/mandos/release : revision 237.7.314

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#!/usr/bin/python

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#!/usr/bin/python2.7

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# -*- mode: python; coding: utf-8 -*-

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#

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#

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# Mandos server - give out binary blobs to connecting clients.

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#

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#

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# This program is partly derived from an example program for an Avahi

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# service publisher, downloaded from

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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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#

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# This file is part of Mandos.

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#

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# Mandos is free software: you can redistribute it and/or modify it

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# under the terms of the GNU General Public License as published by

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#

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# This program is free software: you can redistribute it and/or modify

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# it under the terms of the GNU General Public License as published by

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# 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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# Mandos is distributed in the hope that it will be useful, but

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# WITHOUT ANY WARRANTY; without even the implied warranty of

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# This program is distributed in the hope that it will be useful,

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# but WITHOUT ANY WARRANTY; without even the implied warranty of

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# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the

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# GNU General Public License for more details.

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#

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#

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# You should have received a copy of the GNU General Public License

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# along with Mandos. If not, see <http://www.gnu.org/licenses/>.

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#

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# along with this program. If not, see

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# <http://www.gnu.org/licenses/>.

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#

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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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try:

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from future_builtins import *

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except ImportError:

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pass

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from future_builtins import *

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try:

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import SocketServer as socketserver

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import argparse

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import datetime

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import errno

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import gnutls.crypto

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import gnutls.connection

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import gnutls.errors

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import gnutls.library.functions

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import gnutls.library.constants

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import gnutls.library.types

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try:

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import ConfigParser as configparser

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except ImportError:

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import dbus

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import dbus.service

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import gi

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from gi.repository import GLib

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try:

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import gobject

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except ImportError:

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from gi.repository import GObject as gobject

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import avahi

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from dbus.mainloop.glib import DBusGMainLoop

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import ctypes

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import ctypes.util

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import xml.dom.minidom

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import inspect

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if sys.version_info.major == 2:

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__metaclass__ = type

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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

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# 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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# In Python 2.7 it seems to have been removed entirely.

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# Try running the C preprocessor:

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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(

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"#include <sys/socket.h>\nSO_BINDTODEVICE\n")[0]

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SO_BINDTODEVICE = int(stdout.splitlines()[-1])

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except (OSError, ValueError, IndexError):

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# No value found

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SO_BINDTODEVICE = None

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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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if sys.version_info < (3, 2):

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configparser.Configparser = configparser.SafeConfigParser

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version = "1.8.7"

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version = "1.6.9"

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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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return interface_index

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def copy_function(func):

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"""Make a copy of a function"""

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if sys.version_info.major == 2:

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return types.FunctionType(func.func_code,

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func.func_globals,

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func.func_name,

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func.func_defaults,

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func.func_closure)

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else:

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return types.FunctionType(func.__code__,

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func.__globals__,

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func.__name__,

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func.__defaults__,

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func.__closure__)

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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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pass

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class PGPEngine:

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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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try:

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output = subprocess.check_output(["gpgconf"])

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for line in output.splitlines():

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name, text, path = line.split(b":")

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if name == "gpg":

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self.gpg = path

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break

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except OSError as e:

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if e.errno != errno.ENOENT:

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raise

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self.gnupgargs = ['--batch',

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'--homedir', self.tempdir,

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'--home', self.tempdir,

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'--force-mdc',

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'--quiet']

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# Only GPG version 1 has the --no-use-agent option.

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if self.gpg == "gpg" or self.gpg.endswith("/gpg"):

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self.gnupgargs.append("--no-use-agent")

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'--quiet',

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'--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):

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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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201

passphrase = self.password_encode(password)

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with tempfile.NamedTemporaryFile(

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dir=self.tempdir) as passfile:

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passfile.write(passphrase)

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passfile.flush()

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proc = subprocess.Popen([self.gpg, '--symmetric',

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proc = subprocess.Popen(['gpg', '--symmetric',

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'--passphrase-file',

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passfile.name]

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+ self.gnupgargs,

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stdin=subprocess.PIPE,

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stdout=subprocess.PIPE,

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stderr=subprocess.PIPE)

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ciphertext, err = proc.communicate(input=data)

210

stdin = subprocess.PIPE,

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stdout = subprocess.PIPE,

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stderr = subprocess.PIPE)

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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

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265

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def decrypt(self, data, password):

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219

passphrase = self.password_encode(password)

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with tempfile.NamedTemporaryFile(

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dir=self.tempdir) as passfile:

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dir = self.tempdir) as passfile:

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passfile.write(passphrase)

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passfile.flush()

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proc = subprocess.Popen([self.gpg, '--decrypt',

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proc = subprocess.Popen(['gpg', '--decrypt',

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'--passphrase-file',

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passfile.name]

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+ self.gnupgargs,

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stdin=subprocess.PIPE,

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stdout=subprocess.PIPE,

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stderr=subprocess.PIPE)

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decrypted_plaintext, err = proc.communicate(input=data)

228

stdin = subprocess.PIPE,

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stdout = subprocess.PIPE,

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stderr = subprocess.PIPE)

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decrypted_plaintext, 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 decrypted_plaintext

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283

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# Pretend that we have an Avahi module

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class avahi:

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"""This isn't so much a class as it is a module-like namespace."""

287

IF_UNSPEC = -1 # avahi-common/address.h

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PROTO_UNSPEC = -1 # avahi-common/address.h

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PROTO_INET = 0 # avahi-common/address.h

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PROTO_INET6 = 1 # avahi-common/address.h

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DBUS_NAME = "org.freedesktop.Avahi"

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DBUS_INTERFACE_ENTRY_GROUP = DBUS_NAME + ".EntryGroup"

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DBUS_INTERFACE_SERVER = DBUS_NAME + ".Server"

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DBUS_PATH_SERVER = "/"

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296

@staticmethod

297

def string_array_to_txt_array(t):

298

return dbus.Array((dbus.ByteArray(s.encode("utf-8"))

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for s in t), signature="ay")

300

ENTRY_GROUP_ESTABLISHED = 2 # avahi-common/defs.h

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ENTRY_GROUP_COLLISION = 3 # avahi-common/defs.h

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ENTRY_GROUP_FAILURE = 4 # avahi-common/defs.h

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SERVER_INVALID = 0 # avahi-common/defs.h

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SERVER_REGISTERING = 1 # avahi-common/defs.h

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SERVER_RUNNING = 2 # avahi-common/defs.h

306

SERVER_COLLISION = 3 # avahi-common/defs.h

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SERVER_FAILURE = 4 # avahi-common/defs.h

308

309

310

237

class AvahiError(Exception):

311

238

def __init__(self, value, *args, **kwargs):

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self.value = value

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pass

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class AvahiService:

252

class AvahiService(object):

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"""An Avahi (Zeroconf) service.

327

254

328

255

Attributes:

329

256

interface: integer; avahi.IF_UNSPEC or an interface index.

330

257

Used to optionally bind to the specified interface.

342

269

server: D-Bus Server

343

270

bus: dbus.SystemBus()

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271

"""

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def __init__(self,

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interface=avahi.IF_UNSPEC,

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name=None,

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servicetype=None,

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port=None,

351

TXT=None,

352

domain="",

353

host="",

354

max_renames=32768,

355

protocol=avahi.PROTO_UNSPEC,

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bus=None):

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interface = avahi.IF_UNSPEC,

275

name = None,

276

servicetype = None,

277

port = None,

278

TXT = None,

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domain = "",

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host = "",

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max_renames = 32768,

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protocol = avahi.PROTO_UNSPEC,

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bus = None):

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self.interface = interface

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285

self.name = name

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286

self.type = servicetype

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self.server = None

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self.bus = bus

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297

self.entry_group_state_changed_match = None

371

298

372

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def rename(self, remove=True):

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"""Derived from the Avahi example code"""

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if self.rename_count >= self.max_renames:

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logger.critical("D-Bus Exception", exc_info=error)

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self.cleanup()

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os._exit(1)

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324

398

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def remove(self):

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"""Derived from the Avahi example code"""

400

327

if self.entry_group_state_changed_match is not None:

402

329

self.entry_group_state_changed_match = None

403

330

if self.group is not None:

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331

self.group.Reset()

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332

406

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def add(self):

407

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"""Derived from the Avahi example code"""

408

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self.remove()

425

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dbus.UInt16(self.port),

426

353

avahi.string_array_to_txt_array(self.TXT))

427

354

self.group.Commit()

428

355

429

356

def entry_group_state_changed(self, state, error):

430

357

"""Derived from the Avahi example code"""

431

358

logger.debug("Avahi entry group state change: %i", state)

432

359

433

360

if state == avahi.ENTRY_GROUP_ESTABLISHED:

434

361

logger.debug("Zeroconf service established.")

435

362

elif state == avahi.ENTRY_GROUP_COLLISION:

439

366

logger.critical("Avahi: Error in group state changed %s",

440

367

str(error))

441

368

raise AvahiGroupError("State changed: {!s}".format(error))

442

369

443

370

def cleanup(self):

444

371

"""Derived from the Avahi example code"""

445

372

if self.group is not None:

450

377

pass

451

378

self.group = None

452

379

self.remove()

453

380

454

381

def server_state_changed(self, state, error=None):

455

382

"""Derived from the Avahi example code"""

456

383

logger.debug("Avahi server state change: %i", state)

468

395

logger.error(bad_states[state] + ": %r", error)

469

396

self.cleanup()

470

397

elif state == avahi.SERVER_RUNNING:

471

try:

472

self.add()

473

except dbus.exceptions.DBusException as error:

474

if (error.get_dbus_name()

475

== "org.freedesktop.Avahi.CollisionError"):

476

logger.info("Local Zeroconf service name"

477

" collision.")

478

return self.rename(remove=False)

479

else:

480

logger.critical("D-Bus Exception", exc_info=error)

481

self.cleanup()

482

os._exit(1)

398

self.add()

483

399

else:

484

400

if error is None:

485

401

logger.debug("Unknown state: %r", state)

486

402

else:

487

403

logger.debug("Unknown state: %r: %r", state, error)

488

404

489

405

def activate(self):

490

406

"""Derived from the Avahi example code"""

491

407

if self.server is None:

502

418

class AvahiServiceToSyslog(AvahiService):

503

419

def rename(self, *args, **kwargs):

504

420

"""Add the new name to the syslog messages"""

505

ret = super(AvahiServiceToSyslog, self).rename(*args, **kwargs)

421

ret = AvahiService.rename(self, *args, **kwargs)

506

422

syslogger.setFormatter(logging.Formatter(

507

423

'Mandos ({}) [%(process)d]: %(levelname)s: %(message)s'

508

424

.format(self.name)))

509

425

return ret

510

426

511

512

# Pretend that we have a GnuTLS module

513

class gnutls:

514

"""This isn't so much a class as it is a module-like namespace."""

515

516

library = ctypes.util.find_library("gnutls")

517

if library is None:

518

library = ctypes.util.find_library("gnutls-deb0")

519

_library = ctypes.cdll.LoadLibrary(library)

520

del library

521

522

# Unless otherwise indicated, the constants and types below are

523

# all from the gnutls/gnutls.h C header file.

524

525

# Constants

526

E_SUCCESS = 0

527

E_INTERRUPTED = -52

528

E_AGAIN = -28

529

CRT_OPENPGP = 2

530

CRT_RAWPK = 3

531

CLIENT = 2

532

SHUT_RDWR = 0

533

CRD_CERTIFICATE = 1

534

E_NO_CERTIFICATE_FOUND = -49

535

X509_FMT_DER = 0

536

NO_TICKETS = 1<<10

537

ENABLE_RAWPK = 1<<18

538

CTYPE_PEERS = 3

539

KEYID_USE_SHA256 = 1 # gnutls/x509.h

540

OPENPGP_FMT_RAW = 0 # gnutls/openpgp.h

541

542

# Types

543

class session_int(ctypes.Structure):

544

_fields_ = []

545

session_t = ctypes.POINTER(session_int)

546

547

class certificate_credentials_st(ctypes.Structure):

548

_fields_ = []

549

certificate_credentials_t = ctypes.POINTER(

550

certificate_credentials_st)

551

certificate_type_t = ctypes.c_int

552

553

class datum_t(ctypes.Structure):

554

_fields_ = [('data', ctypes.POINTER(ctypes.c_ubyte)),

555

('size', ctypes.c_uint)]

556

557

class openpgp_crt_int(ctypes.Structure):

558

_fields_ = []

559

openpgp_crt_t = ctypes.POINTER(openpgp_crt_int)

560

openpgp_crt_fmt_t = ctypes.c_int # gnutls/openpgp.h

561

log_func = ctypes.CFUNCTYPE(None, ctypes.c_int, ctypes.c_char_p)

562

credentials_type_t = ctypes.c_int

563

transport_ptr_t = ctypes.c_void_p

564

close_request_t = ctypes.c_int

565

566

# Exceptions

567

class Error(Exception):

568

def __init__(self, message=None, code=None, args=()):

569

# Default usage is by a message string, but if a return

570

# code is passed, convert it to a string with

571

# gnutls.strerror()

572

self.code = code

573

if message is None and code is not None:

574

message = gnutls.strerror(code)

575

return super(gnutls.Error, self).__init__(

576

message, *args)

577

578

class CertificateSecurityError(Error):

579

pass

580

581

# Classes

582

class Credentials:

583

def __init__(self):

584

self._c_object = gnutls.certificate_credentials_t()

585

gnutls.certificate_allocate_credentials(

586

ctypes.byref(self._c_object))

587

self.type = gnutls.CRD_CERTIFICATE

588

589

def __del__(self):

590

gnutls.certificate_free_credentials(self._c_object)

591

592

class ClientSession:

593

def __init__(self, socket, credentials=None):

594

self._c_object = gnutls.session_t()

595

gnutls_flags = gnutls.CLIENT

596

if gnutls.check_version(b"3.5.6"):

597

gnutls_flags |= gnutls.NO_TICKETS

598

if gnutls.has_rawpk:

599

gnutls_flags |= gnutls.ENABLE_RAWPK

600

gnutls.init(ctypes.byref(self._c_object), gnutls_flags)

601

del gnutls_flags

602

gnutls.set_default_priority(self._c_object)

603

gnutls.transport_set_ptr(self._c_object, socket.fileno())

604

gnutls.handshake_set_private_extensions(self._c_object,

605

True)

606

self.socket = socket

607

if credentials is None:

608

credentials = gnutls.Credentials()

609

gnutls.credentials_set(self._c_object, credentials.type,

610

ctypes.cast(credentials._c_object,

611

ctypes.c_void_p))

612

self.credentials = credentials

613

614

def __del__(self):

615

gnutls.deinit(self._c_object)

616

617

def handshake(self):

618

return gnutls.handshake(self._c_object)

619

620

def send(self, data):

621

data = bytes(data)

622

data_len = len(data)

623

while data_len > 0:

624

data_len -= gnutls.record_send(self._c_object,

625

data[-data_len:],

626

data_len)

627

628

def bye(self):

629

return gnutls.bye(self._c_object, gnutls.SHUT_RDWR)

630

631

# Error handling functions

632

def _error_code(result):

633

"""A function to raise exceptions on errors, suitable

634

for the 'restype' attribute on ctypes functions"""

635

if result >= 0:

636

return result

637

if result == gnutls.E_NO_CERTIFICATE_FOUND:

638

raise gnutls.CertificateSecurityError(code=result)

639

raise gnutls.Error(code=result)

640

641

def _retry_on_error(result, func, arguments):

642

"""A function to retry on some errors, suitable

643

for the 'errcheck' attribute on ctypes functions"""

644

while result < 0:

645

if result not in (gnutls.E_INTERRUPTED, gnutls.E_AGAIN):

646

return _error_code(result)

647

result = func(*arguments)

648

return result

649

650

# Unless otherwise indicated, the function declarations below are

651

# all from the gnutls/gnutls.h C header file.

652

653

# Functions

654

priority_set_direct = _library.gnutls_priority_set_direct

655

priority_set_direct.argtypes = [session_t, ctypes.c_char_p,

656

ctypes.POINTER(ctypes.c_char_p)]

657

priority_set_direct.restype = _error_code

658

659

init = _library.gnutls_init

660

init.argtypes = [ctypes.POINTER(session_t), ctypes.c_int]

661

init.restype = _error_code

662

663

set_default_priority = _library.gnutls_set_default_priority

664

set_default_priority.argtypes = [session_t]

665

set_default_priority.restype = _error_code

666

667

record_send = _library.gnutls_record_send

668

record_send.argtypes = [session_t, ctypes.c_void_p,

669

ctypes.c_size_t]

670

record_send.restype = ctypes.c_ssize_t

671

record_send.errcheck = _retry_on_error

672

673

certificate_allocate_credentials = (

674

_library.gnutls_certificate_allocate_credentials)

675

certificate_allocate_credentials.argtypes = [

676

ctypes.POINTER(certificate_credentials_t)]

677

certificate_allocate_credentials.restype = _error_code

678

679

certificate_free_credentials = (

680

_library.gnutls_certificate_free_credentials)

681

certificate_free_credentials.argtypes = [

682

certificate_credentials_t]

683

certificate_free_credentials.restype = None

684

685

handshake_set_private_extensions = (

686

_library.gnutls_handshake_set_private_extensions)

687

handshake_set_private_extensions.argtypes = [session_t,

688

ctypes.c_int]

689

handshake_set_private_extensions.restype = None

690

691

credentials_set = _library.gnutls_credentials_set

692

credentials_set.argtypes = [session_t, credentials_type_t,

693

ctypes.c_void_p]

694

credentials_set.restype = _error_code

695

696

strerror = _library.gnutls_strerror

697

strerror.argtypes = [ctypes.c_int]

698

strerror.restype = ctypes.c_char_p

699

700

certificate_type_get = _library.gnutls_certificate_type_get

701

certificate_type_get.argtypes = [session_t]

702

certificate_type_get.restype = _error_code

703

704

certificate_get_peers = _library.gnutls_certificate_get_peers

705

certificate_get_peers.argtypes = [session_t,

706

ctypes.POINTER(ctypes.c_uint)]

707

certificate_get_peers.restype = ctypes.POINTER(datum_t)

708

709

global_set_log_level = _library.gnutls_global_set_log_level

710

global_set_log_level.argtypes = [ctypes.c_int]

711

global_set_log_level.restype = None

712

713

global_set_log_function = _library.gnutls_global_set_log_function

714

global_set_log_function.argtypes = [log_func]

715

global_set_log_function.restype = None

716

717

deinit = _library.gnutls_deinit

718

deinit.argtypes = [session_t]

719

deinit.restype = None

720

721

handshake = _library.gnutls_handshake

722

handshake.argtypes = [session_t]

723

handshake.restype = _error_code

724

handshake.errcheck = _retry_on_error

725

726

transport_set_ptr = _library.gnutls_transport_set_ptr

727

transport_set_ptr.argtypes = [session_t, transport_ptr_t]

728

transport_set_ptr.restype = None

729

730

bye = _library.gnutls_bye

731

bye.argtypes = [session_t, close_request_t]

732

bye.restype = _error_code

733

bye.errcheck = _retry_on_error

734

735

check_version = _library.gnutls_check_version

736

check_version.argtypes = [ctypes.c_char_p]

737

check_version.restype = ctypes.c_char_p

738

739

_need_version = b"3.3.0"

740

if check_version(_need_version) is None:

741

raise self.Error("Needs GnuTLS {} or later"

742

.format(_need_version))

743

744

_tls_rawpk_version = b"3.6.6"

745

has_rawpk = bool(check_version(_tls_rawpk_version))

746

747

if has_rawpk:

748

# Types

749

class pubkey_st(ctypes.Structure):

750

_fields = []

751

pubkey_t = ctypes.POINTER(pubkey_st)

752

753

x509_crt_fmt_t = ctypes.c_int

754

755

# All the function declarations below are from gnutls/abstract.h

756

pubkey_init = _library.gnutls_pubkey_init

757

pubkey_init.argtypes = [ctypes.POINTER(pubkey_t)]

758

pubkey_init.restype = _error_code

759

760

pubkey_import = _library.gnutls_pubkey_import

761

pubkey_import.argtypes = [pubkey_t, ctypes.POINTER(datum_t),

762

x509_crt_fmt_t]

763

pubkey_import.restype = _error_code

764

765

pubkey_get_key_id = _library.gnutls_pubkey_get_key_id

766

pubkey_get_key_id.argtypes = [pubkey_t, ctypes.c_int,

767

ctypes.POINTER(ctypes.c_ubyte),

768

ctypes.POINTER(ctypes.c_size_t)]

769

pubkey_get_key_id.restype = _error_code

770

771

pubkey_deinit = _library.gnutls_pubkey_deinit

772

pubkey_deinit.argtypes = [pubkey_t]

773

pubkey_deinit.restype = None

774

else:

775

# All the function declarations below are from gnutls/openpgp.h

776

777

openpgp_crt_init = _library.gnutls_openpgp_crt_init

778

openpgp_crt_init.argtypes = [ctypes.POINTER(openpgp_crt_t)]

779

openpgp_crt_init.restype = _error_code

780

781

openpgp_crt_import = _library.gnutls_openpgp_crt_import

782

openpgp_crt_import.argtypes = [openpgp_crt_t,

783

ctypes.POINTER(datum_t),

784

openpgp_crt_fmt_t]

785

openpgp_crt_import.restype = _error_code

786

787

openpgp_crt_verify_self = _library.gnutls_openpgp_crt_verify_self

788

openpgp_crt_verify_self.argtypes = [openpgp_crt_t, ctypes.c_uint,

789

ctypes.POINTER(ctypes.c_uint)]

790

openpgp_crt_verify_self.restype = _error_code

791

792

openpgp_crt_deinit = _library.gnutls_openpgp_crt_deinit

793

openpgp_crt_deinit.argtypes = [openpgp_crt_t]

794

openpgp_crt_deinit.restype = None

795

796

openpgp_crt_get_fingerprint = (

797

_library.gnutls_openpgp_crt_get_fingerprint)

798

openpgp_crt_get_fingerprint.argtypes = [openpgp_crt_t,

799

ctypes.c_void_p,

800

ctypes.POINTER(

801

ctypes.c_size_t)]

802

openpgp_crt_get_fingerprint.restype = _error_code

803

804

if check_version(b"3.6.4"):

805

certificate_type_get2 = _library.gnutls_certificate_type_get2

806

certificate_type_get2.argtypes = [session_t, ctypes.c_int]

807

certificate_type_get2.restype = _error_code

808

809

# Remove non-public functions

810

del _error_code, _retry_on_error

811

812

813

427

def call_pipe(connection, # : multiprocessing.Connection

814

428

func, *args, **kwargs):

815

429

"""This function is meant to be called by multiprocessing.Process

816

430

817

431

This function runs func(*args, **kwargs), and writes the resulting

818

432

return value on the provided multiprocessing.Connection.

819

433

"""

820

434

connection.send(func(*args, **kwargs))

821

435

connection.close()

822

436

823

824

class Client:

437

class Client(object):

825

438

"""A representation of a client host served by this server.

826

439

827

440

Attributes:

828

441

approved: bool(); 'None' if not yet approved/disapproved

829

442

approval_delay: datetime.timedelta(); Time to wait for approval

830

443

approval_duration: datetime.timedelta(); Duration of one approval

831

checker: multiprocessing.Process(); a running checker process used

832

to see if the client lives. 'None' if no process is

833

running.

834

checker_callback_tag: a GLib event source tag, or None

444

checker: subprocess.Popen(); a running checker process used

445

to see if the client lives.

446

'None' if no process is running.

447

checker_callback_tag: a gobject event source tag, or None

835

448

checker_command: string; External command which is run to check

836

449

if client lives. %() expansions are done at

837

450

runtime with vars(self) as dict, so that for

838

451

instance %(name)s can be used in the command.

839

checker_initiator_tag: a GLib event source tag, or None

452

checker_initiator_tag: a gobject event source tag, or None

840

453

created: datetime.datetime(); (UTC) object creation

841

454

client_structure: Object describing what attributes a client has

842

455

and is used for storing the client at exit

843

456

current_checker_command: string; current running checker_command

844

disable_initiator_tag: a GLib event source tag, or None

457

disable_initiator_tag: a gobject event source tag, or None

845

458

enabled: bool()

846

459

fingerprint: string (40 or 32 hexadecimal digits); used to

847

uniquely identify an OpenPGP client

848

key_id: string (64 hexadecimal digits); used to uniquely identify

849

a client using raw public keys

460

uniquely identify the client

850

461

host: string; available for use by the checker command

851

462

interval: datetime.timedelta(); How often to start a new checker

852

463

last_approval_request: datetime.datetime(); (UTC) or None

868

479

disabled, or None

869

480

server_settings: The server_settings dict from main()

870

481

"""

871

482

872

483

runtime_expansions = ("approval_delay", "approval_duration",

873

"created", "enabled", "expires", "key_id",

484

"created", "enabled", "expires",

874

485

"fingerprint", "host", "interval",

875

486

"last_approval_request", "last_checked_ok",

876

487

"last_enabled", "name", "timeout")

885

496

"approved_by_default": "True",

886

497

"enabled": "True",

887

498

}

888

499

889

500

@staticmethod

890

501

def config_parser(config):

891

502

"""Construct a new dict of client settings of this form:

898

509

for client_name in config.sections():

899

510

section = dict(config.items(client_name))

900

511

client = settings[client_name] = {}

901

512

902

513

client["host"] = section["host"]

903

514

# Reformat values from string types to Python types

904

515

client["approved_by_default"] = config.getboolean(

905

516

client_name, "approved_by_default")

906

517

client["enabled"] = config.getboolean(client_name,

907

518

"enabled")

908

909

# Uppercase and remove spaces from key_id and fingerprint

910

# for later comparison purposes with return value from the

911

# key_id() and fingerprint() functions

912

client["key_id"] = (section.get("key_id", "").upper()

913

.replace(" ", ""))

519

520

# Uppercase and remove spaces from fingerprint for later

521

# comparison purposes with return value from the

522

# fingerprint() function

914

523

client["fingerprint"] = (section["fingerprint"].upper()

915

524

.replace(" ", ""))

916

525

if "secret" in section:

917

client["secret"] = codecs.decode(section["secret"]

918

.encode("utf-8"),

919

"base64")

526

client["secret"] = section["secret"].decode("base64")

920

527

elif "secfile" in section:

921

528

with open(os.path.expanduser(os.path.expandvars

922

529

(section["secfile"])),

937

544

client["last_approval_request"] = None

938

545

client["last_checked_ok"] = None

939

546

client["last_checker_status"] = -2

940

547

941

548

return settings

942

943

def __init__(self, settings, name=None, server_settings=None):

549

550

def __init__(self, settings, name = None, server_settings=None):

944

551

self.name = name

945

552

if server_settings is None:

946

553

server_settings = {}

948

555

# adding all client settings

949

556

for setting, value in settings.items():

950

557

setattr(self, setting, value)

951

558

952

559

if self.enabled:

953

560

if not hasattr(self, "last_enabled"):

954

561

self.last_enabled = datetime.datetime.utcnow()

958

565

else:

959

566

self.last_enabled = None

960

567

self.expires = None

961

568

962

569

logger.debug("Creating client %r", self.name)

963

logger.debug(" Key ID: %s", self.key_id)

964

570

logger.debug(" Fingerprint: %s", self.fingerprint)

965

571

self.created = settings.get("created",

966

572

datetime.datetime.utcnow())

967

573

968

574

# attributes specific for this server instance

969

575

self.checker = None

970

576

self.checker_initiator_tag = None

976

582

self.changedstate = multiprocessing_manager.Condition(

977

583

multiprocessing_manager.Lock())

978

584

self.client_structure = [attr

979

for attr in self.__dict__.keys()

585

for attr in self.__dict__.iterkeys()

980

586

if not attr.startswith("_")]

981

587

self.client_structure.append("client_structure")

982

588

983

589

for name, t in inspect.getmembers(

984

590

type(self), lambda obj: isinstance(obj, property)):

985

591

if not name.startswith("_"):

986

592

self.client_structure.append(name)

987

593

988

594

# Send notice to process children that client state has changed

989

595

def send_changedstate(self):

990

596

with self.changedstate:

991

597

self.changedstate.notify_all()

992

598

993

599

def enable(self):

994

600

"""Start this client's checker and timeout hooks"""

995

601

if getattr(self, "enabled", False):

1000

606

self.last_enabled = datetime.datetime.utcnow()

1001

607

self.init_checker()

1002

608

self.send_changedstate()

1003

609

1004

610

def disable(self, quiet=True):

1005

611

"""Disable this client."""

1006

612

if not getattr(self, "enabled", False):

1008

614

if not quiet:

1009

615

logger.info("Disabling client %s", self.name)

1010

616

if getattr(self, "disable_initiator_tag", None) is not None:

1011

GLib.source_remove(self.disable_initiator_tag)

617

gobject.source_remove(self.disable_initiator_tag)

1012

618

self.disable_initiator_tag = None

1013

619

self.expires = None

1014

620

if getattr(self, "checker_initiator_tag", None) is not None:

1015

GLib.source_remove(self.checker_initiator_tag)

621

gobject.source_remove(self.checker_initiator_tag)

1016

622

self.checker_initiator_tag = None

1017

623

self.stop_checker()

1018

624

self.enabled = False

1019

625

if not quiet:

1020

626

self.send_changedstate()

1021

# Do not run this again if called by a GLib.timeout_add

627

# Do not run this again if called by a gobject.timeout_add

1022

628

return False

1023

629

1024

630

def __del__(self):

1025

631

self.disable()

1026

632

1027

633

def init_checker(self):

1028

634

# Schedule a new checker to be started an 'interval' from now,

1029

635

# and every interval from then on.

1030

636

if self.checker_initiator_tag is not None:

1031

GLib.source_remove(self.checker_initiator_tag)

1032

self.checker_initiator_tag = GLib.timeout_add(

637

gobject.source_remove(self.checker_initiator_tag)

638

self.checker_initiator_tag = gobject.timeout_add(

1033

639

int(self.interval.total_seconds() * 1000),

1034

640

self.start_checker)

1035

641

# Schedule a disable() when 'timeout' has passed

1036

642

if self.disable_initiator_tag is not None:

1037

GLib.source_remove(self.disable_initiator_tag)

1038

self.disable_initiator_tag = GLib.timeout_add(

643

gobject.source_remove(self.disable_initiator_tag)

644

self.disable_initiator_tag = gobject.timeout_add(

1039

645

int(self.timeout.total_seconds() * 1000), self.disable)

1040

646

# Also start a new checker *right now*.

1041

647

self.start_checker()

1042

648

1043

649

def checker_callback(self, source, condition, connection,

1044

650

command):

1045

651

"""The checker has completed, so take appropriate actions."""

652

self.checker_callback_tag = None

653

self.checker = None

1046

654

# Read return code from connection (see call_pipe)

1047

655

returncode = connection.recv()

1048

656

connection.close()

1049

self.checker.join()

1050

self.checker_callback_tag = None

1051

self.checker = None

1052

657

1053

658

if returncode >= 0:

1054

659

self.last_checker_status = returncode

1055

660

self.last_checker_signal = None

1065

670

logger.warning("Checker for %(name)s crashed?",

1066

671

vars(self))

1067

672

return False

1068

673

1069

674

def checked_ok(self):

1070

675

"""Assert that the client has been seen, alive and well."""

1071

676

self.last_checked_ok = datetime.datetime.utcnow()

1072

677

self.last_checker_status = 0

1073

678

self.last_checker_signal = None

1074

679

self.bump_timeout()

1075

680

1076

681

def bump_timeout(self, timeout=None):

1077

682

"""Bump up the timeout for this client."""

1078

683

if timeout is None:

1079

684

timeout = self.timeout

1080

685

if self.disable_initiator_tag is not None:

1081

GLib.source_remove(self.disable_initiator_tag)

686

gobject.source_remove(self.disable_initiator_tag)

1082

687

self.disable_initiator_tag = None

1083

688

if getattr(self, "enabled", False):

1084

self.disable_initiator_tag = GLib.timeout_add(

689

self.disable_initiator_tag = gobject.timeout_add(

1085

690

int(timeout.total_seconds() * 1000), self.disable)

1086

691

self.expires = datetime.datetime.utcnow() + timeout

1087

692

1088

693

def need_approval(self):

1089

694

self.last_approval_request = datetime.datetime.utcnow()

1090

695

1091

696

def start_checker(self):

1092

697

"""Start a new checker subprocess if one is not running.

1093

698

1094

699

If a checker already exists, leave it running and do

1095

700

nothing."""

1096

701

# The reason for not killing a running checker is that if we

1101

706

# checkers alone, the checker would have to take more time

1102

707

# than 'timeout' for the client to be disabled, which is as it

1103

708

# should be.

1104

709

1105

710

if self.checker is not None and not self.checker.is_alive():

1106

711

logger.warning("Checker was not alive; joining")

1107

712

self.checker.join()

1111

716

# Escape attributes for the shell

1112

717

escaped_attrs = {

1113

718

attr: re.escape(str(getattr(self, attr)))

1114

for attr in self.runtime_expansions}

719

for attr in self.runtime_expansions }

1115

720

try:

1116

721

command = self.checker_command % escaped_attrs

1117

722

except TypeError as error:

1129

734

# The exception is when not debugging but nevertheless

1130

735

# running in the foreground; use the previously

1131

736

# created wnull.

1132

popen_args = {"close_fds": True,

1133

"shell": True,

1134

"cwd": "/"}

737

popen_args = { "close_fds": True,

738

"shell": True,

739

"cwd": "/" }

1135

740

if (not self.server_settings["debug"]

1136

741

and self.server_settings["foreground"]):

1137

742

popen_args.update({"stdout": wnull,

1138

"stderr": wnull})

1139

pipe = multiprocessing.Pipe(duplex=False)

743

"stderr": wnull })

744

pipe = multiprocessing.Pipe(duplex = False)

1140

745

self.checker = multiprocessing.Process(

1141

target=call_pipe,

1142

args=(pipe[1], subprocess.call, command),

1143

kwargs=popen_args)

746

target = call_pipe,

747

args = (pipe[1], subprocess.call, command),

748

kwargs = popen_args)

1144

749

self.checker.start()

1145

self.checker_callback_tag = GLib.io_add_watch(

1146

pipe[0].fileno(), GLib.IO_IN,

750

self.checker_callback_tag = gobject.io_add_watch(

751

pipe[0].fileno(), gobject.IO_IN,

1147

752

self.checker_callback, pipe[0], command)

1148

# Re-run this periodically if run by GLib.timeout_add

753

# Re-run this periodically if run by gobject.timeout_add

1149

754

return True

1150

755

1151

756

def stop_checker(self):

1152

757

"""Force the checker process, if any, to stop."""

1153

758

if self.checker_callback_tag:

1154

GLib.source_remove(self.checker_callback_tag)

759

gobject.source_remove(self.checker_callback_tag)

1155

760

self.checker_callback_tag = None

1156

761

if getattr(self, "checker", None) is None:

1157

762

return

1166

771

byte_arrays=False):

1167

772

"""Decorators for marking methods of a DBusObjectWithProperties to

1168

773

become properties on the D-Bus.

1169

774

1170

775

The decorated method will be called with no arguments by "Get"

1171

776

and with one argument by "Set".

1172

777

1173

778

The parameters, where they are supported, are the same as

1174

779

dbus.service.method, except there is only "signature", since the

1175

780

type from Get() and the type sent to Set() is the same.

1179

784

if byte_arrays and signature != "ay":

1180

785

raise ValueError("Byte arrays not supported for non-'ay'"

1181

786

" signature {!r}".format(signature))

1182

787

1183

788

def decorator(func):

1184

789

func._dbus_is_property = True

1185

790

func._dbus_interface = dbus_interface

1188

793

func._dbus_name = func.__name__

1189

794

if func._dbus_name.endswith("_dbus_property"):

1190

795

func._dbus_name = func._dbus_name[:-14]

1191

func._dbus_get_args_options = {'byte_arrays': byte_arrays}

796

func._dbus_get_args_options = {'byte_arrays': byte_arrays }

1192

797

return func

1193

798

1194

799

return decorator

1195

800

1196

801

1197

802

def dbus_interface_annotations(dbus_interface):

1198

803

"""Decorator for marking functions returning interface annotations

1199

804

1200

805

Usage:

1201

806

1202

807

@dbus_interface_annotations("org.example.Interface")

1203

808

def _foo(self): # Function name does not matter

1204

809

return {"org.freedesktop.DBus.Deprecated": "true",

1205

810

"org.freedesktop.DBus.Property.EmitsChangedSignal":

1206

811

"false"}

1207

812

"""

1208

813

1209

814

def decorator(func):

1210

815

func._dbus_is_interface = True

1211

816

func._dbus_interface = dbus_interface

1212

817

func._dbus_name = dbus_interface

1213

818

return func

1214

819

1215

820

return decorator

1216

821

1217

822

1218

823

def dbus_annotations(annotations):

1219

824

"""Decorator to annotate D-Bus methods, signals or properties

1220

825

Usage:

1221

826

1222

827

@dbus_annotations({"org.freedesktop.DBus.Deprecated": "true",

1223

828

"org.freedesktop.DBus.Property."

1224

829

"EmitsChangedSignal": "false"})

1226

831

access="r")

1227

832

def Property_dbus_property(self):

1228

833

return dbus.Boolean(False)

1229

1230

See also the DBusObjectWithAnnotations class.

1231

834

"""

1232

835

1233

836

def decorator(func):

1234

837

func._dbus_annotations = annotations

1235

838

return func

1236

839

1237

840

return decorator

1238

841

1239

842

1255

858

pass

1256

859

1257

860

1258

class DBusObjectWithAnnotations(dbus.service.Object):

1259

"""A D-Bus object with annotations.

1260

1261

Classes inheriting from this can use the dbus_annotations

1262

decorator to add annotations to methods or signals.

861

class DBusObjectWithProperties(dbus.service.Object):

862

"""A D-Bus object with properties.

863

864

Classes inheriting from this can use the dbus_service_property

865

decorator to expose methods as D-Bus properties. It exposes the

866

standard Get(), Set(), and GetAll() methods on the D-Bus.

1263

867

"""

1264

868

1265

869

@staticmethod

1266

870

def _is_dbus_thing(thing):

1267

871

"""Returns a function testing if an attribute is a D-Bus thing

1268

872

1269

873

If called like _is_dbus_thing("method") it returns a function

1270

874

suitable for use as predicate to inspect.getmembers().

1271

875

"""

1272

876

return lambda obj: getattr(obj, "_dbus_is_{}".format(thing),

1273

877

False)

1274

878

1275

879

def _get_all_dbus_things(self, thing):

1276

880

"""Returns a generator of (name, attribute) pairs

1277

881

"""

1280

884

for cls in self.__class__.__mro__

1281

885

for name, athing in

1282

886

inspect.getmembers(cls, self._is_dbus_thing(thing)))

1283

1284

@dbus.service.method(dbus.INTROSPECTABLE_IFACE,

1285

out_signature="s",

1286

path_keyword='object_path',

1287

connection_keyword='connection')

1288

def Introspect(self, object_path, connection):

1289

"""Overloading of standard D-Bus method.

1290

1291

Inserts annotation tags on methods and signals.

1292

"""

1293

xmlstring = dbus.service.Object.Introspect(self, object_path,

1294

connection)

1295

try:

1296

document = xml.dom.minidom.parseString(xmlstring)

1297

1298

for if_tag in document.getElementsByTagName("interface"):

1299

# Add annotation tags

1300

for typ in ("method", "signal"):

1301

for tag in if_tag.getElementsByTagName(typ):

1302

annots = dict()

1303

for name, prop in (self.

1304

_get_all_dbus_things(typ)):

1305

if (name == tag.getAttribute("name")

1306

and prop._dbus_interface

1307

== if_tag.getAttribute("name")):

1308

annots.update(getattr(

1309

prop, "_dbus_annotations", {}))

1310

for name, value in annots.items():

1311

ann_tag = document.createElement(

1312

"annotation")

1313

ann_tag.setAttribute("name", name)

1314

ann_tag.setAttribute("value", value)

1315

tag.appendChild(ann_tag)

1316

# Add interface annotation tags

1317

for annotation, value in dict(

1318

itertools.chain.from_iterable(

1319

annotations().items()

1320

for name, annotations

1321

in self._get_all_dbus_things("interface")

1322

if name == if_tag.getAttribute("name")

1323

)).items():

1324

ann_tag = document.createElement("annotation")

1325

ann_tag.setAttribute("name", annotation)

1326

ann_tag.setAttribute("value", value)

1327

if_tag.appendChild(ann_tag)

1328

# Fix argument name for the Introspect method itself

1329

if (if_tag.getAttribute("name")

1330

== dbus.INTROSPECTABLE_IFACE):

1331

for cn in if_tag.getElementsByTagName("method"):

1332

if cn.getAttribute("name") == "Introspect":

1333

for arg in cn.getElementsByTagName("arg"):

1334

if (arg.getAttribute("direction")

1335

== "out"):

1336

arg.setAttribute("name",

1337

"xml_data")

1338

xmlstring = document.toxml("utf-8")

1339

document.unlink()

1340

except (AttributeError, xml.dom.DOMException,

1341

xml.parsers.expat.ExpatError) as error:

1342

logger.error("Failed to override Introspection method",

1343

exc_info=error)

1344

return xmlstring

1345

1346

1347

class DBusObjectWithProperties(DBusObjectWithAnnotations):

1348

"""A D-Bus object with properties.

1349

1350

Classes inheriting from this can use the dbus_service_property

1351

decorator to expose methods as D-Bus properties. It exposes the

1352

standard Get(), Set(), and GetAll() methods on the D-Bus.

1353

"""

1354

887

1355

888

def _get_dbus_property(self, interface_name, property_name):

1356

889

"""Returns a bound method if one exists which is a D-Bus

1357

890

property with the specified name and interface.

1362

895

if (value._dbus_name == property_name

1363

896

and value._dbus_interface == interface_name):

1364

897

return value.__get__(self)

1365

898

1366

899

# No such property

1367

900

raise DBusPropertyNotFound("{}:{}.{}".format(

1368

901

self.dbus_object_path, interface_name, property_name))

1369

1370

@classmethod

1371

def _get_all_interface_names(cls):

1372

"""Get a sequence of all interfaces supported by an object"""

1373

return (name for name in set(getattr(getattr(x, attr),

1374

"_dbus_interface", None)

1375

for x in (inspect.getmro(cls))

1376

for attr in dir(x))

1377

if name is not None)

1378

902

1379

903

@dbus.service.method(dbus.PROPERTIES_IFACE,

1380

904

in_signature="ss",

1381

905

out_signature="v")

1389

913

if not hasattr(value, "variant_level"):

1390

914

return value

1391

915

return type(value)(value, variant_level=value.variant_level+1)

1392

916

1393

917

@dbus.service.method(dbus.PROPERTIES_IFACE, in_signature="ssv")

1394

918

def Set(self, interface_name, property_name, value):

1395

919

"""Standard D-Bus property Set() method, see D-Bus standard.

1407

931

value = dbus.ByteArray(b''.join(chr(byte)

1408

932

for byte in value))

1409

933

prop(value)

1410

934

1411

935

@dbus.service.method(dbus.PROPERTIES_IFACE,

1412

936

in_signature="s",

1413

937

out_signature="a{sv}")

1414

938

def GetAll(self, interface_name):

1415

939

"""Standard D-Bus property GetAll() method, see D-Bus

1416

940

standard.

1417

941

1418

942

Note: Will not include properties with access="write".

1419

943

"""

1420

944

properties = {}

1431

955

properties[name] = value

1432

956

continue

1433

957

properties[name] = type(value)(

1434

value, variant_level=value.variant_level + 1)

958

value, variant_level = value.variant_level + 1)

1435

959

return dbus.Dictionary(properties, signature="sv")

1436

960

1437

961

@dbus.service.signal(dbus.PROPERTIES_IFACE, signature="sa{sv}as")

1438

962

def PropertiesChanged(self, interface_name, changed_properties,

1439

963

invalidated_properties):

1441

965

standard.

1442

966

"""

1443

967

pass

1444

968

1445

969

@dbus.service.method(dbus.INTROSPECTABLE_IFACE,

1446

970

out_signature="s",

1447

971

path_keyword='object_path',

1448

972

connection_keyword='connection')

1449

973

def Introspect(self, object_path, connection):

1450

974

"""Overloading of standard D-Bus method.

1451

975

1452

976

Inserts property tags and interface annotation tags.

1453

977

"""

1454

xmlstring = DBusObjectWithAnnotations.Introspect(self,

1455

object_path,

1456

connection)

978

xmlstring = dbus.service.Object.Introspect(self, object_path,

979

connection)

1457

980

try:

1458

981

document = xml.dom.minidom.parseString(xmlstring)

1459

982

1460

983

def make_tag(document, name, prop):

1461

984

e = document.createElement("property")

1462

985

e.setAttribute("name", name)

1463

986

e.setAttribute("type", prop._dbus_signature)

1464

987

e.setAttribute("access", prop._dbus_access)

1465

988

return e

1466

989

1467

990

for if_tag in document.getElementsByTagName("interface"):

1468

991

# Add property tags

1469

992

for tag in (make_tag(document, name, prop)

1472

995

if prop._dbus_interface

1473

996

== if_tag.getAttribute("name")):

1474

997

if_tag.appendChild(tag)

1475

# Add annotation tags for properties

1476

for tag in if_tag.getElementsByTagName("property"):

1477

annots = dict()

1478

for name, prop in self._get_all_dbus_things(

1479

"property"):

1480

if (name == tag.getAttribute("name")

1481

and prop._dbus_interface

1482

== if_tag.getAttribute("name")):

1483

annots.update(getattr(

1484

prop, "_dbus_annotations", {}))

1485

for name, value in annots.items():

1486

ann_tag = document.createElement(

1487

"annotation")

1488

ann_tag.setAttribute("name", name)

1489

ann_tag.setAttribute("value", value)

1490

tag.appendChild(ann_tag)

998

# Add annotation tags

999

for typ in ("method", "signal", "property"):

1000

for tag in if_tag.getElementsByTagName(typ):

1001

annots = dict()

1002

for name, prop in (self.

1003

_get_all_dbus_things(typ)):

1004

if (name == tag.getAttribute("name")

1005

and prop._dbus_interface

1006

== if_tag.getAttribute("name")):

1007

annots.update(getattr(

1008

prop, "_dbus_annotations", {}))

1009

for name, value in annots.items():

1010

ann_tag = document.createElement(

1011

"annotation")

1012

ann_tag.setAttribute("name", name)

1013

ann_tag.setAttribute("value", value)

1014

tag.appendChild(ann_tag)

1015

# Add interface annotation tags

1016

for annotation, value in dict(

1017

itertools.chain.from_iterable(

1018

annotations().items()

1019

for name, annotations

1020

in self._get_all_dbus_things("interface")

1021

if name == if_tag.getAttribute("name")

1022

)).items():

1023

ann_tag = document.createElement("annotation")

1024

ann_tag.setAttribute("name", annotation)

1025

ann_tag.setAttribute("value", value)

1026

if_tag.appendChild(ann_tag)

1491

1027

# Add the names to the return values for the

1492

1028

# "org.freedesktop.DBus.Properties" methods

1493

1029

if (if_tag.getAttribute("name")

1512

1048

return xmlstring

1513

1049

1514

1050

1515

try:

1516

dbus.OBJECT_MANAGER_IFACE

1517

except AttributeError:

1518

dbus.OBJECT_MANAGER_IFACE = "org.freedesktop.DBus.ObjectManager"

1519

1520

1521

class DBusObjectWithObjectManager(DBusObjectWithAnnotations):

1522

"""A D-Bus object with an ObjectManager.

1523

1524

Classes inheriting from this exposes the standard

1525

GetManagedObjects call and the InterfacesAdded and

1526

InterfacesRemoved signals on the standard

1527

"org.freedesktop.DBus.ObjectManager" interface.

1528

1529

Note: No signals are sent automatically; they must be sent

1530

manually.

1531

"""

1532

@dbus.service.method(dbus.OBJECT_MANAGER_IFACE,

1533

out_signature="a{oa{sa{sv}}}")

1534

def GetManagedObjects(self):

1535

"""This function must be overridden"""

1536

raise NotImplementedError()

1537

1538

@dbus.service.signal(dbus.OBJECT_MANAGER_IFACE,

1539

signature="oa{sa{sv}}")

1540

def InterfacesAdded(self, object_path, interfaces_and_properties):

1541

pass

1542

1543

@dbus.service.signal(dbus.OBJECT_MANAGER_IFACE, signature="oas")

1544

def InterfacesRemoved(self, object_path, interfaces):

1545

pass

1546

1547

@dbus.service.method(dbus.INTROSPECTABLE_IFACE,

1548

out_signature="s",

1549

path_keyword='object_path',

1550

connection_keyword='connection')

1551

def Introspect(self, object_path, connection):

1552

"""Overloading of standard D-Bus method.

1553

1554

Override return argument name of GetManagedObjects to be

1555

"objpath_interfaces_and_properties"

1556

"""

1557

xmlstring = DBusObjectWithAnnotations.Introspect(self,

1558

object_path,

1559

connection)

1560

try:

1561

document = xml.dom.minidom.parseString(xmlstring)

1562

1563

for if_tag in document.getElementsByTagName("interface"):

1564

# Fix argument name for the GetManagedObjects method

1565

if (if_tag.getAttribute("name")

1566

== dbus.OBJECT_MANAGER_IFACE):

1567

for cn in if_tag.getElementsByTagName("method"):

1568

if (cn.getAttribute("name")

1569

== "GetManagedObjects"):

1570

for arg in cn.getElementsByTagName("arg"):

1571

if (arg.getAttribute("direction")

1572

== "out"):

1573

arg.setAttribute(

1574

"name",

1575

"objpath_interfaces"

1576

"_and_properties")

1577

xmlstring = document.toxml("utf-8")

1578

document.unlink()

1579

except (AttributeError, xml.dom.DOMException,

1580

xml.parsers.expat.ExpatError) as error:

1581

logger.error("Failed to override Introspection method",

1582

exc_info=error)

1583

return xmlstring

1584

1585

1586

1051

def datetime_to_dbus(dt, variant_level=0):

1587

1052

"""Convert a UTC datetime.datetime() to a D-Bus type."""

1588

1053

if dt is None:

1589

return dbus.String("", variant_level=variant_level)

1054

return dbus.String("", variant_level = variant_level)

1590

1055

return dbus.String(dt.isoformat(), variant_level=variant_level)

1591

1056

1592

1057

1595

1060

dbus.service.Object, it will add alternate D-Bus attributes with

1596

1061

interface names according to the "alt_interface_names" mapping.

1597

1062

Usage:

1598

1063

1599

1064

@alternate_dbus_interfaces({"org.example.Interface":

1600

1065

"net.example.AlternateInterface"})

1601

1066

class SampleDBusObject(dbus.service.Object):

1602

1067

@dbus.service.method("org.example.Interface")

1603

1068

def SampleDBusMethod():

1604

1069

pass

1605

1070

1606

1071

The above "SampleDBusMethod" on "SampleDBusObject" will be

1607

1072

reachable via two interfaces: "org.example.Interface" and

1608

1073

"net.example.AlternateInterface", the latter of which will have

1609

1074

its D-Bus annotation "org.freedesktop.DBus.Deprecated" set to

1610

1075

"true", unless "deprecate" is passed with a False value.

1611

1076

1612

1077

This works for methods and signals, and also for D-Bus properties

1613

1078

(from DBusObjectWithProperties) and interfaces (from the

1614

1079

dbus_interface_annotations decorator).

1615

1080

"""

1616

1081

1617

1082

def wrapper(cls):

1618

1083

for orig_interface_name, alt_interface_name in (

1619

1084

alt_interface_names.items()):

1634

1099

interface_names.add(alt_interface)

1635

1100

# Is this a D-Bus signal?

1636

1101

if getattr(attribute, "_dbus_is_signal", False):

1637

# Extract the original non-method undecorated

1638

# function by black magic

1639

1102

if sys.version_info.major == 2:

1103

# Extract the original non-method undecorated

1104

# function by black magic

1640

1105

nonmethod_func = (dict(

1641

1106

zip(attribute.func_code.co_freevars,

1642

1107

attribute.__closure__))

1643

1108

["func"].cell_contents)

1644

1109

else:

1645

nonmethod_func = (dict(

1646

zip(attribute.__code__.co_freevars,

1647

attribute.__closure__))

1648

["func"].cell_contents)

1110

nonmethod_func = attribute

1649

1111

# Create a new, but exactly alike, function

1650

1112

# object, and decorate it to be a new D-Bus signal

1651

1113

# with the alternate D-Bus interface name

1652

new_function = copy_function(nonmethod_func)

1114

if sys.version_info.major == 2:

1115

new_function = types.FunctionType(

1116

nonmethod_func.func_code,

1117

nonmethod_func.func_globals,

1118

nonmethod_func.func_name,

1119

nonmethod_func.func_defaults,

1120

nonmethod_func.func_closure)

1121

else:

1122

new_function = types.FunctionType(

1123

nonmethod_func.__code__,

1124

nonmethod_func.__globals__,

1125

nonmethod_func.__name__,

1126

nonmethod_func.__defaults__,

1127

nonmethod_func.__closure__)

1653

1128

new_function = (dbus.service.signal(

1654

1129

alt_interface,

1655

1130

attribute._dbus_signature)(new_function))

1659

1134

attribute._dbus_annotations)

1660

1135

except AttributeError:

1661

1136

pass

1662

1663

1137

# Define a creator of a function to call both the

1664

1138

# original and alternate functions, so both the

1665

1139

# original and alternate signals gets sent when

1668

1142

"""This function is a scope container to pass

1669

1143

func1 and func2 to the "call_both" function

1670

1144

outside of its arguments"""

1671

1672

@functools.wraps(func2)

1145

1673

1146

def call_both(*args, **kwargs):

1674

1147

"""This function will emit two D-Bus

1675

1148

signals by calling func1 and func2"""

1676

1149

func1(*args, **kwargs)

1677

1150

func2(*args, **kwargs)

1678

# Make wrapper function look like a D-Bus

1679

# signal

1680

for name, attr in inspect.getmembers(func2):

1681

if name.startswith("_dbus_"):

1682

setattr(call_both, name, attr)

1683

1151

1684

1152

return call_both

1685

1153

# Create the "call_both" function and add it to

1686

1154

# the class

1696

1164

alt_interface,

1697

1165

attribute._dbus_in_signature,

1698

1166

attribute._dbus_out_signature)

1699

(copy_function(attribute)))

1167

(types.FunctionType(attribute.func_code,

1168

attribute.func_globals,

1169

attribute.func_name,

1170

attribute.func_defaults,

1171

attribute.func_closure)))

1700

1172

# Copy annotations, if any

1701

1173

try:

1702

1174

attr[attrname]._dbus_annotations = dict(

1714

1186

attribute._dbus_access,

1715

1187

attribute._dbus_get_args_options

1716

1188

["byte_arrays"])

1717

(copy_function(attribute)))

1189

(types.FunctionType(

1190

attribute.func_code,

1191

attribute.func_globals,

1192

attribute.func_name,

1193

attribute.func_defaults,

1194

attribute.func_closure)))

1718

1195

# Copy annotations, if any

1719

1196

try:

1720

1197

attr[attrname]._dbus_annotations = dict(

1729

1206

# to the class.

1730

1207

attr[attrname] = (

1731

1208

dbus_interface_annotations(alt_interface)

1732

(copy_function(attribute)))

1209

(types.FunctionType(attribute.func_code,

1210

attribute.func_globals,

1211

attribute.func_name,

1212

attribute.func_defaults,

1213

attribute.func_closure)))

1733

1214

if deprecate:

1734

1215

# Deprecate all alternate interfaces

1735

iname = "_AlternateDBusNames_interface_annotation{}"

1216

iname="_AlternateDBusNames_interface_annotation{}"

1736

1217

for interface_name in interface_names:

1737

1218

1738

1219

@dbus_interface_annotations(interface_name)

1739

1220

def func(self):

1740

return {"org.freedesktop.DBus.Deprecated":

1741

"true"}

1221

return { "org.freedesktop.DBus.Deprecated":

1222

"true" }

1742

1223

# Find an unused name

1743

1224

for aname in (iname.format(i)

1744

1225

for i in itertools.count()):

1748

1229

if interface_names:

1749

1230

# Replace the class with a new subclass of it with

1750

1231

# methods, signals, etc. as created above.

1751

if sys.version_info.major == 2:

1752

cls = type(b"{}Alternate".format(cls.__name__),

1753

(cls, ), attr)

1754

else:

1755

cls = type("{}Alternate".format(cls.__name__),

1756

(cls, ), attr)

1232

cls = type(b"{}Alternate".format(cls.__name__),

1233

(cls, ), attr)

1757

1234

return cls

1758

1235

1759

1236

return wrapper

1760

1237

1761

1238

1763

1240

"se.bsnet.fukt.Mandos"})

1764

1241

class ClientDBus(Client, DBusObjectWithProperties):

1765

1242

"""A Client class using D-Bus

1766

1243

1767

1244

Attributes:

1768

1245

dbus_object_path: dbus.ObjectPath

1769

1246

bus: dbus.SystemBus()

1770

1247

"""

1771

1248

1772

1249

runtime_expansions = (Client.runtime_expansions

1773

1250

+ ("dbus_object_path", ))

1774

1251

1775

1252

_interface = "se.recompile.Mandos.Client"

1776

1253

1777

1254

# dbus.service.Object doesn't use super(), so we can't either.

1778

1779

def __init__(self, bus=None, *args, **kwargs):

1255

1256

def __init__(self, bus = None, *args, **kwargs):

1780

1257

self.bus = bus

1781

1258

Client.__init__(self, *args, **kwargs)

1782

1259

# Only now, when this client is initialized, can it show up on

1788

1265

"/clients/" + client_object_name)

1789

1266

DBusObjectWithProperties.__init__(self, self.bus,

1790

1267

self.dbus_object_path)

1791

1268

1792

1269

def notifychangeproperty(transform_func, dbus_name,

1793

1270

type_func=lambda x: x,

1794

1271

variant_level=1,

1796

1273

_interface=_interface):

1797

1274

""" Modify a variable so that it's a property which announces

1798

1275

its changes to DBus.

1799

1276

1800

1277

transform_fun: Function that takes a value and a variant_level

1801

1278

and transforms it to a D-Bus type.

1802

1279

dbus_name: D-Bus name of the variable

1805

1282

variant_level: D-Bus variant level. Default: 1

1806

1283

"""

1807

1284

attrname = "_{}".format(dbus_name)

1808

1285

1809

1286

def setter(self, value):

1810

1287

if hasattr(self, "dbus_object_path"):

1811

1288

if (not hasattr(self, attrname) or

1818

1295

else:

1819

1296

dbus_value = transform_func(

1820

1297

type_func(value),

1821

variant_level=variant_level)

1298

variant_level = variant_level)

1822

1299

self.PropertyChanged(dbus.String(dbus_name),

1823

1300

dbus_value)

1824

1301

self.PropertiesChanged(

1825

1302

_interface,

1826

dbus.Dictionary({dbus.String(dbus_name):

1827

dbus_value}),

1303

dbus.Dictionary({ dbus.String(dbus_name):

1304

dbus_value }),

1828

1305

dbus.Array())

1829

1306

setattr(self, attrname, value)

1830

1307

1831

1308

return property(lambda self: getattr(self, attrname), setter)

1832

1309

1833

1310

expires = notifychangeproperty(datetime_to_dbus, "Expires")

1834

1311

approvals_pending = notifychangeproperty(dbus.Boolean,

1835

1312

"ApprovalPending",

1836

type_func=bool)

1313

type_func = bool)

1837

1314

enabled = notifychangeproperty(dbus.Boolean, "Enabled")

1838

1315

last_enabled = notifychangeproperty(datetime_to_dbus,

1839

1316

"LastEnabled")

1840

1317

checker = notifychangeproperty(

1841

1318

dbus.Boolean, "CheckerRunning",

1842

type_func=lambda checker: checker is not None)

1319

type_func = lambda checker: checker is not None)

1843

1320

last_checked_ok = notifychangeproperty(datetime_to_dbus,

1844

1321

"LastCheckedOK")

1845

1322

last_checker_status = notifychangeproperty(dbus.Int16,

1850

1327

"ApprovedByDefault")

1851

1328

approval_delay = notifychangeproperty(

1852

1329

dbus.UInt64, "ApprovalDelay",

1853

type_func=lambda td: td.total_seconds() * 1000)

1330

type_func = lambda td: td.total_seconds() * 1000)

1854

1331

approval_duration = notifychangeproperty(

1855

1332

dbus.UInt64, "ApprovalDuration",

1856

type_func=lambda td: td.total_seconds() * 1000)

1333

type_func = lambda td: td.total_seconds() * 1000)

1857

1334

host = notifychangeproperty(dbus.String, "Host")

1858

1335

timeout = notifychangeproperty(

1859

1336

dbus.UInt64, "Timeout",

1860

type_func=lambda td: td.total_seconds() * 1000)

1337

type_func = lambda td: td.total_seconds() * 1000)

1861

1338

extended_timeout = notifychangeproperty(

1862

1339

dbus.UInt64, "ExtendedTimeout",

1863

type_func=lambda td: td.total_seconds() * 1000)

1340

type_func = lambda td: td.total_seconds() * 1000)

1864

1341

interval = notifychangeproperty(

1865

1342

dbus.UInt64, "Interval",

1866

type_func=lambda td: td.total_seconds() * 1000)

1343

type_func = lambda td: td.total_seconds() * 1000)

1867

1344

checker_command = notifychangeproperty(dbus.String, "Checker")

1868

1345

secret = notifychangeproperty(dbus.ByteArray, "Secret",

1869

1346

invalidate_only=True)

1870

1347

1871

1348

del notifychangeproperty

1872

1349

1873

1350

def __del__(self, *args, **kwargs):

1874

1351

try:

1875

1352

self.remove_from_connection()

1878

1355

if hasattr(DBusObjectWithProperties, "__del__"):

1879

1356

DBusObjectWithProperties.__del__(self, *args, **kwargs)

1880

1357

Client.__del__(self, *args, **kwargs)

1881

1358

1882

1359

def checker_callback(self, source, condition,

1883

1360

connection, command, *args, **kwargs):

1884

1361

ret = Client.checker_callback(self, source, condition,

1888

1365

if exitstatus >= 0:

1889

1366

# Emit D-Bus signal

1890

1367

self.CheckerCompleted(dbus.Int16(exitstatus),

1891

# This is specific to GNU libC

1892

dbus.Int64(exitstatus << 8),

1368

dbus.Int64(0),

1893

1369

dbus.String(command))

1894

1370

else:

1895

1371

# Emit D-Bus signal

1896

1372

self.CheckerCompleted(dbus.Int16(-1),

1897

1373

dbus.Int64(

1898

# This is specific to GNU libC

1899

(exitstatus << 8)

1900

| self.last_checker_signal),

1374

self.last_checker_signal),

1901

1375

dbus.String(command))

1902

1376

return ret

1903

1377

1904

1378

def start_checker(self, *args, **kwargs):

1905

1379

old_checker_pid = getattr(self.checker, "pid", None)

1906

1380

r = Client.start_checker(self, *args, **kwargs)

1910

1384

# Emit D-Bus signal

1911

1385

self.CheckerStarted(self.current_checker_command)

1912

1386

return r

1913

1387

1914

1388

def _reset_approved(self):

1915

1389

self.approved = None

1916

1390

return False

1917

1391

1918

1392

def approve(self, value=True):

1919

1393

self.approved = value

1920

GLib.timeout_add(int(self.approval_duration.total_seconds()

1921

* 1000), self._reset_approved)

1394

gobject.timeout_add(int(self.approval_duration.total_seconds()

1395

* 1000), self._reset_approved)

1922

1396

self.send_changedstate()

1923

1924

# D-Bus methods, signals & properties

1925

1926

# Interfaces

1927

1928

# Signals

1929

1397

1398

## D-Bus methods, signals & properties

1399

1400

## Interfaces

1401

1402

## Signals

1403

1930

1404

# CheckerCompleted - signal

1931

1405

@dbus.service.signal(_interface, signature="nxs")

1932

1406

def CheckerCompleted(self, exitcode, waitstatus, command):

1933

1407

"D-Bus signal"

1934

1408

pass

1935

1409

1936

1410

# CheckerStarted - signal

1937

1411

@dbus.service.signal(_interface, signature="s")

1938

1412

def CheckerStarted(self, command):

1939

1413

"D-Bus signal"

1940

1414

pass

1941

1415

1942

1416

# PropertyChanged - signal

1943

1417

@dbus_annotations({"org.freedesktop.DBus.Deprecated": "true"})

1944

1418

@dbus.service.signal(_interface, signature="sv")

1945

1419

def PropertyChanged(self, property, value):

1946

1420

"D-Bus signal"

1947

1421

pass

1948

1422

1949

1423

# GotSecret - signal

1950

1424

@dbus.service.signal(_interface)

1951

1425

def GotSecret(self):

1954

1428

server to mandos-client

1955

1429

"""

1956

1430

pass

1957

1431

1958

1432

# Rejected - signal

1959

1433

@dbus.service.signal(_interface, signature="s")

1960

1434

def Rejected(self, reason):

1961

1435

"D-Bus signal"

1962

1436

pass

1963

1437

1964

1438

# NeedApproval - signal

1965

1439

@dbus.service.signal(_interface, signature="tb")

1966

1440

def NeedApproval(self, timeout, default):

1967

1441

"D-Bus signal"

1968

1442

return self.need_approval()

1969

1970

# Methods

1971

1443

1444

## Methods

1445

1972

1446

# Approve - method

1973

1447

@dbus.service.method(_interface, in_signature="b")

1974

1448

def Approve(self, value):

1975

1449

self.approve(value)

1976

1450

1977

1451

# CheckedOK - method

1978

1452

@dbus.service.method(_interface)

1979

1453

def CheckedOK(self):

1980

1454

self.checked_ok()

1981

1455

1982

1456

# Enable - method

1983

@dbus_annotations({"org.freedesktop.DBus.Deprecated": "true"})

1984

1457

@dbus.service.method(_interface)

1985

1458

def Enable(self):

1986

1459

"D-Bus method"

1987

1460

self.enable()

1988

1461

1989

1462

# StartChecker - method

1990

@dbus_annotations({"org.freedesktop.DBus.Deprecated": "true"})

1991

1463

@dbus.service.method(_interface)

1992

1464

def StartChecker(self):

1993

1465

"D-Bus method"

1994

1466

self.start_checker()

1995

1467

1996

1468

# Disable - method

1997

@dbus_annotations({"org.freedesktop.DBus.Deprecated": "true"})

1998

1469

@dbus.service.method(_interface)

1999

1470

def Disable(self):

2000

1471

"D-Bus method"

2001

1472

self.disable()

2002

1473

2003

1474

# StopChecker - method

2004

@dbus_annotations({"org.freedesktop.DBus.Deprecated": "true"})

2005

1475

@dbus.service.method(_interface)

2006

1476

def StopChecker(self):

2007

1477

self.stop_checker()

2008

2009

# Properties

2010

1478

1479

## Properties

1480

2011

1481

# ApprovalPending - property

2012

1482

@dbus_service_property(_interface, signature="b", access="read")

2013

1483

def ApprovalPending_dbus_property(self):

2014

1484

return dbus.Boolean(bool(self.approvals_pending))

2015

1485

2016

1486

# ApprovedByDefault - property

2017

1487

@dbus_service_property(_interface,

2018

1488

signature="b",

2021

1491

if value is None: # get

2022

1492

return dbus.Boolean(self.approved_by_default)

2023

1493

self.approved_by_default = bool(value)

2024

1494

2025

1495

# ApprovalDelay - property

2026

1496

@dbus_service_property(_interface,

2027

1497

signature="t",

2031

1501

return dbus.UInt64(self.approval_delay.total_seconds()

2032

1502

* 1000)

2033

1503

self.approval_delay = datetime.timedelta(0, 0, 0, value)

2034

1504

2035

1505

# ApprovalDuration - property

2036

1506

@dbus_service_property(_interface,

2037

1507

signature="t",

2041

1511

return dbus.UInt64(self.approval_duration.total_seconds()

2042

1512

* 1000)

2043

1513

self.approval_duration = datetime.timedelta(0, 0, 0, value)

2044

1514

2045

1515

# Name - property

2046

@dbus_annotations(

2047

{"org.freedesktop.DBus.Property.EmitsChangedSignal": "const"})

2048

1516

@dbus_service_property(_interface, signature="s", access="read")

2049

1517

def Name_dbus_property(self):

2050

1518

return dbus.String(self.name)

2051

2052

# KeyID - property

2053

@dbus_annotations(

2054

{"org.freedesktop.DBus.Property.EmitsChangedSignal": "const"})

2055

@dbus_service_property(_interface, signature="s", access="read")

2056

def KeyID_dbus_property(self):

2057

return dbus.String(self.key_id)

2058

1519

2059

1520

# Fingerprint - property

2060

@dbus_annotations(

2061

{"org.freedesktop.DBus.Property.EmitsChangedSignal": "const"})

2062

1521

@dbus_service_property(_interface, signature="s", access="read")

2063

1522

def Fingerprint_dbus_property(self):

2064

1523

return dbus.String(self.fingerprint)

2065

1524

2066

1525

# Host - property

2067

1526

@dbus_service_property(_interface,

2068

1527

signature="s",

2071

1530

if value is None: # get

2072

1531

return dbus.String(self.host)

2073

1532

self.host = str(value)

2074

1533

2075

1534

# Created - property

2076

@dbus_annotations(

2077

{"org.freedesktop.DBus.Property.EmitsChangedSignal": "const"})

2078

1535

@dbus_service_property(_interface, signature="s", access="read")

2079

1536

def Created_dbus_property(self):

2080

1537

return datetime_to_dbus(self.created)

2081

1538

2082

1539

# LastEnabled - property

2083

1540

@dbus_service_property(_interface, signature="s", access="read")

2084

1541

def LastEnabled_dbus_property(self):

2085

1542

return datetime_to_dbus(self.last_enabled)

2086

1543

2087

1544

# Enabled - property

2088

1545

@dbus_service_property(_interface,

2089

1546

signature="b",

2095

1552

self.enable()

2096

1553

else:

2097

1554

self.disable()

2098

1555

2099

1556

# LastCheckedOK - property

2100

1557

@dbus_service_property(_interface,

2101

1558

signature="s",

2105

1562

self.checked_ok()

2106

1563

return

2107

1564

return datetime_to_dbus(self.last_checked_ok)

2108

1565

2109

1566

# LastCheckerStatus - property

2110

1567

@dbus_service_property(_interface, signature="n", access="read")

2111

1568

def LastCheckerStatus_dbus_property(self):

2112

1569

return dbus.Int16(self.last_checker_status)

2113

1570

2114

1571

# Expires - property

2115

1572

@dbus_service_property(_interface, signature="s", access="read")

2116

1573

def Expires_dbus_property(self):

2117

1574

return datetime_to_dbus(self.expires)

2118

1575

2119

1576

# LastApprovalRequest - property

2120

1577

@dbus_service_property(_interface, signature="s", access="read")

2121

1578

def LastApprovalRequest_dbus_property(self):

2122

1579

return datetime_to_dbus(self.last_approval_request)

2123

1580

2124

1581

# Timeout - property

2125

1582

@dbus_service_property(_interface,

2126

1583

signature="t",

2141

1598

if (getattr(self, "disable_initiator_tag", None)

2142

1599

is None):

2143

1600

return

2144

GLib.source_remove(self.disable_initiator_tag)

2145

self.disable_initiator_tag = GLib.timeout_add(

1601

gobject.source_remove(self.disable_initiator_tag)

1602

self.disable_initiator_tag = gobject.timeout_add(

2146

1603

int((self.expires - now).total_seconds() * 1000),

2147

1604

self.disable)

2148

1605

2149

1606

# ExtendedTimeout - property

2150

1607

@dbus_service_property(_interface,

2151

1608

signature="t",

2155

1612

return dbus.UInt64(self.extended_timeout.total_seconds()

2156

1613

* 1000)

2157

1614

self.extended_timeout = datetime.timedelta(0, 0, 0, value)

2158

1615

2159

1616

# Interval - property

2160

1617

@dbus_service_property(_interface,

2161

1618

signature="t",

2168

1625

return

2169

1626

if self.enabled:

2170

1627

# Reschedule checker run

2171

GLib.source_remove(self.checker_initiator_tag)

2172

self.checker_initiator_tag = GLib.timeout_add(

1628

gobject.source_remove(self.checker_initiator_tag)

1629

self.checker_initiator_tag = gobject.timeout_add(

2173

1630

value, self.start_checker)

2174

self.start_checker() # Start one now, too

2175

1631

self.start_checker() # Start one now, too

1632

2176

1633

# Checker - property

2177

1634

@dbus_service_property(_interface,

2178

1635

signature="s",

2181

1638

if value is None: # get

2182

1639

return dbus.String(self.checker_command)

2183

1640

self.checker_command = str(value)

2184

1641

2185

1642

# CheckerRunning - property

2186

1643

@dbus_service_property(_interface,

2187

1644

signature="b",

2193

1650

self.start_checker()

2194

1651

else:

2195

1652

self.stop_checker()

2196

1653

2197

1654

# ObjectPath - property

2198

@dbus_annotations(

2199

{"org.freedesktop.DBus.Property.EmitsChangedSignal": "const",

2200

"org.freedesktop.DBus.Deprecated": "true"})

2201

1655

@dbus_service_property(_interface, signature="o", access="read")

2202

1656

def ObjectPath_dbus_property(self):

2203

return self.dbus_object_path # is already a dbus.ObjectPath

2204

1657

return self.dbus_object_path # is already a dbus.ObjectPath

1658

2205

1659

# Secret = property

2206

@dbus_annotations(

2207

{"org.freedesktop.DBus.Property.EmitsChangedSignal":

2208

"invalidates"})

2209

1660

@dbus_service_property(_interface,

2210

1661

signature="ay",

2211

1662

access="write",

2212

1663

byte_arrays=True)

2213

1664

def Secret_dbus_property(self, value):

2214

1665

self.secret = bytes(value)

2215

1666

2216

1667

del _interface

2217

1668

2218

1669

2219

class ProxyClient:

2220

def __init__(self, child_pipe, key_id, fpr, address):

1670

class ProxyClient(object):

1671

def __init__(self, child_pipe, fpr, address):

2221

1672

self._pipe = child_pipe

2222

self._pipe.send(('init', key_id, fpr, address))

1673

self._pipe.send(('init', fpr, address))

2223

1674

if not self._pipe.recv():

2224

raise KeyError(key_id or fpr)

2225

1675

raise KeyError(fpr)

1676

2226

1677

def __getattribute__(self, name):

2227

1678

if name == '_pipe':

2228

1679

return super(ProxyClient, self).__getattribute__(name)

2231

1682

if data[0] == 'data':

2232

1683

return data[1]

2233

1684

if data[0] == 'function':

2234

1685

2235

1686

def func(*args, **kwargs):

2236

1687

self._pipe.send(('funcall', name, args, kwargs))

2237

1688

return self._pipe.recv()[1]

2238

1689

2239

1690

return func

2240

1691

2241

1692

def __setattr__(self, name, value):

2242

1693

if name == '_pipe':

2243

1694

return super(ProxyClient, self).__setattr__(name, value)

2246

1697

2247

1698

class ClientHandler(socketserver.BaseRequestHandler, object):

2248

1699

"""A class to handle client connections.

2249

1700

2250

1701

Instantiated once for each connection to handle it.

2251

1702

Note: This will run in its own forked process."""

2252

1703

2253

1704

def handle(self):

2254

1705

with contextlib.closing(self.server.child_pipe) as child_pipe:

2255

1706

logger.info("TCP connection from: %s",

2256

1707

str(self.client_address))

2257

1708

logger.debug("Pipe FD: %d",

2258

1709

self.server.child_pipe.fileno())

2259

2260

session = gnutls.ClientSession(self.request)

2261

2262

# priority = ':'.join(("NONE", "+VERS-TLS1.1",

2263

# "+AES-256-CBC", "+SHA1",

2264

# "+COMP-NULL", "+CTYPE-OPENPGP",

2265

# "+DHE-DSS"))

1710

1711

session = gnutls.connection.ClientSession(

1712

self.request, gnutls.connection .X509Credentials())

1713

1714

# Note: gnutls.connection.X509Credentials is really a

1715

# generic GnuTLS certificate credentials object so long as

1716

# no X.509 keys are added to it. Therefore, we can use it

1717

# here despite using OpenPGP certificates.

1718

1719

#priority = ':'.join(("NONE", "+VERS-TLS1.1",

1720

# "+AES-256-CBC", "+SHA1",

1721

# "+COMP-NULL", "+CTYPE-OPENPGP",

1722

# "+DHE-DSS"))

2266

1723

# Use a fallback default, since this MUST be set.

2267

1724

priority = self.server.gnutls_priority

2268

1725

if priority is None:

2269

1726

priority = "NORMAL"

2270

gnutls.priority_set_direct(session._c_object,

2271

priority.encode("utf-8"),

2272

None)

2273

1727

gnutls.library.functions.gnutls_priority_set_direct(

1728

session._c_object, priority, None)

1729

2274

1730

# Start communication using the Mandos protocol

2275

1731

# Get protocol number

2276

1732

line = self.request.makefile().readline()

2281

1737

except (ValueError, IndexError, RuntimeError) as error:

2282

1738

logger.error("Unknown protocol version: %s", error)

2283

1739

return

2284

1740

2285

1741

# Start GnuTLS connection

2286

1742

try:

2287

1743

session.handshake()

2288

except gnutls.Error as error:

1744

except gnutls.errors.GNUTLSError as error:

2289

1745

logger.warning("Handshake failed: %s", error)

2290

1746

# Do not run session.bye() here: the session is not

2291

1747

# established. Just abandon the request.

2292

1748

return

2293

1749

logger.debug("Handshake succeeded")

2294

1750

2295

1751

approval_required = False

2296

1752

try:

2297

if gnutls.has_rawpk:

2298

fpr = b""

2299

try:

2300

key_id = self.key_id(

2301

self.peer_certificate(session))

2302

except (TypeError, gnutls.Error) as error:

2303

logger.warning("Bad certificate: %s", error)

2304

return

2305

logger.debug("Key ID: %s", key_id)

2306

2307

else:

2308

key_id = b""

2309

try:

2310

fpr = self.fingerprint(

2311

self.peer_certificate(session))

2312

except (TypeError, gnutls.Error) as error:

2313

logger.warning("Bad certificate: %s", error)

2314

return

2315

logger.debug("Fingerprint: %s", fpr)

2316

2317

try:

2318

client = ProxyClient(child_pipe, key_id, fpr,

1753

try:

1754

fpr = self.fingerprint(

1755

self.peer_certificate(session))

1756

except (TypeError,

1757

gnutls.errors.GNUTLSError) as error:

1758

logger.warning("Bad certificate: %s", error)

1759

return

1760

logger.debug("Fingerprint: %s", fpr)

1761

1762

try:

1763

client = ProxyClient(child_pipe, fpr,

2319

1764

self.client_address)

2320

1765

except KeyError:

2321

1766

return

2322

1767

2323

1768

if client.approval_delay:

2324

1769

delay = client.approval_delay

2325

1770

client.approvals_pending += 1

2326

1771

approval_required = True

2327

1772

2328

1773

while True:

2329

1774

if not client.enabled:

2330

1775

logger.info("Client %s is disabled",

2333

1778

# Emit D-Bus signal

2334

1779

client.Rejected("Disabled")

2335

1780

return

2336

1781

2337

1782

if client.approved or not client.approval_delay:

2338

# We are approved or approval is disabled

1783

#We are approved or approval is disabled

2339

1784

break

2340

1785

elif client.approved is None:

2341

1786

logger.info("Client %s needs approval",

2352

1797

# Emit D-Bus signal

2353

1798

client.Rejected("Denied")

2354

1799

return

2355

2356

# wait until timeout or approved

1800

1801

#wait until timeout or approved

2357

1802

time = datetime.datetime.now()

2358

1803

client.changedstate.acquire()

2359

1804

client.changedstate.wait(delay.total_seconds())

2372

1817

break

2373

1818

else:

2374

1819

delay -= time2 - time

2375

2376

try:

2377

session.send(client.secret)

2378

except gnutls.Error as error:

2379

logger.warning("gnutls send failed",

2380

exc_info=error)

2381

return

2382

1820

1821

sent_size = 0

1822

while sent_size < len(client.secret):

1823

try:

1824

sent = session.send(client.secret[sent_size:])

1825

except gnutls.errors.GNUTLSError as error:

1826

logger.warning("gnutls send failed",

1827

exc_info=error)

1828

return

1829

logger.debug("Sent: %d, remaining: %d", sent,

1830

len(client.secret) - (sent_size

1831

+ sent))

1832

sent_size += sent

1833

2383

1834

logger.info("Sending secret to %s", client.name)

2384

1835

# bump the timeout using extended_timeout

2385

1836

client.bump_timeout(client.extended_timeout)

2386

1837

if self.server.use_dbus:

2387

1838

# Emit D-Bus signal

2388

1839

client.GotSecret()

2389

1840

2390

1841

finally:

2391

1842

if approval_required:

2392

1843

client.approvals_pending -= 1

2393

1844

try:

2394

1845

session.bye()

2395

except gnutls.Error as error:

1846

except gnutls.errors.GNUTLSError as error:

2396

1847

logger.warning("GnuTLS bye failed",

2397

1848

exc_info=error)

2398

1849

2399

1850

@staticmethod

2400

1851

def peer_certificate(session):

2401

"Return the peer's certificate as a bytestring"

2402

try:

2403

cert_type = gnutls.certificate_type_get2(session._c_object,

2404

gnutls.CTYPE_PEERS)

2405

except AttributeError:

2406

cert_type = gnutls.certificate_type_get(session._c_object)

2407

if gnutls.has_rawpk:

2408

valid_cert_types = frozenset((gnutls.CRT_RAWPK,))

2409

else:

2410

valid_cert_types = frozenset((gnutls.CRT_OPENPGP,))

2411

# If not a valid certificate type...

2412

if cert_type not in valid_cert_types:

2413

logger.info("Cert type %r not in %r", cert_type,

2414

valid_cert_types)

2415

# ...return invalid data

2416

return b""

1852

"Return the peer's OpenPGP certificate as a bytestring"

1853

# If not an OpenPGP certificate...

1854

if (gnutls.library.functions.gnutls_certificate_type_get(

1855

session._c_object)

1856

!= gnutls.library.constants.GNUTLS_CRT_OPENPGP):

1857

# ...do the normal thing

1858

return session.peer_certificate

2417

1859

list_size = ctypes.c_uint(1)

2418

cert_list = (gnutls.certificate_get_peers

1860

cert_list = (gnutls.library.functions

1861

.gnutls_certificate_get_peers

2419

1862

(session._c_object, ctypes.byref(list_size)))

2420

1863

if not bool(cert_list) and list_size.value != 0:

2421

raise gnutls.Error("error getting peer certificate")

1864

raise gnutls.errors.GNUTLSError("error getting peer"

1865

" certificate")

2422

1866

if list_size.value == 0:

2423

1867

return None

2424

1868

cert = cert_list[0]

2425

1869

return ctypes.string_at(cert.data, cert.size)

2426

2427

@staticmethod

2428

def key_id(certificate):

2429

"Convert a certificate bytestring to a hexdigit key ID"

2430

# New GnuTLS "datum" with the public key

2431

datum = gnutls.datum_t(

2432

ctypes.cast(ctypes.c_char_p(certificate),

2433

ctypes.POINTER(ctypes.c_ubyte)),

2434

ctypes.c_uint(len(certificate)))

2435

# XXX all these need to be created in the gnutls "module"

2436

# New empty GnuTLS certificate

2437

pubkey = gnutls.pubkey_t()

2438

gnutls.pubkey_init(ctypes.byref(pubkey))

2439

# Import the raw public key into the certificate

2440

gnutls.pubkey_import(pubkey,

2441

ctypes.byref(datum),

2442

gnutls.X509_FMT_DER)

2443

# New buffer for the key ID

2444

buf = ctypes.create_string_buffer(32)

2445

buf_len = ctypes.c_size_t(len(buf))

2446

# Get the key ID from the raw public key into the buffer

2447

gnutls.pubkey_get_key_id(pubkey,

2448

gnutls.KEYID_USE_SHA256,

2449

ctypes.cast(ctypes.byref(buf),

2450

ctypes.POINTER(ctypes.c_ubyte)),

2451

ctypes.byref(buf_len))

2452

# Deinit the certificate

2453

gnutls.pubkey_deinit(pubkey)

2454

2455

# Convert the buffer to a Python bytestring

2456

key_id = ctypes.string_at(buf, buf_len.value)

2457

# Convert the bytestring to hexadecimal notation

2458

hex_key_id = binascii.hexlify(key_id).upper()

2459

return hex_key_id

2460

1870

2461

1871

@staticmethod

2462

1872

def fingerprint(openpgp):

2463

1873

"Convert an OpenPGP bytestring to a hexdigit fingerprint"

2464

1874

# New GnuTLS "datum" with the OpenPGP public key

2465

datum = gnutls.datum_t(

1875

datum = gnutls.library.types.gnutls_datum_t(

2466

1876

ctypes.cast(ctypes.c_char_p(openpgp),

2467

1877

ctypes.POINTER(ctypes.c_ubyte)),

2468

1878

ctypes.c_uint(len(openpgp)))

2469

1879

# New empty GnuTLS certificate

2470

crt = gnutls.openpgp_crt_t()

2471

gnutls.openpgp_crt_init(ctypes.byref(crt))

1880

crt = gnutls.library.types.gnutls_openpgp_crt_t()

1881

gnutls.library.functions.gnutls_openpgp_crt_init(

1882

ctypes.byref(crt))

2472

1883

# Import the OpenPGP public key into the certificate

2473

gnutls.openpgp_crt_import(crt, ctypes.byref(datum),

2474

gnutls.OPENPGP_FMT_RAW)

1884

gnutls.library.functions.gnutls_openpgp_crt_import(

1885

crt, ctypes.byref(datum),

1886

gnutls.library.constants.GNUTLS_OPENPGP_FMT_RAW)

2475

1887

# Verify the self signature in the key

2476

1888

crtverify = ctypes.c_uint()

2477

gnutls.openpgp_crt_verify_self(crt, 0,

2478

ctypes.byref(crtverify))

1889

gnutls.library.functions.gnutls_openpgp_crt_verify_self(

1890

crt, 0, ctypes.byref(crtverify))

2479

1891

if crtverify.value != 0:

2480

gnutls.openpgp_crt_deinit(crt)

2481

raise gnutls.CertificateSecurityError(code

2482

=crtverify.value)

1892

gnutls.library.functions.gnutls_openpgp_crt_deinit(crt)

1893

raise gnutls.errors.CertificateSecurityError(

1894

"Verify failed")

2483

1895

# New buffer for the fingerprint

2484

1896

buf = ctypes.create_string_buffer(20)

2485

1897

buf_len = ctypes.c_size_t()

2486

1898

# Get the fingerprint from the certificate into the buffer

2487

gnutls.openpgp_crt_get_fingerprint(crt, ctypes.byref(buf),

2488

ctypes.byref(buf_len))

1899

gnutls.library.functions.gnutls_openpgp_crt_get_fingerprint(

1900

crt, ctypes.byref(buf), ctypes.byref(buf_len))

2489

1901

# Deinit the certificate

2490

gnutls.openpgp_crt_deinit(crt)

1902

gnutls.library.functions.gnutls_openpgp_crt_deinit(crt)

2491

1903

# Convert the buffer to a Python bytestring

2492

1904

fpr = ctypes.string_at(buf, buf_len.value)

2493

1905

# Convert the bytestring to hexadecimal notation

2495

1907

return hex_fpr

2496

1908

2497

1909

2498

class MultiprocessingMixIn:

1910

class MultiprocessingMixIn(object):

2499

1911

"""Like socketserver.ThreadingMixIn, but with multiprocessing"""

2500

1912

2501

1913

def sub_process_main(self, request, address):

2502

1914

try:

2503

1915

self.finish_request(request, address)

2504

1916

except Exception:

2505

1917

self.handle_error(request, address)

2506

1918

self.close_request(request)

2507

1919

2508

1920

def process_request(self, request, address):

2509

1921

"""Start a new process to process the request."""

2510

proc = multiprocessing.Process(target=self.sub_process_main,

2511

args=(request, address))

1922

proc = multiprocessing.Process(target = self.sub_process_main,

1923

args = (request, address))

2512

1924

proc.start()

2513

1925

return proc

2514

1926

2515

1927

2516

class MultiprocessingMixInWithPipe(MultiprocessingMixIn):

1928

class MultiprocessingMixInWithPipe(MultiprocessingMixIn, object):

2517

1929

""" adds a pipe to the MixIn """

2518

1930

2519

1931

def process_request(self, request, client_address):

2520

1932

"""Overrides and wraps the original process_request().

2521

1933

2522

1934

This function creates a new pipe in self.pipe

2523

1935

"""

2524

1936

parent_pipe, self.child_pipe = multiprocessing.Pipe()

2525

1937

2526

1938

proc = MultiprocessingMixIn.process_request(self, request,

2527

1939

client_address)

2528

1940

self.child_pipe.close()

2529

1941

self.add_pipe(parent_pipe, proc)

2530

1942

2531

1943

def add_pipe(self, parent_pipe, proc):

2532

1944

"""Dummy function; override as necessary"""

2533

1945

raise NotImplementedError()

2534

1946

2535

1947

2536

1948

class IPv6_TCPServer(MultiprocessingMixInWithPipe,

2537

socketserver.TCPServer):

1949

socketserver.TCPServer, object):

2538

1950

"""IPv6-capable TCP server. Accepts 'None' as address and/or port

2539

1951

2540

1952

Attributes:

2541

1953

enabled: Boolean; whether this server is activated yet

2542

1954

interface: None or a network interface name (string)

2543

1955

use_ipv6: Boolean; to use IPv6 or not

2544

1956

"""

2545

1957

2546

1958

def __init__(self, server_address, RequestHandlerClass,

2547

1959

interface=None,

2548

1960

use_ipv6=True,

2558

1970

self.socketfd = socketfd

2559

1971

# Save the original socket.socket() function

2560

1972

self.socket_socket = socket.socket

2561

2562

1973

# To implement --socket, we monkey patch socket.socket.

2563

#

1974

#

2564

1975

# (When socketserver.TCPServer is a new-style class, we

2565

1976

# could make self.socket into a property instead of monkey

2566

1977

# patching socket.socket.)

2567

#

1978

#

2568

1979

# Create a one-time-only replacement for socket.socket()

2569

1980

@functools.wraps(socket.socket)

2570

1981

def socket_wrapper(*args, **kwargs):

2582

1993

# socket_wrapper(), if socketfd was set.

2583

1994

socketserver.TCPServer.__init__(self, server_address,

2584

1995

RequestHandlerClass)

2585

1996

2586

1997

def server_bind(self):

2587

1998

"""This overrides the normal server_bind() function

2588

1999

to bind to an interface if one was specified, and also NOT to

2589

2000

bind to an address or port if they were not specified."""

2590

global SO_BINDTODEVICE

2591

2001

if self.interface is not None:

2592

2002

if SO_BINDTODEVICE is None:

2593

# Fall back to a hard-coded value which seems to be

2594

# common enough.

2595

logger.warning("SO_BINDTODEVICE not found, trying 25")

2596

SO_BINDTODEVICE = 25

2597

try:

2598

self.socket.setsockopt(

2599

socket.SOL_SOCKET, SO_BINDTODEVICE,

2600

(self.interface + "\0").encode("utf-8"))

2601

except socket.error as error:

2602

if error.errno == errno.EPERM:

2603

logger.error("No permission to bind to"

2604

" interface %s", self.interface)

2605

elif error.errno == errno.ENOPROTOOPT:

2606

logger.error("SO_BINDTODEVICE not available;"

2607

" cannot bind to interface %s",

2608

self.interface)

2609

elif error.errno == errno.ENODEV:

2610

logger.error("Interface %s does not exist,"

2611

" cannot bind", self.interface)

2612

else:

2613

raise

2003

logger.error("SO_BINDTODEVICE does not exist;"

2004

" cannot bind to interface %s",

2005

self.interface)

2006

else:

2007

try:

2008

self.socket.setsockopt(

2009

socket.SOL_SOCKET, SO_BINDTODEVICE,

2010

(self.interface + "\0").encode("utf-8"))

2011

except socket.error as error:

2012

if error.errno == errno.EPERM:

2013

logger.error("No permission to bind to"

2014

" interface %s", self.interface)

2015

elif error.errno == errno.ENOPROTOOPT:

2016

logger.error("SO_BINDTODEVICE not available;"

2017

" cannot bind to interface %s",

2018

self.interface)

2019

elif error.errno == errno.ENODEV:

2020

logger.error("Interface %s does not exist,"

2021

" cannot bind", self.interface)

2022

else:

2023

raise

2614

2024

# Only bind(2) the socket if we really need to.

2615

2025

if self.server_address[0] or self.server_address[1]:

2616

if self.server_address[1]:

2617

self.allow_reuse_address = True

2618

2026

if not self.server_address[0]:

2619

2027

if self.address_family == socket.AF_INET6:

2620

any_address = "::" # in6addr_any

2028

any_address = "::" # in6addr_any

2621

2029

else:

2622

any_address = "0.0.0.0" # INADDR_ANY

2030

any_address = "0.0.0.0" # INADDR_ANY

2623

2031

self.server_address = (any_address,

2624

2032

self.server_address[1])

2625

2033

elif not self.server_address[1]:

2635

2043

2636

2044

class MandosServer(IPv6_TCPServer):

2637

2045

"""Mandos server.

2638

2046

2639

2047

Attributes:

2640

2048

clients: set of Client objects

2641

2049

gnutls_priority GnuTLS priority string

2642

2050

use_dbus: Boolean; to emit D-Bus signals or not

2643

2644

Assumes a GLib.MainLoop event loop.

2051

2052

Assumes a gobject.MainLoop event loop.

2645

2053

"""

2646

2054

2647

2055

def __init__(self, server_address, RequestHandlerClass,

2648

2056

interface=None,

2649

2057

use_ipv6=True,

2659

2067

self.gnutls_priority = gnutls_priority

2660

2068

IPv6_TCPServer.__init__(self, server_address,

2661

2069

RequestHandlerClass,

2662

interface=interface,

2663

use_ipv6=use_ipv6,

2664

socketfd=socketfd)

2665

2070

interface = interface,

2071

use_ipv6 = use_ipv6,

2072

socketfd = socketfd)

2073

2666

2074

def server_activate(self):

2667

2075

if self.enabled:

2668

2076

return socketserver.TCPServer.server_activate(self)

2669

2077

2670

2078

def enable(self):

2671

2079

self.enabled = True

2672

2080

2673

2081

def add_pipe(self, parent_pipe, proc):

2674

2082

# Call "handle_ipc" for both data and EOF events

2675

GLib.io_add_watch(

2083

gobject.io_add_watch(

2676

2084

parent_pipe.fileno(),

2677

GLib.IO_IN | GLib.IO_HUP,

2085

gobject.IO_IN | gobject.IO_HUP,

2678

2086

functools.partial(self.handle_ipc,

2679

parent_pipe=parent_pipe,

2680

proc=proc))

2681

2087

parent_pipe = parent_pipe,

2088

proc = proc))

2089

2682

2090

def handle_ipc(self, source, condition,

2683

2091

parent_pipe=None,

2684

proc=None,

2092

proc = None,

2685

2093

client_object=None):

2686

2094

# error, or the other end of multiprocessing.Pipe has closed

2687

if condition & (GLib.IO_ERR | GLib.IO_HUP):

2095

if condition & (gobject.IO_ERR | gobject.IO_HUP):

2688

2096

# Wait for other process to exit

2689

2097

proc.join()

2690

2098

return False

2691

2099

2692

2100

# Read a request from the child

2693

2101

request = parent_pipe.recv()

2694

2102

command = request[0]

2695

2103

2696

2104

if command == 'init':

2697

key_id = request[1].decode("ascii")

2698

fpr = request[2].decode("ascii")

2699

address = request[3]

2700

2701

for c in self.clients.values():

2702

if key_id == "E3B0C44298FC1C149AFBF4C8996FB92427AE41E4649B934CA495991B7852B855":

2703

continue

2704

if key_id and c.key_id == key_id:

2705

client = c

2706

break

2707

if fpr and c.fingerprint == fpr:

2105

fpr = request[1]

2106

address = request[2]

2107

2108

for c in self.clients.itervalues():

2109

if c.fingerprint == fpr:

2708

2110

client = c

2709

2111

break

2710

2112

else:

2711

logger.info("Client not found for key ID: %s, address"

2712

": %s", key_id or fpr, address)

2113

logger.info("Client not found for fingerprint: %s, ad"

2114

"dress: %s", fpr, address)

2713

2115

if self.use_dbus:

2714

2116

# Emit D-Bus signal

2715

mandos_dbus_service.ClientNotFound(key_id or fpr,

2117

mandos_dbus_service.ClientNotFound(fpr,

2716

2118

address[0])

2717

2119

parent_pipe.send(False)

2718

2120

return False

2719

2720

GLib.io_add_watch(

2121

2122

gobject.io_add_watch(

2721

2123

parent_pipe.fileno(),

2722

GLib.IO_IN | GLib.IO_HUP,

2124

gobject.IO_IN | gobject.IO_HUP,

2723

2125

functools.partial(self.handle_ipc,

2724

parent_pipe=parent_pipe,

2725

proc=proc,

2726

client_object=client))

2126

parent_pipe = parent_pipe,

2127

proc = proc,

2128

client_object = client))

2727

2129

parent_pipe.send(True)

2728

2130

# remove the old hook in favor of the new above hook on

2729

2131

# same fileno

2732

2134

funcname = request[1]

2733

2135

args = request[2]

2734

2136

kwargs = request[3]

2735

2137

2736

2138

parent_pipe.send(('data', getattr(client_object,

2737

2139

funcname)(*args,

2738

2140

**kwargs)))

2739

2141

2740

2142

if command == 'getattr':

2741

2143

attrname = request[1]

2742

2144

if isinstance(client_object.__getattribute__(attrname),

2745

2147

else:

2746

2148

parent_pipe.send((

2747

2149

'data', client_object.__getattribute__(attrname)))

2748

2150

2749

2151

if command == 'setattr':

2750

2152

attrname = request[1]

2751

2153

value = request[2]

2752

2154

setattr(client_object, attrname, value)

2753

2155

2754

2156

return True

2755

2157

2756

2158

2757

2159

def rfc3339_duration_to_delta(duration):

2758

2160

"""Parse an RFC 3339 "duration" and return a datetime.timedelta

2759

2161

2760

2162

>>> rfc3339_duration_to_delta("P7D")

2761

2163

datetime.timedelta(7)

2762

2164

>>> rfc3339_duration_to_delta("PT60S")

2772

2174

>>> rfc3339_duration_to_delta("P1DT3M20S")

2773

2175

datetime.timedelta(1, 200)

2774

2176

"""

2775

2177

2776

2178

# Parsing an RFC 3339 duration with regular expressions is not

2777

2179

# possible - there would have to be multiple places for the same

2778

2180

# values, like seconds. The current code, while more esoteric, is

2779

2181

# cleaner without depending on a parsing library. If Python had a

2780

2182

# built-in library for parsing we would use it, but we'd like to

2781

2183

# avoid excessive use of external libraries.

2782

2184

2783

2185

# New type for defining tokens, syntax, and semantics all-in-one

2784

2186

Token = collections.namedtuple("Token", (

2785

2187

"regexp", # To match token; if "value" is not None, must have

2818

2220

frozenset((token_year, token_month,

2819

2221

token_day, token_time,

2820

2222

token_week)))

2821

# Define starting values:

2822

# Value so far

2823

value = datetime.timedelta()

2223

# Define starting values

2224

value = datetime.timedelta() # Value so far

2824

2225

found_token = None

2825

# Following valid tokens

2826

followers = frozenset((token_duration, ))

2827

# String left to parse

2828

s = duration

2226

followers = frozenset((token_duration, )) # Following valid tokens

2227

s = duration # String left to parse

2829

2228

# Loop until end token is found

2830

2229

while found_token is not token_end:

2831

2230

# Search for any currently valid tokens

2855

2254

2856

2255

def string_to_delta(interval):

2857

2256

"""Parse a string and return a datetime.timedelta

2858

2257

2859

2258

>>> string_to_delta('7d')

2860

2259

datetime.timedelta(7)

2861

2260

>>> string_to_delta('60s')

2869

2268

>>> string_to_delta('5m 30s')

2870

2269

datetime.timedelta(0, 330)

2871

2270

"""

2872

2271

2873

2272

try:

2874

2273

return rfc3339_duration_to_delta(interval)

2875

2274

except ValueError:

2876

2275

pass

2877

2276

2878

2277

timevalue = datetime.timedelta(0)

2879

2278

for s in interval.split():

2880

2279

try:

2898

2297

return timevalue

2899

2298

2900

2299

2901

def daemon(nochdir=False, noclose=False):

2300

def daemon(nochdir = False, noclose = False):

2902

2301

"""See daemon(3). Standard BSD Unix function.

2903

2302

2904

2303

This should really exist as os.daemon, but it doesn't (yet)."""

2905

2304

if os.fork():

2906

2305

sys.exit()

2924

2323

2925

2324

2926

2325

def main():

2927

2326

2928

2327

##################################################################

2929

2328

# Parsing of options, both command line and config file

2930

2329

2931

2330

parser = argparse.ArgumentParser()

2932

2331

parser.add_argument("-v", "--version", action="version",

2933

version="%(prog)s {}".format(version),

2332

version = "%(prog)s {}".format(version),

2934

2333

help="show version number and exit")

2935

2334

parser.add_argument("-i", "--interface", metavar="IF",

2936

2335

help="Bind to interface IF")

2972

2371

parser.add_argument("--no-zeroconf", action="store_false",

2973

2372

dest="zeroconf", help="Do not use Zeroconf",

2974

2373

default=None)

2975

2374

2976

2375

options = parser.parse_args()

2977

2376

2978

2377

if options.check:

2979

2378

import doctest

2980

2379

fail_count, test_count = doctest.testmod()

2981

2380

sys.exit(os.EX_OK if fail_count == 0 else 1)

2982

2381

2983

2382

# Default values for config file for server-global settings

2984

if gnutls.has_rawpk:

2985

priority = ("SECURE128:!CTYPE-X.509:+CTYPE-RAWPK:!RSA"

2986

":!VERS-ALL:+VERS-TLS1.3:%PROFILE_ULTRA")

2987

else:

2988

priority = ("SECURE256:!CTYPE-X.509:+CTYPE-OPENPGP:!RSA"

2989

":+SIGN-DSA-SHA256")

2990

server_defaults = {"interface": "",

2991

"address": "",

2992

"port": "",

2993

"debug": "False",

2994

"priority": priority,

2995

"servicename": "Mandos",

2996

"use_dbus": "True",

2997

"use_ipv6": "True",

2998

"debuglevel": "",

2999

"restore": "True",

3000

"socket": "",

3001

"statedir": "/var/lib/mandos",

3002

"foreground": "False",

3003

"zeroconf": "True",

3004

}

3005

del priority

3006

2383

server_defaults = { "interface": "",

2384

"address": "",

2385

"port": "",

2386

"debug": "False",

2387

"priority":

2388

"SECURE256:!CTYPE-X.509:+CTYPE-OPENPGP:!RSA"

2389

":+SIGN-RSA-SHA224:+SIGN-RSA-RMD160",

2390

"servicename": "Mandos",

2391

"use_dbus": "True",

2392

"use_ipv6": "True",

2393

"debuglevel": "",

2394

"restore": "True",

2395

"socket": "",

2396

"statedir": "/var/lib/mandos",

2397

"foreground": "False",

2398

"zeroconf": "True",

2399

}

2400

3007

2401

# Parse config file for server-global settings

3008

server_config = configparser.ConfigParser(server_defaults)

2402

server_config = configparser.SafeConfigParser(server_defaults)

3009

2403

del server_defaults

3010

2404

server_config.read(os.path.join(options.configdir, "mandos.conf"))

3011

# Convert the ConfigParser object to a dict

2405

# Convert the SafeConfigParser object to a dict

3012

2406

server_settings = server_config.defaults()

3013

2407

# Use the appropriate methods on the non-string config options

3014

for option in ("debug", "use_dbus", "use_ipv6", "restore",

3015

"foreground", "zeroconf"):

2408

for option in ("debug", "use_dbus", "use_ipv6", "foreground"):

3016

2409

server_settings[option] = server_config.getboolean("DEFAULT",

3017

2410

option)

3018

2411

if server_settings["port"]:

3028

2421

server_settings["socket"] = os.dup(server_settings

3029

2422

["socket"])

3030

2423

del server_config

3031

2424

3032

2425

# Override the settings from the config file with command line

3033

2426

# options, if set.

3034

2427

for option in ("interface", "address", "port", "debug",

3052

2445

if server_settings["debug"]:

3053

2446

server_settings["foreground"] = True

3054

2447

# Now we have our good server settings in "server_settings"

3055

2448

3056

2449

##################################################################

3057

2450

3058

2451

if (not server_settings["zeroconf"]

3059

2452

and not (server_settings["port"]

3060

2453

or server_settings["socket"] != "")):

3061

2454

parser.error("Needs port or socket to work without Zeroconf")

3062

2455

3063

2456

# For convenience

3064

2457

debug = server_settings["debug"]

3065

2458

debuglevel = server_settings["debuglevel"]

3069

2462

stored_state_file)

3070

2463

foreground = server_settings["foreground"]

3071

2464

zeroconf = server_settings["zeroconf"]

3072

2465

3073

2466

if debug:

3074

2467

initlogger(debug, logging.DEBUG)

3075

2468

else:

3078

2471

else:

3079

2472

level = getattr(logging, debuglevel.upper())

3080

2473

initlogger(debug, level)

3081

2474

3082

2475

if server_settings["servicename"] != "Mandos":

3083

2476

syslogger.setFormatter(

3084

2477

logging.Formatter('Mandos ({}) [%(process)d]:'

3085

2478

' %(levelname)s: %(message)s'.format(

3086

2479

server_settings["servicename"])))

3087

2480

3088

2481

# Parse config file with clients

3089

client_config = configparser.ConfigParser(Client.client_defaults)

2482

client_config = configparser.SafeConfigParser(Client

2483

.client_defaults)

3090

2484

client_config.read(os.path.join(server_settings["configdir"],

3091

2485

"clients.conf"))

3092

2486

3093

2487

global mandos_dbus_service

3094

2488

mandos_dbus_service = None

3095

2489

3096

2490

socketfd = None

3097

2491

if server_settings["socket"] != "":

3098

2492

socketfd = server_settings["socket"]

3114

2508

except IOError as e:

3115

2509

logger.error("Could not open file %r", pidfilename,

3116

2510

exc_info=e)

3117

3118

for name, group in (("_mandos", "_mandos"),

3119

("mandos", "mandos"),

3120

("nobody", "nogroup")):

2511

2512

for name in ("_mandos", "mandos", "nobody"):

3121

2513

try:

3122

2514

uid = pwd.getpwnam(name).pw_uid

3123

gid = pwd.getpwnam(group).pw_gid

2515

gid = pwd.getpwnam(name).pw_gid

3124

2516

break

3125

2517

except KeyError:

3126

2518

continue

3130

2522

try:

3131

2523

os.setgid(gid)

3132

2524

os.setuid(uid)

3133

if debug:

3134

logger.debug("Did setuid/setgid to {}:{}".format(uid,

3135

gid))

3136

2525

except OSError as error:

3137

logger.warning("Failed to setuid/setgid to {}:{}: {}"

3138

.format(uid, gid, os.strerror(error.errno)))

3139

2526

if error.errno != errno.EPERM:

3140

2527

raise

3141

2528

3142

2529

if debug:

3143

2530

# Enable all possible GnuTLS debugging

3144

2531

3145

2532

# "Use a log level over 10 to enable all debugging options."

3146

2533

# - GnuTLS manual

3147

gnutls.global_set_log_level(11)

3148

3149

@gnutls.log_func

2534

gnutls.library.functions.gnutls_global_set_log_level(11)

2535

2536

@gnutls.library.types.gnutls_log_func

3150

2537

def debug_gnutls(level, string):

3151

2538

logger.debug("GnuTLS: %s", string[:-1])

3152

3153

gnutls.global_set_log_function(debug_gnutls)

3154

2539

2540

gnutls.library.functions.gnutls_global_set_log_function(

2541

debug_gnutls)

2542

3155

2543

# Redirect stdin so all checkers get /dev/null

3156

2544

null = os.open(os.devnull, os.O_NOCTTY | os.O_RDWR)

3157

2545

os.dup2(null, sys.stdin.fileno())

3158

2546

if null > 2:

3159

2547

os.close(null)

3160

2548

3161

2549

# Need to fork before connecting to D-Bus

3162

2550

if not foreground:

3163

2551

# Close all input and output, do double fork, etc.

3164

2552

daemon()

3165

3166

if gi.version_info < (3, 10, 2):

3167

# multiprocessing will use threads, so before we use GLib we

3168

# need to inform GLib that threads will be used.

3169

GLib.threads_init()

3170

2553

2554

# multiprocessing will use threads, so before we use gobject we

2555

# need to inform gobject that threads will be used.

2556

gobject.threads_init()

2557

3171

2558

global main_loop

3172

2559

# From the Avahi example code

3173

2560

DBusGMainLoop(set_as_default=True)

3174

main_loop = GLib.MainLoop()

2561

main_loop = gobject.MainLoop()

