/mandos/release : revision 237.16.24

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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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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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except ImportError:

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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 = "1.7.5"

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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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136

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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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'--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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version = "1.4.1"

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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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class AvahiError(Exception):

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

283

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self.value = value

284

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

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**kwargs)

286

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

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def __unicode__(self):

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return unicode(repr(self.value))

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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.

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name: string; Example: 'Mandos'

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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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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):

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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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self.interface = interface

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self.name = name

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self.type = servicetype

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self.server = None

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self.bus = bus

341

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self.entry_group_state_changed_match = None

342

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def rename(self, remove=True):

156

def rename(self):

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

345

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if self.rename_count >= self.max_renames:

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

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160

" after %i retries, exiting.",

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self.rename_count)

349

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raise AvahiServiceError("Too many renames")

350

self.name = str(

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self.server.GetAlternativeServiceName(self.name))

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self.rename_count += 1

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self.name = unicode(self.server

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.GetAlternativeServiceName(self.name))

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

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self.name)

355

if remove:

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self.remove()

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syslogger.setFormatter(logging.Formatter

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

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

170

% self.name))

171

self.remove()

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try:

358

173

self.add()

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174

except dbus.exceptions.DBusException as error:

360

if (error.get_dbus_name()

361

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

362

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

363

return self.rename(remove=False)

364

else:

365

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

366

self.cleanup()

367

os._exit(1)

368

175

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

176

self.cleanup()

177

os._exit(1)

178

self.rename_count += 1

369

179

def remove(self):

370

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

371

181

if self.entry_group_state_changed_match is not None:

373

183

self.entry_group_state_changed_match = None

374

184

if self.group is not None:

375

185

self.group.Reset()

376

377

186

def add(self):

378

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

379

188

self.remove()

384

193

avahi.DBUS_INTERFACE_ENTRY_GROUP)

385

194

self.entry_group_state_changed_match = (

386

195

self.group.connect_to_signal(

387

'StateChanged', self.entry_group_state_changed))

196

'StateChanged', self .entry_group_state_changed))

388

197

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

389

198

self.name, self.type)

390

199

self.group.AddService(

396

205

dbus.UInt16(self.port),

397

206

avahi.string_array_to_txt_array(self.TXT))

398

207

self.group.Commit()

399

400

208

def entry_group_state_changed(self, state, error):

401

209

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

402

210

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

408

216

self.rename()

409

217

elif state == avahi.ENTRY_GROUP_FAILURE:

410

218

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

411

str(error))

412

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

413

219

unicode(error))

220

raise AvahiGroupError("State changed: %s"

221

% unicode(error))

414

222

def cleanup(self):

415

223

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

416

224

if self.group is not None:

417

225

try:

418

226

self.group.Free()

419

227

except (dbus.exceptions.UnknownMethodException,

420

dbus.exceptions.DBusException):

228

dbus.exceptions.DBusException) as e:

421

229

pass

422

230

self.group = None

423

231

self.remove()

424

425

232

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

426

233

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

427

234

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

428

bad_states = {

429

avahi.SERVER_INVALID: "Zeroconf server invalid",

430

avahi.SERVER_REGISTERING: None,

431

avahi.SERVER_COLLISION: "Zeroconf server name collision",

432

avahi.SERVER_FAILURE: "Zeroconf server failure",

433

}

235

bad_states = { avahi.SERVER_INVALID:

236

"Zeroconf server invalid",

237

avahi.SERVER_REGISTERING: None,

238

avahi.SERVER_COLLISION:

239

"Zeroconf server name collision",

240

avahi.SERVER_FAILURE:

241

"Zeroconf server failure" }

434

242

if state in bad_states:

435

243

if bad_states[state] is not None:

436

244

if error is None:

439

247

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

440

248

self.cleanup()

441

249

elif state == avahi.SERVER_RUNNING:

442

try:

443

self.add()

444

except dbus.exceptions.DBusException as error:

445

if (error.get_dbus_name()

446

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

447

logger.info("Local Zeroconf service name"

448

" collision.")

449

return self.rename(remove=False)

450

else:

451

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

452

self.cleanup()

453

os._exit(1)

250

self.add()

454

251

else:

455

252

if error is None:

456

253

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

457

254

else:

458

255

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

459

460

256

def activate(self):

461

257

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

462

258

if self.server is None:

466

262

follow_name_owner_changes=True),

467

263

avahi.DBUS_INTERFACE_SERVER)

468

264

self.server.connect_to_signal("StateChanged",

469

self.server_state_changed)

265

self.server_state_changed)

470

266

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

471

267

472

268

473

class AvahiServiceToSyslog(AvahiService):

474

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

475

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

476

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

477

syslogger.setFormatter(logging.Formatter(

478

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

479

.format(self.name)))

480

return ret

481

482

# Pretend that we have a GnuTLS module

483

class GnuTLS(object):

484

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

485

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

486

487

_library = ctypes.cdll.LoadLibrary(

488

ctypes.util.find_library("gnutls"))

489

_need_version = b"3.3.0"

490

def __init__(self):

491

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

492

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

493

# happens.

494

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

495

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

496

.format(self._need_version))

497

498

# Unless otherwise indicated, the constants and types below are

499

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

500

501

# Constants

502

E_SUCCESS = 0

503

E_INTERRUPTED = -52

504

E_AGAIN = -28

505

CRT_OPENPGP = 2

506

CLIENT = 2

507

SHUT_RDWR = 0

508

CRD_CERTIFICATE = 1

509

E_NO_CERTIFICATE_FOUND = -49

510

OPENPGP_FMT_RAW = 0 # gnutls/openpgp.h

511

512

# Types

513

class session_int(ctypes.Structure):

514

_fields_ = []

515

session_t = ctypes.POINTER(session_int)

516

class certificate_credentials_st(ctypes.Structure):

517

_fields_ = []

518

certificate_credentials_t = ctypes.POINTER(

519

certificate_credentials_st)

520

certificate_type_t = ctypes.c_int

521

class datum_t(ctypes.Structure):

522

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

523

('size', ctypes.c_uint)]

524

class openpgp_crt_int(ctypes.Structure):

525

_fields_ = []

526

openpgp_crt_t = ctypes.POINTER(openpgp_crt_int)

527

openpgp_crt_fmt_t = ctypes.c_int # gnutls/openpgp.h

528

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

529

credentials_type_t = ctypes.c_int

530

transport_ptr_t = ctypes.c_void_p

531

close_request_t = ctypes.c_int

532

533

# Exceptions

534

class Error(Exception):

535

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

536

# exception might be raised from within GnuTLS.__init__,

537

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

538

# global variable has happened.

539

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

540

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

541

# code is passed, convert it to a string with

542

# gnutls.strerror()

543

self.code = code

544

if message is None and code is not None:

545

message = GnuTLS.strerror(code)

546

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

547

message, *args)

548

549

class CertificateSecurityError(Error):

550

pass

551

552

# Classes

553

class Credentials(object):

554

def __init__(self):

555

self._c_object = gnutls.certificate_credentials_t()

556

gnutls.certificate_allocate_credentials(

557

ctypes.byref(self._c_object))

558

self.type = gnutls.CRD_CERTIFICATE

559

560

def __del__(self):

561

gnutls.certificate_free_credentials(self._c_object)

562

563

class ClientSession(object):

564

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

565

self._c_object = gnutls.session_t()

566

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

567

gnutls.set_default_priority(self._c_object)

568

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

569

gnutls.handshake_set_private_extensions(self._c_object,

570

True)

571

self.socket = socket

572

if credentials is None:

573

credentials = gnutls.Credentials()

574

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

575

ctypes.cast(credentials._c_object,

576

ctypes.c_void_p))

577

self.credentials = credentials

578

579

def __del__(self):

580

gnutls.deinit(self._c_object)

581

582

def handshake(self):

583

return gnutls.handshake(self._c_object)

584

585

def send(self, data):

586

data = bytes(data)

587

data_len = len(data)

588

while data_len > 0:

589

data_len -= gnutls.record_send(self._c_object,

590

data[-data_len:],

591

data_len)

592

593

def bye(self):

594

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

595

596

# Error handling functions

597

def _error_code(result):

598

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

599

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

600

if result >= 0:

601

return result

602

if result == gnutls.E_NO_CERTIFICATE_FOUND:

603

raise gnutls.CertificateSecurityError(code = result)

604

raise gnutls.Error(code = result)

605

606

def _retry_on_error(result, func, arguments):

607

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

608

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

609

while result < 0:

610

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

611

return _error_code(result)

612

result = func(*arguments)

613

return result

614

615

# Unless otherwise indicated, the function declarations below are

616

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

617

618

# Functions

619

priority_set_direct = _library.gnutls_priority_set_direct

620

priority_set_direct.argtypes = [session_t, ctypes.c_char_p,

621

ctypes.POINTER(ctypes.c_char_p)]

622

priority_set_direct.restype = _error_code

623

624

init = _library.gnutls_init

625

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

626

init.restype = _error_code

627

628

set_default_priority = _library.gnutls_set_default_priority

629

set_default_priority.argtypes = [session_t]

630

set_default_priority.restype = _error_code

631

632

record_send = _library.gnutls_record_send

633

record_send.argtypes = [session_t, ctypes.c_void_p,

634

ctypes.c_size_t]

635

record_send.restype = ctypes.c_ssize_t

636

record_send.errcheck = _retry_on_error

637

638

certificate_allocate_credentials = (

639

_library.gnutls_certificate_allocate_credentials)

640

certificate_allocate_credentials.argtypes = [

641

ctypes.POINTER(certificate_credentials_t)]

642

certificate_allocate_credentials.restype = _error_code

643

644

certificate_free_credentials = (

645

_library.gnutls_certificate_free_credentials)

646

certificate_free_credentials.argtypes = [certificate_credentials_t]

647

certificate_free_credentials.restype = None

648

649

handshake_set_private_extensions = (

650

_library.gnutls_handshake_set_private_extensions)

651

handshake_set_private_extensions.argtypes = [session_t,

652

ctypes.c_int]

653

handshake_set_private_extensions.restype = None

654

655

credentials_set = _library.gnutls_credentials_set

656

credentials_set.argtypes = [session_t, credentials_type_t,

657

ctypes.c_void_p]

658

credentials_set.restype = _error_code

659

660

strerror = _library.gnutls_strerror

661

strerror.argtypes = [ctypes.c_int]

662

strerror.restype = ctypes.c_char_p

663

664

certificate_type_get = _library.gnutls_certificate_type_get

665

certificate_type_get.argtypes = [session_t]

666

certificate_type_get.restype = _error_code

667

668

certificate_get_peers = _library.gnutls_certificate_get_peers

669

certificate_get_peers.argtypes = [session_t,

670

ctypes.POINTER(ctypes.c_uint)]

671

certificate_get_peers.restype = ctypes.POINTER(datum_t)

672

673

global_set_log_level = _library.gnutls_global_set_log_level

674

global_set_log_level.argtypes = [ctypes.c_int]

675

global_set_log_level.restype = None

676

677

global_set_log_function = _library.gnutls_global_set_log_function

678

global_set_log_function.argtypes = [log_func]

679

global_set_log_function.restype = None

680

681

deinit = _library.gnutls_deinit

682

deinit.argtypes = [session_t]

683

deinit.restype = None

684

685

handshake = _library.gnutls_handshake

686

handshake.argtypes = [session_t]

687

handshake.restype = _error_code

688

handshake.errcheck = _retry_on_error

689

690

transport_set_ptr = _library.gnutls_transport_set_ptr

691

transport_set_ptr.argtypes = [session_t, transport_ptr_t]

692

transport_set_ptr.restype = None

693

694

bye = _library.gnutls_bye

695

bye.argtypes = [session_t, close_request_t]

696

bye.restype = _error_code

697

bye.errcheck = _retry_on_error

698

699

check_version = _library.gnutls_check_version

700

check_version.argtypes = [ctypes.c_char_p]

701

check_version.restype = ctypes.c_char_p

702

703

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

704

705

openpgp_crt_init = _library.gnutls_openpgp_crt_init

706

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

707

openpgp_crt_init.restype = _error_code

708

709

openpgp_crt_import = _library.gnutls_openpgp_crt_import

710

openpgp_crt_import.argtypes = [openpgp_crt_t,

711

ctypes.POINTER(datum_t),

712

openpgp_crt_fmt_t]

713

openpgp_crt_import.restype = _error_code

714

715

openpgp_crt_verify_self = _library.gnutls_openpgp_crt_verify_self

716

openpgp_crt_verify_self.argtypes = [openpgp_crt_t, ctypes.c_uint,

717

ctypes.POINTER(ctypes.c_uint)]

718

openpgp_crt_verify_self.restype = _error_code

719

720

openpgp_crt_deinit = _library.gnutls_openpgp_crt_deinit

721

openpgp_crt_deinit.argtypes = [openpgp_crt_t]

722

openpgp_crt_deinit.restype = None

723

724

openpgp_crt_get_fingerprint = (

725

_library.gnutls_openpgp_crt_get_fingerprint)

726

openpgp_crt_get_fingerprint.argtypes = [openpgp_crt_t,

727

ctypes.c_void_p,

728

ctypes.POINTER(

729

ctypes.c_size_t)]

730

openpgp_crt_get_fingerprint.restype = _error_code

731

732

# Remove non-public functions

733

del _error_code, _retry_on_error

734

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

735

gnutls = GnuTLS()

736

737

def call_pipe(connection, # : multiprocessing.Connection

738

func, *args, **kwargs):

739

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

740

741

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

742

return value on the provided multiprocessing.Connection.

743

"""

744

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

745

connection.close()

746

269

def _timedelta_to_milliseconds(td):

270

"Convert a datetime.timedelta() to milliseconds"

271

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

272

+ (td.seconds * 1000)

273

+ (td.microseconds // 1000))

274

747

275

class Client(object):

748

276

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

749

277

750

278

Attributes:

751

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

279

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

752

280

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

753

281

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

754

282

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

755

283

to see if the client lives.

756

284

'None' if no process is running.

757

checker_callback_tag: a GLib event source tag, or None

285

checker_callback_tag: a gobject event source tag, or None

758

286

checker_command: string; External command which is run to check

759

287

if client lives. %() expansions are done at

760

288

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

761

289

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

762

checker_initiator_tag: a GLib event source tag, or None

290

checker_initiator_tag: a gobject event source tag, or None

763

291

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

764

client_structure: Object describing what attributes a client has

765

and is used for storing the client at exit

766

292

current_checker_command: string; current running checker_command

767

disable_initiator_tag: a GLib event source tag, or None

293

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

294

disable_initiator_tag: a gobject event source tag, or None

768

295

enabled: bool()

769

296

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

770

297

uniquely identify the client

772

299

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

773

300

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

774

301

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

775

last_checker_status: integer between 0 and 255 reflecting exit

776

status of last checker. -1 reflects crashed

777

checker, -2 means no checker completed yet.

778

last_checker_signal: The signal which killed the last checker, if

779

last_checker_status is -1

780

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

302

last_enabled: datetime.datetime(); (UTC)

781

303

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

782

304

D-Bus identifiers

783

305

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

784

306

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

785

307

until this client is disabled

786

extended_timeout: extra long timeout when secret has been sent

308

extended_timeout: extra long timeout when password has been sent

787

309

runtime_expansions: Allowed attributes for runtime expansion.

788

310

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

789

311

disabled, or None

790

server_settings: The server_settings dict from main()

791

312

"""

792

313

793

314

runtime_expansions = ("approval_delay", "approval_duration",

794

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

795

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

796

"last_approval_request", "last_checked_ok",

315

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

316

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

797

317

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

798

client_defaults = {

799

"timeout": "PT5M",

800

"extended_timeout": "PT15M",

801

"interval": "PT2M",

802

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

803

"host": "",

804

"approval_delay": "PT0S",

805

"approval_duration": "PT1S",

806

"approved_by_default": "True",

807

"enabled": "True",

808

}

809

810

@staticmethod

811

def config_parser(config):

812

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

813

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

814

with exceptions for any special settings as defined above.

815

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

816

value given the same arguments.

817

"""

818

settings = {}

819

for client_name in config.sections():

820

section = dict(config.items(client_name))

821

client = settings[client_name] = {}

822

823

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

824

# Reformat values from string types to Python types

825

client["approved_by_default"] = config.getboolean(

826

client_name, "approved_by_default")

827

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

828

"enabled")

829

830

# Uppercase and remove spaces from fingerprint for later

831

# comparison purposes with return value from the

832

# fingerprint() function

833

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

834

.replace(" ", ""))

835

if "secret" in section:

836

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

837

.encode("utf-8"),

838

"base64")

839

elif "secfile" in section:

840

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

841

(section["secfile"])),

842

"rb") as secfile:

843

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

844

else:

845

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

846

.format(section))

847

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

848

client["extended_timeout"] = string_to_delta(

849

section["extended_timeout"])

850

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

851

client["approval_delay"] = string_to_delta(

852

section["approval_delay"])

853

client["approval_duration"] = string_to_delta(

854

section["approval_duration"])

855

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

856

client["last_approval_request"] = None

857

client["last_checked_ok"] = None

858

client["last_checker_status"] = -2

859

860

return settings

861

862

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

318

319

def timeout_milliseconds(self):

320

"Return the 'timeout' attribute in milliseconds"

321

return _timedelta_to_milliseconds(self.timeout)

322

323

def extended_timeout_milliseconds(self):

324

"Return the 'extended_timeout' attribute in milliseconds"

325

return _timedelta_to_milliseconds(self.extended_timeout)

326

327

def interval_milliseconds(self):

328

"Return the 'interval' attribute in milliseconds"

329

return _timedelta_to_milliseconds(self.interval)

330

331

def approval_delay_milliseconds(self):

332

return _timedelta_to_milliseconds(self.approval_delay)

333

334

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

335

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

336

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

337

attribute."""

863

338

self.name = name

864

if server_settings is None:

865

server_settings = {}

866

self.server_settings = server_settings

867

# adding all client settings

868

for setting, value in settings.items():

869

setattr(self, setting, value)

870

871

if self.enabled:

872

if not hasattr(self, "last_enabled"):

873

self.last_enabled = datetime.datetime.utcnow()

874

if not hasattr(self, "expires"):

875

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

876

+ self.timeout)

877

else:

878

self.last_enabled = None

879

self.expires = None

880

339

if config is None:

340

config = {}

881

341

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

342

# Uppercase and remove spaces from fingerprint for later

343

# comparison purposes with return value from the fingerprint()

344

# function

345

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

346

.replace(" ", ""))

882

347

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

883

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

884

datetime.datetime.utcnow())

885

886

# attributes specific for this server instance

348

if "secret" in config:

349

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

350

elif "secfile" in config:

351

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

352

(config["secfile"])),

353

"rb") as secfile:

354

self.secret = secfile.read()

355

else:

356

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

357

% self.name)

358

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

359

self.created = datetime.datetime.utcnow()

360

self.enabled = False

361

self.last_approval_request = None

362

self.last_enabled = None

363

self.last_checked_ok = None

364

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

365

self.extended_timeout = string_to_delta(config

366

["extended_timeout"])

367

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

368

self.disable_hook = disable_hook

887

369

self.checker = None

888

370

self.checker_initiator_tag = None

889

371

self.disable_initiator_tag = None

372

self.expires = None

890

373

self.checker_callback_tag = None

374

self.checker_command = config["checker"]

891

375

self.current_checker_command = None

892

self.approved = None

376

self.last_connect = None

377

self._approved = None

378

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

379

True)

893

380

self.approvals_pending = 0

894

self.changedstate = multiprocessing_manager.Condition(

895

multiprocessing_manager.Lock())

896

self.client_structure = [attr

897

for attr in self.__dict__.keys()

898

if not attr.startswith("_")]

899

self.client_structure.append("client_structure")

900

901

for name, t in inspect.getmembers(

902

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

903

if not name.startswith("_"):

904

self.client_structure.append(name)

381

self.approval_delay = string_to_delta(

382

config["approval_delay"])

383

self.approval_duration = string_to_delta(

384

config["approval_duration"])

385

self.changedstate = (multiprocessing_manager

386

.Condition(multiprocessing_manager

387

.Lock()))

905

388

906

# Send notice to process children that client state has changed

907

389

def send_changedstate(self):

908

with self.changedstate:

909

self.changedstate.notify_all()

390

self.changedstate.acquire()

391

self.changedstate.notify_all()

392

self.changedstate.release()

910

393

911

394

def enable(self):

912

395

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

913

396

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

914

397

# Already enabled

915

398

return

399

self.send_changedstate()

400

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

401

# and every interval from then on.

402

self.checker_initiator_tag = (gobject.timeout_add

403

(self.interval_milliseconds(),

404

self.start_checker))

405

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

916

406

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

407

self.disable_initiator_tag = (gobject.timeout_add

408

(self.timeout_milliseconds(),

409

self.disable))

917

410

self.enabled = True

918

411

self.last_enabled = datetime.datetime.utcnow()

919

self.init_checker()

920

self.send_changedstate()

412

# Also start a new checker *right now*.

413

self.start_checker()

921

414

922

415

def disable(self, quiet=True):

923

416

"""Disable this client."""

924

417

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

925

418

return False

926

419

if not quiet:

420

self.send_changedstate()

421

if not quiet:

927

422

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

928

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

929

GLib.source_remove(self.disable_initiator_tag)

423

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

424

gobject.source_remove(self.disable_initiator_tag)

930

425

self.disable_initiator_tag = None

931

426

self.expires = None

932

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

933

GLib.source_remove(self.checker_initiator_tag)

427

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

428

gobject.source_remove(self.checker_initiator_tag)

934

429

self.checker_initiator_tag = None

935

430

self.stop_checker()

431

if self.disable_hook:

432

self.disable_hook(self)

936

433

self.enabled = False

937

if not quiet:

938

self.send_changedstate()

939

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

434

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

940

435

return False

941

436

942

437

def __del__(self):

438

self.disable_hook = None

943

439

self.disable()

944

440

945

def init_checker(self):

946

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

947

# and every interval from then on.

948

if self.checker_initiator_tag is not None:

949

GLib.source_remove(self.checker_initiator_tag)

950

self.checker_initiator_tag = GLib.timeout_add(

951

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

952

self.start_checker)

953

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

954

if self.disable_initiator_tag is not None:

955

GLib.source_remove(self.disable_initiator_tag)

956

self.disable_initiator_tag = GLib.timeout_add(

957

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

958

# Also start a new checker *right now*.

959

self.start_checker()

960

961

def checker_callback(self, source, condition, connection,

962

command):

441

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

963

442

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

964

443

self.checker_callback_tag = None

965

444

self.checker = None

966

# Read return code from connection (see call_pipe)

967

returncode = connection.recv()

968

connection.close()

969

970

if returncode >= 0:

971

self.last_checker_status = returncode

972

self.last_checker_signal = None

973

if self.last_checker_status == 0:

445

if os.WIFEXITED(condition):

446

exitstatus = os.WEXITSTATUS(condition)

447

if exitstatus == 0:

974

448

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

975

449

vars(self))

976

450

self.checked_ok()

977

451

else:

978

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

452

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

453

vars(self))

979

454

else:

980

self.last_checker_status = -1

981

self.last_checker_signal = -returncode

982

455

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

983

456

vars(self))

984

return False

985

986

def checked_ok(self):

987

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

988

self.last_checked_ok = datetime.datetime.utcnow()

989

self.last_checker_status = 0

990

self.last_checker_signal = None

991

self.bump_timeout()

992

993

def bump_timeout(self, timeout=None):

994

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

457

458

def checked_ok(self, timeout=None):

459

"""Bump up the timeout for this client.

460

461

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

462

alive and well.

463

"""

995

464

if timeout is None:

996

465

timeout = self.timeout

466

self.last_checked_ok = datetime.datetime.utcnow()

997

467

if self.disable_initiator_tag is not None:

998

GLib.source_remove(self.disable_initiator_tag)

999

self.disable_initiator_tag = None

468

gobject.source_remove(self.disable_initiator_tag)

1000

469

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

1001

self.disable_initiator_tag = GLib.timeout_add(

1002

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

470

self.disable_initiator_tag = (gobject.timeout_add

471

(_timedelta_to_milliseconds

472

(timeout), self.disable))

1003

473

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

1004

474

1005

475

def need_approval(self):

1011

481

If a checker already exists, leave it running and do

1012

482

nothing."""

1013

483

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

1014

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

1015

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

1016

# would inevitably timeout, since no checker would get a

1017

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

484

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

485

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

486

# client would inevitably timeout, since no checker would get

487

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

1018

488

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

1019

489

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

1020

490

# should be.

1021

491

1022

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

1023

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

1024

self.checker.join()

1025

self.checker = None

492

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

493

try:

494

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

495

except (AttributeError, OSError) as error:

496

if (isinstance(error, OSError)

497

and error.errno != errno.ECHILD):

498

raise error

499

else:

500

if pid:

501

logger.warning("Checker was a zombie")

502

gobject.source_remove(self.checker_callback_tag)

503

self.checker_callback(pid, status,

504

self.current_checker_command)

1026

505

# Start a new checker if needed

1027

506

if self.checker is None:

1028

# Escape attributes for the shell

1029

escaped_attrs = {

1030

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

1031

for attr in self.runtime_expansions }

1032

507

try:

1033

command = self.checker_command % escaped_attrs

1034

except TypeError as error:

1035

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

1036

self.checker_command,

1037

exc_info=error)

1038

return True # Try again later

508

# In case checker_command has exactly one % operator

509

command = self.checker_command % self.host

510

except TypeError:

511

# Escape attributes for the shell

512

escaped_attrs = dict(

513

(attr,

514

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

515

errors=

516

'replace')))

517

for attr in

518

self.runtime_expansions)

519

520

try:

521

command = self.checker_command % escaped_attrs

522

except TypeError as error:

523

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

524

' %s', self.checker_command, error)

525

return True # Try again later

1039

526

self.current_checker_command = command

1040

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

1041

self.name)

1042

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

1043

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

1044

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

1045

# always replaced by /dev/null.)

1046

# The exception is when not debugging but nevertheless

1047

# running in the foreground; use the previously

1048

# created wnull.

1049

popen_args = { "close_fds": True,

1050

"shell": True,

1051

"cwd": "/" }

1052

if (not self.server_settings["debug"]

1053

and self.server_settings["foreground"]):

1054

popen_args.update({"stdout": wnull,

1055

"stderr": wnull })

1056

pipe = multiprocessing.Pipe(duplex = False)

1057

self.checker = multiprocessing.Process(

1058

target = call_pipe,

1059

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

1060

kwargs = popen_args)

1061

self.checker.start()

1062

self.checker_callback_tag = GLib.io_add_watch(

1063

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

1064

self.checker_callback, pipe[0], command)

1065

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

527

try:

528

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

529

command, self.name)

530

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

531

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

532

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

533

# always replaced by /dev/null.)

534

self.checker = subprocess.Popen(command,

535

close_fds=True,

536

shell=True, cwd="/")

537

self.checker_callback_tag = (gobject.child_watch_add

538

(self.checker.pid,

539

self.checker_callback,

540

data=command))

541

# The checker may have completed before the gobject

542

# watch was added. Check for this.

543

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

544

if pid:

545

gobject.source_remove(self.checker_callback_tag)

546

self.checker_callback(pid, status, command)

547

except OSError as error:

548

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

549

error)

550

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

1066

551

return True

1067

552

1068

553

def stop_checker(self):

1069

554

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

1070

555

if self.checker_callback_tag:

1071

GLib.source_remove(self.checker_callback_tag)

556

gobject.source_remove(self.checker_callback_tag)

1072

557

self.checker_callback_tag = None

1073

558

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

1074

559

return

1075

560

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

1076

self.checker.terminate()

561

try:

562

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

563

#time.sleep(0.5)

564

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

565

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

566

except OSError as error:

567

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

568

raise

1077

569

self.checker = None

1078

570

1079

571

1080

def dbus_service_property(dbus_interface,

1081

signature="v",

1082

access="readwrite",

1083

byte_arrays=False):

572

def dbus_service_property(dbus_interface, signature="v",

573

access="readwrite", byte_arrays=False):

1084

574

"""Decorators for marking methods of a DBusObjectWithProperties to

1085

575

become properties on the D-Bus.

1086

576

1095

585

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

1096

586

if byte_arrays and signature != "ay":

1097

587

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

1098

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

1099

588

" signature %r" % signature)

1100

589

def decorator(func):

1101

590

func._dbus_is_property = True

1102

591

func._dbus_interface = dbus_interface

1107

596

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

1108

597

func._dbus_get_args_options = {'byte_arrays': byte_arrays }

1109

598

return func

1110

1111

return decorator

1112

1113

1114

def dbus_interface_annotations(dbus_interface):

1115

"""Decorator for marking functions returning interface annotations

1116

1117

Usage:

1118

1119

@dbus_interface_annotations("org.example.Interface")

1120

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

1121

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

1122

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

1123

"false"}

1124

"""

1125

1126

def decorator(func):

1127

func._dbus_is_interface = True

1128

func._dbus_interface = dbus_interface

1129

func._dbus_name = dbus_interface

1130

return func

1131

1132

return decorator

1133

1134

1135

def dbus_annotations(annotations):

1136

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

1137

Usage:

1138

1139

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

1140

"org.freedesktop.DBus.Property."

1141

"EmitsChangedSignal": "false"})

1142

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

1143

access="r")

1144

def Property_dbus_property(self):

1145

return dbus.Boolean(False)

1146

1147

See also the DBusObjectWithAnnotations class.

1148

"""

1149

1150

def decorator(func):

1151

func._dbus_annotations = annotations

1152

return func

1153

1154

599

return decorator

1155

600

1156

601

1157

602

class DBusPropertyException(dbus.exceptions.DBusException):

1158

603

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

1159

604

"""

1160

pass

605

def __unicode__(self):

606

return unicode(str(self))

1161

607

1162

608

1163

609

class DBusPropertyAccessException(DBusPropertyException):

1172

618

pass

1173

619

1174

620

1175

class DBusObjectWithAnnotations(dbus.service.Object):

1176

"""A D-Bus object with annotations.

1177

1178

Classes inheriting from this can use the dbus_annotations

1179

decorator to add annotations to methods or signals.

1180

"""

1181

1182

@staticmethod

1183

def _is_dbus_thing(thing):

1184

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

1185

1186

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

1187

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

1188

"""

1189

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

1190

False)

1191

1192

def _get_all_dbus_things(self, thing):

1193

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

1194

"""

1195

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

1196

athing.__get__(self))

1197

for cls in self.__class__.__mro__

1198

for name, athing in

1199

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

1200

1201

@dbus.service.method(dbus.INTROSPECTABLE_IFACE,

1202

out_signature = "s",

1203

path_keyword = 'object_path',

1204

connection_keyword = 'connection')

1205

def Introspect(self, object_path, connection):

1206

"""Overloading of standard D-Bus method.

1207

1208

Inserts annotation tags on methods and signals.

1209

"""

1210

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

1211

connection)

1212

try:

1213

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

1214

1215

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

1216

# Add annotation tags

1217

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

1218

for tag in if_tag.getElementsByTagName(typ):

1219

annots = dict()

1220

for name, prop in (self.

1221

_get_all_dbus_things(typ)):

1222

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

1223

and prop._dbus_interface

1224

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

1225

annots.update(getattr(

1226

prop, "_dbus_annotations", {}))

1227

for name, value in annots.items():

1228

ann_tag = document.createElement(

1229

"annotation")

1230

ann_tag.setAttribute("name", name)

1231

ann_tag.setAttribute("value", value)

1232

tag.appendChild(ann_tag)

1233

# Add interface annotation tags

1234

for annotation, value in dict(

1235

itertools.chain.from_iterable(

1236

annotations().items()

1237

for name, annotations

1238

in self._get_all_dbus_things("interface")

1239

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

1240

)).items():

1241

ann_tag = document.createElement("annotation")

1242

ann_tag.setAttribute("name", annotation)

1243

ann_tag.setAttribute("value", value)

1244

if_tag.appendChild(ann_tag)

1245

# Fix argument name for the Introspect method itself

1246

if (if_tag.getAttribute("name")

1247

== dbus.INTROSPECTABLE_IFACE):

1248

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

1249

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

1250

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

1251

if (arg.getAttribute("direction")

1252

== "out"):

1253

arg.setAttribute("name",

1254

"xml_data")

1255

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

1256

document.unlink()

1257

except (AttributeError, xml.dom.DOMException,

1258

xml.parsers.expat.ExpatError) as error:

1259

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

1260

exc_info=error)

1261

return xmlstring

1262

1263

1264

class DBusObjectWithProperties(DBusObjectWithAnnotations):

621

class DBusObjectWithProperties(dbus.service.Object):

1265

622

"""A D-Bus object with properties.

1266

623

1267

624

Classes inheriting from this can use the dbus_service_property

1269

626

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

1270

627

"""

1271

628

629

@staticmethod

630

def _is_dbus_property(obj):

631

return getattr(obj, "_dbus_is_property", False)

632

633

def _get_all_dbus_properties(self):

634

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

635

"""

636

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

637

for cls in self.__class__.__mro__

638

for name, prop in

639

inspect.getmembers(cls, self._is_dbus_property))

640

1272

641

def _get_dbus_property(self, interface_name, property_name):

1273

642

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

1274

643

property with the specified name and interface.

1275

644

"""

1276

for cls in self.__class__.__mro__:

1277

for name, value in inspect.getmembers(

1278

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

645

for cls in self.__class__.__mro__:

646

for name, value in (inspect.getmembers

647

(cls, self._is_dbus_property)):

1279

648

if (value._dbus_name == property_name

1280

649

and value._dbus_interface == interface_name):

1281

650

return value.__get__(self)

1282

651

1283

652

# No such property

1284

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

1285

self.dbus_object_path, interface_name, property_name))

1286

1287

@classmethod

1288

def _get_all_interface_names(cls):

1289

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

1290

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

1291

"_dbus_interface", None)

1292

for x in (inspect.getmro(cls))

1293

for attr in dir(x))

1294

if name is not None)

1295

1296

@dbus.service.method(dbus.PROPERTIES_IFACE,

1297

in_signature="ss",

653

raise DBusPropertyNotFound(self.dbus_object_path + ":"

654

+ interface_name + "."

655

+ property_name)

656

657

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

1298

658

out_signature="v")

1299

659

def Get(self, interface_name, property_name):

1300

660

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

1318

678

# The byte_arrays option is not supported yet on

1319

679

# signatures other than "ay".

1320

680

if prop._dbus_signature != "ay":

1321

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

1322

"'ay' signature {!r}"

1323

.format(prop._dbus_signature))

1324

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

1325

for byte in value))

681

raise ValueError

682

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

683

for byte in value))

1326

684

prop(value)

1327

685

1328

@dbus.service.method(dbus.PROPERTIES_IFACE,

1329

in_signature="s",

686

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

1330

687

out_signature="a{sv}")

1331

688

def GetAll(self, interface_name):

1332

689

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

1334

691

1335

692

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

1336

693

"""

1337

properties = {}

1338

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

694

all = {}

695

for name, prop in self._get_all_dbus_properties():

1339

696

if (interface_name

1340

697

and interface_name != prop._dbus_interface):

1341

698

# Interface non-empty but did not match

1345

702

continue

1346

703

value = prop()

1347

704

if not hasattr(value, "variant_level"):

1348

properties[name] = value

705

all[name] = value

1349

706

continue

1350

properties[name] = type(value)(

1351

value, variant_level = value.variant_level + 1)

1352

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

1353

1354

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

1355

def PropertiesChanged(self, interface_name, changed_properties,

1356

invalidated_properties):

1357

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

1358

standard.

1359

"""

1360

pass

707

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

708

value.variant_level+1)

709

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

1361

710

1362

711

@dbus.service.method(dbus.INTROSPECTABLE_IFACE,

1363

712

out_signature="s",

1364

713

path_keyword='object_path',

1365

714

connection_keyword='connection')

1366

715

def Introspect(self, object_path, connection):

1367

"""Overloading of standard D-Bus method.

1368

1369

Inserts property tags and interface annotation tags.

716

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

1370

717

"""

1371

xmlstring = DBusObjectWithAnnotations.Introspect(self,

1372

object_path,

1373

connection)

718

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

719

connection)

1374

720

try:

1375

721

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

1376

1377

722

def make_tag(document, name, prop):

1378

723

e = document.createElement("property")

1379

724

e.setAttribute("name", name)

1380

725

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

1381

726

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

1382

727

return e

1383

1384

728

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

1385

# Add property tags

1386

729

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

1387

730

for name, prop

1388

in self._get_all_dbus_things("property")

731

in self._get_all_dbus_properties()

1389

732

if prop._dbus_interface

1390

733

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

1391

734

if_tag.appendChild(tag)

1392

# Add annotation tags for properties

1393

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

1394

annots = dict()

1395

for name, prop in self._get_all_dbus_things(

1396

"property"):

1397

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

1398

and prop._dbus_interface

1399

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

1400

annots.update(getattr(

1401

prop, "_dbus_annotations", {}))

1402

for name, value in annots.items():

1403

ann_tag = document.createElement(

1404

"annotation")

1405

ann_tag.setAttribute("name", name)

1406

ann_tag.setAttribute("value", value)

1407

tag.appendChild(ann_tag)

1408

735

# Add the names to the return values for the

1409

736

# "org.freedesktop.DBus.Properties" methods

1410

737

if (if_tag.getAttribute("name")

1425

752

except (AttributeError, xml.dom.DOMException,

1426

753

xml.parsers.expat.ExpatError) as error:

1427

754

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

1428

exc_info=error)

1429

return xmlstring

1430

1431

try:

1432

dbus.OBJECT_MANAGER_IFACE

1433

except AttributeError:

1434

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

1435

1436

class DBusObjectWithObjectManager(DBusObjectWithAnnotations):

1437

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

1438

1439

Classes inheriting from this exposes the standard

1440

GetManagedObjects call and the InterfacesAdded and

1441

InterfacesRemoved signals on the standard

1442

"org.freedesktop.DBus.ObjectManager" interface.

1443

1444

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

1445

manually.

1446

"""

1447

@dbus.service.method(dbus.OBJECT_MANAGER_IFACE,

1448

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

1449

def GetManagedObjects(self):

1450

"""This function must be overridden"""

1451

raise NotImplementedError()

1452

1453

@dbus.service.signal(dbus.OBJECT_MANAGER_IFACE,

1454

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

1455

def InterfacesAdded(self, object_path, interfaces_and_properties):

1456

pass

1457

1458

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

1459

def InterfacesRemoved(self, object_path, interfaces):

1460

pass

1461

1462

@dbus.service.method(dbus.INTROSPECTABLE_IFACE,

1463

out_signature = "s",

1464

path_keyword = 'object_path',

1465

connection_keyword = 'connection')

1466

def Introspect(self, object_path, connection):

1467

"""Overloading of standard D-Bus method.

1468

1469

Override return argument name of GetManagedObjects to be

1470

"objpath_interfaces_and_properties"

1471

"""

1472

xmlstring = DBusObjectWithAnnotations.Introspect(self,

1473

object_path,

1474

connection)

1475

try:

1476

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

1477

1478

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

1479

# Fix argument name for the GetManagedObjects method

1480

if (if_tag.getAttribute("name")

1481

== dbus.OBJECT_MANAGER_IFACE):

1482

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

1483

if (cn.getAttribute("name")

1484

== "GetManagedObjects"):

1485

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

1486

if (arg.getAttribute("direction")

1487

== "out"):

1488

arg.setAttribute(

1489

"name",

1490

"objpath_interfaces"

1491

"_and_properties")

1492

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

1493

document.unlink()

1494

except (AttributeError, xml.dom.DOMException,

1495

xml.parsers.expat.ExpatError) as error:

1496

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

1497

exc_info = error)

1498

return xmlstring

1499

1500

def datetime_to_dbus(dt, variant_level=0):

755

error)

756

return xmlstring

757

758

759

def datetime_to_dbus (dt, variant_level=0):

1501

760

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

1502

761

if dt is None:

1503

762

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

1504

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

1505

1506

1507

def alternate_dbus_interfaces(alt_interface_names, deprecate=True):

1508

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

1509

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

1510

interface names according to the "alt_interface_names" mapping.

1511

Usage:

1512

1513

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

1514

"net.example.AlternateInterface"})

1515

class SampleDBusObject(dbus.service.Object):

1516

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

1517

def SampleDBusMethod():

1518

pass

1519

1520

The above "SampleDBusMethod" on "SampleDBusObject" will be

1521

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

1522

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

1523

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

1524

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

1525

1526

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

1527

(from DBusObjectWithProperties) and interfaces (from the

1528

dbus_interface_annotations decorator).

763

return dbus.String(dt.isoformat(),

764

variant_level=variant_level)

765

766

class AlternateDBusNamesMetaclass(DBusObjectWithProperties

767

.__metaclass__):

768

"""Applied to an empty subclass of a D-Bus object, this metaclass

769

will add additional D-Bus attributes matching a certain pattern.

1529

770

"""

1530

1531

def wrapper(cls):

1532

for orig_interface_name, alt_interface_name in (

1533

alt_interface_names.items()):

1534

attr = {}

1535

interface_names = set()

1536

# Go though all attributes of the class

1537

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

771

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

772

# Go through all the base classes which could have D-Bus

773

# methods, signals, or properties in them

774

for base in (b for b in bases

775

if issubclass(b, dbus.service.Object)):

776

# Go though all attributes of the base class

777

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

1538

778

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

1539

779

# with the wrong interface name

1540

780

if (not hasattr(attribute, "_dbus_interface")

1541

or not attribute._dbus_interface.startswith(

1542

orig_interface_name)):

781

or not attribute._dbus_interface

782

.startswith("se.recompile.Mandos")):

1543

783

continue

1544

784

# Create an alternate D-Bus interface name based on

1545

785

# the current name

1546

alt_interface = attribute._dbus_interface.replace(

1547

orig_interface_name, alt_interface_name)

1548

interface_names.add(alt_interface)

786

alt_interface = (attribute._dbus_interface

787

.replace("se.recompile.Mandos",

788

"se.bsnet.fukt.Mandos"))

1549

789

# Is this a D-Bus signal?

1550

790

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

1551

# Extract the original non-method undecorated

1552

# function by black magic

1553

if sys.version_info.major == 2:

1554

nonmethod_func = (dict(

791

# Extract the original non-method function by

792

# black magic

793

nonmethod_func = (dict(

1555

794

zip(attribute.func_code.co_freevars,

1556

attribute.__closure__))

1557

["func"].cell_contents)

1558

else:

1559

nonmethod_func = (dict(

1560

zip(attribute.__code__.co_freevars,

1561

attribute.__closure__))

1562

["func"].cell_contents)

795

attribute.__closure__))["func"]

796

.cell_contents)

1563

797

# Create a new, but exactly alike, function

1564

798

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

1565

799

# with the alternate D-Bus interface name

1566

new_function = copy_function(nonmethod_func)

1567

new_function = (dbus.service.signal(

1568

alt_interface,

1569

attribute._dbus_signature)(new_function))

1570

# Copy annotations, if any

1571

try:

1572

new_function._dbus_annotations = dict(

1573

attribute._dbus_annotations)

1574

except AttributeError:

1575

pass

800

new_function = (dbus.service.signal

801

(alt_interface,

802

attribute._dbus_signature)

803

(types.FunctionType(

804

nonmethod_func.func_code,

805

nonmethod_func.func_globals,

806

nonmethod_func.func_name,

807

nonmethod_func.func_defaults,

808

nonmethod_func.func_closure)))

1576

809

# Define a creator of a function to call both the

1577

# original and alternate functions, so both the

1578

# original and alternate signals gets sent when

1579

# the function is called

810

# old and new functions, so both the old and new

811

# signals gets sent when the function is called

1580

812

def fixscope(func1, func2):

1581

813

"""This function is a scope container to pass

1582

814

func1 and func2 to the "call_both" function

1583

815

outside of its arguments"""

1584

1585

@functools.wraps(func2)

1586

816

def call_both(*args, **kwargs):

1587

817

"""This function will emit two D-Bus

1588

818

signals by calling func1 and func2"""

1589

819

func1(*args, **kwargs)

1590

820

func2(*args, **kwargs)

1591

# Make wrapper function look like a D-Bus signal

1592

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

1593

if name.startswith("_dbus_"):

1594

setattr(call_both, name, attr)

1595

1596

821

return call_both

1597

822

# Create the "call_both" function and add it to

1598

823

# the class

1599

attr[attrname] = fixscope(attribute, new_function)

824

attr[attrname] = fixscope(attribute,

825

new_function)

1600

826

# Is this a D-Bus method?

1601

827

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

1602

828

# Create a new, but exactly alike, function

1603

829

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

1604

830

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

1605

831

# to the class.

1606

attr[attrname] = (

1607

dbus.service.method(

1608

alt_interface,

1609

attribute._dbus_in_signature,

1610

attribute._dbus_out_signature)

1611

(copy_function(attribute)))

1612

# Copy annotations, if any

1613

try:

1614

attr[attrname]._dbus_annotations = dict(

1615

attribute._dbus_annotations)

1616

except AttributeError:

1617

pass

832

attr[attrname] = (dbus.service.method

833

(alt_interface,

834

attribute._dbus_in_signature,

835

attribute._dbus_out_signature)

836

(types.FunctionType

837

(attribute.func_code,

838

attribute.func_globals,

839

attribute.func_name,

840

attribute.func_defaults,

841

attribute.func_closure)))

1618

842

# Is this a D-Bus property?

1619

843

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

1620

844

# Create a new, but exactly alike, function

1621

845

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

1622

846

# property with the alternate D-Bus interface

1623

847

# name. Add it to the class.

1624

attr[attrname] = (dbus_service_property(

1625

alt_interface, attribute._dbus_signature,

1626

attribute._dbus_access,

1627

attribute._dbus_get_args_options

1628

["byte_arrays"])

1629

(copy_function(attribute)))

1630

# Copy annotations, if any

1631

try:

1632

attr[attrname]._dbus_annotations = dict(

1633

attribute._dbus_annotations)

1634

except AttributeError:

1635

pass

1636

# Is this a D-Bus interface?

1637

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

1638

# Create a new, but exactly alike, function

1639

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

1640

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

1641

# to the class.

1642

attr[attrname] = (

1643

dbus_interface_annotations(alt_interface)

1644

(copy_function(attribute)))

1645

if deprecate:

1646

# Deprecate all alternate interfaces

1647

iname="_AlternateDBusNames_interface_annotation{}"

1648

for interface_name in interface_names:

1649

1650

@dbus_interface_annotations(interface_name)

1651

def func(self):

1652

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

1653

"true" }

1654

# Find an unused name

1655

for aname in (iname.format(i)

1656

for i in itertools.count()):

1657

if aname not in attr:

1658

attr[aname] = func

1659

break

1660

if interface_names:

1661

# Replace the class with a new subclass of it with

1662

# methods, signals, etc. as created above.

1663

if sys.version_info.major == 2:

1664

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

1665

(cls, ), attr)

1666

else:

1667

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

1668

(cls, ), attr)

1669

return cls

1670

1671

return wrapper

1672

1673

1674

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

1675

"se.bsnet.fukt.Mandos"})

848

attr[attrname] = (dbus_service_property

849

(alt_interface,

850

attribute._dbus_signature,

851

attribute._dbus_access,

852

attribute

853

._dbus_get_args_options

854

["byte_arrays"])

855

(types.FunctionType

856

(attribute.func_code,

857

attribute.func_globals,

858

attribute.func_name,

859

attribute.func_defaults,

860

attribute.func_closure)))

861

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

862

1676

863

class ClientDBus(Client, DBusObjectWithProperties):

1677

864

"""A Client class using D-Bus

1678

865

1682

869

"""

1683

870

1684

871

runtime_expansions = (Client.runtime_expansions

1685

+ ("dbus_object_path", ))

1686

1687

_interface = "se.recompile.Mandos.Client"

872

+ ("dbus_object_path",))

1688

873

1689

874

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

1690

875

1691

876

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

877

self._approvals_pending = 0

1692

878

self.bus = bus

1693

879

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

1694

880

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

1695

881

# the D-Bus

1696

client_object_name = str(self.name).translate(

882

client_object_name = unicode(self.name).translate(

1697

883

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

1698

884

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

1699

self.dbus_object_path = dbus.ObjectPath(

1700

"/clients/" + client_object_name)

885

self.dbus_object_path = (dbus.ObjectPath

886

("/clients/" + client_object_name))

1701

887

DBusObjectWithProperties.__init__(self, self.bus,

1702

888

self.dbus_object_path)

1703

1704

def notifychangeproperty(transform_func, dbus_name,

1705

type_func=lambda x: x,

1706

variant_level=1,

1707

invalidate_only=False,

1708

_interface=_interface):

889

890

def notifychangeproperty(transform_func,

891

dbus_name, type_func=lambda x: x,

892

variant_level=1):

1709

893

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

1710

894

its changes to DBus.

1711

895

1712

896

transform_fun: Function that takes a value and a variant_level

1713

897

and transforms it to a D-Bus type.

1714

898

dbus_name: D-Bus name of the variable

1716

900

to the D-Bus. Default: no transform

1717

901

variant_level: D-Bus variant level. Default: 1

1718

902

"""

1719

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

1720

903

attrname = "_{0}".format(dbus_name)

1721

904

def setter(self, value):

1722

905

if hasattr(self, "dbus_object_path"):

1723

906

if (not hasattr(self, attrname) or

1724

907

type_func(getattr(self, attrname, None))

1725

908

!= type_func(value)):

1726

if invalidate_only:

1727

self.PropertiesChanged(

1728

_interface, dbus.Dictionary(),

1729

dbus.Array((dbus_name, )))

1730

else:

1731

dbus_value = transform_func(

1732

type_func(value),

1733

variant_level = variant_level)

1734

self.PropertyChanged(dbus.String(dbus_name),

1735

dbus_value)

1736

self.PropertiesChanged(

1737

_interface,

1738

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

1739

dbus_value }),

1740

dbus.Array())

909

dbus_value = transform_func(type_func(value),

910

variant_level

911

=variant_level)

912

self.PropertyChanged(dbus.String(dbus_name),

913

dbus_value)

1741

914

setattr(self, attrname, value)

1742

915

1743

916

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

1744

917

918

1745

919

expires = notifychangeproperty(datetime_to_dbus, "Expires")

1746

920

approvals_pending = notifychangeproperty(dbus.Boolean,

1747

921

"ApprovalPending",

1749

923

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

1750

924

last_enabled = notifychangeproperty(datetime_to_dbus,

1751

925

"LastEnabled")

1752

checker = notifychangeproperty(

1753

dbus.Boolean, "CheckerRunning",

1754

type_func = lambda checker: checker is not None)

926

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

927

type_func = lambda checker:

928

checker is not None)

1755

929

last_checked_ok = notifychangeproperty(datetime_to_dbus,

1756

930

"LastCheckedOK")

1757

last_checker_status = notifychangeproperty(dbus.Int16,

1758

"LastCheckerStatus")

1759

931

last_approval_request = notifychangeproperty(

1760

932

datetime_to_dbus, "LastApprovalRequest")

1761

933

approved_by_default = notifychangeproperty(dbus.Boolean,

1762

934

"ApprovedByDefault")

1763

approval_delay = notifychangeproperty(

1764

dbus.UInt64, "ApprovalDelay",

1765

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

935

approval_delay = notifychangeproperty(dbus.UInt16,

936

"ApprovalDelay",

937

type_func =

938

_timedelta_to_milliseconds)

1766

939

approval_duration = notifychangeproperty(

1767

dbus.UInt64, "ApprovalDuration",

1768

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

940

dbus.UInt16, "ApprovalDuration",

941

type_func = _timedelta_to_milliseconds)

1769

942

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

1770

timeout = notifychangeproperty(

1771

dbus.UInt64, "Timeout",

1772

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

943

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

944

type_func =

945

_timedelta_to_milliseconds)

1773

946

extended_timeout = notifychangeproperty(

1774

dbus.UInt64, "ExtendedTimeout",

1775

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

1776

interval = notifychangeproperty(

1777

dbus.UInt64, "Interval",

1778

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

947

dbus.UInt16, "ExtendedTimeout",

948

type_func = _timedelta_to_milliseconds)

949

interval = notifychangeproperty(dbus.UInt16,

950

"Interval",

951

type_func =

952

_timedelta_to_milliseconds)

1779

953

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

1780

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

1781

invalidate_only=True)

1782

954

1783

955

del notifychangeproperty

1784

956

1791

963

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

1792

964

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

1793

965

1794

def checker_callback(self, source, condition,

1795

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

1796

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

1797

connection, command, *args,

1798

**kwargs)

1799

exitstatus = self.last_checker_status

1800

if exitstatus >= 0:

966

def checker_callback(self, pid, condition, command,

967

*args, **kwargs):

968

self.checker_callback_tag = None

969

self.checker = None

970

if os.WIFEXITED(condition):

971

exitstatus = os.WEXITSTATUS(condition)

1801

972

# Emit D-Bus signal

1802

973

self.CheckerCompleted(dbus.Int16(exitstatus),

1803

# This is specific to GNU libC

1804

dbus.Int64(exitstatus << 8),

974

dbus.Int64(condition),

1805

975

dbus.String(command))

1806

976

else:

1807

977

# Emit D-Bus signal

1808

978

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

1809

dbus.Int64(

1810

# This is specific to GNU libC

1811

(exitstatus << 8)

1812

| self.last_checker_signal),

979

dbus.Int64(condition),

1813

980

dbus.String(command))

1814

return ret

981

982

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

983

*args, **kwargs)

1815

984

1816

985

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

1817

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

986

old_checker = self.checker

987

if self.checker is not None:

988

old_checker_pid = self.checker.pid

989

else:

990

old_checker_pid = None

1818

991

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

1819

992

# Only if new checker process was started

1820

993

if (self.checker is not None

1824

997

return r

1825

998

1826

999

def _reset_approved(self):

1827

self.approved = None

1000

self._approved = None

1828

1001

return False

1829

1002

1830

1003

def approve(self, value=True):

1831

self.approved = value

1832

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

1833

* 1000), self._reset_approved)

1834

1004

self.send_changedstate()

1005

self._approved = value

1006

gobject.timeout_add(_timedelta_to_milliseconds

1007

(self.approval_duration),

1008

self._reset_approved)

1009

1835

1010

1836

1011

## D-Bus methods, signals & properties

1837

1838

## Interfaces

1012

_interface = "se.recompile.Mandos.Client"

1839

1013

1840

1014

## Signals

1841

1015

1852

1026

pass

1853

1027

1854

1028

# PropertyChanged - signal

1855

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

1856

1029

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

1857

1030

def PropertyChanged(self, property, value):

1858

1031

"D-Bus signal"

1892

1065

self.checked_ok()

1893

1066

1894

1067

# Enable - method

1895

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

1896

1068

@dbus.service.method(_interface)

1897

1069

def Enable(self):

1898

1070

"D-Bus method"

1899

1071

self.enable()

1900

1072

1901

1073

# StartChecker - method

1902

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

1903

1074

@dbus.service.method(_interface)

1904

1075

def StartChecker(self):

1905

1076

"D-Bus method"

1906

1077

self.start_checker()

1907

1078

1908

1079

# Disable - method

1909

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

1910

1080

@dbus.service.method(_interface)

1911

1081

def Disable(self):

1912

1082

"D-Bus method"

1913

1083

self.disable()

1914

1084

1915

1085

# StopChecker - method

1916

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

1917

1086

@dbus.service.method(_interface)

1918

1087

def StopChecker(self):

1919

1088

self.stop_checker()

1926

1095

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

1927

1096

1928

1097

# ApprovedByDefault - property

1929

@dbus_service_property(_interface,

1930

signature="b",

1098

@dbus_service_property(_interface, signature="b",

1931

1099

access="readwrite")

1932

1100

def ApprovedByDefault_dbus_property(self, value=None):

1933

1101

if value is None: # get

1935

1103

self.approved_by_default = bool(value)

1936

1104

1937

1105

# ApprovalDelay - property

1938

@dbus_service_property(_interface,

1939

signature="t",

1106

@dbus_service_property(_interface, signature="t",

1940

1107

access="readwrite")

1941

1108

def ApprovalDelay_dbus_property(self, value=None):

1942

1109

if value is None: # get

1943

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

1944

* 1000)

1110

return dbus.UInt64(self.approval_delay_milliseconds())

1945

1111

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

1946

1112

1947

1113

# ApprovalDuration - property

1948

@dbus_service_property(_interface,

1949

signature="t",

1114

@dbus_service_property(_interface, signature="t",

1950

1115

access="readwrite")

1951

1116

def ApprovalDuration_dbus_property(self, value=None):

1952

1117

if value is None: # get

1953

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

1954

* 1000)

1118

return dbus.UInt64(_timedelta_to_milliseconds(

1119

self.approval_duration))

1955

1120

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

1956

1121

1957

1122

# Name - property

1958

@dbus_annotations(

1959

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

1960

1123

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

1961

1124

def Name_dbus_property(self):

1962

1125

return dbus.String(self.name)

1963

1126

1964

1127

# Fingerprint - property

1965

@dbus_annotations(

1966

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

1967

1128

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

1968

1129

def Fingerprint_dbus_property(self):

1969

1130

return dbus.String(self.fingerprint)

1970

1131

1971

1132

# Host - property

1972

@dbus_service_property(_interface,

1973

signature="s",

1133

@dbus_service_property(_interface, signature="s",

1974

1134

access="readwrite")

1975

1135

def Host_dbus_property(self, value=None):

1976

1136

if value is None: # get

1977

1137

return dbus.String(self.host)

1978

self.host = str(value)

1138

self.host = value

1979

1139

1980

1140

# Created - property

1981

@dbus_annotations(

1982

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

1983

1141

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

1984

1142

def Created_dbus_property(self):

1985

return datetime_to_dbus(self.created)

1143

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

1986

1144

1987

1145

# LastEnabled - property

1988

1146

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

1990

1148

return datetime_to_dbus(self.last_enabled)

1991

1149

1992

1150

# Enabled - property

1993

@dbus_service_property(_interface,

1994

signature="b",

1151

@dbus_service_property(_interface, signature="b",

1995

1152

access="readwrite")

1996

1153

def Enabled_dbus_property(self, value=None):

1997

1154

if value is None: # get

2002

1159

self.disable()

2003

1160

2004

1161

# LastCheckedOK - property

2005

@dbus_service_property(_interface,

2006

signature="s",

1162

@dbus_service_property(_interface, signature="s",

2007

1163

access="readwrite")

2008

1164

def LastCheckedOK_dbus_property(self, value=None):

2009

1165

if value is not None:

2011

1167

return

2012

1168

return datetime_to_dbus(self.last_checked_ok)

2013

1169

2014

# LastCheckerStatus - property

2015

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

2016

def LastCheckerStatus_dbus_property(self):

2017

return dbus.Int16(self.last_checker_status)

2018

2019

1170

# Expires - property

2020

1171

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

2021

1172

def Expires_dbus_property(self):

2027

1178

return datetime_to_dbus(self.last_approval_request)

2028

1179

2029

1180

# Timeout - property

2030

@dbus_service_property(_interface,

2031

signature="t",

1181

@dbus_service_property(_interface, signature="t",

2032

1182

access="readwrite")

2033

1183

def Timeout_dbus_property(self, value=None):

2034

1184

if value is None: # get

2035

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

2036

old_timeout = self.timeout

1185

return dbus.UInt64(self.timeout_milliseconds())

2037

1186

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

2038

# Reschedule disabling

2039

if self.enabled:

2040

now = datetime.datetime.utcnow()

2041

self.expires += self.timeout - old_timeout

2042

if self.expires <= now:

2043

# The timeout has passed

2044

self.disable()

2045

else:

2046

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

2047

is None):

2048

return

2049

GLib.source_remove(self.disable_initiator_tag)

2050

self.disable_initiator_tag = GLib.timeout_add(

2051

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

2052

self.disable)

1187

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

1188

return

1189

# Reschedule timeout

1190

gobject.source_remove(self.disable_initiator_tag)

1191

self.disable_initiator_tag = None

1192

self.expires = None

1193

time_to_die = _timedelta_to_milliseconds((self

1194

.last_checked_ok

1195

+ self.timeout)

1196

- datetime.datetime

1197

.utcnow())

1198

if time_to_die <= 0:

1199

# The timeout has passed

1200

self.disable()

1201

else:

1202

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

1203

+ datetime.timedelta(milliseconds =

1204

time_to_die))

1205

self.disable_initiator_tag = (gobject.timeout_add

1206

(time_to_die, self.disable))

2053

1207

2054

1208

# ExtendedTimeout - property

2055

@dbus_service_property(_interface,

2056

signature="t",

1209

@dbus_service_property(_interface, signature="t",

2057

1210

access="readwrite")

2058

1211

def ExtendedTimeout_dbus_property(self, value=None):

2059

1212

if value is None: # get

2060

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

2061

* 1000)

1213

return dbus.UInt64(self.extended_timeout_milliseconds())

2062

1214

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

2063

1215

2064

1216

# Interval - property

2065

@dbus_service_property(_interface,

2066

signature="t",

1217

@dbus_service_property(_interface, signature="t",

2067

1218

access="readwrite")

2068

1219

def Interval_dbus_property(self, value=None):

2069

1220

if value is None: # get

2070

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

1221

return dbus.UInt64(self.interval_milliseconds())

2071

1222

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

2072

1223

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

2073

1224

return

2074

if self.enabled:

2075

# Reschedule checker run

2076

GLib.source_remove(self.checker_initiator_tag)

2077

self.checker_initiator_tag = GLib.timeout_add(

2078

value, self.start_checker)

2079

self.start_checker() # Start one now, too

1225

# Reschedule checker run

1226

gobject.source_remove(self.checker_initiator_tag)

1227

self.checker_initiator_tag = (gobject.timeout_add

1228

(value, self.start_checker))

1229

self.start_checker() # Start one now, too

2080

1230

2081

1231

# Checker - property

2082

@dbus_service_property(_interface,

2083

signature="s",

1232

@dbus_service_property(_interface, signature="s",

2084

1233

access="readwrite")

2085

1234

def Checker_dbus_property(self, value=None):

2086

1235

if value is None: # get

2087

1236

return dbus.String(self.checker_command)

2088

self.checker_command = str(value)

1237

self.checker_command = value

2089

1238

2090

1239

# CheckerRunning - property

2091

@dbus_service_property(_interface,

2092

signature="b",

1240

@dbus_service_property(_interface, signature="b",

2093

1241

access="readwrite")

2094

1242

def CheckerRunning_dbus_property(self, value=None):

2095

1243

if value is None: # get

2100

1248

self.stop_checker()

2101

1249

2102

1250

# ObjectPath - property

2103

@dbus_annotations(

2104

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

2105

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

2106

1251

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

2107

1252

def ObjectPath_dbus_property(self):

2108

1253

return self.dbus_object_path # is already a dbus.ObjectPath

2109

1254

2110

1255

# Secret = property

2111

@dbus_annotations(

2112

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

2113

"invalidates"})

2114

@dbus_service_property(_interface,

2115

signature="ay",

2116

access="write",

2117

byte_arrays=True)

1256

@dbus_service_property(_interface, signature="ay",

1257

access="write", byte_arrays=True)

2118

1258

def Secret_dbus_property(self, value):

2119

self.secret = bytes(value)

1259

self.secret = str(value)

2120

1260

2121

1261

del _interface

2122

1262

2126

1266

self._pipe = child_pipe

2127

1267

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

2128

1268

if not self._pipe.recv():

2129

raise KeyError(fpr)

1269

raise KeyError()

2130

1270

2131

1271

def __getattribute__(self, name):

2132

if name == '_pipe':

1272

if(name == '_pipe'):

2133

1273

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

2134

1274

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

2135

1275

data = self._pipe.recv()

2136

1276

if data[0] == 'data':

2137

1277

return data[1]

2138

1278

if data[0] == 'function':

2139

2140

1279

def func(*args, **kwargs):

2141

1280

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

2142

1281

return self._pipe.recv()[1]

2143

2144

1282

return func

2145

1283

2146

1284

def __setattr__(self, name, value):

2147

if name == '_pipe':

1285

if(name == '_pipe'):

2148

1286

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

2149

1287

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

2150

1288

1289

class ClientDBusTransitional(ClientDBus):

1290

__metaclass__ = AlternateDBusNamesMetaclass

2151

1291

2152

1292

class ClientHandler(socketserver.BaseRequestHandler, object):

2153

1293

"""A class to handle client connections.

2158

1298

def handle(self):

2159

1299

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

2160

1300

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

2161

str(self.client_address))

1301

unicode(self.client_address))

2162

1302

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

2163

1303

self.server.child_pipe.fileno())

2164

1304

2165

session = gnutls.ClientSession(self.request)

1305

session = (gnutls.connection

1306

.ClientSession(self.request,

1307

gnutls.connection

1308

.X509Credentials()))

1309

1310

# Note: gnutls.connection.X509Credentials is really a

1311

# generic GnuTLS certificate credentials object so long as

1312

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

1313

# here despite using OpenPGP certificates.

2166

1314

2167

1315

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

2168

1316

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

2172

1320

priority = self.server.gnutls_priority

2173

1321

if priority is None:

2174

1322

priority = "NORMAL"

2175

gnutls.priority_set_direct(session._c_object, priority,

2176

None)

1323

(gnutls.library.functions

1324

.gnutls_priority_set_direct(session._c_object,

1325

priority, None))

2177

1326

2178

1327

# Start communication using the Mandos protocol

2179

1328

# Get protocol number

2181

1330

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

2182

1331

try:

2183

1332

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

2184

raise RuntimeError(line)

1333

raise RuntimeError

2185

1334

except (ValueError, IndexError, RuntimeError) as error:

2186

1335

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

2187

1336

return

2189

1338

# Start GnuTLS connection

2190

1339

try:

2191

1340

session.handshake()

2192

except gnutls.Error as error:

1341

except gnutls.errors.GNUTLSError as error:

2193

1342

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

2194

1343

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

2195

1344

# established. Just abandon the request.

2199

1348

approval_required = False

2200

1349

try:

2201

1350

try:

2202

fpr = self.fingerprint(

2203

self.peer_certificate(session))

2204

except (TypeError, gnutls.Error) as error:

1351

fpr = self.fingerprint(self.peer_certificate

1352

(session))

1353

except (TypeError,

1354

gnutls.errors.GNUTLSError) as error:

2205

1355

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

2206

1356

return

2207

1357

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

2220

1370

while True:

2221

1371

if not client.enabled:

2222

1372

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

2223

client.name)

1373

client.name)

2224

1374

if self.server.use_dbus:

2225

1375

# Emit D-Bus signal

2226

1376

client.Rejected("Disabled")

2227

1377

return

2228

1378

2229

if client.approved or not client.approval_delay:

1379

if client._approved or not client.approval_delay:

2230

1380

#We are approved or approval is disabled

2231

1381

break

2232

elif client.approved is None:

1382

elif client._approved is None:

2233

1383

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

2234

1384

client.name)

2235

1385

if self.server.use_dbus:

2236

1386

# Emit D-Bus signal

2237

1387

client.NeedApproval(

2238

client.approval_delay.total_seconds()

2239

* 1000, client.approved_by_default)

1388

client.approval_delay_milliseconds(),

1389

client.approved_by_default)

2240

1390

else:

2241

1391

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

2242

1392

client.name)

2248

1398

#wait until timeout or approved

2249

1399

time = datetime.datetime.now()

2250

1400

client.changedstate.acquire()

2251

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

1401

(client.changedstate.wait

1402

(float(client._timedelta_to_milliseconds(delay)

1403

/ 1000)))

2252

1404

client.changedstate.release()

2253

1405

time2 = datetime.datetime.now()

2254

1406

if (time2 - time) >= delay:

2265

1417

else:

2266

1418

delay -= time2 - time

2267

1419

2268

try:

2269

session.send(client.secret)

2270

except gnutls.Error as error:

2271

logger.warning("gnutls send failed",

2272

exc_info = error)

2273

return

1420

sent_size = 0

1421

while sent_size < len(client.secret):

1422

try:

1423

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

1424

except gnutls.errors.GNUTLSError as error:

1425

logger.warning("gnutls send failed")

1426

return

1427

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

1428

sent, len(client.secret)

1429

- (sent_size + sent))

1430

sent_size += sent

2274

1431

2275

1432

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

2276

1433

# bump the timeout using extended_timeout

2277

client.bump_timeout(client.extended_timeout)

1434

client.checked_ok(client.extended_timeout)

2278

1435

if self.server.use_dbus:

2279

1436

# Emit D-Bus signal

2280

1437

client.GotSecret()

2284

1441

client.approvals_pending -= 1

2285

1442

try:

2286

1443

session.bye()

2287

except gnutls.Error as error:

2288

logger.warning("GnuTLS bye failed",

2289

exc_info=error)

1444

except gnutls.errors.GNUTLSError as error:

1445

logger.warning("GnuTLS bye failed")

2290

1446

2291

1447

@staticmethod

2292

1448

def peer_certificate(session):

2293

1449

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

2294

1450

# If not an OpenPGP certificate...

2295

if (gnutls.certificate_type_get(session._c_object)

2296

!= gnutls.CRT_OPENPGP):

2297

# ...return invalid data

2298

return b""

1451

if (gnutls.library.functions

1452

.gnutls_certificate_type_get(session._c_object)

1453

!= gnutls.library.constants.GNUTLS_CRT_OPENPGP):

1454

# ...do the normal thing

1455

return session.peer_certificate

2299

1456

list_size = ctypes.c_uint(1)

2300

cert_list = (gnutls.certificate_get_peers

1457

cert_list = (gnutls.library.functions

1458

.gnutls_certificate_get_peers

2301

1459

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

2302

1460

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

2303

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

1461

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

1462

" certificate")

2304

1463

if list_size.value == 0:

2305

1464

return None

2306

1465

cert = cert_list[0]

2310

1469

def fingerprint(openpgp):

2311

1470

"Convert an OpenPGP bytestring to a hexdigit fingerprint"

2312

1471

# New GnuTLS "datum" with the OpenPGP public key

2313

datum = gnutls.datum_t(

2314

ctypes.cast(ctypes.c_char_p(openpgp),

2315

ctypes.POINTER(ctypes.c_ubyte)),

2316

ctypes.c_uint(len(openpgp)))

1472

datum = (gnutls.library.types

1473

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

1474

ctypes.POINTER

1475

(ctypes.c_ubyte)),

1476

ctypes.c_uint(len(openpgp))))

2317

1477

# New empty GnuTLS certificate

2318

crt = gnutls.openpgp_crt_t()

2319

gnutls.openpgp_crt_init(ctypes.byref(crt))

1478

crt = gnutls.library.types.gnutls_openpgp_crt_t()

1479

(gnutls.library.functions

1480

.gnutls_openpgp_crt_init(ctypes.byref(crt)))

2320

1481

# Import the OpenPGP public key into the certificate

2321

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

2322

gnutls.OPENPGP_FMT_RAW)

1482

(gnutls.library.functions

1483

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

1484

gnutls.library.constants

1485

.GNUTLS_OPENPGP_FMT_RAW))

2323

1486

# Verify the self signature in the key

2324

1487

crtverify = ctypes.c_uint()

2325

gnutls.openpgp_crt_verify_self(crt, 0,

2326

ctypes.byref(crtverify))

1488

(gnutls.library.functions

1489

.gnutls_openpgp_crt_verify_self(crt, 0,

1490

ctypes.byref(crtverify)))

2327

1491

if crtverify.value != 0:

2328

gnutls.openpgp_crt_deinit(crt)

2329

raise gnutls.CertificateSecurityError("Verify failed")

1492

gnutls.library.functions.gnutls_openpgp_crt_deinit(crt)

1493

raise (gnutls.errors.CertificateSecurityError

1494

("Verify failed"))

2330

1495

# New buffer for the fingerprint

2331

1496

buf = ctypes.create_string_buffer(20)

2332

1497

buf_len = ctypes.c_size_t()

2333

1498

# Get the fingerprint from the certificate into the buffer

2334

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

2335

ctypes.byref(buf_len))

1499

(gnutls.library.functions

1500

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

1501

ctypes.byref(buf_len)))

2336

1502

# Deinit the certificate

2337

gnutls.openpgp_crt_deinit(crt)

1503

gnutls.library.functions.gnutls_openpgp_crt_deinit(crt)

2338

1504

# Convert the buffer to a Python bytestring

2339

1505

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

2340

1506

# Convert the bytestring to hexadecimal notation

2341

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

1507

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

2342

1508

return hex_fpr

2343

1509

2344

1510

2345

1511

class MultiprocessingMixIn(object):

2346

1512

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

2347

2348

1513

def sub_process_main(self, request, address):

2349

1514

try:

2350

1515

self.finish_request(request, address)

2351

except Exception:

1516

except:

2352

1517

self.handle_error(request, address)

2353

1518

self.close_request(request)

2354

1519

2355

1520

def process_request(self, request, address):

2356

1521

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

2357

1522

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

2358

args = (request, address))

1523

args = (request,

1524

address))

2359

1525

proc.start()

2360

1526

return proc

2361

1527

2362

1528

2363

1529

class MultiprocessingMixInWithPipe(MultiprocessingMixIn, object):

2364

1530

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

2365

2366

1531

def process_request(self, request, client_address):

2367

1532

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

2368

1533

2377

1542

2378

1543

def add_pipe(self, parent_pipe, proc):

2379

1544

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

2380

raise NotImplementedError()

1545

raise NotImplementedError

2381

1546

2382

1547

2383

1548

class IPv6_TCPServer(MultiprocessingMixInWithPipe,

2389

1554

interface: None or a network interface name (string)

2390

1555

use_ipv6: Boolean; to use IPv6 or not

2391

1556

"""

2392

2393

1557

def __init__(self, server_address, RequestHandlerClass,

2394

interface=None,

2395

use_ipv6=True,

2396

socketfd=None):

2397

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

2398

creating a new one with socket.socket().

2399

"""

1558

interface=None, use_ipv6=True):

2400

1559

self.interface = interface

2401

1560

if use_ipv6:

2402

1561

self.address_family = socket.AF_INET6

2403

if socketfd is not None:

2404

# Save the file descriptor

2405

self.socketfd = socketfd

2406

# Save the original socket.socket() function

2407

self.socket_socket = socket.socket

2408

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

2409

#

2410

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

2411

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

2412

# patching socket.socket.)

2413

#

2414

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

2415

@functools.wraps(socket.socket)

2416

def socket_wrapper(*args, **kwargs):

2417

# Restore original function so subsequent calls are

2418

# not affected.

2419

socket.socket = self.socket_socket

2420

del self.socket_socket

2421

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

2422

# saved file descriptor.

2423

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

2424

# Replace socket.socket() function with wrapper

2425

socket.socket = socket_wrapper

2426

# The socketserver.TCPServer.__init__ will call

2427

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

2428

# socket_wrapper(), if socketfd was set.

2429

1562

socketserver.TCPServer.__init__(self, server_address,

2430

1563

RequestHandlerClass)

2431

2432

1564

def server_bind(self):

2433

1565

"""This overrides the normal server_bind() function

2434

1566

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

2440

1572

self.interface)

2441

1573

else:

2442

1574

try:

2443

self.socket.setsockopt(

2444

socket.SOL_SOCKET, SO_BINDTODEVICE,

2445

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

1575

self.socket.setsockopt(socket.SOL_SOCKET,

1576

SO_BINDTODEVICE,

1577

str(self.interface

1578

+ '\0'))

2446

1579

except socket.error as error:

2447

if error.errno == errno.EPERM:

2448

logger.error("No permission to bind to"

2449

" interface %s", self.interface)

2450

elif error.errno == errno.ENOPROTOOPT:

1580

if error[0] == errno.EPERM:

1581

logger.error("No permission to"

1582

" bind to interface %s",

1583

self.interface)

1584

elif error[0] == errno.ENOPROTOOPT:

2451

1585

logger.error("SO_BINDTODEVICE not available;"

2452

1586

" cannot bind to interface %s",

2453

1587

self.interface)

2454

elif error.errno == errno.ENODEV:

2455

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

2456

" cannot bind", self.interface)

2457

1588

else:

2458

1589

raise

2459

1590

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

2462

1593

if self.address_family == socket.AF_INET6:

2463

1594

any_address = "::" # in6addr_any

2464

1595

else:

2465

any_address = "0.0.0.0" # INADDR_ANY

1596

any_address = socket.INADDR_ANY

2466

1597

self.server_address = (any_address,

2467

1598

self.server_address[1])

2468

1599

elif not self.server_address[1]:

2469

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

1600

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

1601

0)

2470

1602

# if self.interface:

2471

1603

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

2472

1604

# 0, # port

2484

1616

gnutls_priority GnuTLS priority string

2485

1617

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

2486

1618

2487

Assumes a GLib.MainLoop event loop.

1619

Assumes a gobject.MainLoop event loop.

2488

1620

"""

2489

2490

1621

def __init__(self, server_address, RequestHandlerClass,

2491

interface=None,

2492

use_ipv6=True,

2493

clients=None,

2494

gnutls_priority=None,

2495

use_dbus=True,

2496

socketfd=None):

1622

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

1623

gnutls_priority=None, use_dbus=True):

2497

1624

self.enabled = False

2498

1625

self.clients = clients

2499

1626

if self.clients is None:

2500

self.clients = {}

1627

self.clients = set()

2501

1628

self.use_dbus = use_dbus

2502

1629

self.gnutls_priority = gnutls_priority

2503

1630

IPv6_TCPServer.__init__(self, server_address,

2504

1631

RequestHandlerClass,

2505

1632

interface = interface,

2506

use_ipv6 = use_ipv6,

2507

socketfd = socketfd)

2508

1633

use_ipv6 = use_ipv6)

2509

1634

def server_activate(self):

2510

1635

if self.enabled:

2511

1636

return socketserver.TCPServer.server_activate(self)

2515

1640

2516

1641

def add_pipe(self, parent_pipe, proc):

2517

1642

# Call "handle_ipc" for both data and EOF events

2518

GLib.io_add_watch(

2519

parent_pipe.fileno(),

2520

GLib.IO_IN | GLib.IO_HUP,

2521

functools.partial(self.handle_ipc,

2522

parent_pipe = parent_pipe,

2523

proc = proc))

1643

gobject.io_add_watch(parent_pipe.fileno(),

1644

gobject.IO_IN | gobject.IO_HUP,

1645

functools.partial(self.handle_ipc,

1646

parent_pipe =

1647

parent_pipe,

1648

proc = proc))

2524

1649

2525

def handle_ipc(self, source, condition,

2526

parent_pipe=None,

2527

proc = None,

2528

client_object=None):

1650

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

1651

proc = None, client_object=None):

1652

condition_names = {

1653

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

1654

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

1655

# blocking).

1656

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

1657

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

1658

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

1659

# broken, usually for pipes and

1660

# sockets).

1661

}

1662

conditions_string = ' | '.join(name

1663

for cond, name in

1664

condition_names.iteritems()

1665

if cond & condition)

2529

1666

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

2530

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

1667

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

2531

1668

# Wait for other process to exit

2532

1669

proc.join()

2533

1670

return False

2540

1677

fpr = request[1]

2541

1678

address = request[2]

2542

1679

2543

for c in self.clients.values():

1680

for c in self.clients:

2544

1681

if c.fingerprint == fpr:

2545

1682

client = c

2546

1683

break

2554

1691

parent_pipe.send(False)

2555

1692

return False

2556

1693

2557

GLib.io_add_watch(

2558

parent_pipe.fileno(),

2559

GLib.IO_IN | GLib.IO_HUP,

2560

functools.partial(self.handle_ipc,

2561

parent_pipe = parent_pipe,

2562

proc = proc,

2563

client_object = client))

1694

gobject.io_add_watch(parent_pipe.fileno(),

1695

gobject.IO_IN | gobject.IO_HUP,

1696

functools.partial(self.handle_ipc,

1697

parent_pipe =

1698

parent_pipe,

1699

proc = proc,

1700

client_object =

1701

client))

2564

1702

parent_pipe.send(True)

2565

1703

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

2566

1704

# same fileno

2572

1710

2573

1711

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

2574

1712

funcname)(*args,

2575

**kwargs)))

1713

**kwargs)))

2576

1714

2577

1715

if command == 'getattr':

2578

1716

attrname = request[1]

2579

if isinstance(client_object.__getattribute__(attrname),

2580

collections.Callable):

2581

parent_pipe.send(('function', ))

1717

if callable(client_object.__getattribute__(attrname)):

1718

parent_pipe.send(('function',))

2582

1719

else:

2583

parent_pipe.send((

2584

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

1720

parent_pipe.send(('data', client_object

1721

.__getattribute__(attrname)))

2585

1722

2586

1723

if command == 'setattr':

2587

1724

attrname = request[1]

2591

1728

return True

2592

1729

2593

1730

2594

def rfc3339_duration_to_delta(duration):

2595

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

2596

2597

>>> rfc3339_duration_to_delta("P7D")

2598

datetime.timedelta(7)

2599

>>> rfc3339_duration_to_delta("PT60S")

2600

datetime.timedelta(0, 60)

2601

>>> rfc3339_duration_to_delta("PT60M")

2602

datetime.timedelta(0, 3600)

2603

>>> rfc3339_duration_to_delta("PT24H")

2604

datetime.timedelta(1)

2605

>>> rfc3339_duration_to_delta("P1W")

2606

datetime.timedelta(7)

2607

>>> rfc3339_duration_to_delta("PT5M30S")

2608

datetime.timedelta(0, 330)

2609

>>> rfc3339_duration_to_delta("P1DT3M20S")

2610

datetime.timedelta(1, 200)

2611

"""

2612

2613

# Parsing an RFC 3339 duration with regular expressions is not

2614

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

2615

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

2616

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

2617

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

2618

# avoid excessive use of external libraries.

2619

2620

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

2621

Token = collections.namedtuple("Token", (

2622

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

2623

# a "group" containing digits

2624

"value", # datetime.timedelta or None

2625

"followers")) # Tokens valid after this token

2626

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

2627

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

2628

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

2629

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

2630

datetime.timedelta(seconds=1),

2631

frozenset((token_end, )))

2632

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

2633

datetime.timedelta(minutes=1),

2634

frozenset((token_second, token_end)))

2635

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

2636

datetime.timedelta(hours=1),

2637

frozenset((token_minute, token_end)))

2638

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

2639

None,

2640

frozenset((token_hour, token_minute,

2641

token_second)))

2642

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

2643

datetime.timedelta(days=1),

2644

frozenset((token_time, token_end)))

2645

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

2646

datetime.timedelta(weeks=4),

2647

frozenset((token_day, token_end)))

2648

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

2649

datetime.timedelta(weeks=52),

2650

frozenset((token_month, token_end)))

2651

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

2652

datetime.timedelta(weeks=1),

2653

frozenset((token_end, )))

2654

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

2655

frozenset((token_year, token_month,

2656

token_day, token_time,

2657

token_week)))

2658

# Define starting values

2659

value = datetime.timedelta() # Value so far

2660

found_token = None

2661

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

2662

s = duration # String left to parse

2663

# Loop until end token is found

2664

while found_token is not token_end:

2665

# Search for any currently valid tokens

2666

for token in followers:

2667

match = token.regexp.match(s)

2668

if match is not None:

2669

# Token found

2670

if token.value is not None:

2671

# Value found, parse digits

2672

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

2673

# Add to value so far

2674

value += factor * token.value

2675

# Strip token from string

2676

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

2677

# Go to found token

2678

found_token = token

2679

# Set valid next tokens

2680

followers = found_token.followers

2681

break

2682

else:

2683

# No currently valid tokens were found

2684

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

2685

.format(duration))

2686

# End token found

2687

return value

2688

2689

2690

1731

def string_to_delta(interval):

2691

1732

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

2692

1733

2703

1744

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

2704

1745

datetime.timedelta(0, 330)

2705

1746

"""

2706

2707

try:

2708

return rfc3339_duration_to_delta(interval)

2709

except ValueError:

2710

pass

2711

2712

1747

timevalue = datetime.timedelta(0)

2713

1748

for s in interval.split():

2714

1749

try:

2715

suffix = s[-1]

1750

suffix = unicode(s[-1])

2716

1751

value = int(s[:-1])

2717

1752

if suffix == "d":

2718

1753

delta = datetime.timedelta(value)

2725

1760

elif suffix == "w":

2726

1761

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

2727

1762

else:

2728

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

2729

except IndexError as e:

1763

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

1764

except (ValueError, IndexError) as e:

2730

1765

raise ValueError(*(e.args))

2731

1766

timevalue += delta

2732

1767

return timevalue

2733

1768

2734

1769

1770

def if_nametoindex(interface):

1771

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

1772

1773

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

1774

global if_nametoindex

1775

try:

1776

if_nametoindex = (ctypes.cdll.LoadLibrary

1777

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

1778

.if_nametoindex)

1779

except (OSError, AttributeError):

1780

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

1781

def if_nametoindex(interface):

1782

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

1783

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

1784

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

1785

ifreq = fcntl.ioctl(s, SIOCGIFINDEX,

1786

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

1787

interface))

1788

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

1789

ifreq[16:20])[0]

1790

return interface_index

1791

return if_nametoindex(interface)

1792

1793

2735

1794

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

2736

1795

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

2737

1796

2745

1804

sys.exit()

2746

1805

if not noclose:

2747

1806

# Close all standard open file descriptors

2748

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

1807

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

2749

1808

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

2750

1809

raise OSError(errno.ENODEV,

2751

"{} not a character device"

2752

.format(os.devnull))

1810

"%s not a character device"

1811

% os.path.devnull)

2753

1812

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

2754

1813

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

2755

1814

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

2764

1823

2765

1824

parser = argparse.ArgumentParser()

2766

1825

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

2767

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

1826

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

2768

1827

help="show version number and exit")

2769

1828

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

2770

1829

help="Bind to interface IF")

2776

1835

help="Run self-test")

2777

1836

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

2778

1837

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

2779

" to terminal", default=None)

1838

" to terminal")

2780

1839

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

2781

1840

help="Debug level for stdout output")

2782

1841

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

2789

1848

" files")

2790

1849

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

2791

1850

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

2792

" system bus interface", default=None)

1851

" system bus interface")

2793

1852

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

2794

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

2795

default=None)

2796

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

2797

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

2798

" state", default=None)

2799

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

2800

help="Specify a file descriptor to a network"

2801

" socket to use instead of creating one")

2802

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

2803

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

2804

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

2805

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

2806

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

2807

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

2808

default=None)

2809

1853

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

2810

1854

options = parser.parse_args()

2811

1855

2812

1856

if options.check:

2813

1857

import doctest

2814

fail_count, test_count = doctest.testmod()

2815

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

1858

doctest.testmod()

1859

sys.exit()

2816

1860

2817

1861

# Default values for config file for server-global settings

2818

1862

server_defaults = { "interface": "",

2820

1864

"port": "",

2821

1865

"debug": "False",

2822

1866

"priority":

2823

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

2824

":+SIGN-DSA-SHA256",

1867

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

2825

1868

"servicename": "Mandos",

2826

1869

"use_dbus": "True",

2827

1870

"use_ipv6": "True",

2828

1871

"debuglevel": "",

2829

"restore": "True",

2830

"socket": "",

2831

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

2832

"foreground": "False",

2833

"zeroconf": "True",

2834

}

1872

}

2835

1873

2836

1874

# Parse config file for server-global settings

2837

1875

server_config = configparser.SafeConfigParser(server_defaults)

2838

1876

del server_defaults

2839

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

1877

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

1878

"mandos.conf"))

2840

1879

# Convert the SafeConfigParser object to a dict

2841

1880

server_settings = server_config.defaults()

2842

1881

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

2843

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

1882

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

2844

1883

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

2845

1884

option)

2846

1885

if server_settings["port"]:

2847

1886

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

2848

1887

"port")

2849

if server_settings["socket"]:

2850

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

2851

"socket")

2852

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

2853

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

2854

# happen with a supplied network socket.

2855

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

2856

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

2857

["socket"])

2858

1888

del server_config

2859

1889

2860

1890

# Override the settings from the config file with command line

2861

1891

# options, if set.

2862

1892

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

2863

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

2864

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

2865

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

1893

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

1894

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

2866

1895

value = getattr(options, option)

2867

1896

if value is not None:

2868

1897

server_settings[option] = value

2869

1898

del options

2870

1899

# Force all strings to be unicode

2871

1900

for option in server_settings.keys():

2872

if isinstance(server_settings[option], bytes):

2873

server_settings[option] = (server_settings[option]

2874

.decode("utf-8"))

2875

# Force all boolean options to be boolean

2876

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

2877

"foreground", "zeroconf"):

2878

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

2879

# Debug implies foreground

2880

if server_settings["debug"]:

2881

server_settings["foreground"] = True

1901

if type(server_settings[option]) is str:

1902

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

2882

1903

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

2883

1904

2884

1905

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

2885

1906

2886

if (not server_settings["zeroconf"]

2887

and not (server_settings["port"]

2888

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

2889

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

2890

2891

1907

# For convenience

2892

1908

debug = server_settings["debug"]

2893

1909

debuglevel = server_settings["debuglevel"]

2894

1910

use_dbus = server_settings["use_dbus"]

2895

1911

use_ipv6 = server_settings["use_ipv6"]

2896

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

2897

stored_state_file)

2898

foreground = server_settings["foreground"]

2899

zeroconf = server_settings["zeroconf"]

2900

2901

if debug:

2902

initlogger(debug, logging.DEBUG)

2903

else:

2904

if not debuglevel:

2905

initlogger(debug)

2906

else:

2907

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

2908

initlogger(debug, level)

2909

1912

2910

1913

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

2911

syslogger.setFormatter(

2912

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

2913

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

2914

server_settings["servicename"])))

1914

syslogger.setFormatter(logging.Formatter

1915

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

1916

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

1917

% server_settings["servicename"]))

2915

1918

2916

1919

# Parse config file with clients

2917

client_config = configparser.SafeConfigParser(Client

2918

.client_defaults)

1920

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

1921

"extended_timeout": "15m",

1922

"interval": "2m",

1923

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

1924

"host": "",

1925

"approval_delay": "0s",

1926

"approval_duration": "1s",

1927

}

1928

client_config = configparser.SafeConfigParser(client_defaults)

2919

1929

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

2920

1930

"clients.conf"))

2921

1931

2922

1932

global mandos_dbus_service

2923

1933

mandos_dbus_service = None

2924

1934

2925

socketfd = None

2926

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

2927

socketfd = server_settings["socket"]

2928

tcp_server = MandosServer(

2929

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

2930

ClientHandler,

2931

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

2932

use_ipv6=use_ipv6,

2933

gnutls_priority=server_settings["priority"],

2934

use_dbus=use_dbus,

2935

socketfd=socketfd)

2936

if not foreground:

2937

pidfilename = "/run/mandos.pid"

2938

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

2939

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

2940

pidfile = None

1935

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

1936

server_settings["port"]),

1937

ClientHandler,

1938

interface=(server_settings["interface"]

1939

or None),

1940

use_ipv6=use_ipv6,

1941

gnutls_priority=

1942

server_settings["priority"],

1943

use_dbus=use_dbus)

1944

if not debug:

1945

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

2941

1946

try:

2942

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

2943

except IOError as e:

2944

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

2945

exc_info=e)

1947

pidfile = open(pidfilename, "w")

1948

except IOError:

1949

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

2946

1950

2947

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

2948

("mandos", "mandos"),

2949

("nobody", "nogroup")):

1951

try:

1952

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

1953

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

1954

except KeyError:

2950

1955

try:

2951

uid = pwd.getpwnam(name).pw_uid

2952

gid = pwd.getpwnam(group).pw_gid

2953

break

1956

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

1957

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

2954

1958

except KeyError:

2955

continue

2956

else:

2957

uid = 65534

2958

gid = 65534

1959

try:

1960

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

1961

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

1962

except KeyError:

1963

uid = 65534

1964

gid = 65534

2959

1965

try:

2960

1966

os.setgid(gid)

2961

1967

os.setuid(uid)

2962

if debug:

2963

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

2964

gid))

2965

1968

except OSError as error:

2966

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

2967

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

2968

if error.errno != errno.EPERM:

2969

raise

1969

if error[0] != errno.EPERM:

1970

raise error

1971

1972

if not debug and not debuglevel:

1973

syslogger.setLevel(logging.WARNING)

1974

console.setLevel(logging.WARNING)

1975

if debuglevel:

1976

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

1977

syslogger.setLevel(level)

1978

console.setLevel(level)

2970

1979

2971

1980

if debug:

2972

1981

# Enable all possible GnuTLS debugging

2973

1982

2974

1983

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

2975

1984

# - GnuTLS manual

2976

gnutls.global_set_log_level(11)

1985

gnutls.library.functions.gnutls_global_set_log_level(11)

2977

1986

2978

@gnutls.log_func

1987

@gnutls.library.types.gnutls_log_func

2979

1988

def debug_gnutls(level, string):

2980

1989

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

2981

1990

2982

gnutls.global_set_log_function(debug_gnutls)

1991

(gnutls.library.functions

1992

.gnutls_global_set_log_function(debug_gnutls))

2983

1993

2984

1994

# Redirect stdin so all checkers get /dev/null

2985

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

1995

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

2986

1996

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

2987

1997

if null > 2:

2988

1998

os.close(null)

1999

else:

2000

# No console logging

2001

logger.removeHandler(console)

2989

2002

2990

2003

# Need to fork before connecting to D-Bus

2991

if not foreground:

2004

if not debug:

2992

2005

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

2993

2006

daemon()

2994

2007

2995

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

2996

# to inform GLib that threads will be used.

2997

GLib.threads_init()

2998

2999

2008

global main_loop

3000

2009

# From the Avahi example code

3001

DBusGMainLoop(set_as_default=True)

3002

main_loop = GLib.MainLoop()

2010

DBusGMainLoop(set_as_default=True )

2011

main_loop = gobject.MainLoop()

3003

2012

bus = dbus.SystemBus()

3004

2013

# End of Avahi example code

3005

2014

if use_dbus:

3006

2015

try:

3007

2016

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

3008

bus,

3009

do_not_queue=True)

3010

old_bus_name = dbus.service.BusName(

3011

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

3012

do_not_queue=True)

3013

except dbus.exceptions.DBusException as e:

3014

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

2017

bus, do_not_queue=True)

2018

old_bus_name = (dbus.service.BusName

2019

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

2020

do_not_queue=True))

2021

except dbus.exceptions.NameExistsException as e:

2022

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

3015

2023

use_dbus = False

3016

2024

server_settings["use_dbus"] = False

3017

2025

tcp_server.use_dbus = False

3018

if zeroconf:

3019

protocol = avahi.PROTO_INET6 if use_ipv6 else avahi.PROTO_INET

3020

service = AvahiServiceToSyslog(

3021

name = server_settings["servicename"],

3022

servicetype = "_mandos._tcp",

3023

protocol = protocol,

3024

bus = bus)

3025

if server_settings["interface"]:

3026

service.interface = if_nametoindex(

3027

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

2026

protocol = avahi.PROTO_INET6 if use_ipv6 else avahi.PROTO_INET

2027

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

2028

servicetype = "_mandos._tcp",

2029

protocol = protocol, bus = bus)

2030

if server_settings["interface"]:

2031

service.interface = (if_nametoindex

2032

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

3028

2033

3029

2034

global multiprocessing_manager

3030

2035

multiprocessing_manager = multiprocessing.Manager()

3031

2036

3032

2037

client_class = Client

3033

2038

if use_dbus:

3034

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

3035

3036

client_settings = Client.config_parser(client_config)

3037

old_client_settings = {}

3038

clients_data = {}

3039

3040

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

3041

global wnull

3042

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

3043

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

3044

# mode

3045

if debug or not foreground:

3046

wnull.close()

3047

3048

# Get client data and settings from last running state.

3049

if server_settings["restore"]:

3050

try:

3051

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

3052

if sys.version_info.major == 2:

3053

clients_data, old_client_settings = pickle.load(

3054

stored_state)

3055

else:

3056

bytes_clients_data, bytes_old_client_settings = (

3057

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

3058

### Fix bytes to strings

3059

## clients_data

3060

# .keys()

3061

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

3062

if isinstance(key, bytes)

3063

else key): value

3064

for key, value in

3065

bytes_clients_data.items() }

3066

del bytes_clients_data

3067

for key in clients_data:

3068

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

3069

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

3070

for k, v in

3071

clients_data[key].items() }

3072

clients_data[key] = value

3073

# .client_structure

3074

value["client_structure"] = [

3075

(s.decode("utf-8")

3076

if isinstance(s, bytes)

3077

else s) for s in

3078

value["client_structure"] ]

3079

# .name & .host

3080

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

3081

if isinstance(value[k], bytes):

3082

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

3083

## old_client_settings

3084

# .keys()

3085

old_client_settings = {

3086

(key.decode("utf-8")

3087

if isinstance(key, bytes)

3088

else key): value

3089

for key, value in

3090

bytes_old_client_settings.items() }

3091

del bytes_old_client_settings

3092

# .host

3093

for value in old_client_settings.values():

3094

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

3095

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

3096

.decode("utf-8"))

3097

os.remove(stored_state_path)

3098

except IOError as e:

3099

if e.errno == errno.ENOENT:

3100

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

3101

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

3102

else:

3103

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

3104

exc_info=e)

3105

raise

3106

except EOFError as e:

3107

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

3108

"EOFError:",

3109

exc_info=e)

3110

3111

with PGPEngine() as pgp:

3112

for client_name, client in clients_data.items():

3113

# Skip removed clients

3114

if client_name not in client_settings:

3115

continue

3116

3117

# Decide which value to use after restoring saved state.

3118

# We have three different values: Old config file,

3119

# new config file, and saved state.

3120

# New config value takes precedence if it differs from old

3121

# config value, otherwise use saved state.

3122

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

3123

try:

3124

# For each value in new config, check if it

3125

# differs from the old config value (Except for

3126

# the "secret" attribute)

3127

if (name != "secret"

3128

and (value !=

3129

old_client_settings[client_name][name])):

3130

client[name] = value

3131

except KeyError:

3132

pass

3133

3134

# Clients who has passed its expire date can still be

3135

# enabled if its last checker was successful. A Client

3136

# whose checker succeeded before we stored its state is

3137

# assumed to have successfully run all checkers during

3138

# downtime.

3139

if client["enabled"]:

3140

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

3141

if not client["last_checked_ok"]:

3142

logger.warning(

3143

"disabling client {} - Client never "

3144

"performed a successful checker".format(

3145

client_name))

3146

client["enabled"] = False

3147

elif client["last_checker_status"] != 0:

3148

logger.warning(

3149

"disabling client {} - Client last"

3150

" checker failed with error code"

3151

" {}".format(

3152

client_name,

3153

client["last_checker_status"]))

3154

client["enabled"] = False

3155

else:

3156

client["expires"] = (

3157

datetime.datetime.utcnow()

3158

+ client["timeout"])

3159

logger.debug("Last checker succeeded,"

3160

" keeping {} enabled".format(

3161

client_name))

2039

client_class = functools.partial(ClientDBusTransitional,

2040

bus = bus)

2041

def client_config_items(config, section):

2042

special_settings = {

2043

"approved_by_default":

2044

lambda: config.getboolean(section,

2045

"approved_by_default"),

2046

}

2047

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

3162

2048

try:

3163

client["secret"] = pgp.decrypt(

3164

client["encrypted_secret"],

3165

client_settings[client_name]["secret"])

3166

except PGPError:

3167

# If decryption fails, we use secret from new settings

3168

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

3169

client_name))

3170

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

3171

["secret"])

3172

3173

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

3174

for client_name in (set(old_client_settings)

3175

- set(client_settings)):

3176

del clients_data[client_name]

3177

for client_name in (set(client_settings)

3178

- set(old_client_settings)):

3179

clients_data[client_name] = client_settings[client_name]

3180

3181

# Create all client objects

3182

for client_name, client in clients_data.items():

3183

tcp_server.clients[client_name] = client_class(

3184

name = client_name,

3185

settings = client,

3186

server_settings = server_settings)

3187

2049

yield (name, special_settings[name]())

2050

except KeyError:

2051

yield (name, value)

2052

2053

tcp_server.clients.update(set(

2054

client_class(name = section,

2055

config= dict(client_config_items(

2056

client_config, section)))

2057

for section in client_config.sections()))

3188

2058

if not tcp_server.clients:

3189

2059

logger.warning("No clients defined")

3190

3191

if not foreground:

3192

if pidfile is not None:

3193

pid = os.getpid()

3194

try:

3195

with pidfile:

3196

print(pid, file=pidfile)

3197

except IOError:

3198

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

3199

pidfilename, pid)

3200

del pidfile

2060

2061

if not debug:

2062

try:

2063

with pidfile:

2064

pid = os.getpid()

2065

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

2066

del pidfile

2067

except IOError:

2068

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

2069

pidfilename, pid)

2070

except NameError:

2071

# "pidfile" was never created

2072

pass

3201

2073

del pidfilename

2074

2075

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

3202

2076

3203

2077

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

3204

2078

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

3205

2079

3206

2080

if use_dbus:

3207

3208

@alternate_dbus_interfaces(

3209

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

3210

class MandosDBusService(DBusObjectWithObjectManager):

2081

class MandosDBusService(dbus.service.Object):

3211

2082

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

3212

3213

2083

def __init__(self):

3214

2084

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

3215

3216

2085

_interface = "se.recompile.Mandos"

3217

2086

3218

2087

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

3225

2094

"D-Bus signal"

3226

2095

pass

3227

2096

3228

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

3229

"true"})

3230

2097

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

3231

2098

def ClientRemoved(self, objpath, name):

3232

2099

"D-Bus signal"

3233

2100

pass

3234

2101

3235

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

3236

"true"})

3237

2102

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

3238

2103

def GetAllClients(self):

3239

2104

"D-Bus method"

3240

return dbus.Array(c.dbus_object_path for c in

3241

tcp_server.clients.values())

2105

return dbus.Array(c.dbus_object_path

2106

for c in tcp_server.clients)

3242

2107

3243

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

3244

"true"})

3245

2108

@dbus.service.method(_interface,

3246

2109

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

3247

2110

def GetAllClientsWithProperties(self):

3248

2111

"D-Bus method"

3249

2112

return dbus.Dictionary(

3250

{ c.dbus_object_path: c.GetAll(

3251

"se.recompile.Mandos.Client")

3252

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

2113

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

2114

for c in tcp_server.clients),

3253

2115

signature="oa{sv}")

3254

2116

3255

2117

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

3256

2118

def RemoveClient(self, object_path):

3257

2119

"D-Bus method"

3258

for c in tcp_server.clients.values():

2120

for c in tcp_server.clients:

3259

2121

if c.dbus_object_path == object_path:

3260

del tcp_server.clients[c.name]

2122

tcp_server.clients.remove(c)

3261

2123

c.remove_from_connection()

3262

# Don't signal the disabling

2124

# Don't signal anything except ClientRemoved

3263

2125

c.disable(quiet=True)

3264

# Emit D-Bus signal for removal

3265

self.client_removed_signal(c)

2126

# Emit D-Bus signal

2127

self.ClientRemoved(object_path, c.name)

3266

2128

return

3267

2129

raise KeyError(object_path)

3268

2130

3269

2131

del _interface

3270

3271

@dbus.service.method(dbus.OBJECT_MANAGER_IFACE,

3272

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

3273

def GetManagedObjects(self):

3274

"""D-Bus method"""

3275

return dbus.Dictionary(

3276

{ client.dbus_object_path:

3277

dbus.Dictionary(

3278

{ interface: client.GetAll(interface)

3279

for interface in

3280

client._get_all_interface_names()})

3281

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

3282

3283

def client_added_signal(self, client):

3284

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

3285

if use_dbus:

3286

# New standard signal

3287

self.InterfacesAdded(

3288

client.dbus_object_path,

3289

dbus.Dictionary(

3290

{ interface: client.GetAll(interface)

3291

for interface in

3292

client._get_all_interface_names()}))

3293

# Old signal

3294

self.ClientAdded(client.dbus_object_path)

3295

3296

def client_removed_signal(self, client):

3297

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

3298

if use_dbus:

3299

# New standard signal

3300

self.InterfacesRemoved(

3301

client.dbus_object_path,

3302

client._get_all_interface_names())

3303

# Old signal

3304

self.ClientRemoved(client.dbus_object_path,

3305

client.name)

3306

2132

3307

mandos_dbus_service = MandosDBusService()

2133

class MandosDBusServiceTransitional(MandosDBusService):

2134

__metaclass__ = AlternateDBusNamesMetaclass

2135

mandos_dbus_service = MandosDBusServiceTransitional()

3308

2136

3309

2137

def cleanup():

3310

2138

"Cleanup function; run on exit"

3311

if zeroconf:

3312

service.cleanup()

2139

service.cleanup()

3313

2140

3314

2141

multiprocessing.active_children()

3315

wnull.close()

3316

if not (tcp_server.clients or client_settings):

3317

return

3318

3319

# Store client before exiting. Secrets are encrypted with key

3320

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

3321

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

3322

clients = {}

3323

with PGPEngine() as pgp:

3324

for client in tcp_server.clients.values():

3325

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

3326

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

3327

key)

3328

client_dict = {}

3329

3330

# A list of attributes that can not be pickled

3331

# + secret.

3332

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

3333

"checker", "server_settings" }

3334

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

3335

.Object):

3336

exclude.add(name)

3337

3338

client_dict["encrypted_secret"] = (client

3339

.encrypted_secret)

3340

for attr in client.client_structure:

3341

if attr not in exclude:

3342

client_dict[attr] = getattr(client, attr)

3343

3344

clients[client.name] = client_dict

3345

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

3346

3347

try:

3348

with tempfile.NamedTemporaryFile(

3349

mode='wb',

3350

suffix=".pickle",

3351

prefix='clients-',

3352

dir=os.path.dirname(stored_state_path),

3353

delete=False) as stored_state:

3354

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

3355

protocol = 2)

3356

tempname = stored_state.name

3357

os.rename(tempname, stored_state_path)

3358

except (IOError, OSError) as e:

3359

if not debug:

3360

try:

3361

os.remove(tempname)

3362

except NameError:

3363

pass

3364

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

3365

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

3366

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

3367

else:

3368

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

3369

exc_info=e)

3370

raise

3371

3372

# Delete all clients, and settings from config

3373

2142

while tcp_server.clients:

3374

name, client = tcp_server.clients.popitem()

2143

client = tcp_server.clients.pop()

3375

2144

if use_dbus:

3376

2145

client.remove_from_connection()

3377

# Don't signal the disabling

2146

client.disable_hook = None

2147

# Don't signal anything except ClientRemoved

3378

2148

client.disable(quiet=True)

3379

# Emit D-Bus signal for removal

3380

2149

if use_dbus:

3381

mandos_dbus_service.client_removed_signal(client)

3382

client_settings.clear()

2150

# Emit D-Bus signal

2151

mandos_dbus_service.ClientRemoved(client

2152

.dbus_object_path,

2153

client.name)

3383

2154

3384

2155

atexit.register(cleanup)

3385

2156

3386

for client in tcp_server.clients.values():

2157

for client in tcp_server.clients:

3387

2158

if use_dbus:

3388

# Emit D-Bus signal for adding

3389

mandos_dbus_service.client_added_signal(client)

3390

# Need to initiate checking of clients

3391

if client.enabled:

3392

client.init_checker()

2159

# Emit D-Bus signal

2160

mandos_dbus_service.ClientAdded(client.dbus_object_path)

2161

client.enable()

3393

2162

3394

2163

tcp_server.enable()

3395

2164

tcp_server.server_activate()

3396

2165

3397

2166

# Find out what port we got

3398

if zeroconf:

3399

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

2167

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

3400

2168

if use_ipv6:

3401

2169

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

3402

" flowinfo %d, scope_id %d",

3403

*tcp_server.socket.getsockname())

2170

" flowinfo %d, scope_id %d"

2171

% tcp_server.socket.getsockname())

3404

2172

else: # IPv4

3405

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

3406

*tcp_server.socket.getsockname())

2173

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

2174

% tcp_server.socket.getsockname())

3407

2175

3408

2176

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

3409

2177

3410

2178

try:

3411

if zeroconf:

3412

# From the Avahi example code

3413

try:

3414

service.activate()

3415

except dbus.exceptions.DBusException as error:

3416

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

3417

cleanup()

3418

sys.exit(1)

3419

# End of Avahi example code

2179

# From the Avahi example code

2180

try:

2181

service.activate()

2182

except dbus.exceptions.DBusException as error:

2183

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

2184

cleanup()

2185

sys.exit(1)

2186

# End of Avahi example code

3420

2187

3421

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

3422

lambda *args, **kwargs:

3423

(tcp_server.handle_request

3424

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

2188

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

2189

lambda *args, **kwargs:

2190

(tcp_server.handle_request

2191

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

3425

2192

3426

2193

logger.debug("Starting main loop")

3427

2194

main_loop.run()

3428

2195

except AvahiError as error:

3429

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

2196

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

3430

2197

cleanup()

3431

2198

sys.exit(1)

3432

2199

except KeyboardInterrupt: