/mandos/trunk : revision 24.1.186

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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_builtins 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 cPickle as pickle

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import multiprocessing

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import types

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import binascii

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import tempfile

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import itertools

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import collections

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import dbus

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import dbus.service

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except ImportError:

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SO_BINDTODEVICE = None

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version = "1.6.2"

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stored_state_file = "clients.pickle"

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logger = logging.getLogger()

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version = "1.3.1"

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#logger = logging.getLogger('mandos')

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logger = logging.Logger('mandos')

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syslogger = (logging.handlers.SysLogHandler

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(facility = logging.handlers.SysLogHandler.LOG_DAEMON,

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

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

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self.gnupgargs = ['--batch',

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'--home', self.tempdir,

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'--force-mdc',

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'--quiet',

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'--no-use-agent']

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def __enter__(self):

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return self

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

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self._cleanup()

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return False

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def __del__(self):

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self._cleanup()

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def _cleanup(self):

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if self.tempdir is not None:

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# Delete contents of tempdir

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

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topdown = False):

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for filename in files:

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

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for dirname in dirs:

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

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# Remove tempdir

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os.rmdir(self.tempdir)

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self.tempdir = None

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def password_encode(self, password):

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

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

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encoded = b"mandos" + binascii.hexlify(password)

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if len(encoded) > 2048:

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# GnuPG can't handle long passwords, so encode differently

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encoded = (b"mandos" + password.replace(b"\\", b"\\\\")

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.replace(b"\n", b"\\n")

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.replace(b"\0", b"\\x00"))

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return encoded

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def encrypt(self, data, password):

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passphrase = self.password_encode(password)

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with tempfile.NamedTemporaryFile(dir=self.tempdir

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) as passfile:

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passfile.write(passphrase)

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passfile.flush()

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proc = subprocess.Popen(['gpg', '--symmetric',

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'--passphrase-file',

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passfile.name]

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+ self.gnupgargs,

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stdin = subprocess.PIPE,

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stdout = subprocess.PIPE,

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stderr = subprocess.PIPE)

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ciphertext, err = proc.communicate(input = data)

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if proc.returncode != 0:

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raise PGPError(err)

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return ciphertext

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def decrypt(self, data, password):

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passphrase = self.password_encode(password)

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with tempfile.NamedTemporaryFile(dir = self.tempdir

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) as passfile:

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passfile.write(passphrase)

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passfile.flush()

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proc = subprocess.Popen(['gpg', '--decrypt',

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'--passphrase-file',

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passfile.name]

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+ self.gnupgargs,

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stdin = subprocess.PIPE,

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stdout = subprocess.PIPE,

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stderr = subprocess.PIPE)

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decrypted_plaintext, err = proc.communicate(input

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= data)

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if proc.returncode != 0:

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raise PGPError(err)

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return decrypted_plaintext

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syslogger.setFormatter(logging.Formatter

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

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' %(message)s'))

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logger.addHandler(syslogger)

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console = logging.StreamHandler()

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

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' %(levelname)s:'

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' %(message)s'))

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logger.addHandler(console)

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class AvahiError(Exception):

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

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Used to optionally bind to the specified interface.

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name: string; Example: 'Mandos'

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

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See <https://www.iana.org/assignments/service-names-port-numbers>

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See <http://www.dns-sd.org/ServiceTypes.html>

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port: integer; what port to announce

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TXT: list of strings; TXT record for the service

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domain: string; Domain to publish on, default to .local if empty.

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server: D-Bus Server

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bus: dbus.SystemBus()

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"""

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def __init__(self, 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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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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" 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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self.name = unicode(self.server.GetAlternativeServiceName(self.name))

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

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self.name)

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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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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("D-Bus Exception", exc_info=error)

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

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self.cleanup()

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os._exit(1)

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self.rename_count += 1

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def remove(self):

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

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if self.entry_group_state_changed_match is not None:

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self.entry_group_state_changed_match = 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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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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'StateChanged', self .entry_group_state_changed))

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

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self.name, self.type)

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self.group.AddService(

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dbus.UInt16(self.port),

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avahi.string_array_to_txt_array(self.TXT))

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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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elif state == avahi.ENTRY_GROUP_FAILURE:

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

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unicode(error))

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raise AvahiGroupError("State changed: {0!s}"

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.format(error))

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raise AvahiGroupError("State changed: %s"

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% unicode(error))

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def cleanup(self):

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

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if self.group is not None:

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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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dbus.exceptions.DBusException) as e:

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pass

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

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

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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_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 ({0}) [%(process)d]:'

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

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.format(self.name)))

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return ret

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def timedelta_to_milliseconds(td):

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

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

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

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

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

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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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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, -2 means no checker completed yet.

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

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last_enabled: datetime.datetime(); (UTC)

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

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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 secret has been sent

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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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server_settings: The server_settings dict from main()

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"""

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runtime_expansions = ("approval_delay", "approval_duration",

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

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

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"last_approval_request", "last_checked_ok",

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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": "PT5M",

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"extended_timeout": "PT15M",

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"interval": "PT2M",

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

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"host": "",

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"approval_delay": "PT0S",

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"approval_duration": "PT1S",

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"approved_by_default": "True",

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"enabled": "True",

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}

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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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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 _timedelta_to_milliseconds(self.extended_timeout)

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def interval_milliseconds(self):

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"Return the 'interval' attribute in milliseconds"

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return timedelta_to_milliseconds(self.interval)

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return _timedelta_to_milliseconds(self.interval)

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def approval_delay_milliseconds(self):

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return timedelta_to_milliseconds(self.approval_delay)

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@staticmethod

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def config_parser(config):

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

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

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with exceptions for any special settings as defined above.

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

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value given the same arguments.

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"""

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settings = {}

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for client_name in config.sections():

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section = dict(config.items(client_name))

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client = settings[client_name] = {}

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

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# Reformat values from string types to Python types

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client["approved_by_default"] = config.getboolean(

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client_name, "approved_by_default")

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

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"enabled")

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

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.replace(" ", ""))

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if "secret" in section:

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

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elif "secfile" in section:

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

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(section["secfile"])),

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"rb") as secfile:

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

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else:

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raise TypeError("No secret or secfile for section {0}"

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.format(section))

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

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client["extended_timeout"] = string_to_delta(

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section["extended_timeout"])

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

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client["approval_delay"] = string_to_delta(

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section["approval_delay"])

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client["approval_duration"] = string_to_delta(

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section["approval_duration"])

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

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client["last_approval_request"] = None

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client["last_checked_ok"] = None

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client["last_checker_status"] = -2

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return settings

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

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return _timedelta_to_milliseconds(self.approval_delay)

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

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

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

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attribute."""

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self.name = name

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if server_settings is None:

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server_settings = {}

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self.server_settings = server_settings

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# adding all client settings

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for setting, value in settings.iteritems():

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setattr(self, setting, value)

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if self.enabled:

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if not hasattr(self, "last_enabled"):

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self.last_enabled = datetime.datetime.utcnow()

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if not hasattr(self, "expires"):

543

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

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+ self.timeout)

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else:

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self.last_enabled = None

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self.expires = None

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if config is None:

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config = {}

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

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# Uppercase and remove spaces from fingerprint for later

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# comparison purposes with return value from the fingerprint()

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# function

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

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.replace(" ", ""))

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

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

555

datetime.datetime.utcnow())

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# attributes specific for this server instance

347

if "secret" in config:

348

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

349

elif "secfile" in config:

350

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

351

(config["secfile"])),

352

"rb") as secfile:

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self.secret = secfile.read()

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else:

355

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

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% self.name)

357

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

358

self.created = datetime.datetime.utcnow()

359

self.enabled = False

360

self.last_approval_request = None

361

self.last_enabled = None

362

self.last_checked_ok = None

363

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

364

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

365

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

366

self.disable_hook = disable_hook

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self.checker = None

559

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self.checker_initiator_tag = None

560

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self.disable_initiator_tag = None

370

self.expires = None

561

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self.checker_callback_tag = None

372

self.checker_command = config["checker"]

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self.current_checker_command = None

563

self.approved = None

374

self.last_connect = None

375

self._approved = None

376

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

377

True)

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self.approvals_pending = 0

565

self.changedstate = (multiprocessing_manager

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.Condition(multiprocessing_manager

567

.Lock()))

568

self.client_structure = [attr for attr in

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self.__dict__.iterkeys()

570

if not attr.startswith("_")]

571

self.client_structure.append("client_structure")

572

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

574

lambda obj:

575

isinstance(obj,

576

property)):

577

if not name.startswith("_"):

578

self.client_structure.append(name)

379

self.approval_delay = string_to_delta(

380

config["approval_delay"])

381

self.approval_duration = string_to_delta(

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config["approval_duration"])

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

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# Send notice to process children that client state has changed

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385

def send_changedstate(self):

582

with self.changedstate:

583

self.changedstate.notify_all()

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386

self.changedstate.acquire()

387

self.changedstate.notify_all()

388

self.changedstate.release()

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390

def enable(self):

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

587

392

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

588

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# Already enabled

589

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return

395

self.send_changedstate()

396

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

397

# and every interval from then on.

398

self.checker_initiator_tag = (gobject.timeout_add

399

(self.interval_milliseconds(),

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self.start_checker))

401

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

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

403

self.disable_initiator_tag = (gobject.timeout_add

404

(self.timeout_milliseconds(),

405

self.disable))

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self.enabled = True

592

407

self.last_enabled = datetime.datetime.utcnow()

593

self.init_checker()

594

self.send_changedstate()

408

# Also start a new checker *right now*.

409

self.start_checker()

595

410

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411

def disable(self, quiet=True):

597

412

"""Disable this client."""

