/mandos/trunk : revision 416.1.2

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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 fcntl

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import functools

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import cPickle as pickle

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import multiprocessing

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import types

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import binascii

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import tempfile

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import select

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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 = "1.4.1"

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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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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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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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"""

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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 approval_delay_milliseconds(self):

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return timedelta_to_milliseconds(self.approval_delay)

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@staticmethod

461

def config_parser(config):

462

""" 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"""

465

settings = {}

466

for client_name in config.sections():

467

section = dict(config.items(client_name))

468

client = settings[client_name] = {}

469

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

471

# Reformat values from string types to Python types

472

client["approved_by_default"] = config.getboolean(

473

client_name, "approved_by_default")

474

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

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476

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

477

.replace(" ", ""))

478

if "secret" in section:

479

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

480

elif "secfile" in section:

481

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

482

(section["secfile"])),

483

"rb") as secfile:

484

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

485

else:

486

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

487

% section)

488

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

489

client["extended_timeout"] = string_to_delta(

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section["extended_timeout"])

491

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

492

client["approval_delay"] = string_to_delta(

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section["approval_delay"])

494

client["approval_duration"] = string_to_delta(

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section["approval_duration"])

496

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

497

client["last_approval_request"] = None

498

client["last_checked_ok"] = None

499

client["last_checker_status"] = None

500

if client["enabled"]:

501

client["last_enabled"] = datetime.datetime.utcnow()

502

client["expires"] = (datetime.datetime.utcnow()

503

+ client["timeout"])

504

else:

505

client["last_enabled"] = None

506

client["expires"] = None

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return settings

509

510

511

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

278

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

512

279

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

513

280

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

514

281

attribute."""

515

282

self.name = name

516

# adding all client settings

517

for setting, value in settings.iteritems():

518

setattr(self, setting, value)

519

520

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

283

if config is None:

284

config = {}

285

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

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# Uppercase and remove spaces from fingerprint for later

522

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# comparison purposes with return value from the fingerprint()

523

288

# function

524

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

525

self.created = settings.get("created", datetime.datetime.utcnow())

526

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# attributes specific for this server instance

289

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

290

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

291

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

292

if u"secret" in config:

293

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

294

elif u"secfile" in config:

295

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

296

(config[u"secfile"])),

297

"rb") as secfile:

298

self.secret = secfile.read()

299

else:

300

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

301

% self.name)

302

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

303

self.created = datetime.datetime.utcnow()

304

self.enabled = False

305

self.last_enabled = None

306

self.last_checked_ok = None

307

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

308

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

309

self.disable_hook = disable_hook

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310

self.checker = None

529

311

self.checker_initiator_tag = None

530

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self.disable_initiator_tag = None

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313

self.checker_callback_tag = None

314

self.checker_command = config[u"checker"]

532

315

self.current_checker_command = None

533

self.approved = None

534

self.approvals_pending = 0

535

self.changedstate = (multiprocessing_manager

536

.Condition(multiprocessing_manager

537

.Lock()))

538

self.client_structure = [attr for attr in

539

self.__dict__.iterkeys()

540

if not attr.startswith("_")]

541

self.client_structure.append("client_structure")

542

543

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

544

lambda obj:

545

isinstance(obj,

546

property)):

547

if not name.startswith("_"):

548

self.client_structure.append(name)

549

550

# Send notice to process children that client state has changed

551

def send_changedstate(self):

552

with self.changedstate:

553

self.changedstate.notify_all()

316

self.last_connect = None

554

317

555

318

def enable(self):

556

319

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

557

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

320

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

558

321

# Already enabled

559

322

return

560

self.send_changedstate()

561

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

562

self.enabled = True

563

323

self.last_enabled = datetime.datetime.utcnow()

564

self.init_checker()

565

566

def disable(self, quiet=True):

567

"""Disable this client."""

568

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

569

return False

570

if not quiet:

571

self.send_changedstate()

572

if not quiet:

573

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

574

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

575

gobject.source_remove(self.disable_initiator_tag)

576

self.disable_initiator_tag = None

577

self.expires = None

578

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

579

gobject.source_remove(self.checker_initiator_tag)

580

self.checker_initiator_tag = None

581

self.stop_checker()

582

self.enabled = False

583

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

584

return False

585

586

def __del__(self):

587

self.disable()

588

589

def init_checker(self):

590

324

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

591

325

# and every interval from then on.

592

326

self.checker_initiator_tag = (gobject.timeout_add

596

330

self.disable_initiator_tag = (gobject.timeout_add

597

331

(self.timeout_milliseconds(),

598

332

self.disable))

333

self.enabled = True

599

334

# Also start a new checker *right now*.

600

335

self.start_checker()

601

336

337

def disable(self, quiet=True):

338

"""Disable this client."""

339

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

340

return False

341

if not quiet:

342

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

343

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

344

gobject.source_remove(self.disable_initiator_tag)

345

self.disable_initiator_tag = None

346

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

347

gobject.source_remove(self.checker_initiator_tag)

348

self.checker_initiator_tag = None

349

self.stop_checker()

350

if self.disable_hook:

351

self.disable_hook(self)

352

self.enabled = False

353

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

354

return False

355

356

def __del__(self):

357

self.disable_hook = None

358

self.disable()

359

602

360

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

603

361

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

604

362

self.checker_callback_tag = None

605

363

self.checker = None

606

364

if os.WIFEXITED(condition):

607

self.last_checker_status = os.WEXITSTATUS(condition)

608

if self.last_checker_status == 0:

609

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

365

exitstatus = os.WEXITSTATUS(condition)

366

if exitstatus == 0:

367

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

610

368

vars(self))

611

369

self.checked_ok()

612

370

else:

613

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

371

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

614

372

vars(self))

615

373

else:

616

self.last_checker_status = -1

617

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

374

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

618

375

vars(self))

619

376

620

def checked_ok(self, timeout=None):

377

def checked_ok(self):

621

378

"""Bump up the timeout for this client.

622

379

623

380

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

624

381

alive and well.

625

382

"""

626

if timeout is None:

627

timeout = self.timeout

628

383

self.last_checked_ok = datetime.datetime.utcnow()

629

if self.disable_initiator_tag is not None:

630

gobject.source_remove(self.disable_initiator_tag)

631

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

632

self.disable_initiator_tag = (gobject.timeout_add

633

(timedelta_to_milliseconds

634

(timeout), self.disable))

635

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

636

637

def need_approval(self):

638

self.last_approval_request = datetime.datetime.utcnow()

384

gobject.source_remove(self.disable_initiator_tag)

385

self.disable_initiator_tag = (gobject.timeout_add

386

(self.timeout_milliseconds(),

387

self.disable))

639

388

640

389

def start_checker(self):

641

390

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

654

403

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

655

404

try:

656

405

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

657

except (AttributeError, OSError) as error:

406

except (AttributeError, OSError), error:

658

407

if (isinstance(error, OSError)

659

408

and error.errno != errno.ECHILD):

660

409

raise error

661

410

else:

662

411

if pid:

663

logger.warning("Checker was a zombie")

412

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

664

413

gobject.source_remove(self.checker_callback_tag)

665

414

self.checker_callback(pid, status,

666

415

self.current_checker_command)

671

420

command = self.checker_command % self.host

672

421

except TypeError:

673

422

# Escape attributes for the shell

674

escaped_attrs = dict(

675

(attr,

676

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

677

errors=

678

'replace')))

679

for attr in

680

self.runtime_expansions)

681

423

escaped_attrs = dict((key,

424

re.escape(unicode(str(val),

425

errors=

426

u'replace')))

427

for key, val in

428

vars(self).iteritems())

682

429

try:

683

430

command = self.checker_command % escaped_attrs

684

except TypeError as error:

685

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

686

' %s', self.checker_command, error)

431

except TypeError, error:

432

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

433

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

687

434

return True # Try again later

688

435

self.current_checker_command = command

689

436

try:

690

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

437

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

691

438

command, self.name)

692

439

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

693

440

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

695

442

# always replaced by /dev/null.)

696

443

self.checker = subprocess.Popen(command,

697

444

close_fds=True,

698

shell=True, cwd="/")

445

shell=True, cwd=u"/")

699

446

self.checker_callback_tag = (gobject.child_watch_add

700

447

(self.checker.pid,

701

448

self.checker_callback,

706

453

if pid:

707

454

gobject.source_remove(self.checker_callback_tag)

708

455

self.checker_callback(pid, status, command)

709

except OSError as error:

710

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

456

except OSError, error:

457

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

711

458

error)

712

459

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

713

460

return True

717

464

if self.checker_callback_tag:

718

465

gobject.source_remove(self.checker_callback_tag)

719

466

self.checker_callback_tag = None

720

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

467

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

721

468

return

722

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

469

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

723

470

try:

724

471

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

725

472

#time.sleep(0.5)

726

473

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

727

474

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

728

except OSError as error:

475

except OSError, error:

729

476

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

730

477

raise

731

478

self.checker = None

732

479

733

480

734

def dbus_service_property(dbus_interface, signature="v",

735

access="readwrite", byte_arrays=False):

481

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

482

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

736

483

"""Decorators for marking methods of a DBusObjectWithProperties to

737

484

become properties on the D-Bus.