3175

2562

bus = dbus.SystemBus()

3176

2563

# End of Avahi example code

3177

2564

if use_dbus:

3190

2577

if zeroconf:

3191

2578

protocol = avahi.PROTO_INET6 if use_ipv6 else avahi.PROTO_INET

3192

2579

service = AvahiServiceToSyslog(

3193

name=server_settings["servicename"],

3194

servicetype="_mandos._tcp",

3195

protocol=protocol,

3196

bus=bus)

2580

name = server_settings["servicename"],

2581

servicetype = "_mandos._tcp",

2582

protocol = protocol,

2583

bus = bus)

3197

2584

if server_settings["interface"]:

3198

2585

service.interface = if_nametoindex(

3199

2586

server_settings["interface"].encode("utf-8"))

3200

2587

3201

2588

global multiprocessing_manager

3202

2589

multiprocessing_manager = multiprocessing.Manager()

3203

2590

3204

2591

client_class = Client

3205

2592

if use_dbus:

3206

client_class = functools.partial(ClientDBus, bus=bus)

3207

2593

client_class = functools.partial(ClientDBus, bus = bus)

2594

3208

2595

client_settings = Client.config_parser(client_config)

3209

2596

old_client_settings = {}

3210

2597

clients_data = {}

3211

2598

3212

2599

# This is used to redirect stdout and stderr for checker processes

3213

2600

global wnull

3214

wnull = open(os.devnull, "w") # A writable /dev/null

2601

wnull = open(os.devnull, "w") # A writable /dev/null

3215

2602

# Only used if server is running in foreground but not in debug

3216

2603

# mode

3217

2604

if debug or not foreground:

3218

2605

wnull.close()

3219

2606

3220

2607

# Get client data and settings from last running state.

3221

2608

if server_settings["restore"]:

3222

2609

try:

3223

2610

with open(stored_state_path, "rb") as stored_state:

3224

if sys.version_info.major == 2:

3225

clients_data, old_client_settings = pickle.load(

3226

stored_state)

3227

else:

3228

bytes_clients_data, bytes_old_client_settings = (

3229

pickle.load(stored_state, encoding="bytes"))

3230

# Fix bytes to strings

3231

# clients_data

3232

# .keys()

3233

clients_data = {(key.decode("utf-8")

3234

if isinstance(key, bytes)

3235

else key): value

3236

for key, value in

3237

bytes_clients_data.items()}

3238

del bytes_clients_data

3239

for key in clients_data:

3240

value = {(k.decode("utf-8")

3241

if isinstance(k, bytes) else k): v

3242

for k, v in

3243

clients_data[key].items()}

3244

clients_data[key] = value

3245

# .client_structure

3246

value["client_structure"] = [

3247

(s.decode("utf-8")

3248

if isinstance(s, bytes)

3249

else s) for s in

3250

value["client_structure"]]

3251

# .name & .host

3252

for k in ("name", "host"):

3253

if isinstance(value[k], bytes):

3254

value[k] = value[k].decode("utf-8")

3255

if "key_id" not in value:

3256

value["key_id"] = ""

3257

elif "fingerprint" not in value:

3258

value["fingerprint"] = ""

3259

# old_client_settings

3260

# .keys()

3261

old_client_settings = {

3262

(key.decode("utf-8")

3263

if isinstance(key, bytes)

3264

else key): value

3265

for key, value in

3266

bytes_old_client_settings.items()}

3267

del bytes_old_client_settings

3268

# .host

3269

for value in old_client_settings.values():

3270

if isinstance(value["host"], bytes):

3271

value["host"] = (value["host"]

3272

.decode("utf-8"))

2611

clients_data, old_client_settings = pickle.load(

2612

stored_state)

3273

2613

os.remove(stored_state_path)

3274

2614

except IOError as e:

3275

2615

if e.errno == errno.ENOENT:

3283

2623

logger.warning("Could not load persistent state: "

3284

2624

"EOFError:",

3285

2625

exc_info=e)

3286

2626

3287

2627

with PGPEngine() as pgp:

3288

2628

for client_name, client in clients_data.items():

3289

2629

# Skip removed clients

3290

2630

if client_name not in client_settings:

3291

2631

continue

3292

2632

3293

2633

# Decide which value to use after restoring saved state.

3294

2634

# We have three different values: Old config file,

3295

2635

# new config file, and saved state.

3306

2646

client[name] = value

3307

2647

except KeyError:

3308

2648

pass

3309

2649

3310

2650

# Clients who has passed its expire date can still be

3311

2651

# enabled if its last checker was successful. A Client

3312

2652

# whose checker succeeded before we stored its state is

3345

2685

client_name))

3346

2686

client["secret"] = (client_settings[client_name]

3347

2687

["secret"])

3348

2688

3349

2689

# Add/remove clients based on new changes made to config

3350

2690

for client_name in (set(old_client_settings)

3351

2691

- set(client_settings)):

3353

2693

for client_name in (set(client_settings)

3354

2694

- set(old_client_settings)):

3355

2695

clients_data[client_name] = client_settings[client_name]

3356

2696

3357

2697

# Create all client objects

3358

2698

for client_name, client in clients_data.items():

3359

2699

tcp_server.clients[client_name] = client_class(

3360

name=client_name,

3361

settings=client,

3362

server_settings=server_settings)

3363

2700

name = client_name,

2701

settings = client,

2702

server_settings = server_settings)

2703

3364

2704

if not tcp_server.clients:

3365

2705

logger.warning("No clients defined")

3366

2706

3367

2707

if not foreground:

3368

2708

if pidfile is not None:

3369

2709

pid = os.getpid()

3375

2715

pidfilename, pid)

3376

2716

del pidfile

3377

2717

del pidfilename

3378

3379

for termsig in (signal.SIGHUP, signal.SIGTERM):

3380

GLib.unix_signal_add(GLib.PRIORITY_HIGH, termsig,

3381

lambda: main_loop.quit() and False)

3382

2718

2719

signal.signal(signal.SIGHUP, lambda signum, frame: sys.exit())

2720

signal.signal(signal.SIGTERM, lambda signum, frame: sys.exit())

2721

3383

2722

if use_dbus:

3384

2723

3385

2724

@alternate_dbus_interfaces(

3386

{"se.recompile.Mandos": "se.bsnet.fukt.Mandos"})

3387

class MandosDBusService(DBusObjectWithObjectManager):

2725

{ "se.recompile.Mandos": "se.bsnet.fukt.Mandos" })

2726

class MandosDBusService(DBusObjectWithProperties):

3388

2727

"""A D-Bus proxy object"""

3389

2728

3390

2729

def __init__(self):

3391

2730

dbus.service.Object.__init__(self, bus, "/")

3392

2731

3393

2732

_interface = "se.recompile.Mandos"

3394

2733

2734

@dbus_interface_annotations(_interface)

2735

def _foo(self):

2736

return {

2737

"org.freedesktop.DBus.Property.EmitsChangedSignal":

2738

"false" }

2739

3395

2740

@dbus.service.signal(_interface, signature="o")

3396

2741

def ClientAdded(self, objpath):

3397

2742

"D-Bus signal"

3398

2743

pass

3399

2744

3400

2745

@dbus.service.signal(_interface, signature="ss")

3401

def ClientNotFound(self, key_id, address):

2746

def ClientNotFound(self, fingerprint, address):

3402

2747

"D-Bus signal"

3403

2748

pass

3404

3405

@dbus_annotations({"org.freedesktop.DBus.Deprecated":

3406

"true"})

2749

3407

2750

@dbus.service.signal(_interface, signature="os")

3408

2751

def ClientRemoved(self, objpath, name):

3409

2752

"D-Bus signal"

3410

2753

pass

3411

3412

@dbus_annotations({"org.freedesktop.DBus.Deprecated":

3413

"true"})

2754

3414

2755

@dbus.service.method(_interface, out_signature="ao")

3415

2756

def GetAllClients(self):

3416

2757

"D-Bus method"

3417

2758

return dbus.Array(c.dbus_object_path for c in

3418

tcp_server.clients.values())

3419

3420

@dbus_annotations({"org.freedesktop.DBus.Deprecated":

3421

"true"})

2759

tcp_server.clients.itervalues())

2760

3422

2761

@dbus.service.method(_interface,

3423

2762

out_signature="a{oa{sv}}")

3424

2763

def GetAllClientsWithProperties(self):

3425

2764

"D-Bus method"

3426

2765

return dbus.Dictionary(

3427

{c.dbus_object_path: c.GetAll(

3428

"se.recompile.Mandos.Client")

3429

for c in tcp_server.clients.values()},

2766

{ c.dbus_object_path: c.GetAll("")

2767

for c in tcp_server.clients.itervalues() },

3430

2768

signature="oa{sv}")

3431

2769

3432

2770

@dbus.service.method(_interface, in_signature="o")

3433

2771

def RemoveClient(self, object_path):

3434

2772

"D-Bus method"

3435

for c in tcp_server.clients.values():

2773

for c in tcp_server.clients.itervalues():

3436

2774

if c.dbus_object_path == object_path:

3437

2775

del tcp_server.clients[c.name]

3438

2776

c.remove_from_connection()

3439

# Don't signal the disabling

2777

# Don't signal anything except ClientRemoved

3440

2778

c.disable(quiet=True)

3441

# Emit D-Bus signal for removal

3442

self.client_removed_signal(c)

2779

# Emit D-Bus signal

2780

self.ClientRemoved(object_path, c.name)

3443

2781

return

3444

2782

raise KeyError(object_path)

3445

2783

3446

2784

del _interface

3447

3448

@dbus.service.method(dbus.OBJECT_MANAGER_IFACE,

3449

out_signature="a{oa{sa{sv}}}")

3450

def GetManagedObjects(self):

3451

"""D-Bus method"""

3452

return dbus.Dictionary(

3453

{client.dbus_object_path:

3454

dbus.Dictionary(

3455

{interface: client.GetAll(interface)

3456

for interface in

3457

client._get_all_interface_names()})

3458

for client in tcp_server.clients.values()})

3459

3460

def client_added_signal(self, client):

3461

"""Send the new standard signal and the old signal"""

3462

if use_dbus:

3463

# New standard signal

3464

self.InterfacesAdded(

3465

client.dbus_object_path,

3466

dbus.Dictionary(

3467

{interface: client.GetAll(interface)

3468

for interface in

3469

client._get_all_interface_names()}))

3470

# Old signal

3471

self.ClientAdded(client.dbus_object_path)

3472

3473

def client_removed_signal(self, client):

3474

"""Send the new standard signal and the old signal"""

3475

if use_dbus:

3476

# New standard signal

3477

self.InterfacesRemoved(

3478

client.dbus_object_path,

3479

client._get_all_interface_names())

3480

# Old signal

3481

self.ClientRemoved(client.dbus_object_path,

3482

client.name)

3483

2785

3484

2786

mandos_dbus_service = MandosDBusService()

3485

3486

# Save modules to variables to exempt the modules from being

3487

# unloaded before the function registered with atexit() is run.

3488

mp = multiprocessing

3489

wn = wnull

3490

2787

3491

2788

def cleanup():

3492

2789

"Cleanup function; run on exit"

3493

2790

if zeroconf:

3494

2791

service.cleanup()

3495

3496

mp.active_children()

3497

wn.close()

2792

2793

multiprocessing.active_children()

2794

wnull.close()

3498

2795

if not (tcp_server.clients or client_settings):

3499

2796

return

3500

2797

3501

2798

# Store client before exiting. Secrets are encrypted with key

3502

2799

# based on what config file has. If config file is

3503

2800

# removed/edited, old secret will thus be unrecovable.

3504

2801

clients = {}

3505

2802

with PGPEngine() as pgp:

3506

for client in tcp_server.clients.values():

2803

for client in tcp_server.clients.itervalues():

3507

2804

key = client_settings[client.name]["secret"]

3508

2805

client.encrypted_secret = pgp.encrypt(client.secret,

3509

2806

key)

3510

2807

client_dict = {}

3511

2808

3512

2809

# A list of attributes that can not be pickled

3513

2810

# + secret.

3514

exclude = {"bus", "changedstate", "secret",

3515

"checker", "server_settings"}

2811

exclude = { "bus", "changedstate", "secret",

2812

"checker", "server_settings" }

3516

2813

for name, typ in inspect.getmembers(dbus.service

3517

2814

.Object):

3518

2815

exclude.add(name)

3519

2816

3520

2817

client_dict["encrypted_secret"] = (client

3521

2818

.encrypted_secret)

3522

2819

for attr in client.client_structure:

3523

2820

if attr not in exclude:

3524

2821

client_dict[attr] = getattr(client, attr)

3525

2822

3526

2823

clients[client.name] = client_dict

3527

2824

del client_settings[client.name]["secret"]

3528

2825

3529

2826

try:

3530

2827

with tempfile.NamedTemporaryFile(

3531

2828

mode='wb',

3533

2830

prefix='clients-',

3534

2831

dir=os.path.dirname(stored_state_path),

3535

2832

delete=False) as stored_state:

3536

pickle.dump((clients, client_settings), stored_state,

3537

protocol=2)

2833

pickle.dump((clients, client_settings), stored_state)

3538

2834

tempname = stored_state.name

3539

2835

os.rename(tempname, stored_state_path)

3540

2836

except (IOError, OSError) as e:

3550

2846

logger.warning("Could not save persistent state:",

3551

2847

exc_info=e)

3552

2848

raise

3553

2849

3554

2850

# Delete all clients, and settings from config

3555

2851

while tcp_server.clients:

3556

2852

name, client = tcp_server.clients.popitem()

3557

2853

if use_dbus:

3558

2854

client.remove_from_connection()

3559

# Don't signal the disabling

2855

# Don't signal anything except ClientRemoved

3560

2856

client.disable(quiet=True)

3561

# Emit D-Bus signal for removal

3562

2857

if use_dbus:

3563

mandos_dbus_service.client_removed_signal(client)

2858

# Emit D-Bus signal

2859

mandos_dbus_service.ClientRemoved(

2860

client.dbus_object_path, client.name)

3564

2861

client_settings.clear()

3565

2862

3566

2863

atexit.register(cleanup)

3567

3568

for client in tcp_server.clients.values():

2864

2865

for client in tcp_server.clients.itervalues():

3569

2866

if use_dbus:

3570

# Emit D-Bus signal for adding

3571

mandos_dbus_service.client_added_signal(client)

2867

# Emit D-Bus signal

2868

mandos_dbus_service.ClientAdded(client.dbus_object_path)

3572

2869

# Need to initiate checking of clients

3573

2870

if client.enabled:

3574

2871

client.init_checker()

3575

2872

3576

2873

tcp_server.enable()

3577

2874

tcp_server.server_activate()

3578

2875

3579

2876

# Find out what port we got

3580

2877

if zeroconf:

3581

2878

service.port = tcp_server.socket.getsockname()[1]

3586

2883

else: # IPv4

3587

2884

logger.info("Now listening on address %r, port %d",

3588

2885

*tcp_server.socket.getsockname())

3589

3590

# service.interface = tcp_server.socket.getsockname()[3]

3591

2886

2887

#service.interface = tcp_server.socket.getsockname()[3]

2888

3592

2889

try:

3593

2890

if zeroconf:

3594

2891

# From the Avahi example code

3599

2896

cleanup()

3600

2897

sys.exit(1)

3601

2898

# End of Avahi example code

3602

3603

GLib.io_add_watch(tcp_server.fileno(), GLib.IO_IN,

3604

lambda *args, **kwargs:

3605

(tcp_server.handle_request

3606

(*args[2:], **kwargs) or True))

3607

2899

2900

gobject.io_add_watch(tcp_server.fileno(), gobject.IO_IN,

2901

lambda *args, **kwargs:

2902

(tcp_server.handle_request

2903

(*args[2:], **kwargs) or True))

2904

3608

2905

logger.debug("Starting main loop")

3609

2906

main_loop.run()

3610

2907

except AvahiError as error: