/mandos/release : revision 24.1.163

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

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#

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# Everything else is

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#

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

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

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# along with this program. If not, see

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

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#

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

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

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#

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from __future__ import (division, absolute_import, print_function,

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unicode_literals)

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from __future__ import division, with_statement, absolute_import

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import SocketServer as socketserver

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import socket

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import argparse

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import optparse

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import datetime

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import errno

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import gnutls.crypto

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import functools

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import cPickle as pickle

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import multiprocessing

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import types

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import binascii

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import tempfile

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import dbus

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import dbus.service

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import ctypes.util

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import xml.dom.minidom

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import inspect

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import GnuPGInterface

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try:

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SO_BINDTODEVICE = socket.SO_BINDTODEVICE

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except ImportError:

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SO_BINDTODEVICE = None

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version = "1.4.1"

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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.getLogger(u'mandos')

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logger = logging.Logger(u'mandos')

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syslogger = (logging.handlers.SysLogHandler

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(facility = logging.handlers.SysLogHandler.LOG_DAEMON,

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

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try:

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if_nametoindex = (ctypes.cdll.LoadLibrary

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

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.if_nametoindex)

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except (OSError, AttributeError):

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def if_nametoindex(interface):

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

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

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

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ifreq = fcntl.ioctl(s, SIOCGIFINDEX,

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

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interface))

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

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ifreq[16:20])[0]

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return interface_index

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def initlogger(debug, level=logging.WARNING):

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"""init logger and add loglevel"""

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syslogger.setFormatter(logging.Formatter

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

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' %(message)s'))

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logger.addHandler(syslogger)

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if debug:

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console = logging.StreamHandler()

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

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' [%(process)d]:'

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' %(levelname)s:'

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' %(message)s'))

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logger.addHandler(console)

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logger.setLevel(level)

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class PGPError(Exception):

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

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pass

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class PGPEngine(object):

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

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def __init__(self):

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self.gnupg = GnuPGInterface.GnuPG()

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

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self.gnupg = GnuPGInterface.GnuPG()

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self.gnupg.options.meta_interactive = False

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self.gnupg.options.homedir = self.tempdir

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

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'--quiet',

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'--no-use-agent'])

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def __enter__(self):

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return self

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

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self._cleanup()

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return False

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def __del__(self):

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self._cleanup()

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def _cleanup(self):

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if self.tempdir is not None:

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# Delete contents of tempdir

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

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topdown = False):

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for filename in files:

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

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for dirname in dirs:

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

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# Remove tempdir

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os.rmdir(self.tempdir)

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self.tempdir = None

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def password_encode(self, password):

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

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

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

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def encrypt(self, data, password):

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

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with open(os.devnull) as devnull:

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try:

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

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

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attach_fhs={'stderr': devnull})

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

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f.write(data)

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

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ciphertext = f.read()

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proc.wait()

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except IOError as e:

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raise PGPError(e)

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self.gnupg.passphrase = None

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return ciphertext

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def decrypt(self, data, password):

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

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with open(os.devnull) as devnull:

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try:

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

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

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attach_fhs={'stderr': devnull})

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

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f.write(data)

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

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decrypted_plaintext = f.read()

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proc.wait()

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except IOError as e:

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raise PGPError(e)

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self.gnupg.passphrase = None

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return decrypted_plaintext

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address = "/dev/log"))

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syslogger.setFormatter(logging.Formatter

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

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u' %(message)s'))

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logger.addHandler(syslogger)

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console = logging.StreamHandler()

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

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u' %(levelname)s:'

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u' %(message)s'))

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logger.addHandler(console)

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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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raise AvahiServiceError(u"Too many renames")

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

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

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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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except dbus.exceptions.DBusException, error:

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

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self.cleanup()

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os._exit(1)

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self.rename_count += 1

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def remove(self):

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

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if self.entry_group_state_changed_match is not None:

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self.entry_group_state_changed_match.remove()

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self.entry_group_state_changed_match = None

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if self.group is not None:

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self.group.Reset()

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def add(self):

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

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self.remove()

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if self.group is None:

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self.group = dbus.Interface(

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self.bus.get_object(avahi.DBUS_NAME,

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self.server.EntryGroupNew()),

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avahi.DBUS_INTERFACE_ENTRY_GROUP)

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

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if state == avahi.SERVER_COLLISION:

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

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self.remove()

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elif state == avahi.SERVER_RUNNING:

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self.add()

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else:

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if error is None:

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

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else:

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

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def activate(self):

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

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if self.server is None:

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self.server = dbus.Interface(

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self.bus.get_object(avahi.DBUS_NAME,

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avahi.DBUS_PATH_SERVER,

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follow_name_owner_changes=True),

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avahi.DBUS_PATH_SERVER),

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avahi.DBUS_INTERFACE_SERVER)

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self.server.connect_to_signal("StateChanged",

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self.server.connect_to_signal(u"StateChanged",

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self.server_state_changed)

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

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class AvahiServiceToSyslog(AvahiService):

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def rename(self):

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

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ret = AvahiService.rename(self)

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syslogger.setFormatter(logging.Formatter

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

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

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% self.name))

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return ret

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def timedelta_to_milliseconds(td):

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"Convert a datetime.timedelta() to milliseconds"

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

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+ (td.seconds * 1000)

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+ (td.microseconds // 1000))

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class Client(object):

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

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Attributes:

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

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

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

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D-Bus identifiers

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

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uniquely identify the client

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

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host: string; available for use by the checker command

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

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last_enabled: datetime.datetime(); (UTC)

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enabled: bool()

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

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

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until this client is disabled

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

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

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

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to see if the client lives.

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'None' if no process is running.

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checker_callback_tag: a gobject event source tag, or None

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checker_command: string; External command which is run to check

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if client lives. %() expansions are done at

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checker_initiator_tag: a gobject event source tag, or None

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disable_initiator_tag: - '' -

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checker_callback_tag: - '' -

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

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client lives. %() expansions are done at

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

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

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checker_initiator_tag: a gobject event source tag, or None

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

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client_structure: Object describing what attributes a client has

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and is used for storing the client at exit

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current_checker_command: string; current running checker_command

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disable_initiator_tag: a gobject event source tag, or None

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enabled: bool()

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

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uniquely identify the client

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host: string; available for use by the checker command

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

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

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

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last_checker_status: integer between 0 and 255 reflecting exit

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status of last checker. -1 reflects crashed

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checker, or None.

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

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D-Bus identifiers

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

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

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until this client is disabled

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extended_timeout: extra long timeout when password has been sent

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runtime_expansions: Allowed attributes for runtime expansion.

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

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disabled, or None

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

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

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

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"""

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runtime_expansions = ("approval_delay", "approval_duration",

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

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

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

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

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"extended_timeout": "15m",

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"interval": "2m",

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

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"host": "",

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"approval_delay": "0s",

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"approval_duration": "1s",

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"approved_by_default": "True",

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"enabled": "True",

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}

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@staticmethod

274

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):

455

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"Return the 'interval' attribute in milliseconds"

456

return timedelta_to_milliseconds(self.interval)

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return self._timedelta_to_milliseconds(self.interval)

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def approved_delay_milliseconds(self):

289

return self._timedelta_to_milliseconds(self.approved_delay)

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def approval_delay_milliseconds(self):

459

return timedelta_to_milliseconds(self.approval_delay)

460

461

@staticmethod

462

def config_parser(config):

463

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

464

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

465

with exceptions for any special settings as defined above.

466

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

467

value given the same arguments.

468

"""

469

settings = {}

470

for client_name in config.sections():

471

section = dict(config.items(client_name))

472

client = settings[client_name] = {}

473

474

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

475

# Reformat values from string types to Python types

476

client["approved_by_default"] = config.getboolean(

477

client_name, "approved_by_default")

478

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

479

"enabled")

480

481

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

482

.replace(" ", ""))

483

if "secret" in section:

484

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

485

elif "secfile" in section:

486

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

487

(section["secfile"])),

488

"rb") as secfile:

489

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

490

else:

491

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

492

% section)

493

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

494

client["extended_timeout"] = string_to_delta(

495

section["extended_timeout"])

496

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

497

client["approval_delay"] = string_to_delta(

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section["approval_delay"])

499

client["approval_duration"] = string_to_delta(

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section["approval_duration"])

501

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

502

client["last_approval_request"] = None

503

client["last_checked_ok"] = None

504

client["last_checker_status"] = None

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506

return settings

507

508

509

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

291

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

510

292

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

511

293

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

512

294

attribute."""

513

295

self.name = name

514

# adding all client settings

515

for setting, value in settings.iteritems():

516

setattr(self, setting, value)

517

518

if self.enabled:

519

if not hasattr(self, "last_enabled"):

520

self.last_enabled = datetime.datetime.utcnow()

521

if not hasattr(self, "expires"):

522

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

523

+ self.timeout)

524

else:

525

self.last_enabled = None

526

self.expires = None

527

528

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

296

if config is None:

297

config = {}

298

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

529

299

# Uppercase and remove spaces from fingerprint for later

530

300

# comparison purposes with return value from the fingerprint()

531

301

# function

532

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

533

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

534

datetime.datetime.utcnow())

535

536

# attributes specific for this server instance

302

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

303

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

304

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

305

if u"secret" in config:

306

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

307

elif u"secfile" in config:

308

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

309

(config[u"secfile"])),

310

"rb") as secfile:

311

self.secret = secfile.read()

312

else:

313

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

314

% self.name)

315

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

316

self.created = datetime.datetime.utcnow()

317

self.enabled = False

318

self.last_enabled = None

319

self.last_checked_ok = None

320

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

321

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

322

self.disable_hook = disable_hook

537

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self.checker = None

538

324

self.checker_initiator_tag = None

539

325

self.disable_initiator_tag = None

540

326

self.checker_callback_tag = None

327

self.checker_command = config[u"checker"]

541

328

self.current_checker_command = None

542

self.approved = None

329

self.last_connect = None

330

self._approved = None

331

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

332

True)

543

333

self.approvals_pending = 0

544

self.changedstate = (multiprocessing_manager

545

.Condition(multiprocessing_manager

546

.Lock()))

547

self.client_structure = [attr for attr in

548

self.__dict__.iterkeys()

549

if not attr.startswith("_")]

550

self.client_structure.append("client_structure")

551

552

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

553

lambda obj:

554

isinstance(obj,

555

property)):

556

if not name.startswith("_"):

557

self.client_structure.append(name)

334

self.approved_delay = string_to_delta(

335

config[u"approved_delay"])

336

self.approved_duration = string_to_delta(

337

config[u"approved_duration"])

338

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

558

339

559

# Send notice to process children that client state has changed

560

340

def send_changedstate(self):

561

with self.changedstate:

562

self.changedstate.notify_all()

563

341

self.changedstate.acquire()

342

self.changedstate.notify_all()

343

self.changedstate.release()

344

564

345

def enable(self):

565

346

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

566

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

347

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

567

348

# Already enabled

568

349

return

569

350

self.send_changedstate()

570

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

571

self.enabled = True

572

351

self.last_enabled = datetime.datetime.utcnow()

573

self.init_checker()

574

575

def disable(self, quiet=True):

576

"""Disable this client."""

577

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

578

return False

579

if not quiet:

580

self.send_changedstate()

581

if not quiet:

582

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

583

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

584

gobject.source_remove(self.disable_initiator_tag)

585

self.disable_initiator_tag = None

586

self.expires = None

587

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

588

gobject.source_remove(self.checker_initiator_tag)

589

self.checker_initiator_tag = None

590

self.stop_checker()

591

self.enabled = False

592

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

593

return False

594

595

def __del__(self):

596

self.disable()

597

598

def init_checker(self):

599

352

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

600

353

# and every interval from then on.

601

354

self.checker_initiator_tag = (gobject.timeout_add

605

358

self.disable_initiator_tag = (gobject.timeout_add

606

359

(self.timeout_milliseconds(),

607

360

self.disable))

361

self.enabled = True

608

362

# Also start a new checker *right now*.

609

363

self.start_checker()

610

364

365

def disable(self, quiet=True):

366

"""Disable this client."""

367

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

368

return False

369

if not quiet:

370

self.send_changedstate()

371

if not quiet:

372

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

373

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

374

gobject.source_remove(self.disable_initiator_tag)

375

self.disable_initiator_tag = None

376

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

377

gobject.source_remove(self.checker_initiator_tag)

378

self.checker_initiator_tag = None

379

self.stop_checker()

380

if self.disable_hook:

381

self.disable_hook(self)

382

self.enabled = False

383

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

384

return False

385

386

def __del__(self):

387

self.disable_hook = None

388

self.disable()

389

611

390

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

612

391

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

613

392

self.checker_callback_tag = None

614

393

self.checker = None

615

394

if os.WIFEXITED(condition):

616

self.last_checker_status = os.WEXITSTATUS(condition)

617

if self.last_checker_status == 0:

618

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

395

exitstatus = os.WEXITSTATUS(condition)

396

if exitstatus == 0:

397

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

619

398

vars(self))

620

399

self.checked_ok()

621

400

else:

622

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

401

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

623

402

vars(self))

624

403

else:

625

self.last_checker_status = -1

626

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

404

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

627

405

vars(self))

628

406

629

def checked_ok(self, timeout=None):

407

def checked_ok(self):

630

408

"""Bump up the timeout for this client.

631

409

632

410

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

633

411

alive and well.

634

412

"""

635

if timeout is None:

636

timeout = self.timeout

637

413

self.last_checked_ok = datetime.datetime.utcnow()

638

if self.disable_initiator_tag is not None:

639

gobject.source_remove(self.disable_initiator_tag)

640

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

641

self.disable_initiator_tag = (gobject.timeout_add

642

(timedelta_to_milliseconds

643

(timeout), self.disable))

644

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

645

646

def need_approval(self):

647

self.last_approval_request = datetime.datetime.utcnow()

414

gobject.source_remove(self.disable_initiator_tag)

415

self.disable_initiator_tag = (gobject.timeout_add

416

(self.timeout_milliseconds(),

417

self.disable))

648

418

649

419

def start_checker(self):

650

420

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

663

433

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

664

434

try:

665

435

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

666

except (AttributeError, OSError) as error:

436

except (AttributeError, OSError), error:

667

437

if (isinstance(error, OSError)

668

438

and error.errno != errno.ECHILD):

669

439

raise error

670

440

else:

671

441

if pid:

672

logger.warning("Checker was a zombie")

442

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

673

443

gobject.source_remove(self.checker_callback_tag)

674

444

self.checker_callback(pid, status,

675

445

self.current_checker_command)

680

450

command = self.checker_command % self.host

681

451

except TypeError:

682

452

# Escape attributes for the shell

683

escaped_attrs = dict(

684

(attr,

685

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

686

errors=

687

'replace')))

688

for attr in

689

self.runtime_expansions)

690

453

escaped_attrs = dict((key,

454

re.escape(unicode(str(val),

455

errors=

456

u'replace')))

457

for key, val in

458

vars(self).iteritems())

691

459

try:

692

460

command = self.checker_command % escaped_attrs

693

except TypeError as error:

694

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

695

' %s', self.checker_command, error)

461

except TypeError, error:

462

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

463

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

696

464

return True # Try again later

697

465

self.current_checker_command = command

698

466

try:

699

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

467

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

700

468

command, self.name)

701

469

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

702

470

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

704

472

# always replaced by /dev/null.)

705

473

self.checker = subprocess.Popen(command,

706

474

close_fds=True,

707

shell=True, cwd="/")

475

shell=True, cwd=u"/")

708

476

self.checker_callback_tag = (gobject.child_watch_add

709

477

(self.checker.pid,

710

478

self.checker_callback,

715

483

if pid:

716

484

gobject.source_remove(self.checker_callback_tag)

717

485

self.checker_callback(pid, status, command)

718

except OSError as error:

719

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

486

except OSError, error:

487

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

720

488

error)

721

489

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

722

490

return True

726

494

if self.checker_callback_tag:

727

495

gobject.source_remove(self.checker_callback_tag)

728

496

self.checker_callback_tag = None

729

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

497

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

730

498

return

731

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

499

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

732

500

try:

733

501

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

734

502

#time.sleep(0.5)

735

503

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

736

504

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

737

except OSError as error:

505

except OSError, error:

738

506

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

739

507

raise

740

508

self.checker = None

741

509

742

743

def dbus_service_property(dbus_interface, signature="v",

744

access="readwrite", byte_arrays=False):

510

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

511

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

745

512

"""Decorators for marking methods of a DBusObjectWithProperties to

746

513

become properties on the D-Bus.

747

514

754

521

"""

755

522

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

756

523

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

757

if byte_arrays and signature != "ay":

758

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

759

" signature %r" % signature)

524

if byte_arrays and signature != u"ay":

525

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

526

u" signature %r" % signature)

760

527

def decorator(func):

761

528

func._dbus_is_property = True

762

529

func._dbus_interface = dbus_interface

763

530

func._dbus_signature = signature

764

531

func._dbus_access = access

765

532

func._dbus_name = func.__name__

766

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

533

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

767

534

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

768

func._dbus_get_args_options = {'byte_arrays': byte_arrays }

535

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

769

536

return func

770

537

return decorator

771

538

791

558

792

559

class DBusObjectWithProperties(dbus.service.Object):

793

560

"""A D-Bus object with properties.

794

561

795

562

Classes inheriting from this can use the dbus_service_property

796

563

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

797

564

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

799

566

800

567

@staticmethod

801

568

def _is_dbus_property(obj):

802

return getattr(obj, "_dbus_is_property", False)

569

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

803

570

804

571

def _get_all_dbus_properties(self):

805

572

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

806

573

"""

807

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

808

for cls in self.__class__.__mro__

574

return ((prop._dbus_name, prop)

809

575

for name, prop in

810

inspect.getmembers(cls, self._is_dbus_property))

576

inspect.getmembers(self, self._is_dbus_property))

811

577

812

578

def _get_dbus_property(self, interface_name, property_name):

813

579

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

814

580

property with the specified name and interface.

815

581

"""

816

for cls in self.__class__.__mro__:

817

for name, value in (inspect.getmembers

818

(cls, self._is_dbus_property)):

819

if (value._dbus_name == property_name

820

and value._dbus_interface == interface_name):

821

return value.__get__(self)

822

582

for name in (property_name,

583

property_name + u"_dbus_property"):

584

prop = getattr(self, name, None)

585

if (prop is None

586

or not self._is_dbus_property(prop)

587

or prop._dbus_name != property_name

588

or (interface_name and prop._dbus_interface

589

and interface_name != prop._dbus_interface)):

590

continue

591

return prop

823

592

# No such property

824

raise DBusPropertyNotFound(self.dbus_object_path + ":"

825

+ interface_name + "."

593

raise DBusPropertyNotFound(self.dbus_object_path + u":"

594

+ interface_name + u"."

826

595

+ property_name)

827

596

828

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

829

out_signature="v")

597

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

598

out_signature=u"v")

830

599

def Get(self, interface_name, property_name):

831

600

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

832

601

"""

833

602

prop = self._get_dbus_property(interface_name, property_name)

834

if prop._dbus_access == "write":

603

if prop._dbus_access == u"write":

835

604

raise DBusPropertyAccessException(property_name)

836

605

value = prop()

837

if not hasattr(value, "variant_level"):

606

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

838

607

return value

839

608

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

840

609

841

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

610

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

842

611

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

843

612

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

844

613

"""

845

614

prop = self._get_dbus_property(interface_name, property_name)

846

if prop._dbus_access == "read":

615

if prop._dbus_access == u"read":

847

616

raise DBusPropertyAccessException(property_name)

848

if prop._dbus_get_args_options["byte_arrays"]:

617

if prop._dbus_get_args_options[u"byte_arrays"]:

849

618

# The byte_arrays option is not supported yet on

850

619

# signatures other than "ay".

851

if prop._dbus_signature != "ay":

620

if prop._dbus_signature != u"ay":

852

621

raise ValueError

853

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

854

for byte in value))

622

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

623

for byte in value))

855

624

prop(value)

856

625

857

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

858

out_signature="a{sv}")

626

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

627

out_signature=u"a{sv}")

859

628

def GetAll(self, interface_name):

860

629

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

861

630

standard.

862

631

863

632

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

864

633

"""

865

properties = {}

634

all = {}

866

635

for name, prop in self._get_all_dbus_properties():

867

636

if (interface_name

868

637

and interface_name != prop._dbus_interface):

869

638

# Interface non-empty but did not match

870

639

continue

871

640

# Ignore write-only properties

872

if prop._dbus_access == "write":

641

if prop._dbus_access == u"write":

873

642

continue

874

643

value = prop()

875

if not hasattr(value, "variant_level"):

876

properties[name] = value

644

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

645

all[name] = value

877

646

continue

878

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

879

value.variant_level+1)

880

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

647

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

648

value.variant_level+1)

649

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

881

650

882

651

@dbus.service.method(dbus.INTROSPECTABLE_IFACE,

883

out_signature="s",

652

out_signature=u"s",

884

653

path_keyword='object_path',

885

654

connection_keyword='connection')

886

655

def Introspect(self, object_path, connection):

891

660

try:

892

661

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

893

662

def make_tag(document, name, prop):

894

e = document.createElement("property")

895

e.setAttribute("name", name)

896

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

897

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

663

e = document.createElement(u"property")

664

e.setAttribute(u"name", name)

665

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

666

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

898

667

return e

899

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

668

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

900

669

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

901

670

for name, prop

902

671

in self._get_all_dbus_properties()

903

672

if prop._dbus_interface

904

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

673

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

905

674

if_tag.appendChild(tag)

906

675

# Add the names to the return values for the

907

676

# "org.freedesktop.DBus.Properties" methods

908

if (if_tag.getAttribute("name")

909

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

910

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

911

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

912

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

913

if (arg.getAttribute("direction")

914

== "out"):

915

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

916

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

917

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

918

if (arg.getAttribute("direction")

919

== "out"):

920

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

921

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

677

if (if_tag.getAttribute(u"name")

678

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

679

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

680

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

681

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

682

if (arg.getAttribute(u"direction")

683

== u"out"):

684

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

685

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

686

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

687

if (arg.getAttribute(u"direction")

688

== u"out"):

689

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

690

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

922

691

document.unlink()

923

692

except (AttributeError, xml.dom.DOMException,

924

xml.parsers.expat.ExpatError) as error:

925

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

693

xml.parsers.expat.ExpatError), error:

694

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

926

695

error)

927

696

return xmlstring

928

697

929

698

930

def datetime_to_dbus (dt, variant_level=0):

931

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

932

if dt is None:

933

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

934

return dbus.String(dt.isoformat(),

935

variant_level=variant_level)

936

937

938

class AlternateDBusNamesMetaclass(DBusObjectWithProperties

939

.__metaclass__):

940

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

941

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

942

"""

943

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

944

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

945

# methods, signals, or properties in them

946

for base in (b for b in bases

947

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

948

# Go though all attributes of the base class

949

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

950

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

951

# with the wrong interface name

952

if (not hasattr(attribute, "_dbus_interface")

953

or not attribute._dbus_interface

954

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

955

continue

956

# Create an alternate D-Bus interface name based on

957

# the current name

958

alt_interface = (attribute._dbus_interface

959

.replace("se.recompile.Mandos",

960

"se.bsnet.fukt.Mandos"))

961

# Is this a D-Bus signal?

962

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

963

# Extract the original non-method function by

964

# black magic

965

nonmethod_func = (dict(

966

zip(attribute.func_code.co_freevars,

967

attribute.__closure__))["func"]

968

.cell_contents)

969

# Create a new, but exactly alike, function

970

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

971

# with the alternate D-Bus interface name

972

new_function = (dbus.service.signal

973

(alt_interface,

974

attribute._dbus_signature)

975

(types.FunctionType(

976

nonmethod_func.func_code,

977

nonmethod_func.func_globals,

978

nonmethod_func.func_name,

979

nonmethod_func.func_defaults,

980

nonmethod_func.func_closure)))

981

# Define a creator of a function to call both the

982

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

983

# signals gets sent when the function is called

984

def fixscope(func1, func2):

985

"""This function is a scope container to pass

986

func1 and func2 to the "call_both" function

987

outside of its arguments"""

988

def call_both(*args, **kwargs):

989

"""This function will emit two D-Bus

990

signals by calling func1 and func2"""

991

func1(*args, **kwargs)

992

func2(*args, **kwargs)

993

return call_both

994

# Create the "call_both" function and add it to

995

# the class

996

attr[attrname] = fixscope(attribute,

997

new_function)

998

# Is this a D-Bus method?

999

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

1000

# Create a new, but exactly alike, function

1001

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

1002

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

1003

# to the class.

1004

attr[attrname] = (dbus.service.method

1005

(alt_interface,

1006

attribute._dbus_in_signature,

1007

attribute._dbus_out_signature)

1008

(types.FunctionType

1009

(attribute.func_code,

1010

attribute.func_globals,

1011

attribute.func_name,

1012

attribute.func_defaults,

1013

attribute.func_closure)))

1014

# Is this a D-Bus property?

1015

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

1016

# Create a new, but exactly alike, function

1017

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

1018

# property with the alternate D-Bus interface

1019

# name. Add it to the class.

1020

attr[attrname] = (dbus_service_property

1021

(alt_interface,

1022

attribute._dbus_signature,

1023

attribute._dbus_access,

1024

attribute

1025

._dbus_get_args_options

1026

["byte_arrays"])

1027

(types.FunctionType

1028

(attribute.func_code,

1029

attribute.func_globals,

1030

attribute.func_name,

1031

attribute.func_defaults,

1032

attribute.func_closure)))

1033

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

1034

1035

1036

699

class ClientDBus(Client, DBusObjectWithProperties):

1037

700

"""A Client class using D-Bus

1038

701

1040

703

dbus_object_path: dbus.ObjectPath

1041

704

bus: dbus.SystemBus()

1042

705

"""

1043

1044

runtime_expansions = (Client.runtime_expansions

1045

+ ("dbus_object_path",))

1046

1047

706

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

1048

707

1049

708

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

709

self._approvals_pending = 0

1050

710

self.bus = bus

1051

711

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

1052

self._approvals_pending = 0

1053

1054

self._approvals_pending = 0

1055

712

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

1056

713

# the D-Bus

1057

client_object_name = unicode(self.name).translate(

1058

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

1059

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

1060

714

self.dbus_object_path = (dbus.ObjectPath

1061

("/clients/" + client_object_name))

715

(u"/clients/"

716

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

1062

717

DBusObjectWithProperties.__init__(self, self.bus,

1063

718

self.dbus_object_path)

1064

1065

def notifychangeproperty(transform_func,

1066

dbus_name, type_func=lambda x: x,

1067

variant_level=1):

1068

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

1069

its changes to DBus.

1070

1071

transform_fun: Function that takes a value and a variant_level

1072

and transforms it to a D-Bus type.

1073

dbus_name: D-Bus name of the variable

1074

type_func: Function that transform the value before sending it

1075

to the D-Bus. Default: no transform

1076

variant_level: D-Bus variant level. Default: 1

1077

"""

1078

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

1079

def setter(self, value):

1080

if hasattr(self, "dbus_object_path"):

1081

if (not hasattr(self, attrname) or

1082

type_func(getattr(self, attrname, None))

1083

!= type_func(value)):

1084

dbus_value = transform_func(type_func(value),

1085

variant_level

1086

=variant_level)

1087

self.PropertyChanged(dbus.String(dbus_name),

1088

dbus_value)

1089

setattr(self, attrname, value)

1090

1091

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

1092

1093

1094

expires = notifychangeproperty(datetime_to_dbus, "Expires")

1095

approvals_pending = notifychangeproperty(dbus.Boolean,

1096

"ApprovalPending",

1097

type_func = bool)

1098

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

1099

last_enabled = notifychangeproperty(datetime_to_dbus,

1100

"LastEnabled")

1101

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

1102

type_func = lambda checker:

1103

checker is not None)

1104

last_checked_ok = notifychangeproperty(datetime_to_dbus,

1105

"LastCheckedOK")

1106

last_approval_request = notifychangeproperty(

1107

datetime_to_dbus, "LastApprovalRequest")

1108

approved_by_default = notifychangeproperty(dbus.Boolean,

1109

"ApprovedByDefault")

1110

approval_delay = notifychangeproperty(dbus.UInt64,

1111

"ApprovalDelay",

1112

type_func =

1113

timedelta_to_milliseconds)

1114

approval_duration = notifychangeproperty(

1115

dbus.UInt64, "ApprovalDuration",

1116

type_func = timedelta_to_milliseconds)

1117

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

1118

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

1119

type_func =

1120

timedelta_to_milliseconds)

1121

extended_timeout = notifychangeproperty(

1122

dbus.UInt64, "ExtendedTimeout",

1123

type_func = timedelta_to_milliseconds)

1124

interval = notifychangeproperty(dbus.UInt64,

1125

"Interval",

1126

type_func =

1127

timedelta_to_milliseconds)

1128

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

1129

1130

del notifychangeproperty

719

720

def _get_approvals_pending(self):

721

return self._approvals_pending

722

def _set_approvals_pending(self, value):

723

old_value = self._approvals_pending

724

self._approvals_pending = value

725

bval = bool(value)

726

if (hasattr(self, "dbus_object_path")

727

and bval is not bool(old_value)):

728

dbus_bool = dbus.Boolean(bval, variant_level=1)

729

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

730

dbus_bool)

731

732

approvals_pending = property(_get_approvals_pending,

733

_set_approvals_pending)

734

del _get_approvals_pending, _set_approvals_pending

735

736

@staticmethod

737

def _datetime_to_dbus(dt, variant_level=0):

738

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

739

return dbus.String(dt.isoformat(),

740

variant_level=variant_level)

741

742

def enable(self):

743

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

744

r = Client.enable(self)

745

if oldstate != self.enabled:

746

# Emit D-Bus signals

747

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

748

dbus.Boolean(True, variant_level=1))

749

self.PropertyChanged(

750

dbus.String(u"last_enabled"),

751

self._datetime_to_dbus(self.last_enabled,

752

variant_level=1))

753

return r

754

755

def disable(self, quiet = False):

756

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

757

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

758

if not quiet and oldstate != self.enabled:

759

# Emit D-Bus signal

760

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

761

dbus.Boolean(False, variant_level=1))

762

return r

1131

763

1132

764

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

1133

765

try:

1134

766

self.remove_from_connection()

1135

767

except LookupError:

1136

768

pass

1137

if hasattr(DBusObjectWithProperties, "__del__"):

769

if hasattr(DBusObjectWithProperties, u"__del__"):

1138

770

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

1139

771

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

1140

772

1142

774

*args, **kwargs):

1143

775

self.checker_callback_tag = None

1144

776

self.checker = None

777

# Emit D-Bus signal

778

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

779

dbus.Boolean(False, variant_level=1))

1145

780

if os.WIFEXITED(condition):

1146

781

exitstatus = os.WEXITSTATUS(condition)

1147

782

# Emit D-Bus signal

1157

792

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

1158

793

*args, **kwargs)

1159

794

795

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

796

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

797

# Emit D-Bus signal

798

self.PropertyChanged(

799

dbus.String(u"last_checked_ok"),

800

(self._datetime_to_dbus(self.last_checked_ok,

801

variant_level=1)))

802

return r

803

1160

804

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

1161

805

old_checker = self.checker

1162

806

if self.checker is not None:

1169

813

and old_checker_pid != self.checker.pid):

1170

814

# Emit D-Bus signal

1171

815

self.CheckerStarted(self.current_checker_command)

816

self.PropertyChanged(

817

dbus.String(u"checker_running"),

818

dbus.Boolean(True, variant_level=1))

1172

819

return r

1173

820

821

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

822

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

823

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

824

if (old_checker is not None

825

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

826

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

827

dbus.Boolean(False, variant_level=1))

828

return r

829

1174

830

def _reset_approved(self):

1175

self.approved = None

831

self._approved = None

1176

832

return False

1177

833

1178

834

def approve(self, value=True):

1179

835

self.send_changedstate()

1180

self.approved = value

1181

gobject.timeout_add(timedelta_to_milliseconds

1182

(self.approval_duration),

836

self._approved = value

837

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

1183

838

self._reset_approved)

1184

839

1185

840

1186

841

## D-Bus methods, signals & properties

1187

_interface = "se.recompile.Mandos.Client"

842

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

1188

843

1189

844

## Signals

1190

845

1191

846

# CheckerCompleted - signal

1192

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

847

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

1193

848

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

1194

849

"D-Bus signal"

1195

850

pass

1196

851

1197

852

# CheckerStarted - signal

1198

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

853

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

1199

854

def CheckerStarted(self, command):

1200

855

"D-Bus signal"

1201

856

pass

1202

857

1203

858

# PropertyChanged - signal

1204

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

859

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

1205

860

def PropertyChanged(self, property, value):

1206

861

"D-Bus signal"

1207

862

pass

1216

871

pass

1217

872

1218

873

# Rejected - signal

1219

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

874

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

1220

875

def Rejected(self, reason):

1221

876

"D-Bus signal"

1222

877

pass

1223

878

1224

879

# NeedApproval - signal

1225

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

880

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

1226

881

def NeedApproval(self, timeout, default):

1227

882

"D-Bus signal"

1228

return self.need_approval()

1229

1230

# NeRwequest - signal

1231

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

1232

def NewRequest(self, ip):

1233

"""D-Bus signal

1234

Is sent after a client request a password.

1235

"""

1236

883

pass

1237

884

1238

885

## Methods

1239

886

1240

887

# Approve - method

1241

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

888

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

1242

889

def Approve(self, value):

1243

890

self.approve(value)

1244

891

1245

892

# CheckedOK - method

1246

893

@dbus.service.method(_interface)

1247

894

def CheckedOK(self):

1248

self.checked_ok()

895

return self.checked_ok()

1249

896

1250

897

# Enable - method

1251

898

@dbus.service.method(_interface)

1272

919

1273

920

## Properties

1274

921

1275

# ApprovalPending - property

1276

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

1277

def ApprovalPending_dbus_property(self):

922

# approved_pending - property

923

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

924

def approved_pending_dbus_property(self):

1278

925

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

1279

926

1280

# ApprovedByDefault - property

1281

@dbus_service_property(_interface, signature="b",

1282

access="readwrite")

1283

def ApprovedByDefault_dbus_property(self, value=None):

1284

if value is None: # get

1285

return dbus.Boolean(self.approved_by_default)

1286

self.approved_by_default = bool(value)

1287

1288

# ApprovalDelay - property

1289

@dbus_service_property(_interface, signature="t",

1290

access="readwrite")

1291

def ApprovalDelay_dbus_property(self, value=None):

1292

if value is None: # get

1293

return dbus.UInt64(self.approval_delay_milliseconds())

1294

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

1295

1296

# ApprovalDuration - property

1297

@dbus_service_property(_interface, signature="t",

1298

access="readwrite")

1299

def ApprovalDuration_dbus_property(self, value=None):

1300

if value is None: # get

1301

return dbus.UInt64(timedelta_to_milliseconds(

1302

self.approval_duration))

1303

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

1304

1305

# Name - property

1306

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

1307

def Name_dbus_property(self):

927

# approved_by_default - property

928

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

929

access=u"readwrite")

930

def approved_by_default_dbus_property(self):

931

return dbus.Boolean(self.approved_by_default)

932

933

# approved_delay - property

934

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

935

access=u"readwrite")

936

def approved_delay_dbus_property(self):

937

return dbus.UInt64(self.approved_delay_milliseconds())

938

939

# approved_duration - property

940

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

941

access=u"readwrite")

942

def approved_duration_dbus_property(self):

943

return dbus.UInt64(self._timedelta_to_milliseconds(

944

self.approved_duration))

945

946

# name - property

947

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

948

def name_dbus_property(self):

1308

949

return dbus.String(self.name)

1309

950

1310

# Fingerprint - property

1311

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

1312

def Fingerprint_dbus_property(self):

951

# fingerprint - property

952

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

953

def fingerprint_dbus_property(self):

1313

954

return dbus.String(self.fingerprint)

1314

955

1315

# Host - property

1316

@dbus_service_property(_interface, signature="s",

1317

access="readwrite")

1318

def Host_dbus_property(self, value=None):

956

# host - property

957

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

958

access=u"readwrite")

959

def host_dbus_property(self, value=None):

1319

960

if value is None: # get

1320

961

return dbus.String(self.host)

1321

self.host = unicode(value)

1322

1323

# Created - property

1324

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

1325

def Created_dbus_property(self):

1326

return datetime_to_dbus(self.created)

1327

1328

# LastEnabled - property

1329

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

1330

def LastEnabled_dbus_property(self):

1331

return datetime_to_dbus(self.last_enabled)

1332

1333

# Enabled - property

1334

@dbus_service_property(_interface, signature="b",

1335

access="readwrite")

1336

def Enabled_dbus_property(self, value=None):

962

self.host = value

963

# Emit D-Bus signal

964

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

965

dbus.String(value, variant_level=1))

966

967

# created - property

968

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

969

def created_dbus_property(self):

970

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

971

972

# last_enabled - property

973

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

974

def last_enabled_dbus_property(self):

975

if self.last_enabled is None:

976

return dbus.String(u"")

977

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

978

979

# enabled - property

980

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

981

access=u"readwrite")

982

def enabled_dbus_property(self, value=None):

1337

983

if value is None: # get

1338

984

return dbus.Boolean(self.enabled)

1339

985

if value:

1341

987

else:

1342

988

self.disable()

1343

989

1344

# LastCheckedOK - property

1345

@dbus_service_property(_interface, signature="s",

1346

access="readwrite")

1347

def LastCheckedOK_dbus_property(self, value=None):

990

# last_checked_ok - property

991

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

992

access=u"readwrite")

993

def last_checked_ok_dbus_property(self, value=None):

1348

994

if value is not None:

1349

995

self.checked_ok()

1350

996

return

1351

return datetime_to_dbus(self.last_checked_ok)

1352

1353

# Expires - property

1354

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

1355

def Expires_dbus_property(self):

1356

return datetime_to_dbus(self.expires)

1357

1358

# LastApprovalRequest - property

1359

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

1360

def LastApprovalRequest_dbus_property(self):

1361

return datetime_to_dbus(self.last_approval_request)

1362

1363

# Timeout - property

1364

@dbus_service_property(_interface, signature="t",

1365

access="readwrite")

1366

def Timeout_dbus_property(self, value=None):

997

if self.last_checked_ok is None:

998

return dbus.String(u"")

999

return dbus.String(self._datetime_to_dbus(self

1000

.last_checked_ok))

1001

1002

# timeout - property

1003

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

1004

access=u"readwrite")

1005

def timeout_dbus_property(self, value=None):

1367

1006

if value is None: # get

1368

1007

return dbus.UInt64(self.timeout_milliseconds())

1369

1008

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

1009

# Emit D-Bus signal

1010

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

1011

dbus.UInt64(value, variant_level=1))

1012

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

1013

return

1370

1014

# Reschedule timeout

1371

if self.enabled:

1372

now = datetime.datetime.utcnow()

1373

time_to_die = timedelta_to_milliseconds(

1374

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

1375

if time_to_die <= 0:

1376

# The timeout has passed

1377

self.disable()

1378

else:

1379

self.expires = (now +

1380

datetime.timedelta(milliseconds =

1381

time_to_die))

1382

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

1383

is None):

1384

return

1385

gobject.source_remove(self.disable_initiator_tag)

1386

self.disable_initiator_tag = (gobject.timeout_add

1387

(time_to_die,

1388

self.disable))

1389

1390

# ExtendedTimeout - property

1391

@dbus_service_property(_interface, signature="t",

1392

access="readwrite")

1393

def ExtendedTimeout_dbus_property(self, value=None):

1394

if value is None: # get

1395

return dbus.UInt64(self.extended_timeout_milliseconds())

1396

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

1397

1398

# Interval - property

1399

@dbus_service_property(_interface, signature="t",

1400

access="readwrite")

1401

def Interval_dbus_property(self, value=None):

1015

gobject.source_remove(self.disable_initiator_tag)

1016

self.disable_initiator_tag = None

1017

time_to_die = (self.

1018

_timedelta_to_milliseconds((self

1019

.last_checked_ok

1020

+ self.timeout)

1021

- datetime.datetime

1022

.utcnow()))

1023

if time_to_die <= 0:

1024

# The timeout has passed

1025

self.disable()

1026

else:

1027

self.disable_initiator_tag = (gobject.timeout_add

1028

(time_to_die, self.disable))

1029

1030

# interval - property

1031

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

1032

access=u"readwrite")

1033

def interval_dbus_property(self, value=None):

1402

1034

if value is None: # get

1403

1035

return dbus.UInt64(self.interval_milliseconds())

1404

1036

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

1405

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

1037

# Emit D-Bus signal

1038

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

1039

dbus.UInt64(value, variant_level=1))

1040

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

1406

1041

return

1407

if self.enabled:

1408

# Reschedule checker run

1409

gobject.source_remove(self.checker_initiator_tag)

1410

self.checker_initiator_tag = (gobject.timeout_add

1411

(value, self.start_checker))

1412

self.start_checker() # Start one now, too

1413

1414

# Checker - property

1415

@dbus_service_property(_interface, signature="s",

1416

access="readwrite")

1417

def Checker_dbus_property(self, value=None):

1042

# Reschedule checker run

1043

gobject.source_remove(self.checker_initiator_tag)

1044

self.checker_initiator_tag = (gobject.timeout_add

1045

(value, self.start_checker))

1046

self.start_checker() # Start one now, too

1047

1048

# checker - property

1049

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

1050

access=u"readwrite")

1051

def checker_dbus_property(self, value=None):

1418

1052

if value is None: # get

1419

1053

return dbus.String(self.checker_command)

1420

self.checker_command = unicode(value)

1054

self.checker_command = value

1055

# Emit D-Bus signal

1056

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

1057

dbus.String(self.checker_command,

1058

variant_level=1))

1421

1059

1422

# CheckerRunning - property

1423

@dbus_service_property(_interface, signature="b",

1424

access="readwrite")

1425

def CheckerRunning_dbus_property(self, value=None):

1060

# checker_running - property

1061

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

1062

access=u"readwrite")

1063

def checker_running_dbus_property(self, value=None):

1426

1064

if value is None: # get

1427

1065

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

1428

1066

if value:

1430

1068

else:

1431

1069

self.stop_checker()

1432

1070

1433

# ObjectPath - property

1434

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

1435

def ObjectPath_dbus_property(self):

1071

# object_path - property

1072

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

1073

def object_path_dbus_property(self):

1436

1074

return self.dbus_object_path # is already a dbus.ObjectPath

1437

1075

1438

# Secret = property

1439

@dbus_service_property(_interface, signature="ay",

1440

access="write", byte_arrays=True)

1441

def Secret_dbus_property(self, value):

1076

# secret = property

1077

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

1078

access=u"write", byte_arrays=True)

1079

def secret_dbus_property(self, value):

1442

1080

self.secret = str(value)

1443

1081

1444

1082

del _interface

1450

1088

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

1451

1089

if not self._pipe.recv():

1452

1090

raise KeyError()

1453

1091

1454

1092

def __getattribute__(self, name):

1455

if name == '_pipe':

1093

if(name == '_pipe'):

1456

1094

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

1457

1095

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

1458

1096

data = self._pipe.recv()

1463

1101

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

1464

1102

return self._pipe.recv()[1]

1465

1103

return func

1466

1104

1467

1105

def __setattr__(self, name, value):

1468

if name == '_pipe':

1106

if(name == '_pipe'):

1469

1107

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

1470

1108

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

1471

1109

1472

1110

1473

class ClientDBusTransitional(ClientDBus):

1474

__metaclass__ = AlternateDBusNamesMetaclass

1475

1476

1477

1111

class ClientHandler(socketserver.BaseRequestHandler, object):

1478

1112

"""A class to handle client connections.

1479

1113

1482

1116

1483

1117

def handle(self):

1484

1118

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

1485

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

1119

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

1486

1120

unicode(self.client_address))

1487

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

1121

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

1488

1122

self.server.child_pipe.fileno())

1489

1123

1490

1124

session = (gnutls.connection

1491

1125

.ClientSession(self.request,

1492

1126

gnutls.connection

1493

1127

.X509Credentials()))

1494

1128

1495

1129

# Note: gnutls.connection.X509Credentials is really a

1496

1130

# generic GnuTLS certificate credentials object so long as

1497

1131

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

1498

1132

# here despite using OpenPGP certificates.

1499

1500

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

1501

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

1502

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

1503

# "+DHE-DSS"))

1133

1134

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

1135

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

1136

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

1137

# u"+DHE-DSS"))

1504

1138

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

1505

1139

priority = self.server.gnutls_priority

1506

1140

if priority is None:

1507

priority = "NORMAL"

1141

priority = u"NORMAL"

1508

1142

(gnutls.library.functions

1509

1143

.gnutls_priority_set_direct(session._c_object,

1510

1144

priority, None))

1511

1145

1512

1146

# Start communication using the Mandos protocol

1513

1147

# Get protocol number

1514

1148

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

1515

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

1149

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

1516

1150

try:

1517

1151

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

1518

1152

raise RuntimeError

1519

except (ValueError, IndexError, RuntimeError) as error:

1520

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

1153

except (ValueError, IndexError, RuntimeError), error:

1154

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

1521

1155

return

1522

1156

1523

1157

# Start GnuTLS connection

1524

1158

try:

1525

1159

session.handshake()

1526

except gnutls.errors.GNUTLSError as error:

1527

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

1160

except gnutls.errors.GNUTLSError, error:

1161

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

1528

1162

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

1529

1163

# established. Just abandon the request.

1530

1164

return

1531

logger.debug("Handshake succeeded")

1532

1165

logger.debug(u"Handshake succeeded")

1166

1533

1167

approval_required = False

1534

1168

try:

1535

1169

try:

1536

1170

fpr = self.fingerprint(self.peer_certificate

1537

1171

(session))

1538

except (TypeError,

1539

gnutls.errors.GNUTLSError) as error:

1540

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

1172

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

1173

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

1541

1174

return

1542

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

1543

1175

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

1176

1544

1177

try:

1545

1178

client = ProxyClient(child_pipe, fpr,

1546

1179

self.client_address)

1547

1180

except KeyError:

1548

1181

return

1549

1182

1550

if self.server.use_dbus:

1551

# Emit D-Bus signal

1552

client.NewRequest(str(self.client_address))

1553

1554

if client.approval_delay:

1555

delay = client.approval_delay

1183

if client.approved_delay:

1184

delay = client.approved_delay

1556

1185

client.approvals_pending += 1

1557

1186

approval_required = True

1558

1187

1559

1188

while True:

1560

1189

if not client.enabled:

1561

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

1190

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

1562

1191

client.name)

1563

1192

if self.server.use_dbus:

1564

1193

# Emit D-Bus signal

1565

client.Rejected("Disabled")

1194

client.Rejected("Disabled")

1566

1195

return

1567

1196

1568

if client.approved or not client.approval_delay:

1197

if client._approved or not client.approved_delay:

1569

1198

#We are approved or approval is disabled

1570

1199

break

1571

elif client.approved is None:

1572

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

1200

elif client._approved is None:

1201

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

1573

1202

client.name)

1574

1203

if self.server.use_dbus:

1575

1204

# Emit D-Bus signal

1576

1205

client.NeedApproval(

1577

client.approval_delay_milliseconds(),

1206

client.approved_delay_milliseconds(),

1578

1207

client.approved_by_default)

1579

1208

else:

1580

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

1209

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

1581

1210

client.name)

1582

1211

if self.server.use_dbus:

1583

1212

# Emit D-Bus signal

1584

client.Rejected("Denied")

1213

client.Rejected("Disapproved")

1585

1214

return

1586

1215

1587

1216

#wait until timeout or approved

1217

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

1588

1218

time = datetime.datetime.now()

1589

1219

client.changedstate.acquire()

1590

(client.changedstate.wait

1591

(float(client.timedelta_to_milliseconds(delay)

1592

/ 1000)))

1220

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

1593

1221

client.changedstate.release()

1594

1222

time2 = datetime.datetime.now()

1595

1223

if (time2 - time) >= delay:

1610

1238

while sent_size < len(client.secret):

1611

1239

try:

1612

1240

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

1613

except gnutls.errors.GNUTLSError as error:

1241

except (gnutls.errors.GNUTLSError), error:

1614

1242

logger.warning("gnutls send failed")

1615

1243

return

1616

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

1244

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

1617

1245

sent, len(client.secret)

1618

1246

- (sent_size + sent))

1619

1247

sent_size += sent

1620

1621

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

1622

# bump the timeout using extended_timeout

1623

client.checked_ok(client.extended_timeout)

1248

1249

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

1250

# bump the timeout as if seen

1251

client.checked_ok()

1624

1252

if self.server.use_dbus:

1625

1253

# Emit D-Bus signal

1626

1254

client.GotSecret()

1630

1258

client.approvals_pending -= 1

1631

1259

try:

1632

1260

session.bye()

1633

except gnutls.errors.GNUTLSError as error:

1634

logger.warning("GnuTLS bye failed")

1261

except (gnutls.errors.GNUTLSError), error:

1262

logger.warning("gnutls bye failed")

1635

1263

1636

1264

@staticmethod

1637

1265

def peer_certificate(session):

1647

1275

.gnutls_certificate_get_peers

1648

1276

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

1649

1277

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

1650

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

1651

" certificate")

1278

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

1279

u" certificate")

1652

1280

if list_size.value == 0:

1653

1281

return None

1654

1282

cert = cert_list[0]

1680

1308

if crtverify.value != 0:

1681

1309

gnutls.library.functions.gnutls_openpgp_crt_deinit(crt)

1682

1310

raise (gnutls.errors.CertificateSecurityError

1683

("Verify failed"))

1311

(u"Verify failed"))

1684

1312

# New buffer for the fingerprint

1685

1313

buf = ctypes.create_string_buffer(20)

1686

1314

buf_len = ctypes.c_size_t()

1693

1321

# Convert the buffer to a Python bytestring

1694

1322

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

1695

1323

# Convert the bytestring to hexadecimal notation

1696

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

1324

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

1697

1325

return hex_fpr

1698

1326

1699

1327

1702

1330

def sub_process_main(self, request, address):

1703

1331

try:

1704

1332

self.finish_request(request, address)

1705

except Exception:

1333

except:

1706

1334

self.handle_error(request, address)

1707

1335

self.close_request(request)

1708

1336

1709

1337

def process_request(self, request, address):

1710

1338

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

1711

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

1712

args = (request,

1713

address))

1714

proc.start()

1715

return proc

1716

1339

multiprocessing.Process(target = self.sub_process_main,

1340

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

1717

1341

1718

1342

class MultiprocessingMixInWithPipe(MultiprocessingMixIn, object):

1719

1343

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

1723

1347

This function creates a new pipe in self.pipe

1724

1348

"""

1725

1349

parent_pipe, self.child_pipe = multiprocessing.Pipe()

1726

1727

proc = MultiprocessingMixIn.process_request(self, request,

1728

client_address)

1350

1351

super(MultiprocessingMixInWithPipe,

1352

self).process_request(request, client_address)

1729

1353

self.child_pipe.close()

1730

self.add_pipe(parent_pipe, proc)

1731

1732

def add_pipe(self, parent_pipe, proc):

1354

self.add_pipe(parent_pipe)

1355

1356

def add_pipe(self, parent_pipe):

1733

1357

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

1734

raise NotImplementedError

1735

1358

pass

1736

1359

1737

1360

class IPv6_TCPServer(MultiprocessingMixInWithPipe,

1738

1361

socketserver.TCPServer, object):

1756

1379

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

1757

1380

if self.interface is not None:

1758

1381

if SO_BINDTODEVICE is None:

1759

logger.error("SO_BINDTODEVICE does not exist;"

1760

" cannot bind to interface %s",

1382

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

1383

u" cannot bind to interface %s",

1761

1384

self.interface)

1762

1385

else:

1763

1386

try:

1764

1387

self.socket.setsockopt(socket.SOL_SOCKET,

1765

1388

SO_BINDTODEVICE,

1766

1389

str(self.interface

1767

+ '\0'))

1768

except socket.error as error:

1390

+ u'\0'))

1391

except socket.error, error:

1769

1392

if error[0] == errno.EPERM:

1770

logger.error("No permission to"

1771

" bind to interface %s",

1393

logger.error(u"No permission to"

1394

u" bind to interface %s",

1772

1395

self.interface)

1773

1396

elif error[0] == errno.ENOPROTOOPT:

1774

logger.error("SO_BINDTODEVICE not available;"

1775

" cannot bind to interface %s",

1397

logger.error(u"SO_BINDTODEVICE not available;"

1398

u" cannot bind to interface %s",

1776

1399

self.interface)

1777

1400

else:

1778

1401

raise

1780

1403

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

1781

1404

if not self.server_address[0]:

1782

1405

if self.address_family == socket.AF_INET6:

1783

any_address = "::" # in6addr_any

1406

any_address = u"::" # in6addr_any

1784

1407

else:

1785

1408

any_address = socket.INADDR_ANY

1786

1409

self.server_address = (any_address,

1813

1436

self.enabled = False

1814

1437

self.clients = clients

1815

1438

if self.clients is None:

1816

self.clients = {}

1439

self.clients = set()

1817

1440

self.use_dbus = use_dbus

1818

1441

self.gnutls_priority = gnutls_priority

1819

1442

IPv6_TCPServer.__init__(self, server_address,

1823

1446

def server_activate(self):

1824

1447

if self.enabled:

1825

1448

return socketserver.TCPServer.server_activate(self)

1826

1827

1449

def enable(self):

1828

1450

self.enabled = True

1829

1830

def add_pipe(self, parent_pipe, proc):

1451

def add_pipe(self, parent_pipe):

1831

1452

# Call "handle_ipc" for both data and EOF events

1832

1453

gobject.io_add_watch(parent_pipe.fileno(),

1833

1454

gobject.IO_IN | gobject.IO_HUP,

1834

1455

functools.partial(self.handle_ipc,

1835

parent_pipe =

1836

parent_pipe,

1837

proc = proc))

1838

1456

parent_pipe = parent_pipe))

1457

1839

1458

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

1840

proc = None, client_object=None):

1459

client_object=None):

1841

1460

condition_names = {

1842

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

1843

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

1461

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

1462

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

1844

1463

# blocking).

1845

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

1846

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

1847

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

1464

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

1465

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

1466

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

1848

1467

# broken, usually for pipes and

1849

1468

# sockets).

1850

1469

}

1852

1471

for cond, name in

1853

1472

condition_names.iteritems()

1854

1473

if cond & condition)

1855

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

1474

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

1856

1475

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

1857

# Wait for other process to exit

1858

proc.join()

1859

1476

return False

1860

1477

1861

1478

# Read a request from the child

1866

1483

fpr = request[1]

1867

1484

address = request[2]

1868

1485

1869

for c in self.clients.itervalues():

1486

for c in self.clients:

1870

1487

if c.fingerprint == fpr:

1871

1488

client = c

1872

1489

break

1873

1490

else:

1874

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

1875

"dress: %s", fpr, address)

1491

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

1492

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

1876

1493

if self.use_dbus:

1877

1494

# Emit D-Bus signal

1878

mandos_dbus_service.ClientNotFound(fpr,

1879

address[0])

1495

mandos_dbus_service.ClientNotFound(fpr, address)

1880

1496

parent_pipe.send(False)

1881

1497

return False

1882

1498

1883

1499

gobject.io_add_watch(parent_pipe.fileno(),

1884

1500

gobject.IO_IN | gobject.IO_HUP,

1885

1501

functools.partial(self.handle_ipc,

1886

parent_pipe =

1887

parent_pipe,

1888

proc = proc,

1889

client_object =

1890

client))

1502

parent_pipe = parent_pipe,

1503

client_object = client))

1891

1504

parent_pipe.send(True)

1892

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

1893

# same fileno

1505

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

1894

1506

return False

1895

1507

if command == 'funcall':

1896

1508

funcname = request[1]

1897

1509

args = request[2]

1898

1510

kwargs = request[3]

1899

1511

1900

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

1901

funcname)(*args,

1902

**kwargs)))

1903

1512

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

1513

1904

1514

if command == 'getattr':

1905

1515

attrname = request[1]

1906

1516

if callable(client_object.__getattribute__(attrname)):

1907

1517

parent_pipe.send(('function',))

1908

1518

else:

1909

parent_pipe.send(('data', client_object

1910

.__getattribute__(attrname)))

1519

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

1911

1520

1912

1521

if command == 'setattr':

1913

1522

attrname = request[1]

1914

1523

value = request[2]

1915

1524

setattr(client_object, attrname, value)

1916

1525

1917

1526

return True

1918

1527

1919

1528

1920

1529

def string_to_delta(interval):

1921

1530

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

1922

1531

1923

>>> string_to_delta('7d')

1532

>>> string_to_delta(u'7d')

1924

1533

datetime.timedelta(7)

1925

>>> string_to_delta('60s')

1534

>>> string_to_delta(u'60s')

1926

1535

datetime.timedelta(0, 60)

1927

>>> string_to_delta('60m')

1536

>>> string_to_delta(u'60m')

1928

1537

datetime.timedelta(0, 3600)

1929

>>> string_to_delta('24h')

1538

>>> string_to_delta(u'24h')

1930

1539

datetime.timedelta(1)

1931

>>> string_to_delta('1w')

1540

>>> string_to_delta(u'1w')

1932

1541

datetime.timedelta(7)

1933

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

1542

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

1934

1543

datetime.timedelta(0, 330)

1935

1544

"""

1936

1545

timevalue = datetime.timedelta(0)

1938

1547

try:

1939

1548

suffix = unicode(s[-1])

1940

1549

value = int(s[:-1])

1941

if suffix == "d":

1550

if suffix == u"d":

1942

1551

delta = datetime.timedelta(value)

1943

elif suffix == "s":

1552

elif suffix == u"s":

1944

1553

delta = datetime.timedelta(0, value)

1945

elif suffix == "m":

1554

elif suffix == u"m":

1946

1555

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

1947

elif suffix == "h":

1556

elif suffix == u"h":

1948

1557

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

1949

elif suffix == "w":

1558

elif suffix == u"w":

1950

1559

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

1951

1560

else:

1952

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

1953

except (ValueError, IndexError) as e:

1954

raise ValueError(*(e.args))

1561

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

1562

except (ValueError, IndexError), e:

1563

raise ValueError(e.message)

1955

1564

timevalue += delta

1956

1565

return timevalue

1957

1566

1958

1567

1568

def if_nametoindex(interface):

1569

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

1570

1571

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

1572

global if_nametoindex

1573

try:

1574

if_nametoindex = (ctypes.cdll.LoadLibrary

1575

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

1576

.if_nametoindex)

1577

except (OSError, AttributeError):

1578

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

1579

def if_nametoindex(interface):

1580

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

1581

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

1582

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

1583

ifreq = fcntl.ioctl(s, SIOCGIFINDEX,

1584

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

1585

interface))

1586

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

1587

ifreq[16:20])[0]

1588

return interface_index

1589

return if_nametoindex(interface)

1590

1591

1959

1592

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

1960

1593

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

1961

1594

1964

1597

sys.exit()

1965

1598

os.setsid()

1966

1599

if not nochdir:

1967

os.chdir("/")

1600

os.chdir(u"/")

1968

1601

if os.fork():

1969

1602

sys.exit()

1970

1603

if not noclose:

1972

1605

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

1973

1606

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

1974

1607

raise OSError(errno.ENODEV,

1975

"%s not a character device"

1608

u"%s not a character device"

1976

1609

% os.path.devnull)

1977

1610

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

1978

1611

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

1986

1619

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

1987

1620

# Parsing of options, both command line and config file

1988

1621

1989

parser = argparse.ArgumentParser()

1990

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

1991

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

1992

help="show version number and exit")

1993

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

1994

help="Bind to interface IF")

1995

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

1996

help="Address to listen for requests on")

1997

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

1998

help="Port number to receive requests on")

1999

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

2000

help="Run self-test")

2001

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

2002

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

2003

" to terminal")

2004

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

2005

help="Debug level for stdout output")

2006

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

2007

" priority string (see GnuTLS documentation)")

2008

parser.add_argument("--servicename",

2009

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

2010

parser.add_argument("--configdir",

2011

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

2012

help="Directory to search for configuration"

2013

" files")

2014

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

2015

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

2016

" system bus interface")

2017

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

2018

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

2019

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

2020

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

2021

" state")

2022

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

2023

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

2024

2025

options = parser.parse_args()

1622

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

1623

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

1624

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

1625

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

1626

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

1627

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

1628

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

1629

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

1630

help=u"Run self-test")

1631

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

1632

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

1633

u" terminal")

1634

parser.add_option("--debuglevel", type=u"string", metavar="Level",

1635

help=u"Debug level for stdout output")

1636

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

1637

u" priority string (see GnuTLS documentation)")

1638

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

1639

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

1640

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

1641

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

1642

help=u"Directory to search for configuration"

1643

u" files")

1644

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

1645

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

1646

u" system bus interface")

1647

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

1648

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

1649

options = parser.parse_args()[0]

2026

1650

2027

1651

if options.check:

2028

1652

import doctest

2030

1654

sys.exit()

2031

1655

2032

1656

# Default values for config file for server-global settings

2033

server_defaults = { "interface": "",

2034

"address": "",

2035

"port": "",

2036

"debug": "False",

2037

"priority":

2038

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

2039

"servicename": "Mandos",

2040

"use_dbus": "True",

2041

"use_ipv6": "True",

2042

"debuglevel": "",

2043

"restore": "True",

2044

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

1657

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

1658

u"address": u"",

1659

u"port": u"",

1660

u"debug": u"False",

1661

u"priority":

1662

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

1663

u"servicename": u"Mandos",

1664

u"use_dbus": u"True",

1665

u"use_ipv6": u"True",

1666

u"debuglevel": u"",

2045

1667

}

2046

1668

2047

1669

# Parse config file for server-global settings

2048

1670

server_config = configparser.SafeConfigParser(server_defaults)

2049

1671

del server_defaults

2050

1672

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

2051

"mandos.conf"))

1673

u"mandos.conf"))

2052

1674

# Convert the SafeConfigParser object to a dict

2053

1675

server_settings = server_config.defaults()

2054

1676

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

2055

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

2056

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

1677

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

1678

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

2057

1679

option)

2058

1680

if server_settings["port"]:

2059

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

2060

"port")

1681

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

1682

u"port")

2061

1683

del server_config

2062

1684

2063

1685

# Override the settings from the config file with command line

2064

1686

# options, if set.

2065

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

2066

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

2067

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

2068

"statedir"):

1687

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

1688

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

1689

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

2069

1690

value = getattr(options, option)

2070

1691

if value is not None:

2071

1692

server_settings[option] = value

2079

1700

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

2080

1701

2081

1702

# For convenience

2082

debug = server_settings["debug"]

2083

debuglevel = server_settings["debuglevel"]

2084

use_dbus = server_settings["use_dbus"]

2085

use_ipv6 = server_settings["use_ipv6"]

2086

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

2087

stored_state_file)

2088

2089

if debug:

2090

initlogger(debug, logging.DEBUG)

2091

else:

2092

if not debuglevel:

2093

initlogger(debug)

2094

else:

2095

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

2096

initlogger(debug, level)

2097

2098

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

1703

debug = server_settings[u"debug"]

1704

debuglevel = server_settings[u"debuglevel"]

1705

use_dbus = server_settings[u"use_dbus"]

1706

use_ipv6 = server_settings[u"use_ipv6"]

1707

1708

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

2099

1709

syslogger.setFormatter(logging.Formatter

2100

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

2101

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

2102

% server_settings["servicename"]))

1710

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

1711

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

1712

% server_settings[u"servicename"]))

2103

1713

2104

1714

# Parse config file with clients

2105

client_config = configparser.SafeConfigParser(Client

2106

.client_defaults)

2107

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

2108

"clients.conf"))

1715

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

1716

u"interval": u"5m",

1717

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

1718

u"host": u"",

1719

u"approved_delay": u"0s",

1720

u"approved_duration": u"1s",

1721

}

1722

client_config = configparser.SafeConfigParser(client_defaults)

1723

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

1724

u"clients.conf"))

2109

1725

2110

1726

global mandos_dbus_service

2111

1727

mandos_dbus_service = None

2112

1728

2113

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

2114

server_settings["port"]),

1729

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

1730

server_settings[u"port"]),

2115

1731

ClientHandler,

2116

interface=(server_settings["interface"]

1732

interface=(server_settings[u"interface"]

2117

1733

or None),

2118

1734

use_ipv6=use_ipv6,

2119

1735

gnutls_priority=

2120

server_settings["priority"],

1736

server_settings[u"priority"],

2121

1737

use_dbus=use_dbus)

2122

if not debug:

2123

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

2124

try:

2125

pidfile = open(pidfilename, "w")

2126

except IOError:

2127

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

1738

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

1739

try:

1740

pidfile = open(pidfilename, u"w")

1741

except IOError:

1742

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

2128

1743

2129

1744

try:

2130

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

2131

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

1745

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

1746

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

2132

1747

except KeyError:

2133

1748

try:

2134

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

2135

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

1749

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

1750

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

2136

1751

except KeyError:

2137

1752

try:

2138

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

2139

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

1753

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

1754

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

2140

1755

except KeyError:

2141

1756

uid = 65534

2142

1757

gid = 65534

2143

1758

try:

2144

1759

os.setgid(gid)

2145

1760

os.setuid(uid)

2146

except OSError as error:

1761

except OSError, error:

2147

1762

if error[0] != errno.EPERM:

2148

1763

raise error

2149

1764

1765

# Enable all possible GnuTLS debugging

1766

1767

1768

if not debug and not debuglevel:

1769

syslogger.setLevel(logging.WARNING)

1770

console.setLevel(logging.WARNING)

1771

if debuglevel:

1772

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

1773

syslogger.setLevel(level)

1774

console.setLevel(level)

1775

2150

1776

if debug:

2151

# Enable all possible GnuTLS debugging

2152

2153

1777

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

2154

1778

# - GnuTLS manual

2155

1779

gnutls.library.functions.gnutls_global_set_log_level(11)

2156

1780

2157

1781

@gnutls.library.types.gnutls_log_func

2158

1782

def debug_gnutls(level, string):

2159

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

1783

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

2160

1784

2161

1785

(gnutls.library.functions

2162

1786

.gnutls_global_set_log_function(debug_gnutls))

2163

1787

2164

1788

# Redirect stdin so all checkers get /dev/null

2165

1789

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

2166

1790

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

2167

1791

if null > 2:

2168

1792

os.close(null)

2169

2170

# Need to fork before connecting to D-Bus

2171

if not debug:

2172

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

2173

daemon()

2174

2175

gobject.threads_init()

1793

else:

1794

# No console logging

1795

logger.removeHandler(console)

1796

2176

1797

2177

1798

global main_loop

2178

1799

# From the Avahi example code

2182

1803

# End of Avahi example code

2183

1804

if use_dbus:

2184

1805

try:

2185

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

1806

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

2186

1807

bus, do_not_queue=True)

2187

old_bus_name = (dbus.service.BusName

2188

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

2189

do_not_queue=True))

2190

except dbus.exceptions.NameExistsException as e:

2191

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

1808

except dbus.exceptions.NameExistsException, e:

1809

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

2192

1810

use_dbus = False

2193

server_settings["use_dbus"] = False

1811

server_settings[u"use_dbus"] = False

2194

1812

tcp_server.use_dbus = False

2195

1813

protocol = avahi.PROTO_INET6 if use_ipv6 else avahi.PROTO_INET

2196

service = AvahiServiceToSyslog(name =

2197

server_settings["servicename"],

2198

servicetype = "_mandos._tcp",

2199

protocol = protocol, bus = bus)

1814

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

1815

servicetype = u"_mandos._tcp",

1816

protocol = protocol, bus = bus)

2200

1817

if server_settings["interface"]:

2201

1818

service.interface = (if_nametoindex

2202

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

2203

1819

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

1820

1821

if not debug:

1822

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

1823

daemon()

1824

2204

1825

global multiprocessing_manager

2205

1826

multiprocessing_manager = multiprocessing.Manager()

2206

1827

2207

1828

client_class = Client

2208

1829

if use_dbus:

2209

client_class = functools.partial(ClientDBusTransitional,

2210

bus = bus)

2211

2212

client_settings = Client.config_parser(client_config)

2213

old_client_settings = {}

2214

clients_data = {}

2215

2216

# Get client data and settings from last running state.

2217

if server_settings["restore"]:

2218

try:

2219

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

2220

clients_data, old_client_settings = (pickle.load

2221

(stored_state))

2222

os.remove(stored_state_path)

2223

except IOError as e:

2224

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

2225

.format(e))

2226

if e.errno != errno.ENOENT:

2227

raise

2228

except EOFError as e:

2229

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

2230

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

2231

2232

with PGPEngine() as pgp:

2233

for client_name, client in clients_data.iteritems():

2234

# Decide which value to use after restoring saved state.

2235

# We have three different values: Old config file,

2236

# new config file, and saved state.

2237

# New config value takes precedence if it differs from old

2238

# config value, otherwise use saved state.

2239

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

2240

try:

2241

# For each value in new config, check if it

2242

# differs from the old config value (Except for

2243

# the "secret" attribute)

2244

if (name != "secret" and

2245

value != old_client_settings[client_name]

2246

[name]):

2247

client[name] = value

2248

except KeyError:

2249

pass

2250

2251

# Clients who has passed its expire date can still be

2252

# enabled if its last checker was successful. Clients

2253

# whose checker failed before we stored its state is

2254

# assumed to have failed all checkers during downtime.

2255

if client["enabled"]:

2256

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

2257

if not client["last_checked_ok"]:

2258

logger.warning(

2259

"disabling client {0} - Client never "

2260

"performed a successfull checker"

2261

.format(client["name"]))

2262

client["enabled"] = False

2263

elif client["last_checker_status"] != 0:

2264

logger.warning(

2265

"disabling client {0} - Client "

2266

"last checker failed with error code {1}"

2267

.format(client["name"],

2268

client["last_checker_status"]))

2269

client["enabled"] = False

2270

else:

2271

client["expires"] = (datetime.datetime

2272

.utcnow()

2273

+ client["timeout"])

2274

logger.debug("Last checker succeeded,"

2275

" keeping {0} enabled"

2276

.format(client["name"]))

1830

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

1831

def client_config_items(config, section):

1832

special_settings = {

1833

"approved_by_default":

1834

lambda: config.getboolean(section,

1835

"approved_by_default"),

1836

}

1837

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

2277

1838

try:

2278

client["secret"] = (

2279

pgp.decrypt(client["encrypted_secret"],

2280

client_settings[client_name]

2281

["secret"]))

2282

except PGPError:

2283

# If decryption fails, we use secret from new settings

2284

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

2285

.format(client_name))

2286

client["secret"] = (

2287

client_settings[client_name]["secret"])

2288

2289

2290

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

2291

for client_name in (set(old_client_settings)

2292

- set(client_settings)):

2293

del clients_data[client_name]

2294

for client_name in (set(client_settings)

2295

- set(old_client_settings)):

2296

clients_data[client_name] = client_settings[client_name]

2297

2298

# Create clients all clients

2299

for client_name, client in clients_data.iteritems():

2300

tcp_server.clients[client_name] = client_class(

2301

name = client_name, settings = client)

2302

1839

yield (name, special_settings[name]())

1840

except KeyError:

1841

yield (name, value)

1842

1843

tcp_server.clients.update(set(

1844

client_class(name = section,

1845

config= dict(client_config_items(

1846

client_config, section)))

1847

for section in client_config.sections()))

2303

1848

if not tcp_server.clients:

2304

logger.warning("No clients defined")

1849

logger.warning(u"No clients defined")

2305

1850

1851

try:

1852

with pidfile:

1853

pid = os.getpid()

1854

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

1855

del pidfile

1856

except IOError:

1857

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

1858

pidfilename, pid)

1859

except NameError:

1860

# "pidfile" was never created

1861

pass

1862

del pidfilename

1863

2306

1864

if not debug:

2307

try:

2308

with pidfile:

2309

pid = os.getpid()

2310

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

2311

del pidfile

2312

except IOError:

2313

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

2314

pidfilename, pid)

2315

except NameError:

2316

# "pidfile" was never created

2317

pass

2318

del pidfilename

2319

1865

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

2320

2321

1866

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

2322

1867

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

2323

1868

2325

1870

class MandosDBusService(dbus.service.Object):

2326

1871

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

2327

1872

def __init__(self):

2328

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

2329

_interface = "se.recompile.Mandos"

1873

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

1874

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

2330

1875

2331

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

1876

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

2332

1877

def ClientAdded(self, objpath):

2333

1878

"D-Bus signal"

2334

1879

pass

2335

1880

2336

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

1881

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

2337

1882

def ClientNotFound(self, fingerprint, address):

2338

1883

"D-Bus signal"

2339

1884

pass

2340

1885

2341

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

1886

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

2342

1887

def ClientRemoved(self, objpath, name):

2343

1888

"D-Bus signal"

2344

1889

pass

2345

1890

2346

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

1891

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

2347

1892

def GetAllClients(self):

2348

1893

"D-Bus method"

2349

1894

return dbus.Array(c.dbus_object_path

2350

for c in

2351

tcp_server.clients.itervalues())

1895

for c in tcp_server.clients)

2352

1896

2353

1897

@dbus.service.method(_interface,

2354

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

1898

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

2355

1899

def GetAllClientsWithProperties(self):

2356

1900

"D-Bus method"

2357

1901

return dbus.Dictionary(

2358

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

2359

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

2360

signature="oa{sv}")

1902

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

1903

for c in tcp_server.clients),

1904

signature=u"oa{sv}")

2361

1905

2362

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

1906

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

2363

1907

def RemoveClient(self, object_path):

2364

1908

"D-Bus method"

2365

for c in tcp_server.clients.itervalues():

1909

for c in tcp_server.clients:

2366

1910

if c.dbus_object_path == object_path:

2367

del tcp_server.clients[c.name]

1911

tcp_server.clients.remove(c)

2368

1912

c.remove_from_connection()

2369

1913

# Don't signal anything except ClientRemoved

2370

1914

c.disable(quiet=True)

2375

1919

2376

1920

del _interface

2377

1921

2378

class MandosDBusServiceTransitional(MandosDBusService):

2379

__metaclass__ = AlternateDBusNamesMetaclass

2380

mandos_dbus_service = MandosDBusServiceTransitional()

1922

mandos_dbus_service = MandosDBusService()

2381

1923

2382

1924

def cleanup():

2383

1925

"Cleanup function; run on exit"

2384

1926

service.cleanup()

2385

1927

2386

multiprocessing.active_children()

2387

if not (tcp_server.clients or client_settings):

2388

return

2389

2390

# Store client before exiting. Secrets are encrypted with key

2391

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

2392

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

2393

clients = {}

2394

with PGPEngine() as pgp:

2395

for client in tcp_server.clients.itervalues():

2396

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

2397

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

2398

key)

2399

client_dict = {}

2400

2401

# A list of attributes that can not be pickled

2402

# + secret.

2403

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

2404

"checker"))

2405

for name, typ in (inspect.getmembers

2406

(dbus.service.Object)):

2407

exclude.add(name)

2408

2409

client_dict["encrypted_secret"] = (client

2410

.encrypted_secret)

2411

for attr in client.client_structure:

2412

if attr not in exclude:

2413

client_dict[attr] = getattr(client, attr)

2414

2415

clients[client.name] = client_dict

2416

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

2417

2418

try:

2419

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

2420

prefix="clients-",

2421

dir=os.path.dirname

2422

(stored_state_path))

2423

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

2424

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

2425

os.rename(tempname, stored_state_path)

2426

except (IOError, OSError) as e:

2427

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

2428

.format(e))

2429

if not debug:

2430

try:

2431

os.remove(tempname)

2432

except NameError:

2433

pass

2434

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

2435

errno.EEXIST)):

2436

raise e

2437

2438

# Delete all clients, and settings from config

2439

1928

while tcp_server.clients:

2440

name, client = tcp_server.clients.popitem()

1929

client = tcp_server.clients.pop()

2441

1930

if use_dbus:

2442

1931

client.remove_from_connection()

1932

client.disable_hook = None

2443

1933

# Don't signal anything except ClientRemoved

2444

1934

client.disable(quiet=True)

2445

1935

if use_dbus:

2446

1936

# Emit D-Bus signal

2447

mandos_dbus_service.ClientRemoved(client

2448

.dbus_object_path,

1937

mandos_dbus_service.ClientRemoved(client.dbus_object_path,

2449

1938

client.name)

2450

client_settings.clear()

2451

1939

2452

1940

atexit.register(cleanup)

2453

1941

2454

for client in tcp_server.clients.itervalues():

1942

for client in tcp_server.clients:

2455

1943

if use_dbus:

2456

1944

# Emit D-Bus signal

2457

1945

mandos_dbus_service.ClientAdded(client.dbus_object_path)

2458

# Need to initiate checking of clients

2459

if client.enabled:

2460

client.init_checker()

1946

client.enable()

2461

1947

2462

1948

tcp_server.enable()

2463

1949

tcp_server.server_activate()

2465

1951

# Find out what port we got

2466

1952

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

2467

1953

if use_ipv6:

2468

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

1954

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

2469

1955

" flowinfo %d, scope_id %d"

2470

1956

% tcp_server.socket.getsockname())

2471

1957

else: # IPv4

2472

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

1958

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

2473

1959

% tcp_server.socket.getsockname())

2474

1960

2475

1961

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

2478

1964

# From the Avahi example code

2479

1965

try:

2480

1966

service.activate()

2481

except dbus.exceptions.DBusException as error:

2482

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

1967

except dbus.exceptions.DBusException, error:

1968

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

2483

1969

cleanup()

2484

1970

sys.exit(1)

2485

1971

# End of Avahi example code

2489

1975

(tcp_server.handle_request

2490

1976

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

2491

1977

2492

logger.debug("Starting main loop")

1978

logger.debug(u"Starting main loop")

2493

1979

main_loop.run()

2494

except AvahiError as error:

2495

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

1980

except AvahiError, error:

1981

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

2496

1982

cleanup()

2497

1983

sys.exit(1)

2498

1984

except KeyboardInterrupt:

2499

1985

if debug:

2500

print("", file=sys.stderr)

2501

logger.debug("Server received KeyboardInterrupt")

2502

logger.debug("Server exiting")

1986

print >> sys.stderr

1987

logger.debug(u"Server received KeyboardInterrupt")

1988

logger.debug(u"Server exiting")

2503

1989

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

2504

1990

cleanup()

2505

1991