/mandos/trunk : revision 518.2.3

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

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#

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# Everything else is

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#

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

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

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# along with this program. If not, see

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

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#

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

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

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#

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from __future__ import division, with_statement, absolute_import

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from __future__ import (division, absolute_import, print_function,

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unicode_literals)

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import SocketServer as socketserver

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import socket

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import optparse

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import argparse

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import datetime

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import errno

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import gnutls.crypto

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import logging

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import logging.handlers

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import pwd

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from contextlib import closing

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import contextlib

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import struct

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import fcntl

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import functools

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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 dbus

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import dbus.service

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import ctypes.util

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import xml.dom.minidom

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import inspect

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import GnuPGInterface

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try:

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SO_BINDTODEVICE = socket.SO_BINDTODEVICE

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SO_BINDTODEVICE = None

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version = "1.0.14"

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version = "1.4.1"

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stored_state_file = "clients.pickle"

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logger = logging.Logger(u'mandos')

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logger = logging.getLogger()

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

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u' %(message)s'))

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logger.addHandler(syslogger)

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console = logging.StreamHandler()

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

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u' %(levelname)s:'

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u' %(message)s'))

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logger.addHandler(console)

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address = str("/dev/log")))

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try:

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if_nametoindex = (ctypes.cdll.LoadLibrary

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

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.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(str("16s16x"),

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interface))

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

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ifreq[16:20])[0]

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return interface_index

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def initlogger(level=logging.WARNING):

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"""init logger and add loglevel"""

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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('%(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 CryptoError(Exception):

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pass

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class Crypto(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.gnupg = GnuPGInterface.GnuPG()

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

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self.gnupg = GnuPGInterface.GnuPG()

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self.gnupg.options.meta_interactive = False

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self.gnupg.options.homedir = self.tempdir

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self.gnupg.options.extra_args.extend(['--force-mdc',

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'--quiet'])

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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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return b"mandos" + binascii.hexlify(password)

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def encrypt(self, data, password):

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self.gnupg.passphrase = self.password_encode(password)

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with open(os.devnull) as devnull:

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try:

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proc = self.gnupg.run(['--symmetric'],

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create_fhs=['stdin', 'stdout'],

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attach_fhs={'stderr': devnull})

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with contextlib.closing(proc.handles['stdin']) as f:

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f.write(data)

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with contextlib.closing(proc.handles['stdout']) as f:

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ciphertext = f.read()

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proc.wait()

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except IOError as e:

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raise CryptoError(e)

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self.gnupg.passphrase = None

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return ciphertext

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def decrypt(self, data, password):

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self.gnupg.passphrase = self.password_encode(password)

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with open(os.devnull) as devnull:

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try:

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proc = self.gnupg.run(['--decrypt'],

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create_fhs=['stdin', 'stdout'],

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attach_fhs={'stderr': devnull})

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with contextlib.closing(proc.handles['stdin'] ) as f:

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f.write(data)

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with contextlib.closing(proc.handles['stdout']) as f:

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decrypted_plaintext = f.read()

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proc.wait()

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except IOError as e:

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raise CryptoError(e)

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self.gnupg.passphrase = None

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return decrypted_plaintext

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class AvahiError(Exception):

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

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Attributes:

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

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Used to optionally bind to the specified interface.

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

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

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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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"""

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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 = u"", host = u"", max_renames = 32768,

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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.group = None # our entry group

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self.server = None

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self.bus = bus

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self.entry_group_state_changed_match = None

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def rename(self):

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

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if self.rename_count >= self.max_renames:

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

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u" after %i retries, exiting.",

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

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" after %i retries, exiting.",

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self.rename_count)

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raise AvahiServiceError(u"Too many renames")

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

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

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unicode(self.name))

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syslogger.setFormatter(logging.Formatter

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

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

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% self.name))

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raise AvahiServiceError("Too many renames")

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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)

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self.remove()

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self.add()

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try:

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self.add()

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except dbus.exceptions.DBusException as error:

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

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self.cleanup()

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os._exit(1)

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self.rename_count += 1

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def remove(self):

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

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if self.entry_group_state_changed_match is not None:

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self.entry_group_state_changed_match.remove()

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self.entry_group_state_changed_match = None

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if self.group is not None:

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self.group.Reset()

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def add(self):

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

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self.remove()

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if self.group is None:

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self.group = dbus.Interface(

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self.bus.get_object(avahi.DBUS_NAME,

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self.server.EntryGroupNew()),

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avahi.DBUS_INTERFACE_ENTRY_GROUP)

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self.group.connect_to_signal('StateChanged',

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self

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.entry_group_state_changed)

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

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self.entry_group_state_changed_match = (

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self.group.connect_to_signal(

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'StateChanged', self.entry_group_state_changed))

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

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self.name, self.type)

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self.group.AddService(

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self.interface,

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self.group.Commit()

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def entry_group_state_changed(self, state, error):

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

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

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

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if state == avahi.ENTRY_GROUP_ESTABLISHED:

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logger.debug(u"Zeroconf service established.")

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logger.debug("Zeroconf service established.")

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elif state == avahi.ENTRY_GROUP_COLLISION:

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logger.warning(u"Zeroconf service name collision.")

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

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self.rename()

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elif state == avahi.ENTRY_GROUP_FAILURE:

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

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

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unicode(error))

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raise AvahiGroupError(u"State changed: %s"

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raise AvahiGroupError("State changed: %s"

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% unicode(error))

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def cleanup(self):

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

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if self.group is not None:

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self.group.Free()

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try:

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self.group.Free()

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except (dbus.exceptions.UnknownMethodException,

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dbus.exceptions.DBusException):

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pass

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self.group = None

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def server_state_changed(self, state):

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self.remove()

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

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

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if state == avahi.SERVER_COLLISION:

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logger.error(u"Zeroconf server name collision")

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self.remove()

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

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bad_states = { avahi.SERVER_INVALID:

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"Zeroconf server invalid",

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avahi.SERVER_REGISTERING: None,

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avahi.SERVER_COLLISION:

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"Zeroconf server name collision",

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avahi.SERVER_FAILURE:

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"Zeroconf server failure" }

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if state in bad_states:

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if bad_states[state] is not None:

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if error is None:

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logger.error(bad_states[state])

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else:

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

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self.cleanup()

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elif state == avahi.SERVER_RUNNING:

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self.add()

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else:

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if error is None:

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

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else:

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

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def activate(self):

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

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if self.server is None:

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self.server = dbus.Interface(

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self.bus.get_object(avahi.DBUS_NAME,

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avahi.DBUS_PATH_SERVER),

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avahi.DBUS_PATH_SERVER,

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follow_name_owner_changes=True),

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avahi.DBUS_INTERFACE_SERVER)

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self.server.connect_to_signal(u"StateChanged",

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self.server.connect_to_signal("StateChanged",

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self.server_state_changed)

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

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class AvahiServiceToSyslog(AvahiService):

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def rename(self):

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

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ret = AvahiService.rename(self)

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syslogger.setFormatter(logging.Formatter

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

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

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% self.name))

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return ret

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def _timedelta_to_milliseconds(td):

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"Convert a datetime.timedelta() to milliseconds"

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

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+ (td.seconds * 1000)

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+ (td.microseconds // 1000))

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class Client(object):

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

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Attributes:

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D-Bus identifiers

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

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uniquely identify the client

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

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host: string; available for use by the checker command

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

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last_enabled: datetime.datetime(); (UTC)

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enabled: bool()

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

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

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until this client is invalid

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

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

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

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

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

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

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to see if the client lives.

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'None' if no process is running.

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checker_initiator_tag: a gobject event source tag, or None

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disable_initiator_tag: - '' -

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checker_callback_tag: - '' -

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checker_command: string; External command which is run to check if

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client lives. %() expansions are done at

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checker_callback_tag: a gobject event source tag, or None

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checker_command: string; External command which is run to check

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if client lives. %() expansions are done at

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

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

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checker_initiator_tag: a gobject event source tag, or None

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

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client_structure: Object describing what attributes a client has

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and is used for storing the client at exit

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current_checker_command: string; current running checker_command

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disable_initiator_tag: a gobject event source tag, or None

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enabled: bool()

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

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uniquely identify the client

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host: string; available for use by the checker command

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

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

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

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last_checker_status: integer between 0 and 255 reflecting exit

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status of last checker. -1 reflects crashed

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checker, or None.

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

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D-Bus identifiers

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

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

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until this client is disabled

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extended_timeout: extra long timeout when password has been sent

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runtime_expansions: Allowed attributes for runtime expansion.

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

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disabled, or None

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"""

260

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@staticmethod

262

def _timedelta_to_milliseconds(td):

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"Convert a datetime.timedelta() to milliseconds"

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

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+ (td.seconds * 1000)

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+ (td.microseconds // 1000))

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runtime_expansions = ("approval_delay", "approval_duration",

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

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

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

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434

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def timeout_milliseconds(self):

269

436

"Return the 'timeout' attribute in milliseconds"

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return self._timedelta_to_milliseconds(self.timeout)

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return _timedelta_to_milliseconds(self.timeout)

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def extended_timeout_milliseconds(self):

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"Return the 'extended_timeout' attribute in milliseconds"

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return _timedelta_to_milliseconds(self.extended_timeout)

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442

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def interval_milliseconds(self):

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"Return the 'interval' attribute in milliseconds"

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return self._timedelta_to_milliseconds(self.interval)

275

276

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

445

return _timedelta_to_milliseconds(self.interval)

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447

def approval_delay_milliseconds(self):

448

return _timedelta_to_milliseconds(self.approval_delay)

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450

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

277

451

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

278

452

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

279

453

attribute."""

280

454

self.name = name

281

455

if config is None:

282

456

config = {}

283

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

457

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

284

458

# Uppercase and remove spaces from fingerprint for later

285

459

# comparison purposes with return value from the fingerprint()

286

460

# function

287

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

288

.replace(u" ", u""))

289

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

290

if u"secret" in config:

291

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

292

elif u"secfile" in config:

293

with closing(open(os.path.expanduser

294

(os.path.expandvars

295

(config[u"secfile"])),

296

"rb")) as secfile:

461

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

462

.replace(" ", ""))

463

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

464

if "secret" in config:

465

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

466

elif "secfile" in config:

467

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

468

(config["secfile"])),

469

"rb") as secfile:

297

470

self.secret = secfile.read()

298

471

else:

299

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

472

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

300

473

% self.name)

301

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

474

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

302

475

self.created = datetime.datetime.utcnow()

303

self.enabled = False

304

self.last_enabled = None

476

self.enabled = config.get("enabled", True)

477

self.last_approval_request = None

478

if self.enabled:

479

self.last_enabled = datetime.datetime.utcnow()

480

else:

481

self.last_enabled = None

305

482

self.last_checked_ok = None

306

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

307

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

308

self.disable_hook = disable_hook

483

self.last_checker_status = None

484

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

485

self.extended_timeout = string_to_delta(config

486

["extended_timeout"])

487

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

309

488

self.checker = None

310

489

self.checker_initiator_tag = None

311

490

self.disable_initiator_tag = None

491

if self.enabled:

492

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

493

else:

494

self.expires = None

312

495

self.checker_callback_tag = None

313

self.checker_command = config[u"checker"]

496

self.checker_command = config["checker"]

314

497

self.current_checker_command = None

315

self.last_connect = None

498

self._approved = None

499

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

500

True)

501

self.approvals_pending = 0

502

self.approval_delay = string_to_delta(

503

config["approval_delay"])

504

self.approval_duration = string_to_delta(

505

config["approval_duration"])

506

self.changedstate = (multiprocessing_manager

507

.Condition(multiprocessing_manager

508

.Lock()))

509

self.client_structure = [attr for attr in

510

self.__dict__.iterkeys()

511

if not attr.startswith("_")]

512

self.client_structure.append("client_structure")

513

514

for name, t in inspect.getmembers(type(self),

515

lambda obj:

516

isinstance(obj,

517

property)):

518

if not name.startswith("_"):

519

self.client_structure.append(name)

520

521

# Send notice to process children that client state has changed

522

def send_changedstate(self):

523

with self.changedstate:

524

self.changedstate.notify_all()

316

525

317

526

def enable(self):

318

527

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

319

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

528

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

320

529

# Already enabled

321

530

return

531

self.send_changedstate()

532

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

533

self.enabled = True

322

534

self.last_enabled = datetime.datetime.utcnow()

535

self.init_checker()

536

537

def disable(self, quiet=True):

538

"""Disable this client."""

539

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

540

return False

541

if not quiet:

542

self.send_changedstate()

543

if not quiet:

544

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

545

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

546

gobject.source_remove(self.disable_initiator_tag)

547

self.disable_initiator_tag = None

548

self.expires = None

549

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

550

gobject.source_remove(self.checker_initiator_tag)

551

self.checker_initiator_tag = None

552

self.stop_checker()

553

self.enabled = False

554

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

555

return False

556

557

def __del__(self):

558

self.disable()

559

560

def init_checker(self):

323

561

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

324

562

# and every interval from then on.

325

563

self.checker_initiator_tag = (gobject.timeout_add

329

567

self.disable_initiator_tag = (gobject.timeout_add

330

568

(self.timeout_milliseconds(),

331

569

self.disable))

332

self.enabled = True

333

570

# Also start a new checker *right now*.

334

571

self.start_checker()

335

572

336

def disable(self, quiet=True):

337

"""Disable this client."""

338

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

339

return False

340

if not quiet:

341

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

342

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

343

gobject.source_remove(self.disable_initiator_tag)

344

self.disable_initiator_tag = None

345

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

346

gobject.source_remove(self.checker_initiator_tag)

347

self.checker_initiator_tag = None

348

self.stop_checker()

349

if self.disable_hook:

350

self.disable_hook(self)

351

self.enabled = False

352

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

353

return False

354

355

def __del__(self):

356

self.disable_hook = None

357

self.disable()

358

359

573

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

360

574

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

361

575

self.checker_callback_tag = None

362

576

self.checker = None

363

577

if os.WIFEXITED(condition):

364

exitstatus = os.WEXITSTATUS(condition)

365

if exitstatus == 0:

366

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

578

self.last_checker_status = os.WEXITSTATUS(condition)

579

if self.last_checker_status == 0:

580

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

367

581

vars(self))

368

582

self.checked_ok()

369

583

else:

370

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

584

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

371

585

vars(self))

372

586

else:

373

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

587

self.last_checker_status = -1

588

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

374

589

vars(self))

375

590

376

def checked_ok(self):

591

def checked_ok(self, timeout=None):

377

592

"""Bump up the timeout for this client.

378

593

379

594

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

380

595

alive and well.

381

596

"""

597

if timeout is None:

598

timeout = self.timeout

382

599

self.last_checked_ok = datetime.datetime.utcnow()

383

gobject.source_remove(self.disable_initiator_tag)

384

self.disable_initiator_tag = (gobject.timeout_add

385

(self.timeout_milliseconds(),

386

self.disable))

600

if self.disable_initiator_tag is not None:

601

gobject.source_remove(self.disable_initiator_tag)

602

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

603

self.disable_initiator_tag = (gobject.timeout_add

604

(_timedelta_to_milliseconds

605

(timeout), self.disable))

606

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

607

608

def need_approval(self):

609

self.last_approval_request = datetime.datetime.utcnow()

387

610

388

611

def start_checker(self):

389

612

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

396

619

# client would inevitably timeout, since no checker would get

397

620

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

398

621

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

399

# than 'timeout' for the client to be declared invalid, which

400

# is as it should be.

622

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

623

# should be.

401

624

402

625

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

403

626

try:

404

627

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

405

except (AttributeError, OSError), error:

628

except (AttributeError, OSError) as error:

406

629

if (isinstance(error, OSError)

407

630

and error.errno != errno.ECHILD):

408

631

raise error

409

632

else:

410

633

if pid:

411

logger.warning(u"Checker was a zombie")

634

logger.warning("Checker was a zombie")

412

635

gobject.source_remove(self.checker_callback_tag)

413

636

self.checker_callback(pid, status,

414

637

self.current_checker_command)

419

642

command = self.checker_command % self.host

420

643

except TypeError:

421

644

# Escape attributes for the shell

422

escaped_attrs = dict((key,

423

re.escape(unicode(str(val),

424

errors=

425

u'replace')))

426

for key, val in

427

vars(self).iteritems())

645

escaped_attrs = dict(

646

(attr,

647

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

648

errors=

649

'replace')))

650

for attr in

651

self.runtime_expansions)

652

428

653

try:

429

654

command = self.checker_command % escaped_attrs

430

except TypeError, error:

431

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

432

u' %s', self.checker_command, error)

655

except TypeError as error:

656

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

657

' %s', self.checker_command, error)

433

658

return True # Try again later

434

659

self.current_checker_command = command

435

660

try:

436

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

661

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

437

662

command, self.name)

438

663

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

439

664

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

441

666

# always replaced by /dev/null.)

442

667

self.checker = subprocess.Popen(command,

443

668

close_fds=True,

444

shell=True, cwd=u"/")

669

shell=True, cwd="/")

445

670

self.checker_callback_tag = (gobject.child_watch_add

446

671

(self.checker.pid,

447

672

self.checker_callback,

452

677

if pid:

453

678

gobject.source_remove(self.checker_callback_tag)

454

679

self.checker_callback(pid, status, command)

455

except OSError, error:

456

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

680

except OSError as error:

681

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

457

682

error)

458

683

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

459

684

return True

463

688

if self.checker_callback_tag:

464

689

gobject.source_remove(self.checker_callback_tag)

465

690

self.checker_callback_tag = None

466

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

691

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

467

692

return

468

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

693

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

469

694

try:

470

695

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

471

696

#time.sleep(0.5)

472

697

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

473

698

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

474

except OSError, error:

699

except OSError as error:

475

700

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

476

701

raise

477

702

self.checker = None

478

479

def still_valid(self):

480

"""Has the timeout not yet passed for this client?"""

481

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

482

return False

483

now = datetime.datetime.utcnow()

484

if self.last_checked_ok is None:

485

return now < (self.created + self.timeout)

486

else:

487

return now < (self.last_checked_ok + self.timeout)

488

489

490

def dbus_service_property(dbus_interface, signature=u"v",

491

access=u"readwrite", byte_arrays=False):

703

704

705

def dbus_service_property(dbus_interface, signature="v",

706

access="readwrite", byte_arrays=False):

492

707

"""Decorators for marking methods of a DBusObjectWithProperties to

493

708

become properties on the D-Bus.

494

709

499

714

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

500

715

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

501

716

"""

717

# Encoding deeply encoded byte arrays is not supported yet by the

718

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

719

if byte_arrays and signature != "ay":

720

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

721

" signature %r" % signature)

502

722

def decorator(func):

503

723

func._dbus_is_property = True

504

724

func._dbus_interface = dbus_interface

505

725

func._dbus_signature = signature

506

726

func._dbus_access = access

507

727

func._dbus_name = func.__name__

508

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

728

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

509

729

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

510

func._dbus_get_args_options = {u'byte_arrays': byte_arrays }

730

func._dbus_get_args_options = {'byte_arrays': byte_arrays }

511

731

return func

512

732

return decorator

513

733

533

753

534

754

class DBusObjectWithProperties(dbus.service.Object):

535

755

"""A D-Bus object with properties.

536

756

537

757

Classes inheriting from this can use the dbus_service_property

538

758

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

539

759

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

541

761

542

762

@staticmethod

543

763

def _is_dbus_property(obj):

544

return getattr(obj, u"_dbus_is_property", False)

764

return getattr(obj, "_dbus_is_property", False)

545

765

546

766

def _get_all_dbus_properties(self):

547

767

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

548

768

"""

549

return ((prop._dbus_name, prop)

769

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

770

for cls in self.__class__.__mro__

550

771

for name, prop in

551

inspect.getmembers(self, self._is_dbus_property))

772

inspect.getmembers(cls, self._is_dbus_property))

552

773

553

774

def _get_dbus_property(self, interface_name, property_name):

554

775

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

555

776

property with the specified name and interface.

556

777

"""

557

for name in (property_name,

558

property_name + u"_dbus_property"):

559

prop = getattr(self, name, None)

560

if (prop is None

561

or not self._is_dbus_property(prop)

562

or prop._dbus_name != property_name

563

or (interface_name and prop._dbus_interface

564

and interface_name != prop._dbus_interface)):

565

continue

566

return prop

778

for cls in self.__class__.__mro__:

779

for name, value in (inspect.getmembers

780

(cls, self._is_dbus_property)):

781

if (value._dbus_name == property_name

782

and value._dbus_interface == interface_name):

783

return value.__get__(self)

784

567

785

# No such property

568

raise DBusPropertyNotFound(self.dbus_object_path + u":"

569

+ interface_name + u"."

786

raise DBusPropertyNotFound(self.dbus_object_path + ":"

787

+ interface_name + "."

570

788

+ property_name)

571

789

572

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

573

out_signature=u"v")

790

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

791

out_signature="v")

574

792

def Get(self, interface_name, property_name):

575

793

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

576

794

"""

577

795

prop = self._get_dbus_property(interface_name, property_name)

578

if prop._dbus_access == u"write":

796

if prop._dbus_access == "write":

579

797

raise DBusPropertyAccessException(property_name)

580

798

value = prop()

581

if not hasattr(value, u"variant_level"):

799

if not hasattr(value, "variant_level"):

582

800

return value

583

801

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

584

802

585

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

803

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

586

804

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

587

805

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

588

806

"""

589

807

prop = self._get_dbus_property(interface_name, property_name)

590

if prop._dbus_access == u"read":

808

if prop._dbus_access == "read":

591

809

raise DBusPropertyAccessException(property_name)

592

if prop._dbus_get_args_options[u"byte_arrays"]:

810

if prop._dbus_get_args_options["byte_arrays"]:

811

# The byte_arrays option is not supported yet on

812

# signatures other than "ay".

813

if prop._dbus_signature != "ay":

814

raise ValueError

593

815

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

594

816

for byte in value))

595

817

prop(value)

596

818

597

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

598

out_signature=u"a{sv}")

819

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

820

out_signature="a{sv}")

599

821

def GetAll(self, interface_name):

600

822

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

601

823

standard.

602

824

603

825

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

604

826

"""

605

all = {}

827

properties = {}

606

828

for name, prop in self._get_all_dbus_properties():

607

829

if (interface_name

608

830

and interface_name != prop._dbus_interface):

609

831

# Interface non-empty but did not match

610

832

continue

611

833

# Ignore write-only properties

612

if prop._dbus_access == u"write":

834

if prop._dbus_access == "write":

613

835

continue

614

836

value = prop()

615

if not hasattr(value, u"variant_level"):

616

all[name] = value

837

if not hasattr(value, "variant_level"):

838

properties[name] = value

617

839

continue

618

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

619

value.variant_level+1)

620

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

840

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

841

value.variant_level+1)

842

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

621

843

622

844

@dbus.service.method(dbus.INTROSPECTABLE_IFACE,

623

out_signature=u"s",

845

out_signature="s",

624

846

path_keyword='object_path',

625

847

connection_keyword='connection')

626

848

def Introspect(self, object_path, connection):

631

853

try:

632

854

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

633

855

def make_tag(document, name, prop):

634

e = document.createElement(u"property")

635

e.setAttribute(u"name", name)

636

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

637

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

856

e = document.createElement("property")

857

e.setAttribute("name", name)

858

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

859

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

638

860

return e

639

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

861

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

640

862

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

641

863

for name, prop

642

864

in self._get_all_dbus_properties()

643

865

if prop._dbus_interface

644

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

866

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

645

867

if_tag.appendChild(tag)

646

868

# Add the names to the return values for the

647

869

# "org.freedesktop.DBus.Properties" methods

648

if (if_tag.getAttribute(u"name")

649

== u"org.freedesktop.DBus.Properties"):

650

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

651

if cn.getAttribute(u"name") == u"Get":

652

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

653

if (arg.getAttribute(u"direction")

654

== u"out"):

655

arg.setAttribute(u"name", u"value")

656

elif cn.getAttribute(u"name") == u"GetAll":

657

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

658

if (arg.getAttribute(u"direction")

659

== u"out"):

660

arg.setAttribute(u"name", u"props")

661

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

870

if (if_tag.getAttribute("name")

871

== "org.freedesktop.DBus.Properties"):

872

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

873

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

874

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

875

if (arg.getAttribute("direction")

876

== "out"):

877

arg.setAttribute("name", "value")

878

elif cn.getAttribute("name") == "GetAll":

879

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

880

if (arg.getAttribute("direction")

881

== "out"):

882

arg.setAttribute("name", "props")

883

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

662

884

document.unlink()

663

885

except (AttributeError, xml.dom.DOMException,

664

xml.parsers.expat.ExpatError), error:

665

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

886

xml.parsers.expat.ExpatError) as error:

887

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

666

888

error)

667

889

return xmlstring

668

890

669

891

892

def datetime_to_dbus (dt, variant_level=0):

893

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

894

if dt is None:

895

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

896

return dbus.String(dt.isoformat(),

897

variant_level=variant_level)

898

899

900

class AlternateDBusNamesMetaclass(DBusObjectWithProperties

901

.__metaclass__):

902

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

903

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

904

"""

905

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

906

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

907

# methods, signals, or properties in them

908

for base in (b for b in bases

909

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

910

# Go though all attributes of the base class

911

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

912

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

913

# with the wrong interface name

914

if (not hasattr(attribute, "_dbus_interface")

915

or not attribute._dbus_interface

916

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

917

continue

918

# Create an alternate D-Bus interface name based on

919

# the current name

920

alt_interface = (attribute._dbus_interface

921

.replace("se.recompile.Mandos",

922

"se.bsnet.fukt.Mandos"))

923

# Is this a D-Bus signal?

924

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

925

# Extract the original non-method function by

926

# black magic

927

nonmethod_func = (dict(

928

zip(attribute.func_code.co_freevars,

929

attribute.__closure__))["func"]

930

.cell_contents)

931

# Create a new, but exactly alike, function

932

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

933

# with the alternate D-Bus interface name

934

new_function = (dbus.service.signal

935

(alt_interface,

936

attribute._dbus_signature)

937

(types.FunctionType(

938

nonmethod_func.func_code,

939

nonmethod_func.func_globals,

940

nonmethod_func.func_name,

941

nonmethod_func.func_defaults,

942

nonmethod_func.func_closure)))

943

# Define a creator of a function to call both the

944

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

945

# signals gets sent when the function is called

946

def fixscope(func1, func2):

947

"""This function is a scope container to pass

948

func1 and func2 to the "call_both" function

949

outside of its arguments"""

950

def call_both(*args, **kwargs):

951

"""This function will emit two D-Bus

952

signals by calling func1 and func2"""

953

func1(*args, **kwargs)

954

func2(*args, **kwargs)

955

return call_both

956

# Create the "call_both" function and add it to

957

# the class

958

attr[attrname] = fixscope(attribute,

959

new_function)

960

# Is this a D-Bus method?

961

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

962

# Create a new, but exactly alike, function

963

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

964

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

965

# to the class.

966

attr[attrname] = (dbus.service.method

967

(alt_interface,

968

attribute._dbus_in_signature,

969

attribute._dbus_out_signature)

970

(types.FunctionType

971

(attribute.func_code,

972

attribute.func_globals,

973

attribute.func_name,

974

attribute.func_defaults,

975

attribute.func_closure)))

976

# Is this a D-Bus property?

977

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

978

# Create a new, but exactly alike, function

979

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

980

# property with the alternate D-Bus interface

981

# name. Add it to the class.

982

attr[attrname] = (dbus_service_property

983

(alt_interface,

984

attribute._dbus_signature,

985

attribute._dbus_access,

986

attribute

987

._dbus_get_args_options

988

["byte_arrays"])

989

(types.FunctionType

990

(attribute.func_code,

991

attribute.func_globals,

992

attribute.func_name,

993

attribute.func_defaults,

994

attribute.func_closure)))

995

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

996

997

670

998

class ClientDBus(Client, DBusObjectWithProperties):

671

999

"""A Client class using D-Bus

672

1000

674

1002

dbus_object_path: dbus.ObjectPath

675

1003

bus: dbus.SystemBus()

676

1004

"""

1005

1006

runtime_expansions = (Client.runtime_expansions

1007

+ ("dbus_object_path",))

1008

677

1009

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

678

1010

679

1011

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

680

1012

self.bus = bus

681

1013

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

1014

1015

self._approvals_pending = 0

682

1016

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

683

1017

# the D-Bus

1018

client_object_name = unicode(self.name).translate(

1019

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

1020

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

684

1021

self.dbus_object_path = (dbus.ObjectPath

685

(u"/clients/"

686

+ self.name.replace(u".", u"_")))

1022

("/clients/" + client_object_name))

687

1023

DBusObjectWithProperties.__init__(self, self.bus,

688

1024

self.dbus_object_path)

689

690

@staticmethod

691

def _datetime_to_dbus(dt, variant_level=0):

692

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

693

return dbus.String(dt.isoformat(),

694

variant_level=variant_level)

695

696

def enable(self):

697

oldstate = getattr(self, u"enabled", False)

698

r = Client.enable(self)

699

if oldstate != self.enabled:

700

# Emit D-Bus signals

701

self.PropertyChanged(dbus.String(u"enabled"),

702

dbus.Boolean(True, variant_level=1))

703

self.PropertyChanged(

704

dbus.String(u"last_enabled"),

705

self._datetime_to_dbus(self.last_enabled,

706

variant_level=1))

707

return r

708

709

def disable(self, quiet = False):

710

oldstate = getattr(self, u"enabled", False)

711

r = Client.disable(self, quiet=quiet)

712

if not quiet and oldstate != self.enabled:

713

# Emit D-Bus signal

714

self.PropertyChanged(dbus.String(u"enabled"),

715

dbus.Boolean(False, variant_level=1))

716

return r

1025

1026

def notifychangeproperty(transform_func,

1027

dbus_name, type_func=lambda x: x,

1028

variant_level=1):

1029

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

1030

its changes to DBus.

1031

1032

transform_fun: Function that takes a value and a variant_level

1033

and transforms it to a D-Bus type.

1034

dbus_name: D-Bus name of the variable

1035

type_func: Function that transform the value before sending it

1036

to the D-Bus. Default: no transform

1037

variant_level: D-Bus variant level. Default: 1

1038

"""

1039

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

1040

def setter(self, value):

1041

if hasattr(self, "dbus_object_path"):

1042

if (not hasattr(self, attrname) or

1043

type_func(getattr(self, attrname, None))

1044

!= type_func(value)):

1045

dbus_value = transform_func(type_func(value),

1046

variant_level

1047

=variant_level)

1048

self.PropertyChanged(dbus.String(dbus_name),

1049

dbus_value)

1050

setattr(self, attrname, value)

1051

1052

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

1053

1054

1055

expires = notifychangeproperty(datetime_to_dbus, "Expires")

1056

approvals_pending = notifychangeproperty(dbus.Boolean,

1057

"ApprovalPending",

1058

type_func = bool)

1059

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

1060

last_enabled = notifychangeproperty(datetime_to_dbus,

1061

"LastEnabled")

1062

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

1063

type_func = lambda checker:

1064

checker is not None)

1065

last_checked_ok = notifychangeproperty(datetime_to_dbus,

1066

"LastCheckedOK")

1067

last_approval_request = notifychangeproperty(

1068

datetime_to_dbus, "LastApprovalRequest")

1069

approved_by_default = notifychangeproperty(dbus.Boolean,

1070

"ApprovedByDefault")

1071

approval_delay = notifychangeproperty(dbus.UInt16,

1072

"ApprovalDelay",

1073

type_func =

1074

_timedelta_to_milliseconds)

1075

approval_duration = notifychangeproperty(

1076

dbus.UInt16, "ApprovalDuration",

1077

type_func = _timedelta_to_milliseconds)

1078

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

1079

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

1080

type_func =

1081

_timedelta_to_milliseconds)

1082

extended_timeout = notifychangeproperty(

1083

dbus.UInt16, "ExtendedTimeout",

1084

type_func = _timedelta_to_milliseconds)

1085

interval = notifychangeproperty(dbus.UInt16,

1086

"Interval",

1087

type_func =

1088

_timedelta_to_milliseconds)

1089

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

1090

1091

del notifychangeproperty

717

1092

718

1093

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

719

1094

try:

720

1095

self.remove_from_connection()

721

1096

except LookupError:

722

1097

pass

723

if hasattr(DBusObjectWithProperties, u"__del__"):

1098

if hasattr(DBusObjectWithProperties, "__del__"):

724

1099

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

725

1100

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

726

1101

728

1103

*args, **kwargs):

729

1104

self.checker_callback_tag = None

730

1105

self.checker = None

731

# Emit D-Bus signal

732

self.PropertyChanged(dbus.String(u"checker_running"),

733

dbus.Boolean(False, variant_level=1))

734

1106

if os.WIFEXITED(condition):

735

1107

exitstatus = os.WEXITSTATUS(condition)

736

1108

# Emit D-Bus signal

746

1118

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

747

1119

*args, **kwargs)

748

1120

749

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

750

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

751

# Emit D-Bus signal

752

self.PropertyChanged(

753

dbus.String(u"last_checked_ok"),

754

(self._datetime_to_dbus(self.last_checked_ok,

755

variant_level=1)))

756

return r

757

758

1121

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

759

1122

old_checker = self.checker

760

1123

if self.checker is not None:

767

1130

and old_checker_pid != self.checker.pid):

768

1131

# Emit D-Bus signal

769

1132

self.CheckerStarted(self.current_checker_command)

770

self.PropertyChanged(

771

dbus.String(u"checker_running"),

772

dbus.Boolean(True, variant_level=1))

773

return r

774

775

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

776

old_checker = getattr(self, u"checker", None)

777

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

778

if (old_checker is not None

779

and getattr(self, u"checker", None) is None):

780

self.PropertyChanged(dbus.String(u"checker_running"),

781

dbus.Boolean(False, variant_level=1))

782

return r

783

784

## D-Bus methods & signals

785

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

786

787

# CheckedOK - method

788

@dbus.service.method(_interface)

789

def CheckedOK(self):

790

return self.checked_ok()

1133

return r

1134

1135

def _reset_approved(self):

1136

self._approved = None

1137

return False

1138

1139

def approve(self, value=True):

1140

self.send_changedstate()

1141

self._approved = value

1142

gobject.timeout_add(_timedelta_to_milliseconds

1143

(self.approval_duration),

1144

self._reset_approved)

1145

1146

1147

## D-Bus methods, signals & properties

1148

_interface = "se.recompile.Mandos.Client"

1149

1150

## Signals

791

1151

792

1152

# CheckerCompleted - signal

793

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

1153

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

794

1154

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

795

1155

"D-Bus signal"

796

1156

pass

797

1157

798

1158

# CheckerStarted - signal

799

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

1159

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

800

1160

def CheckerStarted(self, command):

801

1161

"D-Bus signal"

802

1162

pass

803

1163

804

1164

# PropertyChanged - signal

805

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

1165

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

806

1166

def PropertyChanged(self, property, value):

807

1167

"D-Bus signal"

808

1168

pass

810

1170

# GotSecret - signal

811

1171

@dbus.service.signal(_interface)

812

1172

def GotSecret(self):

813

"D-Bus signal"

1173

"""D-Bus signal

1174

Is sent after a successful transfer of secret from the Mandos

1175

server to mandos-client

1176

"""

814

1177

pass

815

1178

816

1179

# Rejected - signal

817

@dbus.service.signal(_interface)

818

def Rejected(self):

819

"D-Bus signal"

820

pass

1180

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

1181

def Rejected(self, reason):

1182

"D-Bus signal"

1183

pass

1184

1185

# NeedApproval - signal

1186

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

1187

def NeedApproval(self, timeout, default):

1188

"D-Bus signal"

1189

return self.need_approval()

1190

1191

# NeRwequest - signal

1192

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

1193

def NewRequest(self, ip):

1194

"""D-Bus signal

1195

Is sent after a client request a password.

1196

"""

1197

pass

1198

1199

## Methods

1200

1201

# Approve - method

1202

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

1203

def Approve(self, value):

1204

self.approve(value)

1205

1206

# CheckedOK - method

1207

@dbus.service.method(_interface)

1208

def CheckedOK(self):

1209

self.checked_ok()

821

1210

822

1211

# Enable - method

823

1212

@dbus.service.method(_interface)

842

1231

def StopChecker(self):

843

1232

self.stop_checker()

844

1233

845

# name - property

846

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

847

def name_dbus_property(self):

1234

## Properties

1235

1236

# ApprovalPending - property

1237

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

1238

def ApprovalPending_dbus_property(self):

1239

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

1240

1241

# ApprovedByDefault - property

1242

@dbus_service_property(_interface, signature="b",

1243

access="readwrite")

1244

def ApprovedByDefault_dbus_property(self, value=None):

1245

if value is None: # get

1246

return dbus.Boolean(self.approved_by_default)

1247

self.approved_by_default = bool(value)

1248

1249

# ApprovalDelay - property

1250

@dbus_service_property(_interface, signature="t",

1251

access="readwrite")

1252

def ApprovalDelay_dbus_property(self, value=None):

1253

if value is None: # get

1254

return dbus.UInt64(self.approval_delay_milliseconds())

1255

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

1256

1257

# ApprovalDuration - property

1258

@dbus_service_property(_interface, signature="t",

1259

access="readwrite")

1260

def ApprovalDuration_dbus_property(self, value=None):

1261

if value is None: # get

1262

return dbus.UInt64(_timedelta_to_milliseconds(

1263

self.approval_duration))

1264

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

1265

1266

# Name - property

1267

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

1268

def Name_dbus_property(self):

848

1269

return dbus.String(self.name)

849

1270

850

# fingerprint - property

851

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

852

def fingerprint_dbus_property(self):

1271

# Fingerprint - property

1272

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

1273

def Fingerprint_dbus_property(self):

853

1274

return dbus.String(self.fingerprint)

854

1275

855

# host - property

856

@dbus_service_property(_interface, signature=u"s",

857

access=u"readwrite")

858

def host_dbus_property(self, value=None):

1276

# Host - property

1277

@dbus_service_property(_interface, signature="s",

1278

access="readwrite")

1279

def Host_dbus_property(self, value=None):

859

1280

if value is None: # get

860

1281

return dbus.String(self.host)

861

1282

self.host = value

862

# Emit D-Bus signal

863

self.PropertyChanged(dbus.String(u"host"),

864

dbus.String(value, variant_level=1))

865

866

# created - property

867

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

868

def created_dbus_property(self):

869

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

870

871

# last_enabled - property

872

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

873

def last_enabled_dbus_property(self):

874

if self.last_enabled is None:

875

return dbus.String(u"")

876

return dbus.String(self._datetime_to_dbus(self.last_enabled))

877

878

# enabled - property

879

@dbus_service_property(_interface, signature=u"b",

880

access=u"readwrite")

881

def enabled_dbus_property(self, value=None):

1283

1284

# Created - property

1285

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

1286

def Created_dbus_property(self):

1287

return datetime_to_dbus(self.created)

1288

1289

# LastEnabled - property

1290

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

1291

def LastEnabled_dbus_property(self):

1292

return datetime_to_dbus(self.last_enabled)

1293

1294

# Enabled - property

1295

@dbus_service_property(_interface, signature="b",

1296

access="readwrite")

1297

def Enabled_dbus_property(self, value=None):

882

1298

if value is None: # get

883

1299

return dbus.Boolean(self.enabled)

884

1300

if value:

886

1302

else:

887

1303

self.disable()

888

1304

889

# last_checked_ok - property

890

@dbus_service_property(_interface, signature=u"s",

891

access=u"readwrite")

892

def last_checked_ok_dbus_property(self, value=None):

1305

# LastCheckedOK - property

1306

@dbus_service_property(_interface, signature="s",

1307

access="readwrite")

1308

def LastCheckedOK_dbus_property(self, value=None):

893

1309

if value is not None:

894

1310

self.checked_ok()

895

1311

return

896

if self.last_checked_ok is None:

897

return dbus.String(u"")

898

return dbus.String(self._datetime_to_dbus(self

899

.last_checked_ok))

900

901

# timeout - property

902

@dbus_service_property(_interface, signature=u"t",

903

access=u"readwrite")

904

def timeout_dbus_property(self, value=None):

1312

return datetime_to_dbus(self.last_checked_ok)

1313

1314

# Expires - property

1315

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

1316

def Expires_dbus_property(self):

1317

return datetime_to_dbus(self.expires)

1318

1319

# LastApprovalRequest - property

1320

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

1321

def LastApprovalRequest_dbus_property(self):

1322

return datetime_to_dbus(self.last_approval_request)

1323

1324

# Timeout - property

1325

@dbus_service_property(_interface, signature="t",

1326

access="readwrite")

1327

def Timeout_dbus_property(self, value=None):

905

1328

if value is None: # get

906

1329

return dbus.UInt64(self.timeout_milliseconds())

907

1330

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

908

# Emit D-Bus signal

909

self.PropertyChanged(dbus.String(u"timeout"),

910

dbus.UInt64(value, variant_level=1))

911

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

1331

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

912

1332

return

913

1333

# Reschedule timeout

914

1334

gobject.source_remove(self.disable_initiator_tag)

915

1335

self.disable_initiator_tag = None

916

time_to_die = (self.

917

_timedelta_to_milliseconds((self

918

.last_checked_ok

919

+ self.timeout)

920

- datetime.datetime

921

.utcnow()))

1336

self.expires = None

1337

time_to_die = _timedelta_to_milliseconds((self

1338

.last_checked_ok

1339

+ self.timeout)

1340

- datetime.datetime

1341

.utcnow())

922

1342

if time_to_die <= 0:

923

1343

# The timeout has passed

924

1344

self.disable()

925

1345

else:

1346

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

1347

+ datetime.timedelta(milliseconds =

1348

time_to_die))

926

1349

self.disable_initiator_tag = (gobject.timeout_add

927

1350

(time_to_die, self.disable))

928

1351

929

# interval - property

930

@dbus_service_property(_interface, signature=u"t",

931

access=u"readwrite")

932

def interval_dbus_property(self, value=None):

1352

# ExtendedTimeout - property

1353

@dbus_service_property(_interface, signature="t",

1354

access="readwrite")

1355

def ExtendedTimeout_dbus_property(self, value=None):

1356

if value is None: # get

1357

return dbus.UInt64(self.extended_timeout_milliseconds())

1358

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

1359

1360

# Interval - property

1361

@dbus_service_property(_interface, signature="t",

1362

access="readwrite")

1363

def Interval_dbus_property(self, value=None):

933

1364

if value is None: # get

934

1365

return dbus.UInt64(self.interval_milliseconds())

935

1366

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

936

# Emit D-Bus signal

937

self.PropertyChanged(dbus.String(u"interval"),

938

dbus.UInt64(value, variant_level=1))

939

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

1367

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

940

1368

return

941

# Reschedule checker run

942

gobject.source_remove(self.checker_initiator_tag)

943

self.checker_initiator_tag = (gobject.timeout_add

944

(value, self.start_checker))

945

self.start_checker() # Start one now, too

946

947

# checker - property

948

@dbus_service_property(_interface, signature=u"s",

949

access=u"readwrite")

950

def checker_dbus_property(self, value=None):

1369

if self.enabled:

1370

# Reschedule checker run

1371

gobject.source_remove(self.checker_initiator_tag)

1372

self.checker_initiator_tag = (gobject.timeout_add

1373

(value, self.start_checker))

1374

self.start_checker() # Start one now, too

1375

1376

# Checker - property

1377

@dbus_service_property(_interface, signature="s",

1378

access="readwrite")

1379

def Checker_dbus_property(self, value=None):

951

1380

if value is None: # get

952

1381

return dbus.String(self.checker_command)

953

1382

self.checker_command = value

954

# Emit D-Bus signal

955

self.PropertyChanged(dbus.String(u"checker"),

956

dbus.String(self.checker_command,

957

variant_level=1))

958

1383

959

# checker_running - property

960

@dbus_service_property(_interface, signature=u"b",

961

access=u"readwrite")

962

def checker_running_dbus_property(self, value=None):

1384

# CheckerRunning - property

1385

@dbus_service_property(_interface, signature="b",

1386

access="readwrite")

1387

def CheckerRunning_dbus_property(self, value=None):

963

1388

if value is None: # get

964

1389

return dbus.Boolean(self.checker is not None)

965

1390

if value:

967

1392

else:

968

1393

self.stop_checker()

969

1394

970

# object_path - property

971

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

972

def object_path_dbus_property(self):

1395

# ObjectPath - property

1396

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

1397

def ObjectPath_dbus_property(self):

973

1398

return self.dbus_object_path # is already a dbus.ObjectPath

974

1399

975

# secret = property

976

@dbus_service_property(_interface, signature=u"ay",

977

access=u"write", byte_arrays=True)

978

def secret_dbus_property(self, value):

1400

# Secret = property

1401

@dbus_service_property(_interface, signature="ay",

1402

access="write", byte_arrays=True)

1403

def Secret_dbus_property(self, value):

979

1404

self.secret = str(value)

980

1405

981

1406

del _interface

982

1407

983

1408

1409

class ProxyClient(object):

1410

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

1411

self._pipe = child_pipe

1412

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

1413

if not self._pipe.recv():

1414

raise KeyError()

1415

1416

def __getattribute__(self, name):

1417

if(name == '_pipe'):

1418

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

1419

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

1420

data = self._pipe.recv()

1421

if data[0] == 'data':

1422

return data[1]

1423

if data[0] == 'function':

1424

def func(*args, **kwargs):

1425

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

1426

return self._pipe.recv()[1]

1427

return func

1428

1429

def __setattr__(self, name, value):

1430

if(name == '_pipe'):

1431

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

1432

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

1433

1434

1435

class ClientDBusTransitional(ClientDBus):

1436

__metaclass__ = AlternateDBusNamesMetaclass

1437

1438

984

1439

class ClientHandler(socketserver.BaseRequestHandler, object):

985

1440

"""A class to handle client connections.

986

1441

988

1443

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

989

1444

990

1445

def handle(self):

991

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

992

unicode(self.client_address))

993

logger.debug(u"IPC Pipe FD: %d", self.server.pipe[1])

994

# Open IPC pipe to parent process

995

with closing(os.fdopen(self.server.pipe[1], u"w", 1)) as ipc:

1446

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

1447

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

1448

unicode(self.client_address))

1449

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

1450

self.server.child_pipe.fileno())

1451

996

1452

session = (gnutls.connection

997

1453

.ClientSession(self.request,

998

1454

gnutls.connection

999

1455

.X509Credentials()))

1000

1456

1001

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

1002

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

1003

try:

1004

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

1005

raise RuntimeError

1006

except (ValueError, IndexError, RuntimeError), error:

1007

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

1008

return

1009

1010

1457

# Note: gnutls.connection.X509Credentials is really a

1011

1458

# generic GnuTLS certificate credentials object so long as

1012

1459

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

1013

1460

# here despite using OpenPGP certificates.

1014

1461

1015

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

1016

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

1017

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

1018

# u"+DHE-DSS"))

1462

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

1463

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

1464

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

1465

# "+DHE-DSS"))

1019

1466

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

1020

1467

priority = self.server.gnutls_priority

1021

1468

if priority is None:

1022

priority = u"NORMAL"

1469

priority = "NORMAL"

1023

1470

(gnutls.library.functions

1024

1471

.gnutls_priority_set_direct(session._c_object,

1025

1472

priority, None))

1026

1473

1474

# Start communication using the Mandos protocol

1475

# Get protocol number

1476

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

1477

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

1478

try:

1479

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

1480

raise RuntimeError

1481

except (ValueError, IndexError, RuntimeError) as error:

1482

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

1483

return

1484

1485

# Start GnuTLS connection

1027

1486

try:

1028

1487

session.handshake()

1029

except gnutls.errors.GNUTLSError, error:

1030

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

1488

except gnutls.errors.GNUTLSError as error:

1489

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

1031

1490

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

1032

1491

# established. Just abandon the request.

1033

1492

return

1034

logger.debug(u"Handshake succeeded")

1493

logger.debug("Handshake succeeded")

1494

1495

approval_required = False

1035

1496

try:

1036

fpr = self.fingerprint(self.peer_certificate(session))

1037

except (TypeError, gnutls.errors.GNUTLSError), error:

1038

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

1039

session.bye()

1040

return

1041

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

1497

try:

1498

fpr = self.fingerprint(self.peer_certificate

1499

(session))

1500

except (TypeError,

1501

gnutls.errors.GNUTLSError) as error:

1502

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

1503

return

1504

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

1505

if self.server.use_dbus:

1506

# Emit D-Bus signal

1507

client.NewRequest(str(self.client_address))

1508

1509

try:

1510

client = ProxyClient(child_pipe, fpr,

1511

self.client_address)

1512

except KeyError:

1513

return

1514

1515

if client.approval_delay:

1516

delay = client.approval_delay

1517

client.approvals_pending += 1

1518

approval_required = True

1519

1520

while True:

1521

if not client.enabled:

1522

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

1523

client.name)

1524

if self.server.use_dbus:

1525

# Emit D-Bus signal

1526

client.Rejected("Disabled")

1527

return

1528

1529

if client._approved or not client.approval_delay:

1530

#We are approved or approval is disabled

1531

break

1532

elif client._approved is None:

1533

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

1534

client.name)

1535

if self.server.use_dbus:

1536

# Emit D-Bus signal

1537

client.NeedApproval(

1538

client.approval_delay_milliseconds(),

1539

client.approved_by_default)

1540

else:

1541

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

1542

client.name)

1543

if self.server.use_dbus:

1544

# Emit D-Bus signal

1545

client.Rejected("Denied")

1546

return

1547

1548

#wait until timeout or approved

1549

time = datetime.datetime.now()

1550

client.changedstate.acquire()

1551

(client.changedstate.wait

1552

(float(client._timedelta_to_milliseconds(delay)

1553

/ 1000)))

1554

client.changedstate.release()

1555

time2 = datetime.datetime.now()

1556

if (time2 - time) >= delay:

1557

if not client.approved_by_default:

1558

logger.warning("Client %s timed out while"

1559

" waiting for approval",

1560

client.name)

1561

if self.server.use_dbus:

1562

# Emit D-Bus signal

1563

client.Rejected("Approval timed out")

1564

return

1565

else:

1566

break

1567

else:

1568

delay -= time2 - time

1569

1570

sent_size = 0

1571

while sent_size < len(client.secret):

1572

try:

1573

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

1574

except gnutls.errors.GNUTLSError as error:

1575

logger.warning("gnutls send failed")

1576

return

1577

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

1578

sent, len(client.secret)

1579

- (sent_size + sent))

1580

sent_size += sent

1581

1582

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

1583

# bump the timeout using extended_timeout

1584

client.checked_ok(client.extended_timeout)

1585

if self.server.use_dbus:

1586

# Emit D-Bus signal

1587

client.GotSecret()

1042

1588

1043

for c in self.server.clients:

1044

if c.fingerprint == fpr:

1045

client = c

1046

break

1047

else:

1048

ipc.write(u"NOTFOUND %s %s\n"

1049

% (fpr, unicode(self.client_address)))

1050

session.bye()

1051

return

1052

# Have to check if client.still_valid(), since it is

1053

# possible that the client timed out while establishing

1054

# the GnuTLS session.

1055

if not client.still_valid():

1056

ipc.write(u"INVALID %s\n" % client.name)

1057

session.bye()

1058

return

1059

ipc.write(u"SENDING %s\n" % client.name)

1060

sent_size = 0

1061

while sent_size < len(client.secret):

1062

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

1063

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

1064

sent, len(client.secret)

1065

- (sent_size + sent))

1066

sent_size += sent

1067

session.bye()

1589

finally:

1590

if approval_required:

1591

client.approvals_pending -= 1

1592

try:

1593

session.bye()

1594

except gnutls.errors.GNUTLSError as error:

1595

logger.warning("GnuTLS bye failed")

1068

1596

1069

1597

@staticmethod

1070

1598

def peer_certificate(session):

1080

1608

.gnutls_certificate_get_peers

1081

1609

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

1082

1610

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

1083

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

1084

u" certificate")

1611

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

1612

" certificate")

1085

1613

if list_size.value == 0:

1086

1614

return None

1087

1615

cert = cert_list[0]

1113

1641

if crtverify.value != 0:

1114

1642

gnutls.library.functions.gnutls_openpgp_crt_deinit(crt)

1115

1643

raise (gnutls.errors.CertificateSecurityError

1116

(u"Verify failed"))

1644

("Verify failed"))

1117

1645

# New buffer for the fingerprint

1118

1646

buf = ctypes.create_string_buffer(20)

1119

1647

buf_len = ctypes.c_size_t()

1126

1654

# Convert the buffer to a Python bytestring

1127

1655

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

1128

1656

# Convert the bytestring to hexadecimal notation

1129

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

1657

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

1130

1658

return hex_fpr

1131

1659

1132

1660

1133

class ForkingMixInWithPipe(socketserver.ForkingMixIn, object):

1134

"""Like socketserver.ForkingMixIn, but also pass a pipe."""

1661

class MultiprocessingMixIn(object):

1662

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

1663

def sub_process_main(self, request, address):

1664

try:

1665

self.finish_request(request, address)

1666

except:

1667

self.handle_error(request, address)

1668

self.close_request(request)

1669

1670

def process_request(self, request, address):

1671

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

1672

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

1673

args = (request,

1674

address))

1675

proc.start()

1676

return proc

1677

1678

1679

class MultiprocessingMixInWithPipe(MultiprocessingMixIn, object):

1680

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

1135

1681

def process_request(self, request, client_address):

1136

1682

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

1137

1683

1138

1684

This function creates a new pipe in self.pipe

1139

1685

"""

1140

self.pipe = os.pipe()

1141

super(ForkingMixInWithPipe,

1142

self).process_request(request, client_address)

1143

os.close(self.pipe[1]) # close write end

1144

self.add_pipe(self.pipe[0])

1145

def add_pipe(self, pipe):

1686

parent_pipe, self.child_pipe = multiprocessing.Pipe()

1687

1688

proc = MultiprocessingMixIn.process_request(self, request,

1689

client_address)

1690

self.child_pipe.close()

1691

self.add_pipe(parent_pipe, proc)

1692

1693

def add_pipe(self, parent_pipe, proc):

1146

1694

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

1147

os.close(pipe)

1148

1149

1150

class IPv6_TCPServer(ForkingMixInWithPipe,

1695

raise NotImplementedError

1696

1697

1698

class IPv6_TCPServer(MultiprocessingMixInWithPipe,

1151

1699

socketserver.TCPServer, object):

1152

1700

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

1153

1701

1169

1717

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

1170

1718

if self.interface is not None:

1171

1719

if SO_BINDTODEVICE is None:

1172

logger.error(u"SO_BINDTODEVICE does not exist;"

1173

u" cannot bind to interface %s",

1720

logger.error("SO_BINDTODEVICE does not exist;"

1721

" cannot bind to interface %s",

1174

1722

self.interface)

1175

1723

else:

1176

1724

try:

1177

1725

self.socket.setsockopt(socket.SOL_SOCKET,

1178

1726

SO_BINDTODEVICE,

1179

1727

str(self.interface

1180

+ u'\0'))

1181

except socket.error, error:

1728

+ '\0'))

1729

except socket.error as error:

1182

1730

if error[0] == errno.EPERM:

1183

logger.error(u"No permission to"

1184

u" bind to interface %s",

1731

logger.error("No permission to"

1732

" bind to interface %s",

1185

1733

self.interface)

1186

1734

elif error[0] == errno.ENOPROTOOPT:

1187

logger.error(u"SO_BINDTODEVICE not available;"

1188

u" cannot bind to interface %s",

1735

logger.error("SO_BINDTODEVICE not available;"

1736

" cannot bind to interface %s",

1189

1737

self.interface)

1190

1738

else:

1191

1739

raise

1193

1741

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

1194

1742

if not self.server_address[0]:

1195

1743

if self.address_family == socket.AF_INET6:

1196

any_address = u"::" # in6addr_any

1744

any_address = "::" # in6addr_any

1197

1745

else:

1198

1746

any_address = socket.INADDR_ANY

1199

1747

self.server_address = (any_address,

1226

1774

self.enabled = False

1227

1775

self.clients = clients

1228

1776

if self.clients is None:

1229

self.clients = set()

1777

self.clients = {}

1230

1778

self.use_dbus = use_dbus

1231

1779

self.gnutls_priority = gnutls_priority

1232

1780

IPv6_TCPServer.__init__(self, server_address,

1236

1784

def server_activate(self):

1237

1785

if self.enabled:

1238

1786

return socketserver.TCPServer.server_activate(self)

1787

1239

1788

def enable(self):

1240

1789

self.enabled = True

1241

def add_pipe(self, pipe):

1790

1791

def add_pipe(self, parent_pipe, proc):

1242

1792

# Call "handle_ipc" for both data and EOF events

1243

gobject.io_add_watch(pipe, gobject.IO_IN | gobject.IO_HUP,

1244

self.handle_ipc)

1245

def handle_ipc(self, source, condition, file_objects={}):

1793

gobject.io_add_watch(parent_pipe.fileno(),

1794

gobject.IO_IN | gobject.IO_HUP,

1795

functools.partial(self.handle_ipc,

1796

parent_pipe =

1797

parent_pipe,

1798

proc = proc))

1799

1800

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

1801

proc = None, client_object=None):

1246

1802

condition_names = {

1247

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

1248

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

1803

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

1804

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

1249

1805

# blocking).

1250

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

1251

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

1252

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

1806

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

1807

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

1808

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

1253

1809

# broken, usually for pipes and

1254

1810

# sockets).

1255

1811

}

1257

1813

for cond, name in

1258

1814

condition_names.iteritems()

1259

1815

if cond & condition)

1260

logger.debug(u"Handling IPC: FD = %d, condition = %s", source,

1261

conditions_string)

1262

1263

# Turn the pipe file descriptor into a Python file object

1264

if source not in file_objects:

1265

file_objects[source] = os.fdopen(source, u"r", 1)

1266

1267

# Read a line from the file object

1268

cmdline = file_objects[source].readline()

1269

if not cmdline: # Empty line means end of file

1270

# close the IPC pipe

1271

file_objects[source].close()

1272

del file_objects[source]

1273

1274

# Stop calling this function

1275

return False

1276

1277

logger.debug(u"IPC command: %r", cmdline)

1278

1279

# Parse and act on command

1280

cmd, args = cmdline.rstrip(u"\r\n").split(None, 1)

1281

1282

if cmd == u"NOTFOUND":

1283

fpr, address = args.split(None, 1)

1284

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

1285

u"dress: %s", fpr, address)

1286

if self.use_dbus:

1287

# Emit D-Bus signal

1288

mandos_dbus_service.ClientNotFound(fpr, address)

1289

elif cmd == u"INVALID":

1290

for client in self.clients:

1291

if client.name == args:

1292

logger.warning(u"Client %s is invalid", args)

1293

if self.use_dbus:

1294

# Emit D-Bus signal

1295

client.Rejected()

1296

break

1297

else:

1298

logger.error(u"Unknown client %s is invalid", args)

1299

elif cmd == u"SENDING":

1300

for client in self.clients:

1301

if client.name == args:

1302

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

1303

client.checked_ok()

1304

if self.use_dbus:

1305

# Emit D-Bus signal

1306

client.GotSecret()

1307

break

1308

else:

1309

logger.error(u"Sending secret to unknown client %s",

1310

args)

1311

else:

1312

logger.error(u"Unknown IPC command: %r", cmdline)

1313

1314

# Keep calling this function

1816

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

1817

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

1818

# Wait for other process to exit

1819

proc.join()

1820

return False

1821

1822

# Read a request from the child

1823

request = parent_pipe.recv()

1824

command = request[0]

1825

1826

if command == 'init':

1827

fpr = request[1]

1828

address = request[2]

1829

1830

for c in self.clients.itervalues():

1831

if c.fingerprint == fpr:

1832

client = c

1833

break

1834

else:

1835

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

1836

"dress: %s", fpr, address)

1837

if self.use_dbus:

1838

# Emit D-Bus signal

1839

mandos_dbus_service.ClientNotFound(fpr,

1840

address[0])

1841

parent_pipe.send(False)

1842

return False

1843

1844

gobject.io_add_watch(parent_pipe.fileno(),

1845

gobject.IO_IN | gobject.IO_HUP,

1846

functools.partial(self.handle_ipc,

1847

parent_pipe =

1848

parent_pipe,

1849

proc = proc,

1850

client_object =

1851

client))

1852

parent_pipe.send(True)

1853

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

1854

# same fileno

1855

return False

1856

if command == 'funcall':

1857

funcname = request[1]

1858

args = request[2]

1859

kwargs = request[3]

1860

1861

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

1862

funcname)(*args,

1863

**kwargs)))

1864

1865

if command == 'getattr':

1866

attrname = request[1]

1867

if callable(client_object.__getattribute__(attrname)):

1868

parent_pipe.send(('function',))

1869

else:

1870

parent_pipe.send(('data', client_object

1871

.__getattribute__(attrname)))

1872

1873

if command == 'setattr':

1874

attrname = request[1]

1875

value = request[2]

1876

setattr(client_object, attrname, value)

1877

1315

1878

return True

1316

1879

1317

1880

1318

1881

def string_to_delta(interval):

1319

1882

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

1320

1883

1321

>>> string_to_delta(u'7d')

1884

>>> string_to_delta('7d')

1322

1885

datetime.timedelta(7)

1323

>>> string_to_delta(u'60s')

1886

>>> string_to_delta('60s')

1324

1887

datetime.timedelta(0, 60)

1325

>>> string_to_delta(u'60m')

1888

>>> string_to_delta('60m')

1326

1889

datetime.timedelta(0, 3600)

1327

>>> string_to_delta(u'24h')

1890

>>> string_to_delta('24h')

1328

1891

datetime.timedelta(1)

1329

>>> string_to_delta(u'1w')

1892

>>> string_to_delta('1w')

1330

1893

datetime.timedelta(7)

1331

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

1894

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

1332

1895

datetime.timedelta(0, 330)

1333

1896

"""

1334

1897

timevalue = datetime.timedelta(0)

1336

1899

try:

1337

1900

suffix = unicode(s[-1])

1338

1901

value = int(s[:-1])

1339

if suffix == u"d":

1902

if suffix == "d":

1340

1903

delta = datetime.timedelta(value)

1341

elif suffix == u"s":

1904

elif suffix == "s":

1342

1905

delta = datetime.timedelta(0, value)

1343

elif suffix == u"m":

1906

elif suffix == "m":

1344

1907

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

1345

elif suffix == u"h":

1908

elif suffix == "h":

1346

1909

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

1347

elif suffix == u"w":

1910

elif suffix == "w":

1348

1911

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

1349

1912

else:

1350

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

1351

except (ValueError, IndexError), e:

1352

raise ValueError(e.message)

1913

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

1914

except (ValueError, IndexError) as e:

1915

raise ValueError(*(e.args))

1353

1916

timevalue += delta

1354

1917

return timevalue

1355

1918

1356

1919

1357

def if_nametoindex(interface):

1358

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

1359

1360

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

1361

global if_nametoindex

1362

try:

1363

if_nametoindex = (ctypes.cdll.LoadLibrary

1364

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

1365

.if_nametoindex)

1366

except (OSError, AttributeError):

1367

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

1368

def if_nametoindex(interface):

1369

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

1370

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

1371

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

1372

ifreq = fcntl.ioctl(s, SIOCGIFINDEX,

1373

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

1374

interface))

1375

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

1376

ifreq[16:20])[0]

1377

return interface_index

1378

return if_nametoindex(interface)

1379

1380

1381

1920

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

1382

1921

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

1383

1922

1386

1925

sys.exit()

1387

1926

os.setsid()

1388

1927

if not nochdir:

1389

os.chdir(u"/")

1928

os.chdir("/")

1390

1929

if os.fork():

1391

1930

sys.exit()

1392

1931

if not noclose:

1394

1933

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

1395

1934

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

1396

1935

raise OSError(errno.ENODEV,

1397

u"%s not a character device"

1936

"%s not a character device"

1398

1937

% os.path.devnull)

1399

1938

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

1400

1939

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

1408

1947

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

1409

1948

# Parsing of options, both command line and config file

1410

1949

1411

parser = optparse.OptionParser(version = "%%prog %s" % version)

1412

parser.add_option("-i", u"--interface", type=u"string",

1413

metavar="IF", help=u"Bind to interface IF")

1414

parser.add_option("-a", u"--address", type=u"string",

1415

help=u"Address to listen for requests on")

1416

parser.add_option("-p", u"--port", type=u"int",

1417

help=u"Port number to receive requests on")

1418

parser.add_option("--check", action=u"store_true",

1419

help=u"Run self-test")

1420

parser.add_option("--debug", action=u"store_true",

1421

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

1422

u" terminal")

1423

parser.add_option("--priority", type=u"string", help=u"GnuTLS"

1424

u" priority string (see GnuTLS documentation)")

1425

parser.add_option("--servicename", type=u"string",

1426

metavar=u"NAME", help=u"Zeroconf service name")

1427

parser.add_option("--configdir", type=u"string",

1428

default=u"/etc/mandos", metavar=u"DIR",

1429

help=u"Directory to search for configuration"

1430

u" files")

1431

parser.add_option("--no-dbus", action=u"store_false",

1432

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

1433

u" system bus interface")

1434

parser.add_option("--no-ipv6", action=u"store_false",

1435

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

1436

options = parser.parse_args()[0]

1950

parser = argparse.ArgumentParser()

1951

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

1952

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

1953

help="show version number and exit")

1954

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

1955

help="Bind to interface IF")

1956

parser.add_argument("-a", "--address",

1957

help="Address to listen for requests on")

1958

parser.add_argument("-p", "--port", type=int,

1959

help="Port number to receive requests on")

1960

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

1961

help="Run self-test")

1962

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

1963

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

1964

" to terminal")

1965

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

1966

help="Debug level for stdout output")

1967

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

1968

" priority string (see GnuTLS documentation)")

1969

parser.add_argument("--servicename",

1970

metavar="NAME", help="Zeroconf service name")

1971

parser.add_argument("--configdir",

1972

default="/etc/mandos", metavar="DIR",

1973

help="Directory to search for configuration"

1974

" files")

1975

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

1976

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

1977

" system bus interface")

1978

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

1979

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

1980

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

1981

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

1982

" state")

1983

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

1984

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

1985

1986

options = parser.parse_args()

1437

1987

1438

1988

if options.check:

1439

1989

import doctest

1441

1991

sys.exit()

1442

1992

1443

1993

# Default values for config file for server-global settings

1444

server_defaults = { u"interface": u"",

1445

u"address": u"",

1446

u"port": u"",

1447

u"debug": u"False",

1448

u"priority":

1449

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

1450

u"servicename": u"Mandos",

1451

u"use_dbus": u"True",

1452

u"use_ipv6": u"True",

1994

server_defaults = { "interface": "",

1995

"address": "",

1996

"port": "",

1997

"debug": "False",

1998

"priority":

1999

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

2000

"servicename": "Mandos",

2001

"use_dbus": "True",

2002

"use_ipv6": "True",

2003

"debuglevel": "",

2004

"restore": "True",

2005

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

1453

2006

}

1454

2007

1455

2008

# Parse config file for server-global settings

1456

2009

server_config = configparser.SafeConfigParser(server_defaults)

1457

2010

del server_defaults

1458

2011

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

1459

u"mandos.conf"))

2012

"mandos.conf"))

1460

2013

# Convert the SafeConfigParser object to a dict

1461

2014

server_settings = server_config.defaults()

1462

2015

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

1463

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

1464

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

2016

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

2017

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

1465

2018

option)

1466

2019

if server_settings["port"]:

1467

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

1468

u"port")

2020

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

2021

"port")

1469

2022

del server_config

1470

2023

1471

2024

# Override the settings from the config file with command line

1472

2025

# options, if set.

1473

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

1474

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

1475

u"use_dbus", u"use_ipv6"):

2026

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

2027

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

2028

"use_dbus", "use_ipv6", "debuglevel", "restore",

2029

"statedir"):

1476

2030

value = getattr(options, option)

1477

2031

if value is not None:

1478

2032

server_settings[option] = value

1486

2040

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

1487

2041

1488

2042

# For convenience

1489

debug = server_settings[u"debug"]

1490

use_dbus = server_settings[u"use_dbus"]

1491

use_ipv6 = server_settings[u"use_ipv6"]

1492

1493

if not debug:

1494

syslogger.setLevel(logging.WARNING)

1495

console.setLevel(logging.WARNING)

1496

1497

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

2043

debug = server_settings["debug"]

2044

debuglevel = server_settings["debuglevel"]

2045

use_dbus = server_settings["use_dbus"]

2046

use_ipv6 = server_settings["use_ipv6"]

2047

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

2048

stored_state_file)

2049

2050

if debug:

2051

initlogger(logging.DEBUG)

2052

else:

2053

if not debuglevel:

2054

initlogger()

2055

else:

2056

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

2057

initlogger(level)

2058

2059

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

1498

2060

syslogger.setFormatter(logging.Formatter

1499

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

1500

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

1501

% server_settings[u"servicename"]))

2061

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

2062

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

2063

% server_settings["servicename"]))

1502

2064

1503

2065

# Parse config file with clients

1504

client_defaults = { u"timeout": u"1h",

1505

u"interval": u"5m",

1506

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

1507

u"host": u"",

2066

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

2067

"extended_timeout": "15m",

2068

"interval": "2m",

2069

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

2070

"host": "",

2071

"approval_delay": "0s",

2072

"approval_duration": "1s",

1508

2073

}

1509

2074

client_config = configparser.SafeConfigParser(client_defaults)

1510

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

1511

u"clients.conf"))

2075

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

2076

"clients.conf"))

1512

2077

1513

2078

global mandos_dbus_service

1514

2079

mandos_dbus_service = None

1515

2080

1516

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

1517

server_settings[u"port"]),

2081

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

2082

server_settings["port"]),

1518

2083

ClientHandler,

1519

interface=server_settings[u"interface"],

2084

interface=(server_settings["interface"]

2085

or None),

1520

2086

use_ipv6=use_ipv6,

1521

2087

gnutls_priority=

1522

server_settings[u"priority"],

2088

server_settings["priority"],

1523

2089

use_dbus=use_dbus)

1524

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

1525

try:

1526

pidfile = open(pidfilename, u"w")

1527

except IOError:

1528

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

2090

if not debug:

2091

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

2092

try:

2093

pidfile = open(pidfilename, "w")

2094

except IOError:

2095

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

1529

2096

1530

2097

try:

1531

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

1532

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

2098

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

2099

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

1533

2100

except KeyError:

1534

2101

try:

1535

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

1536

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

2102

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

2103

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

1537

2104

except KeyError:

1538

2105

try:

1539

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

1540

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

2106

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

2107

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

1541

2108

except KeyError:

1542

2109

uid = 65534

1543

2110

gid = 65534

1544

2111

try:

1545

2112

os.setgid(gid)

1546

2113

os.setuid(uid)

1547

except OSError, error:

2114

except OSError as error:

1548

2115

if error[0] != errno.EPERM:

1549

2116

raise error

1550

2117

1551

# Enable all possible GnuTLS debugging

1552

2118

if debug:

2119

# Enable all possible GnuTLS debugging

2120

1553

2121

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

1554

2122

# - GnuTLS manual

1555

2123

gnutls.library.functions.gnutls_global_set_log_level(11)

1556

2124

1557

2125

@gnutls.library.types.gnutls_log_func

1558

2126

def debug_gnutls(level, string):

1559

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

2127

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

1560

2128

1561

2129

(gnutls.library.functions

1562

2130

.gnutls_global_set_log_function(debug_gnutls))

2131

2132

# Redirect stdin so all checkers get /dev/null

2133

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

2134

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

2135

if null > 2:

2136

os.close(null)

2137

else:

2138

# No console logging

2139

logger.removeHandler(console)

2140

2141

# Need to fork before connecting to D-Bus

2142

if not debug:

2143

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

2144

daemon()

1563

2145

1564

2146

global main_loop

1565

2147

# From the Avahi example code

1569

2151

# End of Avahi example code

1570

2152

if use_dbus:

1571

2153

try:

1572

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

2154

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

1573

2155

bus, do_not_queue=True)

1574

except dbus.exceptions.NameExistsException, e:

1575

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

2156

old_bus_name = (dbus.service.BusName

2157

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

2158

do_not_queue=True))

2159

except dbus.exceptions.NameExistsException as e:

2160

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

1576

2161

use_dbus = False

1577

server_settings[u"use_dbus"] = False

2162

server_settings["use_dbus"] = False

1578

2163

tcp_server.use_dbus = False

1579

2164

protocol = avahi.PROTO_INET6 if use_ipv6 else avahi.PROTO_INET

1580

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

1581

servicetype = u"_mandos._tcp",

1582

protocol = protocol, bus = bus)

2165

service = AvahiServiceToSyslog(name =

2166

server_settings["servicename"],

2167

servicetype = "_mandos._tcp",

2168

protocol = protocol, bus = bus)

1583

2169

if server_settings["interface"]:

1584

2170

service.interface = (if_nametoindex

1585

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

2171

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

2172

2173

global multiprocessing_manager

2174

multiprocessing_manager = multiprocessing.Manager()

1586

2175

1587

2176

client_class = Client

1588

2177

if use_dbus:

1589

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

1590

tcp_server.clients.update(set(

1591

client_class(name = section,

1592

config= dict(client_config.items(section)))

1593

for section in client_config.sections()))

2178

client_class = functools.partial(ClientDBusTransitional,

2179

bus = bus)

2180

2181

special_settings = {

2182

# Some settings need to be accessd by special methods;

2183

# booleans need .getboolean(), etc. Here is a list of them:

2184

"approved_by_default":

2185

lambda section:

2186

client_config.getboolean(section, "approved_by_default"),

2187

"enabled":

2188

lambda section:

2189

client_config.getboolean(section, "enabled"),

2190

}

2191

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

2192

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

2193

# with exceptions for any special settings as defined above

2194

client_settings = dict((clientname,

2195

dict((setting,

2196

(value

2197

if setting not in special_settings

2198

else special_settings[setting]

2199

(clientname)))

2200

for setting, value in

2201

client_config.items(clientname)))

2202

for clientname in client_config.sections())

2203

2204

old_client_settings = {}

2205

clients_data = []

2206

2207

# Get client data and settings from last running state.

2208

if server_settings["restore"]:

2209

try:

2210

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

2211

clients_data, old_client_settings = (pickle.load

2212

(stored_state))

2213

os.remove(stored_state_path)

2214

except IOError as e:

2215

logger.warning("Could not load persistent state: {0}"

2216

.format(e))

2217

if e.errno != errno.ENOENT:

2218

raise

2219

2220

with Crypto() as crypt:

2221

for client in clients_data:

2222

client_name = client["name"]

2223

2224

# Decide which value to use after restoring saved state.

2225

# We have three different values: Old config file,

2226

# new config file, and saved state.

2227

# New config value takes precedence if it differs from old

2228

# config value, otherwise use saved state.

2229

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

2230

try:

2231

# For each value in new config, check if it

2232

# differs from the old config value (Except for

2233

# the "secret" attribute)

2234

if (name != "secret" and

2235

value != old_client_settings[client_name]

2236

[name]):

2237

setattr(client, name, value)

2238

except KeyError:

2239

pass

2240

2241

# Clients who has passed its expire date can still be

2242

# enabled if its last checker was sucessful. Clients

2243

# whose checker failed before we stored its state is

2244

# assumed to have failed all checkers during downtime.

2245

if client["enabled"] and client["last_checked_ok"]:

2246

if ((datetime.datetime.utcnow()

2247

- client["last_checked_ok"])

2248

> client["interval"]):

2249

if client["last_checker_status"] != 0:

2250

client["enabled"] = False

2251

else:

2252

client["expires"] = (datetime.datetime

2253

.utcnow()

2254

+ client["timeout"])

2255

2256

client["changedstate"] = (multiprocessing_manager

2257

.Condition

2258

(multiprocessing_manager

2259

.Lock()))

2260

if use_dbus:

2261

new_client = (ClientDBusTransitional.__new__

2262

(ClientDBusTransitional))

2263

tcp_server.clients[client_name] = new_client

2264

new_client.bus = bus

2265

for name, value in client.iteritems():

2266

setattr(new_client, name, value)

2267

client_object_name = unicode(client_name).translate(

2268

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

2269

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

2270

new_client.dbus_object_path = (dbus.ObjectPath

2271

("/clients/"

2272

+ client_object_name))

2273

DBusObjectWithProperties.__init__(new_client,

2274

new_client.bus,

2275

new_client

2276

.dbus_object_path)

2277

else:

2278

tcp_server.clients[client_name] = (Client.__new__

2279

(Client))

2280

for name, value in client.iteritems():

2281

setattr(tcp_server.clients[client_name],

2282

name, value)

2283

2284

try:

2285

tcp_server.clients[client_name].secret = (

2286

crypt.decrypt(tcp_server.clients[client_name]

2287

.encrypted_secret,

2288

client_settings[client_name]

2289

["secret"]))

2290

except CryptoError:

2291

# If decryption fails, we use secret from new settings

2292

tcp_server.clients[client_name].secret = (

2293

client_settings[client_name]["secret"])

2294

2295

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

2296

for clientname in set(old_client_settings) - set(client_settings):

2297

del tcp_server.clients[clientname]

2298

for clientname in set(client_settings) - set(old_client_settings):

2299

tcp_server.clients[clientname] = (client_class(name

2300

= clientname,

2301

config =

2302

client_settings

2303

[clientname]))

2304

1594

2305

if not tcp_server.clients:

1595

logger.warning(u"No clients defined")

1596

1597

if debug:

1598

# Redirect stdin so all checkers get /dev/null

1599

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

1600

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

1601

if null > 2:

1602

os.close(null)

1603

else:

1604

# No console logging

1605

logger.removeHandler(console)

1606

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

1607

daemon()

1608

1609

try:

1610

with closing(pidfile):

1611

pid = os.getpid()

1612

pidfile.write(str(pid) + "\n")

1613

del pidfile

1614

except IOError:

1615

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

1616

pidfilename, pid)

1617

except NameError:

1618

# "pidfile" was never created

1619

pass

1620

del pidfilename

1621

2306

logger.warning("No clients defined")

2307

1622

2308

if not debug:

2309

try:

2310

with pidfile:

2311

pid = os.getpid()

2312

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

2313

del pidfile

2314

except IOError:

2315

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

2316

pidfilename, pid)

2317

except NameError:

2318

# "pidfile" was never created

2319

pass

2320

del pidfilename

2321

1623

2322

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

2323

1624

2324

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

1625

2325

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

1626

2326

1628

2328

class MandosDBusService(dbus.service.Object):

1629

2329

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

1630

2330

def __init__(self):

1631

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

1632

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

2331

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

2332

_interface = "se.recompile.Mandos"

1633

2333

1634

@dbus.service.signal(_interface, signature=u"oa{sv}")

1635

def ClientAdded(self, objpath, properties):

2334

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

2335

def ClientAdded(self, objpath):

1636

2336

"D-Bus signal"

1637

2337

pass

1638

2338

1639

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

2339

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

1640

2340

def ClientNotFound(self, fingerprint, address):

1641

2341

"D-Bus signal"

1642

2342

pass

1643

2343

1644

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

2344

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

1645

2345

def ClientRemoved(self, objpath, name):

1646

2346

"D-Bus signal"

1647

2347

pass

1648

2348

1649

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

2349

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

1650

2350

def GetAllClients(self):

1651

2351

"D-Bus method"

1652

2352

return dbus.Array(c.dbus_object_path

1653

for c in tcp_server.clients)

2353

for c in

2354

tcp_server.clients.itervalues())

1654

2355

1655

2356

@dbus.service.method(_interface,

1656

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

2357

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

1657

2358

def GetAllClientsWithProperties(self):

1658

2359

"D-Bus method"

1659

2360

return dbus.Dictionary(

1660

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

1661

for c in tcp_server.clients),

1662

signature=u"oa{sv}")

2361

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

2362

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

2363

signature="oa{sv}")

1663

2364

1664

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

2365

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

1665

2366

def RemoveClient(self, object_path):

1666

2367

"D-Bus method"

1667

for c in tcp_server.clients:

2368

for c in tcp_server.clients.itervalues():

1668

2369

if c.dbus_object_path == object_path:

1669

tcp_server.clients.remove(c)

2370

del tcp_server.clients[c.name]

1670

2371

c.remove_from_connection()

1671

2372

# Don't signal anything except ClientRemoved

1672

2373

c.disable(quiet=True)

1677

2378

1678

2379

del _interface

1679

2380

1680

mandos_dbus_service = MandosDBusService()

2381

class MandosDBusServiceTransitional(MandosDBusService):

2382

__metaclass__ = AlternateDBusNamesMetaclass

2383

mandos_dbus_service = MandosDBusServiceTransitional()

1681

2384

1682

2385

def cleanup():

1683

2386

"Cleanup function; run on exit"

1684

2387

service.cleanup()

1685

2388

2389

multiprocessing.active_children()

2390

if not (tcp_server.clients or client_settings):

2391

return

2392

2393

# Store client before exiting. Secrets are encrypted with key

2394

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

2395

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

2396

clients = []

2397

with Crypto() as crypt:

2398

for client in tcp_server.clients.itervalues():

2399

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

2400

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

2401

key)

2402

client_dict = {}

2403

2404

# A list of attributes that will not be stored when

2405

# shutting down.

2406

exclude = set(("bus", "changedstate", "secret"))

2407

for name, typ in (inspect.getmembers

2408

(dbus.service.Object)):

2409

exclude.add(name)

2410

2411

client_dict["encrypted_secret"] = (client

2412

.encrypted_secret)

2413

for attr in client.client_structure:

2414

if attr not in exclude:

2415

client_dict[attr] = getattr(client, attr)

2416

2417

clients.append(client_dict)

2418

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

2419

2420

try:

2421

with os.fdopen(os.open(stored_state_path,

2422

os.O_CREAT|os.O_WRONLY|os.O_TRUNC,

2423

0600), "wb") as stored_state:

2424

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

2425

except (IOError, OSError) as e:

2426

logger.warning("Could not save persistent state: {0}"

2427

.format(e))

2428

if e.errno not in (errno.ENOENT, errno.EACCES):

2429

raise

2430

2431

# Delete all clients, and settings from config

1686

2432

while tcp_server.clients:

1687

client = tcp_server.clients.pop()

2433

name, client = tcp_server.clients.popitem()

1688

2434

if use_dbus:

1689

2435

client.remove_from_connection()

1690

client.disable_hook = None

1691

2436

# Don't signal anything except ClientRemoved

1692

2437

client.disable(quiet=True)

1693

2438

if use_dbus:

1694

2439

# Emit D-Bus signal

1695

mandos_dbus_service.ClientRemoved(client.dbus_object_path,

2440

mandos_dbus_service.ClientRemoved(client

2441

.dbus_object_path,

1696

2442

client.name)

2443

client_settings.clear()

1697

2444

1698

2445

atexit.register(cleanup)

1699

2446

1700

for client in tcp_server.clients:

2447

for client in tcp_server.clients.itervalues():

1701

2448

if use_dbus:

1702

2449

# Emit D-Bus signal

1703

mandos_dbus_service.ClientAdded(client.dbus_object_path,

1704

client.GetAll(u""))

1705

client.enable()

2450

mandos_dbus_service.ClientAdded(client.dbus_object_path)

2451

# Need to initiate checking of clients

2452

if client.enabled:

2453

client.init_checker()

1706

2454

1707

2455

tcp_server.enable()

1708

2456

tcp_server.server_activate()

1710

2458

# Find out what port we got

1711

2459

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

1712

2460

if use_ipv6:

1713

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

2461

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

1714

2462

" flowinfo %d, scope_id %d"

1715

2463

% tcp_server.socket.getsockname())

1716

2464

else: # IPv4

1717

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

2465

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

1718

2466

% tcp_server.socket.getsockname())

1719

2467

1720

2468

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

1723

2471

# From the Avahi example code

1724

2472

try:

1725

2473

service.activate()

1726

except dbus.exceptions.DBusException, error:

1727

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

2474

except dbus.exceptions.DBusException as error:

2475

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

1728

2476

cleanup()

1729

2477

sys.exit(1)

1730

2478

# End of Avahi example code

1734

2482

(tcp_server.handle_request

1735

2483

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

1736

2484

1737

logger.debug(u"Starting main loop")

2485

logger.debug("Starting main loop")

1738

2486

main_loop.run()

1739

except AvahiError, error:

1740

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

2487

except AvahiError as error:

2488

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

1741

2489

cleanup()

1742

2490

sys.exit(1)

1743

2491

except KeyboardInterrupt:

1744

2492

if debug:

1745

print >> sys.stderr

1746

logger.debug(u"Server received KeyboardInterrupt")

1747

logger.debug(u"Server exiting")

2493

print("", file=sys.stderr)

2494

logger.debug("Server received KeyboardInterrupt")

2495

logger.debug("Server exiting")

1748

2496

# Must run before the D-Bus bus name gets deregistered

1749

2497

cleanup()

1750

2498

2499

1751

2500

if __name__ == '__main__':

1752

2501

main()