/mandos/trunk : revision 24.1.186

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# "AvahiService" class, and some lines in "main".

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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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# along with this program. If not, see

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

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#

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# Contact the authors at <mandos@recompile.se>.

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# Contact the authors at <mandos@fukt.bsnet.se>.

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#

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from __future__ import (division, absolute_import, print_function,

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unicode_literals)

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try:

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from future_builtins import *

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except ImportError:

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pass

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try:

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import SocketServer as socketserver

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except ImportError:

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import socketserver

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import SocketServer as socketserver

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import socket

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import argparse

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import datetime

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import errno

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try:

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import ConfigParser as configparser

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except ImportError:

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import configparser

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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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import ConfigParser as configparser

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import sys

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import re

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import os

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import struct

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import fcntl

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import functools

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try:

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import cPickle as pickle

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except ImportError:

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import pickle

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import cPickle as pickle

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import multiprocessing

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import types

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import binascii

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import tempfile

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import itertools

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import collections

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import codecs

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import dbus

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import dbus.service

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from gi.repository import GLib

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import gobject

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import avahi

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from dbus.mainloop.glib import DBusGMainLoop

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import ctypes

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import ctypes.util

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import xml.dom.minidom

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import inspect

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# Try to find the value of SO_BINDTODEVICE:

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try:

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# This is where SO_BINDTODEVICE is in Python 3.3 (or 3.4?) and

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# newer, and it is also the most natural place for it:

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SO_BINDTODEVICE = socket.SO_BINDTODEVICE

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except AttributeError:

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try:

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# This is where SO_BINDTODEVICE was up to and including Python

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# 2.6, and also 3.2:

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from IN import SO_BINDTODEVICE

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except ImportError:

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

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# Try running the C preprocessor:

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try:

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cc = subprocess.Popen(["cc", "--language=c", "-E",

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"/dev/stdin"],

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stdin=subprocess.PIPE,

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stdout=subprocess.PIPE)

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stdout = cc.communicate(

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

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

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except (OSError, ValueError, IndexError):

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# No value found

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SO_BINDTODEVICE = None

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if sys.version_info.major == 2:

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str = unicode

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version = "1.7.10"

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stored_state_file = "clients.pickle"

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logger = logging.getLogger()

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syslogger = None

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try:

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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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with contextlib.closing(socket.socket()) as s:

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ifreq = fcntl.ioctl(s, SIOCGIFINDEX,

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struct.pack(b"16s16x", interface))

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interface_index = struct.unpack("I", ifreq[16:20])[0]

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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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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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' [%(process)d]:'

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' %(levelname)s:'

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' %(message)s'))

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logger.addHandler(console)

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logger.setLevel(level)

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class PGPError(Exception):

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"""Exception if encryption/decryption fails"""

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pass

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class PGPEngine(object):

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

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def __init__(self):

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

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self.gpg = "gpg"

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try:

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

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for line in output.splitlines():

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

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if name == "gpg":

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self.gpg = path

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break

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except OSError as e:

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if e.errno != errno.ENOENT:

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raise

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self.gnupgargs = ['--batch',

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'--homedir', self.tempdir,

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'--force-mdc',

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'--quiet']

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

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

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

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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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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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os.rmdir(os.path.join(root, dirname))

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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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encoded = b"mandos" + binascii.hexlify(password)

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if len(encoded) > 2048:

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# GnuPG can't handle long passwords, so encode differently

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encoded = (b"mandos" + password.replace(b"\\", b"\\\\")

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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()

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

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'--passphrase-file',

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passfile.name]

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+ self.gnupgargs,

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stdin = subprocess.PIPE,

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stdout = subprocess.PIPE,

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stderr = subprocess.PIPE)

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

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if proc.returncode != 0:

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raise PGPError(err)

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return ciphertext

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def decrypt(self, data, password):

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passphrase = self.password_encode(password)

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with tempfile.NamedTemporaryFile(

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dir = self.tempdir) as passfile:

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passfile.write(passphrase)

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passfile.flush()

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

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'--passphrase-file',

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passfile.name]

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+ self.gnupgargs,

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stdin = subprocess.PIPE,

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stdout = subprocess.PIPE,

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stderr = subprocess.PIPE)

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

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if proc.returncode != 0:

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raise PGPError(err)

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return decrypted_plaintext

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# 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.

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

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

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

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PROTO_INET = 0 # avahi-common/address.h

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PROTO_INET6 = 1 # avahi-common/address.h

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DBUS_NAME = "org.freedesktop.Avahi"

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DBUS_INTERFACE_ENTRY_GROUP = DBUS_NAME + ".EntryGroup"

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DBUS_INTERFACE_SERVER = DBUS_NAME + ".Server"

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DBUS_PATH_SERVER = "/"

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def string_array_to_txt_array(self, t):

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

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

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ENTRY_GROUP_ESTABLISHED = 2 # avahi-common/defs.h

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ENTRY_GROUP_COLLISION = 3 # avahi-common/defs.h

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ENTRY_GROUP_FAILURE = 4 # avahi-common/defs.h

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SERVER_INVALID = 0 # avahi-common/defs.h

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SERVER_REGISTERING = 1 # avahi-common/defs.h

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SERVER_RUNNING = 2 # avahi-common/defs.h

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SERVER_COLLISION = 3 # avahi-common/defs.h

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SERVER_FAILURE = 4 # avahi-common/defs.h

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avahi = Avahi()

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SO_BINDTODEVICE = None

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version = "1.3.1"

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#logger = logging.getLogger('mandos')

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logger = logging.Logger('mandos')

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syslogger = (logging.handlers.SysLogHandler

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(facility = logging.handlers.SysLogHandler.LOG_DAEMON,

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address = str("/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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console = logging.StreamHandler()

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console.setFormatter(logging.Formatter('%(name)s [%(process)d]:'

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' %(levelname)s:'

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' %(message)s'))

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logger.addHandler(console)

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103

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class AvahiError(Exception):

301

105

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

302

106

self.value = value

303

return super(AvahiError, self).__init__(value, *args,

304

**kwargs)

305

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super(AvahiError, self).__init__(value, *args, **kwargs)

108

def __unicode__(self):

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return unicode(repr(self.value))

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307

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class AvahiServiceError(AvahiError):

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pass

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class AvahiGroupError(AvahiError):

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pass

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Used to optionally bind to the specified interface.

321

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name: string; Example: 'Mandos'

322

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type: string; Example: '_mandos._tcp'.

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See <https://www.iana.org/assignments/service-names-port-numbers>

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See <http://www.dns-sd.org/ServiceTypes.html>

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port: integer; what port to announce

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TXT: list of strings; TXT record for the service

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domain: string; Domain to publish on, default to .local if empty.

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135

server: D-Bus Server

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bus: dbus.SystemBus()

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"""

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def __init__(self,

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interface = avahi.IF_UNSPEC,

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name = None,

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servicetype = None,

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port = None,

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TXT = None,

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domain = "",

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host = "",

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max_renames = 32768,

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protocol = avahi.PROTO_UNSPEC,

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bus = None):

138

def __init__(self, interface = avahi.IF_UNSPEC, name = None,

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servicetype = None, port = None, TXT = None,

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domain = "", host = "", max_renames = 32768,

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protocol = avahi.PROTO_UNSPEC, bus = None):

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142

self.interface = interface

348

143

self.name = name

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144

self.type = servicetype

358

153

self.server = None

359

154

self.bus = bus

360

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self.entry_group_state_changed_match = None

361

362

def rename(self, remove=True):

156

def rename(self):

363

157

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

364

158

if self.rename_count >= self.max_renames:

365

159

logger.critical("No suitable Zeroconf service name found"

366

160

" after %i retries, exiting.",

367

161

self.rename_count)

368

162

raise AvahiServiceError("Too many renames")

369

self.name = str(

370

self.server.GetAlternativeServiceName(self.name))

371

self.rename_count += 1

163

self.name = unicode(self.server.GetAlternativeServiceName(self.name))

372

164

logger.info("Changing Zeroconf service name to %r ...",

373

165

self.name)

374

if remove:

375

self.remove()

166

syslogger.setFormatter(logging.Formatter

167

('Mandos (%s) [%%(process)d]:'

168

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

169

% self.name))

170

self.remove()

376

171

try:

377

172

self.add()

378

173

except dbus.exceptions.DBusException as error:

379

if (error.get_dbus_name()

380

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

381

logger.info("Local Zeroconf service name collision.")

382

return self.rename(remove=False)

383

else:

384

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

385

self.cleanup()

386

os._exit(1)

387

174

logger.critical("DBusException: %s", error)

175

self.cleanup()

176

os._exit(1)

177

self.rename_count += 1

388

178

def remove(self):

389

179

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

390

180

if self.entry_group_state_changed_match is not None:

392

182

self.entry_group_state_changed_match = None

393

183

if self.group is not None:

394

184

self.group.Reset()

395

396

185

def add(self):

397

186

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

398

187

self.remove()

403

192

avahi.DBUS_INTERFACE_ENTRY_GROUP)

404

193

self.entry_group_state_changed_match = (

405

194

self.group.connect_to_signal(

406

'StateChanged', self.entry_group_state_changed))

195

'StateChanged', self .entry_group_state_changed))

407

196

logger.debug("Adding Zeroconf service '%s' of type '%s' ...",

408

197

self.name, self.type)

409

198

self.group.AddService(

415

204

dbus.UInt16(self.port),

416

205

avahi.string_array_to_txt_array(self.TXT))

417

206

self.group.Commit()

418

419

207

def entry_group_state_changed(self, state, error):

420

208

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

421

209

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

427

215

self.rename()

428

216

elif state == avahi.ENTRY_GROUP_FAILURE:

429

217

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

430

str(error))

431

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

432

218

unicode(error))

219

raise AvahiGroupError("State changed: %s"

220

% unicode(error))

433

221

def cleanup(self):

434

222

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

435

223

if self.group is not None:

436

224

try:

437

225

self.group.Free()

438

226

except (dbus.exceptions.UnknownMethodException,

439

dbus.exceptions.DBusException):

227

dbus.exceptions.DBusException) as e:

440

228

pass

441

229

self.group = None

442

230

self.remove()

443

444

231

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

445

232

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

446

233

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

447

bad_states = {

448

avahi.SERVER_INVALID: "Zeroconf server invalid",

449

avahi.SERVER_REGISTERING: None,

450

avahi.SERVER_COLLISION: "Zeroconf server name collision",

451

avahi.SERVER_FAILURE: "Zeroconf server failure",

452

}

234

bad_states = { avahi.SERVER_INVALID:

235

"Zeroconf server invalid",

236

avahi.SERVER_REGISTERING: None,

237

avahi.SERVER_COLLISION:

238

"Zeroconf server name collision",

239

avahi.SERVER_FAILURE:

240

"Zeroconf server failure" }

453

241

if state in bad_states:

454

242

if bad_states[state] is not None:

455

243

if error is None:

458

246

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

459

247

self.cleanup()

460

248

elif state == avahi.SERVER_RUNNING:

461

try:

462

self.add()

463

except dbus.exceptions.DBusException as error:

464

if (error.get_dbus_name()

465

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

466

logger.info("Local Zeroconf service name"

467

" collision.")

468

return self.rename(remove=False)

469

else:

470

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

471

self.cleanup()

472

os._exit(1)

249

self.add()

473

250

else:

474

251

if error is None:

475

252

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

476

253

else:

477

254

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

478

479

255

def activate(self):

480

256

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

481

257

if self.server is None:

485

261

follow_name_owner_changes=True),

486

262

avahi.DBUS_INTERFACE_SERVER)

487

263

self.server.connect_to_signal("StateChanged",

488

self.server_state_changed)

264

self.server_state_changed)

489

265

self.server_state_changed(self.server.GetState())

490

266

491

267

492

class AvahiServiceToSyslog(AvahiService):

493

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

494

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

495

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

496

syslogger.setFormatter(logging.Formatter(

497

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

498

.format(self.name)))

499

return ret

500

501

# Pretend that we have a GnuTLS module

502

class GnuTLS(object):

503

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

504

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

505

506

_library = ctypes.cdll.LoadLibrary(

507

ctypes.util.find_library("gnutls"))

508

_need_version = b"3.3.0"

509

def __init__(self):

510

# Need to use class name "GnuTLS" here, since this method is

511

# called before the assignment to the "gnutls" global variable

512

# happens.

513

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

514

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

515

.format(self._need_version))

516

517

# Unless otherwise indicated, the constants and types below are

518

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

519

520

# Constants

521

E_SUCCESS = 0

522

E_INTERRUPTED = -52

523

E_AGAIN = -28

524

CRT_OPENPGP = 2

525

CLIENT = 2

526

SHUT_RDWR = 0

527

CRD_CERTIFICATE = 1

528

E_NO_CERTIFICATE_FOUND = -49

529

OPENPGP_FMT_RAW = 0 # gnutls/openpgp.h

530

531

# Types

532

class session_int(ctypes.Structure):

533

_fields_ = []

534

session_t = ctypes.POINTER(session_int)

535

class certificate_credentials_st(ctypes.Structure):

536

_fields_ = []

537

certificate_credentials_t = ctypes.POINTER(

538

certificate_credentials_st)

539

certificate_type_t = ctypes.c_int

540

class datum_t(ctypes.Structure):

541

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

542

('size', ctypes.c_uint)]

543

class openpgp_crt_int(ctypes.Structure):

544

_fields_ = []

545

openpgp_crt_t = ctypes.POINTER(openpgp_crt_int)

546

openpgp_crt_fmt_t = ctypes.c_int # gnutls/openpgp.h

547

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

548

credentials_type_t = ctypes.c_int

549

transport_ptr_t = ctypes.c_void_p

550

close_request_t = ctypes.c_int

551

552

# Exceptions

553

class Error(Exception):

554

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

555

# exception might be raised from within GnuTLS.__init__,

556

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

557

# global variable has happened.

558

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

559

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

560

# code is passed, convert it to a string with

561

# gnutls.strerror()

562

self.code = code

563

if message is None and code is not None:

564

message = GnuTLS.strerror(code)

565

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

566

message, *args)

567

568

class CertificateSecurityError(Error):

569

pass

570

571

# Classes

572

class Credentials(object):

573

def __init__(self):

574

self._c_object = gnutls.certificate_credentials_t()

575

gnutls.certificate_allocate_credentials(

576

ctypes.byref(self._c_object))

577

self.type = gnutls.CRD_CERTIFICATE

578

579

def __del__(self):

580

gnutls.certificate_free_credentials(self._c_object)

581

582

class ClientSession(object):

583

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

584

self._c_object = gnutls.session_t()

585

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

586

gnutls.set_default_priority(self._c_object)

587

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

588

gnutls.handshake_set_private_extensions(self._c_object,

589

True)

590

self.socket = socket

591

if credentials is None:

592

credentials = gnutls.Credentials()

593

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

594

ctypes.cast(credentials._c_object,

595

ctypes.c_void_p))

596

self.credentials = credentials

597

598

def __del__(self):

599

gnutls.deinit(self._c_object)

600

601

def handshake(self):

602

return gnutls.handshake(self._c_object)

603

604

def send(self, data):

605

data = bytes(data)

606

data_len = len(data)

607

while data_len > 0:

608

data_len -= gnutls.record_send(self._c_object,

609

data[-data_len:],

610

data_len)

611

612

def bye(self):

613

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

614

615

# Error handling functions

616

def _error_code(result):

617

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

618

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

619

if result >= 0:

620

return result

621

if result == gnutls.E_NO_CERTIFICATE_FOUND:

622

raise gnutls.CertificateSecurityError(code = result)

623

raise gnutls.Error(code = result)

624

625

def _retry_on_error(result, func, arguments):

626

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

627

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

628

while result < 0:

629

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

630

return _error_code(result)

631

result = func(*arguments)

632

return result

633

634

# Unless otherwise indicated, the function declarations below are

635

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

636

637

# Functions

638

priority_set_direct = _library.gnutls_priority_set_direct

639

priority_set_direct.argtypes = [session_t, ctypes.c_char_p,

640

ctypes.POINTER(ctypes.c_char_p)]

641

priority_set_direct.restype = _error_code

642

643

init = _library.gnutls_init

644

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

645

init.restype = _error_code

646

647

set_default_priority = _library.gnutls_set_default_priority

648

set_default_priority.argtypes = [session_t]

649

set_default_priority.restype = _error_code

650

651

record_send = _library.gnutls_record_send

652

record_send.argtypes = [session_t, ctypes.c_void_p,

653

ctypes.c_size_t]

654

record_send.restype = ctypes.c_ssize_t

655

record_send.errcheck = _retry_on_error

656

657

certificate_allocate_credentials = (

658

_library.gnutls_certificate_allocate_credentials)

659

certificate_allocate_credentials.argtypes = [

660

ctypes.POINTER(certificate_credentials_t)]

661

certificate_allocate_credentials.restype = _error_code

662

663

certificate_free_credentials = (

664

_library.gnutls_certificate_free_credentials)

665

certificate_free_credentials.argtypes = [certificate_credentials_t]

666

certificate_free_credentials.restype = None

667

668

handshake_set_private_extensions = (

669

_library.gnutls_handshake_set_private_extensions)

670

handshake_set_private_extensions.argtypes = [session_t,

671

ctypes.c_int]

672

handshake_set_private_extensions.restype = None

673

674

credentials_set = _library.gnutls_credentials_set

675

credentials_set.argtypes = [session_t, credentials_type_t,

676

ctypes.c_void_p]

677

credentials_set.restype = _error_code

678

679

strerror = _library.gnutls_strerror

680

strerror.argtypes = [ctypes.c_int]

681

strerror.restype = ctypes.c_char_p

682

683

certificate_type_get = _library.gnutls_certificate_type_get

684

certificate_type_get.argtypes = [session_t]

685

certificate_type_get.restype = _error_code

686

687

certificate_get_peers = _library.gnutls_certificate_get_peers

688

certificate_get_peers.argtypes = [session_t,

689

ctypes.POINTER(ctypes.c_uint)]

690

certificate_get_peers.restype = ctypes.POINTER(datum_t)

691

692

global_set_log_level = _library.gnutls_global_set_log_level

693

global_set_log_level.argtypes = [ctypes.c_int]

694

global_set_log_level.restype = None

695

696

global_set_log_function = _library.gnutls_global_set_log_function

697

global_set_log_function.argtypes = [log_func]

698

global_set_log_function.restype = None

699

700

deinit = _library.gnutls_deinit

701

deinit.argtypes = [session_t]

702

deinit.restype = None

703

704

handshake = _library.gnutls_handshake

705

handshake.argtypes = [session_t]

706

handshake.restype = _error_code

707

handshake.errcheck = _retry_on_error

708

709

transport_set_ptr = _library.gnutls_transport_set_ptr

710

transport_set_ptr.argtypes = [session_t, transport_ptr_t]

711

transport_set_ptr.restype = None

712

713

bye = _library.gnutls_bye

714

bye.argtypes = [session_t, close_request_t]

715

bye.restype = _error_code

716

bye.errcheck = _retry_on_error

717

718

check_version = _library.gnutls_check_version

719

check_version.argtypes = [ctypes.c_char_p]

720

check_version.restype = ctypes.c_char_p

721

722

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

723

724

openpgp_crt_init = _library.gnutls_openpgp_crt_init

725

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

726

openpgp_crt_init.restype = _error_code

727

728

openpgp_crt_import = _library.gnutls_openpgp_crt_import

729

openpgp_crt_import.argtypes = [openpgp_crt_t,

730

ctypes.POINTER(datum_t),

731

openpgp_crt_fmt_t]

732

openpgp_crt_import.restype = _error_code

733

734

openpgp_crt_verify_self = _library.gnutls_openpgp_crt_verify_self

735

openpgp_crt_verify_self.argtypes = [openpgp_crt_t, ctypes.c_uint,

736

ctypes.POINTER(ctypes.c_uint)]

737

openpgp_crt_verify_self.restype = _error_code

738

739

openpgp_crt_deinit = _library.gnutls_openpgp_crt_deinit

740

openpgp_crt_deinit.argtypes = [openpgp_crt_t]

741

openpgp_crt_deinit.restype = None

742

743

openpgp_crt_get_fingerprint = (

744

_library.gnutls_openpgp_crt_get_fingerprint)

745

openpgp_crt_get_fingerprint.argtypes = [openpgp_crt_t,

746

ctypes.c_void_p,

747

ctypes.POINTER(

748

ctypes.c_size_t)]

749

openpgp_crt_get_fingerprint.restype = _error_code

750

751

# Remove non-public functions

752

del _error_code, _retry_on_error

753

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

754

gnutls = GnuTLS()

755

756

def call_pipe(connection, # : multiprocessing.Connection

757

func, *args, **kwargs):

758

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

759

760

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

761

return value on the provided multiprocessing.Connection.

762

"""

763

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

764

connection.close()

765

268

def _timedelta_to_milliseconds(td):

269

"Convert a datetime.timedelta() to milliseconds"

270

return ((td.days * 24 * 60 * 60 * 1000)

271

+ (td.seconds * 1000)

272

+ (td.microseconds // 1000))

273

766

274

class Client(object):

767

275

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

768

276

769

277

Attributes:

770

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

278

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

771

279

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

772

280

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

773

281

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

774

282

to see if the client lives.

775

283

'None' if no process is running.

776

checker_callback_tag: a GLib event source tag, or None

284

checker_callback_tag: a gobject event source tag, or None

777

285

checker_command: string; External command which is run to check

778

286

if client lives. %() expansions are done at

779

287

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

780

288

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

781

checker_initiator_tag: a GLib event source tag, or None

289

checker_initiator_tag: a gobject event source tag, or None

782

290

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

783

client_structure: Object describing what attributes a client has

784

and is used for storing the client at exit

785

291

current_checker_command: string; current running checker_command

786

disable_initiator_tag: a GLib event source tag, or None

292

disable_hook: If set, called by disable() as disable_hook(self)

293

disable_initiator_tag: a gobject event source tag, or None

787

294

enabled: bool()

788

295

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

789

296

uniquely identify the client

791

298

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

792

299

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

793

300

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

794

last_checker_status: integer between 0 and 255 reflecting exit

795

status of last checker. -1 reflects crashed

796

checker, -2 means no checker completed yet.

797

last_checker_signal: The signal which killed the last checker, if

798

last_checker_status is -1

799

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

301

last_enabled: datetime.datetime(); (UTC)

800

302

name: string; from the config file, used in log messages and

801

303

D-Bus identifiers

802

304

secret: bytestring; sent verbatim (over TLS) to client

803

305

timeout: datetime.timedelta(); How long from last_checked_ok

804

306

until this client is disabled

805

extended_timeout: extra long timeout when secret has been sent

307

extended_timeout: extra long timeout when password has been sent

806

308

runtime_expansions: Allowed attributes for runtime expansion.

807

309

expires: datetime.datetime(); time (UTC) when a client will be

808

310

disabled, or None

809

server_settings: The server_settings dict from main()

810

311

"""

811

312

812

313

runtime_expansions = ("approval_delay", "approval_duration",

813

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

814

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

815

"last_approval_request", "last_checked_ok",

314

"created", "enabled", "fingerprint",

315

"host", "interval", "last_checked_ok",

816

316

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

817

client_defaults = {

818

"timeout": "PT5M",

819

"extended_timeout": "PT15M",

820

"interval": "PT2M",

821

"checker": "fping -q -- %%(host)s",

822

"host": "",

823

"approval_delay": "PT0S",

824

"approval_duration": "PT1S",

825

"approved_by_default": "True",

826

"enabled": "True",

827

}

828

829

@staticmethod

830

def config_parser(config):

831

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

832

{ client_name: {setting_name: value, ...}, ...}

833

with exceptions for any special settings as defined above.

834

NOTE: Must be a pure function. Must return the same result

835

value given the same arguments.

836

"""

837

settings = {}

838

for client_name in config.sections():

839

section = dict(config.items(client_name))

840

client = settings[client_name] = {}

841

842

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

843

# Reformat values from string types to Python types

844

client["approved_by_default"] = config.getboolean(

845

client_name, "approved_by_default")

846

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

847

"enabled")

848

849

# Uppercase and remove spaces from fingerprint for later

850

# comparison purposes with return value from the

851

# fingerprint() function

852

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

853

.replace(" ", ""))

854

if "secret" in section:

855

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

856

.encode("utf-8"),

857

"base64")

858

elif "secfile" in section:

859

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

860

(section["secfile"])),

861

"rb") as secfile:

862

client["secret"] = secfile.read()

863

else:

864

raise TypeError("No secret or secfile for section {}"

865

.format(section))

866

client["timeout"] = string_to_delta(section["timeout"])

867

client["extended_timeout"] = string_to_delta(

868

section["extended_timeout"])

869

client["interval"] = string_to_delta(section["interval"])

870

client["approval_delay"] = string_to_delta(

871

section["approval_delay"])

872

client["approval_duration"] = string_to_delta(

873

section["approval_duration"])

874

client["checker_command"] = section["checker"]

875

client["last_approval_request"] = None

876

client["last_checked_ok"] = None

877

client["last_checker_status"] = -2

878

879

return settings

880

881

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

317

318

def timeout_milliseconds(self):

319

"Return the 'timeout' attribute in milliseconds"

320

return _timedelta_to_milliseconds(self.timeout)

321

322

def extended_timeout_milliseconds(self):

323

"Return the 'extended_timeout' attribute in milliseconds"

324

return _timedelta_to_milliseconds(self.extended_timeout)

325

326

def interval_milliseconds(self):

327

"Return the 'interval' attribute in milliseconds"

328

return _timedelta_to_milliseconds(self.interval)

329

330

def approval_delay_milliseconds(self):

331

return _timedelta_to_milliseconds(self.approval_delay)

332

333

def __init__(self, name = None, disable_hook=None, config=None):

334

"""Note: the 'checker' key in 'config' sets the

335

'checker_command' attribute and *not* the 'checker'

336

attribute."""

882

337

self.name = name

883

if server_settings is None:

884

server_settings = {}

885

self.server_settings = server_settings

886

# adding all client settings

887

for setting, value in settings.items():

888

setattr(self, setting, value)

889

890

if self.enabled:

891

if not hasattr(self, "last_enabled"):

892

self.last_enabled = datetime.datetime.utcnow()

893

if not hasattr(self, "expires"):

894

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

895

+ self.timeout)

896

else:

897

self.last_enabled = None

898

self.expires = None

899

338

if config is None:

339

config = {}

900

340

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

341

# Uppercase and remove spaces from fingerprint for later

342

# comparison purposes with return value from the fingerprint()

343

# function

344

self.fingerprint = (config["fingerprint"].upper()

345

.replace(" ", ""))

901

346

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

902

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

903

datetime.datetime.utcnow())

904

905

# attributes specific for this server instance

347

if "secret" in config:

348

self.secret = config["secret"].decode("base64")

349

elif "secfile" in config:

350

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

351

(config["secfile"])),

352

"rb") as secfile:

353

self.secret = secfile.read()

354

else:

355

raise TypeError("No secret or secfile for client %s"

356

% self.name)

357

self.host = config.get("host", "")

358

self.created = datetime.datetime.utcnow()

359

self.enabled = False

360

self.last_approval_request = None

361

self.last_enabled = None

362

self.last_checked_ok = None

363

self.timeout = string_to_delta(config["timeout"])

364

self.extended_timeout = string_to_delta(config["extended_timeout"])

365

self.interval = string_to_delta(config["interval"])

366

self.disable_hook = disable_hook

906

367

self.checker = None

907

368

self.checker_initiator_tag = None

908

369

self.disable_initiator_tag = None

370

self.expires = None

909

371

self.checker_callback_tag = None

372

self.checker_command = config["checker"]

910

373

self.current_checker_command = None

911

self.approved = None

374

self.last_connect = None

375

self._approved = None

376

self.approved_by_default = config.get("approved_by_default",

377

True)

912

378

self.approvals_pending = 0

913

self.changedstate = multiprocessing_manager.Condition(

914

multiprocessing_manager.Lock())

915

self.client_structure = [attr

916

for attr in self.__dict__.keys()

917

if not attr.startswith("_")]

918

self.client_structure.append("client_structure")

919

920

for name, t in inspect.getmembers(

921

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

922

if not name.startswith("_"):

923

self.client_structure.append(name)

379

self.approval_delay = string_to_delta(

380

config["approval_delay"])

381

self.approval_duration = string_to_delta(

382

config["approval_duration"])

383

self.changedstate = multiprocessing_manager.Condition(multiprocessing_manager.Lock())

924

384

925

# Send notice to process children that client state has changed

926

385

def send_changedstate(self):

927

with self.changedstate:

928

self.changedstate.notify_all()

929

386

self.changedstate.acquire()

387

self.changedstate.notify_all()

388

self.changedstate.release()

389

930

390

def enable(self):

931

391

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

932

392

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

933

393

# Already enabled

934

394

return

395

self.send_changedstate()

396

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

397

# and every interval from then on.

398

self.checker_initiator_tag = (gobject.timeout_add

399

(self.interval_milliseconds(),

400

self.start_checker))

401

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

935

402

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

403

self.disable_initiator_tag = (gobject.timeout_add

404

(self.timeout_milliseconds(),

405

self.disable))

936

406

self.enabled = True

937

407

self.last_enabled = datetime.datetime.utcnow()

938

self.init_checker()

939

self.send_changedstate()

408

# Also start a new checker *right now*.

409

self.start_checker()

940

410

941

411

def disable(self, quiet=True):

942

412

"""Disable this client."""

943

413

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

944

414

return False

945

415

if not quiet:

416

self.send_changedstate()

417

if not quiet:

946

418

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

947

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

948

GLib.source_remove(self.disable_initiator_tag)

419

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

420

gobject.source_remove(self.disable_initiator_tag)

949

421

self.disable_initiator_tag = None

950

422

self.expires = None

951

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

952

GLib.source_remove(self.checker_initiator_tag)

423

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

424

gobject.source_remove(self.checker_initiator_tag)

953

425

self.checker_initiator_tag = None

954

426

self.stop_checker()

427

if self.disable_hook:

428

self.disable_hook(self)

955

429

self.enabled = False

956

if not quiet:

957

self.send_changedstate()

958

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

430

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

959

431

return False

960

432

961

433

def __del__(self):

434

self.disable_hook = None

962

435

self.disable()

963

436

964

def init_checker(self):

965

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

966

# and every interval from then on.

967

if self.checker_initiator_tag is not None:

968

GLib.source_remove(self.checker_initiator_tag)

969

self.checker_initiator_tag = GLib.timeout_add(

970

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

971

self.start_checker)

972

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

973

if self.disable_initiator_tag is not None:

974

GLib.source_remove(self.disable_initiator_tag)

975

self.disable_initiator_tag = GLib.timeout_add(

976

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

977

# Also start a new checker *right now*.

978

self.start_checker()

979

980

def checker_callback(self, source, condition, connection,

981

command):

437

def checker_callback(self, pid, condition, command):

982

438

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

983

439

self.checker_callback_tag = None

984

440

self.checker = None

985

# Read return code from connection (see call_pipe)

986

returncode = connection.recv()

987

connection.close()

988

989

if returncode >= 0:

990

self.last_checker_status = returncode

991

self.last_checker_signal = None

992

if self.last_checker_status == 0:

441

if os.WIFEXITED(condition):

442

exitstatus = os.WEXITSTATUS(condition)

443

if exitstatus == 0:

993

444

logger.info("Checker for %(name)s succeeded",

994

445

vars(self))

995

446

self.checked_ok()

996

447

else:

997

logger.info("Checker for %(name)s failed", vars(self))

448

logger.info("Checker for %(name)s failed",

449

vars(self))

998

450

else:

999

self.last_checker_status = -1

1000

self.last_checker_signal = -returncode

1001

451

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

1002

452

vars(self))

1003

return False

1004

1005

def checked_ok(self):

1006

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

1007

self.last_checked_ok = datetime.datetime.utcnow()

1008

self.last_checker_status = 0

1009

self.last_checker_signal = None

1010

self.bump_timeout()

1011

1012

def bump_timeout(self, timeout=None):

1013

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

453

454

def checked_ok(self, timeout=None):

455

"""Bump up the timeout for this client.

456

457

This should only be called when the client has been seen,

458

alive and well.

459

"""

1014

460

if timeout is None:

1015

461

timeout = self.timeout

1016

if self.disable_initiator_tag is not None:

1017

GLib.source_remove(self.disable_initiator_tag)

1018

self.disable_initiator_tag = None

1019

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

1020

self.disable_initiator_tag = GLib.timeout_add(

1021

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

1022

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

462

self.last_checked_ok = datetime.datetime.utcnow()

463

gobject.source_remove(self.disable_initiator_tag)

464

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

465

self.disable_initiator_tag = (gobject.timeout_add

466

(_timedelta_to_milliseconds(timeout),

467

self.disable))

1023

468

1024

469

def need_approval(self):

1025

470

self.last_approval_request = datetime.datetime.utcnow()

1030

475

If a checker already exists, leave it running and do

1031

476

nothing."""

1032

477

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

1033

# did that, and if a checker (for some reason) started running

1034

# slowly and taking more than 'interval' time, then the client

1035

# would inevitably timeout, since no checker would get a

1036

# chance to run to completion. If we instead leave running

478

# did that, then if a checker (for some reason) started

479

# running slowly and taking more than 'interval' time, the

480

# client would inevitably timeout, since no checker would get

481

# a chance to run to completion. If we instead leave running

1037

482

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

1038

483

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

1039

484

# should be.

1040

485

1041

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

1042

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

1043

self.checker.join()

1044

self.checker = None

486

# If a checker exists, make sure it is not a zombie

487

try:

488

pid, status = os.waitpid(self.checker.pid, os.WNOHANG)

489

except (AttributeError, OSError) as error:

490

if (isinstance(error, OSError)

491

and error.errno != errno.ECHILD):

492

raise error

493

else:

494

if pid:

495

logger.warning("Checker was a zombie")

496

gobject.source_remove(self.checker_callback_tag)

497

self.checker_callback(pid, status,

498

self.current_checker_command)

1045

499

# Start a new checker if needed

1046

500

if self.checker is None:

1047

# Escape attributes for the shell

1048

escaped_attrs = {

1049

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

1050

for attr in self.runtime_expansions }

1051

501

try:

1052

command = self.checker_command % escaped_attrs

1053

except TypeError as error:

1054

logger.error('Could not format string "%s"',

1055

self.checker_command,

1056

exc_info=error)

1057

return True # Try again later

502

# In case checker_command has exactly one % operator

503

command = self.checker_command % self.host

504

except TypeError:

505

# Escape attributes for the shell

506

escaped_attrs = dict(

507

(attr,

508

re.escape(unicode(str(getattr(self, attr, "")),

509

errors=

510

'replace')))

511

for attr in

512

self.runtime_expansions)

513

514

try:

515

command = self.checker_command % escaped_attrs

516

except TypeError as error:

517

logger.error('Could not format string "%s":'

518

' %s', self.checker_command, error)

519

return True # Try again later

1058

520

self.current_checker_command = command

1059

logger.info("Starting checker %r for %s", command,

1060

self.name)

1061

# We don't need to redirect stdout and stderr, since

1062

# in normal mode, that is already done by daemon(),

1063

# and in debug mode we don't want to. (Stdin is

1064

# always replaced by /dev/null.)

1065

# The exception is when not debugging but nevertheless

1066

# running in the foreground; use the previously

1067

# created wnull.

1068

popen_args = { "close_fds": True,

1069

"shell": True,

1070

"cwd": "/" }

1071

if (not self.server_settings["debug"]

1072

and self.server_settings["foreground"]):

1073

popen_args.update({"stdout": wnull,

1074

"stderr": wnull })

1075

pipe = multiprocessing.Pipe(duplex = False)

1076

self.checker = multiprocessing.Process(

1077

target = call_pipe,

1078

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

1079

kwargs = popen_args)

1080

self.checker.start()

1081

self.checker_callback_tag = GLib.io_add_watch(

1082

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

1083

self.checker_callback, pipe[0], command)

1084

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

521

try:

522

logger.info("Starting checker %r for %s",

523

command, self.name)

524

# We don't need to redirect stdout and stderr, since

525

# in normal mode, that is already done by daemon(),

526

# and in debug mode we don't want to. (Stdin is

527

# always replaced by /dev/null.)

528

self.checker = subprocess.Popen(command,

529

close_fds=True,

530

shell=True, cwd="/")

531

self.checker_callback_tag = (gobject.child_watch_add

532

(self.checker.pid,

533

self.checker_callback,

534

data=command))

535

# The checker may have completed before the gobject

536

# watch was added. Check for this.

537

pid, status = os.waitpid(self.checker.pid, os.WNOHANG)

538

if pid:

539

gobject.source_remove(self.checker_callback_tag)

540

self.checker_callback(pid, status, command)

541

except OSError as error:

542

logger.error("Failed to start subprocess: %s",

543

error)

544

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

1085

545

return True

1086

546

1087

547

def stop_checker(self):

1088

548

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

1089

549

if self.checker_callback_tag:

1090

GLib.source_remove(self.checker_callback_tag)

550

gobject.source_remove(self.checker_callback_tag)

1091

551

self.checker_callback_tag = None

1092

552

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

1093

553

return

1094

554

logger.debug("Stopping checker for %(name)s", vars(self))

1095

self.checker.terminate()

555

try:

556

os.kill(self.checker.pid, signal.SIGTERM)

557

#time.sleep(0.5)

558

#if self.checker.poll() is None:

559

# os.kill(self.checker.pid, signal.SIGKILL)

560

except OSError as error:

561

if error.errno != errno.ESRCH: # No such process

562

raise

1096

563

self.checker = None

1097

564

1098

565

1099

def dbus_service_property(dbus_interface,

1100

signature="v",

1101

access="readwrite",

1102

byte_arrays=False):

566

def dbus_service_property(dbus_interface, signature="v",

567

access="readwrite", byte_arrays=False):

1103

568

"""Decorators for marking methods of a DBusObjectWithProperties to

1104

569

become properties on the D-Bus.

1105

570

1114

579

# "Set" method, so we fail early here:

1115

580

if byte_arrays and signature != "ay":

1116

581

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

1117

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

1118

582

" signature %r" % signature)

1119

583

def decorator(func):

1120

584

func._dbus_is_property = True

1121

585

func._dbus_interface = dbus_interface

1126

590

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

1127

591

func._dbus_get_args_options = {'byte_arrays': byte_arrays }

1128

592

return func

1129

1130

return decorator

1131

1132

1133

def dbus_interface_annotations(dbus_interface):

1134

"""Decorator for marking functions returning interface annotations

1135

1136

Usage:

1137

1138

@dbus_interface_annotations("org.example.Interface")

1139

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

1140

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

1141

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

1142

"false"}

1143

"""

1144

1145

def decorator(func):

1146

func._dbus_is_interface = True

1147

func._dbus_interface = dbus_interface

1148

func._dbus_name = dbus_interface

1149

return func

1150

1151

return decorator

1152

1153

1154

def dbus_annotations(annotations):

1155

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

1156

Usage:

1157

1158

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

1159

"org.freedesktop.DBus.Property."

1160

"EmitsChangedSignal": "false"})

1161

@dbus_service_property("org.example.Interface", signature="b",

1162

access="r")

1163

def Property_dbus_property(self):

1164

return dbus.Boolean(False)

1165

1166

See also the DBusObjectWithAnnotations class.

1167

"""

1168

1169

def decorator(func):

1170

func._dbus_annotations = annotations

1171

return func

1172

1173

593

return decorator

1174

594

1175

595

1176

596

class DBusPropertyException(dbus.exceptions.DBusException):

1177

597

"""A base class for D-Bus property-related exceptions

1178

598

"""

1179

pass

599

def __unicode__(self):

600

return unicode(str(self))

1180

601

1181

602

1182

603

class DBusPropertyAccessException(DBusPropertyException):

1191

612

pass

1192

613

1193

614

1194

class DBusObjectWithAnnotations(dbus.service.Object):

1195

"""A D-Bus object with annotations.

1196

1197

Classes inheriting from this can use the dbus_annotations

1198

decorator to add annotations to methods or signals.

1199

"""

1200

1201

@staticmethod

1202

def _is_dbus_thing(thing):

1203

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

1204

1205

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

1206

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

1207

"""

1208

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

1209

False)

1210

1211

def _get_all_dbus_things(self, thing):

1212

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

1213

"""

1214

return ((getattr(athing.__get__(self), "_dbus_name", name),

1215

athing.__get__(self))

1216

for cls in self.__class__.__mro__

1217

for name, athing in

1218

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

1219

1220

@dbus.service.method(dbus.INTROSPECTABLE_IFACE,

1221

out_signature = "s",

1222

path_keyword = 'object_path',

1223

connection_keyword = 'connection')

1224

def Introspect(self, object_path, connection):

1225

"""Overloading of standard D-Bus method.

1226

1227

Inserts annotation tags on methods and signals.

1228

"""

1229

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

1230

connection)

1231

try:

1232

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

1233

1234

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

1235

# Add annotation tags

1236

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

1237

for tag in if_tag.getElementsByTagName(typ):

1238

annots = dict()

1239

for name, prop in (self.

1240

_get_all_dbus_things(typ)):

1241

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

1242

and prop._dbus_interface

1243

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

1244

annots.update(getattr(

1245

prop, "_dbus_annotations", {}))

1246

for name, value in annots.items():

1247

ann_tag = document.createElement(

1248

"annotation")

1249

ann_tag.setAttribute("name", name)

1250

ann_tag.setAttribute("value", value)

1251

tag.appendChild(ann_tag)

1252

# Add interface annotation tags

1253

for annotation, value in dict(

1254

itertools.chain.from_iterable(

1255

annotations().items()

1256

for name, annotations

1257

in self._get_all_dbus_things("interface")

1258

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

1259

)).items():

1260

ann_tag = document.createElement("annotation")

1261

ann_tag.setAttribute("name", annotation)

1262

ann_tag.setAttribute("value", value)

1263

if_tag.appendChild(ann_tag)

1264

# Fix argument name for the Introspect method itself

1265

if (if_tag.getAttribute("name")

1266

== dbus.INTROSPECTABLE_IFACE):

1267

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

1268

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

1269

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

1270

if (arg.getAttribute("direction")

1271

== "out"):

1272

arg.setAttribute("name",

1273

"xml_data")

1274

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

1275

document.unlink()

1276

except (AttributeError, xml.dom.DOMException,

1277

xml.parsers.expat.ExpatError) as error:

1278

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

1279

exc_info=error)

1280

return xmlstring

1281

1282

1283

class DBusObjectWithProperties(DBusObjectWithAnnotations):

615

class DBusObjectWithProperties(dbus.service.Object):

1284

616

"""A D-Bus object with properties.

1285

617

1286

618

Classes inheriting from this can use the dbus_service_property

1288

620

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

1289

621

"""

1290

622

623

@staticmethod

624

def _is_dbus_property(obj):

625

return getattr(obj, "_dbus_is_property", False)

626

627

def _get_all_dbus_properties(self):

628

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

629

"""

630

return ((prop.__get__(self)._dbus_name, prop.__get__(self))

631

for cls in self.__class__.__mro__

632

for name, prop in inspect.getmembers(cls, self._is_dbus_property))

633

1291

634

def _get_dbus_property(self, interface_name, property_name):

1292

635

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

1293

636

property with the specified name and interface.

1294

637

"""

1295

for cls in self.__class__.__mro__:

1296

for name, value in inspect.getmembers(

1297

cls, self._is_dbus_thing("property")):

1298

if (value._dbus_name == property_name

1299

and value._dbus_interface == interface_name):

638

for cls in self.__class__.__mro__:

639

for name, value in inspect.getmembers(cls, self._is_dbus_property):

640

if value._dbus_name == property_name and value._dbus_interface == interface_name:

1300

641

return value.__get__(self)

1301

642

1302

643

# No such property

1303

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

1304

self.dbus_object_path, interface_name, property_name))

1305

1306

@classmethod

1307

def _get_all_interface_names(cls):

1308

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

1309

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

1310

"_dbus_interface", None)

1311

for x in (inspect.getmro(cls))

1312

for attr in dir(x))

1313

if name is not None)

1314

1315

@dbus.service.method(dbus.PROPERTIES_IFACE,

1316

in_signature="ss",

644

raise DBusPropertyNotFound(self.dbus_object_path + ":"

645

+ interface_name + "."

646

+ property_name)

647

648

649

@dbus.service.method(dbus.PROPERTIES_IFACE, in_signature="ss",

1317

650

out_signature="v")

1318

651

def Get(self, interface_name, property_name):

1319

652

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

1337

670

# The byte_arrays option is not supported yet on

1338

671

# signatures other than "ay".

1339

672

if prop._dbus_signature != "ay":

1340

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

1341

"'ay' signature {!r}"

1342

.format(prop._dbus_signature))

1343

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

1344

for byte in value))

673

raise ValueError

674

value = dbus.ByteArray(''.join(unichr(byte)

675

for byte in value))

1345

676

prop(value)

1346

677

1347

@dbus.service.method(dbus.PROPERTIES_IFACE,

1348

in_signature="s",

678

@dbus.service.method(dbus.PROPERTIES_IFACE, in_signature="s",

1349

679

out_signature="a{sv}")

1350

680

def GetAll(self, interface_name):

1351

681

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

1353

683

1354

684

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

1355

685

"""

1356

properties = {}

1357

for name, prop in self._get_all_dbus_things("property"):

686

all = {}

687

for name, prop in self._get_all_dbus_properties():

1358

688

if (interface_name

1359

689

and interface_name != prop._dbus_interface):

1360

690

# Interface non-empty but did not match

1364

694

continue

1365

695

value = prop()

1366

696

if not hasattr(value, "variant_level"):

1367

properties[name] = value

697

all[name] = value

1368

698

continue

1369

properties[name] = type(value)(

1370

value, variant_level = value.variant_level + 1)

1371

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

1372

1373

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

1374

def PropertiesChanged(self, interface_name, changed_properties,

1375

invalidated_properties):

1376

"""Standard D-Bus PropertiesChanged() signal, see D-Bus

1377

standard.

1378

"""

1379

pass

699

all[name] = type(value)(value, variant_level=

700

value.variant_level+1)

701

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

1380

702

1381

703

@dbus.service.method(dbus.INTROSPECTABLE_IFACE,

1382

704

out_signature="s",

1383

705

path_keyword='object_path',

1384

706

connection_keyword='connection')

1385

707

def Introspect(self, object_path, connection):

1386

"""Overloading of standard D-Bus method.

1387

1388

Inserts property tags and interface annotation tags.

708

"""Standard D-Bus method, overloaded to insert property tags.

1389

709

"""

1390

xmlstring = DBusObjectWithAnnotations.Introspect(self,

1391

object_path,

1392

connection)

710

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

711

connection)

1393

712

try:

1394

713

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

1395

1396

714

def make_tag(document, name, prop):

1397

715

e = document.createElement("property")

1398

716

e.setAttribute("name", name)

1399

717

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

1400

718

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

1401

719

return e

1402

1403

720

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

1404

# Add property tags

1405

721

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

1406

722

for name, prop

1407

in self._get_all_dbus_things("property")

723

in self._get_all_dbus_properties()

1408

724

if prop._dbus_interface

1409

725

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

1410

726

if_tag.appendChild(tag)

1411

# Add annotation tags for properties

1412

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

1413

annots = dict()

1414

for name, prop in self._get_all_dbus_things(

1415

"property"):

1416

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

1417

and prop._dbus_interface

1418

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

1419

annots.update(getattr(

1420

prop, "_dbus_annotations", {}))

1421

for name, value in annots.items():

1422

ann_tag = document.createElement(

1423

"annotation")

1424

ann_tag.setAttribute("name", name)

1425

ann_tag.setAttribute("value", value)

1426

tag.appendChild(ann_tag)

1427

727

# Add the names to the return values for the

1428

728

# "org.freedesktop.DBus.Properties" methods

1429

729

if (if_tag.getAttribute("name")

1444

744

except (AttributeError, xml.dom.DOMException,

1445

745

xml.parsers.expat.ExpatError) as error:

1446

746

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

1447

exc_info=error)

1448

return xmlstring

1449

1450

try:

1451

dbus.OBJECT_MANAGER_IFACE

1452

except AttributeError:

1453

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

1454

1455

class DBusObjectWithObjectManager(DBusObjectWithAnnotations):

1456

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

1457

1458

Classes inheriting from this exposes the standard

1459

GetManagedObjects call and the InterfacesAdded and

1460

InterfacesRemoved signals on the standard

1461

"org.freedesktop.DBus.ObjectManager" interface.

1462

1463

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

1464

manually.

1465

"""

1466

@dbus.service.method(dbus.OBJECT_MANAGER_IFACE,

1467

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

1468

def GetManagedObjects(self):

1469

"""This function must be overridden"""

1470

raise NotImplementedError()

1471

1472

@dbus.service.signal(dbus.OBJECT_MANAGER_IFACE,

1473

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

1474

def InterfacesAdded(self, object_path, interfaces_and_properties):

1475

pass

1476

1477

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

1478

def InterfacesRemoved(self, object_path, interfaces):

1479

pass

1480

1481

@dbus.service.method(dbus.INTROSPECTABLE_IFACE,

1482

out_signature = "s",

1483

path_keyword = 'object_path',

1484

connection_keyword = 'connection')

1485

def Introspect(self, object_path, connection):

1486

"""Overloading of standard D-Bus method.

1487

1488

Override return argument name of GetManagedObjects to be

1489

"objpath_interfaces_and_properties"

1490

"""

1491

xmlstring = DBusObjectWithAnnotations.Introspect(self,

1492

object_path,

1493

connection)

1494

try:

1495

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

1496

1497

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

1498

# Fix argument name for the GetManagedObjects method

1499

if (if_tag.getAttribute("name")

1500

== dbus.OBJECT_MANAGER_IFACE):

1501

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

1502

if (cn.getAttribute("name")

1503

== "GetManagedObjects"):

1504

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

1505

if (arg.getAttribute("direction")

1506

== "out"):

1507

arg.setAttribute(

1508

"name",

1509

"objpath_interfaces"

1510

"_and_properties")

1511

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

1512

document.unlink()

1513

except (AttributeError, xml.dom.DOMException,

1514

xml.parsers.expat.ExpatError) as error:

1515

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

1516

exc_info = error)

1517

return xmlstring

1518

1519

def datetime_to_dbus(dt, variant_level=0):

747

error)

748

return xmlstring

749

750

751

def datetime_to_dbus (dt, variant_level=0):

1520

752

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

1521

753

if dt is None:

1522

754

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

1523

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

1524

1525

1526

def alternate_dbus_interfaces(alt_interface_names, deprecate=True):

1527

"""A class decorator; applied to a subclass of

1528

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

1529

interface names according to the "alt_interface_names" mapping.

1530

Usage:

1531

1532

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

1533

"net.example.AlternateInterface"})

1534

class SampleDBusObject(dbus.service.Object):

1535

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

1536

def SampleDBusMethod():

1537

pass

1538

1539

The above "SampleDBusMethod" on "SampleDBusObject" will be

1540

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

1541

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

1542

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

1543

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

1544

1545

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

1546

(from DBusObjectWithProperties) and interfaces (from the

1547

dbus_interface_annotations decorator).

1548

"""

1549

1550

def wrapper(cls):

1551

for orig_interface_name, alt_interface_name in (

1552

alt_interface_names.items()):

1553

attr = {}

1554

interface_names = set()

1555

# Go though all attributes of the class

1556

for attrname, attribute in inspect.getmembers(cls):

1557

# Ignore non-D-Bus attributes, and D-Bus attributes

1558

# with the wrong interface name

1559

if (not hasattr(attribute, "_dbus_interface")

1560

or not attribute._dbus_interface.startswith(

1561

orig_interface_name)):

1562

continue

1563

# Create an alternate D-Bus interface name based on

1564

# the current name

1565

alt_interface = attribute._dbus_interface.replace(

1566

orig_interface_name, alt_interface_name)

1567

interface_names.add(alt_interface)

1568

# Is this a D-Bus signal?

1569

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

1570

# Extract the original non-method undecorated

1571

# function by black magic

1572

if sys.version_info.major == 2:

1573

nonmethod_func = (dict(

1574

zip(attribute.func_code.co_freevars,

1575

attribute.__closure__))

1576

["func"].cell_contents)

1577

else:

1578

nonmethod_func = (dict(

1579

zip(attribute.__code__.co_freevars,

1580

attribute.__closure__))

1581

["func"].cell_contents)

1582

# Create a new, but exactly alike, function

1583

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

1584

# with the alternate D-Bus interface name

1585

new_function = copy_function(nonmethod_func)

1586

new_function = (dbus.service.signal(

1587

alt_interface,

1588

attribute._dbus_signature)(new_function))

1589

# Copy annotations, if any

1590

try:

1591

new_function._dbus_annotations = dict(

1592

attribute._dbus_annotations)

1593

except AttributeError:

1594

pass

1595

# Define a creator of a function to call both the

1596

# original and alternate functions, so both the

1597

# original and alternate signals gets sent when

1598

# the function is called

1599

def fixscope(func1, func2):

1600

"""This function is a scope container to pass

1601

func1 and func2 to the "call_both" function

1602

outside of its arguments"""

1603

1604

@functools.wraps(func2)

1605

def call_both(*args, **kwargs):

1606

"""This function will emit two D-Bus

1607

signals by calling func1 and func2"""

1608

func1(*args, **kwargs)

1609

func2(*args, **kwargs)

1610

# Make wrapper function look like a D-Bus signal

1611

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

1612

if name.startswith("_dbus_"):

1613

setattr(call_both, name, attr)

1614

1615

return call_both

1616

# Create the "call_both" function and add it to

1617

# the class

1618

attr[attrname] = fixscope(attribute, new_function)

1619

# Is this a D-Bus method?

1620

elif getattr(attribute, "_dbus_is_method", False):

1621

# Create a new, but exactly alike, function

1622

# object. Decorate it to be a new D-Bus method

1623

# with the alternate D-Bus interface name. Add it

1624

# to the class.

1625

attr[attrname] = (

1626

dbus.service.method(

1627

alt_interface,

1628

attribute._dbus_in_signature,

1629

attribute._dbus_out_signature)

1630

(copy_function(attribute)))

1631

# Copy annotations, if any

1632

try:

1633

attr[attrname]._dbus_annotations = dict(

1634

attribute._dbus_annotations)

1635

except AttributeError:

1636

pass

1637

# Is this a D-Bus property?

1638

elif getattr(attribute, "_dbus_is_property", False):

1639

# Create a new, but exactly alike, function

1640

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

1641

# property with the alternate D-Bus interface

1642

# name. Add it to the class.

1643

attr[attrname] = (dbus_service_property(

1644

alt_interface, attribute._dbus_signature,

1645

attribute._dbus_access,

1646

attribute._dbus_get_args_options

1647

["byte_arrays"])

1648

(copy_function(attribute)))

1649

# Copy annotations, if any

1650

try:

1651

attr[attrname]._dbus_annotations = dict(

1652

attribute._dbus_annotations)

1653

except AttributeError:

1654

pass

1655

# Is this a D-Bus interface?

1656

elif getattr(attribute, "_dbus_is_interface", False):

1657

# Create a new, but exactly alike, function

1658

# object. Decorate it to be a new D-Bus interface

1659

# with the alternate D-Bus interface name. Add it

1660

# to the class.

1661

attr[attrname] = (

1662

dbus_interface_annotations(alt_interface)

1663

(copy_function(attribute)))

1664

if deprecate:

1665

# Deprecate all alternate interfaces

1666

iname="_AlternateDBusNames_interface_annotation{}"

1667

for interface_name in interface_names:

1668

1669

@dbus_interface_annotations(interface_name)

1670

def func(self):

1671

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

1672

"true" }

1673

# Find an unused name

1674

for aname in (iname.format(i)

1675

for i in itertools.count()):

1676

if aname not in attr:

1677

attr[aname] = func

1678

break

1679

if interface_names:

1680

# Replace the class with a new subclass of it with

1681

# methods, signals, etc. as created above.

1682

if sys.version_info.major == 2:

1683

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

1684

(cls, ), attr)

1685

else:

1686

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

1687

(cls, ), attr)

1688

return cls

1689

1690

return wrapper

1691

1692

1693

@alternate_dbus_interfaces({"se.recompile.Mandos":

1694

"se.bsnet.fukt.Mandos"})

755

return dbus.String(dt.isoformat(),

756

variant_level=variant_level)

757

758

class transitional_dbus_metaclass(DBusObjectWithProperties.__metaclass__):

759

def __new__(mcs, name, bases, attr):

760

for attrname, old_dbusobj in inspect.getmembers(bases[0]):

761

new_interface = getattr(old_dbusobj, "_dbus_interface", "").replace("se.bsnet.fukt.", "se.recompile.")

762

if (getattr(old_dbusobj, "_dbus_is_signal", False)

763

and old_dbusobj._dbus_interface.startswith("se.bsnet.fukt.Mandos")):

764

unwrappedfunc = dict(zip(old_dbusobj.func_code.co_freevars,

765

old_dbusobj.__closure__))["func"].cell_contents

766

newfunc = types.FunctionType(unwrappedfunc.func_code,

767

unwrappedfunc.func_globals,

768

unwrappedfunc.func_name,

769

unwrappedfunc.func_defaults,

770

unwrappedfunc.func_closure)

771

new_dbusfunc = dbus.service.signal(

772

new_interface, old_dbusobj._dbus_signature)(newfunc)

773

attr["_transitional_" + attrname] = new_dbusfunc

774

775

def fixscope(func1, func2):

776

def newcall(*args, **kwargs):

777

func1(*args, **kwargs)

778

func2(*args, **kwargs)

779

return newcall

780

781

attr[attrname] = fixscope(old_dbusobj, new_dbusfunc)

782

783

elif (getattr(old_dbusobj, "_dbus_is_method", False)

784

and old_dbusobj._dbus_interface.startswith("se.bsnet.fukt.Mandos")):

785

new_dbusfunc = (dbus.service.method

786

(new_interface,

787

old_dbusobj._dbus_in_signature,

788

old_dbusobj._dbus_out_signature)

789

(types.FunctionType

790

(old_dbusobj.func_code,

791

old_dbusobj.func_globals,

792

old_dbusobj.func_name,

793

old_dbusobj.func_defaults,

794

old_dbusobj.func_closure)))

795

796

attr[attrname] = new_dbusfunc

797

elif (getattr(old_dbusobj, "_dbus_is_property", False)

798

and old_dbusobj._dbus_interface.startswith("se.bsnet.fukt.Mandos")):

799

new_dbusfunc = (dbus_service_property

800

(new_interface,

801

old_dbusobj._dbus_signature,

802

old_dbusobj._dbus_access,

803

old_dbusobj._dbus_get_args_options["byte_arrays"])

804

(types.FunctionType

805

(old_dbusobj.func_code,

806

old_dbusobj.func_globals,

807

old_dbusobj.func_name,

808

old_dbusobj.func_defaults,

809

old_dbusobj.func_closure)))

810

811

attr[attrname] = new_dbusfunc

812

return type.__new__(mcs, name, bases, attr)

813

1695

814

class ClientDBus(Client, DBusObjectWithProperties):

1696

815

"""A Client class using D-Bus

1697

816

1701

820

"""

1702

821

1703

822

runtime_expansions = (Client.runtime_expansions

1704

+ ("dbus_object_path", ))

1705

1706

_interface = "se.recompile.Mandos.Client"

823

+ ("dbus_object_path",))

1707

824

1708

825

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

1709

826

1710

827

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

828

self._approvals_pending = 0

1711

829

self.bus = bus

1712

830

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

1713

831

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

1714

832

# the D-Bus

1715

client_object_name = str(self.name).translate(

833

client_object_name = unicode(self.name).translate(

1716

834

{ord("."): ord("_"),

1717

835

ord("-"): ord("_")})

1718

self.dbus_object_path = dbus.ObjectPath(

1719

"/clients/" + client_object_name)

836

self.dbus_object_path = (dbus.ObjectPath

837

("/clients/" + client_object_name))

1720

838

DBusObjectWithProperties.__init__(self, self.bus,

1721

839

self.dbus_object_path)

1722

1723

def notifychangeproperty(transform_func, dbus_name,

1724

type_func=lambda x: x,

1725

variant_level=1,

1726

invalidate_only=False,

1727

_interface=_interface):

1728

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

1729

its changes to DBus.

1730

840

1731

transform_fun: Function that takes a value and a variant_level

1732

and transforms it to a D-Bus type.

1733

dbus_name: D-Bus name of the variable

841

def notifychangeproperty(transform_func,

842

dbus_name, type_func=lambda x: x,

843

variant_level=1):

844

""" Modify a variable so that its a property that announce its

845

changes to DBus.

846

transform_fun: Function that takes a value and transform it to

847

DBus type.

848

dbus_name: DBus name of the variable

1734

849

type_func: Function that transform the value before sending it

1735

to the D-Bus. Default: no transform

1736

variant_level: D-Bus variant level. Default: 1

850

to DBus

851

variant_level: DBus variant level. default: 1

1737

852

"""

1738

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

1739

853

real_value = [None,]

1740

854

def setter(self, value):

855

old_value = real_value[0]

856

real_value[0] = value

1741

857

if hasattr(self, "dbus_object_path"):

1742

if (not hasattr(self, attrname) or

1743

type_func(getattr(self, attrname, None))

1744

!= type_func(value)):

1745

if invalidate_only:

1746

self.PropertiesChanged(

1747

_interface, dbus.Dictionary(),

1748

dbus.Array((dbus_name, )))

1749

else:

1750

dbus_value = transform_func(

1751

type_func(value),

1752

variant_level = variant_level)

1753

self.PropertyChanged(dbus.String(dbus_name),

1754

dbus_value)

1755

self.PropertiesChanged(

1756

_interface,

1757

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

1758

dbus_value }),

1759

dbus.Array())

1760

setattr(self, attrname, value)

858

if type_func(old_value) != type_func(real_value[0]):

859

dbus_value = transform_func(type_func(real_value[0]),

860

variant_level)

861

self.PropertyChanged(dbus.String(dbus_name),

862

dbus_value)

1761

863

1762

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

864

return property(lambda self: real_value[0], setter)

865

1763

866

1764

867

expires = notifychangeproperty(datetime_to_dbus, "Expires")

1765

868

approvals_pending = notifychangeproperty(dbus.Boolean,

1768

871

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

1769

872

last_enabled = notifychangeproperty(datetime_to_dbus,

1770

873

"LastEnabled")

1771

checker = notifychangeproperty(

1772

dbus.Boolean, "CheckerRunning",

1773

type_func = lambda checker: checker is not None)

874

checker = notifychangeproperty(dbus.Boolean, "CheckerRunning",

875

type_func = lambda checker: checker is not None)

1774

876

last_checked_ok = notifychangeproperty(datetime_to_dbus,

1775

877

"LastCheckedOK")

1776

last_checker_status = notifychangeproperty(dbus.Int16,

1777

"LastCheckerStatus")

1778

last_approval_request = notifychangeproperty(

1779

datetime_to_dbus, "LastApprovalRequest")

878

last_approval_request = notifychangeproperty(datetime_to_dbus,

879

"LastApprovalRequest")

1780

880

approved_by_default = notifychangeproperty(dbus.Boolean,

1781

881

"ApprovedByDefault")

1782

approval_delay = notifychangeproperty(

1783

dbus.UInt64, "ApprovalDelay",

1784

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

1785

approval_duration = notifychangeproperty(

1786

dbus.UInt64, "ApprovalDuration",

1787

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

882

approval_delay = notifychangeproperty(dbus.UInt16, "ApprovalDelay",

883

type_func = _timedelta_to_milliseconds)

884

approval_duration = notifychangeproperty(dbus.UInt16, "ApprovalDuration",

885

type_func = _timedelta_to_milliseconds)

1788

886

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

1789

timeout = notifychangeproperty(

1790

dbus.UInt64, "Timeout",

1791

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

1792

extended_timeout = notifychangeproperty(

1793

dbus.UInt64, "ExtendedTimeout",

1794

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

1795

interval = notifychangeproperty(

1796

dbus.UInt64, "Interval",

1797

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

887

timeout = notifychangeproperty(dbus.UInt16, "Timeout",

888

type_func = _timedelta_to_milliseconds)

889

extended_timeout = notifychangeproperty(dbus.UInt16, "ExtendedTimeout",

890

type_func = _timedelta_to_milliseconds)

891

interval = notifychangeproperty(dbus.UInt16, "Interval",

892

type_func = _timedelta_to_milliseconds)

1798

893

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

1799

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

1800

invalidate_only=True)

1801

894

1802

895

del notifychangeproperty

1803

896

1810

903

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

1811

904

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

1812

905

1813

def checker_callback(self, source, condition,

1814

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

1815

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

1816

connection, command, *args,

1817

**kwargs)

1818

exitstatus = self.last_checker_status

1819

if exitstatus >= 0:

906

def checker_callback(self, pid, condition, command,

907

*args, **kwargs):

908

self.checker_callback_tag = None

909

self.checker = None

910

if os.WIFEXITED(condition):

911

exitstatus = os.WEXITSTATUS(condition)

1820

912

# Emit D-Bus signal

1821

913

self.CheckerCompleted(dbus.Int16(exitstatus),

1822

# This is specific to GNU libC

1823

dbus.Int64(exitstatus << 8),

914

dbus.Int64(condition),

1824

915

dbus.String(command))

1825

916

else:

1826

917

# Emit D-Bus signal

1827

918

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

1828

dbus.Int64(

1829

# This is specific to GNU libC

1830

(exitstatus << 8)

1831

| self.last_checker_signal),

919

dbus.Int64(condition),

1832

920

dbus.String(command))

1833

return ret

921

922

return Client.checker_callback(self, pid, condition, command,

923

*args, **kwargs)

1834

924

1835

925

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

1836

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

926

old_checker = self.checker

927

if self.checker is not None:

928

old_checker_pid = self.checker.pid

929

else:

930

old_checker_pid = None

1837

931

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

1838

932

# Only if new checker process was started

1839

933

if (self.checker is not None

1843

937

return r

1844

938

1845

939

def _reset_approved(self):

1846

self.approved = None

940

self._approved = None

1847

941

return False

1848

942

1849

943

def approve(self, value=True):

1850

self.approved = value

1851

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

1852

* 1000), self._reset_approved)

1853

944

self.send_changedstate()

945

self._approved = value

946

gobject.timeout_add(_timedelta_to_milliseconds

947

(self.approval_duration),

948

self._reset_approved)

949

1854

950

1855

951

## D-Bus methods, signals & properties

1856

1857

## Interfaces

1858

952

_interface = "se.bsnet.fukt.Mandos.Client"

953

1859

954

## Signals

1860

955

1861

956

# CheckerCompleted - signal

1871

966

pass

1872

967

1873

968

# PropertyChanged - signal

1874

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

1875

969

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

1876

970

def PropertyChanged(self, property, value):

1877

971

"D-Bus signal"

1911

1005

self.checked_ok()

1912

1006

1913

1007

# Enable - method

1914

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

1915

1008

@dbus.service.method(_interface)

1916

1009

def Enable(self):

1917

1010

"D-Bus method"

1918

1011

self.enable()

1919

1012

1920

1013

# StartChecker - method

1921

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

1922

1014

@dbus.service.method(_interface)

1923

1015

def StartChecker(self):

1924

1016

"D-Bus method"

1925

1017

self.start_checker()

1926

1018

1927

1019

# Disable - method

1928

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

1929

1020

@dbus.service.method(_interface)

1930

1021

def Disable(self):

1931

1022

"D-Bus method"

1932

1023

self.disable()

1933

1024

1934

1025

# StopChecker - method

1935

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

1936

1026

@dbus.service.method(_interface)

1937

1027

def StopChecker(self):

1938

1028

self.stop_checker()

1945

1035

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

1946

1036

1947

1037

# ApprovedByDefault - property

1948

@dbus_service_property(_interface,

1949

signature="b",

1038

@dbus_service_property(_interface, signature="b",

1950

1039

access="readwrite")

1951

1040

def ApprovedByDefault_dbus_property(self, value=None):

1952

1041

if value is None: # get

1954

1043

self.approved_by_default = bool(value)

1955

1044

1956

1045

# ApprovalDelay - property

1957

@dbus_service_property(_interface,

1958

signature="t",

1046

@dbus_service_property(_interface, signature="t",

1959

1047

access="readwrite")

1960

1048

def ApprovalDelay_dbus_property(self, value=None):

1961

1049

if value is None: # get

1962

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

1963

* 1000)

1050

return dbus.UInt64(self.approval_delay_milliseconds())

1964

1051

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

1965

1052

1966

1053

# ApprovalDuration - property

1967

@dbus_service_property(_interface,

1968

signature="t",

1054

@dbus_service_property(_interface, signature="t",

1969

1055

access="readwrite")

1970

1056

def ApprovalDuration_dbus_property(self, value=None):

1971

1057

if value is None: # get

1972

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

1973

* 1000)

1058

return dbus.UInt64(_timedelta_to_milliseconds(

1059

self.approval_duration))

1974

1060

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

1975

1061

1976

1062

# Name - property

1977

@dbus_annotations(

1978

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

1979

1063

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

1980

1064

def Name_dbus_property(self):

1981

1065

return dbus.String(self.name)

1982

1066

1983

1067

# Fingerprint - property

1984

@dbus_annotations(

1985

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

1986

1068

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

1987

1069

def Fingerprint_dbus_property(self):

1988

1070

return dbus.String(self.fingerprint)

1989

1071

1990

1072

# Host - property

1991

@dbus_service_property(_interface,

1992

signature="s",

1073

@dbus_service_property(_interface, signature="s",

1993

1074

access="readwrite")

1994

1075

def Host_dbus_property(self, value=None):

1995

1076

if value is None: # get

1996

1077

return dbus.String(self.host)

1997

self.host = str(value)

1078

self.host = value

1998

1079

1999

1080

# Created - property

2000

@dbus_annotations(

2001

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

2002

1081

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

2003

1082

def Created_dbus_property(self):

2004

return datetime_to_dbus(self.created)

1083

return dbus.String(datetime_to_dbus(self.created))

2005

1084

2006

1085

# LastEnabled - property

2007

1086

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

2009

1088

return datetime_to_dbus(self.last_enabled)

2010

1089

2011

1090

# Enabled - property

2012

@dbus_service_property(_interface,

2013

signature="b",

1091

@dbus_service_property(_interface, signature="b",

2014

1092

access="readwrite")

2015

1093

def Enabled_dbus_property(self, value=None):

2016

1094

if value is None: # get

2021

1099

self.disable()

2022

1100

2023

1101

# LastCheckedOK - property

2024

@dbus_service_property(_interface,

2025

signature="s",

1102

@dbus_service_property(_interface, signature="s",

2026

1103

access="readwrite")

2027

1104

def LastCheckedOK_dbus_property(self, value=None):

2028

1105

if value is not None:

2030

1107

return

2031

1108

return datetime_to_dbus(self.last_checked_ok)

2032

1109

2033

# LastCheckerStatus - property

2034

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

2035

def LastCheckerStatus_dbus_property(self):

2036

return dbus.Int16(self.last_checker_status)

2037

2038

1110

# Expires - property

2039

1111

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

2040

1112

def Expires_dbus_property(self):

2046

1118

return datetime_to_dbus(self.last_approval_request)

2047

1119

2048

1120

# Timeout - property

2049

@dbus_service_property(_interface,

2050

signature="t",

1121

@dbus_service_property(_interface, signature="t",

2051

1122

access="readwrite")

2052

1123

def Timeout_dbus_property(self, value=None):

2053

1124

if value is None: # get

2054

return dbus.UInt64(self.timeout.total_seconds() * 1000)

2055

old_timeout = self.timeout

1125

return dbus.UInt64(self.timeout_milliseconds())

2056

1126

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

2057

# Reschedule disabling

2058

if self.enabled:

2059

now = datetime.datetime.utcnow()

2060

self.expires += self.timeout - old_timeout

2061

if self.expires <= now:

2062

# The timeout has passed

2063

self.disable()

2064

else:

2065

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

2066

is None):

2067

return

2068

GLib.source_remove(self.disable_initiator_tag)

2069

self.disable_initiator_tag = GLib.timeout_add(

2070

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

2071

self.disable)

1127

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

1128

return

1129

# Reschedule timeout

1130

gobject.source_remove(self.disable_initiator_tag)

1131

self.disable_initiator_tag = None

1132

self.expires = None

1133

time_to_die = (self.

1134

_timedelta_to_milliseconds((self

1135

.last_checked_ok

1136

+ self.timeout)

1137

- datetime.datetime

1138

.utcnow()))

1139

if time_to_die <= 0:

1140

# The timeout has passed

1141

self.disable()

1142

else:

1143

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

1144

+ datetime.timedelta(milliseconds = time_to_die))

1145

self.disable_initiator_tag = (gobject.timeout_add

1146

(time_to_die, self.disable))

2072

1147

2073

1148

# ExtendedTimeout - property

2074

@dbus_service_property(_interface,

2075

signature="t",

1149

@dbus_service_property(_interface, signature="t",

2076

1150

access="readwrite")

2077

1151

def ExtendedTimeout_dbus_property(self, value=None):

2078

1152

if value is None: # get

2079

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

2080

* 1000)

1153

return dbus.UInt64(self.extended_timeout_milliseconds())

2081

1154

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

2082

1155

2083

1156

# Interval - property

2084

@dbus_service_property(_interface,

2085

signature="t",

1157

@dbus_service_property(_interface, signature="t",

2086

1158

access="readwrite")

2087

1159

def Interval_dbus_property(self, value=None):

2088

1160

if value is None: # get

2089

return dbus.UInt64(self.interval.total_seconds() * 1000)

1161

return dbus.UInt64(self.interval_milliseconds())

2090

1162

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

2091

1163

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

2092

1164

return

2093

if self.enabled:

2094

# Reschedule checker run

2095

GLib.source_remove(self.checker_initiator_tag)

2096

self.checker_initiator_tag = GLib.timeout_add(

2097

value, self.start_checker)

2098

self.start_checker() # Start one now, too

1165

# Reschedule checker run

1166

gobject.source_remove(self.checker_initiator_tag)

1167

self.checker_initiator_tag = (gobject.timeout_add

1168

(value, self.start_checker))

1169

self.start_checker() # Start one now, too

2099

1170

2100

1171

# Checker - property

2101

@dbus_service_property(_interface,

2102

signature="s",

1172

@dbus_service_property(_interface, signature="s",

2103

1173

access="readwrite")

2104

1174

def Checker_dbus_property(self, value=None):

2105

1175

if value is None: # get

2106

1176

return dbus.String(self.checker_command)

2107

self.checker_command = str(value)

1177

self.checker_command = value

2108

1178

2109

1179

# CheckerRunning - property

2110

@dbus_service_property(_interface,

2111

signature="b",

1180

@dbus_service_property(_interface, signature="b",

2112

1181

access="readwrite")

2113

1182

def CheckerRunning_dbus_property(self, value=None):

2114

1183

if value is None: # get

2119

1188

self.stop_checker()

2120

1189

2121

1190

# ObjectPath - property

2122

@dbus_annotations(

2123

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

2124

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

2125

1191

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

2126

1192

def ObjectPath_dbus_property(self):

2127

1193

return self.dbus_object_path # is already a dbus.ObjectPath

2128

1194

2129

1195

# Secret = property

2130

@dbus_annotations(

2131

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

2132

"invalidates"})

2133

@dbus_service_property(_interface,

2134

signature="ay",

2135

access="write",

2136

byte_arrays=True)

1196

@dbus_service_property(_interface, signature="ay",

1197

access="write", byte_arrays=True)

2137

1198

def Secret_dbus_property(self, value):

2138

self.secret = bytes(value)

1199

self.secret = str(value)

2139

1200

2140

1201

del _interface

2141

1202

2145

1206

self._pipe = child_pipe

2146

1207

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

2147

1208

if not self._pipe.recv():

2148

raise KeyError(fpr)

1209

raise KeyError()

2149

1210

2150

1211

def __getattribute__(self, name):

2151

if name == '_pipe':

1212

if(name == '_pipe'):

2152

1213

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

2153

1214

self._pipe.send(('getattr', name))

2154

1215

data = self._pipe.recv()

2155

1216

if data[0] == 'data':

2156

1217

return data[1]

2157

1218

if data[0] == 'function':

2158

2159

1219

def func(*args, **kwargs):

2160

1220

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

2161

1221

return self._pipe.recv()[1]

2162

2163

1222

return func

2164

1223

2165

1224

def __setattr__(self, name, value):

2166

if name == '_pipe':

1225

if(name == '_pipe'):

2167

1226

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

2168

1227

self._pipe.send(('setattr', name, value))

2169

1228

1229

class ClientDBusTransitional(ClientDBus):

1230

__metaclass__ = transitional_dbus_metaclass

2170

1231

2171

1232

class ClientHandler(socketserver.BaseRequestHandler, object):

2172

1233

"""A class to handle client connections.

2177

1238

def handle(self):

2178

1239

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

2179

1240

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

2180

str(self.client_address))

1241

unicode(self.client_address))

2181

1242

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

2182

1243

self.server.child_pipe.fileno())

2183

1244

2184

session = gnutls.ClientSession(self.request)

1245

session = (gnutls.connection

1246

.ClientSession(self.request,

1247

gnutls.connection

1248

.X509Credentials()))

1249

1250

# Note: gnutls.connection.X509Credentials is really a

1251

# generic GnuTLS certificate credentials object so long as

1252

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

1253

# here despite using OpenPGP certificates.

2185

1254

2186

1255

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

2187

1256

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

2191

1260

priority = self.server.gnutls_priority

2192

1261

if priority is None:

2193

1262

priority = "NORMAL"

2194

gnutls.priority_set_direct(session._c_object,

2195

priority.encode("utf-8"),

2196

None)

1263

(gnutls.library.functions

1264

.gnutls_priority_set_direct(session._c_object,

1265

priority, None))

2197

1266

2198

1267

# Start communication using the Mandos protocol

2199

1268

# Get protocol number

2201

1270

logger.debug("Protocol version: %r", line)

2202

1271

try:

2203

1272

if int(line.strip().split()[0]) > 1:

2204

raise RuntimeError(line)

1273

raise RuntimeError

2205

1274

except (ValueError, IndexError, RuntimeError) as error:

2206

1275

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

2207

1276

return

2209

1278

# Start GnuTLS connection

2210

1279

try:

2211

1280

session.handshake()

2212

except gnutls.Error as error:

1281

except gnutls.errors.GNUTLSError as error:

2213

1282

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

2214

1283

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

2215

1284

# established. Just abandon the request.

2219

1288

approval_required = False

2220

1289

try:

2221

1290

try:

2222

fpr = self.fingerprint(

2223

self.peer_certificate(session))

2224

except (TypeError, gnutls.Error) as error:

1291

fpr = self.fingerprint(self.peer_certificate

1292

(session))

1293

except (TypeError,

1294

gnutls.errors.GNUTLSError) as error:

2225

1295

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

2226

1296

return

2227

1297

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

2240

1310

while True:

2241

1311

if not client.enabled:

2242

1312

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

2243

client.name)

1313

client.name)

2244

1314

if self.server.use_dbus:

2245

1315

# Emit D-Bus signal

2246

client.Rejected("Disabled")

1316

client.Rejected("Disabled")

2247

1317

return

2248

1318

2249

if client.approved or not client.approval_delay:

1319

if client._approved or not client.approval_delay:

2250

1320

#We are approved or approval is disabled

2251

1321

break

2252

elif client.approved is None:

1322

elif client._approved is None:

2253

1323

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

2254

1324

client.name)

2255

1325

if self.server.use_dbus:

2256

1326

# Emit D-Bus signal

2257

1327

client.NeedApproval(

2258

client.approval_delay.total_seconds()

2259

* 1000, client.approved_by_default)

1328

client.approval_delay_milliseconds(),

1329

client.approved_by_default)

2260

1330

else:

2261

1331

logger.warning("Client %s was not approved",

2262

1332

client.name)

2266

1336

return

2267

1337

2268

1338

#wait until timeout or approved

1339

#x = float(client._timedelta_to_milliseconds(delay))

2269

1340

time = datetime.datetime.now()

2270

1341

client.changedstate.acquire()

2271

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

1342

client.changedstate.wait(float(client._timedelta_to_milliseconds(delay) / 1000))

2272

1343

client.changedstate.release()

2273

1344

time2 = datetime.datetime.now()

2274

1345

if (time2 - time) >= delay:

2285

1356

else:

2286

1357

delay -= time2 - time

2287

1358

2288

try:

2289

session.send(client.secret)

2290

except gnutls.Error as error:

2291

logger.warning("gnutls send failed",

2292

exc_info = error)

2293

return

1359

sent_size = 0

1360

while sent_size < len(client.secret):

1361

try:

1362

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

1363

except gnutls.errors.GNUTLSError as error:

1364

logger.warning("gnutls send failed")

1365

return

1366

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

1367

sent, len(client.secret)

1368

- (sent_size + sent))

1369

sent_size += sent

2294

1370

2295

1371

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

2296

# bump the timeout using extended_timeout

2297

client.bump_timeout(client.extended_timeout)

1372

# bump the timeout as if seen

1373

client.checked_ok(client.extended_timeout)

2298

1374

if self.server.use_dbus:

2299

1375

# Emit D-Bus signal

2300

1376

client.GotSecret()

2304

1380

client.approvals_pending -= 1

2305

1381

try:

2306

1382

session.bye()

2307

except gnutls.Error as error:

2308

logger.warning("GnuTLS bye failed",

2309

exc_info=error)

1383

except gnutls.errors.GNUTLSError as error:

1384

logger.warning("GnuTLS bye failed")

2310

1385

2311

1386

@staticmethod

2312

1387

def peer_certificate(session):

2313

1388

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

2314

1389

# If not an OpenPGP certificate...

2315

if (gnutls.certificate_type_get(session._c_object)

2316

!= gnutls.CRT_OPENPGP):

2317

# ...return invalid data

2318

return b""

1390

if (gnutls.library.functions

1391

.gnutls_certificate_type_get(session._c_object)

1392

!= gnutls.library.constants.GNUTLS_CRT_OPENPGP):

1393

# ...do the normal thing

1394

return session.peer_certificate

2319

1395

list_size = ctypes.c_uint(1)

2320

cert_list = (gnutls.certificate_get_peers

1396

cert_list = (gnutls.library.functions

1397

.gnutls_certificate_get_peers

2321

1398

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

2322

1399

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

2323

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

1400

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

1401

" certificate")

2324

1402

if list_size.value == 0:

2325

1403

return None

2326

1404

cert = cert_list[0]

2330

1408

def fingerprint(openpgp):

2331

1409

"Convert an OpenPGP bytestring to a hexdigit fingerprint"

2332

1410

# New GnuTLS "datum" with the OpenPGP public key

2333

datum = gnutls.datum_t(

2334

ctypes.cast(ctypes.c_char_p(openpgp),

2335

ctypes.POINTER(ctypes.c_ubyte)),

2336

ctypes.c_uint(len(openpgp)))

1411

datum = (gnutls.library.types

1412

.gnutls_datum_t(ctypes.cast(ctypes.c_char_p(openpgp),

1413

ctypes.POINTER

1414

(ctypes.c_ubyte)),

1415

ctypes.c_uint(len(openpgp))))

2337

1416

# New empty GnuTLS certificate

2338

crt = gnutls.openpgp_crt_t()

2339

gnutls.openpgp_crt_init(ctypes.byref(crt))

1417

crt = gnutls.library.types.gnutls_openpgp_crt_t()

1418

(gnutls.library.functions

1419

.gnutls_openpgp_crt_init(ctypes.byref(crt)))

2340

1420

# Import the OpenPGP public key into the certificate

2341

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

2342

gnutls.OPENPGP_FMT_RAW)

1421

(gnutls.library.functions

1422

.gnutls_openpgp_crt_import(crt, ctypes.byref(datum),

1423

gnutls.library.constants

1424

.GNUTLS_OPENPGP_FMT_RAW))

2343

1425

# Verify the self signature in the key

2344

1426

crtverify = ctypes.c_uint()

2345

gnutls.openpgp_crt_verify_self(crt, 0,

2346

ctypes.byref(crtverify))

1427

(gnutls.library.functions

1428

.gnutls_openpgp_crt_verify_self(crt, 0,

1429

ctypes.byref(crtverify)))

2347

1430

if crtverify.value != 0:

2348

gnutls.openpgp_crt_deinit(crt)

2349

raise gnutls.CertificateSecurityError("Verify failed")

1431

gnutls.library.functions.gnutls_openpgp_crt_deinit(crt)

1432

raise (gnutls.errors.CertificateSecurityError

1433

("Verify failed"))

2350

1434

# New buffer for the fingerprint

2351

1435

buf = ctypes.create_string_buffer(20)

2352

1436

buf_len = ctypes.c_size_t()

2353

1437

# Get the fingerprint from the certificate into the buffer

2354

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

2355

ctypes.byref(buf_len))

1438

(gnutls.library.functions

1439

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

1440

ctypes.byref(buf_len)))

2356

1441

# Deinit the certificate

2357

gnutls.openpgp_crt_deinit(crt)

1442

gnutls.library.functions.gnutls_openpgp_crt_deinit(crt)

2358

1443

# Convert the buffer to a Python bytestring

2359

1444

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

2360

1445

# Convert the bytestring to hexadecimal notation

2361

hex_fpr = binascii.hexlify(fpr).upper()

1446

hex_fpr = ''.join("%02X" % ord(char) for char in fpr)

2362

1447

return hex_fpr

2363

1448

2364

1449

2365

1450

class MultiprocessingMixIn(object):

2366

1451

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

2367

2368

1452

def sub_process_main(self, request, address):

2369

1453

try:

2370

1454

self.finish_request(request, address)

2371

except Exception:

1455

except:

2372

1456

self.handle_error(request, address)

2373

1457

self.close_request(request)

2374

1458

2375

1459

def process_request(self, request, address):

2376

1460

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

2377

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

2378

args = (request, address))

2379

proc.start()

2380

return proc

1461

multiprocessing.Process(target = self.sub_process_main,

1462

args = (request, address)).start()

2381

1463

2382

1464

2383

1465

class MultiprocessingMixInWithPipe(MultiprocessingMixIn, object):

2384

1466

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

2385

2386

1467

def process_request(self, request, client_address):

2387

1468

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

2388

1469

2390

1471

"""

2391

1472

parent_pipe, self.child_pipe = multiprocessing.Pipe()

2392

1473

2393

proc = MultiprocessingMixIn.process_request(self, request,

2394

client_address)

1474

super(MultiprocessingMixInWithPipe,

1475

self).process_request(request, client_address)

2395

1476

self.child_pipe.close()

2396

self.add_pipe(parent_pipe, proc)

1477

self.add_pipe(parent_pipe)

2397

1478

2398

def add_pipe(self, parent_pipe, proc):

1479

def add_pipe(self, parent_pipe):

2399

1480

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

2400

raise NotImplementedError()

1481

raise NotImplementedError

2401

1482

2402

1483

2403

1484

class IPv6_TCPServer(MultiprocessingMixInWithPipe,

2409

1490

interface: None or a network interface name (string)

2410

1491

use_ipv6: Boolean; to use IPv6 or not

2411

1492

"""

2412

2413

1493

def __init__(self, server_address, RequestHandlerClass,

2414

interface=None,

2415

use_ipv6=True,

2416

socketfd=None):

2417

"""If socketfd is set, use that file descriptor instead of

2418

creating a new one with socket.socket().

2419

"""

1494

interface=None, use_ipv6=True):

2420

1495

self.interface = interface

2421

1496

if use_ipv6:

2422

1497

self.address_family = socket.AF_INET6

2423

if socketfd is not None:

2424

# Save the file descriptor

2425

self.socketfd = socketfd

2426

# Save the original socket.socket() function

2427

self.socket_socket = socket.socket

2428

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

2429

#

2430

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

2431

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

2432

# patching socket.socket.)

2433

#

2434

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

2435

@functools.wraps(socket.socket)

2436

def socket_wrapper(*args, **kwargs):

2437

# Restore original function so subsequent calls are

2438

# not affected.

2439

socket.socket = self.socket_socket

2440

del self.socket_socket

2441

# This time only, return a new socket object from the

2442

# saved file descriptor.

2443

return socket.fromfd(self.socketfd, *args, **kwargs)

2444

# Replace socket.socket() function with wrapper

2445

socket.socket = socket_wrapper

2446

# The socketserver.TCPServer.__init__ will call

2447

# socket.socket(), which might be our replacement,

2448

# socket_wrapper(), if socketfd was set.

2449

1498

socketserver.TCPServer.__init__(self, server_address,

2450

1499

RequestHandlerClass)

2451

2452

1500

def server_bind(self):

2453

1501

"""This overrides the normal server_bind() function

2454

1502

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

2455

1503

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

2456

global SO_BINDTODEVICE

2457

1504

if self.interface is not None:

2458

1505

if SO_BINDTODEVICE is None:

2459

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

2460

# common enough.

2461

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

2462

SO_BINDTODEVICE = 25

2463

try:

2464

self.socket.setsockopt(

2465

socket.SOL_SOCKET, SO_BINDTODEVICE,

2466

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

2467

except socket.error as error:

2468

if error.errno == errno.EPERM:

2469

logger.error("No permission to bind to"

2470

" interface %s", self.interface)

2471

elif error.errno == errno.ENOPROTOOPT:

2472

logger.error("SO_BINDTODEVICE not available;"

2473

" cannot bind to interface %s",

2474

self.interface)

2475

elif error.errno == errno.ENODEV:

2476

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

2477

" cannot bind", self.interface)

2478

else:

2479

raise

1506

logger.error("SO_BINDTODEVICE does not exist;"

1507

" cannot bind to interface %s",

1508

self.interface)

1509

else:

1510

try:

1511

self.socket.setsockopt(socket.SOL_SOCKET,

1512

SO_BINDTODEVICE,

1513

str(self.interface

1514

+ '\0'))

1515

except socket.error as error:

1516

if error[0] == errno.EPERM:

1517

logger.error("No permission to"

1518

" bind to interface %s",

1519

self.interface)

1520

elif error[0] == errno.ENOPROTOOPT:

1521

logger.error("SO_BINDTODEVICE not available;"

1522

" cannot bind to interface %s",

1523

self.interface)

1524

else:

1525

raise

2480

1526

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

2481

1527

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

2482

1528

if not self.server_address[0]:

2483

1529

if self.address_family == socket.AF_INET6:

2484

1530

any_address = "::" # in6addr_any

2485

1531

else:

2486

any_address = "0.0.0.0" # INADDR_ANY

1532

any_address = socket.INADDR_ANY

2487

1533

self.server_address = (any_address,

2488

1534

self.server_address[1])

2489

1535

elif not self.server_address[1]:

2490

self.server_address = (self.server_address[0], 0)

1536

self.server_address = (self.server_address[0],

1537

0)

2491

1538

# if self.interface:

2492

1539

# self.server_address = (self.server_address[0],

2493

1540

# 0, # port

2505

1552

gnutls_priority GnuTLS priority string

2506

1553

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

2507

1554

2508

Assumes a GLib.MainLoop event loop.

1555

Assumes a gobject.MainLoop event loop.

2509

1556

"""

2510

2511

1557

def __init__(self, server_address, RequestHandlerClass,

2512

interface=None,

2513

use_ipv6=True,

2514

clients=None,

2515

gnutls_priority=None,

2516

use_dbus=True,

2517

socketfd=None):

1558

interface=None, use_ipv6=True, clients=None,

1559

gnutls_priority=None, use_dbus=True):

2518

1560

self.enabled = False

2519

1561

self.clients = clients

2520

1562

if self.clients is None:

2521

self.clients = {}

1563

self.clients = set()

2522

1564

self.use_dbus = use_dbus

2523

1565

self.gnutls_priority = gnutls_priority

2524

1566

IPv6_TCPServer.__init__(self, server_address,

2525

1567

RequestHandlerClass,

2526

1568

interface = interface,

2527

use_ipv6 = use_ipv6,

2528

socketfd = socketfd)

2529

1569

use_ipv6 = use_ipv6)

2530

1570

def server_activate(self):

2531

1571

if self.enabled:

2532

1572

return socketserver.TCPServer.server_activate(self)

2533

2534

1573

def enable(self):

2535

1574

self.enabled = True

2536

2537

def add_pipe(self, parent_pipe, proc):

1575

def add_pipe(self, parent_pipe):

2538

1576

# Call "handle_ipc" for both data and EOF events

2539

GLib.io_add_watch(

2540

parent_pipe.fileno(),

2541

GLib.IO_IN | GLib.IO_HUP,

2542

functools.partial(self.handle_ipc,

2543

parent_pipe = parent_pipe,

2544

proc = proc))

2545

2546

def handle_ipc(self, source, condition,

2547

parent_pipe=None,

2548

proc = None,

1577

gobject.io_add_watch(parent_pipe.fileno(),

1578

gobject.IO_IN | gobject.IO_HUP,

1579

functools.partial(self.handle_ipc,

1580

parent_pipe = parent_pipe))

1581

1582

def handle_ipc(self, source, condition, parent_pipe=None,

2549

1583

client_object=None):

2550

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

2551

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

2552

# Wait for other process to exit

2553

proc.join()

1584

condition_names = {

1585

gobject.IO_IN: "IN", # There is data to read.

1586

gobject.IO_OUT: "OUT", # Data can be written (without

1587

# blocking).

1588

gobject.IO_PRI: "PRI", # There is urgent data to read.

1589

gobject.IO_ERR: "ERR", # Error condition.

1590

gobject.IO_HUP: "HUP" # Hung up (the connection has been

1591

# broken, usually for pipes and

1592

# sockets).

1593

}

1594

conditions_string = ' | '.join(name

1595

for cond, name in

1596

condition_names.iteritems()

1597

if cond & condition)

1598

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

1599

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

2554

1600

return False

2555

1601

2556

1602

# Read a request from the child

2561

1607

fpr = request[1]

2562

1608

address = request[2]

2563

1609

2564

for c in self.clients.values():

1610

for c in self.clients:

2565

1611

if c.fingerprint == fpr:

2566

1612

client = c

2567

1613

break

2570

1616

"dress: %s", fpr, address)

2571

1617

if self.use_dbus:

2572

1618

# Emit D-Bus signal

2573

mandos_dbus_service.ClientNotFound(fpr,

2574

address[0])

1619

mandos_dbus_service.ClientNotFound(fpr, address[0])

2575

1620

parent_pipe.send(False)

2576

1621

return False

2577

1622

2578

GLib.io_add_watch(

2579

parent_pipe.fileno(),

2580

GLib.IO_IN | GLib.IO_HUP,

2581

functools.partial(self.handle_ipc,

2582

parent_pipe = parent_pipe,

2583

proc = proc,

2584

client_object = client))

1623

gobject.io_add_watch(parent_pipe.fileno(),

1624

gobject.IO_IN | gobject.IO_HUP,

1625

functools.partial(self.handle_ipc,

1626

parent_pipe = parent_pipe,

1627

client_object = client))

2585

1628

parent_pipe.send(True)

2586

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

2587

# same fileno

1629

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

2588

1630

return False

2589

1631

if command == 'funcall':

2590

1632

funcname = request[1]

2591

1633

args = request[2]

2592

1634

kwargs = request[3]

2593

1635

2594

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

2595

funcname)(*args,

2596

**kwargs)))

1636

parent_pipe.send(('data', getattr(client_object, funcname)(*args, **kwargs)))

2597

1637

2598

1638

if command == 'getattr':

2599

1639

attrname = request[1]

2600

if isinstance(client_object.__getattribute__(attrname),

2601

collections.Callable):

2602

parent_pipe.send(('function', ))

1640

if callable(client_object.__getattribute__(attrname)):

1641

parent_pipe.send(('function',))

2603

1642

else:

2604

parent_pipe.send((

2605

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

1643

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

2606

1644

2607

1645

if command == 'setattr':

2608

1646

attrname = request[1]

2612

1650

return True

2613

1651

2614

1652

2615

def rfc3339_duration_to_delta(duration):

2616

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

2617

2618

>>> rfc3339_duration_to_delta("P7D")

2619

datetime.timedelta(7)

2620

>>> rfc3339_duration_to_delta("PT60S")

2621

datetime.timedelta(0, 60)

2622

>>> rfc3339_duration_to_delta("PT60M")

2623

datetime.timedelta(0, 3600)

2624

>>> rfc3339_duration_to_delta("PT24H")

2625

datetime.timedelta(1)

2626

>>> rfc3339_duration_to_delta("P1W")

2627

datetime.timedelta(7)

2628

>>> rfc3339_duration_to_delta("PT5M30S")

2629

datetime.timedelta(0, 330)

2630

>>> rfc3339_duration_to_delta("P1DT3M20S")

2631

datetime.timedelta(1, 200)

2632

"""

2633

2634

# Parsing an RFC 3339 duration with regular expressions is not

2635

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

2636

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

2637

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

2638

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

2639

# avoid excessive use of external libraries.

2640

2641

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

2642

Token = collections.namedtuple("Token", (

2643

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

2644

# a "group" containing digits

2645

"value", # datetime.timedelta or None

2646

"followers")) # Tokens valid after this token

2647

# RFC 3339 "duration" tokens, syntax, and semantics; taken from

2648

# the "duration" ABNF definition in RFC 3339, Appendix A.

2649

token_end = Token(re.compile(r"$"), None, frozenset())

2650

token_second = Token(re.compile(r"(\d+)S"),

2651

datetime.timedelta(seconds=1),

2652

frozenset((token_end, )))

2653

token_minute = Token(re.compile(r"(\d+)M"),

2654

datetime.timedelta(minutes=1),

2655

frozenset((token_second, token_end)))

2656

token_hour = Token(re.compile(r"(\d+)H"),

2657

datetime.timedelta(hours=1),

2658

frozenset((token_minute, token_end)))

2659

token_time = Token(re.compile(r"T"),

2660

None,

2661

frozenset((token_hour, token_minute,

2662

token_second)))

2663

token_day = Token(re.compile(r"(\d+)D"),

2664

datetime.timedelta(days=1),

2665

frozenset((token_time, token_end)))

2666

token_month = Token(re.compile(r"(\d+)M"),

2667

datetime.timedelta(weeks=4),

2668

frozenset((token_day, token_end)))

2669

token_year = Token(re.compile(r"(\d+)Y"),

2670

datetime.timedelta(weeks=52),

2671

frozenset((token_month, token_end)))

2672

token_week = Token(re.compile(r"(\d+)W"),

2673

datetime.timedelta(weeks=1),

2674

frozenset((token_end, )))

2675

token_duration = Token(re.compile(r"P"), None,

2676

frozenset((token_year, token_month,

2677

token_day, token_time,

2678

token_week)))

2679

# Define starting values

2680

value = datetime.timedelta() # Value so far

2681

found_token = None

2682

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

2683

s = duration # String left to parse

2684

# Loop until end token is found

2685

while found_token is not token_end:

2686

# Search for any currently valid tokens

2687

for token in followers:

2688

match = token.regexp.match(s)

2689

if match is not None:

2690

# Token found

2691

if token.value is not None:

2692

# Value found, parse digits

2693

factor = int(match.group(1), 10)

2694

# Add to value so far

2695

value += factor * token.value

2696

# Strip token from string

2697

s = token.regexp.sub("", s, 1)

2698

# Go to found token

2699

found_token = token

2700

# Set valid next tokens

2701

followers = found_token.followers

2702

break

2703

else:

2704

# No currently valid tokens were found

2705

raise ValueError("Invalid RFC 3339 duration: {!r}"

2706

.format(duration))

2707

# End token found

2708

return value

2709

2710

2711

1653

def string_to_delta(interval):

2712

1654

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

2713

1655

2724

1666

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

2725

1667

datetime.timedelta(0, 330)

2726

1668

"""

2727

2728

try:

2729

return rfc3339_duration_to_delta(interval)

2730

except ValueError:

2731

pass

2732

2733

1669

timevalue = datetime.timedelta(0)

2734

1670

for s in interval.split():

2735

1671

try:

2736

suffix = s[-1]

1672

suffix = unicode(s[-1])

2737

1673

value = int(s[:-1])

2738

1674

if suffix == "d":

2739

1675

delta = datetime.timedelta(value)

2746

1682

elif suffix == "w":

2747

1683

delta = datetime.timedelta(0, 0, 0, 0, 0, 0, value)

2748

1684

else:

2749

raise ValueError("Unknown suffix {!r}".format(suffix))

2750

except IndexError as e:

1685

raise ValueError("Unknown suffix %r" % suffix)

1686

except (ValueError, IndexError) as e:

2751

1687

raise ValueError(*(e.args))

2752

1688

timevalue += delta

2753

1689

return timevalue

2754

1690

2755

1691

1692

def if_nametoindex(interface):

1693

"""Call the C function if_nametoindex(), or equivalent

1694

1695

Note: This function cannot accept a unicode string."""

1696

global if_nametoindex

1697

try:

1698

if_nametoindex = (ctypes.cdll.LoadLibrary

1699

(ctypes.util.find_library("c"))

1700

.if_nametoindex)

1701

except (OSError, AttributeError):

1702

logger.warning("Doing if_nametoindex the hard way")

1703

def if_nametoindex(interface):

1704

"Get an interface index the hard way, i.e. using fcntl()"

1705

SIOCGIFINDEX = 0x8933 # From /usr/include/linux/sockios.h

1706

with contextlib.closing(socket.socket()) as s:

1707

ifreq = fcntl.ioctl(s, SIOCGIFINDEX,

1708

struct.pack(str("16s16x"),

1709

interface))

1710

interface_index = struct.unpack(str("I"),

1711

ifreq[16:20])[0]

1712

return interface_index

1713

return if_nametoindex(interface)

1714

1715

2756

1716

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

2757

1717

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

2758

1718

2766

1726

sys.exit()

2767

1727

if not noclose:

2768

1728

# Close all standard open file descriptors

2769

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

1729

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

2770

1730

if not stat.S_ISCHR(os.fstat(null).st_mode):

2771

1731

raise OSError(errno.ENODEV,

2772

"{} not a character device"

2773

.format(os.devnull))

1732

"%s not a character device"

1733

% os.path.devnull)

2774

1734

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

2775

1735

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

2776

1736

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

2785

1745

2786

1746

parser = argparse.ArgumentParser()

2787

1747

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

2788

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

1748

version = "%%(prog)s %s" % version,

2789

1749

help="show version number and exit")

2790

1750

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

2791

1751

help="Bind to interface IF")

2797

1757

help="Run self-test")

2798

1758

parser.add_argument("--debug", action="store_true",

2799

1759

help="Debug mode; run in foreground and log"

2800

" to terminal", default=None)

1760

" to terminal")

2801

1761

parser.add_argument("--debuglevel", metavar="LEVEL",

2802

1762

help="Debug level for stdout output")

2803

1763

parser.add_argument("--priority", help="GnuTLS"

2810

1770

" files")

2811

1771

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

2812

1772

dest="use_dbus", help="Do not provide D-Bus"

2813

" system bus interface", default=None)

1773

" system bus interface")

2814

1774

parser.add_argument("--no-ipv6", action="store_false",

2815

dest="use_ipv6", help="Do not use IPv6",

2816

default=None)

2817

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

2818

dest="restore", help="Do not restore stored"

2819

" state", default=None)

2820

parser.add_argument("--socket", type=int,

2821

help="Specify a file descriptor to a network"

2822

" socket to use instead of creating one")

2823

parser.add_argument("--statedir", metavar="DIR",

2824

help="Directory to save/restore state in")

2825

parser.add_argument("--foreground", action="store_true",

2826

help="Run in foreground", default=None)

2827

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

2828

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

2829

default=None)

2830

1775

dest="use_ipv6", help="Do not use IPv6")

2831

1776

options = parser.parse_args()

2832

1777

2833

1778

if options.check:

2834

1779

import doctest

2835

fail_count, test_count = doctest.testmod()

2836

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

1780

doctest.testmod()

1781

sys.exit()

2837

1782

2838

1783

# Default values for config file for server-global settings

2839

1784

server_defaults = { "interface": "",

2841

1786

"port": "",

2842

1787

"debug": "False",

2843

1788

"priority":

2844

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

2845

":+SIGN-DSA-SHA256",

1789

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

2846

1790

"servicename": "Mandos",

2847

1791

"use_dbus": "True",

2848

1792

"use_ipv6": "True",

2849

1793

"debuglevel": "",

2850

"restore": "True",

2851

"socket": "",

2852

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

2853

"foreground": "False",

2854

"zeroconf": "True",

2855

}

1794

}

2856

1795

2857

1796

# Parse config file for server-global settings

2858

1797

server_config = configparser.SafeConfigParser(server_defaults)

2859

1798

del server_defaults

2860

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

1799

server_config.read(os.path.join(options.configdir,

1800

"mandos.conf"))

2861

1801

# Convert the SafeConfigParser object to a dict

2862

1802

server_settings = server_config.defaults()

2863

1803

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

2864

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

1804

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

2865

1805

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

2866

1806

option)

2867

1807

if server_settings["port"]:

2868

1808

server_settings["port"] = server_config.getint("DEFAULT",

2869

1809

"port")

2870

if server_settings["socket"]:

2871

server_settings["socket"] = server_config.getint("DEFAULT",

2872

"socket")

2873

# Later, stdin will, and stdout and stderr might, be dup'ed

2874

# over with an opened os.devnull. But we don't want this to

2875

# happen with a supplied network socket.

2876

if 0 <= server_settings["socket"] <= 2:

2877

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

2878

["socket"])

2879

1810

del server_config

2880

1811

2881

1812

# Override the settings from the config file with command line

2882

1813

# options, if set.

2883

1814

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

2884

"priority", "servicename", "configdir", "use_dbus",

2885

"use_ipv6", "debuglevel", "restore", "statedir",

2886

"socket", "foreground", "zeroconf"):

1815

"priority", "servicename", "configdir",

1816

"use_dbus", "use_ipv6", "debuglevel"):

2887

1817

value = getattr(options, option)

2888

1818

if value is not None:

2889

1819

server_settings[option] = value

2890

1820

del options

2891

1821

# Force all strings to be unicode

2892

1822

for option in server_settings.keys():

2893

if isinstance(server_settings[option], bytes):

2894

server_settings[option] = (server_settings[option]

2895

.decode("utf-8"))

2896

# Force all boolean options to be boolean

2897

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

2898

"foreground", "zeroconf"):

2899

server_settings[option] = bool(server_settings[option])

2900

# Debug implies foreground

2901

if server_settings["debug"]:

2902

server_settings["foreground"] = True

1823

if type(server_settings[option]) is str:

1824

server_settings[option] = unicode(server_settings[option])

2903

1825

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

2904

1826

2905

1827

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

2906

1828

2907

if (not server_settings["zeroconf"]

2908

and not (server_settings["port"]

2909

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

2910

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

2911

2912

1829

# For convenience

2913

1830

debug = server_settings["debug"]

2914

1831

debuglevel = server_settings["debuglevel"]

2915

1832

use_dbus = server_settings["use_dbus"]

2916

1833

use_ipv6 = server_settings["use_ipv6"]

2917

stored_state_path = os.path.join(server_settings["statedir"],

2918

stored_state_file)

2919

foreground = server_settings["foreground"]

2920

zeroconf = server_settings["zeroconf"]

2921

2922

if debug:

2923

initlogger(debug, logging.DEBUG)

2924

else:

2925

if not debuglevel:

2926

initlogger(debug)

2927

else:

2928

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

2929

initlogger(debug, level)

2930

1834

2931

1835

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

2932

syslogger.setFormatter(

2933

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

2934

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

2935

server_settings["servicename"])))

1836

syslogger.setFormatter(logging.Formatter

1837

('Mandos (%s) [%%(process)d]:'

1838

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

1839

% server_settings["servicename"]))

2936

1840

2937

1841

# Parse config file with clients

2938

client_config = configparser.SafeConfigParser(Client

2939

.client_defaults)

1842

client_defaults = { "timeout": "5m",

1843

"extended_timeout": "15m",

1844

"interval": "2m",

1845

"checker": "fping -q -- %%(host)s",

1846

"host": "",

1847

"approval_delay": "0s",

1848

"approval_duration": "1s",

1849

}

1850

client_config = configparser.SafeConfigParser(client_defaults)

2940

1851

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

2941

1852

"clients.conf"))

2942

1853

2943

1854

global mandos_dbus_service

2944

1855

mandos_dbus_service = None

2945

1856

2946

socketfd = None

2947

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

2948

socketfd = server_settings["socket"]

2949

tcp_server = MandosServer(

2950

(server_settings["address"], server_settings["port"]),

2951

ClientHandler,

2952

interface=(server_settings["interface"] or None),

2953

use_ipv6=use_ipv6,

2954

gnutls_priority=server_settings["priority"],

2955

use_dbus=use_dbus,

2956

socketfd=socketfd)

2957

if not foreground:

2958

pidfilename = "/run/mandos.pid"

2959

if not os.path.isdir("/run/."):

2960

pidfilename = "/var/run/mandos.pid"

2961

pidfile = None

1857

tcp_server = MandosServer((server_settings["address"],

1858

server_settings["port"]),

1859

ClientHandler,

1860

interface=(server_settings["interface"]

1861

or None),

1862

use_ipv6=use_ipv6,

1863

gnutls_priority=

1864

server_settings["priority"],

1865

use_dbus=use_dbus)

1866

if not debug:

1867

pidfilename = "/var/run/mandos.pid"

2962

1868

try:

2963

pidfile = codecs.open(pidfilename, "w", encoding="utf-8")

2964

except IOError as e:

2965

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

2966

exc_info=e)

1869

pidfile = open(pidfilename, "w")

1870

except IOError:

1871

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

2967

1872

2968

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

2969

("mandos", "mandos"),

2970

("nobody", "nogroup")):

1873

try:

1874

uid = pwd.getpwnam("_mandos").pw_uid

1875

gid = pwd.getpwnam("_mandos").pw_gid

1876

except KeyError:

2971

1877

try:

2972

uid = pwd.getpwnam(name).pw_uid

2973

gid = pwd.getpwnam(group).pw_gid

2974

break

1878

uid = pwd.getpwnam("mandos").pw_uid

1879

gid = pwd.getpwnam("mandos").pw_gid

2975

1880

except KeyError:

2976

continue

2977

else:

2978

uid = 65534

2979

gid = 65534

1881

try:

1882

uid = pwd.getpwnam("nobody").pw_uid

1883

gid = pwd.getpwnam("nobody").pw_gid

1884

except KeyError:

1885

uid = 65534

1886

gid = 65534

2980

1887

try:

2981

1888

os.setgid(gid)

2982

1889

os.setuid(uid)

2983

if debug:

2984

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

2985

gid))

2986

1890

except OSError as error:

2987

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

2988

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

2989

if error.errno != errno.EPERM:

2990

raise

1891

if error[0] != errno.EPERM:

1892

raise error

1893

1894

if not debug and not debuglevel:

1895

syslogger.setLevel(logging.WARNING)

1896

console.setLevel(logging.WARNING)

1897

if debuglevel:

1898

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

1899

syslogger.setLevel(level)

1900

console.setLevel(level)

2991

1901

2992

1902

if debug:

2993

1903

# Enable all possible GnuTLS debugging

2994

1904

2995

1905

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

2996

1906

# - GnuTLS manual

2997

gnutls.global_set_log_level(11)

1907

gnutls.library.functions.gnutls_global_set_log_level(11)

2998

1908

2999

@gnutls.log_func

1909

@gnutls.library.types.gnutls_log_func

3000

1910

def debug_gnutls(level, string):

3001

1911

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

3002

1912

3003

gnutls.global_set_log_function(debug_gnutls)

1913

(gnutls.library.functions

1914

.gnutls_global_set_log_function(debug_gnutls))

3004

1915

3005

1916

# Redirect stdin so all checkers get /dev/null

3006

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

1917

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

3007

1918

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

3008

1919

if null > 2:

3009

1920

os.close(null)

1921

else:

1922

# No console logging

1923

logger.removeHandler(console)

3010

1924

3011

1925

# Need to fork before connecting to D-Bus

3012

if not foreground:

1926

if not debug:

3013

1927

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

3014

1928

daemon()

3015

1929

3016

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

3017

# to inform GLib that threads will be used.

3018

GLib.threads_init()

3019

3020

1930

global main_loop

3021

1931

# From the Avahi example code

3022

DBusGMainLoop(set_as_default=True)

3023

main_loop = GLib.MainLoop()

1932

DBusGMainLoop(set_as_default=True )

1933

main_loop = gobject.MainLoop()

3024

1934

bus = dbus.SystemBus()

3025

1935

# End of Avahi example code

3026

1936

if use_dbus:

3027

1937

try:

3028

bus_name = dbus.service.BusName("se.recompile.Mandos",

3029

bus,

3030

do_not_queue=True)

3031

old_bus_name = dbus.service.BusName(

3032

"se.bsnet.fukt.Mandos", bus,

3033

do_not_queue=True)

3034

except dbus.exceptions.DBusException as e:

3035

logger.error("Disabling D-Bus:", exc_info=e)

1938

bus_name = dbus.service.BusName("se.bsnet.fukt.Mandos",

1939

bus, do_not_queue=True)

1940

bus_name2 = dbus.service.BusName("se.recompile.Mandos",

1941

bus, do_not_queue=True)

1942

except dbus.exceptions.NameExistsException as e:

1943

logger.error(unicode(e) + ", disabling D-Bus")

3036

1944

use_dbus = False

3037

1945

server_settings["use_dbus"] = False

3038

1946

tcp_server.use_dbus = False

3039

if zeroconf:

3040

protocol = avahi.PROTO_INET6 if use_ipv6 else avahi.PROTO_INET

3041

service = AvahiServiceToSyslog(

3042

name = server_settings["servicename"],

3043

servicetype = "_mandos._tcp",

3044

protocol = protocol,

3045

bus = bus)

3046

if server_settings["interface"]:

3047

service.interface = if_nametoindex(

3048

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

1947

protocol = avahi.PROTO_INET6 if use_ipv6 else avahi.PROTO_INET

1948

service = AvahiService(name = server_settings["servicename"],

1949

servicetype = "_mandos._tcp",

1950

protocol = protocol, bus = bus)

1951

if server_settings["interface"]:

1952

service.interface = (if_nametoindex

1953

(str(server_settings["interface"])))

3049

1954

3050

1955

global multiprocessing_manager

3051

1956

multiprocessing_manager = multiprocessing.Manager()

3052

1957

3053

1958

client_class = Client

3054

1959

if use_dbus:

3055

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

3056

3057

client_settings = Client.config_parser(client_config)

3058

old_client_settings = {}

3059

clients_data = {}

3060

3061

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

3062

global wnull

3063

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

3064

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

3065

# mode

3066

if debug or not foreground:

3067

wnull.close()

3068

3069

# Get client data and settings from last running state.

3070

if server_settings["restore"]:

3071

try:

3072

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

3073

if sys.version_info.major == 2:

3074

clients_data, old_client_settings = pickle.load(

3075

stored_state)

3076

else:

3077

bytes_clients_data, bytes_old_client_settings = (

3078

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

3079

### Fix bytes to strings

3080

## clients_data

3081

# .keys()

3082

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

3083

if isinstance(key, bytes)

3084

else key): value

3085

for key, value in

3086

bytes_clients_data.items() }

3087

del bytes_clients_data

3088

for key in clients_data:

3089

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

3090

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

3091

for k, v in

3092

clients_data[key].items() }

3093

clients_data[key] = value

3094

# .client_structure

3095

value["client_structure"] = [

3096

(s.decode("utf-8")

3097

if isinstance(s, bytes)

3098

else s) for s in

3099

value["client_structure"] ]

3100

# .name & .host

3101

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

3102

if isinstance(value[k], bytes):

3103

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

3104

## old_client_settings

3105

# .keys()

3106

old_client_settings = {

3107

(key.decode("utf-8")

3108

if isinstance(key, bytes)

3109

else key): value

3110

for key, value in

3111

bytes_old_client_settings.items() }

3112

del bytes_old_client_settings

3113

# .host

3114

for value in old_client_settings.values():

3115

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

3116

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

3117

.decode("utf-8"))

3118

os.remove(stored_state_path)

3119

except IOError as e:

3120

if e.errno == errno.ENOENT:

3121

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

3122

" {}".format(os.strerror(e.errno)))

3123

else:

3124

logger.critical("Could not load persistent state:",

3125

exc_info=e)

3126

raise

3127

except EOFError as e:

3128

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

3129

"EOFError:",

3130

exc_info=e)

3131

3132

with PGPEngine() as pgp:

3133

for client_name, client in clients_data.items():

3134

# Skip removed clients

3135

if client_name not in client_settings:

3136

continue

3137

3138

# Decide which value to use after restoring saved state.

3139

# We have three different values: Old config file,

3140

# new config file, and saved state.

3141

# New config value takes precedence if it differs from old

3142

# config value, otherwise use saved state.

3143

for name, value in client_settings[client_name].items():

3144

try:

3145

# For each value in new config, check if it

3146

# differs from the old config value (Except for

3147

# the "secret" attribute)

3148

if (name != "secret"

3149

and (value !=

3150

old_client_settings[client_name][name])):

3151

client[name] = value

3152

except KeyError:

3153

pass

3154

3155

# Clients who has passed its expire date can still be

3156

# enabled if its last checker was successful. A Client

3157

# whose checker succeeded before we stored its state is

3158

# assumed to have successfully run all checkers during

3159

# downtime.

3160

if client["enabled"]:

3161

if datetime.datetime.utcnow() >= client["expires"]:

3162

if not client["last_checked_ok"]:

3163

logger.warning(

3164

"disabling client {} - Client never "

3165

"performed a successful checker".format(

3166

client_name))

3167

client["enabled"] = False

3168

elif client["last_checker_status"] != 0:

3169

logger.warning(

3170

"disabling client {} - Client last"

3171

" checker failed with error code"

3172

" {}".format(

3173

client_name,

3174

client["last_checker_status"]))

3175

client["enabled"] = False

3176

else:

3177

client["expires"] = (

3178

datetime.datetime.utcnow()

3179

+ client["timeout"])

3180

logger.debug("Last checker succeeded,"

3181

" keeping {} enabled".format(

3182

client_name))

1960

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

1961

def client_config_items(config, section):

1962

special_settings = {

1963

"approved_by_default":

1964

lambda: config.getboolean(section,

1965

"approved_by_default"),

1966

}

1967

for name, value in config.items(section):

3183

1968

try:

3184

client["secret"] = pgp.decrypt(

3185

client["encrypted_secret"],

3186

client_settings[client_name]["secret"])

3187

except PGPError:

3188

# If decryption fails, we use secret from new settings

3189

logger.debug("Failed to decrypt {} old secret".format(

3190

client_name))

3191

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

3192

["secret"])

3193

3194

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

3195

for client_name in (set(old_client_settings)

3196

- set(client_settings)):

3197

del clients_data[client_name]

3198

for client_name in (set(client_settings)

3199

- set(old_client_settings)):

3200

clients_data[client_name] = client_settings[client_name]

3201

3202

# Create all client objects

3203

for client_name, client in clients_data.items():

3204

tcp_server.clients[client_name] = client_class(

3205

name = client_name,

3206

settings = client,

3207

server_settings = server_settings)

3208

1969

yield (name, special_settings[name]())

1970

except KeyError:

1971

yield (name, value)

1972

1973

tcp_server.clients.update(set(

1974

client_class(name = section,

1975

config= dict(client_config_items(

1976

client_config, section)))

1977

for section in client_config.sections()))

3209

1978

if not tcp_server.clients:

3210

1979

logger.warning("No clients defined")

3211

3212

if not foreground:

3213

if pidfile is not None:

3214

pid = os.getpid()

3215

try:

3216

with pidfile:

3217

print(pid, file=pidfile)

3218

except IOError:

3219

logger.error("Could not write to file %r with PID %d",

3220

pidfilename, pid)

3221

del pidfile

1980

1981

if not debug:

1982

try:

1983

with pidfile:

1984

pid = os.getpid()

1985

pidfile.write(str(pid) + "\n".encode("utf-8"))

1986

del pidfile

1987

except IOError:

1988

logger.error("Could not write to file %r with PID %d",

1989

pidfilename, pid)

1990

except NameError:

1991

# "pidfile" was never created

1992

pass

3222

1993

del pidfilename

1994

1995

signal.signal(signal.SIGINT, signal.SIG_IGN)

3223

1996

3224

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

3225

GLib.unix_signal_add(GLib.PRIORITY_HIGH, termsig,

3226

lambda: main_loop.quit() and False)

1997

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

1998

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

3227

1999

3228

2000

if use_dbus:

3229

3230

@alternate_dbus_interfaces(

3231

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

3232

class MandosDBusService(DBusObjectWithObjectManager):

2001

class MandosDBusService(dbus.service.Object):

3233

2002

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

3234

3235

2003

def __init__(self):

3236

2004

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

3237

3238

_interface = "se.recompile.Mandos"

2005

_interface = "se.bsnet.fukt.Mandos"

3239

2006

3240

2007

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

3241

2008

def ClientAdded(self, objpath):

3247

2014

"D-Bus signal"

3248

2015

pass

3249

2016

3250

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

3251

"true"})

3252

2017

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

3253

2018

def ClientRemoved(self, objpath, name):

3254

2019

"D-Bus signal"

3255

2020

pass

3256

2021

3257

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

3258

"true"})

3259

2022

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

3260

2023

def GetAllClients(self):

3261

2024

"D-Bus method"

3262

return dbus.Array(c.dbus_object_path for c in

3263

tcp_server.clients.values())

2025

return dbus.Array(c.dbus_object_path

2026

for c in tcp_server.clients)

3264

2027

3265

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

3266

"true"})

3267

2028

@dbus.service.method(_interface,

3268

2029

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

3269

2030

def GetAllClientsWithProperties(self):

3270

2031

"D-Bus method"

3271

2032

return dbus.Dictionary(

3272

{ c.dbus_object_path: c.GetAll(

3273

"se.recompile.Mandos.Client")

3274

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

2033

((c.dbus_object_path, c.GetAll(""))

2034

for c in tcp_server.clients),

3275

2035

signature="oa{sv}")

3276

2036

3277

2037

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

3278

2038

def RemoveClient(self, object_path):

3279

2039

"D-Bus method"

3280

for c in tcp_server.clients.values():

2040

for c in tcp_server.clients:

3281

2041

if c.dbus_object_path == object_path:

3282

del tcp_server.clients[c.name]

2042

tcp_server.clients.remove(c)

3283

2043

c.remove_from_connection()

3284

# Don't signal the disabling

2044

# Don't signal anything except ClientRemoved

3285

2045

c.disable(quiet=True)

3286

# Emit D-Bus signal for removal

3287

self.client_removed_signal(c)

2046

# Emit D-Bus signal

2047

self.ClientRemoved(object_path, c.name)

3288

2048

return

3289

2049

raise KeyError(object_path)

3290

2050

3291

2051

del _interface

3292

3293

@dbus.service.method(dbus.OBJECT_MANAGER_IFACE,

3294

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

3295

def GetManagedObjects(self):

3296

"""D-Bus method"""

3297

return dbus.Dictionary(

3298

{ client.dbus_object_path:

3299

dbus.Dictionary(

3300

{ interface: client.GetAll(interface)

3301

for interface in

3302

client._get_all_interface_names()})

3303

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

3304

3305

def client_added_signal(self, client):

3306

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

3307

if use_dbus:

3308

# New standard signal

3309

self.InterfacesAdded(

3310

client.dbus_object_path,

3311

dbus.Dictionary(

3312

{ interface: client.GetAll(interface)

3313

for interface in

3314

client._get_all_interface_names()}))

3315

# Old signal

3316

self.ClientAdded(client.dbus_object_path)

3317

3318

def client_removed_signal(self, client):

3319

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

3320

if use_dbus:

3321

# New standard signal

3322

self.InterfacesRemoved(

3323

client.dbus_object_path,

3324

client._get_all_interface_names())

3325

# Old signal

3326

self.ClientRemoved(client.dbus_object_path,

3327

client.name)

3328

2052

3329

mandos_dbus_service = MandosDBusService()

2053

class MandosDBusServiceTransitional(MandosDBusService):

2054

__metaclass__ = transitional_dbus_metaclass

2055

mandos_dbus_service = MandosDBusServiceTransitional()

3330

2056

3331

# Save modules to variables to exempt the modules from being

3332

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

3333

mp = multiprocessing

3334

wn = wnull

3335

2057

def cleanup():

3336

2058

"Cleanup function; run on exit"

3337

if zeroconf:

3338

service.cleanup()

3339

3340

mp.active_children()

3341

wn.close()

3342

if not (tcp_server.clients or client_settings):

3343

return

3344

3345

# Store client before exiting. Secrets are encrypted with key

3346

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

3347

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

3348

clients = {}

3349

with PGPEngine() as pgp:

3350

for client in tcp_server.clients.values():

3351

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

3352

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

3353

key)

3354

client_dict = {}

3355

3356

# A list of attributes that can not be pickled

3357

# + secret.

3358

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

3359

"checker", "server_settings" }

3360

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

3361

.Object):

3362

exclude.add(name)

3363

3364

client_dict["encrypted_secret"] = (client

3365

.encrypted_secret)

3366

for attr in client.client_structure:

3367

if attr not in exclude:

3368

client_dict[attr] = getattr(client, attr)

3369

3370

clients[client.name] = client_dict

3371

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

3372

3373

try:

3374

with tempfile.NamedTemporaryFile(

3375

mode='wb',

3376

suffix=".pickle",

3377

prefix='clients-',

3378

dir=os.path.dirname(stored_state_path),

3379

delete=False) as stored_state:

3380

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

3381

protocol = 2)

3382

tempname = stored_state.name

3383

os.rename(tempname, stored_state_path)

3384

except (IOError, OSError) as e:

3385

if not debug:

3386

try:

3387

os.remove(tempname)

3388

except NameError:

3389

pass

3390

if e.errno in (errno.ENOENT, errno.EACCES, errno.EEXIST):

3391

logger.warning("Could not save persistent state: {}"

3392

.format(os.strerror(e.errno)))

3393

else:

3394

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

3395

exc_info=e)

3396

raise

3397

3398

# Delete all clients, and settings from config

2059

service.cleanup()

2060

3399

2061

while tcp_server.clients:

3400

name, client = tcp_server.clients.popitem()

2062

client = tcp_server.clients.pop()

3401

2063

if use_dbus:

3402

2064

client.remove_from_connection()

3403

# Don't signal the disabling

2065

client.disable_hook = None

2066

# Don't signal anything except ClientRemoved

3404

2067

client.disable(quiet=True)

3405

# Emit D-Bus signal for removal

3406

2068

if use_dbus:

3407

mandos_dbus_service.client_removed_signal(client)

3408

client_settings.clear()

2069

# Emit D-Bus signal

2070

mandos_dbus_service.ClientRemoved(client.dbus_object_path,

2071

client.name)

3409

2072

3410

2073

atexit.register(cleanup)

3411

2074

3412

for client in tcp_server.clients.values():

2075

for client in tcp_server.clients:

3413

2076

if use_dbus:

3414

# Emit D-Bus signal for adding

3415

mandos_dbus_service.client_added_signal(client)

3416

# Need to initiate checking of clients

3417

if client.enabled:

3418

client.init_checker()

2077

# Emit D-Bus signal

2078

mandos_dbus_service.ClientAdded(client.dbus_object_path)

2079

client.enable()

3419

2080

3420

2081

tcp_server.enable()

3421

2082

tcp_server.server_activate()

3422

2083

3423

2084

# Find out what port we got

3424

if zeroconf:

3425

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

2085

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

3426

2086

if use_ipv6:

3427

2087

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

3428

" flowinfo %d, scope_id %d",

3429

*tcp_server.socket.getsockname())

2088

" flowinfo %d, scope_id %d"

2089

% tcp_server.socket.getsockname())

3430

2090

else: # IPv4

3431

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

3432

*tcp_server.socket.getsockname())

2091

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

2092

% tcp_server.socket.getsockname())

3433

2093

3434

2094

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

3435

2095

3436

2096

try:

3437

if zeroconf:

3438

# From the Avahi example code

3439

try:

3440

service.activate()

3441

except dbus.exceptions.DBusException as error:

3442

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

3443

cleanup()

3444

sys.exit(1)

3445

# End of Avahi example code

2097

# From the Avahi example code

2098

try:

2099

service.activate()

2100

except dbus.exceptions.DBusException as error:

2101

logger.critical("DBusException: %s", error)

2102

cleanup()

2103

sys.exit(1)

2104

# End of Avahi example code

3446

2105

3447

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

3448

lambda *args, **kwargs:

3449

(tcp_server.handle_request

3450

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

2106

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

2107

lambda *args, **kwargs:

2108

(tcp_server.handle_request

2109

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

3451

2110

3452

2111

logger.debug("Starting main loop")

3453

2112

main_loop.run()

3454

2113

except AvahiError as error:

3455

logger.critical("Avahi Error", exc_info=error)

2114

logger.critical("AvahiError: %s", error)

3456

2115

cleanup()

3457

2116

sys.exit(1)

3458

2117

except KeyboardInterrupt: