
1500
                                if (arg.getAttribute("direction")
 
1501
                                    == "out"):
 
1502
                                    arg.setAttribute("name", "props")
 
1503
            xmlstring = document.toxml("utf-8")
 
1504
            document.unlink()
 
1505
        except (AttributeError, xml.dom.DOMException,
 
1506
                xml.parsers.expat.ExpatError) as error:
 
1507
            logger.error("Failed to override Introspection method",
 
1508
                         exc_info=error)
 
1509
        return xmlstring
 
1510
 
 
1511
 
 
1512
try:
 
1513
    dbus.OBJECT_MANAGER_IFACE
 
1514
except AttributeError:
 
1515
    dbus.OBJECT_MANAGER_IFACE = "org.freedesktop.DBus.ObjectManager"
 
1516
 
 
1517
 
 
1518
class DBusObjectWithObjectManager(DBusObjectWithAnnotations):
 
1519
    """A D-Bus object with an ObjectManager.
 
1520
 
 
1521
    Classes inheriting from this exposes the standard
 
1522
    GetManagedObjects call and the InterfacesAdded and
 
1523
    InterfacesRemoved signals on the standard
 
1524
    "org.freedesktop.DBus.ObjectManager" interface.
 
1525
 
 
1526
    Note: No signals are sent automatically; they must be sent
 
1527
    manually.
 
1528
    """
 
1529
    @dbus.service.method(dbus.OBJECT_MANAGER_IFACE,
 
1530
                         out_signature="a{oa{sa{sv}}}")
 
1531
    def GetManagedObjects(self):
 
1532
        """This function must be overridden"""
 
1533
        raise NotImplementedError()
 
1534
 
 
1535
    @dbus.service.signal(dbus.OBJECT_MANAGER_IFACE,
 
1536
                         signature="oa{sa{sv}}")
 
1537
    def InterfacesAdded(self, object_path, interfaces_and_properties):
 
1538
        pass
 
1539
 
 
1540
    @dbus.service.signal(dbus.OBJECT_MANAGER_IFACE, signature="oas")
 
1541
    def InterfacesRemoved(self, object_path, interfaces):
 
1542
        pass
 
1543
 
 
1544
    @dbus.service.method(dbus.INTROSPECTABLE_IFACE,
 
1545
                         out_signature="s",
 
1546
                         path_keyword='object_path',
 
1547
                         connection_keyword='connection')
 
1548
    def Introspect(self, object_path, connection):
 
1549
        """Overloading of standard D-Bus method.
 
1550
 
 
1551
        Override return argument name of GetManagedObjects to be
 
1552
        "objpath_interfaces_and_properties"
 
1553
        """
 
1554
        xmlstring = DBusObjectWithAnnotations.Introspect(self,
 
1555
                                                         object_path,
 
1556
                                                         connection)
 
1557
        try:
 
1558
            document = xml.dom.minidom.parseString(xmlstring)
 
1559
 
 
1560
            for if_tag in document.getElementsByTagName("interface"):
 
1561
                # Fix argument name for the GetManagedObjects method
 
1562
                if (if_tag.getAttribute("name")
 
1563
                    == dbus.OBJECT_MANAGER_IFACE):
 
1564
                    for cn in if_tag.getElementsByTagName("method"):
 
1565
                        if (cn.getAttribute("name")
 
1566
                            == "GetManagedObjects"):
 
1567
                            for arg in cn.getElementsByTagName("arg"):
 
1568
                                if (arg.getAttribute("direction")
 
1569
                                    == "out"):
 
1570
                                    arg.setAttribute(
 
1571
                                        "name",
 
1572
                                        "objpath_interfaces"
 
1573
                                        "_and_properties")
 
1574
            xmlstring = document.toxml("utf-8")
 
1575
            document.unlink()
 
1576
        except (AttributeError, xml.dom.DOMException,
 
1577
                xml.parsers.expat.ExpatError) as error:
 
1578
            logger.error("Failed to override Introspection method",
 
1579
                         exc_info=error)
 
1580
        return xmlstring
 
1581
 
 
1582
 
 
1583
def datetime_to_dbus(dt, variant_level=0):
 
1584
    """Convert a UTC datetime.datetime() to a D-Bus type."""
 
1585
    if dt is None:
 
1586
        return dbus.String("", variant_level=variant_level)
 
1587
    return dbus.String(dt.isoformat(), variant_level=variant_level)
 
1588
 
 
1589
 
 
1590
def alternate_dbus_interfaces(alt_interface_names, deprecate=True):
 
1591
    """A class decorator; applied to a subclass of
 
1592
    dbus.service.Object, it will add alternate D-Bus attributes with
 
1593
    interface names according to the "alt_interface_names" mapping.
 
1594
    Usage:
 
1595
 
 
1596
    @alternate_dbus_interfaces({"org.example.Interface":
 
1597
                                    "net.example.AlternateInterface"})
 
1598
    class SampleDBusObject(dbus.service.Object):
 
1599
        @dbus.service.method("org.example.Interface")
 
1600
        def SampleDBusMethod():
 
1601
            pass
 
1602
 
 
1603
    The above "SampleDBusMethod" on "SampleDBusObject" will be
 
1604
    reachable via two interfaces: "org.example.Interface" and
 
1605
    "net.example.AlternateInterface", the latter of which will have
 
1606
    its D-Bus annotation "org.freedesktop.DBus.Deprecated" set to
 
1607
    "true", unless "deprecate" is passed with a False value.
 
1608
 
 
1609
    This works for methods and signals, and also for D-Bus properties
 
1610
    (from DBusObjectWithProperties) and interfaces (from the
 
1611
    dbus_interface_annotations decorator).
 
1612
    """
 
1613
 
 
1614
    def wrapper(cls):
 
1615
        for orig_interface_name, alt_interface_name in (
 
1616
                alt_interface_names.items()):
 
1617
            attr = {}
 
1618
            interface_names = set()
 
1619
            # Go though all attributes of the class
 
1620
            for attrname, attribute in inspect.getmembers(cls):
 
1621
                # Ignore non-D-Bus attributes, and D-Bus attributes
 
1622
                # with the wrong interface name
 
1623
                if (not hasattr(attribute, "_dbus_interface")
 
1624
                    or not attribute._dbus_interface.startswith(
 
1625
                        orig_interface_name)):
 
1626
                    continue
 
1627
                # Create an alternate D-Bus interface name based on
 
1628
                # the current name
 
1629
                alt_interface = attribute._dbus_interface.replace(
 
1630
                    orig_interface_name, alt_interface_name)
 
1631
                interface_names.add(alt_interface)
 
1632
                # Is this a D-Bus signal?
 
1633
                if getattr(attribute, "_dbus_is_signal", False):
 
1634
                    # Extract the original non-method undecorated
 
1635
                    # function by black magic
 
1636
                    if sys.version_info.major == 2:
 
1637
                        nonmethod_func = (dict(
 
1638
                            zip(attribute.func_code.co_freevars,
 
1639
                                attribute.__closure__))
 
1640
                                          ["func"].cell_contents)
 
1641
                    else:
 
1642
                        nonmethod_func = (dict(
 
1643
                            zip(attribute.__code__.co_freevars,
 
1644
                                attribute.__closure__))
 
1645
                                          ["func"].cell_contents)
 
1646
                    # Create a new, but exactly alike, function
 
1647
                    # object, and decorate it to be a new D-Bus signal
 
1648
                    # with the alternate D-Bus interface name
 
1649
                    new_function = copy_function(nonmethod_func)
 
1650
                    new_function = (dbus.service.signal(
 
1651
                        alt_interface,
 
1652
                        attribute._dbus_signature)(new_function))
 
1653
                    # Copy annotations, if any
 
1654
                    try:
 
1655
                        new_function._dbus_annotations = dict(
 
1656
                            attribute._dbus_annotations)
 
1657
                    except AttributeError:
 
1658
                        pass
 
1659
 
 
1660
                    # Define a creator of a function to call both the
 
1661
                    # original and alternate functions, so both the
 
1662
                    # original and alternate signals gets sent when
 
1663
                    # the function is called
 
1664
                    def fixscope(func1, func2):
 
1665
                        """This function is a scope container to pass
 
1666
                        func1 and func2 to the "call_both" function
 
1667
                        outside of its arguments"""
 
1668
 
 
1669
                        @functools.wraps(func2)
 
1670
                        def call_both(*args, **kwargs):
 
1671
                            """This function will emit two D-Bus
 
1672
                            signals by calling func1 and func2"""
 
1673
                            func1(*args, **kwargs)
 
1674
                            func2(*args, **kwargs)
 
1675
                        # Make wrapper function look like a D-Bus
 
1676
                        # signal
 
1677
                        for name, attr in inspect.getmembers(func2):
 
1678
                            if name.startswith("_dbus_"):
 
1679
                                setattr(call_both, name, attr)
 
1680
 
 
1681
                        return call_both
 
1682
                    # Create the "call_both" function and add it to
 
1683
                    # the class
 
1684
                    attr[attrname] = fixscope(attribute, new_function)
 
1685
                # Is this a D-Bus method?
 
1686
                elif getattr(attribute, "_dbus_is_method", False):
 
1687
                    # Create a new, but exactly alike, function
 
1688
                    # object.  Decorate it to be a new D-Bus method
 
1689
                    # with the alternate D-Bus interface name.  Add it
 
1690
                    # to the class.
 
1691
                    attr[attrname] = (
 
1692
                        dbus.service.method(
 
1693
                            alt_interface,
 
1694
                            attribute._dbus_in_signature,
 
1695
                            attribute._dbus_out_signature)
 
1696
                        (copy_function(attribute)))
 
1697
                    # Copy annotations, if any
 
1698
                    try:
 
1699
                        attr[attrname]._dbus_annotations = dict(
 
1700
                            attribute._dbus_annotations)
 
1701
                    except AttributeError:
 
1702
                        pass
 
1703
                # Is this a D-Bus property?
 
1704
                elif getattr(attribute, "_dbus_is_property", False):
 
1705
                    # Create a new, but exactly alike, function
 
1706
                    # object, and decorate it to be a new D-Bus
 
1707
                    # property with the alternate D-Bus interface
 
1708
                    # name.  Add it to the class.
 
1709
                    attr[attrname] = (dbus_service_property(
 
1710
                        alt_interface, attribute._dbus_signature,
 
1711
                        attribute._dbus_access,
 
1712
                        attribute._dbus_get_args_options
 
1713
                        ["byte_arrays"])
 
1714
                                      (copy_function(attribute)))
 
1715
                    # Copy annotations, if any
 
1716
                    try:
 
1717
                        attr[attrname]._dbus_annotations = dict(
 
1718
                            attribute._dbus_annotations)
 
1719
                    except AttributeError:
 
1720
                        pass
 
1721
                # Is this a D-Bus interface?
 
1722
                elif getattr(attribute, "_dbus_is_interface", False):
 
1723
                    # Create a new, but exactly alike, function
 
1724
                    # object.  Decorate it to be a new D-Bus interface
 
1725
                    # with the alternate D-Bus interface name.  Add it
 
1726
                    # to the class.
 
1727
                    attr[attrname] = (
 
1728
                        dbus_interface_annotations(alt_interface)
 
1729
                        (copy_function(attribute)))
 
1730
            if deprecate:
 
1731
                # Deprecate all alternate interfaces
 
1732
                iname = "_AlternateDBusNames_interface_annotation{}"
 
1733
                for interface_name in interface_names:
 
1734
 
 
1735
                    @dbus_interface_annotations(interface_name)
 
1736
                    def func(self):
 
1737
                        return {"org.freedesktop.DBus.Deprecated":
 
1738
                                "true"}
 
1739
                    # Find an unused name
 
1740
                    for aname in (iname.format(i)
 
1741
                                  for i in itertools.count()):
 
1742
                        if aname not in attr:
 
1743
                            attr[aname] = func
 
1744
                            break
 
1745
            if interface_names:
 
1746
                # Replace the class with a new subclass of it with
 
1747
                # methods, signals, etc. as created above.
 
1748
                if sys.version_info.major == 2:
 
1749
                    cls = type(b"{}Alternate".format(cls.__name__),
 
1750
                               (cls, ), attr)
 
1751
                else:
 
1752
                    cls = type("{}Alternate".format(cls.__name__),
 
1753
                               (cls, ), attr)
 
1754
        return cls
 
1755
 
 
1756
    return wrapper
 
1757
 
 
1758
 
 
1759
@alternate_dbus_interfaces({"se.recompile.Mandos":
 
1760
                            "se.bsnet.fukt.Mandos"})
 
1761
class ClientDBus(Client, DBusObjectWithProperties):
476
1762
    """A Client class using D-Bus
477
 
    
 
1763
 
478
1764
    Attributes:
479
 
    dbus_object_path: dbus.ObjectPath ; only set if self.use_dbus
 
1765
    dbus_object_path: dbus.ObjectPath
 
1766
    bus: dbus.SystemBus()
480
1767
    """
 
1768
 
 
1769
    runtime_expansions = (Client.runtime_expansions
 
1770
                          + ("dbus_object_path", ))
 
1771
 
 
1772
    _interface = "se.recompile.Mandos.Client"
 
1773
 
481
1774
    # dbus.service.Object doesn't use super(), so we can't either.
482
 
    
483
 
    def __init__(self, *args, **kwargs):
 
1775
 
 
1776
    def __init__(self, bus=None, *args, **kwargs):
 
1777
        self.bus = bus
484
1778
        Client.__init__(self, *args, **kwargs)
485
1779
        # Only now, when this client is initialized, can it show up on
486
1780
        # the D-Bus
487
 
        self.dbus_object_path = (dbus.ObjectPath
488
 
                                 (u"/clients/"
489
 
                                  + self.name.replace(u".", u"_")))
490
 
        dbus.service.Object.__init__(self, bus,
491
 
                                     self.dbus_object_path)
492
 
    
493
 
    @staticmethod
494
 
    def _datetime_to_dbus(dt, variant_level=0):
495
 
        """Convert a UTC datetime.datetime() to a D-Bus type."""
496
 
        return dbus.String(dt.isoformat(),
497
 
                           variant_level=variant_level)
498
 
    
499
 
    def enable(self):
500
 
        oldstate = getattr(self, u"enabled", False)
501
 
        r = Client.enable(self)
502
 
        if oldstate != self.enabled:
503
 
            # Emit D-Bus signals
504
 
            self.PropertyChanged(dbus.String(u"enabled"),
505
 
                                 dbus.Boolean(True, variant_level=1))
506
 
            self.PropertyChanged(
507
 
                dbus.String(u"last_enabled"),
508
 
                self._datetime_to_dbus(self.last_enabled,
509
 
                                       variant_level=1))
510
 
        return r
511
 
    
512
 
    def disable(self, signal = True):
513
 
        oldstate = getattr(self, u"enabled", False)
514
 
        r = Client.disable(self)
515
 
        if signal and oldstate != self.enabled:
516
 
            # Emit D-Bus signal
517
 
            self.PropertyChanged(dbus.String(u"enabled"),
518
 
                                 dbus.Boolean(False, variant_level=1))
519
 
        return r
520
 
    
 
1781
        client_object_name = str(self.name).translate(
 
1782
            {ord("."): ord("_"),
 
1783
             ord("-"): ord("_")})
 
1784
        self.dbus_object_path = dbus.ObjectPath(
 
1785
            "/clients/" + client_object_name)
 
1786
        DBusObjectWithProperties.__init__(self, self.bus,
 
1787
                                          self.dbus_object_path)
 
1788
 
 
1789
    def notifychangeproperty(transform_func, dbus_name,
 
1790
                             type_func=lambda x: x,
 
1791
                             variant_level=1,
 
1792
                             invalidate_only=False,
 
1793
                             _interface=_interface):
 
1794
        """ Modify a variable so that it's a property which announces
 
1795
        its changes to DBus.
 
1796
 
 
1797
        transform_fun: Function that takes a value and a variant_level
 
1798
                       and transforms it to a D-Bus type.
 
1799
        dbus_name: D-Bus name of the variable
 
1800
        type_func: Function that transform the value before sending it
 
1801
                   to the D-Bus.  Default: no transform
 
1802
        variant_level: D-Bus variant level.  Default: 1
 
1803
        """
 
1804
        attrname = "_{}".format(dbus_name)
 
1805
 
 
1806
        def setter(self, value):
 
1807
            if hasattr(self, "dbus_object_path"):
 
1808
                if (not hasattr(self, attrname) or
 
1809
                    type_func(getattr(self, attrname, None))
 
1810
                    != type_func(value)):
 
1811
                    if invalidate_only:
 
1812
                        self.PropertiesChanged(
 
1813
                            _interface, dbus.Dictionary(),
 
1814
                            dbus.Array((dbus_name, )))
 
1815
                    else:
 
1816
                        dbus_value = transform_func(
 
1817
                            type_func(value),
 
1818
                            variant_level=variant_level)
 
1819
                        self.PropertyChanged(dbus.String(dbus_name),
 
1820
                                             dbus_value)
 
1821
                        self.PropertiesChanged(
 
1822
                            _interface,
 
1823
                            dbus.Dictionary({dbus.String(dbus_name):
 
1824
                                             dbus_value}),
 
1825
                            dbus.Array())
 
1826
            setattr(self, attrname, value)
 
1827
 
 
1828
        return property(lambda self: getattr(self, attrname), setter)
 
1829
 
 
1830
    expires = notifychangeproperty(datetime_to_dbus, "Expires")
 
1831
    approvals_pending = notifychangeproperty(dbus.Boolean,
 
1832
                                             "ApprovalPending",
 
1833
                                             type_func=bool)
 
1834
    enabled = notifychangeproperty(dbus.Boolean, "Enabled")
 
1835
    last_enabled = notifychangeproperty(datetime_to_dbus,
 
1836
                                        "LastEnabled")
 
1837
    checker = notifychangeproperty(
 
1838
        dbus.Boolean, "CheckerRunning",
 
1839
        type_func=lambda checker: checker is not None)
 
1840
    last_checked_ok = notifychangeproperty(datetime_to_dbus,
 
1841
                                           "LastCheckedOK")
 
1842
    last_checker_status = notifychangeproperty(dbus.Int16,
 
1843
                                               "LastCheckerStatus")
 
1844
    last_approval_request = notifychangeproperty(
 
1845
        datetime_to_dbus, "LastApprovalRequest")
 
1846
    approved_by_default = notifychangeproperty(dbus.Boolean,
 
1847
                                               "ApprovedByDefault")
 
1848
    approval_delay = notifychangeproperty(
 
1849
        dbus.UInt64, "ApprovalDelay",
 
1850
        type_func=lambda td: td.total_seconds() * 1000)
 
1851
    approval_duration = notifychangeproperty(
 
1852
        dbus.UInt64, "ApprovalDuration",
 
1853
        type_func=lambda td: td.total_seconds() * 1000)
 
1854
    host = notifychangeproperty(dbus.String, "Host")
 
1855
    timeout = notifychangeproperty(
 
1856
        dbus.UInt64, "Timeout",
 
1857
        type_func=lambda td: td.total_seconds() * 1000)
 
1858
    extended_timeout = notifychangeproperty(
 
1859
        dbus.UInt64, "ExtendedTimeout",
 
1860
        type_func=lambda td: td.total_seconds() * 1000)
 
1861
    interval = notifychangeproperty(
 
1862
        dbus.UInt64, "Interval",
 
1863
        type_func=lambda td: td.total_seconds() * 1000)
 
1864
    checker_command = notifychangeproperty(dbus.String, "Checker")
 
1865
    secret = notifychangeproperty(dbus.ByteArray, "Secret",
 
1866
                                  invalidate_only=True)
 
1867
 
 
1868
    del notifychangeproperty
 
1869
 
521
1870
    def __del__(self, *args, **kwargs):
522
1871
        try:
523
1872
            self.remove_from_connection()
524
1873
        except LookupError:
525
1874
            pass
526
 
        if hasattr(dbus.service.Object, u"__del__"):
527
 
            dbus.service.Object.__del__(self, *args, **kwargs)
 
1875
        if hasattr(DBusObjectWithProperties, "__del__"):
 
1876
            DBusObjectWithProperties.__del__(self, *args, **kwargs)
528
1877
        Client.__del__(self, *args, **kwargs)
529
 
    
530
 
    def checker_callback(self, pid, condition, command,
531
 
                         *args, **kwargs):
532
 
        self.checker_callback_tag = None
533
 
        self.checker = None
534
 
        # Emit D-Bus signal
535
 
        self.PropertyChanged(dbus.String(u"checker_running"),
536
 
                             dbus.Boolean(False, variant_level=1))
537
 
        if os.WIFEXITED(condition):
538
 
            exitstatus = os.WEXITSTATUS(condition)
 
1878
 
 
1879
    def checker_callback(self, source, condition,
 
1880
                         connection, command, *args, **kwargs):
 
1881
        ret = Client.checker_callback(self, source, condition,
 
1882
                                      connection, command, *args,
 
1883
                                      **kwargs)
 
1884
        exitstatus = self.last_checker_status
 
1885
        if exitstatus >= 0:
539
1886
            # Emit D-Bus signal
540
1887
            self.CheckerCompleted(dbus.Int16(exitstatus),
541
 
                                  dbus.Int64(condition),
 
1888
                                  # This is specific to GNU libC
 
1889
                                  dbus.Int64(exitstatus << 8),
542
1890
                                  dbus.String(command))
543
1891
        else:
544
1892
            # Emit D-Bus signal
545
1893
            self.CheckerCompleted(dbus.Int16(-1),
546
 
                                  dbus.Int64(condition),
 
1894
                                  dbus.Int64(
 
1895
                                      # This is specific to GNU libC
 
1896
                                      (exitstatus << 8)
 
1897
                                      | self.last_checker_signal),
547
1898
                                  dbus.String(command))
548
 
        
549
 
        return Client.checker_callback(self, pid, condition, command,
550
 
                                       *args, **kwargs)
551
 
    
552
 
    def checked_ok(self, *args, **kwargs):
553
 
        r = Client.checked_ok(self, *args, **kwargs)
554
 
        # Emit D-Bus signal
555
 
        self.PropertyChanged(
556
 
            dbus.String(u"last_checked_ok"),
557
 
            (self._datetime_to_dbus(self.last_checked_ok,
558
 
                                    variant_level=1)))
559
 
        return r
560
 
    
 
1899
        return ret
 
1900
 
561
1901
    def start_checker(self, *args, **kwargs):
562
 
        old_checker = self.checker
563
 
        if self.checker is not None:
564
 
            old_checker_pid = self.checker.pid
565
 
        else:
566
 
            old_checker_pid = None
 
1902
        old_checker_pid = getattr(self.checker, "pid", None)
567
1903
        r = Client.start_checker(self, *args, **kwargs)
568
1904
        # Only if new checker process was started
569
1905
        if (self.checker is not None
570
1906
            and old_checker_pid != self.checker.pid):
571
1907
            # Emit D-Bus signal
572
1908
            self.CheckerStarted(self.current_checker_command)
573
 
            self.PropertyChanged(
574
 
                dbus.String(u"checker_running"),
575
 
                dbus.Boolean(True, variant_level=1))
576
 
        return r
577
 
    
578
 
    def stop_checker(self, *args, **kwargs):
579
 
        old_checker = getattr(self, u"checker", None)
580
 
        r = Client.stop_checker(self, *args, **kwargs)
581
 
        if (old_checker is not None
582
 
            and getattr(self, u"checker", None) is None):
583
 
            self.PropertyChanged(dbus.String(u"checker_running"),
584
 
                                 dbus.Boolean(False, variant_level=1))
585
 
        return r
586
 
    
587
 
    ## D-Bus methods & signals
588
 
    _interface = u"se.bsnet.fukt.Mandos.Client"
589
 
    
590
 
    # CheckedOK - method
591
 
    @dbus.service.method(_interface)
592
 
    def CheckedOK(self):
593
 
        return self.checked_ok()
594
 
    
 
1909
        return r
 
1910
 
 
1911
    def _reset_approved(self):
 
1912
        self.approved = None
 
1913
        return False
 
1914
 
 
1915
    def approve(self, value=True):
 
1916
        self.approved = value
 
1917
        GLib.timeout_add(int(self.approval_duration.total_seconds()
 
1918
                             * 1000), self._reset_approved)
 
1919
        self.send_changedstate()
 
1920
 
 
1921
    #  D-Bus methods, signals & properties
 
1922
 
 
1923
    #  Interfaces
 
1924
 
 
1925
    #  Signals
 
1926
 
595
1927
    # CheckerCompleted - signal
596
 
    @dbus.service.signal(_interface, signature=u"nxs")
 
1928
    @dbus.service.signal(_interface, signature="nxs")
597
1929
    def CheckerCompleted(self, exitcode, waitstatus, command):
598
1930
        "D-Bus signal"
599
1931
        pass
600
 
    
 
1932
 
601
1933
    # CheckerStarted - signal
602
 
    @dbus.service.signal(_interface, signature=u"s")
 
1934
    @dbus.service.signal(_interface, signature="s")
603
1935
    def CheckerStarted(self, command):
604
1936
        "D-Bus signal"
605
1937
        pass
606
 
    
607
 
    # GetAllProperties - method
608
 
    @dbus.service.method(_interface, out_signature=u"a{sv}")
609
 
    def GetAllProperties(self):
610
 
        "D-Bus method"
611
 
        return dbus.Dictionary({
612
 
                dbus.String(u"name"):
613
 
                    dbus.String(self.name, variant_level=1),
614
 
                dbus.String(u"fingerprint"):
615
 
                    dbus.String(self.fingerprint, variant_level=1),
616
 
                dbus.String(u"host"):
617
 
                    dbus.String(self.host, variant_level=1),
618
 
                dbus.String(u"created"):
619
 
                    self._datetime_to_dbus(self.created,
620
 
                                           variant_level=1),
621
 
                dbus.String(u"last_enabled"):
622
 
                    (self._datetime_to_dbus(self.last_enabled,
623
 
                                            variant_level=1)
624
 
                     if self.last_enabled is not None
625
 
                     else dbus.Boolean(False, variant_level=1)),
626
 
                dbus.String(u"enabled"):
627
 
                    dbus.Boolean(self.enabled, variant_level=1),
628
 
                dbus.String(u"last_checked_ok"):
629
 
                    (self._datetime_to_dbus(self.last_checked_ok,
630
 
                                            variant_level=1)
631
 
                     if self.last_checked_ok is not None
632
 
                     else dbus.Boolean (False, variant_level=1)),
633
 
                dbus.String(u"timeout"):
634
 
                    dbus.UInt64(self.timeout_milliseconds(),
635
 
                                variant_level=1),
636
 
                dbus.String(u"interval"):
637
 
                    dbus.UInt64(self.interval_milliseconds(),
638
 
                                variant_level=1),
639
 
                dbus.String(u"checker"):
640
 
                    dbus.String(self.checker_command,
641
 
                                variant_level=1),
642
 
                dbus.String(u"checker_running"):
643
 
                    dbus.Boolean(self.checker is not None,
644
 
                                 variant_level=1),
645
 
                dbus.String(u"object_path"):
646
 
                    dbus.ObjectPath(self.dbus_object_path,
647
 
                                    variant_level=1)
648
 
                }, signature=u"sv")
649
 
    
650
 
    # IsStillValid - method
651
 
    @dbus.service.method(_interface, out_signature=u"b")
652
 
    def IsStillValid(self):
653
 
        return self.still_valid()
654
 
    
 
1938
 
655
1939
    # PropertyChanged - signal
656
 
    @dbus.service.signal(_interface, signature=u"sv")
 
1940
    @dbus_annotations({"org.freedesktop.DBus.Deprecated": "true"})
 
1941
    @dbus.service.signal(_interface, signature="sv")
657
1942
    def PropertyChanged(self, property, value):
658
1943
        "D-Bus signal"
659
1944
        pass
660
 
    
661
 
    # ReceivedSecret - signal
 
1945
 
 
1946
    # GotSecret - signal
662
1947
    @dbus.service.signal(_interface)
663
 
    def ReceivedSecret(self):
664
 
        "D-Bus signal"
 
1948
    def GotSecret(self):
 
1949
        """D-Bus signal
 
1950
        Is sent after a successful transfer of secret from the Mandos
 
1951
        server to mandos-client
 
1952
        """
665
1953
        pass
666
 
    
 
1954
 
667
1955
    # Rejected - signal
668
 
    @dbus.service.signal(_interface)
669
 
    def Rejected(self):
 
1956
    @dbus.service.signal(_interface, signature="s")
 
1957
    def Rejected(self, reason):
670
1958
        "D-Bus signal"
671
1959
        pass
672
 
    
673
 
    # SetChecker - method
674
 
    @dbus.service.method(_interface, in_signature=u"s")
675
 
    def SetChecker(self, checker):
676
 
        "D-Bus setter method"
677
 
        self.checker_command = checker
678
 
        # Emit D-Bus signal
679
 
        self.PropertyChanged(dbus.String(u"checker"),
680
 
                             dbus.String(self.checker_command,
681
 
                                         variant_level=1))
682
 
    
683
 
    # SetHost - method
684
 
    @dbus.service.method(_interface, in_signature=u"s")
685
 
    def SetHost(self, host):
686
 
        "D-Bus setter method"
687
 
        self.host = host
688
 
        # Emit D-Bus signal
689
 
        self.PropertyChanged(dbus.String(u"host"),
690
 
                             dbus.String(self.host, variant_level=1))
691
 
    
692
 
    # SetInterval - method
693
 
    @dbus.service.method(_interface, in_signature=u"t")
694
 
    def SetInterval(self, milliseconds):
695
 
        self.interval = datetime.timedelta(0, 0, 0, milliseconds)
696
 
        # Emit D-Bus signal
697
 
        self.PropertyChanged(dbus.String(u"interval"),
698
 
                             (dbus.UInt64(self.interval_milliseconds(),
699
 
                                          variant_level=1)))
700
 
    
701
 
    # SetSecret - method
702
 
    @dbus.service.method(_interface, in_signature=u"ay",
703
 
                         byte_arrays=True)
704
 
    def SetSecret(self, secret):
705
 
        "D-Bus setter method"
706
 
        self.secret = str(secret)
707
 
    
708
 
    # SetTimeout - method
709
 
    @dbus.service.method(_interface, in_signature=u"t")
710
 
    def SetTimeout(self, milliseconds):
711
 
        self.timeout = datetime.timedelta(0, 0, 0, milliseconds)
712
 
        # Emit D-Bus signal
713
 
        self.PropertyChanged(dbus.String(u"timeout"),
714
 
                             (dbus.UInt64(self.timeout_milliseconds(),
715
 
                                          variant_level=1)))
716
 
    
 
1960
 
 
1961
    # NeedApproval - signal
 
1962
    @dbus.service.signal(_interface, signature="tb")
 
1963
    def NeedApproval(self, timeout, default):
 
1964
        "D-Bus signal"
 
1965
        return self.need_approval()
 
1966
 
 
1967
    #  Methods
 
1968
 
 
1969
    # Approve - method
 
1970
    @dbus.service.method(_interface, in_signature="b")
 
1971
    def Approve(self, value):
 
1972
        self.approve(value)
 
1973
 
 
1974
    # CheckedOK - method
 
1975
    @dbus.service.method(_interface)
 
1976
    def CheckedOK(self):
 
1977
        self.checked_ok()
 
1978
 
717
1979
    # Enable - method
 
1980
    @dbus_annotations({"org.freedesktop.DBus.Deprecated": "true"})
718
1981
    @dbus.service.method(_interface)
719
1982
    def Enable(self):
720
1983
        "D-Bus method"
721
1984
        self.enable()
722
 
    
 
1985
 
723
1986
    # StartChecker - method
 
1987
    @dbus_annotations({"org.freedesktop.DBus.Deprecated": "true"})
724
1988
    @dbus.service.method(_interface)
725
1989
    def StartChecker(self):
726
1990
        "D-Bus method"
727
1991
        self.start_checker()
728
 
    
 
1992
 
729
1993
    # Disable - method
 
1994
    @dbus_annotations({"org.freedesktop.DBus.Deprecated": "true"})
730
1995
    @dbus.service.method(_interface)
731
1996
    def Disable(self):
732
1997
        "D-Bus method"
733
1998
        self.disable()
734
 
    
 
1999
 
735
2000
    # StopChecker - method
 
2001
    @dbus_annotations({"org.freedesktop.DBus.Deprecated": "true"})
736
2002
    @dbus.service.method(_interface)
737
2003
    def StopChecker(self):
738
2004
        self.stop_checker()
739
 
    
 
2005
 
 
2006
    #  Properties
 
2007
 
 
2008
    # ApprovalPending - property
 
2009
    @dbus_service_property(_interface, signature="b", access="read")
 
2010
    def ApprovalPending_dbus_property(self):
 
2011
        return dbus.Boolean(bool(self.approvals_pending))
 
2012
 
 
2013
    # ApprovedByDefault - property
 
2014
    @dbus_service_property(_interface,
 
2015
                           signature="b",
 
2016
                           access="readwrite")
 
2017
    def ApprovedByDefault_dbus_property(self, value=None):
 
2018
        if value is None:       # get
 
2019
            return dbus.Boolean(self.approved_by_default)
 
2020
        self.approved_by_default = bool(value)
 
2021
 
 
2022
    # ApprovalDelay - property
 
2023
    @dbus_service_property(_interface,
 
2024
                           signature="t",
 
2025
                           access="readwrite")
 
2026
    def ApprovalDelay_dbus_property(self, value=None):
 
2027
        if value is None:       # get
 
2028
            return dbus.UInt64(self.approval_delay.total_seconds()
 
2029
                               * 1000)
 
2030
        self.approval_delay = datetime.timedelta(0, 0, 0, value)
 
2031
 
 
2032
    # ApprovalDuration - property
 
2033
    @dbus_service_property(_interface,
 
2034
                           signature="t",
 
2035
                           access="readwrite")
 
2036
    def ApprovalDuration_dbus_property(self, value=None):
 
2037
        if value is None:       # get
 
2038
            return dbus.UInt64(self.approval_duration.total_seconds()
 
2039
                               * 1000)
 
2040
        self.approval_duration = datetime.timedelta(0, 0, 0, value)
 
2041
 
 
2042
    # Name - property
 
2043
    @dbus_annotations(
 
2044
        {"org.freedesktop.DBus.Property.EmitsChangedSignal": "const"})
 
2045
    @dbus_service_property(_interface, signature="s", access="read")
 
2046
    def Name_dbus_property(self):
 
2047
        return dbus.String(self.name)
 
2048
 
 
2049
    # KeyID - property
 
2050
    @dbus_annotations(
 
2051
        {"org.freedesktop.DBus.Property.EmitsChangedSignal": "const"})
 
2052
    @dbus_service_property(_interface, signature="s", access="read")
 
2053
    def KeyID_dbus_property(self):
 
2054
        return dbus.String(self.key_id)
 
2055
 
 
2056
    # Fingerprint - property
 
2057
    @dbus_annotations(
 
2058
        {"org.freedesktop.DBus.Property.EmitsChangedSignal": "const"})
 
2059
    @dbus_service_property(_interface, signature="s", access="read")
 
2060
    def Fingerprint_dbus_property(self):
 
2061
        return dbus.String(self.fingerprint)
 
2062
 
 
2063
    # Host - property
 
2064
    @dbus_service_property(_interface,
 
2065
                           signature="s",
 
2066
                           access="readwrite")
 
2067
    def Host_dbus_property(self, value=None):
 
2068
        if value is None:       # get
 
2069
            return dbus.String(self.host)
 
2070
        self.host = str(value)
 
2071
 
 
2072
    # Created - property
 
2073
    @dbus_annotations(
 
2074
        {"org.freedesktop.DBus.Property.EmitsChangedSignal": "const"})
 
2075
    @dbus_service_property(_interface, signature="s", access="read")
 
2076
    def Created_dbus_property(self):
 
2077
        return datetime_to_dbus(self.created)
 
2078
 
 
2079
    # LastEnabled - property
 
2080
    @dbus_service_property(_interface, signature="s", access="read")
 
2081
    def LastEnabled_dbus_property(self):
 
2082
        return datetime_to_dbus(self.last_enabled)
 
2083
 
 
2084
    # Enabled - property
 
2085
    @dbus_service_property(_interface,
 
2086
                           signature="b",
 
2087
                           access="readwrite")
 
2088
    def Enabled_dbus_property(self, value=None):
 
2089
        if value is None:       # get
 
2090
            return dbus.Boolean(self.enabled)
 
2091
        if value:
 
2092
            self.enable()
 
2093
        else:
 
2094
            self.disable()
 
2095
 
 
2096
    # LastCheckedOK - property
 
2097
    @dbus_service_property(_interface,
 
2098
                           signature="s",
 
2099
                           access="readwrite")
 
2100
    def LastCheckedOK_dbus_property(self, value=None):
 
2101
        if value is not None:
 
2102
            self.checked_ok()
 
2103
            return
 
2104
        return datetime_to_dbus(self.last_checked_ok)
 
2105
 
 
2106
    # LastCheckerStatus - property
 
2107
    @dbus_service_property(_interface, signature="n", access="read")
 
2108
    def LastCheckerStatus_dbus_property(self):
 
2109
        return dbus.Int16(self.last_checker_status)
 
2110
 
 
2111
    # Expires - property
 
2112
    @dbus_service_property(_interface, signature="s", access="read")
 
2113
    def Expires_dbus_property(self):
 
2114
        return datetime_to_dbus(self.expires)
 
2115
 
 
2116
    # LastApprovalRequest - property
 
2117
    @dbus_service_property(_interface, signature="s", access="read")
 
2118
    def LastApprovalRequest_dbus_property(self):
 
2119
        return datetime_to_dbus(self.last_approval_request)
 
2120
 
 
2121
    # Timeout - property
 
2122
    @dbus_service_property(_interface,
 
2123
                           signature="t",
 
2124
                           access="readwrite")
 
2125
    def Timeout_dbus_property(self, value=None):
 
2126
        if value is None:       # get
 
2127
            return dbus.UInt64(self.timeout.total_seconds() * 1000)
 
2128
        old_timeout = self.timeout
 
2129
        self.timeout = datetime.timedelta(0, 0, 0, value)
 
2130
        # Reschedule disabling
 
2131
        if self.enabled:
 
2132
            now = datetime.datetime.utcnow()
 
2133
            self.expires += self.timeout - old_timeout
 
2134
            if self.expires <= now:
 
2135
                # The timeout has passed
 
2136
                self.disable()
 
2137
            else:
 
2138
                if (getattr(self, "disable_initiator_tag", None)
 
2139
                    is None):
 
2140
                    return
 
2141
                GLib.source_remove(self.disable_initiator_tag)
 
2142
                self.disable_initiator_tag = GLib.timeout_add(
 
2143
                    int((self.expires - now).total_seconds() * 1000),
 
2144
                    self.disable)
 
2145
 
 
2146
    # ExtendedTimeout - property
 
2147
    @dbus_service_property(_interface,
 
2148
                           signature="t",
 
2149
                           access="readwrite")
 
2150
    def ExtendedTimeout_dbus_property(self, value=None):
 
2151
        if value is None:       # get
 
2152
            return dbus.UInt64(self.extended_timeout.total_seconds()
 
2153
                               * 1000)
 
2154
        self.extended_timeout = datetime.timedelta(0, 0, 0, value)
 
2155
 
 
2156
    # Interval - property
 
2157
    @dbus_service_property(_interface,
 
2158
                           signature="t",
 
2159
                           access="readwrite")
 
2160
    def Interval_dbus_property(self, value=None):
 
2161
        if value is None:       # get
 
2162
            return dbus.UInt64(self.interval.total_seconds() * 1000)
 
2163
        self.interval = datetime.timedelta(0, 0, 0, value)
 
2164
        if getattr(self, "checker_initiator_tag", None) is None:
 
2165
            return
 
2166
        if self.enabled:
 
2167
            # Reschedule checker run
 
2168
            GLib.source_remove(self.checker_initiator_tag)
 
2169
            self.checker_initiator_tag = GLib.timeout_add(
 
2170
                value, self.start_checker)
 
2171
            self.start_checker()  # Start one now, too
 
2172
 
 
2173
    # Checker - property
 
2174
    @dbus_service_property(_interface,
 
2175
                           signature="s",
 
2176
                           access="readwrite")
 
2177
    def Checker_dbus_property(self, value=None):
 
2178
        if value is None:       # get
 
2179
            return dbus.String(self.checker_command)
 
2180
        self.checker_command = str(value)
 
2181
 
 
2182
    # CheckerRunning - property
 
2183
    @dbus_service_property(_interface,
 
2184
                           signature="b",
 
2185
                           access="readwrite")
 
2186
    def CheckerRunning_dbus_property(self, value=None):
 
2187
        if value is None:       # get
 
2188
            return dbus.Boolean(self.checker is not None)
 
2189
        if value:
 
2190
            self.start_checker()
 
2191
        else:
 
2192
            self.stop_checker()
 
2193
 
 
2194
    # ObjectPath - property
 
2195
    @dbus_annotations(
 
2196
        {"org.freedesktop.DBus.Property.EmitsChangedSignal": "const",
 
2197
         "org.freedesktop.DBus.Deprecated": "true"})
 
2198
    @dbus_service_property(_interface, signature="o", access="read")
 
2199
    def ObjectPath_dbus_property(self):
 
2200
        return self.dbus_object_path  # is already a dbus.ObjectPath
 
2201
 
 
2202
    # Secret = property
 
2203
    @dbus_annotations(
 
2204
        {"org.freedesktop.DBus.Property.EmitsChangedSignal":
 
2205
         "invalidates"})
 
2206
    @dbus_service_property(_interface,
 
2207
                           signature="ay",
 
2208
                           access="write",
 
2209
                           byte_arrays=True)
 
2210
    def Secret_dbus_property(self, value):
 
2211
        self.secret = bytes(value)
 
2212
 
740
2213
    del _interface
741
2214
 
742
2215
 
 
2216
class ProxyClient(object):
 
2217
    def __init__(self, child_pipe, key_id, fpr, address):
 
2218
        self._pipe = child_pipe
 
2219
        self._pipe.send(('init', key_id, fpr, address))
 
2220
        if not self._pipe.recv():
 
2221
            raise KeyError(key_id or fpr)
 
2222
 
 
2223
    def __getattribute__(self, name):
 
2224
        if name == '_pipe':
 
2225
            return super(ProxyClient, self).__getattribute__(name)
 
2226
        self._pipe.send(('getattr', name))
 
2227
        data = self._pipe.recv()
 
2228
        if data[0] == 'data':
 
2229
            return data[1]
 
2230
        if data[0] == 'function':
 
2231
 
 
2232
            def func(*args, **kwargs):
 
2233
                self._pipe.send(('funcall', name, args, kwargs))
 
2234
                return self._pipe.recv()[1]
 
2235
 
 
2236
            return func
 
2237
 
 
2238
    def __setattr__(self, name, value):
 
2239
        if name == '_pipe':
 
2240
            return super(ProxyClient, self).__setattr__(name, value)
 
2241
        self._pipe.send(('setattr', name, value))
 
2242
 
 
2243
 
743
2244
class ClientHandler(socketserver.BaseRequestHandler, object):
744
2245
    """A class to handle client connections.
745
 
    
 
2246
 
746
2247
    Instantiated once for each connection to handle it.
747
2248
    Note: This will run in its own forked process."""
748
 
    
 
2249
 
749
2250
    def handle(self):
750
 
        logger.info(u"TCP connection from: %s",
751
 
                    unicode(self.client_address))
752
 
        logger.debug(u"IPC Pipe FD: %d", self.server.pipe[1])
753
 
        # Open IPC pipe to parent process
754
 
        with closing(os.fdopen(self.server.pipe[1], u"w", 1)) as ipc:
755
 
            session = (gnutls.connection
756
 
                       .ClientSession(self.request,
757
 
                                      gnutls.connection
758
 
                                      .X509Credentials()))
759
 
            
760
 
            line = self.request.makefile().readline()
761
 
            logger.debug(u"Protocol version: %r", line)
762
 
            try:
763
 
                if int(line.strip().split()[0]) > 1:
764
 
                    raise RuntimeError
765
 
            except (ValueError, IndexError, RuntimeError), error:
766
 
                logger.error(u"Unknown protocol version: %s", error)
767
 
                return
768
 
            
769
 
            # Note: gnutls.connection.X509Credentials is really a
770
 
            # generic GnuTLS certificate credentials object so long as
771
 
            # no X.509 keys are added to it.  Therefore, we can use it
772
 
            # here despite using OpenPGP certificates.
773
 
            
774
 
            #priority = u':'.join((u"NONE", u"+VERS-TLS1.1",
775
 
            #                      u"+AES-256-CBC", u"+SHA1",
776
 
            #                      u"+COMP-NULL", u"+CTYPE-OPENPGP",
777
 
            #                      u"+DHE-DSS"))
 
2251
        with contextlib.closing(self.server.child_pipe) as child_pipe:
 
2252
            logger.info("TCP connection from: %s",
 
2253
                        str(self.client_address))
 
2254
            logger.debug("Pipe FD: %d",
 
2255
                         self.server.child_pipe.fileno())
 
2256
 
 
2257
            session = gnutls.ClientSession(self.request)
 
2258
 
 
2259
            # priority = ':'.join(("NONE", "+VERS-TLS1.1",
 
2260
            #                       "+AES-256-CBC", "+SHA1",
 
2261
            #                       "+COMP-NULL", "+CTYPE-OPENPGP",
 
2262
            #                       "+DHE-DSS"))
778
2263
            # Use a fallback default, since this MUST be set.
779
2264
            priority = self.server.gnutls_priority
780
2265
            if priority is None:
781
 
                priority = u"NORMAL"
782
 
            (gnutls.library.functions
783
 
             .gnutls_priority_set_direct(session._c_object,
784
 
                                         priority, None))
785
 
            
 
2266
                priority = "NORMAL"
 
2267
            gnutls.priority_set_direct(session._c_object,
 
2268
                                       priority.encode("utf-8"),
 
2269
                                       None)
 
2270
 
 
2271
            # Start communication using the Mandos protocol
 
2272
            # Get protocol number
 
2273
            line = self.request.makefile().readline()
 
2274
            logger.debug("Protocol version: %r", line)
 
2275
            try:
 
2276
                if int(line.strip().split()[0]) > 1:
 
2277
                    raise RuntimeError(line)
 
2278
            except (ValueError, IndexError, RuntimeError) as error:
 
2279
                logger.error("Unknown protocol version: %s", error)
 
2280
                return
 
2281
 
 
2282
            # Start GnuTLS connection
786
2283
            try:
787
2284
                session.handshake()
788
 
            except gnutls.errors.GNUTLSError, error:
789
 
                logger.warning(u"Handshake failed: %s", error)
 
2285
            except gnutls.Error as error:
 
2286
                logger.warning("Handshake failed: %s", error)
790
2287
                # Do not run session.bye() here: the session is not
791
2288
                # established.  Just abandon the request.
792
2289
                return
793
 
            logger.debug(u"Handshake succeeded")
 
2290
            logger.debug("Handshake succeeded")
 
2291
 
 
2292
            approval_required = False
794
2293
            try:
795
 
                fpr = self.fingerprint(self.peer_certificate(session))
796
 
            except (TypeError, gnutls.errors.GNUTLSError), error:
797
 
                logger.warning(u"Bad certificate: %s", error)
798
 
                session.bye()
799
 
                return
800
 
            logger.debug(u"Fingerprint: %s", fpr)
801
 
            
802
 
            for c in self.server.clients:
803
 
                if c.fingerprint == fpr:
804
 
                    client = c
805
 
                    break
806
 
            else:
807
 
                ipc.write(u"NOTFOUND %s\n" % fpr)
808
 
                session.bye()
809
 
                return
810
 
            # Have to check if client.still_valid(), since it is
811
 
            # possible that the client timed out while establishing
812
 
            # the GnuTLS session.
813
 
            if not client.still_valid():
814
 
                ipc.write(u"INVALID %s\n" % client.name)
815
 
                session.bye()
816
 
                return
817
 
            ipc.write(u"SENDING %s\n" % client.name)
818
 
            sent_size = 0
819
 
            while sent_size < len(client.secret):
820
 
                sent = session.send(client.secret[sent_size:])
821
 
                logger.debug(u"Sent: %d, remaining: %d",
822
 
                             sent, len(client.secret)
823
 
                             - (sent_size + sent))
824
 
                sent_size += sent
825
 
            session.bye()
826
 
    
 
2294
                if gnutls.has_rawpk:
 
2295
                    fpr = b""
 
2296
                    try:
 