738

485

745

492

"""

746

493

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

747

494

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

748

if byte_arrays and signature != "ay":

749

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

750

" signature %r" % signature)

495

if byte_arrays and signature != u"ay":

496

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

497

u" signature %r" % signature)

751

498

def decorator(func):

752

499

func._dbus_is_property = True

753

500

func._dbus_interface = dbus_interface

754

501

func._dbus_signature = signature

755

502

func._dbus_access = access

756

503

func._dbus_name = func.__name__

757

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

504

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

758

505

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

759

func._dbus_get_args_options = {'byte_arrays': byte_arrays }

506

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

760

507

return func

761

508

return decorator

762

509

782

529

783

530

class DBusObjectWithProperties(dbus.service.Object):

784

531

"""A D-Bus object with properties.

785

532

786

533

Classes inheriting from this can use the dbus_service_property

787

534

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

788

535

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

790

537

791

538

@staticmethod

792

539

def _is_dbus_property(obj):

793

return getattr(obj, "_dbus_is_property", False)

540

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

794

541

795

542

def _get_all_dbus_properties(self):

796

543

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

797

544

"""

798

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

799

for cls in self.__class__.__mro__

545

return ((prop._dbus_name, prop)

800

546

for name, prop in

801

inspect.getmembers(cls, self._is_dbus_property))

547

inspect.getmembers(self, self._is_dbus_property))

802

548

803

549

def _get_dbus_property(self, interface_name, property_name):

804

550

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

805

551

property with the specified name and interface.

806

552

"""

807

for cls in self.__class__.__mro__:

808

for name, value in (inspect.getmembers

809

(cls, self._is_dbus_property)):

810

if (value._dbus_name == property_name

811

and value._dbus_interface == interface_name):

812

return value.__get__(self)

813

553

for name in (property_name,

554

property_name + u"_dbus_property"):

555

prop = getattr(self, name, None)

556

if (prop is None

557

or not self._is_dbus_property(prop)

558

or prop._dbus_name != property_name

559

or (interface_name and prop._dbus_interface

560

and interface_name != prop._dbus_interface)):

561

continue

562

return prop

814

563

# No such property

815

raise DBusPropertyNotFound(self.dbus_object_path + ":"

816

+ interface_name + "."

564

raise DBusPropertyNotFound(self.dbus_object_path + u":"

565

+ interface_name + u"."

817

566

+ property_name)

818

567

819

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

820

out_signature="v")

568

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

569

out_signature=u"v")

821

570

def Get(self, interface_name, property_name):

822

571

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

823

572

"""

824

573

prop = self._get_dbus_property(interface_name, property_name)

825

if prop._dbus_access == "write":

574

if prop._dbus_access == u"write":

826

575

raise DBusPropertyAccessException(property_name)

827

576

value = prop()

828

if not hasattr(value, "variant_level"):

577

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

829

578

return value

830

579

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

831

580

832

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

581

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

833

582

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

834

583

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

835

584

"""

836

585

prop = self._get_dbus_property(interface_name, property_name)

837

if prop._dbus_access == "read":

586

if prop._dbus_access == u"read":

838

587

raise DBusPropertyAccessException(property_name)

839

if prop._dbus_get_args_options["byte_arrays"]:

588

if prop._dbus_get_args_options[u"byte_arrays"]:

840

589

# The byte_arrays option is not supported yet on

841

590

# signatures other than "ay".

842

if prop._dbus_signature != "ay":

591

if prop._dbus_signature != u"ay":

843

592

raise ValueError

844

593

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

845

594

for byte in value))

846

595

prop(value)

847

596

848

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

849

out_signature="a{sv}")

597

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

598

out_signature=u"a{sv}")

850

599

def GetAll(self, interface_name):

851

600

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

852

601

standard.

853

602

854

603

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

855

604

"""

856

properties = {}

605

all = {}

857

606

for name, prop in self._get_all_dbus_properties():

858

607

if (interface_name

859

608

and interface_name != prop._dbus_interface):

860

609

# Interface non-empty but did not match

861

610

continue

862

611

# Ignore write-only properties

863

if prop._dbus_access == "write":

612

if prop._dbus_access == u"write":

864

613

continue

865

614

value = prop()

866

if not hasattr(value, "variant_level"):

867

properties[name] = value

615

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

616

all[name] = value

868

617

continue

869

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

870

value.variant_level+1)

871

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

618

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

619

value.variant_level+1)

620

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

872

621

873

622

@dbus.service.method(dbus.INTROSPECTABLE_IFACE,

874

out_signature="s",

623

out_signature=u"s",

875

624

path_keyword='object_path',

876

625

connection_keyword='connection')

877

626

def Introspect(self, object_path, connection):

882

631

try:

883

632

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

884

633

def make_tag(document, name, prop):

885

e = document.createElement("property")

886

e.setAttribute("name", name)

887

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

888

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

634

e = document.createElement(u"property")

635

e.setAttribute(u"name", name)

636

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

637

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

889

638

return e

890

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

639

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

891

640

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

892

641

for name, prop

893

642

in self._get_all_dbus_properties()

894

643

if prop._dbus_interface

895

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

644

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

896

645

if_tag.appendChild(tag)

897

646

# Add the names to the return values for the

898

647

# "org.freedesktop.DBus.Properties" methods

899

if (if_tag.getAttribute("name")

900

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

901

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

902

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

903

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

904

if (arg.getAttribute("direction")

905

== "out"):

906

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

907

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

908

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

909

if (arg.getAttribute("direction")

910

== "out"):

911

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

912

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

648

if (if_tag.getAttribute(u"name")

649

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

650

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

651

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

652

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

653

if (arg.getAttribute(u"direction")

654

== u"out"):

655

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

656

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

657

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

658

if (arg.getAttribute(u"direction")

659

== u"out"):

660

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

661

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

913

662

document.unlink()

914

663

except (AttributeError, xml.dom.DOMException,

915

xml.parsers.expat.ExpatError) as error:

916

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

664

xml.parsers.expat.ExpatError), error:

665

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

917

666

error)

918

667

return xmlstring

919

668

920

669

921

def datetime_to_dbus (dt, variant_level=0):

922

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

923

if dt is None:

924

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

925

return dbus.String(dt.isoformat(),

926

variant_level=variant_level)

927

928

929

class AlternateDBusNamesMetaclass(DBusObjectWithProperties

930

.__metaclass__):

931

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

932

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

933

"""

934

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

935

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

936

# methods, signals, or properties in them

937

for base in (b for b in bases

938

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

939

# Go though all attributes of the base class

940

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

941

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

942

# with the wrong interface name

943

if (not hasattr(attribute, "_dbus_interface")

944

or not attribute._dbus_interface

945

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

946

continue

947

# Create an alternate D-Bus interface name based on

948

# the current name

949

alt_interface = (attribute._dbus_interface

950

.replace("se.recompile.Mandos",

951

"se.bsnet.fukt.Mandos"))

952

# Is this a D-Bus signal?

953

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

954

# Extract the original non-method function by

955

# black magic

956

nonmethod_func = (dict(

957

zip(attribute.func_code.co_freevars,

958

attribute.__closure__))["func"]

959

.cell_contents)

960

# Create a new, but exactly alike, function

961

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

962

# with the alternate D-Bus interface name

963

new_function = (dbus.service.signal

964

(alt_interface,

965

attribute._dbus_signature)

966

(types.FunctionType(

967

nonmethod_func.func_code,

968

nonmethod_func.func_globals,

969

nonmethod_func.func_name,

970

nonmethod_func.func_defaults,

971

nonmethod_func.func_closure)))

972

# Define a creator of a function to call both the

973

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

974

# signals gets sent when the function is called

975

def fixscope(func1, func2):

976

"""This function is a scope container to pass

977

func1 and func2 to the "call_both" function

978

outside of its arguments"""

979

def call_both(*args, **kwargs):

980

"""This function will emit two D-Bus

981

signals by calling func1 and func2"""

982

func1(*args, **kwargs)

983

func2(*args, **kwargs)

984

return call_both

985

# Create the "call_both" function and add it to

986

# the class

987

attr[attrname] = fixscope(attribute,

988

new_function)

989

# Is this a D-Bus method?

990

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

991

# Create a new, but exactly alike, function

992

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

993

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

994

# to the class.

995

attr[attrname] = (dbus.service.method

996

(alt_interface,

997

attribute._dbus_in_signature,

998

attribute._dbus_out_signature)

999

(types.FunctionType

1000

(attribute.func_code,

1001

attribute.func_globals,

1002

attribute.func_name,

1003

attribute.func_defaults,

1004

attribute.func_closure)))

1005

# Is this a D-Bus property?

1006

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

1007

# Create a new, but exactly alike, function

1008

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

1009

# property with the alternate D-Bus interface

1010

# name. Add it to the class.

1011

attr[attrname] = (dbus_service_property

1012

(alt_interface,

1013

attribute._dbus_signature,

1014

attribute._dbus_access,

1015

attribute

1016

._dbus_get_args_options

1017

["byte_arrays"])

1018

(types.FunctionType

1019

(attribute.func_code,

1020

attribute.func_globals,

1021

attribute.func_name,

1022

attribute.func_defaults,

1023

attribute.func_closure)))

1024

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

1025

1026

1027

670

class ClientDBus(Client, DBusObjectWithProperties):

1028

671

"""A Client class using D-Bus

1029

672

1031

674

dbus_object_path: dbus.ObjectPath

1032

675

bus: dbus.SystemBus()

1033

676

"""

1034

1035

runtime_expansions = (Client.runtime_expansions

1036

+ ("dbus_object_path",))

1037

1038

677

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

1039

678

1040

679

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

1041

680

self.bus = bus

1042

681

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

1043

self._approvals_pending = 0

1044

1045

self._approvals_pending = 0

1046

682

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

1047

683

# the D-Bus

1048

client_object_name = unicode(self.name).translate(

1049

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

1050

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

1051

684

self.dbus_object_path = (dbus.ObjectPath

1052

("/clients/" + client_object_name))

685

(u"/clients/"

686

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

1053

687

DBusObjectWithProperties.__init__(self, self.bus,

1054

688

self.dbus_object_path)

1055

1056

def notifychangeproperty(transform_func,

1057

dbus_name, type_func=lambda x: x,

1058

variant_level=1):

1059

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

1060

its changes to DBus.

1061

1062

transform_fun: Function that takes a value and a variant_level

1063

and transforms it to a D-Bus type.

1064

dbus_name: D-Bus name of the variable

1065

type_func: Function that transform the value before sending it

1066

to the D-Bus. Default: no transform

1067

variant_level: D-Bus variant level. Default: 1

1068

"""

1069

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

1070

def setter(self, value):

1071

if hasattr(self, "dbus_object_path"):

1072

if (not hasattr(self, attrname) or

1073

type_func(getattr(self, attrname, None))

1074

!= type_func(value)):

1075

dbus_value = transform_func(type_func(value),

1076

variant_level

1077

=variant_level)

1078

self.PropertyChanged(dbus.String(dbus_name),

1079

dbus_value)

1080

setattr(self, attrname, value)

1081

1082

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

1083

1084

1085

expires = notifychangeproperty(datetime_to_dbus, "Expires")

1086

approvals_pending = notifychangeproperty(dbus.Boolean,

1087

"ApprovalPending",

1088

type_func = bool)

1089

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

1090

last_enabled = notifychangeproperty(datetime_to_dbus,

1091

"LastEnabled")

1092

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

1093

type_func = lambda checker:

1094

checker is not None)

1095

last_checked_ok = notifychangeproperty(datetime_to_dbus,

1096

"LastCheckedOK")

1097

last_approval_request = notifychangeproperty(

1098

datetime_to_dbus, "LastApprovalRequest")

1099

approved_by_default = notifychangeproperty(dbus.Boolean,

1100

"ApprovedByDefault")

1101

approval_delay = notifychangeproperty(dbus.UInt64,

1102

"ApprovalDelay",

1103

type_func =

1104

timedelta_to_milliseconds)

1105

approval_duration = notifychangeproperty(

1106

dbus.UInt64, "ApprovalDuration",

1107

type_func = timedelta_to_milliseconds)

1108

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

1109

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

1110

type_func =

1111

timedelta_to_milliseconds)

1112

extended_timeout = notifychangeproperty(

1113

dbus.UInt64, "ExtendedTimeout",

1114

type_func = timedelta_to_milliseconds)

1115

interval = notifychangeproperty(dbus.UInt64,

1116

"Interval",

1117

type_func =

1118

timedelta_to_milliseconds)

1119

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

1120

1121

del notifychangeproperty

689

690

@staticmethod

691

def _datetime_to_dbus(dt, variant_level=0):

692

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

693

return dbus.String(dt.isoformat(),

694

variant_level=variant_level)

695

696

def enable(self):

697

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

698

r = Client.enable(self)

699

if oldstate != self.enabled:

700

# Emit D-Bus signals

701

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

702

dbus.Boolean(True, variant_level=1))

703

self.PropertyChanged(

704

dbus.String(u"last_enabled"),

705

self._datetime_to_dbus(self.last_enabled,

706

variant_level=1))

707

return r

708

709

def disable(self, quiet = False):

710

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

711

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

712

if not quiet and oldstate != self.enabled:

713

# Emit D-Bus signal

714

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

715

dbus.Boolean(False, variant_level=1))

716

return r

1122

717

1123

718

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

1124

719

try:

1125

720

self.remove_from_connection()

1126

721

except LookupError:

1127

722

pass

1128

if hasattr(DBusObjectWithProperties, "__del__"):

723

if hasattr(DBusObjectWithProperties, u"__del__"):

1129

724

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

1130

725

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

1131

726

1133

728

*args, **kwargs):

1134

729

self.checker_callback_tag = None

1135

730

self.checker = None

731

# Emit D-Bus signal

732

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

733

dbus.Boolean(False, variant_level=1))

1136

734

if os.WIFEXITED(condition):

1137

735

exitstatus = os.WEXITSTATUS(condition)

1138

736

# Emit D-Bus signal

1148

746

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

1149

747

*args, **kwargs)

1150

748

749

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

750

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

751

# Emit D-Bus signal

752

self.PropertyChanged(

753

dbus.String(u"last_checked_ok"),

754

(self._datetime_to_dbus(self.last_checked_ok,

755

variant_level=1)))

756

return r

757

1151

758

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

1152

759

old_checker = self.checker

1153

760

if self.checker is not None:

1160

767

and old_checker_pid != self.checker.pid):

1161

768

# Emit D-Bus signal

1162

769

self.CheckerStarted(self.current_checker_command)

1163

return r

1164

1165

def _reset_approved(self):

1166

self.approved = None

1167

return False

1168

1169

def approve(self, value=True):

1170

self.send_changedstate()

1171

self.approved = value

1172

gobject.timeout_add(timedelta_to_milliseconds

1173

(self.approval_duration),

1174

self._reset_approved)

1175

770

self.PropertyChanged(

771

dbus.String(u"checker_running"),

772

dbus.Boolean(True, variant_level=1))

773

return r

774

775

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

776

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

777

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

778

if (old_checker is not None

779

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

780

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

781

dbus.Boolean(False, variant_level=1))

782

return r

1176

783

1177

784

## D-Bus methods, signals & properties

1178

_interface = "se.recompile.Mandos.Client"

785

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

1179

786

1180

787

## Signals

1181

788

1182

789

# CheckerCompleted - signal

1183

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

790

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

1184

791

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

1185

792

"D-Bus signal"

1186

793

pass

1187

794

1188

795

# CheckerStarted - signal

1189

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

796

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

1190

797

def CheckerStarted(self, command):

1191

798

"D-Bus signal"

1192

799

pass

1193

800

1194

801

# PropertyChanged - signal

1195

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

802

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

1196

803

def PropertyChanged(self, property, value):

1197

804

"D-Bus signal"

1198

805

pass

1200

807

# GotSecret - signal

1201

808

@dbus.service.signal(_interface)

1202

809

def GotSecret(self):

1203

"""D-Bus signal

1204

Is sent after a successful transfer of secret from the Mandos

1205

server to mandos-client

1206

"""

810

"D-Bus signal"

1207

811

pass

1208

812

1209

813

# Rejected - signal

1210

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

1211

def Rejected(self, reason):

1212

"D-Bus signal"

1213

pass

1214

1215

# NeedApproval - signal

1216

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

1217

def NeedApproval(self, timeout, default):

1218

"D-Bus signal"

1219

return self.need_approval()

1220

1221

# NeRwequest - signal

1222

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

1223

def NewRequest(self, ip):

1224

"""D-Bus signal

1225

Is sent after a client request a password.

1226

"""

814

@dbus.service.signal(_interface)

815

def Rejected(self):

816

"D-Bus signal"

1227

817

pass

1228

818

1229

819

## Methods

1230

820

1231

# Approve - method

1232

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

1233

def Approve(self, value):

1234

self.approve(value)

1235

1236

821

# CheckedOK - method

1237

822

@dbus.service.method(_interface)

1238

823

def CheckedOK(self):

1239

self.checked_ok()

824

return self.checked_ok()

1240

825

1241

826

# Enable - method

1242

827

@dbus.service.method(_interface)

1263

848

1264

849

## Properties

1265

850

1266

# ApprovalPending - property

1267

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

1268

def ApprovalPending_dbus_property(self):

1269

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

1270

1271

# ApprovedByDefault - property

1272

@dbus_service_property(_interface, signature="b",

1273

access="readwrite")

1274

def ApprovedByDefault_dbus_property(self, value=None):

1275

if value is None: # get

1276

return dbus.Boolean(self.approved_by_default)

1277

self.approved_by_default = bool(value)

1278

1279

# ApprovalDelay - property

1280

@dbus_service_property(_interface, signature="t",

1281

access="readwrite")

1282

def ApprovalDelay_dbus_property(self, value=None):

1283

if value is None: # get

1284

return dbus.UInt64(self.approval_delay_milliseconds())

1285

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

1286

1287

# ApprovalDuration - property

1288

@dbus_service_property(_interface, signature="t",

1289

access="readwrite")

1290

def ApprovalDuration_dbus_property(self, value=None):

1291

if value is None: # get

1292

return dbus.UInt64(timedelta_to_milliseconds(

1293

self.approval_duration))

1294

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

1295

1296

# Name - property

1297

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

1298

def Name_dbus_property(self):

851

# name - property

852

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

853

def name_dbus_property(self):

1299

854

return dbus.String(self.name)

1300

855

1301

# Fingerprint - property

1302

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

1303

def Fingerprint_dbus_property(self):

856

# fingerprint - property

857

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

858

def fingerprint_dbus_property(self):

1304

859

return dbus.String(self.fingerprint)

1305

860

1306

# Host - property

1307

@dbus_service_property(_interface, signature="s",

1308

access="readwrite")

1309

def Host_dbus_property(self, value=None):

861

# host - property

862

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

863

access=u"readwrite")

864

def host_dbus_property(self, value=None):

1310

865

if value is None: # get

1311

866

return dbus.String(self.host)

1312

self.host = unicode(value)

1313

1314

# Created - property

1315

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

1316

def Created_dbus_property(self):

1317

return datetime_to_dbus(self.created)

1318

1319

# LastEnabled - property

1320

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

1321

def LastEnabled_dbus_property(self):

1322

return datetime_to_dbus(self.last_enabled)

1323

1324

# Enabled - property

1325

@dbus_service_property(_interface, signature="b",

1326

access="readwrite")

1327

def Enabled_dbus_property(self, value=None):

867

self.host = value

868

# Emit D-Bus signal

869

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

870

dbus.String(value, variant_level=1))

871

872

# created - property

873

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

874

def created_dbus_property(self):

875

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

876

877

# last_enabled - property

878

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

879

def last_enabled_dbus_property(self):

880

if self.last_enabled is None:

881

return dbus.String(u"")

882

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

883

884

# enabled - property

885

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

886

access=u"readwrite")

887

def enabled_dbus_property(self, value=None):

1328

888

if value is None: # get

1329

889

return dbus.Boolean(self.enabled)

1330

890

if value:

1332

892

else:

1333

893

self.disable()

1334

894

1335

# LastCheckedOK - property

1336

@dbus_service_property(_interface, signature="s",

1337

access="readwrite")

1338

def LastCheckedOK_dbus_property(self, value=None):

895

# last_checked_ok - property

896

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

897

access=u"readwrite")

898

def last_checked_ok_dbus_property(self, value=None):

1339

899

if value is not None:

1340

900

self.checked_ok()

1341

901

return

1342

return datetime_to_dbus(self.last_checked_ok)

1343

1344

# Expires - property

1345

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

1346

def Expires_dbus_property(self):

1347

return datetime_to_dbus(self.expires)

1348

1349

# LastApprovalRequest - property

1350

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

1351

def LastApprovalRequest_dbus_property(self):

1352

return datetime_to_dbus(self.last_approval_request)

1353

1354

# Timeout - property

1355

@dbus_service_property(_interface, signature="t",

1356

access="readwrite")

1357

def Timeout_dbus_property(self, value=None):

902

if self.last_checked_ok is None:

903

return dbus.String(u"")

904

return dbus.String(self._datetime_to_dbus(self

905

.last_checked_ok))

906

907

# timeout - property

908

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

909

access=u"readwrite")

910

def timeout_dbus_property(self, value=None):

1358

911

if value is None: # get

1359

912

return dbus.UInt64(self.timeout_milliseconds())

1360

913

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

1361

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

914

# Emit D-Bus signal

915

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

916

dbus.UInt64(value, variant_level=1))

917

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

1362

918

return

1363

919

# Reschedule timeout

1364

920

gobject.source_remove(self.disable_initiator_tag)

1365

921

self.disable_initiator_tag = None

1366

self.expires = None

1367

time_to_die = timedelta_to_milliseconds((self

1368

.last_checked_ok

1369

+ self.timeout)

1370

- datetime.datetime

1371

.utcnow())

922

time_to_die = (self.

923

_timedelta_to_milliseconds((self

924

.last_checked_ok

925

+ self.timeout)

926

- datetime.datetime

927

.utcnow()))

1372

928

if time_to_die <= 0:

1373

929

# The timeout has passed

1374

930

self.disable()

1375

931

else:

1376

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

1377

+ datetime.timedelta(milliseconds =

1378

time_to_die))

1379

932

self.disable_initiator_tag = (gobject.timeout_add

1380

933

(time_to_die, self.disable))

1381

934

1382

# ExtendedTimeout - property

1383

@dbus_service_property(_interface, signature="t",

1384

access="readwrite")

1385

def ExtendedTimeout_dbus_property(self, value=None):

1386

if value is None: # get

1387

return dbus.UInt64(self.extended_timeout_milliseconds())

1388

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

1389

1390

# Interval - property

1391

@dbus_service_property(_interface, signature="t",

1392

access="readwrite")

1393

def Interval_dbus_property(self, value=None):

935

# interval - property

936

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

937

access=u"readwrite")

938

def interval_dbus_property(self, value=None):

1394

939

if value is None: # get

1395

940

return dbus.UInt64(self.interval_milliseconds())

1396

941

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

1397

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

942

# Emit D-Bus signal

943

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

944

dbus.UInt64(value, variant_level=1))

945

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

1398

946

return

1399

if self.enabled:

1400

# Reschedule checker run

1401

gobject.source_remove(self.checker_initiator_tag)

1402

self.checker_initiator_tag = (gobject.timeout_add

1403

(value, self.start_checker))

1404

self.start_checker() # Start one now, too

1405

1406

# Checker - property

1407

@dbus_service_property(_interface, signature="s",

1408

access="readwrite")

1409

def Checker_dbus_property(self, value=None):

947

# Reschedule checker run

948

gobject.source_remove(self.checker_initiator_tag)

949

self.checker_initiator_tag = (gobject.timeout_add

950

(value, self.start_checker))

951

self.start_checker() # Start one now, too

952

953

# checker - property

954

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

955

access=u"readwrite")

956

def checker_dbus_property(self, value=None):

1410

957

if value is None: # get

1411

958

return dbus.String(self.checker_command)

1412

self.checker_command = unicode(value)

959

self.checker_command = value

960

# Emit D-Bus signal

961

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

962

dbus.String(self.checker_command,

963

variant_level=1))

1413

964

1414

# CheckerRunning - property

1415

@dbus_service_property(_interface, signature="b",

1416

access="readwrite")

1417

def CheckerRunning_dbus_property(self, value=None):

965

# checker_running - property

966

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

967

access=u"readwrite")

968

def checker_running_dbus_property(self, value=None):

1418

969

if value is None: # get

1419

970

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

1420

971

if value:

1422

973

else:

1423

974

self.stop_checker()

1424

975

1425

# ObjectPath - property

1426

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

1427

def ObjectPath_dbus_property(self):

976

# object_path - property

977

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

978

def object_path_dbus_property(self):

1428

979

return self.dbus_object_path # is already a dbus.ObjectPath

1429

980

1430

# Secret = property

1431

@dbus_service_property(_interface, signature="ay",

1432

access="write", byte_arrays=True)

1433

def Secret_dbus_property(self, value):

981

# secret = property

982

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

983

access=u"write", byte_arrays=True)

984

def secret_dbus_property(self, value):

1434

985

self.secret = str(value)

1435

986

1436

987

del _interface

1437

988

1438

989

1439

class ProxyClient(object):

1440

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

1441

self._pipe = child_pipe

1442

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

1443

if not self._pipe.recv():

1444

raise KeyError()

1445

1446

def __getattribute__(self, name):

1447

if name == '_pipe':

1448

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

1449

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

1450

data = self._pipe.recv()

1451

if data[0] == 'data':

1452

return data[1]

1453

if data[0] == 'function':

1454

def func(*args, **kwargs):

1455

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

1456

return self._pipe.recv()[1]

1457

return func

1458

1459

def __setattr__(self, name, value):

1460

if name == '_pipe':

1461

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

1462

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

1463

1464

1465

class ClientDBusTransitional(ClientDBus):

1466

__metaclass__ = AlternateDBusNamesMetaclass

1467

1468

1469

990

class ClientHandler(socketserver.BaseRequestHandler, object):

1470

991

"""A class to handle client connections.

1471

992

1473

994

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

1474

995

1475

996

def handle(self):

1476

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

1477

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

1478

unicode(self.client_address))

1479

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

1480

self.server.child_pipe.fileno())

1481

997

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

998

unicode(self.client_address))

999

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

1000

self.server.child_pipe[1].fileno())

1001

# Open IPC pipe to parent process

1002

with contextlib.nested(self.server.child_pipe[1],

1003

self.server.parent_pipe[0]

1004

) as (ipc, ipc_return):

1482

1005

session = (gnutls.connection

1483

1006

.ClientSession(self.request,

1484

1007

gnutls.connection

1489

1012

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

1490

1013

# here despite using OpenPGP certificates.

1491

1014

1492

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

1493

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

1494

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

1495

# "+DHE-DSS"))

1015

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

1016

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

1017

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

1018

# u"+DHE-DSS"))

1496

1019

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

1497

1020

priority = self.server.gnutls_priority

1498

1021

if priority is None:

1499

priority = "NORMAL"

1022

priority = u"NORMAL"

1500

1023

(gnutls.library.functions

1501

1024

.gnutls_priority_set_direct(session._c_object,

1502

1025

priority, None))

1504

1027

# Start communication using the Mandos protocol

1505

1028

# Get protocol number

1506

1029

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

1507

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

1030

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

1508

1031

try:

1509

1032

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

1510

1033

raise RuntimeError

1511

except (ValueError, IndexError, RuntimeError) as error:

1512

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

1034

except (ValueError, IndexError, RuntimeError), error:

1035

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

1513

1036

return

1514

1037

1515

1038

# Start GnuTLS connection

1516

1039

try:

1517

1040

session.handshake()

1518

except gnutls.errors.GNUTLSError as error:

1519

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

1041

except gnutls.errors.GNUTLSError, error:

1042

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

1520

1043

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

1521

1044

# established. Just abandon the request.

1522

1045

return

1523

logger.debug("Handshake succeeded")

1524

1525

approval_required = False

1046

logger.debug(u"Handshake succeeded")

1526

1047

try:

1527

1048

try:

1528

1049

fpr = self.fingerprint(self.peer_certificate

1529

1050

(session))

1530

except (TypeError,

1531

gnutls.errors.GNUTLSError) as error:

1532

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

1533

return

1534

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

1535

1536

try:

1537

client = ProxyClient(child_pipe, fpr,

1538

self.client_address)

1539

except KeyError:

1540

return

1541

1542

if self.server.use_dbus:

1543

# Emit D-Bus signal

1544

client.NewRequest(str(self.client_address))

1545

1546

if client.approval_delay:

1547

delay = client.approval_delay

1548

client.approvals_pending += 1

1549

approval_required = True

1550

1551

while True:

1552

if not client.enabled:

1553

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

1554

client.name)

1555

if self.server.use_dbus:

1556

# Emit D-Bus signal

1557

client.Rejected("Disabled")

1558

return

1559

1560

if client.approved or not client.approval_delay:

1561

#We are approved or approval is disabled

1051

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

1052

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

1053

return

1054

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

1055

1056

for c in self.server.clients:

1057

if c.fingerprint == fpr:

1058

client = c

1562

1059

break

1563

elif client.approved is None:

1564

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

1565

client.name)

1566

if self.server.use_dbus:

1567

# Emit D-Bus signal

1568

client.NeedApproval(

1569

client.approval_delay_milliseconds(),

1570

client.approved_by_default)

1571

else:

1572

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

1573

client.name)

1574

if self.server.use_dbus:

1575

# Emit D-Bus signal

1576

client.Rejected("Denied")

1577

return

1578

1579

#wait until timeout or approved

1580

time = datetime.datetime.now()

1581

client.changedstate.acquire()

1582

(client.changedstate.wait

1583

(float(client.timedelta_to_milliseconds(delay)

1584

/ 1000)))

1585

client.changedstate.release()

1586

time2 = datetime.datetime.now()

1587

if (time2 - time) >= delay:

1588

if not client.approved_by_default:

1589

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

1590

" waiting for approval",

1591

client.name)

1592

if self.server.use_dbus:

1593

# Emit D-Bus signal

1594

client.Rejected("Approval timed out")

1595

return

1596

else:

1597

break

1598

else:

1599

delay -= time2 - time

1600

1060

else:

1061

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

1062

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

1063

return

1064

1065

class ClientProxy(object):

1066

"""Client proxy object. Not for calling methods."""

1067

def __init__(self, client):

1068

self.client = client

1069

def __getattr__(self, name):

1070

if name.startswith("ipc_"):

1071

def tempfunc():

1072

ipc.write("%s %s\n" % (name[4:].upper(),

1073

self.client.name))

1074

return tempfunc

1075

if not hasattr(self.client, name):

1076

raise AttributeError

1077

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

1078

% (name, self.client.fingerprint))

1079

return pickle.load(ipc_return)

1080

clientproxy = ClientProxy(client)

1081

# Have to check if client.enabled, since it is

1082

# possible that the client was disabled since the

1083

# GnuTLS session was established.

1084

if not clientproxy.enabled:

1085

clientproxy.ipc_disabled()

1086

return

1087

1088

clientproxy.ipc_sending()

1601

1089

sent_size = 0

1602

1090

while sent_size < len(client.secret):

1603

try:

1604

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

1605

except gnutls.errors.GNUTLSError as error:

1606

logger.warning("gnutls send failed")

1607

return

1608

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

1091

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

1092

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

1609

1093

sent, len(client.secret)

1610

1094

- (sent_size + sent))

1611

1095

sent_size += sent

1612

1613

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

1614

# bump the timeout using extended_timeout

1615

client.checked_ok(client.extended_timeout)

1616

if self.server.use_dbus:

1617

# Emit D-Bus signal

1618

client.GotSecret()

1619

1620

1096

finally:

1621

if approval_required:

1622

client.approvals_pending -= 1

1623

try:

1624

session.bye()

1625

except gnutls.errors.GNUTLSError as error:

1626

logger.warning("GnuTLS bye failed")

1097

session.bye()

1627

1098

1628

1099

@staticmethod

1629

1100

def peer_certificate(session):

1639

1110

.gnutls_certificate_get_peers

1640

1111

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

1641

1112

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

1642

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

1643

" certificate")

1113

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

1114

u" certificate")

1644

1115

if list_size.value == 0:

1645

1116

return None

1646

1117

cert = cert_list[0]

1672

1143

if crtverify.value != 0:

1673

1144

gnutls.library.functions.gnutls_openpgp_crt_deinit(crt)

1674

1145

raise (gnutls.errors.CertificateSecurityError

1675

("Verify failed"))

1146

(u"Verify failed"))

1676

1147

# New buffer for the fingerprint

1677

1148

buf = ctypes.create_string_buffer(20)

1678

1149

buf_len = ctypes.c_size_t()

1685

1156

# Convert the buffer to a Python bytestring

1686

1157

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

1687

1158

# Convert the bytestring to hexadecimal notation

1688

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

1159

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

1689

1160

return hex_fpr

1690

1161

1691

1162

1692

class MultiprocessingMixIn(object):

1693

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

1694

def sub_process_main(self, request, address):

1695

try:

1696

self.finish_request(request, address)

1697

except Exception:

1698

self.handle_error(request, address)

1699

self.close_request(request)

1700

1701

def process_request(self, request, address):

1702

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

1703

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

1704

args = (request,

1705

address))

1706

proc.start()

1707

return proc

1708

1709

1710

class MultiprocessingMixInWithPipe(MultiprocessingMixIn, object):

1711

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

1163

class ForkingMixInWithPipes(socketserver.ForkingMixIn, object):

1164

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

1712

1165

def process_request(self, request, client_address):

1713

1166

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

1714

1167

1715

1168

This function creates a new pipe in self.pipe

1716

1169

"""

1717

parent_pipe, self.child_pipe = multiprocessing.Pipe()

1718

1719

proc = MultiprocessingMixIn.process_request(self, request,

1720

client_address)

1721

self.child_pipe.close()

1722

self.add_pipe(parent_pipe, proc)

1723

1724

def add_pipe(self, parent_pipe, proc):

1170

# Child writes to child_pipe

1171

self.child_pipe = map(os.fdopen, os.pipe(), u"rw", (1, 0))

1172

# Parent writes to parent_pipe

1173

self.parent_pipe = map(os.fdopen, os.pipe(), u"rw", (1, 0))

1174

super(ForkingMixInWithPipes,

1175

self).process_request(request, client_address)

1176

# Close unused ends for parent

1177

self.parent_pipe[0].close() # close read end

1178

self.child_pipe[1].close() # close write end

1179

self.add_pipe_fds(self.child_pipe[0], self.parent_pipe[1])

1180

def add_pipe_fds(self, child_pipe_fd, parent_pipe_fd):

1725

1181

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

1726

raise NotImplementedError

1727

1728

1729

class IPv6_TCPServer(MultiprocessingMixInWithPipe,

1182

child_pipe_fd.close()

1183

parent_pipe_fd.close()

1184

1185

1186

class IPv6_TCPServer(ForkingMixInWithPipes,

1730

1187

socketserver.TCPServer, object):

1731

1188

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

1732

1189

1748

1205

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

1749

1206

if self.interface is not None:

1750

1207

if SO_BINDTODEVICE is None:

1751

logger.error("SO_BINDTODEVICE does not exist;"

1752

" cannot bind to interface %s",

1208

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

1209

u" cannot bind to interface %s",

1753

1210

self.interface)

1754

1211

else:

1755

1212

try:

1756

1213

self.socket.setsockopt(socket.SOL_SOCKET,

1757

1214

SO_BINDTODEVICE,

1758

1215

str(self.interface

1759

+ '\0'))

1760

except socket.error as error:

1216

+ u'\0'))

1217

except socket.error, error:

1761

1218

if error[0] == errno.EPERM:

1762

logger.error("No permission to"

1763

" bind to interface %s",

1219

logger.error(u"No permission to"

1220

u" bind to interface %s",

1764

1221

self.interface)

1765

1222

elif error[0] == errno.ENOPROTOOPT:

1766

logger.error("SO_BINDTODEVICE not available;"

1767

" cannot bind to interface %s",

1223

logger.error(u"SO_BINDTODEVICE not available;"

1224

u" cannot bind to interface %s",

1768

1225

self.interface)

1769

1226

else:

1770

1227

raise

1772

1229

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

1773

1230

if not self.server_address[0]:

1774

1231

if self.address_family == socket.AF_INET6:

1775

any_address = "::" # in6addr_any

1232

any_address = u"::" # in6addr_any

1776

1233

else:

1777

1234

any_address = socket.INADDR_ANY

1778

1235

self.server_address = (any_address,

1805

1262

self.enabled = False

1806

1263

self.clients = clients

1807

1264

if self.clients is None:

1808

self.clients = {}

1265

self.clients = set()

1809

1266

self.use_dbus = use_dbus

1810

1267

self.gnutls_priority = gnutls_priority

1811

1268

IPv6_TCPServer.__init__(self, server_address,

1815

1272

def server_activate(self):

1816

1273

if self.enabled:

1817

1274

return socketserver.TCPServer.server_activate(self)

1818

1819

1275

def enable(self):

1820

1276

self.enabled = True

1821

1822

def add_pipe(self, parent_pipe, proc):

1277

def add_pipe_fds(self, child_pipe_fd, parent_pipe_fd):

1823

1278

# Call "handle_ipc" for both data and EOF events

1824

gobject.io_add_watch(parent_pipe.fileno(),

1279

gobject.io_add_watch(child_pipe_fd.fileno(),

1825

1280

gobject.IO_IN | gobject.IO_HUP,

1826

1281

functools.partial(self.handle_ipc,

1827

parent_pipe =

1828

parent_pipe,

1829

proc = proc))

1830

1831

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

1832

proc = None, client_object=None):

1282

reply = parent_pipe_fd,

1283

sender= child_pipe_fd))

1284

def handle_ipc(self, source, condition, reply=None, sender=None):

1833

1285

condition_names = {

1834

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

1835

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

1286

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

1287

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

1836

1288

# blocking).

1837

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

1838

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

1839

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

1289

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

1290

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

1291

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

1840

1292

# broken, usually for pipes and

1841

1293

# sockets).

1842

1294

}

1844

1296

for cond, name in

1845

1297

condition_names.iteritems()

1846

1298

if cond & condition)

1847

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

1848

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

1849

# Wait for other process to exit

1850

proc.join()

1851

return False

1852

1853

# Read a request from the child

1854

request = parent_pipe.recv()

1855

command = request[0]

1856

1857

if command == 'init':

1858

fpr = request[1]

1859

address = request[2]

1860

1861

for c in self.clients.itervalues():

1862

if c.fingerprint == fpr:

1863

client = c

1864

break

1865

else:

1866

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

1867

"dress: %s", fpr, address)

1868

if self.use_dbus:

1869

# Emit D-Bus signal

1870

mandos_dbus_service.ClientNotFound(fpr,

1871

address[0])

1872

parent_pipe.send(False)

1873

return False

1874

1875

gobject.io_add_watch(parent_pipe.fileno(),

1876

gobject.IO_IN | gobject.IO_HUP,

1877

functools.partial(self.handle_ipc,

1878

parent_pipe =

1879

parent_pipe,

1880

proc = proc,

1881

client_object =

1882

client))

1883

parent_pipe.send(True)

1884

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

1885

# same fileno

1886

return False

1887

if command == 'funcall':

1888

funcname = request[1]

1889

args = request[2]

1890

kwargs = request[3]

1891

1892

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

1893

funcname)(*args,

1894

**kwargs)))

1895

1896

if command == 'getattr':

1897

attrname = request[1]

1898

if callable(client_object.__getattribute__(attrname)):

1899

parent_pipe.send(('function',))

1900

else:

1901

parent_pipe.send(('data', client_object

1902

.__getattribute__(attrname)))

1903

1904

if command == 'setattr':

1905

attrname = request[1]

1906

value = request[2]

1907

setattr(client_object, attrname, value)

1908

1299

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

1300

conditions_string)

1301

1302

# Read a line from the file object

1303

cmdline = sender.readline()

1304

if not cmdline: # Empty line means end of file

1305

# close the IPC pipes

1306

sender.close()

1307

reply.close()

1308

1309

# Stop calling this function

1310

return False

1311

1312

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

1313

1314

# Parse and act on command

1315

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

1316

1317

if cmd == u"NOTFOUND":

1318

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

1319

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

1320

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

1321

if self.use_dbus:

1322

# Emit D-Bus signal

1323

mandos_dbus_service.ClientNotFound(fpr, address)

1324

elif cmd == u"DISABLED":

1325

for client in self.clients:

1326

if client.name == args:

1327

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

1328

if self.use_dbus:

1329

# Emit D-Bus signal

1330

client.Rejected()

1331

break

1332

else:

1333

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

1334

elif cmd == u"SENDING":

1335

for client in self.clients:

1336

if client.name == args:

1337

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

1338

client.checked_ok()

1339

if self.use_dbus:

1340

# Emit D-Bus signal

1341

client.GotSecret()

1342

break

1343

else:

1344

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

1345

args)

1346

elif cmd == u"GETATTR":

1347

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

1348

for client in self.clients:

1349

if client.fingerprint == fpr:

1350

attr_value = getattr(client, attr_name, None)

1351

logger.debug("IPC reply: %r", attr_value)

1352

pickle.dump(attr_value, reply)

1353

break

1354

else:

1355

logger.error(u"Client %s on address %s requesting "

1356

u"attribute %s not found", fpr, address,

1357

attr_name)

1358

pickle.dump(None, reply)

1359

else:

1360

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

1361

1362

# Keep calling this function

1909

1363

return True

1910

1364

1911

1365

1912

1366

def string_to_delta(interval):

1913

1367

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

1914

1368

1915

>>> string_to_delta('7d')

1369

>>> string_to_delta(u'7d')

1916

1370

datetime.timedelta(7)

1917

>>> string_to_delta('60s')

1371

>>> string_to_delta(u'60s')

1918

1372

datetime.timedelta(0, 60)

1919

>>> string_to_delta('60m')

1373

>>> string_to_delta(u'60m')

1920

1374

datetime.timedelta(0, 3600)

1921

>>> string_to_delta('24h')

1375

>>> string_to_delta(u'24h')

1922

1376

datetime.timedelta(1)

1923

>>> string_to_delta('1w')

1377

>>> string_to_delta(u'1w')

1924

1378

datetime.timedelta(7)

1925

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

1379

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

1926

1380

datetime.timedelta(0, 330)

1927

1381

"""

1928

1382

timevalue = datetime.timedelta(0)

1930

1384

try:

1931

1385

suffix = unicode(s[-1])

1932

1386

value = int(s[:-1])

1933

if suffix == "d":

1387

if suffix == u"d":

1934

1388

delta = datetime.timedelta(value)

1935

elif suffix == "s":

1389

elif suffix == u"s":

1936

1390

delta = datetime.timedelta(0, value)

1937

elif suffix == "m":

1391

elif suffix == u"m":

1938

1392

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

1939

elif suffix == "h":

1393

elif suffix == u"h":

1940

1394

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

1941

elif suffix == "w":

1395

elif suffix == u"w":

1942

1396

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

1943

1397

else:

1944

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

1945

except (ValueError, IndexError) as e:

1946

raise ValueError(*(e.args))

1398

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

1399

except (ValueError, IndexError), e:

1400

raise ValueError(e.message)

1947

1401

timevalue += delta

1948

1402

return timevalue

1949

1403

1950

1404

1405

def if_nametoindex(interface):

1406

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

1407

1408

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

1409

global if_nametoindex

1410

try:

1411

if_nametoindex = (ctypes.cdll.LoadLibrary

1412

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

1413

.if_nametoindex)

1414

except (OSError, AttributeError):

1415

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

1416

def if_nametoindex(interface):

1417

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

1418

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

1419

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

1420

ifreq = fcntl.ioctl(s, SIOCGIFINDEX,

1421

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

1422

interface))

1423

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

1424

ifreq[16:20])[0]

1425

return interface_index

1426

return if_nametoindex(interface)

1427

1428

1951

1429

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

1952

1430

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

1953

1431

1956

1434

sys.exit()

1957

1435

os.setsid()

1958

1436

if not nochdir:

1959

os.chdir("/")

1437

os.chdir(u"/")

1960

1438

if os.fork():

1961

1439

sys.exit()

1962

1440

if not noclose:

1964

1442

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

1965

1443

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

1966

1444

raise OSError(errno.ENODEV,

1967

"%s not a character device"

1445

u"%s not a character device"

1968

1446

% os.path.devnull)

1969

1447

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

1970

1448

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

1978

1456

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

1979

1457

# Parsing of options, both command line and config file

1980

1458

1981

parser = argparse.ArgumentParser()

1982

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

1983

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

1984

help="show version number and exit")

1985

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

1986

help="Bind to interface IF")

1987

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

1988

help="Address to listen for requests on")

1989

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

1990

help="Port number to receive requests on")

1991

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

1992

help="Run self-test")

1993

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

1994

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

1995

" to terminal")

1996

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

1997

help="Debug level for stdout output")

1998

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

1999

" priority string (see GnuTLS documentation)")

2000

parser.add_argument("--servicename",

2001

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

2002

parser.add_argument("--configdir",

2003

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

2004

help="Directory to search for configuration"

2005

" files")

2006

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

2007

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

2008

" system bus interface")

2009

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

2010

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

2011

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

2012

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

2013

" state")

2014

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

2015

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

2016

2017

options = parser.parse_args()

1459

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

1460

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

1461

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

1462

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

1463

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

1464

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

1465

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

1466

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

1467

help=u"Run self-test")

1468

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

1469

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

1470

u" terminal")

1471

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

1472

u" priority string (see GnuTLS documentation)")

1473

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

1474

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

1475

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

1476

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

1477

help=u"Directory to search for configuration"

1478

u" files")

1479

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

1480

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

1481

u" system bus interface")

1482

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

1483

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

1484

options = parser.parse_args()[0]

2018

1485

2019

1486

if options.check:

2020

1487

import doctest

2022

1489

sys.exit()

2023

1490

2024

1491

# Default values for config file for server-global settings

2025

server_defaults = { "interface": "",

2026

"address": "",

2027

"port": "",

2028

"debug": "False",

2029

"priority":

2030

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

2031

"servicename": "Mandos",

2032

"use_dbus": "True",

2033

"use_ipv6": "True",

2034

"debuglevel": "",

2035

"restore": "True",

2036

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

1492

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

1493

u"address": u"",

1494

u"port": u"",

1495

u"debug": u"False",

1496

u"priority":

1497

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

1498

u"servicename": u"Mandos",

1499

u"use_dbus": u"True",

1500

u"use_ipv6": u"True",

2037

1501

}

2038

1502

2039

1503

# Parse config file for server-global settings

2040

1504

server_config = configparser.SafeConfigParser(server_defaults)

2041

1505

del server_defaults

2042

1506

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

2043

"mandos.conf"))

1507

u"mandos.conf"))

2044

1508

# Convert the SafeConfigParser object to a dict

2045

1509

server_settings = server_config.defaults()

2046

1510

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

2047

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

2048

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

1511

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

1512

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

2049

1513

option)

2050

1514

if server_settings["port"]:

2051

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

2052

"port")

1515

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

1516

u"port")

2053

1517

del server_config

2054

1518

2055

1519

# Override the settings from the config file with command line

2056

1520

# options, if set.

2057

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

2058

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

2059

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

2060

"statedir"):

1521

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

1522

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

1523

u"use_dbus", u"use_ipv6"):

2061

1524

value = getattr(options, option)

2062

1525

if value is not None:

2063

1526

server_settings[option] = value

2071

1534

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

2072

1535

2073

1536

# For convenience

2074

debug = server_settings["debug"]

2075

debuglevel = server_settings["debuglevel"]

2076

use_dbus = server_settings["use_dbus"]

2077

use_ipv6 = server_settings["use_ipv6"]

2078

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

2079

stored_state_file)

2080

2081

if debug:

2082

initlogger(debug, logging.DEBUG)

2083

else:

2084

if not debuglevel:

2085

initlogger(debug)

2086

else:

2087

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

2088

initlogger(debug, level)

2089

2090

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

1537

debug = server_settings[u"debug"]

1538

use_dbus = server_settings[u"use_dbus"]

1539

use_ipv6 = server_settings[u"use_ipv6"]

1540

1541

if not debug:

1542

syslogger.setLevel(logging.WARNING)

1543

console.setLevel(logging.WARNING)

1544

1545

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

2091

1546

syslogger.setFormatter(logging.Formatter

2092

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

2093

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

2094

% server_settings["servicename"]))

1547

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

1548

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

1549

% server_settings[u"servicename"]))

2095

1550

2096

1551

# Parse config file with clients

2097

client_config = configparser.SafeConfigParser(Client.client_defaults)

2098

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

2099

"clients.conf"))

1552

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

1553

u"interval": u"5m",

1554

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

1555

u"host": u"",

1556

}

1557

client_config = configparser.SafeConfigParser(client_defaults)

1558

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

1559

u"clients.conf"))

2100

1560

2101

1561

global mandos_dbus_service

2102

1562

mandos_dbus_service = None

2103

1563

2104

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

2105

server_settings["port"]),

1564

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

1565

server_settings[u"port"]),

2106

1566

ClientHandler,

2107

interface=(server_settings["interface"]

2108

or None),

1567

interface=server_settings[u"interface"],

2109

1568

use_ipv6=use_ipv6,

2110

1569

gnutls_priority=

2111

server_settings["priority"],

1570

server_settings[u"priority"],

2112

1571

use_dbus=use_dbus)

2113

if not debug:

2114

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

2115

try:

2116

pidfile = open(pidfilename, "w")

2117

except IOError:

2118

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

1572

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

1573

try:

1574

pidfile = open(pidfilename, u"w")

1575

except IOError:

1576

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

2119

1577

2120

1578

try:

2121

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

2122

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

1579

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

1580

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

2123

1581

except KeyError:

2124

1582

try:

2125

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

2126

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

1583

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

1584

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

2127

1585

except KeyError:

2128

1586

try:

2129

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

2130

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

1587

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

1588

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

2131

1589

except KeyError:

2132

1590

uid = 65534

2133

1591

gid = 65534

2134

1592

try:

2135

1593

os.setgid(gid)

2136

1594

os.setuid(uid)

2137

except OSError as error:

1595

except OSError, error:

2138

1596

if error[0] != errno.EPERM:

2139

1597

raise error

2140

1598

1599

# Enable all possible GnuTLS debugging

2141

1600

if debug:

2142

# Enable all possible GnuTLS debugging

2143

2144

1601

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

2145

1602

# - GnuTLS manual

2146

1603

gnutls.library.functions.gnutls_global_set_log_level(11)

2147

1604

2148

1605

@gnutls.library.types.gnutls_log_func

2149

1606

def debug_gnutls(level, string):

2150

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

1607

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

2151

1608

2152

1609

(gnutls.library.functions

2153

1610

.gnutls_global_set_log_function(debug_gnutls))

2154

2155

# Redirect stdin so all checkers get /dev/null

2156

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

2157

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

2158

if null > 2:

2159

os.close(null)

2160

2161

# Need to fork before connecting to D-Bus

2162

if not debug:

2163

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

2164

daemon()

2165

2166

gobject.threads_init()

2167

1611

2168

1612

global main_loop

2169

1613

# From the Avahi example code

2173

1617

# End of Avahi example code

2174

1618

if use_dbus:

2175

1619

try:

2176

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

1620

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

2177

1621

bus, do_not_queue=True)

2178

old_bus_name = (dbus.service.BusName

2179

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

2180

do_not_queue=True))

2181

except dbus.exceptions.NameExistsException as e:

2182

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

1622

except dbus.exceptions.NameExistsException, e:

1623

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

2183

1624

use_dbus = False

2184

server_settings["use_dbus"] = False

1625

server_settings[u"use_dbus"] = False

2185

1626

tcp_server.use_dbus = False

2186

1627

protocol = avahi.PROTO_INET6 if use_ipv6 else avahi.PROTO_INET

2187

service = AvahiServiceToSyslog(name =

2188

server_settings["servicename"],

2189

servicetype = "_mandos._tcp",

2190

protocol = protocol, bus = bus)

1628

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

1629

servicetype = u"_mandos._tcp",

1630

protocol = protocol, bus = bus)

2191

1631

if server_settings["interface"]:

2192

1632

service.interface = (if_nametoindex

2193

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

2194

2195

global multiprocessing_manager

2196

multiprocessing_manager = multiprocessing.Manager()

1633

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

2197

1634

2198

1635

client_class = Client

2199

1636

if use_dbus:

2200

client_class = functools.partial(ClientDBusTransitional,

2201

bus = bus)

2202

2203

client_settings = Client.config_parser(client_config)

2204

old_client_settings = {}

2205

clients_data = {}

2206

2207

# Get client data and settings from last running state.

2208

if server_settings["restore"]:

2209

try:

2210

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

2211

clients_data, old_client_settings = (pickle.load

2212

(stored_state))

2213

os.remove(stored_state_path)

2214

except IOError as e:

2215

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

2216

.format(e))

2217

if e.errno != errno.ENOENT:

2218

raise

2219

except EOFError as e:

2220

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

2221

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

2222

2223

with PGPEngine() as pgp:

2224

for client_name, client in clients_data.iteritems():

2225

# Decide which value to use after restoring saved state.

2226

# We have three different values: Old config file,

2227

# new config file, and saved state.

2228

# New config value takes precedence if it differs from old

2229

# config value, otherwise use saved state.

2230

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

2231

try:

2232

# For each value in new config, check if it

2233

# differs from the old config value (Except for

2234

# the "secret" attribute)

2235

if (name != "secret" and

2236

value != old_client_settings[client_name]

2237

[name]):

2238

client[name] = value

2239

except KeyError:

2240

pass

2241

2242

# Clients who has passed its expire date can still be

2243

# enabled if its last checker was successful. Clients

2244

# whose checker failed before we stored its state is

2245

# assumed to have failed all checkers during downtime.

2246

if client["enabled"]:

2247

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

2248

if not client["last_checked_ok"]:

2249

logger.warning(

2250

"disabling client {0} - Client never "

2251

"performed a successfull checker"

2252

.format(client["name"]))

2253

client["enabled"] = False

2254

elif client["last_checker_status"] != 0:

2255

logger.warning(

2256

"disabling client {0} - Client "

2257

"last checker failed with error code {1}"

2258

.format(client["name"],

2259

client["last_checker_status"]))

2260

client["enabled"] = False

2261

else:

2262

client["expires"] = (datetime.datetime

2263

.utcnow()

2264

+ client["timeout"])

2265

2266

try:

2267

client["secret"] = (

2268

pgp.decrypt(client["encrypted_secret"],

2269

client_settings[client_name]

2270

["secret"]))

2271

except PGPError:

2272

# If decryption fails, we use secret from new settings

2273

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

2274

.format(client_name))

2275

client["secret"] = (

2276

client_settings[client_name]["secret"])

2277

2278

2279

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

2280

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

2281

del clients_data[client_name]

2282

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

2283

clients_data[client_name] = client_settings[client_name]

2284

2285

# Create clients all clients

2286

for client_name, client in clients_data.iteritems():

2287

tcp_server.clients[client_name] = client_class(

2288

name = client_name, settings = client)

2289

1637

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

1638

tcp_server.clients.update(set(

1639

client_class(name = section,

1640

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

1641

for section in client_config.sections()))

2290

1642

if not tcp_server.clients:

2291

logger.warning("No clients defined")

2292

1643

logger.warning(u"No clients defined")

1644

1645

if debug:

1646

# Redirect stdin so all checkers get /dev/null

1647

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

1648

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

1649

if null > 2:

1650

os.close(null)

1651

else:

1652

# No console logging

1653

logger.removeHandler(console)

1654

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

1655

daemon()

1656

1657

try:

1658

with pidfile:

1659

pid = os.getpid()

1660

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

1661

del pidfile

1662

except IOError:

1663

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

1664

pidfilename, pid)

1665

except NameError:

1666

# "pidfile" was never created

1667

pass

1668

del pidfilename

1669

2293

1670

if not debug:

2294

try:

2295

with pidfile:

2296

pid = os.getpid()

2297

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

2298

del pidfile

2299

except IOError:

2300

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

2301

pidfilename, pid)

2302

except NameError:

2303

# "pidfile" was never created

2304

pass

2305

del pidfilename

2306

1671

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

2307

2308

1672

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

2309

1673

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

2310

1674

2312

1676

class MandosDBusService(dbus.service.Object):

2313

1677

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

2314

1678

def __init__(self):

2315

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

2316

_interface = "se.recompile.Mandos"

1679

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

1680

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

2317

1681

2318

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

1682

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

2319

1683

def ClientAdded(self, objpath):

2320

1684

"D-Bus signal"

2321

1685

pass

2322

1686

2323

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

1687

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

2324

1688

def ClientNotFound(self, fingerprint, address):

2325

1689

"D-Bus signal"

2326

1690

pass

2327

1691

2328

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

1692

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

2329

1693

def ClientRemoved(self, objpath, name):

2330

1694

"D-Bus signal"

2331

1695

pass

2332

1696

2333

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

1697

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

2334

1698

def GetAllClients(self):

2335

1699

"D-Bus method"

2336

1700

return dbus.Array(c.dbus_object_path

2337

for c in

2338

tcp_server.clients.itervalues())

1701

for c in tcp_server.clients)

2339

1702

2340

1703

@dbus.service.method(_interface,

2341

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

1704

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

2342

1705

def GetAllClientsWithProperties(self):

2343

1706

"D-Bus method"

2344

1707

return dbus.Dictionary(

2345

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

2346

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

2347

signature="oa{sv}")

1708

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

1709

for c in tcp_server.clients),

1710

signature=u"oa{sv}")

2348

1711

2349

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

1712

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

2350

1713

def RemoveClient(self, object_path):

2351

1714

"D-Bus method"

2352

for c in tcp_server.clients.itervalues():

1715

for c in tcp_server.clients:

2353

1716

if c.dbus_object_path == object_path:

2354

del tcp_server.clients[c.name]

1717

tcp_server.clients.remove(c)

2355

1718

c.remove_from_connection()

2356

1719

# Don't signal anything except ClientRemoved

2357

1720

c.disable(quiet=True)

2362

1725

2363

1726

del _interface

2364

1727

2365

class MandosDBusServiceTransitional(MandosDBusService):

2366

__metaclass__ = AlternateDBusNamesMetaclass

2367

mandos_dbus_service = MandosDBusServiceTransitional()

1728

mandos_dbus_service = MandosDBusService()

2368

1729

2369

1730

def cleanup():

2370

1731

"Cleanup function; run on exit"

2371

1732

service.cleanup()

2372

1733

2373

multiprocessing.active_children()

2374

if not (tcp_server.clients or client_settings):

2375

return

2376

2377

# Store client before exiting. Secrets are encrypted with key

2378

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

2379

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

2380

clients = {}

2381

with PGPEngine() as pgp:

2382

for client in tcp_server.clients.itervalues():

2383

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

2384

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

2385

key)

2386

client_dict = {}

2387

2388

# A list of attributes that can not be pickled

2389

# + secret.

2390

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

2391

"checker"))

2392

for name, typ in (inspect.getmembers

2393

(dbus.service.Object)):

2394

exclude.add(name)

2395

2396

client_dict["encrypted_secret"] = (client

2397

.encrypted_secret)

2398

for attr in client.client_structure:

2399

if attr not in exclude:

2400

client_dict[attr] = getattr(client, attr)

2401

2402

clients[client.name] = client_dict

2403

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

2404

2405

try:

2406

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

2407

prefix="clients-",

2408

dir=os.path.dirname

2409

(stored_state_path))

2410

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

2411

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

2412

os.rename(tempname, stored_state_path)

2413

except (IOError, OSError) as e:

2414

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

2415

.format(e))

2416

if not debug:

2417

try:

2418

os.remove(tempname)

2419

except NameError:

2420

pass

2421

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

2422

errno.EEXIST)):

2423

raise e

2424

2425

# Delete all clients, and settings from config

2426

1734

while tcp_server.clients:

2427

name, client = tcp_server.clients.popitem()

1735

client = tcp_server.clients.pop()

2428

1736

if use_dbus:

2429

1737

client.remove_from_connection()

1738

client.disable_hook = None

2430

1739

# Don't signal anything except ClientRemoved

2431

1740

client.disable(quiet=True)

2432

1741

if use_dbus:

2433

1742

# Emit D-Bus signal

2434

mandos_dbus_service.ClientRemoved(client

2435

.dbus_object_path,

1743

mandos_dbus_service.ClientRemoved(client.dbus_object_path,

2436

1744

client.name)

2437

client_settings.clear()

2438

1745

2439

1746

atexit.register(cleanup)

2440

1747

2441

for client in tcp_server.clients.itervalues():

1748

for client in tcp_server.clients:

2442

1749

if use_dbus:

2443

1750

# Emit D-Bus signal

2444

1751

mandos_dbus_service.ClientAdded(client.dbus_object_path)

2445

# Need to initiate checking of clients

2446

if client.enabled:

2447

client.init_checker()

1752

client.enable()

2448

1753

2449

1754

tcp_server.enable()

2450

1755

tcp_server.server_activate()

2452

1757

# Find out what port we got

2453

1758

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

2454

1759

if use_ipv6:

2455

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

1760

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

2456

1761

" flowinfo %d, scope_id %d"

2457

1762

% tcp_server.socket.getsockname())

2458

1763

else: # IPv4

2459

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

1764

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

2460

1765

% tcp_server.socket.getsockname())

2461

1766

2462

1767

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

2465

1770

# From the Avahi example code

2466

1771

try:

2467

1772

service.activate()

2468

except dbus.exceptions.DBusException as error:

2469

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

1773

except dbus.exceptions.DBusException, error:

1774

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

2470

1775

cleanup()

2471

1776

sys.exit(1)

2472

1777

# End of Avahi example code

2476

1781

(tcp_server.handle_request

2477

1782

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

2478

1783

2479

logger.debug("Starting main loop")

1784

logger.debug(u"Starting main loop")

2480

1785

main_loop.run()

2481

except AvahiError as error:

2482

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

1786

except AvahiError, error:

1787

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

2483

1788

cleanup()

2484

1789

sys.exit(1)

2485

1790

except KeyboardInterrupt:

2486

1791

if debug:

2487

print("", file=sys.stderr)

2488

logger.debug("Server received KeyboardInterrupt")

2489

logger.debug("Server exiting")

1792

print >> sys.stderr

1793

logger.debug(u"Server received KeyboardInterrupt")

1794

logger.debug(u"Server exiting")

2490

1795

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

2491

1796

cleanup()

2492

1797