/mandos/release : revision 237.7.471

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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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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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# 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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version = "1.7.16"

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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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class PGPEngine(object):

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"""A simple class for OpenPGP symmetric encryption & decryption"""

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def __init__(self):

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self.tempdir = tempfile.mkdtemp(prefix="mandos-")

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self.gpg = "gpg"

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try:

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

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for line in output.splitlines():

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

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if name == "gpg":

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self.gpg = path

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break

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except OSError as e:

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if e.errno != errno.ENOENT:

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raise

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self.gnupgargs = ['--batch',

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'--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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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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passfile.write(passphrase)

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passfile.flush()

206

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,

210

stdin = subprocess.PIPE,

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stdout = subprocess.PIPE,

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stderr = subprocess.PIPE)

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

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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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254

if proc.returncode != 0:

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raise PGPError(err)

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return ciphertext

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257

218

258

def decrypt(self, data, password):

219

259

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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263

passfile.flush()

224

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]

227

267

+ self.gnupgargs,

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stdin = subprocess.PIPE,

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stdout = subprocess.PIPE,

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stderr = subprocess.PIPE)

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

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stdin=subprocess.PIPE,

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stdout=subprocess.PIPE,

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stderr=subprocess.PIPE)

271

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

235

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# Pretend that we have an Avahi module

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class Avahi(object):

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

280

It is instantiated once, and simulates having an Avahi module."""

281

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

285

DBUS_NAME = "org.freedesktop.Avahi"

286

DBUS_INTERFACE_ENTRY_GROUP = DBUS_NAME + ".EntryGroup"

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DBUS_INTERFACE_SERVER = DBUS_NAME + ".Server"

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DBUS_PATH_SERVER = "/"

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290

def string_array_to_txt_array(self, t):

291

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

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

293

ENTRY_GROUP_ESTABLISHED = 2 # avahi-common/defs.h

294

ENTRY_GROUP_COLLISION = 3 # avahi-common/defs.h

295

ENTRY_GROUP_FAILURE = 4 # avahi-common/defs.h

296

SERVER_INVALID = 0 # avahi-common/defs.h

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SERVER_REGISTERING = 1 # avahi-common/defs.h

298

SERVER_RUNNING = 2 # avahi-common/defs.h

299

SERVER_COLLISION = 3 # avahi-common/defs.h

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SERVER_FAILURE = 4 # avahi-common/defs.h

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avahi = Avahi()

302

303

237

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class AvahiError(Exception):

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305

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

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self.value = value

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318

252

319

class AvahiService(object):

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320

"""An Avahi (Zeroconf) service.

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321

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322

Attributes:

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323

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

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Used to optionally bind to the specified interface.

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server: D-Bus Server

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bus: dbus.SystemBus()

271

338

"""

272

339

273

340

def __init__(self,

274

interface = avahi.IF_UNSPEC,

275

name = None,

276

servicetype = None,

277

port = None,

278

TXT = None,

279

domain = "",

280

host = "",

281

max_renames = 32768,

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protocol = avahi.PROTO_UNSPEC,

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bus = None):

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interface=avahi.IF_UNSPEC,

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name=None,

343

servicetype=None,

344

port=None,

345

TXT=None,

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domain="",

347

host="",

348

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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352

self.name = name

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self.type = servicetype

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self.server = None

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self.bus = bus

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self.entry_group_state_changed_match = None

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def rename(self, remove=True):

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

301

368

if self.rename_count >= self.max_renames:

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

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self.cleanup()

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os._exit(1)

324

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325

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def remove(self):

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

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if self.entry_group_state_changed_match is not None:

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self.entry_group_state_changed_match = None

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if self.group is not None:

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self.group.Reset()

332

399

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def add(self):

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

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self.remove()

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419

dbus.UInt16(self.port),

353

420

avahi.string_array_to_txt_array(self.TXT))

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self.group.Commit()

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422

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def entry_group_state_changed(self, state, error):

357

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

358

425

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

359

426

360

427

if state == avahi.ENTRY_GROUP_ESTABLISHED:

361

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logger.debug("Zeroconf service established.")

362

429

elif state == avahi.ENTRY_GROUP_COLLISION:

366

433

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

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434

str(error))

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

369

436

370

437

def cleanup(self):

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

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if self.group is not None:

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pass

378

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self.group = None

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self.remove()

380

447

381

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

382

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

383

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

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

413

480

else:

414

481

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

415

482

416

483

def activate(self):

417

484

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

418

485

if self.server is None:

429

496

class AvahiServiceToSyslog(AvahiService):

430

497

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

431

498

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

432

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

499

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

500

**kwargs)

433

501

syslogger.setFormatter(logging.Formatter(

434

502

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

435

503

.format(self.name)))

436

504

return ret

437

505

506

507

# Pretend that we have a GnuTLS module

508

class GnuTLS(object):

509

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

510

It is instantiated once, and simulates having a GnuTLS module."""

511

512

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

513

if library is None:

514

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

515

_library = ctypes.cdll.LoadLibrary(library)

516

del library

517

_need_version = b"3.3.0"

518

519

def __init__(self):

520

# Need to use "self" here, since this method is called before

521

# the assignment to the "gnutls" global variable happens.

522

if self.check_version(self._need_version) is None:

523

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

524

.format(self._need_version))

525

526

# Unless otherwise indicated, the constants and types below are

527

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

528

529

# Constants

530

E_SUCCESS = 0

531

E_INTERRUPTED = -52

532

E_AGAIN = -28

533

CRT_OPENPGP = 2

534

CLIENT = 2

535

SHUT_RDWR = 0

536

CRD_CERTIFICATE = 1

537

E_NO_CERTIFICATE_FOUND = -49

538

OPENPGP_FMT_RAW = 0 # gnutls/openpgp.h

539

540

# Types

541

class session_int(ctypes.Structure):

542

_fields_ = []

543

session_t = ctypes.POINTER(session_int)

544

545

class certificate_credentials_st(ctypes.Structure):

546

_fields_ = []

547

certificate_credentials_t = ctypes.POINTER(

548

certificate_credentials_st)

549

certificate_type_t = ctypes.c_int

550

551

class datum_t(ctypes.Structure):

552

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

553

('size', ctypes.c_uint)]

554

555

class openpgp_crt_int(ctypes.Structure):

556

_fields_ = []

557

openpgp_crt_t = ctypes.POINTER(openpgp_crt_int)

558

openpgp_crt_fmt_t = ctypes.c_int # gnutls/openpgp.h

559

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

560

credentials_type_t = ctypes.c_int

561

transport_ptr_t = ctypes.c_void_p

562

close_request_t = ctypes.c_int

563

564

# Exceptions

565

class Error(Exception):

566

# We need to use the class name "GnuTLS" here, since this

567

# exception might be raised from within GnuTLS.__init__,

568

# which is called before the assignment to the "gnutls"

569

# global variable has happened.

570

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

571

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

572

# code is passed, convert it to a string with

573

# gnutls.strerror()

574

self.code = code

575

if message is None and code is not None:

576

message = GnuTLS.strerror(code)

577

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

578

message, *args)

579

580

class CertificateSecurityError(Error):

581

pass

582

583

# Classes

584

class Credentials(object):

585

def __init__(self):

586

self._c_object = gnutls.certificate_credentials_t()

587

gnutls.certificate_allocate_credentials(

588

ctypes.byref(self._c_object))

589

self.type = gnutls.CRD_CERTIFICATE

590

591

def __del__(self):

592

gnutls.certificate_free_credentials(self._c_object)

593

594

class ClientSession(object):

595

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

596

self._c_object = gnutls.session_t()

597

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

598

gnutls.set_default_priority(self._c_object)

599

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

600

gnutls.handshake_set_private_extensions(self._c_object,

601

True)

602

self.socket = socket

603

if credentials is None:

604

credentials = gnutls.Credentials()

605

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

606

ctypes.cast(credentials._c_object,

607

ctypes.c_void_p))

608

self.credentials = credentials

609

610

def __del__(self):

611

gnutls.deinit(self._c_object)

612

613

def handshake(self):

614

return gnutls.handshake(self._c_object)

615

616

def send(self, data):

617

data = bytes(data)

618

data_len = len(data)

619

while data_len > 0:

620

data_len -= gnutls.record_send(self._c_object,

621

data[-data_len:],

622

data_len)

623

624

def bye(self):

625

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

626

627

# Error handling functions

628

def _error_code(result):

629

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

630

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

631

if result >= 0:

632

return result

633

if result == gnutls.E_NO_CERTIFICATE_FOUND:

634

raise gnutls.CertificateSecurityError(code=result)

635

raise gnutls.Error(code=result)

636

637

def _retry_on_error(result, func, arguments):

638

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

639

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

640

while result < 0:

641

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

642

return _error_code(result)

643

result = func(*arguments)

644

return result

645

646

# Unless otherwise indicated, the function declarations below are

647

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

648

649

# Functions

650

priority_set_direct = _library.gnutls_priority_set_direct

651

priority_set_direct.argtypes = [session_t, ctypes.c_char_p,

652

ctypes.POINTER(ctypes.c_char_p)]

653

priority_set_direct.restype = _error_code

654

655

init = _library.gnutls_init

656

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

657

init.restype = _error_code

658

659

set_default_priority = _library.gnutls_set_default_priority

660

set_default_priority.argtypes = [session_t]

661

set_default_priority.restype = _error_code

662

663

record_send = _library.gnutls_record_send

664

record_send.argtypes = [session_t, ctypes.c_void_p,

665

ctypes.c_size_t]

666

record_send.restype = ctypes.c_ssize_t

667

record_send.errcheck = _retry_on_error

668

669

certificate_allocate_credentials = (

670

_library.gnutls_certificate_allocate_credentials)

671

certificate_allocate_credentials.argtypes = [

672

ctypes.POINTER(certificate_credentials_t)]

673

certificate_allocate_credentials.restype = _error_code

674

675

certificate_free_credentials = (

676

_library.gnutls_certificate_free_credentials)

677

certificate_free_credentials.argtypes = [

678

certificate_credentials_t]

679

certificate_free_credentials.restype = None

680

681

handshake_set_private_extensions = (

682

_library.gnutls_handshake_set_private_extensions)

683

handshake_set_private_extensions.argtypes = [session_t,

684

ctypes.c_int]

685

handshake_set_private_extensions.restype = None

686

687

credentials_set = _library.gnutls_credentials_set

688

credentials_set.argtypes = [session_t, credentials_type_t,

689

ctypes.c_void_p]

690

credentials_set.restype = _error_code

691

692

strerror = _library.gnutls_strerror

693

strerror.argtypes = [ctypes.c_int]

694

strerror.restype = ctypes.c_char_p

695

696

certificate_type_get = _library.gnutls_certificate_type_get

697

certificate_type_get.argtypes = [session_t]

698

certificate_type_get.restype = _error_code

699

700

certificate_get_peers = _library.gnutls_certificate_get_peers

701

certificate_get_peers.argtypes = [session_t,

702

ctypes.POINTER(ctypes.c_uint)]

703

certificate_get_peers.restype = ctypes.POINTER(datum_t)