598

413

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

599

414

return False

600

415

if not quiet:

416

self.send_changedstate()

417

if not quiet:

601

418

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

602

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

419

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

603

420

gobject.source_remove(self.disable_initiator_tag)

604

421

self.disable_initiator_tag = None

605

422

self.expires = None

606

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

423

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

607

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gobject.source_remove(self.checker_initiator_tag)

608

425

self.checker_initiator_tag = None

609

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self.stop_checker()

427

if self.disable_hook:

428

self.disable_hook(self)

610

429

self.enabled = False

611

if not quiet:

612

self.send_changedstate()

613

430

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

614

431

return False

615

432

616

433

def __del__(self):

434

self.disable_hook = None

617

435

self.disable()

618

436

619

def init_checker(self):

620

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

621

# and every interval from then on.

622

if self.checker_initiator_tag is not None:

623

gobject.source_remove(self.checker_initiator_tag)

624

self.checker_initiator_tag = (gobject.timeout_add

625

(self.interval_milliseconds(),

626

self.start_checker))

627

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

628

if self.disable_initiator_tag is not None:

629

gobject.source_remove(self.disable_initiator_tag)

630

self.disable_initiator_tag = (gobject.timeout_add

631

(self.timeout_milliseconds(),

632

self.disable))

633

# Also start a new checker *right now*.

634

self.start_checker()

635

636

437

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

637

438

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

638

439

self.checker_callback_tag = None

639

440

self.checker = None

640

441

if os.WIFEXITED(condition):

641

self.last_checker_status = os.WEXITSTATUS(condition)

642

if self.last_checker_status == 0:

442

exitstatus = os.WEXITSTATUS(condition)

443

if exitstatus == 0:

643

444

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

644

445

vars(self))

645

446

self.checked_ok()

647

448

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

648

449

vars(self))

649

450

else:

650

self.last_checker_status = -1

651

451

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

652

452

vars(self))

653

453

654

def checked_ok(self):

655

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

656

self.last_checked_ok = datetime.datetime.utcnow()

657

self.last_checker_status = 0

658

self.bump_timeout()

659

660

def bump_timeout(self, timeout=None):

661

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

454

def checked_ok(self, timeout=None):

455

"""Bump up the timeout for this client.

456

457

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

458

alive and well.

459

"""

662

460

if timeout is None:

663

461

timeout = self.timeout

664

if self.disable_initiator_tag is not None:

665

gobject.source_remove(self.disable_initiator_tag)

666

self.disable_initiator_tag = None

667

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

668

self.disable_initiator_tag = (gobject.timeout_add

669

(timedelta_to_milliseconds

670

(timeout), self.disable))

671

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

462

self.last_checked_ok = datetime.datetime.utcnow()

463

gobject.source_remove(self.disable_initiator_tag)

464

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

465

self.disable_initiator_tag = (gobject.timeout_add

466

(_timedelta_to_milliseconds(timeout),

467

self.disable))

672

468

673

469

def need_approval(self):

674

470

self.last_approval_request = datetime.datetime.utcnow()

679

475

If a checker already exists, leave it running and do

680

476

nothing."""

681

477

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

682

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

683

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

684

# would inevitably timeout, since no checker would get a

685

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

478

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

479

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

480

# client would inevitably timeout, since no checker would get

481

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

686

482

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

687

483

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

688

484

# should be.

690

486

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

691

487

try:

692

488

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

693

except AttributeError:

694

pass

695

except OSError as error:

696

if error.errno != errno.ECHILD:

697

raise

489

except (AttributeError, OSError) as error:

490

if (isinstance(error, OSError)

491

and error.errno != errno.ECHILD):

492

raise error

698

493

else:

699

494

if pid:

700

495

logger.warning("Checker was a zombie")

703

498

self.current_checker_command)

704

499

# Start a new checker if needed

705

500

if self.checker is None:

706

# Escape attributes for the shell

707

escaped_attrs = dict(

708

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

709

for attr in

710

self.runtime_expansions)

711

501

try:

712

command = self.checker_command % escaped_attrs

713

except TypeError as error:

714

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

715

self.checker_command, exc_info=error)

716

return True # Try again later

502

# In case checker_command has exactly one % operator

503

command = self.checker_command % self.host

504

except TypeError:

505

# Escape attributes for the shell

506

escaped_attrs = dict(

507

(attr,

508

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

509

errors=

510

'replace')))

511

for attr in

512

self.runtime_expansions)

513

514

try:

515

command = self.checker_command % escaped_attrs

516

except TypeError as error:

517

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

518

' %s', self.checker_command, error)

519

return True # Try again later

717

520

self.current_checker_command = command

718

521

try:

719

522

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

722

525

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

723

526

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

724

527

# always replaced by /dev/null.)

725

# The exception is when not debugging but nevertheless

726

# running in the foreground; use the previously

727

# created wnull.

728

popen_args = {}

729

if (not self.server_settings["debug"]

730

and self.server_settings["foreground"]):

731

popen_args.update({"stdout": wnull,

732

"stderr": wnull })

733

528

self.checker = subprocess.Popen(command,

734

529

close_fds=True,

735

shell=True, cwd="/",

736

**popen_args)

737

except OSError as error:

738

logger.error("Failed to start subprocess",

739

exc_info=error)

740

return True

741

self.checker_callback_tag = (gobject.child_watch_add

742

(self.checker.pid,

743

self.checker_callback,

744

data=command))

745

# The checker may have completed before the gobject

746

# watch was added. Check for this.

747

try:

530

shell=True, cwd="/")

531

self.checker_callback_tag = (gobject.child_watch_add

532

(self.checker.pid,

533

self.checker_callback,

534

data=command))

535

# The checker may have completed before the gobject

536

# watch was added. Check for this.

748

537

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

538

if pid:

539

gobject.source_remove(self.checker_callback_tag)

540

self.checker_callback(pid, status, command)

749

541

except OSError as error:

750

if error.errno == errno.ECHILD:

751

# This should never happen

752

logger.error("Child process vanished",

753

exc_info=error)

754

return True

755

raise

756

if pid:

757

gobject.source_remove(self.checker_callback_tag)

758

self.checker_callback(pid, status, command)

542

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

543

error)

759

544

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

760

545

return True

761

546

768

553

return

769

554

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

770

555

try:

771

self.checker.terminate()

556

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

772

557

#time.sleep(0.5)

773

558

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

774

# self.checker.kill()

559

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

775

560

except OSError as error:

776

561

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

777

562

raise

794

579

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

795

580

if byte_arrays and signature != "ay":

796

581

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

797

" signature {0!r}".format(signature))

582

" signature %r" % signature)

798

583

def decorator(func):

799

584

func._dbus_is_property = True

800

585

func._dbus_interface = dbus_interface

808

593

return decorator

809

594

810

595

811

def dbus_interface_annotations(dbus_interface):

812

"""Decorator for marking functions returning interface annotations

813

814

Usage:

815

816

@dbus_interface_annotations("org.example.Interface")

817

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

818

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

819

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

820

"false"}

821

"""

822

def decorator(func):

823

func._dbus_is_interface = True

824

func._dbus_interface = dbus_interface

825

func._dbus_name = dbus_interface

826

return func

827

return decorator

828

829

830

def dbus_annotations(annotations):

831

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

832

Usage:

833

834

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

835

access="r")

836

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

837

"org.freedesktop.DBus.Property."

838

"EmitsChangedSignal": "false"})

839

def Property_dbus_property(self):

840

return dbus.Boolean(False)

841

"""

842

def decorator(func):

843

func._dbus_annotations = annotations

844

return func

845

return decorator

846

847

848

596

class DBusPropertyException(dbus.exceptions.DBusException):

849

597

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

850

598

"""

873

621

"""

874

622

875

623

@staticmethod

876

def _is_dbus_thing(thing):

877

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

878

879

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

880

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

881

"""

882

return lambda obj: getattr(obj, "_dbus_is_{0}".format(thing),

883

False)

624

def _is_dbus_property(obj):

625

return getattr(obj, "_dbus_is_property", False)

884

626

885

def _get_all_dbus_things(self, thing):

627

def _get_all_dbus_properties(self):

886

628

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

887

629

"""

888

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

889

name),

890

athing.__get__(self))

630

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

891

631

for cls in self.__class__.__mro__

892

for name, athing in

893

inspect.getmembers(cls,

894

self._is_dbus_thing(thing)))

632

for name, prop in inspect.getmembers(cls, self._is_dbus_property))

895

633

896

634

def _get_dbus_property(self, interface_name, property_name):

897

635

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

898

636

property with the specified name and interface.

899

637

"""

900

638

for cls in self.__class__.__mro__:

901

for name, value in (inspect.getmembers

902

(cls,

903

self._is_dbus_thing("property"))):

904

if (value._dbus_name == property_name

905

and value._dbus_interface == interface_name):

639

for name, value in inspect.getmembers(cls, self._is_dbus_property):

640

if value._dbus_name == property_name and value._dbus_interface == interface_name:

906

641

return value.__get__(self)

907

642

908

643

# No such property

909

644

raise DBusPropertyNotFound(self.dbus_object_path + ":"

910

645

+ interface_name + "."

911

646

+ property_name)

647

912

648

913

649

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

914

650

out_signature="v")

935

671

# signatures other than "ay".

936

672

if prop._dbus_signature != "ay":

937

673

raise ValueError

938

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

939

for byte in value))

674

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

675

for byte in value))

940

676

prop(value)

941

677

942

678

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

947

683

948

684

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

949

685

"""

950

properties = {}

951

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

686

all = {}

687

for name, prop in self._get_all_dbus_properties():

952

688

if (interface_name

953

689

and interface_name != prop._dbus_interface):

954

690

# Interface non-empty but did not match

958

694

continue

959

695

value = prop()

960

696

if not hasattr(value, "variant_level"):

961

properties[name] = value

697

all[name] = value

962

698

continue

963

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

964

value.variant_level+1)

965

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

699

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

700

value.variant_level+1)

701

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

966

702

967

703

@dbus.service.method(dbus.INTROSPECTABLE_IFACE,

968

704

out_signature="s",

969

705

path_keyword='object_path',

970

706

connection_keyword='connection')

971

707

def Introspect(self, object_path, connection):

972

"""Overloading of standard D-Bus method.

973

974

Inserts property tags and interface annotation tags.

708

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

975

709

"""

976

710

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

977

711

connection)

984

718

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

985

719

return e

986

720

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

987

# Add property tags

988

721

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

989

722

for name, prop

990

in self._get_all_dbus_things("property")

723

in self._get_all_dbus_properties()

991

724

if prop._dbus_interface

992

725

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

993

726

if_tag.appendChild(tag)

994

# Add annotation tags

995

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

996

for tag in if_tag.getElementsByTagName(typ):

997

annots = dict()

998

for name, prop in (self.

999

_get_all_dbus_things(typ)):

1000

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

1001

and prop._dbus_interface

1002

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

1003

annots.update(getattr

1004

(prop,

1005

"_dbus_annotations",

1006

{}))

1007

for name, value in annots.iteritems():

1008

ann_tag = document.createElement(

1009

"annotation")

1010

ann_tag.setAttribute("name", name)

1011

ann_tag.setAttribute("value", value)

1012

tag.appendChild(ann_tag)

1013

# Add interface annotation tags

1014

for annotation, value in dict(

1015

itertools.chain.from_iterable(

1016

annotations().iteritems()

1017

for name, annotations in

1018

self._get_all_dbus_things("interface")

1019

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

1020

)).iteritems():

1021

ann_tag = document.createElement("annotation")

1022

ann_tag.setAttribute("name", annotation)

1023

ann_tag.setAttribute("value", value)

1024

if_tag.appendChild(ann_tag)

1025

727

# Add the names to the return values for the

1026

728

# "org.freedesktop.DBus.Properties" methods

1027

729

if (if_tag.getAttribute("name")

1042

744

except (AttributeError, xml.dom.DOMException,

1043

745

xml.parsers.expat.ExpatError) as error:

1044

746

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

1045

exc_info=error)

747

error)

1046

748

return xmlstring

1047

749

1048

750

1049

def datetime_to_dbus(dt, variant_level=0):

751

def datetime_to_dbus (dt, variant_level=0):

1050

752

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

1051

753

if dt is None:

1052

754

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

1053

755

return dbus.String(dt.isoformat(),

1054

756

variant_level=variant_level)

1055

757

1056

1057

def alternate_dbus_interfaces(alt_interface_names, deprecate=True):

1058

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

1059

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

1060

interface names according to the "alt_interface_names" mapping.

1061

Usage:

1062

1063

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

1064

"net.example.AlternateInterface"})

1065

class SampleDBusObject(dbus.service.Object):

1066

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

1067

def SampleDBusMethod():

1068

pass

1069

1070

The above "SampleDBusMethod" on "SampleDBusObject" will be

1071

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

1072

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

1073

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

1074

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

1075

1076

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

1077

(from DBusObjectWithProperties) and interfaces (from the

1078

dbus_interface_annotations decorator).

1079

"""

1080

def wrapper(cls):

1081

for orig_interface_name, alt_interface_name in (

1082

alt_interface_names.iteritems()):

1083

attr = {}

1084

interface_names = set()

1085

# Go though all attributes of the class

1086

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

1087

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

1088

# with the wrong interface name

1089

if (not hasattr(attribute, "_dbus_interface")

1090

or not attribute._dbus_interface

1091

.startswith(orig_interface_name)):

1092

continue

1093

# Create an alternate D-Bus interface name based on

1094

# the current name

1095

alt_interface = (attribute._dbus_interface

1096

.replace(orig_interface_name,

1097

alt_interface_name))

1098

interface_names.add(alt_interface)

1099

# Is this a D-Bus signal?

1100

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

1101

# Extract the original non-method undecorated

1102

# function by black magic

1103

nonmethod_func = (dict(

1104

zip(attribute.func_code.co_freevars,

1105

attribute.__closure__))["func"]

1106

.cell_contents)

1107

# Create a new, but exactly alike, function

1108

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

1109

# with the alternate D-Bus interface name

1110

new_function = (dbus.service.signal

1111

(alt_interface,

1112

attribute._dbus_signature)

1113

(types.FunctionType(

1114

nonmethod_func.func_code,

1115

nonmethod_func.func_globals,

1116

nonmethod_func.func_name,

1117

nonmethod_func.func_defaults,

1118

nonmethod_func.func_closure)))

1119

# Copy annotations, if any

1120

try:

1121

new_function._dbus_annotations = (

1122

dict(attribute._dbus_annotations))

1123

except AttributeError:

1124

pass

1125

# Define a creator of a function to call both the

1126

# original and alternate functions, so both the

1127

# original and alternate signals gets sent when

1128

# the function is called

1129

def fixscope(func1, func2):

1130

"""This function is a scope container to pass

1131

func1 and func2 to the "call_both" function

1132

outside of its arguments"""

1133

def call_both(*args, **kwargs):

1134

"""This function will emit two D-Bus

1135

signals by calling func1 and func2"""

1136

func1(*args, **kwargs)

1137

func2(*args, **kwargs)

1138

return call_both

1139

# Create the "call_both" function and add it to

1140

# the class

1141

attr[attrname] = fixscope(attribute, new_function)

1142

# Is this a D-Bus method?

1143

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

1144

# Create a new, but exactly alike, function

1145

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

1146

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

1147

# to the class.

1148

attr[attrname] = (dbus.service.method

1149

(alt_interface,

1150

attribute._dbus_in_signature,

1151

attribute._dbus_out_signature)

1152

(types.FunctionType

1153

(attribute.func_code,

1154

attribute.func_globals,

1155

attribute.func_name,

1156

attribute.func_defaults,

1157

attribute.func_closure)))

1158

# Copy annotations, if any

1159

try:

1160

attr[attrname]._dbus_annotations = (

1161

dict(attribute._dbus_annotations))

1162

except AttributeError:

1163

pass

1164

# Is this a D-Bus property?

1165

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

1166

# Create a new, but exactly alike, function

1167

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

1168

# property with the alternate D-Bus interface

1169

# name. Add it to the class.

1170

attr[attrname] = (dbus_service_property

1171

(alt_interface,

1172

attribute._dbus_signature,

1173

attribute._dbus_access,

1174

attribute

1175

._dbus_get_args_options

1176

["byte_arrays"])

1177

(types.FunctionType

1178

(attribute.func_code,

1179

attribute.func_globals,

1180

attribute.func_name,

1181

attribute.func_defaults,

1182

attribute.func_closure)))

1183

# Copy annotations, if any

1184

try:

1185

attr[attrname]._dbus_annotations = (

1186

dict(attribute._dbus_annotations))

1187

except AttributeError:

1188

pass

1189

# Is this a D-Bus interface?

1190

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

1191

# Create a new, but exactly alike, function

1192

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

1193

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

1194

# to the class.

1195

attr[attrname] = (dbus_interface_annotations

1196

(alt_interface)

1197

(types.FunctionType

1198

(attribute.func_code,

1199

attribute.func_globals,

1200

attribute.func_name,

1201

attribute.func_defaults,

1202

attribute.func_closure)))

1203

if deprecate:

1204

# Deprecate all alternate interfaces

1205

iname="_AlternateDBusNames_interface_annotation{0}"

1206

for interface_name in interface_names:

1207

@dbus_interface_annotations(interface_name)

1208

def func(self):

1209

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

1210

"true" }

1211

# Find an unused name

1212

for aname in (iname.format(i)

1213

for i in itertools.count()):

1214

if aname not in attr:

1215

attr[aname] = func

1216

break

1217

if interface_names:

1218

# Replace the class with a new subclass of it with

1219

# methods, signals, etc. as created above.

1220

cls = type(b"{0}Alternate".format(cls.__name__),

1221

(cls,), attr)

1222

return cls

1223

return wrapper

1224

1225

1226

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

1227

"se.bsnet.fukt.Mandos"})

758

class transitional_dbus_metaclass(DBusObjectWithProperties.__metaclass__):

759

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

760

for attrname, old_dbusobj in inspect.getmembers(bases[0]):

761

new_interface = getattr(old_dbusobj, "_dbus_interface", "").replace("se.bsnet.fukt.", "se.recompile.")

762

if (getattr(old_dbusobj, "_dbus_is_signal", False)

763

and old_dbusobj._dbus_interface.startswith("se.bsnet.fukt.Mandos")):

764

unwrappedfunc = dict(zip(old_dbusobj.func_code.co_freevars,

765

old_dbusobj.__closure__))["func"].cell_contents

766

newfunc = types.FunctionType(unwrappedfunc.func_code,

767

unwrappedfunc.func_globals,

768

unwrappedfunc.func_name,

769

unwrappedfunc.func_defaults,

770

unwrappedfunc.func_closure)

771

new_dbusfunc = dbus.service.signal(

772

new_interface, old_dbusobj._dbus_signature)(newfunc)

773

attr["_transitional_" + attrname] = new_dbusfunc

774

775

def fixscope(func1, func2):

776

def newcall(*args, **kwargs):

777

func1(*args, **kwargs)

778

func2(*args, **kwargs)

779

return newcall

780

781

attr[attrname] = fixscope(old_dbusobj, new_dbusfunc)

782

783

elif (getattr(old_dbusobj, "_dbus_is_method", False)

784

and old_dbusobj._dbus_interface.startswith("se.bsnet.fukt.Mandos")):

785

new_dbusfunc = (dbus.service.method

786

(new_interface,

787

old_dbusobj._dbus_in_signature,

788

old_dbusobj._dbus_out_signature)

789

(types.FunctionType

790

(old_dbusobj.func_code,

791

old_dbusobj.func_globals,

792

old_dbusobj.func_name,

793

old_dbusobj.func_defaults,

794

old_dbusobj.func_closure)))

795

796

attr[attrname] = new_dbusfunc

797

elif (getattr(old_dbusobj, "_dbus_is_property", False)

798

and old_dbusobj._dbus_interface.startswith("se.bsnet.fukt.Mandos")):

799

new_dbusfunc = (dbus_service_property

800

(new_interface,

801

old_dbusobj._dbus_signature,

802

old_dbusobj._dbus_access,

803

old_dbusobj._dbus_get_args_options["byte_arrays"])

804

(types.FunctionType

805

(old_dbusobj.func_code,

806

old_dbusobj.func_globals,

807

old_dbusobj.func_name,

808

old_dbusobj.func_defaults,

809

old_dbusobj.func_closure)))

810

811

attr[attrname] = new_dbusfunc

812

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

813

1228

814

class ClientDBus(Client, DBusObjectWithProperties):

1229

815

"""A Client class using D-Bus

1230

816

1239

825

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

1240

826

1241

827

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

828

self._approvals_pending = 0

1242

829

self.bus = bus

1243

830

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

1244

831

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

1250

837

("/clients/" + client_object_name))

1251

838

DBusObjectWithProperties.__init__(self, self.bus,

1252

839

self.dbus_object_path)

1253

840

1254

841

def notifychangeproperty(transform_func,

1255

842

dbus_name, type_func=lambda x: x,

1256

843

variant_level=1):

1257

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

1258

its changes to DBus.

1259

1260

transform_fun: Function that takes a value and a variant_level

1261

and transforms it to a D-Bus type.

1262

dbus_name: D-Bus name of the variable

844

""" Modify a variable so that its a property that announce its

845

changes to DBus.

846

transform_fun: Function that takes a value and transform it to

847

DBus type.

848

dbus_name: DBus name of the variable

1263

849

type_func: Function that transform the value before sending it

1264

to the D-Bus. Default: no transform

1265

variant_level: D-Bus variant level. Default: 1

850

to DBus

851

variant_level: DBus variant level. default: 1

1266

852

"""

1267

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

853

real_value = [None,]

1268

854

def setter(self, value):

855

old_value = real_value[0]

856

real_value[0] = value

1269

857

if hasattr(self, "dbus_object_path"):

1270

if (not hasattr(self, attrname) or

1271

type_func(getattr(self, attrname, None))

1272

!= type_func(value)):

1273

dbus_value = transform_func(type_func(value),

1274

variant_level

1275

=variant_level)

858

if type_func(old_value) != type_func(real_value[0]):

859

dbus_value = transform_func(type_func(real_value[0]),

860

variant_level)

1276

861

self.PropertyChanged(dbus.String(dbus_name),

1277

862

dbus_value)

1278

setattr(self, attrname, value)

1279

863

1280

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

864

return property(lambda self: real_value[0], setter)

865

1281

866

1282

867

expires = notifychangeproperty(datetime_to_dbus, "Expires")

1283

868

approvals_pending = notifychangeproperty(dbus.Boolean,

1287

872

last_enabled = notifychangeproperty(datetime_to_dbus,

1288

873

"LastEnabled")

1289

874

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

1290

type_func = lambda checker:

1291

checker is not None)

875

type_func = lambda checker: checker is not None)

1292

876

last_checked_ok = notifychangeproperty(datetime_to_dbus,

1293

877

"LastCheckedOK")

1294

last_checker_status = notifychangeproperty(dbus.Int16,

1295

"LastCheckerStatus")

1296

last_approval_request = notifychangeproperty(

1297

datetime_to_dbus, "LastApprovalRequest")

878

last_approval_request = notifychangeproperty(datetime_to_dbus,

879

"LastApprovalRequest")

1298

880

approved_by_default = notifychangeproperty(dbus.Boolean,

1299

881

"ApprovedByDefault")

1300

approval_delay = notifychangeproperty(dbus.UInt64,

1301

"ApprovalDelay",

1302

type_func =

1303

timedelta_to_milliseconds)

1304

approval_duration = notifychangeproperty(

1305

dbus.UInt64, "ApprovalDuration",

1306

type_func = timedelta_to_milliseconds)

882

approval_delay = notifychangeproperty(dbus.UInt16, "ApprovalDelay",

883

type_func = _timedelta_to_milliseconds)

884

approval_duration = notifychangeproperty(dbus.UInt16, "ApprovalDuration",

885

type_func = _timedelta_to_milliseconds)

1307

886

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

1308

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

1309

type_func =

1310

timedelta_to_milliseconds)

1311

extended_timeout = notifychangeproperty(

1312

dbus.UInt64, "ExtendedTimeout",

1313

type_func = timedelta_to_milliseconds)

1314

interval = notifychangeproperty(dbus.UInt64,

1315

"Interval",

1316

type_func =

1317

timedelta_to_milliseconds)

887

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

888

type_func = _timedelta_to_milliseconds)

889

extended_timeout = notifychangeproperty(dbus.UInt16, "ExtendedTimeout",

890

type_func = _timedelta_to_milliseconds)

891

interval = notifychangeproperty(dbus.UInt16, "Interval",

892

type_func = _timedelta_to_milliseconds)

1318

893

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

1319

894

1320

895

del notifychangeproperty

1362

937

return r

1363

938

1364

939

def _reset_approved(self):

1365

self.approved = None

940

self._approved = None

1366

941

return False

1367

942

1368

943

def approve(self, value=True):

1369

self.approved = value

1370

gobject.timeout_add(timedelta_to_milliseconds

944

self.send_changedstate()

945

self._approved = value

946

gobject.timeout_add(_timedelta_to_milliseconds

1371

947

(self.approval_duration),

1372

948

self._reset_approved)

1373

self.send_changedstate()

949

1374

950

1375

951

## D-Bus methods, signals & properties

1376

_interface = "se.recompile.Mandos.Client"

1377

1378

## Interfaces

1379

1380

@dbus_interface_annotations(_interface)

1381

def _foo(self):

1382

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

1383

"false"}

1384

952

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

953

1385

954

## Signals

1386

955

1387

956

# CheckerCompleted - signal

1486

1055

access="readwrite")

1487

1056

def ApprovalDuration_dbus_property(self, value=None):

1488

1057

if value is None: # get

1489

return dbus.UInt64(timedelta_to_milliseconds(

1058

return dbus.UInt64(_timedelta_to_milliseconds(

1490

1059

self.approval_duration))

1491

1060

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

1492

1061

1506

1075

def Host_dbus_property(self, value=None):

1507

1076

if value is None: # get

1508

1077

return dbus.String(self.host)

1509

self.host = unicode(value)

1078

self.host = value

1510

1079

1511

1080

# Created - property

1512

1081

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

1513

1082

def Created_dbus_property(self):

1514

return datetime_to_dbus(self.created)

1083

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

1515

1084

1516

1085

# LastEnabled - property

1517

1086

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

1538

1107

return

1539

1108

return datetime_to_dbus(self.last_checked_ok)

1540

1109

1541

# LastCheckerStatus - property

1542

@dbus_service_property(_interface, signature="n",

1543

access="read")

1544

def LastCheckerStatus_dbus_property(self):

1545

return dbus.Int16(self.last_checker_status)

1546

1547

1110

# Expires - property

1548

1111

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

1549

1112

def Expires_dbus_property(self):

1560

1123

def Timeout_dbus_property(self, value=None):

1561

1124

if value is None: # get

1562

1125

return dbus.UInt64(self.timeout_milliseconds())

1563

old_timeout = self.timeout

1564

1126

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

1565

# Reschedule disabling

1566

if self.enabled:

1567

now = datetime.datetime.utcnow()

1568

self.expires += self.timeout - old_timeout

1569

if self.expires <= now:

1570

# The timeout has passed

1571

self.disable()

1572

else:

1573

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

1574

is None):

1575

return

1576

gobject.source_remove(self.disable_initiator_tag)

1577

self.disable_initiator_tag = (

1578

gobject.timeout_add(

1579

timedelta_to_milliseconds(self.expires - now),

1580

self.disable))

1127

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

1128

return

1129

# Reschedule timeout

1130

gobject.source_remove(self.disable_initiator_tag)

1131

self.disable_initiator_tag = None

1132

self.expires = None

1133

time_to_die = (self.

1134

_timedelta_to_milliseconds((self

1135

.last_checked_ok

1136

+ self.timeout)

1137

- datetime.datetime

1138

.utcnow()))

1139

if time_to_die <= 0:

1140

# The timeout has passed

1141

self.disable()

1142

else:

1143

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

1144

+ datetime.timedelta(milliseconds = time_to_die))

1145

self.disable_initiator_tag = (gobject.timeout_add

1146

(time_to_die, self.disable))

1581

1147

1582

1148

# ExtendedTimeout - property

1583

1149

@dbus_service_property(_interface, signature="t",

1596

1162

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

1597

1163

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

1598

1164

return

1599

if self.enabled:

1600

# Reschedule checker run

1601

gobject.source_remove(self.checker_initiator_tag)

1602

self.checker_initiator_tag = (gobject.timeout_add

1603

(value, self.start_checker))

1604

self.start_checker() # Start one now, too

1165

# Reschedule checker run

1166

gobject.source_remove(self.checker_initiator_tag)

1167

self.checker_initiator_tag = (gobject.timeout_add

1168

(value, self.start_checker))

1169

self.start_checker() # Start one now, too

1605

1170

1606

1171

# Checker - property

1607

1172

@dbus_service_property(_interface, signature="s",

1609

1174

def Checker_dbus_property(self, value=None):

1610

1175

if value is None: # get

1611

1176

return dbus.String(self.checker_command)

1612

self.checker_command = unicode(value)

1177

self.checker_command = value

1613

1178

1614

1179

# CheckerRunning - property

1615

1180

@dbus_service_property(_interface, signature="b",

1644

1209

raise KeyError()

1645

1210

1646

1211

def __getattribute__(self, name):

1647

if name == '_pipe':

1212

if(name == '_pipe'):

1648

1213

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

1649

1214

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

1650

1215

data = self._pipe.recv()

1657

1222

return func

1658

1223

1659

1224

def __setattr__(self, name, value):

1660

if name == '_pipe':

1225

if(name == '_pipe'):

1661

1226

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

1662

1227

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

1663

1228

1229

class ClientDBusTransitional(ClientDBus):

1230

__metaclass__ = transitional_dbus_metaclass

1664

1231

1665

1232

class ClientHandler(socketserver.BaseRequestHandler, object):

1666

1233

"""A class to handle client connections.

1703

1270

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

1704

1271

try:

1705

1272

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

1706

raise RuntimeError(line)

1273

raise RuntimeError

1707

1274

except (ValueError, IndexError, RuntimeError) as error:

1708

1275

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

1709

1276

return

1746

1313

client.name)

1747

1314

if self.server.use_dbus:

1748

1315

# Emit D-Bus signal

1749

client.Rejected("Disabled")

1316

client.Rejected("Disabled")

1750

1317

return

1751

1318

1752

if client.approved or not client.approval_delay:

1319

if client._approved or not client.approval_delay:

1753

1320

#We are approved or approval is disabled

1754

1321

break

1755

elif client.approved is None:

1322

elif client._approved is None:

1756

1323

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

1757

1324

client.name)

1758

1325

if self.server.use_dbus:

1769

1336

return

1770

1337

1771

1338

#wait until timeout or approved

1339

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

1772

1340

time = datetime.datetime.now()

1773

1341

client.changedstate.acquire()

1774

client.changedstate.wait(

1775

float(timedelta_to_milliseconds(delay)

1776

/ 1000))

1342

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

1777

1343

client.changedstate.release()

1778

1344

time2 = datetime.datetime.now()

1779

1345

if (time2 - time) >= delay:

1795

1361

try:

1796

1362

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

1797

1363

except gnutls.errors.GNUTLSError as error:

1798

logger.warning("gnutls send failed",

1799

exc_info=error)

1364

logger.warning("gnutls send failed")

1800

1365

return

1801

1366

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

1802

1367

sent, len(client.secret)

1804

1369

sent_size += sent

1805

1370

1806

1371

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

1807

# bump the timeout using extended_timeout

1808

client.bump_timeout(client.extended_timeout)

1372

# bump the timeout as if seen

1373

client.checked_ok(client.extended_timeout)

1809

1374

if self.server.use_dbus:

1810

1375

# Emit D-Bus signal

1811

1376

client.GotSecret()

1816

1381

try:

1817

1382

session.bye()

1818

1383

except gnutls.errors.GNUTLSError as error:

1819

logger.warning("GnuTLS bye failed",

1820

exc_info=error)

1384

logger.warning("GnuTLS bye failed")

1821

1385

1822

1386

@staticmethod

1823

1387

def peer_certificate(session):

1879

1443

# Convert the buffer to a Python bytestring

1880

1444

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

1881

1445

# Convert the bytestring to hexadecimal notation

1882

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

1446

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

1883

1447

return hex_fpr

1884

1448

1885

1449

1888

1452

def sub_process_main(self, request, address):

1889

1453

try:

1890

1454

self.finish_request(request, address)

1891

except Exception:

1455

except:

1892

1456

self.handle_error(request, address)

1893

1457

self.close_request(request)

1894

1458

1895

1459

def process_request(self, request, address):

1896

1460

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

1897

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

1898

args = (request, address))

1899

proc.start()

1900

return proc

1461

multiprocessing.Process(target = self.sub_process_main,

1462

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

1901

1463

1902

1464

1903

1465

class MultiprocessingMixInWithPipe(MultiprocessingMixIn, object):

1909

1471

"""

1910

1472

parent_pipe, self.child_pipe = multiprocessing.Pipe()

1911

1473

1912

proc = MultiprocessingMixIn.process_request(self, request,

1913

client_address)

1474

super(MultiprocessingMixInWithPipe,

1475

self).process_request(request, client_address)

1914

1476

self.child_pipe.close()

1915

self.add_pipe(parent_pipe, proc)

1477

self.add_pipe(parent_pipe)

1916

1478

1917

def add_pipe(self, parent_pipe, proc):

1479

def add_pipe(self, parent_pipe):

1918

1480

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

1919

raise NotImplementedError()

1481

raise NotImplementedError

1920

1482

1921

1483

1922

1484

class IPv6_TCPServer(MultiprocessingMixInWithPipe,

1929

1491

use_ipv6: Boolean; to use IPv6 or not

1930

1492

"""

1931

1493

def __init__(self, server_address, RequestHandlerClass,

1932

interface=None, use_ipv6=True, socketfd=None):

1933

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

1934

creating a new one with socket.socket().

1935

"""

1494

interface=None, use_ipv6=True):

1936

1495

self.interface = interface

1937

1496

if use_ipv6:

1938

1497

self.address_family = socket.AF_INET6

1939

if socketfd is not None:

1940

# Save the file descriptor

1941

self.socketfd = socketfd

1942

# Save the original socket.socket() function

1943

self.socket_socket = socket.socket

1944

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

1945

#

1946

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

1947

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

1948

# patching socket.socket.)

1949

#

1950

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

1951

@functools.wraps(socket.socket)

1952

def socket_wrapper(*args, **kwargs):

1953

# Restore original function so subsequent calls are

1954

# not affected.

1955

socket.socket = self.socket_socket

1956

del self.socket_socket

1957

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

1958

# saved file descriptor.

1959

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

1960

# Replace socket.socket() function with wrapper

1961

socket.socket = socket_wrapper

1962

# The socketserver.TCPServer.__init__ will call

1963

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

1964

# socket_wrapper(), if socketfd was set.

1965

1498

socketserver.TCPServer.__init__(self, server_address,

1966

1499

RequestHandlerClass)

1967

1968

1500

def server_bind(self):

1969

1501

"""This overrides the normal server_bind() function

1970

1502

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

1978

1510

try:

1979

1511

self.socket.setsockopt(socket.SOL_SOCKET,

1980

1512

SO_BINDTODEVICE,

1981

str(self.interface + '\0'))

1513

str(self.interface

1514

+ '\0'))

1982

1515

except socket.error as error:

1983

if error.errno == errno.EPERM:

1984

logger.error("No permission to bind to"

1985

" interface %s", self.interface)

1986

elif error.errno == errno.ENOPROTOOPT:

1516

if error[0] == errno.EPERM:

1517

logger.error("No permission to"

1518

" bind to interface %s",

1519

self.interface)

1520

elif error[0] == errno.ENOPROTOOPT:

1987

1521

logger.error("SO_BINDTODEVICE not available;"

1988

1522

" cannot bind to interface %s",

1989

1523

self.interface)

1990

elif error.errno == errno.ENODEV:

1991

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

1992

" cannot bind", self.interface)

1993

1524

else:

1994

1525

raise

1995

1526

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

1998

1529

if self.address_family == socket.AF_INET6:

1999

1530

any_address = "::" # in6addr_any

2000

1531

else:

2001

any_address = "0.0.0.0" # INADDR_ANY

1532

any_address = socket.INADDR_ANY

2002

1533

self.server_address = (any_address,

2003

1534

self.server_address[1])

2004

1535

elif not self.server_address[1]:

2025

1556

"""

2026

1557

def __init__(self, server_address, RequestHandlerClass,

2027

1558

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

2028

gnutls_priority=None, use_dbus=True, socketfd=None):

1559

gnutls_priority=None, use_dbus=True):

2029

1560

self.enabled = False

2030

1561

self.clients = clients

2031

1562

if self.clients is None:

2032

self.clients = {}

1563

self.clients = set()

2033

1564

self.use_dbus = use_dbus

2034

1565

self.gnutls_priority = gnutls_priority

2035

1566

IPv6_TCPServer.__init__(self, server_address,

2036

1567

RequestHandlerClass,

2037

1568

interface = interface,

2038

use_ipv6 = use_ipv6,

2039

socketfd = socketfd)

1569

use_ipv6 = use_ipv6)

2040

1570

def server_activate(self):

2041

1571

if self.enabled:

2042

1572

return socketserver.TCPServer.server_activate(self)

2043

2044

1573

def enable(self):

2045

1574

self.enabled = True

2046

2047

def add_pipe(self, parent_pipe, proc):

1575

def add_pipe(self, parent_pipe):

2048

1576

# Call "handle_ipc" for both data and EOF events

2049

1577

gobject.io_add_watch(parent_pipe.fileno(),

2050

1578

gobject.IO_IN | gobject.IO_HUP,

2051

1579

functools.partial(self.handle_ipc,

2052

parent_pipe =

2053

parent_pipe,

2054

proc = proc))

2055

1580

parent_pipe = parent_pipe))

1581

2056

1582

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

2057

proc = None, client_object=None):

2058

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

2059

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

2060

# Wait for other process to exit

2061

proc.join()

1583

client_object=None):

1584

condition_names = {

1585

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

1586

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

1587

# blocking).

1588

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

1589

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

1590

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

1591

# broken, usually for pipes and

1592

# sockets).

1593

}

1594

conditions_string = ' | '.join(name

1595

for cond, name in

1596

condition_names.iteritems()

1597

if cond & condition)

1598

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

1599

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

2062

1600

return False

2063

1601

2064

1602

# Read a request from the child

2069

1607

fpr = request[1]

2070

1608

address = request[2]

2071

1609

2072

for c in self.clients.itervalues():

1610

for c in self.clients:

2073

1611

if c.fingerprint == fpr:

2074

1612

client = c

2075

1613

break

2078

1616

"dress: %s", fpr, address)

2079

1617

if self.use_dbus:

2080

1618

# Emit D-Bus signal

2081

mandos_dbus_service.ClientNotFound(fpr,

2082

address[0])

1619

mandos_dbus_service.ClientNotFound(fpr, address[0])

2083

1620

parent_pipe.send(False)

2084

1621

return False

2085

1622

2086

1623

gobject.io_add_watch(parent_pipe.fileno(),

2087

1624

gobject.IO_IN | gobject.IO_HUP,

2088

1625

functools.partial(self.handle_ipc,

2089

parent_pipe =

2090

parent_pipe,

2091

proc = proc,

2092

client_object =

2093

client))

1626

parent_pipe = parent_pipe,

1627

client_object = client))

2094

1628

parent_pipe.send(True)

2095

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

2096

# same fileno

1629

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

2097

1630

return False

2098

1631

if command == 'funcall':

2099

1632

funcname = request[1]

2100

1633

args = request[2]

2101

1634

kwargs = request[3]

2102

1635

2103

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

2104

funcname)(*args,

2105

**kwargs)))

1636

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

2106

1637

2107

1638

if command == 'getattr':

2108

1639

attrname = request[1]

2109

1640

if callable(client_object.__getattribute__(attrname)):

2110

1641

parent_pipe.send(('function',))

2111

1642

else:

2112

parent_pipe.send(('data', client_object

2113

.__getattribute__(attrname)))

1643

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

2114

1644

2115

1645

if command == 'setattr':

2116

1646

attrname = request[1]

2120

1650

return True

2121

1651

2122

1652

2123

def rfc3339_duration_to_delta(duration):

2124

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

2125

2126

>>> rfc3339_duration_to_delta("P7D")

2127

datetime.timedelta(7)

2128

>>> rfc3339_duration_to_delta("PT60S")

2129

datetime.timedelta(0, 60)

2130

>>> rfc3339_duration_to_delta("PT60M")

2131

datetime.timedelta(0, 3600)

2132

>>> rfc3339_duration_to_delta("PT24H")

2133

datetime.timedelta(1)

2134

>>> rfc3339_duration_to_delta("P1W")

2135

datetime.timedelta(7)

2136

>>> rfc3339_duration_to_delta("PT5M30S")

2137

datetime.timedelta(0, 330)

2138

>>> rfc3339_duration_to_delta("P1DT3M20S")

2139

datetime.timedelta(1, 200)

2140

"""

2141

2142

# Parsing an RFC 3339 duration with regular expressions is not

2143

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

2144

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

2145

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

2146

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

2147

# avoid excessive use of external libraries.

2148

2149

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

2150

Token = collections.namedtuple("Token",

2151

("regexp", # To match token; if

2152

# "value" is not None,

2153

# must have a "group"

2154

# containing digits

2155

"value", # datetime.timedelta or

2156

# None

2157

"followers")) # Tokens valid after

2158

# this token

2159

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

2160

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

2161

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

2162

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

2163

datetime.timedelta(seconds=1),

2164

frozenset((token_end,)))

2165

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

2166

datetime.timedelta(minutes=1),

2167

frozenset((token_second, token_end)))

2168

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

2169

datetime.timedelta(hours=1),

2170

frozenset((token_minute, token_end)))

2171

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

2172

None,

2173

frozenset((token_hour, token_minute,

2174

token_second)))

2175

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

2176

datetime.timedelta(days=1),

2177

frozenset((token_time, token_end)))

2178

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

2179

datetime.timedelta(weeks=4),

2180

frozenset((token_day, token_end)))

2181

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

2182

datetime.timedelta(weeks=52),

2183

frozenset((token_month, token_end)))

2184

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

2185

datetime.timedelta(weeks=1),

2186

frozenset((token_end,)))

2187

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

2188

frozenset((token_year, token_month,

2189

token_day, token_time,

2190

token_week))),

2191

# Define starting values

2192

value = datetime.timedelta() # Value so far

2193

found_token = None

2194

followers = frozenset(token_duration,) # Following valid tokens

2195

s = duration # String left to parse

2196

# Loop until end token is found

2197

while found_token is not token_end:

2198

# Search for any currently valid tokens

2199

for token in followers:

2200

match = token.regexp.match(s)

2201

if match is not None:

2202

# Token found

2203

if token.value is not None:

2204

# Value found, parse digits

2205

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

2206

# Add to value so far

2207

value += factor * token.value

2208

# Strip token from string

2209

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

2210

# Go to found token

2211

found_token = token

2212

# Set valid next tokens

2213

followers = found_token.followers

2214

break

2215

else:

2216

# No currently valid tokens were found

2217

raise ValueError("Invalid RFC 3339 duration")

2218

# End token found

2219

return value

2220

2221

2222

1653

def string_to_delta(interval):

2223

1654

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

2224

1655

2235

1666

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

2236

1667

datetime.timedelta(0, 330)

2237

1668

"""

2238

2239

try:

2240

return rfc3339_duration_to_delta(interval)

2241

except ValueError:

2242

pass

2243

2244

1669

timevalue = datetime.timedelta(0)

2245

1670

for s in interval.split():

2246

1671

try:

2257

1682

elif suffix == "w":

2258

1683

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

2259

1684

else:

2260

raise ValueError("Unknown suffix {0!r}"

2261

.format(suffix))

2262

except IndexError as e:

1685

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

1686

except (ValueError, IndexError) as e:

2263

1687

raise ValueError(*(e.args))

2264

1688

timevalue += delta

2265

1689

return timevalue

2266

1690

2267

1691

1692

def if_nametoindex(interface):

1693

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

1694

1695

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

1696

global if_nametoindex

1697

try:

1698

if_nametoindex = (ctypes.cdll.LoadLibrary

1699

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

1700

.if_nametoindex)

1701

except (OSError, AttributeError):

1702

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

1703

def if_nametoindex(interface):

1704

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

1705

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

1706

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

1707

ifreq = fcntl.ioctl(s, SIOCGIFINDEX,

1708

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

1709

interface))

1710

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

1711

ifreq[16:20])[0]

1712

return interface_index

1713

return if_nametoindex(interface)

1714

1715

2268

1716

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

2269

1717

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

2270

1718

2278

1726

sys.exit()

2279

1727

if not noclose:

2280

1728

# Close all standard open file descriptors

2281

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

1729

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

2282

1730

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

2283

1731

raise OSError(errno.ENODEV,

2284

"{0} not a character device"

2285

.format(os.devnull))

1732

"%s not a character device"

1733

% os.path.devnull)

2286

1734

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

2287

1735

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

2288

1736

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

2297

1745

2298

1746

parser = argparse.ArgumentParser()

2299

1747

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

2300

version = "%(prog)s {0}".format(version),

1748

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

2301

1749

help="show version number and exit")

2302

1750

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

2303

1751

help="Bind to interface IF")

2309

1757

help="Run self-test")

2310

1758

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

2311

1759

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

2312

" to terminal", default=None)

1760

" to terminal")

2313

1761

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

2314

1762

help="Debug level for stdout output")

2315

1763

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

2322

1770

" files")

2323

1771

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

2324

1772

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

2325

" system bus interface", default=None)

1773

" system bus interface")

2326

1774

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

2327

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

2328

default=None)

2329

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

2330

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

2331

" state", default=None)

2332

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

2333

help="Specify a file descriptor to a network"

2334

" socket to use instead of creating one")

2335

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

2336

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

2337

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

2338

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

2339

1775

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

2340

1776

options = parser.parse_args()

2341

1777

2342

1778

if options.check:

2350

1786

"port": "",

2351

1787

"debug": "False",

2352

1788

"priority":

2353

"SECURE256:!CTYPE-X.509:+CTYPE-OPENPGP:+SIGN-RSA-SHA224:+SIGN-RSA-RMD160",

1789

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

2354

1790

"servicename": "Mandos",

2355

1791

"use_dbus": "True",

2356

1792

"use_ipv6": "True",

2357

1793

"debuglevel": "",

2358

"restore": "True",

2359

"socket": "",

2360

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

2361

"foreground": "False",

2362

1794

}

2363

1795

2364

1796

# Parse config file for server-global settings

2369

1801

# Convert the SafeConfigParser object to a dict

2370

1802

server_settings = server_config.defaults()

2371

1803

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

2372

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

1804

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

2373

1805

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

2374

1806

option)

2375

1807

if server_settings["port"]:

2376

1808

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

2377

1809

"port")

2378

if server_settings["socket"]:

2379

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

2380

"socket")

2381

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

2382

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

2383

# happen with a supplied network socket.

2384

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

2385

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

2386

["socket"])

2387

1810

del server_config

2388

1811

2389

1812

# Override the settings from the config file with command line

2390

1813

# options, if set.

2391

1814

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

2392

1815

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

2393

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

2394

"statedir", "socket", "foreground"):

1816

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

2395

1817

value = getattr(options, option)

2396

1818

if value is not None:

2397

1819

server_settings[option] = value

2400

1822

for option in server_settings.keys():

2401

1823

if type(server_settings[option]) is str:

2402

1824

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

2403

# Force all boolean options to be boolean

2404

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

2405

"foreground"):

2406

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

2407

# Debug implies foreground

2408

if server_settings["debug"]:

2409

server_settings["foreground"] = True

2410

1825

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

2411

1826

2412

1827

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

2416

1831

debuglevel = server_settings["debuglevel"]

2417

1832

use_dbus = server_settings["use_dbus"]

2418

1833

use_ipv6 = server_settings["use_ipv6"]

2419

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

2420

stored_state_file)

2421

foreground = server_settings["foreground"]

2422

2423

if debug:

2424

initlogger(debug, logging.DEBUG)

2425

else:

2426

if not debuglevel:

2427

initlogger(debug)

2428

else:

2429

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

2430

initlogger(debug, level)

2431

1834

2432

1835

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

2433

1836

syslogger.setFormatter(logging.Formatter

2434

('Mandos ({0}) [%(process)d]:'

2435

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

2436

.format(server_settings

2437

["servicename"])))

1837

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

1838

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

1839

% server_settings["servicename"]))

2438

1840

2439

1841

# Parse config file with clients

2440

client_config = configparser.SafeConfigParser(Client

2441

.client_defaults)

