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- Committer: Teddy Hogeborn
- Date: 2019-02-11 06:14:29 UTC
- Revision ID: teddy@recompile.se-20190211061429-n6n5zk29iatshlb3
Fix Debian package dependencies
* debian/control (Build-Depends): Changed GnuTLS dependencies to
"libgnutls30 (>= 3.3.0),
libgnutls28-dev (>= 3.6.6) |
libgnutls28-dev (<< 3.6.0)". (We
can't depend on the virtual package
"gnutls-dev", since we need the
version restrictions.)
(Package: mandos/Depends): Remove dependency on libgnutls28-dev
package.
(Package: mandos/Suggests): New; set to "libc6-dev,
c-compiler". (Used to find value of
"SO_BINDTODEVICE").
(Package: mandos-client/Depends): Don't depend on openssl anymore;
instead depend on either a
gnutls-bin (>= 3.6.6) (in which
case TLS key generation will
work), or on libgnutls30 (<<
3.6.0) (in which case TLS key
generation will not be needed).
* debian/control (Build-Depends): Changed GnuTLS dependencies to
"libgnutls30 (>= 3.3.0),
libgnutls28-dev (>= 3.6.6) |
libgnutls28-dev (<< 3.6.0)". (We
can't depend on the virtual package
"gnutls-dev", since we need the
version restrictions.)
(Package: mandos/Depends): Remove dependency on libgnutls28-dev
package.
(Package: mandos/Suggests): New; set to "libc6-dev,
c-compiler". (Used to find value of
"SO_BINDTODEVICE").
(Package: mandos-client/Depends): Don't depend on openssl anymore;
instead depend on either a
gnutls-bin (>= 3.6.6) (in which
case TLS key generation will
work), or on libgnutls30 (<<
3.6.0) (in which case TLS key
generation will not be needed).
- files added:
- debian/mandos-client.templates
- files removed:
- initramfs-tools-hook-conf
- files modified:
- DBUS-API
added
removed
mandos
1
1
#!/usr/bin/python
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2
# -*- mode: python; coding: utf-8 -*-
3
#
3
#
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# Mandos server - give out binary blobs to connecting clients.
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#
5
#
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# This program is partly derived from an example program for an Avahi
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# service publisher, downloaded from
8
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# <http://avahi.org/wiki/PythonPublishExample>. This includes the
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# methods "add", "remove", "server_state_changed",
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# "entry_group_state_changed", "cleanup", and "activate" in the
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# "AvahiService" class, and some lines in "main".
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#
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#
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# Everything else is
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# Copyright © 2008-2016 Teddy Hogeborn
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# Copyright © 2008-2016 Björn Påhlsson
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#
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# 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
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# Copyright © 2008-2019 Teddy Hogeborn
15
# Copyright © 2008-2019 Björn Påhlsson
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#
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# This file is part of Mandos.
18
#
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# 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
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# (at your option) any later version.
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#
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# 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
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# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
25
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# GNU General Public License for more details.
26
#
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#
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# 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/>.
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#
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# along with Mandos. If not, see <http://www.gnu.org/licenses/>.
31
#
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# Contact the authors at <mandos@recompile.se>.
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#
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#
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from __future__ import (division, absolute_import, print_function,
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unicode_literals)
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import xml.dom.minidom
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import inspect
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# Try to find the value of SO_BINDTODEVICE:
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try:
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# This is where SO_BINDTODEVICE is in Python 3.3 (or 3.4?) and
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# newer, and it is also the most natural place for it:
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SO_BINDTODEVICE = socket.SO_BINDTODEVICE
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except AttributeError:
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try:
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# This is where SO_BINDTODEVICE was up to and including Python
98
# 2.6, and also 3.2:
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from IN import SO_BINDTODEVICE
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except ImportError:
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SO_BINDTODEVICE = None
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# In Python 2.7 it seems to have been removed entirely.
102
# Try running the C preprocessor:
103
try:
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cc = subprocess.Popen(["cc", "--language=c", "-E",
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"/dev/stdin"],
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stdin=subprocess.PIPE,
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stdout=subprocess.PIPE)
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stdout = cc.communicate(
109
"#include <sys/socket.h>\nSO_BINDTODEVICE\n")[0]
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SO_BINDTODEVICE = int(stdout.splitlines()[-1])
111
except (OSError, ValueError, IndexError):
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# No value found
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SO_BINDTODEVICE = None
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if sys.version_info.major == 2:
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str = unicode
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version = "1.7.7"
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version = "1.8.2"
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stored_state_file = "clients.pickle"
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logger = logging.getLogger()
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if_nametoindex = ctypes.cdll.LoadLibrary(
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ctypes.util.find_library("c")).if_nametoindex
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except (OSError, AttributeError):
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def if_nametoindex(interface):
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"Get an interface index the hard way, i.e. using fcntl()"
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SIOCGIFINDEX = 0x8933 # From /usr/include/linux/sockios.h
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def initlogger(debug, level=logging.WARNING):
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"""init logger and add loglevel"""
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global syslogger
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syslogger = (logging.handlers.SysLogHandler(
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facility = logging.handlers.SysLogHandler.LOG_DAEMON,
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address = "/dev/log"))
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facility=logging.handlers.SysLogHandler.LOG_DAEMON,
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address="/dev/log"))
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syslogger.setFormatter(logging.Formatter
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('Mandos [%(process)d]: %(levelname)s:'
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' %(message)s'))
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logger.addHandler(syslogger)
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if debug:
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console = logging.StreamHandler()
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console.setFormatter(logging.Formatter('%(asctime)s %(name)s'
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class PGPEngine(object):
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"""A simple class for OpenPGP symmetric encryption & decryption"""
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def __init__(self):
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self.tempdir = tempfile.mkdtemp(prefix="mandos-")
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self.gpg = "gpg"
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self.gnupgargs = ['--batch',
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'--homedir', self.tempdir,
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'--force-mdc',
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'--quiet',
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'--no-use-agent']
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'--quiet']
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# 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")
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def __enter__(self):
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return self
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def __exit__(self, exc_type, exc_value, traceback):
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self._cleanup()
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return False
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def __del__(self):
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self._cleanup()
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def _cleanup(self):
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if self.tempdir is not None:
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# Delete contents of tempdir
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for root, dirs, files in os.walk(self.tempdir,
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topdown = False):
220
topdown=False):
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for filename in files:
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os.remove(os.path.join(root, filename))
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for dirname in dirs:
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# Remove tempdir
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os.rmdir(self.tempdir)
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self.tempdir = None
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def password_encode(self, password):
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# Passphrase can not be empty and can not contain newlines or
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# NUL bytes. So we prefix it and hex encode it.
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.replace(b"\n", b"\\n")
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.replace(b"\0", b"\\x00"))
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return encoded
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def encrypt(self, data, password):
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passphrase = self.password_encode(password)
222
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with tempfile.NamedTemporaryFile(
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'--passphrase-file',
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passfile.name]
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+ self.gnupgargs,
230
stdin = subprocess.PIPE,
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stdout = subprocess.PIPE,
232
stderr = subprocess.PIPE)
233
ciphertext, err = proc.communicate(input = data)
250
stdin=subprocess.PIPE,
251
stdout=subprocess.PIPE,
252
stderr=subprocess.PIPE)
253
ciphertext, err = proc.communicate(input=data)
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if proc.returncode != 0:
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raise PGPError(err)
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return ciphertext
237
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238
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def decrypt(self, data, password):
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passphrase = self.password_encode(password)
240
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with tempfile.NamedTemporaryFile(
241
dir = self.tempdir) as passfile:
261
dir=self.tempdir) as passfile:
242
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passfile.write(passphrase)
243
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passfile.flush()
244
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proc = subprocess.Popen([self.gpg, '--decrypt',
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'--passphrase-file',
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passfile.name]
247
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+ self.gnupgargs,
248
stdin = subprocess.PIPE,
249
stdout = subprocess.PIPE,
250
stderr = subprocess.PIPE)
251
decrypted_plaintext, err = proc.communicate(input = data)
268
stdin=subprocess.PIPE,
269
stdout=subprocess.PIPE,
270
stderr=subprocess.PIPE)
271
decrypted_plaintext, err = proc.communicate(input=data)
252
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if proc.returncode != 0:
253
273
raise PGPError(err)
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return decrypted_plaintext
255
275
276
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# Pretend that we have an Avahi module
257
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class Avahi(object):
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"""This isn't so much a class as it is a module-like namespace.
259
280
It is instantiated once, and simulates having an Avahi module."""
260
IF_UNSPEC = -1 # avahi-common/address.h
261
PROTO_UNSPEC = -1 # avahi-common/address.h
262
PROTO_INET = 0 # avahi-common/address.h
263
PROTO_INET6 = 1 # avahi-common/address.h
281
IF_UNSPEC = -1 # avahi-common/address.h
282
PROTO_UNSPEC = -1 # avahi-common/address.h
283
PROTO_INET = 0 # avahi-common/address.h
284
PROTO_INET6 = 1 # avahi-common/address.h
264
285
DBUS_NAME = "org.freedesktop.Avahi"
265
286
DBUS_INTERFACE_ENTRY_GROUP = DBUS_NAME + ".EntryGroup"
266
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DBUS_INTERFACE_SERVER = DBUS_NAME + ".Server"
267
288
DBUS_PATH_SERVER = "/"
289
268
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def string_array_to_txt_array(self, t):
269
291
return dbus.Array((dbus.ByteArray(s.encode("utf-8"))
270
292
for s in t), signature="ay")
271
ENTRY_GROUP_ESTABLISHED = 2 # avahi-common/defs.h
272
ENTRY_GROUP_COLLISION = 3 # avahi-common/defs.h
273
ENTRY_GROUP_FAILURE = 4 # avahi-common/defs.h
274
SERVER_INVALID = 0 # avahi-common/defs.h
275
SERVER_REGISTERING = 1 # avahi-common/defs.h
276
SERVER_RUNNING = 2 # avahi-common/defs.h
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SERVER_COLLISION = 3 # avahi-common/defs.h
278
SERVER_FAILURE = 4 # avahi-common/defs.h
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
279
301
avahi = Avahi()
280
302
303
281
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class AvahiError(Exception):
282
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def __init__(self, value, *args, **kwargs):
283
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self.value = value
295
318
296
319
class AvahiService(object):
297
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"""An Avahi (Zeroconf) service.
298
321
299
322
Attributes:
300
323
interface: integer; avahi.IF_UNSPEC or an interface index.
301
324
Used to optionally bind to the specified interface.
313
336
server: D-Bus Server
314
337
bus: dbus.SystemBus()
315
338
"""
316
339
317
340
def __init__(self,
318
interface = avahi.IF_UNSPEC,
319
name = None,
320
servicetype = None,
321
port = None,
322
TXT = None,
323
domain = "",
324
host = "",
325
max_renames = 32768,
326
protocol = avahi.PROTO_UNSPEC,
327
bus = None):
341
interface=avahi.IF_UNSPEC,
342
name=None,
343
servicetype=None,
344
port=None,
345
TXT=None,
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domain="",
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host="",
348
max_renames=32768,
349
protocol=avahi.PROTO_UNSPEC,
350
bus=None):
328
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self.interface = interface
329
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self.name = name
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self.type = servicetype
339
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self.server = None
340
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self.bus = bus
341
364
self.entry_group_state_changed_match = None
342
365
343
366
def rename(self, remove=True):
344
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"""Derived from the Avahi example code"""
345
368
if self.rename_count >= self.max_renames:
365
388
logger.critical("D-Bus Exception", exc_info=error)
366
389
self.cleanup()
367
390
os._exit(1)
368
391
369
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def remove(self):
370
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"""Derived from the Avahi example code"""
371
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if self.entry_group_state_changed_match is not None:
373
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self.entry_group_state_changed_match = None
374
397
if self.group is not None:
375
398
self.group.Reset()
376
399
377
400
def add(self):
378
401
"""Derived from the Avahi example code"""
379
402
self.remove()
396
419
dbus.UInt16(self.port),
397
420
avahi.string_array_to_txt_array(self.TXT))
398
421
self.group.Commit()
399
422
400
423
def entry_group_state_changed(self, state, error):
401
424
"""Derived from the Avahi example code"""
402
425
logger.debug("Avahi entry group state change: %i", state)
403
426
404
427
if state == avahi.ENTRY_GROUP_ESTABLISHED:
405
428
logger.debug("Zeroconf service established.")
406
429
elif state == avahi.ENTRY_GROUP_COLLISION:
410
433
logger.critical("Avahi: Error in group state changed %s",
411
434
str(error))
412
435
raise AvahiGroupError("State changed: {!s}".format(error))
413
436
414
437
def cleanup(self):
415
438
"""Derived from the Avahi example code"""
416
439
if self.group is not None:
421
444
pass
422
445
self.group = None
423
446
self.remove()
424
447
425
448
def server_state_changed(self, state, error=None):
426
449
"""Derived from the Avahi example code"""
427
450
logger.debug("Avahi server state change: %i", state)
456
479
logger.debug("Unknown state: %r", state)
457
480
else:
458
481
logger.debug("Unknown state: %r: %r", state, error)
459
482
460
483
def activate(self):
461
484
"""Derived from the Avahi example code"""
462
485
if self.server is None:
473
496
class AvahiServiceToSyslog(AvahiService):
474
497
def rename(self, *args, **kwargs):
475
498
"""Add the new name to the syslog messages"""
476
ret = AvahiService.rename(self, *args, **kwargs)
499
ret = super(AvahiServiceToSyslog, self).rename(*args, **kwargs)
477
500
syslogger.setFormatter(logging.Formatter(
478
501
'Mandos ({}) [%(process)d]: %(levelname)s: %(message)s'
479
502
.format(self.name)))
480
503
return ret
481
504
505
482
506
# Pretend that we have a GnuTLS module
483
507
class GnuTLS(object):
484
508
"""This isn't so much a class as it is a module-like namespace.
485
509
It is instantiated once, and simulates having a GnuTLS module."""
