/mandos/trunk

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  • Committer: Teddy Hogeborn
  • Date: 2019-07-27 10:11:45 UTC
  • Revision ID: teddy@recompile.se-20190727101145-jnpbpf8220gldbcd
Add dracut(8) support

Add support for the dracut(8) system for generating initramfs image
files; dracut is an alternative to the "initramfs-tools" package.

* .bzrignore (dracut-module/password-agent): Ignore new binary file.
* dracut-module: New directory for the dracut module.
* INSTALL (Prerequisites/Libraries/Mandos Client): Add dracut as an
                                                   alternative to
                                                   initramfs-tools,
                                                   and also add GLib.
* Makefile (DRACUTMODULE, GLIB_CFLAGS, GLIB_LIBS): New.
  (CPROGS): Add "dracut-module/password-agent".
  (DOCS): Add "dracut-module/password-agent.8mandos".
  (dracut-module/password-agent.8mandos): New.
  (dracut-module/password-agent.8mandos.xhtml): - '' -
  (dracut-module/password-agent): - '' -
  (check): Add command to run tests of password-agent(8mandos).
  (install-client-nokey): Also install the dracut module directory,
                          its files, and the password-agent(8mandos)
                          manual page.
  (install-client): To update the initramfs image file, run
                    update-initramfs or dracut depending on what is
                    installed.
  (uninstall-client): - '' - and also uninstall the the files in the
                      dracut module directory, that directory itself,
                      and the password-agent(8mandos) manual page.
* debian/control (Build-Depends): Add "libglib2.0-dev (>=2.40)".
  (Package: mandos-client/Depends): Add "dracut (>= 044+241-3)" as an
                                    alternative dependency to
                                    initramfs-tools.
  (Package: mandos-client/Conflicts): New; set to
                                      "dracut-config-generic".
  (debian/mandos-client.README.Debian): Document alternative commands
                                        to update the initramfs image
                                        for when dracut is used.
* debian/mandos-client.postinst (update_initramfs): Use alternative
                                                    commands to update
                                                    the initramfs
                                                    image for when
                                                    dracut is used.
* debian/tests/control (password-agent, password-agent-suid): Add two
                                                              new tests.
* dracut-module/ask-password-mandos.path: New.
* dracut-module/ask-password-mandos.service: - '' -
* dracut-module/cmdline-mandos.sh: - '' -
* dracut-module/module-setup.sh: - '' -
* dracut-module/password-agent.c: - '' -
* dracut-module/password-agent.xml: - '' -
* initramfs-unpack: Use the dracut "skipcpio" command, if available.
                    Also be more flexible and try hard to detect where
                    compressed data starts.
* plugins.d/mandos-client.xml (SECURITY): Be more precise that the
                                          mandos-client binary might
                                          not always be setuid, but
                                          that the program assumes
                                          that it has been started
                                          that way.
* plugins.d/password-prompt.c: Add new "--prompt" option.
  (conflict_detection): First try to detect the new PID file of
                        plymouth.
  (main): Define and use new "prompt" variable.
* plugins.d/password-prompt.xml (SYNOPSIS): Show new --prompt option.
  (DESCRIPTION): Describe new behavior of looking for plymouth PID
                 file.
  (OPTIONS): Document new "--prompt" option.
  (ENVIRONMENT): Clarify that the CRYPTTAB_SOURCE and CRYPTTAB_NAME
                 environment variables are not used if the --prompt
                 option is used.  Remove unnecessarily specific
                 details about where the CRYPTTAB_SOURCE and
                 CRYPTTAB_NAME comes from, since this can now be
                 either initramfs-tools or dracut.
  (SEE ALSO): Remove superfluous crypttab(5) reference, and add commas
              to separate the other references.
* plugins.d/plymouth.c: Add new "--prompt" and "--debug" options.
  (debug): New global flag.
  (fprintf_plus): New function, used for debug output.
  (exec_and_wait): Add extra "const" to "argv" argument.
  (main): Define and use new "prompt" variable.  Add debug output.
  (main/options, main/parse_opt): New; used to parse options.
* plugins.d/plymouth.xml (SYNOPSIS): Show new options.
  (OPTIONS): Document new options.
  (ENVIRONMENT): Clarify that the cryptsource and crypttarget
                 environment variables are not used if the --prompt
                 option is used.  Remove unnecessarily specific
                 details about where the cryptsource and crypttarget
                 comes from, since this can now be either
                 initramfs-tools or dracut.
  (EXAMPLE): Add an example using an option.
  (SEE ALSO): Remove superfluous crypttab(5) reference.
* plugins.d/splashy.xml (ENVIRONMENT): Clarify that the cryptsource
                                       and crypttarget environment
                                       variables are not used if the
                                       --prompt option is used.
                                       Remove unnecessarily specific
                                       details about where the
                                       cryptsource and crypttarget
                                       comes from, since this can now
                                       be either initramfs-tools or
                                       dracut.
  (SEE ALSO): Remove superfluous crypttab(5) reference.
* plugins.d/usplash.xml (ENVIRONMENT): Clarify that the cryptsource
                                       and crypttarget environment
                                       variables are not used if the
                                       --prompt option is used.
                                       Remove unnecessarily specific
                                       details about where the
                                       cryptsource and crypttarget
                                       comes from, since this can now
                                       be either initramfs-tools or
                                       dracut.
  (SEE ALSO): Remove superfluous crypttab(5) reference.

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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 © 2008-2011 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
 
14
# Copyright © 2008-2019 Teddy Hogeborn
 
15
# Copyright © 2008-2019 Björn Påhlsson
 
16
#
 
17
# This file is part of Mandos.
 
18
#
 
19
# Mandos is free software: you can redistribute it and/or modify it
 
20
# under the terms of the GNU General Public License as published by
19
21
# the Free Software Foundation, either version 3 of the License, or
20
22
# (at your option) any later version.
21
23
#
22
 
#     This program is distributed in the hope that it will be useful,
23
 
#     but WITHOUT ANY WARRANTY; without even the implied warranty of
 
24
#     Mandos is distributed in the hope that it will be useful, but
 
25
#     WITHOUT ANY WARRANTY; without even the implied warranty of
24
26
#     MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
25
27
#     GNU General Public License for more details.
26
 
# 
 
28
#
27
29
# You should have received a copy of the GNU General Public License
28
 
# along with this program.  If not, see
29
 
# <http://www.gnu.org/licenses/>.
30
 
# 
 
30
# along with Mandos.  If not, see <http://www.gnu.org/licenses/>.
 
31
#
31
32
# Contact the authors at <mandos@recompile.se>.
32
 
# 
 
33
#
33
34
 
34
35
from __future__ import (division, absolute_import, print_function,
35
36
                        unicode_literals)
36
37
 
37
 
import SocketServer as socketserver
 
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
38
47
import socket
39
48
import argparse
40
49
import datetime
41
50
import errno
42
 
import gnutls.crypto
43
 
import gnutls.connection
44
 
import gnutls.errors
45
 
import gnutls.library.functions
46
 
import gnutls.library.constants
47
 
import gnutls.library.types
48
 
import ConfigParser as configparser
 
51
try:
 
52
    import ConfigParser as configparser
 
53
except ImportError:
 
54
    import configparser
49
55
import sys
50
56
import re
51
57
import os
60
66
import struct
61
67
import fcntl
62
68
import functools
63
 
import cPickle as pickle
 
69
try:
 
70
    import cPickle as pickle
 
71
except ImportError:
 
72
    import pickle
64
73
import multiprocessing
65
74
import types
66
75
import binascii
67
76
import tempfile
 
77
import itertools
 
78
import collections
 
79
import codecs
68
80
 
69
81
import dbus
70
82
import dbus.service
71
 
import gobject
72
 
import avahi
 
83
from gi.repository import GLib
73
84
from dbus.mainloop.glib import DBusGMainLoop
74
85
import ctypes
75
86
import ctypes.util
76
87
import xml.dom.minidom
77
88
import inspect
78
 
import GnuPGInterface
79
89
 
 
90
# Try to find the value of SO_BINDTODEVICE:
80
91
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:
81
94
    SO_BINDTODEVICE = socket.SO_BINDTODEVICE
82
95
except AttributeError:
83
96
    try:
 
97
        # This is where SO_BINDTODEVICE was up to and including Python
 
98
        # 2.6, and also 3.2:
84
99
        from IN import SO_BINDTODEVICE
85
100
    except ImportError:
86
 
        SO_BINDTODEVICE = None
87
 
 
88
 
version = "1.4.1"
 
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 = "1.8.4"
89
119
stored_state_file = "clients.pickle"
90
120
 
91
121
logger = logging.getLogger()
92
 
syslogger = (logging.handlers.SysLogHandler
93
 
             (facility = logging.handlers.SysLogHandler.LOG_DAEMON,
94
 
              address = str("/dev/log")))
 
122
syslogger = None
95
123
 
96
124
try:
97
 
    if_nametoindex = (ctypes.cdll.LoadLibrary
98
 
                      (ctypes.util.find_library("c"))
99
 
                      .if_nametoindex)
 
125
    if_nametoindex = ctypes.cdll.LoadLibrary(
 
126
        ctypes.util.find_library("c")).if_nametoindex
100
127
except (OSError, AttributeError):
 
128
 
101
129
    def if_nametoindex(interface):
102
130
        "Get an interface index the hard way, i.e. using fcntl()"
103
131
        SIOCGIFINDEX = 0x8933  # From /usr/include/linux/sockios.h
104
132
        with contextlib.closing(socket.socket()) as s:
105
133
            ifreq = fcntl.ioctl(s, SIOCGIFINDEX,
106
 
                                struct.pack(str("16s16x"),
107
 
                                            interface))
108
 
        interface_index = struct.unpack(str("I"),
109
 
                                        ifreq[16:20])[0]
 
134
                                struct.pack(b"16s16x", interface))
 
135
        interface_index = struct.unpack("I", ifreq[16:20])[0]
110
136
        return interface_index
111
137
 
112
138
 
 
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
 
113
155
def initlogger(debug, level=logging.WARNING):
114
156
    """init logger and add loglevel"""
115
 
    
 
157
 
 
158
    global syslogger
 
159
    syslogger = (logging.handlers.SysLogHandler(
 
160
        facility=logging.handlers.SysLogHandler.LOG_DAEMON,
 
161
        address="/dev/log"))
116
162
    syslogger.setFormatter(logging.Formatter
117
163
                           ('Mandos [%(process)d]: %(levelname)s:'
118
164
                            ' %(message)s'))
119
165
    logger.addHandler(syslogger)
120
 
    
 
166
 
121
167
    if debug:
122
168
        console = logging.StreamHandler()
123
169
        console.setFormatter(logging.Formatter('%(asctime)s %(name)s'
135
181
 
136
182
class PGPEngine(object):
137
183
    """A simple class for OpenPGP symmetric encryption & decryption"""
 
184
 
138
185
    def __init__(self):
139
 
        self.gnupg = GnuPGInterface.GnuPG()
140
186
        self.tempdir = tempfile.mkdtemp(prefix="mandos-")
141
 
        self.gnupg = GnuPGInterface.GnuPG()
142
 
        self.gnupg.options.meta_interactive = False
143
 
        self.gnupg.options.homedir = self.tempdir
144
 
        self.gnupg.options.extra_args.extend(['--force-mdc',
145
 
                                              '--quiet'])
146
 
    
 
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
 
147
206
    def __enter__(self):
148
207
        return self
149
 
    
150
 
    def __exit__ (self, exc_type, exc_value, traceback):
 
208
 
 
209
    def __exit__(self, exc_type, exc_value, traceback):
151
210
        self._cleanup()
152
211
        return False
153
 
    
 
212
 
154
213
    def __del__(self):
155
214
        self._cleanup()
156
 
    
 
215
 
157
216
    def _cleanup(self):
158
217
        if self.tempdir is not None:
159
218
            # Delete contents of tempdir
160
219
            for root, dirs, files in os.walk(self.tempdir,
161
 
                                             topdown = False):
 
220
                                             topdown=False):
162
221
                for filename in files:
163
222
                    os.remove(os.path.join(root, filename))
164
223
                for dirname in dirs:
166
225
            # Remove tempdir
167
226
            os.rmdir(self.tempdir)
168
227
            self.tempdir = None
169
 
    
 
228
 
170
229
    def password_encode(self, password):
171
230
        # Passphrase can not be empty and can not contain newlines or
172
231
        # NUL bytes.  So we prefix it and hex encode it.
173
 
        return b"mandos" + binascii.hexlify(password)
174
 
    
 
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
 
175
240
    def encrypt(self, data, password):
176
 
        self.gnupg.passphrase = self.password_encode(password)
177
 
        with open(os.devnull) as devnull:
178
 
            try:
179
 
                proc = self.gnupg.run(['--symmetric'],
180
 
                                      create_fhs=['stdin', 'stdout'],
181
 
                                      attach_fhs={'stderr': devnull})
182
 
                with contextlib.closing(proc.handles['stdin']) as f:
183
 
                    f.write(data)
184
 
                with contextlib.closing(proc.handles['stdout']) as f:
185
 
                    ciphertext = f.read()
186
 
                proc.wait()
187
 
            except IOError as e:
188
 
                raise PGPError(e)
189
 
        self.gnupg.passphrase = None
 
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)
190
256
        return ciphertext
191
 
    
 
257
 
192
258
    def decrypt(self, data, password):
193
 
        self.gnupg.passphrase = self.password_encode(password)
194
 
        with open(os.devnull) as devnull:
195
 
            try:
196
 
                proc = self.gnupg.run(['--decrypt'],
197
 
                                      create_fhs=['stdin', 'stdout'],
198
 
                                      attach_fhs={'stderr': devnull})
199
 
                with contextlib.closing(proc.handles['stdin'] ) as f:
200
 
                    f.write(data)
201
 
                with contextlib.closing(proc.handles['stdout']) as f:
202
 
                    decrypted_plaintext = f.read()
203
 
                proc.wait()
204
 
            except IOError as e:
205
 
                raise PGPError(e)
206
 
        self.gnupg.passphrase = None
 
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)
207
274
        return decrypted_plaintext
208
275
 
209
276
 
 
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
    IF_UNSPEC = -1               # avahi-common/address.h
 
281
    PROTO_UNSPEC = -1            # avahi-common/address.h
 
282
    PROTO_INET = 0               # avahi-common/address.h
 
283
    PROTO_INET6 = 1              # avahi-common/address.h
 
284
    DBUS_NAME = "org.freedesktop.Avahi"
 
285
    DBUS_INTERFACE_ENTRY_GROUP = DBUS_NAME + ".EntryGroup"
 
286
    DBUS_INTERFACE_SERVER = DBUS_NAME + ".Server"
 
287
    DBUS_PATH_SERVER = "/"
 
288
 
 
289
    @staticmethod
 
290
    def string_array_to_txt_array(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
 
210
302
 
211
303
class AvahiError(Exception):
212
304
    def __init__(self, value, *args, **kwargs):
213
305
        self.value = value
214
 
        super(AvahiError, self).__init__(value, *args, **kwargs)
215
 
    def __unicode__(self):
216
 
        return unicode(repr(self.value))
 
306
        return super(AvahiError, self).__init__(value, *args,
 
307
                                                **kwargs)
 
308
 
217
309
 
218
310
class AvahiServiceError(AvahiError):
219
311
    pass
220
312
 
 
313
 
221
314
class AvahiGroupError(AvahiError):
222
315
    pass
223
316
 
224
317
 
225
318
class AvahiService(object):
226
319
    """An Avahi (Zeroconf) service.
227
 
    
 
320
 
228
321
    Attributes:
229
322
    interface: integer; avahi.IF_UNSPEC or an interface index.
230
323
               Used to optionally bind to the specified interface.
231
324
    name: string; Example: 'Mandos'
232
325
    type: string; Example: '_mandos._tcp'.
233
 
                  See <http://www.dns-sd.org/ServiceTypes.html>
 
326
     See <https://www.iana.org/assignments/service-names-port-numbers>
234
327
    port: integer; what port to announce
235
328
    TXT: list of strings; TXT record for the service
236
329
    domain: string; Domain to publish on, default to .local if empty.
242
335
    server: D-Bus Server
243
336
    bus: dbus.SystemBus()
244
337
    """
245
 
    def __init__(self, interface = avahi.IF_UNSPEC, name = None,
246
 
                 servicetype = None, port = None, TXT = None,
247
 
                 domain = "", host = "", max_renames = 32768,
248
 
                 protocol = avahi.PROTO_UNSPEC, bus = None):
 
338
 
 
339
    def __init__(self,
 
340
                 interface=avahi.IF_UNSPEC,
 
341
                 name=None,
 
342
                 servicetype=None,
 
343
                 port=None,
 
344
                 TXT=None,
 
345
                 domain="",
 
346
                 host="",
 
347
                 max_renames=32768,
 
348
                 protocol=avahi.PROTO_UNSPEC,
 
349
                 bus=None):
249
350
        self.interface = interface
250
351
        self.name = name
251
352
        self.type = servicetype
260
361
        self.server = None
261
362
        self.bus = bus
262
363
        self.entry_group_state_changed_match = None
263
 
    def rename(self):
 
364
 
 
365
    def rename(self, remove=True):
264
366
        """Derived from the Avahi example code"""
265
367
        if self.rename_count >= self.max_renames:
266
368
            logger.critical("No suitable Zeroconf service name found"
267
369
                            " after %i retries, exiting.",
268
370
                            self.rename_count)
269
371
            raise AvahiServiceError("Too many renames")
270
 
        self.name = unicode(self.server
271
 
                            .GetAlternativeServiceName(self.name))
 
372
        self.name = str(
 
373
            self.server.GetAlternativeServiceName(self.name))
 
374
        self.rename_count += 1
272
375
        logger.info("Changing Zeroconf service name to %r ...",
273
376
                    self.name)
274
 
        self.remove()
 
377
        if remove:
 
378
            self.remove()
275
379
        try:
276
380
            self.add()
277
381
        except dbus.exceptions.DBusException as error:
278
 
            logger.critical("DBusException: %s", error)
279
 
            self.cleanup()
280
 
            os._exit(1)
281
 
        self.rename_count += 1
 
382
            if (error.get_dbus_name()
 
383
                == "org.freedesktop.Avahi.CollisionError"):
 
384
                logger.info("Local Zeroconf service name collision.")
 
385
                return self.rename(remove=False)
 
386
            else:
 
387
                logger.critical("D-Bus Exception", exc_info=error)
 
388
                self.cleanup()
 
389
                os._exit(1)
 
390
 
282
391
    def remove(self):
283
392
        """Derived from the Avahi example code"""
284
393
        if self.entry_group_state_changed_match is not None:
286
395
            self.entry_group_state_changed_match = None
287
396
        if self.group is not None:
288
397
            self.group.Reset()
 
398
 
289
399
    def add(self):
290
400
        """Derived from the Avahi example code"""
291
401
        self.remove()
308
418
            dbus.UInt16(self.port),
309
419
            avahi.string_array_to_txt_array(self.TXT))
310
420
        self.group.Commit()
 
421
 
311
422
    def entry_group_state_changed(self, state, error):
312
423
        """Derived from the Avahi example code"""
313
424
        logger.debug("Avahi entry group state change: %i", state)
314
 
        
 
425
 
315
426
        if state == avahi.ENTRY_GROUP_ESTABLISHED:
316
427
            logger.debug("Zeroconf service established.")
317
428
        elif state == avahi.ENTRY_GROUP_COLLISION:
319
430
            self.rename()
320
431
        elif state == avahi.ENTRY_GROUP_FAILURE:
321
432
            logger.critical("Avahi: Error in group state changed %s",
322
 
                            unicode(error))
323
 
            raise AvahiGroupError("State changed: %s"
324
 
                                  % unicode(error))
 
433
                            str(error))
 
434
            raise AvahiGroupError("State changed: {!s}".format(error))
 
435
 
325
436
    def cleanup(self):
326
437
        """Derived from the Avahi example code"""
327
438
        if self.group is not None:
332
443
                pass
333
444
            self.group = None
334
445
        self.remove()
 
446
 
335
447
    def server_state_changed(self, state, error=None):
336
448
        """Derived from the Avahi example code"""
337
449
        logger.debug("Avahi server state change: %i", state)
338
 
        bad_states = { avahi.SERVER_INVALID:
339
 
                           "Zeroconf server invalid",
340
 
                       avahi.SERVER_REGISTERING: None,
341
 
                       avahi.SERVER_COLLISION:
342
 
                           "Zeroconf server name collision",
343
 
                       avahi.SERVER_FAILURE:
344
 
                           "Zeroconf server failure" }
 
450
        bad_states = {
 
451
            avahi.SERVER_INVALID: "Zeroconf server invalid",
 
452
            avahi.SERVER_REGISTERING: None,
 
453
            avahi.SERVER_COLLISION: "Zeroconf server name collision",
 
454
            avahi.SERVER_FAILURE: "Zeroconf server failure",
 
455
        }
345
456
        if state in bad_states:
346
457
            if bad_states[state] is not None:
347
458
                if error is None:
350
461
                    logger.error(bad_states[state] + ": %r", error)
351
462
            self.cleanup()
352
463
        elif state == avahi.SERVER_RUNNING:
353
 
            self.add()
 
464
            try:
 
465
                self.add()
 
466
            except dbus.exceptions.DBusException as error:
 
467
                if (error.get_dbus_name()
 
468
                    == "org.freedesktop.Avahi.CollisionError"):
 
469
                    logger.info("Local Zeroconf service name"
 
470
                                " collision.")
 
471
                    return self.rename(remove=False)
 
472
                else:
 
473
                    logger.critical("D-Bus Exception", exc_info=error)
 
474
                    self.cleanup()
 
475
                    os._exit(1)
354
476
        else:
355
477
            if error is None:
356
478
                logger.debug("Unknown state: %r", state)
357
479
            else:
358
480
                logger.debug("Unknown state: %r: %r", state, error)
 
481
 
359
482
    def activate(self):
360
483
        """Derived from the Avahi example code"""
361
484
        if self.server is None:
365
488
                                    follow_name_owner_changes=True),
366
489
                avahi.DBUS_INTERFACE_SERVER)
367
490
        self.server.connect_to_signal("StateChanged",
368
 
                                 self.server_state_changed)
 
491
                                      self.server_state_changed)
369
492
        self.server_state_changed(self.server.GetState())
370
493
 
 
494
 
371
495
class AvahiServiceToSyslog(AvahiService):
372
 
    def rename(self):
 
496
    def rename(self, *args, **kwargs):
373
497
        """Add the new name to the syslog messages"""
374
 
        ret = AvahiService.rename(self)
375
 
        syslogger.setFormatter(logging.Formatter
376
 
                               ('Mandos (%s) [%%(process)d]:'
377
 
                                ' %%(levelname)s: %%(message)s'
378
 
                                % self.name))
 
498
        ret = super(AvahiServiceToSyslog, self).rename(*args, **kwargs)
 
499
        syslogger.setFormatter(logging.Formatter(
 
500
            'Mandos ({}) [%(process)d]: %(levelname)s: %(message)s'
 
501
            .format(self.name)))
379
502
        return ret
380
503
 
381
 
def timedelta_to_milliseconds(td):
382
 
    "Convert a datetime.timedelta() to milliseconds"
383
 
    return ((td.days * 24 * 60 * 60 * 1000)
384
 
            + (td.seconds * 1000)
385
 
            + (td.microseconds // 1000))
386
 
        
 
504
 
 
505
# Pretend that we have a GnuTLS module
 
506
class gnutls(object):
 
507
    """This isn't so much a class as it is a module-like namespace."""
 
508
 
 
509
    library = ctypes.util.find_library("gnutls")
 
510
    if library is None:
 
511
        library = ctypes.util.find_library("gnutls-deb0")
 
512
    _library = ctypes.cdll.LoadLibrary(library)
 
513
    del library
 
514
 
 
515
    # Unless otherwise indicated, the constants and types below are
 
516
    # all from the gnutls/gnutls.h C header file.
 
517
 
 
518
    # Constants
 
519
    E_SUCCESS = 0
 
520
    E_INTERRUPTED = -52
 
521
    E_AGAIN = -28
 
522
    CRT_OPENPGP = 2
 
523
    CRT_RAWPK = 3
 
524
    CLIENT = 2
 
525
    SHUT_RDWR = 0
 
526
    CRD_CERTIFICATE = 1
 
527
    E_NO_CERTIFICATE_FOUND = -49
 
528
    X509_FMT_DER = 0
 
529
    NO_TICKETS = 1<<10
 
530
    ENABLE_RAWPK = 1<<18
 
531
    CTYPE_PEERS = 3
 
532
    KEYID_USE_SHA256 = 1        # gnutls/x509.h
 
533
    OPENPGP_FMT_RAW = 0         # gnutls/openpgp.h
 
534
 
 
535
    # Types
 
536
    class session_int(ctypes.Structure):
 
537
        _fields_ = []
 
538
    session_t = ctypes.POINTER(session_int)
 
539
 
 
540
    class certificate_credentials_st(ctypes.Structure):
 
541
        _fields_ = []
 
542
    certificate_credentials_t = ctypes.POINTER(
 
543
        certificate_credentials_st)
 
544
    certificate_type_t = ctypes.c_int
 
545
 
 
546
    class datum_t(ctypes.Structure):
 
547
        _fields_ = [('data', ctypes.POINTER(ctypes.c_ubyte)),
 
548
                    ('size', ctypes.c_uint)]
 
549
 
 
550
    class openpgp_crt_int(ctypes.Structure):
 
551
        _fields_ = []
 
552
    openpgp_crt_t = ctypes.POINTER(openpgp_crt_int)
 
553
    openpgp_crt_fmt_t = ctypes.c_int  # gnutls/openpgp.h
 
554
    log_func = ctypes.CFUNCTYPE(None, ctypes.c_int, ctypes.c_char_p)
 
555
    credentials_type_t = ctypes.c_int
 
556
    transport_ptr_t = ctypes.c_void_p
 
557
    close_request_t = ctypes.c_int
 
558
 
 
559
    # Exceptions
 
560
    class Error(Exception):
 
561
        def __init__(self, message=None, code=None, args=()):
 
562
            # Default usage is by a message string, but if a return
 
563
            # code is passed, convert it to a string with
 
564
            # gnutls.strerror()
 
565
            self.code = code
 
566
            if message is None and code is not None:
 
567
                message = gnutls.strerror(code)
 
568
            return super(gnutls.Error, self).__init__(
 
569
                message, *args)
 
570
 
 
571
    class CertificateSecurityError(Error):
 
572
        pass
 
573
 
 
574
    # Classes
 
575
    class Credentials(object):
 
576
        def __init__(self):
 
577
            self._c_object = gnutls.certificate_credentials_t()
 
578
            gnutls.certificate_allocate_credentials(
 
579
                ctypes.byref(self._c_object))
 
580
            self.type = gnutls.CRD_CERTIFICATE
 
581
 
 
582
        def __del__(self):
 
583
            gnutls.certificate_free_credentials(self._c_object)
 
584
 
 
585
    class ClientSession(object):
 
586
        def __init__(self, socket, credentials=None):
 
587
            self._c_object = gnutls.session_t()
 
588
            gnutls_flags = gnutls.CLIENT
 
589
            if gnutls.check_version("3.5.6"):
 
590
                gnutls_flags |= gnutls.NO_TICKETS
 
591
            if gnutls.has_rawpk:
 
592
                gnutls_flags |= gnutls.ENABLE_RAWPK
 
593
            gnutls.init(ctypes.byref(self._c_object), gnutls_flags)
 
594
            del gnutls_flags
 
595
            gnutls.set_default_priority(self._c_object)
 
596
            gnutls.transport_set_ptr(self._c_object, socket.fileno())
 
597
            gnutls.handshake_set_private_extensions(self._c_object,
 
598
                                                    True)
 
599
            self.socket = socket
 
600
            if credentials is None:
 
601
                credentials = gnutls.Credentials()
 
602
            gnutls.credentials_set(self._c_object, credentials.type,
 
603
                                   ctypes.cast(credentials._c_object,
 
604
                                               ctypes.c_void_p))
 
605
            self.credentials = credentials
 
606
 
 
607
        def __del__(self):
 
608
            gnutls.deinit(self._c_object)
 
609
 
 
610
        def handshake(self):
 
611
            return gnutls.handshake(self._c_object)
 
612
 
 
613
        def send(self, data):
 
614
            data = bytes(data)
 
615
            data_len = len(data)
 
616
            while data_len > 0:
 
617
                data_len -= gnutls.record_send(self._c_object,
 
618
                                               data[-data_len:],
 
619
                                               data_len)
 
620
 
 
621
        def bye(self):
 
622
            return gnutls.bye(self._c_object, gnutls.SHUT_RDWR)
 
623
 
 
624
    # Error handling functions
 
625
    def _error_code(result):
 
626
        """A function to raise exceptions on errors, suitable
 
627
        for the 'restype' attribute on ctypes functions"""
 
628
        if result >= 0:
 
629
            return result
 
630
        if result == gnutls.E_NO_CERTIFICATE_FOUND:
 
631
            raise gnutls.CertificateSecurityError(code=result)
 
632
        raise gnutls.Error(code=result)
 
633
 
 
634
    def _retry_on_error(result, func, arguments):
 
635
        """A function to retry on some errors, suitable
 
636
        for the 'errcheck' attribute on ctypes functions"""
 
637
        while result < 0:
 
638
            if result not in (gnutls.E_INTERRUPTED, gnutls.E_AGAIN):
 
639
                return _error_code(result)
 
640
            result = func(*arguments)
 
641
        return result
 
642
 
 
643
    # Unless otherwise indicated, the function declarations below are
 
644
    # all from the gnutls/gnutls.h C header file.
 
645
 
 
646
    # Functions
 
647
    priority_set_direct = _library.gnutls_priority_set_direct
 
648
    priority_set_direct.argtypes = [session_t, ctypes.c_char_p,
 
649
                                    ctypes.POINTER(ctypes.c_char_p)]
 
650
    priority_set_direct.restype = _error_code
 
651
 
 
652
    init = _library.gnutls_init
 
653
    init.argtypes = [ctypes.POINTER(session_t), ctypes.c_int]
 
654
    init.restype = _error_code
 
655
 
 
656
    set_default_priority = _library.gnutls_set_default_priority
 
657
    set_default_priority.argtypes = [session_t]
 
658
    set_default_priority.restype = _error_code
 
659
 
 
660
    record_send = _library.gnutls_record_send
 
661
    record_send.argtypes = [session_t, ctypes.c_void_p,
 
662
                            ctypes.c_size_t]
 
663
    record_send.restype = ctypes.c_ssize_t
 
664
    record_send.errcheck = _retry_on_error
 
665
 
 
666
    certificate_allocate_credentials = (
 
667
        _library.gnutls_certificate_allocate_credentials)
 
668
    certificate_allocate_credentials.argtypes = [
 
669
        ctypes.POINTER(certificate_credentials_t)]
 
670
    certificate_allocate_credentials.restype = _error_code
 
671
 
 
672
    certificate_free_credentials = (
 
673
        _library.gnutls_certificate_free_credentials)
 
674
    certificate_free_credentials.argtypes = [
 
675
        certificate_credentials_t]
 
676
    certificate_free_credentials.restype = None
 
677
 
 
678
    handshake_set_private_extensions = (
 
679
        _library.gnutls_handshake_set_private_extensions)
 
680
    handshake_set_private_extensions.argtypes = [session_t,
 
681
                                                 ctypes.c_int]
 
682
    handshake_set_private_extensions.restype = None
 
683
 
 
684
    credentials_set = _library.gnutls_credentials_set
 
685
    credentials_set.argtypes = [session_t, credentials_type_t,
 
686
                                ctypes.c_void_p]
 
687
    credentials_set.restype = _error_code
 
688
 
 
689
    strerror = _library.gnutls_strerror
 
690
    strerror.argtypes = [ctypes.c_int]
 
691
    strerror.restype = ctypes.c_char_p
 
692
 
 
693
    certificate_type_get = _library.gnutls_certificate_type_get
 
694
    certificate_type_get.argtypes = [session_t]
 
695
    certificate_type_get.restype = _error_code
 
696
 
 
697
    certificate_get_peers = _library.gnutls_certificate_get_peers
 
698
    certificate_get_peers.argtypes = [session_t,
 
699
                                      ctypes.POINTER(ctypes.c_uint)]
 
700
    certificate_get_peers.restype = ctypes.POINTER(datum_t)
 
701
 
 
702
    global_set_log_level = _library.gnutls_global_set_log_level
 
703
    global_set_log_level.argtypes = [ctypes.c_int]
 
704
    global_set_log_level.restype = None
 
705
 
 
706
    global_set_log_function = _library.gnutls_global_set_log_function
 
707
    global_set_log_function.argtypes = [log_func]
 
708
    global_set_log_function.restype = None
 
709
 
 
710
    deinit = _library.gnutls_deinit
 
711
    deinit.argtypes = [session_t]
 
712
    deinit.restype = None
 
713
 
 
714
    handshake = _library.gnutls_handshake
 
715
    handshake.argtypes = [session_t]
 
716
    handshake.restype = _error_code
 
717
    handshake.errcheck = _retry_on_error
 
718
 
 
719
    transport_set_ptr = _library.gnutls_transport_set_ptr
 
720
    transport_set_ptr.argtypes = [session_t, transport_ptr_t]
 
721
    transport_set_ptr.restype = None
 
722
 
 
723
    bye = _library.gnutls_bye
 
724
    bye.argtypes = [session_t, close_request_t]
 
725
    bye.restype = _error_code
 
726
    bye.errcheck = _retry_on_error
 
727
 
 
728
    check_version = _library.gnutls_check_version
 
729
    check_version.argtypes = [ctypes.c_char_p]
 
730
    check_version.restype = ctypes.c_char_p
 
731
 
 
732
    _need_version = b"3.3.0"
 
733
    if check_version(_need_version) is None:
 
734
        raise self.Error("Needs GnuTLS {} or later"
 
735
                         .format(_need_version))
 
736
 
 
737
    _tls_rawpk_version = b"3.6.6"
 
738
    has_rawpk = bool(check_version(_tls_rawpk_version))
 
739
 
 
740
    if has_rawpk:
 
741
        # Types
 
742
        class pubkey_st(ctypes.Structure):
 
743
            _fields = []
 
744
        pubkey_t = ctypes.POINTER(pubkey_st)
 
745
 
 
746
        x509_crt_fmt_t = ctypes.c_int
 
747
 
 
748
        # All the function declarations below are from gnutls/abstract.h
 
749
        pubkey_init = _library.gnutls_pubkey_init
 
750
        pubkey_init.argtypes = [ctypes.POINTER(pubkey_t)]
 
751
        pubkey_init.restype = _error_code
 
752
 
 
753
        pubkey_import = _library.gnutls_pubkey_import
 
754
        pubkey_import.argtypes = [pubkey_t, ctypes.POINTER(datum_t),
 
755
                                  x509_crt_fmt_t]
 
756
        pubkey_import.restype = _error_code
 
757
 
 
758
        pubkey_get_key_id = _library.gnutls_pubkey_get_key_id
 
759
        pubkey_get_key_id.argtypes = [pubkey_t, ctypes.c_int,
 
760
                                      ctypes.POINTER(ctypes.c_ubyte),
 
761
                                      ctypes.POINTER(ctypes.c_size_t)]
 
762
        pubkey_get_key_id.restype = _error_code
 
763
 
 
764
        pubkey_deinit = _library.gnutls_pubkey_deinit
 
765
        pubkey_deinit.argtypes = [pubkey_t]
 
766
        pubkey_deinit.restype = None
 
767
    else:
 
768
        # All the function declarations below are from gnutls/openpgp.h
 
769
 
 
770
        openpgp_crt_init = _library.gnutls_openpgp_crt_init
 
771
        openpgp_crt_init.argtypes = [ctypes.POINTER(openpgp_crt_t)]
 
772
        openpgp_crt_init.restype = _error_code
 
773
 
 
774
        openpgp_crt_import = _library.gnutls_openpgp_crt_import
 
775
        openpgp_crt_import.argtypes = [openpgp_crt_t,
 
776
                                       ctypes.POINTER(datum_t),
 
777
                                       openpgp_crt_fmt_t]
 
778
        openpgp_crt_import.restype = _error_code
 
779
 
 
780
        openpgp_crt_verify_self = _library.gnutls_openpgp_crt_verify_self
 
781
        openpgp_crt_verify_self.argtypes = [openpgp_crt_t, ctypes.c_uint,
 
782
                                            ctypes.POINTER(ctypes.c_uint)]
 
783
        openpgp_crt_verify_self.restype = _error_code
 
784
 
 
785
        openpgp_crt_deinit = _library.gnutls_openpgp_crt_deinit
 
786
        openpgp_crt_deinit.argtypes = [openpgp_crt_t]
 
787
        openpgp_crt_deinit.restype = None
 
788
 
 
789
        openpgp_crt_get_fingerprint = (
 
790
            _library.gnutls_openpgp_crt_get_fingerprint)
 
791
        openpgp_crt_get_fingerprint.argtypes = [openpgp_crt_t,
 
792
                                                ctypes.c_void_p,
 
793
                                                ctypes.POINTER(
 
794
                                                    ctypes.c_size_t)]
 
795
        openpgp_crt_get_fingerprint.restype = _error_code
 
796
 
 
797
    if check_version("3.6.4"):
 
798
        certificate_type_get2 = _library.gnutls_certificate_type_get2
 
799
        certificate_type_get2.argtypes = [session_t, ctypes.c_int]
 
800
        certificate_type_get2.restype = _error_code
 
801
 
 
802
    # Remove non-public functions
 
803
    del _error_code, _retry_on_error
 
804
 
 
805
 
 
806
def call_pipe(connection,       # : multiprocessing.Connection
 
807
              func, *args, **kwargs):
 
808
    """This function is meant to be called by multiprocessing.Process
 
809
 
 
810
    This function runs func(*args, **kwargs), and writes the resulting
 
811
    return value on the provided multiprocessing.Connection.
 
812
    """
 
813
    connection.send(func(*args, **kwargs))
 
814
    connection.close()
 
815
 
 
816
 
387
817
class Client(object):
388
818
    """A representation of a client host served by this server.
389
 
    
 
819
 
390
820
    Attributes:
391
821
    approved:   bool(); 'None' if not yet approved/disapproved
392
822
    approval_delay: datetime.timedelta(); Time to wait for approval
394
824
    checker:    subprocess.Popen(); a running checker process used
395
825
                                    to see if the client lives.
396
826
                                    'None' if no process is running.
397
 
    checker_callback_tag: a gobject event source tag, or None
 
827
    checker_callback_tag: a GLib event source tag, or None
398
828
    checker_command: string; External command which is run to check
399
829
                     if client lives.  %() expansions are done at
400
830
                     runtime with vars(self) as dict, so that for
401
831
                     instance %(name)s can be used in the command.
402
 
    checker_initiator_tag: a gobject event source tag, or None
 
832
    checker_initiator_tag: a GLib event source tag, or None
403
833
    created:    datetime.datetime(); (UTC) object creation
404
834
    client_structure: Object describing what attributes a client has
405
835
                      and is used for storing the client at exit
406
836
    current_checker_command: string; current running checker_command
407
 
    disable_initiator_tag: a gobject event source tag, or None
 
837
    disable_initiator_tag: a GLib event source tag, or None
408
838
    enabled:    bool()
409
839
    fingerprint: string (40 or 32 hexadecimal digits); used to
410
 
                 uniquely identify the client
 
840
                 uniquely identify an OpenPGP client
 
841
    key_id: string (64 hexadecimal digits); used to uniquely identify
 
842
            a client using raw public keys
411
843
    host:       string; available for use by the checker command
412
844
    interval:   datetime.timedelta(); How often to start a new checker
413
845
    last_approval_request: datetime.datetime(); (UTC) or None
414
846
    last_checked_ok: datetime.datetime(); (UTC) or None
415
847
    last_checker_status: integer between 0 and 255 reflecting exit
416
848
                         status of last checker. -1 reflects crashed
417
 
                         checker, or None.
 
849
                         checker, -2 means no checker completed yet.
 
850
    last_checker_signal: The signal which killed the last checker, if
 
851
                         last_checker_status is -1
418
852
    last_enabled: datetime.datetime(); (UTC) or None
419
853
    name:       string; from the config file, used in log messages and
420
854
                        D-Bus identifiers
421
855
    secret:     bytestring; sent verbatim (over TLS) to client
422
856
    timeout:    datetime.timedelta(); How long from last_checked_ok
423
857
                                      until this client is disabled
424
 
    extended_timeout:   extra long timeout when password has been sent
 
858
    extended_timeout:   extra long timeout when secret has been sent
425
859
    runtime_expansions: Allowed attributes for runtime expansion.
426
860
    expires:    datetime.datetime(); time (UTC) when a client will be
427
861
                disabled, or None
 
862
    server_settings: The server_settings dict from main()
428
863
    """
429
 
    
 
864
 
430
865
    runtime_expansions = ("approval_delay", "approval_duration",
431
 
                          "created", "enabled", "fingerprint",
432
 
                          "host", "interval", "last_checked_ok",
 
866
                          "created", "enabled", "expires", "key_id",
 
867
                          "fingerprint", "host", "interval",
 
868
                          "last_approval_request", "last_checked_ok",
433
869
                          "last_enabled", "name", "timeout")
434
 
    client_defaults = { "timeout": "5m",
435
 
                        "extended_timeout": "15m",
436
 
                        "interval": "2m",
437
 
                        "checker": "fping -q -- %%(host)s",
438
 
                        "host": "",
439
 
                        "approval_delay": "0s",
440
 
                        "approval_duration": "1s",
441
 
                        "approved_by_default": "True",
442
 
                        "enabled": "True",
443
 
                        }
444
 
    
445
 
    def timeout_milliseconds(self):
446
 
        "Return the 'timeout' attribute in milliseconds"
447
 
        return timedelta_to_milliseconds(self.timeout)
448
 
    
449
 
    def extended_timeout_milliseconds(self):
450
 
        "Return the 'extended_timeout' attribute in milliseconds"
451
 
        return timedelta_to_milliseconds(self.extended_timeout)
452
 
    
453
 
    def interval_milliseconds(self):
454
 
        "Return the 'interval' attribute in milliseconds"
455
 
        return timedelta_to_milliseconds(self.interval)
456
 
    
457
 
    def approval_delay_milliseconds(self):
458
 
        return timedelta_to_milliseconds(self.approval_delay)
 
870
    client_defaults = {
 
871
        "timeout": "PT5M",
 
872
        "extended_timeout": "PT15M",
 
873
        "interval": "PT2M",
 
874
        "checker": "fping -q -- %%(host)s",
 
875
        "host": "",
 
876
        "approval_delay": "PT0S",
 
877
        "approval_duration": "PT1S",
 
878
        "approved_by_default": "True",
 
879
        "enabled": "True",
 
880
    }
459
881
 
460
882
    @staticmethod
461
883
    def config_parser(config):
462
 
        """ Construct a new dict of client settings of this form:
 
884
        """Construct a new dict of client settings of this form:
463
885
        { client_name: {setting_name: value, ...}, ...}
464
 
        with exceptions for any special settings as defined above"""
 
886
        with exceptions for any special settings as defined above.
 
887
        NOTE: Must be a pure function. Must return the same result
 
888
        value given the same arguments.
 
889
        """
465
890
        settings = {}
466
891
        for client_name in config.sections():
467
892
            section = dict(config.items(client_name))
468
893
            client = settings[client_name] = {}
469
 
            
 
894
 
470
895
            client["host"] = section["host"]
471
896
            # Reformat values from string types to Python types
472
897
            client["approved_by_default"] = config.getboolean(
473
898
                client_name, "approved_by_default")
474
 
            client["enabled"] = config.getboolean(client_name, "enabled")
475
 
            
 
899
            client["enabled"] = config.getboolean(client_name,
 
900
                                                  "enabled")
 
901
 
 
902
            # Uppercase and remove spaces from key_id and fingerprint
 
903
            # for later comparison purposes with return value from the
 
904
            # key_id() and fingerprint() functions
 
905
            client["key_id"] = (section.get("key_id", "").upper()
 
906
                                .replace(" ", ""))
476
907
            client["fingerprint"] = (section["fingerprint"].upper()
477
908
                                     .replace(" ", ""))
478
909
            if "secret" in section:
479
 
                client["secret"] = section["secret"].decode("base64")
 
910
                client["secret"] = codecs.decode(section["secret"]
 
911
                                                 .encode("utf-8"),
 
912
                                                 "base64")
480
913
            elif "secfile" in section:
481
914
                with open(os.path.expanduser(os.path.expandvars
482
915
                                             (section["secfile"])),
483
916
                          "rb") as secfile:
484
917
                    client["secret"] = secfile.read()
485
918
            else:
486
 
                raise TypeError("No secret or secfile for section %s"
487
 
                                % section)
 
919
                raise TypeError("No secret or secfile for section {}"
 
920
                                .format(section))
488
921
            client["timeout"] = string_to_delta(section["timeout"])
489
922
            client["extended_timeout"] = string_to_delta(
490
923
                section["extended_timeout"])
496
929
            client["checker_command"] = section["checker"]
497
930
            client["last_approval_request"] = None
498
931
            client["last_checked_ok"] = None
499
 
            client["last_checker_status"] = None
500
 
            if client["enabled"]:
501
 
                client["last_enabled"] = datetime.datetime.utcnow()
502
 
                client["expires"] = (datetime.datetime.utcnow()
503
 
                                     + client["timeout"])
504
 
            else:
505
 
                client["last_enabled"] = None
506
 
                client["expires"] = None
 
932
            client["last_checker_status"] = -2
507
933
 
508
934
        return settings
509
 
        
510
 
        
511
 
    def __init__(self, settings, name = None):
512
 
        """Note: the 'checker' key in 'config' sets the
513
 
        'checker_command' attribute and *not* the 'checker'
514
 
        attribute."""
 
935
 
 
936
    def __init__(self, settings, name=None, server_settings=None):
515
937
        self.name = name
 
938
        if server_settings is None:
 
939
            server_settings = {}
 
940
        self.server_settings = server_settings
516
941
        # adding all client settings
517
 
        for setting, value in settings.iteritems():
 
942
        for setting, value in settings.items():
518
943
            setattr(self, setting, value)
519
 
        
 
944
 
 
945
        if self.enabled:
 
946
            if not hasattr(self, "last_enabled"):
 
947
                self.last_enabled = datetime.datetime.utcnow()
 
948
            if not hasattr(self, "expires"):
 
949
                self.expires = (datetime.datetime.utcnow()
 
950
                                + self.timeout)
 
951
        else:
 
952
            self.last_enabled = None
 
953
            self.expires = None
 
954
 
520
955
        logger.debug("Creating client %r", self.name)
521
 
        # Uppercase and remove spaces from fingerprint for later
522
 
        # comparison purposes with return value from the fingerprint()
523
 
        # function
 
956
        logger.debug("  Key ID: %s", self.key_id)
524
957
        logger.debug("  Fingerprint: %s", self.fingerprint)
525
 
        self.created = settings.get("created", datetime.datetime.utcnow())
 
958
        self.created = settings.get("created",
 
959
                                    datetime.datetime.utcnow())
526
960
 
527
961
        # attributes specific for this server instance
528
962
        self.checker = None
532
966
        self.current_checker_command = None
533
967
        self.approved = None
534
968
        self.approvals_pending = 0
535
 
        self.changedstate = (multiprocessing_manager
536
 
                             .Condition(multiprocessing_manager
537
 
                                        .Lock()))
538
 
        self.client_structure = [attr for attr in
539
 
                                 self.__dict__.iterkeys()
 
969
        self.changedstate = multiprocessing_manager.Condition(
 
970
            multiprocessing_manager.Lock())
 
971
        self.client_structure = [attr
 
972
                                 for attr in self.__dict__.keys()
540
973
                                 if not attr.startswith("_")]
541
974
        self.client_structure.append("client_structure")
542
 
        
543
 
        for name, t in inspect.getmembers(type(self),
544
 
                                          lambda obj:
545
 
                                              isinstance(obj,
546
 
                                                         property)):
 
975
 
 
976
        for name, t in inspect.getmembers(
 
977
                type(self), lambda obj: isinstance(obj, property)):
547
978
            if not name.startswith("_"):
548
979
                self.client_structure.append(name)
549
 
    
 
980
 
550
981
    # Send notice to process children that client state has changed
551
982
    def send_changedstate(self):
552
983
        with self.changedstate:
553
984
            self.changedstate.notify_all()
554
 
    
 
985
 
555
986
    def enable(self):
556
987
        """Start this client's checker and timeout hooks"""
557
988
        if getattr(self, "enabled", False):
558
989
            # Already enabled
559
990
            return
560
 
        self.send_changedstate()
561
991
        self.expires = datetime.datetime.utcnow() + self.timeout
562
992
        self.enabled = True
563
993
        self.last_enabled = datetime.datetime.utcnow()
564
994
        self.init_checker()
565
 
    
 
995
        self.send_changedstate()
 
996
 
566
997
    def disable(self, quiet=True):
567
998
        """Disable this client."""
568
999
        if not getattr(self, "enabled", False):
569
1000
            return False
570
1001
        if not quiet:
571
 
            self.send_changedstate()
572
 
        if not quiet:
573
1002
            logger.info("Disabling client %s", self.name)
574
 
        if getattr(self, "disable_initiator_tag", False):
575
 
            gobject.source_remove(self.disable_initiator_tag)
 
1003
        if getattr(self, "disable_initiator_tag", None) is not None:
 
1004
            GLib.source_remove(self.disable_initiator_tag)
576
1005
            self.disable_initiator_tag = None
577
1006
        self.expires = None
578
 
        if getattr(self, "checker_initiator_tag", False):
579
 
            gobject.source_remove(self.checker_initiator_tag)
 
1007
        if getattr(self, "checker_initiator_tag", None) is not None:
 
1008
            GLib.source_remove(self.checker_initiator_tag)
580
1009
            self.checker_initiator_tag = None
581
1010
        self.stop_checker()
582
1011
        self.enabled = False
583
 
        # Do not run this again if called by a gobject.timeout_add
 
1012
        if not quiet:
 
1013
            self.send_changedstate()
 
1014
        # Do not run this again if called by a GLib.timeout_add
584
1015
        return False
585
 
    
 
1016
 
586
1017
    def __del__(self):
587
1018
        self.disable()
588
 
    
 
1019
 
589
1020
    def init_checker(self):
590
1021
        # Schedule a new checker to be started an 'interval' from now,
591
1022
        # and every interval from then on.
592
 
        self.checker_initiator_tag = (gobject.timeout_add
593
 
                                      (self.interval_milliseconds(),
594
 
                                       self.start_checker))
 
1023
        if self.checker_initiator_tag is not None:
 
1024
            GLib.source_remove(self.checker_initiator_tag)
 
1025
        self.checker_initiator_tag = GLib.timeout_add(
 
1026
            int(self.interval.total_seconds() * 1000),
 
1027
            self.start_checker)
595
1028
        # Schedule a disable() when 'timeout' has passed
596
 
        self.disable_initiator_tag = (gobject.timeout_add
597
 
                                   (self.timeout_milliseconds(),
598
 
                                    self.disable))
 
1029
        if self.disable_initiator_tag is not None:
 
1030
            GLib.source_remove(self.disable_initiator_tag)
 
1031
        self.disable_initiator_tag = GLib.timeout_add(
 
1032
            int(self.timeout.total_seconds() * 1000), self.disable)
599
1033
        # Also start a new checker *right now*.
600
1034
        self.start_checker()
601
 
    
602
 
    def checker_callback(self, pid, condition, command):
 
1035
 
 
1036
    def checker_callback(self, source, condition, connection,
 
1037
                         command):
603
1038
        """The checker has completed, so take appropriate actions."""
604
1039
        self.checker_callback_tag = None
605
1040
        self.checker = None
606
 
        if os.WIFEXITED(condition):
607
 
            self.last_checker_status = os.WEXITSTATUS(condition)
 
1041
        # Read return code from connection (see call_pipe)
 
1042
        returncode = connection.recv()
 
1043
        connection.close()
 
1044
 
 
1045
        if returncode >= 0:
 
1046
            self.last_checker_status = returncode
 
1047
            self.last_checker_signal = None
608
1048
            if self.last_checker_status == 0:
609
1049
                logger.info("Checker for %(name)s succeeded",
610
1050
                            vars(self))
611
1051
                self.checked_ok()
612
1052
            else:
613
 
                logger.info("Checker for %(name)s failed",
614
 
                            vars(self))
 
1053
                logger.info("Checker for %(name)s failed", vars(self))
615
1054
        else:
616
1055
            self.last_checker_status = -1
 
1056
            self.last_checker_signal = -returncode
617
1057
            logger.warning("Checker for %(name)s crashed?",
618
1058
                           vars(self))
619
 
    
620
 
    def checked_ok(self, timeout=None):
621
 
        """Bump up the timeout for this client.
622
 
        
623
 
        This should only be called when the client has been seen,
624
 
        alive and well.
625
 
        """
 
1059
        return False
 
1060
 
 
1061
    def checked_ok(self):
 
1062
        """Assert that the client has been seen, alive and well."""
 