704

705

global_set_log_level = _library.gnutls_global_set_log_level

706

global_set_log_level.argtypes = [ctypes.c_int]

707

global_set_log_level.restype = None

708

709

global_set_log_function = _library.gnutls_global_set_log_function

710

global_set_log_function.argtypes = [log_func]

711

global_set_log_function.restype = None

712

713

deinit = _library.gnutls_deinit

714

deinit.argtypes = [session_t]

715

deinit.restype = None

716

717

handshake = _library.gnutls_handshake

718

handshake.argtypes = [session_t]

719

handshake.restype = _error_code

720

handshake.errcheck = _retry_on_error

721

722

transport_set_ptr = _library.gnutls_transport_set_ptr

723

transport_set_ptr.argtypes = [session_t, transport_ptr_t]

724

transport_set_ptr.restype = None

725

726

bye = _library.gnutls_bye

727

bye.argtypes = [session_t, close_request_t]

728

bye.restype = _error_code

729

bye.errcheck = _retry_on_error

730

731

check_version = _library.gnutls_check_version

732

check_version.argtypes = [ctypes.c_char_p]

733

check_version.restype = ctypes.c_char_p

734

735

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

736

737

openpgp_crt_init = _library.gnutls_openpgp_crt_init

738

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

739

openpgp_crt_init.restype = _error_code

740

741

openpgp_crt_import = _library.gnutls_openpgp_crt_import

742

openpgp_crt_import.argtypes = [openpgp_crt_t,

743

ctypes.POINTER(datum_t),

744

openpgp_crt_fmt_t]

745

openpgp_crt_import.restype = _error_code

746

747

openpgp_crt_verify_self = _library.gnutls_openpgp_crt_verify_self

748

openpgp_crt_verify_self.argtypes = [openpgp_crt_t, ctypes.c_uint,

749

ctypes.POINTER(ctypes.c_uint)]

750

openpgp_crt_verify_self.restype = _error_code

751

752

openpgp_crt_deinit = _library.gnutls_openpgp_crt_deinit

753

openpgp_crt_deinit.argtypes = [openpgp_crt_t]

754

openpgp_crt_deinit.restype = None

755

756

openpgp_crt_get_fingerprint = (

757

_library.gnutls_openpgp_crt_get_fingerprint)

758

openpgp_crt_get_fingerprint.argtypes = [openpgp_crt_t,

759

ctypes.c_void_p,

760

ctypes.POINTER(

761

ctypes.c_size_t)]

762

openpgp_crt_get_fingerprint.restype = _error_code

763

764

# Remove non-public functions

765

del _error_code, _retry_on_error

766

# Create the global "gnutls" object, simulating a module

767

gnutls = GnuTLS()

768

769

438

770

def call_pipe(connection, # : multiprocessing.Connection

439

771

func, *args, **kwargs):

440

772

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

441

773

442

774

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

443

775

return value on the provided multiprocessing.Connection.

444

776

"""

445

777

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

446

778

connection.close()

447

779

780

448

781

class Client(object):

449

782

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

450

783

451

784

Attributes:

452

785

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

453

786

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

455

788

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

456

789

to see if the client lives.

457

790

'None' if no process is running.

458

checker_callback_tag: a gobject event source tag, or None

791

checker_callback_tag: a GLib event source tag, or None

459

792

checker_command: string; External command which is run to check

460

793

if client lives. %() expansions are done at

461

794

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

462

795

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

463

checker_initiator_tag: a gobject event source tag, or None

796

checker_initiator_tag: a GLib event source tag, or None

464

797

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

465

798

client_structure: Object describing what attributes a client has

466

799

and is used for storing the client at exit

467

800

current_checker_command: string; current running checker_command

468

disable_initiator_tag: a gobject event source tag, or None

801

disable_initiator_tag: a GLib event source tag, or None

469

802

enabled: bool()

470

803

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

471

804

uniquely identify the client

490

823

disabled, or None

491

824

server_settings: The server_settings dict from main()

492

825

"""

493

826

494

827

runtime_expansions = ("approval_delay", "approval_duration",

495

828

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

496

829

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

507

840

"approved_by_default": "True",

508

841

"enabled": "True",

509

842

}

510

843

511

844

@staticmethod

512

845

def config_parser(config):

513

846

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

520

853

for client_name in config.sections():

521

854

section = dict(config.items(client_name))

522

855

client = settings[client_name] = {}

523

856

524

857

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

525

858

# Reformat values from string types to Python types

526

859

client["approved_by_default"] = config.getboolean(

527

860

client_name, "approved_by_default")

528

861

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

529

862

"enabled")

530

863

531

864

# Uppercase and remove spaces from fingerprint for later

532

865

# comparison purposes with return value from the

533

866

# fingerprint() function

534

867

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

535

868

.replace(" ", ""))

536

869

if "secret" in section:

537

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

870

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

871

.encode("utf-8"),

872

"base64")

538

873

elif "secfile" in section:

539

874

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

540

875

(section["secfile"])),

555

890

client["last_approval_request"] = None

556

891

client["last_checked_ok"] = None

557

892

client["last_checker_status"] = -2

558

893

559

894

return settings

560

561

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

895

896

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

562

897

self.name = name

563

898

if server_settings is None:

564

899

server_settings = {}

566

901

# adding all client settings

567

902

for setting, value in settings.items():

568

903

setattr(self, setting, value)

569

904

570

905

if self.enabled:

571

906

if not hasattr(self, "last_enabled"):

572

907

self.last_enabled = datetime.datetime.utcnow()

576

911

else:

577

912

self.last_enabled = None

578

913

self.expires = None

579

914

580

915

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

581

916

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

582

917

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

583

918

datetime.datetime.utcnow())

584

919

585

920

# attributes specific for this server instance

586

921

self.checker = None

587

922

self.checker_initiator_tag = None

593

928

self.changedstate = multiprocessing_manager.Condition(

594

929

multiprocessing_manager.Lock())

595

930

self.client_structure = [attr

596

for attr in self.__dict__.iterkeys()

931

for attr in self.__dict__.keys()

597

932

if not attr.startswith("_")]

598

933

self.client_structure.append("client_structure")

599

934

600

935

for name, t in inspect.getmembers(

601

936

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

602

937

if not name.startswith("_"):

603

938

self.client_structure.append(name)

604

939

605

940

# Send notice to process children that client state has changed

606

941

def send_changedstate(self):

607

942

with self.changedstate:

608

943

self.changedstate.notify_all()

609

944

610

945

def enable(self):

611

946

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

612

947

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

617

952

self.last_enabled = datetime.datetime.utcnow()

618

953

self.init_checker()

619

954

self.send_changedstate()

620

955

621

956

def disable(self, quiet=True):

622

957

"""Disable this client."""

623

958

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

625

960

if not quiet:

626

961

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

627

962

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

628

gobject.source_remove(self.disable_initiator_tag)

963

GLib.source_remove(self.disable_initiator_tag)

629

964

self.disable_initiator_tag = None

630

965

self.expires = None

631

966

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

632

gobject.source_remove(self.checker_initiator_tag)

967

GLib.source_remove(self.checker_initiator_tag)

633

968

self.checker_initiator_tag = None

634

969

self.stop_checker()

635

970

self.enabled = False

636

971

if not quiet:

637

972

self.send_changedstate()

638

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

973

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

639

974

return False

640

975

641

976

def __del__(self):

642

977

self.disable()

643

978

644

979

def init_checker(self):

645

980

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

646

981

# and every interval from then on.

647

982

if self.checker_initiator_tag is not None:

648

gobject.source_remove(self.checker_initiator_tag)

649

self.checker_initiator_tag = gobject.timeout_add(

983

GLib.source_remove(self.checker_initiator_tag)

984

self.checker_initiator_tag = GLib.timeout_add(

650

985

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

651

986

self.start_checker)

652

987

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

653

988

if self.disable_initiator_tag is not None:

654

gobject.source_remove(self.disable_initiator_tag)

655

self.disable_initiator_tag = gobject.timeout_add(

989

GLib.source_remove(self.disable_initiator_tag)

990

self.disable_initiator_tag = GLib.timeout_add(

656

991

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

657

992

# Also start a new checker *right now*.

658

993

self.start_checker()

659

994

660

995

def checker_callback(self, source, condition, connection,

661

996

command):

662

997

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

665

1000

# Read return code from connection (see call_pipe)

666

1001

returncode = connection.recv()

667

1002

connection.close()

668

1003

669

1004

if returncode >= 0:

670

1005

self.last_checker_status = returncode

671

1006

self.last_checker_signal = None

681

1016

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

682

1017

vars(self))

683

1018

return False

684

1019

685

1020

def checked_ok(self):

686

1021

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

687

1022

self.last_checked_ok = datetime.datetime.utcnow()

688

1023

self.last_checker_status = 0

689

1024

self.last_checker_signal = None

690

1025

self.bump_timeout()

691

1026

692

1027

def bump_timeout(self, timeout=None):

693

1028

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

694

1029

if timeout is None:

695

1030

timeout = self.timeout

696

1031

if self.disable_initiator_tag is not None:

697

gobject.source_remove(self.disable_initiator_tag)

1032

GLib.source_remove(self.disable_initiator_tag)

698

1033

self.disable_initiator_tag = None

699

1034

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

700

self.disable_initiator_tag = gobject.timeout_add(

1035

self.disable_initiator_tag = GLib.timeout_add(

701

1036

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

702

1037

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

703

1038

704

1039

def need_approval(self):

705

1040

self.last_approval_request = datetime.datetime.utcnow()

706

1041

707

1042

def start_checker(self):

708

1043

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

709

1044

710

1045

If a checker already exists, leave it running and do

711

1046

nothing."""

712

1047

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

717

1052

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

718

1053

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

719

1054

# should be.

720

1055

721

1056

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

722

1057

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

723

1058

self.checker.join()

727

1062

# Escape attributes for the shell

728

1063

escaped_attrs = {

729

1064

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

730

for attr in self.runtime_expansions }

1065

for attr in self.runtime_expansions}

731

1066

try:

732

1067

command = self.checker_command % escaped_attrs

733

1068

except TypeError as error:

745

1080

# The exception is when not debugging but nevertheless

746

1081

# running in the foreground; use the previously

747

1082

# created wnull.

748

popen_args = { "close_fds": True,

749

"shell": True,

750

"cwd": "/" }

1083

popen_args = {"close_fds": True,

1084

"shell": True,

1085

"cwd": "/"}

751

1086

if (not self.server_settings["debug"]

752

1087

and self.server_settings["foreground"]):

753

1088

popen_args.update({"stdout": wnull,

754

"stderr": wnull })

755

pipe = multiprocessing.Pipe(duplex = False)

1089

"stderr": wnull})

1090

pipe = multiprocessing.Pipe(duplex=False)

756

1091

self.checker = multiprocessing.Process(

757

target = call_pipe,

758

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

759

kwargs = popen_args)

1092

target=call_pipe,

1093

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

1094

kwargs=popen_args)

760

1095

self.checker.start()

761

self.checker_callback_tag = gobject.io_add_watch(

762

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

1096

self.checker_callback_tag = GLib.io_add_watch(

1097

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

763

1098

self.checker_callback, pipe[0], command)

764

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

1099

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

765

1100

return True

766

1101

767

1102

def stop_checker(self):

768

1103

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

769

1104

if self.checker_callback_tag:

770

gobject.source_remove(self.checker_callback_tag)

1105

GLib.source_remove(self.checker_callback_tag)

771

1106

self.checker_callback_tag = None

772

1107

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

773

1108

return

782

1117

byte_arrays=False):

783

1118

"""Decorators for marking methods of a DBusObjectWithProperties to

784

1119

become properties on the D-Bus.

785

1120

786

1121

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

787

1122

and with one argument by "Set".

788

1123

789

1124

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

790

1125

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

791

1126

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

795

1130

if byte_arrays and signature != "ay":

796

1131

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

797

1132

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

798

1133

799

1134

def decorator(func):

800

1135

func._dbus_is_property = True

801

1136

func._dbus_interface = dbus_interface

804

1139

func._dbus_name = func.__name__

805

1140

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

806

1141

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

807

func._dbus_get_args_options = {'byte_arrays': byte_arrays }

1142

func._dbus_get_args_options = {'byte_arrays': byte_arrays}

808

1143

return func

809

1144

810

1145

return decorator

811

1146

812

1147

813

1148

def dbus_interface_annotations(dbus_interface):

814

1149

"""Decorator for marking functions returning interface annotations

815

1150

816

1151

Usage:

817

1152

818

1153

@dbus_interface_annotations("org.example.Interface")

819

1154

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

820

1155

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

821

1156

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

822

1157

"false"}

823

1158

"""

824

1159

825

1160

def decorator(func):

826

1161

func._dbus_is_interface = True

827

1162

func._dbus_interface = dbus_interface

828

1163

func._dbus_name = dbus_interface

829

1164

return func

830

1165

831

1166

return decorator

832

1167

833

1168

834

1169

def dbus_annotations(annotations):

835

1170

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

836

1171

Usage:

837

1172

838

1173

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

839

1174

"org.freedesktop.DBus.Property."

840

1175

"EmitsChangedSignal": "false"})

842

1177

access="r")

843

1178

def Property_dbus_property(self):

844

1179

return dbus.Boolean(False)

845

1180

846

1181

See also the DBusObjectWithAnnotations class.

847

1182

"""

848

1183

849

1184

def decorator(func):

850

1185

func._dbus_annotations = annotations

851

1186

return func

852

1187

853

1188

return decorator

854

1189

855

1190

873

1208

874

1209

class DBusObjectWithAnnotations(dbus.service.Object):

875

1210

"""A D-Bus object with annotations.

876

1211

877

1212

Classes inheriting from this can use the dbus_annotations

878

1213

decorator to add annotations to methods or signals.

879

1214

"""

880

1215

881

1216

@staticmethod

882

1217

def _is_dbus_thing(thing):

883

1218

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

884

1219

885

1220

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

886

1221

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

887

1222

"""

888

1223

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

889

1224

False)

890

1225

891

1226

def _get_all_dbus_things(self, thing):

892

1227

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

893

1228

"""

896

1231

for cls in self.__class__.__mro__

897

1232

for name, athing in

898

1233

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

899

1234

900

1235

@dbus.service.method(dbus.INTROSPECTABLE_IFACE,

901

out_signature = "s",

902

path_keyword = 'object_path',

903

connection_keyword = 'connection')

1236

out_signature="s",

1237

path_keyword='object_path',

1238

connection_keyword='connection')

904

1239

def Introspect(self, object_path, connection):

905

1240

"""Overloading of standard D-Bus method.

906

1241

907

1242

Inserts annotation tags on methods and signals.

908

1243

"""

909

1244

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

910

1245

connection)

911

1246

try:

912

1247

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

913

1248

914

1249

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

915

1250

# Add annotation tags

916

1251

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

943

1278

if_tag.appendChild(ann_tag)

944

1279

# Fix argument name for the Introspect method itself

945

1280

if (if_tag.getAttribute("name")

946

== dbus.INTROSPECTABLE_IFACE):

1281

== dbus.INTROSPECTABLE_IFACE):

947

1282

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

948

1283

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

949

1284

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

962

1297

963

1298

class DBusObjectWithProperties(DBusObjectWithAnnotations):

964

1299

"""A D-Bus object with properties.

965

1300

966

1301

Classes inheriting from this can use the dbus_service_property

967

1302

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

968

1303

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

969

1304

"""

970

1305

971

1306

def _get_dbus_property(self, interface_name, property_name):

972

1307

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

973

1308

property with the specified name and interface.

978

1313

if (value._dbus_name == property_name

979

1314

and value._dbus_interface == interface_name):

980

1315

return value.__get__(self)

981

1316

982

1317

# No such property

983

1318

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

984

1319

self.dbus_object_path, interface_name, property_name))

985

1320

1321

@classmethod

1322

def _get_all_interface_names(cls):

1323

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

1324

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

1325

"_dbus_interface", None)

1326

for x in (inspect.getmro(cls))

1327

for attr in dir(x))

1328

if name is not None)

1329

986

1330

@dbus.service.method(dbus.PROPERTIES_IFACE,

987

1331

in_signature="ss",

988

1332

out_signature="v")

996

1340

if not hasattr(value, "variant_level"):

997

1341

return value

998

1342

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

999

1343

1000

1344

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

1001

1345

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

1002

1346

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

1014

1358

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

1015

1359

for byte in value))

1016

1360

prop(value)

1017

1361

1018

1362

@dbus.service.method(dbus.PROPERTIES_IFACE,

1019

1363

in_signature="s",

1020

1364

out_signature="a{sv}")

1021

1365

def GetAll(self, interface_name):

1022

1366

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

1023

1367

standard.

1024

1368

1025

1369

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

1026

1370

"""

1027

1371

properties = {}

1038

1382

properties[name] = value

1039

1383

continue

1040

1384

properties[name] = type(value)(

1041

value, variant_level = value.variant_level + 1)

1385

value, variant_level=value.variant_level + 1)

1042

1386

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

1043

1387

1044

1388

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

1045

1389

def PropertiesChanged(self, interface_name, changed_properties,

1046

1390

invalidated_properties):

1048

1392

standard.

1049

1393

"""

1050

1394

pass

1051

1395

1052

1396

@dbus.service.method(dbus.INTROSPECTABLE_IFACE,

1053

1397

out_signature="s",

1054

1398

path_keyword='object_path',

1055

1399

connection_keyword='connection')

1056

1400

def Introspect(self, object_path, connection):

1057

1401

"""Overloading of standard D-Bus method.

1058

1402

1059

1403

Inserts property tags and interface annotation tags.

1060

1404

"""

1061

1405

xmlstring = DBusObjectWithAnnotations.Introspect(self,

1063

1407

connection)

1064

1408

try:

1065

1409

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

1066

1410

1067

1411

def make_tag(document, name, prop):

1068

1412

e = document.createElement("property")

1069

1413

e.setAttribute("name", name)

1070

1414

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

1071

1415

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

1072

1416

return e

1073

1417

1074

1418

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

1075

1419

# Add property tags

1076

1420

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

1119

1463

return xmlstring

1120

1464

1121

1465

1466

try:

1467

dbus.OBJECT_MANAGER_IFACE

1468

except AttributeError:

1469

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

1470

1471

1472

class DBusObjectWithObjectManager(DBusObjectWithAnnotations):

1473

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

1474

1475

Classes inheriting from this exposes the standard

1476

GetManagedObjects call and the InterfacesAdded and

1477

InterfacesRemoved signals on the standard

1478

"org.freedesktop.DBus.ObjectManager" interface.

1479

1480

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

1481

manually.

1482

"""

1483

@dbus.service.method(dbus.OBJECT_MANAGER_IFACE,

1484

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

1485

def GetManagedObjects(self):

1486

"""This function must be overridden"""

1487

raise NotImplementedError()

1488

1489

@dbus.service.signal(dbus.OBJECT_MANAGER_IFACE,

1490

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

1491

def InterfacesAdded(self, object_path, interfaces_and_properties):

1492

pass

1493

1494

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

1495

def InterfacesRemoved(self, object_path, interfaces):

1496

pass

1497

1498

@dbus.service.method(dbus.INTROSPECTABLE_IFACE,

1499

out_signature="s",

1500

path_keyword='object_path',

1501

connection_keyword='connection')

1502

def Introspect(self, object_path, connection):

1503

"""Overloading of standard D-Bus method.

1504

1505

Override return argument name of GetManagedObjects to be

1506

"objpath_interfaces_and_properties"

1507

"""

1508

xmlstring = DBusObjectWithAnnotations.Introspect(self,

1509

object_path,

1510

connection)

1511

try:

1512

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

1513

1514

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

1515

# Fix argument name for the GetManagedObjects method

1516

if (if_tag.getAttribute("name")

1517

== dbus.OBJECT_MANAGER_IFACE):

1518

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

1519

if (cn.getAttribute("name")

1520

== "GetManagedObjects"):

1521

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

1522

if (arg.getAttribute("direction")

1523

== "out"):

1524

arg.setAttribute(

1525

"name",

1526

"objpath_interfaces"

1527

"_and_properties")

1528

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

1529

document.unlink()

1530

except (AttributeError, xml.dom.DOMException,

1531

xml.parsers.expat.ExpatError) as error:

1532

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

1533

exc_info=error)

1534

return xmlstring

1535

1536

1122

1537

def datetime_to_dbus(dt, variant_level=0):

1123

1538

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

1124

1539

if dt is None:

1125

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

1540

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

1126

1541

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

1127

1542

1128

1543

1131

1546

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

1132

1547

interface names according to the "alt_interface_names" mapping.

1133

1548

Usage:

1134

1549

1135

1550

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

1136

1551

"net.example.AlternateInterface"})

1137

1552

class SampleDBusObject(dbus.service.Object):

1138

1553

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

1139

1554

def SampleDBusMethod():

1140

1555

pass

1141

1556

1142

1557

The above "SampleDBusMethod" on "SampleDBusObject" will be

1143

1558

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

1144

1559

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

1145

1560

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

1146

1561

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

1147

1562

1148

1563

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

1149

1564

(from DBusObjectWithProperties) and interfaces (from the

1150

1565

dbus_interface_annotations decorator).

1151

1566

"""

1152

1567

1153

1568

def wrapper(cls):

1154

1569

for orig_interface_name, alt_interface_name in (

1155

1570

alt_interface_names.items()):

1170

1585

interface_names.add(alt_interface)

1171

1586

# Is this a D-Bus signal?

1172

1587

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

1588

# Extract the original non-method undecorated

1589

# function by black magic

1173

1590

if sys.version_info.major == 2:

1174

# Extract the original non-method undecorated

1175

# function by black magic

1176

1591

nonmethod_func = (dict(

1177

1592

zip(attribute.func_code.co_freevars,

1178

1593

attribute.__closure__))

1179

1594

["func"].cell_contents)

1180

1595

else:

1181

nonmethod_func = attribute

1596

nonmethod_func = (dict(

1597

zip(attribute.__code__.co_freevars,

1598

attribute.__closure__))

1599

["func"].cell_contents)

1182

1600

# Create a new, but exactly alike, function

1183

1601

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

1184

1602

# with the alternate D-Bus interface name

1185

if sys.version_info.major == 2:

1186

new_function = types.FunctionType(

1187

nonmethod_func.func_code,

1188

nonmethod_func.func_globals,

1189

nonmethod_func.func_name,

1190

nonmethod_func.func_defaults,

1191

nonmethod_func.func_closure)

1192

else:

1193

new_function = types.FunctionType(

1194

nonmethod_func.__code__,

1195

nonmethod_func.__globals__,

1196

nonmethod_func.__name__,

1197

nonmethod_func.__defaults__,

1198

nonmethod_func.__closure__)

1603

new_function = copy_function(nonmethod_func)

1199

1604

new_function = (dbus.service.signal(

1200

1605

alt_interface,

1201

1606

attribute._dbus_signature)(new_function))

1205

1610

attribute._dbus_annotations)

1206

1611

except AttributeError:

1207

1612

pass

1613

1208

1614

# Define a creator of a function to call both the

1209

1615

# original and alternate functions, so both the

1210

1616

# original and alternate signals gets sent when

1213

1619

"""This function is a scope container to pass

1214

1620

func1 and func2 to the "call_both" function

1215

1621

outside of its arguments"""

1216

1622

1623

@functools.wraps(func2)

1217

1624

def call_both(*args, **kwargs):

1218

1625

"""This function will emit two D-Bus

1219

1626

signals by calling func1 and func2"""

1220

1627

func1(*args, **kwargs)

1221

1628

func2(*args, **kwargs)

1222

1629

# Make wrapper function look like a D-Bus

1630

# signal

1631

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

1632

if name.startswith("_dbus_"):

1633

setattr(call_both, name, attr)

1634

1223

1635

return call_both

1224

1636

# Create the "call_both" function and add it to

1225

1637

# the class

1235

1647

alt_interface,

1236

1648

attribute._dbus_in_signature,

1237

1649

attribute._dbus_out_signature)

1238

(types.FunctionType(attribute.func_code,

1239

attribute.func_globals,

1240

attribute.func_name,

1241

attribute.func_defaults,

1242

attribute.func_closure)))

1650

(copy_function(attribute)))

1243

1651

# Copy annotations, if any

1244

1652

try:

1245

1653

attr[attrname]._dbus_annotations = dict(

1257

1665

attribute._dbus_access,

1258

1666

attribute._dbus_get_args_options

1259

1667

["byte_arrays"])

1260

(types.FunctionType(

1261

attribute.func_code,

1262

attribute.func_globals,

1263

attribute.func_name,

1264

attribute.func_defaults,

1265

attribute.func_closure)))

1668

(copy_function(attribute)))

1266

1669

# Copy annotations, if any

1267

1670

try:

1268

1671

attr[attrname]._dbus_annotations = dict(

1277

1680

# to the class.

1278

1681

attr[attrname] = (

1279

1682

dbus_interface_annotations(alt_interface)

1280

(types.FunctionType(attribute.func_code,

1281

attribute.func_globals,

1282

attribute.func_name,

1283

attribute.func_defaults,

1284

attribute.func_closure)))

1683

(copy_function(attribute)))

1285

1684

if deprecate:

1286

1685

# Deprecate all alternate interfaces

1287

iname="_AlternateDBusNames_interface_annotation{}"

1686

iname = "_AlternateDBusNames_interface_annotation{}"

1288

1687

for interface_name in interface_names:

1289

1688

1290

1689

@dbus_interface_annotations(interface_name)

1291

1690

def func(self):

1292

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

1293

"true" }

1691

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

1692

"true"}

1294

1693

# Find an unused name

1295

1694

for aname in (iname.format(i)

1296

1695

for i in itertools.count()):

1300

1699

if interface_names:

1301

1700

# Replace the class with a new subclass of it with

1302

1701

# methods, signals, etc. as created above.

1303

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

1304

(cls, ), attr)

1702

if sys.version_info.major == 2:

1703

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

1704

(cls, ), attr)

1705

else:

1706

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

1707

(cls, ), attr)

1305

1708

return cls

1306

1709

1307

1710

return wrapper

1308

1711

1309

1712

1311

1714

"se.bsnet.fukt.Mandos"})

1312

1715

class ClientDBus(Client, DBusObjectWithProperties):

1313

1716

"""A Client class using D-Bus

1314

1717

1315

1718

Attributes:

1316

1719

dbus_object_path: dbus.ObjectPath

1317

1720

bus: dbus.SystemBus()

1318

1721

"""

1319

1722

1320

1723

runtime_expansions = (Client.runtime_expansions

1321

1724

+ ("dbus_object_path", ))

1322

1725

1323

1726

_interface = "se.recompile.Mandos.Client"

1324

1727

1325

1728

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

1326

1327

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

1729

1730

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

1328

1731

self.bus = bus

1329

1732

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

1330

1733

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

1336

1739

"/clients/" + client_object_name)

1337

1740

DBusObjectWithProperties.__init__(self, self.bus,

1338

1741

self.dbus_object_path)

1339

1742

1340

1743

def notifychangeproperty(transform_func, dbus_name,

1341

1744

type_func=lambda x: x,

1342

1745

variant_level=1,

1344

1747

_interface=_interface):

1345

1748

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

1346

1749

its changes to DBus.

1347

1750

1348

1751

transform_fun: Function that takes a value and a variant_level

1349

1752

and transforms it to a D-Bus type.

1350

1753

dbus_name: D-Bus name of the variable

1353

1756

variant_level: D-Bus variant level. Default: 1

1354

1757

"""

1355

1758

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

1356

1759

1357

1760

def setter(self, value):

1358

1761

if hasattr(self, "dbus_object_path"):

1359

1762

if (not hasattr(self, attrname) or

1366

1769

else:

1367

1770

dbus_value = transform_func(

1368

1771

type_func(value),

1369

variant_level = variant_level)

1772

variant_level=variant_level)

1370

1773

self.PropertyChanged(dbus.String(dbus_name),

1371

1774

dbus_value)

1372

1775

self.PropertiesChanged(

1373

1776

_interface,

1374

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

1375

dbus_value }),

1777

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

1778

dbus_value}),

1376

1779

dbus.Array())

1377

1780

setattr(self, attrname, value)

1378

1781

1379

1782

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

1380

1783

1381

1784

expires = notifychangeproperty(datetime_to_dbus, "Expires")

1382

1785

approvals_pending = notifychangeproperty(dbus.Boolean,

1383

1786

"ApprovalPending",

1384

type_func = bool)

1787

type_func=bool)

1385

1788

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

1386

1789

last_enabled = notifychangeproperty(datetime_to_dbus,

1387

1790

"LastEnabled")

1388

1791

checker = notifychangeproperty(

1389

1792

dbus.Boolean, "CheckerRunning",

1390

type_func = lambda checker: checker is not None)

1793

type_func=lambda checker: checker is not None)

1391

1794

last_checked_ok = notifychangeproperty(datetime_to_dbus,

1392

1795

"LastCheckedOK")

1393

1796

last_checker_status = notifychangeproperty(dbus.Int16,

1398

1801

"ApprovedByDefault")

1399

1802

approval_delay = notifychangeproperty(

1400

1803

dbus.UInt64, "ApprovalDelay",

1401

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

1804

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

1402

1805

approval_duration = notifychangeproperty(

1403

1806

dbus.UInt64, "ApprovalDuration",

1404

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

1807

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

1405

1808

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

1406

1809

timeout = notifychangeproperty(

1407

1810

dbus.UInt64, "Timeout",

1408

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

1811

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

1409

1812

extended_timeout = notifychangeproperty(

1410

1813

dbus.UInt64, "ExtendedTimeout",

1411

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

1814

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

1412

1815

interval = notifychangeproperty(

1413

1816

dbus.UInt64, "Interval",

1414

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

1817

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

1415

1818

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

1416

1819

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

1417

1820

invalidate_only=True)

1418

1821

1419

1822

del notifychangeproperty

1420

1823

1421

1824

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

1422

1825

try:

1423

1826

self.remove_from_connection()

1426

1829

if hasattr(DBusObjectWithProperties, "__del__"):

1427

1830

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

1428

1831

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

1429

1832

1430

1833

def checker_callback(self, source, condition,

1431

1834

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

1432

1835

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

1448

1851

| self.last_checker_signal),

1449

1852

dbus.String(command))

1450

1853

return ret

1451

1854

1452

1855

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

1453

1856

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

1454

1857

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

1458

1861

# Emit D-Bus signal

1459

1862

self.CheckerStarted(self.current_checker_command)

1460

1863

return r

1461

1864

1462

1865

def _reset_approved(self):

1463

1866

self.approved = None

1464

1867

return False

1465

1868

1466

1869

def approve(self, value=True):

1467

1870

self.approved = value

1468

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

1469

* 1000), self._reset_approved)

1871

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

1872

* 1000), self._reset_approved)

1470

1873

self.send_changedstate()

1471

1472

## D-Bus methods, signals & properties

1473

1474

## Interfaces

1475

1476

## Signals

1477

1874

1875

# D-Bus methods, signals & properties

1876

1877

# Interfaces

1878

1879

# Signals

1880

1478

1881

# CheckerCompleted - signal

1479

1882

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

1480

1883

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

1481

1884

"D-Bus signal"

1482

1885

pass

1483

1886

1484

1887

# CheckerStarted - signal

1485

1888

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

1486

1889

def CheckerStarted(self, command):

1487

1890

"D-Bus signal"

1488

1891

pass

1489

1892

1490

1893

# PropertyChanged - signal

1491

1894

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

1492

1895

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

1493

1896

def PropertyChanged(self, property, value):

1494

1897

"D-Bus signal"

1495

1898

pass

1496

1899

1497

1900

# GotSecret - signal

1498

1901

@dbus.service.signal(_interface)

1499

1902

def GotSecret(self):

1502

1905

server to mandos-client

1503

1906

"""

1504

1907

pass

1505

1908

1506

1909

# Rejected - signal

1507

1910

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

1508

1911

def Rejected(self, reason):

1509

1912

"D-Bus signal"

1510

1913

pass

1511

1914

1512

1915

# NeedApproval - signal

1513

1916

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

1514

1917

def NeedApproval(self, timeout, default):

1515

1918

"D-Bus signal"

1516

1919

return self.need_approval()

1517

1518

## Methods

1519

1920

1921

# Methods

1922

1520

1923

# Approve - method

1521

1924

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

1522

1925

def Approve(self, value):

1523

1926

self.approve(value)

1524

1927

1525

1928

# CheckedOK - method

1526

1929

@dbus.service.method(_interface)

1527

1930

def CheckedOK(self):

1528

1931

self.checked_ok()

1529

1932

1530

1933

# Enable - method

1531

1934

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

1532

1935

@dbus.service.method(_interface)

1533

1936

def Enable(self):

1534

1937

"D-Bus method"

1535

1938

self.enable()

1536

1939

1537

1940

# StartChecker - method

1538

1941

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

1539

1942

@dbus.service.method(_interface)

1540

1943

def StartChecker(self):

1541

1944

"D-Bus method"

1542

1945

self.start_checker()

1543

1946

1544

1947

# Disable - method

1545

1948

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

1546

1949

@dbus.service.method(_interface)

1547

1950

def Disable(self):

1548

1951

"D-Bus method"

1549

1952

self.disable()

1550

1953

1551

1954

# StopChecker - method

1552

1955

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

1553

1956

@dbus.service.method(_interface)

1554

1957

def StopChecker(self):

1555

1958

self.stop_checker()

1556

1557

## Properties

1558

1959

1960

# Properties

1961

1559

1962

# ApprovalPending - property

1560

1963

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

1561

1964

def ApprovalPending_dbus_property(self):

1562

1965

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

1563

1966

1564

1967

# ApprovedByDefault - property

1565

1968

@dbus_service_property(_interface,

1566

1969

signature="b",

1569

1972

if value is None: # get

1570

1973

return dbus.Boolean(self.approved_by_default)

1571

1974

self.approved_by_default = bool(value)

1572

1975

1573

1976

# ApprovalDelay - property

1574

1977

@dbus_service_property(_interface,

1575

1978

signature="t",

1579

1982

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

1580

1983

* 1000)

1581

1984

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

1582

1985

1583

1986

# ApprovalDuration - property

1584

1987

@dbus_service_property(_interface,

1585

1988

signature="t",

1589

1992

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

1590

1993

* 1000)

1591

1994

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

1592

1995

1593

1996

# Name - property

1594

1997

@dbus_annotations(

1595

1998

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

1596

1999

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

1597

2000

def Name_dbus_property(self):

1598

2001

return dbus.String(self.name)

1599

2002

1600

2003

# Fingerprint - property

1601

2004

@dbus_annotations(

1602

2005

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

1603

2006

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

1604

2007

def Fingerprint_dbus_property(self):

1605

2008

return dbus.String(self.fingerprint)

1606

2009

1607

2010

# Host - property

1608

2011

@dbus_service_property(_interface,

1609

2012

signature="s",

1612

2015

if value is None: # get

1613

2016

return dbus.String(self.host)

1614

2017

self.host = str(value)

1615

2018

1616

2019

# Created - property

1617

2020

@dbus_annotations(

1618

2021

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

1619

2022

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

1620

2023

def Created_dbus_property(self):

1621

2024

return datetime_to_dbus(self.created)

1622

2025

1623

2026

# LastEnabled - property

1624

2027

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

1625

2028

def LastEnabled_dbus_property(self):

1626

2029

return datetime_to_dbus(self.last_enabled)

1627

2030

1628

2031

# Enabled - property

1629

2032

@dbus_service_property(_interface,

1630

2033

signature="b",

1636

2039

self.enable()

1637

2040

else:

1638

2041

self.disable()

1639

2042

1640

2043

# LastCheckedOK - property

1641

2044

@dbus_service_property(_interface,

1642

2045

signature="s",

1646

2049

self.checked_ok()

1647

2050

return

1648

2051

return datetime_to_dbus(self.last_checked_ok)

1649

2052

1650

2053

# LastCheckerStatus - property

1651

2054

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

1652

2055

def LastCheckerStatus_dbus_property(self):

1653

2056

return dbus.Int16(self.last_checker_status)

1654

2057

1655

2058

# Expires - property

1656

2059

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

1657

2060

def Expires_dbus_property(self):

1658

2061

return datetime_to_dbus(self.expires)

1659

2062

1660

2063

# LastApprovalRequest - property

1661

2064

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

1662

2065

def LastApprovalRequest_dbus_property(self):

1663

2066

return datetime_to_dbus(self.last_approval_request)

1664

2067

1665

2068

# Timeout - property

1666

2069

@dbus_service_property(_interface,

1667

2070

signature="t",

1682

2085

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

1683

2086

is None):

1684

2087

return

1685

gobject.source_remove(self.disable_initiator_tag)

1686

self.disable_initiator_tag = gobject.timeout_add(

2088

GLib.source_remove(self.disable_initiator_tag)

2089

self.disable_initiator_tag = GLib.timeout_add(

1687

2090

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

1688

2091

self.disable)

1689

2092

1690

2093

# ExtendedTimeout - property

1691

2094

@dbus_service_property(_interface,

1692

2095

signature="t",

1696

2099

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

1697

2100

* 1000)

1698

2101

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

1699

2102

1700

2103

# Interval - property

1701

2104

@dbus_service_property(_interface,

1702

2105

signature="t",

1709

2112

return

1710

2113

if self.enabled:

1711

2114

# Reschedule checker run

1712

gobject.source_remove(self.checker_initiator_tag)

1713

self.checker_initiator_tag = gobject.timeout_add(

2115

GLib.source_remove(self.checker_initiator_tag)

2116

self.checker_initiator_tag = GLib.timeout_add(

1714

2117

value, self.start_checker)

1715

self.start_checker() # Start one now, too

1716

2118

self.start_checker() # Start one now, too

2119

1717

2120

# Checker - property

1718

2121

@dbus_service_property(_interface,

1719

2122

signature="s",

1722

2125

if value is None: # get

1723

2126

return dbus.String(self.checker_command)

1724

2127

self.checker_command = str(value)

1725

2128

1726

2129

# CheckerRunning - property

1727

2130

@dbus_service_property(_interface,

1728

2131

signature="b",

1734

2137

self.start_checker()

1735

2138

else:

1736

2139

self.stop_checker()

1737

2140

1738

2141

# ObjectPath - property

1739

2142

@dbus_annotations(

1740

2143

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

1741

2144

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

1742

2145

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

1743

2146

def ObjectPath_dbus_property(self):

1744

return self.dbus_object_path # is already a dbus.ObjectPath

1745

2147

return self.dbus_object_path # is already a dbus.ObjectPath

2148

1746

2149

# Secret = property

1747

2150

@dbus_annotations(

1748

2151

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

1753

2156

byte_arrays=True)

1754

2157

def Secret_dbus_property(self, value):

1755

2158

self.secret = bytes(value)

1756

2159

1757

2160

del _interface

1758

2161

1759

2162

1763

2166

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

1764

2167

if not self._pipe.recv():

1765

2168

raise KeyError(fpr)

1766

2169

1767

2170

def __getattribute__(self, name):

1768

2171

if name == '_pipe':

1769

2172

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

1772

2175

if data[0] == 'data':

1773

2176

return data[1]

1774

2177

if data[0] == 'function':

1775

2178

1776

2179

def func(*args, **kwargs):

1777

2180

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

1778

2181

return self._pipe.recv()[1]

1779

2182

1780

2183

return func

1781

2184

1782

2185

def __setattr__(self, name, value):

1783

2186

if name == '_pipe':

1784

2187

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

1787

2190

1788

2191

class ClientHandler(socketserver.BaseRequestHandler, object):

1789

2192

"""A class to handle client connections.

1790

2193

1791

2194

Instantiated once for each connection to handle it.

1792

2195

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

1793

2196

1794

2197

def handle(self):

1795

2198

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

1796

2199

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

1797

2200

str(self.client_address))

1798

2201

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

1799

2202

self.server.child_pipe.fileno())

1800

1801

session = gnutls.connection.ClientSession(

1802

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

1803

1804

# Note: gnutls.connection.X509Credentials is really a

1805

# generic GnuTLS certificate credentials object so long as

1806

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

1807

# here despite using OpenPGP certificates.

1808

1809

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

1810

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

1811

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

1812

# "+DHE-DSS"))

2203

2204

session = gnutls.ClientSession(self.request)

2205

2206

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

2207

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

2208

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

2209

# "+DHE-DSS"))

1813

2210

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

1814

2211

priority = self.server.gnutls_priority

1815

2212

if priority is None:

1816

2213

priority = "NORMAL"

1817

gnutls.library.functions.gnutls_priority_set_direct(

1818

session._c_object, priority, None)

1819

2214

gnutls.priority_set_direct(session._c_object,

2215

priority.encode("utf-8"),

2216

None)

2217

1820

2218

# Start communication using the Mandos protocol

1821

2219

# Get protocol number

1822

2220

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

1827

2225

except (ValueError, IndexError, RuntimeError) as error:

1828

2226

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

1829

2227

return

1830

2228

1831

2229

# Start GnuTLS connection

1832

2230

try:

1833

2231

session.handshake()

1834

except gnutls.errors.GNUTLSError as error:

2232

except gnutls.Error as error:

1835

2233

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

1836

2234

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

1837

2235

# established. Just abandon the request.

1838

2236

return

1839

2237

logger.debug("Handshake succeeded")

1840

2238

1841

2239

approval_required = False

1842

2240

try:

1843

2241

try:

1844

2242

fpr = self.fingerprint(

1845

2243

self.peer_certificate(session))

1846

except (TypeError,

1847

gnutls.errors.GNUTLSError) as error:

2244

except (TypeError, gnutls.Error) as error:

1848

2245

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

1849

2246

return

1850

2247

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

1851

2248

1852

2249

try:

1853

2250

client = ProxyClient(child_pipe, fpr,

1854

2251

self.client_address)

1855

2252

except KeyError:

1856

2253

return

1857

2254

1858

2255

if client.approval_delay:

1859

2256

delay = client.approval_delay

1860

2257

client.approvals_pending += 1

1861

2258

approval_required = True

1862

2259

1863

2260

while True:

1864

2261

if not client.enabled:

1865

2262

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

1868

2265

# Emit D-Bus signal

1869

2266

client.Rejected("Disabled")

1870

2267

return

1871

2268

1872

2269

if client.approved or not client.approval_delay:

1873

#We are approved or approval is disabled

2270

# We are approved or approval is disabled

1874

2271

break

1875

2272

elif client.approved is None:

1876

2273

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

1887

2284

# Emit D-Bus signal

1888

2285

client.Rejected("Denied")

1889

2286

return

1890

1891

#wait until timeout or approved

2287

2288

# wait until timeout or approved

1892

2289

time = datetime.datetime.now()

1893

2290

client.changedstate.acquire()

1894

2291

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

1907

2304

break

1908

2305

else:

1909

2306

delay -= time2 - time

1910

1911

sent_size = 0

1912

while sent_size < len(client.secret):

1913

try:

1914

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

1915

except gnutls.errors.GNUTLSError as error:

1916

logger.warning("gnutls send failed",

1917

exc_info=error)

1918

return

1919

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

1920

len(client.secret) - (sent_size

1921

+ sent))

1922

sent_size += sent

1923

2307

2308

try:

2309

session.send(client.secret)

2310

except gnutls.Error as error:

2311

logger.warning("gnutls send failed",

2312

exc_info=error)

2313

return

2314

1924

2315

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

1925

2316

# bump the timeout using extended_timeout

1926

2317

client.bump_timeout(client.extended_timeout)

1927

2318

if self.server.use_dbus:

1928

2319

# Emit D-Bus signal

1929

2320

client.GotSecret()

1930

2321

1931

2322

finally:

1932

2323

if approval_required:

1933

2324

client.approvals_pending -= 1

1934

2325

try:

1935

2326

session.bye()

1936

except gnutls.errors.GNUTLSError as error:

2327

except gnutls.Error as error:

1937

2328

logger.warning("GnuTLS bye failed",

1938

2329

exc_info=error)

1939

2330

1940

2331

@staticmethod

1941

2332

def peer_certificate(session):

1942

2333

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

1943

2334

# If not an OpenPGP certificate...

1944

if (gnutls.library.functions.gnutls_certificate_type_get(

1945

session._c_object)

1946

!= gnutls.library.constants.GNUTLS_CRT_OPENPGP):

1947

# ...do the normal thing

1948

return session.peer_certificate

2335

if (gnutls.certificate_type_get(session._c_object)

2336

!= gnutls.CRT_OPENPGP):

2337

# ...return invalid data

2338

return b""

1949

2339

list_size = ctypes.c_uint(1)

1950

cert_list = (gnutls.library.functions

1951

.gnutls_certificate_get_peers

2340

cert_list = (gnutls.certificate_get_peers

1952

2341

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

1953

2342

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

1954

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

1955

" certificate")

2343

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

1956

2344

if list_size.value == 0:

1957

2345

return None

1958

2346

cert = cert_list[0]

1959

2347

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

1960

2348

1961

2349

@staticmethod

1962

2350

def fingerprint(openpgp):

1963

2351

"Convert an OpenPGP bytestring to a hexdigit fingerprint"

1964

2352

# New GnuTLS "datum" with the OpenPGP public key

1965

datum = gnutls.library.types.gnutls_datum_t(

2353

datum = gnutls.datum_t(

1966

2354

ctypes.cast(ctypes.c_char_p(openpgp),

1967

2355

ctypes.POINTER(ctypes.c_ubyte)),

1968

2356

ctypes.c_uint(len(openpgp)))

1969

2357

# New empty GnuTLS certificate

1970

crt = gnutls.library.types.gnutls_openpgp_crt_t()

1971

gnutls.library.functions.gnutls_openpgp_crt_init(

1972

ctypes.byref(crt))

2358

crt = gnutls.openpgp_crt_t()

2359

gnutls.openpgp_crt_init(ctypes.byref(crt))

1973

2360

# Import the OpenPGP public key into the certificate

1974

gnutls.library.functions.gnutls_openpgp_crt_import(

1975

crt, ctypes.byref(datum),

1976

gnutls.library.constants.GNUTLS_OPENPGP_FMT_RAW)

2361

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

2362

gnutls.OPENPGP_FMT_RAW)

1977

2363

# Verify the self signature in the key

1978

2364

crtverify = ctypes.c_uint()

1979

gnutls.library.functions.gnutls_openpgp_crt_verify_self(

1980

crt, 0, ctypes.byref(crtverify))

2365

gnutls.openpgp_crt_verify_self(crt, 0,

2366

ctypes.byref(crtverify))

1981

2367

if crtverify.value != 0:

1982

gnutls.library.functions.gnutls_openpgp_crt_deinit(crt)

1983

raise gnutls.errors.CertificateSecurityError(

1984

"Verify failed")

2368

gnutls.openpgp_crt_deinit(crt)

2369

raise gnutls.CertificateSecurityError("Verify failed")

1985

2370

# New buffer for the fingerprint

1986

2371

buf = ctypes.create_string_buffer(20)

1987

2372

buf_len = ctypes.c_size_t()

1988

2373

# Get the fingerprint from the certificate into the buffer

1989

gnutls.library.functions.gnutls_openpgp_crt_get_fingerprint(

1990

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

2374

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

2375

ctypes.byref(buf_len))

1991

2376

# Deinit the certificate

1992

gnutls.library.functions.gnutls_openpgp_crt_deinit(crt)

2377

gnutls.openpgp_crt_deinit(crt)

1993

2378

# Convert the buffer to a Python bytestring

1994

2379

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

1995

2380

# Convert the bytestring to hexadecimal notation

1999

2384

2000

2385

class MultiprocessingMixIn(object):

2001

2386

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

2002

2387

2003

2388

def sub_process_main(self, request, address):

2004

2389

try:

2005

2390

self.finish_request(request, address)

2006

2391

except Exception:

2007

2392

self.handle_error(request, address)

2008

2393

self.close_request(request)

2009

2394

2010

2395

def process_request(self, request, address):

2011

2396

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

2012

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

2013

args = (request, address))

2397

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

2398

args=(request, address))

2014

2399

proc.start()

2015

2400

return proc

2016

2401

2017

2402

2018

2403

class MultiprocessingMixInWithPipe(MultiprocessingMixIn, object):

2019

2404

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

2020

2405

2021

2406

def process_request(self, request, client_address):

2022

2407

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

2023

2408

2024

2409

This function creates a new pipe in self.pipe

2025

2410

"""

2026

2411

parent_pipe, self.child_pipe = multiprocessing.Pipe()

2027

2412

2028

2413

proc = MultiprocessingMixIn.process_request(self, request,

2029

2414

client_address)

2030

2415

self.child_pipe.close()

2031

2416

self.add_pipe(parent_pipe, proc)

2032

2417

2033

2418

def add_pipe(self, parent_pipe, proc):

2034

2419

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

2035

2420

raise NotImplementedError()

2038

2423

class IPv6_TCPServer(MultiprocessingMixInWithPipe,

2039

2424

socketserver.TCPServer, object):

2040

2425

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

2041

2426

2042

2427

Attributes:

2043

2428

enabled: Boolean; whether this server is activated yet

2044

2429

interface: None or a network interface name (string)

2045

2430

use_ipv6: Boolean; to use IPv6 or not

2046

2431

"""

2047

2432

2048

2433

def __init__(self, server_address, RequestHandlerClass,

2049

2434

interface=None,

2050

2435

use_ipv6=True,

2060

2445

self.socketfd = socketfd

2061

2446

# Save the original socket.socket() function

2062

2447

self.socket_socket = socket.socket

2448

2063

2449

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

2064

#

2450

#

2065

2451

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

2066

2452

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

2067

2453

# patching socket.socket.)

2068

#

2454

#

2069

2455

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

2070

2456

@functools.wraps(socket.socket)

2071

2457

def socket_wrapper(*args, **kwargs):

2083

2469

# socket_wrapper(), if socketfd was set.

2084

2470

socketserver.TCPServer.__init__(self, server_address,

2085

2471

RequestHandlerClass)

2086

2472

2087

2473

def server_bind(self):

2088

2474

"""This overrides the normal server_bind() function

2089

2475

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

2090

2476

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

2477

global SO_BINDTODEVICE

2091

2478

if self.interface is not None:

2092

2479

if SO_BINDTODEVICE is None:

2093

logger.error("SO_BINDTODEVICE does not exist;"

2094

" cannot bind to interface %s",

2095

self.interface)

2096

else:

2097

try:

2098

self.socket.setsockopt(

2099

socket.SOL_SOCKET, SO_BINDTODEVICE,

2100

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

2101

except socket.error as error:

2102

if error.errno == errno.EPERM:

2103

logger.error("No permission to bind to"

2104

" interface %s", self.interface)

2105

elif error.errno == errno.ENOPROTOOPT:

2106

logger.error("SO_BINDTODEVICE not available;"

2107

" cannot bind to interface %s",

2108

self.interface)

2109

elif error.errno == errno.ENODEV:

2110

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

2111

" cannot bind", self.interface)

2112

else:

2113

raise

2480

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

2481

# common enough.

2482

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

2483

SO_BINDTODEVICE = 25

2484

try:

2485

self.socket.setsockopt(

2486

socket.SOL_SOCKET, SO_BINDTODEVICE,

2487

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

2488

except socket.error as error:

2489

if error.errno == errno.EPERM:

2490

logger.error("No permission to bind to"

2491

" interface %s", self.interface)

2492

elif error.errno == errno.ENOPROTOOPT:

2493

logger.error("SO_BINDTODEVICE not available;"

2494

" cannot bind to interface %s",

2495

self.interface)

2496

elif error.errno == errno.ENODEV:

2497

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

2498

" cannot bind", self.interface)

2499

else:

2500

raise

2114

2501

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

2115

2502

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

2116

2503

if not self.server_address[0]:

2117

2504

if self.address_family == socket.AF_INET6:

2118

any_address = "::" # in6addr_any

2505

any_address = "::" # in6addr_any

2119

2506

else:

2120

any_address = "0.0.0.0" # INADDR_ANY

2507

any_address = "0.0.0.0" # INADDR_ANY

2121

2508

self.server_address = (any_address,

2122

2509

self.server_address[1])

2123

2510

elif not self.server_address[1]:

2133

2520

2134

2521

class MandosServer(IPv6_TCPServer):

2135

2522

"""Mandos server.

2136

2523

2137

2524

Attributes:

2138

2525

clients: set of Client objects

2139

2526

gnutls_priority GnuTLS priority string

2140

2527

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

2141

2142

Assumes a gobject.MainLoop event loop.

2528

2529

Assumes a GLib.MainLoop event loop.

2143

2530

"""

2144

2531

2145

2532

def __init__(self, server_address, RequestHandlerClass,

2146

2533

interface=None,

2147

2534

use_ipv6=True,

2157

2544

self.gnutls_priority = gnutls_priority

2158

2545

IPv6_TCPServer.__init__(self, server_address,

2159

2546

RequestHandlerClass,

2160

interface = interface,

2161

use_ipv6 = use_ipv6,

2162

socketfd = socketfd)

2163

2547

interface=interface,

2548

use_ipv6=use_ipv6,

2549

socketfd=socketfd)

2550

2164

2551

def server_activate(self):

2165

2552

if self.enabled:

2166

2553

return socketserver.TCPServer.server_activate(self)

2167

2554

2168

2555

def enable(self):

2169

2556

self.enabled = True

2170

2557

2171

2558

def add_pipe(self, parent_pipe, proc):

2172

2559

# Call "handle_ipc" for both data and EOF events

2173

gobject.io_add_watch(

2560

GLib.io_add_watch(

2174

2561

parent_pipe.fileno(),

2175

gobject.IO_IN | gobject.IO_HUP,

2562

GLib.IO_IN | GLib.IO_HUP,

2176

2563

functools.partial(self.handle_ipc,

2177

parent_pipe = parent_pipe,

2178

proc = proc))

2179

2564

parent_pipe=parent_pipe,

2565

proc=proc))

2566

2180

2567

def handle_ipc(self, source, condition,

2181

2568

parent_pipe=None,

2182

proc = None,

2569

proc=None,

2183

2570

client_object=None):

2184

2571

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

2185

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

2572

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

2186

2573

# Wait for other process to exit

2187

2574

proc.join()

2188

2575

return False

2189

2576

2190

2577

# Read a request from the child

2191

2578

request = parent_pipe.recv()

2192

2579

command = request[0]

2193

2580

2194

2581

if command == 'init':

2195

fpr = request[1]

2582

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

2196

2583

address = request[2]

2197

2198

for c in self.clients.itervalues():

2584

2585

for c in self.clients.values():

2199

2586

if c.fingerprint == fpr:

2200

2587

client = c

2201

2588

break

2208

2595

address[0])

2209

2596

parent_pipe.send(False)

2210

2597

return False

2211

2212

gobject.io_add_watch(

2598

2599

GLib.io_add_watch(

2213

2600

parent_pipe.fileno(),

2214

gobject.IO_IN | gobject.IO_HUP,

2601

GLib.IO_IN | GLib.IO_HUP,

2215

2602

functools.partial(self.handle_ipc,

2216

parent_pipe = parent_pipe,

2217

proc = proc,

2218

client_object = client))

2603

parent_pipe=parent_pipe,

2604

proc=proc,

2605

client_object=client))

2219

2606

parent_pipe.send(True)

2220

2607

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

2221

2608

# same fileno

2224

2611

funcname = request[1]

2225

2612

args = request[2]

2226

2613

kwargs = request[3]

2227

2614

2228

2615

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

2229

2616

funcname)(*args,

2230

2617

**kwargs)))

2231

2618

2232

2619

if command == 'getattr':

2233

2620

attrname = request[1]

2234

2621

if isinstance(client_object.__getattribute__(attrname),

2237

2624

else:

2238

2625

parent_pipe.send((

2239

2626

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

2240

2627

2241

2628

if command == 'setattr':

2242

2629

attrname = request[1]

2243

2630

value = request[2]

2244

2631

setattr(client_object, attrname, value)

2245

2632

2246

2633

return True

2247

2634

2248

2635

2249

2636

def rfc3339_duration_to_delta(duration):

2250

2637

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

2251

2638

2252

2639

>>> rfc3339_duration_to_delta("P7D")

2253

2640

datetime.timedelta(7)

2254

2641

>>> rfc3339_duration_to_delta("PT60S")

2264

2651

>>> rfc3339_duration_to_delta("P1DT3M20S")

2265

2652

datetime.timedelta(1, 200)

2266

2653

"""

2267

2654

2268

2655

# Parsing an RFC 3339 duration with regular expressions is not

2269

2656

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

2270

2657

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

2271

2658

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

2272

2659

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

2273

2660

# avoid excessive use of external libraries.

2274

2661

2275

2662

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

2276

2663

Token = collections.namedtuple("Token", (

2277

2664

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

2310

2697

frozenset((token_year, token_month,

2311

2698

token_day, token_time,

2312

2699

token_week)))

2313

# Define starting values

2314

value = datetime.timedelta() # Value so far

2700

# Define starting values:

2701

# Value so far

2702

value = datetime.timedelta()

2315

2703

found_token = None

2316

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

2317

s = duration # String left to parse

2704

# Following valid tokens

2705

followers = frozenset((token_duration, ))

2706

# String left to parse

2707

s = duration

2318

2708

# Loop until end token is found

2319

2709

while found_token is not token_end:

2320

2710

# Search for any currently valid tokens

2344

2734

2345

2735

def string_to_delta(interval):

2346

2736

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

2347

2737

2348

2738

>>> string_to_delta('7d')

2349

2739

datetime.timedelta(7)

2350

2740

>>> string_to_delta('60s')

2358

2748

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

2359

2749

datetime.timedelta(0, 330)

2360

2750

"""

2361

2751

2362

2752

try:

2363

2753

return rfc3339_duration_to_delta(interval)

2364

2754

except ValueError:

2365

2755

pass

2366

2756

2367

2757

timevalue = datetime.timedelta(0)

2368

2758

for s in interval.split():

2369

2759

try:

2387

2777

return timevalue

2388

2778

2389

2779

2390

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

2780

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

2391

2781

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

2392

2782

2393

2783

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

2394

2784

if os.fork():

2395

2785

sys.exit()

2413

2803

2414

2804

2415

2805

def main():

2416

2806

2417

2807

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

2418

2808

# Parsing of options, both command line and config file

2419

2809

2420

2810

parser = argparse.ArgumentParser()

2421

2811

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

2422

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

2812

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

2423

2813

help="show version number and exit")

2424

2814

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

2425

2815

help="Bind to interface IF")

2461

2851

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

2462

2852

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

2463

2853

default=None)

2464

2854

2465

2855

options = parser.parse_args()

2466

2856

2467

2857

if options.check:

2468

2858

import doctest

2469

2859

fail_count, test_count = doctest.testmod()

2470

2860

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

2471

2861

2472

2862

# Default values for config file for server-global settings

2473

server_defaults = { "interface": "",

2474

"address": "",

2475

"port": "",

2476

"debug": "False",

2477

"priority":

2478

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

2479

":+SIGN-DSA-SHA256",

2480

"servicename": "Mandos",

2481

"use_dbus": "True",

2482

"use_ipv6": "True",

2483

"debuglevel": "",

2484

"restore": "True",

2485

"socket": "",

2486

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

2487

"foreground": "False",

2488

"zeroconf": "True",

2489

}

2490

2863

server_defaults = {"interface": "",

2864

"address": "",

2865

"port": "",

2866

"debug": "False",

2867

"priority":

2868

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

2869

":+SIGN-DSA-SHA256",

2870

"servicename": "Mandos",

2871

"use_dbus": "True",

2872

"use_ipv6": "True",

2873

"debuglevel": "",

2874

"restore": "True",

2875

"socket": "",

2876

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

2877

"foreground": "False",

2878

"zeroconf": "True",

2879

}

2880

2491

2881

# Parse config file for server-global settings

2492

2882

server_config = configparser.SafeConfigParser(server_defaults)

2493

2883

del server_defaults

2495

2885

# Convert the SafeConfigParser object to a dict

2496

2886

server_settings = server_config.defaults()

2497

2887

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

2498

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

2888

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

2889

"foreground", "zeroconf"):

2499

2890

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

2500

2891

option)

2501

2892

if server_settings["port"]:

2511

2902

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

2512

2903

["socket"])

2513

2904

del server_config

2514

2905

2515

2906

# Override the settings from the config file with command line

2516

2907

# options, if set.

2517

2908

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

2535

2926

if server_settings["debug"]:

2536

2927

server_settings["foreground"] = True

2537

2928

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

2538

2929

2539

2930

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

2540

2931

2541

2932

if (not server_settings["zeroconf"]

2542

2933

and not (server_settings["port"]

2543

2934

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

2544

2935

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

2545

2936

2546

2937

# For convenience

2547

2938

debug = server_settings["debug"]

2548

2939

debuglevel = server_settings["debuglevel"]

2552

2943

stored_state_file)

2553

2944

foreground = server_settings["foreground"]

2554

2945

zeroconf = server_settings["zeroconf"]

2555

2946

2556

2947

if debug:

2557

2948

initlogger(debug, logging.DEBUG)

2558

2949

else:

2561

2952

else:

2562

2953

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

2563

2954

initlogger(debug, level)

2564

2955

2565

2956

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

2566

2957

syslogger.setFormatter(

2567

2958

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

2568

2959

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

2569

2960

server_settings["servicename"])))

2570

2961

2571

2962

# Parse config file with clients

2572

2963

client_config = configparser.SafeConfigParser(Client

2573

2964

.client_defaults)

2574

2965

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

2575

2966

"clients.conf"))

2576

2967

2577

2968

global mandos_dbus_service

2578

2969

mandos_dbus_service = None

2579

2970

2580

2971

socketfd = None

2581

2972

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

2582

2973

socketfd = server_settings["socket"]

2598

2989

except IOError as e:

2599

2990

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

2600

2991

exc_info=e)

2601

2602

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

2992

2993

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

2994

("mandos", "mandos"),

2995

("nobody", "nogroup")):

2603

2996

try:

2604

2997

uid = pwd.getpwnam(name).pw_uid

2605

gid = pwd.getpwnam(name).pw_gid

2998

gid = pwd.getpwnam(group).pw_gid

2606

2999

break

2607

3000

except KeyError:

2608

3001

continue

2612

3005

try:

2613

3006

os.setgid(gid)

2614

3007

os.setuid(uid)

3008

if debug:

3009

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

3010

gid))

2615

3011

except OSError as error:

3012

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

3013

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

2616

3014

if error.errno != errno.EPERM:

2617

3015

raise

2618

3016

2619

3017

if debug:

2620

3018

# Enable all possible GnuTLS debugging

2621

3019

2622

3020

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

2623

3021

# - GnuTLS manual

2624

gnutls.library.functions.gnutls_global_set_log_level(11)

2625

2626

@gnutls.library.types.gnutls_log_func

3022

gnutls.global_set_log_level(11)

3023

3024

@gnutls.log_func

2627

3025

def debug_gnutls(level, string):

2628

3026

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

2629

2630

gnutls.library.functions.gnutls_global_set_log_function(

2631

debug_gnutls)

2632

3027

3028

gnutls.global_set_log_function(debug_gnutls)

3029

2633

3030

# Redirect stdin so all checkers get /dev/null

2634

3031

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

2635

3032

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

2636

3033

if null > 2:

2637

3034

os.close(null)

2638

3035

2639

3036

# Need to fork before connecting to D-Bus

2640

3037

if not foreground:

2641

3038

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

2642

3039

daemon()

2643

2644

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

2645

# need to inform gobject that threads will be used.

2646

gobject.threads_init()

2647

3040

3041

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

3042

# to inform GLib that threads will be used.

3043

GLib.threads_init()

3044

2648

3045

global main_loop

2649

3046

# From the Avahi example code

2650

3047

DBusGMainLoop(set_as_default=True)

2651

main_loop = gobject.MainLoop()

3048

main_loop = GLib.MainLoop()

2652

3049

bus = dbus.SystemBus()

2653

3050

# End of Avahi example code

2654

3051

if use_dbus:

2667

3064

if zeroconf:

2668

3065

protocol = avahi.PROTO_INET6 if use_ipv6 else avahi.PROTO_INET

2669

3066

service = AvahiServiceToSyslog(

2670

name = server_settings["servicename"],

2671

servicetype = "_mandos._tcp",

2672

protocol = protocol,

2673

bus = bus)

3067

name=server_settings["servicename"],

3068

servicetype="_mandos._tcp",

3069

protocol=protocol,

3070

bus=bus)

2674

3071

if server_settings["interface"]:

2675

3072

service.interface = if_nametoindex(

2676

3073

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

2677

3074

2678

3075

global multiprocessing_manager

2679

3076

multiprocessing_manager = multiprocessing.Manager()

2680

3077

2681

3078

client_class = Client

2682

3079

if use_dbus:

2683

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

2684

3080

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

3081

2685

3082

client_settings = Client.config_parser(client_config)

2686

3083

old_client_settings = {}

2687

3084

clients_data = {}

2688

3085

2689

3086

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

2690

3087

global wnull

2691

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

3088

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

2692

3089

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

2693

3090

# mode

2694

3091

if debug or not foreground:

2695

3092

wnull.close()

2696

3093

2697

3094

# Get client data and settings from last running state.

2698

3095

if server_settings["restore"]:

2699

3096

try:

2700

3097

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

2701

clients_data, old_client_settings = pickle.load(

2702

stored_state)

3098

if sys.version_info.major == 2:

3099

clients_data, old_client_settings = pickle.load(

3100

stored_state)

3101

else:

3102

bytes_clients_data, bytes_old_client_settings = (

3103

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

3104

# Fix bytes to strings

3105

# clients_data

3106

# .keys()

3107

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

3108

if isinstance(key, bytes)

3109

else key): value

3110

for key, value in

3111

bytes_clients_data.items()}

3112

del bytes_clients_data

3113

for key in clients_data:

3114

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

3115

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

3116

for k, v in

3117

clients_data[key].items()}

3118

clients_data[key] = value

3119

# .client_structure

3120

value["client_structure"] = [

3121

(s.decode("utf-8")

3122

if isinstance(s, bytes)

3123

else s) for s in

3124

value["client_structure"]]

3125

# .name & .host

3126

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

3127

if isinstance(value[k], bytes):

3128

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

3129

# old_client_settings

3130

# .keys()

3131

old_client_settings = {

3132

(key.decode("utf-8")

3133

if isinstance(key, bytes)

3134

else key): value

3135

for key, value in

3136

bytes_old_client_settings.items()}

3137

del bytes_old_client_settings

3138

# .host

3139

for value in old_client_settings.values():

3140

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

3141

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

3142

.decode("utf-8"))

2703

3143

os.remove(stored_state_path)

2704

3144

except IOError as e:

2705

3145

if e.errno == errno.ENOENT:

2713

3153

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

2714

3154

"EOFError:",

2715

3155

exc_info=e)

2716

3156

2717

3157

with PGPEngine() as pgp:

2718

3158

for client_name, client in clients_data.items():

2719

3159

# Skip removed clients

2720

3160

if client_name not in client_settings:

2721

3161

continue

2722

3162

2723

3163

# Decide which value to use after restoring saved state.

2724

3164

# We have three different values: Old config file,

2725

3165

# new config file, and saved state.

2736

3176

client[name] = value

2737

3177

except KeyError:

2738

3178

pass

2739

3179

2740

3180

# Clients who has passed its expire date can still be

2741

3181

# enabled if its last checker was successful. A Client

2742

3182

# whose checker succeeded before we stored its state is

2775

3215

client_name))

2776

3216

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

2777

3217

["secret"])

2778

3218

2779

3219

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

2780

3220

for client_name in (set(old_client_settings)

2781

3221

- set(client_settings)):

2783

3223

for client_name in (set(client_settings)

2784

3224

- set(old_client_settings)):

2785

3225

clients_data[client_name] = client_settings[client_name]

2786

3226

2787

3227

# Create all client objects

2788

3228

for client_name, client in clients_data.items():

2789

3229

tcp_server.clients[client_name] = client_class(

2790

name = client_name,

2791

settings = client,

2792

server_settings = server_settings)

2793

3230

name=client_name,

3231

settings=client,

3232

server_settings=server_settings)

3233

2794

3234

if not tcp_server.clients:

2795

3235

logger.warning("No clients defined")

2796

3236

2797

3237

if not foreground:

2798

3238

if pidfile is not None:

2799

3239

pid = os.getpid()

2805

3245

pidfilename, pid)

2806

3246

del pidfile

2807

3247

del pidfilename

2808

2809

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

2810

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

2811

3248

3249

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

3250

GLib.unix_signal_add(GLib.PRIORITY_HIGH, termsig,

3251

lambda: main_loop.quit() and False)

3252

2812

3253

if use_dbus:

2813

3254

2814

3255

@alternate_dbus_interfaces(

2815

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

2816

class MandosDBusService(DBusObjectWithAnnotations):

3256

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

3257

class MandosDBusService(DBusObjectWithObjectManager):

2817

3258

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

2818

3259

2819

3260

def __init__(self):

2820

3261

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

2821

3262

2822

3263

_interface = "se.recompile.Mandos"

2823

3264

2824

3265

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

2825

3266

def ClientAdded(self, objpath):

2826

3267

"D-Bus signal"

2827

3268

pass

2828

3269

2829

3270

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

2830

3271

def ClientNotFound(self, fingerprint, address):

2831

3272

"D-Bus signal"

2832

3273

pass

2833

3274

3275

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

3276

"true"})

2834

3277

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

2835

3278

def ClientRemoved(self, objpath, name):

2836

3279

"D-Bus signal"

2837

3280

pass

2838

3281

3282

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

3283

"true"})

2839

3284

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

2840

3285

def GetAllClients(self):

2841

3286

"D-Bus method"

2842

3287

return dbus.Array(c.dbus_object_path for c in

2843

tcp_server.clients.itervalues())

2844

3288

tcp_server.clients.values())

3289

3290

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

3291

"true"})

2845

3292

@dbus.service.method(_interface,

2846

3293

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

2847

3294

def GetAllClientsWithProperties(self):

2848

3295

"D-Bus method"

2849

3296

return dbus.Dictionary(

2850

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

2851

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

3297

{c.dbus_object_path: c.GetAll(

3298

"se.recompile.Mandos.Client")

3299

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

2852

3300

signature="oa{sv}")

2853

3301

2854

3302

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

2855

3303

def RemoveClient(self, object_path):

2856

3304

"D-Bus method"

2857

for c in tcp_server.clients.itervalues():

3305

for c in tcp_server.clients.values():

2858

3306

if c.dbus_object_path == object_path:

2859

3307

del tcp_server.clients[c.name]

2860

3308

c.remove_from_connection()

2861

# Don't signal anything except ClientRemoved

3309

# Don't signal the disabling

2862

3310

c.disable(quiet=True)

2863

# Emit D-Bus signal

2864

self.ClientRemoved(object_path, c.name)

3311

# Emit D-Bus signal for removal

3312

self.client_removed_signal(c)

2865

3313

return

2866

3314

raise KeyError(object_path)

2867

3315

2868

3316

del _interface

2869

3317

3318

@dbus.service.method(dbus.OBJECT_MANAGER_IFACE,

3319

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

3320

def GetManagedObjects(self):

3321

"""D-Bus method"""

3322

return dbus.Dictionary(

3323

{client.dbus_object_path:

3324

dbus.Dictionary(

3325

{interface: client.GetAll(interface)

3326

for interface in

3327

client._get_all_interface_names()})

3328

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

3329

3330

def client_added_signal(self, client):

3331

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

3332

if use_dbus:

3333

# New standard signal

3334

self.InterfacesAdded(

3335

client.dbus_object_path,

3336

dbus.Dictionary(

3337

{interface: client.GetAll(interface)

3338

for interface in

3339

client._get_all_interface_names()}))

3340

# Old signal

3341

self.ClientAdded(client.dbus_object_path)

3342

3343

def client_removed_signal(self, client):

3344

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

3345

if use_dbus:

3346

# New standard signal

3347

self.InterfacesRemoved(

3348

client.dbus_object_path,

3349

client._get_all_interface_names())

3350

# Old signal

3351

self.ClientRemoved(client.dbus_object_path,

3352

client.name)

3353

2870

3354

mandos_dbus_service = MandosDBusService()

2871

3355

3356

# Save modules to variables to exempt the modules from being

3357

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

3358

mp = multiprocessing

3359

wn = wnull

3360

2872

3361

def cleanup():

2873

3362

"Cleanup function; run on exit"

2874

3363

if zeroconf:

2875

3364

service.cleanup()

2876

2877

multiprocessing.active_children()

2878

wnull.close()

3365

3366

mp.active_children()

3367

wn.close()

2879

3368

if not (tcp_server.clients or client_settings):

2880

3369

return

2881

3370

2882

3371

# Store client before exiting. Secrets are encrypted with key

2883

3372

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

2884

3373

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

2885

3374

clients = {}

2886

3375

with PGPEngine() as pgp:

2887

for client in tcp_server.clients.itervalues():

3376

for client in tcp_server.clients.values():

2888

3377

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

2889

3378

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

2890

3379

key)

2891

3380

client_dict = {}

2892

3381

2893

3382

# A list of attributes that can not be pickled

2894

3383

# + secret.

2895

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

2896

"checker", "server_settings" }

3384

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

3385

"checker", "server_settings"}

2897

3386

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

2898

3387

.Object):

2899

3388

exclude.add(name)

2900

3389

2901

3390

client_dict["encrypted_secret"] = (client

2902

3391

.encrypted_secret)

2903

3392

for attr in client.client_structure:

2904

3393

if attr not in exclude:

2905

3394

client_dict[attr] = getattr(client, attr)

2906

3395

2907

3396

clients[client.name] = client_dict

2908

3397

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

2909

3398

2910

3399

try:

2911

3400

with tempfile.NamedTemporaryFile(

2912

3401

mode='wb',

2914

3403

prefix='clients-',

2915

3404

dir=os.path.dirname(stored_state_path),

2916

3405

delete=False) as stored_state:

2917

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

3406

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

3407

protocol=2)

2918

3408

tempname = stored_state.name

2919

3409

os.rename(tempname, stored_state_path)

2920

3410

except (IOError, OSError) as e:

2930

3420

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

2931

3421

exc_info=e)

2932

3422

raise

2933

3423

2934

3424

# Delete all clients, and settings from config

2935

3425

while tcp_server.clients:

2936

3426

name, client = tcp_server.clients.popitem()

2937

3427

if use_dbus:

2938

3428

client.remove_from_connection()

2939

# Don't signal anything except ClientRemoved

3429

# Don't signal the disabling

2940

3430

client.disable(quiet=True)

3431

# Emit D-Bus signal for removal

2941

3432

if use_dbus:

2942

# Emit D-Bus signal

2943

mandos_dbus_service.ClientRemoved(

2944

client.dbus_object_path, client.name)

3433

mandos_dbus_service.client_removed_signal(client)

2945

3434

client_settings.clear()

2946

3435

2947

3436

atexit.register(cleanup)

2948

2949

for client in tcp_server.clients.itervalues():

3437

3438

for client in tcp_server.clients.values():

2950

3439

if use_dbus:

2951

# Emit D-Bus signal

2952

mandos_dbus_service.ClientAdded(client.dbus_object_path)

3440

# Emit D-Bus signal for adding

3441

mandos_dbus_service.client_added_signal(client)

2953

3442

# Need to initiate checking of clients

2954

3443

if client.enabled:

2955

3444

client.init_checker()

2956

3445

2957

3446

tcp_server.enable()

2958

3447

tcp_server.server_activate()

2959

3448

2960

3449

# Find out what port we got

2961

3450

if zeroconf:

2962

3451

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

2967

3456

else: # IPv4

2968

3457

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

2969

3458

*tcp_server.socket.getsockname())

2970

2971

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

2972

3459

3460

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

3461

2973

3462

try:

2974

3463

if zeroconf:

2975

3464

# From the Avahi example code

2980

3469

cleanup()

2981

3470

sys.exit(1)

2982

3471

# End of Avahi example code

2983

2984

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

2985

lambda *args, **kwargs:

2986

(tcp_server.handle_request

2987

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

2988

3472

3473

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

3474

lambda *args, **kwargs:

3475

(tcp_server.handle_request

3476

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

3477

2989

3478

logger.debug("Starting main loop")

2990

3479

main_loop.run()

2991

3480

except AvahiError as error: