/mandos/trunk

To get this branch, use:
bzr branch http://bzr.recompile.se/loggerhead/mandos/trunk

« back to all changes in this revision

Viewing changes to mandos

  • Committer: Teddy Hogeborn
  • Date: 2016-10-08 04:11:22 UTC
  • Revision ID: teddy@recompile.se-20161008041122-xdqj4sw9h9i461fu
Fix bug when generating keys in a chroot environment.

* mandos-keygen (keygen): Use "%no-protection" statement in GnuPG
                          batch parameter file to make GnuPG 2.1 not
                          try to ask for a passphrase interactively.

Show diffs side-by-side

added added

removed removed

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 © 2008-2011 Teddy Hogeborn
15
 
# Copyright © 2008-2011 Björn Påhlsson
16
 
# 
 
14
# Copyright © 2008-2016 Teddy Hogeborn
 
15
# Copyright © 2008-2016 Björn Påhlsson
 
16
#
17
17
# This program is free software: you can redistribute it and/or modify
18
18
# it under the terms of the GNU General Public License as published by
19
19
# the Free Software Foundation, either version 3 of the License, or
23
23
#     but WITHOUT ANY WARRANTY; without even the implied warranty of
24
24
#     MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
25
25
#     GNU General Public License for more details.
26
 
# 
 
26
#
27
27
# You should have received a copy of the GNU General Public License
28
28
# along with this program.  If not, see
29
29
# <http://www.gnu.org/licenses/>.
30
 
# 
31
 
# Contact the authors at <mandos@fukt.bsnet.se>.
32
 
# 
 
30
#
 
31
# Contact the authors at <mandos@recompile.se>.
 
32
#
33
33
 
34
34
from __future__ import (division, absolute_import, print_function,
35
35
                        unicode_literals)
36
36
 
37
 
import SocketServer as socketserver
 
37
try:
 
38
    from future_builtins import *
 
39
except ImportError:
 
40
    pass
 
41
 
 
42
try:
 
43
    import SocketServer as socketserver
 
44
except ImportError:
 
45
    import socketserver
38
46
import socket
39
47
import argparse
40
48
import datetime
41
49
import errno
42
 
import gnutls.crypto
43
 
import gnutls.connection
44
 
import gnutls.errors
45
 
import gnutls.library.functions
46
 
import gnutls.library.constants
47
 
import gnutls.library.types
48
 
import ConfigParser as configparser
 
50
try:
 
51
    import ConfigParser as configparser
 
52
except ImportError:
 
53
    import configparser
49
54
import sys
50
55
import re
51
56
import os
60
65
import struct
61
66
import fcntl
62
67
import functools
63
 
import cPickle as pickle
 
68
try:
 
69
    import cPickle as pickle
 
70
except ImportError:
 
71
    import pickle
64
72
import multiprocessing
 
73
import types
 
74
import binascii
 
75
import tempfile
 
76
import itertools
 
77
import collections
 
78
import codecs
65
79
 
66
80
import dbus
67
81
import dbus.service
68
 
import gobject
69
 
import avahi
 
82
from gi.repository import GLib
70
83
from dbus.mainloop.glib import DBusGMainLoop
71
84
import ctypes
72
85
import ctypes.util
73
86
import xml.dom.minidom
74
87
import inspect
75
88
 
 
89
# Try to find the value of SO_BINDTODEVICE:
76
90
try:
 
91
    # This is where SO_BINDTODEVICE is in Python 3.3 (or 3.4?) and
 
92
    # newer, and it is also the most natural place for it:
77
93
    SO_BINDTODEVICE = socket.SO_BINDTODEVICE
78
94
except AttributeError:
79
95
    try:
 
96
        # This is where SO_BINDTODEVICE was up to and including Python
 
97
        # 2.6, and also 3.2:
80
98
        from IN import SO_BINDTODEVICE
81
99
    except ImportError:
82
 
        SO_BINDTODEVICE = None
83
 
 
84
 
 
85
 
version = "1.3.0"
86
 
 
87
 
#logger = logging.getLogger('mandos')
88
 
logger = logging.Logger('mandos')
89
 
syslogger = (logging.handlers.SysLogHandler
90
 
             (facility = logging.handlers.SysLogHandler.LOG_DAEMON,
91
 
              address = str("/dev/log")))
92
 
syslogger.setFormatter(logging.Formatter
93
 
                       ('Mandos [%(process)d]: %(levelname)s:'
94
 
                        ' %(message)s'))
95
 
logger.addHandler(syslogger)
96
 
 
97
 
console = logging.StreamHandler()
98
 
console.setFormatter(logging.Formatter('%(name)s [%(process)d]:'
99
 
                                       ' %(levelname)s:'
100
 
                                       ' %(message)s'))
101
 
logger.addHandler(console)
 
100
        # In Python 2.7 it seems to have been removed entirely.
 
101
        # Try running the C preprocessor:
 
102
        try:
 
103
            cc = subprocess.Popen(["cc", "--language=c", "-E",
 
104
                                   "/dev/stdin"],
 
105
                                  stdin=subprocess.PIPE,
 
106
                                  stdout=subprocess.PIPE)
 
107
            stdout = cc.communicate(
 
108
                "#include <sys/socket.h>\nSO_BINDTODEVICE\n")[0]
 
109
            SO_BINDTODEVICE = int(stdout.splitlines()[-1])
 
110
        except (OSError, ValueError, IndexError):
 
111
            # No value found
 
112
            SO_BINDTODEVICE = None
 
113
 
 
114
if sys.version_info.major == 2:
 
115
    str = unicode
 
116
 
 
117
version = "1.7.12"
 
118
stored_state_file = "clients.pickle"
 
119
 
 
120
logger = logging.getLogger()
 
121
syslogger = None
 
122
 
 
123
try:
 
124
    if_nametoindex = ctypes.cdll.LoadLibrary(
 
125
        ctypes.util.find_library("c")).if_nametoindex
 
126
except (OSError, AttributeError):
 
127
 
 
128
    def if_nametoindex(interface):
 
129
        "Get an interface index the hard way, i.e. using fcntl()"
 
130
        SIOCGIFINDEX = 0x8933  # From /usr/include/linux/sockios.h
 
131
        with contextlib.closing(socket.socket()) as s:
 
132
            ifreq = fcntl.ioctl(s, SIOCGIFINDEX,
 
133
                                struct.pack(b"16s16x", interface))
 
134
        interface_index = struct.unpack("I", ifreq[16:20])[0]
 
135
        return interface_index
 
136
 
 
137
 
 
138
def copy_function(func):
 
139
    """Make a copy of a function"""
 
140
    if sys.version_info.major == 2:
 
141
        return types.FunctionType(func.func_code,
 
142
                                  func.func_globals,
 
143
                                  func.func_name,
 
144
                                  func.func_defaults,
 
145
                                  func.func_closure)
 
146
    else:
 
147
        return types.FunctionType(func.__code__,
 
148
                                  func.__globals__,
 
149
                                  func.__name__,
 
150
                                  func.__defaults__,
 
151
                                  func.__closure__)
 
152
 
 
153
 
 
154
def initlogger(debug, level=logging.WARNING):
 
155
    """init logger and add loglevel"""
 
156
 
 
157
    global syslogger
 
158
    syslogger = (logging.handlers.SysLogHandler(
 
159
        facility=logging.handlers.SysLogHandler.LOG_DAEMON,
 
160
        address="/dev/log"))
 
161
    syslogger.setFormatter(logging.Formatter
 
162
                           ('Mandos [%(process)d]: %(levelname)s:'
 
163
                            ' %(message)s'))
 
164
    logger.addHandler(syslogger)
 
165
 
 
166
    if debug:
 
167
        console = logging.StreamHandler()
 
168
        console.setFormatter(logging.Formatter('%(asctime)s %(name)s'
 
169
                                               ' [%(process)d]:'
 
170
                                               ' %(levelname)s:'
 
171
                                               ' %(message)s'))
 
172
        logger.addHandler(console)
 
173
    logger.setLevel(level)
 
174
 
 
175
 
 
176
class PGPError(Exception):
 
177
    """Exception if encryption/decryption fails"""
 
178
    pass
 
179
 
 
180
 
 
181
class PGPEngine(object):
 
182
    """A simple class for OpenPGP symmetric encryption & decryption"""
 
183
 
 
184
    def __init__(self):
 
185
        self.tempdir = tempfile.mkdtemp(prefix="mandos-")
 
186
        self.gpg = "gpg"
 
187
        try:
 
188
            output = subprocess.check_output(["gpgconf"])
 
189
            for line in output.splitlines():
 
190
                name, text, path = line.split(b":")
 
191
                if name == "gpg":
 
192
                    self.gpg = path
 
193
                    break
 
194
        except OSError as e:
 
195
            if e.errno != errno.ENOENT:
 
196
                raise
 
197
        self.gnupgargs = ['--batch',
 
198
                          '--homedir', self.tempdir,
 
199
                          '--force-mdc',
 
200
                          '--quiet']
 
201
        # Only GPG version 1 has the --no-use-agent option.
 
202
        if self.gpg == "gpg" or self.gpg.endswith("/gpg"):
 
203
            self.gnupgargs.append("--no-use-agent")
 
204
 
 
205
    def __enter__(self):
 
206
        return self
 
207
 
 
208
    def __exit__(self, exc_type, exc_value, traceback):
 
209
        self._cleanup()
 
210
        return False
 
211
 
 
212
    def __del__(self):
 
213
        self._cleanup()
 
214
 
 
215
    def _cleanup(self):
 
216
        if self.tempdir is not None:
 
217
            # Delete contents of tempdir
 
218
            for root, dirs, files in os.walk(self.tempdir,
 
219
                                             topdown=False):
 
220
                for filename in files:
 
221
                    os.remove(os.path.join(root, filename))
 
222
                for dirname in dirs:
 
223
                    os.rmdir(os.path.join(root, dirname))
 
224
            # Remove tempdir
 
225
            os.rmdir(self.tempdir)
 
226
            self.tempdir = None
 
227
 
 
228
    def password_encode(self, password):
 
229
        # Passphrase can not be empty and can not contain newlines or
 
230
        # NUL bytes.  So we prefix it and hex encode it.
 
231
        encoded = b"mandos" + binascii.hexlify(password)
 
232
        if len(encoded) > 2048:
 
233
            # GnuPG can't handle long passwords, so encode differently
 
234
            encoded = (b"mandos" + password.replace(b"\\", b"\\\\")
 
235
                       .replace(b"\n", b"\\n")
 
236
                       .replace(b"\0", b"\\x00"))
 
237
        return encoded
 
238
 
 
239
    def encrypt(self, data, password):
 
240
        passphrase = self.password_encode(password)
 
241
        with tempfile.NamedTemporaryFile(
 
242
                dir=self.tempdir) as passfile:
 
243
            passfile.write(passphrase)
 
244
            passfile.flush()
 
245
            proc = subprocess.Popen([self.gpg, '--symmetric',
 
246
                                     '--passphrase-file',
 
247
                                     passfile.name]
 
248
                                    + self.gnupgargs,
 
249
                                    stdin=subprocess.PIPE,
 
250
                                    stdout=subprocess.PIPE,
 
251
                                    stderr=subprocess.PIPE)
 
252
            ciphertext, err = proc.communicate(input=data)
 
253
        if proc.returncode != 0:
 
254
            raise PGPError(err)
 
255
        return ciphertext
 
256
 
 
257
    def decrypt(self, data, password):
 
258
        passphrase = self.password_encode(password)
 
259
        with tempfile.NamedTemporaryFile(
 
260
                dir=self.tempdir) as passfile:
 
261
            passfile.write(passphrase)
 
262
            passfile.flush()
 
263
            proc = subprocess.Popen([self.gpg, '--decrypt',
 
264
                                     '--passphrase-file',
 
265
                                     passfile.name]
 
266
                                    + self.gnupgargs,
 
267
                                    stdin=subprocess.PIPE,
 
268
                                    stdout=subprocess.PIPE,
 
269
                                    stderr=subprocess.PIPE)
 
270
            decrypted_plaintext, err = proc.communicate(input=data)
 
271
        if proc.returncode != 0:
 
272
            raise PGPError(err)
 
273
        return decrypted_plaintext
 
274
 
 
275
 
 
276
# Pretend that we have an Avahi module
 
277
class Avahi(object):
 
278
    """This isn't so much a class as it is a module-like namespace.
 
279
    It is instantiated once, and simulates having an Avahi module."""
 
280
    IF_UNSPEC = -1               # avahi-common/address.h
 
281
    PROTO_UNSPEC = -1            # avahi-common/address.h
 
282
    PROTO_INET = 0               # avahi-common/address.h
 
283
    PROTO_INET6 = 1              # avahi-common/address.h
 
284
    DBUS_NAME = "org.freedesktop.Avahi"
 
285
    DBUS_INTERFACE_ENTRY_GROUP = DBUS_NAME + ".EntryGroup"
 
286
    DBUS_INTERFACE_SERVER = DBUS_NAME + ".Server"
 
287
    DBUS_PATH_SERVER = "/"
 
288
 
 
289
    def string_array_to_txt_array(self, t):
 
290
        return dbus.Array((dbus.ByteArray(s.encode("utf-8"))
 
291
                           for s in t), signature="ay")
 
292
    ENTRY_GROUP_ESTABLISHED = 2  # avahi-common/defs.h
 
293
    ENTRY_GROUP_COLLISION = 3    # avahi-common/defs.h
 
294
    ENTRY_GROUP_FAILURE = 4      # avahi-common/defs.h
 
295
    SERVER_INVALID = 0           # avahi-common/defs.h
 
296
    SERVER_REGISTERING = 1       # avahi-common/defs.h
 
297
    SERVER_RUNNING = 2           # avahi-common/defs.h
 
298
    SERVER_COLLISION = 3         # avahi-common/defs.h
 
299
    SERVER_FAILURE = 4           # avahi-common/defs.h
 
300
avahi = Avahi()
 
301
 
102
302
 
103
303
class AvahiError(Exception):
104
304
    def __init__(self, value, *args, **kwargs):
105
305
        self.value = value
106
 
        super(AvahiError, self).__init__(value, *args, **kwargs)
107
 
    def __unicode__(self):
108
 
        return unicode(repr(self.value))
 
306
        return super(AvahiError, self).__init__(value, *args,
 
307
                                                **kwargs)
 
308
 
109
309
 
110
310
class AvahiServiceError(AvahiError):
111
311
    pass
112
312
 
 
313
 
113
314
class AvahiGroupError(AvahiError):
114
315
    pass
115
316
 
116
317
 
117
318
class AvahiService(object):
118
319
    """An Avahi (Zeroconf) service.
119
 
    
 
320
 
120
321
    Attributes:
121
322
    interface: integer; avahi.IF_UNSPEC or an interface index.
122
323
               Used to optionally bind to the specified interface.
123
324
    name: string; Example: 'Mandos'
124
325
    type: string; Example: '_mandos._tcp'.
125
 
                  See <http://www.dns-sd.org/ServiceTypes.html>
 
326
     See <https://www.iana.org/assignments/service-names-port-numbers>
126
327
    port: integer; what port to announce
127
328
    TXT: list of strings; TXT record for the service
128
329
    domain: string; Domain to publish on, default to .local if empty.
134
335
    server: D-Bus Server
135
336
    bus: dbus.SystemBus()
136
337
    """
137
 
    def __init__(self, interface = avahi.IF_UNSPEC, name = None,
138
 
                 servicetype = None, port = None, TXT = None,
139
 
                 domain = "", host = "", max_renames = 32768,
140
 
                 protocol = avahi.PROTO_UNSPEC, bus = None):
 
338
 
 
339
    def __init__(self,
 
340
                 interface=avahi.IF_UNSPEC,
 
341
                 name=None,
 
342
                 servicetype=None,
 
343
                 port=None,
 
344
                 TXT=None,
 
345
                 domain="",
 
346
                 host="",
 
347
                 max_renames=32768,
 
348
                 protocol=avahi.PROTO_UNSPEC,
 
349
                 bus=None):
141
350
        self.interface = interface
142
351
        self.name = name
143
352
        self.type = servicetype
151
360
        self.group = None       # our entry group
152
361
        self.server = None
153
362
        self.bus = bus
154
 
    def rename(self):
 
363
        self.entry_group_state_changed_match = None
 
364
 
 
365
    def rename(self, remove=True):
155
366
        """Derived from the Avahi example code"""
156
367
        if self.rename_count >= self.max_renames:
157
368
            logger.critical("No suitable Zeroconf service name found"
158
369
                            " after %i retries, exiting.",
159
370
                            self.rename_count)
160
371
            raise AvahiServiceError("Too many renames")
161
 
        self.name = unicode(self.server.GetAlternativeServiceName(self.name))
 
372
        self.name = str(
 
373
            self.server.GetAlternativeServiceName(self.name))
 
374
        self.rename_count += 1
162
375
        logger.info("Changing Zeroconf service name to %r ...",
163
376
                    self.name)
164
 
        syslogger.setFormatter(logging.Formatter
165
 
                               ('Mandos (%s) [%%(process)d]:'
166
 
                                ' %%(levelname)s: %%(message)s'
167
 
                                % self.name))
168
 
        self.remove()
 
377
        if remove:
 
378
            self.remove()
169
379
        try:
170
380
            self.add()
171
 
        except dbus.exceptions.DBusException, error:
172
 
            logger.critical("DBusException: %s", error)
173
 
            self.cleanup()
174
 
            os._exit(1)
175
 
        self.rename_count += 1
 
381
        except dbus.exceptions.DBusException as error:
 
382
            if (error.get_dbus_name()
 
383
                == "org.freedesktop.Avahi.CollisionError"):
 
384
                logger.info("Local Zeroconf service name collision.")
 
385
                return self.rename(remove=False)
 
386
            else:
 
387
                logger.critical("D-Bus Exception", exc_info=error)
 
388
                self.cleanup()
 
389
                os._exit(1)
 
390
 
176
391
    def remove(self):
177
392
        """Derived from the Avahi example code"""
 
393
        if self.entry_group_state_changed_match is not None:
 
394
            self.entry_group_state_changed_match.remove()
 
395
            self.entry_group_state_changed_match = None
178
396
        if self.group is not None:
179
397
            self.group.Reset()
 
398
 
180
399
    def add(self):
181
400
        """Derived from the Avahi example code"""
 
401
        self.remove()
182
402
        if self.group is None:
183
403
            self.group = dbus.Interface(
184
404
                self.bus.get_object(avahi.DBUS_NAME,
185
405
                                    self.server.EntryGroupNew()),
186
406
                avahi.DBUS_INTERFACE_ENTRY_GROUP)
187
 
            self.group.connect_to_signal('StateChanged',
188
 
                                         self
189
 
                                         .entry_group_state_changed)
 
407
        self.entry_group_state_changed_match = (
 
408
            self.group.connect_to_signal(
 
409
                'StateChanged', self.entry_group_state_changed))
190
410
        logger.debug("Adding Zeroconf service '%s' of type '%s' ...",
191
411
                     self.name, self.type)
192
412
        self.group.AddService(
198
418
            dbus.UInt16(self.port),
199
419
            avahi.string_array_to_txt_array(self.TXT))
200
420
        self.group.Commit()
 
421
 
201
422
    def entry_group_state_changed(self, state, error):
202
423
        """Derived from the Avahi example code"""
203
424
        logger.debug("Avahi entry group state change: %i", state)
204
 
        
 
425
 
205
426
        if state == avahi.ENTRY_GROUP_ESTABLISHED:
206
427
            logger.debug("Zeroconf service established.")
207
428
        elif state == avahi.ENTRY_GROUP_COLLISION:
209
430
            self.rename()
210
431
        elif state == avahi.ENTRY_GROUP_FAILURE:
211
432
            logger.critical("Avahi: Error in group state changed %s",
212
 
                            unicode(error))
213
 
            raise AvahiGroupError("State changed: %s"
214
 
                                  % unicode(error))
 
433
                            str(error))
 
434
            raise AvahiGroupError("State changed: {!s}".format(error))
 
435
 
215
436
    def cleanup(self):
216
437
        """Derived from the Avahi example code"""
217
438
        if self.group is not None:
218
 
            self.group.Free()
 
439
            try:
 
440
                self.group.Free()
 
441
            except (dbus.exceptions.UnknownMethodException,
 
442
                    dbus.exceptions.DBusException):
 
443
                pass
219
444
            self.group = None
220
 
    def server_state_changed(self, state):
 
445
        self.remove()
 
446
 
 
447
    def server_state_changed(self, state, error=None):
221
448
        """Derived from the Avahi example code"""
222
449
        logger.debug("Avahi server state change: %i", state)
223
 
        if state == avahi.SERVER_COLLISION:
224
 
            logger.error("Zeroconf server name collision")
225
 
            self.remove()
 
450
        bad_states = {
 
451
            avahi.SERVER_INVALID: "Zeroconf server invalid",
 
452
            avahi.SERVER_REGISTERING: None,
 
453
            avahi.SERVER_COLLISION: "Zeroconf server name collision",
 
454
            avahi.SERVER_FAILURE: "Zeroconf server failure",
 
455
        }
 
456
        if state in bad_states:
 
457
            if bad_states[state] is not None:
 
458
                if error is None:
 
459
                    logger.error(bad_states[state])
 
460
                else:
 
461
                    logger.error(bad_states[state] + ": %r", error)
 
462
            self.cleanup()
226
463
        elif state == avahi.SERVER_RUNNING:
227
 
            self.add()
 
464
            try:
 
465
                self.add()
 
466
            except dbus.exceptions.DBusException as error:
 
467
                if (error.get_dbus_name()
 
468
                    == "org.freedesktop.Avahi.CollisionError"):
 
469
                    logger.info("Local Zeroconf service name"
 
470
                                " collision.")
 
471
                    return self.rename(remove=False)
 
472
                else:
 
473
                    logger.critical("D-Bus Exception", exc_info=error)
 
474
                    self.cleanup()
 
475
                    os._exit(1)
 
476
        else:
 
477
            if error is None:
 
478
                logger.debug("Unknown state: %r", state)
 
479
            else:
 
480
                logger.debug("Unknown state: %r: %r", state, error)
 
481
 
228
482
    def activate(self):
229
483
        """Derived from the Avahi example code"""
230
484
        if self.server is None:
231
485
            self.server = dbus.Interface(
232
486
                self.bus.get_object(avahi.DBUS_NAME,
233
 
                                    avahi.DBUS_PATH_SERVER),
 
487
                                    avahi.DBUS_PATH_SERVER,
 
488
                                    follow_name_owner_changes=True),
234
489
                avahi.DBUS_INTERFACE_SERVER)
235
490
        self.server.connect_to_signal("StateChanged",
236
 
                                 self.server_state_changed)
 
491
                                      self.server_state_changed)
237
492
        self.server_state_changed(self.server.GetState())
238
493
 
239
494
 
 
495
class AvahiServiceToSyslog(AvahiService):
 
496
    def rename(self, *args, **kwargs):
 
497
        """Add the new name to the syslog messages"""
 
498
        ret = AvahiService.rename(self, *args, **kwargs)
 
499
        syslogger.setFormatter(logging.Formatter(
 
500
            'Mandos ({}) [%(process)d]: %(levelname)s: %(message)s'
 
501
            .format(self.name)))
 
502
        return ret
 
503
 
 
504
 
 
505
# Pretend that we have a GnuTLS module
 
506
class GnuTLS(object):
 
507
    """This isn't so much a class as it is a module-like namespace.
 
508
    It is instantiated once, and simulates having a GnuTLS module."""
 
509
 
 
510
    library = ctypes.util.find_library("gnutls")
 
511
    if library is None:
 
512
        library = ctypes.util.find_library("gnutls-deb0")
 
513
    _library = ctypes.cdll.LoadLibrary(library)
 
514
    del library
 
515
    _need_version = b"3.3.0"
 
516
 
 
517
    def __init__(self):
 
518
        # Need to use class name "GnuTLS" here, since this method is
 
519
        # called before the assignment to the "gnutls" global variable
 
520
        # happens.
 
521
        if GnuTLS.check_version(self._need_version) is None:
 
522
            raise GnuTLS.Error("Needs GnuTLS {} or later"
 
523
                               .format(self._need_version))
 
524
 
 
525
    # Unless otherwise indicated, the constants and types below are
 
526
    # all from the gnutls/gnutls.h C header file.
 
527
 
 
528
    # Constants
 
529
    E_SUCCESS = 0
 
530
    E_INTERRUPTED = -52
 
531
    E_AGAIN = -28
 
532
    CRT_OPENPGP = 2
 
533
    CLIENT = 2
 
534
    SHUT_RDWR = 0
 
535
    CRD_CERTIFICATE = 1
 
536
    E_NO_CERTIFICATE_FOUND = -49
 
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
        # We need to use the class name "GnuTLS" here, since this
 
566
        # exception might be raised from within GnuTLS.__init__,
 
567
        # which is called before the assignment to the "gnutls"
 
568
        # global variable has happened.
 
569
        def __init__(self, message=None, code=None, args=()):
 
570
            # Default usage is by a message string, but if a return
 
571
            # code is passed, convert it to a string with
 
572
            # gnutls.strerror()
 
573
            self.code = code
 
574
            if message is None and code is not None:
 
575
                message = GnuTLS.strerror(code)
 
576
            return super(GnuTLS.Error, self).__init__(
 
577
                message, *args)
 
578
 
 
579
    class CertificateSecurityError(Error):
 
580
        pass
 
581
 
 
582
    # Classes
 
583
    class Credentials(object):
 
584
        def __init__(self):
 
585
            self._c_object = gnutls.certificate_credentials_t()
 
586
            gnutls.certificate_allocate_credentials(
 
587
                ctypes.byref(self._c_object))
 
588
            self.type = gnutls.CRD_CERTIFICATE
 
589
 
 
590
        def __del__(self):
 
591
            gnutls.certificate_free_credentials(self._c_object)
 
592
 
 
593
    class ClientSession(object):
 
594
        def __init__(self, socket, credentials=None):
 
595
            self._c_object = gnutls.session_t()
 
596
            gnutls.init(ctypes.byref(self._c_object), gnutls.CLIENT)
 
597
            gnutls.set_default_priority(self._c_object)
 
598
            gnutls.transport_set_ptr(self._c_object, socket.fileno())
 
599
            gnutls.handshake_set_private_extensions(self._c_object,
 
600
                                                    True)
 
601
            self.socket = socket
 
602
            if credentials is None:
 
603
                credentials = gnutls.Credentials()
 
604
            gnutls.credentials_set(self._c_object, credentials.type,
 
605
                                   ctypes.cast(credentials._c_object,
 
606
                                               ctypes.c_void_p))
 
607
            self.credentials = credentials
 
608
 
 
609
        def __del__(self):
 
610
            gnutls.deinit(self._c_object)
 
611
 
 
612
        def handshake(self):
 
613
            return gnutls.handshake(self._c_object)
 
614
 
 
615
        def send(self, data):
 
616
            data = bytes(data)
 
617
            data_len = len(data)
 
618
            while data_len > 0:
 
619
                data_len -= gnutls.record_send(self._c_object,
 
620
                                               data[-data_len:],
 
621
                                               data_len)
 
622
 
 
623
        def bye(self):
 
624
            return gnutls.bye(self._c_object, gnutls.SHUT_RDWR)
 
625
 
 
626
    # Error handling functions
 
627
    def _error_code(result):
 
628
        """A function to raise exceptions on errors, suitable
 
629
        for the 'restype' attribute on ctypes functions"""
 
630
        if result >= 0:
 
631
            return result
 
632
        if result == gnutls.E_NO_CERTIFICATE_FOUND:
 
633
            raise gnutls.CertificateSecurityError(code=result)
 
634
        raise gnutls.Error(code=result)
 
635
 
 
636
    def _retry_on_error(result, func, arguments):
 
637
        """A function to retry on some errors, suitable
 
638
        for the 'errcheck' attribute on ctypes functions"""
 
639
        while result < 0:
 
640
            if result not in (gnutls.E_INTERRUPTED, gnutls.E_AGAIN):
 
641
                return _error_code(result)
 
642
            result = func(*arguments)
 
643
        return result
 
644
 
 
645
    # Unless otherwise indicated, the function declarations below are
 
646
    # all from the gnutls/gnutls.h C header file.
 
647
 
 
648
    # Functions
 
649
    priority_set_direct = _library.gnutls_priority_set_direct
 
650
    priority_set_direct.argtypes = [session_t, ctypes.c_char_p,
 
651
                                    ctypes.POINTER(ctypes.c_char_p)]
 
652
    priority_set_direct.restype = _error_code
 
653
 
 
654
    init = _library.gnutls_init
 
655
    init.argtypes = [ctypes.POINTER(session_t), ctypes.c_int]
 
656
    init.restype = _error_code
 
657
 
 
658
    set_default_priority = _library.gnutls_set_default_priority
 
659
    set_default_priority.argtypes = [session_t]
 
660
    set_default_priority.restype = _error_code
 
661
 
 
662
    record_send = _library.gnutls_record_send
 
663
    record_send.argtypes = [session_t, ctypes.c_void_p,
 
664
                            ctypes.c_size_t]
 
665
    record_send.restype = ctypes.c_ssize_t
 
666
    record_send.errcheck = _retry_on_error
 
667
 
 
668
    certificate_allocate_credentials = (
 
669
        _library.gnutls_certificate_allocate_credentials)
 
670
    certificate_allocate_credentials.argtypes = [
 
671
        ctypes.POINTER(certificate_credentials_t)]
 
672
    certificate_allocate_credentials.restype = _error_code
 
673
 
 
674
    certificate_free_credentials = (
 
675
        _library.gnutls_certificate_free_credentials)
 
676
    certificate_free_credentials.argtypes = [
 
677
        certificate_credentials_t]
 
678
    certificate_free_credentials.restype = None
 
679
 
 
680
    handshake_set_private_extensions = (
 
681
        _library.gnutls_handshake_set_private_extensions)
 
682
    handshake_set_private_extensions.argtypes = [session_t,
 
683
                                                 ctypes.c_int]
 
684
    handshake_set_private_extensions.restype = None
 
685
 
 
686
    credentials_set = _library.gnutls_credentials_set
 
687
    credentials_set.argtypes = [session_t, credentials_type_t,
 
688
                                ctypes.c_void_p]
 
689
    credentials_set.restype = _error_code
 
690
 
 
691
    strerror = _library.gnutls_strerror
 
692
    strerror.argtypes = [ctypes.c_int]
 
693
    strerror.restype = ctypes.c_char_p
 
694
 
 
695
    certificate_type_get = _library.gnutls_certificate_type_get
 
696
    certificate_type_get.argtypes = [session_t]
 
697
    certificate_type_get.restype = _error_code
 
698
 
 
699
    certificate_get_peers = _library.gnutls_certificate_get_peers
 
700
    certificate_get_peers.argtypes = [session_t,
 
701
                                      ctypes.POINTER(ctypes.c_uint)]
 
702
    certificate_get_peers.restype = ctypes.POINTER(datum_t)
 
703
 
 
704
    global_set_log_level = _library.gnutls_global_set_log_level
 
705
    global_set_log_level.argtypes = [ctypes.c_int]
 
706
    global_set_log_level.restype = None
 
707
 
 
708
    global_set_log_function = _library.gnutls_global_set_log_function
 
709
    global_set_log_function.argtypes = [log_func]
 
710
    global_set_log_function.restype = None
 
711
 
 
712
    deinit = _library.gnutls_deinit
 
713
    deinit.argtypes = [session_t]
 
714
    deinit.restype = None
 
715
 
 
716
    handshake = _library.gnutls_handshake
 
717
    handshake.argtypes = [session_t]
 
718
    handshake.restype = _error_code
 
719
    handshake.errcheck = _retry_on_error
 
720
 
 
721
    transport_set_ptr = _library.gnutls_transport_set_ptr
 
722
    transport_set_ptr.argtypes = [session_t, transport_ptr_t]
 
723
    transport_set_ptr.restype = None
 
724
 
 
725
    bye = _library.gnutls_bye
 
726
    bye.argtypes = [session_t, close_request_t]
 
727
    bye.restype = _error_code
 
728
    bye.errcheck = _retry_on_error
 
729
 
 
730
    check_version = _library.gnutls_check_version
 
731
    check_version.argtypes = [ctypes.c_char_p]
 
732
    check_version.restype = ctypes.c_char_p
 
733
 
 
734
    # All the function declarations below are from gnutls/openpgp.h
 
735
 
 
736
    openpgp_crt_init = _library.gnutls_openpgp_crt_init
 
737
    openpgp_crt_init.argtypes = [ctypes.POINTER(openpgp_crt_t)]
 
738
    openpgp_crt_init.restype = _error_code
 
739
 
 
740
    openpgp_crt_import = _library.gnutls_openpgp_crt_import
 
741
    openpgp_crt_import.argtypes = [openpgp_crt_t,
 
742
                                   ctypes.POINTER(datum_t),
 
743
                                   openpgp_crt_fmt_t]
 
744
    openpgp_crt_import.restype = _error_code
 
745
 
 
746
    openpgp_crt_verify_self = _library.gnutls_openpgp_crt_verify_self
 
747
    openpgp_crt_verify_self.argtypes = [openpgp_crt_t, ctypes.c_uint,
 
748
                                        ctypes.POINTER(ctypes.c_uint)]
 
749
    openpgp_crt_verify_self.restype = _error_code
 
750
 
 
751
    openpgp_crt_deinit = _library.gnutls_openpgp_crt_deinit
 
752
    openpgp_crt_deinit.argtypes = [openpgp_crt_t]
 
753
    openpgp_crt_deinit.restype = None
 
754
 
 
755
    openpgp_crt_get_fingerprint = (
 
756
        _library.gnutls_openpgp_crt_get_fingerprint)
 
757
    openpgp_crt_get_fingerprint.argtypes = [openpgp_crt_t,
 
758
                                            ctypes.c_void_p,
 
759
                                            ctypes.POINTER(
 
760
                                                ctypes.c_size_t)]
 
761
    openpgp_crt_get_fingerprint.restype = _error_code
 
762
 
 
763
    # Remove non-public functions
 
764
    del _error_code, _retry_on_error
 
765
# Create the global "gnutls" object, simulating a module
 
766
gnutls = GnuTLS()
 
767
 
 
768
 
 
769
def call_pipe(connection,       # : multiprocessing.Connection
 
770
              func, *args, **kwargs):
 
771
    """This function is meant to be called by multiprocessing.Process
 
772
 
 
773
    This function runs func(*args, **kwargs), and writes the resulting
 
774
    return value on the provided multiprocessing.Connection.
 
775
    """
 
776
    connection.send(func(*args, **kwargs))
 
777
    connection.close()
 
778
 
 
779
 
240
780
class Client(object):
241
781
    """A representation of a client host served by this server.
242
 
    
 
782
 
243
783
    Attributes:
244
 
    _approved:   bool(); 'None' if not yet approved/disapproved
 
784
    approved:   bool(); 'None' if not yet approved/disapproved
245
785
    approval_delay: datetime.timedelta(); Time to wait for approval
246
786
    approval_duration: datetime.timedelta(); Duration of one approval
247
787
    checker:    subprocess.Popen(); a running checker process used
248
788
                                    to see if the client lives.
249
789
                                    'None' if no process is running.
250
 
    checker_callback_tag: a gobject event source tag, or None
 
790
    checker_callback_tag: a GLib event source tag, or None
251
791
    checker_command: string; External command which is run to check
252
792
                     if client lives.  %() expansions are done at
253
793
                     runtime with vars(self) as dict, so that for
254
794
                     instance %(name)s can be used in the command.
255
 
    checker_initiator_tag: a gobject event source tag, or None
 
795
    checker_initiator_tag: a GLib event source tag, or None
256
796
    created:    datetime.datetime(); (UTC) object creation
 
797
    client_structure: Object describing what attributes a client has
 
798
                      and is used for storing the client at exit
257
799
    current_checker_command: string; current running checker_command
258
 
    disable_hook:  If set, called by disable() as disable_hook(self)
259
 
    disable_initiator_tag: a gobject event source tag, or None
 
800
    disable_initiator_tag: a GLib event source tag, or None
260
801
    enabled:    bool()
261
802
    fingerprint: string (40 or 32 hexadecimal digits); used to
262
803
                 uniquely identify the client
264
805
    interval:   datetime.timedelta(); How often to start a new checker
265
806
    last_approval_request: datetime.datetime(); (UTC) or None
266
807
    last_checked_ok: datetime.datetime(); (UTC) or None
267
 
    last_enabled: datetime.datetime(); (UTC)
 
808
    last_checker_status: integer between 0 and 255 reflecting exit
 
809
                         status of last checker. -1 reflects crashed
 
810
                         checker, -2 means no checker completed yet.
 
811
    last_checker_signal: The signal which killed the last checker, if
 
812
                         last_checker_status is -1
 
813
    last_enabled: datetime.datetime(); (UTC) or None
268
814
    name:       string; from the config file, used in log messages and
269
815
                        D-Bus identifiers
270
816
    secret:     bytestring; sent verbatim (over TLS) to client
271
817
    timeout:    datetime.timedelta(); How long from last_checked_ok
272
818
                                      until this client is disabled
 
819
    extended_timeout:   extra long timeout when secret has been sent
273
820
    runtime_expansions: Allowed attributes for runtime expansion.
 
821
    expires:    datetime.datetime(); time (UTC) when a client will be
 
822
                disabled, or None
 
823
    server_settings: The server_settings dict from main()
274
824
    """
275
 
    
 
825
 
276
826
    runtime_expansions = ("approval_delay", "approval_duration",
277
 
                          "created", "enabled", "fingerprint",
278
 
                          "host", "interval", "last_checked_ok",
 
827
                          "created", "enabled", "expires",
 
828
                          "fingerprint", "host", "interval",
 
829
                          "last_approval_request", "last_checked_ok",
279
830
                          "last_enabled", "name", "timeout")
280
 
    
 
831
    client_defaults = {
 
832
        "timeout": "PT5M",
 
833
        "extended_timeout": "PT15M",
 
834
        "interval": "PT2M",
 
835
        "checker": "fping -q -- %%(host)s",
 
836
        "host": "",
 
837
        "approval_delay": "PT0S",
 
838
        "approval_duration": "PT1S",
 
839
        "approved_by_default": "True",
 
840
        "enabled": "True",
 
841
    }
 
842
 
281
843
    @staticmethod
282
 
    def _timedelta_to_milliseconds(td):
283
 
        "Convert a datetime.timedelta() to milliseconds"
284
 
        return ((td.days * 24 * 60 * 60 * 1000)
285
 
                + (td.seconds * 1000)
286
 
                + (td.microseconds // 1000))
287
 
    
288
 
    def timeout_milliseconds(self):
289
 
        "Return the 'timeout' attribute in milliseconds"
290
 
        return self._timedelta_to_milliseconds(self.timeout)
291
 
    
292
 
    def interval_milliseconds(self):
293
 
        "Return the 'interval' attribute in milliseconds"
294
 
        return self._timedelta_to_milliseconds(self.interval)
295
 
 
296
 
    def approval_delay_milliseconds(self):
297
 
        return self._timedelta_to_milliseconds(self.approval_delay)
298
 
    
299
 
    def __init__(self, name = None, disable_hook=None, config=None):
300
 
        """Note: the 'checker' key in 'config' sets the
301
 
        'checker_command' attribute and *not* the 'checker'
302
 
        attribute."""
 
844
    def config_parser(config):
 
845
        """Construct a new dict of client settings of this form:
 
846
        { client_name: {setting_name: value, ...}, ...}
 
847
        with exceptions for any special settings as defined above.
 
848
        NOTE: Must be a pure function. Must return the same result
 
849
        value given the same arguments.
 
850
        """
 
851
        settings = {}
 
852
        for client_name in config.sections():
 
853
            section = dict(config.items(client_name))
 
854
            client = settings[client_name] = {}
 
855
 
 
856
            client["host"] = section["host"]
 
857
            # Reformat values from string types to Python types
 
858
            client["approved_by_default"] = config.getboolean(
 
859
                client_name, "approved_by_default")
 
860
            client["enabled"] = config.getboolean(client_name,
 
861
                                                  "enabled")
 
862
 
 
863
            # Uppercase and remove spaces from fingerprint for later
 
864
            # comparison purposes with return value from the
 
865
            # fingerprint() function
 
866
            client["fingerprint"] = (section["fingerprint"].upper()
 
867
                                     .replace(" ", ""))
 
868
            if "secret" in section:
 
869
                client["secret"] = codecs.decode(section["secret"]
 
870
                                                 .encode("utf-8"),
 
871
                                                 "base64")
 
872
            elif "secfile" in section:
 
873
                with open(os.path.expanduser(os.path.expandvars
 
874
                                             (section["secfile"])),
 
875
                          "rb") as secfile:
 
876
                    client["secret"] = secfile.read()
 
877
            else:
 
878
                raise TypeError("No secret or secfile for section {}"
 
879
                                .format(section))
 
880
            client["timeout"] = string_to_delta(section["timeout"])
 
881
            client["extended_timeout"] = string_to_delta(
 
882
                section["extended_timeout"])
 
883
            client["interval"] = string_to_delta(section["interval"])
 
884
            client["approval_delay"] = string_to_delta(
 
885
                section["approval_delay"])
 
886
            client["approval_duration"] = string_to_delta(
 
887
                section["approval_duration"])
 
888
            client["checker_command"] = section["checker"]
 
889
            client["last_approval_request"] = None
 
890
            client["last_checked_ok"] = None
 
891
            client["last_checker_status"] = -2
 
892
 
 
893
        return settings
 
894
 
 
895
    def __init__(self, settings, name=None, server_settings=None):
303
896
        self.name = name
304
 
        if config is None:
305
 
            config = {}
 
897
        if server_settings is None:
 
898
            server_settings = {}
 
899
        self.server_settings = server_settings
 
900
        # adding all client settings
 
901
        for setting, value in settings.items():
 
902
            setattr(self, setting, value)
 
903
 
 
904
        if self.enabled:
 
905
            if not hasattr(self, "last_enabled"):
 
906
                self.last_enabled = datetime.datetime.utcnow()
 
907
            if not hasattr(self, "expires"):
 
908
                self.expires = (datetime.datetime.utcnow()
 
909
                                + self.timeout)
 
910
        else:
 
911
            self.last_enabled = None
 
912
            self.expires = None
 
913
 
306
914
        logger.debug("Creating client %r", self.name)
307
 
        # Uppercase and remove spaces from fingerprint for later
308
 
        # comparison purposes with return value from the fingerprint()
309
 
        # function
310
 
        self.fingerprint = (config["fingerprint"].upper()
311
 
                            .replace(" ", ""))
312
915
        logger.debug("  Fingerprint: %s", self.fingerprint)
313
 
        if "secret" in config:
314
 
            self.secret = config["secret"].decode("base64")
315
 
        elif "secfile" in config:
316
 
            with open(os.path.expanduser(os.path.expandvars
317
 
                                         (config["secfile"])),
318
 
                      "rb") as secfile:
319
 
                self.secret = secfile.read()
320
 
        else:
321
 
            raise TypeError("No secret or secfile for client %s"
322
 
                            % self.name)
323
 
        self.host = config.get("host", "")
324
 
        self.created = datetime.datetime.utcnow()
325
 
        self.enabled = False
326
 
        self.last_approval_request = None
327
 
        self.last_enabled = None
328
 
        self.last_checked_ok = None
329
 
        self.timeout = string_to_delta(config["timeout"])
330
 
        self.interval = string_to_delta(config["interval"])
331
 
        self.disable_hook = disable_hook
 
916
        self.created = settings.get("created",
 
917
                                    datetime.datetime.utcnow())
 
918
 
 
919
        # attributes specific for this server instance
332
920
        self.checker = None
333
921
        self.checker_initiator_tag = None
334
922
        self.disable_initiator_tag = None
335
923
        self.checker_callback_tag = None
336
 
        self.checker_command = config["checker"]
337
924
        self.current_checker_command = None
338
 
        self.last_connect = None
339
 
        self._approved = None
340
 
        self.approved_by_default = config.get("approved_by_default",
341
 
                                              True)
 
925
        self.approved = None
342
926
        self.approvals_pending = 0
343
 
        self.approval_delay = string_to_delta(
344
 
            config["approval_delay"])
345
 
        self.approval_duration = string_to_delta(
346
 
            config["approval_duration"])
347
 
        self.changedstate = multiprocessing_manager.Condition(multiprocessing_manager.Lock())
348
 
    
 
927
        self.changedstate = multiprocessing_manager.Condition(
 
928
            multiprocessing_manager.Lock())
 
929
        self.client_structure = [attr
 
930
                                 for attr in self.__dict__.keys()
 
931
                                 if not attr.startswith("_")]
 
932
        self.client_structure.append("client_structure")
 
933
 
 
934
        for name, t in inspect.getmembers(
 
935
                type(self), lambda obj: isinstance(obj, property)):
 
936
            if not name.startswith("_"):
 
937
                self.client_structure.append(name)
 
938
 
 
939
    # Send notice to process children that client state has changed
349
940
    def send_changedstate(self):
350
 
        self.changedstate.acquire()
351
 
        self.changedstate.notify_all()
352
 
        self.changedstate.release()
353
 
        
 
941
        with self.changedstate:
 
942
            self.changedstate.notify_all()
 
943
 
354
944
    def enable(self):
355
945
        """Start this client's checker and timeout hooks"""
356
946
        if getattr(self, "enabled", False):
357
947
            # Already enabled
358
948
            return
359
 
        self.send_changedstate()
 
949
        self.expires = datetime.datetime.utcnow() + self.timeout
 
950
        self.enabled = True
360
951
        self.last_enabled = datetime.datetime.utcnow()
361
 
        # Schedule a new checker to be started an 'interval' from now,
362
 
        # and every interval from then on.
363
 
        self.checker_initiator_tag = (gobject.timeout_add
364
 
                                      (self.interval_milliseconds(),
365
 
                                       self.start_checker))
366
 
        # Schedule a disable() when 'timeout' has passed
367
 
        self.disable_initiator_tag = (gobject.timeout_add
368
 
                                   (self.timeout_milliseconds(),
369
 
                                    self.disable))
370
 
        self.enabled = True
371
 
        # Also start a new checker *right now*.
372
 
        self.start_checker()
373
 
    
 
952
        self.init_checker()
 
953
        self.send_changedstate()
 
954
 
374
955
    def disable(self, quiet=True):
375
956
        """Disable this client."""
376
957
        if not getattr(self, "enabled", False):
377
958
            return False
378
959
        if not quiet:
379
 
            self.send_changedstate()
380
 
        if not quiet:
381
960
            logger.info("Disabling client %s", self.name)
382
 
        if getattr(self, "disable_initiator_tag", False):
383
 
            gobject.source_remove(self.disable_initiator_tag)
 
961
        if getattr(self, "disable_initiator_tag", None) is not None:
 
962
            GLib.source_remove(self.disable_initiator_tag)
384
963
            self.disable_initiator_tag = None
385
 
        if getattr(self, "checker_initiator_tag", False):
386
 
            gobject.source_remove(self.checker_initiator_tag)
 
964
        self.expires = None
 
965
        if getattr(self, "checker_initiator_tag", None) is not None:
 
966
            GLib.source_remove(self.checker_initiator_tag)
387
967
            self.checker_initiator_tag = None
388
968
        self.stop_checker()
389
 
        if self.disable_hook:
390
 
            self.disable_hook(self)
391
969
        self.enabled = False
392
 
        # Do not run this again if called by a gobject.timeout_add
 
970
        if not quiet:
 
971
            self.send_changedstate()
 
972
        # Do not run this again if called by a GLib.timeout_add
393
973
        return False
394
 
    
 
974
 
395
975
    def __del__(self):
396
 
        self.disable_hook = None
397
976
        self.disable()
398
 
    
399
 
    def checker_callback(self, pid, condition, command):
 
977
 
 
978
    def init_checker(self):
 
979
        # Schedule a new checker to be started an 'interval' from now,
 
980
        # and every interval from then on.
 
981
        if self.checker_initiator_tag is not None:
 
982
            GLib.source_remove(self.checker_initiator_tag)
 
983
        self.checker_initiator_tag = GLib.timeout_add(
 
984
            int(self.interval.total_seconds() * 1000),
 
985
            self.start_checker)
 
986
        # Schedule a disable() when 'timeout' has passed
 
987
        if self.disable_initiator_tag is not None:
 
988
            GLib.source_remove(self.disable_initiator_tag)
 
989
        self.disable_initiator_tag = GLib.timeout_add(
 
990
            int(self.timeout.total_seconds() * 1000), self.disable)
 
991
        # Also start a new checker *right now*.
 
992
        self.start_checker()
 
993
 
 
994
    def checker_callback(self, source, condition, connection,
 
995
                         command):
400
996
        """The checker has completed, so take appropriate actions."""
401
997
        self.checker_callback_tag = None
402
998
        self.checker = None
403
 
        if os.WIFEXITED(condition):
404
 
            exitstatus = os.WEXITSTATUS(condition)
405
 
            if exitstatus == 0:
 
999
        # Read return code from connection (see call_pipe)
 
1000
        returncode = connection.recv()
 
1001
        connection.close()
 
1002
 
 
1003
        if returncode >= 0:
 
1004
            self.last_checker_status = returncode
 
1005
            self.last_checker_signal = None
 
1006
            if self.last_checker_status == 0:
406
1007
                logger.info("Checker for %(name)s succeeded",
407
1008
                            vars(self))
408
1009
                self.checked_ok()
409
1010
            else:
410
 
                logger.info("Checker for %(name)s failed",
411
 
                            vars(self))
 
1011
                logger.info("Checker for %(name)s failed", vars(self))
412
1012
        else:
 
1013
            self.last_checker_status = -1
 
1014
            self.last_checker_signal = -returncode
413
1015
            logger.warning("Checker for %(name)s crashed?",
414
1016
                           vars(self))
415
 
    
 
1017
        return False
 
1018
 
416
1019
    def checked_ok(self):
417
 
        """Bump up the timeout for this client.
418
 
        
419
 
        This should only be called when the client has been seen,
420
 
        alive and well.
421
 
        """
 
1020
        """Assert that the client has been seen, alive and well."""
422
1021
        self.last_checked_ok = datetime.datetime.utcnow()
423
 
        gobject.source_remove(self.disable_initiator_tag)
424
 
        self.disable_initiator_tag = (gobject.timeout_add
425
 
                                      (self.timeout_milliseconds(),
426
 
                                       self.disable))
427
 
    
 
1022
        self.last_checker_status = 0
 
1023
        self.last_checker_signal = None
 
1024
        self.bump_timeout()
 
1025
 
 
1026
    def bump_timeout(self, timeout=None):
 
1027
        """Bump up the timeout for this client."""
 
1028
        if timeout is None:
 
1029
            timeout = self.timeout
 
1030
        if self.disable_initiator_tag is not None:
 
1031
            GLib.source_remove(self.disable_initiator_tag)
 
1032
            self.disable_initiator_tag = None
 
1033
        if getattr(self, "enabled", False):
 
1034
            self.disable_initiator_tag = GLib.timeout_add(
 
1035
                int(timeout.total_seconds() * 1000), self.disable)
 
1036
            self.expires = datetime.datetime.utcnow() + timeout
 
1037
 
428
1038
    def need_approval(self):
429
1039
        self.last_approval_request = datetime.datetime.utcnow()
430
 
    
 
1040
 
431
1041
    def start_checker(self):
432
1042
        """Start a new checker subprocess if one is not running.
433
 
        
 
1043
 
434
1044
        If a checker already exists, leave it running and do
435
1045
        nothing."""
436
1046
        # The reason for not killing a running checker is that if we
437
 
        # did that, then if a checker (for some reason) started
438
 
        # running slowly and taking more than 'interval' time, the
439
 
        # client would inevitably timeout, since no checker would get
440
 
        # a chance to run to completion.  If we instead leave running
 
1047
        # did that, and if a checker (for some reason) started running
 
1048
        # slowly and taking more than 'interval' time, then the client
 
1049
        # would inevitably timeout, since no checker would get a
 
1050
        # chance to run to completion.  If we instead leave running
441
1051
        # checkers alone, the checker would have to take more time
442
1052
        # than 'timeout' for the client to be disabled, which is as it
443
1053
        # should be.
444
 
        
445
 
        # If a checker exists, make sure it is not a zombie
446
 
        try:
447
 
            pid, status = os.waitpid(self.checker.pid, os.WNOHANG)
448
 
        except (AttributeError, OSError), error:
449
 
            if (isinstance(error, OSError)
450
 
                and error.errno != errno.ECHILD):
451
 
                raise error
452
 
        else:
453
 
            if pid:
454
 
                logger.warning("Checker was a zombie")
455
 
                gobject.source_remove(self.checker_callback_tag)
456
 
                self.checker_callback(pid, status,
457
 
                                      self.current_checker_command)
 
1054
 
 
1055
        if self.checker is not None and not self.checker.is_alive():
 
1056
            logger.warning("Checker was not alive; joining")
 
1057
            self.checker.join()
 
1058
            self.checker = None
458
1059
        # Start a new checker if needed
459
1060
        if self.checker is None:
 
1061
            # Escape attributes for the shell
 
1062
            escaped_attrs = {
 
1063
                attr: re.escape(str(getattr(self, attr)))
 
1064
                for attr in self.runtime_expansions}
460
1065
            try:
461
 
                # In case checker_command has exactly one % operator
462
 
                command = self.checker_command % self.host
463
 
            except TypeError:
464
 
                # Escape attributes for the shell
465
 
                escaped_attrs = dict(
466
 
                    (attr,
467
 
                     re.escape(unicode(str(getattr(self, attr, "")),
468
 
                                       errors=
469
 
                                       'replace')))
470
 
                    for attr in
471
 
                    self.runtime_expansions)
472
 
 
473
 
                try:
474
 
                    command = self.checker_command % escaped_attrs
475
 
                except TypeError, error:
476
 
                    logger.error('Could not format string "%s":'
477
 
                                 ' %s', self.checker_command, error)
478
 
                    return True # Try again later
 
1066
                command = self.checker_command % escaped_attrs
 
1067
            except TypeError as error:
 
1068
                logger.error('Could not format string "%s"',
 
1069
                             self.checker_command,
 
1070
                             exc_info=error)
 
1071
                return True     # Try again later
479
1072
            self.current_checker_command = command
480
 
            try:
481
 
                logger.info("Starting checker %r for %s",
482
 
                            command, self.name)
483
 
                # We don't need to redirect stdout and stderr, since
484
 
                # in normal mode, that is already done by daemon(),
485
 
                # and in debug mode we don't want to.  (Stdin is
486
 
                # always replaced by /dev/null.)
487
 
                self.checker = subprocess.Popen(command,
488
 
                                                close_fds=True,
489
 
                                                shell=True, cwd="/")
490
 
                self.checker_callback_tag = (gobject.child_watch_add
491
 
                                             (self.checker.pid,
492
 
                                              self.checker_callback,
493
 
                                              data=command))
494
 
                # The checker may have completed before the gobject
495
 
                # watch was added.  Check for this.
496
 
                pid, status = os.waitpid(self.checker.pid, os.WNOHANG)
497
 
                if pid:
498
 
                    gobject.source_remove(self.checker_callback_tag)
499
 
                    self.checker_callback(pid, status, command)
500
 
            except OSError, error:
501
 
                logger.error("Failed to start subprocess: %s",
502
 
                             error)
503
 
        # Re-run this periodically if run by gobject.timeout_add
 
1073
            logger.info("Starting checker %r for %s", command,
 
1074
                        self.name)
 
1075
            # We don't need to redirect stdout and stderr, since
 
1076
            # in normal mode, that is already done by daemon(),
 
1077
            # and in debug mode we don't want to.  (Stdin is
 
1078
            # always replaced by /dev/null.)
 
1079
            # The exception is when not debugging but nevertheless
 
1080
            # running in the foreground; use the previously
 
1081
            # created wnull.
 
1082
            popen_args = {"close_fds": True,
 
1083
                          "shell": True,
 
1084
                          "cwd": "/"}
 
1085
            if (not self.server_settings["debug"]
 
1086
                and self.server_settings["foreground"]):
 
1087
                popen_args.update({"stdout": wnull,
 
1088
                                   "stderr": wnull})
 
1089
            pipe = multiprocessing.Pipe(duplex=False)
 
1090
            self.checker = multiprocessing.Process(
 
1091
                target=call_pipe,
 
1092
                args=(pipe[1], subprocess.call, command),
 
1093
                kwargs=popen_args)
 
1094
            self.checker.start()
 
1095
            self.checker_callback_tag = GLib.io_add_watch(
 
1096
                pipe[0].fileno(), GLib.IO_IN,
 
1097
                self.checker_callback, pipe[0], command)
 
1098
        # Re-run this periodically if run by GLib.timeout_add
504
1099
        return True
505
 
    
 
1100
 
506
1101
    def stop_checker(self):
507
1102
        """Force the checker process, if any, to stop."""
508
1103
        if self.checker_callback_tag:
509
 
            gobject.source_remove(self.checker_callback_tag)
 
1104
            GLib.source_remove(self.checker_callback_tag)
510
1105
            self.checker_callback_tag = None
511
1106
        if getattr(self, "checker", None) is None:
512
1107
            return
513
1108
        logger.debug("Stopping checker for %(name)s", vars(self))
514
 
        try:
515
 
            os.kill(self.checker.pid, signal.SIGTERM)
516
 
            #time.sleep(0.5)
517
 
            #if self.checker.poll() is None:
518
 
            #    os.kill(self.checker.pid, signal.SIGKILL)
519
 
        except OSError, error:
520
 
            if error.errno != errno.ESRCH: # No such process
521
 
                raise
 
1109
        self.checker.terminate()
522
1110
        self.checker = None
523
1111
 
524
 
def dbus_service_property(dbus_interface, signature="v",
525
 
                          access="readwrite", byte_arrays=False):
 
1112
 
 
1113
def dbus_service_property(dbus_interface,
 
1114
                          signature="v",
 
1115
                          access="readwrite",
 
1116
                          byte_arrays=False):
526
1117
    """Decorators for marking methods of a DBusObjectWithProperties to
527
1118
    become properties on the D-Bus.
528
 
    
 
1119
 
529
1120
    The decorated method will be called with no arguments by "Get"
530
1121
    and with one argument by "Set".
531
 
    
 
1122
 
532
1123
    The parameters, where they are supported, are the same as
533
1124
    dbus.service.method, except there is only "signature", since the
534
1125
    type from Get() and the type sent to Set() is the same.
537
1128
    # "Set" method, so we fail early here:
538
1129
    if byte_arrays and signature != "ay":
539
1130
        raise ValueError("Byte arrays not supported for non-'ay'"
540
 
                         " signature %r" % signature)
 
1131
                         " signature {!r}".format(signature))
 
1132
 
541
1133
    def decorator(func):
542
1134
        func._dbus_is_property = True
543
1135
        func._dbus_interface = dbus_interface
546
1138
        func._dbus_name = func.__name__
547
1139
        if func._dbus_name.endswith("_dbus_property"):
548
1140
            func._dbus_name = func._dbus_name[:-14]
549
 
        func._dbus_get_args_options = {'byte_arrays': byte_arrays }
550
 
        return func
 
1141
        func._dbus_get_args_options = {'byte_arrays': byte_arrays}
 
1142
        return func
 
1143
 
 
1144
    return decorator
 
1145
 
 
1146
 
 
1147
def dbus_interface_annotations(dbus_interface):
 
1148
    """Decorator for marking functions returning interface annotations
 
1149
 
 
1150
    Usage:
 
1151
 
 
1152
    @dbus_interface_annotations("org.example.Interface")
 
1153
    def _foo(self):  # Function name does not matter
 
1154
        return {"org.freedesktop.DBus.Deprecated": "true",
 
1155
                "org.freedesktop.DBus.Property.EmitsChangedSignal":
 
1156
                    "false"}
 
1157
    """
 
1158
 
 
1159
    def decorator(func):
 
1160
        func._dbus_is_interface = True
 
1161
        func._dbus_interface = dbus_interface
 
1162
        func._dbus_name = dbus_interface
 
1163
        return func
 
1164
 
 
1165
    return decorator
 
1166
 
 
1167
 
 
1168
def dbus_annotations(annotations):
 
1169
    """Decorator to annotate D-Bus methods, signals or properties
 
1170
    Usage:
 
1171
 
 
1172
    @dbus_annotations({"org.freedesktop.DBus.Deprecated": "true",
 
1173
                       "org.freedesktop.DBus.Property."
 
1174
                       "EmitsChangedSignal": "false"})
 
1175
    @dbus_service_property("org.example.Interface", signature="b",
 
1176
                           access="r")
 
1177
    def Property_dbus_property(self):
 
1178
        return dbus.Boolean(False)
 
1179
 
 
1180
    See also the DBusObjectWithAnnotations class.
 
1181
    """
 
1182
 
 
1183
    def decorator(func):
 
1184
        func._dbus_annotations = annotations
 
1185
        return func
 
1186
 
551
1187
    return decorator
552
1188
 
553
1189
 
554
1190
class DBusPropertyException(dbus.exceptions.DBusException):
555
1191
    """A base class for D-Bus property-related exceptions
556
1192
    """
557
 
    def __unicode__(self):
558
 
        return unicode(str(self))
 
1193
    pass
559
1194
 
560
1195
 
561
1196
class DBusPropertyAccessException(DBusPropertyException):
570
1205
    pass
571
1206
 
572
1207
 
573
 
class DBusObjectWithProperties(dbus.service.Object):
 
1208
class DBusObjectWithAnnotations(dbus.service.Object):
 
1209
    """A D-Bus object with annotations.
 
1210
 
 
1211
    Classes inheriting from this can use the dbus_annotations
 
1212
    decorator to add annotations to methods or signals.
 
1213
    """
 
1214
 
 
1215
    @staticmethod
 
1216
    def _is_dbus_thing(thing):
 
1217
        """Returns a function testing if an attribute is a D-Bus thing
 
1218
 
 
1219
        If called like _is_dbus_thing("method") it returns a function
 
1220
        suitable for use as predicate to inspect.getmembers().
 
1221
        """
 
1222
        return lambda obj: getattr(obj, "_dbus_is_{}".format(thing),
 
1223
                                   False)
 
1224
 
 
1225
    def _get_all_dbus_things(self, thing):
 
1226
        """Returns a generator of (name, attribute) pairs
 
1227
        """
 
1228
        return ((getattr(athing.__get__(self), "_dbus_name", name),
 
1229
                 athing.__get__(self))
 
1230
                for cls in self.__class__.__mro__
 
1231
                for name, athing in
 
1232
                inspect.getmembers(cls, self._is_dbus_thing(thing)))
 
1233
 
 
1234
    @dbus.service.method(dbus.INTROSPECTABLE_IFACE,
 
1235
                         out_signature="s",
 
1236
                         path_keyword='object_path',
 
1237
                         connection_keyword='connection')
 
1238
    def Introspect(self, object_path, connection):
 
1239
        """Overloading of standard D-Bus method.
 
1240
 
 
1241
        Inserts annotation tags on methods and signals.
 
1242
        """
 
1243
        xmlstring = dbus.service.Object.Introspect(self, object_path,
 
1244
                                                   connection)
 
1245
        try:
 
1246
            document = xml.dom.minidom.parseString(xmlstring)
 
1247
 
 
1248
            for if_tag in document.getElementsByTagName("interface"):
 
1249
                # Add annotation tags
 
1250
                for typ in ("method", "signal"):
 
1251
                    for tag in if_tag.getElementsByTagName(typ):
 
1252
                        annots = dict()
 
1253
                        for name, prop in (self.
 
1254
                                           _get_all_dbus_things(typ)):
 
1255
                            if (name == tag.getAttribute("name")
 
1256
                                and prop._dbus_interface
 
1257
                                == if_tag.getAttribute("name")):
 
1258
                                annots.update(getattr(
 
1259
                                    prop, "_dbus_annotations", {}))
 
1260
                        for name, value in annots.items():
 
1261
                            ann_tag = document.createElement(
 
1262
                                "annotation")
 
1263
                            ann_tag.setAttribute("name", name)
 
1264
                            ann_tag.setAttribute("value", value)
 
1265
                            tag.appendChild(ann_tag)
 
1266
                # Add interface annotation tags
 
1267
                for annotation, value in dict(
 
1268
                    itertools.chain.from_iterable(
 
1269
                        annotations().items()
 
1270
                        for name, annotations
 
1271
                        in self._get_all_dbus_things("interface")
 
1272
                        if name == if_tag.getAttribute("name")
 
1273
                        )).items():
 
1274
                    ann_tag = document.createElement("annotation")
 
1275
                    ann_tag.setAttribute("name", annotation)
 
1276
                    ann_tag.setAttribute("value", value)
 
1277
                    if_tag.appendChild(ann_tag)
 
1278
                # Fix argument name for the Introspect method itself
 
1279
                if (if_tag.getAttribute("name")
 
1280
                    == dbus.INTROSPECTABLE_IFACE):
 
1281
                    for cn in if_tag.getElementsByTagName("method"):
 
1282
                        if cn.getAttribute("name") == "Introspect":
 
1283
                            for arg in cn.getElementsByTagName("arg"):
 
1284
                                if (arg.getAttribute("direction")
 
1285
                                    == "out"):
 
1286
                                    arg.setAttribute("name",
 
1287
                                                     "xml_data")
 
1288
            xmlstring = document.toxml("utf-8")
 
1289
            document.unlink()
 
1290
        except (AttributeError, xml.dom.DOMException,
 
1291
                xml.parsers.expat.ExpatError) as error:
 
1292
            logger.error("Failed to override Introspection method",
 
1293
                         exc_info=error)
 
1294
        return xmlstring
 
1295
 
 
1296
 
 
1297
class DBusObjectWithProperties(DBusObjectWithAnnotations):
574
1298
    """A D-Bus object with properties.
575
1299
 
576
1300
    Classes inheriting from this can use the dbus_service_property
577
1301
    decorator to expose methods as D-Bus properties.  It exposes the
578
1302
    standard Get(), Set(), and GetAll() methods on the D-Bus.
579
1303
    """
580
 
    
581
 
    @staticmethod
582
 
    def _is_dbus_property(obj):
583
 
        return getattr(obj, "_dbus_is_property", False)
584
 
    
585
 
    def _get_all_dbus_properties(self):
586
 
        """Returns a generator of (name, attribute) pairs
587
 
        """
588
 
        return ((prop._dbus_name, prop)
589
 
                for name, prop in
590
 
                inspect.getmembers(self, self._is_dbus_property))
591
 
    
 
1304
 
592
1305
    def _get_dbus_property(self, interface_name, property_name):
593
1306
        """Returns a bound method if one exists which is a D-Bus
594
1307
        property with the specified name and interface.
595
1308
        """
596
 
        for name in (property_name,
597
 
                     property_name + "_dbus_property"):
598
 
            prop = getattr(self, name, None)
599
 
            if (prop is None
600
 
                or not self._is_dbus_property(prop)
601
 
                or prop._dbus_name != property_name
602
 
                or (interface_name and prop._dbus_interface
603
 
                    and interface_name != prop._dbus_interface)):
604
 
                continue
605
 
            return prop
 
1309
        for cls in self.__class__.__mro__:
 
1310
            for name, value in inspect.getmembers(
 
1311
                    cls, self._is_dbus_thing("property")):
 
1312
                if (value._dbus_name == property_name
 
1313
                    and value._dbus_interface == interface_name):
 
1314
                    return value.__get__(self)
 
1315
 
606
1316
        # No such property
607
 
        raise DBusPropertyNotFound(self.dbus_object_path + ":"
608
 
                                   + interface_name + "."
609
 
                                   + property_name)
610
 
    
611
 
    @dbus.service.method(dbus.PROPERTIES_IFACE, in_signature="ss",
 
1317
        raise DBusPropertyNotFound("{}:{}.{}".format(
 
1318
            self.dbus_object_path, interface_name, property_name))
 
1319
 
 
1320
    @classmethod
 
1321
    def _get_all_interface_names(cls):
 
1322
        """Get a sequence of all interfaces supported by an object"""
 
1323
        return (name for name in set(getattr(getattr(x, attr),
 
1324
                                             "_dbus_interface", None)
 
1325
                                     for x in (inspect.getmro(cls))
 
1326
                                     for attr in dir(x))
 
1327
                if name is not None)
 
1328
 
 
1329
    @dbus.service.method(dbus.PROPERTIES_IFACE,
 
1330
                         in_signature="ss",
612
1331
                         out_signature="v")
613
1332
    def Get(self, interface_name, property_name):
614
1333
        """Standard D-Bus property Get() method, see D-Bus standard.
620
1339
        if not hasattr(value, "variant_level"):
621
1340
            return value
622
1341
        return type(value)(value, variant_level=value.variant_level+1)
623
 
    
 
1342
 
624
1343
    @dbus.service.method(dbus.PROPERTIES_IFACE, in_signature="ssv")
625
1344
    def Set(self, interface_name, property_name, value):
626
1345
        """Standard D-Bus property Set() method, see D-Bus standard.
632
1351
            # The byte_arrays option is not supported yet on
633
1352
            # signatures other than "ay".
634
1353
            if prop._dbus_signature != "ay":
635
 
                raise ValueError
636
 
            value = dbus.ByteArray(''.join(unichr(byte)
637
 
                                           for byte in value))
 
1354
                raise ValueError("Byte arrays not supported for non-"
 
1355
                                 "'ay' signature {!r}"
 
1356
                                 .format(prop._dbus_signature))
 
1357
            value = dbus.ByteArray(b''.join(chr(byte)
 
1358
                                            for byte in value))
638
1359
        prop(value)
639
 
    
640
 
    @dbus.service.method(dbus.PROPERTIES_IFACE, in_signature="s",
 
1360
 
 
1361
    @dbus.service.method(dbus.PROPERTIES_IFACE,
 
1362
                         in_signature="s",
641
1363
                         out_signature="a{sv}")
642
1364
    def GetAll(self, interface_name):
643
1365
        """Standard D-Bus property GetAll() method, see D-Bus
645
1367
 
646
1368
        Note: Will not include properties with access="write".
647
1369
        """
648
 
        all = {}
649
 
        for name, prop in self._get_all_dbus_properties():
 
1370
        properties = {}
 
1371
        for name, prop in self._get_all_dbus_things("property"):
650
1372
            if (interface_name
651
1373
                and interface_name != prop._dbus_interface):
652
1374
                # Interface non-empty but did not match
656
1378
                continue
657
1379
            value = prop()
658
1380
            if not hasattr(value, "variant_level"):
659
 
                all[name] = value
 
1381
                properties[name] = value
660
1382
                continue
661
 
            all[name] = type(value)(value, variant_level=
662
 
                                    value.variant_level+1)
663
 
        return dbus.Dictionary(all, signature="sv")
664
 
    
 
1383
            properties[name] = type(value)(
 
1384
                value, variant_level=value.variant_level + 1)
 
1385
        return dbus.Dictionary(properties, signature="sv")
 
1386
 
 
1387
    @dbus.service.signal(dbus.PROPERTIES_IFACE, signature="sa{sv}as")
 
1388
    def PropertiesChanged(self, interface_name, changed_properties,
 
1389
                          invalidated_properties):
 
1390
        """Standard D-Bus PropertiesChanged() signal, see D-Bus
 
1391
        standard.
 
1392
        """
 
1393
        pass
 
1394
 
665
1395
    @dbus.service.method(dbus.INTROSPECTABLE_IFACE,
666
1396
                         out_signature="s",
667
1397
                         path_keyword='object_path',
668
1398
                         connection_keyword='connection')
669
1399
    def Introspect(self, object_path, connection):
670
 
        """Standard D-Bus method, overloaded to insert property tags.
 
1400
        """Overloading of standard D-Bus method.
 
1401
 
 
1402
        Inserts property tags and interface annotation tags.
671
1403
        """
672
 
        xmlstring = dbus.service.Object.Introspect(self, object_path,
673
 
                                                   connection)
 
1404
        xmlstring = DBusObjectWithAnnotations.Introspect(self,
 
1405
                                                         object_path,
 
1406
                                                         connection)
674
1407
        try:
675
1408
            document = xml.dom.minidom.parseString(xmlstring)
 
1409
 
676
1410
            def make_tag(document, name, prop):
677
1411
                e = document.createElement("property")
678
1412
                e.setAttribute("name", name)
679
1413
                e.setAttribute("type", prop._dbus_signature)
680
1414
                e.setAttribute("access", prop._dbus_access)
681
1415
                return e
 
1416
 
682
1417
            for if_tag in document.getElementsByTagName("interface"):
 
1418
                # Add property tags
683
1419
                for tag in (make_tag(document, name, prop)
684
1420
                            for name, prop
685
 
                            in self._get_all_dbus_properties()
 
1421
                            in self._get_all_dbus_things("property")
686
1422
                            if prop._dbus_interface
687
1423
                            == if_tag.getAttribute("name")):
688
1424
                    if_tag.appendChild(tag)
 
1425
                # Add annotation tags for properties
 
1426
                for tag in if_tag.getElementsByTagName("property"):
 
1427
                    annots = dict()
 
1428
                    for name, prop in self._get_all_dbus_things(
 
1429
                            "property"):
 
1430
                        if (name == tag.getAttribute("name")
 
1431
                            and prop._dbus_interface
 
1432
                            == if_tag.getAttribute("name")):
 
1433
                            annots.update(getattr(
 
1434
                                prop, "_dbus_annotations", {}))
 
1435
                    for name, value in annots.items():
 
1436
                        ann_tag = document.createElement(
 
1437
                            "annotation")
 
1438
                        ann_tag.setAttribute("name", name)
 
1439
                        ann_tag.setAttribute("value", value)
 
1440
                        tag.appendChild(ann_tag)
689
1441
                # Add the names to the return values for the
690
1442
                # "org.freedesktop.DBus.Properties" methods
691
1443
                if (if_tag.getAttribute("name")
704
1456
            xmlstring = document.toxml("utf-8")
705
1457
            document.unlink()
706
1458
        except (AttributeError, xml.dom.DOMException,
707
 
                xml.parsers.expat.ExpatError), error:
708
 
            logger.error("Failed to override Introspection method",
709
 
                         error)
710
 
        return xmlstring
711
 
 
712
 
 
 
1459
                xml.parsers.expat.ExpatError) as error:
 
1460
            logger.error("Failed to override Introspection method",
 
1461
                         exc_info=error)
 
1462
        return xmlstring
 
1463
 
 
1464
try:
 
1465
    dbus.OBJECT_MANAGER_IFACE
 
1466
except AttributeError:
 
1467
    dbus.OBJECT_MANAGER_IFACE = "org.freedesktop.DBus.ObjectManager"
 
1468
 
 
1469
 
 
1470
class DBusObjectWithObjectManager(DBusObjectWithAnnotations):
 
1471
    """A D-Bus object with an ObjectManager.
 
1472
 
 
1473
    Classes inheriting from this exposes the standard
 
1474
    GetManagedObjects call and the InterfacesAdded and
 
1475
    InterfacesRemoved signals on the standard
 
1476
    "org.freedesktop.DBus.ObjectManager" interface.
 
1477
 
 
1478
    Note: No signals are sent automatically; they must be sent
 
1479
    manually.
 
1480
    """
 
1481
    @dbus.service.method(dbus.OBJECT_MANAGER_IFACE,
 
1482
                         out_signature="a{oa{sa{sv}}}")
 
1483
    def GetManagedObjects(self):
 
1484
        """This function must be overridden"""
 
1485
        raise NotImplementedError()
 
1486
 
 
1487
    @dbus.service.signal(dbus.OBJECT_MANAGER_IFACE,
 
1488
                         signature="oa{sa{sv}}")
 
1489
    def InterfacesAdded(self, object_path, interfaces_and_properties):
 
1490
        pass
 
1491
 
 
1492
    @dbus.service.signal(dbus.OBJECT_MANAGER_IFACE, signature="oas")
 
1493
    def InterfacesRemoved(self, object_path, interfaces):
 
1494
        pass
 
1495
 
 
1496
    @dbus.service.method(dbus.INTROSPECTABLE_IFACE,
 
1497
                         out_signature="s",
 
1498
                         path_keyword='object_path',
 
1499
                         connection_keyword='connection')
 
1500
    def Introspect(self, object_path, connection):
 
1501
        """Overloading of standard D-Bus method.
 
1502
 
 
1503
        Override return argument name of GetManagedObjects to be
 
1504
        "objpath_interfaces_and_properties"
 
1505
        """
 
1506
        xmlstring = DBusObjectWithAnnotations.Introspect(self,
 
1507
                                                         object_path,
 
1508
                                                         connection)
 
1509
        try:
 
1510
            document = xml.dom.minidom.parseString(xmlstring)
 
1511
 
 
1512
            for if_tag in document.getElementsByTagName("interface"):
 
1513
                # Fix argument name for the GetManagedObjects method
 
1514
                if (if_tag.getAttribute("name")
 
1515
                    == dbus.OBJECT_MANAGER_IFACE):
 
1516
                    for cn in if_tag.getElementsByTagName("method"):
 
1517
                        if (cn.getAttribute("name")
 
1518
                            == "GetManagedObjects"):
 
1519
                            for arg in cn.getElementsByTagName("arg"):
 
1520
                                if (arg.getAttribute("direction")
 
1521
                                    == "out"):
 
1522
                                    arg.setAttribute(
 
1523
                                        "name",
 
1524
                                        "objpath_interfaces"
 
1525
                                        "_and_properties")
 
1526
            xmlstring = document.toxml("utf-8")
 
1527
            document.unlink()
 
1528
        except (AttributeError, xml.dom.DOMException,
 
1529
                xml.parsers.expat.ExpatError) as error:
 
1530
            logger.error("Failed to override Introspection method",
 
1531
                         exc_info=error)
 
1532
        return xmlstring
 
1533
 
 
1534
 
 
1535
def datetime_to_dbus(dt, variant_level=0):
 
1536
    """Convert a UTC datetime.datetime() to a D-Bus type."""
 
1537
    if dt is None:
 
1538
        return dbus.String("", variant_level=variant_level)
 
1539
    return dbus.String(dt.isoformat(), variant_level=variant_level)
 
1540
 
 
1541
 
 
1542
def alternate_dbus_interfaces(alt_interface_names, deprecate=True):
 
1543
    """A class decorator; applied to a subclass of
 
1544
    dbus.service.Object, it will add alternate D-Bus attributes with
 
1545
    interface names according to the "alt_interface_names" mapping.
 
1546
    Usage:
 
1547
 
 
1548
    @alternate_dbus_interfaces({"org.example.Interface":
 
1549
                                    "net.example.AlternateInterface"})
 
1550
    class SampleDBusObject(dbus.service.Object):
 
1551
        @dbus.service.method("org.example.Interface")
 
1552
        def SampleDBusMethod():
 
1553
            pass
 
1554
 
 
1555
    The above "SampleDBusMethod" on "SampleDBusObject" will be
 
1556
    reachable via two interfaces: "org.example.Interface" and
 
1557
    "net.example.AlternateInterface", the latter of which will have
 
1558
    its D-Bus annotation "org.freedesktop.DBus.Deprecated" set to
 
1559
    "true", unless "deprecate" is passed with a False value.
 
1560
 
 
1561
    This works for methods and signals, and also for D-Bus properties
 
1562
    (from DBusObjectWithProperties) and interfaces (from the
 
1563
    dbus_interface_annotations decorator).
 
1564
    """
 
1565
 
 
1566
    def wrapper(cls):
 
1567
        for orig_interface_name, alt_interface_name in (
 
1568
                alt_interface_names.items()):
 
1569
            attr = {}
 
1570
            interface_names = set()
 
1571
            # Go though all attributes of the class
 
1572
            for attrname, attribute in inspect.getmembers(cls):
 
1573
                # Ignore non-D-Bus attributes, and D-Bus attributes
 
1574
                # with the wrong interface name
 
1575
                if (not hasattr(attribute, "_dbus_interface")
 
1576
                    or not attribute._dbus_interface.startswith(
 
1577
                        orig_interface_name)):
 
1578
                    continue
 
1579
                # Create an alternate D-Bus interface name based on
 
1580
                # the current name
 
1581
                alt_interface = attribute._dbus_interface.replace(
 
1582
                    orig_interface_name, alt_interface_name)
 
1583
                interface_names.add(alt_interface)
 
1584
                # Is this a D-Bus signal?
 
1585
                if getattr(attribute, "_dbus_is_signal", False):
 
1586
                    # Extract the original non-method undecorated
 
1587
                    # function by black magic
 
1588
                    if sys.version_info.major == 2:
 
1589
                        nonmethod_func = (dict(
 
1590
                            zip(attribute.func_code.co_freevars,
 
1591
                                attribute.__closure__))
 
1592
                                          ["func"].cell_contents)
 
1593
                    else:
 
1594
                        nonmethod_func = (dict(
 
1595
                            zip(attribute.__code__.co_freevars,
 
1596
                                attribute.__closure__))
 
1597
                                          ["func"].cell_contents)
 
1598
                    # Create a new, but exactly alike, function
 
1599
                    # object, and decorate it to be a new D-Bus signal
 
1600
                    # with the alternate D-Bus interface name
 
1601
                    new_function = copy_function(nonmethod_func)
 
1602
                    new_function = (dbus.service.signal(
 
1603
                        alt_interface,
 
1604
                        attribute._dbus_signature)(new_function))
 
1605
                    # Copy annotations, if any
 
1606
                    try:
 
1607
                        new_function._dbus_annotations = dict(
 
1608
                            attribute._dbus_annotations)
 
1609
                    except AttributeError:
 
1610
                        pass
 
1611
 
 
1612
                    # Define a creator of a function to call both the
 
1613
                    # original and alternate functions, so both the
 
1614
                    # original and alternate signals gets sent when
 
1615
                    # the function is called
 
1616
                    def fixscope(func1, func2):
 
1617
                        """This function is a scope container to pass
 
1618
                        func1 and func2 to the "call_both" function
 
1619
                        outside of its arguments"""
 
1620
 
 
1621
                        @functools.wraps(func2)
 
1622
                        def call_both(*args, **kwargs):
 
1623
                            """This function will emit two D-Bus
 
1624
                            signals by calling func1 and func2"""
 
1625
                            func1(*args, **kwargs)
 
1626
                            func2(*args, **kwargs)
 
1627
                        # Make wrapper function look like a D-Bus
 
1628
                        # signal
 
1629
                        for name, attr in inspect.getmembers(func2):
 
1630
                            if name.startswith("_dbus_"):
 
1631
                                setattr(call_both, name, attr)
 
1632
 
 
1633
                        return call_both
 
1634
                    # Create the "call_both" function and add it to
 
1635
                    # the class
 
1636
                    attr[attrname] = fixscope(attribute, new_function)
 
1637
                # Is this a D-Bus method?
 
1638
                elif getattr(attribute, "_dbus_is_method", False):
 
1639
                    # Create a new, but exactly alike, function
 
1640
                    # object.  Decorate it to be a new D-Bus method
 
1641
                    # with the alternate D-Bus interface name.  Add it
 
1642
                    # to the class.
 
1643
                    attr[attrname] = (
 
1644
                        dbus.service.method(
 
1645
                            alt_interface,
 
1646
                            attribute._dbus_in_signature,
 
1647
                            attribute._dbus_out_signature)
 
1648
                        (copy_function(attribute)))
 
1649
                    # Copy annotations, if any
 
1650
                    try:
 
1651
                        attr[attrname]._dbus_annotations = dict(
 
1652
                            attribute._dbus_annotations)
 
1653
                    except AttributeError:
 
1654
                        pass
 
1655
                # Is this a D-Bus property?
 
1656
                elif getattr(attribute, "_dbus_is_property", False):
 
1657
                    # Create a new, but exactly alike, function
 
1658
                    # object, and decorate it to be a new D-Bus
 
1659
                    # property with the alternate D-Bus interface
 
1660
                    # name.  Add it to the class.
 
1661
                    attr[attrname] = (dbus_service_property(
 
1662
                        alt_interface, attribute._dbus_signature,
 
1663
                        attribute._dbus_access,
 
1664
                        attribute._dbus_get_args_options
 
1665
                        ["byte_arrays"])
 
1666
                                      (copy_function(attribute)))
 
1667
                    # Copy annotations, if any
 
1668
                    try:
 
1669
                        attr[attrname]._dbus_annotations = dict(
 
1670
                            attribute._dbus_annotations)
 
1671
                    except AttributeError:
 
1672
                        pass
 
1673
                # Is this a D-Bus interface?
 
1674
                elif getattr(attribute, "_dbus_is_interface", False):
 
1675
                    # Create a new, but exactly alike, function
 
1676
                    # object.  Decorate it to be a new D-Bus interface
 
1677
                    # with the alternate D-Bus interface name.  Add it
 
1678
                    # to the class.
 
1679
                    attr[attrname] = (
 
1680
                        dbus_interface_annotations(alt_interface)
 
1681
                        (copy_function(attribute)))
 
1682
            if deprecate:
 
1683
                # Deprecate all alternate interfaces
 
1684
                iname = "_AlternateDBusNames_interface_annotation{}"
 
1685
                for interface_name in interface_names:
 
1686
 
 
1687
                    @dbus_interface_annotations(interface_name)
 
1688
                    def func(self):
 
1689
                        return {"org.freedesktop.DBus.Deprecated":
 
1690
                                "true"}
 
1691
                    # Find an unused name
 
1692
                    for aname in (iname.format(i)
 
1693
                                  for i in itertools.count()):
 
1694
                        if aname not in attr:
 
1695
                            attr[aname] = func
 
1696
                            break
 
1697
            if interface_names:
 
1698
                # Replace the class with a new subclass of it with
 
1699
                # methods, signals, etc. as created above.
 
1700
                if sys.version_info.major == 2:
 
1701
                    cls = type(b"{}Alternate".format(cls.__name__),
 
1702
                               (cls, ), attr)
 
1703
                else:
 
1704
                    cls = type("{}Alternate".format(cls.__name__),
 
1705
                               (cls, ), attr)
 
1706
        return cls
 
1707
 
 
1708
    return wrapper
 
1709
 
 
1710
 
 
1711
@alternate_dbus_interfaces({"se.recompile.Mandos":
 
1712
                            "se.bsnet.fukt.Mandos"})
713
1713
class ClientDBus(Client, DBusObjectWithProperties):
714
1714
    """A Client class using D-Bus
715
 
    
 
1715
 
716
1716
    Attributes:
717
1717
    dbus_object_path: dbus.ObjectPath
718
1718
    bus: dbus.SystemBus()
719
1719
    """
720
 
    
 
1720
 
721
1721
    runtime_expansions = (Client.runtime_expansions
722
 
                          + ("dbus_object_path",))
723
 
    
 
1722
                          + ("dbus_object_path", ))
 
1723
 
 
1724
    _interface = "se.recompile.Mandos.Client"
 
1725
 
724
1726
    # dbus.service.Object doesn't use super(), so we can't either.
725
 
    
726
 
    def __init__(self, bus = None, *args, **kwargs):
727
 
        self._approvals_pending = 0
 
1727
 
 
1728
    def __init__(self, bus=None, *args, **kwargs):
728
1729
        self.bus = bus
729
1730
        Client.__init__(self, *args, **kwargs)
730
1731
        # Only now, when this client is initialized, can it show up on
731
1732
        # the D-Bus
732
 
        client_object_name = unicode(self.name).translate(
 
1733
        client_object_name = str(self.name).translate(
733
1734
            {ord("."): ord("_"),
734
1735
             ord("-"): ord("_")})
735
 
        self.dbus_object_path = (dbus.ObjectPath
736
 
                                 ("/clients/" + client_object_name))
 
1736
        self.dbus_object_path = dbus.ObjectPath(
 
1737
            "/clients/" + client_object_name)
737
1738
        DBusObjectWithProperties.__init__(self, self.bus,
738
1739
                                          self.dbus_object_path)
739
 
        
740
 
    def _get_approvals_pending(self):
741
 
        return self._approvals_pending
742
 
    def _set_approvals_pending(self, value):
743
 
        old_value = self._approvals_pending
744
 
        self._approvals_pending = value
745
 
        bval = bool(value)
746
 
        if (hasattr(self, "dbus_object_path")
747
 
            and bval is not bool(old_value)):
748
 
            dbus_bool = dbus.Boolean(bval, variant_level=1)
749
 
            self.PropertyChanged(dbus.String("ApprovalPending"),
750
 
                                 dbus_bool)
751
 
 
752
 
    approvals_pending = property(_get_approvals_pending,
753
 
                                 _set_approvals_pending)
754
 
    del _get_approvals_pending, _set_approvals_pending
755
 
    
756
 
    @staticmethod
757
 
    def _datetime_to_dbus(dt, variant_level=0):
758
 
        """Convert a UTC datetime.datetime() to a D-Bus type."""
759
 
        return dbus.String(dt.isoformat(),
760
 
                           variant_level=variant_level)
761
 
    
762
 
    def enable(self):
763
 
        oldstate = getattr(self, "enabled", False)
764
 
        r = Client.enable(self)
765
 
        if oldstate != self.enabled:
766
 
            # Emit D-Bus signals
767
 
            self.PropertyChanged(dbus.String("Enabled"),
768
 
                                 dbus.Boolean(True, variant_level=1))
769
 
            self.PropertyChanged(
770
 
                dbus.String("LastEnabled"),
771
 
                self._datetime_to_dbus(self.last_enabled,
772
 
                                       variant_level=1))
773
 
        return r
774
 
    
775
 
    def disable(self, quiet = False):
776
 
        oldstate = getattr(self, "enabled", False)
777
 
        r = Client.disable(self, quiet=quiet)
778
 
        if not quiet and oldstate != self.enabled:
779
 
            # Emit D-Bus signal
780
 
            self.PropertyChanged(dbus.String("Enabled"),
781
 
                                 dbus.Boolean(False, variant_level=1))
782
 
        return r
783
 
    
 
1740
 
 
1741
    def notifychangeproperty(transform_func, dbus_name,
 
1742
                             type_func=lambda x: x,
 
1743
                             variant_level=1,
 
1744
                             invalidate_only=False,
 
1745
                             _interface=_interface):
 
1746
        """ Modify a variable so that it's a property which announces
 
1747
        its changes to DBus.
 
1748
 
 
1749
        transform_fun: Function that takes a value and a variant_level
 
1750
                       and transforms it to a D-Bus type.
 
1751
        dbus_name: D-Bus name of the variable
 
1752
        type_func: Function that transform the value before sending it
 
1753
                   to the D-Bus.  Default: no transform
 
1754
        variant_level: D-Bus variant level.  Default: 1
 
1755
        """
 
1756
        attrname = "_{}".format(dbus_name)
 
1757
 
 
1758
        def setter(self, value):
 
1759
            if hasattr(self, "dbus_object_path"):
 
1760
                if (not hasattr(self, attrname) or
 
1761
                    type_func(getattr(self, attrname, None))
 
1762
                    != type_func(value)):
 
1763
                    if invalidate_only:
 
1764
                        self.PropertiesChanged(
 
1765
                            _interface, dbus.Dictionary(),
 
1766
                            dbus.Array((dbus_name, )))
 
1767
                    else:
 
1768
                        dbus_value = transform_func(
 
1769
                            type_func(value),
 
1770
                            variant_level=variant_level)
 
1771
                        self.PropertyChanged(dbus.String(dbus_name),
 
1772
                                             dbus_value)
 
1773
                        self.PropertiesChanged(
 
1774
                            _interface,
 
1775
                            dbus.Dictionary({dbus.String(dbus_name):
 
1776
                                             dbus_value}),
 
1777
                            dbus.Array())
 
1778
            setattr(self, attrname, value)
 
1779
 
 
1780
        return property(lambda self: getattr(self, attrname), setter)
 
1781
 
 
1782
    expires = notifychangeproperty(datetime_to_dbus, "Expires")
 
1783
    approvals_pending = notifychangeproperty(dbus.Boolean,
 
1784
                                             "ApprovalPending",
 
1785
                                             type_func=bool)
 
1786
    enabled = notifychangeproperty(dbus.Boolean, "Enabled")
 
1787
    last_enabled = notifychangeproperty(datetime_to_dbus,
 
1788
                                        "LastEnabled")
 
1789
    checker = notifychangeproperty(
 
1790
        dbus.Boolean, "CheckerRunning",
 
1791
        type_func=lambda checker: checker is not None)
 
1792
    last_checked_ok = notifychangeproperty(datetime_to_dbus,
 
1793
                                           "LastCheckedOK")
 
1794
    last_checker_status = notifychangeproperty(dbus.Int16,
 
1795
                                               "LastCheckerStatus")
 
1796
    last_approval_request = notifychangeproperty(
 
1797
        datetime_to_dbus, "LastApprovalRequest")
 
1798
    approved_by_default = notifychangeproperty(dbus.Boolean,
 
1799
                                               "ApprovedByDefault")
 
1800
    approval_delay = notifychangeproperty(
 
1801
        dbus.UInt64, "ApprovalDelay",
 
1802
        type_func=lambda td: td.total_seconds() * 1000)
 
1803
    approval_duration = notifychangeproperty(
 
1804
        dbus.UInt64, "ApprovalDuration",
 
1805
        type_func=lambda td: td.total_seconds() * 1000)
 
1806
    host = notifychangeproperty(dbus.String, "Host")
 
1807
    timeout = notifychangeproperty(
 
1808
        dbus.UInt64, "Timeout",
 
1809
        type_func=lambda td: td.total_seconds() * 1000)
 
1810
    extended_timeout = notifychangeproperty(
 
1811
        dbus.UInt64, "ExtendedTimeout",
 
1812
        type_func=lambda td: td.total_seconds() * 1000)
 
1813
    interval = notifychangeproperty(
 
1814
        dbus.UInt64, "Interval",
 
1815
        type_func=lambda td: td.total_seconds() * 1000)
 
1816
    checker_command = notifychangeproperty(dbus.String, "Checker")
 
1817
    secret = notifychangeproperty(dbus.ByteArray, "Secret",
 
1818
                                  invalidate_only=True)
 
1819
 
 
1820
    del notifychangeproperty
 
1821
 
784
1822
    def __del__(self, *args, **kwargs):
785
1823
        try:
786
1824
            self.remove_from_connection()
789
1827
        if hasattr(DBusObjectWithProperties, "__del__"):
790
1828
            DBusObjectWithProperties.__del__(self, *args, **kwargs)
791
1829
        Client.__del__(self, *args, **kwargs)
792
 
    
793
 
    def checker_callback(self, pid, condition, command,
794
 
                         *args, **kwargs):
795
 
        self.checker_callback_tag = None
796
 
        self.checker = None
797
 
        # Emit D-Bus signal
798
 
        self.PropertyChanged(dbus.String("CheckerRunning"),
799
 
                             dbus.Boolean(False, variant_level=1))
800
 
        if os.WIFEXITED(condition):
801
 
            exitstatus = os.WEXITSTATUS(condition)
 
1830
 
 
1831
    def checker_callback(self, source, condition,
 
1832
                         connection, command, *args, **kwargs):
 
1833
        ret = Client.checker_callback(self, source, condition,
 
1834
                                      connection, command, *args,
 
1835
                                      **kwargs)
 
1836
        exitstatus = self.last_checker_status
 
1837
        if exitstatus >= 0:
802
1838
            # Emit D-Bus signal
803
1839
            self.CheckerCompleted(dbus.Int16(exitstatus),
804
 
                                  dbus.Int64(condition),
 
1840
                                  # This is specific to GNU libC
 
1841
                                  dbus.Int64(exitstatus << 8),
805
1842
                                  dbus.String(command))
806
1843
        else:
807
1844
            # Emit D-Bus signal
808
1845
            self.CheckerCompleted(dbus.Int16(-1),
809
 
                                  dbus.Int64(condition),
 
1846
                                  dbus.Int64(
 
1847
                                      # This is specific to GNU libC
 
1848
                                      (exitstatus << 8)
 
1849
                                      | self.last_checker_signal),
810
1850
                                  dbus.String(command))
811
 
        
812
 
        return Client.checker_callback(self, pid, condition, command,
813
 
                                       *args, **kwargs)
814
 
    
815
 
    def checked_ok(self, *args, **kwargs):
816
 
        r = Client.checked_ok(self, *args, **kwargs)
817
 
        # Emit D-Bus signal
818
 
        self.PropertyChanged(
819
 
            dbus.String("LastCheckedOK"),
820
 
            (self._datetime_to_dbus(self.last_checked_ok,
821
 
                                    variant_level=1)))
822
 
        return r
823
 
    
824
 
    def need_approval(self, *args, **kwargs):
825
 
        r = Client.need_approval(self, *args, **kwargs)
826
 
        # Emit D-Bus signal
827
 
        self.PropertyChanged(
828
 
            dbus.String("LastApprovalRequest"),
829
 
            (self._datetime_to_dbus(self.last_approval_request,
830
 
                                    variant_level=1)))
831
 
        return r
832
 
    
 
1851
        return ret
 
1852
 
833
1853
    def start_checker(self, *args, **kwargs):
834
 
        old_checker = self.checker
835
 
        if self.checker is not None:
836
 
            old_checker_pid = self.checker.pid
837
 
        else:
838
 
            old_checker_pid = None
 
1854
        old_checker_pid = getattr(self.checker, "pid", None)
839
1855
        r = Client.start_checker(self, *args, **kwargs)
840
1856
        # Only if new checker process was started
841
1857
        if (self.checker is not None
842
1858
            and old_checker_pid != self.checker.pid):
843
1859
            # Emit D-Bus signal
844
1860
            self.CheckerStarted(self.current_checker_command)
845
 
            self.PropertyChanged(
846
 
                dbus.String("CheckerRunning"),
847
 
                dbus.Boolean(True, variant_level=1))
848
 
        return r
849
 
    
850
 
    def stop_checker(self, *args, **kwargs):
851
 
        old_checker = getattr(self, "checker", None)
852
 
        r = Client.stop_checker(self, *args, **kwargs)
853
 
        if (old_checker is not None
854
 
            and getattr(self, "checker", None) is None):
855
 
            self.PropertyChanged(dbus.String("CheckerRunning"),
856
 
                                 dbus.Boolean(False, variant_level=1))
857
1861
        return r
858
1862
 
859
1863
    def _reset_approved(self):
860
 
        self._approved = None
 
1864
        self.approved = None
861
1865
        return False
862
 
    
 
1866
 
863
1867
    def approve(self, value=True):
 
1868
        self.approved = value
 
1869
        GLib.timeout_add(int(self.approval_duration.total_seconds()
 
1870
                             * 1000), self._reset_approved)
864
1871
        self.send_changedstate()
865
 
        self._approved = value
866
 
        gobject.timeout_add(self._timedelta_to_milliseconds
867
 
                            (self.approval_duration),
868
 
                            self._reset_approved)
869
 
    
870
 
    
871
 
    ## D-Bus methods, signals & properties
872
 
    _interface = "se.bsnet.fukt.Mandos.Client"
873
 
    
874
 
    ## Signals
875
 
    
 
1872
 
 
1873
    #  D-Bus methods, signals & properties
 
1874
 
 
1875
    #  Interfaces
 
1876
 
 
1877
    #  Signals
 
1878
 
876
1879
    # CheckerCompleted - signal
877
1880
    @dbus.service.signal(_interface, signature="nxs")
878
1881
    def CheckerCompleted(self, exitcode, waitstatus, command):
879
1882
        "D-Bus signal"
880
1883
        pass
881
 
    
 
1884
 
882
1885
    # CheckerStarted - signal
883
1886
    @dbus.service.signal(_interface, signature="s")
884
1887
    def CheckerStarted(self, command):
885
1888
        "D-Bus signal"
886
1889
        pass
887
 
    
 
1890
 
888
1891
    # PropertyChanged - signal
 
1892
    @dbus_annotations({"org.freedesktop.DBus.Deprecated": "true"})
889
1893
    @dbus.service.signal(_interface, signature="sv")
890
1894
    def PropertyChanged(self, property, value):
891
1895
        "D-Bus signal"
892
1896
        pass
893
 
    
 
1897
 
894
1898
    # GotSecret - signal
895
1899
    @dbus.service.signal(_interface)
896
1900
    def GotSecret(self):
899
1903
        server to mandos-client
900
1904
        """
901
1905
        pass
902
 
    
 
1906
 
903
1907
    # Rejected - signal
904
1908
    @dbus.service.signal(_interface, signature="s")
905
1909
    def Rejected(self, reason):
906
1910
        "D-Bus signal"
907
1911
        pass
908
 
    
 
1912
 
909
1913
    # NeedApproval - signal
910
1914
    @dbus.service.signal(_interface, signature="tb")
911
1915
    def NeedApproval(self, timeout, default):
912
1916
        "D-Bus signal"
913
1917
        return self.need_approval()
914
 
    
915
 
    ## Methods
916
 
    
 
1918
 
 
1919
    #  Methods
 
1920
 
917
1921
    # Approve - method
918
1922
    @dbus.service.method(_interface, in_signature="b")
919
1923
    def Approve(self, value):
920
1924
        self.approve(value)
921
 
    
 
1925
 
922
1926
    # CheckedOK - method
923
1927
    @dbus.service.method(_interface)
924
1928
    def CheckedOK(self):
925
 
        return self.checked_ok()
926
 
    
 
1929
        self.checked_ok()
 
1930
 
927
1931
    # Enable - method
 
1932
    @dbus_annotations({"org.freedesktop.DBus.Deprecated": "true"})
928
1933
    @dbus.service.method(_interface)
929
1934
    def Enable(self):
930
1935
        "D-Bus method"
931
1936
        self.enable()
932
 
    
 
1937
 
933
1938
    # StartChecker - method
 
1939
    @dbus_annotations({"org.freedesktop.DBus.Deprecated": "true"})
934
1940
    @dbus.service.method(_interface)
935
1941
    def StartChecker(self):
936
1942
        "D-Bus method"
937
1943
        self.start_checker()
938
 
    
 
1944
 
939
1945
    # Disable - method
 
1946
    @dbus_annotations({"org.freedesktop.DBus.Deprecated": "true"})
940
1947
    @dbus.service.method(_interface)
941
1948
    def Disable(self):
942
1949
        "D-Bus method"
943
1950
        self.disable()
944
 
    
 
1951
 
945
1952
    # StopChecker - method
 
1953
    @dbus_annotations({"org.freedesktop.DBus.Deprecated": "true"})
946
1954
    @dbus.service.method(_interface)
947
1955
    def StopChecker(self):
948
1956
        self.stop_checker()
949
 
    
950
 
    ## Properties
951
 
    
 
1957
 
 
1958
    #  Properties
 
1959
 
952
1960
    # ApprovalPending - property
953
1961
    @dbus_service_property(_interface, signature="b", access="read")
954
1962
    def ApprovalPending_dbus_property(self):
955
1963
        return dbus.Boolean(bool(self.approvals_pending))
956
 
    
 
1964
 
957
1965
    # ApprovedByDefault - property
958
 
    @dbus_service_property(_interface, signature="b",
 
1966
    @dbus_service_property(_interface,
 
1967
                           signature="b",
959
1968
                           access="readwrite")
960
1969
    def ApprovedByDefault_dbus_property(self, value=None):
961
1970
        if value is None:       # get
962
1971
            return dbus.Boolean(self.approved_by_default)
963
1972
        self.approved_by_default = bool(value)
964
 
        # Emit D-Bus signal
965
 
        self.PropertyChanged(dbus.String("ApprovedByDefault"),
966
 
                             dbus.Boolean(value, variant_level=1))
967
 
    
 
1973
 
968
1974
    # ApprovalDelay - property
969
 
    @dbus_service_property(_interface, signature="t",
 
1975
    @dbus_service_property(_interface,
 
1976
                           signature="t",
970
1977
                           access="readwrite")
971
1978
    def ApprovalDelay_dbus_property(self, value=None):
972
1979
        if value is None:       # get
973
 
            return dbus.UInt64(self.approval_delay_milliseconds())
 
1980
            return dbus.UInt64(self.approval_delay.total_seconds()
 
1981
                               * 1000)
974
1982
        self.approval_delay = datetime.timedelta(0, 0, 0, value)
975
 
        # Emit D-Bus signal
976
 
        self.PropertyChanged(dbus.String("ApprovalDelay"),
977
 
                             dbus.UInt64(value, variant_level=1))
978
 
    
 
1983
 
979
1984
    # ApprovalDuration - property
980
 
    @dbus_service_property(_interface, signature="t",
 
1985
    @dbus_service_property(_interface,
 
1986
                           signature="t",
981
1987
                           access="readwrite")
982
1988
    def ApprovalDuration_dbus_property(self, value=None):
983
1989
        if value is None:       # get
984
 
            return dbus.UInt64(self._timedelta_to_milliseconds(
985
 
                    self.approval_duration))
 
1990
            return dbus.UInt64(self.approval_duration.total_seconds()
 
1991
                               * 1000)
986
1992
        self.approval_duration = datetime.timedelta(0, 0, 0, value)
987
 
        # Emit D-Bus signal
988
 
        self.PropertyChanged(dbus.String("ApprovalDuration"),
989
 
                             dbus.UInt64(value, variant_level=1))
990
 
    
 
1993
 
991
1994
    # Name - property
 
1995
    @dbus_annotations(
 
1996
        {"org.freedesktop.DBus.Property.EmitsChangedSignal": "const"})
992
1997
    @dbus_service_property(_interface, signature="s", access="read")
993
1998
    def Name_dbus_property(self):
994
1999
        return dbus.String(self.name)
995
 
    
 
2000
 
996
2001
    # Fingerprint - property
 
2002
    @dbus_annotations(
 
2003
        {"org.freedesktop.DBus.Property.EmitsChangedSignal": "const"})
997
2004
    @dbus_service_property(_interface, signature="s", access="read")
998
2005
    def Fingerprint_dbus_property(self):
999
2006
        return dbus.String(self.fingerprint)
1000
 
    
 
2007
 
1001
2008
    # Host - property
1002
 
    @dbus_service_property(_interface, signature="s",
 
2009
    @dbus_service_property(_interface,
 
2010
                           signature="s",
1003
2011
                           access="readwrite")
1004
2012
    def Host_dbus_property(self, value=None):
1005
2013
        if value is None:       # get
1006
2014
            return dbus.String(self.host)
1007
 
        self.host = value
1008
 
        # Emit D-Bus signal
1009
 
        self.PropertyChanged(dbus.String("Host"),
1010
 
                             dbus.String(value, variant_level=1))
1011
 
    
 
2015
        self.host = str(value)
 
2016
 
1012
2017
    # Created - property
 
2018
    @dbus_annotations(
 
2019
        {"org.freedesktop.DBus.Property.EmitsChangedSignal": "const"})
1013
2020
    @dbus_service_property(_interface, signature="s", access="read")
1014
2021
    def Created_dbus_property(self):
1015
 
        return dbus.String(self._datetime_to_dbus(self.created))
1016
 
    
 
2022
        return datetime_to_dbus(self.created)
 
2023
 
1017
2024
    # LastEnabled - property
1018
2025
    @dbus_service_property(_interface, signature="s", access="read")
1019
2026
    def LastEnabled_dbus_property(self):
1020
 
        if self.last_enabled is None:
1021
 
            return dbus.String("")
1022
 
        return dbus.String(self._datetime_to_dbus(self.last_enabled))
1023
 
    
 
2027
        return datetime_to_dbus(self.last_enabled)
 
2028
 
1024
2029
    # Enabled - property
1025
 
    @dbus_service_property(_interface, signature="b",
 
2030
    @dbus_service_property(_interface,
 
2031
                           signature="b",
1026
2032
                           access="readwrite")
1027
2033
    def Enabled_dbus_property(self, value=None):
1028
2034
        if value is None:       # get
1031
2037
            self.enable()
1032
2038
        else:
1033
2039
            self.disable()
1034
 
    
 
2040
 
1035
2041
    # LastCheckedOK - property
1036
 
    @dbus_service_property(_interface, signature="s",
 
2042
    @dbus_service_property(_interface,
 
2043
                           signature="s",
1037
2044
                           access="readwrite")
1038
2045
    def LastCheckedOK_dbus_property(self, value=None):
1039
2046
        if value is not None:
1040
2047
            self.checked_ok()
1041
2048
            return
1042
 
        if self.last_checked_ok is None:
1043
 
            return dbus.String("")
1044
 
        return dbus.String(self._datetime_to_dbus(self
1045
 
                                                  .last_checked_ok))
1046
 
    
 
2049
        return datetime_to_dbus(self.last_checked_ok)
 
2050
 
 
2051
    # LastCheckerStatus - property
 
2052
    @dbus_service_property(_interface, signature="n", access="read")
 
2053
    def LastCheckerStatus_dbus_property(self):
 
2054
        return dbus.Int16(self.last_checker_status)
 
2055
 
 
2056
    # Expires - property
 
2057
    @dbus_service_property(_interface, signature="s", access="read")
 
2058
    def Expires_dbus_property(self):
 
2059
        return datetime_to_dbus(self.expires)
 
2060
 
1047
2061
    # LastApprovalRequest - property
1048
2062
    @dbus_service_property(_interface, signature="s", access="read")
1049
2063
    def LastApprovalRequest_dbus_property(self):
1050
 
        if self.last_approval_request is None:
1051
 
            return dbus.String("")
1052
 
        return dbus.String(self.
1053
 
                           _datetime_to_dbus(self
1054
 
                                             .last_approval_request))
1055
 
    
 
2064
        return datetime_to_dbus(self.last_approval_request)
 
2065
 
1056
2066
    # Timeout - property
1057
 
    @dbus_service_property(_interface, signature="t",
 
2067
    @dbus_service_property(_interface,
 
2068
                           signature="t",
1058
2069
                           access="readwrite")
1059
2070
    def Timeout_dbus_property(self, value=None):
1060
2071
        if value is None:       # get
1061
 
            return dbus.UInt64(self.timeout_milliseconds())
 
2072
            return dbus.UInt64(self.timeout.total_seconds() * 1000)
 
2073
        old_timeout = self.timeout
1062
2074
        self.timeout = datetime.timedelta(0, 0, 0, value)
1063
 
        # Emit D-Bus signal
1064
 
        self.PropertyChanged(dbus.String("Timeout"),
1065
 
                             dbus.UInt64(value, variant_level=1))
1066
 
        if getattr(self, "disable_initiator_tag", None) is None:
1067
 
            return
1068
 
        # Reschedule timeout
1069
 
        gobject.source_remove(self.disable_initiator_tag)
1070
 
        self.disable_initiator_tag = None
1071
 
        time_to_die = (self.
1072
 
                       _timedelta_to_milliseconds((self
1073
 
                                                   .last_checked_ok
1074
 
                                                   + self.timeout)
1075
 
                                                  - datetime.datetime
1076
 
                                                  .utcnow()))
1077
 
        if time_to_die <= 0:
1078
 
            # The timeout has passed
1079
 
            self.disable()
1080
 
        else:
1081
 
            self.disable_initiator_tag = (gobject.timeout_add
1082
 
                                          (time_to_die, self.disable))
1083
 
    
 
2075
        # Reschedule disabling
 
2076
        if self.enabled:
 
2077
            now = datetime.datetime.utcnow()
 
2078
            self.expires += self.timeout - old_timeout
 
2079
            if self.expires <= now:
 
2080
                # The timeout has passed
 
2081
                self.disable()
 
2082
            else:
 
2083
                if (getattr(self, "disable_initiator_tag", None)
 
2084
                    is None):
 
2085
                    return
 
2086
                GLib.source_remove(self.disable_initiator_tag)
 
2087
                self.disable_initiator_tag = GLib.timeout_add(
 
2088
                    int((self.expires - now).total_seconds() * 1000),
 
2089
                    self.disable)
 
2090
 
 
2091
    # ExtendedTimeout - property
 
2092
    @dbus_service_property(_interface,
 
2093
                           signature="t",
 
2094
                           access="readwrite")
 
2095
    def ExtendedTimeout_dbus_property(self, value=None):
 
2096
        if value is None:       # get
 
2097
            return dbus.UInt64(self.extended_timeout.total_seconds()
 
2098
                               * 1000)
 
2099
        self.extended_timeout = datetime.timedelta(0, 0, 0, value)
 
2100
 
1084
2101
    # Interval - property
1085
 
    @dbus_service_property(_interface, signature="t",
 
2102
    @dbus_service_property(_interface,
 
2103
                           signature="t",
1086
2104
                           access="readwrite")
1087
2105
    def Interval_dbus_property(self, value=None):
1088
2106
        if value is None:       # get
1089
 
            return dbus.UInt64(self.interval_milliseconds())
 
2107
            return dbus.UInt64(self.interval.total_seconds() * 1000)
1090
2108
        self.interval = datetime.timedelta(0, 0, 0, value)
1091
 
        # Emit D-Bus signal
1092
 
        self.PropertyChanged(dbus.String("Interval"),
1093
 
                             dbus.UInt64(value, variant_level=1))
1094
2109
        if getattr(self, "checker_initiator_tag", None) is None:
1095
2110
            return
1096
 
        # Reschedule checker run
1097
 
        gobject.source_remove(self.checker_initiator_tag)
1098
 
        self.checker_initiator_tag = (gobject.timeout_add
1099
 
                                      (value, self.start_checker))
1100
 
        self.start_checker()    # Start one now, too
 
2111
        if self.enabled:
 
2112
            # Reschedule checker run
 
2113
            GLib.source_remove(self.checker_initiator_tag)
 
2114
            self.checker_initiator_tag = GLib.timeout_add(
 
2115
                value, self.start_checker)
 
2116
            self.start_checker()  # Start one now, too
1101
2117
 
1102
2118
    # Checker - property
1103
 
    @dbus_service_property(_interface, signature="s",
 
2119
    @dbus_service_property(_interface,
 
2120
                           signature="s",
1104
2121
                           access="readwrite")
1105
2122
    def Checker_dbus_property(self, value=None):
1106
2123
        if value is None:       # get
1107
2124
            return dbus.String(self.checker_command)
1108
 
        self.checker_command = value
1109
 
        # Emit D-Bus signal
1110
 
        self.PropertyChanged(dbus.String("Checker"),
1111
 
                             dbus.String(self.checker_command,
1112
 
                                         variant_level=1))
1113
 
    
 
2125
        self.checker_command = str(value)
 
2126
 
1114
2127
    # CheckerRunning - property
1115
 
    @dbus_service_property(_interface, signature="b",
 
2128
    @dbus_service_property(_interface,
 
2129
                           signature="b",
1116
2130
                           access="readwrite")
1117
2131
    def CheckerRunning_dbus_property(self, value=None):
1118
2132
        if value is None:       # get
1121
2135
            self.start_checker()
1122
2136
        else:
1123
2137
            self.stop_checker()
1124
 
    
 
2138
 
1125
2139
    # ObjectPath - property
 
2140
    @dbus_annotations(
 
2141
        {"org.freedesktop.DBus.Property.EmitsChangedSignal": "const",
 
2142
         "org.freedesktop.DBus.Deprecated": "true"})
1126
2143
    @dbus_service_property(_interface, signature="o", access="read")
1127
2144
    def ObjectPath_dbus_property(self):
1128
 
        return self.dbus_object_path # is already a dbus.ObjectPath
1129
 
    
 
2145
        return self.dbus_object_path  # is already a dbus.ObjectPath
 
2146
 
1130
2147
    # Secret = property
1131
 
    @dbus_service_property(_interface, signature="ay",
1132
 
                           access="write", byte_arrays=True)
 
2148
    @dbus_annotations(
 
2149
        {"org.freedesktop.DBus.Property.EmitsChangedSignal":
 
2150
         "invalidates"})
 
2151
    @dbus_service_property(_interface,
 
2152
                           signature="ay",
 
2153
                           access="write",
 
2154
                           byte_arrays=True)
1133
2155
    def Secret_dbus_property(self, value):
1134
 
        self.secret = str(value)
1135
 
    
 
2156
        self.secret = bytes(value)
 
2157
 
1136
2158
    del _interface
1137
2159
 
1138
2160
 
1141
2163
        self._pipe = child_pipe
1142
2164
        self._pipe.send(('init', fpr, address))
1143
2165
        if not self._pipe.recv():
1144
 
            raise KeyError()
 
2166
            raise KeyError(fpr)
1145
2167
 
1146
2168
    def __getattribute__(self, name):
1147
 
        if(name == '_pipe'):
 
2169
        if name == '_pipe':
1148
2170
            return super(ProxyClient, self).__getattribute__(name)
1149
2171
        self._pipe.send(('getattr', name))
1150
2172
        data = self._pipe.recv()
1151
2173
        if data[0] == 'data':
1152
2174
            return data[1]
1153
2175
        if data[0] == 'function':
 
2176
 
1154
2177
            def func(*args, **kwargs):
1155
2178
                self._pipe.send(('funcall', name, args, kwargs))
1156
2179
                return self._pipe.recv()[1]
 
2180
 
1157
2181
            return func
1158
2182
 
1159
2183
    def __setattr__(self, name, value):
1160
 
        if(name == '_pipe'):
 
2184
        if name == '_pipe':
1161
2185
            return super(ProxyClient, self).__setattr__(name, value)
1162
2186
        self._pipe.send(('setattr', name, value))
1163
2187
 
1164
2188
 
1165
2189
class ClientHandler(socketserver.BaseRequestHandler, object):
1166
2190
    """A class to handle client connections.
1167
 
    
 
2191
 
1168
2192
    Instantiated once for each connection to handle it.
1169
2193
    Note: This will run in its own forked process."""
1170
 
    
 
2194
 
1171
2195
    def handle(self):
1172
2196
        with contextlib.closing(self.server.child_pipe) as child_pipe:
1173
2197
            logger.info("TCP connection from: %s",
1174
 
                        unicode(self.client_address))
 
2198
                        str(self.client_address))
1175
2199
            logger.debug("Pipe FD: %d",
1176
2200
                         self.server.child_pipe.fileno())
1177
2201
 
1178
 
            session = (gnutls.connection
1179
 
                       .ClientSession(self.request,
1180
 
                                      gnutls.connection
1181
 
                                      .X509Credentials()))
1182
 
 
1183
 
            # Note: gnutls.connection.X509Credentials is really a
1184
 
            # generic GnuTLS certificate credentials object so long as
1185
 
            # no X.509 keys are added to it.  Therefore, we can use it
1186
 
            # here despite using OpenPGP certificates.
1187
 
 
1188
 
            #priority = ':'.join(("NONE", "+VERS-TLS1.1",
1189
 
            #                      "+AES-256-CBC", "+SHA1",
1190
 
            #                      "+COMP-NULL", "+CTYPE-OPENPGP",
1191
 
            #                      "+DHE-DSS"))
 
2202
            session = gnutls.ClientSession(self.request)
 
2203
 
 
2204
            # priority = ':'.join(("NONE", "+VERS-TLS1.1",
 
2205
            #                       "+AES-256-CBC", "+SHA1",
 
2206
            #                       "+COMP-NULL", "+CTYPE-OPENPGP",
 
2207
            #                       "+DHE-DSS"))
1192
2208
            # Use a fallback default, since this MUST be set.
1193
2209
            priority = self.server.gnutls_priority
1194
2210
            if priority is None:
1195
2211
                priority = "NORMAL"
1196
 
            (gnutls.library.functions
1197
 
             .gnutls_priority_set_direct(session._c_object,
1198
 
                                         priority, None))
 
2212
            gnutls.priority_set_direct(session._c_object,
 
2213
                                       priority.encode("utf-8"),
 
2214
                                       None)
1199
2215
 
1200
2216
            # Start communication using the Mandos protocol
1201
2217
            # Get protocol number
1203
2219
            logger.debug("Protocol version: %r", line)
1204
2220
            try:
1205
2221
                if int(line.strip().split()[0]) > 1:
1206
 
                    raise RuntimeError
1207
 
            except (ValueError, IndexError, RuntimeError), error:
 
2222
                    raise RuntimeError(line)
 
2223
            except (ValueError, IndexError, RuntimeError) as error:
1208
2224
                logger.error("Unknown protocol version: %s", error)
1209
2225
                return
1210
2226
 
1211
2227
            # Start GnuTLS connection
1212
2228
            try:
1213
2229
                session.handshake()
1214
 
            except gnutls.errors.GNUTLSError, error:
 
2230
            except gnutls.Error as error:
1215
2231
                logger.warning("Handshake failed: %s", error)
1216
2232
                # Do not run session.bye() here: the session is not
1217
2233
                # established.  Just abandon the request.
1221
2237
            approval_required = False
1222
2238
            try:
1223
2239
                try:
1224
 
                    fpr = self.fingerprint(self.peer_certificate
1225
 
                                           (session))
1226
 
                except (TypeError, gnutls.errors.GNUTLSError), error:
 
2240
                    fpr = self.fingerprint(
 
2241
                        self.peer_certificate(session))
 
2242
                except (TypeError, gnutls.Error) as error:
1227
2243
                    logger.warning("Bad certificate: %s", error)
1228
2244
                    return
1229
2245
                logger.debug("Fingerprint: %s", fpr)
1233
2249
                                         self.client_address)
1234
2250
                except KeyError:
1235
2251
                    return
1236
 
                
 
2252
 
1237
2253
                if client.approval_delay:
1238
2254
                    delay = client.approval_delay
1239
2255
                    client.approvals_pending += 1
1240
2256
                    approval_required = True
1241
 
                
 
2257
 
1242
2258
                while True:
1243
2259
                    if not client.enabled:
1244
 
                        logger.warning("Client %s is disabled",
1245
 
                                       client.name)
 
2260
                        logger.info("Client %s is disabled",
 
2261
                                    client.name)
1246
2262
                        if self.server.use_dbus:
1247
2263
                            # Emit D-Bus signal
1248
 
                            client.Rejected("Disabled")                    
 
2264
                            client.Rejected("Disabled")
1249
2265
                        return
1250
 
                    
1251
 
                    if client._approved or not client.approval_delay:
1252
 
                        #We are approved or approval is disabled
 
2266
 
 
2267
                    if client.approved or not client.approval_delay:
 
2268
                        # We are approved or approval is disabled
1253
2269
                        break
1254
 
                    elif client._approved is None:
 
2270
                    elif client.approved is None:
1255
2271
                        logger.info("Client %s needs approval",
1256
2272
                                    client.name)
1257
2273
                        if self.server.use_dbus:
1258
2274
                            # Emit D-Bus signal
1259
2275
                            client.NeedApproval(
1260
 
                                client.approval_delay_milliseconds(),
1261
 
                                client.approved_by_default)
 
2276
                                client.approval_delay.total_seconds()
 
2277
                                * 1000, client.approved_by_default)
1262
2278
                    else:
1263
2279
                        logger.warning("Client %s was not approved",
1264
2280
                                       client.name)
1266
2282
                            # Emit D-Bus signal
1267
2283
                            client.Rejected("Denied")
1268
2284
                        return
1269
 
                    
1270
 
                    #wait until timeout or approved
1271
 
                    #x = float(client._timedelta_to_milliseconds(delay))
 
2285
 
 
2286
                    # wait until timeout or approved
1272
2287
                    time = datetime.datetime.now()
1273
2288
                    client.changedstate.acquire()
1274
 
                    client.changedstate.wait(float(client._timedelta_to_milliseconds(delay) / 1000))
 
2289
                    client.changedstate.wait(delay.total_seconds())
1275
2290
                    client.changedstate.release()
1276
2291
                    time2 = datetime.datetime.now()
1277
2292
                    if (time2 - time) >= delay:
1287
2302
                            break
1288
2303
                    else:
1289
2304
                        delay -= time2 - time
1290
 
                
1291
 
                sent_size = 0
1292
 
                while sent_size < len(client.secret):
1293
 
                    try:
1294
 
                        sent = session.send(client.secret[sent_size:])
1295
 
                    except (gnutls.errors.GNUTLSError), error:
1296
 
                        logger.warning("gnutls send failed")
1297
 
                        return
1298
 
                    logger.debug("Sent: %d, remaining: %d",
1299
 
                                 sent, len(client.secret)
1300
 
                                 - (sent_size + sent))
1301
 
                    sent_size += sent
 
2305
 
 
2306
                try:
 
2307
                    session.send(client.secret)
 
2308
                except gnutls.Error as error:
 
2309
                    logger.warning("gnutls send failed",
 
2310
                                   exc_info=error)
 
2311
                    return
1302
2312
 
1303
2313
                logger.info("Sending secret to %s", client.name)
1304
 
                # bump the timeout as if seen
1305
 
                client.checked_ok()
 
2314
                # bump the timeout using extended_timeout
 
2315
                client.bump_timeout(client.extended_timeout)
1306
2316
                if self.server.use_dbus:
1307
2317
                    # Emit D-Bus signal
1308
2318
                    client.GotSecret()
1309
 
            
 
2319
 
1310
2320
            finally:
1311
2321
                if approval_required:
1312
2322
                    client.approvals_pending -= 1
1313
2323
                try:
1314
2324
                    session.bye()
1315
 
                except (gnutls.errors.GNUTLSError), error:
1316
 
                    logger.warning("GnuTLS bye failed")
1317
 
    
 
2325
                except gnutls.Error as error:
 
2326
                    logger.warning("GnuTLS bye failed",
 
2327
                                   exc_info=error)
 
2328
 
1318
2329
    @staticmethod
1319
2330
    def peer_certificate(session):
1320
2331
        "Return the peer's OpenPGP certificate as a bytestring"
1321
2332
        # If not an OpenPGP certificate...
1322
 
        if (gnutls.library.functions
1323
 
            .gnutls_certificate_type_get(session._c_object)
1324
 
            != gnutls.library.constants.GNUTLS_CRT_OPENPGP):
1325
 
            # ...do the normal thing
1326
 
            return session.peer_certificate
 
2333
        if (gnutls.certificate_type_get(session._c_object)
 
2334
            != gnutls.CRT_OPENPGP):
 
2335
            # ...return invalid data
 
2336
            return b""
1327
2337
        list_size = ctypes.c_uint(1)
1328
 
        cert_list = (gnutls.library.functions
1329
 
                     .gnutls_certificate_get_peers
 
2338
        cert_list = (gnutls.certificate_get_peers
1330
2339
                     (session._c_object, ctypes.byref(list_size)))
1331
2340
        if not bool(cert_list) and list_size.value != 0:
1332
 
            raise gnutls.errors.GNUTLSError("error getting peer"
1333
 
                                            " certificate")
 
2341
            raise gnutls.Error("error getting peer certificate")
1334
2342
        if list_size.value == 0:
1335
2343
            return None
1336
2344
        cert = cert_list[0]
1337
2345
        return ctypes.string_at(cert.data, cert.size)
1338
 
    
 
2346
 
1339
2347
    @staticmethod
1340
2348
    def fingerprint(openpgp):
1341
2349
        "Convert an OpenPGP bytestring to a hexdigit fingerprint"
1342
2350
        # New GnuTLS "datum" with the OpenPGP public key
1343
 
        datum = (gnutls.library.types
1344
 
                 .gnutls_datum_t(ctypes.cast(ctypes.c_char_p(openpgp),
1345
 
                                             ctypes.POINTER
1346
 
                                             (ctypes.c_ubyte)),
1347
 
                                 ctypes.c_uint(len(openpgp))))
 
2351
        datum = gnutls.datum_t(
 
2352
            ctypes.cast(ctypes.c_char_p(openpgp),
 
2353
                        ctypes.POINTER(ctypes.c_ubyte)),
 
2354
            ctypes.c_uint(len(openpgp)))
1348
2355
        # New empty GnuTLS certificate
1349
 
        crt = gnutls.library.types.gnutls_openpgp_crt_t()
1350
 
        (gnutls.library.functions
1351
 
         .gnutls_openpgp_crt_init(ctypes.byref(crt)))
 
2356
        crt = gnutls.openpgp_crt_t()
 
2357
        gnutls.openpgp_crt_init(ctypes.byref(crt))
1352
2358
        # Import the OpenPGP public key into the certificate
1353
 
        (gnutls.library.functions
1354
 
         .gnutls_openpgp_crt_import(crt, ctypes.byref(datum),
1355
 
                                    gnutls.library.constants
1356
 
                                    .GNUTLS_OPENPGP_FMT_RAW))
 
2359
        gnutls.openpgp_crt_import(crt, ctypes.byref(datum),
 
2360
                                  gnutls.OPENPGP_FMT_RAW)
1357
2361
        # Verify the self signature in the key
1358
2362
        crtverify = ctypes.c_uint()
1359
 
        (gnutls.library.functions
1360
 
         .gnutls_openpgp_crt_verify_self(crt, 0,
1361
 
                                         ctypes.byref(crtverify)))
 
2363
        gnutls.openpgp_crt_verify_self(crt, 0,
 
2364
                                       ctypes.byref(crtverify))
1362
2365
        if crtverify.value != 0:
1363
 
            gnutls.library.functions.gnutls_openpgp_crt_deinit(crt)
1364
 
            raise (gnutls.errors.CertificateSecurityError
1365
 
                   ("Verify failed"))
 
2366
            gnutls.openpgp_crt_deinit(crt)
 
2367
            raise gnutls.CertificateSecurityError("Verify failed")
1366
2368
        # New buffer for the fingerprint
1367
2369
        buf = ctypes.create_string_buffer(20)
1368
2370
        buf_len = ctypes.c_size_t()
1369
2371
        # Get the fingerprint from the certificate into the buffer
1370
 
        (gnutls.library.functions
1371
 
         .gnutls_openpgp_crt_get_fingerprint(crt, ctypes.byref(buf),
1372
 
                                             ctypes.byref(buf_len)))
 
2372
        gnutls.openpgp_crt_get_fingerprint(crt, ctypes.byref(buf),
 
2373
                                           ctypes.byref(buf_len))
1373
2374
        # Deinit the certificate
1374
 
        gnutls.library.functions.gnutls_openpgp_crt_deinit(crt)
 
2375
        gnutls.openpgp_crt_deinit(crt)
1375
2376
        # Convert the buffer to a Python bytestring
1376
2377
        fpr = ctypes.string_at(buf, buf_len.value)
1377
2378
        # Convert the bytestring to hexadecimal notation
1378
 
        hex_fpr = ''.join("%02X" % ord(char) for char in fpr)
 
2379
        hex_fpr = binascii.hexlify(fpr).upper()
1379
2380
        return hex_fpr
1380
2381
 
1381
2382
 
1382
2383
class MultiprocessingMixIn(object):
1383
2384
    """Like socketserver.ThreadingMixIn, but with multiprocessing"""
 
2385
 
1384
2386
    def sub_process_main(self, request, address):
1385
2387
        try:
1386
2388
            self.finish_request(request, address)
1387
 
        except:
 
2389
        except Exception:
1388
2390
            self.handle_error(request, address)
1389
2391
        self.close_request(request)
1390
 
            
 
2392
 
1391
2393
    def process_request(self, request, address):
1392
2394
        """Start a new process to process the request."""
1393
 
        multiprocessing.Process(target = self.sub_process_main,
1394
 
                                args = (request, address)).start()
 
2395
        proc = multiprocessing.Process(target=self.sub_process_main,
 
2396
                                       args=(request, address))
 
2397
        proc.start()
 
2398
        return proc
 
2399
 
1395
2400
 
1396
2401
class MultiprocessingMixInWithPipe(MultiprocessingMixIn, object):
1397
2402
    """ adds a pipe to the MixIn """
 
2403
 
1398
2404
    def process_request(self, request, client_address):
1399
2405
        """Overrides and wraps the original process_request().
1400
 
        
 
2406
 
1401
2407
        This function creates a new pipe in self.pipe
1402
2408
        """
1403
2409
        parent_pipe, self.child_pipe = multiprocessing.Pipe()
1404
2410
 
1405
 
        super(MultiprocessingMixInWithPipe,
1406
 
              self).process_request(request, client_address)
 
2411
        proc = MultiprocessingMixIn.process_request(self, request,
 
2412
                                                    client_address)
1407
2413
        self.child_pipe.close()
1408
 
        self.add_pipe(parent_pipe)
 
2414
        self.add_pipe(parent_pipe, proc)
1409
2415
 
1410
 
    def add_pipe(self, parent_pipe):
 
2416
    def add_pipe(self, parent_pipe, proc):
1411
2417
        """Dummy function; override as necessary"""
1412
 
        raise NotImplementedError
 
2418
        raise NotImplementedError()
 
2419
 
1413
2420
 
1414
2421
class IPv6_TCPServer(MultiprocessingMixInWithPipe,
1415
2422
                     socketserver.TCPServer, object):
1416
2423
    """IPv6-capable TCP server.  Accepts 'None' as address and/or port
1417
 
    
 
2424
 
1418
2425
    Attributes:
1419
2426
        enabled:        Boolean; whether this server is activated yet
1420
2427
        interface:      None or a network interface name (string)
1421
2428
        use_ipv6:       Boolean; to use IPv6 or not
1422
2429
    """
 
2430
 
1423
2431
    def __init__(self, server_address, RequestHandlerClass,
1424
 
                 interface=None, use_ipv6=True):
 
2432
                 interface=None,
 
2433
                 use_ipv6=True,
 
2434
                 socketfd=None):
 
2435
        """If socketfd is set, use that file descriptor instead of
 
2436
        creating a new one with socket.socket().
 
2437
        """
1425
2438
        self.interface = interface
1426
2439
        if use_ipv6:
1427
2440
            self.address_family = socket.AF_INET6
 
2441
        if socketfd is not None:
 
2442
            # Save the file descriptor
 
2443
            self.socketfd = socketfd
 
2444
            # Save the original socket.socket() function
 
2445
            self.socket_socket = socket.socket
 
2446
 
 
2447
            # To implement --socket, we monkey patch socket.socket.
 
2448
            #
 
2449
            # (When socketserver.TCPServer is a new-style class, we
 
2450
            # could make self.socket into a property instead of monkey
 
2451
            # patching socket.socket.)
 
2452
            #
 
2453
            # Create a one-time-only replacement for socket.socket()
 
2454
            @functools.wraps(socket.socket)
 
2455
            def socket_wrapper(*args, **kwargs):
 
2456
                # Restore original function so subsequent calls are
 
2457
                # not affected.
 
2458
                socket.socket = self.socket_socket
 
2459
                del self.socket_socket
 
2460
                # This time only, return a new socket object from the
 
2461
                # saved file descriptor.
 
2462
                return socket.fromfd(self.socketfd, *args, **kwargs)
 
2463
            # Replace socket.socket() function with wrapper
 
2464
            socket.socket = socket_wrapper
 
2465
        # The socketserver.TCPServer.__init__ will call
 
2466
        # socket.socket(), which might be our replacement,
 
2467
        # socket_wrapper(), if socketfd was set.
1428
2468
        socketserver.TCPServer.__init__(self, server_address,
1429
2469
                                        RequestHandlerClass)
 
2470
 
1430
2471
    def server_bind(self):
1431
2472
        """This overrides the normal server_bind() function
1432
2473
        to bind to an interface if one was specified, and also NOT to
1433
2474
        bind to an address or port if they were not specified."""
 
2475
        global SO_BINDTODEVICE
1434
2476
        if self.interface is not None:
1435
2477
            if SO_BINDTODEVICE is None:
1436
 
                logger.error("SO_BINDTODEVICE does not exist;"
1437
 
                             " cannot bind to interface %s",
1438
 
                             self.interface)
1439
 
            else:
1440
 
                try:
1441
 
                    self.socket.setsockopt(socket.SOL_SOCKET,
1442
 
                                           SO_BINDTODEVICE,
1443
 
                                           str(self.interface
1444
 
                                               + '\0'))
1445
 
                except socket.error, error:
1446
 
                    if error[0] == errno.EPERM:
1447
 
                        logger.error("No permission to"
1448
 
                                     " bind to interface %s",
1449
 
                                     self.interface)
1450
 
                    elif error[0] == errno.ENOPROTOOPT:
1451
 
                        logger.error("SO_BINDTODEVICE not available;"
1452
 
                                     " cannot bind to interface %s",
1453
 
                                     self.interface)
1454
 
                    else:
1455
 
                        raise
 
2478
                # Fall back to a hard-coded value which seems to be
 
2479
                # common enough.
 
2480
                logger.warning("SO_BINDTODEVICE not found, trying 25")
 
2481
                SO_BINDTODEVICE = 25
 
2482
            try:
 
2483
                self.socket.setsockopt(
 
2484
                    socket.SOL_SOCKET, SO_BINDTODEVICE,
 
2485
                    (self.interface + "\0").encode("utf-8"))
 
2486
            except socket.error as error:
 
2487
                if error.errno == errno.EPERM:
 
2488
                    logger.error("No permission to bind to"
 
2489
                                 " interface %s", self.interface)
 
2490
                elif error.errno == errno.ENOPROTOOPT:
 
2491
                    logger.error("SO_BINDTODEVICE not available;"
 
2492
                                 " cannot bind to interface %s",
 
2493
                                 self.interface)
 
2494
                elif error.errno == errno.ENODEV:
 
2495
                    logger.error("Interface %s does not exist,"
 
2496
                                 " cannot bind", self.interface)
 
2497
                else:
 
2498
                    raise
1456
2499
        # Only bind(2) the socket if we really need to.
1457
2500
        if self.server_address[0] or self.server_address[1]:
1458
2501
            if not self.server_address[0]:
1459
2502
                if self.address_family == socket.AF_INET6:
1460
 
                    any_address = "::" # in6addr_any
 
2503
                    any_address = "::"  # in6addr_any
1461
2504
                else:
1462
 
                    any_address = socket.INADDR_ANY
 
2505
                    any_address = "0.0.0.0"  # INADDR_ANY
1463
2506
                self.server_address = (any_address,
1464
2507
                                       self.server_address[1])
1465
2508
            elif not self.server_address[1]:
1466
 
                self.server_address = (self.server_address[0],
1467
 
                                       0)
 
2509
                self.server_address = (self.server_address[0], 0)
1468
2510
#                 if self.interface:
1469
2511
#                     self.server_address = (self.server_address[0],
1470
2512
#                                            0, # port
1476
2518
 
1477
2519
class MandosServer(IPv6_TCPServer):
1478
2520
    """Mandos server.
1479
 
    
 
2521
 
1480
2522
    Attributes:
1481
2523
        clients:        set of Client objects
1482
2524
        gnutls_priority GnuTLS priority string
1483
2525
        use_dbus:       Boolean; to emit D-Bus signals or not
1484
 
    
1485
 
    Assumes a gobject.MainLoop event loop.
 
2526
 
 
2527
    Assumes a GLib.MainLoop event loop.
1486
2528
    """
 
2529
 
1487
2530
    def __init__(self, server_address, RequestHandlerClass,
1488
 
                 interface=None, use_ipv6=True, clients=None,
1489
 
                 gnutls_priority=None, use_dbus=True):
 
2531
                 interface=None,
 
2532
                 use_ipv6=True,
 
2533
                 clients=None,
 
2534
                 gnutls_priority=None,
 
2535
                 use_dbus=True,
 
2536
                 socketfd=None):
1490
2537
        self.enabled = False
1491
2538
        self.clients = clients
1492
2539
        if self.clients is None:
1493
 
            self.clients = set()
 
2540
            self.clients = {}
1494
2541
        self.use_dbus = use_dbus
1495
2542
        self.gnutls_priority = gnutls_priority
1496
2543
        IPv6_TCPServer.__init__(self, server_address,
1497
2544
                                RequestHandlerClass,
1498
 
                                interface = interface,
1499
 
                                use_ipv6 = use_ipv6)
 
2545
                                interface=interface,
 
2546
                                use_ipv6=use_ipv6,
 
2547
                                socketfd=socketfd)
 
2548
 
1500
2549
    def server_activate(self):
1501
2550
        if self.enabled:
1502
2551
            return socketserver.TCPServer.server_activate(self)
 
2552
 
1503
2553
    def enable(self):
1504
2554
        self.enabled = True
1505
 
    def add_pipe(self, parent_pipe):
 
2555
 
 
2556
    def add_pipe(self, parent_pipe, proc):
1506
2557
        # Call "handle_ipc" for both data and EOF events
1507
 
        gobject.io_add_watch(parent_pipe.fileno(),
1508
 
                             gobject.IO_IN | gobject.IO_HUP,
1509
 
                             functools.partial(self.handle_ipc,
1510
 
                                               parent_pipe = parent_pipe))
1511
 
        
1512
 
    def handle_ipc(self, source, condition, parent_pipe=None,
 
2558
        GLib.io_add_watch(
 
2559
            parent_pipe.fileno(),
 
2560
            GLib.IO_IN | GLib.IO_HUP,
 
2561
            functools.partial(self.handle_ipc,
 
2562
                              parent_pipe=parent_pipe,
 
2563
                              proc=proc))
 
2564
 
 
2565
    def handle_ipc(self, source, condition,
 
2566
                   parent_pipe=None,
 
2567
                   proc=None,
1513
2568
                   client_object=None):
1514
 
        condition_names = {
1515
 
            gobject.IO_IN: "IN",   # There is data to read.
1516
 
            gobject.IO_OUT: "OUT", # Data can be written (without
1517
 
                                    # blocking).
1518
 
            gobject.IO_PRI: "PRI", # There is urgent data to read.
1519
 
            gobject.IO_ERR: "ERR", # Error condition.
1520
 
            gobject.IO_HUP: "HUP"  # Hung up (the connection has been
1521
 
                                    # broken, usually for pipes and
1522
 
                                    # sockets).
1523
 
            }
1524
 
        conditions_string = ' | '.join(name
1525
 
                                       for cond, name in
1526
 
                                       condition_names.iteritems()
1527
 
                                       if cond & condition)
1528
 
        # error or the other end of multiprocessing.Pipe has closed
1529
 
        if condition & (gobject.IO_ERR | condition & gobject.IO_HUP):
 
2569
        # error, or the other end of multiprocessing.Pipe has closed
 
2570
        if condition & (GLib.IO_ERR | GLib.IO_HUP):
 
2571
            # Wait for other process to exit
 
2572
            proc.join()
1530
2573
            return False
1531
 
        
 
2574
 
1532
2575
        # Read a request from the child
1533
2576
        request = parent_pipe.recv()
1534
2577
        command = request[0]
1535
 
        
 
2578
 
1536
2579
        if command == 'init':
1537
2580
            fpr = request[1]
1538
2581
            address = request[2]
1539
 
            
1540
 
            for c in self.clients:
 
2582
 
 
2583
            for c in self.clients.values():
1541
2584
                if c.fingerprint == fpr:
1542
2585
                    client = c
1543
2586
                    break
1544
2587
            else:
1545
 
                logger.warning("Client not found for fingerprint: %s, ad"
1546
 
                               "dress: %s", fpr, address)
 
2588
                logger.info("Client not found for fingerprint: %s, ad"
 
2589
                            "dress: %s", fpr, address)
1547
2590
                if self.use_dbus:
1548
2591
                    # Emit D-Bus signal
1549
 
                    mandos_dbus_service.ClientNotFound(fpr, address[0])
 
2592
                    mandos_dbus_service.ClientNotFound(fpr,
 
2593
                                                       address[0])
1550
2594
                parent_pipe.send(False)
1551
2595
                return False
1552
 
            
1553
 
            gobject.io_add_watch(parent_pipe.fileno(),
1554
 
                                 gobject.IO_IN | gobject.IO_HUP,
1555
 
                                 functools.partial(self.handle_ipc,
1556
 
                                                   parent_pipe = parent_pipe,
1557
 
                                                   client_object = client))
 
2596
 
 
2597
            GLib.io_add_watch(
 
2598
                parent_pipe.fileno(),
 
2599
                GLib.IO_IN | GLib.IO_HUP,
 
2600
                functools.partial(self.handle_ipc,
 
2601
                                  parent_pipe=parent_pipe,
 
2602
                                  proc=proc,
 
2603
                                  client_object=client))
1558
2604
            parent_pipe.send(True)
1559
 
            # remove the old hook in favor of the new above hook on same fileno
 
2605
            # remove the old hook in favor of the new above hook on
 
2606
            # same fileno
1560
2607
            return False
1561
2608
        if command == 'funcall':
1562
2609
            funcname = request[1]
1563
2610
            args = request[2]
1564
2611
            kwargs = request[3]
1565
 
            
1566
 
            parent_pipe.send(('data', getattr(client_object, funcname)(*args, **kwargs)))
 
2612
 
 
2613
            parent_pipe.send(('data', getattr(client_object,
 
2614
                                              funcname)(*args,
 
2615
                                                        **kwargs)))
1567
2616
 
1568
2617
        if command == 'getattr':
1569
2618
            attrname = request[1]
1570
 
            if callable(client_object.__getattribute__(attrname)):
1571
 
                parent_pipe.send(('function',))
 
2619
            if isinstance(client_object.__getattribute__(attrname),
 
2620
                          collections.Callable):
 
2621
                parent_pipe.send(('function', ))
1572
2622
            else:
1573
 
                parent_pipe.send(('data', client_object.__getattribute__(attrname)))
1574
 
        
 
2623
                parent_pipe.send((
 
2624
                    'data', client_object.__getattribute__(attrname)))
 
2625
 
1575
2626
        if command == 'setattr':
1576
2627
            attrname = request[1]
1577
2628
            value = request[2]
1580
2631
        return True
1581
2632
 
1582
2633
 
 
2634
def rfc3339_duration_to_delta(duration):
 
2635
    """Parse an RFC 3339 "duration" and return a datetime.timedelta
 
2636
 
 
2637
    >>> rfc3339_duration_to_delta("P7D")
 
2638
    datetime.timedelta(7)
 
2639
    >>> rfc3339_duration_to_delta("PT60S")
 
2640
    datetime.timedelta(0, 60)
 
2641
    >>> rfc3339_duration_to_delta("PT60M")
 
2642
    datetime.timedelta(0, 3600)
 
2643
    >>> rfc3339_duration_to_delta("PT24H")
 
2644
    datetime.timedelta(1)
 
2645
    >>> rfc3339_duration_to_delta("P1W")
 
2646
    datetime.timedelta(7)
 
2647
    >>> rfc3339_duration_to_delta("PT5M30S")
 
2648
    datetime.timedelta(0, 330)
 
2649
    >>> rfc3339_duration_to_delta("P1DT3M20S")
 
2650
    datetime.timedelta(1, 200)
 
2651
    """
 
2652
 
 
2653
    # Parsing an RFC 3339 duration with regular expressions is not
 
2654
    # possible - there would have to be multiple places for the same
 
2655
    # values, like seconds.  The current code, while more esoteric, is
 
2656
    # cleaner without depending on a parsing library.  If Python had a
 
2657
    # built-in library for parsing we would use it, but we'd like to
 
2658
    # avoid excessive use of external libraries.
 
2659
 
 
2660
    # New type for defining tokens, syntax, and semantics all-in-one
 
2661
    Token = collections.namedtuple("Token", (
 
2662
        "regexp",  # To match token; if "value" is not None, must have
 
2663
                   # a "group" containing digits
 
2664
        "value",   # datetime.timedelta or None
 
2665
        "followers"))           # Tokens valid after this token
 
2666
    # RFC 3339 "duration" tokens, syntax, and semantics; taken from
 
2667
    # the "duration" ABNF definition in RFC 3339, Appendix A.
 
2668
    token_end = Token(re.compile(r"$"), None, frozenset())
 
2669
    token_second = Token(re.compile(r"(\d+)S"),
 
2670
                         datetime.timedelta(seconds=1),
 
2671
                         frozenset((token_end, )))
 
2672
    token_minute = Token(re.compile(r"(\d+)M"),
 
2673
                         datetime.timedelta(minutes=1),
 
2674
                         frozenset((token_second, token_end)))
 
2675
    token_hour = Token(re.compile(r"(\d+)H"),
 
2676
                       datetime.timedelta(hours=1),
 
2677
                       frozenset((token_minute, token_end)))
 
2678
    token_time = Token(re.compile(r"T"),
 
2679
                       None,
 
2680
                       frozenset((token_hour, token_minute,
 
2681
                                  token_second)))
 
2682
    token_day = Token(re.compile(r"(\d+)D"),
 
2683
                      datetime.timedelta(days=1),
 
2684
                      frozenset((token_time, token_end)))
 
2685
    token_month = Token(re.compile(r"(\d+)M"),
 
2686
                        datetime.timedelta(weeks=4),
 
2687
                        frozenset((token_day, token_end)))
 
2688
    token_year = Token(re.compile(r"(\d+)Y"),
 
2689
                       datetime.timedelta(weeks=52),
 
2690
                       frozenset((token_month, token_end)))
 
2691
    token_week = Token(re.compile(r"(\d+)W"),
 
2692
                       datetime.timedelta(weeks=1),
 
2693
                       frozenset((token_end, )))
 
2694
    token_duration = Token(re.compile(r"P"), None,
 
2695
                           frozenset((token_year, token_month,
 
2696
                                      token_day, token_time,
 
2697
                                      token_week)))
 
2698
    # Define starting values:
 
2699
    # Value so far
 
2700
    value = datetime.timedelta()
 
2701
    found_token = None
 
2702
    # Following valid tokens
 
2703
    followers = frozenset((token_duration, ))
 
2704
    # String left to parse
 
2705
    s = duration
 
2706
    # Loop until end token is found
 
2707
    while found_token is not token_end:
 
2708
        # Search for any currently valid tokens
 
2709
        for token in followers:
 
2710
            match = token.regexp.match(s)
 
2711
            if match is not None:
 
2712
                # Token found
 
2713
                if token.value is not None:
 
2714
                    # Value found, parse digits
 
2715
                    factor = int(match.group(1), 10)
 
2716
                    # Add to value so far
 
2717
                    value += factor * token.value
 
2718
                # Strip token from string
 
2719
                s = token.regexp.sub("", s, 1)
 
2720
                # Go to found token
 
2721
                found_token = token
 
2722
                # Set valid next tokens
 
2723
                followers = found_token.followers
 
2724
                break
 
2725
        else:
 
2726
            # No currently valid tokens were found
 
2727
            raise ValueError("Invalid RFC 3339 duration: {!r}"
 
2728
                             .format(duration))
 
2729
    # End token found
 
2730
    return value
 
2731
 
 
2732
 
1583
2733
def string_to_delta(interval):
1584
2734
    """Parse a string and return a datetime.timedelta
1585
 
    
 
2735
 
1586
2736
    >>> string_to_delta('7d')
1587
2737
    datetime.timedelta(7)
1588
2738
    >>> string_to_delta('60s')
1596
2746
    >>> string_to_delta('5m 30s')
1597
2747
    datetime.timedelta(0, 330)
1598
2748
    """
 
2749
 
 
2750
    try:
 
2751
        return rfc3339_duration_to_delta(interval)
 
2752
    except ValueError:
 
2753
        pass
 
2754
 
1599
2755
    timevalue = datetime.timedelta(0)
1600
2756
    for s in interval.split():
1601
2757
        try:
1602
 
            suffix = unicode(s[-1])
 
2758
            suffix = s[-1]
1603
2759
            value = int(s[:-1])
1604
2760
            if suffix == "d":
1605
2761
                delta = datetime.timedelta(value)
1612
2768
            elif suffix == "w":
1613
2769
                delta = datetime.timedelta(0, 0, 0, 0, 0, 0, value)
1614
2770
            else:
1615
 
                raise ValueError("Unknown suffix %r" % suffix)
1616
 
        except (ValueError, IndexError), e:
 
2771
                raise ValueError("Unknown suffix {!r}".format(suffix))
 
2772
        except IndexError as e:
1617
2773
            raise ValueError(*(e.args))
1618
2774
        timevalue += delta
1619
2775
    return timevalue
1620
2776
 
1621
2777
 
1622
 
def if_nametoindex(interface):
1623
 
    """Call the C function if_nametoindex(), or equivalent
1624
 
    
1625
 
    Note: This function cannot accept a unicode string."""
1626
 
    global if_nametoindex
1627
 
    try:
1628
 
        if_nametoindex = (ctypes.cdll.LoadLibrary
1629
 
                          (ctypes.util.find_library("c"))
1630
 
                          .if_nametoindex)
1631
 
    except (OSError, AttributeError):
1632
 
        logger.warning("Doing if_nametoindex the hard way")
1633
 
        def if_nametoindex(interface):
1634
 
            "Get an interface index the hard way, i.e. using fcntl()"
1635
 
            SIOCGIFINDEX = 0x8933  # From /usr/include/linux/sockios.h
1636
 
            with contextlib.closing(socket.socket()) as s:
1637
 
                ifreq = fcntl.ioctl(s, SIOCGIFINDEX,
1638
 
                                    struct.pack(str("16s16x"),
1639
 
                                                interface))
1640
 
            interface_index = struct.unpack(str("I"),
1641
 
                                            ifreq[16:20])[0]
1642
 
            return interface_index
1643
 
    return if_nametoindex(interface)
1644
 
 
1645
 
 
1646
 
def daemon(nochdir = False, noclose = False):
 
2778
def daemon(nochdir=False, noclose=False):
1647
2779
    """See daemon(3).  Standard BSD Unix function.
1648
 
    
 
2780
 
1649
2781
    This should really exist as os.daemon, but it doesn't (yet)."""
1650
2782
    if os.fork():
1651
2783
        sys.exit()
1656
2788
        sys.exit()
1657
2789
    if not noclose:
1658
2790
        # Close all standard open file descriptors
1659
 
        null = os.open(os.path.devnull, os.O_NOCTTY | os.O_RDWR)
 
2791
        null = os.open(os.devnull, os.O_NOCTTY | os.O_RDWR)
1660
2792
        if not stat.S_ISCHR(os.fstat(null).st_mode):
1661
2793
            raise OSError(errno.ENODEV,
1662
 
                          "%s not a character device"
1663
 
                          % os.path.devnull)
 
2794
                          "{} not a character device"
 
2795
                          .format(os.devnull))
1664
2796
        os.dup2(null, sys.stdin.fileno())
1665
2797
        os.dup2(null, sys.stdout.fileno())
1666
2798
        os.dup2(null, sys.stderr.fileno())
1669
2801
 
1670
2802
 
1671
2803
def main():
1672
 
    
 
2804
 
1673
2805
    ##################################################################
1674
2806
    # Parsing of options, both command line and config file
1675
 
    
 
2807
 
1676
2808
    parser = argparse.ArgumentParser()
1677
2809
    parser.add_argument("-v", "--version", action="version",
1678
 
                        version = "%%(prog)s %s" % version,
 
2810
                        version="%(prog)s {}".format(version),
1679
2811
                        help="show version number and exit")
1680
2812
    parser.add_argument("-i", "--interface", metavar="IF",
1681
2813
                        help="Bind to interface IF")
1687
2819
                        help="Run self-test")
1688
2820
    parser.add_argument("--debug", action="store_true",
1689
2821
                        help="Debug mode; run in foreground and log"
1690
 
                        " to terminal")
 
2822
                        " to terminal", default=None)
1691
2823
    parser.add_argument("--debuglevel", metavar="LEVEL",
1692
2824
                        help="Debug level for stdout output")
1693
2825
    parser.add_argument("--priority", help="GnuTLS"
1700
2832
                        " files")
1701
2833
    parser.add_argument("--no-dbus", action="store_false",
1702
2834
                        dest="use_dbus", help="Do not provide D-Bus"
1703
 
                        " system bus interface")
 
2835
                        " system bus interface", default=None)
1704
2836
    parser.add_argument("--no-ipv6", action="store_false",
1705
 
                        dest="use_ipv6", help="Do not use IPv6")
 
2837
                        dest="use_ipv6", help="Do not use IPv6",
 
2838
                        default=None)
 
2839
    parser.add_argument("--no-restore", action="store_false",
 
2840
                        dest="restore", help="Do not restore stored"
 
2841
                        " state", default=None)
 
2842
    parser.add_argument("--socket", type=int,
 
2843
                        help="Specify a file descriptor to a network"
 
2844
                        " socket to use instead of creating one")
 
2845
    parser.add_argument("--statedir", metavar="DIR",
 
2846
                        help="Directory to save/restore state in")
 
2847
    parser.add_argument("--foreground", action="store_true",
 
2848
                        help="Run in foreground", default=None)
 
2849
    parser.add_argument("--no-zeroconf", action="store_false",
 
2850
                        dest="zeroconf", help="Do not use Zeroconf",
 
2851
                        default=None)
 
2852
 
1706
2853
    options = parser.parse_args()
1707
 
    
 
2854
 
1708
2855
    if options.check:
1709
2856
        import doctest
1710
 
        doctest.testmod()
1711
 
        sys.exit()
1712
 
    
 
2857
        fail_count, test_count = doctest.testmod()
 
2858
        sys.exit(os.EX_OK if fail_count == 0 else 1)
 
2859
 
1713
2860
    # Default values for config file for server-global settings
1714
 
    server_defaults = { "interface": "",
1715
 
                        "address": "",
1716
 
                        "port": "",
1717
 
                        "debug": "False",
1718
 
                        "priority":
1719
 
                        "SECURE256:!CTYPE-X.509:+CTYPE-OPENPGP",
1720
 
                        "servicename": "Mandos",
1721
 
                        "use_dbus": "True",
1722
 
                        "use_ipv6": "True",
1723
 
                        "debuglevel": "",
1724
 
                        }
1725
 
    
 
2861
    server_defaults = {"interface": "",
 
2862
                       "address": "",
 
2863
                       "port": "",
 
2864
                       "debug": "False",
 
2865
                       "priority":
 
2866
                       "SECURE256:!CTYPE-X.509:+CTYPE-OPENPGP:!RSA"
 
2867
                       ":+SIGN-DSA-SHA256",
 
2868
                       "servicename": "Mandos",
 
2869
                       "use_dbus": "True",
 
2870
                       "use_ipv6": "True",
 
2871
                       "debuglevel": "",
 
2872
                       "restore": "True",
 
2873
                       "socket": "",
 
2874
                       "statedir": "/var/lib/mandos",
 
2875
                       "foreground": "False",
 
2876
                       "zeroconf": "True",
 
2877
                       }
 
2878
 
1726
2879
    # Parse config file for server-global settings
1727
2880
    server_config = configparser.SafeConfigParser(server_defaults)
1728
2881
    del server_defaults
1729
 
    server_config.read(os.path.join(options.configdir,
1730
 
                                    "mandos.conf"))
 
2882
    server_config.read(os.path.join(options.configdir, "mandos.conf"))
1731
2883
    # Convert the SafeConfigParser object to a dict
1732
2884
    server_settings = server_config.defaults()
1733
2885
    # Use the appropriate methods on the non-string config options
1734
 
    for option in ("debug", "use_dbus", "use_ipv6"):
 
2886
    for option in ("debug", "use_dbus", "use_ipv6", "foreground"):
1735
2887
        server_settings[option] = server_config.getboolean("DEFAULT",
1736
2888
                                                           option)
1737
2889
    if server_settings["port"]:
1738
2890
        server_settings["port"] = server_config.getint("DEFAULT",
1739
2891
                                                       "port")
 
2892
    if server_settings["socket"]:
 
2893
        server_settings["socket"] = server_config.getint("DEFAULT",
 
2894
                                                         "socket")
 
2895
        # Later, stdin will, and stdout and stderr might, be dup'ed
 
2896
        # over with an opened os.devnull.  But we don't want this to
 
2897
        # happen with a supplied network socket.
 
2898
        if 0 <= server_settings["socket"] <= 2:
 
2899
            server_settings["socket"] = os.dup(server_settings
 
2900
                                               ["socket"])
1740
2901
    del server_config
1741
 
    
 
2902
 
1742
2903
    # Override the settings from the config file with command line
1743
2904
    # options, if set.
1744
2905
    for option in ("interface", "address", "port", "debug",
1745
 
                   "priority", "servicename", "configdir",
1746
 
                   "use_dbus", "use_ipv6", "debuglevel"):
 
2906
                   "priority", "servicename", "configdir", "use_dbus",
 
2907
                   "use_ipv6", "debuglevel", "restore", "statedir",
 
2908
                   "socket", "foreground", "zeroconf"):
1747
2909
        value = getattr(options, option)
1748
2910
        if value is not None:
1749
2911
            server_settings[option] = value
1750
2912
    del options
1751
2913
    # Force all strings to be unicode
1752
2914
    for option in server_settings.keys():
1753
 
        if type(server_settings[option]) is str:
1754
 
            server_settings[option] = unicode(server_settings[option])
 
2915
        if isinstance(server_settings[option], bytes):
 
2916
            server_settings[option] = (server_settings[option]
 
2917
                                       .decode("utf-8"))
 
2918
    # Force all boolean options to be boolean
 
2919
    for option in ("debug", "use_dbus", "use_ipv6", "restore",
 
2920
                   "foreground", "zeroconf"):
 
2921
        server_settings[option] = bool(server_settings[option])
 
2922
    # Debug implies foreground
 
2923
    if server_settings["debug"]:
 
2924
        server_settings["foreground"] = True
1755
2925
    # Now we have our good server settings in "server_settings"
1756
 
    
 
2926
 
1757
2927
    ##################################################################
1758
 
    
 
2928
 
 
2929
    if (not server_settings["zeroconf"]
 
2930
        and not (server_settings["port"]
 
2931
                 or server_settings["socket"] != "")):
 
2932
        parser.error("Needs port or socket to work without Zeroconf")
 
2933
 
1759
2934
    # For convenience
1760
2935
    debug = server_settings["debug"]
1761
2936
    debuglevel = server_settings["debuglevel"]
1762
2937
    use_dbus = server_settings["use_dbus"]
1763
2938
    use_ipv6 = server_settings["use_ipv6"]
 
2939
    stored_state_path = os.path.join(server_settings["statedir"],
 
2940
                                     stored_state_file)
 
2941
    foreground = server_settings["foreground"]
 
2942
    zeroconf = server_settings["zeroconf"]
 
2943
 
 
2944
    if debug:
 
2945
        initlogger(debug, logging.DEBUG)
 
2946
    else:
 
2947
        if not debuglevel:
 
2948
            initlogger(debug)
 
2949
        else:
 
2950
            level = getattr(logging, debuglevel.upper())
 
2951
            initlogger(debug, level)
1764
2952
 
1765
2953
    if server_settings["servicename"] != "Mandos":
1766
 
        syslogger.setFormatter(logging.Formatter
1767
 
                               ('Mandos (%s) [%%(process)d]:'
1768
 
                                ' %%(levelname)s: %%(message)s'
1769
 
                                % server_settings["servicename"]))
1770
 
    
 
2954
        syslogger.setFormatter(
 
2955
            logging.Formatter('Mandos ({}) [%(process)d]:'
 
2956
                              ' %(levelname)s: %(message)s'.format(
 
2957
                                  server_settings["servicename"])))
 
2958
 
1771
2959
    # Parse config file with clients
1772
 
    client_defaults = { "timeout": "1h",
1773
 
                        "interval": "5m",
1774
 
                        "checker": "fping -q -- %%(host)s",
1775
 
                        "host": "",
1776
 
                        "approval_delay": "0s",
1777
 
                        "approval_duration": "1s",
1778
 
                        }
1779
 
    client_config = configparser.SafeConfigParser(client_defaults)
 
2960
    client_config = configparser.SafeConfigParser(Client
 
2961
                                                  .client_defaults)
1780
2962
    client_config.read(os.path.join(server_settings["configdir"],
1781
2963
                                    "clients.conf"))
1782
 
    
 
2964
 
1783
2965
    global mandos_dbus_service
1784
2966
    mandos_dbus_service = None
1785
 
    
1786
 
    tcp_server = MandosServer((server_settings["address"],
1787
 
                               server_settings["port"]),
1788
 
                              ClientHandler,
1789
 
                              interface=(server_settings["interface"]
1790
 
                                         or None),
1791
 
                              use_ipv6=use_ipv6,
1792
 
                              gnutls_priority=
1793
 
                              server_settings["priority"],
1794
 
                              use_dbus=use_dbus)
1795
 
    if not debug:
1796
 
        pidfilename = "/var/run/mandos.pid"
1797
 
        try:
1798
 
            pidfile = open(pidfilename, "w")
1799
 
        except IOError:
1800
 
            logger.error("Could not open file %r", pidfilename)
1801
 
    
1802
 
    try:
1803
 
        uid = pwd.getpwnam("_mandos").pw_uid
1804
 
        gid = pwd.getpwnam("_mandos").pw_gid
1805
 
    except KeyError:
1806
 
        try:
1807
 
            uid = pwd.getpwnam("mandos").pw_uid
1808
 
            gid = pwd.getpwnam("mandos").pw_gid
 
2967
 
 
2968
    socketfd = None
 
2969
    if server_settings["socket"] != "":
 
2970
        socketfd = server_settings["socket"]
 
2971
    tcp_server = MandosServer(
 
2972
        (server_settings["address"], server_settings["port"]),
 
2973
        ClientHandler,
 
2974
        interface=(server_settings["interface"] or None),
 
2975
        use_ipv6=use_ipv6,
 
2976
        gnutls_priority=server_settings["priority"],
 
2977
        use_dbus=use_dbus,
 
2978
        socketfd=socketfd)
 
2979
    if not foreground:
 
2980
        pidfilename = "/run/mandos.pid"
 
2981
        if not os.path.isdir("/run/."):
 
2982
            pidfilename = "/var/run/mandos.pid"
 
2983
        pidfile = None
 
2984
        try:
 
2985
            pidfile = codecs.open(pidfilename, "w", encoding="utf-8")
 
2986
        except IOError as e:
 
2987
            logger.error("Could not open file %r", pidfilename,
 
2988
                         exc_info=e)
 
2989
 
 
2990
    for name, group in (("_mandos", "_mandos"),
 
2991
                        ("mandos", "mandos"),
 
2992
                        ("nobody", "nogroup")):
 
2993
        try:
 
2994
            uid = pwd.getpwnam(name).pw_uid
 
2995
            gid = pwd.getpwnam(group).pw_gid
 
2996
            break
1809
2997
        except KeyError:
1810
 
            try:
1811
 
                uid = pwd.getpwnam("nobody").pw_uid
1812
 
                gid = pwd.getpwnam("nobody").pw_gid
1813
 
            except KeyError:
1814
 
                uid = 65534
1815
 
                gid = 65534
 
2998
            continue
 
2999
    else:
 
3000
        uid = 65534
 
3001
        gid = 65534
1816
3002
    try:
1817
3003
        os.setgid(gid)
1818
3004
        os.setuid(uid)
1819
 
    except OSError, error:
1820
 
        if error[0] != errno.EPERM:
1821
 
            raise error
1822
 
    
1823
 
    if not debug and not debuglevel:
1824
 
        syslogger.setLevel(logging.WARNING)
1825
 
        console.setLevel(logging.WARNING)
1826
 
    if debuglevel:
1827
 
        level = getattr(logging, debuglevel.upper())
1828
 
        syslogger.setLevel(level)
1829
 
        console.setLevel(level)
 
3005
        if debug:
 
3006
            logger.debug("Did setuid/setgid to {}:{}".format(uid,
 
3007
                                                             gid))
 
3008
    except OSError as error:
 
3009
        logger.warning("Failed to setuid/setgid to {}:{}: {}"
 
3010
                       .format(uid, gid, os.strerror(error.errno)))
 
3011
        if error.errno != errno.EPERM:
 
3012
            raise
1830
3013
 
1831
3014
    if debug:
1832
3015
        # Enable all possible GnuTLS debugging
1833
 
        
 
3016
 
1834
3017
        # "Use a log level over 10 to enable all debugging options."
1835
3018
        # - GnuTLS manual
1836
 
        gnutls.library.functions.gnutls_global_set_log_level(11)
1837
 
        
1838
 
        @gnutls.library.types.gnutls_log_func
 
3019
        gnutls.global_set_log_level(11)
 
3020
 
 
3021
        @gnutls.log_func
1839
3022
        def debug_gnutls(level, string):
1840
3023
            logger.debug("GnuTLS: %s", string[:-1])
1841
 
        
1842
 
        (gnutls.library.functions
1843
 
         .gnutls_global_set_log_function(debug_gnutls))
1844
 
        
 
3024
 
 
3025
        gnutls.global_set_log_function(debug_gnutls)
 
3026
 
1845
3027
        # Redirect stdin so all checkers get /dev/null
1846
 
        null = os.open(os.path.devnull, os.O_NOCTTY | os.O_RDWR)
 
3028
        null = os.open(os.devnull, os.O_NOCTTY | os.O_RDWR)
1847
3029
        os.dup2(null, sys.stdin.fileno())
1848
3030
        if null > 2:
1849
3031
            os.close(null)
1850
 
    else:
1851
 
        # No console logging
1852
 
        logger.removeHandler(console)
1853
 
    
 
3032
 
1854
3033
    # Need to fork before connecting to D-Bus
1855
 
    if not debug:
 
3034
    if not foreground:
1856
3035
        # Close all input and output, do double fork, etc.
1857
3036
        daemon()
1858
 
    
 
3037
 
 
3038
    # multiprocessing will use threads, so before we use GLib we need
 
3039
    # to inform GLib that threads will be used.
 
3040
    GLib.threads_init()
 
3041
 
1859
3042
    global main_loop
1860
3043
    # From the Avahi example code
1861
 
    DBusGMainLoop(set_as_default=True )
1862
 
    main_loop = gobject.MainLoop()
 
3044
    DBusGMainLoop(set_as_default=True)
 
3045
    main_loop = GLib.MainLoop()
1863
3046
    bus = dbus.SystemBus()
1864
3047
    # End of Avahi example code
1865
3048
    if use_dbus:
1866
3049
        try:
1867
 
            bus_name = dbus.service.BusName("se.bsnet.fukt.Mandos",
1868
 
                                            bus, do_not_queue=True)
1869
 
        except dbus.exceptions.NameExistsException, e:
1870
 
            logger.error(unicode(e) + ", disabling D-Bus")
 
3050
            bus_name = dbus.service.BusName("se.recompile.Mandos",
 
3051
                                            bus,
 
3052
                                            do_not_queue=True)
 
3053
            old_bus_name = dbus.service.BusName(
 
3054
                "se.bsnet.fukt.Mandos", bus,
 
3055
                do_not_queue=True)
 
3056
        except dbus.exceptions.DBusException as e:
 
3057
            logger.error("Disabling D-Bus:", exc_info=e)
1871
3058
            use_dbus = False
1872
3059
            server_settings["use_dbus"] = False
1873
3060
            tcp_server.use_dbus = False
1874
 
    protocol = avahi.PROTO_INET6 if use_ipv6 else avahi.PROTO_INET
1875
 
    service = AvahiService(name = server_settings["servicename"],
1876
 
                           servicetype = "_mandos._tcp",
1877
 
                           protocol = protocol, bus = bus)
1878
 
    if server_settings["interface"]:
1879
 
        service.interface = (if_nametoindex
1880
 
                             (str(server_settings["interface"])))
1881
 
    
 
3061
    if zeroconf:
 
3062
        protocol = avahi.PROTO_INET6 if use_ipv6 else avahi.PROTO_INET
 
3063
        service = AvahiServiceToSyslog(
 
3064
            name=server_settings["servicename"],
 
3065
            servicetype="_mandos._tcp",
 
3066
            protocol=protocol,
 
3067
            bus=bus)
 
3068
        if server_settings["interface"]:
 
3069
            service.interface = if_nametoindex(
 
3070
                server_settings["interface"].encode("utf-8"))
 
3071
 
1882
3072
    global multiprocessing_manager
1883
3073
    multiprocessing_manager = multiprocessing.Manager()
1884
 
    
 
3074
 
1885
3075
    client_class = Client
1886
3076
    if use_dbus:
1887
 
        client_class = functools.partial(ClientDBus, bus = bus)
1888
 
    def client_config_items(config, section):
1889
 
        special_settings = {
1890
 
            "approved_by_default":
1891
 
                lambda: config.getboolean(section,
1892
 
                                          "approved_by_default"),
1893
 
            }
1894
 
        for name, value in config.items(section):
 
3077
        client_class = functools.partial(ClientDBus, bus=bus)
 
3078
 
 
3079
    client_settings = Client.config_parser(client_config)
 
3080
    old_client_settings = {}
 
3081
    clients_data = {}
 
3082
 
 
3083
    # This is used to redirect stdout and stderr for checker processes
 
3084
    global wnull
 
3085
    wnull = open(os.devnull, "w")  # A writable /dev/null
 
3086
    # Only used if server is running in foreground but not in debug
 
3087
    # mode
 
3088
    if debug or not foreground:
 
3089
        wnull.close()
 
3090
 
 
3091
    # Get client data and settings from last running state.
 
3092
    if server_settings["restore"]:
 
3093
        try:
 
3094
            with open(stored_state_path, "rb") as stored_state:
 
3095
                if sys.version_info.major == 2:
 
3096
                    clients_data, old_client_settings = pickle.load(
 
3097
                        stored_state)
 
3098
                else:
 
3099
                    bytes_clients_data, bytes_old_client_settings = (
 
3100
                        pickle.load(stored_state, encoding="bytes"))
 
3101
                    #   Fix bytes to strings
 
3102
                    #  clients_data
 
3103
                    # .keys()
 
3104
                    clients_data = {(key.decode("utf-8")
 
3105
                                     if isinstance(key, bytes)
 
3106
                                     else key): value
 
3107
                                    for key, value in
 
3108
                                    bytes_clients_data.items()}
 
3109
                    del bytes_clients_data
 
3110
                    for key in clients_data:
 
3111
                        value = {(k.decode("utf-8")
 
3112
                                  if isinstance(k, bytes) else k): v
 
3113
                                 for k, v in
 
3114
                                 clients_data[key].items()}
 
3115
                        clients_data[key] = value
 
3116
                        # .client_structure
 
3117
                        value["client_structure"] = [
 
3118
                            (s.decode("utf-8")
 
3119
                             if isinstance(s, bytes)
 
3120
                             else s) for s in
 
3121
                            value["client_structure"]]
 
3122
                        # .name & .host
 
3123
                        for k in ("name", "host"):
 
3124
                            if isinstance(value[k], bytes):
 
3125
                                value[k] = value[k].decode("utf-8")
 
3126
                    #  old_client_settings
 
3127
                    # .keys()
 
3128
                    old_client_settings = {
 
3129
                        (key.decode("utf-8")
 
3130
                         if isinstance(key, bytes)
 
3131
                         else key): value
 
3132
                        for key, value in
 
3133
                        bytes_old_client_settings.items()}
 
3134
                    del bytes_old_client_settings
 
3135
                    # .host
 
3136
                    for value in old_client_settings.values():
 
3137
                        if isinstance(value["host"], bytes):
 
3138
                            value["host"] = (value["host"]
 
3139
                                             .decode("utf-8"))
 
3140
            os.remove(stored_state_path)
 
3141
        except IOError as e:
 
3142
            if e.errno == errno.ENOENT:
 
3143
                logger.warning("Could not load persistent state:"
 
3144
                               " {}".format(os.strerror(e.errno)))
 
3145
            else:
 
3146
                logger.critical("Could not load persistent state:",
 
3147
                                exc_info=e)
 
3148
                raise
 
3149
        except EOFError as e:
 
3150
            logger.warning("Could not load persistent state: "
 
3151
                           "EOFError:",
 
3152
                           exc_info=e)
 
3153
 
 
3154
    with PGPEngine() as pgp:
 
3155
        for client_name, client in clients_data.items():
 
3156
            # Skip removed clients
 
3157
            if client_name not in client_settings:
 
3158
                continue
 
3159
 
 
3160
            # Decide which value to use after restoring saved state.
 
3161
            # We have three different values: Old config file,
 
3162
            # new config file, and saved state.
 
3163
            # New config value takes precedence if it differs from old
 
3164
            # config value, otherwise use saved state.
 
3165
            for name, value in client_settings[client_name].items():
 
3166
                try:
 
3167
                    # For each value in new config, check if it
 
3168
                    # differs from the old config value (Except for
 
3169
                    # the "secret" attribute)
 
3170
                    if (name != "secret"
 
3171
                        and (value !=
 
3172
                             old_client_settings[client_name][name])):
 
3173
                        client[name] = value
 
3174
                except KeyError:
 
3175
                    pass
 
3176
 
 
3177
            # Clients who has passed its expire date can still be
 
3178
            # enabled if its last checker was successful.  A Client
 
3179
            # whose checker succeeded before we stored its state is
 
3180
            # assumed to have successfully run all checkers during
 
3181
            # downtime.
 
3182
            if client["enabled"]:
 
3183
                if datetime.datetime.utcnow() >= client["expires"]:
 
3184
                    if not client["last_checked_ok"]:
 
3185
                        logger.warning(
 
3186
                            "disabling client {} - Client never "
 
3187
                            "performed a successful checker".format(
 
3188
                                client_name))
 
3189
                        client["enabled"] = False
 
3190
                    elif client["last_checker_status"] != 0:
 
3191
                        logger.warning(
 
3192
                            "disabling client {} - Client last"
 
3193
                            " checker failed with error code"
 
3194
                            " {}".format(
 
3195
                                client_name,
 
3196
                                client["last_checker_status"]))
 
3197
                        client["enabled"] = False
 
3198
                    else:
 
3199
                        client["expires"] = (
 
3200
                            datetime.datetime.utcnow()
 
3201
                            + client["timeout"])
 
3202
                        logger.debug("Last checker succeeded,"
 
3203
                                     " keeping {} enabled".format(
 
3204
                                         client_name))
1895
3205
            try:
1896
 
                yield (name, special_settings[name]())
1897
 
            except KeyError:
1898
 
                yield (name, value)
1899
 
    
1900
 
    tcp_server.clients.update(set(
1901
 
            client_class(name = section,
1902
 
                         config= dict(client_config_items(
1903
 
                        client_config, section)))
1904
 
            for section in client_config.sections()))
 
3206
                client["secret"] = pgp.decrypt(
 
3207
                    client["encrypted_secret"],
 
3208
                    client_settings[client_name]["secret"])
 
3209
            except PGPError:
 
3210
                # If decryption fails, we use secret from new settings
 
3211
                logger.debug("Failed to decrypt {} old secret".format(
 
3212
                    client_name))
 
3213
                client["secret"] = (client_settings[client_name]
 
3214
                                    ["secret"])
 
3215
 
 
3216
    # Add/remove clients based on new changes made to config
 
3217
    for client_name in (set(old_client_settings)
 
3218
                        - set(client_settings)):
 
3219
        del clients_data[client_name]
 
3220
    for client_name in (set(client_settings)
 
3221
                        - set(old_client_settings)):
 
3222
        clients_data[client_name] = client_settings[client_name]
 
3223
 
 
3224
    # Create all client objects
 
3225
    for client_name, client in clients_data.items():
 
3226
        tcp_server.clients[client_name] = client_class(
 
3227
            name=client_name,
 
3228
            settings=client,
 
3229
            server_settings=server_settings)
 
3230
 
1905
3231
    if not tcp_server.clients:
1906
3232
        logger.warning("No clients defined")
1907
 
        
1908
 
    if not debug:
1909
 
        try:
1910
 
            with pidfile:
1911
 
                pid = os.getpid()
1912
 
                pidfile.write(str(pid) + "\n".encode("utf-8"))
1913
 
            del pidfile
1914
 
        except IOError:
1915
 
            logger.error("Could not write to file %r with PID %d",
1916
 
                         pidfilename, pid)
1917
 
        except NameError:
1918
 
            # "pidfile" was never created
1919
 
            pass
 
3233
 
 
3234
    if not foreground:
 
3235
        if pidfile is not None:
 
3236
            pid = os.getpid()
 
3237
            try:
 
3238
                with pidfile:
 
3239
                    print(pid, file=pidfile)
 
3240
            except IOError:
 
3241
                logger.error("Could not write to file %r with PID %d",
 
3242
                             pidfilename, pid)
 
3243
        del pidfile
1920
3244
        del pidfilename
1921
 
        
1922
 
        signal.signal(signal.SIGINT, signal.SIG_IGN)
1923
 
 
1924
 
    signal.signal(signal.SIGHUP, lambda signum, frame: sys.exit())
1925
 
    signal.signal(signal.SIGTERM, lambda signum, frame: sys.exit())
1926
 
    
 
3245
 
 
3246
    for termsig in (signal.SIGHUP, signal.SIGTERM):
 
3247
        GLib.unix_signal_add(GLib.PRIORITY_HIGH, termsig,
 
3248
                             lambda: main_loop.quit() and False)
 
3249
 
1927
3250
    if use_dbus:
1928
 
        class MandosDBusService(dbus.service.Object):
 
3251
 
 
3252
        @alternate_dbus_interfaces(
 
3253
            {"se.recompile.Mandos": "se.bsnet.fukt.Mandos"})
 
3254
        class MandosDBusService(DBusObjectWithObjectManager):
1929
3255
            """A D-Bus proxy object"""
 
3256
 
1930
3257
            def __init__(self):
1931
3258
                dbus.service.Object.__init__(self, bus, "/")
1932
 
            _interface = "se.bsnet.fukt.Mandos"
1933
 
            
 
3259
 
 
3260
            _interface = "se.recompile.Mandos"
 
3261
 
1934
3262
            @dbus.service.signal(_interface, signature="o")
1935
3263
            def ClientAdded(self, objpath):
1936
3264
                "D-Bus signal"
1937
3265
                pass
1938
 
            
 
3266
 
1939
3267
            @dbus.service.signal(_interface, signature="ss")
1940
3268
            def ClientNotFound(self, fingerprint, address):
1941
3269
                "D-Bus signal"
1942
3270
                pass
1943
 
            
 
3271
 
 
3272
            @dbus_annotations({"org.freedesktop.DBus.Deprecated":
 
3273
                               "true"})
1944
3274
            @dbus.service.signal(_interface, signature="os")
1945
3275
            def ClientRemoved(self, objpath, name):
1946
3276
                "D-Bus signal"
1947
3277
                pass
1948
 
            
 
3278
 
 
3279
            @dbus_annotations({"org.freedesktop.DBus.Deprecated":
 
3280
                               "true"})
1949
3281
            @dbus.service.method(_interface, out_signature="ao")
1950
3282
            def GetAllClients(self):
1951
3283
                "D-Bus method"
1952
 
                return dbus.Array(c.dbus_object_path
1953
 
                                  for c in tcp_server.clients)
1954
 
            
 
3284
                return dbus.Array(c.dbus_object_path for c in
 
3285
                                  tcp_server.clients.values())
 
3286
 
 
3287
            @dbus_annotations({"org.freedesktop.DBus.Deprecated":
 
3288
                               "true"})
1955
3289
            @dbus.service.method(_interface,
1956
3290
                                 out_signature="a{oa{sv}}")
1957
3291
            def GetAllClientsWithProperties(self):
1958
3292
                "D-Bus method"
1959
3293
                return dbus.Dictionary(
1960
 
                    ((c.dbus_object_path, c.GetAll(""))
1961
 
                     for c in tcp_server.clients),
 
3294
                    {c.dbus_object_path: c.GetAll(
 
3295
                        "se.recompile.Mandos.Client")
 
3296
                     for c in tcp_server.clients.values()},
1962
3297
                    signature="oa{sv}")
1963
 
            
 
3298
 
1964
3299
            @dbus.service.method(_interface, in_signature="o")
1965
3300
            def RemoveClient(self, object_path):
1966
3301
                "D-Bus method"
1967
 
                for c in tcp_server.clients:
 
3302
                for c in tcp_server.clients.values():
1968
3303
                    if c.dbus_object_path == object_path:
1969
 
                        tcp_server.clients.remove(c)
 
3304
                        del tcp_server.clients[c.name]
1970
3305
                        c.remove_from_connection()
1971
 
                        # Don't signal anything except ClientRemoved
 
3306
                        # Don't signal the disabling
1972
3307
                        c.disable(quiet=True)
1973
 
                        # Emit D-Bus signal
1974
 
                        self.ClientRemoved(object_path, c.name)
 
3308
                        # Emit D-Bus signal for removal
 
3309
                        self.client_removed_signal(c)
1975
3310
                        return
1976
3311
                raise KeyError(object_path)
1977
 
            
 
3312
 
1978
3313
            del _interface
1979
 
        
 
3314
 
 
3315
            @dbus.service.method(dbus.OBJECT_MANAGER_IFACE,
 
3316
                                 out_signature="a{oa{sa{sv}}}")
 
3317
            def GetManagedObjects(self):
 
3318
                """D-Bus method"""
 
3319
                return dbus.Dictionary(
 
3320
                    {client.dbus_object_path:
 
3321
                     dbus.Dictionary(
 
3322
                         {interface: client.GetAll(interface)
 
3323
                          for interface in
 
3324
                          client._get_all_interface_names()})
 
3325
                     for client in tcp_server.clients.values()})
 
3326
 
 
3327
            def client_added_signal(self, client):
 
3328
                """Send the new standard signal and the old signal"""
 
3329
                if use_dbus:
 
3330
                    # New standard signal
 
3331
                    self.InterfacesAdded(
 
3332
                        client.dbus_object_path,
 
3333
                        dbus.Dictionary(
 
3334
                            {interface: client.GetAll(interface)
 
3335
                             for interface in
 
3336
                             client._get_all_interface_names()}))
 
3337
                    # Old signal
 
3338
                    self.ClientAdded(client.dbus_object_path)
 
3339
 
 
3340
            def client_removed_signal(self, client):
 
3341
                """Send the new standard signal and the old signal"""
 
3342
                if use_dbus:
 
3343
                    # New standard signal
 
3344
                    self.InterfacesRemoved(
 
3345
                        client.dbus_object_path,
 
3346
                        client._get_all_interface_names())
 
3347
                    # Old signal
 
3348
                    self.ClientRemoved(client.dbus_object_path,
 
3349
                                       client.name)
 
3350
 
1980
3351
        mandos_dbus_service = MandosDBusService()
1981
 
    
 
3352
 
 
3353
    # Save modules to variables to exempt the modules from being
 
3354
    # unloaded before the function registered with atexit() is run.
 
3355
    mp = multiprocessing
 
3356
    wn = wnull
 
3357
 
1982
3358
    def cleanup():
1983
3359
        "Cleanup function; run on exit"
1984
 
        service.cleanup()
1985
 
        
 
3360
        if zeroconf:
 
3361
            service.cleanup()
 
3362
 
 
3363
        mp.active_children()
 
3364
        wn.close()
 
3365
        if not (tcp_server.clients or client_settings):
 
3366
            return
 
3367
 
 
3368
        # Store client before exiting. Secrets are encrypted with key
 
3369
        # based on what config file has. If config file is
 
3370
        # removed/edited, old secret will thus be unrecovable.
 
3371
        clients = {}
 
3372
        with PGPEngine() as pgp:
 
3373
            for client in tcp_server.clients.values():
 
3374
                key = client_settings[client.name]["secret"]
 
3375
                client.encrypted_secret = pgp.encrypt(client.secret,
 
3376
                                                      key)
 
3377
                client_dict = {}
 
3378
 
 
3379
                # A list of attributes that can not be pickled
 
3380
                # + secret.
 
3381
                exclude = {"bus", "changedstate", "secret",
 
3382
                           "checker", "server_settings"}
 
3383
                for name, typ in inspect.getmembers(dbus.service
 
3384
                                                    .Object):
 
3385
                    exclude.add(name)
 
3386
 
 
3387
                client_dict["encrypted_secret"] = (client
 
3388
                                                   .encrypted_secret)
 
3389
                for attr in client.client_structure:
 
3390
                    if attr not in exclude:
 
3391
                        client_dict[attr] = getattr(client, attr)
 
3392
 
 
3393
                clients[client.name] = client_dict
 
3394
                del client_settings[client.name]["secret"]
 
3395
 
 
3396
        try:
 
3397
            with tempfile.NamedTemporaryFile(
 
3398
                    mode='wb',
 
3399
                    suffix=".pickle",
 
3400
                    prefix='clients-',
 
3401
                    dir=os.path.dirname(stored_state_path),
 
3402
                    delete=False) as stored_state:
 
3403
                pickle.dump((clients, client_settings), stored_state,
 
3404
                            protocol=2)
 
3405
                tempname = stored_state.name
 
3406
            os.rename(tempname, stored_state_path)
 
3407
        except (IOError, OSError) as e:
 
3408
            if not debug:
 
3409
                try:
 
3410
                    os.remove(tempname)
 
3411
                except NameError:
 
3412
                    pass
 
3413
            if e.errno in (errno.ENOENT, errno.EACCES, errno.EEXIST):
 
3414
                logger.warning("Could not save persistent state: {}"
 
3415
                               .format(os.strerror(e.errno)))
 
3416
            else:
 
3417
                logger.warning("Could not save persistent state:",
 
3418
                               exc_info=e)
 
3419
                raise
 
3420
 
 
3421
        # Delete all clients, and settings from config
1986
3422
        while tcp_server.clients:
1987
 
            client = tcp_server.clients.pop()
 
3423
            name, client = tcp_server.clients.popitem()
1988
3424
            if use_dbus:
1989
3425
                client.remove_from_connection()
1990
 
            client.disable_hook = None
1991
 
            # Don't signal anything except ClientRemoved
 
3426
            # Don't signal the disabling
1992
3427
            client.disable(quiet=True)
 
3428
            # Emit D-Bus signal for removal
1993
3429
            if use_dbus:
1994
 
                # Emit D-Bus signal
1995
 
                mandos_dbus_service.ClientRemoved(client.dbus_object_path,
1996
 
                                                  client.name)
1997
 
    
 
3430
                mandos_dbus_service.client_removed_signal(client)
 
3431
        client_settings.clear()
 
3432
 
1998
3433
    atexit.register(cleanup)
1999
 
    
2000
 
    for client in tcp_server.clients:
 
3434
 
 
3435
    for client in tcp_server.clients.values():
2001
3436
        if use_dbus:
2002
 
            # Emit D-Bus signal
2003
 
            mandos_dbus_service.ClientAdded(client.dbus_object_path)
2004
 
        client.enable()
2005
 
    
 
3437
            # Emit D-Bus signal for adding
 
3438
            mandos_dbus_service.client_added_signal(client)
 
3439
        # Need to initiate checking of clients
 
3440
        if client.enabled:
 
3441
            client.init_checker()
 
3442
 
2006
3443
    tcp_server.enable()
2007
3444
    tcp_server.server_activate()
2008
 
    
 
3445
 
2009
3446
    # Find out what port we got
2010
 
    service.port = tcp_server.socket.getsockname()[1]
 
3447
    if zeroconf:
 
3448
        service.port = tcp_server.socket.getsockname()[1]
2011
3449
    if use_ipv6:
2012
3450
        logger.info("Now listening on address %r, port %d,"
2013
 
                    " flowinfo %d, scope_id %d"
2014
 
                    % tcp_server.socket.getsockname())
 
3451
                    " flowinfo %d, scope_id %d",
 
3452
                    *tcp_server.socket.getsockname())
2015
3453
    else:                       # IPv4
2016
 
        logger.info("Now listening on address %r, port %d"
2017
 
                    % tcp_server.socket.getsockname())
2018
 
    
2019
 
    #service.interface = tcp_server.socket.getsockname()[3]
2020
 
    
 
3454
        logger.info("Now listening on address %r, port %d",
 
3455
                    *tcp_server.socket.getsockname())
 
3456
 
 
3457
    # service.interface = tcp_server.socket.getsockname()[3]
 
3458
 
2021
3459
    try:
2022
 
        # From the Avahi example code
2023
 
        try:
2024
 
            service.activate()
2025
 
        except dbus.exceptions.DBusException, error:
2026
 
            logger.critical("DBusException: %s", error)
2027
 
            cleanup()
2028
 
            sys.exit(1)
2029
 
        # End of Avahi example code
2030
 
        
2031
 
        gobject.io_add_watch(tcp_server.fileno(), gobject.IO_IN,
2032
 
                             lambda *args, **kwargs:
2033
 
                             (tcp_server.handle_request
2034
 
                              (*args[2:], **kwargs) or True))
2035
 
        
 
3460
        if zeroconf:
 
3461
            # From the Avahi example code
 
3462
            try:
 
3463
                service.activate()
 
3464
            except dbus.exceptions.DBusException as error:
 
3465
                logger.critical("D-Bus Exception", exc_info=error)
 
3466
                cleanup()
 
3467
                sys.exit(1)
 
3468
            # End of Avahi example code
 
3469
 
 
3470
        GLib.io_add_watch(tcp_server.fileno(), GLib.IO_IN,
 
3471
                          lambda *args, **kwargs:
 
3472
                          (tcp_server.handle_request
 
3473
                           (*args[2:], **kwargs) or True))
 
3474
 
2036
3475
        logger.debug("Starting main loop")
2037
3476
        main_loop.run()
2038
 
    except AvahiError, error:
2039
 
        logger.critical("AvahiError: %s", error)
 
3477
    except AvahiError as error:
 
3478
        logger.critical("Avahi Error", exc_info=error)
2040
3479
        cleanup()
2041
3480
        sys.exit(1)
2042
3481
    except KeyboardInterrupt:
2047
3486
    # Must run before the D-Bus bus name gets deregistered
2048
3487
    cleanup()
2049
3488
 
 
3489
 
2050
3490
if __name__ == '__main__':
2051
3491
    main()