1063
        self.last_checked_ok = datetime.datetime.utcnow()
 
1064
        self.last_checker_status = 0
 
1065
        self.last_checker_signal = None
 
1066
        self.bump_timeout()
 
1067
 
 
1068
    def bump_timeout(self, timeout=None):
 
1069
        """Bump up the timeout for this client."""
626
1070
        if timeout is None:
627
1071
            timeout = self.timeout
628
 
        self.last_checked_ok = datetime.datetime.utcnow()
629
1072
        if self.disable_initiator_tag is not None:
630
 
            gobject.source_remove(self.disable_initiator_tag)
 
1073
            GLib.source_remove(self.disable_initiator_tag)
 
1074
            self.disable_initiator_tag = None
631
1075
        if getattr(self, "enabled", False):
632
 
            self.disable_initiator_tag = (gobject.timeout_add
633
 
                                          (timedelta_to_milliseconds
634
 
                                           (timeout), self.disable))
 
1076
            self.disable_initiator_tag = GLib.timeout_add(
 
1077
                int(timeout.total_seconds() * 1000), self.disable)
635
1078
            self.expires = datetime.datetime.utcnow() + timeout
636
 
    
 
1079
 
637
1080
    def need_approval(self):
638
1081
        self.last_approval_request = datetime.datetime.utcnow()
639
 
    
 
1082
 
640
1083
    def start_checker(self):
641
1084
        """Start a new checker subprocess if one is not running.
642
 
        
 
1085
 
643
1086
        If a checker already exists, leave it running and do
644
1087
        nothing."""
645
1088
        # The reason for not killing a running checker is that if we
646
 
        # did that, then if a checker (for some reason) started
647
 
        # running slowly and taking more than 'interval' time, the
648
 
        # client would inevitably timeout, since no checker would get
649
 
        # a chance to run to completion.  If we instead leave running
 
1089
        # did that, and if a checker (for some reason) started running
 
1090
        # slowly and taking more than 'interval' time, then the client
 
1091
        # would inevitably timeout, since no checker would get a
 
1092
        # chance to run to completion.  If we instead leave running
650
1093
        # checkers alone, the checker would have to take more time
651
1094
        # than 'timeout' for the client to be disabled, which is as it
652
1095
        # should be.
653
 
        
654
 
        # If a checker exists, make sure it is not a zombie
655
 
        try:
656
 
            pid, status = os.waitpid(self.checker.pid, os.WNOHANG)
657
 
        except (AttributeError, OSError) as error:
658
 
            if (isinstance(error, OSError)
659
 
                and error.errno != errno.ECHILD):
660
 
                raise error
661
 
        else:
662
 
            if pid:
663
 
                logger.warning("Checker was a zombie")
664
 
                gobject.source_remove(self.checker_callback_tag)
665
 
                self.checker_callback(pid, status,
666
 
                                      self.current_checker_command)
 
1096
 
 
1097
        if self.checker is not None and not self.checker.is_alive():
 
1098
            logger.warning("Checker was not alive; joining")
 
1099
            self.checker.join()
 
1100
            self.checker = None
667
1101
        # Start a new checker if needed
668
1102
        if self.checker is None:
 
1103
            # Escape attributes for the shell
 
1104
            escaped_attrs = {
 
1105
                attr: re.escape(str(getattr(self, attr)))
 
1106
                for attr in self.runtime_expansions}
669
1107
            try:
670
 
                # In case checker_command has exactly one % operator
671
 
                command = self.checker_command % self.host
672
 
            except TypeError:
673
 
                # Escape attributes for the shell
674
 
                escaped_attrs = dict(
675
 
                    (attr,
676
 
                     re.escape(unicode(str(getattr(self, attr, "")),
677
 
                                       errors=
678
 
                                       'replace')))
679
 
                    for attr in
680
 
                    self.runtime_expansions)
681
 
                
682
 
                try:
683
 
                    command = self.checker_command % escaped_attrs
684
 
                except TypeError as error:
685
 
                    logger.error('Could not format string "%s":'
686
 
                                 ' %s', self.checker_command, error)
687
 
                    return True # Try again later
 
1108
                command = self.checker_command % escaped_attrs
 
1109
            except TypeError as error:
 
1110
                logger.error('Could not format string "%s"',
 
1111
                             self.checker_command,
 
1112
                             exc_info=error)
 
1113
                return True     # Try again later
688
1114
            self.current_checker_command = command
689
 
            try:
690
 
                logger.info("Starting checker %r for %s",
691
 
                            command, self.name)
692
 
                # We don't need to redirect stdout and stderr, since
693
 
                # in normal mode, that is already done by daemon(),
694
 
                # and in debug mode we don't want to.  (Stdin is
695
 
                # always replaced by /dev/null.)
696
 
                self.checker = subprocess.Popen(command,
697
 
                                                close_fds=True,
698
 
                                                shell=True, cwd="/")
699
 
                self.checker_callback_tag = (gobject.child_watch_add
700
 
                                             (self.checker.pid,
701
 
                                              self.checker_callback,
702
 
                                              data=command))
703
 
                # The checker may have completed before the gobject
704
 
                # watch was added.  Check for this.
705
 
                pid, status = os.waitpid(self.checker.pid, os.WNOHANG)
706
 
                if pid:
707
 
                    gobject.source_remove(self.checker_callback_tag)
708
 
                    self.checker_callback(pid, status, command)
709
 
            except OSError as error:
710
 
                logger.error("Failed to start subprocess: %s",
711
 
                             error)
712
 
        # Re-run this periodically if run by gobject.timeout_add
 
1115
            logger.info("Starting checker %r for %s", command,
 
1116
                        self.name)
 
1117
            # We don't need to redirect stdout and stderr, since
 
1118
            # in normal mode, that is already done by daemon(),
 
1119
            # and in debug mode we don't want to.  (Stdin is
 
1120
            # always replaced by /dev/null.)
 
1121
            # The exception is when not debugging but nevertheless
 
1122
            # running in the foreground; use the previously
 
1123
            # created wnull.
 
1124
            popen_args = {"close_fds": True,
 
1125
                          "shell": True,
 
1126
                          "cwd": "/"}
 
1127
            if (not self.server_settings["debug"]
 
1128
                and self.server_settings["foreground"]):
 
1129
                popen_args.update({"stdout": wnull,
 
1130
                                   "stderr": wnull})
 
1131
            pipe = multiprocessing.Pipe(duplex=False)
 
1132
            self.checker = multiprocessing.Process(
 
1133
                target=call_pipe,
 
1134
                args=(pipe[1], subprocess.call, command),
 
1135
                kwargs=popen_args)
 
1136
            self.checker.start()
 
1137
            self.checker_callback_tag = GLib.io_add_watch(
 
1138
                pipe[0].fileno(), GLib.IO_IN,
 
1139
                self.checker_callback, pipe[0], command)
 
1140
        # Re-run this periodically if run by GLib.timeout_add
713
1141
        return True
714
 
    
 
1142
 
715
1143
    def stop_checker(self):
716
1144
        """Force the checker process, if any, to stop."""
717
1145
        if self.checker_callback_tag:
718
 
            gobject.source_remove(self.checker_callback_tag)
 
1146
            GLib.source_remove(self.checker_callback_tag)
719
1147
            self.checker_callback_tag = None
720
1148
        if getattr(self, "checker", None) is None:
721
1149
            return
722
1150
        logger.debug("Stopping checker for %(name)s", vars(self))
723
 
        try:
724
 
            os.kill(self.checker.pid, signal.SIGTERM)
725
 
            #time.sleep(0.5)
726
 
            #if self.checker.poll() is None:
727
 
            #    os.kill(self.checker.pid, signal.SIGKILL)
728
 
        except OSError as error:
729
 
            if error.errno != errno.ESRCH: # No such process
730
 
                raise
 
1151
        self.checker.terminate()
731
1152
        self.checker = None
732
1153
 
733
1154
 
734
 
def dbus_service_property(dbus_interface, signature="v",
735
 
                          access="readwrite", byte_arrays=False):
 
1155
def dbus_service_property(dbus_interface,
 
1156
                          signature="v",
 
1157
                          access="readwrite",
 
1158
                          byte_arrays=False):
736
1159
    """Decorators for marking methods of a DBusObjectWithProperties to
737
1160
    become properties on the D-Bus.
738
 
    
 
1161
 
739
1162
    The decorated method will be called with no arguments by "Get"
740
1163
    and with one argument by "Set".
741
 
    
 
1164
 
742
1165
    The parameters, where they are supported, are the same as
743
1166
    dbus.service.method, except there is only "signature", since the
744
1167
    type from Get() and the type sent to Set() is the same.
747
1170
    # "Set" method, so we fail early here:
748
1171
    if byte_arrays and signature != "ay":
749
1172
        raise ValueError("Byte arrays not supported for non-'ay'"
750
 
                         " signature %r" % signature)
 
1173
                         " signature {!r}".format(signature))
 
1174
 
751
1175
    def decorator(func):
752
1176
        func._dbus_is_property = True
753
1177
        func._dbus_interface = dbus_interface
756
1180
        func._dbus_name = func.__name__
757
1181
        if func._dbus_name.endswith("_dbus_property"):
758
1182
            func._dbus_name = func._dbus_name[:-14]
759
 
        func._dbus_get_args_options = {'byte_arrays': byte_arrays }
760
 
        return func
 
1183
        func._dbus_get_args_options = {'byte_arrays': byte_arrays}
 
1184
        return func
 
1185
 
 
1186
    return decorator
 
1187
 
 
1188
 
 
1189
def dbus_interface_annotations(dbus_interface):
 
1190
    """Decorator for marking functions returning interface annotations
 
1191
 
 
1192
    Usage:
 
1193
 
 
1194
    @dbus_interface_annotations("org.example.Interface")
 
1195
    def _foo(self):  # Function name does not matter
 
1196
        return {"org.freedesktop.DBus.Deprecated": "true",
 
1197
                "org.freedesktop.DBus.Property.EmitsChangedSignal":
 
1198
                    "false"}
 
1199
    """
 
1200
 
 
1201
    def decorator(func):
 
1202
        func._dbus_is_interface = True
 
1203
        func._dbus_interface = dbus_interface
 
1204
        func._dbus_name = dbus_interface
 
1205
        return func
 
1206
 
 
1207
    return decorator
 
1208
 
 
1209
 
 
1210
def dbus_annotations(annotations):
 
1211
    """Decorator to annotate D-Bus methods, signals or properties
 
1212
    Usage:
 
1213
 
 
1214
    @dbus_annotations({"org.freedesktop.DBus.Deprecated": "true",
 
1215
                       "org.freedesktop.DBus.Property."
 
1216
                       "EmitsChangedSignal": "false"})
 
1217
    @dbus_service_property("org.example.Interface", signature="b",
 
1218
                           access="r")
 
1219
    def Property_dbus_property(self):
 
1220
        return dbus.Boolean(False)
 
1221
 
 
1222
    See also the DBusObjectWithAnnotations class.
 
1223
    """
 
1224
 
 
1225
    def decorator(func):
 
1226
        func._dbus_annotations = annotations
 
1227
        return func
 
1228
 
761
1229
    return decorator
762
1230
 
763
1231
 
764
1232
class DBusPropertyException(dbus.exceptions.DBusException):
765
1233
    """A base class for D-Bus property-related exceptions
766
1234
    """
767
 
    def __unicode__(self):
768
 
        return unicode(str(self))
 
1235
    pass
769
1236
 
770
1237
 
771
1238
class DBusPropertyAccessException(DBusPropertyException):
780
1247
    pass
781
1248
 
782
1249
 
783
 
class DBusObjectWithProperties(dbus.service.Object):
 
1250
class DBusObjectWithAnnotations(dbus.service.Object):
 
1251
    """A D-Bus object with annotations.
 
1252
 
 
1253
    Classes inheriting from this can use the dbus_annotations
 
1254
    decorator to add annotations to methods or signals.
 
1255
    """
 
1256
 
 
1257
    @staticmethod
 
1258
    def _is_dbus_thing(thing):
 
1259
        """Returns a function testing if an attribute is a D-Bus thing
 
1260
 
 
1261
        If called like _is_dbus_thing("method") it returns a function
 
1262
        suitable for use as predicate to inspect.getmembers().
 
1263
        """
 
1264
        return lambda obj: getattr(obj, "_dbus_is_{}".format(thing),
 
1265
                                   False)
 
1266
 
 
1267
    def _get_all_dbus_things(self, thing):
 
1268
        """Returns a generator of (name, attribute) pairs
 
1269
        """
 
1270
        return ((getattr(athing.__get__(self), "_dbus_name", name),
 
1271
                 athing.__get__(self))
 
1272
                for cls in self.__class__.__mro__
 
1273
                for name, athing in
 
1274
                inspect.getmembers(cls, self._is_dbus_thing(thing)))
 
1275
 
 
1276
    @dbus.service.method(dbus.INTROSPECTABLE_IFACE,
 
1277
                         out_signature="s",
 
1278
                         path_keyword='object_path',
 
1279
                         connection_keyword='connection')
 
1280
    def Introspect(self, object_path, connection):
 
1281
        """Overloading of standard D-Bus method.
 
1282
 
 
1283
        Inserts annotation tags on methods and signals.
 
1284
        """
 
1285
        xmlstring = dbus.service.Object.Introspect(self, object_path,
 
1286
                                                   connection)
 
1287
        try:
 
1288
            document = xml.dom.minidom.parseString(xmlstring)
 
1289
 
 
1290
            for if_tag in document.getElementsByTagName("interface"):
 
1291
                # Add annotation tags
 
1292
                for typ in ("method", "signal"):
 
1293
                    for tag in if_tag.getElementsByTagName(typ):
 
1294
                        annots = dict()
 
1295
                        for name, prop in (self.
 
1296
                                           _get_all_dbus_things(typ)):
 
1297
                            if (name == tag.getAttribute("name")
 
1298
                                and prop._dbus_interface
 
1299
                                == if_tag.getAttribute("name")):
 
1300
                                annots.update(getattr(
 
1301
                                    prop, "_dbus_annotations", {}))
 
1302
                        for name, value in annots.items():
 
1303
                            ann_tag = document.createElement(
 
1304
                                "annotation")
 
1305
                            ann_tag.setAttribute("name", name)
 
1306
                            ann_tag.setAttribute("value", value)
 
1307
                            tag.appendChild(ann_tag)
 
1308
                # Add interface annotation tags
 
1309
                for annotation, value in dict(
 
1310
                    itertools.chain.from_iterable(
 
1311
                        annotations().items()
 
1312
                        for name, annotations
 
1313
                        in self._get_all_dbus_things("interface")
 
1314
                        if name == if_tag.getAttribute("name")
 
1315
                        )).items():
 
1316
                    ann_tag = document.createElement("annotation")
 
1317
                    ann_tag.setAttribute("name", annotation)
 
1318
                    ann_tag.setAttribute("value", value)
 
1319
                    if_tag.appendChild(ann_tag)
 
1320
                # Fix argument name for the Introspect method itself
 
1321
                if (if_tag.getAttribute("name")
 
1322
                    == dbus.INTROSPECTABLE_IFACE):
 
1323
                    for cn in if_tag.getElementsByTagName("method"):
 
1324
                        if cn.getAttribute("name") == "Introspect":
 
1325
                            for arg in cn.getElementsByTagName("arg"):
 
1326
                                if (arg.getAttribute("direction")
 
1327
                                    == "out"):
 
1328
                                    arg.setAttribute("name",
 
1329
                                                     "xml_data")
 
1330
            xmlstring = document.toxml("utf-8")
 
1331
            document.unlink()
 
1332
        except (AttributeError, xml.dom.DOMException,
 
1333
                xml.parsers.expat.ExpatError) as error:
 
1334
            logger.error("Failed to override Introspection method",
 
1335
                         exc_info=error)
 
1336
        return xmlstring
 
1337
 
 
1338
 
 
1339
class DBusObjectWithProperties(DBusObjectWithAnnotations):
784
1340
    """A D-Bus object with properties.
785
 
    
 
1341
 
786
1342
    Classes inheriting from this can use the dbus_service_property
787
1343
    decorator to expose methods as D-Bus properties.  It exposes the
788
1344
    standard Get(), Set(), and GetAll() methods on the D-Bus.
789
1345
    """
790
 
    
791
 
    @staticmethod
792
 
    def _is_dbus_property(obj):
793
 
        return getattr(obj, "_dbus_is_property", False)
794
 
    
795
 
    def _get_all_dbus_properties(self):
796
 
        """Returns a generator of (name, attribute) pairs
797
 
        """
798
 
        return ((prop.__get__(self)._dbus_name, prop.__get__(self))
799
 
                for cls in self.__class__.__mro__
800
 
                for name, prop in
801
 
                inspect.getmembers(cls, self._is_dbus_property))
802
 
    
 
1346
 
803
1347
    def _get_dbus_property(self, interface_name, property_name):
804
1348
        """Returns a bound method if one exists which is a D-Bus
805
1349
        property with the specified name and interface.
806
1350
        """
807
 
        for cls in  self.__class__.__mro__:
808
 
            for name, value in (inspect.getmembers
809
 
                                (cls, self._is_dbus_property)):
 
1351
        for cls in self.__class__.__mro__:
 
1352
            for name, value in inspect.getmembers(
 
1353
                    cls, self._is_dbus_thing("property")):
810
1354
                if (value._dbus_name == property_name
811
1355
                    and value._dbus_interface == interface_name):
812
1356
                    return value.__get__(self)
813
 
        
 
1357
 
814
1358
        # No such property
815
 
        raise DBusPropertyNotFound(self.dbus_object_path + ":"
816
 
                                   + interface_name + "."
817
 
                                   + property_name)
818
 
    
819
 
    @dbus.service.method(dbus.PROPERTIES_IFACE, in_signature="ss",
 
1359
        raise DBusPropertyNotFound("{}:{}.{}".format(
 
1360
            self.dbus_object_path, interface_name, property_name))
 
1361
 
 
1362
    @classmethod
 
1363
    def _get_all_interface_names(cls):
 
1364
        """Get a sequence of all interfaces supported by an object"""
 
1365
        return (name for name in set(getattr(getattr(x, attr),
 
1366
                                             "_dbus_interface", None)
 
1367
                                     for x in (inspect.getmro(cls))
 
1368
                                     for attr in dir(x))
 
1369
                if name is not None)
 
1370
 
 
1371
    @dbus.service.method(dbus.PROPERTIES_IFACE,
 
1372
                         in_signature="ss",
820
1373
                         out_signature="v")
821
1374
    def Get(self, interface_name, property_name):
822
1375
        """Standard D-Bus property Get() method, see D-Bus standard.
828
1381
        if not hasattr(value, "variant_level"):
829
1382
            return value
830
1383
        return type(value)(value, variant_level=value.variant_level+1)
831
 
    
 
1384
 
832
1385
    @dbus.service.method(dbus.PROPERTIES_IFACE, in_signature="ssv")
833
1386
    def Set(self, interface_name, property_name, value):
834
1387
        """Standard D-Bus property Set() method, see D-Bus standard.
840
1393
            # The byte_arrays option is not supported yet on
841
1394
            # signatures other than "ay".
842
1395
            if prop._dbus_signature != "ay":
843
 
                raise ValueError
844
 
            value = dbus.ByteArray(''.join(unichr(byte)
845
 
                                           for byte in value))
 
1396
                raise ValueError("Byte arrays not supported for non-"
 
1397
                                 "'ay' signature {!r}"
 
1398
                                 .format(prop._dbus_signature))
 
1399
            value = dbus.ByteArray(b''.join(chr(byte)
 
1400
                                            for byte in value))
846
1401
        prop(value)
847
 
    
848
 
    @dbus.service.method(dbus.PROPERTIES_IFACE, in_signature="s",
 
1402
 
 
1403
    @dbus.service.method(dbus.PROPERTIES_IFACE,
 
1404
                         in_signature="s",
849
1405
                         out_signature="a{sv}")
850
1406
    def GetAll(self, interface_name):
851
1407
        """Standard D-Bus property GetAll() method, see D-Bus
852
1408
        standard.
853
 
        
 
1409
 
854
1410
        Note: Will not include properties with access="write".
855
1411
        """
856
1412
        properties = {}
857
 
        for name, prop in self._get_all_dbus_properties():
 
1413
        for name, prop in self._get_all_dbus_things("property"):
858
1414
            if (interface_name
859
1415
                and interface_name != prop._dbus_interface):
860
1416
                # Interface non-empty but did not match
866
1422
            if not hasattr(value, "variant_level"):
867
1423
                properties[name] = value
868
1424
                continue
869
 
            properties[name] = type(value)(value, variant_level=
870
 
                                           value.variant_level+1)
 
1425
            properties[name] = type(value)(
 
1426
                value, variant_level=value.variant_level + 1)
871
1427
        return dbus.Dictionary(properties, signature="sv")
872
 
    
 
1428
 
 
1429
    @dbus.service.signal(dbus.PROPERTIES_IFACE, signature="sa{sv}as")
 
1430
    def PropertiesChanged(self, interface_name, changed_properties,
 
1431
                          invalidated_properties):
 
1432
        """Standard D-Bus PropertiesChanged() signal, see D-Bus
 
1433
        standard.
 
1434
        """
 
1435
        pass
 
1436
 
873
1437
    @dbus.service.method(dbus.INTROSPECTABLE_IFACE,
874
1438
                         out_signature="s",
875
1439
                         path_keyword='object_path',
876
1440
                         connection_keyword='connection')
877
1441
    def Introspect(self, object_path, connection):
878
 
        """Standard D-Bus method, overloaded to insert property tags.
 
1442
        """Overloading of standard D-Bus method.
 
1443
 
 
1444
        Inserts property tags and interface annotation tags.
879
1445
        """
880
 
        xmlstring = dbus.service.Object.Introspect(self, object_path,
881
 
                                                   connection)
 
1446
        xmlstring = DBusObjectWithAnnotations.Introspect(self,
 
1447
                                                         object_path,
 
1448
                                                         connection)
882
1449
        try:
883
1450
            document = xml.dom.minidom.parseString(xmlstring)
 
1451
 
884
1452
            def make_tag(document, name, prop):
885
1453
                e = document.createElement("property")
886
1454
                e.setAttribute("name", name)
887
1455
                e.setAttribute("type", prop._dbus_signature)
888
1456
                e.setAttribute("access", prop._dbus_access)
889
1457
                return e
 
1458
 
890
1459
            for if_tag in document.getElementsByTagName("interface"):
 
1460
                # Add property tags
891
1461
                for tag in (make_tag(document, name, prop)
892
1462
                            for name, prop
893
 
                            in self._get_all_dbus_properties()
 
1463
                            in self._get_all_dbus_things("property")
894
1464
                            if prop._dbus_interface
895
1465
                            == if_tag.getAttribute("name")):
896
1466
                    if_tag.appendChild(tag)
 
1467
                # Add annotation tags for properties
 
1468
                for tag in if_tag.getElementsByTagName("property"):
 
1469
                    annots = dict()
 
1470
                    for name, prop in self._get_all_dbus_things(
 
1471
                            "property"):
 
1472
                        if (name == tag.getAttribute("name")
 
1473
                            and prop._dbus_interface
 
1474
                            == if_tag.getAttribute("name")):
 
1475
                            annots.update(getattr(
 
1476
                                prop, "_dbus_annotations", {}))
 
1477
                    for name, value in annots.items():
 
1478
                        ann_tag = document.createElement(
 
1479
                            "annotation")
 
1480
                        ann_tag.setAttribute("name", name)
 
1481
                        ann_tag.setAttribute("value", value)
 
1482
                        tag.appendChild(ann_tag)
897
1483
                # Add the names to the return values for the
898
1484
                # "org.freedesktop.DBus.Properties" methods
899
1485
                if (if_tag.getAttribute("name")
914
1500
        except (AttributeError, xml.dom.DOMException,
915
1501
                xml.parsers.expat.ExpatError) as error:
916
1502
            logger.error("Failed to override Introspection method",
917
 
                         error)
918
 
        return xmlstring
919
 
 
920
 
 
921
 
def datetime_to_dbus (dt, variant_level=0):
 
1503
                         exc_info=error)
 
1504
        return xmlstring
 
1505
 
 
1506
 
 
1507
try:
 
1508
    dbus.OBJECT_MANAGER_IFACE
 
1509
except AttributeError:
 
1510
    dbus.OBJECT_MANAGER_IFACE = "org.freedesktop.DBus.ObjectManager"
 
1511
 
 
1512
 
 
1513
class DBusObjectWithObjectManager(DBusObjectWithAnnotations):
 
1514
    """A D-Bus object with an ObjectManager.
 
1515
 
 
1516
    Classes inheriting from this exposes the standard
 
1517
    GetManagedObjects call and the InterfacesAdded and
 
1518
    InterfacesRemoved signals on the standard
 
1519
    "org.freedesktop.DBus.ObjectManager" interface.
 
1520
 
 
1521
    Note: No signals are sent automatically; they must be sent
 
1522
    manually.
 
1523
    """
 
1524
    @dbus.service.method(dbus.OBJECT_MANAGER_IFACE,
 
1525
                         out_signature="a{oa{sa{sv}}}")
 
1526
    def GetManagedObjects(self):
 
1527
        """This function must be overridden"""
 
1528
        raise NotImplementedError()
 
1529
 
 
1530
    @dbus.service.signal(dbus.OBJECT_MANAGER_IFACE,
 
1531
                         signature="oa{sa{sv}}")
 
1532
    def InterfacesAdded(self, object_path, interfaces_and_properties):
 
1533
        pass
 
1534
 
 
1535
    @dbus.service.signal(dbus.OBJECT_MANAGER_IFACE, signature="oas")
 
1536
    def InterfacesRemoved(self, object_path, interfaces):
 
1537
        pass
 
1538
 
 
1539
    @dbus.service.method(dbus.INTROSPECTABLE_IFACE,
 
1540
                         out_signature="s",
 
1541
                         path_keyword='object_path',
 
1542
                         connection_keyword='connection')
 
1543
    def Introspect(self, object_path, connection):
 
1544
        """Overloading of standard D-Bus method.
 
1545
 
 
1546
        Override return argument name of GetManagedObjects to be
 
1547
        "objpath_interfaces_and_properties"
 
1548
        """
 
1549
        xmlstring = DBusObjectWithAnnotations.Introspect(self,
 
1550
                                                         object_path,
 
1551
                                                         connection)
 
1552
        try:
 
1553
            document = xml.dom.minidom.parseString(xmlstring)
 
1554
 
 
1555
            for if_tag in document.getElementsByTagName("interface"):
 
1556
                # Fix argument name for the GetManagedObjects method
 
1557
                if (if_tag.getAttribute("name")
 
1558
                    == dbus.OBJECT_MANAGER_IFACE):
 
1559
                    for cn in if_tag.getElementsByTagName("method"):
 
1560
                        if (cn.getAttribute("name")
 
1561
                            == "GetManagedObjects"):
 
1562
                            for arg in cn.getElementsByTagName("arg"):
 
1563
                                if (arg.getAttribute("direction")
 
1564
                                    == "out"):
 
1565
                                    arg.setAttribute(
 
1566
                                        "name",
 
1567
                                        "objpath_interfaces"
 
1568
                                        "_and_properties")
 
1569
            xmlstring = document.toxml("utf-8")
 
1570
            document.unlink()
 
1571
        except (AttributeError, xml.dom.DOMException,
 
1572
                xml.parsers.expat.ExpatError) as error:
 
1573
            logger.error("Failed to override Introspection method",
 
1574
                         exc_info=error)
 
1575
        return xmlstring
 
1576
 
 
1577
 
 
1578
def datetime_to_dbus(dt, variant_level=0):
922
1579
    """Convert a UTC datetime.datetime() to a D-Bus type."""
923
1580
    if dt is None:
924
 
        return dbus.String("", variant_level = variant_level)
925
 
    return dbus.String(dt.isoformat(),
926
 
                       variant_level=variant_level)
927
 
 
928
 
 
929
 
class AlternateDBusNamesMetaclass(DBusObjectWithProperties
930
 
                                  .__metaclass__):
931
 
    """Applied to an empty subclass of a D-Bus object, this metaclass
932
 
    will add additional D-Bus attributes matching a certain pattern.
 
1581
        return dbus.String("", variant_level=variant_level)
 
1582
    return dbus.String(dt.isoformat(), variant_level=variant_level)
 
1583
 
 
1584
 
 
1585
def alternate_dbus_interfaces(alt_interface_names, deprecate=True):
 
1586
    """A class decorator; applied to a subclass of
 
1587
    dbus.service.Object, it will add alternate D-Bus attributes with
 
1588
    interface names according to the "alt_interface_names" mapping.
 
1589
    Usage:
 
1590
 
 
1591
    @alternate_dbus_interfaces({"org.example.Interface":
 
1592
                                    "net.example.AlternateInterface"})
 
1593
    class SampleDBusObject(dbus.service.Object):
 
1594
        @dbus.service.method("org.example.Interface")
 
1595
        def SampleDBusMethod():
 
1596
            pass
 
1597
 
 
1598
    The above "SampleDBusMethod" on "SampleDBusObject" will be
 
1599
    reachable via two interfaces: "org.example.Interface" and
 
1600
    "net.example.AlternateInterface", the latter of which will have
 
1601
    its D-Bus annotation "org.freedesktop.DBus.Deprecated" set to
 
1602
    "true", unless "deprecate" is passed with a False value.
 
1603
 
 
1604
    This works for methods and signals, and also for D-Bus properties
 
1605
    (from DBusObjectWithProperties) and interfaces (from the
 
1606
    dbus_interface_annotations decorator).
933
1607
    """
934
 
    def __new__(mcs, name, bases, attr):
935
 
        # Go through all the base classes which could have D-Bus
936
 
        # methods, signals, or properties in them
937
 
        for base in (b for b in bases
938
 
                     if issubclass(b, dbus.service.Object)):
939
 
            # Go though all attributes of the base class
940
 
            for attrname, attribute in inspect.getmembers(base):
 
1608
 
 
1609
    def wrapper(cls):
 
1610
        for orig_interface_name, alt_interface_name in (
 
1611
                alt_interface_names.items()):
 
1612
            attr = {}
 
1613
            interface_names = set()
 
1614
            # Go though all attributes of the class
 
1615
            for attrname, attribute in inspect.getmembers(cls):
941
1616
                # Ignore non-D-Bus attributes, and D-Bus attributes
942
1617
                # with the wrong interface name
943
1618
                if (not hasattr(attribute, "_dbus_interface")
944
 
                    or not attribute._dbus_interface
945
 
                    .startswith("se.recompile.Mandos")):
 
1619
                    or not attribute._dbus_interface.startswith(
 
1620
                        orig_interface_name)):
946
1621
                    continue
947
1622
                # Create an alternate D-Bus interface name based on
948
1623
                # the current name
949
 
                alt_interface = (attribute._dbus_interface
950
 
                                 .replace("se.recompile.Mandos",
951
 
                                          "se.bsnet.fukt.Mandos"))
 
1624
                alt_interface = attribute._dbus_interface.replace(
 
1625
                    orig_interface_name, alt_interface_name)
 
1626
                interface_names.add(alt_interface)
952
1627
                # Is this a D-Bus signal?
953
1628
                if getattr(attribute, "_dbus_is_signal", False):
954
 
                    # Extract the original non-method function by
955
 
                    # black magic
956
 
                    nonmethod_func = (dict(
 
1629
                    # Extract the original non-method undecorated
 
1630
                    # function by black magic
 
1631
                    if sys.version_info.major == 2:
 
1632
                        nonmethod_func = (dict(
957
1633
                            zip(attribute.func_code.co_freevars,
958
 
                                attribute.__closure__))["func"]
959
 
                                      .cell_contents)
 
1634
                                attribute.__closure__))
 
1635
                                          ["func"].cell_contents)
 
1636
                    else:
 
1637
                        nonmethod_func = (dict(
 
1638
                            zip(attribute.__code__.co_freevars,
 
1639
                                attribute.__closure__))
 
1640
                                          ["func"].cell_contents)
960
1641
                    # Create a new, but exactly alike, function
961
1642
                    # object, and decorate it to be a new D-Bus signal
962
1643
                    # with the alternate D-Bus interface name
963
 
                    new_function = (dbus.service.signal
964
 
                                    (alt_interface,
965
 
                                     attribute._dbus_signature)
966
 
                                    (types.FunctionType(
967
 
                                nonmethod_func.func_code,
968
 
                                nonmethod_func.func_globals,
969
 
                                nonmethod_func.func_name,
970
 
                                nonmethod_func.func_defaults,
971
 
                                nonmethod_func.func_closure)))
 
1644
                    new_function = copy_function(nonmethod_func)
 
1645
                    new_function = (dbus.service.signal(
 
1646
                        alt_interface,
 
1647
                        attribute._dbus_signature)(new_function))
 
1648
                    # Copy annotations, if any
 
1649
                    try:
 
1650
                        new_function._dbus_annotations = dict(
 
1651
                            attribute._dbus_annotations)
 
1652
                    except AttributeError:
 
1653
                        pass
 
1654
 
972
1655
                    # Define a creator of a function to call both the
973
 
                    # old and new functions, so both the old and new
974
 
                    # signals gets sent when the function is called
 
1656
                    # original and alternate functions, so both the
 
1657
                    # original and alternate signals gets sent when
 
1658
                    # the function is called
975
1659
                    def fixscope(func1, func2):
976
1660
                        """This function is a scope container to pass
977
1661
                        func1 and func2 to the "call_both" function
978
1662
                        outside of its arguments"""
 
1663
 
 
1664
                        @functools.wraps(func2)
979
1665
                        def call_both(*args, **kwargs):
980
1666
                            """This function will emit two D-Bus
981
1667
                            signals by calling func1 and func2"""
982
1668
                            func1(*args, **kwargs)
983
1669
                            func2(*args, **kwargs)
 
1670
                        # Make wrapper function look like a D-Bus
 
1671
                        # signal
 
1672
                        for name, attr in inspect.getmembers(func2):
 
1673
                            if name.startswith("_dbus_"):
 
1674
                                setattr(call_both, name, attr)
 
1675
 
984
1676
                        return call_both
985
1677
                    # Create the "call_both" function and add it to
986
1678
                    # the class
987
 
                    attr[attrname] = fixscope(attribute,
988
 
                                              new_function)
 
1679
                    attr[attrname] = fixscope(attribute, new_function)
989
1680
                # Is this a D-Bus method?
990
1681
                elif getattr(attribute, "_dbus_is_method", False):
991
1682
                    # Create a new, but exactly alike, function
992
1683
                    # object.  Decorate it to be a new D-Bus method
993
1684
                    # with the alternate D-Bus interface name.  Add it
994
1685
                    # to the class.
995
 
                    attr[attrname] = (dbus.service.method
996
 
                                      (alt_interface,
997
 
                                       attribute._dbus_in_signature,
998
 
                                       attribute._dbus_out_signature)
999
 
                                      (types.FunctionType
1000
 
                                       (attribute.func_code,
1001
 
                                        attribute.func_globals,
1002
 
                                        attribute.func_name,
1003
 
                                        attribute.func_defaults,
1004
 
                                        attribute.func_closure)))
 
1686
                    attr[attrname] = (
 
1687
                        dbus.service.method(
 
1688
                            alt_interface,
 
1689
                            attribute._dbus_in_signature,
 
1690
                            attribute._dbus_out_signature)
 
1691
                        (copy_function(attribute)))
 
1692
                    # Copy annotations, if any
 
1693
                    try:
 
1694
                        attr[attrname]._dbus_annotations = dict(
 
1695
                            attribute._dbus_annotations)
 
1696
                    except AttributeError:
 
1697
                        pass
1005
1698
                # Is this a D-Bus property?
1006
1699
                elif getattr(attribute, "_dbus_is_property", False):
1007
1700
                    # Create a new, but exactly alike, function
1008
1701
                    # object, and decorate it to be a new D-Bus
1009
1702
                    # property with the alternate D-Bus interface
1010
1703
                    # name.  Add it to the class.
1011
 
                    attr[attrname] = (dbus_service_property
1012
 
                                      (alt_interface,
1013
 
                                       attribute._dbus_signature,
1014
 
                                       attribute._dbus_access,
1015
 
                                       attribute
1016
 
                                       ._dbus_get_args_options
1017
 
                                       ["byte_arrays"])
1018
 
                                      (types.FunctionType
1019
 
                                       (attribute.func_code,
1020
 
                                        attribute.func_globals,
1021
 
                                        attribute.func_name,
1022
 
                                        attribute.func_defaults,
1023
 
                                        attribute.func_closure)))
1024
 
        return type.__new__(mcs, name, bases, attr)
1025
 
 
1026
 
 
 
1704
                    attr[attrname] = (dbus_service_property(
 
1705
                        alt_interface, attribute._dbus_signature,
 
1706
                        attribute._dbus_access,
 
1707
                        attribute._dbus_get_args_options
 
1708
                        ["byte_arrays"])
 
1709
                                      (copy_function(attribute)))
 
1710
                    # Copy annotations, if any
 
1711
                    try:
 
1712
                        attr[attrname]._dbus_annotations = dict(
 
1713
                            attribute._dbus_annotations)
 
1714
                    except AttributeError:
 
1715
                        pass
 
1716
                # Is this a D-Bus interface?
 
1717
                elif getattr(attribute, "_dbus_is_interface", False):
 
1718
                    # Create a new, but exactly alike, function
 
1719
                    # object.  Decorate it to be a new D-Bus interface
 
1720
                    # with the alternate D-Bus interface name.  Add it
 
1721
                    # to the class.
 
1722
                    attr[attrname] = (
 
1723
                        dbus_interface_annotations(alt_interface)
 
1724
                        (copy_function(attribute)))
 
1725
            if deprecate:
 
1726
                # Deprecate all alternate interfaces
 
1727
                iname = "_AlternateDBusNames_interface_annotation{}"
 
1728
                for interface_name in interface_names:
 
1729
 
 
1730
                    @dbus_interface_annotations(interface_name)
 
1731
                    def func(self):
 
1732
                        return {"org.freedesktop.DBus.Deprecated":
 
1733
                                "true"}
 
1734
                    # Find an unused name
 
1735
                    for aname in (iname.format(i)
 
1736
                                  for i in itertools.count()):
 
1737
                        if aname not in attr:
 
1738
                            attr[aname] = func
 
1739
                            break
 
1740
            if interface_names:
 
1741
                # Replace the class with a new subclass of it with
 
1742
                # methods, signals, etc. as created above.
 
1743
                if sys.version_info.major == 2:
 
1744
                    cls = type(b"{}Alternate".format(cls.__name__),
 
1745
                               (cls, ), attr)
 
1746
                else:
 
1747
                    cls = type("{}Alternate".format(cls.__name__),
 
1748
                               (cls, ), attr)
 
1749
        return cls
 
1750
 
 
1751
    return wrapper
 
1752
 
 
1753
 
 
1754
@alternate_dbus_interfaces({"se.recompile.Mandos":
 
1755
                            "se.bsnet.fukt.Mandos"})
1027
1756
class ClientDBus(Client, DBusObjectWithProperties):
1028
1757
    """A Client class using D-Bus
1029
 
    
 
1758
 
1030
1759
    Attributes:
1031
1760
    dbus_object_path: dbus.ObjectPath
1032
1761
    bus: dbus.SystemBus()
1033
1762
    """
1034
 
    
 
1763
 
1035
1764
    runtime_expansions = (Client.runtime_expansions
1036
 
                          + ("dbus_object_path",))
1037
 
    
 
1765
                          + ("dbus_object_path", ))
 
1766
 
 
1767
    _interface = "se.recompile.Mandos.Client"
 
1768
 
1038
1769
    # dbus.service.Object doesn't use super(), so we can't either.
1039
 
    
1040
 
    def __init__(self, bus = None, *args, **kwargs):
 
1770
 
 
1771
    def __init__(self, bus=None, *args, **kwargs):
1041
1772
        self.bus = bus
1042
1773
        Client.__init__(self, *args, **kwargs)
1043
 
        self._approvals_pending = 0
1044
 
        
1045
 
        self._approvals_pending = 0
1046
1774
        # Only now, when this client is initialized, can it show up on
1047
1775
        # the D-Bus
1048
 
        client_object_name = unicode(self.name).translate(
 
1776
        client_object_name = str(self.name).translate(
1049
1777
            {ord("."): ord("_"),
1050
1778
             ord("-"): ord("_")})
1051
 
        self.dbus_object_path = (dbus.ObjectPath
1052
 
                                 ("/clients/" + client_object_name))
 
1779
        self.dbus_object_path = dbus.ObjectPath(
 
1780
            "/clients/" + client_object_name)
1053
1781
        DBusObjectWithProperties.__init__(self, self.bus,
1054
1782
                                          self.dbus_object_path)
1055
 
        
1056
 
    def notifychangeproperty(transform_func,
1057
 
                             dbus_name, type_func=lambda x: x,
1058
 
                             variant_level=1):
 
1783
 
 
1784
    def notifychangeproperty(transform_func, dbus_name,
 
1785
                             type_func=lambda x: x,
 
1786
                             variant_level=1,
 
1787
                             invalidate_only=False,
 
1788
                             _interface=_interface):
1059
1789
        """ Modify a variable so that it's a property which announces
1060
1790
        its changes to DBus.
1061
 
        
 
1791
 
1062
1792
        transform_fun: Function that takes a value and a variant_level
1063
1793
                       and transforms it to a D-Bus type.
1064
1794
        dbus_name: D-Bus name of the variable
1066
1796
                   to the D-Bus.  Default: no transform
1067
1797
        variant_level: D-Bus variant level.  Default: 1
1068
1798
        """
1069
 
        attrname = "_{0}".format(dbus_name)
 
1799
        attrname = "_{}".format(dbus_name)
 
1800
 
1070
1801
        def setter(self, value):
1071
1802
            if hasattr(self, "dbus_object_path"):
1072
1803
                if (not hasattr(self, attrname) or
1073
1804
                    type_func(getattr(self, attrname, None))
1074
1805
                    != type_func(value)):
1075
 
                    dbus_value = transform_func(type_func(value),
1076
 
                                                variant_level
1077
 
                                                =variant_level)
1078
 
                    self.PropertyChanged(dbus.String(dbus_name),
1079
 
                                         dbus_value)
 
1806
                    if invalidate_only:
 
1807
                        self.PropertiesChanged(
 
1808
                            _interface, dbus.Dictionary(),
 
1809
                            dbus.Array((dbus_name, )))
 
1810
                    else:
 
1811
                        dbus_value = transform_func(
 
1812
                            type_func(value),
 
1813
                            variant_level=variant_level)
 
1814
                        self.PropertyChanged(dbus.String(dbus_name),
 
1815
                                             dbus_value)
 
1816
                        self.PropertiesChanged(
 
1817
                            _interface,
 
1818
                            dbus.Dictionary({dbus.String(dbus_name):
 
1819
                                             dbus_value}),
 
1820
                            dbus.Array())
1080
1821
            setattr(self, attrname, value)
1081
 
        
 
1822
 
1082
1823
        return property(lambda self: getattr(self, attrname), setter)
1083
 
    
1084
 
    
 
1824
 
1085
1825
    expires = notifychangeproperty(datetime_to_dbus, "Expires")
1086
1826
    approvals_pending = notifychangeproperty(dbus.Boolean,
1087
1827
                                             "ApprovalPending",
1088
 
                                             type_func = bool)
 
1828
                                             type_func=bool)
1089
1829
    enabled = notifychangeproperty(dbus.Boolean, "Enabled")
1090
1830
    last_enabled = notifychangeproperty(datetime_to_dbus,
1091
1831
                                        "LastEnabled")
1092
 
    checker = notifychangeproperty(dbus.Boolean, "CheckerRunning",
1093
 
                                   type_func = lambda checker:
1094
 
                                       checker is not None)
 
1832
    checker = notifychangeproperty(
 
1833
        dbus.Boolean, "CheckerRunning",
 
1834
        type_func=lambda checker: checker is not None)
1095
1835
    last_checked_ok = notifychangeproperty(datetime_to_dbus,
1096
1836
                                           "LastCheckedOK")
 
1837
    last_checker_status = notifychangeproperty(dbus.Int16,
 
1838
                                               "LastCheckerStatus")
1097
1839
    last_approval_request = notifychangeproperty(
1098
1840
        datetime_to_dbus, "LastApprovalRequest")
1099
1841
    approved_by_default = notifychangeproperty(dbus.Boolean,
1100
1842
                                               "ApprovedByDefault")
1101
 
    approval_delay = notifychangeproperty(dbus.UInt64,
1102
 
                                          "ApprovalDelay",
1103
 
                                          type_func =
1104
 
                                          timedelta_to_milliseconds)
 
1843
    approval_delay = notifychangeproperty(
 
1844
        dbus.UInt64, "ApprovalDelay",
 
1845
        type_func=lambda td: td.total_seconds() * 1000)
1105
1846
    approval_duration = notifychangeproperty(
1106
1847
        dbus.UInt64, "ApprovalDuration",
1107
 
        type_func = timedelta_to_milliseconds)
 
1848
        type_func=lambda td: td.total_seconds() * 1000)
1108
1849
    host = notifychangeproperty(dbus.String, "Host")
1109
 
    timeout = notifychangeproperty(dbus.UInt64, "Timeout",
1110
 
                                   type_func =
1111
 
                                   timedelta_to_milliseconds)
 
1850
    timeout = notifychangeproperty(
 
1851
        dbus.UInt64, "Timeout",
 
1852
        type_func=lambda td: td.total_seconds() * 1000)
1112
1853
    extended_timeout = notifychangeproperty(
1113
1854
        dbus.UInt64, "ExtendedTimeout",
1114
 
        type_func = timedelta_to_milliseconds)
1115
 
    interval = notifychangeproperty(dbus.UInt64,
1116
 
                                    "Interval",
1117
 
                                    type_func =
1118
 
                                    timedelta_to_milliseconds)
 
1855
        type_func=lambda td: td.total_seconds() * 1000)
 
1856
    interval = notifychangeproperty(
 
1857
        dbus.UInt64, "Interval",
 
1858
        type_func=lambda td: td.total_seconds() * 1000)
1119
1859
    checker_command = notifychangeproperty(dbus.String, "Checker")
1120
 
    
 
1860
    secret = notifychangeproperty(dbus.ByteArray, "Secret",
 
1861
                                  invalidate_only=True)
 
1862
 
1121
1863
    del notifychangeproperty
1122
 
    
 
1864
 
1123
1865
    def __del__(self, *args, **kwargs):
1124
1866
        try:
1125
1867
            self.remove_from_connection()
1128
1870
        if hasattr(DBusObjectWithProperties, "__del__"):
1129
1871
            DBusObjectWithProperties.__del__(self, *args, **kwargs)
1130
1872
        Client.__del__(self, *args, **kwargs)
1131
 
    
1132
 
    def checker_callback(self, pid, condition, command,
1133
 
                         *args, **kwargs):
1134
 
        self.checker_callback_tag = None
1135
 
        self.checker = None
1136
 
        if os.WIFEXITED(condition):
1137
 
            exitstatus = os.WEXITSTATUS(condition)
 
1873
 
 
1874
    def checker_callback(self, source, condition,
 
1875
                         connection, command, *args, **kwargs):
 
1876
        ret = Client.checker_callback(self, source, condition,
 
1877
                                      connection, command, *args,
 
1878
                                      **kwargs)
 
1879
        exitstatus = self.last_checker_status
 
1880
        if exitstatus >= 0:
1138
1881
            # Emit D-Bus signal
1139
1882
            self.CheckerCompleted(dbus.Int16(exitstatus),
1140
 
                                  dbus.Int64(condition),
 
1883
                                  # This is specific to GNU libC
 
1884
                                  dbus.Int64(exitstatus << 8),
1141
1885
                                  dbus.String(command))
1142
1886
        else:
1143
1887
            # Emit D-Bus signal
1144
1888
            self.CheckerCompleted(dbus.Int16(-1),
1145
 
                                  dbus.Int64(condition),
 
1889
                                  dbus.Int64(
 
1890
                                      # This is specific to GNU libC
 
1891
                                      (exitstatus << 8)
 
1892
                                      | self.last_checker_signal),
1146
1893
                                  dbus.String(command))
1147
 
        
1148
 
        return Client.checker_callback(self, pid, condition, command,
1149
 
                                       *args, **kwargs)
1150
 
    
 
1894
        return ret
 
1895
 
1151
1896
    def start_checker(self, *args, **kwargs):
1152
 
        old_checker = self.checker
1153
 
        if self.checker is not None:
1154
 
            old_checker_pid = self.checker.pid
1155
 
        else:
1156
 
            old_checker_pid = None
 
1897
        old_checker_pid = getattr(self.checker, "pid", None)
1157
1898
        r = Client.start_checker(self, *args, **kwargs)
1158
1899
        # Only if new checker process was started
1159
1900
        if (self.checker is not None
1161
1902
            # Emit D-Bus signal
1162
1903
            self.CheckerStarted(self.current_checker_command)
1163
1904
        return r
1164
 
    
 
1905
 
1165
1906
    def _reset_approved(self):
1166
1907
        self.approved = None
1167
1908
        return False
1168
 
    
 
1909
 
1169
1910
    def approve(self, value=True):
1170
 
        self.send_changedstate()
1171
1911
        self.approved = value
1172
 
        gobject.timeout_add(timedelta_to_milliseconds
1173
 
                            (self.approval_duration),
1174
 
                            self._reset_approved)
1175
 
    
1176
 
    
1177
 
    ## D-Bus methods, signals & properties
1178
 
    _interface = "se.recompile.Mandos.Client"
1179
 
    
1180
 
    ## Signals
1181
 
    
 
1912
        GLib.timeout_add(int(self.approval_duration.total_seconds()
 
1913
                             * 1000), self._reset_approved)
 
1914
        self.send_changedstate()
 
1915
 
 
1916
    #  D-Bus methods, signals & properties
 
1917
 
 
1918
    #  Interfaces
 
1919
 
 
1920
    #  Signals
 
1921
 
1182
1922
    # CheckerCompleted - signal
1183
1923
    @dbus.service.signal(_interface, signature="nxs")
1184
1924
    def CheckerCompleted(self, exitcode, waitstatus, command):
1185
1925
        "D-Bus signal"
1186
1926
        pass
1187
 
    
 
1927
 
1188
1928
    # CheckerStarted - signal
1189
1929
    @dbus.service.signal(_interface, signature="s")
1190
1930
    def CheckerStarted(self, command):
1191
1931
        "D-Bus signal"
1192
1932
        pass
1193
 
    
 
1933
 
1194
1934
    # PropertyChanged - signal
 
1935
    @dbus_annotations({"org.freedesktop.DBus.Deprecated": "true"})
1195
1936
    @dbus.service.signal(_interface, signature="sv")
1196
1937
    def PropertyChanged(self, property, value):
1197
1938
        "D-Bus signal"
1198
1939
        pass
1199
 
    
 
1940
 
1200
1941
    # GotSecret - signal
1201
1942
    @dbus.service.signal(_interface)
1202
1943
    def GotSecret(self):
1205
1946
        server to mandos-client
1206
1947
        """
1207
1948
        pass
1208
 
    
 
1949
 
1209
1950
    # Rejected - signal
1210
1951
    @dbus.service.signal(_interface, signature="s")
1211
1952
    def Rejected(self, reason):
1212
1953
        "D-Bus signal"
1213
1954
        pass
1214
 
    
 
1955
 
1215
1956
    # NeedApproval - signal
1216
1957
    @dbus.service.signal(_interface, signature="tb")
1217
1958
    def NeedApproval(self, timeout, default):
1218
1959
        "D-Bus signal"
1219
1960
        return self.need_approval()
1220
 
    
1221
 
    # NeRwequest - signal
1222
 
    @dbus.service.signal(_interface, signature="s")
1223
 
    def NewRequest(self, ip):
1224
 
        """D-Bus signal
1225
 
        Is sent after a client request a password.
1226
 
        """
1227
 
        pass
1228
 
    
1229
 
    ## Methods
1230
 
    
 
1961
 
 
1962
    #  Methods
 
1963
 
1231
1964
    # Approve - method
1232
1965
    @dbus.service.method(_interface, in_signature="b")
1233
1966
    def Approve(self, value):
1234
1967
        self.approve(value)
1235
 
    
 
1968
 
1236
1969
    # CheckedOK - method
1237
1970
    @dbus.service.method(_interface)
1238
1971
    def CheckedOK(self):
1239
1972
        self.checked_ok()
1240
 
    
 
1973
 
1241
1974
    # Enable - method
 
1975
    @dbus_annotations({"org.freedesktop.DBus.Deprecated": "true"})
1242
1976
    @dbus.service.method(_interface)
1243
1977
    def Enable(self):
1244
1978
        "D-Bus method"
1245
1979
        self.enable()
1246
 
    
 
1980
 
1247
1981
    # StartChecker - method
 
1982
    @dbus_annotations({"org.freedesktop.DBus.Deprecated": "true"})
1248
1983
    @dbus.service.method(_interface)
1249
1984
    def StartChecker(self):
1250
1985
        "D-Bus method"
1251
1986
        self.start_checker()
1252
 
    
 
1987
 
1253
1988
    # Disable - method
 
1989
    @dbus_annotations({"org.freedesktop.DBus.Deprecated": "true"})
1254
1990
    @dbus.service.method(_interface)
1255
1991
    def Disable(self):
1256
1992
        "D-Bus method"
1257
1993
        self.disable()
1258
 
    
 
1994
 
1259
1995
    # StopChecker - method
 
1996
    @dbus_annotations({"org.freedesktop.DBus.Deprecated": "true"})
1260
1997
    @dbus.service.method(_interface)
1261
1998
    def StopChecker(self):
1262
1999
        self.stop_checker()
1263
 
    
1264
 
    ## Properties
1265
 
    
 
2000
 
 
2001
    #  Properties
 
2002
 
1266
2003
    # ApprovalPending - property
1267
2004
    @dbus_service_property(_interface, signature="b", access="read")
1268
2005
    def ApprovalPending_dbus_property(self):
1269
2006
        return dbus.Boolean(bool(self.approvals_pending))
1270
 
    
 
2007
 
1271
2008
    # ApprovedByDefault - property
1272
 
    @dbus_service_property(_interface, signature="b",
 
2009
    @dbus_service_property(_interface,
 
2010
                           signature="b",
1273
2011
                           access="readwrite")
1274
2012
    def ApprovedByDefault_dbus_property(self, value=None):
1275
2013
        if value is None:       # get
1276
2014
            return dbus.Boolean(self.approved_by_default)
1277
2015
        self.approved_by_default = bool(value)
1278
 
    
 
2016
 
1279
2017
    # ApprovalDelay - property
1280
 
    @dbus_service_property(_interface, signature="t",
 
2018
    @dbus_service_property(_interface,
 
2019
                           signature="t",
1281
2020
                           access="readwrite")
1282
2021
    def ApprovalDelay_dbus_property(self, value=None):
1283
2022
        if value is None:       # get
1284
 
            return dbus.UInt64(self.approval_delay_milliseconds())
 
2023
            return dbus.UInt64(self.approval_delay.total_seconds()
 
2024
                               * 1000)
1285
2025
        self.approval_delay = datetime.timedelta(0, 0, 0, value)
1286
 
    
 
2026
 
1287
2027
    # ApprovalDuration - property
1288
 
    @dbus_service_property(_interface, signature="t",
 
2028
    @dbus_service_property(_interface,
 
2029
                           signature="t",
1289
2030
                           access="readwrite")
1290
2031
    def ApprovalDuration_dbus_property(self, value=None):
1291
2032
        if value is None:       # get
1292
 
            return dbus.UInt64(timedelta_to_milliseconds(
1293
 
                    self.approval_duration))
 
2033
            return dbus.UInt64(self.approval_duration.total_seconds()
 
2034
                               * 1000)
1294
2035
        self.approval_duration = datetime.timedelta(0, 0, 0, value)
1295
 
    
 
2036
 
1296
2037
    # Name - property
 
2038
    @dbus_annotations(
 
2039
        {"org.freedesktop.DBus.Property.EmitsChangedSignal": "const"})
1297
2040
    @dbus_service_property(_interface, signature="s", access="read")
1298
2041
    def Name_dbus_property(self):
1299
2042
        return dbus.String(self.name)
1300
 
    
 
2043
 
 
2044
    # KeyID - property
 
2045
    @dbus_annotations(
 
2046
        {"org.freedesktop.DBus.Property.EmitsChangedSignal": "const"})
 
2047
    @dbus_service_property(_interface, signature="s", access="read")
 
2048
    def KeyID_dbus_property(self):
 
2049
        return dbus.String(self.key_id)
 
2050
 
1301
2051
    # Fingerprint - property
 
2052
    @dbus_annotations(
 
2053
        {"org.freedesktop.DBus.Property.EmitsChangedSignal": "const"})
1302
2054
    @dbus_service_property(_interface, signature="s", access="read")
1303
2055
    def Fingerprint_dbus_property(self):
1304
2056
        return dbus.String(self.fingerprint)
1305
 
    
 
2057
 
1306
2058
    # Host - property
1307
 
    @dbus_service_property(_interface, signature="s",
 
2059
    @dbus_service_property(_interface,
 
2060
                           signature="s",
1308
2061
                           access="readwrite")
1309
2062
    def Host_dbus_property(self, value=None):
1310
2063
        if value is None:       # get
1311
2064
            return dbus.String(self.host)
1312
 
        self.host = unicode(value)
1313
 
    
 
2065
        self.host = str(value)
 
2066
 
1314
2067
    # Created - property
 
2068
    @dbus_annotations(
 
2069
        {"org.freedesktop.DBus.Property.EmitsChangedSignal": "const"})
1315
2070
    @dbus_service_property(_interface, signature="s", access="read")
1316
2071
    def Created_dbus_property(self):
1317
2072
        return datetime_to_dbus(self.created)
1318
 
    
 
2073
 
1319
2074
    # LastEnabled - property
1320
2075
    @dbus_service_property(_interface, signature="s", access="read")
1321
2076
    def LastEnabled_dbus_property(self):
1322
2077
        return datetime_to_dbus(self.last_enabled)
1323
 
    
 
2078
 
1324
2079
    # Enabled - property
1325
 
    @dbus_service_property(_interface, signature="b",
 
2080
    @dbus_service_property(_interface,
 
2081
                           signature="b",
1326
2082
                           access="readwrite")
1327
2083
    def Enabled_dbus_property(self, value=None):
1328
2084
        if value is None:       # get
1331
2087
            self.enable()
1332
2088
        else:
1333
2089
            self.disable()
1334
 
    
 
2090
 
1335
2091
    # LastCheckedOK - property
1336
 
    @dbus_service_property(_interface, signature="s",
 
2092
    @dbus_service_property(_interface,
 
2093
                           signature="s",
1337
2094
                           access="readwrite")
1338
2095
    def LastCheckedOK_dbus_property(self, value=None):
1339
2096
        if value is not None:
1340
2097
            self.checked_ok()
1341
2098
            return
1342
2099
        return datetime_to_dbus(self.last_checked_ok)
1343
 
    
 
2100
 
 
2101
    # LastCheckerStatus - property
 
2102
    @dbus_service_property(_interface, signature="n", access="read")
 
2103
    def LastCheckerStatus_dbus_property(self):
 
2104
        return dbus.Int16(self.last_checker_status)
 
2105
 
1344
2106
    # Expires - property
1345
2107
    @dbus_service_property(_interface, signature="s", access="read")
1346
2108
    def Expires_dbus_property(self):
1347
2109
        return datetime_to_dbus(self.expires)
1348
 
    
 
2110
 
1349
2111
    # LastApprovalRequest - property
1350
2112
    @dbus_service_property(_interface, signature="s", access="read")
1351
2113
    def LastApprovalRequest_dbus_property(self):
1352
2114
        return datetime_to_dbus(self.last_approval_request)
1353
 
    
 
2115
 
1354
2116
    # Timeout - property
1355
 
    @dbus_service_property(_interface, signature="t",
 
2117
    @dbus_service_property(_interface,
 
2118
                           signature="t",
1356
2119
                           access="readwrite")
1357
2120
    def Timeout_dbus_property(self, value=None):
1358
2121
        if value is None:       # get
1359
 
            return dbus.UInt64(self.timeout_milliseconds())
 
2122
            return dbus.UInt64(self.timeout.total_seconds() * 1000)
 
2123
        old_timeout = self.timeout
1360
2124
        self.timeout = datetime.timedelta(0, 0, 0, value)
1361
 
        if getattr(self, "disable_initiator_tag", None) is None:
1362
 
            return
1363
 
        # Reschedule timeout
1364
 
        gobject.source_remove(self.disable_initiator_tag)
1365
 
        self.disable_initiator_tag = None
1366
 
        self.expires = None
1367
 
        time_to_die = timedelta_to_milliseconds((self
1368
 
                                                 .last_checked_ok
1369
 
                                                 + self.timeout)
1370
 
                                                - datetime.datetime
1371
 
                                                .utcnow())
1372
 
        if time_to_die <= 0:
1373
 
            # The timeout has passed
1374
 
            self.disable()
1375
 
        else:
1376
 
            self.expires = (datetime.datetime.utcnow()
1377
 
                            + datetime.timedelta(milliseconds =
1378
 
                                                 time_to_die))
1379
 
            self.disable_initiator_tag = (gobject.timeout_add
1380
 
                                          (time_to_die, self.disable))
1381
 
    
 
2125
        # Reschedule disabling
 
2126
        if self.enabled:
 
2127
            now = datetime.datetime.utcnow()
 
2128
            self.expires += self.timeout - old_timeout
 
2129
            if self.expires <= now:
 
2130
                # The timeout has passed
 
2131
                self.disable()
 
2132
            else:
 
2133
                if (getattr(self, "disable_initiator_tag", None)
 
2134
                    is None):
 
2135
                    return
 
2136
                GLib.source_remove(self.disable_initiator_tag)
 
2137
                self.disable_initiator_tag = GLib.timeout_add(
 
2138
                    int((self.expires - now).total_seconds() * 1000),
 
2139
                    self.disable)
 
2140
 
1382
2141
    # ExtendedTimeout - property
1383
 
    @dbus_service_property(_interface, signature="t",
 
2142
    @dbus_service_property(_interface,
 
2143
                           signature="t",
1384
2144
                           access="readwrite")
1385
2145
    def ExtendedTimeout_dbus_property(self, value=None):
1386
2146
        if value is None:       # get
1387
 
            return dbus.UInt64(self.extended_timeout_milliseconds())
 
2147
            return dbus.UInt64(self.extended_timeout.total_seconds()
 
2148
                               * 1000)
1388
2149
        self.extended_timeout = datetime.timedelta(0, 0, 0, value)
1389
 
    
 
2150
 
1390
2151
    # Interval - property
1391
 
    @dbus_service_property(_interface, signature="t",
 
2152
    @dbus_service_property(_interface,
 
2153
                           signature="t",
1392
2154
                           access="readwrite")
1393
2155
    def Interval_dbus_property(self, value=None):
1394
2156
        if value is None:       # get
1395
 
            return dbus.UInt64(self.interval_milliseconds())
 
2157
            return dbus.UInt64(self.interval.total_seconds() * 1000)
1396
2158
        self.interval = datetime.timedelta(0, 0, 0, value)
1397
2159
        if getattr(self, "checker_initiator_tag", None) is None:
1398
2160
            return
1399
2161
        if self.enabled:
1400
2162
            # Reschedule checker run
1401
 
            gobject.source_remove(self.checker_initiator_tag)
1402
 
            self.checker_initiator_tag = (gobject.timeout_add
1403
 
                                          (value, self.start_checker))
1404
 
            self.start_checker()    # Start one now, too
1405
 
    
 
2163
            GLib.source_remove(self.checker_initiator_tag)
 
2164
            self.checker_initiator_tag = GLib.timeout_add(
 
2165
                value, self.start_checker)
 
2166
            self.start_checker()  # Start one now, too
 
2167
 
1406
2168
    # Checker - property
1407
 
    @dbus_service_property(_interface, signature="s",
 
2169
    @dbus_service_property(_interface,
 
2170
                           signature="s",
1408
2171
                           access="readwrite")
1409
2172
    def Checker_dbus_property(self, value=None):
1410
2173
        if value is None:       # get
1411
2174
            return dbus.String(self.checker_command)
1412
 
        self.checker_command = unicode(value)
1413
 
    
 
2175
        self.checker_command = str(value)
 
2176
 
1414
2177
    # CheckerRunning - property
1415
 
    @dbus_service_property(_interface, signature="b",
 
2178
    @dbus_service_property(_interface,
 
2179
                           signature="b",
1416
2180
                           access="readwrite")
1417
2181
    def CheckerRunning_dbus_property(self, value=None):
1418
2182
        if value is None:       # get
1421
2185
            self.start_checker()
1422
2186
        else:
1423
2187
            self.stop_checker()
1424
 
    
 
2188
 
1425
2189
    # ObjectPath - property
 
2190
    @dbus_annotations(
 
2191
        {"org.freedesktop.DBus.Property.EmitsChangedSignal": "const",
 
2192
         "org.freedesktop.DBus.Deprecated": "true"})
1426
2193
    @dbus_service_property(_interface, signature="o", access="read")
1427
2194
    def ObjectPath_dbus_property(self):
1428
 
        return self.dbus_object_path # is already a dbus.ObjectPath
1429
 
    
 
2195
        return self.dbus_object_path  # is already a dbus.ObjectPath
 
2196
 
1430
2197
    # Secret = property
1431
 
    @dbus_service_property(_interface, signature="ay",
1432
 
                           access="write", byte_arrays=True)
 
2198
    @dbus_annotations(
 
2199
        {"org.freedesktop.DBus.Property.EmitsChangedSignal":
 
2200
         "invalidates"})
 
2201
    @dbus_service_property(_interface,
 
2202
                           signature="ay",
 
2203
                           access="write",
 
2204
                           byte_arrays=True)
1433
2205
    def Secret_dbus_property(self, value):
1434
 
        self.secret = str(value)
1435
 
    
 
2206
        self.secret = bytes(value)
 
2207
 
1436
2208
    del _interface
1437
2209
 
1438
2210
 
1439
2211
class ProxyClient(object):
1440
 
    def __init__(self, child_pipe, fpr, address):
 
2212
    def __init__(self, child_pipe, key_id, fpr, address):
1441
2213
        self._pipe = child_pipe
1442
 
        self._pipe.send(('init', fpr, address))
 
2214
        self._pipe.send(('init', key_id, fpr, address))
1443
2215
        if not self._pipe.recv():
1444
 
            raise KeyError()
1445
 
    
 
2216
            raise KeyError(key_id or fpr)
 
2217
 
1446
2218
    def __getattribute__(self, name):
1447
2219
        if name == '_pipe':
1448
2220
            return super(ProxyClient, self).__getattribute__(name)
1451
2223
        if data[0] == 'data':
1452
2224
            return data[1]
1453
2225
        if data[0] == 'function':
 
2226
 
1454
2227
            def func(*args, **kwargs):
1455
2228
                self._pipe.send(('funcall', name, args, kwargs))
1456
2229
                return self._pipe.recv()[1]
 
2230
 
1457
2231
            return func
1458
 
    
 
2232
 
1459
2233
    def __setattr__(self, name, value):
1460
2234
        if name == '_pipe':
1461
2235
            return super(ProxyClient, self).__setattr__(name, value)
1462
2236
        self._pipe.send(('setattr', name, value))
1463
2237
 
1464
2238
 
1465
 
class ClientDBusTransitional(ClientDBus):
1466
 
    __metaclass__ = AlternateDBusNamesMetaclass
1467
 
 
1468
 
 
1469
2239
class ClientHandler(socketserver.BaseRequestHandler, object):
1470
2240
    """A class to handle client connections.
1471
 
    
 
2241
 
1472
2242
    Instantiated once for each connection to handle it.
1473
2243
    Note: This will run in its own forked process."""
1474
 
    
 
2244
 
1475
2245
    def handle(self):
1476
2246
        with contextlib.closing(self.server.child_pipe) as child_pipe:
1477
2247
            logger.info("TCP connection from: %s",
1478
 
                        unicode(self.client_address))
 
2248
                        str(self.client_address))
1479
2249
            logger.debug("Pipe FD: %d",
1480
2250
                         self.server.child_pipe.fileno())
1481
 
            
1482
 
            session = (gnutls.connection
1483
 
                       .ClientSession(self.request,
1484
 
                                      gnutls.connection
1485
 
                                      .X509Credentials()))
1486
 
            
1487
 
            # Note: gnutls.connection.X509Credentials is really a
1488
 
            # generic GnuTLS certificate credentials object so long as
1489
 
            # no X.509 keys are added to it.  Therefore, we can use it
1490
 
            # here despite using OpenPGP certificates.
1491
 
            
1492
 
            #priority = ':'.join(("NONE", "+VERS-TLS1.1",
1493
 
            #                      "+AES-256-CBC", "+SHA1",
1494
 
            #                      "+COMP-NULL", "+CTYPE-OPENPGP",
1495
 
            #                      "+DHE-DSS"))
 
2251
 
 
2252
            session = gnutls.ClientSession(self.request)
 
2253
 
 
2254
            # priority = ':'.join(("NONE", "+VERS-TLS1.1",
 
2255
            #                       "+AES-256-CBC", "+SHA1",
 
2256
            #                       "+COMP-NULL", "+CTYPE-OPENPGP",
 
2257
            #                       "+DHE-DSS"))
1496
2258
            # Use a fallback default, since this MUST be set.
1497
2259
            priority = self.server.gnutls_priority
1498
2260
            if priority is None:
1499
2261
                priority = "NORMAL"
1500
 
            (gnutls.library.functions
1501
 
             .gnutls_priority_set_direct(session._c_object,
1502
 
                                         priority, None))
1503
 
            
 
2262
            gnutls.priority_set_direct(session._c_object,
 
2263
                                       priority.encode("utf-8"),
 
2264
                                       None)
 
2265
 
1504
2266
            # Start communication using the Mandos protocol
1505
2267
            # Get protocol number
1506
2268
            line = self.request.makefile().readline()
1507
2269
            logger.debug("Protocol version: %r", line)
1508
2270
            try:
1509
2271
                if int(line.strip().split()[0]) > 1:
1510
 
                    raise RuntimeError
 
2272
                    raise RuntimeError(line)
1511
2273
            except (ValueError, IndexError, RuntimeError) as error:
1512
2274
                logger.error("Unknown protocol version: %s", error)
1513
2275
                return
1514
 
            
 
2276
 
1515
2277
            # Start GnuTLS connection
1516
2278
            try:
1517
2279
                session.handshake()
1518
 
            except gnutls.errors.GNUTLSError as error:
 
2280
            except gnutls.Error as error:
1519
2281
                logger.warning("Handshake failed: %s", error)
1520
2282
                # Do not run session.bye() here: the session is not
1521
2283
                # established.  Just abandon the request.
1522
2284
                return
1523
2285
            logger.debug("Handshake succeeded")
1524
 
            
 
2286
 
1525
2287
            approval_required = False
1526
2288
            try:
1527
 
                try:
1528
 
                    fpr = self.fingerprint(self.peer_certificate
1529
 
                                           (session))
1530
 
                except (TypeError,
1531
 
                        gnutls.errors.GNUTLSError) as error:
1532
 
                    logger.warning("Bad certificate: %s", error)
1533
 
                    return
1534
 
                logger.debug("Fingerprint: %s", fpr)
1535
 
                
1536
 
                try:
1537
 
                    client = ProxyClient(child_pipe, fpr,
 
2289
                if gnutls.has_rawpk:
 
2290
                    fpr = ""
 
2291
                    try:
 
2292
                        key_id = self.key_id(
 
2293
                            self.peer_certificate(session))
 
2294
                    except (TypeError, gnutls.Error) as error:
 
2295
                        logger.warning("Bad certificate: %s", error)
 
2296
                        return
 
2297
                    logger.debug("Key ID: %s", key_id)
 
2298
 
 
2299
                else:
 
2300
                    key_id = ""
 
2301
                    try:
 
2302
                        fpr = self.fingerprint(
 
2303
                            self.peer_certificate(session))
 
2304
                    except (TypeError, gnutls.Error) as error:
 
2305
                        logger.warning("Bad certificate: %s", error)
 
2306
                        return
 
2307
                    logger.debug("Fingerprint: %s", fpr)
 
2308
 
 
2309
                try:
 
2310
                    client = ProxyClient(child_pipe, key_id, fpr,
1538
2311
                                         self.client_address)
1539
2312
                except KeyError:
1540
2313
                    return
1541
 
                
1542
 
                if self.server.use_dbus:
1543
 
                    # Emit D-Bus signal
1544
 
                    client.NewRequest(str(self.client_address))
1545
 
                
 
2314
 
1546
2315
                if client.approval_delay:
1547
2316
                    delay = client.approval_delay
1548
2317
                    client.approvals_pending += 1
1549
2318
                    approval_required = True
1550
 
                
 
2319
 
1551
2320
                while True:
1552
2321
                    if not client.enabled:
1553
2322
                        logger.info("Client %s is disabled",
1554
 
                                       client.name)
 
2323
                                    client.name)
1555
2324
                        if self.server.use_dbus:
1556
2325
                            # Emit D-Bus signal
1557
2326
                            client.Rejected("Disabled")
1558
2327
                        return
1559
 
                    
 
2328
 
1560
2329
                    if client.approved or not client.approval_delay:
1561
 
                        #We are approved or approval is disabled
 
2330
                        # We are approved or approval is disabled
1562
2331
                        break
1563
2332
                    elif client.approved is None:
1564
2333
                        logger.info("Client %s needs approval",
1566
2335
                        if self.server.use_dbus:
1567
2336
                            # Emit D-Bus signal
1568
2337
                            client.NeedApproval(
1569
 
                                client.approval_delay_milliseconds(),
1570
 
                                client.approved_by_default)
 
2338
                                client.approval_delay.total_seconds()
 
2339
                                * 1000, client.approved_by_default)
1571
2340
                    else:
1572
2341
                        logger.warning("Client %s was not approved",
1573
2342
                                       client.name)
1575
2344
                            # Emit D-Bus signal
1576
2345
                            client.Rejected("Denied")
1577
2346
                        return
1578
 
                    
1579
 
                    #wait until timeout or approved
 
2347
 
 
2348
                    # wait until timeout or approved
1580
2349
                    time = datetime.datetime.now()
1581
2350
                    client.changedstate.acquire()
1582
 
                    (client.changedstate.wait
1583
 
                     (float(client.timedelta_to_milliseconds(delay)
1584
 
                            / 1000)))
 
2351
                    client.changedstate.wait(delay.total_seconds())
1585
2352
                    client.changedstate.release()
1586
2353
                    time2 = datetime.datetime.now()
1587
2354
                    if (time2 - time) >= delay:
1597
2364
                            break
1598
2365
                    else:
1599
2366
                        delay -= time2 - time
1600
 
                
1601
 
                sent_size = 0
1602
 
                while sent_size < len(client.secret):
1603
 
                    try:
1604
 
                        sent = session.send(client.secret[sent_size:])
1605
 
                    except gnutls.errors.GNUTLSError as error:
1606
 
                        logger.warning("gnutls send failed")
1607
 
                        return
1608
 
                    logger.debug("Sent: %d, remaining: %d",
1609
 
                                 sent, len(client.secret)
1610
 
                                 - (sent_size + sent))
1611
 
                    sent_size += sent
1612
 
                
 
2367
 
 
2368
                try:
 
2369
                    session.send(client.secret)
 
2370
                except gnutls.Error as error:
 
2371
                    logger.warning("gnutls send failed",
 
2372
                                   exc_info=error)
 
2373
                    return
 
2374
 
1613
2375
                logger.info("Sending secret to %s", client.name)
1614
2376
                # bump the timeout using extended_timeout
1615
 
                client.checked_ok(client.extended_timeout)
 
2377
                client.bump_timeout(client.extended_timeout)
1616
2378
                if self.server.use_dbus:
1617
2379
                    # Emit D-Bus signal
1618
2380
                    client.GotSecret()
1619
 
            
 
2381
 
1620
2382
            finally:
1621
2383
                if approval_required:
1622
2384
                    client.approvals_pending -= 1
1623
2385
                try:
1624
2386
                    session.bye()
1625
 
                except gnutls.errors.GNUTLSError as error:
1626
 
                    logger.warning("GnuTLS bye failed")
1627
 
    
 
2387
                except gnutls.Error as error:
 
2388
                    logger.warning("GnuTLS bye failed",
 
2389
                                   exc_info=error)
 
2390
 
1628
2391
    @staticmethod
1629
2392
    def peer_certificate(session):
1630
 
        "Return the peer's OpenPGP certificate as a bytestring"
1631
 
        # If not an OpenPGP certificate...
1632
 
        if (gnutls.library.functions
1633
 
            .gnutls_certificate_type_get(session._c_object)
1634
 
            != gnutls.library.constants.GNUTLS_CRT_OPENPGP):
1635
 
            # ...do the normal thing
1636
 
            return session.peer_certificate
 
2393
        "Return the peer's certificate as a bytestring"
 
2394
        try:
 
2395
            cert_type = gnutls.certificate_type_get2(session._c_object,
 
2396
                                                     gnutls.CTYPE_PEERS)
 
2397
        except AttributeError:
 
2398
            cert_type = gnutls.certificate_type_get(session._c_object)
 
2399
        if gnutls.has_rawpk:
 
2400
            valid_cert_types = frozenset((gnutls.CRT_RAWPK,))
 
2401
        else:
 
2402
            valid_cert_types = frozenset((gnutls.CRT_OPENPGP,))
 
2403
        # If not a valid certificate type...
 
2404
        if cert_type not in valid_cert_types:
 
2405
            logger.info("Cert type %r not in %r", cert_type,
 
2406
                        valid_cert_types)
 
2407
            # ...return invalid data
 
2408
            return b""
1637
2409
        list_size = ctypes.c_uint(1)
1638
 
        cert_list = (gnutls.library.functions
1639
 
                     .gnutls_certificate_get_peers
 
2410
        cert_list = (gnutls.certificate_get_peers
1640
2411
                     (session._c_object, ctypes.byref(list_size)))
1641
2412
        if not bool(cert_list) and list_size.value != 0:
1642
 
            raise gnutls.errors.GNUTLSError("error getting peer"
1643
 
                                            " certificate")
 
2413
            raise gnutls.Error("error getting peer certificate")
1644
2414
        if list_size.value == 0:
1645
2415
            return None
1646
2416
        cert = cert_list[0]
1647
2417
        return ctypes.string_at(cert.data, cert.size)
1648
 
    
 
2418
 
 
2419
    @staticmethod
 
2420
    def key_id(certificate):
 
2421
        "Convert a certificate bytestring to a hexdigit key ID"
 
2422
        # New GnuTLS "datum" with the public key
 
2423
        datum = gnutls.datum_t(
 
2424
            ctypes.cast(ctypes.c_char_p(certificate),
 
2425
                        ctypes.POINTER(ctypes.c_ubyte)),
 
2426
            ctypes.c_uint(len(certificate)))
 
2427
        # XXX all these need to be created in the gnutls "module"
 
2428
        # New empty GnuTLS certificate
 
2429
        pubkey = gnutls.pubkey_t()
 
2430
        gnutls.pubkey_init(ctypes.byref(pubkey))
 
2431
        # Import the raw public key into the certificate
 
2432
        gnutls.pubkey_import(pubkey,
 
2433
                             ctypes.byref(datum),
 
2434
                             gnutls.X509_FMT_DER)
 
2435
        # New buffer for the key ID
 
2436
        buf = ctypes.create_string_buffer(32)
 
2437
        buf_len = ctypes.c_size_t(len(buf))
 
2438
        # Get the key ID from the raw public key into the buffer
 
2439
        gnutls.pubkey_get_key_id(pubkey,
 
2440
                                 gnutls.KEYID_USE_SHA256,
 
2441
                                 ctypes.cast(ctypes.byref(buf),
 
2442
                                             ctypes.POINTER(ctypes.c_ubyte)),
 
2443
                                 ctypes.byref(buf_len))
 
2444
        # Deinit the certificate
 
2445
        gnutls.pubkey_deinit(pubkey)
 
2446
 
 
2447
        # Convert the buffer to a Python bytestring
 
2448
        key_id = ctypes.string_at(buf, buf_len.value)
 
2449
        # Convert the bytestring to hexadecimal notation
 
2450
        hex_key_id = binascii.hexlify(key_id).upper()
 
2451
        return hex_key_id
 
2452
 
1649
2453
    @staticmethod
1650
2454
    def fingerprint(openpgp):
1651
2455
        "Convert an OpenPGP bytestring to a hexdigit fingerprint"
1652
2456
        # New GnuTLS "datum" with the OpenPGP public key
1653
 
        datum = (gnutls.library.types
1654
 
                 .gnutls_datum_t(ctypes.cast(ctypes.c_char_p(openpgp),
1655
 
                                             ctypes.POINTER
1656
 
                                             (ctypes.c_ubyte)),
1657
 
                                 ctypes.c_uint(len(openpgp))))
 
2457
        datum = gnutls.datum_t(
 
2458
            ctypes.cast(ctypes.c_char_p(openpgp),
 
2459
                        ctypes.POINTER(ctypes.c_ubyte)),
 
2460
            ctypes.c_uint(len(openpgp)))
1658
2461
        # New empty GnuTLS certificate
1659
 
        crt = gnutls.library.types.gnutls_openpgp_crt_t()
1660
 
        (gnutls.library.functions
1661
 
         .gnutls_openpgp_crt_init(ctypes.byref(crt)))
 
2462
        crt = gnutls.openpgp_crt_t()
 
2463
        gnutls.openpgp_crt_init(ctypes.byref(crt))
1662
2464
        # Import the OpenPGP public key into the certificate
1663
 
        (gnutls.library.functions
1664
 
         .gnutls_openpgp_crt_import(crt, ctypes.byref(datum),
1665
 
                                    gnutls.library.constants
1666
 
                                    .GNUTLS_OPENPGP_FMT_RAW))
 
2465
        gnutls.openpgp_crt_import(crt, ctypes.byref(datum),
 
2466
                                  gnutls.OPENPGP_FMT_RAW)
1667
2467
        # Verify the self signature in the key
1668
2468
        crtverify = ctypes.c_uint()
1669
 
        (gnutls.library.functions
1670
 
         .gnutls_openpgp_crt_verify_self(crt, 0,
1671
 
                                         ctypes.byref(crtverify)))
 
2469
        gnutls.openpgp_crt_verify_self(crt, 0,
 
2470
                                       ctypes.byref(crtverify))
1672
2471
        if crtverify.value != 0:
1673
 
            gnutls.library.functions.gnutls_openpgp_crt_deinit(crt)
1674
 
            raise (gnutls.errors.CertificateSecurityError
1675
 
                   ("Verify failed"))
 
2472
            gnutls.openpgp_crt_deinit(crt)
 
2473
            raise gnutls.CertificateSecurityError(code
 
2474
                                                  =crtverify.value)
1676
2475
        # New buffer for the fingerprint
1677
2476
        buf = ctypes.create_string_buffer(20)
1678
2477
        buf_len = ctypes.c_size_t()
1679
2478
        # Get the fingerprint from the certificate into the buffer
1680
 
        (gnutls.library.functions
1681
 
         .gnutls_openpgp_crt_get_fingerprint(crt, ctypes.byref(buf),
1682
 
                                             ctypes.byref(buf_len)))
 
2479
        gnutls.openpgp_crt_get_fingerprint(crt, ctypes.byref(buf),
 
2480
                                           ctypes.byref(buf_len))
1683
2481
        # Deinit the certificate
1684
 
        gnutls.library.functions.gnutls_openpgp_crt_deinit(crt)
 
2482
        gnutls.openpgp_crt_deinit(crt)
1685
2483
        # Convert the buffer to a Python bytestring
1686
2484
        fpr = ctypes.string_at(buf, buf_len.value)
1687
2485
        # Convert the bytestring to hexadecimal notation
1691
2489
 
1692
2490
class MultiprocessingMixIn(object):
1693
2491
    """Like socketserver.ThreadingMixIn, but with multiprocessing"""
 
2492
 
1694
2493
    def sub_process_main(self, request, address):
1695
2494
        try:
1696
2495
            self.finish_request(request, address)
1697
2496
        except Exception:
1698
2497
            self.handle_error(request, address)
1699
2498
        self.close_request(request)
1700
 
    
 
2499
 
1701
2500
    def process_request(self, request, address):
1702
2501
        """Start a new process to process the request."""
1703
 
        proc = multiprocessing.Process(target = self.sub_process_main,
1704
 
                                       args = (request,
1705
 
                                               address))
 
2502
        proc = multiprocessing.Process(target=self.sub_process_main,
 
2503
                                       args=(request, address))
1706
2504
        proc.start()
1707
2505
        return proc
1708
2506
 
1709
2507
 
1710
2508
class MultiprocessingMixInWithPipe(MultiprocessingMixIn, object):
1711
2509
    """ adds a pipe to the MixIn """
 
2510
 
1712
2511
    def process_request(self, request, client_address):
1713
2512
        """Overrides and wraps the original process_request().
1714
 
        
 
2513
 
1715
2514
        This function creates a new pipe in self.pipe
1716
2515
        """
1717
2516
        parent_pipe, self.child_pipe = multiprocessing.Pipe()
1718
 
        
 
2517
 
1719
2518
        proc = MultiprocessingMixIn.process_request(self, request,
1720
2519
                                                    client_address)
1721
2520
        self.child_pipe.close()
1722
2521
        self.add_pipe(parent_pipe, proc)
1723
 
    
 
2522
 
1724
2523
    def add_pipe(self, parent_pipe, proc):
1725
2524
        """Dummy function; override as necessary"""
1726
 
        raise NotImplementedError
 
2525
        raise NotImplementedError()
1727
2526
 
1728
2527
 
1729
2528
class IPv6_TCPServer(MultiprocessingMixInWithPipe,
1730
2529
                     socketserver.TCPServer, object):
1731
2530
    """IPv6-capable TCP server.  Accepts 'None' as address and/or port
1732
 
    
 
2531
 
1733
2532
    Attributes:
1734
2533
        enabled:        Boolean; whether this server is activated yet
1735
2534
        interface:      None or a network interface name (string)
1736
2535
        use_ipv6:       Boolean; to use IPv6 or not
1737
2536
    """
 
2537
 
1738
2538
    def __init__(self, server_address, RequestHandlerClass,
1739
 
                 interface=None, use_ipv6=True):
 
2539
                 interface=None,
 
2540
                 use_ipv6=True,
 
2541
                 socketfd=None):
 
2542
        """If socketfd is set, use that file descriptor instead of
 
2543
        creating a new one with socket.socket().
 
2544
        """
1740
2545
        self.interface = interface
1741
2546
        if use_ipv6:
1742
2547
            self.address_family = socket.AF_INET6
 
2548
        if socketfd is not None:
 
2549
            # Save the file descriptor
 
2550
            self.socketfd = socketfd
 
2551
            # Save the original socket.socket() function
 
2552
            self.socket_socket = socket.socket
 
2553
 
 
2554
            # To implement --socket, we monkey patch socket.socket.
 
2555
            #
 
2556
            # (When socketserver.TCPServer is a new-style class, we
 
2557
            # could make self.socket into a property instead of monkey
 
2558
            # patching socket.socket.)
 
2559
            #
 
2560
            # Create a one-time-only replacement for socket.socket()
 
2561
            @functools.wraps(socket.socket)
 
2562
            def socket_wrapper(*args, **kwargs):
 
2563
                # Restore original function so subsequent calls are
 
2564
                # not affected.
 
2565
                socket.socket = self.socket_socket
 
2566
                del self.socket_socket
 
2567
                # This time only, return a new socket object from the
 
2568
                # saved file descriptor.
 
2569
                return socket.fromfd(self.socketfd, *args, **kwargs)
 
2570
            # Replace socket.socket() function with wrapper
 
2571
            socket.socket = socket_wrapper
 
2572
        # The socketserver.TCPServer.__init__ will call
 
2573
        # socket.socket(), which might be our replacement,
 
2574
        # socket_wrapper(), if socketfd was set.
1743
2575
        socketserver.TCPServer.__init__(self, server_address,
1744
2576
                                        RequestHandlerClass)
 
2577
 
1745
2578
    def server_bind(self):
1746
2579
        """This overrides the normal server_bind() function
1747
2580
        to bind to an interface if one was specified, and also NOT to
1748
2581
        bind to an address or port if they were not specified."""
 
2582
        global SO_BINDTODEVICE
1749
2583
        if self.interface is not None:
1750
2584
            if SO_BINDTODEVICE is None:
1751
 
                logger.error("SO_BINDTODEVICE does not exist;"
1752
 
                             " cannot bind to interface %s",
1753
 
                             self.interface)
1754
 
            else:
1755
 
                try:
1756
 
                    self.socket.setsockopt(socket.SOL_SOCKET,
1757
 
                                           SO_BINDTODEVICE,
1758
 
                                           str(self.interface
1759
 
                                               + '\0'))
1760
 
                except socket.error as error:
1761
 
                    if error[0] == errno.EPERM:
1762
 
                        logger.error("No permission to"
1763
 
                                     " bind to interface %s",
1764
 
                                     self.interface)
1765
 
                    elif error[0] == errno.ENOPROTOOPT:
1766
 
                        logger.error("SO_BINDTODEVICE not available;"
1767
 
                                     " cannot bind to interface %s",
1768
 
                                     self.interface)
1769
 
                    else:
1770
 
                        raise
 
2585
                # Fall back to a hard-coded value which seems to be
 
2586
                # common enough.
 
2587
                logger.warning("SO_BINDTODEVICE not found, trying 25")
 
2588
                SO_BINDTODEVICE = 25
 
2589
            try:
 
2590
                self.socket.setsockopt(
 
2591
                    socket.SOL_SOCKET, SO_BINDTODEVICE,
 
2592
                    (self.interface + "\0").encode("utf-8"))
 
2593
            except socket.error as error:
 
2594
                if error.errno == errno.EPERM:
 
2595
                    logger.error("No permission to bind to"
 
2596
                                 " interface %s", self.interface)
 
2597
                elif error.errno == errno.ENOPROTOOPT:
 
2598
                    logger.error("SO_BINDTODEVICE not available;"
 
2599
                                 " cannot bind to interface %s",
 
2600
                                 self.interface)
 
2601
                elif error.errno == errno.ENODEV:
 
2602
                    logger.error("Interface %s does not exist,"
 
2603
                                 " cannot bind", self.interface)
 
2604
                else:
 
2605
                    raise
1771
2606
        # Only bind(2) the socket if we really need to.
1772
2607
        if self.server_address[0] or self.server_address[1]:
 
2608
            if self.server_address[1]:
 
2609
                self.allow_reuse_address = True
1773
2610
            if not self.server_address[0]:
1774
2611
                if self.address_family == socket.AF_INET6:
1775
 
                    any_address = "::" # in6addr_any
 
2612
                    any_address = "::"  # in6addr_any
1776
2613
                else:
1777
 
                    any_address = socket.INADDR_ANY
 
2614
                    any_address = "0.0.0.0"  # INADDR_ANY
1778
2615
                self.server_address = (any_address,
1779
2616
                                       self.server_address[1])
1780
2617
            elif not self.server_address[1]:
1781
 
                self.server_address = (self.server_address[0],
1782
 
                                       0)
 
2618
                self.server_address = (self.server_address[0], 0)
1783
2619
#                 if self.interface:
1784
2620
#                     self.server_address = (self.server_address[0],
1785
2621
#                                            0, # port
1791
2627
 
1792
2628
class MandosServer(IPv6_TCPServer):
1793
2629
    """Mandos server.
1794
 
    
 
2630
 
1795
2631
    Attributes:
1796
2632
        clients:        set of Client objects
1797
2633
        gnutls_priority GnuTLS priority string
1798
2634
        use_dbus:       Boolean; to emit D-Bus signals or not
1799
 
    
1800
 
    Assumes a gobject.MainLoop event loop.
 
2635
 
 
2636
    Assumes a GLib.MainLoop event loop.
1801
2637
    """
 
2638
 
1802
2639
    def __init__(self, server_address, RequestHandlerClass,
1803
 
                 interface=None, use_ipv6=True, clients=None,
1804
 
                 gnutls_priority=None, use_dbus=True):
 
2640
                 interface=None,
 
2641
                 use_ipv6=True,
 
2642
                 clients=None,
 
2643
                 gnutls_priority=None,
 
2644
                 use_dbus=True,
 
2645
                 socketfd=None):
1805
2646
        self.enabled = False
1806
2647
        self.clients = clients
1807
2648
        if self.clients is None:
1810
2651
        self.gnutls_priority = gnutls_priority
1811
2652
        IPv6_TCPServer.__init__(self, server_address,
1812
2653
                                RequestHandlerClass,
1813
 
                                interface = interface,
1814
 
                                use_ipv6 = use_ipv6)
 
2654
                                interface=interface,
 
2655
                                use_ipv6=use_ipv6,
 
2656
                                socketfd=socketfd)
 
2657
 
1815
2658
    def server_activate(self):
1816
2659
        if self.enabled:
1817
2660
            return socketserver.TCPServer.server_activate(self)
1818
 
    
 
2661
 
1819
2662
    def enable(self):
1820
2663
        self.enabled = True
1821
 
    
 
2664
 
1822
2665
    def add_pipe(self, parent_pipe, proc):
1823
2666
        # Call "handle_ipc" for both data and EOF events
1824
 
        gobject.io_add_watch(parent_pipe.fileno(),
1825
 
                             gobject.IO_IN | gobject.IO_HUP,
1826
 
                             functools.partial(self.handle_ipc,
1827
 
                                               parent_pipe =
1828
 
                                               parent_pipe,
1829
 
                                               proc = proc))
1830
 
    
1831
 
    def handle_ipc(self, source, condition, parent_pipe=None,
1832
 
                   proc = None, client_object=None):
1833
 
        condition_names = {
1834
 
            gobject.IO_IN: "IN",   # There is data to read.
1835
 
            gobject.IO_OUT: "OUT", # Data can be written (without
1836
 
                                    # blocking).
1837
 
            gobject.IO_PRI: "PRI", # There is urgent data to read.
1838
 
            gobject.IO_ERR: "ERR", # Error condition.
1839
 
            gobject.IO_HUP: "HUP"  # Hung up (the connection has been
1840
 
                                    # broken, usually for pipes and
1841
 
                                    # sockets).
1842
 
            }
1843
 
        conditions_string = ' | '.join(name
1844
 
                                       for cond, name in
1845
 
                                       condition_names.iteritems()
1846
 
                                       if cond & condition)
 
2667
        GLib.io_add_watch(
 
2668
            parent_pipe.fileno(),
 
2669
            GLib.IO_IN | GLib.IO_HUP,
 
2670
            functools.partial(self.handle_ipc,
 
2671
                              parent_pipe=parent_pipe,
 
2672
                              proc=proc))
 
2673
 
 
2674
    def handle_ipc(self, source, condition,
 
2675
                   parent_pipe=None,
 
2676
                   proc=None,
 
2677
                   client_object=None):
1847
2678
        # error, or the other end of multiprocessing.Pipe has closed
1848
 
        if condition & (gobject.IO_ERR | condition & gobject.IO_HUP):
 
2679
        if condition & (GLib.IO_ERR | GLib.IO_HUP):
1849
2680
            # Wait for other process to exit
1850
2681
            proc.join()
1851
2682
            return False
1852
 
        
 
2683
 
1853
2684
        # Read a request from the child
1854
2685
        request = parent_pipe.recv()
1855
2686
        command = request[0]
1856
 
        
 
2687
 
1857
2688
        if command == 'init':
1858
 
            fpr = request[1]
1859
 
            address = request[2]
1860
 
            
1861
 
            for c in self.clients.itervalues():
1862
 
                if c.fingerprint == fpr:
 
2689
            key_id = request[1].decode("ascii")
 
2690
            fpr = request[2].decode("ascii")
 
2691
            address = request[3]
 
2692
 
 
2693
            for c in self.clients.values():
 
2694
                if key_id == "E3B0C44298FC1C149AFBF4C8996FB92427AE41E4649B934CA495991B7852B855":
 
2695
                    continue
 
2696
                if key_id and c.key_id == key_id:
 
2697
                    client = c
 
2698
                    break
 
2699
                if fpr and c.fingerprint == fpr:
1863
2700
                    client = c
1864
2701
                    break
1865
2702
            else:
1866
 
                logger.info("Client not found for fingerprint: %s, ad"
1867
 
                            "dress: %s", fpr, address)
 
2703
                logger.info("Client not found for key ID: %s, address"
 
2704
                            ": %s", key_id or fpr, address)
1868
2705
                if self.use_dbus:
1869
2706
                    # Emit D-Bus signal
1870
 
                    mandos_dbus_service.ClientNotFound(fpr,
 
2707
                    mandos_dbus_service.ClientNotFound(key_id or fpr,
1871
2708
                                                       address[0])
1872
2709
                parent_pipe.send(False)
1873
2710
                return False
1874
 
            
1875
 
            gobject.io_add_watch(parent_pipe.fileno(),
1876
 
                                 gobject.IO_IN | gobject.IO_HUP,
1877
 
                                 functools.partial(self.handle_ipc,
1878
 
                                                   parent_pipe =
1879
 
                                                   parent_pipe,
1880
 
                                                   proc = proc,
1881
 
                                                   client_object =
1882
 
                                                   client))
 
2711
 
 
2712
            GLib.io_add_watch(
 
2713
                parent_pipe.fileno(),
 
2714
                GLib.IO_IN | GLib.IO_HUP,
 
2715
                functools.partial(self.handle_ipc,
 
2716
                                  parent_pipe=parent_pipe,
 
2717
                                  proc=proc,
 
2718
                                  client_object=client))
1883
2719
            parent_pipe.send(True)
1884
2720
            # remove the old hook in favor of the new above hook on
1885
2721
            # same fileno
1888
2724
            funcname = request[1]
1889
2725
            args = request[2]
1890
2726
            kwargs = request[3]
1891
 
            
 
2727
 
1892
2728
            parent_pipe.send(('data', getattr(client_object,
1893
2729
                                              funcname)(*args,
1894
 
                                                         **kwargs)))
1895
 
        
 
2730
                                                        **kwargs)))
 
2731
 
1896
2732
        if command == 'getattr':
1897
2733
            attrname = request[1]
1898
 
            if callable(client_object.__getattribute__(attrname)):
1899
 
                parent_pipe.send(('function',))
 
2734
            if isinstance(client_object.__getattribute__(attrname),
 
2735
                          collections.Callable):
 
2736
                parent_pipe.send(('function', ))
1900
2737
            else:
1901
 
                parent_pipe.send(('data', client_object
1902
 
                                  .__getattribute__(attrname)))
1903
 
        
 
2738
                parent_pipe.send((
 
2739
                    'data', client_object.__getattribute__(attrname)))
 
2740
 
1904
2741
        if command == 'setattr':
1905
2742
            attrname = request[1]
1906
2743
            value = request[2]
1907
2744
            setattr(client_object, attrname, value)
1908
 
        
 
2745
 
1909
2746
        return True
1910
2747
 
1911
2748
 
 
2749
def rfc3339_duration_to_delta(duration):
 
2750
    """Parse an RFC 3339 "duration" and return a datetime.timedelta
 
2751
 
 
2752
    >>> rfc3339_duration_to_delta("P7D")
 
2753
    datetime.timedelta(7)
 
2754
    >>> rfc3339_duration_to_delta("PT60S")
 
2755
    datetime.timedelta(0, 60)
 
2756
    >>> rfc3339_duration_to_delta("PT60M")
 
2757
    datetime.timedelta(0, 3600)
 
2758
    >>> rfc3339_duration_to_delta("PT24H")
 
2759
    datetime.timedelta(1)
 
2760
    >>> rfc3339_duration_to_delta("P1W")
 
2761
    datetime.timedelta(7)
 
2762
    >>> rfc3339_duration_to_delta("PT5M30S")
 
2763
    datetime.timedelta(0, 330)
 
2764
    >>> rfc3339_duration_to_delta("P1DT3M20S")
 
2765
    datetime.timedelta(1, 200)
 
2766
    """
 
2767
 
 
2768
    # Parsing an RFC 3339 duration with regular expressions is not
 
2769
    # possible - there would have to be multiple places for the same
 
2770
    # values, like seconds.  The current code, while more esoteric, is
 
2771
    # cleaner without depending on a parsing library.  If Python had a
 
2772
    # built-in library for parsing we would use it, but we'd like to
 
2773
    # avoid excessive use of external libraries.
 
2774
 
 
2775
    # New type for defining tokens, syntax, and semantics all-in-one
 
2776
    Token = collections.namedtuple("Token", (
 
2777
        "regexp",  # To match token; if "value" is not None, must have
 
2778
                   # a "group" containing digits
 
2779
        "value",   # datetime.timedelta or None
 
2780
        "followers"))           # Tokens valid after this token
 
2781
    # RFC 3339 "duration" tokens, syntax, and semantics; taken from
 
2782
    # the "duration" ABNF definition in RFC 3339, Appendix A.
 
2783
    token_end = Token(re.compile(r"$"), None, frozenset())
 
2784
    token_second = Token(re.compile(r"(\d+)S"),
 
2785
                         datetime.timedelta(seconds=1),
 
2786
                         frozenset((token_end, )))
 
2787
    token_minute = Token(re.compile(r"(\d+)M"),
 
2788
                         datetime.timedelta(minutes=1),
 
2789
                         frozenset((token_second, token_end)))
 
2790
    token_hour = Token(re.compile(r"(\d+)H"),
 
2791
                       datetime.timedelta(hours=1),
 
2792
                       frozenset((token_minute, token_end)))
 
2793
    token_time = Token(re.compile(r"T"),
 
2794
                       None,
 
2795
                       frozenset((token_hour, token_minute,
 
2796
                                  token_second)))
 
2797
    token_day = Token(re.compile(r"(\d+)D"),
 
2798
                      datetime.timedelta(days=1),
 
2799
                      frozenset((token_time, token_end)))
 
2800
    token_month = Token(re.compile(r"(\d+)M"),
 
2801
                        datetime.timedelta(weeks=4),
 
2802
                        frozenset((token_day, token_end)))
 
2803
    token_year = Token(re.compile(r"(\d+)Y"),
 
2804
                       datetime.timedelta(weeks=52),
 
2805
                       frozenset((token_month, token_end)))
 
2806
    token_week = Token(re.compile(r"(\d+)W"),
 
2807
                       datetime.timedelta(weeks=1),
 
2808
                       frozenset((token_end, )))
 
2809
    token_duration = Token(re.compile(r"P"), None,
 
2810
                           frozenset((token_year, token_month,
 
2811
                                      token_day, token_time,
 
2812
                                      token_week)))
 
2813
    # Define starting values:
 
2814
    # Value so far
 
2815
    value = datetime.timedelta()
 
2816
    found_token = None
 
2817
    # Following valid tokens
 
2818
    followers = frozenset((token_duration, ))
 
2819
    # String left to parse
 
2820
    s = duration
 
2821
    # Loop until end token is found
 
2822
    while found_token is not token_end:
 
2823
        # Search for any currently valid tokens
 
2824
        for token in followers:
 
2825
            match = token.regexp.match(s)
 
2826
            if match is not None:
 
2827
                # Token found
 
2828
                if token.value is not None:
 
2829
                    # Value found, parse digits
 
2830
                    factor = int(match.group(1), 10)
 
2831
                    # Add to value so far
 
2832
                    value += factor * token.value
 
2833
                # Strip token from string
 
2834
                s = token.regexp.sub("", s, 1)
 
2835
                # Go to found token
 
2836
                found_token = token
 
2837
                # Set valid next tokens
 
2838
                followers = found_token.followers
 
2839
                break
 
2840
        else:
 
2841
            # No currently valid tokens were found
 
2842
            raise ValueError("Invalid RFC 3339 duration: {!r}"
 
2843
                             .format(duration))
 
2844
    # End token found
 
2845
    return value
 
2846
 
 
2847
 
1912
2848
def string_to_delta(interval):
1913
2849
    """Parse a string and return a datetime.timedelta
1914
 
    
 
2850
 
1915
2851
    >>> string_to_delta('7d')
1916
2852
    datetime.timedelta(7)
1917
2853
    >>> string_to_delta('60s')
1925
2861
    >>> string_to_delta('5m 30s')
1926
2862
    datetime.timedelta(0, 330)
1927
2863
    """
 
2864
 
 
2865
    try:
 
2866
        return rfc3339_duration_to_delta(interval)
 
2867
    except ValueError:
 
2868
        pass
 
2869
 
1928
2870
    timevalue = datetime.timedelta(0)
1929
2871
    for s in interval.split():
1930
2872
        try:
1931
 
            suffix = unicode(s[-1])
 
2873
            suffix = s[-1]
1932
2874
            value = int(s[:-1])
1933
2875
            if suffix == "d":
1934
2876
                delta = datetime.timedelta(value)
1941
2883
            elif suffix == "w":
1942
2884
                delta = datetime.timedelta(0, 0, 0, 0, 0, 0, value)
1943
2885
            else:
1944
 
                raise ValueError("Unknown suffix %r" % suffix)
1945
 
        except (ValueError, IndexError) as e:
 
2886
                raise ValueError("Unknown suffix {!r}".format(suffix))
 
2887
        except IndexError as e:
1946
2888
            raise ValueError(*(e.args))
1947
2889
        timevalue += delta
1948
2890
    return timevalue
1949
2891
 
1950
2892
 
1951
 
def daemon(nochdir = False, noclose = False):
 
2893
def daemon(nochdir=False, noclose=False):
1952
2894
    """See daemon(3).  Standard BSD Unix function.
1953
 
    
 
2895
 
1954
2896
    This should really exist as os.daemon, but it doesn't (yet)."""
1955
2897
    if os.fork():
1956
2898
        sys.exit()
1961
2903
        sys.exit()
1962
2904
    if not noclose:
1963
2905
        # Close all standard open file descriptors
1964
 
        null = os.open(os.path.devnull, os.O_NOCTTY | os.O_RDWR)
 
2906
        null = os.open(os.devnull, os.O_NOCTTY | os.O_RDWR)
1965
2907
        if not stat.S_ISCHR(os.fstat(null).st_mode):
1966
2908
            raise OSError(errno.ENODEV,
1967
 
                          "%s not a character device"
1968
 
                          % os.path.devnull)
 
2909
                          "{} not a character device"
 
2910
                          .format(os.devnull))
1969
2911
        os.dup2(null, sys.stdin.fileno())
1970
2912
        os.dup2(null, sys.stdout.fileno())
1971
2913
        os.dup2(null, sys.stderr.fileno())
1974
2916
 
1975
2917
 
1976
2918
def main():
1977
 
    
 
2919
 
1978
2920
    ##################################################################
1979
2921
    # Parsing of options, both command line and config file
1980
 
    
 
2922
 
1981
2923
    parser = argparse.ArgumentParser()
1982
2924
    parser.add_argument("-v", "--version", action="version",
1983
 
                        version = "%%(prog)s %s" % version,
 
2925
                        version="%(prog)s {}".format(version),
1984
2926
                        help="show version number and exit")
1985
2927
    parser.add_argument("-i", "--interface", metavar="IF",
1986
2928
                        help="Bind to interface IF")
1992
2934
                        help="Run self-test")
1993
2935
    parser.add_argument("--debug", action="store_true",
1994
2936
                        help="Debug mode; run in foreground and log"
1995
 
                        " to terminal")
 
2937
                        " to terminal", default=None)
1996
2938
    parser.add_argument("--debuglevel", metavar="LEVEL",
1997
2939
                        help="Debug level for stdout output")
1998
2940
    parser.add_argument("--priority", help="GnuTLS"
2005
2947
                        " files")
2006
2948
    parser.add_argument("--no-dbus", action="store_false",
2007
2949
                        dest="use_dbus", help="Do not provide D-Bus"
2008
 
                        " system bus interface")
 
2950
                        " system bus interface", default=None)
2009
2951
    parser.add_argument("--no-ipv6", action="store_false",
2010
 
                        dest="use_ipv6", help="Do not use IPv6")
 
2952
                        dest="use_ipv6", help="Do not use IPv6",
 
2953
                        default=None)
2011
2954
    parser.add_argument("--no-restore", action="store_false",
2012
2955
                        dest="restore", help="Do not restore stored"
2013
 
                        " state")
 
2956
                        " state", default=None)
 
2957
    parser.add_argument("--socket", type=int,
 
2958
                        help="Specify a file descriptor to a network"
 
2959
                        " socket to use instead of creating one")
2014
2960
    parser.add_argument("--statedir", metavar="DIR",
2015
2961
                        help="Directory to save/restore state in")
2016
 
    
 
2962
    parser.add_argument("--foreground", action="store_true",
 
2963
                        help="Run in foreground", default=None)
 
2964
    parser.add_argument("--no-zeroconf", action="store_false",
 
2965
                        dest="zeroconf", help="Do not use Zeroconf",
 
2966
                        default=None)
 
2967
 
2017
2968
    options = parser.parse_args()
2018
 
    
 
2969
 
2019
2970
    if options.check:
2020
2971
        import doctest
2021
 
        doctest.testmod()
2022
 
        sys.exit()
2023
 
    
 
2972
        fail_count, test_count = doctest.testmod()
 
2973
        sys.exit(os.EX_OK if fail_count == 0 else 1)
 
2974
 
2024
2975
    # Default values for config file for server-global settings
2025
 
    server_defaults = { "interface": "",
2026
 
                        "address": "",
2027
 
                        "port": "",
2028
 
                        "debug": "False",
2029
 
                        "priority":
2030
 
                        "SECURE256:!CTYPE-X.509:+CTYPE-OPENPGP",
2031
 
                        "servicename": "Mandos",
2032
 
                        "use_dbus": "True",
2033
 
                        "use_ipv6": "True",
2034
 
                        "debuglevel": "",
2035
 
                        "restore": "True",
2036
 
                        "statedir": "/var/lib/mandos"
2037
 
                        }
2038
 
    
 
2976
    if gnutls.has_rawpk:
 
2977
        priority = ("SECURE128:!CTYPE-X.509:+CTYPE-RAWPK:!RSA"
 
2978
                    ":!VERS-ALL:+VERS-TLS1.3:%PROFILE_ULTRA")
 
2979
    else:
 
2980
        priority = ("SECURE256:!CTYPE-X.509:+CTYPE-OPENPGP:!RSA"
 
2981
                    ":+SIGN-DSA-SHA256")
 
2982
    server_defaults = {"interface": "",
 
2983
                       "address": "",
 
2984
                       "port": "",
 
2985
                       "debug": "False",
 
2986
                       "priority": priority,
 
2987
                       "servicename": "Mandos",
 
2988
                       "use_dbus": "True",
 
2989
                       "use_ipv6": "True",
 
2990
                       "debuglevel": "",
 
2991
                       "restore": "True",
 
2992
                       "socket": "",
 
2993
                       "statedir": "/var/lib/mandos",
 
2994
                       "foreground": "False",
 
2995
                       "zeroconf": "True",
 
2996
                       }
 
2997
    del priority
 
2998
 
2039
2999
    # Parse config file for server-global settings
2040
3000
    server_config = configparser.SafeConfigParser(server_defaults)
2041
3001
    del server_defaults
2042
 
    server_config.read(os.path.join(options.configdir,
2043
 
                                    "mandos.conf"))
 
3002
    server_config.read(os.path.join(options.configdir, "mandos.conf"))
2044
3003
    # Convert the SafeConfigParser object to a dict
2045
3004
    server_settings = server_config.defaults()
2046
3005
    # Use the appropriate methods on the non-string config options
2047
 
    for option in ("debug", "use_dbus", "use_ipv6"):
 
3006
    for option in ("debug", "use_dbus", "use_ipv6", "restore",
 
3007
                   "foreground", "zeroconf"):
2048
3008
        server_settings[option] = server_config.getboolean("DEFAULT",
2049
3009
                                                           option)
2050
3010
    if server_settings["port"]:
2051
3011
        server_settings["port"] = server_config.getint("DEFAULT",
2052
3012
                                                       "port")
 
3013
    if server_settings["socket"]:
 
3014
        server_settings["socket"] = server_config.getint("DEFAULT",
 
3015
                                                         "socket")
 
3016
        # Later, stdin will, and stdout and stderr might, be dup'ed
 
3017
        # over with an opened os.devnull.  But we don't want this to
 
3018
        # happen with a supplied network socket.
 
3019
        if 0 <= server_settings["socket"] <= 2:
 
3020
            server_settings["socket"] = os.dup(server_settings
 
3021
                                               ["socket"])
2053
3022
    del server_config
2054
 
    
 
3023
 
2055
3024
    # Override the settings from the config file with command line
2056
3025
    # options, if set.
2057
3026
    for option in ("interface", "address", "port", "debug",
2058
 
                   "priority", "servicename", "configdir",
2059
 
                   "use_dbus", "use_ipv6", "debuglevel", "restore",
2060
 
                   "statedir"):
 
3027
                   "priority", "servicename", "configdir", "use_dbus",
 
3028
                   "use_ipv6", "debuglevel", "restore", "statedir",
 
3029
                   "socket", "foreground", "zeroconf"):
2061
3030
        value = getattr(options, option)
2062
3031
        if value is not None:
2063
3032
            server_settings[option] = value
2064
3033
    del options
2065
3034
    # Force all strings to be unicode
2066
3035
    for option in server_settings.keys():
2067
 
        if type(server_settings[option]) is str:
2068
 
            server_settings[option] = unicode(server_settings[option])
 
3036
        if isinstance(server_settings[option], bytes):
 
3037
            server_settings[option] = (server_settings[option]
 
3038
                                       .decode("utf-8"))
 
3039
    # Force all boolean options to be boolean
 
3040
    for option in ("debug", "use_dbus", "use_ipv6", "restore",
 
3041
                   "foreground", "zeroconf"):
 
3042
        server_settings[option] = bool(server_settings[option])
 
3043
    # Debug implies foreground
 
3044
    if server_settings["debug"]:
 
3045
        server_settings["foreground"] = True
2069
3046
    # Now we have our good server settings in "server_settings"
2070
 
    
 
3047
 
2071
3048
    ##################################################################
2072
 
    
 
3049
 
 
3050
    if (not server_settings["zeroconf"]
 
3051
        and not (server_settings["port"]
 
3052
                 or server_settings["socket"] != "")):
 
3053
        parser.error("Needs port or socket to work without Zeroconf")
 
3054
 
2073
3055
    # For convenience
2074
3056
    debug = server_settings["debug"]
2075
3057
    debuglevel = server_settings["debuglevel"]
2077
3059
    use_ipv6 = server_settings["use_ipv6"]
2078
3060
    stored_state_path = os.path.join(server_settings["statedir"],
2079
3061
                                     stored_state_file)
2080
 
    
 
3062
    foreground = server_settings["foreground"]
 
3063
    zeroconf = server_settings["zeroconf"]
 
3064
 
2081
3065
    if debug:
2082
3066
        initlogger(debug, logging.DEBUG)
2083
3067
    else:
2086
3070
        else:
2087
3071
            level = getattr(logging, debuglevel.upper())
2088
3072
            initlogger(debug, level)
2089
 
    
 
3073
 
2090
3074
    if server_settings["servicename"] != "Mandos":
2091
 
        syslogger.setFormatter(logging.Formatter
2092
 
                               ('Mandos (%s) [%%(process)d]:'
2093
 
                                ' %%(levelname)s: %%(message)s'
2094
 
                                % server_settings["servicename"]))
2095
 
    
 
3075
        syslogger.setFormatter(
 
3076
            logging.Formatter('Mandos ({}) [%(process)d]:'
 
3077
                              ' %(levelname)s: %(message)s'.format(
 
3078
                                  server_settings["servicename"])))
 
3079
 
2096
3080
    # Parse config file with clients
2097
 
    client_config = configparser.SafeConfigParser(Client.client_defaults)
 
3081
    client_config = configparser.SafeConfigParser(Client
 
3082
                                                  .client_defaults)
2098
3083
    client_config.read(os.path.join(server_settings["configdir"],
2099
3084
                                    "clients.conf"))
2100
 
    
 
3085
 
2101
3086
    global mandos_dbus_service
2102
3087
    mandos_dbus_service = None
2103
 
    
2104
 
    tcp_server = MandosServer((server_settings["address"],
2105
 
                               server_settings["port"]),
2106
 
                              ClientHandler,
2107
 
                              interface=(server_settings["interface"]
2108
 
                                         or None),
2109
 
                              use_ipv6=use_ipv6,
2110
 
                              gnutls_priority=
2111
 
                              server_settings["priority"],
2112
 
                              use_dbus=use_dbus)
2113
 
    if not debug:
2114
 
        pidfilename = "/var/run/mandos.pid"
2115
 
        try:
2116
 
            pidfile = open(pidfilename, "w")
2117
 
        except IOError:
2118
 
            logger.error("Could not open file %r", pidfilename)
2119
 
    
2120
 
    try:
2121
 
        uid = pwd.getpwnam("_mandos").pw_uid
2122
 
        gid = pwd.getpwnam("_mandos").pw_gid
2123
 
    except KeyError:
2124
 
        try:
2125
 
            uid = pwd.getpwnam("mandos").pw_uid
2126
 
            gid = pwd.getpwnam("mandos").pw_gid
 
3088
 
 
3089
    socketfd = None
 
3090
    if server_settings["socket"] != "":
 
3091
        socketfd = server_settings["socket"]
 
3092
    tcp_server = MandosServer(
 
3093
        (server_settings["address"], server_settings["port"]),
 
3094
        ClientHandler,
 
3095
        interface=(server_settings["interface"] or None),
 
3096
        use_ipv6=use_ipv6,
 
3097
        gnutls_priority=server_settings["priority"],
 
3098
        use_dbus=use_dbus,
 
3099
        socketfd=socketfd)
 
3100
    if not foreground:
 
3101
        pidfilename = "/run/mandos.pid"
 
3102
        if not os.path.isdir("/run/."):
 
3103
            pidfilename = "/var/run/mandos.pid"
 
3104
        pidfile = None
 
3105
        try:
 
3106
            pidfile = codecs.open(pidfilename, "w", encoding="utf-8")
 
3107
        except IOError as e:
 
3108
            logger.error("Could not open file %r", pidfilename,
 
3109
                         exc_info=e)
 
3110
 
 
3111
    for name, group in (("_mandos", "_mandos"),
 
3112
                        ("mandos", "mandos"),
 
3113
                        ("nobody", "nogroup")):
 
3114
        try:
 
3115
            uid = pwd.getpwnam(name).pw_uid
 
3116
            gid = pwd.getpwnam(group).pw_gid
 
3117
            break
2127
3118
        except KeyError:
2128
 
            try:
2129
 
                uid = pwd.getpwnam("nobody").pw_uid
2130
 
                gid = pwd.getpwnam("nobody").pw_gid
2131
 
            except KeyError:
2132
 
                uid = 65534
2133
 
                gid = 65534
 
3119
            continue
 
3120
    else:
 
3121
        uid = 65534
 
3122
        gid = 65534
2134
3123
    try:
2135
3124
        os.setgid(gid)
2136
3125
        os.setuid(uid)
 
3126
        if debug:
 
3127
            logger.debug("Did setuid/setgid to {}:{}".format(uid,
 
3128
                                                             gid))
2137
3129
    except OSError as error:
2138
 
        if error[0] != errno.EPERM:
2139
 
            raise error
2140
 
    
 
3130
        logger.warning("Failed to setuid/setgid to {}:{}: {}"
 
3131
                       .format(uid, gid, os.strerror(error.errno)))
 
3132
        if error.errno != errno.EPERM:
 
3133
            raise
 
3134
 
2141
3135
    if debug:
2142
3136
        # Enable all possible GnuTLS debugging
2143
 
        
 
3137
 
2144
3138
        # "Use a log level over 10 to enable all debugging options."
2145
3139
        # - GnuTLS manual
2146
 
        gnutls.library.functions.gnutls_global_set_log_level(11)
2147
 
        
2148
 
        @gnutls.library.types.gnutls_log_func
 
3140
        gnutls.global_set_log_level(11)
 
3141
 
 
3142
        @gnutls.log_func
2149
3143
        def debug_gnutls(level, string):
2150
3144
            logger.debug("GnuTLS: %s", string[:-1])
2151
 
        
2152
 
        (gnutls.library.functions
2153
 
         .gnutls_global_set_log_function(debug_gnutls))
2154
 
        
 
3145
 
 
3146
        gnutls.global_set_log_function(debug_gnutls)
 
3147
 
2155
3148
        # Redirect stdin so all checkers get /dev/null
2156
 
        null = os.open(os.path.devnull, os.O_NOCTTY | os.O_RDWR)
 
3149
        null = os.open(os.devnull, os.O_NOCTTY | os.O_RDWR)
2157
3150
        os.dup2(null, sys.stdin.fileno())
2158
3151
        if null > 2:
2159
3152
            os.close(null)
2160
 
    
 
3153
 
2161
3154
    # Need to fork before connecting to D-Bus
2162
 
    if not debug:
 
3155
    if not foreground:
2163
3156
        # Close all input and output, do double fork, etc.
2164
3157
        daemon()
2165
 
    
2166
 
    gobject.threads_init()
2167
 
    
 
3158
 
 
3159
    # multiprocessing will use threads, so before we use GLib we need
 
3160
    # to inform GLib that threads will be used.
 
3161
    GLib.threads_init()
 
3162
 
2168
3163
    global main_loop
2169
3164
    # From the Avahi example code
2170
 
    DBusGMainLoop(set_as_default=True )
2171
 
    main_loop = gobject.MainLoop()
 
3165
    DBusGMainLoop(set_as_default=True)
 
3166
    main_loop = GLib.MainLoop()
2172
3167
    bus = dbus.SystemBus()
2173
3168
    # End of Avahi example code
2174
3169
    if use_dbus:
2175
3170
        try:
2176
3171
            bus_name = dbus.service.BusName("se.recompile.Mandos",
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")
 
3172
                                            bus,
 
3173
                                            do_not_queue=True)
 
3174
            old_bus_name = dbus.service.BusName(
 
3175
                "se.bsnet.fukt.Mandos", bus,
 
3176
                do_not_queue=True)
 
3177
        except dbus.exceptions.DBusException as e:
 
3178
            logger.error("Disabling D-Bus:", exc_info=e)
2183
3179
            use_dbus = False
2184
3180
            server_settings["use_dbus"] = False
2185
3181
            tcp_server.use_dbus = False
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
 
    
 
3182
    if zeroconf:
 
3183
        protocol = avahi.PROTO_INET6 if use_ipv6 else avahi.PROTO_INET
 
3184
        service = AvahiServiceToSyslog(
 
3185
            name=server_settings["servicename"],
 
3186
            servicetype="_mandos._tcp",
 
3187
            protocol=protocol,
 
3188
            bus=bus)
 
3189
        if server_settings["interface"]:
 
3190
            service.interface = if_nametoindex(
 
3191
                server_settings["interface"].encode("utf-8"))
 
3192
 
2195
3193
    global multiprocessing_manager
2196
3194
    multiprocessing_manager = multiprocessing.Manager()
2197
 
    
 
3195
 
2198
3196
    client_class = Client
2199
3197
    if use_dbus:
2200
 
        client_class = functools.partial(ClientDBusTransitional,
2201
 
                                         bus = bus)
2202
 
    
 
3198
        client_class = functools.partial(ClientDBus, bus=bus)
 
3199
 
2203
3200
    client_settings = Client.config_parser(client_config)
2204
3201
    old_client_settings = {}
2205
3202
    clients_data = {}
2206
 
    
 
3203
 
 
3204
    # This is used to redirect stdout and stderr for checker processes
 
3205
    global wnull
 
3206
    wnull = open(os.devnull, "w")  # A writable /dev/null
 
3207
    # Only used if server is running in foreground but not in debug
 
3208
    # mode
 
3209
    if debug or not foreground:
 
3210
        wnull.close()
 
3211
 
2207
3212
    # Get client data and settings from last running state.
2208
3213
    if server_settings["restore"]:
2209
3214
        try:
2210
3215
            with open(stored_state_path, "rb") as stored_state:
2211
 
                clients_data, old_client_settings = (pickle.load
2212
 
                                                     (stored_state))
 
3216
                if sys.version_info.major == 2:
 
3217
                    clients_data, old_client_settings = pickle.load(
 
3218
                        stored_state)
 
3219
                else:
 
3220
                    bytes_clients_data, bytes_old_client_settings = (
 
3221
                        pickle.load(stored_state, encoding="bytes"))
 
3222
                    #   Fix bytes to strings
 
3223
                    #  clients_data
 
3224
                    # .keys()
 
3225
                    clients_data = {(key.decode("utf-8")
 
3226
                                     if isinstance(key, bytes)
 
3227
                                     else key): value
 
3228
                                    for key, value in
 
3229
                                    bytes_clients_data.items()}
 
3230
                    del bytes_clients_data
 
3231
                    for key in clients_data:
 
3232
                        value = {(k.decode("utf-8")
 
3233
                                  if isinstance(k, bytes) else k): v
 
3234
                                 for k, v in
 
3235
                                 clients_data[key].items()}
 
3236
                        clients_data[key] = value
 
3237
                        # .client_structure
 
3238
                        value["client_structure"] = [
 
3239
                            (s.decode("utf-8")
 
3240
                             if isinstance(s, bytes)
 
3241
                             else s) for s in
 
3242
                            value["client_structure"]]
 
3243
                        # .name & .host
 
3244
                        for k in ("name", "host"):
 
3245
                            if isinstance(value[k], bytes):
 
3246
                                value[k] = value[k].decode("utf-8")
 
3247
                        if not value.has_key("key_id"):
 
3248
                            value["key_id"] = ""
 
3249
                        elif not value.has_key("fingerprint"):
 
3250
                            value["fingerprint"] = ""
 
3251
                    #  old_client_settings
 
3252
                    # .keys()
 
3253
                    old_client_settings = {
 
3254
                        (key.decode("utf-8")
 
3255
                         if isinstance(key, bytes)
 
3256
                         else key): value
 
3257
                        for key, value in
 
3258
                        bytes_old_client_settings.items()}
 
3259
                    del bytes_old_client_settings
 
3260
                    # .host
 
3261
                    for value in old_client_settings.values():
 
3262
                        if isinstance(value["host"], bytes):
 
3263
                            value["host"] = (value["host"]
 
3264
                                             .decode("utf-8"))
2213
3265
            os.remove(stored_state_path)
2214
3266
        except IOError as e:
2215
 
            logger.warning("Could not load persistent state: {0}"
2216
 
                           .format(e))
2217
 
            if e.errno != errno.ENOENT:
 
3267
            if e.errno == errno.ENOENT:
 
3268
                logger.warning("Could not load persistent state:"
 
3269
                               " {}".format(os.strerror(e.errno)))
 
3270
            else:
 
3271
                logger.critical("Could not load persistent state:",
 
3272
                                exc_info=e)
2218
3273
                raise
2219
3274
        except EOFError as e:
2220
3275
            logger.warning("Could not load persistent state: "
2221
 
                           "EOFError: {0}".format(e))
2222
 
    
 
3276
                           "EOFError:",
 
3277
                           exc_info=e)
 
3278
 
2223
3279
    with PGPEngine() as pgp:
2224
 
        for client_name, client in clients_data.iteritems():
 
3280
        for client_name, client in clients_data.items():
 
3281
            # Skip removed clients
 
3282
            if client_name not in client_settings:
 
3283
                continue
 
3284
 
2225
3285
            # Decide which value to use after restoring saved state.
2226
3286
            # We have three different values: Old config file,
2227
3287
            # new config file, and saved state.
2232
3292
                    # For each value in new config, check if it
2233
3293
                    # differs from the old config value (Except for
2234
3294
                    # the "secret" attribute)
2235
 
                    if (name != "secret" and
2236
 
                        value != old_client_settings[client_name]
2237
 
                        [name]):
 
3295
                    if (name != "secret"
 
3296
                        and (value !=
 
3297
                             old_client_settings[client_name][name])):
2238
3298
                        client[name] = value
2239
3299
                except KeyError:
2240
3300
                    pass
2241
 
            
 
3301
 
2242
3302
            # Clients who has passed its expire date can still be
2243
 
            # enabled if its last checker was successful.  Clients
2244
 
            # whose checker failed before we stored its state is
2245
 
            # assumed to have failed all checkers during downtime.
 
3303
            # enabled if its last checker was successful.  A Client
 
3304
            # whose checker succeeded before we stored its state is
 
3305
            # assumed to have successfully run all checkers during
 
3306
            # downtime.
2246
3307
            if client["enabled"]:
2247
3308
                if datetime.datetime.utcnow() >= client["expires"]:
2248
3309
                    if not client["last_checked_ok"]:
2249
3310
                        logger.warning(
2250
 
                            "disabling client {0} - Client never "
2251
 
                            "performed a successfull checker"
2252
 
                            .format(client["name"]))
 
3311
                            "disabling client {} - Client never "
 
3312
                            "performed a successful checker".format(
 
3313
                                client_name))
2253
3314
                        client["enabled"] = False
2254
3315
                    elif client["last_checker_status"] != 0:
2255
3316
                        logger.warning(
2256
 
                            "disabling client {0} - Client "
2257
 
                            "last checker failed with error code {1}"
2258
 
                            .format(client["name"],
2259
 
                                    client["last_checker_status"]))
 
3317
                            "disabling client {} - Client last"
 
3318
                            " checker failed with error code"
 
3319
                            " {}".format(
 
3320
                                client_name,
 
3321
                                client["last_checker_status"]))
2260
3322
                        client["enabled"] = False
2261
3323
                    else:
2262
 
                        client["expires"] = (datetime.datetime
2263
 
                                             .utcnow()
2264
 
                                             + client["timeout"])
2265
 
                    
 
3324
                        client["expires"] = (
 
3325
                            datetime.datetime.utcnow()
 
3326
                            + client["timeout"])
 
3327
                        logger.debug("Last checker succeeded,"
 
3328
                                     " keeping {} enabled".format(
 
3329
                                         client_name))
2266
3330
            try:
2267
 
                client["secret"] = (
2268
 
                    pgp.decrypt(client["encrypted_secret"],
2269
 
                                client_settings[client_name]
2270
 
                                ["secret"]))
 
3331
                client["secret"] = pgp.decrypt(
 
3332
                    client["encrypted_secret"],
 
3333
                    client_settings[client_name]["secret"])
2271
3334
            except PGPError:
2272
3335
                # If decryption fails, we use secret from new settings
2273
 
                logger.debug("Failed to decrypt {0} old secret"
2274
 
                             .format(client_name))
2275
 
                client["secret"] = (
2276
 
                    client_settings[client_name]["secret"])
 
3336
                logger.debug("Failed to decrypt {} old secret".format(
 
3337
                    client_name))
 
3338
                client["secret"] = (client_settings[client_name]
 
3339
                                    ["secret"])
2277
3340
 
2278
 
    
2279
3341
    # Add/remove clients based on new changes made to config
2280
 
    for client_name in set(old_client_settings) - set(client_settings):
 
3342
    for client_name in (set(old_client_settings)
 
3343
                        - set(client_settings)):
2281
3344
        del clients_data[client_name]
2282
 
    for client_name in set(client_settings) - set(old_client_settings):
 
3345
    for client_name in (set(client_settings)
 
3346
                        - set(old_client_settings)):
2283
3347
        clients_data[client_name] = client_settings[client_name]
2284
3348
 
2285
 
    # Create clients all clients
2286
 
    for client_name, client in clients_data.iteritems():
 
3349
    # Create all client objects
 
3350
    for client_name, client in clients_data.items():
2287
3351
        tcp_server.clients[client_name] = client_class(
2288
 
            name = client_name, settings = client)
2289
 
    
 
3352
            name=client_name,
 
3353
            settings=client,
 
3354
            server_settings=server_settings)
 
3355
 
2290
3356
    if not tcp_server.clients:
2291
3357
        logger.warning("No clients defined")
2292
 
        
2293
 
    if not debug:
2294
 
        try:
2295
 
            with pidfile:
2296
 
                pid = os.getpid()
2297
 
                pidfile.write(str(pid) + "\n".encode("utf-8"))
2298
 
            del pidfile
2299
 
        except IOError:
2300
 
            logger.error("Could not write to file %r with PID %d",
2301
 
                         pidfilename, pid)
2302
 
        except NameError:
2303
 
            # "pidfile" was never created
2304
 
            pass
 
3358
 
 
3359
    if not foreground:
 
3360
        if pidfile is not None:
 
3361
            pid = os.getpid()
 
3362
            try:
 
3363
                with pidfile:
 
3364
                    print(pid, file=pidfile)
 
3365
            except IOError:
 
3366
                logger.error("Could not write to file %r with PID %d",
 
3367
                             pidfilename, pid)
 
3368
        del pidfile
2305
3369
        del pidfilename
2306
 
        signal.signal(signal.SIGINT, signal.SIG_IGN)
2307
 
    
2308
 
    signal.signal(signal.SIGHUP, lambda signum, frame: sys.exit())
2309
 
    signal.signal(signal.SIGTERM, lambda signum, frame: sys.exit())
2310
 
    
 
3370
 
 
3371
    for termsig in (signal.SIGHUP, signal.SIGTERM):
 
3372
        GLib.unix_signal_add(GLib.PRIORITY_HIGH, termsig,
 
3373
                             lambda: main_loop.quit() and False)
 
3374
 
2311
3375
    if use_dbus:
2312
 
        class MandosDBusService(dbus.service.Object):
 
3376
 
 
3377
        @alternate_dbus_interfaces(
 
3378
            {"se.recompile.Mandos": "se.bsnet.fukt.Mandos"})
 
3379
        class MandosDBusService(DBusObjectWithObjectManager):
2313
3380
            """A D-Bus proxy object"""
 
3381
 
2314
3382
            def __init__(self):
2315
3383
                dbus.service.Object.__init__(self, bus, "/")
 
3384
 
2316
3385
            _interface = "se.recompile.Mandos"
2317
 
            
 
3386
 
2318
3387
            @dbus.service.signal(_interface, signature="o")
2319
3388
            def ClientAdded(self, objpath):
2320
3389
                "D-Bus signal"
2321
3390
                pass
2322
 
            
 
3391
 
2323
3392
            @dbus.service.signal(_interface, signature="ss")
2324
 
            def ClientNotFound(self, fingerprint, address):
 
3393
            def ClientNotFound(self, key_id, address):
2325
3394
                "D-Bus signal"
2326
3395
                pass
2327
 
            
 
3396
 
 
3397
            @dbus_annotations({"org.freedesktop.DBus.Deprecated":
 
3398
                               "true"})
2328
3399
            @dbus.service.signal(_interface, signature="os")
2329
3400
            def ClientRemoved(self, objpath, name):
2330
3401
                "D-Bus signal"
2331
3402
                pass
2332
 
            
 
3403
 
 
3404
            @dbus_annotations({"org.freedesktop.DBus.Deprecated":
 
3405
                               "true"})
2333
3406
            @dbus.service.method(_interface, out_signature="ao")
2334
3407
            def GetAllClients(self):
2335
3408
                "D-Bus method"
2336
 
                return dbus.Array(c.dbus_object_path
2337
 
                                  for c in
2338
 
                                  tcp_server.clients.itervalues())
2339
 
            
 
3409
                return dbus.Array(c.dbus_object_path for c in
 
3410
                                  tcp_server.clients.values())
 
3411
 
 
3412
            @dbus_annotations({"org.freedesktop.DBus.Deprecated":
 
3413
                               "true"})
2340
3414
            @dbus.service.method(_interface,
2341
3415
                                 out_signature="a{oa{sv}}")
2342
3416
            def GetAllClientsWithProperties(self):
2343
3417
                "D-Bus method"
2344
3418
                return dbus.Dictionary(
2345
 
                    ((c.dbus_object_path, c.GetAll(""))
2346
 
                     for c in tcp_server.clients.itervalues()),
 
3419
                    {c.dbus_object_path: c.GetAll(
 
3420
                        "se.recompile.Mandos.Client")
 
3421
                     for c in tcp_server.clients.values()},
2347
3422
                    signature="oa{sv}")
2348
 
            
 
3423
 
2349
3424
            @dbus.service.method(_interface, in_signature="o")
2350
3425
            def RemoveClient(self, object_path):
2351
3426
                "D-Bus method"
2352
 
                for c in tcp_server.clients.itervalues():
 
3427
                for c in tcp_server.clients.values():
2353
3428
                    if c.dbus_object_path == object_path:
2354
3429
                        del tcp_server.clients[c.name]
2355
3430
                        c.remove_from_connection()
2356
 
                        # Don't signal anything except ClientRemoved
 
3431
                        # Don't signal the disabling
2357
3432
                        c.disable(quiet=True)
2358
 
                        # Emit D-Bus signal
2359
 
                        self.ClientRemoved(object_path, c.name)
 
3433
                        # Emit D-Bus signal for removal
 
3434
                        self.client_removed_signal(c)
2360
3435
                        return
2361
3436
                raise KeyError(object_path)
2362
 
            
 
3437
 
2363
3438
            del _interface
2364
 
        
2365
 
        class MandosDBusServiceTransitional(MandosDBusService):
2366
 
            __metaclass__ = AlternateDBusNamesMetaclass
2367
 
        mandos_dbus_service = MandosDBusServiceTransitional()
2368
 
    
 
3439
 
 
3440
            @dbus.service.method(dbus.OBJECT_MANAGER_IFACE,
 
3441
                                 out_signature="a{oa{sa{sv}}}")
 
3442
            def GetManagedObjects(self):
 
3443
                """D-Bus method"""
 
3444
                return dbus.Dictionary(
 
3445
                    {client.dbus_object_path:
 
3446
                     dbus.Dictionary(
 
3447
                         {interface: client.GetAll(interface)
 
3448
                          for interface in
 
3449
                          client._get_all_interface_names()})
 
3450
                     for client in tcp_server.clients.values()})
 
3451
 
 
3452
            def client_added_signal(self, client):
 
3453
                """Send the new standard signal and the old signal"""
 
3454
                if use_dbus:
 
3455
                    # New standard signal
 
3456
                    self.InterfacesAdded(
 
3457
                        client.dbus_object_path,
 
3458
                        dbus.Dictionary(
 
3459
                            {interface: client.GetAll(interface)
 
3460
                             for interface in
 
3461
                             client._get_all_interface_names()}))
 
3462
                    # Old signal
 
3463
                    self.ClientAdded(client.dbus_object_path)
 
3464
 
 
3465
            def client_removed_signal(self, client):
 
3466
                """Send the new standard signal and the old signal"""
 
3467
                if use_dbus:
 
3468
                    # New standard signal
 
3469
                    self.InterfacesRemoved(
 
3470
                        client.dbus_object_path,
 
3471
                        client._get_all_interface_names())
 
3472
                    # Old signal
 
3473
                    self.ClientRemoved(client.dbus_object_path,
 
3474
                                       client.name)
 
3475
 
 
3476
        mandos_dbus_service = MandosDBusService()
 
3477
 
 
3478
    # Save modules to variables to exempt the modules from being
 
3479
    # unloaded before the function registered with atexit() is run.
 
3480
    mp = multiprocessing
 
3481
    wn = wnull
 
3482
 
2369
3483
    def cleanup():
2370
3484
        "Cleanup function; run on exit"
2371
 
        service.cleanup()
2372
 
        
2373
 
        multiprocessing.active_children()
 
3485
        if zeroconf:
 
3486
            service.cleanup()
 
3487
 
 
3488
        mp.active_children()
 
3489
        wn.close()
2374
3490
        if not (tcp_server.clients or client_settings):
2375
3491
            return
2376
 
        
 
3492
 
2377
3493
        # Store client before exiting. Secrets are encrypted with key
2378
3494
        # based on what config file has. If config file is
2379
3495
        # removed/edited, old secret will thus be unrecovable.
2380
3496
        clients = {}
2381
3497
        with PGPEngine() as pgp:
2382
 
            for client in tcp_server.clients.itervalues():
 
3498
            for client in tcp_server.clients.values():
2383
3499
                key = client_settings[client.name]["secret"]
2384
3500
                client.encrypted_secret = pgp.encrypt(client.secret,
2385
3501
                                                      key)
2386
3502
                client_dict = {}
2387
 
                
 
3503
 
2388
3504
                # A list of attributes that can not be pickled
2389
3505
                # + secret.
2390
 
                exclude = set(("bus", "changedstate", "secret",
2391
 
                               "checker"))
2392
 
                for name, typ in (inspect.getmembers
2393
 
                                  (dbus.service.Object)):
 
3506
                exclude = {"bus", "changedstate", "secret",
 
3507
                           "checker", "server_settings"}
 
3508
                for name, typ in inspect.getmembers(dbus.service
 
3509
                                                    .Object):
2394
3510
                    exclude.add(name)
2395
 
                
 
3511
 
2396
3512
                client_dict["encrypted_secret"] = (client
2397
3513
                                                   .encrypted_secret)
2398
3514
                for attr in client.client_structure:
2399
3515
                    if attr not in exclude:
2400
3516
                        client_dict[attr] = getattr(client, attr)
2401
 
                
 
3517
 
2402
3518
                clients[client.name] = client_dict
2403
3519
                del client_settings[client.name]["secret"]
2404
 
        
 
3520
 
2405
3521
        try:
2406
 
            tempfd, tempname = tempfile.mkstemp(suffix=".pickle",
2407
 
                                                prefix="clients-",
2408
 
                                                dir=os.path.dirname
2409
 
                                                (stored_state_path))
2410
 
            with os.fdopen(tempfd, "wb") as stored_state:
2411
 
                pickle.dump((clients, client_settings), stored_state)
 
3522
            with tempfile.NamedTemporaryFile(
 
3523
                    mode='wb',
 
3524
                    suffix=".pickle",
 
3525
                    prefix='clients-',
 
3526
                    dir=os.path.dirname(stored_state_path),
 
3527
                    delete=False) as stored_state:
 
3528
                pickle.dump((clients, client_settings), stored_state,
 
3529
                            protocol=2)
 
3530
                tempname = stored_state.name
2412
3531
            os.rename(tempname, stored_state_path)
2413
3532
        except (IOError, OSError) as e:
2414
 
            logger.warning("Could not save persistent state: {0}"
2415
 
                           .format(e))
2416
3533
            if not debug:
2417
3534
                try:
2418
3535
                    os.remove(tempname)
2419
3536
                except NameError:
2420
3537
                    pass
2421
 
            if e.errno not in set((errno.ENOENT, errno.EACCES,
2422
 
                                   errno.EEXIST)):
2423
 
                raise e
2424
 
        
 
3538
            if e.errno in (errno.ENOENT, errno.EACCES, errno.EEXIST):
 
3539
                logger.warning("Could not save persistent state: {}"
 
3540
                               .format(os.strerror(e.errno)))
 
3541
            else:
 
3542
                logger.warning("Could not save persistent state:",
 
3543
                               exc_info=e)
 
3544
                raise
 
3545
 
2425
3546
        # Delete all clients, and settings from config
2426
3547
        while tcp_server.clients:
2427
3548
            name, client = tcp_server.clients.popitem()
2428
3549
            if use_dbus:
2429
3550
                client.remove_from_connection()
2430
 
            # Don't signal anything except ClientRemoved
 
3551
            # Don't signal the disabling
2431
3552
            client.disable(quiet=True)
 
3553
            # Emit D-Bus signal for removal
2432
3554
            if use_dbus:
2433
 
                # Emit D-Bus signal
2434
 
                mandos_dbus_service.ClientRemoved(client
2435
 
                                                  .dbus_object_path,
2436
 
                                                  client.name)
 
3555
                mandos_dbus_service.client_removed_signal(client)
2437
3556
        client_settings.clear()
2438
 
    
 
3557
 
2439
3558
    atexit.register(cleanup)
2440
 
    
2441
 
    for client in tcp_server.clients.itervalues():
 
3559
 
 
3560
    for client in tcp_server.clients.values():
2442
3561
        if use_dbus:
2443
 
            # Emit D-Bus signal
2444
 
            mandos_dbus_service.ClientAdded(client.dbus_object_path)
 
3562
            # Emit D-Bus signal for adding
 
3563
            mandos_dbus_service.client_added_signal(client)
2445
3564
        # Need to initiate checking of clients
2446
3565
        if client.enabled:
2447
3566
            client.init_checker()
2448
 
    
 
3567
 
2449
3568
    tcp_server.enable()
2450
3569
    tcp_server.server_activate()
2451
 
    
 
3570
 
2452
3571
    # Find out what port we got
2453
 
    service.port = tcp_server.socket.getsockname()[1]
 
3572
    if zeroconf:
 
3573
        service.port = tcp_server.socket.getsockname()[1]
2454
3574
    if use_ipv6:
2455
3575
        logger.info("Now listening on address %r, port %d,"
2456
 
                    " flowinfo %d, scope_id %d"
2457
 
                    % tcp_server.socket.getsockname())
 
3576
                    " flowinfo %d, scope_id %d",
 
3577
                    *tcp_server.socket.getsockname())
2458
3578
    else:                       # IPv4
2459
 
        logger.info("Now listening on address %r, port %d"
2460
 
                    % tcp_server.socket.getsockname())
2461
 
    
2462
 
    #service.interface = tcp_server.socket.getsockname()[3]
2463
 
    
 
3579
        logger.info("Now listening on address %r, port %d",
 
3580
                    *tcp_server.socket.getsockname())
 
3581
 
 
3582
    # service.interface = tcp_server.socket.getsockname()[3]
 
3583
 
2464
3584
    try:
2465
 
        # From the Avahi example code
2466
 
        try:
2467
 
            service.activate()
2468
 
        except dbus.exceptions.DBusException as error:
2469
 
            logger.critical("DBusException: %s", error)
2470
 
            cleanup()
2471
 
            sys.exit(1)
2472
 
        # End of Avahi example code
2473
 
        
2474
 
        gobject.io_add_watch(tcp_server.fileno(), gobject.IO_IN,
2475
 
                             lambda *args, **kwargs:
2476
 
                             (tcp_server.handle_request
2477
 
                              (*args[2:], **kwargs) or True))
2478
 
        
 
3585
        if zeroconf:
 
3586
            # From the Avahi example code
 
3587
            try:
 
3588
                service.activate()
 
3589
            except dbus.exceptions.DBusException as error:
 
3590
                logger.critical("D-Bus Exception", exc_info=error)
 
3591
                cleanup()
 
3592
                sys.exit(1)
 
3593
            # End of Avahi example code
 
3594
 
 
3595
        GLib.io_add_watch(tcp_server.fileno(), GLib.IO_IN,
 
3596
                          lambda *args, **kwargs:
 
3597
                          (tcp_server.handle_request
 
3598
                           (*args[2:], **kwargs) or True))
 
3599
 
2479
3600
        logger.debug("Starting main loop")
2480
3601
        main_loop.run()
2481
3602
    except AvahiError as error:
2482
 
        logger.critical("AvahiError: %s", error)
 
3603
        logger.critical("Avahi Error", exc_info=error)
2483
3604
        cleanup()
2484
3605
        sys.exit(1)
2485
3606
    except KeyboardInterrupt:
2490
3611
    # Must run before the D-Bus bus name gets deregistered
2491
3612
    cleanup()
2492
3613
 
 
3614
 
2493
3615
if __name__ == '__main__':
2494
3616
    main()