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working new feature: network-hooks - Enables user-scripts to take up
                     interfaces during bootup

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Lines of Context:
mandos
1
1
#!/usr/bin/python
2
2
# -*- mode: python; coding: utf-8 -*-
3
 
#
 
3
# 
4
4
# Mandos server - give out binary blobs to connecting clients.
5
 
#
 
5
# 
6
6
# This program is partly derived from an example program for an Avahi
7
7
# service publisher, downloaded from
8
8
# <http://avahi.org/wiki/PythonPublishExample>.  This includes the
9
9
# methods "add", "remove", "server_state_changed",
10
10
# "entry_group_state_changed", "cleanup", and "activate" in the
11
11
# "AvahiService" class, and some lines in "main".
12
 
#
 
12
# 
13
13
# Everything else is
14
 
# Copyright © 2008-2018 Teddy Hogeborn
15
 
# Copyright © 2008-2018 Björn Påhlsson
16
 
#
17
 
# This file is part of Mandos.
18
 
#
19
 
# Mandos is free software: you can redistribute it and/or modify it
20
 
# under the terms of the GNU General Public License as published by
 
14
# Copyright © 2008-2011 Teddy Hogeborn
 
15
# Copyright © 2008-2011 Björn Påhlsson
 
16
# 
 
17
# This program is free software: you can redistribute it and/or modify
 
18
# it under the terms of the GNU General Public License as published by
21
19
# the Free Software Foundation, either version 3 of the License, or
22
20
# (at your option) any later version.
23
21
#
24
 
#     Mandos is distributed in the hope that it will be useful, but
25
 
#     WITHOUT ANY WARRANTY; without even the implied warranty of
 
22
#     This program is distributed in the hope that it will be useful,
 
23
#     but WITHOUT ANY WARRANTY; without even the implied warranty of
26
24
#     MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
27
25
#     GNU General Public License for more details.
28
 
#
 
26
# 
29
27
# You should have received a copy of the GNU General Public License
30
 
# along with Mandos.  If not, see <http://www.gnu.org/licenses/>.
31
 
#
 
28
# along with this program.  If not, see
 
29
# <http://www.gnu.org/licenses/>.
 
30
# 
32
31
# Contact the authors at <mandos@recompile.se>.
33
 
#
 
32
# 
34
33
 
35
34
from __future__ import (division, absolute_import, print_function,
36
35
                        unicode_literals)
37
36
 
38
 
try:
39
 
    from future_builtins import *
40
 
except ImportError:
41
 
    pass
42
 
 
43
 
try:
44
 
    import SocketServer as socketserver
45
 
except ImportError:
46
 
    import socketserver
 
37
import SocketServer as socketserver
47
38
import socket
48
39
import argparse
49
40
import datetime
50
41
import errno
51
 
try:
52
 
    import ConfigParser as configparser
53
 
except ImportError:
54
 
    import configparser
 
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
55
49
import sys
56
50
import re
57
51
import os
66
60
import struct
67
61
import fcntl
68
62
import functools
69
 
try:
70
 
    import cPickle as pickle
71
 
except ImportError:
72
 
    import pickle
 
63
import cPickle as pickle
73
64
import multiprocessing
74
65
import types
75
66
import binascii
76
67
import tempfile
77
 
import itertools
78
 
import collections
79
 
import codecs
80
68
 
81
69
import dbus
82
70
import dbus.service
83
 
from gi.repository import GLib
 
71
import gobject
 
72
import avahi
84
73
from dbus.mainloop.glib import DBusGMainLoop
85
74
import ctypes
86
75
import ctypes.util
87
76
import xml.dom.minidom
88
77
import inspect
 
78
import GnuPGInterface
89
79
 
90
 
# Try to find the value of SO_BINDTODEVICE:
91
80
try:
92
 
    # This is where SO_BINDTODEVICE is in Python 3.3 (or 3.4?) and
93
 
    # newer, and it is also the most natural place for it:
94
81
    SO_BINDTODEVICE = socket.SO_BINDTODEVICE
95
82
except AttributeError:
96
83
    try:
97
 
        # This is where SO_BINDTODEVICE was up to and including Python
98
 
        # 2.6, and also 3.2:
99
84
        from IN import SO_BINDTODEVICE
100
85
    except ImportError:
101
 
        # In Python 2.7 it seems to have been removed entirely.
102
 
        # Try running the C preprocessor:
103
 
        try:
104
 
            cc = subprocess.Popen(["cc", "--language=c", "-E",
105
 
                                   "/dev/stdin"],
106
 
                                  stdin=subprocess.PIPE,
107
 
                                  stdout=subprocess.PIPE)
108
 
            stdout = cc.communicate(
109
 
                "#include <sys/socket.h>\nSO_BINDTODEVICE\n")[0]
110
 
            SO_BINDTODEVICE = int(stdout.splitlines()[-1])
111
 
        except (OSError, ValueError, IndexError):
112
 
            # No value found
113
 
            SO_BINDTODEVICE = None
114
 
 
115
 
if sys.version_info.major == 2:
116
 
    str = unicode
117
 
 
118
 
version = "1.7.19"
 
86
        SO_BINDTODEVICE = None
 
87
 
 
88
version = "1.4.1"
119
89
stored_state_file = "clients.pickle"
120
90
 
121
91
logger = logging.getLogger()
122
 
syslogger = None
 
92
syslogger = (logging.handlers.SysLogHandler
 
93
             (facility = logging.handlers.SysLogHandler.LOG_DAEMON,
 
94
              address = str("/dev/log")))
123
95
 
124
96
try:
125
 
    if_nametoindex = ctypes.cdll.LoadLibrary(
126
 
        ctypes.util.find_library("c")).if_nametoindex
 
97
    if_nametoindex = (ctypes.cdll.LoadLibrary
 
98
                      (ctypes.util.find_library("c"))
 
99
                      .if_nametoindex)
127
100
except (OSError, AttributeError):
128
 
 
129
101
    def if_nametoindex(interface):
130
102
        "Get an interface index the hard way, i.e. using fcntl()"
131
103
        SIOCGIFINDEX = 0x8933  # From /usr/include/linux/sockios.h
132
104
        with contextlib.closing(socket.socket()) as s:
133
105
            ifreq = fcntl.ioctl(s, SIOCGIFINDEX,
134
 
                                struct.pack(b"16s16x", interface))
135
 
        interface_index = struct.unpack("I", ifreq[16:20])[0]
 
106
                                struct.pack(str("16s16x"),
 
107
                                            interface))
 
108
        interface_index = struct.unpack(str("I"),
 
109
                                        ifreq[16:20])[0]
136
110
        return interface_index
137
111
 
138
112
 
139
 
def copy_function(func):
140
 
    """Make a copy of a function"""
141
 
    if sys.version_info.major == 2:
142
 
        return types.FunctionType(func.func_code,
143
 
                                  func.func_globals,
144
 
                                  func.func_name,
145
 
                                  func.func_defaults,
146
 
                                  func.func_closure)
147
 
    else:
148
 
        return types.FunctionType(func.__code__,
149
 
                                  func.__globals__,
150
 
                                  func.__name__,
151
 
                                  func.__defaults__,
152
 
                                  func.__closure__)
153
 
 
154
 
 
155
 
def initlogger(debug, level=logging.WARNING):
 
113
def initlogger(level=logging.WARNING):
156
114
    """init logger and add loglevel"""
157
 
 
158
 
    global syslogger
159
 
    syslogger = (logging.handlers.SysLogHandler(
160
 
        facility=logging.handlers.SysLogHandler.LOG_DAEMON,
161
 
        address="/dev/log"))
 
115
    
162
116
    syslogger.setFormatter(logging.Formatter
163
117
                           ('Mandos [%(process)d]: %(levelname)s:'
164
118
                            ' %(message)s'))
165
119
    logger.addHandler(syslogger)
166
 
 
167
 
    if debug:
168
 
        console = logging.StreamHandler()
169
 
        console.setFormatter(logging.Formatter('%(asctime)s %(name)s'
170
 
                                               ' [%(process)d]:'
171
 
                                               ' %(levelname)s:'
172
 
                                               ' %(message)s'))
173
 
        logger.addHandler(console)
 
120
    
 
121
    console = logging.StreamHandler()
 
122
    console.setFormatter(logging.Formatter('%(asctime)s %(name)s'
 
123
                                           ' [%(process)d]:'
 
124
                                           ' %(levelname)s:'
 
125
                                           ' %(message)s'))
 
126
    logger.addHandler(console)
174
127
    logger.setLevel(level)
175
128
 
176
129
 
181
134
 
182
135
class PGPEngine(object):
183
136
    """A simple class for OpenPGP symmetric encryption & decryption"""
184
 
 
185
137
    def __init__(self):
 
138
        self.gnupg = GnuPGInterface.GnuPG()
186
139
        self.tempdir = tempfile.mkdtemp(prefix="mandos-")
187
 
        self.gpg = "gpg"
188
 
        try:
189
 
            output = subprocess.check_output(["gpgconf"])
190
 
            for line in output.splitlines():
191
 
                name, text, path = line.split(b":")
192
 
                if name == "gpg":
193
 
                    self.gpg = path
194
 
                    break
195
 
        except OSError as e:
196
 
            if e.errno != errno.ENOENT:
197
 
                raise
198
 
        self.gnupgargs = ['--batch',
199
 
                          '--homedir', self.tempdir,
200
 
                          '--force-mdc',
201
 
                          '--quiet']
202
 
        # Only GPG version 1 has the --no-use-agent option.
203
 
        if self.gpg == "gpg" or self.gpg.endswith("/gpg"):
204
 
            self.gnupgargs.append("--no-use-agent")
205
 
 
 
140
        self.gnupg = GnuPGInterface.GnuPG()
 
141
        self.gnupg.options.meta_interactive = False
 
142
        self.gnupg.options.homedir = self.tempdir
 
143
        self.gnupg.options.extra_args.extend(['--force-mdc',
 
144
                                              '--quiet'])
 
145
    
206
146
    def __enter__(self):
207
147
        return self
208
 
 
209
 
    def __exit__(self, exc_type, exc_value, traceback):
 
148
    
 
149
    def __exit__ (self, exc_type, exc_value, traceback):
210
150
        self._cleanup()
211
151
        return False
212
 
 
 
152
    
213
153
    def __del__(self):
214
154
        self._cleanup()
215
 
 
 
155
    
216
156
    def _cleanup(self):
217
157
        if self.tempdir is not None:
218
158
            # Delete contents of tempdir
219
159
            for root, dirs, files in os.walk(self.tempdir,
220
 
                                             topdown=False):
 
160
                                             topdown = False):
221
161
                for filename in files:
222
162
                    os.remove(os.path.join(root, filename))
223
163
                for dirname in dirs:
225
165
            # Remove tempdir
226
166
            os.rmdir(self.tempdir)
227
167
            self.tempdir = None
228
 
 
 
168
    
229
169
    def password_encode(self, password):
230
170
        # Passphrase can not be empty and can not contain newlines or
231
171
        # NUL bytes.  So we prefix it and hex encode it.
232
 
        encoded = b"mandos" + binascii.hexlify(password)
233
 
        if len(encoded) > 2048:
234
 
            # GnuPG can't handle long passwords, so encode differently
235
 
            encoded = (b"mandos" + password.replace(b"\\", b"\\\\")
236
 
                       .replace(b"\n", b"\\n")
237
 
                       .replace(b"\0", b"\\x00"))
238
 
        return encoded
239
 
 
 
172
        return b"mandos" + binascii.hexlify(password)
 
173
    
240
174
    def encrypt(self, data, password):
241
 
        passphrase = self.password_encode(password)
242
 
        with tempfile.NamedTemporaryFile(
243
 
                dir=self.tempdir) as passfile:
244
 
            passfile.write(passphrase)
245
 
            passfile.flush()
246
 
            proc = subprocess.Popen([self.gpg, '--symmetric',
247
 
                                     '--passphrase-file',
248
 
                                     passfile.name]
249
 
                                    + self.gnupgargs,
250
 
                                    stdin=subprocess.PIPE,
251
 
                                    stdout=subprocess.PIPE,
252
 
                                    stderr=subprocess.PIPE)
253
 
            ciphertext, err = proc.communicate(input=data)
254
 
        if proc.returncode != 0:
255
 
            raise PGPError(err)
 
175
        self.gnupg.passphrase = self.password_encode(password)
 
176
        with open(os.devnull) as devnull:
 
177
            try:
 
178
                proc = self.gnupg.run(['--symmetric'],
 
179
                                      create_fhs=['stdin', 'stdout'],
 
180
                                      attach_fhs={'stderr': devnull})
 
181
                with contextlib.closing(proc.handles['stdin']) as f:
 
182
                    f.write(data)
 
183
                with contextlib.closing(proc.handles['stdout']) as f:
 
184
                    ciphertext = f.read()
 
185
                proc.wait()
 
186
            except IOError as e:
 
187
                raise PGPError(e)
 
188
        self.gnupg.passphrase = None
256
189
        return ciphertext
257
 
 
 
190
    
258
191
    def decrypt(self, data, password):
259
 
        passphrase = self.password_encode(password)
260
 
        with tempfile.NamedTemporaryFile(
261
 
                dir=self.tempdir) as passfile:
262
 
            passfile.write(passphrase)
263
 
            passfile.flush()
264
 
            proc = subprocess.Popen([self.gpg, '--decrypt',
265
 
                                     '--passphrase-file',
266
 
                                     passfile.name]
267
 
                                    + self.gnupgargs,
268
 
                                    stdin=subprocess.PIPE,
269
 
                                    stdout=subprocess.PIPE,
270
 
                                    stderr=subprocess.PIPE)
271
 
            decrypted_plaintext, err = proc.communicate(input=data)
272
 
        if proc.returncode != 0:
273
 
            raise PGPError(err)
 
192
        self.gnupg.passphrase = self.password_encode(password)
 
193
        with open(os.devnull) as devnull:
 
194
            try:
 
195
                proc = self.gnupg.run(['--decrypt'],
 
196
                                      create_fhs=['stdin', 'stdout'],
 
197
                                      attach_fhs={'stderr': devnull})
 
198
                with contextlib.closing(proc.handles['stdin'] ) as f:
 
199
                    f.write(data)
 
200
                with contextlib.closing(proc.handles['stdout']) as f:
 
201
                    decrypted_plaintext = f.read()
 
202
                proc.wait()
 
203
            except IOError as e:
 
204
                raise PGPError(e)
 
205
        self.gnupg.passphrase = None
274
206
        return decrypted_plaintext
275
207
 
276
208
 
277
 
# Pretend that we have an Avahi module
278
 
class Avahi(object):
279
 
    """This isn't so much a class as it is a module-like namespace.
280
 
    It is instantiated once, and simulates having an Avahi module."""
281
 
    IF_UNSPEC = -1               # avahi-common/address.h
282
 
    PROTO_UNSPEC = -1            # avahi-common/address.h
283
 
    PROTO_INET = 0               # avahi-common/address.h
284
 
    PROTO_INET6 = 1              # avahi-common/address.h
285
 
    DBUS_NAME = "org.freedesktop.Avahi"
286
 
    DBUS_INTERFACE_ENTRY_GROUP = DBUS_NAME + ".EntryGroup"
287
 
    DBUS_INTERFACE_SERVER = DBUS_NAME + ".Server"
288
 
    DBUS_PATH_SERVER = "/"
289
 
 
290
 
    def string_array_to_txt_array(self, t):
291
 
        return dbus.Array((dbus.ByteArray(s.encode("utf-8"))
292
 
                           for s in t), signature="ay")
293
 
    ENTRY_GROUP_ESTABLISHED = 2  # avahi-common/defs.h
294
 
    ENTRY_GROUP_COLLISION = 3    # avahi-common/defs.h
295
 
    ENTRY_GROUP_FAILURE = 4      # avahi-common/defs.h
296
 
    SERVER_INVALID = 0           # avahi-common/defs.h
297
 
    SERVER_REGISTERING = 1       # avahi-common/defs.h
298
 
    SERVER_RUNNING = 2           # avahi-common/defs.h
299
 
    SERVER_COLLISION = 3         # avahi-common/defs.h
300
 
    SERVER_FAILURE = 4           # avahi-common/defs.h
301
 
avahi = Avahi()
302
 
 
303
209
 
304
210
class AvahiError(Exception):
305
211
    def __init__(self, value, *args, **kwargs):
306
212
        self.value = value
307
 
        return super(AvahiError, self).__init__(value, *args,
308
 
                                                **kwargs)
309
 
 
 
213
        super(AvahiError, self).__init__(value, *args, **kwargs)
 
214
    def __unicode__(self):
 
215
        return unicode(repr(self.value))
310
216
 
311
217
class AvahiServiceError(AvahiError):
312
218
    pass
313
219
 
314
 
 
315
220
class AvahiGroupError(AvahiError):
316
221
    pass
317
222
 
318
223
 
319
224
class AvahiService(object):
320
225
    """An Avahi (Zeroconf) service.
321
 
 
 
226
    
322
227
    Attributes:
323
228
    interface: integer; avahi.IF_UNSPEC or an interface index.
324
229
               Used to optionally bind to the specified interface.
325
230
    name: string; Example: 'Mandos'
326
231
    type: string; Example: '_mandos._tcp'.
327
 
     See <https://www.iana.org/assignments/service-names-port-numbers>
 
232
                  See <http://www.dns-sd.org/ServiceTypes.html>
328
233
    port: integer; what port to announce
329
234
    TXT: list of strings; TXT record for the service
330
235
    domain: string; Domain to publish on, default to .local if empty.
336
241
    server: D-Bus Server
337
242
    bus: dbus.SystemBus()
338
243
    """
339
 
 
340
 
    def __init__(self,
341
 
                 interface=avahi.IF_UNSPEC,
342
 
                 name=None,
343
 
                 servicetype=None,
344
 
                 port=None,
345
 
                 TXT=None,
346
 
                 domain="",
347
 
                 host="",
348
 
                 max_renames=32768,
349
 
                 protocol=avahi.PROTO_UNSPEC,
350
 
                 bus=None):
 
244
    def __init__(self, interface = avahi.IF_UNSPEC, name = None,
 
245
                 servicetype = None, port = None, TXT = None,
 
246
                 domain = "", host = "", max_renames = 32768,
 
247
                 protocol = avahi.PROTO_UNSPEC, bus = None):
351
248
        self.interface = interface
352
249
        self.name = name
353
250
        self.type = servicetype
362
259
        self.server = None
363
260
        self.bus = bus
364
261
        self.entry_group_state_changed_match = None
365
 
 
366
 
    def rename(self, remove=True):
 
262
    def rename(self):
367
263
        """Derived from the Avahi example code"""
368
264
        if self.rename_count >= self.max_renames:
369
265
            logger.critical("No suitable Zeroconf service name found"
370
266
                            " after %i retries, exiting.",
371
267
                            self.rename_count)
372
268
            raise AvahiServiceError("Too many renames")
373
 
        self.name = str(
374
 
            self.server.GetAlternativeServiceName(self.name))
375
 
        self.rename_count += 1
 
269
        self.name = unicode(self.server
 
270
                            .GetAlternativeServiceName(self.name))
376
271
        logger.info("Changing Zeroconf service name to %r ...",
377
272
                    self.name)
378
 
        if remove:
379
 
            self.remove()
 
273
        self.remove()
380
274
        try:
381
275
            self.add()
382
276
        except dbus.exceptions.DBusException as error:
383
 
            if (error.get_dbus_name()
384
 
                == "org.freedesktop.Avahi.CollisionError"):
385
 
                logger.info("Local Zeroconf service name collision.")
386
 
                return self.rename(remove=False)
387
 
            else:
388
 
                logger.critical("D-Bus Exception", exc_info=error)
389
 
                self.cleanup()
390
 
                os._exit(1)
391
 
 
 
277
            logger.critical("DBusException: %s", error)
 
278
            self.cleanup()
 
279
            os._exit(1)
 
280
        self.rename_count += 1
392
281
    def remove(self):
393
282
        """Derived from the Avahi example code"""
394
283
        if self.entry_group_state_changed_match is not None:
396
285
            self.entry_group_state_changed_match = None
397
286
        if self.group is not None:
398
287
            self.group.Reset()
399
 
 
400
288
    def add(self):
401
289
        """Derived from the Avahi example code"""
402
290
        self.remove()
419
307
            dbus.UInt16(self.port),
420
308
            avahi.string_array_to_txt_array(self.TXT))
421
309
        self.group.Commit()
422
 
 
423
310
    def entry_group_state_changed(self, state, error):
424
311
        """Derived from the Avahi example code"""
425
312
        logger.debug("Avahi entry group state change: %i", state)
426
 
 
 
313
        
427
314
        if state == avahi.ENTRY_GROUP_ESTABLISHED:
428
315
            logger.debug("Zeroconf service established.")
429
316
        elif state == avahi.ENTRY_GROUP_COLLISION:
431
318
            self.rename()
432
319
        elif state == avahi.ENTRY_GROUP_FAILURE:
433
320
            logger.critical("Avahi: Error in group state changed %s",
434
 
                            str(error))
435
 
            raise AvahiGroupError("State changed: {!s}".format(error))
436
 
 
 
321
                            unicode(error))
 
322
            raise AvahiGroupError("State changed: %s"
 
323
                                  % unicode(error))
437
324
    def cleanup(self):
438
325
        """Derived from the Avahi example code"""
439
326
        if self.group is not None:
444
331
                pass
445
332
            self.group = None
446
333
        self.remove()
447
 
 
448
334
    def server_state_changed(self, state, error=None):
449
335
        """Derived from the Avahi example code"""
450
336
        logger.debug("Avahi server state change: %i", state)
451
 
        bad_states = {
452
 
            avahi.SERVER_INVALID: "Zeroconf server invalid",
453
 
            avahi.SERVER_REGISTERING: None,
454
 
            avahi.SERVER_COLLISION: "Zeroconf server name collision",
455
 
            avahi.SERVER_FAILURE: "Zeroconf server failure",
456
 
        }
 
337
        bad_states = { avahi.SERVER_INVALID:
 
338
                           "Zeroconf server invalid",
 
339
                       avahi.SERVER_REGISTERING: None,
 
340
                       avahi.SERVER_COLLISION:
 
341
                           "Zeroconf server name collision",
 
342
                       avahi.SERVER_FAILURE:
 
343
                           "Zeroconf server failure" }
457
344
        if state in bad_states:
458
345
            if bad_states[state] is not None:
459
346
                if error is None:
462
349
                    logger.error(bad_states[state] + ": %r", error)
463
350
            self.cleanup()
464
351
        elif state == avahi.SERVER_RUNNING:
465
 
            try:
466
 
                self.add()
467
 
            except dbus.exceptions.DBusException as error:
468
 
                if (error.get_dbus_name()
469
 
                    == "org.freedesktop.Avahi.CollisionError"):
470
 
                    logger.info("Local Zeroconf service name"
471
 
                                " collision.")
472
 
                    return self.rename(remove=False)
473
 
                else:
474
 
                    logger.critical("D-Bus Exception", exc_info=error)
475
 
                    self.cleanup()
476
 
                    os._exit(1)
 
352
            self.add()
477
353
        else:
478
354
            if error is None:
479
355
                logger.debug("Unknown state: %r", state)
480
356
            else:
481
357
                logger.debug("Unknown state: %r: %r", state, error)
482
 
 
483
358
    def activate(self):
484
359
        """Derived from the Avahi example code"""
485
360
        if self.server is None:
489
364
                                    follow_name_owner_changes=True),
490
365
                avahi.DBUS_INTERFACE_SERVER)
491
366
        self.server.connect_to_signal("StateChanged",
492
 
                                      self.server_state_changed)
 
367
                                 self.server_state_changed)
493
368
        self.server_state_changed(self.server.GetState())
494
369
 
495
 
 
496
370
class AvahiServiceToSyslog(AvahiService):
497
 
    def rename(self, *args, **kwargs):
 
371
    def rename(self):
498
372
        """Add the new name to the syslog messages"""
499
 
        ret = super(AvahiServiceToSyslog, self).rename(*args, **kwargs)
500
 
        syslogger.setFormatter(logging.Formatter(
501
 
            'Mandos ({}) [%(process)d]: %(levelname)s: %(message)s'
502
 
            .format(self.name)))
 
373
        ret = AvahiService.rename(self)
 
374
        syslogger.setFormatter(logging.Formatter
 
375
                               ('Mandos (%s) [%%(process)d]:'
 
376
                                ' %%(levelname)s: %%(message)s'
 
377
                                % self.name))
503
378
        return ret
504
379
 
505
 
 
506
 
# Pretend that we have a GnuTLS module
507
 
class GnuTLS(object):
508
 
    """This isn't so much a class as it is a module-like namespace.
509
 
    It is instantiated once, and simulates having a GnuTLS module."""
510
 
 
511
 
    library = ctypes.util.find_library("gnutls")
512
 
    if library is None:
513
 
        library = ctypes.util.find_library("gnutls-deb0")
514
 
    _library = ctypes.cdll.LoadLibrary(library)
515
 
    del library
516
 
    _need_version = b"3.3.0"
517
 
 
518
 
    def __init__(self):
519
 
        # Need to use "self" here, since this method is called before
520
 
        # the assignment to the "gnutls" global variable happens.
521
 
        if self.check_version(self._need_version) is None:
522
 
            raise self.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
 
 
 
380
def timedelta_to_milliseconds(td):
 
381
    "Convert a datetime.timedelta() to milliseconds"
 
382
    return ((td.days * 24 * 60 * 60 * 1000)
 
383
            + (td.seconds * 1000)
 
384
            + (td.microseconds // 1000))
 
385
        
780
386
class Client(object):
781
387
    """A representation of a client host served by this server.
782
 
 
 
388
    
783
389
    Attributes:
784
390
    approved:   bool(); 'None' if not yet approved/disapproved
785
391
    approval_delay: datetime.timedelta(); Time to wait for approval
787
393
    checker:    subprocess.Popen(); a running checker process used
788
394
                                    to see if the client lives.
789
395
                                    'None' if no process is running.
790
 
    checker_callback_tag: a GLib event source tag, or None
 
396
    checker_callback_tag: a gobject event source tag, or None
791
397
    checker_command: string; External command which is run to check
792
398
                     if client lives.  %() expansions are done at
793
399
                     runtime with vars(self) as dict, so that for
794
400
                     instance %(name)s can be used in the command.
795
 
    checker_initiator_tag: a GLib event source tag, or None
 
401
    checker_initiator_tag: a gobject event source tag, or None
796
402
    created:    datetime.datetime(); (UTC) object creation
797
403
    client_structure: Object describing what attributes a client has
798
404
                      and is used for storing the client at exit
799
405
    current_checker_command: string; current running checker_command
800
 
    disable_initiator_tag: a GLib event source tag, or None
 
406
    disable_initiator_tag: a gobject event source tag, or None
801
407
    enabled:    bool()
802
408
    fingerprint: string (40 or 32 hexadecimal digits); used to
803
409
                 uniquely identify the client
807
413
    last_checked_ok: datetime.datetime(); (UTC) or None
808
414
    last_checker_status: integer between 0 and 255 reflecting exit
809
415
                         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
 
416
                         checker, or None.
813
417
    last_enabled: datetime.datetime(); (UTC) or None
814
418
    name:       string; from the config file, used in log messages and
815
419
                        D-Bus identifiers
816
420
    secret:     bytestring; sent verbatim (over TLS) to client
817
421
    timeout:    datetime.timedelta(); How long from last_checked_ok
818
422
                                      until this client is disabled
819
 
    extended_timeout:   extra long timeout when secret has been sent
 
423
    extended_timeout:   extra long timeout when password has been sent
820
424
    runtime_expansions: Allowed attributes for runtime expansion.
821
425
    expires:    datetime.datetime(); time (UTC) when a client will be
822
426
                disabled, or None
823
 
    server_settings: The server_settings dict from main()
824
427
    """
825
 
 
 
428
    
826
429
    runtime_expansions = ("approval_delay", "approval_duration",
827
 
                          "created", "enabled", "expires",
828
 
                          "fingerprint", "host", "interval",
829
 
                          "last_approval_request", "last_checked_ok",
 
430
                          "created", "enabled", "fingerprint",
 
431
                          "host", "interval", "last_checked_ok",
830
432
                          "last_enabled", "name", "timeout")
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
 
    }
 
433
    client_defaults = { "timeout": "5m",
 
434
                        "extended_timeout": "15m",
 
435
                        "interval": "2m",
 
436
                        "checker": "fping -q -- %%(host)s",
 
437
                        "host": "",
 
438
                        "approval_delay": "0s",
 
439
                        "approval_duration": "1s",
 
440
                        "approved_by_default": "True",
 
441
                        "enabled": "True",
 
442
                        }
 
443
    
 
444
    def timeout_milliseconds(self):
 
445
        "Return the 'timeout' attribute in milliseconds"
 
446
        return timedelta_to_milliseconds(self.timeout)
 
447
    
 
448
    def extended_timeout_milliseconds(self):
 
449
        "Return the 'extended_timeout' attribute in milliseconds"
 
450
        return timedelta_to_milliseconds(self.extended_timeout)
 
451
    
 
452
    def interval_milliseconds(self):
 
453
        "Return the 'interval' attribute in milliseconds"
 
454
        return timedelta_to_milliseconds(self.interval)
 
455
    
 
456
    def approval_delay_milliseconds(self):
 
457
        return timedelta_to_milliseconds(self.approval_delay)
842
458
 
843
459
    @staticmethod
844
460
    def config_parser(config):
845
 
        """Construct a new dict of client settings of this form:
 
461
        """ Construct a new dict of client settings of this form:
846
462
        { 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
 
        """
 
463
        with exceptions for any special settings as defined above"""
851
464
        settings = {}
852
465
        for client_name in config.sections():
853
466
            section = dict(config.items(client_name))
854
467
            client = settings[client_name] = {}
855
 
 
 
468
            
856
469
            client["host"] = section["host"]
857
470
            # Reformat values from string types to Python types
858
471
            client["approved_by_default"] = config.getboolean(
859
472
                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
 
473
            client["enabled"] = config.getboolean(client_name, "enabled")
 
474
            
866
475
            client["fingerprint"] = (section["fingerprint"].upper()
867
476
                                     .replace(" ", ""))
868
477
            if "secret" in section:
869
 
                client["secret"] = codecs.decode(section["secret"]
870
 
                                                 .encode("utf-8"),
871
 
                                                 "base64")
 
478
                client["secret"] = section["secret"].decode("base64")
872
479
            elif "secfile" in section:
873
480
                with open(os.path.expanduser(os.path.expandvars
874
481
                                             (section["secfile"])),
875
482
                          "rb") as secfile:
876
483
                    client["secret"] = secfile.read()
877
484
            else:
878
 
                raise TypeError("No secret or secfile for section {}"
879
 
                                .format(section))
 
485
                raise TypeError("No secret or secfile for section %s"
 
486
                                % section)
880
487
            client["timeout"] = string_to_delta(section["timeout"])
881
488
            client["extended_timeout"] = string_to_delta(
882
489
                section["extended_timeout"])
888
495
            client["checker_command"] = section["checker"]
889
496
            client["last_approval_request"] = None
890
497
            client["last_checked_ok"] = None
891
 
            client["last_checker_status"] = -2
 
498
            client["last_checker_status"] = None
 
499
            if client["enabled"]:
 
500
                client["last_enabled"] = datetime.datetime.utcnow()
 
501
                client["expires"] = (datetime.datetime.utcnow()
 
502
                                     + client["timeout"])
 
503
            else:
 
504
                client["last_enabled"] = None
 
505
                client["expires"] = None
892
506
 
893
507
        return settings
894
 
 
895
 
    def __init__(self, settings, name=None, server_settings=None):
 
508
        
 
509
        
 
510
    def __init__(self, settings, name = None):
 
511
        """Note: the 'checker' key in 'config' sets the
 
512
        'checker_command' attribute and *not* the 'checker'
 
513
        attribute."""
896
514
        self.name = name
897
 
        if server_settings is None:
898
 
            server_settings = {}
899
 
        self.server_settings = server_settings
900
515
        # adding all client settings
901
 
        for setting, value in settings.items():
 
516
        for setting, value in settings.iteritems():
902
517
            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
 
 
 
518
        
914
519
        logger.debug("Creating client %r", self.name)
 
520
        # Uppercase and remove spaces from fingerprint for later
 
521
        # comparison purposes with return value from the fingerprint()
 
522
        # function
915
523
        logger.debug("  Fingerprint: %s", self.fingerprint)
916
 
        self.created = settings.get("created",
917
 
                                    datetime.datetime.utcnow())
 
524
        self.created = settings.get("created", datetime.datetime.utcnow())
918
525
 
919
526
        # attributes specific for this server instance
920
527
        self.checker = None
924
531
        self.current_checker_command = None
925
532
        self.approved = None
926
533
        self.approvals_pending = 0
927
 
        self.changedstate = multiprocessing_manager.Condition(
928
 
            multiprocessing_manager.Lock())
929
 
        self.client_structure = [attr
930
 
                                 for attr in self.__dict__.keys()
 
534
        self.changedstate = (multiprocessing_manager
 
535
                             .Condition(multiprocessing_manager
 
536
                                        .Lock()))
 
537
        self.client_structure = [attr for attr in
 
538
                                 self.__dict__.iterkeys()
931
539
                                 if not attr.startswith("_")]
932
540
        self.client_structure.append("client_structure")
933
 
 
934
 
        for name, t in inspect.getmembers(
935
 
                type(self), lambda obj: isinstance(obj, property)):
 
541
        
 
542
        for name, t in inspect.getmembers(type(self),
 
543
                                          lambda obj:
 
544
                                              isinstance(obj,
 
545
                                                         property)):
936
546
            if not name.startswith("_"):
937
547
                self.client_structure.append(name)
938
 
 
 
548
    
939
549
    # Send notice to process children that client state has changed
940
550
    def send_changedstate(self):
941
551
        with self.changedstate:
942
552
            self.changedstate.notify_all()
943
 
 
 
553
    
944
554
    def enable(self):
945
555
        """Start this client's checker and timeout hooks"""
946
556
        if getattr(self, "enabled", False):
947
557
            # Already enabled
948
558
            return
 
559
        self.send_changedstate()
949
560
        self.expires = datetime.datetime.utcnow() + self.timeout
950
561
        self.enabled = True
951
562
        self.last_enabled = datetime.datetime.utcnow()
952
563
        self.init_checker()
953
 
        self.send_changedstate()
954
 
 
 
564
    
955
565
    def disable(self, quiet=True):
956
566
        """Disable this client."""
957
567
        if not getattr(self, "enabled", False):
958
568
            return False
959
569
        if not quiet:
 
570
            self.send_changedstate()
 
571
        if not quiet:
960
572
            logger.info("Disabling client %s", self.name)
961
 
        if getattr(self, "disable_initiator_tag", None) is not None:
962
 
            GLib.source_remove(self.disable_initiator_tag)
 
573
        if getattr(self, "disable_initiator_tag", False):
 
574
            gobject.source_remove(self.disable_initiator_tag)
963
575
            self.disable_initiator_tag = None
964
576
        self.expires = None
965
 
        if getattr(self, "checker_initiator_tag", None) is not None:
966
 
            GLib.source_remove(self.checker_initiator_tag)
 
577
        if getattr(self, "checker_initiator_tag", False):
 
578
            gobject.source_remove(self.checker_initiator_tag)
967
579
            self.checker_initiator_tag = None
968
580
        self.stop_checker()
969
581
        self.enabled = False
970
 
        if not quiet:
971
 
            self.send_changedstate()
972
 
        # Do not run this again if called by a GLib.timeout_add
 
582
        # Do not run this again if called by a gobject.timeout_add
973
583
        return False
974
 
 
 
584
    
975
585
    def __del__(self):
976
586
        self.disable()
977
 
 
 
587
    
978
588
    def init_checker(self):
979
589
        # Schedule a new checker to be started an 'interval' from now,
980
590
        # 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)
 
591
        self.checker_initiator_tag = (gobject.timeout_add
 
592
                                      (self.interval_milliseconds(),
 
593
                                       self.start_checker))
986
594
        # 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)
 
595
        self.disable_initiator_tag = (gobject.timeout_add
 
596
                                   (self.timeout_milliseconds(),
 
597
                                    self.disable))
991
598
        # Also start a new checker *right now*.
992
599
        self.start_checker()
993
 
 
994
 
    def checker_callback(self, source, condition, connection,
995
 
                         command):
 
600
    
 
601
    def checker_callback(self, pid, condition, command):
996
602
        """The checker has completed, so take appropriate actions."""
997
603
        self.checker_callback_tag = None
998
604
        self.checker = None
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
 
605
        if os.WIFEXITED(condition):
 
606
            self.last_checker_status = os.WEXITSTATUS(condition)
1006
607
            if self.last_checker_status == 0:
1007
608
                logger.info("Checker for %(name)s succeeded",
1008
609
                            vars(self))
1009
610
                self.checked_ok()
1010
611
            else:
1011
 
                logger.info("Checker for %(name)s failed", vars(self))
 
612
                logger.info("Checker for %(name)s failed",
 
613
                            vars(self))
1012
614
        else:
1013
615
            self.last_checker_status = -1
1014
 
            self.last_checker_signal = -returncode
1015
616
            logger.warning("Checker for %(name)s crashed?",
1016
617
                           vars(self))
1017
 
        return False
1018
 
 
1019
 
    def checked_ok(self):
1020
 
        """Assert that the client has been seen, alive and well."""
1021
 
        self.last_checked_ok = datetime.datetime.utcnow()
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."""
 
618
    
 
619
    def checked_ok(self, timeout=None):
 
620
        """Bump up the timeout for this client.
 
621
        
 
622
        This should only be called when the client has been seen,
 
623
        alive and well.
 
624
        """
1028
625
        if timeout is None:
1029
626
            timeout = self.timeout
 
627
        self.last_checked_ok = datetime.datetime.utcnow()
1030
628
        if self.disable_initiator_tag is not None:
1031
 
            GLib.source_remove(self.disable_initiator_tag)
1032
 
            self.disable_initiator_tag = None
 
629
            gobject.source_remove(self.disable_initiator_tag)
1033
630
        if getattr(self, "enabled", False):
1034
 
            self.disable_initiator_tag = GLib.timeout_add(
1035
 
                int(timeout.total_seconds() * 1000), self.disable)
 
631
            self.disable_initiator_tag = (gobject.timeout_add
 
632
                                          (timedelta_to_milliseconds
 
633
                                           (timeout), self.disable))
1036
634
            self.expires = datetime.datetime.utcnow() + timeout
1037
 
 
 
635
    
1038
636
    def need_approval(self):
1039
637
        self.last_approval_request = datetime.datetime.utcnow()
1040
 
 
 
638
    
1041
639
    def start_checker(self):
1042
640
        """Start a new checker subprocess if one is not running.
1043
 
 
 
641
        
1044
642
        If a checker already exists, leave it running and do
1045
643
        nothing."""
1046
644
        # The reason for not killing a running checker is that if we
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
 
645
        # did that, then if a checker (for some reason) started
 
646
        # running slowly and taking more than 'interval' time, the
 
647
        # client would inevitably timeout, since no checker would get
 
648
        # a chance to run to completion.  If we instead leave running
1051
649
        # checkers alone, the checker would have to take more time
1052
650
        # than 'timeout' for the client to be disabled, which is as it
1053
651
        # should be.
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
 
652
        
 
653
        # If a checker exists, make sure it is not a zombie
 
654
        try:
 
655
            pid, status = os.waitpid(self.checker.pid, os.WNOHANG)
 
656
        except (AttributeError, OSError) as error:
 
657
            if (isinstance(error, OSError)
 
658
                and error.errno != errno.ECHILD):
 
659
                raise error
 
660
        else:
 
661
            if pid:
 
662
                logger.warning("Checker was a zombie")
 
663
                gobject.source_remove(self.checker_callback_tag)
 
664
                self.checker_callback(pid, status,
 
665
                                      self.current_checker_command)
1059
666
        # Start a new checker if needed
1060
667
        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}
1065
668
            try:
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
 
669
                # In case checker_command has exactly one % operator
 
670
                command = self.checker_command % self.host
 
671
            except TypeError:
 
672
                # Escape attributes for the shell
 
673
                escaped_attrs = dict(
 
674
                    (attr,
 
675
                     re.escape(unicode(str(getattr(self, attr, "")),
 
676
                                       errors=
 
677
                                       'replace')))
 
678
                    for attr in
 
679
                    self.runtime_expansions)
 
680
                
 
681
                try:
 
682
                    command = self.checker_command % escaped_attrs
 
683
                except TypeError as error:
 
684
                    logger.error('Could not format string "%s":'
 
685
                                 ' %s', self.checker_command, error)
 
686
                    return True # Try again later
1072
687
            self.current_checker_command = command
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
 
688
            try:
 
689
                logger.info("Starting checker %r for %s",
 
690
                            command, self.name)
 
691
                # We don't need to redirect stdout and stderr, since
 
692
                # in normal mode, that is already done by daemon(),
 
693
                # and in debug mode we don't want to.  (Stdin is
 
694
                # always replaced by /dev/null.)
 
695
                self.checker = subprocess.Popen(command,
 
696
                                                close_fds=True,
 
697
                                                shell=True, cwd="/")
 
698
                self.checker_callback_tag = (gobject.child_watch_add
 
699
                                             (self.checker.pid,
 
700
                                              self.checker_callback,
 
701
                                              data=command))
 
702
                # The checker may have completed before the gobject
 
703
                # watch was added.  Check for this.
 
704
                pid, status = os.waitpid(self.checker.pid, os.WNOHANG)
 
705
                if pid:
 
706
                    gobject.source_remove(self.checker_callback_tag)
 
707
                    self.checker_callback(pid, status, command)
 
708
            except OSError as error:
 
709
                logger.error("Failed to start subprocess: %s",
 
710
                             error)
 
711
        # Re-run this periodically if run by gobject.timeout_add
1099
712
        return True
1100
 
 
 
713
    
1101
714
    def stop_checker(self):
1102
715
        """Force the checker process, if any, to stop."""
1103
716
        if self.checker_callback_tag:
1104
 
            GLib.source_remove(self.checker_callback_tag)
 
717
            gobject.source_remove(self.checker_callback_tag)
1105
718
            self.checker_callback_tag = None
1106
719
        if getattr(self, "checker", None) is None:
1107
720
            return
1108
721
        logger.debug("Stopping checker for %(name)s", vars(self))
1109
 
        self.checker.terminate()
 
722
        try:
 
723
            os.kill(self.checker.pid, signal.SIGTERM)
 
724
            #time.sleep(0.5)
 
725
            #if self.checker.poll() is None:
 
726
            #    os.kill(self.checker.pid, signal.SIGKILL)
 
727
        except OSError as error:
 
728
            if error.errno != errno.ESRCH: # No such process
 
729
                raise
1110
730
        self.checker = None
1111
731
 
1112
732
 
1113
 
def dbus_service_property(dbus_interface,
1114
 
                          signature="v",
1115
 
                          access="readwrite",
1116
 
                          byte_arrays=False):
 
733
def dbus_service_property(dbus_interface, signature="v",
 
734
                          access="readwrite", byte_arrays=False):
1117
735
    """Decorators for marking methods of a DBusObjectWithProperties to
1118
736
    become properties on the D-Bus.
1119
 
 
 
737
    
1120
738
    The decorated method will be called with no arguments by "Get"
1121
739
    and with one argument by "Set".
1122
 
 
 
740
    
1123
741
    The parameters, where they are supported, are the same as
1124
742
    dbus.service.method, except there is only "signature", since the
1125
743
    type from Get() and the type sent to Set() is the same.
1128
746
    # "Set" method, so we fail early here:
1129
747
    if byte_arrays and signature != "ay":
1130
748
        raise ValueError("Byte arrays not supported for non-'ay'"
1131
 
                         " signature {!r}".format(signature))
1132
 
 
 
749
                         " signature %r" % signature)
1133
750
    def decorator(func):
1134
751
        func._dbus_is_property = True
1135
752
        func._dbus_interface = dbus_interface
1138
755
        func._dbus_name = func.__name__
1139
756
        if func._dbus_name.endswith("_dbus_property"):
1140
757
            func._dbus_name = func._dbus_name[:-14]
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
 
 
 
758
        func._dbus_get_args_options = {'byte_arrays': byte_arrays }
 
759
        return func
1187
760
    return decorator
1188
761
 
1189
762
 
1190
763
class DBusPropertyException(dbus.exceptions.DBusException):
1191
764
    """A base class for D-Bus property-related exceptions
1192
765
    """
1193
 
    pass
 
766
    def __unicode__(self):
 
767
        return unicode(str(self))
1194
768
 
1195
769
 
1196
770
class DBusPropertyAccessException(DBusPropertyException):
1205
779
    pass
1206
780
 
1207
781
 
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):
 
782
class DBusObjectWithProperties(dbus.service.Object):
1298
783
    """A D-Bus object with properties.
1299
 
 
 
784
    
1300
785
    Classes inheriting from this can use the dbus_service_property
1301
786
    decorator to expose methods as D-Bus properties.  It exposes the
1302
787
    standard Get(), Set(), and GetAll() methods on the D-Bus.
1303
788
    """
1304
 
 
 
789
    
 
790
    @staticmethod
 
791
    def _is_dbus_property(obj):
 
792
        return getattr(obj, "_dbus_is_property", False)
 
793
    
 
794
    def _get_all_dbus_properties(self):
 
795
        """Returns a generator of (name, attribute) pairs
 
796
        """
 
797
        return ((prop.__get__(self)._dbus_name, prop.__get__(self))
 
798
                for cls in self.__class__.__mro__
 
799
                for name, prop in
 
800
                inspect.getmembers(cls, self._is_dbus_property))
 
801
    
1305
802
    def _get_dbus_property(self, interface_name, property_name):
1306
803
        """Returns a bound method if one exists which is a D-Bus
1307
804
        property with the specified name and interface.
1308
805
        """
1309
 
        for cls in self.__class__.__mro__:
1310
 
            for name, value in inspect.getmembers(
1311
 
                    cls, self._is_dbus_thing("property")):
 
806
        for cls in  self.__class__.__mro__:
 
807
            for name, value in (inspect.getmembers
 
808
                                (cls, self._is_dbus_property)):
1312
809
                if (value._dbus_name == property_name
1313
810
                    and value._dbus_interface == interface_name):
1314
811
                    return value.__get__(self)
1315
 
 
 
812
        
1316
813
        # No such property
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",
 
814
        raise DBusPropertyNotFound(self.dbus_object_path + ":"
 
815
                                   + interface_name + "."
 
816
                                   + property_name)
 
817
    
 
818
    @dbus.service.method(dbus.PROPERTIES_IFACE, in_signature="ss",
1331
819
                         out_signature="v")
1332
820
    def Get(self, interface_name, property_name):
1333
821
        """Standard D-Bus property Get() method, see D-Bus standard.
1339
827
        if not hasattr(value, "variant_level"):
1340
828
            return value
1341
829
        return type(value)(value, variant_level=value.variant_level+1)
1342
 
 
 
830
    
1343
831
    @dbus.service.method(dbus.PROPERTIES_IFACE, in_signature="ssv")
1344
832
    def Set(self, interface_name, property_name, value):
1345
833
        """Standard D-Bus property Set() method, see D-Bus standard.
1351
839
            # The byte_arrays option is not supported yet on
1352
840
            # signatures other than "ay".
1353
841
            if prop._dbus_signature != "ay":
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))
 
842
                raise ValueError
 
843
            value = dbus.ByteArray(''.join(unichr(byte)
 
844
                                           for byte in value))
1359
845
        prop(value)
1360
 
 
1361
 
    @dbus.service.method(dbus.PROPERTIES_IFACE,
1362
 
                         in_signature="s",
 
846
    
 
847
    @dbus.service.method(dbus.PROPERTIES_IFACE, in_signature="s",
1363
848
                         out_signature="a{sv}")
1364
849
    def GetAll(self, interface_name):
1365
850
        """Standard D-Bus property GetAll() method, see D-Bus
1366
851
        standard.
1367
 
 
 
852
        
1368
853
        Note: Will not include properties with access="write".
1369
854
        """
1370
855
        properties = {}
1371
 
        for name, prop in self._get_all_dbus_things("property"):
 
856
        for name, prop in self._get_all_dbus_properties():
1372
857
            if (interface_name
1373
858
                and interface_name != prop._dbus_interface):
1374
859
                # Interface non-empty but did not match
1380
865
            if not hasattr(value, "variant_level"):
1381
866
                properties[name] = value
1382
867
                continue
1383
 
            properties[name] = type(value)(
1384
 
                value, variant_level=value.variant_level + 1)
 
868
            properties[name] = type(value)(value, variant_level=
 
869
                                           value.variant_level+1)
1385
870
        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
 
 
 
871
    
1395
872
    @dbus.service.method(dbus.INTROSPECTABLE_IFACE,
1396
873
                         out_signature="s",
1397
874
                         path_keyword='object_path',
1398
875
                         connection_keyword='connection')
1399
876
    def Introspect(self, object_path, connection):
1400
 
        """Overloading of standard D-Bus method.
1401
 
 
1402
 
        Inserts property tags and interface annotation tags.
 
877
        """Standard D-Bus method, overloaded to insert property tags.
1403
878
        """
1404
 
        xmlstring = DBusObjectWithAnnotations.Introspect(self,
1405
 
                                                         object_path,
1406
 
                                                         connection)
 
879
        xmlstring = dbus.service.Object.Introspect(self, object_path,
 
880
                                                   connection)
1407
881
        try:
1408
882
            document = xml.dom.minidom.parseString(xmlstring)
1409
 
 
1410
883
            def make_tag(document, name, prop):
1411
884
                e = document.createElement("property")
1412
885
                e.setAttribute("name", name)
1413
886
                e.setAttribute("type", prop._dbus_signature)
1414
887
                e.setAttribute("access", prop._dbus_access)
1415
888
                return e
1416
 
 
1417
889
            for if_tag in document.getElementsByTagName("interface"):
1418
 
                # Add property tags
1419
890
                for tag in (make_tag(document, name, prop)
1420
891
                            for name, prop
1421
 
                            in self._get_all_dbus_things("property")
 
892
                            in self._get_all_dbus_properties()
1422
893
                            if prop._dbus_interface
1423
894
                            == if_tag.getAttribute("name")):
1424
895
                    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)
1441
896
                # Add the names to the return values for the
1442
897
                # "org.freedesktop.DBus.Properties" methods
1443
898
                if (if_tag.getAttribute("name")
1458
913
        except (AttributeError, xml.dom.DOMException,
1459
914
                xml.parsers.expat.ExpatError) as error:
1460
915
            logger.error("Failed to override Introspection method",
1461
 
                         exc_info=error)
1462
 
        return xmlstring
1463
 
 
1464
 
 
1465
 
try:
1466
 
    dbus.OBJECT_MANAGER_IFACE
1467
 
except AttributeError:
1468
 
    dbus.OBJECT_MANAGER_IFACE = "org.freedesktop.DBus.ObjectManager"
1469
 
 
1470
 
 
1471
 
class DBusObjectWithObjectManager(DBusObjectWithAnnotations):
1472
 
    """A D-Bus object with an ObjectManager.
1473
 
 
1474
 
    Classes inheriting from this exposes the standard
1475
 
    GetManagedObjects call and the InterfacesAdded and
1476
 
    InterfacesRemoved signals on the standard
1477
 
    "org.freedesktop.DBus.ObjectManager" interface.
1478
 
 
1479
 
    Note: No signals are sent automatically; they must be sent
1480
 
    manually.
1481
 
    """
1482
 
    @dbus.service.method(dbus.OBJECT_MANAGER_IFACE,
1483
 
                         out_signature="a{oa{sa{sv}}}")
1484
 
    def GetManagedObjects(self):
1485
 
        """This function must be overridden"""
1486
 
        raise NotImplementedError()
1487
 
 
1488
 
    @dbus.service.signal(dbus.OBJECT_MANAGER_IFACE,
1489
 
                         signature="oa{sa{sv}}")
1490
 
    def InterfacesAdded(self, object_path, interfaces_and_properties):
1491
 
        pass
1492
 
 
1493
 
    @dbus.service.signal(dbus.OBJECT_MANAGER_IFACE, signature="oas")
1494
 
    def InterfacesRemoved(self, object_path, interfaces):
1495
 
        pass
1496
 
 
1497
 
    @dbus.service.method(dbus.INTROSPECTABLE_IFACE,
1498
 
                         out_signature="s",
1499
 
                         path_keyword='object_path',
1500
 
                         connection_keyword='connection')
1501
 
    def Introspect(self, object_path, connection):
1502
 
        """Overloading of standard D-Bus method.
1503
 
 
1504
 
        Override return argument name of GetManagedObjects to be
1505
 
        "objpath_interfaces_and_properties"
1506
 
        """
1507
 
        xmlstring = DBusObjectWithAnnotations.Introspect(self,
1508
 
                                                         object_path,
1509
 
                                                         connection)
1510
 
        try:
1511
 
            document = xml.dom.minidom.parseString(xmlstring)
1512
 
 
1513
 
            for if_tag in document.getElementsByTagName("interface"):
1514
 
                # Fix argument name for the GetManagedObjects method
1515
 
                if (if_tag.getAttribute("name")
1516
 
                    == dbus.OBJECT_MANAGER_IFACE):
1517
 
                    for cn in if_tag.getElementsByTagName("method"):
1518
 
                        if (cn.getAttribute("name")
1519
 
                            == "GetManagedObjects"):
1520
 
                            for arg in cn.getElementsByTagName("arg"):
1521
 
                                if (arg.getAttribute("direction")
1522
 
                                    == "out"):
1523
 
                                    arg.setAttribute(
1524
 
                                        "name",
1525
 
                                        "objpath_interfaces"
1526
 
                                        "_and_properties")
1527
 
            xmlstring = document.toxml("utf-8")
1528
 
            document.unlink()
1529
 
        except (AttributeError, xml.dom.DOMException,
1530
 
                xml.parsers.expat.ExpatError) as error:
1531
 
            logger.error("Failed to override Introspection method",
1532
 
                         exc_info=error)
1533
 
        return xmlstring
1534
 
 
1535
 
 
1536
 
def datetime_to_dbus(dt, variant_level=0):
 
916
                         error)
 
917
        return xmlstring
 
918
 
 
919
 
 
920
def datetime_to_dbus (dt, variant_level=0):
1537
921
    """Convert a UTC datetime.datetime() to a D-Bus type."""
1538
922
    if dt is None:
1539
 
        return dbus.String("", variant_level=variant_level)
1540
 
    return dbus.String(dt.isoformat(), variant_level=variant_level)
1541
 
 
1542
 
 
1543
 
def alternate_dbus_interfaces(alt_interface_names, deprecate=True):
1544
 
    """A class decorator; applied to a subclass of
1545
 
    dbus.service.Object, it will add alternate D-Bus attributes with
1546
 
    interface names according to the "alt_interface_names" mapping.
1547
 
    Usage:
1548
 
 
1549
 
    @alternate_dbus_interfaces({"org.example.Interface":
1550
 
                                    "net.example.AlternateInterface"})
1551
 
    class SampleDBusObject(dbus.service.Object):
1552
 
        @dbus.service.method("org.example.Interface")
1553
 
        def SampleDBusMethod():
1554
 
            pass
1555
 
 
1556
 
    The above "SampleDBusMethod" on "SampleDBusObject" will be
1557
 
    reachable via two interfaces: "org.example.Interface" and
1558
 
    "net.example.AlternateInterface", the latter of which will have
1559
 
    its D-Bus annotation "org.freedesktop.DBus.Deprecated" set to
1560
 
    "true", unless "deprecate" is passed with a False value.
1561
 
 
1562
 
    This works for methods and signals, and also for D-Bus properties
1563
 
    (from DBusObjectWithProperties) and interfaces (from the
1564
 
    dbus_interface_annotations decorator).
 
923
        return dbus.String("", variant_level = variant_level)
 
924
    return dbus.String(dt.isoformat(),
 
925
                       variant_level=variant_level)
 
926
 
 
927
 
 
928
class AlternateDBusNamesMetaclass(DBusObjectWithProperties
 
929
                                  .__metaclass__):
 
930
    """Applied to an empty subclass of a D-Bus object, this metaclass
 
931
    will add additional D-Bus attributes matching a certain pattern.
1565
932
    """
1566
 
 
1567
 
    def wrapper(cls):
1568
 
        for orig_interface_name, alt_interface_name in (
1569
 
                alt_interface_names.items()):
1570
 
            attr = {}
1571
 
            interface_names = set()
1572
 
            # Go though all attributes of the class
1573
 
            for attrname, attribute in inspect.getmembers(cls):
 
933
    def __new__(mcs, name, bases, attr):
 
934
        # Go through all the base classes which could have D-Bus
 
935
        # methods, signals, or properties in them
 
936
        for base in (b for b in bases
 
937
                     if issubclass(b, dbus.service.Object)):
 
938
            # Go though all attributes of the base class
 
939
            for attrname, attribute in inspect.getmembers(base):
1574
940
                # Ignore non-D-Bus attributes, and D-Bus attributes
1575
941
                # with the wrong interface name
1576
942
                if (not hasattr(attribute, "_dbus_interface")
1577
 
                    or not attribute._dbus_interface.startswith(
1578
 
                        orig_interface_name)):
 
943
                    or not attribute._dbus_interface
 
944
                    .startswith("se.recompile.Mandos")):
1579
945
                    continue
1580
946
                # Create an alternate D-Bus interface name based on
1581
947
                # the current name
1582
 
                alt_interface = attribute._dbus_interface.replace(
1583
 
                    orig_interface_name, alt_interface_name)
1584
 
                interface_names.add(alt_interface)
 
948
                alt_interface = (attribute._dbus_interface
 
949
                                 .replace("se.recompile.Mandos",
 
950
                                          "se.bsnet.fukt.Mandos"))
1585
951
                # Is this a D-Bus signal?
1586
952
                if getattr(attribute, "_dbus_is_signal", False):
1587
 
                    # Extract the original non-method undecorated
1588
 
                    # function by black magic
1589
 
                    if sys.version_info.major == 2:
1590
 
                        nonmethod_func = (dict(
 
953
                    # Extract the original non-method function by
 
954
                    # black magic
 
955
                    nonmethod_func = (dict(
1591
956
                            zip(attribute.func_code.co_freevars,
1592
 
                                attribute.__closure__))
1593
 
                                          ["func"].cell_contents)
1594
 
                    else:
1595
 
                        nonmethod_func = (dict(
1596
 
                            zip(attribute.__code__.co_freevars,
1597
 
                                attribute.__closure__))
1598
 
                                          ["func"].cell_contents)
 
957
                                attribute.__closure__))["func"]
 
958
                                      .cell_contents)
1599
959
                    # Create a new, but exactly alike, function
1600
960
                    # object, and decorate it to be a new D-Bus signal
1601
961
                    # with the alternate D-Bus interface name
1602
 
                    new_function = copy_function(nonmethod_func)
1603
 
                    new_function = (dbus.service.signal(
1604
 
                        alt_interface,
1605
 
                        attribute._dbus_signature)(new_function))
1606
 
                    # Copy annotations, if any
1607
 
                    try:
1608
 
                        new_function._dbus_annotations = dict(
1609
 
                            attribute._dbus_annotations)
1610
 
                    except AttributeError:
1611
 
                        pass
1612
 
 
 
962
                    new_function = (dbus.service.signal
 
963
                                    (alt_interface,
 
964
                                     attribute._dbus_signature)
 
965
                                    (types.FunctionType(
 
966
                                nonmethod_func.func_code,
 
967
                                nonmethod_func.func_globals,
 
968
                                nonmethod_func.func_name,
 
969
                                nonmethod_func.func_defaults,
 
970
                                nonmethod_func.func_closure)))
1613
971
                    # Define a creator of a function to call both the
1614
 
                    # original and alternate functions, so both the
1615
 
                    # original and alternate signals gets sent when
1616
 
                    # the function is called
 
972
                    # old and new functions, so both the old and new
 
973
                    # signals gets sent when the function is called
1617
974
                    def fixscope(func1, func2):
1618
975
                        """This function is a scope container to pass
1619
976
                        func1 and func2 to the "call_both" function
1620
977
                        outside of its arguments"""
1621
 
 
1622
 
                        @functools.wraps(func2)
1623
978
                        def call_both(*args, **kwargs):
1624
979
                            """This function will emit two D-Bus
1625
980
                            signals by calling func1 and func2"""
1626
981
                            func1(*args, **kwargs)
1627
982
                            func2(*args, **kwargs)
1628
 
                        # Make wrapper function look like a D-Bus
1629
 
                        # signal
1630
 
                        for name, attr in inspect.getmembers(func2):
1631
 
                            if name.startswith("_dbus_"):
1632
 
                                setattr(call_both, name, attr)
1633
 
 
1634
983
                        return call_both
1635
984
                    # Create the "call_both" function and add it to
1636
985
                    # the class
1637
 
                    attr[attrname] = fixscope(attribute, new_function)
 
986
                    attr[attrname] = fixscope(attribute,
 
987
                                              new_function)
1638
988
                # Is this a D-Bus method?
1639
989
                elif getattr(attribute, "_dbus_is_method", False):
1640
990
                    # Create a new, but exactly alike, function
1641
991
                    # object.  Decorate it to be a new D-Bus method
1642
992
                    # with the alternate D-Bus interface name.  Add it
1643
993
                    # to the class.
1644
 
                    attr[attrname] = (
1645
 
                        dbus.service.method(
1646
 
                            alt_interface,
1647
 
                            attribute._dbus_in_signature,
1648
 
                            attribute._dbus_out_signature)
1649
 
                        (copy_function(attribute)))
1650
 
                    # Copy annotations, if any
1651
 
                    try:
1652
 
                        attr[attrname]._dbus_annotations = dict(
1653
 
                            attribute._dbus_annotations)
1654
 
                    except AttributeError:
1655
 
                        pass
 
994
                    attr[attrname] = (dbus.service.method
 
995
                                      (alt_interface,
 
996
                                       attribute._dbus_in_signature,
 
997
                                       attribute._dbus_out_signature)
 
998
                                      (types.FunctionType
 
999
                                       (attribute.func_code,
 
1000
                                        attribute.func_globals,
 
1001
                                        attribute.func_name,
 
1002
                                        attribute.func_defaults,
 
1003
                                        attribute.func_closure)))
1656
1004
                # Is this a D-Bus property?
1657
1005
                elif getattr(attribute, "_dbus_is_property", False):
1658
1006
                    # Create a new, but exactly alike, function
1659
1007
                    # object, and decorate it to be a new D-Bus
1660
1008
                    # property with the alternate D-Bus interface
1661
1009
                    # name.  Add it to the class.
1662
 
                    attr[attrname] = (dbus_service_property(
1663
 
                        alt_interface, attribute._dbus_signature,
1664
 
                        attribute._dbus_access,
1665
 
                        attribute._dbus_get_args_options
1666
 
                        ["byte_arrays"])
1667
 
                                      (copy_function(attribute)))
1668
 
                    # Copy annotations, if any
1669
 
                    try:
1670
 
                        attr[attrname]._dbus_annotations = dict(
1671
 
                            attribute._dbus_annotations)
1672
 
                    except AttributeError:
1673
 
                        pass
1674
 
                # Is this a D-Bus interface?
1675
 
                elif getattr(attribute, "_dbus_is_interface", False):
1676
 
                    # Create a new, but exactly alike, function
1677
 
                    # object.  Decorate it to be a new D-Bus interface
1678
 
                    # with the alternate D-Bus interface name.  Add it
1679
 
                    # to the class.
1680
 
                    attr[attrname] = (
1681
 
                        dbus_interface_annotations(alt_interface)
1682
 
                        (copy_function(attribute)))
1683
 
            if deprecate:
1684
 
                # Deprecate all alternate interfaces
1685
 
                iname = "_AlternateDBusNames_interface_annotation{}"
1686
 
                for interface_name in interface_names:
1687
 
 
1688
 
                    @dbus_interface_annotations(interface_name)
1689
 
                    def func(self):
1690
 
                        return {"org.freedesktop.DBus.Deprecated":
1691
 
                                "true"}
1692
 
                    # Find an unused name
1693
 
                    for aname in (iname.format(i)
1694
 
                                  for i in itertools.count()):
1695
 
                        if aname not in attr:
1696
 
                            attr[aname] = func
1697
 
                            break
1698
 
            if interface_names:
1699
 
                # Replace the class with a new subclass of it with
1700
 
                # methods, signals, etc. as created above.
1701
 
                if sys.version_info.major == 2:
1702
 
                    cls = type(b"{}Alternate".format(cls.__name__),
1703
 
                               (cls, ), attr)
1704
 
                else:
1705
 
                    cls = type("{}Alternate".format(cls.__name__),
1706
 
                               (cls, ), attr)
1707
 
        return cls
1708
 
 
1709
 
    return wrapper
1710
 
 
1711
 
 
1712
 
@alternate_dbus_interfaces({"se.recompile.Mandos":
1713
 
                            "se.bsnet.fukt.Mandos"})
 
1010
                    attr[attrname] = (dbus_service_property
 
1011
                                      (alt_interface,
 
1012
                                       attribute._dbus_signature,
 
1013
                                       attribute._dbus_access,
 
1014
                                       attribute
 
1015
                                       ._dbus_get_args_options
 
1016
                                       ["byte_arrays"])
 
1017
                                      (types.FunctionType
 
1018
                                       (attribute.func_code,
 
1019
                                        attribute.func_globals,
 
1020
                                        attribute.func_name,
 
1021
                                        attribute.func_defaults,
 
1022
                                        attribute.func_closure)))
 
1023
        return type.__new__(mcs, name, bases, attr)
 
1024
 
 
1025
 
1714
1026
class ClientDBus(Client, DBusObjectWithProperties):
1715
1027
    """A Client class using D-Bus
1716
 
 
 
1028
    
1717
1029
    Attributes:
1718
1030
    dbus_object_path: dbus.ObjectPath
1719
1031
    bus: dbus.SystemBus()
1720
1032
    """
1721
 
 
 
1033
    
1722
1034
    runtime_expansions = (Client.runtime_expansions
1723
 
                          + ("dbus_object_path", ))
1724
 
 
1725
 
    _interface = "se.recompile.Mandos.Client"
1726
 
 
 
1035
                          + ("dbus_object_path",))
 
1036
    
1727
1037
    # dbus.service.Object doesn't use super(), so we can't either.
1728
 
 
1729
 
    def __init__(self, bus=None, *args, **kwargs):
 
1038
    
 
1039
    def __init__(self, bus = None, *args, **kwargs):
1730
1040
        self.bus = bus
1731
1041
        Client.__init__(self, *args, **kwargs)
 
1042
        self._approvals_pending = 0
 
1043
        
 
1044
        self._approvals_pending = 0
1732
1045
        # Only now, when this client is initialized, can it show up on
1733
1046
        # the D-Bus
1734
 
        client_object_name = str(self.name).translate(
 
1047
        client_object_name = unicode(self.name).translate(
1735
1048
            {ord("."): ord("_"),
1736
1049
             ord("-"): ord("_")})
1737
 
        self.dbus_object_path = dbus.ObjectPath(
1738
 
            "/clients/" + client_object_name)
 
1050
        self.dbus_object_path = (dbus.ObjectPath
 
1051
                                 ("/clients/" + client_object_name))
1739
1052
        DBusObjectWithProperties.__init__(self, self.bus,
1740
1053
                                          self.dbus_object_path)
1741
 
 
1742
 
    def notifychangeproperty(transform_func, dbus_name,
1743
 
                             type_func=lambda x: x,
1744
 
                             variant_level=1,
1745
 
                             invalidate_only=False,
1746
 
                             _interface=_interface):
 
1054
        
 
1055
    def notifychangeproperty(transform_func,
 
1056
                             dbus_name, type_func=lambda x: x,
 
1057
                             variant_level=1):
1747
1058
        """ Modify a variable so that it's a property which announces
1748
1059
        its changes to DBus.
1749
 
 
 
1060
        
1750
1061
        transform_fun: Function that takes a value and a variant_level
1751
1062
                       and transforms it to a D-Bus type.
1752
1063
        dbus_name: D-Bus name of the variable
1754
1065
                   to the D-Bus.  Default: no transform
1755
1066
        variant_level: D-Bus variant level.  Default: 1
1756
1067
        """
1757
 
        attrname = "_{}".format(dbus_name)
1758
 
 
 
1068
        attrname = "_{0}".format(dbus_name)
1759
1069
        def setter(self, value):
1760
1070
            if hasattr(self, "dbus_object_path"):
1761
1071
                if (not hasattr(self, attrname) or
1762
1072
                    type_func(getattr(self, attrname, None))
1763
1073
                    != type_func(value)):
1764
 
                    if invalidate_only:
1765
 
                        self.PropertiesChanged(
1766
 
                            _interface, dbus.Dictionary(),
1767
 
                            dbus.Array((dbus_name, )))
1768
 
                    else:
1769
 
                        dbus_value = transform_func(
1770
 
                            type_func(value),
1771
 
                            variant_level=variant_level)
1772
 
                        self.PropertyChanged(dbus.String(dbus_name),
1773
 
                                             dbus_value)
1774
 
                        self.PropertiesChanged(
1775
 
                            _interface,
1776
 
                            dbus.Dictionary({dbus.String(dbus_name):
1777
 
                                             dbus_value}),
1778
 
                            dbus.Array())
 
1074
                    dbus_value = transform_func(type_func(value),
 
1075
                                                variant_level
 
1076
                                                =variant_level)
 
1077
                    self.PropertyChanged(dbus.String(dbus_name),
 
1078
                                         dbus_value)
1779
1079
            setattr(self, attrname, value)
1780
 
 
 
1080
        
1781
1081
        return property(lambda self: getattr(self, attrname), setter)
1782
 
 
 
1082
    
 
1083
    
1783
1084
    expires = notifychangeproperty(datetime_to_dbus, "Expires")
1784
1085
    approvals_pending = notifychangeproperty(dbus.Boolean,
1785
1086
                                             "ApprovalPending",
1786
 
                                             type_func=bool)
 
1087
                                             type_func = bool)
1787
1088
    enabled = notifychangeproperty(dbus.Boolean, "Enabled")
1788
1089
    last_enabled = notifychangeproperty(datetime_to_dbus,
1789
1090
                                        "LastEnabled")
1790
 
    checker = notifychangeproperty(
1791
 
        dbus.Boolean, "CheckerRunning",
1792
 
        type_func=lambda checker: checker is not None)
 
1091
    checker = notifychangeproperty(dbus.Boolean, "CheckerRunning",
 
1092
                                   type_func = lambda checker:
 
1093
                                       checker is not None)
1793
1094
    last_checked_ok = notifychangeproperty(datetime_to_dbus,
1794
1095
                                           "LastCheckedOK")
1795
 
    last_checker_status = notifychangeproperty(dbus.Int16,
1796
 
                                               "LastCheckerStatus")
1797
1096
    last_approval_request = notifychangeproperty(
1798
1097
        datetime_to_dbus, "LastApprovalRequest")
1799
1098
    approved_by_default = notifychangeproperty(dbus.Boolean,
1800
1099
                                               "ApprovedByDefault")
1801
 
    approval_delay = notifychangeproperty(
1802
 
        dbus.UInt64, "ApprovalDelay",
1803
 
        type_func=lambda td: td.total_seconds() * 1000)
 
1100
    approval_delay = notifychangeproperty(dbus.UInt64,
 
1101
                                          "ApprovalDelay",
 
1102
                                          type_func =
 
1103
                                          timedelta_to_milliseconds)
1804
1104
    approval_duration = notifychangeproperty(
1805
1105
        dbus.UInt64, "ApprovalDuration",
1806
 
        type_func=lambda td: td.total_seconds() * 1000)
 
1106
        type_func = timedelta_to_milliseconds)
1807
1107
    host = notifychangeproperty(dbus.String, "Host")
1808
 
    timeout = notifychangeproperty(
1809
 
        dbus.UInt64, "Timeout",
1810
 
        type_func=lambda td: td.total_seconds() * 1000)
 
1108
    timeout = notifychangeproperty(dbus.UInt64, "Timeout",
 
1109
                                   type_func =
 
1110
                                   timedelta_to_milliseconds)
1811
1111
    extended_timeout = notifychangeproperty(
1812
1112
        dbus.UInt64, "ExtendedTimeout",
1813
 
        type_func=lambda td: td.total_seconds() * 1000)
1814
 
    interval = notifychangeproperty(
1815
 
        dbus.UInt64, "Interval",
1816
 
        type_func=lambda td: td.total_seconds() * 1000)
 
1113
        type_func = timedelta_to_milliseconds)
 
1114
    interval = notifychangeproperty(dbus.UInt64,
 
1115
                                    "Interval",
 
1116
                                    type_func =
 
1117
                                    timedelta_to_milliseconds)
1817
1118
    checker_command = notifychangeproperty(dbus.String, "Checker")
1818
 
    secret = notifychangeproperty(dbus.ByteArray, "Secret",
1819
 
                                  invalidate_only=True)
1820
 
 
 
1119
    
1821
1120
    del notifychangeproperty
1822
 
 
 
1121
    
1823
1122
    def __del__(self, *args, **kwargs):
1824
1123
        try:
1825
1124
            self.remove_from_connection()
1828
1127
        if hasattr(DBusObjectWithProperties, "__del__"):
1829
1128
            DBusObjectWithProperties.__del__(self, *args, **kwargs)
1830
1129
        Client.__del__(self, *args, **kwargs)
1831
 
 
1832
 
    def checker_callback(self, source, condition,
1833
 
                         connection, command, *args, **kwargs):
1834
 
        ret = Client.checker_callback(self, source, condition,
1835
 
                                      connection, command, *args,
1836
 
                                      **kwargs)
1837
 
        exitstatus = self.last_checker_status
1838
 
        if exitstatus >= 0:
 
1130
    
 
1131
    def checker_callback(self, pid, condition, command,
 
1132
                         *args, **kwargs):
 
1133
        self.checker_callback_tag = None
 
1134
        self.checker = None
 
1135
        if os.WIFEXITED(condition):
 
1136
            exitstatus = os.WEXITSTATUS(condition)
1839
1137
            # Emit D-Bus signal
1840
1138
            self.CheckerCompleted(dbus.Int16(exitstatus),
1841
 
                                  # This is specific to GNU libC
1842
 
                                  dbus.Int64(exitstatus << 8),
 
1139
                                  dbus.Int64(condition),
1843
1140
                                  dbus.String(command))
1844
1141
        else:
1845
1142
            # Emit D-Bus signal
1846
1143
            self.CheckerCompleted(dbus.Int16(-1),
1847
 
                                  dbus.Int64(
1848
 
                                      # This is specific to GNU libC
1849
 
                                      (exitstatus << 8)
1850
 
                                      | self.last_checker_signal),
 
1144
                                  dbus.Int64(condition),
1851
1145
                                  dbus.String(command))
1852
 
        return ret
1853
 
 
 
1146
        
 
1147
        return Client.checker_callback(self, pid, condition, command,
 
1148
                                       *args, **kwargs)
 
1149
    
1854
1150
    def start_checker(self, *args, **kwargs):
1855
 
        old_checker_pid = getattr(self.checker, "pid", None)
 
1151
        old_checker = self.checker
 
1152
        if self.checker is not None:
 
1153
            old_checker_pid = self.checker.pid
 
1154
        else:
 
1155
            old_checker_pid = None
1856
1156
        r = Client.start_checker(self, *args, **kwargs)
1857
1157
        # Only if new checker process was started
1858
1158
        if (self.checker is not None
1860
1160
            # Emit D-Bus signal
1861
1161
            self.CheckerStarted(self.current_checker_command)
1862
1162
        return r
1863
 
 
 
1163
    
1864
1164
    def _reset_approved(self):
1865
1165
        self.approved = None
1866
1166
        return False
1867
 
 
 
1167
    
1868
1168
    def approve(self, value=True):
 
1169
        self.send_changedstate()
1869
1170
        self.approved = value
1870
 
        GLib.timeout_add(int(self.approval_duration.total_seconds()
1871
 
                             * 1000), self._reset_approved)
1872
 
        self.send_changedstate()
1873
 
 
1874
 
    #  D-Bus methods, signals & properties
1875
 
 
1876
 
    #  Interfaces
1877
 
 
1878
 
    #  Signals
1879
 
 
 
1171
        gobject.timeout_add(timedelta_to_milliseconds
 
1172
                            (self.approval_duration),
 
1173
                            self._reset_approved)
 
1174
    
 
1175
    
 
1176
    ## D-Bus methods, signals & properties
 
1177
    _interface = "se.recompile.Mandos.Client"
 
1178
    
 
1179
    ## Signals
 
1180
    
1880
1181
    # CheckerCompleted - signal
1881
1182
    @dbus.service.signal(_interface, signature="nxs")
1882
1183
    def CheckerCompleted(self, exitcode, waitstatus, command):
1883
1184
        "D-Bus signal"
1884
1185
        pass
1885
 
 
 
1186
    
1886
1187
    # CheckerStarted - signal
1887
1188
    @dbus.service.signal(_interface, signature="s")
1888
1189
    def CheckerStarted(self, command):
1889
1190
        "D-Bus signal"
1890
1191
        pass
1891
 
 
 
1192
    
1892
1193
    # PropertyChanged - signal
1893
 
    @dbus_annotations({"org.freedesktop.DBus.Deprecated": "true"})
1894
1194
    @dbus.service.signal(_interface, signature="sv")
1895
1195
    def PropertyChanged(self, property, value):
1896
1196
        "D-Bus signal"
1897
1197
        pass
1898
 
 
 
1198
    
1899
1199
    # GotSecret - signal
1900
1200
    @dbus.service.signal(_interface)
1901
1201
    def GotSecret(self):
1904
1204
        server to mandos-client
1905
1205
        """
1906
1206
        pass
1907
 
 
 
1207
    
1908
1208
    # Rejected - signal
1909
1209
    @dbus.service.signal(_interface, signature="s")
1910
1210
    def Rejected(self, reason):
1911
1211
        "D-Bus signal"
1912
1212
        pass
1913
 
 
 
1213
    
1914
1214
    # NeedApproval - signal
1915
1215
    @dbus.service.signal(_interface, signature="tb")
1916
1216
    def NeedApproval(self, timeout, default):
1917
1217
        "D-Bus signal"
1918
1218
        return self.need_approval()
1919
 
 
1920
 
    #  Methods
1921
 
 
 
1219
    
 
1220
    # NeRwequest - signal
 
1221
    @dbus.service.signal(_interface, signature="s")
 
1222
    def NewRequest(self, ip):
 
1223
        """D-Bus signal
 
1224
        Is sent after a client request a password.
 
1225
        """
 
1226
        pass
 
1227
    
 
1228
    ## Methods
 
1229
    
1922
1230
    # Approve - method
1923
1231
    @dbus.service.method(_interface, in_signature="b")
1924
1232
    def Approve(self, value):
1925
1233
        self.approve(value)
1926
 
 
 
1234
    
1927
1235
    # CheckedOK - method
1928
1236
    @dbus.service.method(_interface)
1929
1237
    def CheckedOK(self):
1930
1238
        self.checked_ok()
1931
 
 
 
1239
    
1932
1240
    # Enable - method
1933
 
    @dbus_annotations({"org.freedesktop.DBus.Deprecated": "true"})
1934
1241
    @dbus.service.method(_interface)
1935
1242
    def Enable(self):
1936
1243
        "D-Bus method"
1937
1244
        self.enable()
1938
 
 
 
1245
    
1939
1246
    # StartChecker - method
1940
 
    @dbus_annotations({"org.freedesktop.DBus.Deprecated": "true"})
1941
1247
    @dbus.service.method(_interface)
1942
1248
    def StartChecker(self):
1943
1249
        "D-Bus method"
1944
1250
        self.start_checker()
1945
 
 
 
1251
    
1946
1252
    # Disable - method
1947
 
    @dbus_annotations({"org.freedesktop.DBus.Deprecated": "true"})
1948
1253
    @dbus.service.method(_interface)
1949
1254
    def Disable(self):
1950
1255
        "D-Bus method"
1951
1256
        self.disable()
1952
 
 
 
1257
    
1953
1258
    # StopChecker - method
1954
 
    @dbus_annotations({"org.freedesktop.DBus.Deprecated": "true"})
1955
1259
    @dbus.service.method(_interface)
1956
1260
    def StopChecker(self):
1957
1261
        self.stop_checker()
1958
 
 
1959
 
    #  Properties
1960
 
 
 
1262
    
 
1263
    ## Properties
 
1264
    
1961
1265
    # ApprovalPending - property
1962
1266
    @dbus_service_property(_interface, signature="b", access="read")
1963
1267
    def ApprovalPending_dbus_property(self):
1964
1268
        return dbus.Boolean(bool(self.approvals_pending))
1965
 
 
 
1269
    
1966
1270
    # ApprovedByDefault - property
1967
 
    @dbus_service_property(_interface,
1968
 
                           signature="b",
 
1271
    @dbus_service_property(_interface, signature="b",
1969
1272
                           access="readwrite")
1970
1273
    def ApprovedByDefault_dbus_property(self, value=None):
1971
1274
        if value is None:       # get
1972
1275
            return dbus.Boolean(self.approved_by_default)
1973
1276
        self.approved_by_default = bool(value)
1974
 
 
 
1277
    
1975
1278
    # ApprovalDelay - property
1976
 
    @dbus_service_property(_interface,
1977
 
                           signature="t",
 
1279
    @dbus_service_property(_interface, signature="t",
1978
1280
                           access="readwrite")
1979
1281
    def ApprovalDelay_dbus_property(self, value=None):
1980
1282
        if value is None:       # get
1981
 
            return dbus.UInt64(self.approval_delay.total_seconds()
1982
 
                               * 1000)
 
1283
            return dbus.UInt64(self.approval_delay_milliseconds())
1983
1284
        self.approval_delay = datetime.timedelta(0, 0, 0, value)
1984
 
 
 
1285
    
1985
1286
    # ApprovalDuration - property
1986
 
    @dbus_service_property(_interface,
1987
 
                           signature="t",
 
1287
    @dbus_service_property(_interface, signature="t",
1988
1288
                           access="readwrite")
1989
1289
    def ApprovalDuration_dbus_property(self, value=None):
1990
1290
        if value is None:       # get
1991
 
            return dbus.UInt64(self.approval_duration.total_seconds()
1992
 
                               * 1000)
 
1291
            return dbus.UInt64(timedelta_to_milliseconds(
 
1292
                    self.approval_duration))
1993
1293
        self.approval_duration = datetime.timedelta(0, 0, 0, value)
1994
 
 
 
1294
    
1995
1295
    # Name - property
1996
 
    @dbus_annotations(
1997
 
        {"org.freedesktop.DBus.Property.EmitsChangedSignal": "const"})
1998
1296
    @dbus_service_property(_interface, signature="s", access="read")
1999
1297
    def Name_dbus_property(self):
2000
1298
        return dbus.String(self.name)
2001
 
 
 
1299
    
2002
1300
    # Fingerprint - property
2003
 
    @dbus_annotations(
2004
 
        {"org.freedesktop.DBus.Property.EmitsChangedSignal": "const"})
2005
1301
    @dbus_service_property(_interface, signature="s", access="read")
2006
1302
    def Fingerprint_dbus_property(self):
2007
1303
        return dbus.String(self.fingerprint)
2008
 
 
 
1304
    
2009
1305
    # Host - property
2010
 
    @dbus_service_property(_interface,
2011
 
                           signature="s",
 
1306
    @dbus_service_property(_interface, signature="s",
2012
1307
                           access="readwrite")
2013
1308
    def Host_dbus_property(self, value=None):
2014
1309
        if value is None:       # get
2015
1310
            return dbus.String(self.host)
2016
 
        self.host = str(value)
2017
 
 
 
1311
        self.host = unicode(value)
 
1312
    
2018
1313
    # Created - property
2019
 
    @dbus_annotations(
2020
 
        {"org.freedesktop.DBus.Property.EmitsChangedSignal": "const"})
2021
1314
    @dbus_service_property(_interface, signature="s", access="read")
2022
1315
    def Created_dbus_property(self):
2023
1316
        return datetime_to_dbus(self.created)
2024
 
 
 
1317
    
2025
1318
    # LastEnabled - property
2026
1319
    @dbus_service_property(_interface, signature="s", access="read")
2027
1320
    def LastEnabled_dbus_property(self):
2028
1321
        return datetime_to_dbus(self.last_enabled)
2029
 
 
 
1322
    
2030
1323
    # Enabled - property
2031
 
    @dbus_service_property(_interface,
2032
 
                           signature="b",
 
1324
    @dbus_service_property(_interface, signature="b",
2033
1325
                           access="readwrite")
2034
1326
    def Enabled_dbus_property(self, value=None):
2035
1327
        if value is None:       # get
2038
1330
            self.enable()
2039
1331
        else:
2040
1332
            self.disable()
2041
 
 
 
1333
    
2042
1334
    # LastCheckedOK - property
2043
 
    @dbus_service_property(_interface,
2044
 
                           signature="s",
 
1335
    @dbus_service_property(_interface, signature="s",
2045
1336
                           access="readwrite")
2046
1337
    def LastCheckedOK_dbus_property(self, value=None):
2047
1338
        if value is not None:
2048
1339
            self.checked_ok()
2049
1340
            return
2050
1341
        return datetime_to_dbus(self.last_checked_ok)
2051
 
 
2052
 
    # LastCheckerStatus - property
2053
 
    @dbus_service_property(_interface, signature="n", access="read")
2054
 
    def LastCheckerStatus_dbus_property(self):
2055
 
        return dbus.Int16(self.last_checker_status)
2056
 
 
 
1342
    
2057
1343
    # Expires - property
2058
1344
    @dbus_service_property(_interface, signature="s", access="read")
2059
1345
    def Expires_dbus_property(self):
2060
1346
        return datetime_to_dbus(self.expires)
2061
 
 
 
1347
    
2062
1348
    # LastApprovalRequest - property
2063
1349
    @dbus_service_property(_interface, signature="s", access="read")
2064
1350
    def LastApprovalRequest_dbus_property(self):
2065
1351
        return datetime_to_dbus(self.last_approval_request)
2066
 
 
 
1352
    
2067
1353
    # Timeout - property
2068
 
    @dbus_service_property(_interface,
2069
 
                           signature="t",
 
1354
    @dbus_service_property(_interface, signature="t",
2070
1355
                           access="readwrite")
2071
1356
    def Timeout_dbus_property(self, value=None):
2072
1357
        if value is None:       # get
2073
 
            return dbus.UInt64(self.timeout.total_seconds() * 1000)
2074
 
        old_timeout = self.timeout
 
1358
            return dbus.UInt64(self.timeout_milliseconds())
2075
1359
        self.timeout = datetime.timedelta(0, 0, 0, value)
2076
 
        # Reschedule disabling
2077
 
        if self.enabled:
2078
 
            now = datetime.datetime.utcnow()
2079
 
            self.expires += self.timeout - old_timeout
2080
 
            if self.expires <= now:
2081
 
                # The timeout has passed
2082
 
                self.disable()
2083
 
            else:
2084
 
                if (getattr(self, "disable_initiator_tag", None)
2085
 
                    is None):
2086
 
                    return
2087
 
                GLib.source_remove(self.disable_initiator_tag)
2088
 
                self.disable_initiator_tag = GLib.timeout_add(
2089
 
                    int((self.expires - now).total_seconds() * 1000),
2090
 
                    self.disable)
2091
 
 
 
1360
        if getattr(self, "disable_initiator_tag", None) is None:
 
1361
            return
 
1362
        # Reschedule timeout
 
1363
        gobject.source_remove(self.disable_initiator_tag)
 
1364
        self.disable_initiator_tag = None
 
1365
        self.expires = None
 
1366
        time_to_die = timedelta_to_milliseconds((self
 
1367
                                                 .last_checked_ok
 
1368
                                                 + self.timeout)
 
1369
                                                - datetime.datetime
 
1370
                                                .utcnow())
 
1371
        if time_to_die <= 0:
 
1372
            # The timeout has passed
 
1373
            self.disable()
 
1374
        else:
 
1375
            self.expires = (datetime.datetime.utcnow()
 
1376
                            + datetime.timedelta(milliseconds =
 
1377
                                                 time_to_die))
 
1378
            self.disable_initiator_tag = (gobject.timeout_add
 
1379
                                          (time_to_die, self.disable))
 
1380
    
2092
1381
    # ExtendedTimeout - property
2093
 
    @dbus_service_property(_interface,
2094
 
                           signature="t",
 
1382
    @dbus_service_property(_interface, signature="t",
2095
1383
                           access="readwrite")
2096
1384
    def ExtendedTimeout_dbus_property(self, value=None):
2097
1385
        if value is None:       # get
2098
 
            return dbus.UInt64(self.extended_timeout.total_seconds()
2099
 
                               * 1000)
 
1386
            return dbus.UInt64(self.extended_timeout_milliseconds())
2100
1387
        self.extended_timeout = datetime.timedelta(0, 0, 0, value)
2101
 
 
 
1388
    
2102
1389
    # Interval - property
2103
 
    @dbus_service_property(_interface,
2104
 
                           signature="t",
 
1390
    @dbus_service_property(_interface, signature="t",
2105
1391
                           access="readwrite")
2106
1392
    def Interval_dbus_property(self, value=None):
2107
1393
        if value is None:       # get
2108
 
            return dbus.UInt64(self.interval.total_seconds() * 1000)
 
1394
            return dbus.UInt64(self.interval_milliseconds())
2109
1395
        self.interval = datetime.timedelta(0, 0, 0, value)
2110
1396
        if getattr(self, "checker_initiator_tag", None) is None:
2111
1397
            return
2112
1398
        if self.enabled:
2113
1399
            # Reschedule checker run
2114
 
            GLib.source_remove(self.checker_initiator_tag)
2115
 
            self.checker_initiator_tag = GLib.timeout_add(
2116
 
                value, self.start_checker)
2117
 
            self.start_checker()  # Start one now, too
2118
 
 
 
1400
            gobject.source_remove(self.checker_initiator_tag)
 
1401
            self.checker_initiator_tag = (gobject.timeout_add
 
1402
                                          (value, self.start_checker))
 
1403
            self.start_checker()    # Start one now, too
 
1404
    
2119
1405
    # Checker - property
2120
 
    @dbus_service_property(_interface,
2121
 
                           signature="s",
 
1406
    @dbus_service_property(_interface, signature="s",
2122
1407
                           access="readwrite")
2123
1408
    def Checker_dbus_property(self, value=None):
2124
1409
        if value is None:       # get
2125
1410
            return dbus.String(self.checker_command)
2126
 
        self.checker_command = str(value)
2127
 
 
 
1411
        self.checker_command = unicode(value)
 
1412
    
2128
1413
    # CheckerRunning - property
2129
 
    @dbus_service_property(_interface,
2130
 
                           signature="b",
 
1414
    @dbus_service_property(_interface, signature="b",
2131
1415
                           access="readwrite")
2132
1416
    def CheckerRunning_dbus_property(self, value=None):
2133
1417
        if value is None:       # get
2136
1420
            self.start_checker()
2137
1421
        else:
2138
1422
            self.stop_checker()
2139
 
 
 
1423
    
2140
1424
    # ObjectPath - property
2141
 
    @dbus_annotations(
2142
 
        {"org.freedesktop.DBus.Property.EmitsChangedSignal": "const",
2143
 
         "org.freedesktop.DBus.Deprecated": "true"})
2144
1425
    @dbus_service_property(_interface, signature="o", access="read")
2145
1426
    def ObjectPath_dbus_property(self):
2146
 
        return self.dbus_object_path  # is already a dbus.ObjectPath
2147
 
 
 
1427
        return self.dbus_object_path # is already a dbus.ObjectPath
 
1428
    
2148
1429
    # Secret = property
2149
 
    @dbus_annotations(
2150
 
        {"org.freedesktop.DBus.Property.EmitsChangedSignal":
2151
 
         "invalidates"})
2152
 
    @dbus_service_property(_interface,
2153
 
                           signature="ay",
2154
 
                           access="write",
2155
 
                           byte_arrays=True)
 
1430
    @dbus_service_property(_interface, signature="ay",
 
1431
                           access="write", byte_arrays=True)
2156
1432
    def Secret_dbus_property(self, value):
2157
 
        self.secret = bytes(value)
2158
 
 
 
1433
        self.secret = str(value)
 
1434
    
2159
1435
    del _interface
2160
1436
 
2161
1437
 
2164
1440
        self._pipe = child_pipe
2165
1441
        self._pipe.send(('init', fpr, address))
2166
1442
        if not self._pipe.recv():
2167
 
            raise KeyError(fpr)
2168
 
 
 
1443
            raise KeyError()
 
1444
    
2169
1445
    def __getattribute__(self, name):
2170
1446
        if name == '_pipe':
2171
1447
            return super(ProxyClient, self).__getattribute__(name)
2174
1450
        if data[0] == 'data':
2175
1451
            return data[1]
2176
1452
        if data[0] == 'function':
2177
 
 
2178
1453
            def func(*args, **kwargs):
2179
1454
                self._pipe.send(('funcall', name, args, kwargs))
2180
1455
                return self._pipe.recv()[1]
2181
 
 
2182
1456
            return func
2183
 
 
 
1457
    
2184
1458
    def __setattr__(self, name, value):
2185
1459
        if name == '_pipe':
2186
1460
            return super(ProxyClient, self).__setattr__(name, value)
2187
1461
        self._pipe.send(('setattr', name, value))
2188
1462
 
2189
1463
 
 
1464
class ClientDBusTransitional(ClientDBus):
 
1465
    __metaclass__ = AlternateDBusNamesMetaclass
 
1466
 
 
1467
 
2190
1468
class ClientHandler(socketserver.BaseRequestHandler, object):
2191
1469
    """A class to handle client connections.
2192
 
 
 
1470
    
2193
1471
    Instantiated once for each connection to handle it.
2194
1472
    Note: This will run in its own forked process."""
2195
 
 
 
1473
    
2196
1474
    def handle(self):
2197
1475
        with contextlib.closing(self.server.child_pipe) as child_pipe:
2198
1476
            logger.info("TCP connection from: %s",
2199
 
                        str(self.client_address))
 
1477
                        unicode(self.client_address))
2200
1478
            logger.debug("Pipe FD: %d",
2201
1479
                         self.server.child_pipe.fileno())
2202
 
 
2203
 
            session = gnutls.ClientSession(self.request)
2204
 
 
2205
 
            # priority = ':'.join(("NONE", "+VERS-TLS1.1",
2206
 
            #                       "+AES-256-CBC", "+SHA1",
2207
 
            #                       "+COMP-NULL", "+CTYPE-OPENPGP",
2208
 
            #                       "+DHE-DSS"))
 
1480
            
 
1481
            session = (gnutls.connection
 
1482
                       .ClientSession(self.request,
 
1483
                                      gnutls.connection
 
1484
                                      .X509Credentials()))
 
1485
            
 
1486
            # Note: gnutls.connection.X509Credentials is really a
 
1487
            # generic GnuTLS certificate credentials object so long as
 
1488
            # no X.509 keys are added to it.  Therefore, we can use it
 
1489
            # here despite using OpenPGP certificates.
 
1490
            
 
1491
            #priority = ':'.join(("NONE", "+VERS-TLS1.1",
 
1492
            #                      "+AES-256-CBC", "+SHA1",
 
1493
            #                      "+COMP-NULL", "+CTYPE-OPENPGP",
 
1494
            #                      "+DHE-DSS"))
2209
1495
            # Use a fallback default, since this MUST be set.
2210
1496
            priority = self.server.gnutls_priority
2211
1497
            if priority is None:
2212
1498
                priority = "NORMAL"
2213
 
            gnutls.priority_set_direct(session._c_object,
2214
 
                                       priority.encode("utf-8"),
2215
 
                                       None)
2216
 
 
 
1499
            (gnutls.library.functions
 
1500
             .gnutls_priority_set_direct(session._c_object,
 
1501
                                         priority, None))
 
1502
            
2217
1503
            # Start communication using the Mandos protocol
2218
1504
            # Get protocol number
2219
1505
            line = self.request.makefile().readline()
2220
1506
            logger.debug("Protocol version: %r", line)
2221
1507
            try:
2222
1508
                if int(line.strip().split()[0]) > 1:
2223
 
                    raise RuntimeError(line)
 
1509
                    raise RuntimeError
2224
1510
            except (ValueError, IndexError, RuntimeError) as error:
2225
1511
                logger.error("Unknown protocol version: %s", error)
2226
1512
                return
2227
 
 
 
1513
            
2228
1514
            # Start GnuTLS connection
2229
1515
            try:
2230
1516
                session.handshake()
2231
 
            except gnutls.Error as error:
 
1517
            except gnutls.errors.GNUTLSError as error:
2232
1518
                logger.warning("Handshake failed: %s", error)
2233
1519
                # Do not run session.bye() here: the session is not
2234
1520
                # established.  Just abandon the request.
2235
1521
                return
2236
1522
            logger.debug("Handshake succeeded")
2237
 
 
 
1523
            
2238
1524
            approval_required = False
2239
1525
            try:
2240
1526
                try:
2241
 
                    fpr = self.fingerprint(
2242
 
                        self.peer_certificate(session))
2243
 
                except (TypeError, gnutls.Error) as error:
 
1527
                    fpr = self.fingerprint(self.peer_certificate
 
1528
                                           (session))
 
1529
                except (TypeError,
 
1530
                        gnutls.errors.GNUTLSError) as error:
2244
1531
                    logger.warning("Bad certificate: %s", error)
2245
1532
                    return
2246
1533
                logger.debug("Fingerprint: %s", fpr)
2247
 
 
 
1534
                
2248
1535
                try:
2249
1536
                    client = ProxyClient(child_pipe, fpr,
2250
1537
                                         self.client_address)
2251
1538
                except KeyError:
2252
1539
                    return
2253
 
 
 
1540
                
 
1541
                if self.server.use_dbus:
 
1542
                    # Emit D-Bus signal
 
1543
                    client.NewRequest(str(self.client_address))
 
1544
                
2254
1545
                if client.approval_delay:
2255
1546
                    delay = client.approval_delay
2256
1547
                    client.approvals_pending += 1
2257
1548
                    approval_required = True
2258
 
 
 
1549
                
2259
1550
                while True:
2260
1551
                    if not client.enabled:
2261
1552
                        logger.info("Client %s is disabled",
2262
 
                                    client.name)
 
1553
                                       client.name)
2263
1554
                        if self.server.use_dbus:
2264
1555
                            # Emit D-Bus signal
2265
1556
                            client.Rejected("Disabled")
2266
1557
                        return
2267
 
 
 
1558
                    
2268
1559
                    if client.approved or not client.approval_delay:
2269
 
                        # We are approved or approval is disabled
 
1560
                        #We are approved or approval is disabled
2270
1561
                        break
2271
1562
                    elif client.approved is None:
2272
1563
                        logger.info("Client %s needs approval",
2274
1565
                        if self.server.use_dbus:
2275
1566
                            # Emit D-Bus signal
2276
1567
                            client.NeedApproval(
2277
 
                                client.approval_delay.total_seconds()
2278
 
                                * 1000, client.approved_by_default)
 
1568
                                client.approval_delay_milliseconds(),
 
1569
                                client.approved_by_default)
2279
1570
                    else:
2280
1571
                        logger.warning("Client %s was not approved",
2281
1572
                                       client.name)
2283
1574
                            # Emit D-Bus signal
2284
1575
                            client.Rejected("Denied")
2285
1576
                        return
2286
 
 
2287
 
                    # wait until timeout or approved
 
1577
                    
 
1578
                    #wait until timeout or approved
2288
1579
                    time = datetime.datetime.now()
2289
1580
                    client.changedstate.acquire()
2290
 
                    client.changedstate.wait(delay.total_seconds())
 
1581
                    (client.changedstate.wait
 
1582
                     (float(client.timedelta_to_milliseconds(delay)
 
1583
                            / 1000)))
2291
1584
                    client.changedstate.release()
2292
1585
                    time2 = datetime.datetime.now()
2293
1586
                    if (time2 - time) >= delay:
2303
1596
                            break
2304
1597
                    else:
2305
1598
                        delay -= time2 - time
2306
 
 
2307
 
                try:
2308
 
                    session.send(client.secret)
2309
 
                except gnutls.Error as error:
2310
 
                    logger.warning("gnutls send failed",
2311
 
                                   exc_info=error)
2312
 
                    return
2313
 
 
 
1599
                
 
1600
                sent_size = 0
 
1601
                while sent_size < len(client.secret):
 
1602
                    try:
 
1603
                        sent = session.send(client.secret[sent_size:])
 
1604
                    except gnutls.errors.GNUTLSError as error:
 
1605
                        logger.warning("gnutls send failed")
 
1606
                        return
 
1607
                    logger.debug("Sent: %d, remaining: %d",
 
1608
                                 sent, len(client.secret)
 
1609
                                 - (sent_size + sent))
 
1610
                    sent_size += sent
 
1611
                
2314
1612
                logger.info("Sending secret to %s", client.name)
2315
1613
                # bump the timeout using extended_timeout
2316
 
                client.bump_timeout(client.extended_timeout)
 
1614
                client.checked_ok(client.extended_timeout)
2317
1615
                if self.server.use_dbus:
2318
1616
                    # Emit D-Bus signal
2319
1617
                    client.GotSecret()
2320
 
 
 
1618
            
2321
1619
            finally:
2322
1620
                if approval_required:
2323
1621
                    client.approvals_pending -= 1
2324
1622
                try:
2325
1623
                    session.bye()
2326
 
                except gnutls.Error as error:
2327
 
                    logger.warning("GnuTLS bye failed",
2328
 
                                   exc_info=error)
2329
 
 
 
1624
                except gnutls.errors.GNUTLSError as error:
 
1625
                    logger.warning("GnuTLS bye failed")
 
1626
    
2330
1627
    @staticmethod
2331
1628
    def peer_certificate(session):
2332
1629
        "Return the peer's OpenPGP certificate as a bytestring"
2333
1630
        # If not an OpenPGP certificate...
2334
 
        if (gnutls.certificate_type_get(session._c_object)
2335
 
            != gnutls.CRT_OPENPGP):
2336
 
            # ...return invalid data
2337
 
            return b""
 
1631
        if (gnutls.library.functions
 
1632
            .gnutls_certificate_type_get(session._c_object)
 
1633
            != gnutls.library.constants.GNUTLS_CRT_OPENPGP):
 
1634
            # ...do the normal thing
 
1635
            return session.peer_certificate
2338
1636
        list_size = ctypes.c_uint(1)
2339
 
        cert_list = (gnutls.certificate_get_peers
 
1637
        cert_list = (gnutls.library.functions
 
1638
                     .gnutls_certificate_get_peers
2340
1639
                     (session._c_object, ctypes.byref(list_size)))
2341
1640
        if not bool(cert_list) and list_size.value != 0:
2342
 
            raise gnutls.Error("error getting peer certificate")
 
1641
            raise gnutls.errors.GNUTLSError("error getting peer"
 
1642
                                            " certificate")
2343
1643
        if list_size.value == 0:
2344
1644
            return None
2345
1645
        cert = cert_list[0]
2346
1646
        return ctypes.string_at(cert.data, cert.size)
2347
 
 
 
1647
    
2348
1648
    @staticmethod
2349
1649
    def fingerprint(openpgp):
2350
1650
        "Convert an OpenPGP bytestring to a hexdigit fingerprint"
2351
1651
        # New GnuTLS "datum" with the OpenPGP public key
2352
 
        datum = gnutls.datum_t(
2353
 
            ctypes.cast(ctypes.c_char_p(openpgp),
2354
 
                        ctypes.POINTER(ctypes.c_ubyte)),
2355
 
            ctypes.c_uint(len(openpgp)))
 
1652
        datum = (gnutls.library.types
 
1653
                 .gnutls_datum_t(ctypes.cast(ctypes.c_char_p(openpgp),
 
1654
                                             ctypes.POINTER
 
1655
                                             (ctypes.c_ubyte)),
 
1656
                                 ctypes.c_uint(len(openpgp))))
2356
1657
        # New empty GnuTLS certificate
2357
 
        crt = gnutls.openpgp_crt_t()
2358
 
        gnutls.openpgp_crt_init(ctypes.byref(crt))
 
1658
        crt = gnutls.library.types.gnutls_openpgp_crt_t()
 
1659
        (gnutls.library.functions
 
1660
         .gnutls_openpgp_crt_init(ctypes.byref(crt)))
2359
1661
        # Import the OpenPGP public key into the certificate
2360
 
        gnutls.openpgp_crt_import(crt, ctypes.byref(datum),
2361
 
                                  gnutls.OPENPGP_FMT_RAW)
 
1662
        (gnutls.library.functions
 
1663
         .gnutls_openpgp_crt_import(crt, ctypes.byref(datum),
 
1664
                                    gnutls.library.constants
 
1665
                                    .GNUTLS_OPENPGP_FMT_RAW))
2362
1666
        # Verify the self signature in the key
2363
1667
        crtverify = ctypes.c_uint()
2364
 
        gnutls.openpgp_crt_verify_self(crt, 0,
2365
 
                                       ctypes.byref(crtverify))
 
1668
        (gnutls.library.functions
 
1669
         .gnutls_openpgp_crt_verify_self(crt, 0,
 
1670
                                         ctypes.byref(crtverify)))
2366
1671
        if crtverify.value != 0:
2367
 
            gnutls.openpgp_crt_deinit(crt)
2368
 
            raise gnutls.CertificateSecurityError("Verify failed")
 
1672
            gnutls.library.functions.gnutls_openpgp_crt_deinit(crt)
 
1673
            raise (gnutls.errors.CertificateSecurityError
 
1674
                   ("Verify failed"))
2369
1675
        # New buffer for the fingerprint
2370
1676
        buf = ctypes.create_string_buffer(20)
2371
1677
        buf_len = ctypes.c_size_t()
2372
1678
        # Get the fingerprint from the certificate into the buffer
2373
 
        gnutls.openpgp_crt_get_fingerprint(crt, ctypes.byref(buf),
2374
 
                                           ctypes.byref(buf_len))
 
1679
        (gnutls.library.functions
 
1680
         .gnutls_openpgp_crt_get_fingerprint(crt, ctypes.byref(buf),
 
1681
                                             ctypes.byref(buf_len)))
2375
1682
        # Deinit the certificate
2376
 
        gnutls.openpgp_crt_deinit(crt)
 
1683
        gnutls.library.functions.gnutls_openpgp_crt_deinit(crt)
2377
1684
        # Convert the buffer to a Python bytestring
2378
1685
        fpr = ctypes.string_at(buf, buf_len.value)
2379
1686
        # Convert the bytestring to hexadecimal notation
2383
1690
 
2384
1691
class MultiprocessingMixIn(object):
2385
1692
    """Like socketserver.ThreadingMixIn, but with multiprocessing"""
2386
 
 
2387
1693
    def sub_process_main(self, request, address):
2388
1694
        try:
2389
1695
            self.finish_request(request, address)
2390
1696
        except Exception:
2391
1697
            self.handle_error(request, address)
2392
1698
        self.close_request(request)
2393
 
 
 
1699
    
2394
1700
    def process_request(self, request, address):
2395
1701
        """Start a new process to process the request."""
2396
 
        proc = multiprocessing.Process(target=self.sub_process_main,
2397
 
                                       args=(request, address))
 
1702
        proc = multiprocessing.Process(target = self.sub_process_main,
 
1703
                                       args = (request,
 
1704
                                               address))
2398
1705
        proc.start()
2399
1706
        return proc
2400
1707
 
2401
1708
 
2402
1709
class MultiprocessingMixInWithPipe(MultiprocessingMixIn, object):
2403
1710
    """ adds a pipe to the MixIn """
2404
 
 
2405
1711
    def process_request(self, request, client_address):
2406
1712
        """Overrides and wraps the original process_request().
2407
 
 
 
1713
        
2408
1714
        This function creates a new pipe in self.pipe
2409
1715
        """
2410
1716
        parent_pipe, self.child_pipe = multiprocessing.Pipe()
2411
 
 
 
1717
        
2412
1718
        proc = MultiprocessingMixIn.process_request(self, request,
2413
1719
                                                    client_address)
2414
1720
        self.child_pipe.close()
2415
1721
        self.add_pipe(parent_pipe, proc)
2416
 
 
 
1722
    
2417
1723
    def add_pipe(self, parent_pipe, proc):
2418
1724
        """Dummy function; override as necessary"""
2419
 
        raise NotImplementedError()
 
1725
        raise NotImplementedError
2420
1726
 
2421
1727
 
2422
1728
class IPv6_TCPServer(MultiprocessingMixInWithPipe,
2423
1729
                     socketserver.TCPServer, object):
2424
1730
    """IPv6-capable TCP server.  Accepts 'None' as address and/or port
2425
 
 
 
1731
    
2426
1732
    Attributes:
2427
1733
        enabled:        Boolean; whether this server is activated yet
2428
1734
        interface:      None or a network interface name (string)
2429
1735
        use_ipv6:       Boolean; to use IPv6 or not
2430
1736
    """
2431
 
 
2432
1737
    def __init__(self, server_address, RequestHandlerClass,
2433
 
                 interface=None,
2434
 
                 use_ipv6=True,
2435
 
                 socketfd=None):
2436
 
        """If socketfd is set, use that file descriptor instead of
2437
 
        creating a new one with socket.socket().
2438
 
        """
 
1738
                 interface=None, use_ipv6=True):
2439
1739
        self.interface = interface
2440
1740
        if use_ipv6:
2441
1741
            self.address_family = socket.AF_INET6
2442
 
        if socketfd is not None:
2443
 
            # Save the file descriptor
2444
 
            self.socketfd = socketfd
2445
 
            # Save the original socket.socket() function
2446
 
            self.socket_socket = socket.socket
2447
 
 
2448
 
            # To implement --socket, we monkey patch socket.socket.
2449
 
            #
2450
 
            # (When socketserver.TCPServer is a new-style class, we
2451
 
            # could make self.socket into a property instead of monkey
2452
 
            # patching socket.socket.)
2453
 
            #
2454
 
            # Create a one-time-only replacement for socket.socket()
2455
 
            @functools.wraps(socket.socket)
2456
 
            def socket_wrapper(*args, **kwargs):
2457
 
                # Restore original function so subsequent calls are
2458
 
                # not affected.
2459
 
                socket.socket = self.socket_socket
2460
 
                del self.socket_socket
2461
 
                # This time only, return a new socket object from the
2462
 
                # saved file descriptor.
2463
 
                return socket.fromfd(self.socketfd, *args, **kwargs)
2464
 
            # Replace socket.socket() function with wrapper
2465
 
            socket.socket = socket_wrapper
2466
 
        # The socketserver.TCPServer.__init__ will call
2467
 
        # socket.socket(), which might be our replacement,
2468
 
        # socket_wrapper(), if socketfd was set.
2469
1742
        socketserver.TCPServer.__init__(self, server_address,
2470
1743
                                        RequestHandlerClass)
2471
 
 
2472
1744
    def server_bind(self):
2473
1745
        """This overrides the normal server_bind() function
2474
1746
        to bind to an interface if one was specified, and also NOT to
2475
1747
        bind to an address or port if they were not specified."""
2476
 
        global SO_BINDTODEVICE
2477
1748
        if self.interface is not None:
2478
1749
            if SO_BINDTODEVICE is None:
2479
 
                # Fall back to a hard-coded value which seems to be
2480
 
                # common enough.
2481
 
                logger.warning("SO_BINDTODEVICE not found, trying 25")
2482
 
                SO_BINDTODEVICE = 25
2483
 
            try:
2484
 
                self.socket.setsockopt(
2485
 
                    socket.SOL_SOCKET, SO_BINDTODEVICE,
2486
 
                    (self.interface + "\0").encode("utf-8"))
2487
 
            except socket.error as error:
2488
 
                if error.errno == errno.EPERM:
2489
 
                    logger.error("No permission to bind to"
2490
 
                                 " interface %s", self.interface)
2491
 
                elif error.errno == errno.ENOPROTOOPT:
2492
 
                    logger.error("SO_BINDTODEVICE not available;"
2493
 
                                 " cannot bind to interface %s",
2494
 
                                 self.interface)
2495
 
                elif error.errno == errno.ENODEV:
2496
 
                    logger.error("Interface %s does not exist,"
2497
 
                                 " cannot bind", self.interface)
2498
 
                else:
2499
 
                    raise
 
1750
                logger.error("SO_BINDTODEVICE does not exist;"
 
1751
                             " cannot bind to interface %s",
 
1752
                             self.interface)
 
1753
            else:
 
1754
                try:
 
1755
                    self.socket.setsockopt(socket.SOL_SOCKET,
 
1756
                                           SO_BINDTODEVICE,
 
1757
                                           str(self.interface
 
1758
                                               + '\0'))
 
1759
                except socket.error as error:
 
1760
                    if error[0] == errno.EPERM:
 
1761
                        logger.error("No permission to"
 
1762
                                     " bind to interface %s",
 
1763
                                     self.interface)
 
1764
                    elif error[0] == errno.ENOPROTOOPT:
 
1765
                        logger.error("SO_BINDTODEVICE not available;"
 
1766
                                     " cannot bind to interface %s",
 
1767
                                     self.interface)
 
1768
                    else:
 
1769
                        raise
2500
1770
        # Only bind(2) the socket if we really need to.
2501
1771
        if self.server_address[0] or self.server_address[1]:
2502
1772
            if not self.server_address[0]:
2503
1773
                if self.address_family == socket.AF_INET6:
2504
 
                    any_address = "::"  # in6addr_any
 
1774
                    any_address = "::" # in6addr_any
2505
1775
                else:
2506
 
                    any_address = "0.0.0.0"  # INADDR_ANY
 
1776
                    any_address = socket.INADDR_ANY
2507
1777
                self.server_address = (any_address,
2508
1778
                                       self.server_address[1])
2509
1779
            elif not self.server_address[1]:
2510
 
                self.server_address = (self.server_address[0], 0)
 
1780
                self.server_address = (self.server_address[0],
 
1781
                                       0)
2511
1782
#                 if self.interface:
2512
1783
#                     self.server_address = (self.server_address[0],
2513
1784
#                                            0, # port
2519
1790
 
2520
1791
class MandosServer(IPv6_TCPServer):
2521
1792
    """Mandos server.
2522
 
 
 
1793
    
2523
1794
    Attributes:
2524
1795
        clients:        set of Client objects
2525
1796
        gnutls_priority GnuTLS priority string
2526
1797
        use_dbus:       Boolean; to emit D-Bus signals or not
2527
 
 
2528
 
    Assumes a GLib.MainLoop event loop.
 
1798
    
 
1799
    Assumes a gobject.MainLoop event loop.
2529
1800
    """
2530
 
 
2531
1801
    def __init__(self, server_address, RequestHandlerClass,
2532
 
                 interface=None,
2533
 
                 use_ipv6=True,
2534
 
                 clients=None,
2535
 
                 gnutls_priority=None,
2536
 
                 use_dbus=True,
2537
 
                 socketfd=None):
 
1802
                 interface=None, use_ipv6=True, clients=None,
 
1803
                 gnutls_priority=None, use_dbus=True):
2538
1804
        self.enabled = False
2539
1805
        self.clients = clients
2540
1806
        if self.clients is None:
2543
1809
        self.gnutls_priority = gnutls_priority
2544
1810
        IPv6_TCPServer.__init__(self, server_address,
2545
1811
                                RequestHandlerClass,
2546
 
                                interface=interface,
2547
 
                                use_ipv6=use_ipv6,
2548
 
                                socketfd=socketfd)
2549
 
 
 
1812
                                interface = interface,
 
1813
                                use_ipv6 = use_ipv6)
2550
1814
    def server_activate(self):
2551
1815
        if self.enabled:
2552
1816
            return socketserver.TCPServer.server_activate(self)
2553
 
 
 
1817
    
2554
1818
    def enable(self):
2555
1819
        self.enabled = True
2556
 
 
 
1820
    
2557
1821
    def add_pipe(self, parent_pipe, proc):
2558
1822
        # Call "handle_ipc" for both data and EOF events
2559
 
        GLib.io_add_watch(
2560
 
            parent_pipe.fileno(),
2561
 
            GLib.IO_IN | GLib.IO_HUP,
2562
 
            functools.partial(self.handle_ipc,
2563
 
                              parent_pipe=parent_pipe,
2564
 
                              proc=proc))
2565
 
 
2566
 
    def handle_ipc(self, source, condition,
2567
 
                   parent_pipe=None,
2568
 
                   proc=None,
2569
 
                   client_object=None):
 
1823
        gobject.io_add_watch(parent_pipe.fileno(),
 
1824
                             gobject.IO_IN | gobject.IO_HUP,
 
1825
                             functools.partial(self.handle_ipc,
 
1826
                                               parent_pipe =
 
1827
                                               parent_pipe,
 
1828
                                               proc = proc))
 
1829
    
 
1830
    def handle_ipc(self, source, condition, parent_pipe=None,
 
1831
                   proc = None, client_object=None):
 
1832
        condition_names = {
 
1833
            gobject.IO_IN: "IN",   # There is data to read.
 
1834
            gobject.IO_OUT: "OUT", # Data can be written (without
 
1835
                                    # blocking).
 
1836
            gobject.IO_PRI: "PRI", # There is urgent data to read.
 
1837
            gobject.IO_ERR: "ERR", # Error condition.
 
1838
            gobject.IO_HUP: "HUP"  # Hung up (the connection has been
 
1839
                                    # broken, usually for pipes and
 
1840
                                    # sockets).
 
1841
            }
 
1842
        conditions_string = ' | '.join(name
 
1843
                                       for cond, name in
 
1844
                                       condition_names.iteritems()
 
1845
                                       if cond & condition)
2570
1846
        # error, or the other end of multiprocessing.Pipe has closed
2571
 
        if condition & (GLib.IO_ERR | GLib.IO_HUP):
 
1847
        if condition & (gobject.IO_ERR | condition & gobject.IO_HUP):
2572
1848
            # Wait for other process to exit
2573
1849
            proc.join()
2574
1850
            return False
2575
 
 
 
1851
        
2576
1852
        # Read a request from the child
2577
1853
        request = parent_pipe.recv()
2578
1854
        command = request[0]
2579
 
 
 
1855
        
2580
1856
        if command == 'init':
2581
 
            fpr = request[1].decode("ascii")
 
1857
            fpr = request[1]
2582
1858
            address = request[2]
2583
 
 
2584
 
            for c in self.clients.values():
 
1859
            
 
1860
            for c in self.clients.itervalues():
2585
1861
                if c.fingerprint == fpr:
2586
1862
                    client = c
2587
1863
                    break
2594
1870
                                                       address[0])
2595
1871
                parent_pipe.send(False)
2596
1872
                return False
2597
 
 
2598
 
            GLib.io_add_watch(
2599
 
                parent_pipe.fileno(),
2600
 
                GLib.IO_IN | GLib.IO_HUP,
2601
 
                functools.partial(self.handle_ipc,
2602
 
                                  parent_pipe=parent_pipe,
2603
 
                                  proc=proc,
2604
 
                                  client_object=client))
 
1873
            
 
1874
            gobject.io_add_watch(parent_pipe.fileno(),
 
1875
                                 gobject.IO_IN | gobject.IO_HUP,
 
1876
                                 functools.partial(self.handle_ipc,
 
1877
                                                   parent_pipe =
 
1878
                                                   parent_pipe,
 
1879
                                                   proc = proc,
 
1880
                                                   client_object =
 
1881
                                                   client))
2605
1882
            parent_pipe.send(True)
2606
1883
            # remove the old hook in favor of the new above hook on
2607
1884
            # same fileno
2610
1887
            funcname = request[1]
2611
1888
            args = request[2]
2612
1889
            kwargs = request[3]
2613
 
 
 
1890
            
2614
1891
            parent_pipe.send(('data', getattr(client_object,
2615
1892
                                              funcname)(*args,
2616
 
                                                        **kwargs)))
2617
 
 
 
1893
                                                         **kwargs)))
 
1894
        
2618
1895
        if command == 'getattr':
2619
1896
            attrname = request[1]
2620
 
            if isinstance(client_object.__getattribute__(attrname),
2621
 
                          collections.Callable):
2622
 
                parent_pipe.send(('function', ))
 
1897
            if callable(client_object.__getattribute__(attrname)):
 
1898
                parent_pipe.send(('function',))
2623
1899
            else:
2624
 
                parent_pipe.send((
2625
 
                    'data', client_object.__getattribute__(attrname)))
2626
 
 
 
1900
                parent_pipe.send(('data', client_object
 
1901
                                  .__getattribute__(attrname)))
 
1902
        
2627
1903
        if command == 'setattr':
2628
1904
            attrname = request[1]
2629
1905
            value = request[2]
2630
1906
            setattr(client_object, attrname, value)
2631
 
 
 
1907
        
2632
1908
        return True
2633
1909
 
2634
1910
 
2635
 
def rfc3339_duration_to_delta(duration):
2636
 
    """Parse an RFC 3339 "duration" and return a datetime.timedelta
2637
 
 
2638
 
    >>> rfc3339_duration_to_delta("P7D")
2639
 
    datetime.timedelta(7)
2640
 
    >>> rfc3339_duration_to_delta("PT60S")
2641
 
    datetime.timedelta(0, 60)
2642
 
    >>> rfc3339_duration_to_delta("PT60M")
2643
 
    datetime.timedelta(0, 3600)
2644
 
    >>> rfc3339_duration_to_delta("PT24H")
2645
 
    datetime.timedelta(1)
2646
 
    >>> rfc3339_duration_to_delta("P1W")
2647
 
    datetime.timedelta(7)
2648
 
    >>> rfc3339_duration_to_delta("PT5M30S")
2649
 
    datetime.timedelta(0, 330)
2650
 
    >>> rfc3339_duration_to_delta("P1DT3M20S")
2651
 
    datetime.timedelta(1, 200)
2652
 
    """
2653
 
 
2654
 
    # Parsing an RFC 3339 duration with regular expressions is not
2655
 
    # possible - there would have to be multiple places for the same
2656
 
    # values, like seconds.  The current code, while more esoteric, is
2657
 
    # cleaner without depending on a parsing library.  If Python had a
2658
 
    # built-in library for parsing we would use it, but we'd like to
2659
 
    # avoid excessive use of external libraries.
2660
 
 
2661
 
    # New type for defining tokens, syntax, and semantics all-in-one
2662
 
    Token = collections.namedtuple("Token", (
2663
 
        "regexp",  # To match token; if "value" is not None, must have
2664
 
                   # a "group" containing digits
2665
 
        "value",   # datetime.timedelta or None
2666
 
        "followers"))           # Tokens valid after this token
2667
 
    # RFC 3339 "duration" tokens, syntax, and semantics; taken from
2668
 
    # the "duration" ABNF definition in RFC 3339, Appendix A.
2669
 
    token_end = Token(re.compile(r"$"), None, frozenset())
2670
 
    token_second = Token(re.compile(r"(\d+)S"),
2671
 
                         datetime.timedelta(seconds=1),
2672
 
                         frozenset((token_end, )))
2673
 
    token_minute = Token(re.compile(r"(\d+)M"),
2674
 
                         datetime.timedelta(minutes=1),
2675
 
                         frozenset((token_second, token_end)))
2676
 
    token_hour = Token(re.compile(r"(\d+)H"),
2677
 
                       datetime.timedelta(hours=1),
2678
 
                       frozenset((token_minute, token_end)))
2679
 
    token_time = Token(re.compile(r"T"),
2680
 
                       None,
2681
 
                       frozenset((token_hour, token_minute,
2682
 
                                  token_second)))
2683
 
    token_day = Token(re.compile(r"(\d+)D"),
2684
 
                      datetime.timedelta(days=1),
2685
 
                      frozenset((token_time, token_end)))
2686
 
    token_month = Token(re.compile(r"(\d+)M"),
2687
 
                        datetime.timedelta(weeks=4),
2688
 
                        frozenset((token_day, token_end)))
2689
 
    token_year = Token(re.compile(r"(\d+)Y"),
2690
 
                       datetime.timedelta(weeks=52),
2691
 
                       frozenset((token_month, token_end)))
2692
 
    token_week = Token(re.compile(r"(\d+)W"),
2693
 
                       datetime.timedelta(weeks=1),
2694
 
                       frozenset((token_end, )))
2695
 
    token_duration = Token(re.compile(r"P"), None,
2696
 
                           frozenset((token_year, token_month,
2697
 
                                      token_day, token_time,
2698
 
                                      token_week)))
2699
 
    # Define starting values:
2700
 
    # Value so far
2701
 
    value = datetime.timedelta()
2702
 
    found_token = None
2703
 
    # Following valid tokens
2704
 
    followers = frozenset((token_duration, ))
2705
 
    # String left to parse
2706
 
    s = duration
2707
 
    # Loop until end token is found
2708
 
    while found_token is not token_end:
2709
 
        # Search for any currently valid tokens
2710
 
        for token in followers:
2711
 
            match = token.regexp.match(s)
2712
 
            if match is not None:
2713
 
                # Token found
2714
 
                if token.value is not None:
2715
 
                    # Value found, parse digits
2716
 
                    factor = int(match.group(1), 10)
2717
 
                    # Add to value so far
2718
 
                    value += factor * token.value
2719
 
                # Strip token from string
2720
 
                s = token.regexp.sub("", s, 1)
2721
 
                # Go to found token
2722
 
                found_token = token
2723
 
                # Set valid next tokens
2724
 
                followers = found_token.followers
2725
 
                break
2726
 
        else:
2727
 
            # No currently valid tokens were found
2728
 
            raise ValueError("Invalid RFC 3339 duration: {!r}"
2729
 
                             .format(duration))
2730
 
    # End token found
2731
 
    return value
2732
 
 
2733
 
 
2734
1911
def string_to_delta(interval):
2735
1912
    """Parse a string and return a datetime.timedelta
2736
 
 
 
1913
    
2737
1914
    >>> string_to_delta('7d')
2738
1915
    datetime.timedelta(7)
2739
1916
    >>> string_to_delta('60s')
2747
1924
    >>> string_to_delta('5m 30s')
2748
1925
    datetime.timedelta(0, 330)
2749
1926
    """
2750
 
 
2751
 
    try:
2752
 
        return rfc3339_duration_to_delta(interval)
2753
 
    except ValueError:
2754
 
        pass
2755
 
 
2756
1927
    timevalue = datetime.timedelta(0)
2757
1928
    for s in interval.split():
2758
1929
        try:
2759
 
            suffix = s[-1]
 
1930
            suffix = unicode(s[-1])
2760
1931
            value = int(s[:-1])
2761
1932
            if suffix == "d":
2762
1933
                delta = datetime.timedelta(value)
2769
1940
            elif suffix == "w":
2770
1941
                delta = datetime.timedelta(0, 0, 0, 0, 0, 0, value)
2771
1942
            else:
2772
 
                raise ValueError("Unknown suffix {!r}".format(suffix))
2773
 
        except IndexError as e:
 
1943
                raise ValueError("Unknown suffix %r" % suffix)
 
1944
        except (ValueError, IndexError) as e:
2774
1945
            raise ValueError(*(e.args))
2775
1946
        timevalue += delta
2776
1947
    return timevalue
2777
1948
 
2778
1949
 
2779
 
def daemon(nochdir=False, noclose=False):
 
1950
def daemon(nochdir = False, noclose = False):
2780
1951
    """See daemon(3).  Standard BSD Unix function.
2781
 
 
 
1952
    
2782
1953
    This should really exist as os.daemon, but it doesn't (yet)."""
2783
1954
    if os.fork():
2784
1955
        sys.exit()
2789
1960
        sys.exit()
2790
1961
    if not noclose:
2791
1962
        # Close all standard open file descriptors
2792
 
        null = os.open(os.devnull, os.O_NOCTTY | os.O_RDWR)
 
1963
        null = os.open(os.path.devnull, os.O_NOCTTY | os.O_RDWR)
2793
1964
        if not stat.S_ISCHR(os.fstat(null).st_mode):
2794
1965
            raise OSError(errno.ENODEV,
2795
 
                          "{} not a character device"
2796
 
                          .format(os.devnull))
 
1966
                          "%s not a character device"
 
1967
                          % os.path.devnull)
2797
1968
        os.dup2(null, sys.stdin.fileno())
2798
1969
        os.dup2(null, sys.stdout.fileno())
2799
1970
        os.dup2(null, sys.stderr.fileno())
2802
1973
 
2803
1974
 
2804
1975
def main():
2805
 
 
 
1976
    
2806
1977
    ##################################################################
2807
1978
    # Parsing of options, both command line and config file
2808
 
 
 
1979
    
2809
1980
    parser = argparse.ArgumentParser()
2810
1981
    parser.add_argument("-v", "--version", action="version",
2811
 
                        version="%(prog)s {}".format(version),
 
1982
                        version = "%%(prog)s %s" % version,
2812
1983
                        help="show version number and exit")
2813
1984
    parser.add_argument("-i", "--interface", metavar="IF",
2814
1985
                        help="Bind to interface IF")
2820
1991
                        help="Run self-test")
2821
1992
    parser.add_argument("--debug", action="store_true",
2822
1993
                        help="Debug mode; run in foreground and log"
2823
 
                        " to terminal", default=None)
 
1994
                        " to terminal")
2824
1995
    parser.add_argument("--debuglevel", metavar="LEVEL",
2825
1996
                        help="Debug level for stdout output")
2826
1997
    parser.add_argument("--priority", help="GnuTLS"
2833
2004
                        " files")
2834
2005
    parser.add_argument("--no-dbus", action="store_false",
2835
2006
                        dest="use_dbus", help="Do not provide D-Bus"
2836
 
                        " system bus interface", default=None)
 
2007
                        " system bus interface")
2837
2008
    parser.add_argument("--no-ipv6", action="store_false",
2838
 
                        dest="use_ipv6", help="Do not use IPv6",
2839
 
                        default=None)
 
2009
                        dest="use_ipv6", help="Do not use IPv6")
2840
2010
    parser.add_argument("--no-restore", action="store_false",
2841
2011
                        dest="restore", help="Do not restore stored"
2842
 
                        " state", default=None)
2843
 
    parser.add_argument("--socket", type=int,
2844
 
                        help="Specify a file descriptor to a network"
2845
 
                        " socket to use instead of creating one")
 
2012
                        " state")
2846
2013
    parser.add_argument("--statedir", metavar="DIR",
2847
2014
                        help="Directory to save/restore state in")
2848
 
    parser.add_argument("--foreground", action="store_true",
2849
 
                        help="Run in foreground", default=None)
2850
 
    parser.add_argument("--no-zeroconf", action="store_false",
2851
 
                        dest="zeroconf", help="Do not use Zeroconf",
2852
 
                        default=None)
2853
 
 
 
2015
    
2854
2016
    options = parser.parse_args()
2855
 
 
 
2017
    
2856
2018
    if options.check:
2857
2019
        import doctest
2858
 
        fail_count, test_count = doctest.testmod()
2859
 
        sys.exit(os.EX_OK if fail_count == 0 else 1)
2860
 
 
 
2020
        doctest.testmod()
 
2021
        sys.exit()
 
2022
    
2861
2023
    # Default values for config file for server-global settings
2862
 
    server_defaults = {"interface": "",
2863
 
                       "address": "",
2864
 
                       "port": "",
2865
 
                       "debug": "False",
2866
 
                       "priority":
2867
 
                       "SECURE256:!CTYPE-X.509:+CTYPE-OPENPGP:!RSA"
2868
 
                       ":+SIGN-DSA-SHA256",
2869
 
                       "servicename": "Mandos",
2870
 
                       "use_dbus": "True",
2871
 
                       "use_ipv6": "True",
2872
 
                       "debuglevel": "",
2873
 
                       "restore": "True",
2874
 
                       "socket": "",
2875
 
                       "statedir": "/var/lib/mandos",
2876
 
                       "foreground": "False",
2877
 
                       "zeroconf": "True",
2878
 
                       }
2879
 
 
 
2024
    server_defaults = { "interface": "",
 
2025
                        "address": "",
 
2026
                        "port": "",
 
2027
                        "debug": "False",
 
2028
                        "priority":
 
2029
                        "SECURE256:!CTYPE-X.509:+CTYPE-OPENPGP",
 
2030
                        "servicename": "Mandos",
 
2031
                        "use_dbus": "True",
 
2032
                        "use_ipv6": "True",
 
2033
                        "debuglevel": "",
 
2034
                        "restore": "True",
 
2035
                        "statedir": "/var/lib/mandos"
 
2036
                        }
 
2037
    
2880
2038
    # Parse config file for server-global settings
2881
2039
    server_config = configparser.SafeConfigParser(server_defaults)
2882
2040
    del server_defaults
2883
 
    server_config.read(os.path.join(options.configdir, "mandos.conf"))
 
2041
    server_config.read(os.path.join(options.configdir,
 
2042
                                    "mandos.conf"))
2884
2043
    # Convert the SafeConfigParser object to a dict
2885
2044
    server_settings = server_config.defaults()
2886
2045
    # Use the appropriate methods on the non-string config options
2887
 
    for option in ("debug", "use_dbus", "use_ipv6", "restore",
2888
 
                   "foreground", "zeroconf"):
 
2046
    for option in ("debug", "use_dbus", "use_ipv6"):
2889
2047
        server_settings[option] = server_config.getboolean("DEFAULT",
2890
2048
                                                           option)
2891
2049
    if server_settings["port"]:
2892
2050
        server_settings["port"] = server_config.getint("DEFAULT",
2893
2051
                                                       "port")
2894
 
    if server_settings["socket"]:
2895
 
        server_settings["socket"] = server_config.getint("DEFAULT",
2896
 
                                                         "socket")
2897
 
        # Later, stdin will, and stdout and stderr might, be dup'ed
2898
 
        # over with an opened os.devnull.  But we don't want this to
2899
 
        # happen with a supplied network socket.
2900
 
        if 0 <= server_settings["socket"] <= 2:
2901
 
            server_settings["socket"] = os.dup(server_settings
2902
 
                                               ["socket"])
2903
2052
    del server_config
2904
 
 
 
2053
    
2905
2054
    # Override the settings from the config file with command line
2906
2055
    # options, if set.
2907
2056
    for option in ("interface", "address", "port", "debug",
2908
 
                   "priority", "servicename", "configdir", "use_dbus",
2909
 
                   "use_ipv6", "debuglevel", "restore", "statedir",
2910
 
                   "socket", "foreground", "zeroconf"):
 
2057
                   "priority", "servicename", "configdir",
 
2058
                   "use_dbus", "use_ipv6", "debuglevel", "restore",
 
2059
                   "statedir"):
2911
2060
        value = getattr(options, option)
2912
2061
        if value is not None:
2913
2062
            server_settings[option] = value
2914
2063
    del options
2915
2064
    # Force all strings to be unicode
2916
2065
    for option in server_settings.keys():
2917
 
        if isinstance(server_settings[option], bytes):
2918
 
            server_settings[option] = (server_settings[option]
2919
 
                                       .decode("utf-8"))
2920
 
    # Force all boolean options to be boolean
2921
 
    for option in ("debug", "use_dbus", "use_ipv6", "restore",
2922
 
                   "foreground", "zeroconf"):
2923
 
        server_settings[option] = bool(server_settings[option])
2924
 
    # Debug implies foreground
2925
 
    if server_settings["debug"]:
2926
 
        server_settings["foreground"] = True
 
2066
        if type(server_settings[option]) is str:
 
2067
            server_settings[option] = unicode(server_settings[option])
2927
2068
    # Now we have our good server settings in "server_settings"
2928
 
 
 
2069
    
2929
2070
    ##################################################################
2930
 
 
2931
 
    if (not server_settings["zeroconf"]
2932
 
        and not (server_settings["port"]
2933
 
                 or server_settings["socket"] != "")):
2934
 
        parser.error("Needs port or socket to work without Zeroconf")
2935
 
 
 
2071
    
2936
2072
    # For convenience
2937
2073
    debug = server_settings["debug"]
2938
2074
    debuglevel = server_settings["debuglevel"]
2940
2076
    use_ipv6 = server_settings["use_ipv6"]
2941
2077
    stored_state_path = os.path.join(server_settings["statedir"],
2942
2078
                                     stored_state_file)
2943
 
    foreground = server_settings["foreground"]
2944
 
    zeroconf = server_settings["zeroconf"]
2945
 
 
 
2079
    
2946
2080
    if debug:
2947
 
        initlogger(debug, logging.DEBUG)
 
2081
        initlogger(logging.DEBUG)
2948
2082
    else:
2949
2083
        if not debuglevel:
2950
 
            initlogger(debug)
 
2084
            initlogger()
2951
2085
        else:
2952
2086
            level = getattr(logging, debuglevel.upper())
2953
 
            initlogger(debug, level)
2954
 
 
 
2087
            initlogger(level)
 
2088
    
2955
2089
    if server_settings["servicename"] != "Mandos":
2956
 
        syslogger.setFormatter(
2957
 
            logging.Formatter('Mandos ({}) [%(process)d]:'
2958
 
                              ' %(levelname)s: %(message)s'.format(
2959
 
                                  server_settings["servicename"])))
2960
 
 
 
2090
        syslogger.setFormatter(logging.Formatter
 
2091
                               ('Mandos (%s) [%%(process)d]:'
 
2092
                                ' %%(levelname)s: %%(message)s'
 
2093
                                % server_settings["servicename"]))
 
2094
    
2961
2095
    # Parse config file with clients
2962
 
    client_config = configparser.SafeConfigParser(Client
2963
 
                                                  .client_defaults)
 
2096
    client_config = configparser.SafeConfigParser(Client.client_defaults)
2964
2097
    client_config.read(os.path.join(server_settings["configdir"],
2965
2098
                                    "clients.conf"))
2966
 
 
 
2099
    
2967
2100
    global mandos_dbus_service
2968
2101
    mandos_dbus_service = None
2969
 
 
2970
 
    socketfd = None
2971
 
    if server_settings["socket"] != "":
2972
 
        socketfd = server_settings["socket"]
2973
 
    tcp_server = MandosServer(
2974
 
        (server_settings["address"], server_settings["port"]),
2975
 
        ClientHandler,
2976
 
        interface=(server_settings["interface"] or None),
2977
 
        use_ipv6=use_ipv6,
2978
 
        gnutls_priority=server_settings["priority"],
2979
 
        use_dbus=use_dbus,
2980
 
        socketfd=socketfd)
2981
 
    if not foreground:
2982
 
        pidfilename = "/run/mandos.pid"
2983
 
        if not os.path.isdir("/run/."):
2984
 
            pidfilename = "/var/run/mandos.pid"
2985
 
        pidfile = None
2986
 
        try:
2987
 
            pidfile = codecs.open(pidfilename, "w", encoding="utf-8")
2988
 
        except IOError as e:
2989
 
            logger.error("Could not open file %r", pidfilename,
2990
 
                         exc_info=e)
2991
 
 
2992
 
    for name, group in (("_mandos", "_mandos"),
2993
 
                        ("mandos", "mandos"),
2994
 
                        ("nobody", "nogroup")):
2995
 
        try:
2996
 
            uid = pwd.getpwnam(name).pw_uid
2997
 
            gid = pwd.getpwnam(group).pw_gid
2998
 
            break
 
2102
    
 
2103
    tcp_server = MandosServer((server_settings["address"],
 
2104
                               server_settings["port"]),
 
2105
                              ClientHandler,
 
2106
                              interface=(server_settings["interface"]
 
2107
                                         or None),
 
2108
                              use_ipv6=use_ipv6,
 
2109
                              gnutls_priority=
 
2110
                              server_settings["priority"],
 
2111
                              use_dbus=use_dbus)
 
2112
    if not debug:
 
2113
        pidfilename = "/var/run/mandos.pid"
 
2114
        try:
 
2115
            pidfile = open(pidfilename, "w")
 
2116
        except IOError:
 
2117
            logger.error("Could not open file %r", pidfilename)
 
2118
    
 
2119
    try:
 
2120
        uid = pwd.getpwnam("_mandos").pw_uid
 
2121
        gid = pwd.getpwnam("_mandos").pw_gid
 
2122
    except KeyError:
 
2123
        try:
 
2124
            uid = pwd.getpwnam("mandos").pw_uid
 
2125
            gid = pwd.getpwnam("mandos").pw_gid
2999
2126
        except KeyError:
3000
 
            continue
3001
 
    else:
3002
 
        uid = 65534
3003
 
        gid = 65534
 
2127
            try:
 
2128
                uid = pwd.getpwnam("nobody").pw_uid
 
2129
                gid = pwd.getpwnam("nobody").pw_gid
 
2130
            except KeyError:
 
2131
                uid = 65534
 
2132
                gid = 65534
3004
2133
    try:
3005
2134
        os.setgid(gid)
3006
2135
        os.setuid(uid)
3007
 
        if debug:
3008
 
            logger.debug("Did setuid/setgid to {}:{}".format(uid,
3009
 
                                                             gid))
3010
2136
    except OSError as error:
3011
 
        logger.warning("Failed to setuid/setgid to {}:{}: {}"
3012
 
                       .format(uid, gid, os.strerror(error.errno)))
3013
 
        if error.errno != errno.EPERM:
3014
 
            raise
3015
 
 
 
2137
        if error[0] != errno.EPERM:
 
2138
            raise error
 
2139
    
3016
2140
    if debug:
3017
2141
        # Enable all possible GnuTLS debugging
3018
 
 
 
2142
        
3019
2143
        # "Use a log level over 10 to enable all debugging options."
3020
2144
        # - GnuTLS manual
3021
 
        gnutls.global_set_log_level(11)
3022
 
 
3023
 
        @gnutls.log_func
 
2145
        gnutls.library.functions.gnutls_global_set_log_level(11)
 
2146
        
 
2147
        @gnutls.library.types.gnutls_log_func
3024
2148
        def debug_gnutls(level, string):
3025
2149
            logger.debug("GnuTLS: %s", string[:-1])
3026
 
 
3027
 
        gnutls.global_set_log_function(debug_gnutls)
3028
 
 
 
2150
        
 
2151
        (gnutls.library.functions
 
2152
         .gnutls_global_set_log_function(debug_gnutls))
 
2153
        
3029
2154
        # Redirect stdin so all checkers get /dev/null
3030
 
        null = os.open(os.devnull, os.O_NOCTTY | os.O_RDWR)
 
2155
        null = os.open(os.path.devnull, os.O_NOCTTY | os.O_RDWR)
3031
2156
        os.dup2(null, sys.stdin.fileno())
3032
2157
        if null > 2:
3033
2158
            os.close(null)
3034
 
 
 
2159
    else:
 
2160
        # No console logging
 
2161
        logger.removeHandler(console)
 
2162
    
3035
2163
    # Need to fork before connecting to D-Bus
3036
 
    if not foreground:
 
2164
    if not debug:
3037
2165
        # Close all input and output, do double fork, etc.
3038
2166
        daemon()
3039
 
 
3040
 
    # multiprocessing will use threads, so before we use GLib we need
3041
 
    # to inform GLib that threads will be used.
3042
 
    GLib.threads_init()
3043
 
 
 
2167
    
3044
2168
    global main_loop
3045
2169
    # From the Avahi example code
3046
 
    DBusGMainLoop(set_as_default=True)
3047
 
    main_loop = GLib.MainLoop()
 
2170
    DBusGMainLoop(set_as_default=True )
 
2171
    main_loop = gobject.MainLoop()
3048
2172
    bus = dbus.SystemBus()
3049
2173
    # End of Avahi example code
3050
2174
    if use_dbus:
3051
2175
        try:
3052
2176
            bus_name = dbus.service.BusName("se.recompile.Mandos",
3053
 
                                            bus,
3054
 
                                            do_not_queue=True)
3055
 
            old_bus_name = dbus.service.BusName(
3056
 
                "se.bsnet.fukt.Mandos", bus,
3057
 
                do_not_queue=True)
3058
 
        except dbus.exceptions.DBusException as e:
3059
 
            logger.error("Disabling D-Bus:", exc_info=e)
 
2177
                                            bus, do_not_queue=True)
 
2178
            old_bus_name = (dbus.service.BusName
 
2179
                            ("se.bsnet.fukt.Mandos", bus,
 
2180
                             do_not_queue=True))
 
2181
        except dbus.exceptions.NameExistsException as e:
 
2182
            logger.error(unicode(e) + ", disabling D-Bus")
3060
2183
            use_dbus = False
3061
2184
            server_settings["use_dbus"] = False
3062
2185
            tcp_server.use_dbus = False
3063
 
    if zeroconf:
3064
 
        protocol = avahi.PROTO_INET6 if use_ipv6 else avahi.PROTO_INET
3065
 
        service = AvahiServiceToSyslog(
3066
 
            name=server_settings["servicename"],
3067
 
            servicetype="_mandos._tcp",
3068
 
            protocol=protocol,
3069
 
            bus=bus)
3070
 
        if server_settings["interface"]:
3071
 
            service.interface = if_nametoindex(
3072
 
                server_settings["interface"].encode("utf-8"))
3073
 
 
 
2186
    protocol = avahi.PROTO_INET6 if use_ipv6 else avahi.PROTO_INET
 
2187
    service = AvahiServiceToSyslog(name =
 
2188
                                   server_settings["servicename"],
 
2189
                                   servicetype = "_mandos._tcp",
 
2190
                                   protocol = protocol, bus = bus)
 
2191
    if server_settings["interface"]:
 
2192
        service.interface = (if_nametoindex
 
2193
                             (str(server_settings["interface"])))
 
2194
    
3074
2195
    global multiprocessing_manager
3075
2196
    multiprocessing_manager = multiprocessing.Manager()
3076
 
 
 
2197
    
3077
2198
    client_class = Client
3078
2199
    if use_dbus:
3079
 
        client_class = functools.partial(ClientDBus, bus=bus)
3080
 
 
 
2200
        client_class = functools.partial(ClientDBusTransitional,
 
2201
                                         bus = bus)
 
2202
    
3081
2203
    client_settings = Client.config_parser(client_config)
3082
2204
    old_client_settings = {}
3083
2205
    clients_data = {}
3084
 
 
3085
 
    # This is used to redirect stdout and stderr for checker processes
3086
 
    global wnull
3087
 
    wnull = open(os.devnull, "w")  # A writable /dev/null
3088
 
    # Only used if server is running in foreground but not in debug
3089
 
    # mode
3090
 
    if debug or not foreground:
3091
 
        wnull.close()
3092
 
 
 
2206
    
3093
2207
    # Get client data and settings from last running state.
3094
2208
    if server_settings["restore"]:
3095
2209
        try:
3096
2210
            with open(stored_state_path, "rb") as stored_state:
3097
 
                if sys.version_info.major == 2:
3098
 
                    clients_data, old_client_settings = pickle.load(
3099
 
                        stored_state)
3100
 
                else:
3101
 
                    bytes_clients_data, bytes_old_client_settings = (
3102
 
                        pickle.load(stored_state, encoding="bytes"))
3103
 
                    #   Fix bytes to strings
3104
 
                    #  clients_data
3105
 
                    # .keys()
3106
 
                    clients_data = {(key.decode("utf-8")
3107
 
                                     if isinstance(key, bytes)
3108
 
                                     else key): value
3109
 
                                    for key, value in
3110
 
                                    bytes_clients_data.items()}
3111
 
                    del bytes_clients_data
3112
 
                    for key in clients_data:
3113
 
                        value = {(k.decode("utf-8")
3114
 
                                  if isinstance(k, bytes) else k): v
3115
 
                                 for k, v in
3116
 
                                 clients_data[key].items()}
3117
 
                        clients_data[key] = value
3118
 
                        # .client_structure
3119
 
                        value["client_structure"] = [
3120
 
                            (s.decode("utf-8")
3121
 
                             if isinstance(s, bytes)
3122
 
                             else s) for s in
3123
 
                            value["client_structure"]]
3124
 
                        # .name & .host
3125
 
                        for k in ("name", "host"):
3126
 
                            if isinstance(value[k], bytes):
3127
 
                                value[k] = value[k].decode("utf-8")
3128
 
                    #  old_client_settings
3129
 
                    # .keys()
3130
 
                    old_client_settings = {
3131
 
                        (key.decode("utf-8")
3132
 
                         if isinstance(key, bytes)
3133
 
                         else key): value
3134
 
                        for key, value in
3135
 
                        bytes_old_client_settings.items()}
3136
 
                    del bytes_old_client_settings
3137
 
                    # .host
3138
 
                    for value in old_client_settings.values():
3139
 
                        if isinstance(value["host"], bytes):
3140
 
                            value["host"] = (value["host"]
3141
 
                                             .decode("utf-8"))
 
2211
                clients_data, old_client_settings = (pickle.load
 
2212
                                                     (stored_state))
3142
2213
            os.remove(stored_state_path)
3143
2214
        except IOError as e:
3144
 
            if e.errno == errno.ENOENT:
3145
 
                logger.warning("Could not load persistent state:"
3146
 
                               " {}".format(os.strerror(e.errno)))
3147
 
            else:
3148
 
                logger.critical("Could not load persistent state:",
3149
 
                                exc_info=e)
 
2215
            logger.warning("Could not load persistent state: {0}"
 
2216
                           .format(e))
 
2217
            if e.errno != errno.ENOENT:
3150
2218
                raise
3151
 
        except EOFError as e:
3152
 
            logger.warning("Could not load persistent state: "
3153
 
                           "EOFError:",
3154
 
                           exc_info=e)
3155
 
 
 
2219
    
3156
2220
    with PGPEngine() as pgp:
3157
 
        for client_name, client in clients_data.items():
3158
 
            # Skip removed clients
3159
 
            if client_name not in client_settings:
3160
 
                continue
3161
 
 
 
2221
        for client_name, client in clients_data.iteritems():
3162
2222
            # Decide which value to use after restoring saved state.
3163
2223
            # We have three different values: Old config file,
3164
2224
            # new config file, and saved state.
3169
2229
                    # For each value in new config, check if it
3170
2230
                    # differs from the old config value (Except for
3171
2231
                    # the "secret" attribute)
3172
 
                    if (name != "secret"
3173
 
                        and (value !=
3174
 
                             old_client_settings[client_name][name])):
 
2232
                    if (name != "secret" and
 
2233
                        value != old_client_settings[client_name]
 
2234
                        [name]):
3175
2235
                        client[name] = value
3176
2236
                except KeyError:
3177
2237
                    pass
3178
 
 
 
2238
            
3179
2239
            # Clients who has passed its expire date can still be
3180
 
            # enabled if its last checker was successful.  A Client
3181
 
            # whose checker succeeded before we stored its state is
3182
 
            # assumed to have successfully run all checkers during
3183
 
            # downtime.
 
2240
            # enabled if its last checker was successful.  Clients
 
2241
            # whose checker failed before we stored its state is
 
2242
            # assumed to have failed all checkers during downtime.
3184
2243
            if client["enabled"]:
3185
2244
                if datetime.datetime.utcnow() >= client["expires"]:
3186
2245
                    if not client["last_checked_ok"]:
3187
2246
                        logger.warning(
3188
 
                            "disabling client {} - Client never "
3189
 
                            "performed a successful checker".format(
3190
 
                                client_name))
 
2247
                            "disabling client {0} - Client never "
 
2248
                            "performed a successfull checker"
 
2249
                            .format(client["name"]))
3191
2250
                        client["enabled"] = False
3192
2251
                    elif client["last_checker_status"] != 0:
3193
2252
                        logger.warning(
3194
 
                            "disabling client {} - Client last"
3195
 
                            " checker failed with error code"
3196
 
                            " {}".format(
3197
 
                                client_name,
3198
 
                                client["last_checker_status"]))
 
2253
                            "disabling client {0} - Client "
 
2254
                            "last checker failed with error code {1}"
 
2255
                            .format(client["name"],
 
2256
                                    client["last_checker_status"]))
3199
2257
                        client["enabled"] = False
3200
2258
                    else:
3201
 
                        client["expires"] = (
3202
 
                            datetime.datetime.utcnow()
3203
 
                            + client["timeout"])
3204
 
                        logger.debug("Last checker succeeded,"
3205
 
                                     " keeping {} enabled".format(
3206
 
                                         client_name))
 
2259
                        client["expires"] = (datetime.datetime
 
2260
                                             .utcnow()
 
2261
                                             + client["timeout"])
 
2262
                    
3207
2263
            try:
3208
 
                client["secret"] = pgp.decrypt(
3209
 
                    client["encrypted_secret"],
3210
 
                    client_settings[client_name]["secret"])
 
2264
                client["secret"] = (
 
2265
                    pgp.decrypt(client["encrypted_secret"],
 
2266
                                client_settings[client_name]
 
2267
                                ["secret"]))
3211
2268
            except PGPError:
3212
2269
                # If decryption fails, we use secret from new settings
3213
 
                logger.debug("Failed to decrypt {} old secret".format(
3214
 
                    client_name))
3215
 
                client["secret"] = (client_settings[client_name]
3216
 
                                    ["secret"])
 
2270
                logger.debug("Failed to decrypt {0} old secret"
 
2271
                             .format(client_name))
 
2272
                client["secret"] = (
 
2273
                    client_settings[client_name]["secret"])
3217
2274
 
 
2275
    
3218
2276
    # Add/remove clients based on new changes made to config
3219
 
    for client_name in (set(old_client_settings)
3220
 
                        - set(client_settings)):
 
2277
    for client_name in set(old_client_settings) - set(client_settings):
3221
2278
        del clients_data[client_name]
3222
 
    for client_name in (set(client_settings)
3223
 
                        - set(old_client_settings)):
 
2279
    for client_name in set(client_settings) - set(old_client_settings):
3224
2280
        clients_data[client_name] = client_settings[client_name]
3225
2281
 
3226
 
    # Create all client objects
3227
 
    for client_name, client in clients_data.items():
 
2282
    # Create clients all clients
 
2283
    for client_name, client in clients_data.iteritems():
3228
2284
        tcp_server.clients[client_name] = client_class(
3229
 
            name=client_name,
3230
 
            settings=client,
3231
 
            server_settings=server_settings)
3232
 
 
 
2285
            name = client_name, settings = client)
 
2286
    
3233
2287
    if not tcp_server.clients:
3234
2288
        logger.warning("No clients defined")
3235
 
 
3236
 
    if not foreground:
3237
 
        if pidfile is not None:
3238
 
            pid = os.getpid()
3239
 
            try:
3240
 
                with pidfile:
3241
 
                    print(pid, file=pidfile)
3242
 
            except IOError:
3243
 
                logger.error("Could not write to file %r with PID %d",
3244
 
                             pidfilename, pid)
3245
 
        del pidfile
 
2289
        
 
2290
    if not debug:
 
2291
        try:
 
2292
            with pidfile:
 
2293
                pid = os.getpid()
 
2294
                pidfile.write(str(pid) + "\n".encode("utf-8"))
 
2295
            del pidfile
 
2296
        except IOError:
 
2297
            logger.error("Could not write to file %r with PID %d",
 
2298
                         pidfilename, pid)
 
2299
        except NameError:
 
2300
            # "pidfile" was never created
 
2301
            pass
3246
2302
        del pidfilename
3247
 
 
3248
 
    for termsig in (signal.SIGHUP, signal.SIGTERM):
3249
 
        GLib.unix_signal_add(GLib.PRIORITY_HIGH, termsig,
3250
 
                             lambda: main_loop.quit() and False)
3251
 
 
 
2303
        signal.signal(signal.SIGINT, signal.SIG_IGN)
 
2304
    
 
2305
    signal.signal(signal.SIGHUP, lambda signum, frame: sys.exit())
 
2306
    signal.signal(signal.SIGTERM, lambda signum, frame: sys.exit())
 
2307
    
3252
2308
    if use_dbus:
3253
 
 
3254
 
        @alternate_dbus_interfaces(
3255
 
            {"se.recompile.Mandos": "se.bsnet.fukt.Mandos"})
3256
 
        class MandosDBusService(DBusObjectWithObjectManager):
 
2309
        class MandosDBusService(dbus.service.Object):
3257
2310
            """A D-Bus proxy object"""
3258
 
 
3259
2311
            def __init__(self):
3260
2312
                dbus.service.Object.__init__(self, bus, "/")
3261
 
 
3262
2313
            _interface = "se.recompile.Mandos"
3263
 
 
 
2314
            
3264
2315
            @dbus.service.signal(_interface, signature="o")
3265
2316
            def ClientAdded(self, objpath):
3266
2317
                "D-Bus signal"
3267
2318
                pass
3268
 
 
 
2319
            
3269
2320
            @dbus.service.signal(_interface, signature="ss")
3270
2321
            def ClientNotFound(self, fingerprint, address):
3271
2322
                "D-Bus signal"
3272
2323
                pass
3273
 
 
3274
 
            @dbus_annotations({"org.freedesktop.DBus.Deprecated":
3275
 
                               "true"})
 
2324
            
3276
2325
            @dbus.service.signal(_interface, signature="os")
3277
2326
            def ClientRemoved(self, objpath, name):
3278
2327
                "D-Bus signal"
3279
2328
                pass
3280
 
 
3281
 
            @dbus_annotations({"org.freedesktop.DBus.Deprecated":
3282
 
                               "true"})
 
2329
            
3283
2330
            @dbus.service.method(_interface, out_signature="ao")
3284
2331
            def GetAllClients(self):
3285
2332
                "D-Bus method"
3286
 
                return dbus.Array(c.dbus_object_path for c in
3287
 
                                  tcp_server.clients.values())
3288
 
 
3289
 
            @dbus_annotations({"org.freedesktop.DBus.Deprecated":
3290
 
                               "true"})
 
2333
                return dbus.Array(c.dbus_object_path
 
2334
                                  for c in
 
2335
                                  tcp_server.clients.itervalues())
 
2336
            
3291
2337
            @dbus.service.method(_interface,
3292
2338
                                 out_signature="a{oa{sv}}")
3293
2339
            def GetAllClientsWithProperties(self):
3294
2340
                "D-Bus method"
3295
2341
                return dbus.Dictionary(
3296
 
                    {c.dbus_object_path: c.GetAll(
3297
 
                        "se.recompile.Mandos.Client")
3298
 
                     for c in tcp_server.clients.values()},
 
2342
                    ((c.dbus_object_path, c.GetAll(""))
 
2343
                     for c in tcp_server.clients.itervalues()),
3299
2344
                    signature="oa{sv}")
3300
 
 
 
2345
            
3301
2346
            @dbus.service.method(_interface, in_signature="o")
3302
2347
            def RemoveClient(self, object_path):
3303
2348
                "D-Bus method"
3304
 
                for c in tcp_server.clients.values():
 
2349
                for c in tcp_server.clients.itervalues():
3305
2350
                    if c.dbus_object_path == object_path:
3306
2351
                        del tcp_server.clients[c.name]
3307
2352
                        c.remove_from_connection()
3308
 
                        # Don't signal the disabling
 
2353
                        # Don't signal anything except ClientRemoved
3309
2354
                        c.disable(quiet=True)
3310
 
                        # Emit D-Bus signal for removal
3311
 
                        self.client_removed_signal(c)
 
2355
                        # Emit D-Bus signal
 
2356
                        self.ClientRemoved(object_path, c.name)
3312
2357
                        return
3313
2358
                raise KeyError(object_path)
3314
 
 
 
2359
            
3315
2360
            del _interface
3316
 
 
3317
 
            @dbus.service.method(dbus.OBJECT_MANAGER_IFACE,
3318
 
                                 out_signature="a{oa{sa{sv}}}")
3319
 
            def GetManagedObjects(self):
3320
 
                """D-Bus method"""
3321
 
                return dbus.Dictionary(
3322
 
                    {client.dbus_object_path:
3323
 
                     dbus.Dictionary(
3324
 
                         {interface: client.GetAll(interface)
3325
 
                          for interface in
3326
 
                          client._get_all_interface_names()})
3327
 
                     for client in tcp_server.clients.values()})
3328
 
 
3329
 
            def client_added_signal(self, client):
3330
 
                """Send the new standard signal and the old signal"""
3331
 
                if use_dbus:
3332
 
                    # New standard signal
3333
 
                    self.InterfacesAdded(
3334
 
                        client.dbus_object_path,
3335
 
                        dbus.Dictionary(
3336
 
                            {interface: client.GetAll(interface)
3337
 
                             for interface in
3338
 
                             client._get_all_interface_names()}))
3339
 
                    # Old signal
3340
 
                    self.ClientAdded(client.dbus_object_path)
3341
 
 
3342
 
            def client_removed_signal(self, client):
3343
 
                """Send the new standard signal and the old signal"""
3344
 
                if use_dbus:
3345
 
                    # New standard signal
3346
 
                    self.InterfacesRemoved(
3347
 
                        client.dbus_object_path,
3348
 
                        client._get_all_interface_names())
3349
 
                    # Old signal
3350
 
                    self.ClientRemoved(client.dbus_object_path,
3351
 
                                       client.name)
3352
 
 
3353
 
        mandos_dbus_service = MandosDBusService()
3354
 
 
3355
 
    # Save modules to variables to exempt the modules from being
3356
 
    # unloaded before the function registered with atexit() is run.
3357
 
    mp = multiprocessing
3358
 
    wn = wnull
3359
 
 
 
2361
        
 
2362
        class MandosDBusServiceTransitional(MandosDBusService):
 
2363
            __metaclass__ = AlternateDBusNamesMetaclass
 
2364
        mandos_dbus_service = MandosDBusServiceTransitional()
 
2365
    
3360
2366
    def cleanup():
3361
2367
        "Cleanup function; run on exit"
3362
 
        if zeroconf:
3363
 
            service.cleanup()
3364
 
 
3365
 
        mp.active_children()
3366
 
        wn.close()
 
2368
        service.cleanup()
 
2369
        
 
2370
        multiprocessing.active_children()
3367
2371
        if not (tcp_server.clients or client_settings):
3368
2372
            return
3369
 
 
 
2373
        
3370
2374
        # Store client before exiting. Secrets are encrypted with key
3371
2375
        # based on what config file has. If config file is
3372
2376
        # removed/edited, old secret will thus be unrecovable.
3373
2377
        clients = {}
3374
2378
        with PGPEngine() as pgp:
3375
 
            for client in tcp_server.clients.values():
 
2379
            for client in tcp_server.clients.itervalues():
3376
2380
                key = client_settings[client.name]["secret"]
3377
2381
                client.encrypted_secret = pgp.encrypt(client.secret,
3378
2382
                                                      key)
3379
2383
                client_dict = {}
3380
 
 
 
2384
                
3381
2385
                # A list of attributes that can not be pickled
3382
2386
                # + secret.
3383
 
                exclude = {"bus", "changedstate", "secret",
3384
 
                           "checker", "server_settings"}
3385
 
                for name, typ in inspect.getmembers(dbus.service
3386
 
                                                    .Object):
 
2387
                exclude = set(("bus", "changedstate", "secret",
 
2388
                               "checker"))
 
2389
                for name, typ in (inspect.getmembers
 
2390
                                  (dbus.service.Object)):
3387
2391
                    exclude.add(name)
3388
 
 
 
2392
                
3389
2393
                client_dict["encrypted_secret"] = (client
3390
2394
                                                   .encrypted_secret)
3391
2395
                for attr in client.client_structure:
3392
2396
                    if attr not in exclude:
3393
2397
                        client_dict[attr] = getattr(client, attr)
3394
 
 
 
2398
                
3395
2399
                clients[client.name] = client_dict
3396
2400
                del client_settings[client.name]["secret"]
3397
 
 
 
2401
        
3398
2402
        try:
3399
 
            with tempfile.NamedTemporaryFile(
3400
 
                    mode='wb',
3401
 
                    suffix=".pickle",
3402
 
                    prefix='clients-',
3403
 
                    dir=os.path.dirname(stored_state_path),
3404
 
                    delete=False) as stored_state:
3405
 
                pickle.dump((clients, client_settings), stored_state,
3406
 
                            protocol=2)
3407
 
                tempname = stored_state.name
3408
 
            os.rename(tempname, stored_state_path)
 
2403
            with os.fdopen(os.open(stored_state_path,
 
2404
                                   os.O_CREAT|os.O_WRONLY|os.O_TRUNC,
 
2405
                                   0600), "wb") as stored_state:
 
2406
                pickle.dump((clients, client_settings), stored_state)
3409
2407
        except (IOError, OSError) as e:
3410
 
            if not debug:
3411
 
                try:
3412
 
                    os.remove(tempname)
3413
 
                except NameError:
3414
 
                    pass
3415
 
            if e.errno in (errno.ENOENT, errno.EACCES, errno.EEXIST):
3416
 
                logger.warning("Could not save persistent state: {}"
3417
 
                               .format(os.strerror(e.errno)))
3418
 
            else:
3419
 
                logger.warning("Could not save persistent state:",
3420
 
                               exc_info=e)
 
2408
            logger.warning("Could not save persistent state: {0}"
 
2409
                           .format(e))
 
2410
            if e.errno not in (errno.ENOENT, errno.EACCES):
3421
2411
                raise
3422
 
 
 
2412
        
3423
2413
        # Delete all clients, and settings from config
3424
2414
        while tcp_server.clients:
3425
2415
            name, client = tcp_server.clients.popitem()
3426
2416
            if use_dbus:
3427
2417
                client.remove_from_connection()
3428
 
            # Don't signal the disabling
 
2418
            # Don't signal anything except ClientRemoved
3429
2419
            client.disable(quiet=True)
3430
 
            # Emit D-Bus signal for removal
3431
2420
            if use_dbus:
3432
 
                mandos_dbus_service.client_removed_signal(client)
 
2421
                # Emit D-Bus signal
 
2422
                mandos_dbus_service.ClientRemoved(client
 
2423
                                                  .dbus_object_path,
 
2424
                                                  client.name)
3433
2425
        client_settings.clear()
3434
 
 
 
2426
    
3435
2427
    atexit.register(cleanup)
3436
 
 
3437
 
    for client in tcp_server.clients.values():
 
2428
    
 
2429
    for client in tcp_server.clients.itervalues():
3438
2430
        if use_dbus:
3439
 
            # Emit D-Bus signal for adding
3440
 
            mandos_dbus_service.client_added_signal(client)
 
2431
            # Emit D-Bus signal
 
2432
            mandos_dbus_service.ClientAdded(client.dbus_object_path)
3441
2433
        # Need to initiate checking of clients
3442
2434
        if client.enabled:
3443
2435
            client.init_checker()
3444
 
 
 
2436
    
3445
2437
    tcp_server.enable()
3446
2438
    tcp_server.server_activate()
3447
 
 
 
2439
    
3448
2440
    # Find out what port we got
3449
 
    if zeroconf:
3450
 
        service.port = tcp_server.socket.getsockname()[1]
 
2441
    service.port = tcp_server.socket.getsockname()[1]
3451
2442
    if use_ipv6:
3452
2443
        logger.info("Now listening on address %r, port %d,"
3453
 
                    " flowinfo %d, scope_id %d",
3454
 
                    *tcp_server.socket.getsockname())
 
2444
                    " flowinfo %d, scope_id %d"
 
2445
                    % tcp_server.socket.getsockname())
3455
2446
    else:                       # IPv4
3456
 
        logger.info("Now listening on address %r, port %d",
3457
 
                    *tcp_server.socket.getsockname())
3458
 
 
3459
 
    # service.interface = tcp_server.socket.getsockname()[3]
3460
 
 
 
2447
        logger.info("Now listening on address %r, port %d"
 
2448
                    % tcp_server.socket.getsockname())
 
2449
    
 
2450
    #service.interface = tcp_server.socket.getsockname()[3]
 
2451
    
3461
2452
    try:
3462
 
        if zeroconf:
3463
 
            # From the Avahi example code
3464
 
            try:
3465
 
                service.activate()
3466
 
            except dbus.exceptions.DBusException as error:
3467
 
                logger.critical("D-Bus Exception", exc_info=error)
3468
 
                cleanup()
3469
 
                sys.exit(1)
3470
 
            # End of Avahi example code
3471
 
 
3472
 
        GLib.io_add_watch(tcp_server.fileno(), GLib.IO_IN,
3473
 
                          lambda *args, **kwargs:
3474
 
                          (tcp_server.handle_request
3475
 
                           (*args[2:], **kwargs) or True))
3476
 
 
 
2453
        # From the Avahi example code
 
2454
        try:
 
2455
            service.activate()
 
2456
        except dbus.exceptions.DBusException as error:
 
2457
            logger.critical("DBusException: %s", error)
 
2458
            cleanup()
 
2459
            sys.exit(1)
 
2460
        # End of Avahi example code
 
2461
        
 
2462
        gobject.io_add_watch(tcp_server.fileno(), gobject.IO_IN,
 
2463
                             lambda *args, **kwargs:
 
2464
                             (tcp_server.handle_request
 
2465
                              (*args[2:], **kwargs) or True))
 
2466
        
3477
2467
        logger.debug("Starting main loop")
3478
2468
        main_loop.run()
3479
2469
    except AvahiError as error:
3480
 
        logger.critical("Avahi Error", exc_info=error)
 
2470
        logger.critical("AvahiError: %s", error)
3481
2471
        cleanup()
3482
2472
        sys.exit(1)
3483
2473
    except KeyboardInterrupt:
3488
2478
    # Must run before the D-Bus bus name gets deregistered
3489
2479
    cleanup()
3490
2480
 
3491
 
 
3492
2481
if __name__ == '__main__':
3493
2482
    main()