486
487
_library = ctypes.cdll.LoadLibrary(
488
ctypes.util.find_library("gnutls"))
510
511
library = ctypes.util.find_library("gnutls")
512
if library is None:
513
library = ctypes.util.find_library("gnutls-deb0")
514
_library = ctypes.cdll.LoadLibrary(library)
515
del library
489
516
_need_version = b"3.3.0"
517
_tls_rawpk_version = b"3.6.6"
518
490
519
def __init__(self):
491
# Need to use class name "GnuTLS" here, since this method is
492
# called before the assignment to the "gnutls" global variable
493
# happens.
494
if GnuTLS.check_version(self._need_version) is None:
495
raise GnuTLS.Error("Needs GnuTLS {} or later"
496
.format(self._need_version))
497
520
# Need to use "self" here, since this method is called before
521
# the assignment to the "gnutls" global variable happens.
522
if self.check_version(self._need_version) is None:
523
raise self.Error("Needs GnuTLS {} or later"
524
.format(self._need_version))
525
498
526
# Unless otherwise indicated, the constants and types below are
499
527
# all from the gnutls/gnutls.h C header file.
500
528
501
529
# Constants
502
530
E_SUCCESS = 0
503
531
E_INTERRUPTED = -52
504
532
E_AGAIN = -28
505
533
CRT_OPENPGP = 2
534
CRT_RAWPK = 3
506
535
CLIENT = 2
507
536
SHUT_RDWR = 0
508
537
CRD_CERTIFICATE = 1
509
538
E_NO_CERTIFICATE_FOUND = -49
539
X509_FMT_DER = 0
540
NO_TICKETS = 1<<10
541
ENABLE_RAWPK = 1<<18
542
CTYPE_PEERS = 3
543
KEYID_USE_SHA256 = 1 # gnutls/x509.h
510
544
OPENPGP_FMT_RAW = 0 # gnutls/openpgp.h
511
545
512
546
# Types
513
547
class session_int(ctypes.Structure):
514
548
_fields_ = []
515
549
session_t = ctypes.POINTER(session_int)
550
516
551
class certificate_credentials_st(ctypes.Structure):
517
552
_fields_ = []
518
553
certificate_credentials_t = ctypes.POINTER(
519
554
certificate_credentials_st)
520
555
certificate_type_t = ctypes.c_int
556
521
557
class datum_t(ctypes.Structure):
522
558
_fields_ = [('data', ctypes.POINTER(ctypes.c_ubyte)),
523
559
('size', ctypes.c_uint)]
560
524
561
class openpgp_crt_int(ctypes.Structure):
525
562
_fields_ = []
526
563
openpgp_crt_t = ctypes.POINTER(openpgp_crt_int)
527
openpgp_crt_fmt_t = ctypes.c_int # gnutls/openpgp.h
564
openpgp_crt_fmt_t = ctypes.c_int # gnutls/openpgp.h
528
565
log_func = ctypes.CFUNCTYPE(None, ctypes.c_int, ctypes.c_char_p)
529
566
credentials_type_t = ctypes.c_int
530
567
transport_ptr_t = ctypes.c_void_p
531
568
close_request_t = ctypes.c_int
532
569
533
570
# Exceptions
534
571
class Error(Exception):
535
572
# We need to use the class name "GnuTLS" here, since this
536
573
# exception might be raised from within GnuTLS.__init__,
537
574
# which is called before the assignment to the "gnutls"
538
575
# global variable has happened.
539
def __init__(self, message = None, code = None, args=()):
576
def __init__(self, message=None, code=None, args=()):
540
577
# Default usage is by a message string, but if a return
541
578
# code is passed, convert it to a string with
542
579
# gnutls.strerror()
545
582
message = GnuTLS.strerror(code)
546
583
return super(GnuTLS.Error, self).__init__(
547
584
message, *args)
548
585
549
586
class CertificateSecurityError(Error):
550
587
pass
551
588
552
589
# Classes
553
590
class Credentials(object):
554
591
def __init__(self):
556
593
gnutls.certificate_allocate_credentials(
557
594
ctypes.byref(self._c_object))
558
595
self.type = gnutls.CRD_CERTIFICATE
559
596
560
597
def __del__(self):
561
598
gnutls.certificate_free_credentials(self._c_object)
562
599
563
600
class ClientSession(object):
564
def __init__(self, socket, credentials = None):
601
def __init__(self, socket, credentials=None):
565
602
self._c_object = gnutls.session_t()
566
gnutls.init(ctypes.byref(self._c_object), gnutls.CLIENT)
603
gnutls_flags = gnutls.CLIENT
604
if gnutls.check_version("3.5.6"):
605
gnutls_flags |= gnutls.NO_TICKETS
606
if gnutls.has_rawpk:
607
gnutls_flags |= gnutls.ENABLE_RAWPK
608
gnutls.init(ctypes.byref(self._c_object), gnutls_flags)
609
del gnutls_flags
567
610
gnutls.set_default_priority(self._c_object)
568
611
gnutls.transport_set_ptr(self._c_object, socket.fileno())
569
612
gnutls.handshake_set_private_extensions(self._c_object,
575
618
ctypes.cast(credentials._c_object,
576
619
ctypes.c_void_p))
577
620
self.credentials = credentials
578
621
579
622
def __del__(self):
580
623
gnutls.deinit(self._c_object)
581
624
582
625
def handshake(self):
583
626
return gnutls.handshake(self._c_object)
584
627
585
628
def send(self, data):
586
629
data = bytes(data)
587
630
data_len = len(data)
589
632
data_len -= gnutls.record_send(self._c_object,
590
633
data[-data_len:],
591
634
data_len)
592
635
593
636
def bye(self):
594
637
return gnutls.bye(self._c_object, gnutls.SHUT_RDWR)
595
638
596
639
# Error handling functions
597
640
def _error_code(result):
598
641
"""A function to raise exceptions on errors, suitable
600
643
if result >= 0:
601
644
return result
602
645
if result == gnutls.E_NO_CERTIFICATE_FOUND:
603
raise gnutls.CertificateSecurityError(code = result)
604
raise gnutls.Error(code = result)
605
646
raise gnutls.CertificateSecurityError(code=result)
647
raise gnutls.Error(code=result)
648
606
649
def _retry_on_error(result, func, arguments):
607
650
"""A function to retry on some errors, suitable
608
651
for the 'errcheck' attribute on ctypes functions"""
611
654
return _error_code(result)
612
655
result = func(*arguments)
613
656
return result
614
657
615
658
# Unless otherwise indicated, the function declarations below are
616
659
# all from the gnutls/gnutls.h C header file.
617
660
618
661
# Functions
619
662
priority_set_direct = _library.gnutls_priority_set_direct
620
663
priority_set_direct.argtypes = [session_t, ctypes.c_char_p,
621
664
ctypes.POINTER(ctypes.c_char_p)]
622
665
priority_set_direct.restype = _error_code
623
666
624
667
init = _library.gnutls_init
625
668
init.argtypes = [ctypes.POINTER(session_t), ctypes.c_int]
626
669
init.restype = _error_code
627
670
628
671
set_default_priority = _library.gnutls_set_default_priority
629
672
set_default_priority.argtypes = [session_t]
630
673
set_default_priority.restype = _error_code
631
674
632
675
record_send = _library.gnutls_record_send
633
676
record_send.argtypes = [session_t, ctypes.c_void_p,
634
677
ctypes.c_size_t]
635
678
record_send.restype = ctypes.c_ssize_t
636
679
record_send.errcheck = _retry_on_error
637
680
638
681
certificate_allocate_credentials = (
639
682
_library.gnutls_certificate_allocate_credentials)
640
683
certificate_allocate_credentials.argtypes = [
641
684
ctypes.POINTER(certificate_credentials_t)]
642
685
certificate_allocate_credentials.restype = _error_code
643
686
644
687
certificate_free_credentials = (
645
688
_library.gnutls_certificate_free_credentials)
646
certificate_free_credentials.argtypes = [certificate_credentials_t]
689
certificate_free_credentials.argtypes = [
690
certificate_credentials_t]
647
691
certificate_free_credentials.restype = None
648
692
649
693
handshake_set_private_extensions = (
650
694
_library.gnutls_handshake_set_private_extensions)
651
695
handshake_set_private_extensions.argtypes = [session_t,
652
696
ctypes.c_int]
653
697
handshake_set_private_extensions.restype = None
654
698
655
699
credentials_set = _library.gnutls_credentials_set
656
700
credentials_set.argtypes = [session_t, credentials_type_t,
657
701
ctypes.c_void_p]
658
702
credentials_set.restype = _error_code
659
703
660
704
strerror = _library.gnutls_strerror
661
705
strerror.argtypes = [ctypes.c_int]
662
706
strerror.restype = ctypes.c_char_p
663
707
664
708
certificate_type_get = _library.gnutls_certificate_type_get
665
709
certificate_type_get.argtypes = [session_t]
666
710
certificate_type_get.restype = _error_code
667
711
668
712
certificate_get_peers = _library.gnutls_certificate_get_peers
669
713
certificate_get_peers.argtypes = [session_t,
670
714
ctypes.POINTER(ctypes.c_uint)]
671
715
certificate_get_peers.restype = ctypes.POINTER(datum_t)
672
716
673
717
global_set_log_level = _library.gnutls_global_set_log_level
674
718
global_set_log_level.argtypes = [ctypes.c_int]
675
719
global_set_log_level.restype = None
676
720
677
721
global_set_log_function = _library.gnutls_global_set_log_function
678
722
global_set_log_function.argtypes = [log_func]
679
723
global_set_log_function.restype = None
680
724
681
725
deinit = _library.gnutls_deinit
682
726
deinit.argtypes = [session_t]
683
727
deinit.restype = None
684
728
685
729
handshake = _library.gnutls_handshake
686
730
handshake.argtypes = [session_t]
687
731
handshake.restype = _error_code
688
732
handshake.errcheck = _retry_on_error
689
733
690
734
transport_set_ptr = _library.gnutls_transport_set_ptr
691
735
transport_set_ptr.argtypes = [session_t, transport_ptr_t]
692
736
transport_set_ptr.restype = None
693
737
694
738
bye = _library.gnutls_bye
695
739
bye.argtypes = [session_t, close_request_t]
696
740
bye.restype = _error_code
697
741
bye.errcheck = _retry_on_error
698
742
699
743
check_version = _library.gnutls_check_version
700
744
check_version.argtypes = [ctypes.c_char_p]
701
745
check_version.restype = ctypes.c_char_p
702
703
# All the function declarations below are from gnutls/openpgp.h
704
705
openpgp_crt_init = _library.gnutls_openpgp_crt_init
706
openpgp_crt_init.argtypes = [ctypes.POINTER(openpgp_crt_t)]
707
openpgp_crt_init.restype = _error_code
708
709
openpgp_crt_import = _library.gnutls_openpgp_crt_import
710
openpgp_crt_import.argtypes = [openpgp_crt_t,
711
ctypes.POINTER(datum_t),
712
openpgp_crt_fmt_t]
713
openpgp_crt_import.restype = _error_code
714
715
openpgp_crt_verify_self = _library.gnutls_openpgp_crt_verify_self
716
openpgp_crt_verify_self.argtypes = [openpgp_crt_t, ctypes.c_uint,
717
ctypes.POINTER(ctypes.c_uint)]
718
openpgp_crt_verify_self.restype = _error_code
719
720
openpgp_crt_deinit = _library.gnutls_openpgp_crt_deinit
721
openpgp_crt_deinit.argtypes = [openpgp_crt_t]
722
openpgp_crt_deinit.restype = None
723
724
openpgp_crt_get_fingerprint = (
725
_library.gnutls_openpgp_crt_get_fingerprint)
726
openpgp_crt_get_fingerprint.argtypes = [openpgp_crt_t,
727
ctypes.c_void_p,
728
ctypes.POINTER(
729
ctypes.c_size_t)]
730
openpgp_crt_get_fingerprint.restype = _error_code
731
746
747
has_rawpk = bool(check_version(_tls_rawpk_version))
748
749
if has_rawpk:
750
# Types
751
class pubkey_st(ctypes.Structure):
752
_fields = []
753
pubkey_t = ctypes.POINTER(pubkey_st)
754
755
x509_crt_fmt_t = ctypes.c_int
756
757
# All the function declarations below are from gnutls/abstract.h
758
pubkey_init = _library.gnutls_pubkey_init
759
pubkey_init.argtypes = [ctypes.POINTER(pubkey_t)]
760
pubkey_init.restype = _error_code
761
762
pubkey_import = _library.gnutls_pubkey_import
763
pubkey_import.argtypes = [pubkey_t, ctypes.POINTER(datum_t),
764
x509_crt_fmt_t]
765
pubkey_import.restype = _error_code
766
767
pubkey_get_key_id = _library.gnutls_pubkey_get_key_id
768
pubkey_get_key_id.argtypes = [pubkey_t, ctypes.c_int,
769
ctypes.POINTER(ctypes.c_ubyte),
770
ctypes.POINTER(ctypes.c_size_t)]
771
pubkey_get_key_id.restype = _error_code
772
773
pubkey_deinit = _library.gnutls_pubkey_deinit
774
pubkey_deinit.argtypes = [pubkey_t]
775
pubkey_deinit.restype = None
776
else:
777
# All the function declarations below are from gnutls/openpgp.h
778
779
openpgp_crt_init = _library.gnutls_openpgp_crt_init
780
openpgp_crt_init.argtypes = [ctypes.POINTER(openpgp_crt_t)]
781
openpgp_crt_init.restype = _error_code
782
783
openpgp_crt_import = _library.gnutls_openpgp_crt_import
784
openpgp_crt_import.argtypes = [openpgp_crt_t,
785
ctypes.POINTER(datum_t),
786
openpgp_crt_fmt_t]
787
openpgp_crt_import.restype = _error_code
788
789
openpgp_crt_verify_self = _library.gnutls_openpgp_crt_verify_self
790
openpgp_crt_verify_self.argtypes = [openpgp_crt_t, ctypes.c_uint,
791
ctypes.POINTER(ctypes.c_uint)]
792
openpgp_crt_verify_self.restype = _error_code
793
794
openpgp_crt_deinit = _library.gnutls_openpgp_crt_deinit
795
openpgp_crt_deinit.argtypes = [openpgp_crt_t]
796
openpgp_crt_deinit.restype = None
797
798
openpgp_crt_get_fingerprint = (
799
_library.gnutls_openpgp_crt_get_fingerprint)
800
openpgp_crt_get_fingerprint.argtypes = [openpgp_crt_t,
801
ctypes.c_void_p,
802
ctypes.POINTER(
803
ctypes.c_size_t)]
804
openpgp_crt_get_fingerprint.restype = _error_code
805
806
if check_version("3.6.4"):
807
certificate_type_get2 = _library.gnutls_certificate_type_get2
808
certificate_type_get2.argtypes = [session_t, ctypes.c_int]
809
certificate_type_get2.restype = _error_code
810
732
811
# Remove non-public functions
733
812
del _error_code, _retry_on_error
734
813
# Create the global "gnutls" object, simulating a module
735
814
gnutls = GnuTLS()
736
815
816
737
817
def call_pipe(connection, # : multiprocessing.Connection
738
818
func, *args, **kwargs):
739
819
"""This function is meant to be called by multiprocessing.Process
740
820
741
821
This function runs func(*args, **kwargs), and writes the resulting
742
822
return value on the provided multiprocessing.Connection.
743
823
"""
744
824
connection.send(func(*args, **kwargs))
745
825
connection.close()
746
826
827
747
828
class Client(object):
748
829
"""A representation of a client host served by this server.
749
830
750
831
Attributes:
751
832
approved: bool(); 'None' if not yet approved/disapproved
752
833
approval_delay: datetime.timedelta(); Time to wait for approval
767
848
disable_initiator_tag: a GLib event source tag, or None
768
849
enabled: bool()
769
850
fingerprint: string (40 or 32 hexadecimal digits); used to
770
uniquely identify the client
851
uniquely identify an OpenPGP client
852
key_id: string (64 hexadecimal digits); used to uniquely identify
853
a client using raw public keys
771
854
host: string; available for use by the checker command
772
855
interval: datetime.timedelta(); How often to start a new checker
773
856
last_approval_request: datetime.datetime(); (UTC) or None
789
872
disabled, or None
790
873
server_settings: The server_settings dict from main()
791
874
"""
792
875
793
876
runtime_expansions = ("approval_delay", "approval_duration",
794
"created", "enabled", "expires",
877
"created", "enabled", "expires", "key_id",
795
878
"fingerprint", "host", "interval",
796
879
"last_approval_request", "last_checked_ok",
797
880
"last_enabled", "name", "timeout")
806
889
"approved_by_default": "True",
807
890
"enabled": "True",
808
891
}
809
892
810
893
@staticmethod
811
894
def config_parser(config):
812
895
"""Construct a new dict of client settings of this form:
819
902
for client_name in config.sections():
820
903
section = dict(config.items(client_name))
821
904
client = settings[client_name] = {}
822
905
823
906
client["host"] = section["host"]
824
907
# Reformat values from string types to Python types
825
908
client["approved_by_default"] = config.getboolean(
826
909
client_name, "approved_by_default")
827
910
client["enabled"] = config.getboolean(client_name,
828
911
"enabled")
829
830
# Uppercase and remove spaces from fingerprint for later
831
# comparison purposes with return value from the
832
# fingerprint() function
912
913
# Uppercase and remove spaces from key_id and fingerprint
914
# for later comparison purposes with return value from the
915
# key_id() and fingerprint() functions
916
client["key_id"] = (section.get("key_id", "").upper()
917
.replace(" ", ""))
833
918
client["fingerprint"] = (section["fingerprint"].upper()
834
919
.replace(" ", ""))
835
920
if "secret" in section:
856
941
client["last_approval_request"] = None
857
942
client["last_checked_ok"] = None
858
943
client["last_checker_status"] = -2
859
944
860
945
return settings
861
862
def __init__(self, settings, name = None, server_settings=None):
946
947
def __init__(self, settings, name=None, server_settings=None):
863
948
self.name = name
864
949
if server_settings is None:
865
950
server_settings = {}
867
952
# adding all client settings
868
953
for setting, value in settings.items():
869
954
setattr(self, setting, value)
870
955
871
956
if self.enabled:
872
957
if not hasattr(self, "last_enabled"):
873
958
self.last_enabled = datetime.datetime.utcnow()
877
962
else:
878
963
self.last_enabled = None
879
964
self.expires = None
880
965
881
966
logger.debug("Creating client %r", self.name)
967
logger.debug(" Key ID: %s", self.key_id)
882
968
logger.debug(" Fingerprint: %s", self.fingerprint)
883
969
self.created = settings.get("created",
884
970
datetime.datetime.utcnow())
885
971
886
972
# attributes specific for this server instance
887
973
self.checker = None
888
974
self.checker_initiator_tag = None
897
983
for attr in self.__dict__.keys()
898
984
if not attr.startswith("_")]
899
985
self.client_structure.append("client_structure")
900
986
901
987
for name, t in inspect.getmembers(
902
988
type(self), lambda obj: isinstance(obj, property)):
903
989
if not name.startswith("_"):
904
990
self.client_structure.append(name)
905
991
906
992
# Send notice to process children that client state has changed
907
993
def send_changedstate(self):
908
994
with self.changedstate:
909
995
self.changedstate.notify_all()
910
996
911
997
def enable(self):
912
998
"""Start this client's checker and timeout hooks"""
913
999
if getattr(self, "enabled", False):
918
1004
self.last_enabled = datetime.datetime.utcnow()
919
1005
self.init_checker()
920
1006
self.send_changedstate()
921
1007
922
1008
def disable(self, quiet=True):
923
1009
"""Disable this client."""
924
1010
if not getattr(self, "enabled", False):
938
1024
self.send_changedstate()
939
1025
# Do not run this again if called by a GLib.timeout_add
940
1026
return False
941
1027
942
1028
def __del__(self):
943
1029
self.disable()
944
1030
945
1031
def init_checker(self):
946
1032
# Schedule a new checker to be started an 'interval' from now,
947
1033
# and every interval from then on.
957
1043
int(self.timeout.total_seconds() * 1000), self.disable)
958
1044
# Also start a new checker *right now*.
959
1045
self.start_checker()
960
1046
961
1047
def checker_callback(self, source, condition, connection,
962
1048
command):
963
1049
"""The checker has completed, so take appropriate actions."""
966
1052
# Read return code from connection (see call_pipe)
967
1053
returncode = connection.recv()
968
1054
connection.close()
969
1055
970
1056
if returncode >= 0:
971
1057
self.last_checker_status = returncode
972
1058
self.last_checker_signal = None
982
1068
logger.warning("Checker for %(name)s crashed?",
983
1069
vars(self))
984
1070
return False
985
1071
986
1072
def checked_ok(self):
987
1073
"""Assert that the client has been seen, alive and well."""
988
1074
self.last_checked_ok = datetime.datetime.utcnow()
989
1075
self.last_checker_status = 0
990
1076
self.last_checker_signal = None
991
1077
self.bump_timeout()
992
1078
993
1079
def bump_timeout(self, timeout=None):
994
1080
"""Bump up the timeout for this client."""
995
1081
if timeout is None:
1001
1087
self.disable_initiator_tag = GLib.timeout_add(
1002
1088
int(timeout.total_seconds() * 1000), self.disable)
1003
1089
self.expires = datetime.datetime.utcnow() + timeout
1004
1090
1005
1091
def need_approval(self):
1006
1092
self.last_approval_request = datetime.datetime.utcnow()
1007
1093
1008
1094
def start_checker(self):
1009
1095
"""Start a new checker subprocess if one is not running.
1010
1096
1011
1097
If a checker already exists, leave it running and do
1012
1098
nothing."""
1013
1099
# The reason for not killing a running checker is that if we
1018
1104
# checkers alone, the checker would have to take more time
1019
1105
# than 'timeout' for the client to be disabled, which is as it
1020
1106
# should be.
1021
1107
1022
1108
if self.checker is not None and not self.checker.is_alive():
1023
1109
logger.warning("Checker was not alive; joining")
1024
1110
self.checker.join()
1028
1114
# Escape attributes for the shell
1029
1115
escaped_attrs = {
1030
1116
attr: re.escape(str(getattr(self, attr)))
1031
for attr in self.runtime_expansions }
1117
for attr in self.runtime_expansions}
1032
1118
try:
1033
1119
command = self.checker_command % escaped_attrs
1034
1120
except TypeError as error:
1046
1132
# The exception is when not debugging but nevertheless
1047
1133
# running in the foreground; use the previously
1048
1134
# created wnull.
1049
popen_args = { "close_fds": True,
1050
"shell": True,
1051
"cwd": "/" }
1135
popen_args = {"close_fds": True,
1136
"shell": True,
1137
"cwd": "/"}
1052
1138
if (not self.server_settings["debug"]
1053
1139
and self.server_settings["foreground"]):
1054
1140
popen_args.update({"stdout": wnull,
1055
"stderr": wnull })
1056
pipe = multiprocessing.Pipe(duplex = False)
1141
"stderr": wnull})
1142
pipe = multiprocessing.Pipe(duplex=False)
1057
1143
self.checker = multiprocessing.Process(
1058
target = call_pipe,
1059
args = (pipe[1], subprocess.call, command),
1060
kwargs = popen_args)
1144
target=call_pipe,
1145
args=(pipe[1], subprocess.call, command),
1146
kwargs=popen_args)
1061
1147
self.checker.start()
1062
1148
self.checker_callback_tag = GLib.io_add_watch(
1063
1149
pipe[0].fileno(), GLib.IO_IN,
1064
1150
self.checker_callback, pipe[0], command)
1065
1151
# Re-run this periodically if run by GLib.timeout_add
1066
1152
return True
1067
1153
1068
1154
def stop_checker(self):
1069
1155
"""Force the checker process, if any, to stop."""
1070
1156
if self.checker_callback_tag:
1083
1169
byte_arrays=False):
1084
1170
"""Decorators for marking methods of a DBusObjectWithProperties to
1085
1171
become properties on the D-Bus.
1086
1172
1087
1173
The decorated method will be called with no arguments by "Get"
1088
1174
and with one argument by "Set".
1089
1175
1090
1176
The parameters, where they are supported, are the same as
1091
1177
dbus.service.method, except there is only "signature", since the
1092
1178
type from Get() and the type sent to Set() is the same.
1096
1182
if byte_arrays and signature != "ay":
1097
1183
raise ValueError("Byte arrays not supported for non-'ay'"
1098
1184
" signature {!r}".format(signature))
1099
1185
1100
1186
def decorator(func):
1101
1187
func._dbus_is_property = True
1102
1188
func._dbus_interface = dbus_interface
1105
1191
func._dbus_name = func.__name__
1106
1192
if func._dbus_name.endswith("_dbus_property"):
1107
1193
func._dbus_name = func._dbus_name[:-14]
1108
func._dbus_get_args_options = {'byte_arrays': byte_arrays }
1194
func._dbus_get_args_options = {'byte_arrays': byte_arrays}
1109
1195
return func
1110
1196
1111
1197
return decorator
1112
1198
1113
1199
1114
1200
def dbus_interface_annotations(dbus_interface):
1115
1201
"""Decorator for marking functions returning interface annotations
1116
1202
1117
1203
Usage:
1118
1204
1119
1205
@dbus_interface_annotations("org.example.Interface")
1120
1206
def _foo(self): # Function name does not matter
1121
1207
return {"org.freedesktop.DBus.Deprecated": "true",
1122
1208
"org.freedesktop.DBus.Property.EmitsChangedSignal":
1123
1209
"false"}
1124
1210
"""
1125
1211
1126
1212
def decorator(func):
1127
1213
func._dbus_is_interface = True
1128
1214
func._dbus_interface = dbus_interface
1129
1215
func._dbus_name = dbus_interface
1130
1216
return func
1131
1217
1132
1218
return decorator
1133
1219
1134
1220
1135
1221
def dbus_annotations(annotations):
1136
1222
"""Decorator to annotate D-Bus methods, signals or properties
1137
1223
Usage:
1138
1224
1139
1225
@dbus_annotations({"org.freedesktop.DBus.Deprecated": "true",
1140
1226
"org.freedesktop.DBus.Property."
1141
1227
"EmitsChangedSignal": "false"})
1143
1229
access="r")
1144
1230
def Property_dbus_property(self):
1145
1231
return dbus.Boolean(False)
1146
1232
1147
1233
See also the DBusObjectWithAnnotations class.
1148
1234
"""
1149
1235
1150
1236
def decorator(func):
1151
1237
func._dbus_annotations = annotations
1152
1238
return func
1153
1239
1154
1240
return decorator
1155
1241
1156
1242
1174
1260
1175
1261
class DBusObjectWithAnnotations(dbus.service.Object):
1176
1262
"""A D-Bus object with annotations.
1177
1263
1178
1264
Classes inheriting from this can use the dbus_annotations
1179
1265
decorator to add annotations to methods or signals.
1180
1266
"""
1181
1267
1182
1268
@staticmethod
1183
1269
def _is_dbus_thing(thing):
1184
1270
"""Returns a function testing if an attribute is a D-Bus thing
1185
1271
1186
1272
If called like _is_dbus_thing("method") it returns a function
1187
1273
suitable for use as predicate to inspect.getmembers().
1188
1274
"""
1189
1275
return lambda obj: getattr(obj, "_dbus_is_{}".format(thing),
1190
1276
False)
1191
1277
1192
1278
def _get_all_dbus_things(self, thing):
1193
1279
"""Returns a generator of (name, attribute) pairs
1194
1280
"""
1197
1283
for cls in self.__class__.__mro__
1198
1284
for name, athing in
1199
1285
inspect.getmembers(cls, self._is_dbus_thing(thing)))
1200
1286
1201
1287
@dbus.service.method(dbus.INTROSPECTABLE_IFACE,
1202
out_signature = "s",
1203
path_keyword = 'object_path',
1204
connection_keyword = 'connection')
1288
out_signature="s",
1289
path_keyword='object_path',
1290
connection_keyword='connection')
1205
1291
def Introspect(self, object_path, connection):
1206
1292
"""Overloading of standard D-Bus method.
1207
1293
1208
1294
Inserts annotation tags on methods and signals.
1209
1295
"""
1210
1296
xmlstring = dbus.service.Object.Introspect(self, object_path,
1211
1297
connection)
1212
1298
try:
1213
1299
document = xml.dom.minidom.parseString(xmlstring)
1214
1300
1215
1301
for if_tag in document.getElementsByTagName("interface"):
1216
1302
# Add annotation tags
1217
1303
for typ in ("method", "signal"):
1244
1330
if_tag.appendChild(ann_tag)
1245
1331
# Fix argument name for the Introspect method itself
1246
1332
if (if_tag.getAttribute("name")
1247
== dbus.INTROSPECTABLE_IFACE):
1333
== dbus.INTROSPECTABLE_IFACE):
1248
1334
for cn in if_tag.getElementsByTagName("method"):
1249
1335
if cn.getAttribute("name") == "Introspect":
1250
1336
for arg in cn.getElementsByTagName("arg"):
1263
1349
1264
1350
class DBusObjectWithProperties(DBusObjectWithAnnotations):
1265
1351
"""A D-Bus object with properties.
1266
1352
1267
1353
Classes inheriting from this can use the dbus_service_property
1268
1354
decorator to expose methods as D-Bus properties. It exposes the
1269
1355
standard Get(), Set(), and GetAll() methods on the D-Bus.
1270
1356
"""
1271
1357
1272
1358
def _get_dbus_property(self, interface_name, property_name):
1273
1359
"""Returns a bound method if one exists which is a D-Bus
1274
1360
property with the specified name and interface.
1279
1365
if (value._dbus_name == property_name
1280
1366
and value._dbus_interface == interface_name):
1281
1367
return value.__get__(self)
1282
1368
1283
1369
# No such property
1284
1370
raise DBusPropertyNotFound("{}:{}.{}".format(
1285
1371
self.dbus_object_path, interface_name, property_name))
1286
1372
1287
1373
@classmethod
1288
1374
def _get_all_interface_names(cls):
1289
1375
"""Get a sequence of all interfaces supported by an object"""
1292
1378
for x in (inspect.getmro(cls))
1293
1379
for attr in dir(x))
1294
1380
if name is not None)
1295
1381
1296
1382
@dbus.service.method(dbus.PROPERTIES_IFACE,
1297
1383
in_signature="ss",
1298
1384
out_signature="v")
1306
1392
if not hasattr(value, "variant_level"):
1307
1393
return value
1308
1394
return type(value)(value, variant_level=value.variant_level+1)
1309
1395
1310
1396
@dbus.service.method(dbus.PROPERTIES_IFACE, in_signature="ssv")
1311
1397
def Set(self, interface_name, property_name, value):
1312
1398
"""Standard D-Bus property Set() method, see D-Bus standard.
1324
1410
value = dbus.ByteArray(b''.join(chr(byte)
1325
1411
for byte in value))
1326
1412
prop(value)
1327
1413
1328
1414
@dbus.service.method(dbus.PROPERTIES_IFACE,
1329
1415
in_signature="s",
1330
1416
out_signature="a{sv}")
1331
1417
def GetAll(self, interface_name):
1332
1418
"""Standard D-Bus property GetAll() method, see D-Bus
1333
1419
standard.
1334
1420
1335
1421
Note: Will not include properties with access="write".
1336
1422
"""
1337
1423
properties = {}
1348
1434
properties[name] = value
1349
1435
continue
1350
1436
properties[name] = type(value)(
1351
value, variant_level = value.variant_level + 1)
1437
value, variant_level=value.variant_level + 1)
1352
1438
return dbus.Dictionary(properties, signature="sv")
1353
1439
1354
1440
@dbus.service.signal(dbus.PROPERTIES_IFACE, signature="sa{sv}as")
1355
1441
def PropertiesChanged(self, interface_name, changed_properties,
1356
1442
invalidated_properties):
1358
1444
standard.
1359
1445
"""
1360
1446
pass
1361
1447
1362
1448
@dbus.service.method(dbus.INTROSPECTABLE_IFACE,
1363
1449
out_signature="s",
1364
1450
path_keyword='object_path',
1365
1451
connection_keyword='connection')
1366
1452
def Introspect(self, object_path, connection):
1367
1453
"""Overloading of standard D-Bus method.
1368
1454
1369
1455
Inserts property tags and interface annotation tags.
1370
1456
"""
1371
1457
xmlstring = DBusObjectWithAnnotations.Introspect(self,
1373
1459
connection)
1374
1460
try:
1375
1461
document = xml.dom.minidom.parseString(xmlstring)
1376
1462
1377
1463
def make_tag(document, name, prop):
1378
1464
e = document.createElement("property")
1379
1465
e.setAttribute("name", name)
1380
1466
e.setAttribute("type", prop._dbus_signature)
1381
1467
e.setAttribute("access", prop._dbus_access)
1382
1468
return e
1383
1469
1384
1470
for if_tag in document.getElementsByTagName("interface"):
1385
1471
# Add property tags
1386
1472
for tag in (make_tag(document, name, prop)
1428
1514
exc_info=error)
1429
1515
return xmlstring
1430
1516
1517
1431
1518
try:
1432
1519
dbus.OBJECT_MANAGER_IFACE
1433
1520
except AttributeError:
1434
1521
dbus.OBJECT_MANAGER_IFACE = "org.freedesktop.DBus.ObjectManager"
1435
1522
1523
1436
1524
class DBusObjectWithObjectManager(DBusObjectWithAnnotations):
1437
1525
"""A D-Bus object with an ObjectManager.
1438
1526
1439
1527
Classes inheriting from this exposes the standard
1440
1528
GetManagedObjects call and the InterfacesAdded and
1441
1529
InterfacesRemoved signals on the standard
1442
1530
"org.freedesktop.DBus.ObjectManager" interface.
1443
1531
1444
1532
Note: No signals are sent automatically; they must be sent
1445
1533
manually.
1446
1534
"""
1447
1535
@dbus.service.method(dbus.OBJECT_MANAGER_IFACE,
1448
out_signature = "a{oa{sa{sv}}}")
1536
out_signature="a{oa{sa{sv}}}")
1449
1537
def GetManagedObjects(self):
1450
1538
"""This function must be overridden"""
1451
1539
raise NotImplementedError()
1452
1540
1453
1541
@dbus.service.signal(dbus.OBJECT_MANAGER_IFACE,
1454
signature = "oa{sa{sv}}")
1542
signature="oa{sa{sv}}")
1455
1543
def InterfacesAdded(self, object_path, interfaces_and_properties):
1456
1544
pass
1457
1458
@dbus.service.signal(dbus.OBJECT_MANAGER_IFACE, signature = "oas")
1545
1546
@dbus.service.signal(dbus.OBJECT_MANAGER_IFACE, signature="oas")
1459
1547
def InterfacesRemoved(self, object_path, interfaces):
1460
1548
pass
1461
1549
1462
1550
@dbus.service.method(dbus.INTROSPECTABLE_IFACE,
1463
out_signature = "s",
1464
path_keyword = 'object_path',
1465
connection_keyword = 'connection')
1551
out_signature="s",
1552
path_keyword='object_path',
1553
connection_keyword='connection')
1466
1554
def Introspect(self, object_path, connection):
1467
1555
"""Overloading of standard D-Bus method.
1468
1556
1469
1557
Override return argument name of GetManagedObjects to be
1470
1558
"objpath_interfaces_and_properties"
1471
1559
"""
1474
1562
connection)
1475
1563
try:
1476
1564
document = xml.dom.minidom.parseString(xmlstring)
1477
1565
1478
1566
for if_tag in document.getElementsByTagName("interface"):
1479
1567
# Fix argument name for the GetManagedObjects method
1480
1568
if (if_tag.getAttribute("name")
1481
== dbus.OBJECT_MANAGER_IFACE):
1569
== dbus.OBJECT_MANAGER_IFACE):
1482
1570
for cn in if_tag.getElementsByTagName("method"):
1483
1571
if (cn.getAttribute("name")
1484
1572
== "GetManagedObjects"):
1494
1582
except (AttributeError, xml.dom.DOMException,
1495
1583
xml.parsers.expat.ExpatError) as error:
1496
1584
logger.error("Failed to override Introspection method",
1497
exc_info = error)
1585
exc_info=error)
1498
1586
return xmlstring
1499
1587
1588
1500
1589
def datetime_to_dbus(dt, variant_level=0):
1501
1590
"""Convert a UTC datetime.datetime() to a D-Bus type."""
1502
1591
if dt is None:
1503
return dbus.String("", variant_level = variant_level)
1592
return dbus.String("", variant_level=variant_level)
1504
1593
return dbus.String(dt.isoformat(), variant_level=variant_level)
1505
1594
1506
1595
1509
1598
dbus.service.Object, it will add alternate D-Bus attributes with
1510
1599
interface names according to the "alt_interface_names" mapping.
1511
1600
Usage:
1512
1601
1513
1602
@alternate_dbus_interfaces({"org.example.Interface":
1514
1603
"net.example.AlternateInterface"})
1515
1604
class SampleDBusObject(dbus.service.Object):
1516
1605
@dbus.service.method("org.example.Interface")
1517
1606
def SampleDBusMethod():
1518
1607
pass
1519
1608
1520
1609
The above "SampleDBusMethod" on "SampleDBusObject" will be
1521
1610
reachable via two interfaces: "org.example.Interface" and
1522
1611
"net.example.AlternateInterface", the latter of which will have
1523
1612
its D-Bus annotation "org.freedesktop.DBus.Deprecated" set to
1524
1613
"true", unless "deprecate" is passed with a False value.
1525
1614
1526
1615
This works for methods and signals, and also for D-Bus properties
1527
1616
(from DBusObjectWithProperties) and interfaces (from the
1528
1617
dbus_interface_annotations decorator).
1529
1618
"""
1530
1619
1531
1620
def wrapper(cls):
1532
1621
for orig_interface_name, alt_interface_name in (
1533
1622
alt_interface_names.items()):
1573
1662
attribute._dbus_annotations)
1574
1663
except AttributeError:
1575
1664
pass
1665
1576
1666
# Define a creator of a function to call both the
1577
1667
# original and alternate functions, so both the
1578
1668
# original and alternate signals gets sent when
1581
1671
"""This function is a scope container to pass
1582
1672
func1 and func2 to the "call_both" function
1583
1673
outside of its arguments"""
1584
1674
1585
1675
@functools.wraps(func2)
1586
1676
def call_both(*args, **kwargs):
1587
1677
"""This function will emit two D-Bus
1588
1678
signals by calling func1 and func2"""
1589
1679
func1(*args, **kwargs)
1590
1680
func2(*args, **kwargs)
1591
# Make wrapper function look like a D-Bus signal
1681
# Make wrapper function look like a D-Bus
1682
# signal
1592
1683
for name, attr in inspect.getmembers(func2):
1593
1684
if name.startswith("_dbus_"):
1594
1685
setattr(call_both, name, attr)
1595
1686
1596
1687
return call_both
1597
1688
# Create the "call_both" function and add it to
1598
1689
# the class
1644
1735
(copy_function(attribute)))
1645
1736
if deprecate:
1646
1737
# Deprecate all alternate interfaces
1647
iname="_AlternateDBusNames_interface_annotation{}"
1738
iname = "_AlternateDBusNames_interface_annotation{}"
1648
1739
for interface_name in interface_names:
1649
1740
1650
1741
@dbus_interface_annotations(interface_name)
1651
1742
def func(self):
1652
return { "org.freedesktop.DBus.Deprecated":
1653
"true" }
1743
return {"org.freedesktop.DBus.Deprecated":
1744
"true"}
1654
1745
# Find an unused name
1655
1746
for aname in (iname.format(i)
1656
1747
for i in itertools.count()):
1667
1758
cls = type("{}Alternate".format(cls.__name__),
1668
1759
(cls, ), attr)
1669
1760
return cls
1670
1761
1671
1762
return wrapper
1672
1763
1673
1764
1675
1766
"se.bsnet.fukt.Mandos"})
1676
1767
class ClientDBus(Client, DBusObjectWithProperties):
1677
1768
"""A Client class using D-Bus
1678
1769
1679
1770
Attributes:
1680
1771
dbus_object_path: dbus.ObjectPath
1681
1772
bus: dbus.SystemBus()
1682
1773
"""
1683
1774
1684
1775
runtime_expansions = (Client.runtime_expansions
1685
1776
+ ("dbus_object_path", ))
1686
1777
1687
1778
_interface = "se.recompile.Mandos.Client"
1688
1779
1689
1780
# dbus.service.Object doesn't use super(), so we can't either.
1690
1691
def __init__(self, bus = None, *args, **kwargs):
1781
1782
def __init__(self, bus=None, *args, **kwargs):
1692
1783
self.bus = bus
1693
1784
Client.__init__(self, *args, **kwargs)
1694
1785
# Only now, when this client is initialized, can it show up on
1700
1791
"/clients/" + client_object_name)
1701
1792
DBusObjectWithProperties.__init__(self, self.bus,
1702
1793
self.dbus_object_path)
1703
1794
1704
1795
def notifychangeproperty(transform_func, dbus_name,
1705
1796
type_func=lambda x: x,
1706
1797
variant_level=1,
1708
1799
_interface=_interface):
1709
1800
""" Modify a variable so that it's a property which announces
1710
1801
its changes to DBus.
1711
1802
1712
1803
transform_fun: Function that takes a value and a variant_level
1713
1804
and transforms it to a D-Bus type.
1714
1805
dbus_name: D-Bus name of the variable
1717
1808
variant_level: D-Bus variant level. Default: 1
1718
1809
"""
1719
1810
attrname = "_{}".format(dbus_name)
1720
1811
1721
1812
def setter(self, value):
1722
1813
if hasattr(self, "dbus_object_path"):
1723
1814
if (not hasattr(self, attrname) or
1730
1821
else:
1731
1822
dbus_value = transform_func(
1732
1823
type_func(value),
1733
variant_level = variant_level)
1824
variant_level=variant_level)
1734
1825
self.PropertyChanged(dbus.String(dbus_name),
1735
1826
dbus_value)
1736
1827
self.PropertiesChanged(
1737
1828
_interface,
1738
dbus.Dictionary({ dbus.String(dbus_name):
1739
dbus_value }),
1829
dbus.Dictionary({dbus.String(dbus_name):
1830
dbus_value}),
1740
1831
dbus.Array())
1741
1832
setattr(self, attrname, value)
1742
1833
1743
1834
return property(lambda self: getattr(self, attrname), setter)
1744
1835
1745
1836
expires = notifychangeproperty(datetime_to_dbus, "Expires")
1746
1837
approvals_pending = notifychangeproperty(dbus.Boolean,
1747
1838
"ApprovalPending",
1748
type_func = bool)
1839
type_func=bool)
1749
1840
enabled = notifychangeproperty(dbus.Boolean, "Enabled")
1750
1841
last_enabled = notifychangeproperty(datetime_to_dbus,
1751
1842
"LastEnabled")
1752
1843
checker = notifychangeproperty(
1753
1844
dbus.Boolean, "CheckerRunning",
1754
type_func = lambda checker: checker is not None)
1845
type_func=lambda checker: checker is not None)
1755
1846
last_checked_ok = notifychangeproperty(datetime_to_dbus,
1756
1847
"LastCheckedOK")
1757
1848
last_checker_status = notifychangeproperty(dbus.Int16,
1762
1853
"ApprovedByDefault")
1763
1854
approval_delay = notifychangeproperty(
1764
1855
dbus.UInt64, "ApprovalDelay",
1765
type_func = lambda td: td.total_seconds() * 1000)
1856
type_func=lambda td: td.total_seconds() * 1000)
1766
1857
approval_duration = notifychangeproperty(
1767
1858
dbus.UInt64, "ApprovalDuration",
1768
type_func = lambda td: td.total_seconds() * 1000)
1859
type_func=lambda td: td.total_seconds() * 1000)
1769
1860
host = notifychangeproperty(dbus.String, "Host")
1770
1861
timeout = notifychangeproperty(
1771
1862
dbus.UInt64, "Timeout",
1772
type_func = lambda td: td.total_seconds() * 1000)
1863
type_func=lambda td: td.total_seconds() * 1000)
1773
1864
extended_timeout = notifychangeproperty(
1774
1865
dbus.UInt64, "ExtendedTimeout",
1775
type_func = lambda td: td.total_seconds() * 1000)
1866
type_func=lambda td: td.total_seconds() * 1000)
1776
1867
interval = notifychangeproperty(
1777
1868
dbus.UInt64, "Interval",
1778
type_func = lambda td: td.total_seconds() * 1000)
1869
type_func=lambda td: td.total_seconds() * 1000)
1779
1870
checker_command = notifychangeproperty(dbus.String, "Checker")
1780
1871
secret = notifychangeproperty(dbus.ByteArray, "Secret",
1781
1872
invalidate_only=True)
1782
1873
1783
1874
del notifychangeproperty
1784
1875
1785
1876
def __del__(self, *args, **kwargs):
1786
1877
try:
1787
1878
self.remove_from_connection()
1790
1881
if hasattr(DBusObjectWithProperties, "__del__"):
1791
1882
DBusObjectWithProperties.__del__(self, *args, **kwargs)
1792
1883
Client.__del__(self, *args, **kwargs)
1793
1884
1794
1885
def checker_callback(self, source, condition,
1795
1886
connection, command, *args, **kwargs):
1796
1887
ret = Client.checker_callback(self, source, condition,
1812
1903
| self.last_checker_signal),
1813
1904
dbus.String(command))
1814
1905
return ret
1815
1906
1816
1907
def start_checker(self, *args, **kwargs):
1817
1908
old_checker_pid = getattr(self.checker, "pid", None)
1818
1909
r = Client.start_checker(self, *args, **kwargs)
1822
1913
# Emit D-Bus signal
1823
1914
self.CheckerStarted(self.current_checker_command)
1824
1915
return r
1825
1916
1826
1917
def _reset_approved(self):
1827
1918
self.approved = None
1828
1919
return False
1829
1920
1830
1921
def approve(self, value=True):
1831
1922
self.approved = value
1832
1923
GLib.timeout_add(int(self.approval_duration.total_seconds()
1833
1924
* 1000), self._reset_approved)
1834
1925
self.send_changedstate()
1835
1836
## D-Bus methods, signals & properties
1837
1838
## Interfaces
1839
1840
## Signals
1841
1926
1927
# D-Bus methods, signals & properties
1928
1929
# Interfaces
1930
1931
# Signals
1932
1842
1933
# CheckerCompleted - signal
1843
1934
@dbus.service.signal(_interface, signature="nxs")
1844
1935
def CheckerCompleted(self, exitcode, waitstatus, command):
1845
1936
"D-Bus signal"
1846
1937
pass
1847
1938
1848
1939
# CheckerStarted - signal
1849
1940
@dbus.service.signal(_interface, signature="s")
1850
1941
def CheckerStarted(self, command):
1851
1942
"D-Bus signal"
1852
1943
pass
1853
1944
1854
1945
# PropertyChanged - signal
1855
1946
@dbus_annotations({"org.freedesktop.DBus.Deprecated": "true"})
1856
1947
@dbus.service.signal(_interface, signature="sv")
1857
1948
def PropertyChanged(self, property, value):
1858
1949
"D-Bus signal"
1859
1950
pass
1860
1951
1861
1952
# GotSecret - signal
1862
1953
@dbus.service.signal(_interface)
1863
1954
def GotSecret(self):
1866
1957
server to mandos-client
1867
1958
"""
1868
1959
pass
1869
1960
1870
1961
# Rejected - signal
1871
1962
@dbus.service.signal(_interface, signature="s")
1872
1963
def Rejected(self, reason):
1873
1964
"D-Bus signal"
1874
1965
pass
1875
1966
1876
1967
# NeedApproval - signal
1877
1968
@dbus.service.signal(_interface, signature="tb")
1878
1969
def NeedApproval(self, timeout, default):
1879
1970
"D-Bus signal"
1880
1971
return self.need_approval()
1881
1882
## Methods
1883
1972
1973
# Methods
1974
1884
1975
# Approve - method
1885
1976
@dbus.service.method(_interface, in_signature="b")
1886
1977
def Approve(self, value):
1887
1978
self.approve(value)
1888
1979
1889
1980
# CheckedOK - method
1890
1981
@dbus.service.method(_interface)
1891
1982
def CheckedOK(self):
1892
1983
self.checked_ok()
1893
1984
1894
1985
# Enable - method
1895
1986
@dbus_annotations({"org.freedesktop.DBus.Deprecated": "true"})
1896
1987
@dbus.service.method(_interface)
1897
1988
def Enable(self):
1898
1989
"D-Bus method"
1899
1990
self.enable()
1900
1991
1901
1992
# StartChecker - method
1902
1993
@dbus_annotations({"org.freedesktop.DBus.Deprecated": "true"})
1903
1994
@dbus.service.method(_interface)
1904
1995
def StartChecker(self):
1905
1996
"D-Bus method"
1906
1997
self.start_checker()
1907
1998
1908
1999
# Disable - method
1909
2000
@dbus_annotations({"org.freedesktop.DBus.Deprecated": "true"})
1910
2001
@dbus.service.method(_interface)
1911
2002
def Disable(self):
1912
2003
"D-Bus method"
1913
2004
self.disable()
1914
2005
1915
2006
# StopChecker - method
1916
2007
@dbus_annotations({"org.freedesktop.DBus.Deprecated": "true"})
1917
2008
@dbus.service.method(_interface)
1918
2009
def StopChecker(self):
1919
2010
self.stop_checker()
1920
1921
## Properties
1922
2011
2012
# Properties
2013
1923
2014
# ApprovalPending - property
1924
2015
@dbus_service_property(_interface, signature="b", access="read")
1925
2016
def ApprovalPending_dbus_property(self):
1926
2017
return dbus.Boolean(bool(self.approvals_pending))
1927
2018
1928
2019
# ApprovedByDefault - property
1929
2020
@dbus_service_property(_interface,
1930
2021
signature="b",
1933
2024
if value is None: # get
1934
2025
return dbus.Boolean(self.approved_by_default)
1935
2026
self.approved_by_default = bool(value)
1936
2027
1937
2028
# ApprovalDelay - property
1938
2029
@dbus_service_property(_interface,
1939
2030
signature="t",
1943
2034
return dbus.UInt64(self.approval_delay.total_seconds()
1944
2035
* 1000)
1945
2036
self.approval_delay = datetime.timedelta(0, 0, 0, value)
1946
2037
1947
2038
# ApprovalDuration - property
1948
2039
@dbus_service_property(_interface,
1949
2040
signature="t",
1953
2044
return dbus.UInt64(self.approval_duration.total_seconds()
1954
2045
* 1000)
1955
2046
self.approval_duration = datetime.timedelta(0, 0, 0, value)
1956
2047
1957
2048
# Name - property
1958
2049
@dbus_annotations(
1959
2050
{"org.freedesktop.DBus.Property.EmitsChangedSignal": "const"})
1960
2051
@dbus_service_property(_interface, signature="s", access="read")
1961
2052
def Name_dbus_property(self):
1962
2053
return dbus.String(self.name)
1963
2054
2055
# KeyID - property
2056
@dbus_annotations(
2057
{"org.freedesktop.DBus.Property.EmitsChangedSignal": "const"})
2058
@dbus_service_property(_interface, signature="s", access="read")
2059
def KeyID_dbus_property(self):
2060
return dbus.String(self.key_id)
2061
1964
2062
# Fingerprint - property
1965
2063
@dbus_annotations(
1966
2064
{"org.freedesktop.DBus.Property.EmitsChangedSignal": "const"})
1967
2065
@dbus_service_property(_interface, signature="s", access="read")
1968
2066
def Fingerprint_dbus_property(self):
1969
2067
return dbus.String(self.fingerprint)
1970
2068
1971
2069
# Host - property
1972
2070
@dbus_service_property(_interface,
1973
2071
signature="s",
1976
2074
if value is None: # get
1977
2075
return dbus.String(self.host)
1978
2076
self.host = str(value)
1979
2077
1980
2078
# Created - property
1981
2079
@dbus_annotations(
1982
2080
{"org.freedesktop.DBus.Property.EmitsChangedSignal": "const"})
1983
2081
@dbus_service_property(_interface, signature="s", access="read")
1984
2082
def Created_dbus_property(self):
1985
2083
return datetime_to_dbus(self.created)
1986
2084
1987
2085
# LastEnabled - property
1988
2086
@dbus_service_property(_interface, signature="s", access="read")
1989
2087
def LastEnabled_dbus_property(self):
1990
2088
return datetime_to_dbus(self.last_enabled)
1991
2089
1992
2090
# Enabled - property
1993
2091
@dbus_service_property(_interface,
1994
2092
signature="b",
2000
2098
self.enable()
2001
2099
else:
2002
2100
self.disable()
2003
2101
2004
2102
# LastCheckedOK - property
2005
2103
@dbus_service_property(_interface,
2006
2104
signature="s",
2010
2108
self.checked_ok()
2011
2109
return
2012
2110
return datetime_to_dbus(self.last_checked_ok)
2013
2111
2014
2112
# LastCheckerStatus - property
2015
2113
@dbus_service_property(_interface, signature="n", access="read")
2016
2114
def LastCheckerStatus_dbus_property(self):
2017
2115
return dbus.Int16(self.last_checker_status)
2018
2116
2019
2117
# Expires - property
2020
2118
@dbus_service_property(_interface, signature="s", access="read")
2021
2119
def Expires_dbus_property(self):
2022
2120
return datetime_to_dbus(self.expires)
2023
2121
2024
2122
# LastApprovalRequest - property
2025
2123
@dbus_service_property(_interface, signature="s", access="read")
2026
2124
def LastApprovalRequest_dbus_property(self):
2027
2125
return datetime_to_dbus(self.last_approval_request)
2028
2126
2029
2127
# Timeout - property
2030
2128
@dbus_service_property(_interface,
2031
2129
signature="t",
2050
2148
self.disable_initiator_tag = GLib.timeout_add(
2051
2149
int((self.expires - now).total_seconds() * 1000),
2052
2150
self.disable)
2053
2151
2054
2152
# ExtendedTimeout - property
2055
2153
@dbus_service_property(_interface,
2056
2154
signature="t",
2060
2158
return dbus.UInt64(self.extended_timeout.total_seconds()
2061
2159
* 1000)
2062
2160
self.extended_timeout = datetime.timedelta(0, 0, 0, value)
2063
2161
2064
2162
# Interval - property
2065
2163
@dbus_service_property(_interface,
2066
2164
signature="t",
2076
2174
GLib.source_remove(self.checker_initiator_tag)
2077
2175
self.checker_initiator_tag = GLib.timeout_add(
2078
2176
value, self.start_checker)
2079
self.start_checker() # Start one now, too
2080
2177
self.start_checker() # Start one now, too
2178
2081
2179
# Checker - property
2082
2180
@dbus_service_property(_interface,
2083
2181
signature="s",
2086
2184
if value is None: # get
2087
2185
return dbus.String(self.checker_command)
2088
2186
self.checker_command = str(value)
2089
2187
2090
2188
# CheckerRunning - property
2091
2189
@dbus_service_property(_interface,
2092
2190
signature="b",
2098
2196
self.start_checker()
2099
2197
else:
2100
2198
self.stop_checker()
2101
2199
2102
2200
# ObjectPath - property
2103
2201
@dbus_annotations(
2104
2202
{"org.freedesktop.DBus.Property.EmitsChangedSignal": "const",
2105
2203
"org.freedesktop.DBus.Deprecated": "true"})
2106
2204
@dbus_service_property(_interface, signature="o", access="read")
2107
2205
def ObjectPath_dbus_property(self):
2108
return self.dbus_object_path # is already a dbus.ObjectPath
2109
2206
return self.dbus_object_path # is already a dbus.ObjectPath
2207
2110
2208
# Secret = property
2111
2209
@dbus_annotations(
2112
2210
{"org.freedesktop.DBus.Property.EmitsChangedSignal":
2117
2215
byte_arrays=True)
2118
2216
def Secret_dbus_property(self, value):
2119
2217
self.secret = bytes(value)
2120
2218
2121
2219
del _interface
2122
2220
2123
2221
2124
2222
class ProxyClient(object):
2125
def __init__(self, child_pipe, fpr, address):
2223
def __init__(self, child_pipe, key_id, fpr, address):
2126
2224
self._pipe = child_pipe
2127
self._pipe.send(('init', fpr, address))
2225
self._pipe.send(('init', key_id, fpr, address))
2128
2226
if not self._pipe.recv():
2129
raise KeyError(fpr)
2130
2227
raise KeyError(key_id or fpr)
2228
2131
2229
def __getattribute__(self, name):
2132
2230
if name == '_pipe':
2133
2231
return super(ProxyClient, self).__getattribute__(name)
2136
2234
if data[0] == 'data':
2137
2235
return data[1]
2138
2236
if data[0] == 'function':
2139
2237
2140
2238
def func(*args, **kwargs):
2141
2239
self._pipe.send(('funcall', name, args, kwargs))
2142
2240
return self._pipe.recv()[1]
2143
2241
2144
2242
return func
2145
2243
2146
2244
def __setattr__(self, name, value):
2147
2245
if name == '_pipe':
2148
2246
return super(ProxyClient, self).__setattr__(name, value)
2151
2249
2152
2250
class ClientHandler(socketserver.BaseRequestHandler, object):
2153
2251
"""A class to handle client connections.
2154
2252
2155
2253
Instantiated once for each connection to handle it.
2156
2254
Note: This will run in its own forked process."""
2157
2255
2158
2256
def handle(self):
2159
2257
with contextlib.closing(self.server.child_pipe) as child_pipe:
2160
2258
logger.info("TCP connection from: %s",
2161
2259
str(self.client_address))
2162
2260
logger.debug("Pipe FD: %d",
2163
2261
self.server.child_pipe.fileno())
2164
2262
2165
2263
session = gnutls.ClientSession(self.request)
2166
2167
#priority = ':'.join(("NONE", "+VERS-TLS1.1",
2168
# "+AES-256-CBC", "+SHA1",
2169
# "+COMP-NULL", "+CTYPE-OPENPGP",
2170
# "+DHE-DSS"))
2264
2265
# priority = ':'.join(("NONE", "+VERS-TLS1.1",
2266
# "+AES-256-CBC", "+SHA1",
2267
# "+COMP-NULL", "+CTYPE-OPENPGP",
2268
# "+DHE-DSS"))
2171
2269
# Use a fallback default, since this MUST be set.
2172
2270
priority = self.server.gnutls_priority
2173
2271
if priority is None:
2174
2272
priority = "NORMAL"
2175
gnutls.priority_set_direct(session._c_object, priority,
2273
gnutls.priority_set_direct(session._c_object,
2274
priority.encode("utf-8"),
2176
2275
None)
2177
2276
2178
2277
# Start communication using the Mandos protocol
2179
2278
# Get protocol number
2180
2279
line = self.request.makefile().readline()
2185
2284
except (ValueError, IndexError, RuntimeError) as error:
2186
2285
logger.error("Unknown protocol version: %s", error)
2187
2286
return
2188
2287
2189
2288
# Start GnuTLS connection
2190
2289
try:
2191
2290
session.handshake()
2195
2294
# established. Just abandon the request.
2196
2295
return
2197
2296
logger.debug("Handshake succeeded")
2198
2297
2199
2298
approval_required = False
2200
2299
try:
2201
try:
2202
fpr = self.fingerprint(
2203
self.peer_certificate(session))
2204
except (TypeError, gnutls.Error) as error:
2205
logger.warning("Bad certificate: %s", error)
2206
return
2207
logger.debug("Fingerprint: %s", fpr)
2208
2209
try:
2210
client = ProxyClient(child_pipe, fpr,
2300
if gnutls.has_rawpk:
2301
fpr = ""
2302
try:
2303
key_id = self.key_id(
2304
self.peer_certificate(session))
2305
except (TypeError, gnutls.Error) as error:
2306
logger.warning("Bad certificate: %s", error)
2307
return
2308
logger.debug("Key ID: %s", key_id)
2309
2310
else:
2311
key_id = ""
2312
try:
2313
fpr = self.fingerprint(
2314
self.peer_certificate(session))
2315
except (TypeError, gnutls.Error) as error:
2316
logger.warning("Bad certificate: %s", error)
2317
return
2318
logger.debug("Fingerprint: %s", fpr)
2319
2320
try:
2321
client = ProxyClient(child_pipe, key_id, fpr,
2211
2322
self.client_address)
2212
2323
except KeyError:
2213
2324
return
2214
2325
2215
2326
if client.approval_delay:
2216
2327
delay = client.approval_delay
2217
2328
client.approvals_pending += 1
2218
2329
approval_required = True
2219
2330
2220
2331
while True:
2221
2332
if not client.enabled:
2222
2333
logger.info("Client %s is disabled",
2225
2336
# Emit D-Bus signal
2226
2337
client.Rejected("Disabled")
2227
2338
return
2228
2339
2229
2340
if client.approved or not client.approval_delay:
2230
#We are approved or approval is disabled
2341
# We are approved or approval is disabled
2231
2342
break
2232
2343
elif client.approved is None:
2233
2344
logger.info("Client %s needs approval",
2244
2355
# Emit D-Bus signal
2245
2356
client.Rejected("Denied")
2246
2357
return
2247
2248
#wait until timeout or approved
2358
2359
# wait until timeout or approved
2249
2360
time = datetime.datetime.now()
2250
2361
client.changedstate.acquire()
2251
2362
client.changedstate.wait(delay.total_seconds())
2264
2375
break
2265
2376
else:
2266
2377
delay -= time2 - time
2267
2378
2268
2379
try:
2269
2380
session.send(client.secret)
2270
2381
except gnutls.Error as error:
2271
2382
logger.warning("gnutls send failed",
2272
exc_info = error)
2383
exc_info=error)
2273
2384
return
2274
2385
2275
2386
logger.info("Sending secret to %s", client.name)
2276
2387
# bump the timeout using extended_timeout
2277
2388
client.bump_timeout(client.extended_timeout)
2278
2389
if self.server.use_dbus:
2279
2390
# Emit D-Bus signal
2280
2391
client.GotSecret()
2281
2392
2282
2393
finally:
2283
2394
if approval_required:
2284
2395
client.approvals_pending -= 1
2287
2398
except gnutls.Error as error:
2288
2399
logger.warning("GnuTLS bye failed",
2289
2400
exc_info=error)
2290
2401
2291
2402
@staticmethod
2292
2403
def peer_certificate(session):
2293
"Return the peer's OpenPGP certificate as a bytestring"
2294
# If not an OpenPGP certificate...
2295
if (gnutls.certificate_type_get(session._c_object)
2296
!= gnutls.CRT_OPENPGP):
2404
"Return the peer's certificate as a bytestring"
2405
try:
2406
cert_type = gnutls.certificate_type_get2(session._c_object,
2407
gnutls.CTYPE_PEERS)
2408
except AttributeError:
2409
cert_type = gnutls.certificate_type_get(session._c_object)
2410
if gnutls.has_rawpk:
2411
valid_cert_types = frozenset((gnutls.CRT_RAWPK,))
2412
else:
2413
valid_cert_types = frozenset((gnutls.CRT_OPENPGP,))
2414
# If not a valid certificate type...
2415
if cert_type not in valid_cert_types:
2416
logger.info("Cert type %r not in %r", cert_type,
2417
valid_cert_types)
2297
2418
# ...return invalid data
2298
2419
return b""
2299
2420
list_size = ctypes.c_uint(1)
2305
2426
return None
2306
2427
cert = cert_list[0]
2307
2428
return ctypes.string_at(cert.data, cert.size)
2308
2429
2430
@staticmethod
2431
def key_id(certificate):
2432
"Convert a certificate bytestring to a hexdigit key ID"
2433
# New GnuTLS "datum" with the public key
2434
datum = gnutls.datum_t(
2435
ctypes.cast(ctypes.c_char_p(certificate),
2436
ctypes.POINTER(ctypes.c_ubyte)),
2437
ctypes.c_uint(len(certificate)))
2438
# XXX all these need to be created in the gnutls "module"
2439
# New empty GnuTLS certificate
2440
pubkey = gnutls.pubkey_t()
2441
gnutls.pubkey_init(ctypes.byref(pubkey))
2442
# Import the raw public key into the certificate
2443
gnutls.pubkey_import(pubkey,
2444
ctypes.byref(datum),
2445
gnutls.X509_FMT_DER)
2446
# New buffer for the key ID
2447
buf = ctypes.create_string_buffer(32)
2448
buf_len = ctypes.c_size_t(len(buf))
2449
# Get the key ID from the raw public key into the buffer
2450
gnutls.pubkey_get_key_id(pubkey,
2451
gnutls.KEYID_USE_SHA256,
2452
ctypes.cast(ctypes.byref(buf),
2453
ctypes.POINTER(ctypes.c_ubyte)),
2454
ctypes.byref(buf_len))
2455
# Deinit the certificate
2456
gnutls.pubkey_deinit(pubkey)
2457
2458
# Convert the buffer to a Python bytestring
2459
key_id = ctypes.string_at(buf, buf_len.value)
2460
# Convert the bytestring to hexadecimal notation
2461
hex_key_id = binascii.hexlify(key_id).upper()
2462
return hex_key_id
2463
2309
2464
@staticmethod
2310
2465
def fingerprint(openpgp):
2311
2466
"Convert an OpenPGP bytestring to a hexdigit fingerprint"
2326
2481
ctypes.byref(crtverify))
2327
2482
if crtverify.value != 0:
2328
2483
gnutls.openpgp_crt_deinit(crt)
2329
raise gnutls.CertificateSecurityError("Verify failed")
2484
raise gnutls.CertificateSecurityError(code
2485
=crtverify.value)
2330
2486
# New buffer for the fingerprint
2331
2487
buf = ctypes.create_string_buffer(20)
2332
2488
buf_len = ctypes.c_size_t()
2344
2500
2345
2501
class MultiprocessingMixIn(object):
2346
2502
"""Like socketserver.ThreadingMixIn, but with multiprocessing"""
2347
2503
2348
2504
def sub_process_main(self, request, address):
2349
2505
try:
2350
2506
self.finish_request(request, address)
2351
2507
except Exception:
2352
2508
self.handle_error(request, address)
2353
2509
self.close_request(request)
2354
2510
2355
2511
def process_request(self, request, address):
2356
2512
"""Start a new process to process the request."""
2357
proc = multiprocessing.Process(target = self.sub_process_main,
2358
args = (request, address))
2513
proc = multiprocessing.Process(target=self.sub_process_main,
2514
args=(request, address))
2359
2515
proc.start()
2360
2516
return proc
2361
2517
2362
2518
2363
2519
class MultiprocessingMixInWithPipe(MultiprocessingMixIn, object):
2364
2520
""" adds a pipe to the MixIn """
2365
2521
2366
2522
def process_request(self, request, client_address):
2367
2523
"""Overrides and wraps the original process_request().
2368
2524
2369
2525
This function creates a new pipe in self.pipe
2370
2526
"""
2371
2527
parent_pipe, self.child_pipe = multiprocessing.Pipe()
2372
2528
2373
2529
proc = MultiprocessingMixIn.process_request(self, request,
2374
2530
client_address)
2375
2531
self.child_pipe.close()
2376
2532
self.add_pipe(parent_pipe, proc)
2377
2533
2378
2534
def add_pipe(self, parent_pipe, proc):
2379
2535
"""Dummy function; override as necessary"""
2380
2536
raise NotImplementedError()
2383
2539
class IPv6_TCPServer(MultiprocessingMixInWithPipe,
2384
2540
socketserver.TCPServer, object):
2385
2541
"""IPv6-capable TCP server. Accepts 'None' as address and/or port
2386
2542
2387
2543
Attributes:
2388
2544
enabled: Boolean; whether this server is activated yet
2389
2545
interface: None or a network interface name (string)
2390
2546
use_ipv6: Boolean; to use IPv6 or not
2391
2547
"""
2392
2548
2393
2549
def __init__(self, server_address, RequestHandlerClass,
2394
2550
interface=None,
2395
2551
use_ipv6=True,
2405
2561
self.socketfd = socketfd
2406
2562
# Save the original socket.socket() function
2407
2563
self.socket_socket = socket.socket
2564
2408
2565
# To implement --socket, we monkey patch socket.socket.
2409
#
2566
#
2410
2567
# (When socketserver.TCPServer is a new-style class, we
2411
2568
# could make self.socket into a property instead of monkey
2412
2569
# patching socket.socket.)
2413
#
2570
#
2414
2571
# Create a one-time-only replacement for socket.socket()
2415
2572
@functools.wraps(socket.socket)
2416
2573
def socket_wrapper(*args, **kwargs):
2428
2585
# socket_wrapper(), if socketfd was set.
2429
2586
socketserver.TCPServer.__init__(self, server_address,
2430
2587
RequestHandlerClass)
2431
2588
2432
2589
def server_bind(self):
2433
2590
"""This overrides the normal server_bind() function
2434
2591
to bind to an interface if one was specified, and also NOT to
2435
2592
bind to an address or port if they were not specified."""
2593
global SO_BINDTODEVICE
2436
2594
if self.interface is not None:
2437
2595
if SO_BINDTODEVICE is None:
2438
logger.error("SO_BINDTODEVICE does not exist;"
2439
" cannot bind to interface %s",
2440
self.interface)
2441
else:
2442
try:
2443
self.socket.setsockopt(
2444
socket.SOL_SOCKET, SO_BINDTODEVICE,
2445
(self.interface + "\0").encode("utf-8"))
2446
except socket.error as error:
2447
if error.errno == errno.EPERM:
2448
logger.error("No permission to bind to"
2449
" interface %s", self.interface)
2450
elif error.errno == errno.ENOPROTOOPT:
2451
logger.error("SO_BINDTODEVICE not available;"
2452
" cannot bind to interface %s",
2453
self.interface)
2454
elif error.errno == errno.ENODEV:
2455
logger.error("Interface %s does not exist,"
2456
" cannot bind", self.interface)
2457
else:
2458
raise
2596
# Fall back to a hard-coded value which seems to be
2597
# common enough.
2598
logger.warning("SO_BINDTODEVICE not found, trying 25")
2599
SO_BINDTODEVICE = 25
2600
try:
2601
self.socket.setsockopt(
2602
socket.SOL_SOCKET, SO_BINDTODEVICE,
2603
(self.interface + "\0").encode("utf-8"))
2604
except socket.error as error:
2605
if error.errno == errno.EPERM:
2606
logger.error("No permission to bind to"
2607
" interface %s", self.interface)
2608
elif error.errno == errno.ENOPROTOOPT:
2609
logger.error("SO_BINDTODEVICE not available;"
2610
" cannot bind to interface %s",
2611
self.interface)
2612
elif error.errno == errno.ENODEV:
2613
logger.error("Interface %s does not exist,"
2614
" cannot bind", self.interface)
2615
else:
2616
raise
2459
2617
# Only bind(2) the socket if we really need to.
2460
2618
if self.server_address[0] or self.server_address[1]:
2461
2619
if not self.server_address[0]:
2462
2620
if self.address_family == socket.AF_INET6:
2463
any_address = "::" # in6addr_any
2621
any_address = "::" # in6addr_any
2464
2622
else:
2465
any_address = "0.0.0.0" # INADDR_ANY
2623
any_address = "0.0.0.0" # INADDR_ANY
2466
2624
self.server_address = (any_address,
2467
2625
self.server_address[1])
2468
2626
elif not self.server_address[1]:
2478
2636
2479
2637
class MandosServer(IPv6_TCPServer):
2480
2638
"""Mandos server.
2481
2639
2482
2640
Attributes:
2483
2641
clients: set of Client objects
2484
2642
gnutls_priority GnuTLS priority string
2485
2643
use_dbus: Boolean; to emit D-Bus signals or not
2486
2644
2487
2645
Assumes a GLib.MainLoop event loop.
2488
2646
"""
2489
2647
2490
2648
def __init__(self, server_address, RequestHandlerClass,
2491
2649
interface=None,
2492
2650
use_ipv6=True,
2502
2660
self.gnutls_priority = gnutls_priority
2503
2661
IPv6_TCPServer.__init__(self, server_address,
2504
2662
RequestHandlerClass,
2505
interface = interface,
2506
use_ipv6 = use_ipv6,
2507
socketfd = socketfd)
2508
2663
interface=interface,
2664
use_ipv6=use_ipv6,
2665
socketfd=socketfd)
2666
2509
2667
def server_activate(self):
2510
2668
if self.enabled:
2511
2669
return socketserver.TCPServer.server_activate(self)
2512
2670
2513
2671
def enable(self):
2514
2672
self.enabled = True
2515
2673
2516
2674
def add_pipe(self, parent_pipe, proc):
2517
2675
# Call "handle_ipc" for both data and EOF events
2518
2676
GLib.io_add_watch(
2519
2677
parent_pipe.fileno(),
2520
2678
GLib.IO_IN | GLib.IO_HUP,
2521
2679
functools.partial(self.handle_ipc,
2522
parent_pipe = parent_pipe,
2523
proc = proc))
2524
2680
parent_pipe=parent_pipe,
2681
proc=proc))
2682
2525
2683
def handle_ipc(self, source, condition,
2526
2684
parent_pipe=None,
2527
proc = None,
2685
proc=None,
2528
2686
client_object=None):
2529
2687
# error, or the other end of multiprocessing.Pipe has closed
2530
2688
if condition & (GLib.IO_ERR | GLib.IO_HUP):
2531
2689
# Wait for other process to exit
2532
2690
proc.join()
2533
2691
return False
2534
2692
2535
2693
# Read a request from the child
2536
2694
request = parent_pipe.recv()
2537
2695
command = request[0]
2538
2696
2539
2697
if command == 'init':
2540
fpr = request[1]
2541
address = request[2]
2542
2698
key_id = request[1].decode("ascii")
2699
fpr = request[2].decode("ascii")
2700
address = request[3]
2701
2543
2702
for c in self.clients.values():
2544
if c.fingerprint == fpr:
2703
if key_id == "E3B0C44298FC1C149AFBF4C8996FB92427AE41E4649B934CA495991B7852B855":
2704
continue
2705
if key_id and c.key_id == key_id:
2706
client = c
2707
break
2708
if fpr and c.fingerprint == fpr:
2545
2709
client = c
2546
2710
break
2547
2711
else:
2548
logger.info("Client not found for fingerprint: %s, ad"
2549
"dress: %s", fpr, address)
2712
logger.info("Client not found for key ID: %s, address"
2713
": %s", key_id or fpr, address)
2550
2714
if self.use_dbus:
2551
2715
# Emit D-Bus signal
2552
mandos_dbus_service.ClientNotFound(fpr,
2716
mandos_dbus_service.ClientNotFound(key_id or fpr,
2553
2717
address[0])
2554
2718
parent_pipe.send(False)
2555
2719
return False
2556
2720
2557
2721
GLib.io_add_watch(
2558
2722
parent_pipe.fileno(),
2559
2723
GLib.IO_IN | GLib.IO_HUP,
2560
2724
functools.partial(self.handle_ipc,
2561
parent_pipe = parent_pipe,
2562
proc = proc,
2563
client_object = client))
2725
parent_pipe=parent_pipe,
2726
proc=proc,
2727
client_object=client))
2564
2728
parent_pipe.send(True)
2565
2729
# remove the old hook in favor of the new above hook on
2566
2730
# same fileno
2569
2733
funcname = request[1]
2570
2734
args = request[2]
2571
2735
kwargs = request[3]
2572
2736
2573
2737
parent_pipe.send(('data', getattr(client_object,
2574
2738
funcname)(*args,
2575
2739
**kwargs)))
2576
2740
2577
2741
if command == 'getattr':
2578
2742
attrname = request[1]
2579
2743
if isinstance(client_object.__getattribute__(attrname),
2582
2746
else:
2583
2747
parent_pipe.send((
2584
2748
'data', client_object.__getattribute__(attrname)))
2585
2749
2586
2750
if command == 'setattr':
2587
2751
attrname = request[1]
2588
2752
value = request[2]
2589
2753
setattr(client_object, attrname, value)
2590
2754
2591
2755
return True
2592
2756
2593
2757
2594
2758
def rfc3339_duration_to_delta(duration):
2595
2759
"""Parse an RFC 3339 "duration" and return a datetime.timedelta
2596
2760
2597
2761
>>> rfc3339_duration_to_delta("P7D")
2598
2762
datetime.timedelta(7)
2599
2763
>>> rfc3339_duration_to_delta("PT60S")
2609
2773
>>> rfc3339_duration_to_delta("P1DT3M20S")
2610
2774
datetime.timedelta(1, 200)
2611
2775
"""
2612
2776
2613
2777
# Parsing an RFC 3339 duration with regular expressions is not
2614
2778
# possible - there would have to be multiple places for the same
2615
2779
# values, like seconds. The current code, while more esoteric, is
2616
2780
# cleaner without depending on a parsing library. If Python had a
2617
2781
# built-in library for parsing we would use it, but we'd like to
2618
2782
# avoid excessive use of external libraries.
2619
2783
2620
2784
# New type for defining tokens, syntax, and semantics all-in-one
2621
2785
Token = collections.namedtuple("Token", (
2622
2786
"regexp", # To match token; if "value" is not None, must have
2655
2819
frozenset((token_year, token_month,
2656
2820
token_day, token_time,
2657
2821
token_week)))
2658
# Define starting values
2659
value = datetime.timedelta() # Value so far
2822
# Define starting values:
2823
# Value so far
2824
value = datetime.timedelta()
2660
2825
found_token = None
2661
followers = frozenset((token_duration, )) # Following valid tokens
2662
s = duration # String left to parse
2826
# Following valid tokens
2827
followers = frozenset((token_duration, ))
2828
# String left to parse
2829
s = duration
2663
2830
# Loop until end token is found
2664
2831
while found_token is not token_end:
2665
2832
# Search for any currently valid tokens
2689
2856
2690
2857
def string_to_delta(interval):
2691
2858
"""Parse a string and return a datetime.timedelta
2692
2859
2693
2860
>>> string_to_delta('7d')
2694
2861
datetime.timedelta(7)
2695
2862
>>> string_to_delta('60s')
2703
2870
>>> string_to_delta('5m 30s')
2704
2871
datetime.timedelta(0, 330)
2705
2872
"""
2706
2873
2707
2874
try:
2708
2875
return rfc3339_duration_to_delta(interval)
2709
2876
except ValueError:
2710
2877
pass
2711
2878
2712
2879
timevalue = datetime.timedelta(0)
2713
2880
for s in interval.split():
2714
2881
try:
2732
2899
return timevalue
2733
2900
2734
2901
2735
def daemon(nochdir = False, noclose = False):
2902
def daemon(nochdir=False, noclose=False):
2736
2903
"""See daemon(3). Standard BSD Unix function.
2737
2904
2738
2905
This should really exist as os.daemon, but it doesn't (yet)."""
2739
2906
if os.fork():
2740
2907
sys.exit()
2758
2925
2759
2926
2760
2927
def main():
2761
2928
2762
2929
##################################################################
2763
2930
# Parsing of options, both command line and config file
2764
2931
2765
2932
parser = argparse.ArgumentParser()
2766
2933
parser.add_argument("-v", "--version", action="version",
2767
version = "%(prog)s {}".format(version),
2934
version="%(prog)s {}".format(version),
2768
2935
help="show version number and exit")
2769
2936
parser.add_argument("-i", "--interface", metavar="IF",
2770
2937
help="Bind to interface IF")
2806
2973
parser.add_argument("--no-zeroconf", action="store_false",
2807
2974
dest="zeroconf", help="Do not use Zeroconf",
2808
2975
default=None)
2809
2976
2810
2977
options = parser.parse_args()
2811
2978
2812
2979
if options.check:
2813
2980
import doctest
2814
2981
fail_count, test_count = doctest.testmod()
2815
2982
sys.exit(os.EX_OK if fail_count == 0 else 1)
2816
2983
2817
2984
# Default values for config file for server-global settings
2818
server_defaults = { "interface": "",
2819
"address": "",
2820
"port": "",
2821
"debug": "False",
2822
"priority":
2823
"SECURE256:!CTYPE-X.509:+CTYPE-OPENPGP:!RSA"
2824
":+SIGN-DSA-SHA256",
2825
"servicename": "Mandos",
2826
"use_dbus": "True",
2827
"use_ipv6": "True",
2828
"debuglevel": "",
2829
"restore": "True",
2830
"socket": "",
2831
"statedir": "/var/lib/mandos",
2832
"foreground": "False",
2833
"zeroconf": "True",
2834
}
2835
2985
if gnutls.has_rawpk:
2986
priority = ("SECURE128:!CTYPE-X.509:+CTYPE-RAWPK:!RSA"
2987
":!VERS-ALL:+VERS-TLS1.3:%PROFILE_ULTRA")
2988
else:
2989
priority = ("SECURE256:!CTYPE-X.509:+CTYPE-OPENPGP:!RSA"
2990
":+SIGN-DSA-SHA256")
2991
server_defaults = {"interface": "",
2992
"address": "",
2993
"port": "",
2994
"debug": "False",
2995
"priority": priority,
2996
"servicename": "Mandos",
2997
"use_dbus": "True",
2998
"use_ipv6": "True",
2999
"debuglevel": "",
3000
"restore": "True",
3001
"socket": "",
3002
"statedir": "/var/lib/mandos",
3003
"foreground": "False",
3004
"zeroconf": "True",
3005
}
3006
del priority
3007
2836
3008
# Parse config file for server-global settings
2837
3009
server_config = configparser.SafeConfigParser(server_defaults)
2838
3010
del server_defaults
2840
3012
# Convert the SafeConfigParser object to a dict
2841
3013
server_settings = server_config.defaults()
2842
3014
# Use the appropriate methods on the non-string config options
2843
for option in ("debug", "use_dbus", "use_ipv6", "foreground"):
3015
for option in ("debug", "use_dbus", "use_ipv6", "restore",
3016
"foreground", "zeroconf"):
2844
3017
server_settings[option] = server_config.getboolean("DEFAULT",
2845
3018
option)
2846
3019
if server_settings["port"]:
2856
3029
server_settings["socket"] = os.dup(server_settings
2857
3030
["socket"])
2858
3031
del server_config
2859
3032
2860
3033
# Override the settings from the config file with command line
2861
3034
# options, if set.
2862
3035
for option in ("interface", "address", "port", "debug",
2880
3053
if server_settings["debug"]:
2881
3054
server_settings["foreground"] = True
2882
3055
# Now we have our good server settings in "server_settings"
2883
3056
2884
3057
##################################################################
2885
3058
2886
3059
if (not server_settings["zeroconf"]
2887
3060
and not (server_settings["port"]
2888
3061
or server_settings["socket"] != "")):
2889
3062
parser.error("Needs port or socket to work without Zeroconf")
2890
3063
2891
3064
# For convenience
2892
3065
debug = server_settings["debug"]
2893
3066
debuglevel = server_settings["debuglevel"]
2897
3070
stored_state_file)
2898
3071
foreground = server_settings["foreground"]
2899
3072
zeroconf = server_settings["zeroconf"]
2900
3073
2901
3074
if debug:
2902
3075
initlogger(debug, logging.DEBUG)
2903
3076
else:
2906
3079
else:
2907
3080
level = getattr(logging, debuglevel.upper())
2908
3081
initlogger(debug, level)
2909
3082
2910
3083
if server_settings["servicename"] != "Mandos":
2911
3084
syslogger.setFormatter(
2912
3085
logging.Formatter('Mandos ({}) [%(process)d]:'
2913
3086
' %(levelname)s: %(message)s'.format(
2914
3087
server_settings["servicename"])))
2915
3088
2916
3089
# Parse config file with clients
2917
3090
client_config = configparser.SafeConfigParser(Client
2918
3091
.client_defaults)
2919
3092
client_config.read(os.path.join(server_settings["configdir"],
2920
3093
"clients.conf"))
2921
3094
2922
3095
global mandos_dbus_service
2923
3096
mandos_dbus_service = None
2924
3097
2925
3098
socketfd = None
2926
3099
if server_settings["socket"] != "":
2927
3100
socketfd = server_settings["socket"]
2943
3116
except IOError as e:
2944
3117
logger.error("Could not open file %r", pidfilename,
2945
3118
exc_info=e)
2946
3119
2947
3120
for name, group in (("_mandos", "_mandos"),
2948
3121
("mandos", "mandos"),
2949
3122
("nobody", "nogroup")):
2967
3140
.format(uid, gid, os.strerror(error.errno)))
2968
3141
if error.errno != errno.EPERM:
2969
3142
raise
2970
3143
2971
3144
if debug:
2972
3145
# Enable all possible GnuTLS debugging
2973
3146
2974
3147
# "Use a log level over 10 to enable all debugging options."
2975
3148
# - GnuTLS manual
2976
3149
gnutls.global_set_log_level(11)
2977
3150
2978
3151
@gnutls.log_func
2979
3152
def debug_gnutls(level, string):
2980
3153
logger.debug("GnuTLS: %s", string[:-1])
2981
3154
2982
3155
gnutls.global_set_log_function(debug_gnutls)
2983
3156
2984
3157
# Redirect stdin so all checkers get /dev/null
2985
3158
null = os.open(os.devnull, os.O_NOCTTY | os.O_RDWR)
2986
3159
os.dup2(null, sys.stdin.fileno())
2987
3160
if null > 2:
2988
3161
os.close(null)
2989
3162
2990
3163
# Need to fork before connecting to D-Bus
2991
3164
if not foreground:
2992
3165
# Close all input and output, do double fork, etc.
2993
3166
daemon()
2994
3167
2995
3168
# multiprocessing will use threads, so before we use GLib we need
2996
3169
# to inform GLib that threads will be used.
2997
3170
GLib.threads_init()
2998
3171
2999
3172
global main_loop
3000
3173
# From the Avahi example code
3001
3174
DBusGMainLoop(set_as_default=True)
3018
3191
if zeroconf:
3019
3192
protocol = avahi.PROTO_INET6 if use_ipv6 else avahi.PROTO_INET
3020
3193
service = AvahiServiceToSyslog(
3021
name = server_settings["servicename"],
3022
servicetype = "_mandos._tcp",
3023
protocol = protocol,
3024
bus = bus)
3194
name=server_settings["servicename"],
3195
servicetype="_mandos._tcp",
3196
protocol=protocol,
3197
bus=bus)
3025
3198
if server_settings["interface"]:
3026
3199
service.interface = if_nametoindex(
3027
3200
server_settings["interface"].encode("utf-8"))
3028
3201
3029
3202
global multiprocessing_manager
3030
3203
multiprocessing_manager = multiprocessing.Manager()
3031
3204
3032
3205
client_class = Client
3033
3206
if use_dbus:
3034
client_class = functools.partial(ClientDBus, bus = bus)
3035
3207
client_class = functools.partial(ClientDBus, bus=bus)
3208
3036
3209
client_settings = Client.config_parser(client_config)
3037
3210
old_client_settings = {}
3038
3211
clients_data = {}
3039
3212
3040
3213
# This is used to redirect stdout and stderr for checker processes
3041
3214
global wnull
3042
wnull = open(os.devnull, "w") # A writable /dev/null
3215
wnull = open(os.devnull, "w") # A writable /dev/null
3043
3216
# Only used if server is running in foreground but not in debug
3044
3217
# mode
3045
3218
if debug or not foreground:
3046
3219
wnull.close()
3047
3220
3048
3221
# Get client data and settings from last running state.
3049
3222
if server_settings["restore"]:
3050
3223
try:
3051
3224
with open(stored_state_path, "rb") as stored_state:
3052
if sys.version_info.major == 2:
3225
if sys.version_info.major == 2:
3053
3226
clients_data, old_client_settings = pickle.load(
3054
3227
stored_state)
3055
3228
else:
3056
3229
bytes_clients_data, bytes_old_client_settings = (
3057
pickle.load(stored_state, encoding = "bytes"))
3058
### Fix bytes to strings
3059
## clients_data
3230
pickle.load(stored_state, encoding="bytes"))
3231
# Fix bytes to strings
3232
# clients_data
3060
3233
# .keys()
3061
clients_data = { (key.decode("utf-8")
3062
if isinstance(key, bytes)
3063
else key): value
3064
for key, value in
3065
bytes_clients_data.items() }
3234
clients_data = {(key.decode("utf-8")
3235
if isinstance(key, bytes)
3236
else key): value
3237
for key, value in
3238
bytes_clients_data.items()}
3066
3239
del bytes_clients_data
3067
3240
for key in clients_data:
3068
value = { (k.decode("utf-8")
3069
if isinstance(k, bytes) else k): v
3070
for k, v in
3071
clients_data[key].items() }
3241
value = {(k.decode("utf-8")
3242
if isinstance(k, bytes) else k): v
3243
for k, v in
3244
clients_data[key].items()}
3072
3245
clients_data[key] = value
3073
3246
# .client_structure
3074
3247
value["client_structure"] = [
3075
3248
(s.decode("utf-8")
3076
3249
if isinstance(s, bytes)
3077
3250
else s) for s in
3078
value["client_structure"] ]
3251
value["client_structure"]]
3079
3252
# .name & .host
3080
3253
for k in ("name", "host"):
3081
3254
if isinstance(value[k], bytes):
3082
3255
value[k] = value[k].decode("utf-8")
3083
## old_client_settings
3256
if not value.has_key("key_id"):
3257
value["key_id"] = ""
3258
elif not value.has_key("fingerprint"):
3259
value["fingerprint"] = ""
3260
# old_client_settings
3084
3261
# .keys()
3085
3262
old_client_settings = {
3086
3263
(key.decode("utf-8")
3087
3264
if isinstance(key, bytes)
3088
3265
else key): value
3089
3266
for key, value in
3090
bytes_old_client_settings.items() }
3267
bytes_old_client_settings.items()}
3091
3268
del bytes_old_client_settings
3092
3269
# .host
3093
3270
for value in old_client_settings.values():
3107
3284
logger.warning("Could not load persistent state: "
3108
3285
"EOFError:",
3109
3286
exc_info=e)
3110
3287
3111
3288
with PGPEngine() as pgp:
3112
3289
for client_name, client in clients_data.items():
3113
3290
# Skip removed clients
3114
3291
if client_name not in client_settings:
3115
3292
continue
3116
3293
3117
3294
# Decide which value to use after restoring saved state.
3118
3295
# We have three different values: Old config file,
3119
3296
# new config file, and saved state.
3130
3307
client[name] = value
3131
3308
except KeyError:
3132
3309
pass
3133
3310
3134
3311
# Clients who has passed its expire date can still be
3135
3312
# enabled if its last checker was successful. A Client
3136
3313
# whose checker succeeded before we stored its state is
3169
3346
client_name))
3170
3347
client["secret"] = (client_settings[client_name]
3171
3348
["secret"])
3172
3349
3173
3350
# Add/remove clients based on new changes made to config
3174
3351
for client_name in (set(old_client_settings)
3175
3352
- set(client_settings)):
3177
3354
for client_name in (set(client_settings)
3178
3355
- set(old_client_settings)):
3179
3356
clients_data[client_name] = client_settings[client_name]
3180
3357
3181
3358
# Create all client objects
3182
3359
for client_name, client in clients_data.items():
3183
3360
tcp_server.clients[client_name] = client_class(
3184
name = client_name,
3185
settings = client,
3186
server_settings = server_settings)
3187
3361
name=client_name,
3362
settings=client,
3363
server_settings=server_settings)
3364
3188
3365
if not tcp_server.clients:
3189
3366
logger.warning("No clients defined")
3190
3367
3191
3368
if not foreground:
3192
3369
if pidfile is not None:
3193
3370
pid = os.getpid()
3199
3376
pidfilename, pid)
3200
3377
del pidfile
3201
3378
del pidfilename
3202
3379
3203
3380
for termsig in (signal.SIGHUP, signal.SIGTERM):
3204
3381
GLib.unix_signal_add(GLib.PRIORITY_HIGH, termsig,
3205
3382
lambda: main_loop.quit() and False)
3206
3383
3207
3384
if use_dbus:
3208
3385
3209
3386
@alternate_dbus_interfaces(
3210
{ "se.recompile.Mandos": "se.bsnet.fukt.Mandos" })
3387
{"se.recompile.Mandos": "se.bsnet.fukt.Mandos"})
3211
3388
class MandosDBusService(DBusObjectWithObjectManager):
3212
3389
"""A D-Bus proxy object"""
3213
3390
3214
3391
def __init__(self):
3215
3392
dbus.service.Object.__init__(self, bus, "/")
3216
3393
3217
3394
_interface = "se.recompile.Mandos"
3218
3395
3219
3396
@dbus.service.signal(_interface, signature="o")
3220
3397
def ClientAdded(self, objpath):
3221
3398
"D-Bus signal"
3222
3399
pass
3223
3400
3224
3401
@dbus.service.signal(_interface, signature="ss")
3225
def ClientNotFound(self, fingerprint, address):
3402
def ClientNotFound(self, key_id, address):
3226
3403
"D-Bus signal"
3227
3404
pass
3228
3405
3229
3406
@dbus_annotations({"org.freedesktop.DBus.Deprecated":
3230
3407
"true"})
3231
3408
@dbus.service.signal(_interface, signature="os")
3232
3409
def ClientRemoved(self, objpath, name):
3233
3410
"D-Bus signal"
3234
3411
pass
3235
3412
3236
3413
@dbus_annotations({"org.freedesktop.DBus.Deprecated":
3237
3414
"true"})
3238
3415
@dbus.service.method(_interface, out_signature="ao")
3240
3417
"D-Bus method"
3241
3418
return dbus.Array(c.dbus_object_path for c in
3242
3419
tcp_server.clients.values())
3243
3420
3244
3421
@dbus_annotations({"org.freedesktop.DBus.Deprecated":
3245
3422
"true"})
3246
3423
@dbus.service.method(_interface,
3248
3425
def GetAllClientsWithProperties(self):
3249
3426
"D-Bus method"
3250
3427
return dbus.Dictionary(
3251
{ c.dbus_object_path: c.GetAll(
3428
{c.dbus_object_path: c.GetAll(
3252
3429
"se.recompile.Mandos.Client")
3253
for c in tcp_server.clients.values() },
3430
for c in tcp_server.clients.values()},
3254
3431
signature="oa{sv}")
3255
3432
3256
3433
@dbus.service.method(_interface, in_signature="o")
3257
3434
def RemoveClient(self, object_path):
3258
3435
"D-Bus method"
3266
3443
self.client_removed_signal(c)
3267
3444
return
3268
3445
raise KeyError(object_path)
3269
3446
3270
3447
del _interface
3271
3448
3272
3449
@dbus.service.method(dbus.OBJECT_MANAGER_IFACE,
3273
out_signature = "a{oa{sa{sv}}}")
3450
out_signature="a{oa{sa{sv}}}")
3274
3451
def GetManagedObjects(self):
3275
3452
"""D-Bus method"""
3276
3453
return dbus.Dictionary(
3277
{ client.dbus_object_path:
3278
dbus.Dictionary(
3279
{ interface: client.GetAll(interface)
3280
for interface in
3281
client._get_all_interface_names()})
3282
for client in tcp_server.clients.values()})
3283
3454
{client.dbus_object_path:
3455
dbus.Dictionary(
3456
{interface: client.GetAll(interface)
3457
for interface in
3458
client._get_all_interface_names()})
3459
for client in tcp_server.clients.values()})
3460
3284
3461
def client_added_signal(self, client):
3285
3462
"""Send the new standard signal and the old signal"""
3286
3463
if use_dbus:
3288
3465
self.InterfacesAdded(
3289
3466
client.dbus_object_path,
3290
3467
dbus.Dictionary(
3291
{ interface: client.GetAll(interface)
3292
for interface in
3293
client._get_all_interface_names()}))
3468
{interface: client.GetAll(interface)
3469
for interface in
3470
client._get_all_interface_names()}))
3294
3471
# Old signal
3295
3472
self.ClientAdded(client.dbus_object_path)
3296
3473
3297
3474
def client_removed_signal(self, client):
3298
3475
"""Send the new standard signal and the old signal"""
3299
3476
if use_dbus:
3304
3481
# Old signal
3305
3482
self.ClientRemoved(client.dbus_object_path,
3306
3483
client.name)
3307
3484
3308
3485
mandos_dbus_service = MandosDBusService()
3309
3486
3487
# Save modules to variables to exempt the modules from being
3488
# unloaded before the function registered with atexit() is run.
3489
mp = multiprocessing
3490
wn = wnull
3491
3310
3492
def cleanup():
3311
3493
"Cleanup function; run on exit"
3312
3494
if zeroconf:
3313
3495
service.cleanup()
3314
3315
multiprocessing.active_children()
3316
wnull.close()
3496
3497
mp.active_children()
3498
wn.close()
3317
3499
if not (tcp_server.clients or client_settings):
3318
3500
return
3319
3501
3320
3502
# Store client before exiting. Secrets are encrypted with key
3321
3503
# based on what config file has. If config file is
3322
3504
# removed/edited, old secret will thus be unrecovable.
3327
3509
client.encrypted_secret = pgp.encrypt(client.secret,
3328
3510
key)
3329
3511
client_dict = {}
3330
3512
3331
3513
# A list of attributes that can not be pickled
3332
3514
# + secret.
3333
exclude = { "bus", "changedstate", "secret",
3334
"checker", "server_settings" }
3515
exclude = {"bus", "changedstate", "secret",
3516
"checker", "server_settings"}
3335
3517
for name, typ in inspect.getmembers(dbus.service
3336
3518
.Object):
3337
3519
exclude.add(name)
3338
3520
3339
3521
client_dict["encrypted_secret"] = (client
3340
3522
.encrypted_secret)
3341
3523
for attr in client.client_structure:
3342
3524
if attr not in exclude:
3343
3525
client_dict[attr] = getattr(client, attr)
3344
3526
3345
3527
clients[client.name] = client_dict
3346
3528
del client_settings[client.name]["secret"]
3347
3529
3348
3530
try:
3349
3531
with tempfile.NamedTemporaryFile(
3350
3532
mode='wb',
3353
3535
dir=os.path.dirname(stored_state_path),
3354
3536
delete=False) as stored_state:
3355
3537
pickle.dump((clients, client_settings), stored_state,
3356
protocol = 2)
3538
protocol=2)
3357
3539
tempname = stored_state.name
3358
3540
os.rename(tempname, stored_state_path)
3359
3541
except (IOError, OSError) as e:
3369
3551
logger.warning("Could not save persistent state:",
3370
3552
exc_info=e)
3371
3553
raise
3372
3554
3373
3555
# Delete all clients, and settings from config
3374
3556
while tcp_server.clients:
3375
3557
name, client = tcp_server.clients.popitem()
3381
3563
if use_dbus:
3382
3564
mandos_dbus_service.client_removed_signal(client)
3383
3565
client_settings.clear()
3384
3566
3385
3567
atexit.register(cleanup)
3386
3568
3387
3569
for client in tcp_server.clients.values():
3388
3570
if use_dbus:
3389
3571
# Emit D-Bus signal for adding
3391
3573
# Need to initiate checking of clients
3392
3574
if client.enabled:
3393
3575
client.init_checker()
3394
3576
3395
3577
tcp_server.enable()
3396
3578
tcp_server.server_activate()
3397
3579
3398
3580
# Find out what port we got
3399
3581
if zeroconf:
3400
3582
service.port = tcp_server.socket.getsockname()[1]
3405
3587
else: # IPv4
3406
3588
logger.info("Now listening on address %r, port %d",
3407
3589
*tcp_server.socket.getsockname())
3408
3409
#service.interface = tcp_server.socket.getsockname()[3]
3410
3590
3591
# service.interface = tcp_server.socket.getsockname()[3]
3592
3411
3593
try:
3412
3594
if zeroconf:
3413
3595
# From the Avahi example code
3418
3600
cleanup()
3419
3601
sys.exit(1)
3420
3602
# End of Avahi example code
3421
3603
3422
3604
GLib.io_add_watch(tcp_server.fileno(), GLib.IO_IN,
3423
3605
lambda *args, **kwargs:
3424
3606
(tcp_server.handle_request
3425
3607
(*args[2:], **kwargs) or True))
3426
3608
3427
3609
logger.debug("Starting main loop")
3428
3610
main_loop.run()
3429
3611
except AvahiError as error:
Loggerhead is a web-based interface for Breezy
Version: 2.0.2.dev0