/mandos/release : revision 237.7.707

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#!/usr/bin/python2.7

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#!/usr/bin/python

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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 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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#

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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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# the Free Software Foundation, either version 3 of the License, or

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# (at your option) any later version.

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#

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

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

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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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# 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 this program. If not, see

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

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#

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# along with Mandos. If not, see <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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from future_builtins import *

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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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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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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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import gi

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from gi.repository import GLib

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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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SO_BINDTODEVICE = None

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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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if sys.version_info.major == 2:

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str = unicode

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version = "1.6.9"

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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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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(object):

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class PGPEngine:

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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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'--home', self.tempdir,

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'--homedir', self.tempdir,

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'--force-mdc',

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'--quiet',

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'--no-use-agent']

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'--quiet']

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

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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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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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200

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def encrypt(self, data, password):

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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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251

passfile.write(passphrase)

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passfile.flush()

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

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proc = subprocess.Popen([self.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)

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stdin=subprocess.PIPE,

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stdout=subprocess.PIPE,

259

stderr=subprocess.PIPE)

260

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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264

218

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def decrypt(self, data, password):

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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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270

passfile.flush()

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

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proc = subprocess.Popen([self.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,

229

stdout = subprocess.PIPE,

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stderr = subprocess.PIPE)

231

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

275

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

285

class avahi:

286

"""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"

293

DBUS_INTERFACE_SERVER = DBUS_NAME + ".Server"

294

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

305

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

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class AvahiError(Exception):

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

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self.value = value

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pass

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323

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324

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class AvahiService(object):

325

class AvahiService:

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"""An Avahi (Zeroconf) service.

254

327

255

328

Attributes:

256

329

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

257

330

Used to optionally bind to the specified interface.

269

342

server: D-Bus Server

270

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bus: dbus.SystemBus()

271

344

"""

272

345

273

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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,

278

TXT = None,

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domain = "",

280

host = "",

281

max_renames = 32768,

282

protocol = avahi.PROTO_UNSPEC,

283

bus = None):

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interface=avahi.IF_UNSPEC,

348

name=None,

349

servicetype=None,

350

port=None,

351

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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self.name = name

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359

self.type = servicetype

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368

self.server = None

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369

self.bus = bus

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370

self.entry_group_state_changed_match = None

298

371

299

372

def rename(self, remove=True):

300

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

301

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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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395

self.cleanup()

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os._exit(1)

324

397

325

398

def remove(self):

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

327

400

if self.entry_group_state_changed_match is not None:

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402

self.entry_group_state_changed_match = None

330

403

if self.group is not None:

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404

self.group.Reset()

332

405

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406

def add(self):

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

335

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self.remove()

352

425

dbus.UInt16(self.port),

353

426

avahi.string_array_to_txt_array(self.TXT))

354

427

self.group.Commit()

355

428

356

429

def entry_group_state_changed(self, state, error):

357

430

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

358

431

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

359

432

360

433

if state == avahi.ENTRY_GROUP_ESTABLISHED:

361

434

logger.debug("Zeroconf service established.")

362

435

elif state == avahi.ENTRY_GROUP_COLLISION:

366

439

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

367

440

str(error))

368

441

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

369

442

370

443

def cleanup(self):

371

444

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

372

445

if self.group is not None:

377

450

pass

378

451

self.group = None

379

452

self.remove()

380

453

381

454

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

382

455

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

383

456

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

395

468

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

396

469

self.cleanup()

397

470

elif state == avahi.SERVER_RUNNING:

398

self.add()

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)

399

483

else:

400

484

if error is None:

401

485

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

402

486

else:

403

487

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

404

488

405

489

def activate(self):

406

490

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

407

491

if self.server is None:

418

502

class AvahiServiceToSyslog(AvahiService):

419

503

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

420

504

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

421

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

505

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

422

506

syslogger.setFormatter(logging.Formatter(

423

507

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

424

508

.format(self.name)))

425

509

return ret

426

510

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

427

813

def call_pipe(connection, # : multiprocessing.Connection

428

814

func, *args, **kwargs):

429

815

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

430

816

431

817

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

432

818

return value on the provided multiprocessing.Connection.

433

819

"""

434

820

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

435

821

connection.close()

436

822

437

class Client(object):

823

824

class Client:

438

825

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

439

826

440

827

Attributes:

441

828

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

442

829

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

443

830

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

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

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

448

835

checker_command: string; External command which is run to check

449

836

if client lives. %() expansions are done at

450

837

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

451

838

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

452

checker_initiator_tag: a gobject event source tag, or None

839

checker_initiator_tag: a GLib event source tag, or None

453

840

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

454

841

client_structure: Object describing what attributes a client has

455

842

and is used for storing the client at exit

456

843

current_checker_command: string; current running checker_command

457

disable_initiator_tag: a gobject event source tag, or None

844

disable_initiator_tag: a GLib event source tag, or None

458

845

enabled: bool()

459

846

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

460

uniquely identify the client

847

uniquely identify an OpenPGP client

848

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

849

a client using raw public keys

461

850

host: string; available for use by the checker command

462

851

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

463

852

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

479

868

disabled, or None

480

869

server_settings: The server_settings dict from main()

481

870

"""

482

871

483

872

runtime_expansions = ("approval_delay", "approval_duration",

484

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

873

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

485

874

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

486

875

"last_approval_request", "last_checked_ok",

487

876

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

496

885

"approved_by_default": "True",

497

886

"enabled": "True",

498

887

}

499

888

500

889

@staticmethod

501

890

def config_parser(config):

502

891

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

509

898

for client_name in config.sections():

510

899

section = dict(config.items(client_name))

511

900

client = settings[client_name] = {}

512

901

513

902

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

514

903

# Reformat values from string types to Python types

515

904

client["approved_by_default"] = config.getboolean(

516

905

client_name, "approved_by_default")

517

906

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

518

907

"enabled")

519

520

# Uppercase and remove spaces from fingerprint for later

521

# comparison purposes with return value from the

522

# fingerprint() function

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(" ", ""))

523

914

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

524

915

.replace(" ", ""))

525

916

if "secret" in section:

526

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

917

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

918

.encode("utf-8"),

919

"base64")

527

920

elif "secfile" in section:

528

921

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

529

922

(section["secfile"])),

544

937

client["last_approval_request"] = None

545

938

client["last_checked_ok"] = None

546

939

client["last_checker_status"] = -2

547

940

548

941

return settings

549

550

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

942

943

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

551

944

self.name = name

552

945

if server_settings is None:

553

946

server_settings = {}

555

948

# adding all client settings

556

949

for setting, value in settings.items():

557

950

setattr(self, setting, value)

558

951

559

952

if self.enabled:

560

953

if not hasattr(self, "last_enabled"):

561

954

self.last_enabled = datetime.datetime.utcnow()

565

958

else:

566

959

self.last_enabled = None

567

960

self.expires = None

568

961

569

962

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

963

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

570

964

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

571

965

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

572

966

datetime.datetime.utcnow())

573

967

574

968

# attributes specific for this server instance

575

969

self.checker = None

576

970

self.checker_initiator_tag = None

582

976

self.changedstate = multiprocessing_manager.Condition(

583

977

multiprocessing_manager.Lock())

584

978

self.client_structure = [attr

585

for attr in self.__dict__.iterkeys()

979

for attr in self.__dict__.keys()

586

980

if not attr.startswith("_")]

587

981

self.client_structure.append("client_structure")

588

982

589

983

for name, t in inspect.getmembers(

590

984

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

591

985

if not name.startswith("_"):

592

986

self.client_structure.append(name)

593

987

594

988

# Send notice to process children that client state has changed

595

989

def send_changedstate(self):

596

990

with self.changedstate:

597

991

self.changedstate.notify_all()

598

992

599

993

def enable(self):

600

994

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

601

995

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

606

1000

self.last_enabled = datetime.datetime.utcnow()

607

1001

self.init_checker()

608

1002

self.send_changedstate()

609

1003

610

1004

def disable(self, quiet=True):

611

1005

"""Disable this client."""

612

1006

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

614

1008

if not quiet:

615

1009

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

616

1010

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

617

gobject.source_remove(self.disable_initiator_tag)

1011

GLib.source_remove(self.disable_initiator_tag)

618

1012

self.disable_initiator_tag = None

619

1013

self.expires = None

620

1014

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

621

gobject.source_remove(self.checker_initiator_tag)

1015

GLib.source_remove(self.checker_initiator_tag)

622

1016

self.checker_initiator_tag = None

623

1017

self.stop_checker()

624

1018

self.enabled = False

625

1019

if not quiet:

626

1020

self.send_changedstate()

627

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

1021

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

628

1022

return False

629

1023

630

1024

def __del__(self):

631

1025

self.disable()

632

1026

633

1027

def init_checker(self):

634

1028

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

635

1029

# and every interval from then on.

636

1030

if self.checker_initiator_tag is not None:

637

gobject.source_remove(self.checker_initiator_tag)

638

self.checker_initiator_tag = gobject.timeout_add(

1031

GLib.source_remove(self.checker_initiator_tag)

1032

self.checker_initiator_tag = GLib.timeout_add(

639

1033

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

640

1034

self.start_checker)

641

1035

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

642

1036

if self.disable_initiator_tag is not None:

643

gobject.source_remove(self.disable_initiator_tag)

644

self.disable_initiator_tag = gobject.timeout_add(

1037

GLib.source_remove(self.disable_initiator_tag)

1038

self.disable_initiator_tag = GLib.timeout_add(

645

1039

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

646

1040

# Also start a new checker *right now*.

647

1041

self.start_checker()

648

1042

649

1043

def checker_callback(self, source, condition, connection,

650

1044

command):

651

1045

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

652

self.checker_callback_tag = None

653

self.checker = None

654

1046

# Read return code from connection (see call_pipe)

655

1047

returncode = connection.recv()

656

1048

connection.close()

657

1049

self.checker.join()

1050

self.checker_callback_tag = None

1051

self.checker = None

1052

658

1053

if returncode >= 0:

659

1054

self.last_checker_status = returncode

660

1055

self.last_checker_signal = None

670

1065

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

671

1066

vars(self))

672

1067

return False

673

1068

674

1069

def checked_ok(self):

675

1070

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

676

1071

self.last_checked_ok = datetime.datetime.utcnow()

677

1072

self.last_checker_status = 0

678

1073

self.last_checker_signal = None

679

1074

self.bump_timeout()

680

1075

681

1076

def bump_timeout(self, timeout=None):

682

1077

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

683

1078

if timeout is None:

684

1079

timeout = self.timeout

685

1080

if self.disable_initiator_tag is not None:

686

gobject.source_remove(self.disable_initiator_tag)

1081

GLib.source_remove(self.disable_initiator_tag)

687

1082

self.disable_initiator_tag = None

688

1083

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

689

self.disable_initiator_tag = gobject.timeout_add(

1084

self.disable_initiator_tag = GLib.timeout_add(

690

1085

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

691

1086

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

692

1087

693

1088

def need_approval(self):

694

1089

self.last_approval_request = datetime.datetime.utcnow()

695

1090

696

1091

def start_checker(self):

697

1092

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

698

1093

699

1094

If a checker already exists, leave it running and do

700

1095

nothing."""

701

1096

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

706

1101

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

707

1102

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

708

1103

# should be.

709

1104

710

1105

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

711

1106

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

712

1107

self.checker.join()

716

1111

# Escape attributes for the shell

717

1112

escaped_attrs = {

718

1113

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

719

for attr in self.runtime_expansions }

1114

for attr in self.runtime_expansions}

720

1115

try:

721

1116

command = self.checker_command % escaped_attrs

722

1117

except TypeError as error:

734

1129

# The exception is when not debugging but nevertheless

735

1130

# running in the foreground; use the previously

736

1131

# created wnull.

737

popen_args = { "close_fds": True,

738

"shell": True,

739

"cwd": "/" }

1132

popen_args = {"close_fds": True,

1133

"shell": True,

1134

"cwd": "/"}

740

1135

if (not self.server_settings["debug"]

741

1136

and self.server_settings["foreground"]):

742

1137

popen_args.update({"stdout": wnull,

743

"stderr": wnull })

744

pipe = multiprocessing.Pipe(duplex = False)

1138

"stderr": wnull})

1139

pipe = multiprocessing.Pipe(duplex=False)

745

1140

self.checker = multiprocessing.Process(

746

target = call_pipe,

747

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

748

kwargs = popen_args)

1141

target=call_pipe,

1142

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

1143

kwargs=popen_args)

749

1144

self.checker.start()

750

self.checker_callback_tag = gobject.io_add_watch(

751

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

1145

self.checker_callback_tag = GLib.io_add_watch(

1146

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

752

1147

self.checker_callback, pipe[0], command)

753

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

1148

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

754

1149

return True

755

1150

756

1151

def stop_checker(self):

757

1152

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

758

1153

if self.checker_callback_tag:

759

gobject.source_remove(self.checker_callback_tag)

1154

GLib.source_remove(self.checker_callback_tag)

760

1155

self.checker_callback_tag = None

761

1156

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

762

1157

return

771

1166

byte_arrays=False):

772

1167

"""Decorators for marking methods of a DBusObjectWithProperties to

773

1168

become properties on the D-Bus.

774

1169

775

1170

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

776

1171

and with one argument by "Set".

777

1172

778

1173

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

779

1174

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

780

1175

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

784

1179

if byte_arrays and signature != "ay":

785

1180

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

786

1181

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

787

1182

788

1183

def decorator(func):

789

1184

func._dbus_is_property = True

790

1185

func._dbus_interface = dbus_interface

793

1188

func._dbus_name = func.__name__

794

1189

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

795

1190

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

796

func._dbus_get_args_options = {'byte_arrays': byte_arrays }

1191

func._dbus_get_args_options = {'byte_arrays': byte_arrays}

797

1192

return func

798

1193

799

1194

return decorator

800

1195

801

1196

802

1197

def dbus_interface_annotations(dbus_interface):

803

1198

"""Decorator for marking functions returning interface annotations

804

1199

805

1200

Usage:

806

1201

807

1202

@dbus_interface_annotations("org.example.Interface")

808

1203

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

809

1204

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

810

1205

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

811

1206

"false"}

812

1207

"""

813

1208

814

1209

def decorator(func):

815

1210

func._dbus_is_interface = True

816

1211

func._dbus_interface = dbus_interface

817

1212

func._dbus_name = dbus_interface

818

1213

return func

819

1214

820

1215

return decorator

821

1216

822

1217

823

1218

def dbus_annotations(annotations):

824

1219

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

825

1220

Usage:

826

1221

827

1222

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

828

1223

"org.freedesktop.DBus.Property."

829

1224

"EmitsChangedSignal": "false"})

831

1226

access="r")

832

1227

def Property_dbus_property(self):

833

1228

return dbus.Boolean(False)

1229

1230

See also the DBusObjectWithAnnotations class.

834

1231

"""

835

1232

836

1233

def decorator(func):

837

1234

func._dbus_annotations = annotations

838

1235

return func

839

1236

840

1237

return decorator

841

1238

842

1239

858

1255

pass

859

1256

860

1257

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.

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.

867

1263

"""

868

1264

869

1265

@staticmethod

870

1266

def _is_dbus_thing(thing):

871

1267

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

872

1268

873

1269

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

874

1270

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

875

1271

"""

876

1272

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

877

1273

False)

878

1274

879

1275

def _get_all_dbus_things(self, thing):

880

1276

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

881

1277

"""

884

1280

for cls in self.__class__.__mro__

885

1281

for name, athing in

886

1282

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

887

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

888

1355

def _get_dbus_property(self, interface_name, property_name):

889

1356

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

890

1357

property with the specified name and interface.

895

1362

if (value._dbus_name == property_name

896

1363

and value._dbus_interface == interface_name):

897

1364

return value.__get__(self)

898

1365

899

1366

# No such property

900

1367

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

901

1368

self.dbus_object_path, interface_name, property_name))

902

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

903

1379

@dbus.service.method(dbus.PROPERTIES_IFACE,

904

1380

in_signature="ss",

905

1381

out_signature="v")

913

1389

if not hasattr(value, "variant_level"):

914

1390

return value

915

1391

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

916

1392

917

1393

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

918

1394

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

919

1395

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

931

1407

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

932

1408

for byte in value))

933

1409

prop(value)

934

1410

935

1411

@dbus.service.method(dbus.PROPERTIES_IFACE,

936

1412

in_signature="s",

937

1413

out_signature="a{sv}")

938

1414

def GetAll(self, interface_name):

939

1415

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

940

1416

standard.

941

1417

942

1418

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

943

1419

"""

944

1420

properties = {}

955

1431

properties[name] = value

956

1432

continue

957

1433

properties[name] = type(value)(

958

value, variant_level = value.variant_level + 1)

1434

value, variant_level=value.variant_level + 1)

959

1435

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

960

1436

961

1437

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

962

1438

def PropertiesChanged(self, interface_name, changed_properties,

963

1439

invalidated_properties):

965

1441

standard.

966

1442

"""

967

1443

pass

968

1444

969

1445

@dbus.service.method(dbus.INTROSPECTABLE_IFACE,

970

1446

out_signature="s",

971

1447

path_keyword='object_path',

972

1448

connection_keyword='connection')

973

1449

def Introspect(self, object_path, connection):

974

1450

"""Overloading of standard D-Bus method.

975

1451

976

1452

Inserts property tags and interface annotation tags.

977

1453

"""

978

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

979

connection)

1454

xmlstring = DBusObjectWithAnnotations.Introspect(self,

1455

object_path,

1456

connection)

980

1457

try:

981

1458

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

982

1459

983

1460

def make_tag(document, name, prop):

984

1461

e = document.createElement("property")

985

1462

e.setAttribute("name", name)

986

1463

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

987

1464

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

988

1465

return e

989

1466

990

1467

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

991

1468

# Add property tags

992

1469

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

995

1472

if prop._dbus_interface

996

1473

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

997

1474

if_tag.appendChild(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)

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)

1027

1491

# Add the names to the return values for the

1028

1492

# "org.freedesktop.DBus.Properties" methods

1029

1493

if (if_tag.getAttribute("name")

1048

1512

return xmlstring

1049

1513

1050

1514

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

1051

1586

def datetime_to_dbus(dt, variant_level=0):

1052

1587

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

1053

1588

if dt is None:

1054

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

1589

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

1055

1590

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

1056

1591

1057

1592

1060

1595

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

1061

1596

interface names according to the "alt_interface_names" mapping.

1062

1597

Usage:

1063

1598

1064

1599

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

1065

1600

"net.example.AlternateInterface"})

1066

1601

class SampleDBusObject(dbus.service.Object):

1067

1602

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

1068

1603

def SampleDBusMethod():

1069

1604

pass

1070

1605

1071

1606

The above "SampleDBusMethod" on "SampleDBusObject" will be

1072

1607

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

1073

1608

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

1074

1609

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

1075

1610

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

1076

1611

1077

1612

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

1078

1613

(from DBusObjectWithProperties) and interfaces (from the

1079

1614

dbus_interface_annotations decorator).

1080

1615

"""

1081

1616

1082

1617

def wrapper(cls):

1083

1618

for orig_interface_name, alt_interface_name in (

1084

1619

alt_interface_names.items()):

1099

1634

interface_names.add(alt_interface)

1100

1635

# Is this a D-Bus signal?

1101

1636

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

1637

# Extract the original non-method undecorated

1638

# function by black magic

1102

1639

if sys.version_info.major == 2:

1103

# Extract the original non-method undecorated

1104

# function by black magic

1105

1640

nonmethod_func = (dict(

1106

1641

zip(attribute.func_code.co_freevars,

1107

1642

attribute.__closure__))

1108

1643

["func"].cell_contents)

1109

1644

else:

1110

nonmethod_func = attribute

1645

nonmethod_func = (dict(

1646

zip(attribute.__code__.co_freevars,

1647

attribute.__closure__))

1648

["func"].cell_contents)

1111

1649

# Create a new, but exactly alike, function

1112

1650

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

1113

1651

# with the alternate D-Bus interface name

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__)

1652

new_function = copy_function(nonmethod_func)

1128

1653

new_function = (dbus.service.signal(

1129

1654

alt_interface,

1130

1655

attribute._dbus_signature)(new_function))

1134

1659

attribute._dbus_annotations)

1135

1660

except AttributeError:

1136

1661

pass

1662

1137

1663

# Define a creator of a function to call both the

1138

1664

# original and alternate functions, so both the

1139

1665

# original and alternate signals gets sent when

1142

1668

"""This function is a scope container to pass

1143

1669

func1 and func2 to the "call_both" function

1144

1670

outside of its arguments"""

1145

1671

1672

@functools.wraps(func2)

1146

1673

def call_both(*args, **kwargs):

1147

1674

"""This function will emit two D-Bus

1148

1675

signals by calling func1 and func2"""

1149

1676

func1(*args, **kwargs)

1150

1677

func2(*args, **kwargs)

1151

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

1152

1684

return call_both

1153

1685

# Create the "call_both" function and add it to

1154

1686

# the class

1164

1696

alt_interface,

1165

1697

attribute._dbus_in_signature,

1166

1698

attribute._dbus_out_signature)

1167

(types.FunctionType(attribute.func_code,

1168

attribute.func_globals,

1169

attribute.func_name,

1170

attribute.func_defaults,

1171

attribute.func_closure)))

1699

(copy_function(attribute)))

1172

1700

# Copy annotations, if any

1173

1701

try:

1174

1702

attr[attrname]._dbus_annotations = dict(

1186

1714

attribute._dbus_access,

1187

1715

attribute._dbus_get_args_options

1188

1716

["byte_arrays"])

1189

(types.FunctionType(

1190

attribute.func_code,

1191

attribute.func_globals,

1192

attribute.func_name,

1193

attribute.func_defaults,

1194

attribute.func_closure)))

1717

(copy_function(attribute)))

1195

1718

# Copy annotations, if any

1196

1719

try:

1197

1720

attr[attrname]._dbus_annotations = dict(

1206

1729

# to the class.

1207

1730

attr[attrname] = (

1208

1731

dbus_interface_annotations(alt_interface)

1209

(types.FunctionType(attribute.func_code,

1210

attribute.func_globals,

1211

attribute.func_name,

1212

attribute.func_defaults,

1213

attribute.func_closure)))

1732

(copy_function(attribute)))

1214

1733

if deprecate:

1215

1734

# Deprecate all alternate interfaces

1216

iname="_AlternateDBusNames_interface_annotation{}"

1735

iname = "_AlternateDBusNames_interface_annotation{}"

1217

1736

for interface_name in interface_names:

1218

1737

1219

1738

@dbus_interface_annotations(interface_name)

1220

1739

def func(self):

1221

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

1222

"true" }

1740

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

1741

"true"}

1223

1742

# Find an unused name

1224

1743

for aname in (iname.format(i)

1225

1744

for i in itertools.count()):

1229

1748

if interface_names:

1230

1749

# Replace the class with a new subclass of it with

1231

1750

# methods, signals, etc. as created above.

1232

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

1233

(cls, ), attr)

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)

1234

1757

return cls

1235

1758

1236

1759

return wrapper

1237

1760

1238

1761

1240

1763

"se.bsnet.fukt.Mandos"})

1241

1764

class ClientDBus(Client, DBusObjectWithProperties):

1242

1765

"""A Client class using D-Bus

1243

1766

1244

1767

Attributes:

1245

1768

dbus_object_path: dbus.ObjectPath

1246

1769

bus: dbus.SystemBus()

1247

1770

"""

1248

1771

1249

1772

runtime_expansions = (Client.runtime_expansions

1250

1773

+ ("dbus_object_path", ))

1251

1774

1252

1775

_interface = "se.recompile.Mandos.Client"

1253

1776

1254

1777

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

1255

1256

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

1778

1779

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

1257

1780

self.bus = bus

1258

1781

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

1259

1782

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

1265

1788

"/clients/" + client_object_name)

1266

1789

DBusObjectWithProperties.__init__(self, self.bus,

1267

1790

self.dbus_object_path)

1268

1791

1269

1792

def notifychangeproperty(transform_func, dbus_name,

1270

1793

type_func=lambda x: x,

1271

1794

variant_level=1,

1273

1796

_interface=_interface):

1274

1797

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

1275

1798

its changes to DBus.

1276

1799

1277

1800

transform_fun: Function that takes a value and a variant_level

1278

1801

and transforms it to a D-Bus type.

1279

1802

dbus_name: D-Bus name of the variable

1282

1805

variant_level: D-Bus variant level. Default: 1

1283

1806

"""

1284

1807

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

1285

1808

1286

1809

def setter(self, value):

1287

1810

if hasattr(self, "dbus_object_path"):

1288

1811

if (not hasattr(self, attrname) or

1295

1818

else:

1296

1819

dbus_value = transform_func(

1297

1820

type_func(value),

1298

variant_level = variant_level)

1821

variant_level=variant_level)

1299

1822

self.PropertyChanged(dbus.String(dbus_name),

1300

1823

dbus_value)

1301

1824

self.PropertiesChanged(

1302

1825

_interface,

1303

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

1304

dbus_value }),

1826

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

1827

dbus_value}),

1305

1828

dbus.Array())

1306

1829

setattr(self, attrname, value)

1307

1830

1308

1831

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

1309

1832

1310

1833

expires = notifychangeproperty(datetime_to_dbus, "Expires")

1311

1834

approvals_pending = notifychangeproperty(dbus.Boolean,

1312

1835

"ApprovalPending",

1313

type_func = bool)

1836

type_func=bool)

1314

1837

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

1315

1838

last_enabled = notifychangeproperty(datetime_to_dbus,

1316

1839

"LastEnabled")

1317

1840

checker = notifychangeproperty(

1318

1841

dbus.Boolean, "CheckerRunning",

1319

type_func = lambda checker: checker is not None)

1842

type_func=lambda checker: checker is not None)

1320

1843

last_checked_ok = notifychangeproperty(datetime_to_dbus,

1321

1844

"LastCheckedOK")

1322

1845

last_checker_status = notifychangeproperty(dbus.Int16,

1327

1850

"ApprovedByDefault")

1328

1851

approval_delay = notifychangeproperty(

1329

1852

dbus.UInt64, "ApprovalDelay",

1330

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

1853

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

1331

1854

approval_duration = notifychangeproperty(

1332

1855

dbus.UInt64, "ApprovalDuration",

1333

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

1856

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

1334

1857

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

1335

1858

timeout = notifychangeproperty(

1336

1859

dbus.UInt64, "Timeout",

1337

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

1860

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

1338

1861

extended_timeout = notifychangeproperty(

1339

1862

dbus.UInt64, "ExtendedTimeout",

1340

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

1863

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

1341

1864

interval = notifychangeproperty(

1342

1865

dbus.UInt64, "Interval",

1343

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

1866

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

1344

1867

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

1345

1868

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

1346

1869

invalidate_only=True)

1347

1870

1348

1871

del notifychangeproperty

1349

1872

1350

1873

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

1351

1874

try:

1352

1875

self.remove_from_connection()

1355

1878

if hasattr(DBusObjectWithProperties, "__del__"):

1356

1879

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

1357

1880

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

1358

1881

1359

1882

def checker_callback(self, source, condition,

1360

1883

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

1361

1884

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

1365

1888

if exitstatus >= 0:

1366

1889

# Emit D-Bus signal

1367

1890

self.CheckerCompleted(dbus.Int16(exitstatus),

1368

dbus.Int64(0),

1891

# This is specific to GNU libC

1892

dbus.Int64(exitstatus << 8),

1369

1893

dbus.String(command))

1370

1894

else:

1371

1895

# Emit D-Bus signal

1372

1896

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

1373

1897

dbus.Int64(

1374

self.last_checker_signal),

1898

# This is specific to GNU libC

1899

(exitstatus << 8)

1900

| self.last_checker_signal),

1375

1901

dbus.String(command))

1376

1902

return ret

1377

1903

1378

1904

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

1379

1905

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

1380

1906

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

1384

1910

# Emit D-Bus signal

1385

1911

self.CheckerStarted(self.current_checker_command)

1386

1912

return r

1387

1913

1388

1914

def _reset_approved(self):

1389

1915

self.approved = None

1390

1916

return False

1391

1917

1392

1918

def approve(self, value=True):

1393

1919

self.approved = value

1394

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

1395

* 1000), self._reset_approved)

1920

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

1921

* 1000), self._reset_approved)

1396

1922

self.send_changedstate()

1397

1398

## D-Bus methods, signals & properties

1399

1400

## Interfaces

1401

1402

## Signals

1403

1923

1924

# D-Bus methods, signals & properties

1925

1926

# Interfaces

1927

1928

# Signals

1929

1404

1930

# CheckerCompleted - signal

1405

1931

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

1406

1932

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

1407

1933

"D-Bus signal"

1408

1934

pass

1409

1935

1410

1936

# CheckerStarted - signal

1411

1937

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

1412

1938

def CheckerStarted(self, command):

1413

1939

"D-Bus signal"

1414

1940

pass

1415

1941

1416

1942

# PropertyChanged - signal

1417

1943

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

1418

1944

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

1419

1945

def PropertyChanged(self, property, value):

1420

1946

"D-Bus signal"

1421

1947

pass

1422

1948

1423

1949

# GotSecret - signal

1424

1950

@dbus.service.signal(_interface)

1425

1951

def GotSecret(self):

1428

1954

server to mandos-client

1429

1955

"""

1430

1956

pass

1431

1957

1432

1958

# Rejected - signal

1433

1959

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

1434

1960

def Rejected(self, reason):

1435

1961

"D-Bus signal"

1436

1962

pass

1437

1963

1438

1964

# NeedApproval - signal

1439

1965

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

1440

1966

def NeedApproval(self, timeout, default):

1441

1967

"D-Bus signal"

1442

1968

return self.need_approval()

1443

1444

## Methods

1445

1969

1970

# Methods

1971

1446

1972

# Approve - method

1447

1973

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

1448

1974

def Approve(self, value):

1449

1975

self.approve(value)

1450

1976

1451

1977

# CheckedOK - method

1452

1978

@dbus.service.method(_interface)

1453

1979

def CheckedOK(self):

1454

1980

self.checked_ok()

1455

1981

1456

1982

# Enable - method

1983

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

1457

1984

@dbus.service.method(_interface)

1458

1985

def Enable(self):

1459

1986

"D-Bus method"

1460

1987

self.enable()

1461

1988

1462

1989

# StartChecker - method

1990

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

1463

1991

@dbus.service.method(_interface)

1464

1992

def StartChecker(self):

1465

1993

"D-Bus method"

1466

1994

self.start_checker()

1467

1995

1468

1996

# Disable - method

1997

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

1469

1998

@dbus.service.method(_interface)

1470

1999

def Disable(self):

1471

2000

"D-Bus method"

1472

2001

self.disable()

1473

2002

1474

2003

# StopChecker - method

2004

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

1475

2005

@dbus.service.method(_interface)

1476

2006

def StopChecker(self):

1477

2007

self.stop_checker()

1478

1479

## Properties

1480

2008

2009

# Properties

2010

1481

2011

# ApprovalPending - property

1482

2012

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

1483

2013

def ApprovalPending_dbus_property(self):

1484

2014

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

1485

2015

1486

2016

# ApprovedByDefault - property

1487

2017

@dbus_service_property(_interface,

1488

2018

signature="b",

1491

2021

if value is None: # get

1492

2022

return dbus.Boolean(self.approved_by_default)

1493

2023

self.approved_by_default = bool(value)

1494

2024

1495

2025

# ApprovalDelay - property

1496

2026

@dbus_service_property(_interface,

1497

2027

signature="t",

1501

2031

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

1502

2032

* 1000)

1503

2033

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

1504

2034

1505

2035

# ApprovalDuration - property

1506

2036

@dbus_service_property(_interface,

1507

2037

signature="t",

1511

2041

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

1512

2042

* 1000)

1513

2043

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

1514

2044

1515

2045

# Name - property

2046

@dbus_annotations(

2047

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

1516

2048

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

1517

2049

def Name_dbus_property(self):

1518

2050

return dbus.String(self.name)

1519

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

1520

2059

# Fingerprint - property

2060

@dbus_annotations(

2061

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

1521

2062

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

1522

2063

def Fingerprint_dbus_property(self):

1523

2064

return dbus.String(self.fingerprint)

1524

2065

1525

2066

# Host - property

1526

2067

@dbus_service_property(_interface,

1527

2068

signature="s",

1530

2071

if value is None: # get

1531

2072

return dbus.String(self.host)

1532

2073

self.host = str(value)

1533

2074

1534

2075

# Created - property

2076

@dbus_annotations(

2077

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

1535

2078

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

1536

2079

def Created_dbus_property(self):

1537

2080

return datetime_to_dbus(self.created)

1538

2081

1539

2082

# LastEnabled - property

1540

2083

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

1541

2084

def LastEnabled_dbus_property(self):

1542

2085

return datetime_to_dbus(self.last_enabled)

1543

2086

1544

2087

# Enabled - property

1545

2088

@dbus_service_property(_interface,

1546

2089

signature="b",

1552

2095

self.enable()

1553

2096

else:

1554

2097

self.disable()

1555

2098

1556

2099

# LastCheckedOK - property

1557

2100

@dbus_service_property(_interface,

1558

2101

signature="s",

1562

2105

self.checked_ok()

1563

2106

return

1564

2107

return datetime_to_dbus(self.last_checked_ok)

1565

2108

1566

2109

# LastCheckerStatus - property

1567

2110

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

1568

2111

def LastCheckerStatus_dbus_property(self):

1569

2112

return dbus.Int16(self.last_checker_status)

1570

2113

1571

2114

# Expires - property

1572

2115

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

1573

2116

def Expires_dbus_property(self):

1574

2117

return datetime_to_dbus(self.expires)

1575

2118

1576

2119

# LastApprovalRequest - property

1577

2120

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

1578

2121

def LastApprovalRequest_dbus_property(self):

1579

2122

return datetime_to_dbus(self.last_approval_request)

1580

2123

1581

2124

# Timeout - property

1582

2125

@dbus_service_property(_interface,

1583

2126

signature="t",

1598

2141

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

1599

2142

is None):

1600

2143

return

1601

gobject.source_remove(self.disable_initiator_tag)

1602

self.disable_initiator_tag = gobject.timeout_add(

2144

GLib.source_remove(self.disable_initiator_tag)

2145

self.disable_initiator_tag = GLib.timeout_add(

1603

2146

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

1604

2147

self.disable)

1605

2148

1606

2149

# ExtendedTimeout - property

1607

2150

@dbus_service_property(_interface,

1608

2151

signature="t",

1612

2155

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

1613

2156

* 1000)

1614

2157

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

1615

2158

1616

2159

# Interval - property

1617

2160

@dbus_service_property(_interface,

1618

2161

signature="t",

1625

2168

return

1626

2169

if self.enabled:

1627

2170

# Reschedule checker run

1628

gobject.source_remove(self.checker_initiator_tag)

1629

self.checker_initiator_tag = gobject.timeout_add(

2171

GLib.source_remove(self.checker_initiator_tag)

2172

self.checker_initiator_tag = GLib.timeout_add(

1630

2173

value, self.start_checker)

1631

self.start_checker() # Start one now, too

1632

2174

self.start_checker() # Start one now, too

2175

1633

2176

# Checker - property

1634

2177

@dbus_service_property(_interface,

1635

2178

signature="s",

1638

2181

if value is None: # get

1639

2182

return dbus.String(self.checker_command)

1640

2183

self.checker_command = str(value)

1641

2184

1642

2185

# CheckerRunning - property

1643

2186

@dbus_service_property(_interface,

1644

2187

signature="b",

1650

2193

self.start_checker()

1651

2194

else:

1652

2195

self.stop_checker()

1653

2196

1654

2197

# ObjectPath - property

2198

@dbus_annotations(

2199

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

2200

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

1655

2201

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

1656

2202

def ObjectPath_dbus_property(self):

1657

return self.dbus_object_path # is already a dbus.ObjectPath

1658

2203

return self.dbus_object_path # is already a dbus.ObjectPath

2204

1659

2205

# Secret = property

2206

@dbus_annotations(

2207

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

2208

"invalidates"})

1660

2209

@dbus_service_property(_interface,

1661

2210

signature="ay",

1662

2211

access="write",

1663

2212

byte_arrays=True)

1664

2213

def Secret_dbus_property(self, value):

1665

2214

self.secret = bytes(value)

1666

2215

1667

2216

del _interface

1668

2217

1669

2218

1670

class ProxyClient(object):

1671

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

2219

class ProxyClient:

2220

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

1672

2221

self._pipe = child_pipe

1673

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

2222

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

1674

2223

if not self._pipe.recv():

1675

raise KeyError(fpr)

1676

2224

raise KeyError(key_id or fpr)

2225

1677

2226

def __getattribute__(self, name):

1678

2227

if name == '_pipe':

1679

2228

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

1682

2231

if data[0] == 'data':

1683

2232

return data[1]

1684

2233

if data[0] == 'function':

1685

2234

1686

2235

def func(*args, **kwargs):

1687

2236

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

1688

2237

return self._pipe.recv()[1]

1689

2238

1690

2239

return func

1691

2240

1692

2241

def __setattr__(self, name, value):

1693

2242

if name == '_pipe':

1694

2243

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

1697

2246

1698

2247

class ClientHandler(socketserver.BaseRequestHandler, object):

1699

2248

"""A class to handle client connections.

1700

2249

1701

2250

Instantiated once for each connection to handle it.

1702

2251

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

1703

2252

1704

2253

def handle(self):

1705

2254

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

1706

2255

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

1707

2256

str(self.client_address))

1708

2257

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

1709

2258

self.server.child_pipe.fileno())

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"))

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"))

1723

2266

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

1724

2267

priority = self.server.gnutls_priority

1725

2268

if priority is None:

1726

2269

priority = "NORMAL"

1727

gnutls.library.functions.gnutls_priority_set_direct(

1728

session._c_object, priority, None)

1729

2270

gnutls.priority_set_direct(session._c_object,

2271

priority.encode("utf-8"),

2272

None)

2273

1730

2274

# Start communication using the Mandos protocol

1731

2275

# Get protocol number

1732

2276

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

1737

2281

except (ValueError, IndexError, RuntimeError) as error:

1738

2282

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

1739

2283

return

1740

2284

1741

2285

# Start GnuTLS connection

1742

2286

try:

1743

2287

session.handshake()

1744

except gnutls.errors.GNUTLSError as error:

2288

except gnutls.Error as error:

1745

2289

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

1746

2290

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

1747

2291

# established. Just abandon the request.

1748

2292

return

1749

2293

logger.debug("Handshake succeeded")

1750

2294

1751

2295

approval_required = False

1752

2296

try:

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,

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,

1764

2319

self.client_address)

1765

2320

except KeyError:

1766

2321

return

1767

2322

1768

2323

if client.approval_delay:

1769

2324

delay = client.approval_delay

1770

2325

client.approvals_pending += 1

1771

2326

approval_required = True

1772

2327

1773

2328

while True:

1774

2329

if not client.enabled:

1775

2330

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

1778

2333

# Emit D-Bus signal

1779

2334

client.Rejected("Disabled")

1780

2335

return

1781

2336

1782

2337

if client.approved or not client.approval_delay:

1783

#We are approved or approval is disabled

2338

# We are approved or approval is disabled

1784

2339

break

1785

2340

elif client.approved is None:

1786

2341

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

1797

2352

# Emit D-Bus signal

1798

2353

client.Rejected("Denied")

1799

2354

return

1800

1801

#wait until timeout or approved

2355

2356

# wait until timeout or approved

1802

2357

time = datetime.datetime.now()

1803

2358

client.changedstate.acquire()

1804

2359

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

1817

2372

break

1818

2373

else:

1819

2374

delay -= time2 - time

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

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

1834

2383

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

1835

2384

# bump the timeout using extended_timeout

1836

2385

client.bump_timeout(client.extended_timeout)

1837

2386

if self.server.use_dbus:

1838

2387

# Emit D-Bus signal

1839

2388

client.GotSecret()

1840

2389

1841

2390

finally:

1842

2391

if approval_required:

1843

2392

client.approvals_pending -= 1

1844

2393

try:

1845

2394

session.bye()

1846

except gnutls.errors.GNUTLSError as error:

2395

except gnutls.Error as error:

1847

2396

logger.warning("GnuTLS bye failed",

1848

2397

exc_info=error)

1849

2398

1850

2399

@staticmethod

1851

2400

def peer_certificate(session):

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

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""

1859

2417

list_size = ctypes.c_uint(1)

1860

cert_list = (gnutls.library.functions

1861

.gnutls_certificate_get_peers

2418

cert_list = (gnutls.certificate_get_peers

1862

2419

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

1863

2420

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

1864

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

1865

" certificate")

2421

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

1866

2422

if list_size.value == 0:

1867

2423

return None

1868

2424

cert = cert_list[0]

1869

2425

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

1870

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

1871

2461

@staticmethod

1872

2462

def fingerprint(openpgp):

1873

2463

"Convert an OpenPGP bytestring to a hexdigit fingerprint"

1874

2464

# New GnuTLS "datum" with the OpenPGP public key

1875

datum = gnutls.library.types.gnutls_datum_t(

2465

datum = gnutls.datum_t(

1876

2466

ctypes.cast(ctypes.c_char_p(openpgp),

1877

2467

ctypes.POINTER(ctypes.c_ubyte)),

1878

2468

ctypes.c_uint(len(openpgp)))

1879

2469

# New empty GnuTLS certificate

1880

crt = gnutls.library.types.gnutls_openpgp_crt_t()

1881

gnutls.library.functions.gnutls_openpgp_crt_init(

1882

ctypes.byref(crt))

2470

crt = gnutls.openpgp_crt_t()

2471

gnutls.openpgp_crt_init(ctypes.byref(crt))

1883

2472

# Import the OpenPGP public key into the certificate

1884

gnutls.library.functions.gnutls_openpgp_crt_import(

1885

crt, ctypes.byref(datum),

1886

gnutls.library.constants.GNUTLS_OPENPGP_FMT_RAW)

2473

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

2474

gnutls.OPENPGP_FMT_RAW)

1887

2475

# Verify the self signature in the key

1888

2476

crtverify = ctypes.c_uint()

1889

gnutls.library.functions.gnutls_openpgp_crt_verify_self(

1890

crt, 0, ctypes.byref(crtverify))

2477

gnutls.openpgp_crt_verify_self(crt, 0,

2478

ctypes.byref(crtverify))

1891

2479

if crtverify.value != 0:

1892

gnutls.library.functions.gnutls_openpgp_crt_deinit(crt)

1893

raise gnutls.errors.CertificateSecurityError(

1894

"Verify failed")

2480

gnutls.openpgp_crt_deinit(crt)

2481

raise gnutls.CertificateSecurityError(code

2482

=crtverify.value)

1895

2483

# New buffer for the fingerprint

1896

2484

buf = ctypes.create_string_buffer(20)

1897

2485

buf_len = ctypes.c_size_t()

1898

2486

# Get the fingerprint from the certificate into the buffer

1899

gnutls.library.functions.gnutls_openpgp_crt_get_fingerprint(

1900

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

2487

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

2488

ctypes.byref(buf_len))

1901

2489

# Deinit the certificate

1902

gnutls.library.functions.gnutls_openpgp_crt_deinit(crt)

2490

gnutls.openpgp_crt_deinit(crt)

1903

2491

# Convert the buffer to a Python bytestring

1904

2492

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

1905

2493

# Convert the bytestring to hexadecimal notation

1907

2495

return hex_fpr

1908

2496

1909

2497

1910

class MultiprocessingMixIn(object):

2498

class MultiprocessingMixIn:

1911

2499

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

1912

2500

1913

2501

def sub_process_main(self, request, address):

1914

2502

try:

1915

2503

self.finish_request(request, address)

1916

2504

except Exception:

1917

2505

self.handle_error(request, address)

1918

2506

self.close_request(request)

1919

2507

1920

2508

def process_request(self, request, address):

1921

2509

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

1922

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

1923

args = (request, address))

2510

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

2511

args=(request, address))

1924

2512

proc.start()

1925

2513

return proc

1926

2514

1927

2515

1928

class MultiprocessingMixInWithPipe(MultiprocessingMixIn, object):

2516

class MultiprocessingMixInWithPipe(MultiprocessingMixIn):

1929

2517

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

1930

2518

1931

2519

def process_request(self, request, client_address):

1932

2520

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

1933

2521

1934

2522

This function creates a new pipe in self.pipe

1935

2523

"""

1936

2524

parent_pipe, self.child_pipe = multiprocessing.Pipe()

1937

2525

1938

2526

proc = MultiprocessingMixIn.process_request(self, request,

1939

2527

client_address)

1940

2528

self.child_pipe.close()

1941

2529

self.add_pipe(parent_pipe, proc)

1942

2530

1943

2531

def add_pipe(self, parent_pipe, proc):

1944

2532

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

1945

2533

raise NotImplementedError()

1946

2534

1947

2535

1948

2536

class IPv6_TCPServer(MultiprocessingMixInWithPipe,

1949

socketserver.TCPServer, object):

2537

socketserver.TCPServer):

1950

2538

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

1951

2539

1952

2540

Attributes:

1953

2541

enabled: Boolean; whether this server is activated yet

1954

2542

interface: None or a network interface name (string)

1955

2543

use_ipv6: Boolean; to use IPv6 or not

1956

2544

"""

1957

2545

1958

2546

def __init__(self, server_address, RequestHandlerClass,

1959

2547

interface=None,

1960

2548

use_ipv6=True,

1970

2558

self.socketfd = socketfd

1971

2559

# Save the original socket.socket() function

1972

2560

self.socket_socket = socket.socket

2561

1973

2562

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

1974

#

2563

#

1975

2564

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

1976

2565

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

1977

2566

# patching socket.socket.)

1978

#

2567

#

1979

2568

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

1980

2569

@functools.wraps(socket.socket)

1981

2570

def socket_wrapper(*args, **kwargs):

1993

2582

# socket_wrapper(), if socketfd was set.

1994

2583

socketserver.TCPServer.__init__(self, server_address,

1995

2584

RequestHandlerClass)

1996

2585

1997

2586

def server_bind(self):

1998

2587

"""This overrides the normal server_bind() function

1999

2588

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

2000

2589

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

2590

global SO_BINDTODEVICE

2001

2591

if self.interface is not None:

2002

2592

if SO_BINDTODEVICE is None:

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

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

2024

2614

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

2025

2615

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

2616

if self.server_address[1]:

2617

self.allow_reuse_address = True

2026

2618

if not self.server_address[0]:

2027

2619

if self.address_family == socket.AF_INET6:

2028

any_address = "::" # in6addr_any

2620

any_address = "::" # in6addr_any

2029

2621

else:

2030

any_address = "0.0.0.0" # INADDR_ANY

2622

any_address = "0.0.0.0" # INADDR_ANY

2031

2623

self.server_address = (any_address,

2032

2624

self.server_address[1])

2033

2625

elif not self.server_address[1]:

2043

2635

2044

2636

class MandosServer(IPv6_TCPServer):

2045

2637

"""Mandos server.

2046

2638

2047

2639

Attributes:

2048

2640

clients: set of Client objects

2049

2641

gnutls_priority GnuTLS priority string

2050

2642

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

2051

2052

Assumes a gobject.MainLoop event loop.

2643

2644

Assumes a GLib.MainLoop event loop.

2053

2645

"""

2054

2646

2055

2647

def __init__(self, server_address, RequestHandlerClass,

2056

2648

interface=None,

2057

2649

use_ipv6=True,

2067

2659

self.gnutls_priority = gnutls_priority

2068

2660

IPv6_TCPServer.__init__(self, server_address,

2069

2661

RequestHandlerClass,

2070

interface = interface,

2071

use_ipv6 = use_ipv6,

2072

socketfd = socketfd)

2073

2662

interface=interface,

2663

use_ipv6=use_ipv6,

2664

socketfd=socketfd)

2665

2074

2666

def server_activate(self):

2075

2667

if self.enabled:

2076

2668

return socketserver.TCPServer.server_activate(self)

2077

2669

2078

2670

def enable(self):

2079

2671

self.enabled = True

2080

2672

2081

2673

def add_pipe(self, parent_pipe, proc):

2082

2674

# Call "handle_ipc" for both data and EOF events

2083

gobject.io_add_watch(

2675

GLib.io_add_watch(

2084

2676

parent_pipe.fileno(),

2085

gobject.IO_IN | gobject.IO_HUP,

2677

GLib.IO_IN | GLib.IO_HUP,

2086

2678

functools.partial(self.handle_ipc,

2087

parent_pipe = parent_pipe,

2088

proc = proc))

2089

2679

parent_pipe=parent_pipe,

2680

proc=proc))

2681

2090

2682

def handle_ipc(self, source, condition,

2091

2683

parent_pipe=None,

2092

proc = None,

2684

proc=None,

2093

2685

client_object=None):

2094

2686

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

2095

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

2687

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

2096

2688

# Wait for other process to exit

2097

2689

proc.join()

2098

2690

return False

2099

2691

2100

2692

# Read a request from the child

2101

2693

request = parent_pipe.recv()

2102

2694

command = request[0]

2103

2695

2104

2696

if command == 'init':

2105

fpr = request[1]

2106

address = request[2]

2107

2108

for c in self.clients.itervalues():

2109

if c.fingerprint == fpr:

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:

2110

2708

client = c

2111

2709

break

2112

2710

else:

2113

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

2114

"dress: %s", fpr, address)

2711

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

2712

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

2115

2713

if self.use_dbus:

2116

2714

# Emit D-Bus signal

2117

mandos_dbus_service.ClientNotFound(fpr,

2715

mandos_dbus_service.ClientNotFound(key_id or fpr,

2118

2716

address[0])

2119

2717

parent_pipe.send(False)

2120

2718

return False

2121

2122

gobject.io_add_watch(

2719

2720

GLib.io_add_watch(

2123

2721

parent_pipe.fileno(),

2124

gobject.IO_IN | gobject.IO_HUP,

2722

GLib.IO_IN | GLib.IO_HUP,

2125

2723

functools.partial(self.handle_ipc,

2126

parent_pipe = parent_pipe,

2127

proc = proc,

2128

client_object = client))

2724

parent_pipe=parent_pipe,

2725

proc=proc,

2726

client_object=client))

2129

2727

parent_pipe.send(True)

2130

2728

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

2131

2729

# same fileno

2134

2732

funcname = request[1]

2135

2733

args = request[2]

2136

2734

kwargs = request[3]

2137

2735

2138

2736

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

2139

2737

funcname)(*args,

2140

2738

**kwargs)))

2141

2739

2142

2740

if command == 'getattr':

2143

2741

attrname = request[1]

2144

2742

if isinstance(client_object.__getattribute__(attrname),

2147

2745

else:

2148

2746

parent_pipe.send((

2149

2747

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

2150

2748

2151

2749

if command == 'setattr':

2152

2750

attrname = request[1]

2153

2751

value = request[2]

2154

2752

setattr(client_object, attrname, value)

2155

2753

2156

2754

return True

2157

2755

2158

2756

2159

2757

def rfc3339_duration_to_delta(duration):

2160

2758

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

2161

2759

2162

2760

>>> rfc3339_duration_to_delta("P7D")

2163

2761

datetime.timedelta(7)

2164

2762

>>> rfc3339_duration_to_delta("PT60S")

2174

2772

>>> rfc3339_duration_to_delta("P1DT3M20S")

2175

2773

datetime.timedelta(1, 200)

2176

2774

"""

2177

2775

2178

2776

# Parsing an RFC 3339 duration with regular expressions is not

2179

2777

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

2180

2778

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

2181

2779

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

2182

2780

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

2183

2781

# avoid excessive use of external libraries.

2184

2782

2185

2783

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

2186

2784

Token = collections.namedtuple("Token", (

2187

2785

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

2220

2818

frozenset((token_year, token_month,

2221

2819

token_day, token_time,

2222

2820

token_week)))

2223

# Define starting values

2224

value = datetime.timedelta() # Value so far

2821

# Define starting values:

2822

# Value so far

2823

value = datetime.timedelta()

2225

2824

found_token = None

2226

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

2227

s = duration # String left to parse

2825

# Following valid tokens

2826

followers = frozenset((token_duration, ))

2827

# String left to parse

2828

s = duration

2228

2829

# Loop until end token is found

2229

2830

while found_token is not token_end:

2230

2831

# Search for any currently valid tokens

2254

2855

2255

2856

def string_to_delta(interval):

2256

2857

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

2257

2858

2258

2859

>>> string_to_delta('7d')

2259

2860

datetime.timedelta(7)

2260

2861

>>> string_to_delta('60s')

2268

2869

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

2269

2870

datetime.timedelta(0, 330)

2270

2871

"""

2271

2872

2272

2873

try:

2273

2874

return rfc3339_duration_to_delta(interval)

2274

2875

except ValueError:

2275

2876

pass

2276

2877

2277

2878

timevalue = datetime.timedelta(0)

2278

2879

for s in interval.split():

2279

2880

try:

2297

2898

return timevalue

2298

2899

2299

2900

2300

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

2901

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

2301

2902

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

2302

2903

2303

2904

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

2304

2905

if os.fork():

2305

2906

sys.exit()

2323

2924

2324

2925

2325

2926

def main():

2326

2927

2327

2928

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

2328

2929

# Parsing of options, both command line and config file

2329

2930

2330

2931

parser = argparse.ArgumentParser()

2331

2932

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

2332

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

2933

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

2333

2934

help="show version number and exit")

2334

2935

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

2335

2936

help="Bind to interface IF")

2371

2972

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

2372

2973

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

2373

2974

default=None)

2374

2975

2375

2976

options = parser.parse_args()

2376

2977

2377

2978

if options.check:

2378

2979

import doctest

2379

2980

fail_count, test_count = doctest.testmod()

2380

2981

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

2381

2982

2382

2983

# Default values for config file for server-global settings

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

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

2401

3007

# Parse config file for server-global settings

2402

server_config = configparser.SafeConfigParser(server_defaults)

3008

server_config = configparser.ConfigParser(server_defaults)

2403

3009

del server_defaults

2404

3010

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

2405

# Convert the SafeConfigParser object to a dict

3011

# Convert the ConfigParser object to a dict

2406

3012

server_settings = server_config.defaults()

2407

3013

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

2408

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

3014

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

3015

"foreground", "zeroconf"):

2409

3016

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

2410

3017

option)

2411

3018

if server_settings["port"]:

2421

3028

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

2422

3029

["socket"])

2423

3030

del server_config

2424

3031

2425

3032

# Override the settings from the config file with command line

2426

3033

# options, if set.

2427

3034

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

2445

3052

if server_settings["debug"]:

2446

3053

server_settings["foreground"] = True

2447

3054

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

2448

3055

2449

3056

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

2450

3057

2451

3058

if (not server_settings["zeroconf"]

2452

3059

and not (server_settings["port"]

2453

3060

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

2454

3061

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

2455

3062

2456

3063

# For convenience

2457

3064

debug = server_settings["debug"]

2458

3065

debuglevel = server_settings["debuglevel"]

2462

3069

stored_state_file)

2463

3070

foreground = server_settings["foreground"]

2464

3071

zeroconf = server_settings["zeroconf"]

2465

3072

2466

3073

if debug:

2467

3074

initlogger(debug, logging.DEBUG)

2468

3075

else:

2471

3078

else:

2472

3079

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

2473

3080

initlogger(debug, level)

2474

3081

2475

3082

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

2476

3083

syslogger.setFormatter(

2477

3084

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

2478

3085

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

2479

3086

server_settings["servicename"])))

2480

3087

2481

3088

# Parse config file with clients

2482

client_config = configparser.SafeConfigParser(Client

2483

.client_defaults)

3089

client_config = configparser.ConfigParser(Client.client_defaults)

2484

3090

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

2485

3091

"clients.conf"))

2486

3092

2487

3093

global mandos_dbus_service

2488

3094

mandos_dbus_service = None

2489

3095

2490

3096

socketfd = None

2491

3097

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

2492

3098

socketfd = server_settings["socket"]

2508

3114

except IOError as e:

2509

3115

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

2510

3116

exc_info=e)

2511

2512

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

3117

3118

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

3119

("mandos", "mandos"),

3120

("nobody", "nogroup")):

2513

3121

try:

2514

3122

uid = pwd.getpwnam(name).pw_uid

2515

gid = pwd.getpwnam(name).pw_gid

3123

gid = pwd.getpwnam(group).pw_gid

2516

3124

break

2517

3125

except KeyError:

2518

3126

continue

2522

3130

try:

2523

3131

os.setgid(gid)

2524

3132

os.setuid(uid)

3133

if debug:

3134

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

3135

gid))

2525

3136

except OSError as error:

3137

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

3138

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

2526

3139

if error.errno != errno.EPERM:

2527

3140

raise

2528

3141

2529

3142

if debug:

2530

3143

# Enable all possible GnuTLS debugging

2531

3144

2532

3145

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

2533

3146

# - GnuTLS manual

2534

gnutls.library.functions.gnutls_global_set_log_level(11)

2535

2536

@gnutls.library.types.gnutls_log_func

3147

gnutls.global_set_log_level(11)

3148

3149

@gnutls.log_func

2537

3150

def debug_gnutls(level, string):

2538

3151

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

2539

2540

gnutls.library.functions.gnutls_global_set_log_function(

2541

debug_gnutls)

2542

3152

3153

gnutls.global_set_log_function(debug_gnutls)

3154

2543

3155

# Redirect stdin so all checkers get /dev/null

2544

3156

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

2545

3157

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

2546

3158

if null > 2:

2547

3159

os.close(null)

2548

3160

2549

3161

# Need to fork before connecting to D-Bus

2550

3162

if not foreground:

2551

3163

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

2552

3164

daemon()

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

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

2558

3171

global main_loop

2559

3172

# From the Avahi example code

2560

3173

DBusGMainLoop(set_as_default=True)

2561

main_loop = gobject.MainLoop()

3174

main_loop = GLib.MainLoop()

2562

3175

bus = dbus.SystemBus()

2563

3176

# End of Avahi example code

2564

3177

if use_dbus:

2577

3190

if zeroconf:

2578

3191

protocol = avahi.PROTO_INET6 if use_ipv6 else avahi.PROTO_INET

2579

3192

service = AvahiServiceToSyslog(

2580

name = server_settings["servicename"],

2581

servicetype = "_mandos._tcp",

2582

protocol = protocol,

2583

bus = bus)

3193

name=server_settings["servicename"],

3194

servicetype="_mandos._tcp",

3195

protocol=protocol,

3196

bus=bus)

2584

3197

if server_settings["interface"]:

2585

3198

service.interface = if_nametoindex(

2586

3199

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

2587

3200

2588

3201

global multiprocessing_manager

2589

3202

multiprocessing_manager = multiprocessing.Manager()

2590

3203

2591

3204

client_class = Client

2592

3205

if use_dbus:

2593

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

2594

3206

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

3207

2595

3208

client_settings = Client.config_parser(client_config)

2596

3209

old_client_settings = {}

2597

3210

clients_data = {}

2598

3211

2599

3212

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

2600

3213

global wnull

2601

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

3214

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

2602

3215

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

2603

3216

# mode

2604

3217

if debug or not foreground:

2605

3218

wnull.close()

2606

3219

2607

3220

# Get client data and settings from last running state.

2608

3221

if server_settings["restore"]:

2609

3222

try:

2610

3223

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

2611

clients_data, old_client_settings = pickle.load(

2612

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"))

2613

3273

os.remove(stored_state_path)

2614

3274

except IOError as e:

2615

3275

if e.errno == errno.ENOENT:

2623

3283

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

2624

3284

"EOFError:",

2625

3285

exc_info=e)

2626

3286

2627

3287

with PGPEngine() as pgp:

2628

3288

for client_name, client in clients_data.items():

2629

3289

# Skip removed clients

2630

3290

if client_name not in client_settings:

2631

3291

continue

2632

3292

2633

3293

# Decide which value to use after restoring saved state.

2634

3294

# We have three different values: Old config file,

2635

3295

# new config file, and saved state.

2646

3306

client[name] = value

2647

3307

except KeyError:

2648

3308

pass

2649

3309

2650

3310

# Clients who has passed its expire date can still be

2651

3311

# enabled if its last checker was successful. A Client

2652

3312

# whose checker succeeded before we stored its state is

2685

3345

client_name))

2686

3346

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

2687

3347

["secret"])

2688

3348

2689

3349

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

2690

3350

for client_name in (set(old_client_settings)

2691

3351

- set(client_settings)):

2693

3353

for client_name in (set(client_settings)

2694

3354

- set(old_client_settings)):

2695

3355

clients_data[client_name] = client_settings[client_name]

2696

3356

2697

3357

# Create all client objects

2698

3358

for client_name, client in clients_data.items():

2699

3359

tcp_server.clients[client_name] = client_class(

2700

name = client_name,

2701

settings = client,

2702

server_settings = server_settings)

2703

3360

name=client_name,

3361

settings=client,

3362

server_settings=server_settings)

3363

2704

3364

if not tcp_server.clients:

2705

3365

logger.warning("No clients defined")

2706

3366

2707

3367

if not foreground:

2708

3368

if pidfile is not None:

2709

3369

pid = os.getpid()

2715

3375

pidfilename, pid)

2716

3376

del pidfile

2717

3377

del pidfilename

2718

2719

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

2720

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

2721

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

2722

3383

if use_dbus:

2723

3384

2724

3385

@alternate_dbus_interfaces(

2725

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

2726

class MandosDBusService(DBusObjectWithProperties):

3386

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

3387

class MandosDBusService(DBusObjectWithObjectManager):

2727

3388

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

2728

3389

2729

3390

def __init__(self):

2730

3391

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

2731

3392

2732

3393

_interface = "se.recompile.Mandos"

2733

2734

@dbus_interface_annotations(_interface)

2735

def _foo(self):

2736

return {

2737

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

2738

"false" }

2739

3394

2740

3395

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

2741

3396

def ClientAdded(self, objpath):

2742

3397

"D-Bus signal"

2743

3398

pass

2744

3399

2745

3400

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

2746

def ClientNotFound(self, fingerprint, address):

3401

def ClientNotFound(self, key_id, address):

2747

3402

"D-Bus signal"

2748

3403

pass

2749

3404

3405

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

3406

"true"})

2750

3407

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

2751

3408

def ClientRemoved(self, objpath, name):

2752

3409

"D-Bus signal"

2753

3410

pass

2754

3411

3412

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

3413

"true"})

2755

3414

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

2756

3415

def GetAllClients(self):

2757

3416

"D-Bus method"

2758

3417

return dbus.Array(c.dbus_object_path for c in

2759

tcp_server.clients.itervalues())

2760

3418

tcp_server.clients.values())

3419

3420

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

3421

"true"})

2761

3422

@dbus.service.method(_interface,

2762

3423

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

2763

3424

def GetAllClientsWithProperties(self):

2764

3425

"D-Bus method"

2765

3426

return dbus.Dictionary(

2766

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

2767

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

3427

{c.dbus_object_path: c.GetAll(

3428

"se.recompile.Mandos.Client")

3429

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

2768

3430

signature="oa{sv}")

2769

3431

2770

3432

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

2771

3433

def RemoveClient(self, object_path):

2772

3434

"D-Bus method"

2773

for c in tcp_server.clients.itervalues():

3435

for c in tcp_server.clients.values():

2774

3436

if c.dbus_object_path == object_path:

2775

3437

del tcp_server.clients[c.name]

2776

3438

c.remove_from_connection()

2777

# Don't signal anything except ClientRemoved

3439

# Don't signal the disabling

2778

3440

c.disable(quiet=True)

2779

# Emit D-Bus signal

2780

self.ClientRemoved(object_path, c.name)

3441

# Emit D-Bus signal for removal

3442

self.client_removed_signal(c)

2781

3443

return

2782

3444

raise KeyError(object_path)

2783

3445

2784

3446

del _interface

2785

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

2786

3484

mandos_dbus_service = MandosDBusService()

2787

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

2788

3491

def cleanup():

2789

3492

"Cleanup function; run on exit"

2790

3493

if zeroconf:

2791

3494

service.cleanup()

2792

2793

multiprocessing.active_children()

2794

wnull.close()

3495

3496

mp.active_children()

3497

wn.close()

2795

3498

if not (tcp_server.clients or client_settings):

2796

3499

return

2797

3500

2798

3501

# Store client before exiting. Secrets are encrypted with key

2799

3502

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

2800

3503

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

2801

3504

clients = {}

2802

3505

with PGPEngine() as pgp:

2803

for client in tcp_server.clients.itervalues():

3506

for client in tcp_server.clients.values():

2804

3507

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

2805

3508

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

2806

3509

key)

2807

3510

client_dict = {}

2808

3511

2809

3512

# A list of attributes that can not be pickled

2810

3513

# + secret.

2811

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

2812

"checker", "server_settings" }

3514

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

3515

"checker", "server_settings"}

2813

3516

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

2814

3517

.Object):

2815

3518

exclude.add(name)

2816

3519

2817

3520

client_dict["encrypted_secret"] = (client

2818

3521

.encrypted_secret)

2819

3522

for attr in client.client_structure:

2820

3523

if attr not in exclude:

2821

3524

client_dict[attr] = getattr(client, attr)

2822

3525

2823

3526

clients[client.name] = client_dict

2824

3527

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

2825

3528

2826

3529

try:

2827

3530

with tempfile.NamedTemporaryFile(

2828

3531

mode='wb',

2830

3533

prefix='clients-',

2831

3534

dir=os.path.dirname(stored_state_path),

2832

3535

delete=False) as stored_state:

2833

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

3536

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

3537

protocol=2)

2834

3538

tempname = stored_state.name

2835

3539

os.rename(tempname, stored_state_path)

2836

3540

except (IOError, OSError) as e:

2846

3550

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

2847

3551

exc_info=e)

2848

3552

raise

2849

3553

2850

3554

# Delete all clients, and settings from config

2851

3555

while tcp_server.clients:

2852

3556

name, client = tcp_server.clients.popitem()

2853

3557

if use_dbus:

2854

3558

client.remove_from_connection()

2855

# Don't signal anything except ClientRemoved

3559

# Don't signal the disabling

2856

3560

client.disable(quiet=True)

3561

# Emit D-Bus signal for removal

2857

3562

if use_dbus:

2858

# Emit D-Bus signal

2859

mandos_dbus_service.ClientRemoved(

2860

client.dbus_object_path, client.name)

3563

mandos_dbus_service.client_removed_signal(client)

2861

3564

client_settings.clear()

2862

3565

2863

3566

atexit.register(cleanup)

2864

2865

for client in tcp_server.clients.itervalues():

3567

3568

for client in tcp_server.clients.values():

2866

3569

if use_dbus:

2867

# Emit D-Bus signal

2868

mandos_dbus_service.ClientAdded(client.dbus_object_path)

3570

# Emit D-Bus signal for adding

3571

mandos_dbus_service.client_added_signal(client)

2869

3572

# Need to initiate checking of clients

2870

3573

if client.enabled:

2871

3574

client.init_checker()

2872

3575

2873

3576

tcp_server.enable()

2874

3577

tcp_server.server_activate()

2875

3578

2876

3579

# Find out what port we got

2877

3580

if zeroconf:

2878

3581

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

2883

3586

else: # IPv4

2884

3587

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

2885

3588

*tcp_server.socket.getsockname())

2886

2887

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

2888

3589

3590

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

3591

2889

3592

try:

2890

3593

if zeroconf:

2891

3594

# From the Avahi example code

2896

3599

cleanup()

2897

3600

sys.exit(1)

2898

3601

# End of Avahi example code

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

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

2905

3608

logger.debug("Starting main loop")

2906

3609

main_loop.run()

2907

3610

except AvahiError as error: