/mandos/trunk : revision 24.2.1

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

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#

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# Everything else is

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#

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

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

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# along with this program. If not, see

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

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#

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

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

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#

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from __future__ import (division, absolute_import, print_function,

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unicode_literals)

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from __future__ import division, with_statement, absolute_import

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import SocketServer as socketserver

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import socket

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import argparse

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import optparse

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import datetime

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import errno

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import gnutls.crypto

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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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except ImportError:

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SO_BINDTODEVICE = None

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version = "1.5.0"

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stored_state_file = "clients.pickle"

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logger = logging.getLogger()

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version = "1.0.14"

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logger = logging.Logger(u'mandos')

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syslogger = (logging.handlers.SysLogHandler

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(facility = logging.handlers.SysLogHandler.LOG_DAEMON,

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

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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(debug, 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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if debug:

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console = logging.StreamHandler()

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console.setFormatter(logging.Formatter('%(asctime)s %(name)s'

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' [%(process)d]:'

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' %(levelname)s:'

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' %(message)s'))

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logger.addHandler(console)

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logger.setLevel(level)

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class PGPError(Exception):

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

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pass

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class PGPEngine(object):

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

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def __init__(self):

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self.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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'--no-use-agent'])

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def __enter__(self):

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return self

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def __exit__ (self, exc_type, exc_value, traceback):

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self._cleanup()

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return False

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def __del__(self):

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self._cleanup()

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def _cleanup(self):

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if self.tempdir is not None:

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# Delete contents of tempdir

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for root, dirs, files in os.walk(self.tempdir,

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topdown = False):

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for filename in files:

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os.remove(os.path.join(root, filename))

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for dirname in dirs:

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

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# Remove tempdir

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os.rmdir(self.tempdir)

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self.tempdir = None

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def password_encode(self, password):

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# Passphrase can not be empty and can not contain newlines or

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# NUL bytes. So we prefix it and hex encode it.

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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 PGPError(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 PGPError(e)

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self.gnupg.passphrase = None

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return decrypted_plaintext

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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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multiprocessing_manager = multiprocessing.Manager()

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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: '_mandos._tcp'.

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type: string; Example: u'_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 = "", host = "", max_renames = 32768,

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domain = u"", host = u"", 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("No suitable Zeroconf service name found"

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" after %i retries, exiting.",

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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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self.rename_count)

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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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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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self.remove()

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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.add()

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

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

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if state == avahi.ENTRY_GROUP_ESTABLISHED:

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logger.debug("Zeroconf service established.")

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

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elif state == avahi.ENTRY_GROUP_COLLISION:

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

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

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

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unicode(error))

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raise AvahiGroupError("State changed: %s"

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raise AvahiGroupError(u"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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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.Free()

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self.group = None

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self.remove()

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

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def server_state_changed(self, state):

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

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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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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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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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follow_name_owner_changes=True),

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avahi.DBUS_PATH_SERVER),

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avahi.DBUS_INTERFACE_SERVER)

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self.server.connect_to_signal("StateChanged",

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self.server.connect_to_signal(u"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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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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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 disabled

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

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

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

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"""

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

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"extended_timeout": "15m",

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"interval": "2m",

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

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"host": "",

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"approval_delay": "0s",

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"approval_duration": "1s",

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"approved_by_default": "True",

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"enabled": "True",

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}

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@staticmethod

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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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def timeout_milliseconds(self):

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"Return the 'timeout' attribute in milliseconds"

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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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return self._timedelta_to_milliseconds(self.timeout)

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def interval_milliseconds(self):

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"Return the 'interval' attribute in milliseconds"

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return timedelta_to_milliseconds(self.interval)

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return self._timedelta_to_milliseconds(self.interval)

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def approved_delay_milliseconds(self):

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return self._timedelta_to_milliseconds(self.approved_delay)

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def approval_delay_milliseconds(self):

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return timedelta_to_milliseconds(self.approval_delay)

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@staticmethod

462

def config_parser(config):

463

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

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

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with exceptions for any special settings as defined above.

466

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

467

value given the same arguments.

468

"""

469

settings = {}

470

for client_name in config.sections():

471

section = dict(config.items(client_name))

472

client = settings[client_name] = {}

473

474

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

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# Reformat values from string types to Python types

476

client["approved_by_default"] = config.getboolean(

477

client_name, "approved_by_default")

478

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

479

"enabled")

480

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

482

.replace(" ", ""))

483

if "secret" in section:

484

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

485

elif "secfile" in section:

486

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

487

(section["secfile"])),

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"rb") as secfile:

489

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

490

else:

491

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

492

% section)

493

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

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client["extended_timeout"] = string_to_delta(

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section["extended_timeout"])

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

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client["approval_delay"] = string_to_delta(

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section["approval_delay"])

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client["approval_duration"] = string_to_delta(

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section["approval_duration"])

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

502

client["last_approval_request"] = None

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client["last_checked_ok"] = None

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client["last_checker_status"] = None

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return settings

507

508

509

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

286

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

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

511

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

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attribute."""

513

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self.name = name

514

# adding all client settings

515

for setting, value in settings.iteritems():

516

setattr(self, setting, value)

517

518

if self.enabled:

519

if not hasattr(self, "last_enabled"):

520

self.last_enabled = datetime.datetime.utcnow()

521

if not hasattr(self, "expires"):

522

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

523

+ self.timeout)

524

else:

525

self.last_enabled = None

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self.expires = None

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

291

if config is None:

292

config = {}

293

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

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# Uppercase and remove spaces from fingerprint for later

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# comparison purposes with return value from the fingerprint()

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# function

532

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

533

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

534

datetime.datetime.utcnow())

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# attributes specific for this server instance

297

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

298

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

299

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

300

if u"secret" in config:

301

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

302

elif u"secfile" in config:

303

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

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(config[u"secfile"])),

305

"rb") as secfile:

306

self.secret = secfile.read()

307

else:

308

#XXX Need to allow secret on demand!

309

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

310

% self.name)

311

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

312

self.created = datetime.datetime.utcnow()

313

self.enabled = False

314

self.last_enabled = None

315

self.last_checked_ok = None

316

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

317

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

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self.disable_hook = disable_hook

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self.checker = None

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self.checker_initiator_tag = None

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self.disable_initiator_tag = None

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self.checker_callback_tag = None

323

self.checker_command = config[u"checker"]

541

324

self.current_checker_command = None

542

self.approved = None

325

self.last_connect = None

543

326

self.approvals_pending = 0

544

self.changedstate = (multiprocessing_manager

545

.Condition(multiprocessing_manager

546

.Lock()))

547

self.client_structure = [attr for attr in

548

self.__dict__.iterkeys()

549

if not attr.startswith("_")]

550

self.client_structure.append("client_structure")

551

552

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

553

lambda obj:

554

isinstance(obj,

555

property)):

556

if not name.startswith("_"):

557

self.client_structure.append(name)

558

559

# Send notice to process children that client state has changed

327

self._approved = None

328

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

329

True)

330

self.approved_delay = string_to_delta(

331

config[u"approved_delay"])

332

self.approved_duration = string_to_delta(

333

config[u"approved_duration"])

334

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

335

560

336

def send_changedstate(self):

561

with self.changedstate:

562

self.changedstate.notify_all()

563

337

self.changedstate.acquire()

338

self.changedstate.notify_all()

339

self.changedstate.release()

340

564

341

def enable(self):

565

342

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

566

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

343

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

567

344

# Already enabled

568

345

return

569

346

self.send_changedstate()

570

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

571

self.enabled = True

572

347

self.last_enabled = datetime.datetime.utcnow()

573

self.init_checker()

574

575

def disable(self, quiet=True):

576

"""Disable this client."""

577

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

578

return False

579

if not quiet:

580

self.send_changedstate()

581

if not quiet:

582

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

583

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

584

gobject.source_remove(self.disable_initiator_tag)

585

self.disable_initiator_tag = None

586

self.expires = None

587

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

588

gobject.source_remove(self.checker_initiator_tag)

589

self.checker_initiator_tag = None

590

self.stop_checker()

591

self.enabled = False

592

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

593

return False

594

595

def __del__(self):

596

self.disable()

597

598

def init_checker(self):

599

348

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

600

349

# and every interval from then on.

601

350

self.checker_initiator_tag = (gobject.timeout_add

605

354

self.disable_initiator_tag = (gobject.timeout_add

606

355

(self.timeout_milliseconds(),

607

356

self.disable))

357

self.enabled = True

608

358

# Also start a new checker *right now*.

609

359

self.start_checker()

610

360

361

def disable(self, quiet=True):

362

"""Disable this client."""

363

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

364

return False

365

if not quiet:

366

self.send_changedstate()

367

if not quiet:

368

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

369

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

370

gobject.source_remove(self.disable_initiator_tag)

371

self.disable_initiator_tag = None

372

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

373

gobject.source_remove(self.checker_initiator_tag)

374

self.checker_initiator_tag = None

375

self.stop_checker()

376

if self.disable_hook:

377

self.disable_hook(self)

378

self.enabled = False

379

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

380

return False

381

382

def __del__(self):

383

self.disable_hook = None

384

self.disable()

385

611

386

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

612

387

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

613

388

self.checker_callback_tag = None

614

389

self.checker = None

615

390

if os.WIFEXITED(condition):

616

self.last_checker_status = os.WEXITSTATUS(condition)

617

if self.last_checker_status == 0:

618

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

391

exitstatus = os.WEXITSTATUS(condition)

392

if exitstatus == 0:

393

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

619

394

vars(self))

620

395

self.checked_ok()

621

396

else:

622

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

397

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

623

398

vars(self))

624

399

else:

625

self.last_checker_status = -1

626

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

400

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

627

401

vars(self))

628

402

629

def checked_ok(self, timeout=None):

403

def checked_ok(self):

630

404

"""Bump up the timeout for this client.

631

405

632

406

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

633

407

alive and well.

634

408

"""

635

if timeout is None:

636

timeout = self.timeout

637

409

self.last_checked_ok = datetime.datetime.utcnow()

638

if self.disable_initiator_tag is not None:

639

gobject.source_remove(self.disable_initiator_tag)

640

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

641

self.disable_initiator_tag = (gobject.timeout_add

642

(timedelta_to_milliseconds

643

(timeout), self.disable))

644

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

645

646

def need_approval(self):

647

self.last_approval_request = datetime.datetime.utcnow()

410

gobject.source_remove(self.disable_initiator_tag)

411

self.disable_initiator_tag = (gobject.timeout_add

412

(self.timeout_milliseconds(),

413

self.disable))

648

414

649

415

def start_checker(self):

650

416

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

663

429

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

664

430

try:

665

431

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

666

except (AttributeError, OSError) as error:

432

except (AttributeError, OSError), error:

667

433

if (isinstance(error, OSError)

668

434

and error.errno != errno.ECHILD):

669

435

raise error

670

436

else:

671

437

if pid:

672

logger.warning("Checker was a zombie")

438

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

673

439

gobject.source_remove(self.checker_callback_tag)

674

440

self.checker_callback(pid, status,

675

441

self.current_checker_command)

680

446

command = self.checker_command % self.host

681

447

except TypeError:

682

448

# Escape attributes for the shell

683

escaped_attrs = dict(

684

(attr,

685

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

686

errors=

687

'replace')))

688

for attr in

689

self.runtime_expansions)

690

449

escaped_attrs = dict((key,

450

re.escape(unicode(str(val),

451

errors=

452

u'replace')))

453

for key, val in

454

vars(self).iteritems())

691

455

try:

692

456

command = self.checker_command % escaped_attrs

693

except TypeError as error:

694

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

695

' %s', self.checker_command, error)

457

except TypeError, error:

458

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

459

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

696

460

return True # Try again later

697

461

self.current_checker_command = command

698

462

try:

699

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

463

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

700

464

command, self.name)

701

465

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

702

466

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

704

468

# always replaced by /dev/null.)

705

469

self.checker = subprocess.Popen(command,

706

470

close_fds=True,

707

shell=True, cwd="/")

471

shell=True, cwd=u"/")

708

472

self.checker_callback_tag = (gobject.child_watch_add

709

473

(self.checker.pid,

710

474

self.checker_callback,

715

479

if pid:

716

480

gobject.source_remove(self.checker_callback_tag)

717

481

self.checker_callback(pid, status, command)

718

except OSError as error:

719

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

482

except OSError, error:

483

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

720

484

error)

721

485

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

722

486

return True

726

490

if self.checker_callback_tag:

727

491

gobject.source_remove(self.checker_callback_tag)

728

492

self.checker_callback_tag = None

729

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

493

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

730

494

return

731

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

495

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

732

496

try:

733

497

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

734

498

#time.sleep(0.5)

735

499

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

736

500

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

737

except OSError as error:

501

except OSError, error:

738

502

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

739

503

raise

740

504

self.checker = None

741

505

742

743

def dbus_service_property(dbus_interface, signature="v",

744

access="readwrite", byte_arrays=False):

506

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

507

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

745

508

"""Decorators for marking methods of a DBusObjectWithProperties to

746

509

become properties on the D-Bus.

747

510

754

517

"""

755

518

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

756

519

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

757

if byte_arrays and signature != "ay":

758

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

759

" signature %r" % signature)

520

if byte_arrays and signature != u"ay":

521

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

522

u" signature %r" % signature)

760

523

def decorator(func):

761

524

func._dbus_is_property = True

762

525

func._dbus_interface = dbus_interface

763

526

func._dbus_signature = signature

764

527

func._dbus_access = access

765

528

func._dbus_name = func.__name__

766

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

529

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

767

530

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

768

func._dbus_get_args_options = {'byte_arrays': byte_arrays }

531

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

769

532

return func

770

533

return decorator

771

534

791

554

792

555

class DBusObjectWithProperties(dbus.service.Object):

793

556

"""A D-Bus object with properties.

794

557

795

558

Classes inheriting from this can use the dbus_service_property

796

559

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

797

560

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

799

562

800

563

@staticmethod

801

564

def _is_dbus_property(obj):

802

return getattr(obj, "_dbus_is_property", False)

565

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

803

566

804

567

def _get_all_dbus_properties(self):

805

568

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

806

569

"""

807

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

808

for cls in self.__class__.__mro__

570

return ((prop._dbus_name, prop)

809

571

for name, prop in

810

inspect.getmembers(cls, self._is_dbus_property))

572

inspect.getmembers(self, self._is_dbus_property))

811

573

812

574

def _get_dbus_property(self, interface_name, property_name):

813

575

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

814

576

property with the specified name and interface.

815

577

"""

816

for cls in self.__class__.__mro__:

817

for name, value in (inspect.getmembers

818

(cls, self._is_dbus_property)):

819

if (value._dbus_name == property_name

820

and value._dbus_interface == interface_name):

821

return value.__get__(self)

822

578

for name in (property_name,

579

property_name + u"_dbus_property"):

580

prop = getattr(self, name, None)

581

if (prop is None

582

or not self._is_dbus_property(prop)

583

or prop._dbus_name != property_name

584

or (interface_name and prop._dbus_interface

585

and interface_name != prop._dbus_interface)):

586

continue

587

return prop

823

588

# No such property

824

raise DBusPropertyNotFound(self.dbus_object_path + ":"

825

+ interface_name + "."

589

raise DBusPropertyNotFound(self.dbus_object_path + u":"

590

+ interface_name + u"."

826

591

+ property_name)

827

592

828

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

829

out_signature="v")

593

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

594

out_signature=u"v")

830

595

def Get(self, interface_name, property_name):

831

596

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

832

597

"""

833

598

prop = self._get_dbus_property(interface_name, property_name)

834

if prop._dbus_access == "write":

599

if prop._dbus_access == u"write":

835

600

raise DBusPropertyAccessException(property_name)

836

601

value = prop()

837

if not hasattr(value, "variant_level"):

602

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

838

603

return value

839

604

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

840

605

841

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

606

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

842

607

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

843

608

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

844

609

"""

845

610

prop = self._get_dbus_property(interface_name, property_name)

846

if prop._dbus_access == "read":

611

if prop._dbus_access == u"read":

847

612

raise DBusPropertyAccessException(property_name)

848

if prop._dbus_get_args_options["byte_arrays"]:

613

if prop._dbus_get_args_options[u"byte_arrays"]:

849

614

# The byte_arrays option is not supported yet on

850

615

# signatures other than "ay".

851

if prop._dbus_signature != "ay":

616

if prop._dbus_signature != u"ay":

852

617

raise ValueError

853

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

854

for byte in value))

618

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

619

for byte in value))

855

620

prop(value)

856

621

857

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

858

out_signature="a{sv}")

622

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

623

out_signature=u"a{sv}")

859

624

def GetAll(self, interface_name):

860

625

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

861

626

standard.

862

627

863

628

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

864

629

"""

865

properties = {}

630

all = {}

866

631

for name, prop in self._get_all_dbus_properties():

867

632

if (interface_name

868

633

and interface_name != prop._dbus_interface):

869

634

# Interface non-empty but did not match

870

635

continue

871

636

# Ignore write-only properties

872

if prop._dbus_access == "write":

637

if prop._dbus_access == u"write":

873

638

continue

874

639

value = prop()

875

if not hasattr(value, "variant_level"):

876

properties[name] = value

640

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

641

all[name] = value

877

642

continue

878

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

879

value.variant_level+1)

880

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

643

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

644

value.variant_level+1)

645

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

881

646

882

647

@dbus.service.method(dbus.INTROSPECTABLE_IFACE,

883

out_signature="s",

648

out_signature=u"s",

884

649

path_keyword='object_path',

885

650

connection_keyword='connection')

886

651

def Introspect(self, object_path, connection):

891

656

try:

892

657

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

893

658

def make_tag(document, name, prop):

894

e = document.createElement("property")

895

e.setAttribute("name", name)

896

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

897

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

659

e = document.createElement(u"property")

660

e.setAttribute(u"name", name)

661

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

662

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

898

663

return e

899

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

664

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

900

665

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

901

666

for name, prop

902

667

in self._get_all_dbus_properties()

903

668

if prop._dbus_interface

904

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

669

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

905

670

if_tag.appendChild(tag)

906

671

# Add the names to the return values for the

907

672

# "org.freedesktop.DBus.Properties" methods

908

if (if_tag.getAttribute("name")

909

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

910

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

911

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

912

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

913

if (arg.getAttribute("direction")

914

== "out"):

915

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

916

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

917

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

918

if (arg.getAttribute("direction")

919

== "out"):

920

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

921

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

673

if (if_tag.getAttribute(u"name")

674

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

675

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

676

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

677

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

678

if (arg.getAttribute(u"direction")

679

== u"out"):

680

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

681

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

682

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

683

if (arg.getAttribute(u"direction")

684

== u"out"):

685

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

686

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

922

687

document.unlink()

923

688

except (AttributeError, xml.dom.DOMException,

924

xml.parsers.expat.ExpatError) as error:

925

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

689

xml.parsers.expat.ExpatError), error:

690

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

926

691

error)

927

692

return xmlstring

928

693

929

694

930

def datetime_to_dbus (dt, variant_level=0):

931

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

932

if dt is None:

933

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

934

return dbus.String(dt.isoformat(),

935

variant_level=variant_level)

936

937

938

class AlternateDBusNamesMetaclass(DBusObjectWithProperties

939

.__metaclass__):

940

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

941

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

942

"""

943

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

944

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

945

# methods, signals, or properties in them

946

for base in (b for b in bases

947

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

948

# Go though all attributes of the base class

949

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

950

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

951

# with the wrong interface name

952

if (not hasattr(attribute, "_dbus_interface")

953

or not attribute._dbus_interface

954

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

955

continue

956

# Create an alternate D-Bus interface name based on

957

# the current name

958

alt_interface = (attribute._dbus_interface

959

.replace("se.recompile.Mandos",

960

"se.bsnet.fukt.Mandos"))

961

# Is this a D-Bus signal?

962

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

963

# Extract the original non-method function by

964

# black magic

965

nonmethod_func = (dict(

966

zip(attribute.func_code.co_freevars,

967

attribute.__closure__))["func"]

968

.cell_contents)

969

# Create a new, but exactly alike, function

970

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

971

# with the alternate D-Bus interface name

972

new_function = (dbus.service.signal

973

(alt_interface,

974

attribute._dbus_signature)

975

(types.FunctionType(

976

nonmethod_func.func_code,

977

nonmethod_func.func_globals,

978

nonmethod_func.func_name,

979

nonmethod_func.func_defaults,

980

nonmethod_func.func_closure)))

981

# Define a creator of a function to call both the

982

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

983

# signals gets sent when the function is called

984

def fixscope(func1, func2):

985

"""This function is a scope container to pass

986

func1 and func2 to the "call_both" function

987

outside of its arguments"""

988

def call_both(*args, **kwargs):

989

"""This function will emit two D-Bus

990

signals by calling func1 and func2"""

991

func1(*args, **kwargs)

992

func2(*args, **kwargs)

993

return call_both

994

# Create the "call_both" function and add it to

995

# the class

996

attr[attrname] = fixscope(attribute,

997

new_function)

998

# Is this a D-Bus method?

999

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

1000

# Create a new, but exactly alike, function

1001

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

1002

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

1003

# to the class.

1004

attr[attrname] = (dbus.service.method

1005

(alt_interface,

1006

attribute._dbus_in_signature,

1007

attribute._dbus_out_signature)

1008

(types.FunctionType

1009

(attribute.func_code,

1010

attribute.func_globals,

1011

attribute.func_name,

1012

attribute.func_defaults,

1013

attribute.func_closure)))

1014

# Is this a D-Bus property?

1015

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

1016

# Create a new, but exactly alike, function

1017

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

1018

# property with the alternate D-Bus interface

1019

# name. Add it to the class.

1020

attr[attrname] = (dbus_service_property

1021

(alt_interface,

1022

attribute._dbus_signature,

1023

attribute._dbus_access,

1024

attribute

1025

._dbus_get_args_options

1026

["byte_arrays"])

1027

(types.FunctionType

1028

(attribute.func_code,

1029

attribute.func_globals,

1030

attribute.func_name,

1031

attribute.func_defaults,

1032

attribute.func_closure)))

1033

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

1034

1035

1036

695

class ClientDBus(Client, DBusObjectWithProperties):

1037

696

"""A Client class using D-Bus

1038

697

1040

699

dbus_object_path: dbus.ObjectPath

1041

700

bus: dbus.SystemBus()

1042

701

"""

1043

1044

runtime_expansions = (Client.runtime_expansions

1045

+ ("dbus_object_path",))

1046

1047

702

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

1048

703

1049

704

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

1050

705

self.bus = bus

1051

706

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

1052

self._approvals_pending = 0

1053

1054

self._approvals_pending = 0

1055

707

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

1056

708

# the D-Bus

1057

client_object_name = unicode(self.name).translate(

1058

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

1059

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

1060

709

self.dbus_object_path = (dbus.ObjectPath

1061

("/clients/" + client_object_name))

710

(u"/clients/"

711

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

1062

712

DBusObjectWithProperties.__init__(self, self.bus,

1063

713

self.dbus_object_path)

1064

1065

def notifychangeproperty(transform_func,

1066

dbus_name, type_func=lambda x: x,

1067

variant_level=1):

1068

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

1069

its changes to DBus.

1070

1071

transform_fun: Function that takes a value and a variant_level

1072

and transforms it to a D-Bus type.

1073

dbus_name: D-Bus name of the variable

1074

type_func: Function that transform the value before sending it

1075

to the D-Bus. Default: no transform

1076

variant_level: D-Bus variant level. Default: 1

1077

"""

1078

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

1079

def setter(self, value):

1080

if hasattr(self, "dbus_object_path"):

1081

if (not hasattr(self, attrname) or

1082

type_func(getattr(self, attrname, None))

1083

!= type_func(value)):

1084

dbus_value = transform_func(type_func(value),

1085

variant_level

1086

=variant_level)

1087

self.PropertyChanged(dbus.String(dbus_name),

1088

dbus_value)

1089

setattr(self, attrname, value)

1090

1091

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

1092

1093

1094

expires = notifychangeproperty(datetime_to_dbus, "Expires")

1095

approvals_pending = notifychangeproperty(dbus.Boolean,

1096

"ApprovalPending",

1097

type_func = bool)

1098

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

1099

last_enabled = notifychangeproperty(datetime_to_dbus,

1100

"LastEnabled")

1101

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

1102

type_func = lambda checker:

1103

checker is not None)

1104

last_checked_ok = notifychangeproperty(datetime_to_dbus,

1105

"LastCheckedOK")

1106

last_approval_request = notifychangeproperty(

1107

datetime_to_dbus, "LastApprovalRequest")

1108

approved_by_default = notifychangeproperty(dbus.Boolean,

1109

"ApprovedByDefault")

1110

approval_delay = notifychangeproperty(dbus.UInt64,

1111

"ApprovalDelay",

1112

type_func =

1113

timedelta_to_milliseconds)

1114

approval_duration = notifychangeproperty(

1115

dbus.UInt64, "ApprovalDuration",

1116

type_func = timedelta_to_milliseconds)

1117

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

1118

timeout = notifychangeproperty(dbus.UInt64, "Timeout",

1119

type_func =

1120

timedelta_to_milliseconds)

1121

extended_timeout = notifychangeproperty(

1122

dbus.UInt64, "ExtendedTimeout",

1123

type_func = timedelta_to_milliseconds)

1124

interval = notifychangeproperty(dbus.UInt64,

1125

"Interval",

1126

type_func =

1127

timedelta_to_milliseconds)

1128

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

1129

1130

del notifychangeproperty

714

715

@staticmethod

716

def _datetime_to_dbus(dt, variant_level=0):

717

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

718

return dbus.String(dt.isoformat(),

719

variant_level=variant_level)

720

721

def enable(self):

722

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

723

r = Client.enable(self)

724

if oldstate != self.enabled:

725

# Emit D-Bus signals

726

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

727

dbus.Boolean(True, variant_level=1))

728

self.PropertyChanged(

729

dbus.String(u"last_enabled"),

730

self._datetime_to_dbus(self.last_enabled,

731

variant_level=1))

732

return r

733

734

def disable(self, quiet = False):

735

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

736

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

737

if not quiet and oldstate != self.enabled:

738

# Emit D-Bus signal

739

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

740

dbus.Boolean(False, variant_level=1))

741

return r

1131

742

1132

743

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

1133

744

try:

1134

745

self.remove_from_connection()

1135

746

except LookupError:

1136

747

pass

1137

if hasattr(DBusObjectWithProperties, "__del__"):

748

if hasattr(DBusObjectWithProperties, u"__del__"):

1138

749

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

1139

750

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

1140

751

1142

753

*args, **kwargs):

1143

754

self.checker_callback_tag = None

1144

755

self.checker = None

756

# Emit D-Bus signal

757

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

758

dbus.Boolean(False, variant_level=1))

1145

759

if os.WIFEXITED(condition):

1146

760

exitstatus = os.WEXITSTATUS(condition)

1147

761

# Emit D-Bus signal

1157

771

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

1158

772

*args, **kwargs)

1159

773

774

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

775

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

776

# Emit D-Bus signal

777

self.PropertyChanged(

778

dbus.String(u"last_checked_ok"),

779

(self._datetime_to_dbus(self.last_checked_ok,

780

variant_level=1)))

781

return r

782

1160

783

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

1161

784

old_checker = self.checker

1162

785

if self.checker is not None:

1169

792

and old_checker_pid != self.checker.pid):

1170

793

# Emit D-Bus signal

1171

794

self.CheckerStarted(self.current_checker_command)

795

self.PropertyChanged(

796

dbus.String(u"checker_running"),

797

dbus.Boolean(True, variant_level=1))

1172

798

return r

1173

799

800

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

801

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

802

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

803

if (old_checker is not None

804

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

805

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

806

dbus.Boolean(False, variant_level=1))

807

return r

808

1174

809

def _reset_approved(self):

1175

self.approved = None

810

self._approved = None

1176

811

return False

1177

812

1178

813

def approve(self, value=True):

1179

self.send_changedstate()

1180

self.approved = value

1181

gobject.timeout_add(timedelta_to_milliseconds

1182

(self.approval_duration),

1183

self._reset_approved)

814

self._approved = value

815

gobject.timeout_add(self._timedelta_to_milliseconds(self.approved_duration, self._reset_approved))

816

817

def approved_pending(self):

818

return self.approvals_pending > 0

1184

819

1185

820

1186

821

## D-Bus methods, signals & properties

1187

_interface = "se.recompile.Mandos.Client"

822

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

1188

823

1189

824

## Signals

1190

825

1191

826

# CheckerCompleted - signal

1192

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

827

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

1193

828

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

1194

829

"D-Bus signal"

1195

830

pass

1196

831

1197

832

# CheckerStarted - signal

1198

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

833

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

1199

834

def CheckerStarted(self, command):

1200

835

"D-Bus signal"

1201

836

pass

1202

837

1203

838

# PropertyChanged - signal

1204

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

839

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

1205

840

def PropertyChanged(self, property, value):

1206

841

"D-Bus signal"

1207

842

pass

1209

844

# GotSecret - signal

1210

845

@dbus.service.signal(_interface)

1211

846

def GotSecret(self):

1212

"""D-Bus signal

1213

Is sent after a successful transfer of secret from the Mandos

1214

server to mandos-client

1215

"""

1216

pass

847

"D-Bus signal"

848

if self.approved_pending():

849

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

850

dbus.Boolean(False, variant_level=1))

1217

851

1218

852

# Rejected - signal

1219

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

853

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

1220

854

def Rejected(self, reason):

1221

855

"D-Bus signal"

1222

pass

856

if self.approved_pending():

857

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

858

dbus.Boolean(False, variant_level=1))

1223

859

1224

860

# NeedApproval - signal

1225

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

861

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

1226

862

def NeedApproval(self, timeout, default):

1227

863

"D-Bus signal"

1228

return self.need_approval()

1229

1230

# NeRwequest - signal

1231

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

1232

def NewRequest(self, ip):

1233

"""D-Bus signal

1234

Is sent after a client request a password.

1235

"""

1236

pass

864

if not self.approved_pending():

865

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

866

dbus.Boolean(True, variant_level=1))

1237

867

1238

868

## Methods

1239

869

1240

870

# Approve - method

1241

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

871

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

1242

872

def Approve(self, value):

1243

873

self.approve(value)

1244

874

1245

875

# CheckedOK - method

1246

876

@dbus.service.method(_interface)

1247

877

def CheckedOK(self):

1248

self.checked_ok()

878

return self.checked_ok()

1249

879

1250

880

# Enable - method

1251

881

@dbus.service.method(_interface)

1272

902

1273

903

## Properties

1274

904

1275

# ApprovalPending - property

1276

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

1277

def ApprovalPending_dbus_property(self):

1278

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

1279

1280

# ApprovedByDefault - property

1281

@dbus_service_property(_interface, signature="b",

1282

access="readwrite")

1283

def ApprovedByDefault_dbus_property(self, value=None):

1284

if value is None: # get

1285

return dbus.Boolean(self.approved_by_default)

1286

self.approved_by_default = bool(value)

1287

1288

# ApprovalDelay - property

1289

@dbus_service_property(_interface, signature="t",

1290

access="readwrite")

1291

def ApprovalDelay_dbus_property(self, value=None):

1292

if value is None: # get

1293

return dbus.UInt64(self.approval_delay_milliseconds())

1294

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

1295

1296

# ApprovalDuration - property

1297

@dbus_service_property(_interface, signature="t",

1298

access="readwrite")

1299

def ApprovalDuration_dbus_property(self, value=None):

1300

if value is None: # get

1301

return dbus.UInt64(timedelta_to_milliseconds(

1302

self.approval_duration))

1303

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

1304

1305

# Name - property

1306

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

1307

def Name_dbus_property(self):

905

# approved_pending - property

906

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

907

def approved_pending_dbus_property(self):

908

return dbus.Boolean(self.approved_pending())

909

910

# approved_by_default - property

911

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

912

access=u"readwrite")

913

def approved_by_default_dbus_property(self):

914

return dbus.Boolean(self.approved_by_default)

915

916

# approved_delay - property

917

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

918

access=u"readwrite")

919

def approved_delay_dbus_property(self):

920

return dbus.UInt64(self.approved_delay_milliseconds())

921

922

# approved_duration - property

923

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

924

access=u"readwrite")

925

def approved_duration_dbus_property(self):

926

return dbus.UInt64(self._timedelta_to_milliseconds(

927

self.approved_duration))

928

929

# name - property

930

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

931

def name_dbus_property(self):

1308

932

return dbus.String(self.name)

1309

933

1310

# Fingerprint - property

1311

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

1312

def Fingerprint_dbus_property(self):

934

# fingerprint - property

935

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

936

def fingerprint_dbus_property(self):

1313

937

return dbus.String(self.fingerprint)

1314

938

1315

# Host - property

1316

@dbus_service_property(_interface, signature="s",

1317

access="readwrite")

1318

def Host_dbus_property(self, value=None):

939

# host - property

940

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

941

access=u"readwrite")

942

def host_dbus_property(self, value=None):

1319

943

if value is None: # get

1320

944

return dbus.String(self.host)

1321

self.host = unicode(value)

1322

1323

# Created - property

1324

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

1325

def Created_dbus_property(self):

1326

return datetime_to_dbus(self.created)

1327

1328

# LastEnabled - property

1329

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

1330

def LastEnabled_dbus_property(self):

1331

return datetime_to_dbus(self.last_enabled)

1332

1333

# Enabled - property

1334

@dbus_service_property(_interface, signature="b",

1335

access="readwrite")

1336

def Enabled_dbus_property(self, value=None):

945

self.host = value

946

# Emit D-Bus signal

947

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

948

dbus.String(value, variant_level=1))

949

950

# created - property

951

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

952

def created_dbus_property(self):

953

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

954

955

# last_enabled - property

956

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

957

def last_enabled_dbus_property(self):

958

if self.last_enabled is None:

959

return dbus.String(u"")

960

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

961

962

# enabled - property

963

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

964

access=u"readwrite")

965

def enabled_dbus_property(self, value=None):

1337

966

if value is None: # get

1338

967

return dbus.Boolean(self.enabled)

1339

968

if value:

1341

970

else:

1342

971

self.disable()

1343

972

1344

# LastCheckedOK - property

1345

@dbus_service_property(_interface, signature="s",

1346

access="readwrite")

1347

def LastCheckedOK_dbus_property(self, value=None):

973

# last_checked_ok - property

974

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

975

access=u"readwrite")

976

def last_checked_ok_dbus_property(self, value=None):

1348

977

if value is not None:

1349

978

self.checked_ok()

1350

979

return

1351

return datetime_to_dbus(self.last_checked_ok)

1352

1353

# Expires - property

1354

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

1355

def Expires_dbus_property(self):

1356

return datetime_to_dbus(self.expires)

1357

1358

# LastApprovalRequest - property

1359

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

1360

def LastApprovalRequest_dbus_property(self):

1361

return datetime_to_dbus(self.last_approval_request)

1362

1363

# Timeout - property

1364

@dbus_service_property(_interface, signature="t",

1365

access="readwrite")

1366

def Timeout_dbus_property(self, value=None):

980

if self.last_checked_ok is None:

981

return dbus.String(u"")

982

return dbus.String(self._datetime_to_dbus(self

983

.last_checked_ok))

984

985

# timeout - property

986

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

987

access=u"readwrite")

988

def timeout_dbus_property(self, value=None):

1367

989

if value is None: # get

1368

990

return dbus.UInt64(self.timeout_milliseconds())

1369

991

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

992

# Emit D-Bus signal

993

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

994

dbus.UInt64(value, variant_level=1))

995

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

996

return

1370

997

# Reschedule timeout

1371

if self.enabled:

1372

now = datetime.datetime.utcnow()

1373

time_to_die = timedelta_to_milliseconds(

1374

(self.last_checked_ok + self.timeout) - now)

1375

if time_to_die <= 0:

1376

# The timeout has passed

1377

self.disable()

1378

else:

1379

self.expires = (now +

1380

datetime.timedelta(milliseconds =

1381

time_to_die))

1382

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

1383

is None):

1384

return

1385

gobject.source_remove(self.disable_initiator_tag)

1386

self.disable_initiator_tag = (gobject.timeout_add

1387

(time_to_die,

1388

self.disable))

1389

1390

# ExtendedTimeout - property

1391

@dbus_service_property(_interface, signature="t",

1392

access="readwrite")

1393

def ExtendedTimeout_dbus_property(self, value=None):

1394

if value is None: # get

1395

return dbus.UInt64(self.extended_timeout_milliseconds())

1396

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

1397

1398

# Interval - property

1399

@dbus_service_property(_interface, signature="t",

1400

access="readwrite")

1401

def Interval_dbus_property(self, value=None):

998

gobject.source_remove(self.disable_initiator_tag)

999

self.disable_initiator_tag = None

1000

time_to_die = (self.

1001

_timedelta_to_milliseconds((self

1002

.last_checked_ok

1003

+ self.timeout)

1004

- datetime.datetime

1005

.utcnow()))

1006

if time_to_die <= 0:

1007

# The timeout has passed

1008

self.disable()

1009

else:

1010

self.disable_initiator_tag = (gobject.timeout_add

1011

(time_to_die, self.disable))

1012

1013

# interval - property

1014

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

1015

access=u"readwrite")

1016

def interval_dbus_property(self, value=None):

1402

1017

if value is None: # get

1403

1018

return dbus.UInt64(self.interval_milliseconds())

1404

1019

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

1405

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

1020

# Emit D-Bus signal

1021

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

1022

dbus.UInt64(value, variant_level=1))

1023

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

1406

1024

return

1407

if self.enabled:

1408

# Reschedule checker run

1409

gobject.source_remove(self.checker_initiator_tag)

1410

self.checker_initiator_tag = (gobject.timeout_add

1411

(value, self.start_checker))

1412

self.start_checker() # Start one now, too

1413

1414

# Checker - property

1415

@dbus_service_property(_interface, signature="s",

1416

access="readwrite")

1417

def Checker_dbus_property(self, value=None):

1025

# Reschedule checker run

1026

gobject.source_remove(self.checker_initiator_tag)

1027

self.checker_initiator_tag = (gobject.timeout_add

1028

(value, self.start_checker))

1029

self.start_checker() # Start one now, too

1030

1031

# checker - property

1032

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

1033

access=u"readwrite")

1034

def checker_dbus_property(self, value=None):

1418

1035

if value is None: # get

1419

1036

return dbus.String(self.checker_command)

1420

self.checker_command = unicode(value)

1037

self.checker_command = value

1038

# Emit D-Bus signal

1039

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

1040

dbus.String(self.checker_command,

1041

variant_level=1))

1421

1042

1422

# CheckerRunning - property

1423

@dbus_service_property(_interface, signature="b",

1424

access="readwrite")

1425

def CheckerRunning_dbus_property(self, value=None):

1043

# checker_running - property

1044

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

1045

access=u"readwrite")

1046

def checker_running_dbus_property(self, value=None):

1426

1047

if value is None: # get

1427

1048

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

1428

1049

if value:

1430

1051

else:

1431

1052

self.stop_checker()

1432

1053

1433

# ObjectPath - property

1434

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

1435

def ObjectPath_dbus_property(self):

1054

# object_path - property

1055

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

1056

def object_path_dbus_property(self):

1436

1057

return self.dbus_object_path # is already a dbus.ObjectPath

1437

1058

1438

# Secret = property

1439

@dbus_service_property(_interface, signature="ay",

1440

access="write", byte_arrays=True)

1441

def Secret_dbus_property(self, value):

1059

# secret = property

1060

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

1061

access=u"write", byte_arrays=True)

1062

def secret_dbus_property(self, value):

1442

1063

self.secret = str(value)

1443

1064

1444

1065

del _interface

1450

1071

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

1451

1072

if not self._pipe.recv():

1452

1073

raise KeyError()

1453

1074

1454

1075

def __getattribute__(self, name):

1455

if name == '_pipe':

1076

if(name == '_pipe'):

1456

1077

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

1457

1078

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

1458

1079

data = self._pipe.recv()

1463

1084

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

1464

1085

return self._pipe.recv()[1]

1465

1086

return func

1466

1087

1467

1088

def __setattr__(self, name, value):

1468

if name == '_pipe':

1089

if(name == '_pipe'):

1469

1090

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

1470

1091

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

1471

1092

1472

1093

1473

class ClientDBusTransitional(ClientDBus):

1474

__metaclass__ = AlternateDBusNamesMetaclass

1475

1476

1477

1094

class ClientHandler(socketserver.BaseRequestHandler, object):

1478

1095

"""A class to handle client connections.

1479

1096

1482

1099

1483

1100

def handle(self):

1484

1101

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

1485

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

1102

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

1486

1103

unicode(self.client_address))

1487

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

1104

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

1488

1105

self.server.child_pipe.fileno())

1489

1106

1490

1107

session = (gnutls.connection

1491

1108

.ClientSession(self.request,

1492

1109

gnutls.connection

1493

1110

.X509Credentials()))

1494

1111

1495

1112

# Note: gnutls.connection.X509Credentials is really a

1496

1113

# generic GnuTLS certificate credentials object so long as

1497

1114

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

1498

1115

# here despite using OpenPGP certificates.

1499

1500

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

1501

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

1502

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

1503

# "+DHE-DSS"))

1116

1117

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

1118

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

1119

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

1120

# u"+DHE-DSS"))

1504

1121

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

1505

1122

priority = self.server.gnutls_priority

1506

1123

if priority is None:

1507

priority = "NORMAL"

1124

priority = u"NORMAL"

1508

1125

(gnutls.library.functions

1509

1126

.gnutls_priority_set_direct(session._c_object,

1510

1127

priority, None))

1511

1128

1512

1129

# Start communication using the Mandos protocol

1513

1130

# Get protocol number

1514

1131

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

1515

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

1132

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

1516

1133

try:

1517

1134

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

1518

1135

raise RuntimeError

1519

except (ValueError, IndexError, RuntimeError) as error:

1520

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

1136

except (ValueError, IndexError, RuntimeError), error:

1137

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

1521

1138

return

1522

1139

1523

1140

# Start GnuTLS connection

1524

1141

try:

1525

1142

session.handshake()

1526

except gnutls.errors.GNUTLSError as error:

1527

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

1143

except gnutls.errors.GNUTLSError, error:

1144

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

1528

1145

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

1529

1146

# established. Just abandon the request.

1530

1147

return

1531

logger.debug("Handshake succeeded")

1532

1148

logger.debug(u"Handshake succeeded")

1149

1533

1150

approval_required = False

1534

1151

try:

1535

1152

try:

1536

1153

fpr = self.fingerprint(self.peer_certificate

1537

1154

(session))

1538

except (TypeError,

1539

gnutls.errors.GNUTLSError) as error:

1540

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

1155

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

1156

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

1541

1157

return

1542

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

1543

1158

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

1159

1544

1160

try:

1545

1161

client = ProxyClient(child_pipe, fpr,

1546

1162

self.client_address)

1547

1163

except KeyError:

1548

1164

return

1549

1165

1550

if self.server.use_dbus:

1551

# Emit D-Bus signal

1552

client.NewRequest(str(self.client_address))

1553

1554

if client.approval_delay:

1555

delay = client.approval_delay

1166

if client.approved_delay:

1167

delay = client.approved_delay

1556

1168

client.approvals_pending += 1

1557

1169

approval_required = True

1558

1170

1559

1171

while True:

1560

1172

if not client.enabled:

1561

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

1173

logger.warning(u"Client %s is disabled",

1562

1174

client.name)

1563

1175

if self.server.use_dbus:

1564

1176

# Emit D-Bus signal

1565

client.Rejected("Disabled")

1177

client.Rejected("Disabled")

1566

1178

return

1567

1179

1568

if client.approved or not client.approval_delay:

1180

if client._approved or not client.approved_delay:

1569

1181

#We are approved or approval is disabled

1570

1182

break

1571

elif client.approved is None:

1572

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

1183

elif client._approved is None:

1184

logger.info(u"Client %s need approval",

1573

1185

client.name)

1574

1186

if self.server.use_dbus:

1575

1187

# Emit D-Bus signal

1576

1188

client.NeedApproval(

1577

client.approval_delay_milliseconds(),

1189

client.approved_delay_milliseconds(),

1578

1190

client.approved_by_default)

1579

1191

else:

1580

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

1192

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

1581

1193

client.name)

1582

1194

if self.server.use_dbus:

1583

1195

# Emit D-Bus signal

1584

client.Rejected("Denied")

1196

client.Rejected("Disapproved")

1585

1197

return

1586

1198

1587

1199

#wait until timeout or approved

1200

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

1588

1201

time = datetime.datetime.now()

1589

1202

client.changedstate.acquire()

1590

(client.changedstate.wait

1591

(float(client.timedelta_to_milliseconds(delay)

1592

/ 1000)))

1203

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

1593

1204

client.changedstate.release()

1594

1205

time2 = datetime.datetime.now()

1595

1206

if (time2 - time) >= delay:

1599

1210

client.name)

1600

1211

if self.server.use_dbus:

1601

1212

# Emit D-Bus signal

1602

client.Rejected("Approval timed out")

1213

client.Rejected("Time out")

1603

1214

return

1604

1215

else:

1605

1216

break

1608

1219

1609

1220

sent_size = 0

1610

1221

while sent_size < len(client.secret):

1611

try:

1612

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

1613

except gnutls.errors.GNUTLSError as error:

1614

logger.warning("gnutls send failed")

1615

return

1616

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

1222

# XXX handle session exception

1223

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

1224

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

1617

1225

sent, len(client.secret)

1618

1226

- (sent_size + sent))

1619

1227

sent_size += sent

1620

1621

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

1622

# bump the timeout using extended_timeout

1623

client.checked_ok(client.extended_timeout)

1228

1229

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

1230

# bump the timeout as if seen

1231

client.checked_ok()

1624

1232

if self.server.use_dbus:

1625

1233

# Emit D-Bus signal

1626

1234

client.GotSecret()

1628

1236

finally:

1629

1237

if approval_required:

1630

1238

client.approvals_pending -= 1

1631

try:

1632

session.bye()

1633

except gnutls.errors.GNUTLSError as error:

1634

logger.warning("GnuTLS bye failed")

1239

session.bye()

1635

1240

1636

1241

@staticmethod

1637

1242

def peer_certificate(session):

1647

1252

.gnutls_certificate_get_peers

1648

1253

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

1649

1254

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

1650

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

1651

" certificate")

1255

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

1256

u" certificate")

1652

1257

if list_size.value == 0:

1653

1258

return None

1654

1259

cert = cert_list[0]

1680

1285

if crtverify.value != 0:

1681

1286

gnutls.library.functions.gnutls_openpgp_crt_deinit(crt)

1682

1287

raise (gnutls.errors.CertificateSecurityError

1683

("Verify failed"))

1288

(u"Verify failed"))

1684

1289

# New buffer for the fingerprint

1685

1290

buf = ctypes.create_string_buffer(20)

1686

1291

buf_len = ctypes.c_size_t()

1693

1298

# Convert the buffer to a Python bytestring

1694

1299

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

1695

1300

# Convert the bytestring to hexadecimal notation

1696

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

1301

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

1697

1302

return hex_fpr

1698

1303

1699

1304

1702

1307

def sub_process_main(self, request, address):

1703

1308

try:

1704

1309

self.finish_request(request, address)

1705

except Exception:

1310

except:

1706

1311

self.handle_error(request, address)

1707

1312

self.close_request(request)

1708

1313

1709

1314

def process_request(self, request, address):

1710

1315

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

1711

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

1712

args = (request,

1713

address))

1714

proc.start()

1715

return proc

1716

1316

multiprocessing.Process(target = self.sub_process_main,

1317

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

1717

1318

1718

1319

class MultiprocessingMixInWithPipe(MultiprocessingMixIn, object):

1719

1320

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

1723

1324

This function creates a new pipe in self.pipe

1724

1325

"""

1725

1326

parent_pipe, self.child_pipe = multiprocessing.Pipe()

1726

1727

proc = MultiprocessingMixIn.process_request(self, request,

1728

client_address)

1729

self.child_pipe.close()

1730

self.add_pipe(parent_pipe, proc)

1731

1732

def add_pipe(self, parent_pipe, proc):

1327

1328

super(MultiprocessingMixInWithPipe,

1329

self).process_request(request, client_address)

1330

self.add_pipe(parent_pipe)

1331

def add_pipe(self, parent_pipe):

1733

1332

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

1734

raise NotImplementedError

1735

1333

pass

1736

1334

1737

1335

class IPv6_TCPServer(MultiprocessingMixInWithPipe,

1738

1336

socketserver.TCPServer, object):

1756

1354

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

1757

1355

if self.interface is not None:

1758

1356

if SO_BINDTODEVICE is None:

1759

logger.error("SO_BINDTODEVICE does not exist;"

1760

" cannot bind to interface %s",

1357

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

1358

u" cannot bind to interface %s",

1761

1359

self.interface)

1762

1360

else:

1763

1361

try:

1764

1362

self.socket.setsockopt(socket.SOL_SOCKET,

1765

1363

SO_BINDTODEVICE,

1766

1364

str(self.interface

1767

+ '\0'))

1768

except socket.error as error:

1365

+ u'\0'))

1366

except socket.error, error:

1769

1367

if error[0] == errno.EPERM:

1770

logger.error("No permission to"

1771

" bind to interface %s",

1368

logger.error(u"No permission to"

1369

u" bind to interface %s",

1772

1370

self.interface)

1773

1371

elif error[0] == errno.ENOPROTOOPT:

1774

logger.error("SO_BINDTODEVICE not available;"

1775

" cannot bind to interface %s",

1372

logger.error(u"SO_BINDTODEVICE not available;"

1373

u" cannot bind to interface %s",

1776

1374

self.interface)

1777

1375

else:

1778

1376

raise

1780

1378

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

1781

1379

if not self.server_address[0]:

1782

1380

if self.address_family == socket.AF_INET6:

1783

any_address = "::" # in6addr_any

1381

any_address = u"::" # in6addr_any

1784

1382

else:

1785

1383

any_address = socket.INADDR_ANY

1786

1384

self.server_address = (any_address,

1813

1411

self.enabled = False

1814

1412

self.clients = clients

1815

1413

if self.clients is None:

1816

self.clients = {}

1414

self.clients = set()

1817

1415

self.use_dbus = use_dbus

1818

1416

self.gnutls_priority = gnutls_priority

1819

1417

IPv6_TCPServer.__init__(self, server_address,

1823

1421

def server_activate(self):

1824

1422

if self.enabled:

1825

1423

return socketserver.TCPServer.server_activate(self)

1826

1827

1424

def enable(self):

1828

1425

self.enabled = True

1829

1830

def add_pipe(self, parent_pipe, proc):

1426

def add_pipe(self, parent_pipe):

1831

1427

# Call "handle_ipc" for both data and EOF events

1832

1428

gobject.io_add_watch(parent_pipe.fileno(),

1833

1429

gobject.IO_IN | gobject.IO_HUP,

1834

1430

functools.partial(self.handle_ipc,

1835

parent_pipe =

1836

parent_pipe,

1837

proc = proc))

1838

1431

parent_pipe = parent_pipe))

1432

1839

1433

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

1840

proc = None, client_object=None):

1434

client_object=None):

1841

1435

condition_names = {

1842

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

1843

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

1436

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

1437

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

1844

1438

# blocking).

1845

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

1846

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

1847

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

1439

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

1440

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

1441

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

1848

1442

# broken, usually for pipes and

1849

1443

# sockets).

1850

1444

}

1852

1446

for cond, name in

1853

1447

condition_names.iteritems()

1854

1448

if cond & condition)

1855

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

1856

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

1857

# Wait for other process to exit

1858

proc.join()

1859

return False

1449

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

1450

conditions_string)

1860

1451

1861

1452

# Read a request from the child

1862

1453

request = parent_pipe.recv()

1866

1457

fpr = request[1]

1867

1458

address = request[2]

1868

1459

1869

for c in self.clients.itervalues():

1460

for c in self.clients:

1870

1461

if c.fingerprint == fpr:

1871

1462

client = c

1872

1463

break

1873

1464

else:

1874

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

1875

"dress: %s", fpr, address)

1465

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

1466

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

1876

1467

if self.use_dbus:

1877

1468

# Emit D-Bus signal

1878

mandos_dbus_service.ClientNotFound(fpr,

1879

address[0])

1469

mandos_dbus_service.ClientNotFound(fpr, address)

1880

1470

parent_pipe.send(False)

1881

1471

return False

1882

1472

1883

1473

gobject.io_add_watch(parent_pipe.fileno(),

1884

1474

gobject.IO_IN | gobject.IO_HUP,

1885

1475

functools.partial(self.handle_ipc,

1886

parent_pipe =

1887

parent_pipe,

1888

proc = proc,

1889

client_object =

1890

client))

1476

parent_pipe = parent_pipe,

1477

client_object = client))

1891

1478

parent_pipe.send(True)

1892

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

1893

# same fileno

1479

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

1894

1480

return False

1895

1481

if command == 'funcall':

1896

1482

funcname = request[1]

1897

1483

args = request[2]

1898

1484

kwargs = request[3]

1899

1485

1900

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

1901

funcname)(*args,

1902

**kwargs)))

1903

1486

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

1487

1904

1488

if command == 'getattr':

1905

1489

attrname = request[1]

1906

1490

if callable(client_object.__getattribute__(attrname)):

1907

1491

parent_pipe.send(('function',))

1908

1492

else:

1909

parent_pipe.send(('data', client_object

1910

.__getattribute__(attrname)))

1911

1493

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

1494

1912

1495

if command == 'setattr':

1913

1496

attrname = request[1]

1914

1497

value = request[2]

1915

1498

setattr(client_object, attrname, value)

1916

1499

1917

1500

return True

1918

1501

1919

1502

1920

1503

def string_to_delta(interval):

1921

1504

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

1922

1505

1923

>>> string_to_delta('7d')

1506

>>> string_to_delta(u'7d')

1924

1507

datetime.timedelta(7)

1925

>>> string_to_delta('60s')

1508

>>> string_to_delta(u'60s')

1926

1509

datetime.timedelta(0, 60)

1927

>>> string_to_delta('60m')

1510

>>> string_to_delta(u'60m')

1928

1511

datetime.timedelta(0, 3600)

1929

>>> string_to_delta('24h')

1512

>>> string_to_delta(u'24h')

1930

1513

datetime.timedelta(1)

1931

>>> string_to_delta('1w')

1514

>>> string_to_delta(u'1w')

1932

1515

datetime.timedelta(7)

1933

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

1516

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

1934

1517

datetime.timedelta(0, 330)

1935

1518

"""

1936

1519

timevalue = datetime.timedelta(0)

1938

1521

try:

1939

1522

suffix = unicode(s[-1])

1940

1523

value = int(s[:-1])

1941

if suffix == "d":

1524

if suffix == u"d":

1942

1525

delta = datetime.timedelta(value)

1943

elif suffix == "s":

1526

elif suffix == u"s":

1944

1527

delta = datetime.timedelta(0, value)

1945

elif suffix == "m":

1528

elif suffix == u"m":

1946

1529

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

1947

elif suffix == "h":

1530

elif suffix == u"h":

1948

1531

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

1949

elif suffix == "w":

1532

elif suffix == u"w":

1950

1533

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

1951

1534

else:

1952

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

1953

except (ValueError, IndexError) as e:

1954

raise ValueError(*(e.args))

1535

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

1536

except (ValueError, IndexError), e:

1537

raise ValueError(e.message)

1955

1538

timevalue += delta

1956

1539

return timevalue

1957

1540

1958

1541

1542

def if_nametoindex(interface):

1543

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

1544

1545

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

1546

global if_nametoindex

1547

try:

1548

if_nametoindex = (ctypes.cdll.LoadLibrary

1549

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

1550

.if_nametoindex)

1551

except (OSError, AttributeError):

1552

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

1553

def if_nametoindex(interface):

1554

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

1555

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

1556

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

1557

ifreq = fcntl.ioctl(s, SIOCGIFINDEX,

1558

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

1559

interface))

1560

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

1561

ifreq[16:20])[0]

1562

return interface_index

1563

return if_nametoindex(interface)

1564

1565

1959

1566

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

1960

1567

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

1961

1568

1964

1571

sys.exit()

1965

1572

os.setsid()

1966

1573

if not nochdir:

1967

os.chdir("/")

1574

os.chdir(u"/")

1968

1575

if os.fork():

1969

1576

sys.exit()

1970

1577

if not noclose:

1972

1579

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

1973

1580

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

1974

1581

raise OSError(errno.ENODEV,

1975

"%s not a character device"

1582

u"%s not a character device"

1976

1583

% os.path.devnull)

1977

1584

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

1978

1585

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

1986

1593

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

1987

1594

# Parsing of options, both command line and config file

1988

1595

1989

parser = argparse.ArgumentParser()

1990

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

1991

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

1992

help="show version number and exit")

1993

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

1994

help="Bind to interface IF")

1995

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

1996

help="Address to listen for requests on")

1997

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

1998

help="Port number to receive requests on")

1999

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

2000

help="Run self-test")

2001

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

2002

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

2003

" to terminal")

2004

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

2005

help="Debug level for stdout output")

2006

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

2007

" priority string (see GnuTLS documentation)")

2008

parser.add_argument("--servicename",

2009

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

2010

parser.add_argument("--configdir",

2011

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

2012

help="Directory to search for configuration"

2013

" files")

2014

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

2015

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

2016

" system bus interface")

2017

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

2018

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

2019

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

2020

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

2021

" state")

2022

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

2023

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

2024

2025

options = parser.parse_args()

1596

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

1597

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

1598

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

1599

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

1600

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

1601

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

1602

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

1603

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

1604

help=u"Run self-test")

1605

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

1606

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

1607

u" terminal")

1608

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

1609

u" priority string (see GnuTLS documentation)")

1610

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

1611

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

1612

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

1613

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

1614

help=u"Directory to search for configuration"

1615

u" files")

1616

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

1617

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

1618

u" system bus interface")

1619

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

1620

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

1621

options = parser.parse_args()[0]

2026

1622

2027

1623

if options.check:

2028

1624

import doctest

2030

1626

sys.exit()

2031

1627

2032

1628

# Default values for config file for server-global settings

2033

server_defaults = { "interface": "",

2034

"address": "",

2035

"port": "",

2036

"debug": "False",

2037

"priority":

2038

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

2039

"servicename": "Mandos",

2040

"use_dbus": "True",

2041

"use_ipv6": "True",

2042

"debuglevel": "",

2043

"restore": "True",

2044

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

1629

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

1630

u"address": u"",

1631

u"port": u"",

1632

u"debug": u"False",

1633

u"priority":

1634

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

1635

u"servicename": u"Mandos",

1636

u"use_dbus": u"True",

1637

u"use_ipv6": u"True",

2045

1638

}

2046

1639

2047

1640

# Parse config file for server-global settings

2048

1641

server_config = configparser.SafeConfigParser(server_defaults)

2049

1642

del server_defaults

2050

1643

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

2051

"mandos.conf"))

1644

u"mandos.conf"))

2052

1645

# Convert the SafeConfigParser object to a dict

2053

1646

server_settings = server_config.defaults()

2054

1647

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

2055

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

2056

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

1648

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

1649

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

2057

1650

option)

2058

1651

if server_settings["port"]:

2059

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

2060

"port")

1652

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

1653

u"port")

2061

1654

del server_config

2062

1655

2063

1656

# Override the settings from the config file with command line

2064

1657

# options, if set.

2065

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

2066

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

2067

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

2068

"statedir"):

1658

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

1659

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

1660

u"use_dbus", u"use_ipv6"):

2069

1661

value = getattr(options, option)

2070

1662

if value is not None:

2071

1663

server_settings[option] = value

2079

1671

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

2080

1672

2081

1673

# For convenience

2082

debug = server_settings["debug"]

2083

debuglevel = server_settings["debuglevel"]

2084

use_dbus = server_settings["use_dbus"]

2085

use_ipv6 = server_settings["use_ipv6"]

2086

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

2087

stored_state_file)

2088

2089

if debug:

2090

initlogger(debug, logging.DEBUG)

2091

else:

2092

if not debuglevel:

2093

initlogger(debug)

2094

else:

2095

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

2096

initlogger(debug, level)

2097

2098

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

1674

debug = server_settings[u"debug"]

1675

use_dbus = server_settings[u"use_dbus"]

1676

use_ipv6 = server_settings[u"use_ipv6"]

1677

1678

if not debug:

1679

syslogger.setLevel(logging.WARNING)

1680

console.setLevel(logging.WARNING)

1681

1682

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

2099

1683

syslogger.setFormatter(logging.Formatter

2100

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

2101

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

2102

% server_settings["servicename"]))

1684

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

1685

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

1686

% server_settings[u"servicename"]))

2103

1687

2104

1688

# Parse config file with clients

2105

client_config = configparser.SafeConfigParser(Client

2106

.client_defaults)

2107

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

2108

"clients.conf"))

1689

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

1690

u"interval": u"5m",

1691

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

1692

u"host": u"",

1693

u"approved_delay": u"0s",

1694

u"approved_duration": u"1s",

1695

}

1696

client_config = configparser.SafeConfigParser(client_defaults)

1697

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

1698

u"clients.conf"))

2109

1699

2110

1700

global mandos_dbus_service

2111

1701

mandos_dbus_service = None

2112

1702

2113

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

2114

server_settings["port"]),

1703

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

1704

server_settings[u"port"]),

2115

1705

ClientHandler,

2116

interface=(server_settings["interface"]

2117

or None),

1706

interface=server_settings[u"interface"],

2118

1707

use_ipv6=use_ipv6,

2119

1708

gnutls_priority=

2120

server_settings["priority"],

1709

server_settings[u"priority"],

2121

1710

use_dbus=use_dbus)

2122

if not debug:

2123

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

2124

try:

2125

pidfile = open(pidfilename, "w")

2126

except IOError:

2127

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

1711

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

1712

try:

1713

pidfile = open(pidfilename, u"w")

1714

except IOError:

1715

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

2128

1716

2129

1717

try:

2130

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

2131

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

1718

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

1719

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

2132

1720

except KeyError:

2133

1721

try:

2134

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

2135

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

1722

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

1723

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

2136

1724

except KeyError:

2137

1725

try:

2138

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

2139

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

1726

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

1727

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

2140

1728

except KeyError:

2141

1729

uid = 65534

2142

1730

gid = 65534

2143

1731

try:

2144

1732

os.setgid(gid)

2145

1733

os.setuid(uid)

2146

except OSError as error:

1734

except OSError, error:

2147

1735

if error[0] != errno.EPERM:

2148

1736

raise error

2149

1737

1738

# Enable all possible GnuTLS debugging

2150

1739

if debug:

2151

# Enable all possible GnuTLS debugging

2152

2153

1740

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

2154

1741

# - GnuTLS manual

2155

1742

gnutls.library.functions.gnutls_global_set_log_level(11)

2156

1743

2157

1744

@gnutls.library.types.gnutls_log_func

2158

1745

def debug_gnutls(level, string):

2159

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

1746

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

2160

1747

2161

1748

(gnutls.library.functions

2162

1749

.gnutls_global_set_log_function(debug_gnutls))

2163

2164

# Redirect stdin so all checkers get /dev/null

2165

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

2166

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

2167

if null > 2:

2168

os.close(null)

2169

2170

# Need to fork before connecting to D-Bus

2171

if not debug:

2172

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

2173

daemon()

2174

2175

gobject.threads_init()

2176

1750

2177

1751

global main_loop

2178

1752

# From the Avahi example code

2182

1756

# End of Avahi example code

2183

1757

if use_dbus:

2184

1758

try:

2185

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

1759

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

2186

1760

bus, do_not_queue=True)

2187

old_bus_name = (dbus.service.BusName

2188

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

2189

do_not_queue=True))

2190

except dbus.exceptions.NameExistsException as e:

2191

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

1761

except dbus.exceptions.NameExistsException, e:

1762

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

2192

1763

use_dbus = False

2193

server_settings["use_dbus"] = False

1764

server_settings[u"use_dbus"] = False

2194

1765

tcp_server.use_dbus = False

2195

1766

protocol = avahi.PROTO_INET6 if use_ipv6 else avahi.PROTO_INET

2196

service = AvahiServiceToSyslog(name =

2197

server_settings["servicename"],

2198

servicetype = "_mandos._tcp",

2199

protocol = protocol, bus = bus)

1767

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

1768

servicetype = u"_mandos._tcp",

1769

protocol = protocol, bus = bus)

2200

1770

if server_settings["interface"]:

2201

1771

service.interface = (if_nametoindex

2202

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

2203

2204

global multiprocessing_manager

2205

multiprocessing_manager = multiprocessing.Manager()

1772

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

2206

1773

2207

1774

client_class = Client

2208

1775

if use_dbus:

2209

client_class = functools.partial(ClientDBusTransitional,

2210

bus = bus)

2211

2212

client_settings = Client.config_parser(client_config)

2213

old_client_settings = {}

2214

clients_data = {}

2215

2216

# Get client data and settings from last running state.

2217

if server_settings["restore"]:

2218

try:

2219

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

2220

clients_data, old_client_settings = (pickle.load

2221

(stored_state))

2222

os.remove(stored_state_path)

2223

except IOError as e:

2224

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

2225

.format(e))

2226

if e.errno != errno.ENOENT:

2227

raise

2228

except EOFError as e:

2229

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

2230

"EOFError: {0}".format(e))

2231

2232

with PGPEngine() as pgp:

2233

for client_name, client in clients_data.iteritems():

2234

# Decide which value to use after restoring saved state.

2235

# We have three different values: Old config file,

2236

# new config file, and saved state.

2237

# New config value takes precedence if it differs from old

2238

# config value, otherwise use saved state.

2239

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

2240

try:

2241

# For each value in new config, check if it

2242

# differs from the old config value (Except for

2243

# the "secret" attribute)

2244

if (name != "secret" and

2245

value != old_client_settings[client_name]

2246

[name]):

2247

client[name] = value

2248

except KeyError:

2249

pass

2250

2251

# Clients who has passed its expire date can still be

2252

# enabled if its last checker was successful. Clients

2253

# whose checker failed before we stored its state is

2254

# assumed to have failed all checkers during downtime.

2255

if client["enabled"]:

2256

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

2257

if not client["last_checked_ok"]:

2258

logger.warning(

2259

"disabling client {0} - Client never "

2260

"performed a successfull checker"

2261

.format(client["name"]))

2262

client["enabled"] = False

2263

elif client["last_checker_status"] != 0:

2264

logger.warning(

2265

"disabling client {0} - Client "

2266

"last checker failed with error code {1}"

2267

.format(client["name"],

2268

client["last_checker_status"]))

2269

client["enabled"] = False

2270

else:

2271

client["expires"] = (datetime.datetime

2272

.utcnow()

2273

+ client["timeout"])

2274

logger.debug("Last checker succeeded,"

2275

" keeping {0} enabled"

2276

.format(client["name"]))

1776

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

1777

def client_config_items(config, section):

1778

special_settings = {

1779

"approved_by_default":

1780

lambda: config.getboolean(section,

1781

"approved_by_default"),

1782

}

1783

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

2277

1784

try:

2278

client["secret"] = (

2279

pgp.decrypt(client["encrypted_secret"],

2280

client_settings[client_name]

2281

["secret"]))

2282

except PGPError:

2283

# If decryption fails, we use secret from new settings

2284

logger.debug("Failed to decrypt {0} old secret"

2285

.format(client_name))

2286

client["secret"] = (

2287

client_settings[client_name]["secret"])

2288

2289

2290

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

2291

for client_name in (set(old_client_settings)

2292

- set(client_settings)):

2293

del clients_data[client_name]

2294

for client_name in (set(client_settings)

2295

- set(old_client_settings)):

2296

clients_data[client_name] = client_settings[client_name]

2297

2298

# Create clients all clients

2299

for client_name, client in clients_data.iteritems():

2300

tcp_server.clients[client_name] = client_class(

2301

name = client_name, settings = client)

2302

1785

yield (name, special_settings[name]())

1786

except KeyError:

1787

yield (name, value)

1788

1789

tcp_server.clients.update(set(

1790

client_class(name = section,

1791

config= dict(client_config_items(

1792

client_config, section)))

1793

for section in client_config.sections()))

2303

1794

if not tcp_server.clients:

2304

logger.warning("No clients defined")

2305

1795

logger.warning(u"No clients defined")

1796

1797

if debug:

1798

# Redirect stdin so all checkers get /dev/null

1799

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

1800

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

1801

if null > 2:

1802

os.close(null)

1803

else:

1804

# No console logging

1805

logger.removeHandler(console)

1806

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

1807

daemon()

1808

1809

try:

1810

with pidfile:

1811

pid = os.getpid()

1812

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

1813

del pidfile

1814

except IOError:

1815

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

1816

pidfilename, pid)

1817

except NameError:

1818

# "pidfile" was never created

1819

pass

1820

del pidfilename

1821

2306

1822

if not debug:

2307

try:

2308

with pidfile:

2309

pid = os.getpid()

2310

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

2311

del pidfile

2312

except IOError:

2313

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

2314

pidfilename, pid)

2315

except NameError:

2316

# "pidfile" was never created

2317

pass

2318

del pidfilename

2319

1823

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

2320

2321

1824

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

2322

1825

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

2323

1826

2325

1828

class MandosDBusService(dbus.service.Object):

2326

1829

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

2327

1830

def __init__(self):

2328

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

2329

_interface = "se.recompile.Mandos"

1831

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

1832

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

2330

1833

2331

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

1834

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

2332

1835

def ClientAdded(self, objpath):

2333

1836

"D-Bus signal"

2334

1837

pass

2335

1838

2336

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

1839

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

2337

1840

def ClientNotFound(self, fingerprint, address):

2338

1841

"D-Bus signal"

2339

1842

pass

2340

1843

2341

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

1844

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

2342

1845

def ClientRemoved(self, objpath, name):

2343

1846

"D-Bus signal"

2344

1847

pass

2345

1848

2346

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

1849

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

2347

1850

def GetAllClients(self):

2348

1851

"D-Bus method"

2349

1852

return dbus.Array(c.dbus_object_path

2350

for c in

2351

tcp_server.clients.itervalues())

1853

for c in tcp_server.clients)

2352

1854

2353

1855

@dbus.service.method(_interface,

2354

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

1856

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

2355

1857

def GetAllClientsWithProperties(self):

2356

1858

"D-Bus method"

2357

1859

return dbus.Dictionary(

2358

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

2359

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

2360

signature="oa{sv}")

1860

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

1861

for c in tcp_server.clients),

1862

signature=u"oa{sv}")

2361

1863

2362

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

1864

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

2363

1865

def RemoveClient(self, object_path):

2364

1866

"D-Bus method"

2365

for c in tcp_server.clients.itervalues():

1867

for c in tcp_server.clients:

2366

1868

if c.dbus_object_path == object_path:

2367

del tcp_server.clients[c.name]

1869

tcp_server.clients.remove(c)

2368

1870

c.remove_from_connection()

2369

1871

# Don't signal anything except ClientRemoved

2370

1872

c.disable(quiet=True)

2375

1877

2376

1878

del _interface

2377

1879

2378

class MandosDBusServiceTransitional(MandosDBusService):

2379

__metaclass__ = AlternateDBusNamesMetaclass

2380

mandos_dbus_service = MandosDBusServiceTransitional()

1880

mandos_dbus_service = MandosDBusService()

2381

1881

2382

1882

def cleanup():

2383

1883

"Cleanup function; run on exit"

2384

1884

service.cleanup()

2385

1885

2386

multiprocessing.active_children()

2387

if not (tcp_server.clients or client_settings):

2388

return

2389

2390

# Store client before exiting. Secrets are encrypted with key

2391

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

2392

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

2393

clients = {}

2394

with PGPEngine() as pgp:

2395

for client in tcp_server.clients.itervalues():

2396

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

2397

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

2398

key)

2399

client_dict = {}

2400

2401

# A list of attributes that can not be pickled

2402

# + secret.

2403

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

2404

"checker"))

2405

for name, typ in (inspect.getmembers

2406

(dbus.service.Object)):

2407

exclude.add(name)

2408

2409

client_dict["encrypted_secret"] = (client

2410

.encrypted_secret)

2411

for attr in client.client_structure:

2412

if attr not in exclude:

2413

client_dict[attr] = getattr(client, attr)

2414

2415

clients[client.name] = client_dict

2416

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

2417

2418

try:

2419

tempfd, tempname = tempfile.mkstemp(suffix=".pickle",

2420

prefix="clients-",

2421

dir=os.path.dirname

2422

(stored_state_path))

2423

with os.fdopen(tempfd, "wb") as stored_state:

2424

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

2425

os.rename(tempname, stored_state_path)

2426

except (IOError, OSError) as e:

2427

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

2428

.format(e))

2429

if not debug:

2430

try:

2431

os.remove(tempname)

2432

except NameError:

2433

pass

2434

if e.errno not in set((errno.ENOENT, errno.EACCES,

2435

errno.EEXIST)):

2436

raise e

2437

2438

# Delete all clients, and settings from config

2439

1886

while tcp_server.clients:

2440

name, client = tcp_server.clients.popitem()

1887

client = tcp_server.clients.pop()

2441

1888

if use_dbus:

2442

1889

client.remove_from_connection()

1890

client.disable_hook = None

2443

1891

# Don't signal anything except ClientRemoved

2444

1892

client.disable(quiet=True)

2445

1893

if use_dbus:

2446

1894

# Emit D-Bus signal

2447

mandos_dbus_service.ClientRemoved(client

2448

.dbus_object_path,

1895

mandos_dbus_service.ClientRemoved(client.dbus_object_path,

2449

1896

client.name)

2450

client_settings.clear()

2451

1897

2452

1898

atexit.register(cleanup)

2453

1899

2454

for client in tcp_server.clients.itervalues():

1900

for client in tcp_server.clients:

2455

1901

if use_dbus:

2456

1902

# Emit D-Bus signal

2457

1903

mandos_dbus_service.ClientAdded(client.dbus_object_path)

2458

# Need to initiate checking of clients

2459

if client.enabled:

2460

client.init_checker()

1904

client.enable()

2461

1905

2462

1906

tcp_server.enable()

2463

1907

tcp_server.server_activate()

2465

1909

# Find out what port we got

2466

1910

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

2467

1911

if use_ipv6:

2468

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

1912

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

2469

1913

" flowinfo %d, scope_id %d"

2470

1914

% tcp_server.socket.getsockname())

2471

1915

else: # IPv4

2472

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

1916

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

2473

1917

% tcp_server.socket.getsockname())

2474

1918

2475

1919

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

2478

1922

# From the Avahi example code

2479

1923

try:

2480

1924

service.activate()

2481

except dbus.exceptions.DBusException as error:

2482

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

1925

except dbus.exceptions.DBusException, error:

1926

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

2483

1927

cleanup()

2484

1928

sys.exit(1)

2485

1929

# End of Avahi example code

2489

1933

(tcp_server.handle_request

2490

1934

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

2491

1935

2492

logger.debug("Starting main loop")

1936

logger.debug(u"Starting main loop")

2493

1937

main_loop.run()

2494

except AvahiError as error:

2495

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

1938

except AvahiError, error:

1939

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

2496

1940

cleanup()

2497

1941

sys.exit(1)

2498

1942

except KeyboardInterrupt:

2499

1943

if debug:

2500

print("", file=sys.stderr)

2501

logger.debug("Server received KeyboardInterrupt")

2502

logger.debug("Server exiting")

1944

print >> sys.stderr

1945

logger.debug(u"Server received KeyboardInterrupt")

1946

logger.debug(u"Server exiting")

2503

1947

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

2504

1948

cleanup()

2505

1949