2297
                        key_id = self.key_id(
 
2298
                            self.peer_certificate(session))
 
2299
                    except (TypeError, gnutls.Error) as error:
 
2300
                        logger.warning("Bad certificate: %s", error)
 
2301
                        return
 
2302
                    logger.debug("Key ID: %s", key_id)
 
2303
 
 
2304
                else:
 
2305
                    key_id = b""
 
2306
                    try:
 
2307
                        fpr = self.fingerprint(
 
2308
                            self.peer_certificate(session))
 
2309
                    except (TypeError, gnutls.Error) as error:
 
2310
                        logger.warning("Bad certificate: %s", error)
 
2311
                        return
 
2312
                    logger.debug("Fingerprint: %s", fpr)
 
2313
 
 
2314
                try:
 
2315
                    client = ProxyClient(child_pipe, key_id, fpr,
 
2316
                                         self.client_address)
 
2317
                except KeyError:
 
2318
                    return
 
2319
 
 
2320
                if client.approval_delay:
 
2321
                    delay = client.approval_delay
 
2322
                    client.approvals_pending += 1
 
2323
                    approval_required = True
 
2324
 
 
2325
                while True:
 
2326
                    if not client.enabled:
 
2327
                        logger.info("Client %s is disabled",
 
2328
                                    client.name)
 
2329
                        if self.server.use_dbus:
 
2330
                            # Emit D-Bus signal
 
2331
                            client.Rejected("Disabled")
 
2332
                        return
 
2333
 
 
2334
                    if client.approved or not client.approval_delay:
 
2335
                        # We are approved or approval is disabled
 
2336
                        break
 
2337
                    elif client.approved is None:
 
2338
                        logger.info("Client %s needs approval",
 
2339
                                    client.name)
 
2340
                        if self.server.use_dbus:
 
2341
                            # Emit D-Bus signal
 
2342
                            client.NeedApproval(
 
2343
                                client.approval_delay.total_seconds()
 
2344
                                * 1000, client.approved_by_default)
 
2345
                    else:
 
2346
                        logger.warning("Client %s was not approved",
 
2347
                                       client.name)
 
2348
                        if self.server.use_dbus:
 
2349
                            # Emit D-Bus signal
 
2350
                            client.Rejected("Denied")
 
2351
                        return
 
2352
 
 
2353
                    # wait until timeout or approved
 
2354
                    time = datetime.datetime.now()
 
2355
                    client.changedstate.acquire()
 
2356
                    client.changedstate.wait(delay.total_seconds())
 
2357
                    client.changedstate.release()
 
2358
                    time2 = datetime.datetime.now()
 
2359
                    if (time2 - time) >= delay:
 
2360
                        if not client.approved_by_default:
 
2361
                            logger.warning("Client %s timed out while"
 
2362
                                           " waiting for approval",
 
2363
                                           client.name)
 
2364
                            if self.server.use_dbus:
 
2365
                                # Emit D-Bus signal
 
2366
                                client.Rejected("Approval timed out")
 
2367
                            return
 
2368
                        else:
 
2369
                            break
 
2370
                    else:
 
2371
                        delay -= time2 - time
 
2372
 
 
2373
                try:
 
2374
                    session.send(client.secret)
 
2375
                except gnutls.Error as error:
 
2376
                    logger.warning("gnutls send failed",
 
2377
                                   exc_info=error)
 
2378
                    return
 
2379
 
 
2380
                logger.info("Sending secret to %s", client.name)
 
2381
                # bump the timeout using extended_timeout
 
2382
                client.bump_timeout(client.extended_timeout)
 
2383
                if self.server.use_dbus:
 
2384
                    # Emit D-Bus signal
 
2385
                    client.GotSecret()
 
2386
 
 
2387
            finally:
 
2388
                if approval_required:
 
2389
                    client.approvals_pending -= 1
 
2390
                try:
 
2391
                    session.bye()
 
2392
                except gnutls.Error as error:
 
2393
                    logger.warning("GnuTLS bye failed",
 
2394
                                   exc_info=error)
 
2395
 
827
2396
    @staticmethod
828
2397
    def peer_certificate(session):
829
 
        "Return the peer's OpenPGP certificate as a bytestring"
830
 
        # If not an OpenPGP certificate...
831
 
        if (gnutls.library.functions
832
 
            .gnutls_certificate_type_get(session._c_object)
833
 
            != gnutls.library.constants.GNUTLS_CRT_OPENPGP):
834
 
            # ...do the normal thing
835
 
            return session.peer_certificate
 
2398
        "Return the peer's certificate as a bytestring"
 
2399
        try:
 
2400
            cert_type = gnutls.certificate_type_get2(session._c_object,
 
2401
                                                     gnutls.CTYPE_PEERS)
 
2402
        except AttributeError:
 
2403
            cert_type = gnutls.certificate_type_get(session._c_object)
 
2404
        if gnutls.has_rawpk:
 
2405
            valid_cert_types = frozenset((gnutls.CRT_RAWPK,))
 
2406
        else:
 
2407
            valid_cert_types = frozenset((gnutls.CRT_OPENPGP,))
 
2408
        # If not a valid certificate type...
 
2409
        if cert_type not in valid_cert_types:
 
2410
            logger.info("Cert type %r not in %r", cert_type,
 
2411
                        valid_cert_types)
 
2412
            # ...return invalid data
 
2413
            return b""
836
2414
        list_size = ctypes.c_uint(1)
837
 
        cert_list = (gnutls.library.functions
838
 
                     .gnutls_certificate_get_peers
 
2415
        cert_list = (gnutls.certificate_get_peers
839
2416
                     (session._c_object, ctypes.byref(list_size)))
840
2417
        if not bool(cert_list) and list_size.value != 0:
841
 
            raise gnutls.errors.GNUTLSError(u"error getting peer"
842
 
                                            u" certificate")
 
2418
            raise gnutls.Error("error getting peer certificate")
843
2419
        if list_size.value == 0:
844
2420
            return None
845
2421
        cert = cert_list[0]
846
2422
        return ctypes.string_at(cert.data, cert.size)
847
 
    
 
2423
 
 
2424
    @staticmethod
 
2425
    def key_id(certificate):
 
2426
        "Convert a certificate bytestring to a hexdigit key ID"
 
2427
        # New GnuTLS "datum" with the public key
 
2428
        datum = gnutls.datum_t(
 
2429
            ctypes.cast(ctypes.c_char_p(certificate),
 
2430
                        ctypes.POINTER(ctypes.c_ubyte)),
 
2431
            ctypes.c_uint(len(certificate)))
 
2432
        # XXX all these need to be created in the gnutls "module"
 
2433
        # New empty GnuTLS certificate
 
2434
        pubkey = gnutls.pubkey_t()
 
2435
        gnutls.pubkey_init(ctypes.byref(pubkey))
 
2436
        # Import the raw public key into the certificate
 
2437
        gnutls.pubkey_import(pubkey,
 
2438
                             ctypes.byref(datum),
 
2439
                             gnutls.X509_FMT_DER)
 
2440
        # New buffer for the key ID
 
2441
        buf = ctypes.create_string_buffer(32)
 
2442
        buf_len = ctypes.c_size_t(len(buf))
 
2443
        # Get the key ID from the raw public key into the buffer
 
2444
        gnutls.pubkey_get_key_id(pubkey,
 
2445
                                 gnutls.KEYID_USE_SHA256,
 
2446
                                 ctypes.cast(ctypes.byref(buf),
 
2447
                                             ctypes.POINTER(ctypes.c_ubyte)),
 
2448
                                 ctypes.byref(buf_len))
 
2449
        # Deinit the certificate
 
2450
        gnutls.pubkey_deinit(pubkey)
 
2451
 
 
2452
        # Convert the buffer to a Python bytestring
 
2453
        key_id = ctypes.string_at(buf, buf_len.value)
 
2454
        # Convert the bytestring to hexadecimal notation
 
2455
        hex_key_id = binascii.hexlify(key_id).upper()
 
2456
        return hex_key_id
 
2457
 
848
2458
    @staticmethod
849
2459
    def fingerprint(openpgp):
850
2460
        "Convert an OpenPGP bytestring to a hexdigit fingerprint"
851
2461
        # New GnuTLS "datum" with the OpenPGP public key
852
 
        datum = (gnutls.library.types
853
 
                 .gnutls_datum_t(ctypes.cast(ctypes.c_char_p(openpgp),
854
 
                                             ctypes.POINTER
855
 
                                             (ctypes.c_ubyte)),
856
 
                                 ctypes.c_uint(len(openpgp))))
 
2462
        datum = gnutls.datum_t(
 
2463
            ctypes.cast(ctypes.c_char_p(openpgp),
 
2464
                        ctypes.POINTER(ctypes.c_ubyte)),
 
2465
            ctypes.c_uint(len(openpgp)))
857
2466
        # New empty GnuTLS certificate
858
 
        crt = gnutls.library.types.gnutls_openpgp_crt_t()
859
 
        (gnutls.library.functions
860
 
         .gnutls_openpgp_crt_init(ctypes.byref(crt)))
 
2467
        crt = gnutls.openpgp_crt_t()
 
2468
        gnutls.openpgp_crt_init(ctypes.byref(crt))
861
2469
        # Import the OpenPGP public key into the certificate
862
 
        (gnutls.library.functions
863
 
         .gnutls_openpgp_crt_import(crt, ctypes.byref(datum),
864
 
                                    gnutls.library.constants
865
 
                                    .GNUTLS_OPENPGP_FMT_RAW))
 
2470
        gnutls.openpgp_crt_import(crt, ctypes.byref(datum),
 
2471
                                  gnutls.OPENPGP_FMT_RAW)
866
2472
        # Verify the self signature in the key
867
2473
        crtverify = ctypes.c_uint()
868
 
        (gnutls.library.functions
869
 
         .gnutls_openpgp_crt_verify_self(crt, 0,
870
 
                                         ctypes.byref(crtverify)))
 
2474
        gnutls.openpgp_crt_verify_self(crt, 0,
 
2475
                                       ctypes.byref(crtverify))
871
2476
        if crtverify.value != 0:
872
 
            gnutls.library.functions.gnutls_openpgp_crt_deinit(crt)
873
 
            raise (gnutls.errors.CertificateSecurityError
874
 
                   (u"Verify failed"))
 
2477
            gnutls.openpgp_crt_deinit(crt)
 
2478
            raise gnutls.CertificateSecurityError(code
 
2479
                                                  =crtverify.value)
875
2480
        # New buffer for the fingerprint
876
2481
        buf = ctypes.create_string_buffer(20)
877
2482
        buf_len = ctypes.c_size_t()
878
2483
        # Get the fingerprint from the certificate into the buffer
879
 
        (gnutls.library.functions
880
 
         .gnutls_openpgp_crt_get_fingerprint(crt, ctypes.byref(buf),
881
 
                                             ctypes.byref(buf_len)))
 
2484
        gnutls.openpgp_crt_get_fingerprint(crt, ctypes.byref(buf),
 
2485
                                           ctypes.byref(buf_len))
882
2486
        # Deinit the certificate
883
 
        gnutls.library.functions.gnutls_openpgp_crt_deinit(crt)
 
2487
        gnutls.openpgp_crt_deinit(crt)
884
2488
        # Convert the buffer to a Python bytestring
885
2489
        fpr = ctypes.string_at(buf, buf_len.value)
886
2490
        # Convert the bytestring to hexadecimal notation
887
 
        hex_fpr = u''.join(u"%02X" % ord(char) for char in fpr)
 
2491
        hex_fpr = binascii.hexlify(fpr).upper()
888
2492
        return hex_fpr
889
2493
 
890
2494
 
891
 
class ForkingMixInWithPipe(socketserver.ForkingMixIn, object):
892
 
    """Like socketserver.ForkingMixIn, but also pass a pipe.
893
 
    
894
 
    Assumes a gobject.MainLoop event loop.
895
 
    """
 
2495
class MultiprocessingMixIn(object):
 
2496
    """Like socketserver.ThreadingMixIn, but with multiprocessing"""
 
2497
 
 
2498
    def sub_process_main(self, request, address):
 
2499
        try:
 
2500
            self.finish_request(request, address)
 
2501
        except Exception:
 
2502
            self.handle_error(request, address)
 
2503
        self.close_request(request)
 
2504
 
 
2505
    def process_request(self, request, address):
 
2506
        """Start a new process to process the request."""
 
2507
        proc = multiprocessing.Process(target=self.sub_process_main,
 
2508
                                       args=(request, address))
 
2509
        proc.start()
 
2510
        return proc
 
2511
 
 
2512
 
 
2513
class MultiprocessingMixInWithPipe(MultiprocessingMixIn, object):
 
2514
    """ adds a pipe to the MixIn """
 
2515
 
896
2516
    def process_request(self, request, client_address):
897
2517
        """Overrides and wraps the original process_request().
898
 
        
899
 
        This function creates a new pipe in self.pipe 
 
2518
 
 
2519
        This function creates a new pipe in self.pipe
900
2520
        """
901
 
        self.pipe = os.pipe()
902
 
        super(ForkingMixInWithPipe,
903
 
              self).process_request(request, client_address)
904
 
        os.close(self.pipe[1])  # close write end
905
 
        # Call "handle_ipc" for both data and EOF events
906
 
        gobject.io_add_watch(self.pipe[0],
907
 
                             gobject.IO_IN | gobject.IO_HUP,
908
 
                             self.handle_ipc)
909
 
    def handle_ipc(source, condition):
 
2521
        parent_pipe, self.child_pipe = multiprocessing.Pipe()
 
2522
 
 
2523
        proc = MultiprocessingMixIn.process_request(self, request,
 
2524
                                                    client_address)
 
2525
        self.child_pipe.close()
 
2526
        self.add_pipe(parent_pipe, proc)
 
2527
 
 
2528
    def add_pipe(self, parent_pipe, proc):
910
2529
        """Dummy function; override as necessary"""
911
 
        os.close(source)
912
 
        return False
913
 
 
914
 
 
915
 
class IPv6_TCPServer(ForkingMixInWithPipe,
 
2530
        raise NotImplementedError()
 
2531
 
 
2532
 
 
2533
class IPv6_TCPServer(MultiprocessingMixInWithPipe,
916
2534
                     socketserver.TCPServer, object):
917
2535
    """IPv6-capable TCP server.  Accepts 'None' as address and/or port
918
 
    
 
2536
 
919
2537
    Attributes:
920
2538
        enabled:        Boolean; whether this server is activated yet
921
2539
        interface:      None or a network interface name (string)
922
2540
        use_ipv6:       Boolean; to use IPv6 or not
923
 
        ----
924
 
        clients:        set of Client objects
925
 
        gnutls_priority GnuTLS priority string
926
 
        use_dbus:       Boolean; to emit D-Bus signals or not
927
2541
    """
 
2542
 
928
2543
    def __init__(self, server_address, RequestHandlerClass,
929
 
                 interface=None, use_ipv6=True, clients=None,
930
 
                 gnutls_priority=None, use_dbus=True):
931
 
        self.enabled = False
 
2544
                 interface=None,
 
2545
                 use_ipv6=True,
 
2546
                 socketfd=None):
 
2547
        """If socketfd is set, use that file descriptor instead of
 
2548
        creating a new one with socket.socket().
 
2549
        """
932
2550
        self.interface = interface
933
2551
        if use_ipv6:
934
2552
            self.address_family = socket.AF_INET6
935
 
        self.clients = clients
936
 
        self.use_dbus = use_dbus
937
 
        self.gnutls_priority = gnutls_priority
 
2553
        if socketfd is not None:
 
2554
            # Save the file descriptor
 
2555
            self.socketfd = socketfd
 
2556
            # Save the original socket.socket() function
 
2557
            self.socket_socket = socket.socket
 
2558
 
 
2559
            # To implement --socket, we monkey patch socket.socket.
 
2560
            #
 
2561
            # (When socketserver.TCPServer is a new-style class, we
 
2562
            # could make self.socket into a property instead of monkey
 
2563
            # patching socket.socket.)
 
2564
            #
 
2565
            # Create a one-time-only replacement for socket.socket()
 
2566
            @functools.wraps(socket.socket)
 
2567
            def socket_wrapper(*args, **kwargs):
 
2568
                # Restore original function so subsequent calls are
 
2569
                # not affected.
 
2570
                socket.socket = self.socket_socket
 
2571
                del self.socket_socket
 
2572
                # This time only, return a new socket object from the
 
2573
                # saved file descriptor.
 
2574
                return socket.fromfd(self.socketfd, *args, **kwargs)
 
2575
            # Replace socket.socket() function with wrapper
 
2576
            socket.socket = socket_wrapper
 
2577
        # The socketserver.TCPServer.__init__ will call
 
2578
        # socket.socket(), which might be our replacement,
 
2579
        # socket_wrapper(), if socketfd was set.
938
2580
        socketserver.TCPServer.__init__(self, server_address,
939
2581
                                        RequestHandlerClass)
 
2582
 
940
2583
    def server_bind(self):
941
2584
        """This overrides the normal server_bind() function
942
2585
        to bind to an interface if one was specified, and also NOT to
943
2586
        bind to an address or port if they were not specified."""
 
2587
        global SO_BINDTODEVICE
944
2588
        if self.interface is not None:
 
2589
            if SO_BINDTODEVICE is None:
 
2590
                # Fall back to a hard-coded value which seems to be
 
2591
                # common enough.
 
2592
                logger.warning("SO_BINDTODEVICE not found, trying 25")
 
2593
                SO_BINDTODEVICE = 25
945
2594
            try:
946
 
                self.socket.setsockopt(socket.SOL_SOCKET,
947
 
                                       SO_BINDTODEVICE,
948
 
                                       str(self.interface + u'\0'))
949
 
            except socket.error, error:
950
 
                if error[0] == errno.EPERM:
951
 
                    logger.error(u"No permission to"
952
 
                                 u" bind to interface %s",
 
2595
                self.socket.setsockopt(
 
2596
                    socket.SOL_SOCKET, SO_BINDTODEVICE,
 
2597
                    (self.interface + "\0").encode("utf-8"))
 
2598
            except socket.error as error:
 
2599
                if error.errno == errno.EPERM:
 
2600
                    logger.error("No permission to bind to"
 
2601
                                 " interface %s", self.interface)
 
2602
                elif error.errno == errno.ENOPROTOOPT:
 
2603
                    logger.error("SO_BINDTODEVICE not available;"
 
2604
                                 " cannot bind to interface %s",
953
2605
                                 self.interface)
 
2606
                elif error.errno == errno.ENODEV:
 
2607
                    logger.error("Interface %s does not exist,"
 
2608
                                 " cannot bind", self.interface)
954
2609
                else:
955
2610
                    raise
956
2611
        # Only bind(2) the socket if we really need to.
957
2612
        if self.server_address[0] or self.server_address[1]:
 
2613
            if self.server_address[1]:
 
2614
                self.allow_reuse_address = True
958
2615
            if not self.server_address[0]:
959
2616
                if self.address_family == socket.AF_INET6:
960
 
                    any_address = u"::" # in6addr_any
 
2617
                    any_address = "::"  # in6addr_any
961
2618
                else:
962
 
                    any_address = socket.INADDR_ANY
 
2619
                    any_address = "0.0.0.0"  # INADDR_ANY
963
2620
                self.server_address = (any_address,
964
2621
                                       self.server_address[1])
965
2622
            elif not self.server_address[1]:
966
 
                self.server_address = (self.server_address[0],
967
 
                                       0)
 
2623
                self.server_address = (self.server_address[0], 0)
968
2624
#                 if self.interface:
969
2625
#                     self.server_address = (self.server_address[0],
970
2626
#                                            0, # port
972
2628
#                                            if_nametoindex
973
2629
#                                            (self.interface))
974
2630
            return socketserver.TCPServer.server_bind(self)
 
2631
 
 
2632
 
 
2633
class MandosServer(IPv6_TCPServer):
 
2634
    """Mandos server.
 
2635
 
 
2636
    Attributes:
 
2637
        clients:        set of Client objects
 
2638
        gnutls_priority GnuTLS priority string
 
2639
        use_dbus:       Boolean; to emit D-Bus signals or not
 
2640
 
 
2641
    Assumes a GLib.MainLoop event loop.
 
2642
    """
 
2643
 
 
2644
    def __init__(self, server_address, RequestHandlerClass,
 
2645
                 interface=None,
 
2646
                 use_ipv6=True,
 
2647
                 clients=None,
 
2648
                 gnutls_priority=None,
 
2649
                 use_dbus=True,
 
2650
                 socketfd=None):
 
2651
        self.enabled = False
 
2652
        self.clients = clients
 
2653
        if self.clients is None:
 
2654
            self.clients = {}
 
2655
        self.use_dbus = use_dbus
 
2656
        self.gnutls_priority = gnutls_priority
 
2657
        IPv6_TCPServer.__init__(self, server_address,
 
2658
                                RequestHandlerClass,
 
2659
                                interface=interface,
 
2660
                                use_ipv6=use_ipv6,
 
2661
                                socketfd=socketfd)
 
2662
 
975
2663
    def server_activate(self):
976
2664
        if self.enabled:
977
2665
            return socketserver.TCPServer.server_activate(self)
 
2666
 
978
2667
    def enable(self):
979
2668
        self.enabled = True
980
 
    def handle_ipc(self, source, condition, file_objects={}):
981
 
        condition_names = {
982
 
            gobject.IO_IN: u"IN",   # There is data to read.
983
 
            gobject.IO_OUT: u"OUT", # Data can be written (without
984
 
                                    # blocking).
985
 
            gobject.IO_PRI: u"PRI", # There is urgent data to read.
986
 
            gobject.IO_ERR: u"ERR", # Error condition.
987
 
            gobject.IO_HUP: u"HUP"  # Hung up (the connection has been
988
 
                                    # broken, usually for pipes and
989
 
                                    # sockets).
990
 
            }
991
 
        conditions_string = ' | '.join(name
992
 
                                       for cond, name in
993
 
                                       condition_names.iteritems()
994
 
                                       if cond & condition)
995
 
        logger.debug(u"Handling IPC: FD = %d, condition = %s", source,
996
 
                     conditions_string)
997
 
        
998
 
        # Turn the pipe file descriptor into a Python file object
999
 
        if source not in file_objects:
1000
 
            file_objects[source] = os.fdopen(source, u"r", 1)
1001
 
        
1002
 
        # Read a line from the file object
1003
 
        cmdline = file_objects[source].readline()
1004
 
        if not cmdline:             # Empty line means end of file
1005
 
            # close the IPC pipe
1006
 
            file_objects[source].close()
1007
 
            del file_objects[source]
1008
 
            
1009
 
            # Stop calling this function
1010
 
            return False
1011
 
        
1012
 
        logger.debug(u"IPC command: %r", cmdline)
1013
 
        
1014
 
        # Parse and act on command
1015
 
        cmd, args = cmdline.rstrip(u"\r\n").split(None, 1)
1016
 
        
1017
 
        if cmd == u"NOTFOUND":
1018
 
            logger.warning(u"Client not found for fingerprint: %s",
1019
 
                           args)
1020
 
            if self.use_dbus:
1021
 
                # Emit D-Bus signal
1022
 
                mandos_dbus_service.ClientNotFound(args)
1023
 
        elif cmd == u"INVALID":
1024
 
            for client in self.clients:
1025
 
                if client.name == args:
1026
 
                    logger.warning(u"Client %s is invalid", args)
1027
 
                    if self.use_dbus:
1028
 
                        # Emit D-Bus signal
1029
 
                        client.Rejected()
1030
 
                    break
1031
 
            else:
1032
 
                logger.error(u"Unknown client %s is invalid", args)
1033
 
        elif cmd == u"SENDING":
1034
 
            for client in self.clients:
1035
 
                if client.name == args:
1036
 
                    logger.info(u"Sending secret to %s", client.name)
1037
 
                    client.checked_ok()
1038
 
                    if self.use_dbus:
1039
 
                        # Emit D-Bus signal
1040
 
                        client.ReceivedSecret()
1041
 
                    break
1042
 
            else:
1043
 
                logger.error(u"Sending secret to unknown client %s",
1044
 
                             args)
 
2669
 
 
2670
    def add_pipe(self, parent_pipe, proc):
 
2671
        # Call "handle_ipc" for both data and EOF events
 
2672
        GLib.io_add_watch(
 
2673
            parent_pipe.fileno(),
 
2674
            GLib.IO_IN | GLib.IO_HUP,
 
2675
            functools.partial(self.handle_ipc,
 
2676
                              parent_pipe=parent_pipe,
 
2677
                              proc=proc))
 
2678
 
 
2679
    def handle_ipc(self, source, condition,
 
2680
                   parent_pipe=None,
 
2681
                   proc=None,
 
2682
                   client_object=None):
 
2683
        # error, or the other end of multiprocessing.Pipe has closed
 
2684
        if condition & (GLib.IO_ERR | GLib.IO_HUP):
 
2685
            # Wait for other process to exit
 
2686
            proc.join()
 
2687
            return False
 
2688
 
 
2689
        # Read a request from the child
 
2690
        request = parent_pipe.recv()
 
2691
        command = request[0]
 
2692
 
 
2693
        if command == 'init':
 
2694
            key_id = request[1].decode("ascii")
 
2695
            fpr = request[2].decode("ascii")
 
2696
            address = request[3]
 
2697
 
 
2698
            for c in self.clients.values():
 
2699
                if key_id == "E3B0C44298FC1C149AFBF4C8996FB92427AE41E4649B934CA495991B7852B855":
 
2700
                    continue
 
2701
                if key_id and c.key_id == key_id:
 
2702
                    client = c
 
2703
                    break
 
2704
                if fpr and c.fingerprint == fpr:
 
2705
                    client = c
 
2706
                    break
 
2707
            else:
 
2708
                logger.info("Client not found for key ID: %s, address"
 
2709
                            ": %s", key_id or fpr, address)
 
2710
                if self.use_dbus:
 
2711
                    # Emit D-Bus signal
 
2712
                    mandos_dbus_service.ClientNotFound(key_id or fpr,
 
2713
                                                       address[0])
 
2714
                parent_pipe.send(False)
 
2715
                return False
 
2716
 
 
2717
            GLib.io_add_watch(
 
2718
                parent_pipe.fileno(),
 
2719
                GLib.IO_IN | GLib.IO_HUP,
 
2720
                functools.partial(self.handle_ipc,
 
2721
                                  parent_pipe=parent_pipe,
 
2722
                                  proc=proc,
 
2723
                                  client_object=client))
 
2724
            parent_pipe.send(True)
 
2725
            # remove the old hook in favor of the new above hook on
 
2726
            # same fileno
 
2727
            return False
 
2728
        if command == 'funcall':
 
2729
            funcname = request[1]
 
2730
            args = request[2]
 
2731
            kwargs = request[3]
 
2732
 
 
2733
            parent_pipe.send(('data', getattr(client_object,
 
2734
                                              funcname)(*args,
 
2735
                                                        **kwargs)))
 
2736
 
 
2737
        if command == 'getattr':
 
2738
            attrname = request[1]
 
2739
            if isinstance(client_object.__getattribute__(attrname),
 
2740
                          collections.Callable):
 
2741
                parent_pipe.send(('function', ))
 
2742
            else:
 
2743
                parent_pipe.send((
 
2744
                    'data', client_object.__getattribute__(attrname)))
 
2745
 
 
2746
        if command == 'setattr':
 
2747
            attrname = request[1]
 
2748
            value = request[2]
 
2749
            setattr(client_object, attrname, value)
 
2750
 
 
2751
        return True
 
2752
 
 
2753
 
 
2754
def rfc3339_duration_to_delta(duration):
 
2755
    """Parse an RFC 3339 "duration" and return a datetime.timedelta
 
2756
 
 
2757
    >>> rfc3339_duration_to_delta("P7D")
 
2758
    datetime.timedelta(7)
 
2759
    >>> rfc3339_duration_to_delta("PT60S")
 
2760
    datetime.timedelta(0, 60)
 
2761
    >>> rfc3339_duration_to_delta("PT60M")
 
2762
    datetime.timedelta(0, 3600)
 
2763
    >>> rfc3339_duration_to_delta("PT24H")
 
2764
    datetime.timedelta(1)
 
2765
    >>> rfc3339_duration_to_delta("P1W")
 
2766
    datetime.timedelta(7)
 
2767
    >>> rfc3339_duration_to_delta("PT5M30S")
 
2768
    datetime.timedelta(0, 330)
 
2769
    >>> rfc3339_duration_to_delta("P1DT3M20S")
 
2770
    datetime.timedelta(1, 200)
 
2771
    """
 
2772
 
 
2773
    # Parsing an RFC 3339 duration with regular expressions is not
 
2774
    # possible - there would have to be multiple places for the same
 
2775
    # values, like seconds.  The current code, while more esoteric, is
 
2776
    # cleaner without depending on a parsing library.  If Python had a
 
2777
    # built-in library for parsing we would use it, but we'd like to
 
2778
    # avoid excessive use of external libraries.
 
2779
 
 
2780
    # New type for defining tokens, syntax, and semantics all-in-one
 
2781
    Token = collections.namedtuple("Token", (
 
2782
        "regexp",  # To match token; if "value" is not None, must have
 
2783
                   # a "group" containing digits
 
2784
        "value",   # datetime.timedelta or None
 
2785
        "followers"))           # Tokens valid after this token
 
2786
    # RFC 3339 "duration" tokens, syntax, and semantics; taken from
 
2787
    # the "duration" ABNF definition in RFC 3339, Appendix A.
 
2788
    token_end = Token(re.compile(r"$"), None, frozenset())
 
2789
    token_second = Token(re.compile(r"(\d+)S"),
 
2790
                         datetime.timedelta(seconds=1),
 
2791
                         frozenset((token_end, )))
 
2792
    token_minute = Token(re.compile(r"(\d+)M"),
 
2793
                         datetime.timedelta(minutes=1),
 
2794
                         frozenset((token_second, token_end)))
 
2795
    token_hour = Token(re.compile(r"(\d+)H"),
 
2796
                       datetime.timedelta(hours=1),
 
2797
                       frozenset((token_minute, token_end)))
 
2798
    token_time = Token(re.compile(r"T"),
 
2799
                       None,
 
2800
                       frozenset((token_hour, token_minute,
 
2801
                                  token_second)))
 
2802
    token_day = Token(re.compile(r"(\d+)D"),
 
2803
                      datetime.timedelta(days=1),
 
2804
                      frozenset((token_time, token_end)))
 
2805
    token_month = Token(re.compile(r"(\d+)M"),
 
2806
                        datetime.timedelta(weeks=4),
 
2807
                        frozenset((token_day, token_end)))
 
2808
    token_year = Token(re.compile(r"(\d+)Y"),
 
2809
                       datetime.timedelta(weeks=52),
 
2810
                       frozenset((token_month, token_end)))
 
2811
    token_week = Token(re.compile(r"(\d+)W"),
 
2812
                       datetime.timedelta(weeks=1),
 
2813
                       frozenset((token_end, )))
 
2814
    token_duration = Token(re.compile(r"P"), None,
 
2815
                           frozenset((token_year, token_month,
 
2816
                                      token_day, token_time,
 
2817
                                      token_week)))
 
2818
    # Define starting values:
 
2819
    # Value so far
 
2820
    value = datetime.timedelta()
 
2821
    found_token = None
 
2822
    # Following valid tokens
 
2823
    followers = frozenset((token_duration, ))
 
2824
    # String left to parse
 
2825
    s = duration
 
2826
    # Loop until end token is found
 
2827
    while found_token is not token_end:
 
2828
        # Search for any currently valid tokens
 
2829
        for token in followers:
 
2830
            match = token.regexp.match(s)
 
2831
            if match is not None:
 
2832
                # Token found
 
2833
                if token.value is not None:
 
2834
                    # Value found, parse digits
 
2835
                    factor = int(match.group(1), 10)
 
2836
                    # Add to value so far
 
2837
                    value += factor * token.value
 
2838
                # Strip token from string
 
2839
                s = token.regexp.sub("", s, 1)
 
2840
                # Go to found token
 
2841
                found_token = token
 
2842
                # Set valid next tokens
 
2843
                followers = found_token.followers
 
2844
                break
1045
2845
        else:
1046
 
            logger.error(u"Unknown IPC command: %r", cmdline)
1047
 
        
1048
 
        # Keep calling this function
1049
 
        return True
 
2846
            # No currently valid tokens were found
 
2847
            raise ValueError("Invalid RFC 3339 duration: {!r}"
 
2848
                             .format(duration))
 
2849
    # End token found
 
2850
    return value
1050
2851
 
1051
2852
 
1052
2853
def string_to_delta(interval):
1053
2854
    """Parse a string and return a datetime.timedelta
1054
 
    
1055
 
    >>> string_to_delta(u'7d')
 
2855
 
 
2856
    >>> string_to_delta('7d')
1056
2857
    datetime.timedelta(7)
1057
 
    >>> string_to_delta(u'60s')
 
2858
    >>> string_to_delta('60s')
1058
2859
    datetime.timedelta(0, 60)
1059
 
    >>> string_to_delta(u'60m')
 
2860
    >>> string_to_delta('60m')
1060
2861
    datetime.timedelta(0, 3600)
1061
 
    >>> string_to_delta(u'24h')
 
2862
    >>> string_to_delta('24h')
1062
2863
    datetime.timedelta(1)
1063
 
    >>> string_to_delta(u'1w')
 
2864
    >>> string_to_delta('1w')
1064
2865
    datetime.timedelta(7)
1065
 
    >>> string_to_delta(u'5m 30s')
 
2866
    >>> string_to_delta('5m 30s')
1066
2867
    datetime.timedelta(0, 330)
1067
2868
    """
 
2869
 
 
2870
    try:
 
2871
        return rfc3339_duration_to_delta(interval)
 
2872
    except ValueError:
 
2873
        pass
 
2874
 
1068
2875
    timevalue = datetime.timedelta(0)
1069
2876
    for s in interval.split():
1070
2877
        try:
1071
 
            suffix = unicode(s[-1])
 
2878
            suffix = s[-1]
1072
2879
            value = int(s[:-1])
1073
 
            if suffix == u"d":
 
2880
            if suffix == "d":
1074
2881
                delta = datetime.timedelta(value)
1075
 
            elif suffix == u"s":
 
2882
            elif suffix == "s":
1076
2883
                delta = datetime.timedelta(0, value)
1077
 
            elif suffix == u"m":
 
2884
            elif suffix == "m":
1078
2885
                delta = datetime.timedelta(0, 0, 0, 0, value)
1079
 
            elif suffix == u"h":
 
2886
            elif suffix == "h":
1080
2887
                delta = datetime.timedelta(0, 0, 0, 0, 0, value)
1081
 
            elif suffix == u"w":
 
2888
            elif suffix == "w":
1082
2889
                delta = datetime.timedelta(0, 0, 0, 0, 0, 0, value)
1083
2890
            else:
1084
 
                raise ValueError
1085
 
        except (ValueError, IndexError):
1086
 
            raise ValueError
 
2891
                raise ValueError("Unknown suffix {!r}".format(suffix))
 
2892
        except IndexError as e:
 
2893
            raise ValueError(*(e.args))
1087
2894
        timevalue += delta
1088
2895
    return timevalue
1089
2896
 
1090
2897
 
1091
 
def if_nametoindex(interface):
1092
 
    """Call the C function if_nametoindex(), or equivalent
1093
 
    
1094
 
    Note: This function cannot accept a unicode string."""
1095
 
    global if_nametoindex
1096
 
    try:
1097
 
        if_nametoindex = (ctypes.cdll.LoadLibrary
1098
 
                          (ctypes.util.find_library(u"c"))
1099
 
                          .if_nametoindex)
1100
 
    except (OSError, AttributeError):
1101
 
        logger.warning(u"Doing if_nametoindex the hard way")
1102
 
        def if_nametoindex(interface):
1103
 
            "Get an interface index the hard way, i.e. using fcntl()"
1104
 
            SIOCGIFINDEX = 0x8933  # From /usr/include/linux/sockios.h
1105
 
            with closing(socket.socket()) as s:
1106
 
                ifreq = fcntl.ioctl(s, SIOCGIFINDEX,
1107
 
                                    struct.pack(str(u"16s16x"),
1108
 
                                                interface))
1109
 
            interface_index = struct.unpack(str(u"I"),
1110
 
                                            ifreq[16:20])[0]
1111
 
            return interface_index
1112
 
    return if_nametoindex(interface)
1113
 
 
1114
 
 
1115
 
def daemon(nochdir = False, noclose = False):
 
2898
def daemon(nochdir=False, noclose=False):
1116
2899
    """See daemon(3).  Standard BSD Unix function.
1117
 
    
 
2900
 
1118
2901
    This should really exist as os.daemon, but it doesn't (yet)."""
1119
2902
    if os.fork():
1120
2903
        sys.exit()
1121
2904
    os.setsid()
1122
2905
    if not nochdir:
1123
 
        os.chdir(u"/")
 
2906
        os.chdir("/")
1124
2907
    if os.fork():
1125
2908
        sys.exit()
1126
2909
    if not noclose:
1127
2910
        # Close all standard open file descriptors
1128
 
        null = os.open(os.path.devnull, os.O_NOCTTY | os.O_RDWR)
 
2911
        null = os.open(os.devnull, os.O_NOCTTY | os.O_RDWR)
1129
2912
        if not stat.S_ISCHR(os.fstat(null).st_mode):
1130
2913
            raise OSError(errno.ENODEV,
1131
 
                          u"/dev/null not a character device")
 
2914
                          "{} not a character device"
 
2915
                          .format(os.devnull))
1132
2916
        os.dup2(null, sys.stdin.fileno())
1133
2917
        os.dup2(null, sys.stdout.fileno())
1134
2918
        os.dup2(null, sys.stderr.fileno())
1137
2921
 
1138
2922
 
1139
2923
def main():
1140
 
    
1141
 
    ######################################################################
 
2924
 
 
2925
    ##################################################################
1142
2926
    # Parsing of options, both command line and config file
1143
 
    
1144
 
    parser = optparse.OptionParser(version = "%%prog %s" % version)
1145
 
    parser.add_option("-i", u"--interface", type=u"string",
1146
 
                      metavar="IF", help=u"Bind to interface IF")
1147
 
    parser.add_option("-a", u"--address", type=u"string",
1148
 
                      help=u"Address to listen for requests on")
1149
 
    parser.add_option("-p", u"--port", type=u"int",
1150
 
                      help=u"Port number to receive requests on")
1151
 
    parser.add_option("--check", action=u"store_true",
1152
 
                      help=u"Run self-test")
1153
 
    parser.add_option("--debug", action=u"store_true",
1154
 
                      help=u"Debug mode; run in foreground and log to"
1155
 
                      u" terminal")
1156
 
    parser.add_option("--priority", type=u"string", help=u"GnuTLS"
1157
 
                      u" priority string (see GnuTLS documentation)")
1158
 
    parser.add_option("--servicename", type=u"string",
1159
 
                      metavar=u"NAME", help=u"Zeroconf service name")
1160
 
    parser.add_option("--configdir", type=u"string",
1161
 
                      default=u"/etc/mandos", metavar=u"DIR",
1162
 
                      help=u"Directory to search for configuration"
1163
 
                      u" files")
1164
 
    parser.add_option("--no-dbus", action=u"store_false",
1165
 
                      dest=u"use_dbus", help=u"Do not provide D-Bus"
1166
 
                      u" system bus interface")
1167
 
    parser.add_option("--no-ipv6", action=u"store_false",
1168
 
                      dest=u"use_ipv6", help=u"Do not use IPv6")
1169
 
    options = parser.parse_args()[0]
1170
 
    
 
2927
 
 
2928
    parser = argparse.ArgumentParser()
 
2929
    parser.add_argument("-v", "--version", action="version",
 
2930
                        version="%(prog)s {}".format(version),
 
2931
                        help="show version number and exit")
 
2932
    parser.add_argument("-i", "--interface", metavar="IF",
 
2933
                        help="Bind to interface IF")
 
2934
    parser.add_argument("-a", "--address",
 
2935
                        help="Address to listen for requests on")
 
2936
    parser.add_argument("-p", "--port", type=int,
 
2937
                        help="Port number to receive requests on")
 
2938
    parser.add_argument("--check", action="store_true",
 
2939
                        help="Run self-test")
 
2940
    parser.add_argument("--debug", action="store_true",
 
2941
                        help="Debug mode; run in foreground and log"
 
2942
                        " to terminal", default=None)
 
2943
    parser.add_argument("--debuglevel", metavar="LEVEL",
 
2944
                        help="Debug level for stdout output")
 
2945
    parser.add_argument("--priority", help="GnuTLS"
 
2946
                        " priority string (see GnuTLS documentation)")
 
2947
    parser.add_argument("--servicename",
 
2948
                        metavar="NAME", help="Zeroconf service name")
 
2949
    parser.add_argument("--configdir",
 
2950
                        default="/etc/mandos", metavar="DIR",
 
2951
                        help="Directory to search for configuration"
 
2952
                        " files")
 
2953
    parser.add_argument("--no-dbus", action="store_false",
 
2954
                        dest="use_dbus", help="Do not provide D-Bus"
 
2955
                        " system bus interface", default=None)
 
2956
    parser.add_argument("--no-ipv6", action="store_false",
 
2957
                        dest="use_ipv6", help="Do not use IPv6",
 
2958
                        default=None)
 
2959
    parser.add_argument("--no-restore", action="store_false",
 
2960
                        dest="restore", help="Do not restore stored"
 
2961
                        " state", default=None)
 
2962
    parser.add_argument("--socket", type=int,
 
2963
                        help="Specify a file descriptor to a network"
 
2964
                        " socket to use instead of creating one")
 
2965
    parser.add_argument("--statedir", metavar="DIR",
 
2966
                        help="Directory to save/restore state in")
 
2967
    parser.add_argument("--foreground", action="store_true",
 
2968
                        help="Run in foreground", default=None)
 
2969
    parser.add_argument("--no-zeroconf", action="store_false",
 
2970
                        dest="zeroconf", help="Do not use Zeroconf",
 
2971
                        default=None)
 
2972
 
 
2973
    options = parser.parse_args()
 
2974
 
1171
2975
    if options.check:
1172
2976
        import doctest
1173
 
        doctest.testmod()
1174
 
        sys.exit()
1175
 
    
 
2977
        fail_count, test_count = doctest.testmod()
 
2978
        sys.exit(os.EX_OK if fail_count == 0 else 1)
 
2979
 
1176
2980
    # Default values for config file for server-global settings
1177
 
    server_defaults = { u"interface": u"",
1178
 
                        u"address": u"",
1179
 
                        u"port": u"",
1180
 
                        u"debug": u"False",
1181
 
                        u"priority":
1182
 
                        u"SECURE256:!CTYPE-X.509:+CTYPE-OPENPGP",
1183
 
                        u"servicename": u"Mandos",
1184
 
                        u"use_dbus": u"True",
1185
 
                        u"use_ipv6": u"True",
1186
 
                        }
1187
 
    
 
2981
    if gnutls.has_rawpk:
 
2982
        priority = ("SECURE128:!CTYPE-X.509:+CTYPE-RAWPK:!RSA"
 
2983
                    ":!VERS-ALL:+VERS-TLS1.3:%PROFILE_ULTRA")
 
2984
    else:
 
2985
        priority = ("SECURE256:!CTYPE-X.509:+CTYPE-OPENPGP:!RSA"
 
2986
                    ":+SIGN-DSA-SHA256")
 
2987
    server_defaults = {"interface": "",
 
2988
                       "address": "",
 
2989
                       "port": "",
 
2990
                       "debug": "False",
 
2991
                       "priority": priority,
 
2992
                       "servicename": "Mandos",
 
2993
                       "use_dbus": "True",
 
2994
                       "use_ipv6": "True",
 
2995
                       "debuglevel": "",
 
2996
                       "restore": "True",
 
2997
                       "socket": "",
 
2998
                       "statedir": "/var/lib/mandos",
 
2999
                       "foreground": "False",
 
3000
                       "zeroconf": "True",
 
3001
                       }
 
3002
    del priority
 
3003
 
1188
3004
    # Parse config file for server-global settings
1189
 
    server_config = configparser.SafeConfigParser(server_defaults)
 
3005
    server_config = configparser.ConfigParser(server_defaults)
1190
3006
    del server_defaults
1191
 
    server_config.read(os.path.join(options.configdir,
1192
 
                                    u"mandos.conf"))
1193
 
    # Convert the SafeConfigParser object to a dict
 
3007
    server_config.read(os.path.join(options.configdir, "mandos.conf"))
 
3008
    # Convert the ConfigParser object to a dict
1194
3009
    server_settings = server_config.defaults()
1195
3010
    # Use the appropriate methods on the non-string config options
1196
 
    for option in (u"debug", u"use_dbus", u"use_ipv6"):
1197
 
        server_settings[option] = server_config.getboolean(u"DEFAULT",
 
3011
    for option in ("debug", "use_dbus", "use_ipv6", "restore",
 
3012
                   "foreground", "zeroconf"):
 
3013
        server_settings[option] = server_config.getboolean("DEFAULT",
1198
3014
                                                           option)
1199
3015
    if server_settings["port"]:
1200
 
        server_settings["port"] = server_config.getint(u"DEFAULT",
1201
 
                                                       u"port")
 
3016
        server_settings["port"] = server_config.getint("DEFAULT",
 
3017
                                                       "port")
 
3018
    if server_settings["socket"]:
 
3019
        server_settings["socket"] = server_config.getint("DEFAULT",
 
3020
                                                         "socket")
 
3021
        # Later, stdin will, and stdout and stderr might, be dup'ed
 
3022
        # over with an opened os.devnull.  But we don't want this to
 
3023
        # happen with a supplied network socket.
 
3024
        if 0 <= server_settings["socket"] <= 2:
 
3025
            server_settings["socket"] = os.dup(server_settings
 
3026
                                               ["socket"])
1202
3027
    del server_config
1203
 
    
 
3028
 
1204
3029
    # Override the settings from the config file with command line
1205
3030
    # options, if set.
1206
 
    for option in (u"interface", u"address", u"port", u"debug",
1207
 
                   u"priority", u"servicename", u"configdir",
1208
 
                   u"use_dbus", u"use_ipv6"):
 
3031
    for option in ("interface", "address", "port", "debug",
 
3032
                   "priority", "servicename", "configdir", "use_dbus",
 
3033
                   "use_ipv6", "debuglevel", "restore", "statedir",
 
3034
                   "socket", "foreground", "zeroconf"):
1209
3035
        value = getattr(options, option)
1210
3036
        if value is not None:
1211
3037
            server_settings[option] = value
1212
3038
    del options
1213
3039
    # Force all strings to be unicode
1214
3040
    for option in server_settings.keys():
1215
 
        if type(server_settings[option]) is str:
1216
 
            server_settings[option] = unicode(server_settings[option])
 
3041
        if isinstance(server_settings[option], bytes):
 
3042
            server_settings[option] = (server_settings[option]
 
3043
                                       .decode("utf-8"))
 
3044
    # Force all boolean options to be boolean
 
3045
    for option in ("debug", "use_dbus", "use_ipv6", "restore",
 
3046
                   "foreground", "zeroconf"):
 
3047
        server_settings[option] = bool(server_settings[option])
 
3048
    # Debug implies foreground
 
3049
    if server_settings["debug"]:
 
3050
        server_settings["foreground"] = True
1217
3051
    # Now we have our good server settings in "server_settings"
1218
 
    
 
3052
 
1219
3053
    ##################################################################
1220
 
    
 
3054
 
 
3055
    if (not server_settings["zeroconf"]
 
3056
        and not (server_settings["port"]
 
3057
                 or server_settings["socket"] != "")):
 
3058
        parser.error("Needs port or socket to work without Zeroconf")
 
3059
 
1221
3060
    # For convenience
1222
 
    debug = server_settings[u"debug"]
1223
 
    use_dbus = server_settings[u"use_dbus"]
1224
 
    use_ipv6 = server_settings[u"use_ipv6"]
1225
 
    
1226
 
    if not debug:
1227
 
        syslogger.setLevel(logging.WARNING)
1228
 
        console.setLevel(logging.WARNING)
1229
 
    
1230
 
    if server_settings[u"servicename"] != u"Mandos":
1231
 
        syslogger.setFormatter(logging.Formatter
1232
 
                               (u'Mandos (%s) [%%(process)d]:'
1233
 
                                u' %%(levelname)s: %%(message)s'
1234
 
                                % server_settings[u"servicename"]))
1235
 
    
 
3061
    debug = server_settings["debug"]
 
3062
    debuglevel = server_settings["debuglevel"]
 
3063
    use_dbus = server_settings["use_dbus"]
 
3064
    use_ipv6 = server_settings["use_ipv6"]
 
3065
    stored_state_path = os.path.join(server_settings["statedir"],
 
3066
                                     stored_state_file)
 
3067
    foreground = server_settings["foreground"]
 
3068
    zeroconf = server_settings["zeroconf"]
 
3069
 
 
3070
    if debug:
 
3071
        initlogger(debug, logging.DEBUG)
 
3072
    else:
 
3073
        if not debuglevel:
 
3074
            initlogger(debug)
 
3075
        else:
 
3076
            level = getattr(logging, debuglevel.upper())
 
3077
            initlogger(debug, level)
 
3078
 
 
3079
    if server_settings["servicename"] != "Mandos":
 
3080
        syslogger.setFormatter(
 
3081
            logging.Formatter('Mandos ({}) [%(process)d]:'
 
3082
                              ' %(levelname)s: %(message)s'.format(
 
3083
                                  server_settings["servicename"])))
 
3084
 
1236
3085
    # Parse config file with clients
1237
 
    client_defaults = { u"timeout": u"1h",
1238
 
                        u"interval": u"5m",
1239
 
                        u"checker": u"fping -q -- %%(host)s",
1240
 
                        u"host": u"",
1241
 
                        }
1242
 
    client_config = configparser.SafeConfigParser(client_defaults)
1243
 
    client_config.read(os.path.join(server_settings[u"configdir"],
1244
 
                                    u"clients.conf"))
1245
 
    
 
3086
    client_config = configparser.ConfigParser(Client.client_defaults)
 
3087
    client_config.read(os.path.join(server_settings["configdir"],
 
3088
                                    "clients.conf"))
 
3089
 
1246
3090
    global mandos_dbus_service
1247
3091
    mandos_dbus_service = None
1248
 
    
1249
 
    clients = set()
1250
 
    tcp_server = IPv6_TCPServer((server_settings[u"address"],
1251
 
                                 server_settings[u"port"]),
1252
 
                                ClientHandler,
1253
 
                                interface=
1254
 
                                server_settings[u"interface"],
1255
 
                                use_ipv6=use_ipv6,
1256
 
                                clients=clients,
1257
 
                                gnutls_priority=
1258
 
                                server_settings[u"priority"],
1259
 
                                use_dbus=use_dbus)
1260
 
    pidfilename = u"/var/run/mandos.pid"
1261
 
    try:
1262
 
        pidfile = open(pidfilename, u"w")
1263
 
    except IOError:
1264
 
        logger.error(u"Could not open file %r", pidfilename)
1265
 
    
1266
 
    try:
1267
 
        uid = pwd.getpwnam(u"_mandos").pw_uid
1268
 
        gid = pwd.getpwnam(u"_mandos").pw_gid
1269
 
    except KeyError:
1270
 
        try:
1271
 
            uid = pwd.getpwnam(u"mandos").pw_uid
1272
 
            gid = pwd.getpwnam(u"mandos").pw_gid
 
3092
 
 
3093
    socketfd = None
 
3094
    if server_settings["socket"] != "":
 
3095
        socketfd = server_settings["socket"]
 
3096
    tcp_server = MandosServer(
 
3097
        (server_settings["address"], server_settings["port"]),
 
3098
        ClientHandler,
 
3099
        interface=(server_settings["interface"] or None),
 
3100
        use_ipv6=use_ipv6,
 
3101
        gnutls_priority=server_settings["priority"],
 
3102
        use_dbus=use_dbus,
 
3103
        socketfd=socketfd)
 
3104
    if not foreground:
 
3105
        pidfilename = "/run/mandos.pid"
 
3106
        if not os.path.isdir("/run/."):
 
3107
            pidfilename = "/var/run/mandos.pid"
 
3108
        pidfile = None
 
3109
        try:
 
3110
            pidfile = codecs.open(pidfilename, "w", encoding="utf-8")
 
3111
        except IOError as e:
 
3112
            logger.error("Could not open file %r", pidfilename,
 
3113
                         exc_info=e)
 
3114
 
 
3115
    for name, group in (("_mandos", "_mandos"),
 
3116
                        ("mandos", "mandos"),
 
3117
                        ("nobody", "nogroup")):
 
3118
        try:
 
3119
            uid = pwd.getpwnam(name).pw_uid
 
3120
            gid = pwd.getpwnam(group).pw_gid
 
3121
            break
1273
3122
        except KeyError:
1274
 
            try:
1275
 
                uid = pwd.getpwnam(u"nobody").pw_uid
1276
 
                gid = pwd.getpwnam(u"nobody").pw_gid
1277
 
            except KeyError:
1278
 
                uid = 65534
1279
 
                gid = 65534
 
3123
            continue
 
3124
    else:
 
3125
        uid = 65534
 
3126
        gid = 65534
1280
3127
    try:
1281
3128
        os.setgid(gid)
1282
3129
        os.setuid(uid)
1283
 
    except OSError, error:
1284
 
        if error[0] != errno.EPERM:
1285
 
            raise error
1286
 
    
1287
 
    # Enable all possible GnuTLS debugging
 
3130
        if debug:
 
3131
            logger.debug("Did setuid/setgid to {}:{}".format(uid,
 
3132
                                                             gid))
 
3133
    except OSError as error:
 
3134
        logger.warning("Failed to setuid/setgid to {}:{}: {}"
 
3135
                       .format(uid, gid, os.strerror(error.errno)))
 
3136
        if error.errno != errno.EPERM:
 
3137
            raise
 
3138
 
1288
3139
    if debug:
 
3140
        # Enable all possible GnuTLS debugging
 
3141
 
1289
3142
        # "Use a log level over 10 to enable all debugging options."
1290
3143
        # - GnuTLS manual
1291
 
        gnutls.library.functions.gnutls_global_set_log_level(11)
1292
 
        
1293
 
        @gnutls.library.types.gnutls_log_func
 
3144
        gnutls.global_set_log_level(11)
 
3145
 
 
3146
        @gnutls.log_func
1294
3147
        def debug_gnutls(level, string):
1295
 
            logger.debug(u"GnuTLS: %s", string[:-1])
1296
 
        
1297
 
        (gnutls.library.functions
1298
 
         .gnutls_global_set_log_function(debug_gnutls))
1299
 
    
1300
 
    global service
1301
 
    protocol = avahi.PROTO_INET6 if use_ipv6 else avahi.PROTO_INET
1302
 
    service = AvahiService(name = server_settings[u"servicename"],
1303
 
                           servicetype = u"_mandos._tcp",
1304
 
                           protocol = protocol)
1305
 
    if server_settings["interface"]:
1306
 
        service.interface = (if_nametoindex
1307
 
                             (str(server_settings[u"interface"])))
1308
 
    
 
3148
            logger.debug("GnuTLS: %s", string[:-1])
 
3149
 
 
3150
        gnutls.global_set_log_function(debug_gnutls)
 
3151
 
 
3152
        # Redirect stdin so all checkers get /dev/null
 
3153
        null = os.open(os.devnull, os.O_NOCTTY | os.O_RDWR)
 
3154
        os.dup2(null, sys.stdin.fileno())
 
3155
        if null > 2:
 
3156
            os.close(null)
 
3157
 
 
3158
    # Need to fork before connecting to D-Bus
 
3159
    if not foreground:
 
3160
        # Close all input and output, do double fork, etc.
 
3161
        daemon()
 
3162
 
 
3163
    if gi.version_info < (3, 10, 2):
 
3164
        # multiprocessing will use threads, so before we use GLib we
 
3165
        # need to inform GLib that threads will be used.
 
3166
        GLib.threads_init()
 
3167
 
1309
3168
    global main_loop
1310
 
    global bus
1311
3169
    # From the Avahi example code
1312
 
    DBusGMainLoop(set_as_default=True )
1313
 
    main_loop = gobject.MainLoop()
 
3170
    DBusGMainLoop(set_as_default=True)
 
3171
    main_loop = GLib.MainLoop()
1314
3172
    bus = dbus.SystemBus()
1315
3173
    # End of Avahi example code
1316
3174
    if use_dbus:
1317
 
        bus_name = dbus.service.BusName(u"se.bsnet.fukt.Mandos", bus)
1318
 
    
 
3175
        try:
 
3176
            bus_name = dbus.service.BusName("se.recompile.Mandos",
 
3177
                                            bus,
 
3178
                                            do_not_queue=True)
 
3179
            old_bus_name = dbus.service.BusName(
 
3180
                "se.bsnet.fukt.Mandos", bus,
 
3181
                do_not_queue=True)
 
3182
        except dbus.exceptions.DBusException as e:
 
3183
            logger.error("Disabling D-Bus:", exc_info=e)
 
3184
            use_dbus = False
 
3185
            server_settings["use_dbus"] = False
 
3186
            tcp_server.use_dbus = False
 
3187
    if zeroconf:
 
3188
        protocol = avahi.PROTO_INET6 if use_ipv6 else avahi.PROTO_INET
 
3189
        service = AvahiServiceToSyslog(
 
3190
            name=server_settings["servicename"],
 
3191
            servicetype="_mandos._tcp",
 
3192
            protocol=protocol,
 
3193
            bus=bus)
 
3194
        if server_settings["interface"]:
 
3195
            service.interface = if_nametoindex(
 
3196
                server_settings["interface"].encode("utf-8"))
 
3197
 
 
3198
    global multiprocessing_manager
 
3199
    multiprocessing_manager = multiprocessing.Manager()
 
3200
 
1319
3201
    client_class = Client
1320
3202
    if use_dbus:
1321
 
        client_class = ClientDBus
1322
 
    clients.update(set(
1323
 
            client_class(name = section,
1324
 
                         config= dict(client_config.items(section)))
1325
 
            for section in client_config.sections()))
1326
 
    if not clients:
1327
 
        logger.warning(u"No clients defined")
1328
 
    
1329
 
    if debug:
1330
 
        # Redirect stdin so all checkers get /dev/null
1331
 
        null = os.open(os.path.devnull, os.O_NOCTTY | os.O_RDWR)
1332
 
        os.dup2(null, sys.stdin.fileno())
1333
 
        if null > 2:
1334
 
            os.close(null)
1335
 
    else:
1336
 
        # No console logging
1337
 
        logger.removeHandler(console)
1338
 
        # Close all input and output, do double fork, etc.
1339
 
        daemon()
1340
 
    
1341
 
    try:
1342
 
        with closing(pidfile):
 
3203
        client_class = functools.partial(ClientDBus, bus=bus)
 
3204
 
 
3205
    client_settings = Client.config_parser(client_config)
 
3206
    old_client_settings = {}
 
3207
    clients_data = {}
 
3208
 
 
3209
    # This is used to redirect stdout and stderr for checker processes
 
3210
    global wnull
 
3211
    wnull = open(os.devnull, "w")  # A writable /dev/null
 
3212
    # Only used if server is running in foreground but not in debug
 
3213
    # mode
 
3214
    if debug or not foreground:
 
3215
        wnull.close()
 
3216
 
 
3217
    # Get client data and settings from last running state.
 
3218
    if server_settings["restore"]:
 
3219
        try:
 
3220
            with open(stored_state_path, "rb") as stored_state:
 
3221
                if sys.version_info.major == 2:
 
3222
                    clients_data, old_client_settings = pickle.load(
 
3223
                        stored_state)
 
3224
                else:
 
3225
                    bytes_clients_data, bytes_old_client_settings = (
 
3226
                        pickle.load(stored_state, encoding="bytes"))
 
3227
                    #   Fix bytes to strings
 
3228
                    #  clients_data
 
3229
                    # .keys()
 
3230
                    clients_data = {(key.decode("utf-8")
 
3231
                                     if isinstance(key, bytes)
 
3232
                                     else key): value
 
3233
                                    for key, value in
 
3234
                                    bytes_clients_data.items()}
 
3235
                    del bytes_clients_data
 
3236
                    for key in clients_data:
 
3237
                        value = {(k.decode("utf-8")
 
3238
                                  if isinstance(k, bytes) else k): v
 
3239
                                 for k, v in
 
3240
                                 clients_data[key].items()}
 
3241
                        clients_data[key] = value
 
3242
                        # .client_structure
 
3243
                        value["client_structure"] = [
 
3244
                            (s.decode("utf-8")
 
3245
                             if isinstance(s, bytes)
 
3246
                             else s) for s in
 
3247
                            value["client_structure"]]
 
3248
                        # .name & .host
 
3249
                        for k in ("name", "host"):
 
3250
                            if isinstance(value[k], bytes):
 
3251
                                value[k] = value[k].decode("utf-8")
 
3252
                        if "key_id" not in value:
 
3253
                            value["key_id"] = ""
 
3254
                        elif "fingerprint" not in value:
 
3255
                            value["fingerprint"] = ""
 
3256
                    #  old_client_settings
 
3257
                    # .keys()
 
3258
                    old_client_settings = {
 
3259
                        (key.decode("utf-8")
 
3260
                         if isinstance(key, bytes)
 
3261
                         else key): value
 
3262
                        for key, value in
 
3263
                        bytes_old_client_settings.items()}
 
3264
                    del bytes_old_client_settings
 
3265
                    # .host
 
3266
                    for value in old_client_settings.values():
 
3267
                        if isinstance(value["host"], bytes):
 
3268
                            value["host"] = (value["host"]
 
3269
                                             .decode("utf-8"))
 
3270
            os.remove(stored_state_path)
 
3271
        except IOError as e:
 
3272
            if e.errno == errno.ENOENT:
 
3273
                logger.warning("Could not load persistent state:"
 
3274
                               " {}".format(os.strerror(e.errno)))
 
3275
            else:
 
3276
                logger.critical("Could not load persistent state:",
 
3277
                                exc_info=e)
 
3278
                raise
 
3279
        except EOFError as e:
 
3280
            logger.warning("Could not load persistent state: "
 
3281
                           "EOFError:",
 
3282
                           exc_info=e)
 
3283
 
 
3284
    with PGPEngine() as pgp:
 
3285
        for client_name, client in clients_data.items():
 
3286
            # Skip removed clients
 
3287
            if client_name not in client_settings:
 
3288
                continue
 
3289
 
 
3290
            # Decide which value to use after restoring saved state.
 
3291
            # We have three different values: Old config file,
 
3292
            # new config file, and saved state.
 
3293
            # New config value takes precedence if it differs from old
 
3294
            # config value, otherwise use saved state.
 
3295
            for name, value in client_settings[client_name].items():
 
3296
                try:
 
3297
                    # For each value in new config, check if it
 
3298
                    # differs from the old config value (Except for
 
3299
                    # the "secret" attribute)
 
3300
                    if (name != "secret"
 
3301
                        and (value !=
 
3302
                             old_client_settings[client_name][name])):
 
3303
                        client[name] = value
 
3304
                except KeyError:
 
3305
                    pass
 
3306
 
 
3307
            # Clients who has passed its expire date can still be
 
3308
            # enabled if its last checker was successful.  A Client
 
3309
            # whose checker succeeded before we stored its state is
 
3310
            # assumed to have successfully run all checkers during
 
3311
            # downtime.
 
3312
            if client["enabled"]:
 
3313
                if datetime.datetime.utcnow() >= client["expires"]:
 
3314
                    if not client["last_checked_ok"]:
 
3315
                        logger.warning(
 
3316
                            "disabling client {} - Client never "
 
3317
                            "performed a successful checker".format(
 
3318
                                client_name))
 
3319
                        client["enabled"] = False
 
3320
                    elif client["last_checker_status"] != 0:
 
3321
                        logger.warning(
 
3322
                            "disabling client {} - Client last"
 
3323
                            " checker failed with error code"
 
3324
                            " {}".format(
 
3325
                                client_name,
 
3326
                                client["last_checker_status"]))
 
3327
                        client["enabled"] = False
 
3328
                    else:
 
3329
                        client["expires"] = (
 
3330
                            datetime.datetime.utcnow()
 
3331
                            + client["timeout"])
 
3332
                        logger.debug("Last checker succeeded,"
 
3333
                                     " keeping {} enabled".format(
 
3334
                                         client_name))
 
3335
            try:
 
3336
                client["secret"] = pgp.decrypt(
 
3337
                    client["encrypted_secret"],
 
3338
                    client_settings[client_name]["secret"])
 
3339
            except PGPError:
 
3340
                # If decryption fails, we use secret from new settings
 
3341
                logger.debug("Failed to decrypt {} old secret".format(
 
3342
                    client_name))
 
3343
                client["secret"] = (client_settings[client_name]
 
3344
                                    ["secret"])
 
3345
 
 
3346
    # Add/remove clients based on new changes made to config
 
3347
    for client_name in (set(old_client_settings)
 
3348
                        - set(client_settings)):
 
3349
        del clients_data[client_name]
 
3350
    for client_name in (set(client_settings)
 
3351
                        - set(old_client_settings)):
 
3352
        clients_data[client_name] = client_settings[client_name]
 
3353
 
 
3354
    # Create all client objects
 
3355
    for client_name, client in clients_data.items():
 
3356
        tcp_server.clients[client_name] = client_class(
 
3357
            name=client_name,
 
3358
            settings=client,
 
3359
            server_settings=server_settings)
 
3360
 
 
3361
    if not tcp_server.clients:
 
3362
        logger.warning("No clients defined")
 
3363
 
 
3364
    if not foreground:
 
3365
        if pidfile is not None:
1343
3366
            pid = os.getpid()
1344
 
            pidfile.write(str(pid) + "\n")
 
3367
            try:
 
3368
                with pidfile:
 
3369
                    print(pid, file=pidfile)
 
3370
            except IOError:
 
3371
                logger.error("Could not write to file %r with PID %d",
 
3372
                             pidfilename, pid)
1345
3373
        del pidfile
1346
 
    except IOError:
1347
 
        logger.error(u"Could not write to file %r with PID %d",
1348
 
                     pidfilename, pid)
1349
 
    except NameError:
1350
 
        # "pidfile" was never created
1351
 
        pass
1352
 
    del pidfilename
1353
 
    
1354
 
    def cleanup():
1355
 
        "Cleanup function; run on exit"
1356
 
        service.cleanup()
1357
 
        
1358
 
        while clients:
1359
 
            client = clients.pop()
1360
 
            client.disable_hook = None
1361
 
            client.disable()
1362
 
    
1363
 
    atexit.register(cleanup)
1364
 
    
1365
 
    if not debug:
1366
 
        signal.signal(signal.SIGINT, signal.SIG_IGN)
1367
 
    signal.signal(signal.SIGHUP, lambda signum, frame: sys.exit())
1368
 
    signal.signal(signal.SIGTERM, lambda signum, frame: sys.exit())
1369
 
    
 
3374
        del pidfilename
 
3375
 
 
3376
    for termsig in (signal.SIGHUP, signal.SIGTERM):
 
3377
        GLib.unix_signal_add(GLib.PRIORITY_HIGH, termsig,
 
3378
                             lambda: main_loop.quit() and False)
 
3379
 
1370
3380
    if use_dbus:
1371
 
        class MandosDBusService(dbus.service.Object):
 
3381
 
 
3382
        @alternate_dbus_interfaces(
 
3383
            {"se.recompile.Mandos": "se.bsnet.fukt.Mandos"})
 
3384
        class MandosDBusService(DBusObjectWithObjectManager):
1372
3385
            """A D-Bus proxy object"""
 
3386
 
1373
3387
            def __init__(self):
1374
 
                dbus.service.Object.__init__(self, bus, u"/")
1375
 
            _interface = u"se.bsnet.fukt.Mandos"
1376
 
            
1377
 
            @dbus.service.signal(_interface, signature=u"oa{sv}")
1378
 
            def ClientAdded(self, objpath, properties):
1379
 
                "D-Bus signal"
1380
 
                pass
1381
 
            
1382
 
            @dbus.service.signal(_interface, signature=u"s")
1383
 
            def ClientNotFound(self, fingerprint):
1384
 
                "D-Bus signal"
1385
 
                pass
1386
 
            
1387
 
            @dbus.service.signal(_interface, signature=u"os")
 
3388
                dbus.service.Object.__init__(self, bus, "/")
 
3389
 
 
3390
            _interface = "se.recompile.Mandos"
 
3391
 
 
3392
            @dbus.service.signal(_interface, signature="o")
 
3393
            def ClientAdded(self, objpath):
 
3394
                "D-Bus signal"
 
3395
                pass
 
3396
 
 
3397
            @dbus.service.signal(_interface, signature="ss")
 
3398
            def ClientNotFound(self, key_id, address):
 
3399
                "D-Bus signal"
 
3400
                pass
 
3401
 
 
3402
            @dbus_annotations({"org.freedesktop.DBus.Deprecated":
 
3403
                               "true"})
 
3404
            @dbus.service.signal(_interface, signature="os")
1388
3405
            def ClientRemoved(self, objpath, name):
1389
3406
                "D-Bus signal"
1390
3407
                pass
1391
 
            
1392
 
            @dbus.service.method(_interface, out_signature=u"ao")
 
3408
 
 
3409
            @dbus_annotations({"org.freedesktop.DBus.Deprecated":
 
3410
                               "true"})
 
3411
            @dbus.service.method(_interface, out_signature="ao")
1393
3412
            def GetAllClients(self):
1394
3413
                "D-Bus method"
1395
 
                return dbus.Array(c.dbus_object_path for c in clients)
1396
 
            
 
3414
                return dbus.Array(c.dbus_object_path for c in
 
3415
                                  tcp_server.clients.values())
 
3416
 
 
3417
            @dbus_annotations({"org.freedesktop.DBus.Deprecated":
 
3418
                               "true"})
1397
3419
            @dbus.service.method(_interface,
1398
 
                                 out_signature=u"a{oa{sv}}")
 
3420
                                 out_signature="a{oa{sv}}")
1399
3421
            def GetAllClientsWithProperties(self):
1400
3422
                "D-Bus method"
1401
3423
                return dbus.Dictionary(
1402
 
                    ((c.dbus_object_path, c.GetAllProperties())
1403
 
                     for c in clients),
1404
 
                    signature=u"oa{sv}")
1405
 
            
1406
 
            @dbus.service.method(_interface, in_signature=u"o")
 
3424
                    {c.dbus_object_path: c.GetAll(
 
3425
                        "se.recompile.Mandos.Client")
 
3426
                     for c in tcp_server.clients.values()},
 
3427
                    signature="oa{sv}")
 
3428
 
 
3429
            @dbus.service.method(_interface, in_signature="o")
1407
3430
            def RemoveClient(self, object_path):
1408
3431
                "D-Bus method"
1409
 
                for c in clients:
 
3432
                for c in tcp_server.clients.values():
1410
3433
                    if c.dbus_object_path == object_path:
1411
 
                        clients.remove(c)
 
3434
                        del tcp_server.clients[c.name]
1412
3435
                        c.remove_from_connection()
1413
 
                        # Don't signal anything except ClientRemoved
1414
 
                        c.disable(signal=False)
1415
 
                        # Emit D-Bus signal
1416
 
                        self.ClientRemoved(object_path, c.name)
 
3436
                        # Don't signal the disabling
 
3437
                        c.disable(quiet=True)
 
3438
                        # Emit D-Bus signal for removal
 
3439
                        self.client_removed_signal(c)
1417
3440
                        return
1418
 
                raise KeyError
1419
 
            
 
3441
                raise KeyError(object_path)
 
3442
 
1420
3443
            del _interface
1421
 
        
 
3444
 
 
3445
            @dbus.service.method(dbus.OBJECT_MANAGER_IFACE,
 
3446
                                 out_signature="a{oa{sa{sv}}}")
 
3447
            def GetManagedObjects(self):
 
3448
                """D-Bus method"""
 
3449
                return dbus.Dictionary(
 
3450
                    {client.dbus_object_path:
 
3451
                     dbus.Dictionary(
 
3452
                         {interface: client.GetAll(interface)
 
3453
                          for interface in
 
3454
                          client._get_all_interface_names()})
 
3455
                     for client in tcp_server.clients.values()})
 
3456
 
 
3457
            def client_added_signal(self, client):
 
3458
                """Send the new standard signal and the old signal"""
 
3459
                if use_dbus:
 
3460
                    # New standard signal
 
3461
                    self.InterfacesAdded(
 
3462
                        client.dbus_object_path,
 
3463
                        dbus.Dictionary(
 
3464
                            {interface: client.GetAll(interface)
 
3465
                             for interface in
 
3466
                             client._get_all_interface_names()}))
 
3467
                    # Old signal
 
3468
                    self.ClientAdded(client.dbus_object_path)
 
3469
 
 
3470
            def client_removed_signal(self, client):
 
3471
                """Send the new standard signal and the old signal"""
 
3472
                if use_dbus:
 
3473
                    # New standard signal
 
3474
                    self.InterfacesRemoved(
 
3475
                        client.dbus_object_path,
 
3476
                        client._get_all_interface_names())
 
3477
                    # Old signal
 
3478
                    self.ClientRemoved(client.dbus_object_path,
 
3479
                                       client.name)
 
3480
 
1422
3481
        mandos_dbus_service = MandosDBusService()
1423
 
    
1424
 
    for client in clients:
 
3482
 
 
3483
    # Save modules to variables to exempt the modules from being
 
3484
    # unloaded before the function registered with atexit() is run.
 
3485
    mp = multiprocessing
 
3486
    wn = wnull
 
3487
 
 
3488
    def cleanup():
 
3489
        "Cleanup function; run on exit"
 
3490
        if zeroconf:
 
3491
            service.cleanup()
 
3492
 
 
3493
        mp.active_children()
 
3494
        wn.close()
 
3495
        if not (tcp_server.clients or client_settings):
 
3496
            return
 
3497
 
 
3498
        # Store client before exiting. Secrets are encrypted with key
 
3499
        # based on what config file has. If config file is
 
3500
        # removed/edited, old secret will thus be unrecovable.
 
3501
        clients = {}
 
3502
        with PGPEngine() as pgp:
 
3503
            for client in tcp_server.clients.values():
 
3504
                key = client_settings[client.name]["secret"]
 
3505
                client.encrypted_secret = pgp.encrypt(client.secret,
 
3506
                                                      key)
 
3507
                client_dict = {}
 
3508
 
 
3509
                # A list of attributes that can not be pickled
 
3510
                # + secret.
 
3511
                exclude = {"bus", "changedstate", "secret",
 
3512
                           "checker", "server_settings"}
 
3513
                for name, typ in inspect.getmembers(dbus.service
 
3514
                                                    .Object):
 
3515
                    exclude.add(name)
 
3516
 
 
3517
                client_dict["encrypted_secret"] = (client
 
3518
                                                   .encrypted_secret)
 
3519
                for attr in client.client_structure:
 
3520
                    if attr not in exclude:
 
3521
                        client_dict[attr] = getattr(client, attr)
 
3522
 
 
3523
                clients[client.name] = client_dict
 
3524
                del client_settings[client.name]["secret"]
 
3525
 
 
3526
        try:
 
3527
            with tempfile.NamedTemporaryFile(
 
3528
                    mode='wb',
 
3529
                    suffix=".pickle",
 
3530
                    prefix='clients-',
 
3531
                    dir=os.path.dirname(stored_state_path),
 
3532
                    delete=False) as stored_state:
 
3533
                pickle.dump((clients, client_settings), stored_state,
 
3534
                            protocol=2)
 
3535
                tempname = stored_state.name
 
3536
            os.rename(tempname, stored_state_path)
 
3537
        except (IOError, OSError) as e:
 
3538
            if not debug:
 
3539
                try:
 
3540
                    os.remove(tempname)
 
3541
                except NameError:
 
3542
                    pass
 
3543
            if e.errno in (errno.ENOENT, errno.EACCES, errno.EEXIST):
 
3544
                logger.warning("Could not save persistent state: {}"
 
3545
                               .format(os.strerror(e.errno)))
 
3546
            else:
 
3547
                logger.warning("Could not save persistent state:",
 
3548
                               exc_info=e)
 
3549
                raise
 
3550
 
 
3551
        # Delete all clients, and settings from config
 
3552
        while tcp_server.clients:
 
3553
            name, client = tcp_server.clients.popitem()
 
3554
            if use_dbus:
 
3555
                client.remove_from_connection()
 
3556
            # Don't signal the disabling
 
3557
            client.disable(quiet=True)
 
3558
            # Emit D-Bus signal for removal
 
3559
            if use_dbus:
 
3560
                mandos_dbus_service.client_removed_signal(client)
 
3561
        client_settings.clear()
 
3562
 
 
3563
    atexit.register(cleanup)
 
3564
 
 
3565
    for client in tcp_server.clients.values():
1425
3566
        if use_dbus:
1426
 
            # Emit D-Bus signal
1427
 
            mandos_dbus_service.ClientAdded(client.dbus_object_path,
1428
 
                                            client.GetAllProperties())
1429
 
        client.enable()
1430
 
    
 
3567
            # Emit D-Bus signal for adding
 
3568
            mandos_dbus_service.client_added_signal(client)
 
3569
        # Need to initiate checking of clients
 
3570
        if client.enabled:
 
3571
            client.init_checker()
 
3572
 
1431
3573
    tcp_server.enable()
1432
3574
    tcp_server.server_activate()
1433
 
    
 
3575
 
1434
3576
    # Find out what port we got
1435
 
    service.port = tcp_server.socket.getsockname()[1]
 
3577
    if zeroconf:
 
3578
        service.port = tcp_server.socket.getsockname()[1]
1436
3579
    if use_ipv6:
1437
 
        logger.info(u"Now listening on address %r, port %d,"
1438
 
                    " flowinfo %d, scope_id %d"
1439
 
                    % tcp_server.socket.getsockname())
 
3580
        logger.info("Now listening on address %r, port %d,"
 
3581
                    " flowinfo %d, scope_id %d",
 
3582
                    *tcp_server.socket.getsockname())
1440
3583
    else:                       # IPv4
1441
 
        logger.info(u"Now listening on address %r, port %d"
1442
 
                    % tcp_server.socket.getsockname())
1443
 
    
1444
 
    #service.interface = tcp_server.socket.getsockname()[3]
1445
 
    
 
3584
        logger.info("Now listening on address %r, port %d",
 
3585
                    *tcp_server.socket.getsockname())
 
3586
 
 
3587
    # service.interface = tcp_server.socket.getsockname()[3]
 
3588
 
1446
3589
    try:
1447
 
        # From the Avahi example code
1448
 
        try:
1449
 
            service.activate()
1450
 
        except dbus.exceptions.DBusException, error:
1451
 
            logger.critical(u"DBusException: %s", error)
1452
 
            sys.exit(1)
1453
 
        # End of Avahi example code
1454
 
        
1455
 
        gobject.io_add_watch(tcp_server.fileno(), gobject.IO_IN,
1456
 
                             lambda *args, **kwargs:
1457
 
                             (tcp_server.handle_request
1458
 
                              (*args[2:], **kwargs) or True))
1459
 
        
1460
 
        logger.debug(u"Starting main loop")
 
3590
        if zeroconf:
 
3591
            # From the Avahi example code
 
3592
            try:
 
3593
                service.activate()
 
3594
            except dbus.exceptions.DBusException as error:
 
3595
                logger.critical("D-Bus Exception", exc_info=error)
 
3596
                cleanup()
 
3597
                sys.exit(1)
 
3598
            # End of Avahi example code
 
3599
 
 
3600
        GLib.io_add_watch(tcp_server.fileno(), GLib.IO_IN,
 
3601
                          lambda *args, **kwargs:
 
3602
                          (tcp_server.handle_request
 
3603
                           (*args[2:], **kwargs) or True))
 
3604
 
 
3605
        logger.debug("Starting main loop")
1461
3606
        main_loop.run()
1462
 
    except AvahiError, error:
1463
 
        logger.critical(u"AvahiError: %s", error)
 
3607
    except AvahiError as error:
 
3608
        logger.critical("Avahi Error", exc_info=error)
 
3609
        cleanup()
1464
3610
        sys.exit(1)
1465
3611
    except KeyboardInterrupt:
1466
3612
        if debug:
1467
 
            print >> sys.stderr
1468
 
        logger.debug(u"Server received KeyboardInterrupt")
1469
 
    logger.debug(u"Server exiting")
 
3613
            print("", file=sys.stderr)
 
3614
        logger.debug("Server received KeyboardInterrupt")
 
3615
    logger.debug("Server exiting")
 
3616
    # Must run before the D-Bus bus name gets deregistered
 
3617
    cleanup()
 
3618
 
1470
3619
 
1471
3620
if __name__ == '__main__':
1472
3621
    main()