1842

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

1843

"extended_timeout": "15m",

1844

"interval": "2m",

1845

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

1846

"host": "",

1847

"approval_delay": "0s",

1848

"approval_duration": "1s",

1849

}

1850

client_config = configparser.SafeConfigParser(client_defaults)

2442

1851

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

2443

1852

"clients.conf"))

2444

1853

2453

1862

use_ipv6=use_ipv6,

2454

1863

gnutls_priority=

2455

1864

server_settings["priority"],

2456

use_dbus=use_dbus,

2457

socketfd=(server_settings["socket"]

2458

or None))

2459

if not foreground:

2460

pidfilename = "/run/mandos.pid"

2461

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

2462

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

2463

pidfile = None

1865

use_dbus=use_dbus)

1866

if not debug:

1867

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

2464

1868

try:

2465

1869

pidfile = open(pidfilename, "w")

2466

except IOError as e:

2467

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

2468

exc_info=e)

1870

except IOError:

1871

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

2469

1872

2470

for name in ("_mandos", "mandos", "nobody"):

1873

try:

1874

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

1875

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

1876

except KeyError:

2471

1877

try:

2472

uid = pwd.getpwnam(name).pw_uid

2473

gid = pwd.getpwnam(name).pw_gid

2474

break

1878

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

1879

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

2475

1880

except KeyError:

2476

continue

2477

else:

2478

uid = 65534

2479

gid = 65534

1881

try:

1882

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

1883

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

1884

except KeyError:

1885

uid = 65534

1886

gid = 65534

2480

1887

try:

2481

1888

os.setgid(gid)

2482

1889

os.setuid(uid)

2483

1890

except OSError as error:

2484

if error.errno != errno.EPERM:

2485

raise

1891

if error[0] != errno.EPERM:

1892

raise error

1893

1894

if not debug and not debuglevel:

1895

syslogger.setLevel(logging.WARNING)

1896

console.setLevel(logging.WARNING)

1897

if debuglevel:

1898

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

1899

syslogger.setLevel(level)

1900

console.setLevel(level)

2486

1901

2487

1902

if debug:

2488

1903

# Enable all possible GnuTLS debugging

2499

1914

.gnutls_global_set_log_function(debug_gnutls))

2500

1915

2501

1916

# Redirect stdin so all checkers get /dev/null

2502

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

1917

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

2503

1918

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

2504

1919

if null > 2:

2505

1920

os.close(null)

1921

else:

1922

# No console logging

1923

logger.removeHandler(console)

2506

1924

2507

1925

# Need to fork before connecting to D-Bus

2508

if not foreground:

1926

if not debug:

2509

1927

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

2510

1928

daemon()

2511

1929

2512

# multiprocessing will use threads, so before we use gobject we

2513

# need to inform gobject that threads will be used.

2514

gobject.threads_init()

2515

2516

1930

global main_loop

2517

1931

# From the Avahi example code

2518

DBusGMainLoop(set_as_default=True)

1932

DBusGMainLoop(set_as_default=True )

2519

1933

main_loop = gobject.MainLoop()

2520

1934

bus = dbus.SystemBus()

2521

1935

# End of Avahi example code

2522

1936

if use_dbus:

2523

1937

try:

2524

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

2525

bus, do_not_queue=True)

2526

old_bus_name = (dbus.service.BusName

2527

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

2528

do_not_queue=True))

1938

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

1939

bus, do_not_queue=True)

1940

bus_name2 = dbus.service.BusName("se.recompile.Mandos",

1941

bus, do_not_queue=True)

2529

1942

except dbus.exceptions.NameExistsException as e:

2530

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

1943

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

2531

1944

use_dbus = False

2532

1945

server_settings["use_dbus"] = False

2533

1946

tcp_server.use_dbus = False

2534

1947

protocol = avahi.PROTO_INET6 if use_ipv6 else avahi.PROTO_INET

2535

service = AvahiServiceToSyslog(name =

2536

server_settings["servicename"],

2537

servicetype = "_mandos._tcp",

2538

protocol = protocol, bus = bus)

1948

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

1949

servicetype = "_mandos._tcp",

1950

protocol = protocol, bus = bus)

2539

1951

if server_settings["interface"]:

2540

1952

service.interface = (if_nametoindex

2541

1953

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

2545

1957

2546

1958

client_class = Client

2547

1959

if use_dbus:

2548

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

2549

2550

client_settings = Client.config_parser(client_config)

2551

old_client_settings = {}

2552

clients_data = {}

2553

2554

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

2555

global wnull

2556

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

2557

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

2558

# mode

2559

if debug or not foreground:

2560

wnull.close()

2561

2562

# Get client data and settings from last running state.

2563

if server_settings["restore"]:

2564

try:

2565

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

2566

clients_data, old_client_settings = (pickle.load

2567

(stored_state))

2568

os.remove(stored_state_path)

2569

except IOError as e:

2570

if e.errno == errno.ENOENT:

2571

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

2572

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

2573

else:

2574

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

2575

exc_info=e)

2576

raise

2577

except EOFError as e:

2578

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

2579

"EOFError:", exc_info=e)

2580

2581

with PGPEngine() as pgp:

2582

for client_name, client in clients_data.iteritems():

2583

# Skip removed clients

2584

if client_name not in client_settings:

2585

continue

2586

2587

# Decide which value to use after restoring saved state.

2588

# We have three different values: Old config file,

2589

# new config file, and saved state.

2590

# New config value takes precedence if it differs from old

2591

# config value, otherwise use saved state.

2592

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

2593

try:

2594

# For each value in new config, check if it

2595

# differs from the old config value (Except for

2596

# the "secret" attribute)

2597

if (name != "secret" and

2598

value != old_client_settings[client_name]

2599

[name]):

2600

client[name] = value

2601

except KeyError:

2602

pass

2603

2604

# Clients who has passed its expire date can still be

2605

# enabled if its last checker was successful. Clients

2606

# whose checker succeeded before we stored its state is

2607

# assumed to have successfully run all checkers during

2608

# downtime.

2609

if client["enabled"]:

2610

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

2611

if not client["last_checked_ok"]:

2612

logger.warning(

2613

"disabling client {0} - Client never "

2614

"performed a successful checker"

2615

.format(client_name))

2616

client["enabled"] = False

2617

elif client["last_checker_status"] != 0:

2618

logger.warning(

2619

"disabling client {0} - Client "

2620

"last checker failed with error code {1}"

2621

.format(client_name,

2622

client["last_checker_status"]))

2623

client["enabled"] = False

2624

else:

2625

client["expires"] = (datetime.datetime

2626

.utcnow()

2627

+ client["timeout"])

2628

logger.debug("Last checker succeeded,"

2629

" keeping {0} enabled"

2630

.format(client_name))

1960

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

1961

def client_config_items(config, section):

1962

special_settings = {

1963

"approved_by_default":

1964

lambda: config.getboolean(section,

1965

"approved_by_default"),

1966

}

1967

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

2631

1968

try:

2632

client["secret"] = (

2633

pgp.decrypt(client["encrypted_secret"],

2634

client_settings[client_name]

2635

["secret"]))

2636

except PGPError:

2637

# If decryption fails, we use secret from new settings

2638

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

2639

.format(client_name))

2640

client["secret"] = (

2641

client_settings[client_name]["secret"])

2642

2643

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

2644

for client_name in (set(old_client_settings)

2645

- set(client_settings)):

2646

del clients_data[client_name]

2647

for client_name in (set(client_settings)

2648

- set(old_client_settings)):

2649

clients_data[client_name] = client_settings[client_name]

2650

2651

# Create all client objects

2652

for client_name, client in clients_data.iteritems():

2653

tcp_server.clients[client_name] = client_class(

2654

name = client_name, settings = client,

2655

server_settings = server_settings)

2656

1969

yield (name, special_settings[name]())

1970

except KeyError:

1971

yield (name, value)

1972

1973

tcp_server.clients.update(set(

1974

client_class(name = section,

1975

config= dict(client_config_items(

1976

client_config, section)))

1977

for section in client_config.sections()))

2657

1978

if not tcp_server.clients:

2658

1979

logger.warning("No clients defined")

2659

2660

if not foreground:

2661

if pidfile is not None:

2662

try:

2663

with pidfile:

2664

pid = os.getpid()

2665

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

2666

except IOError:

2667

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

2668

pidfilename, pid)

2669

del pidfile

1980

1981

if not debug:

1982

try:

1983

with pidfile:

1984

pid = os.getpid()

1985

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

1986

del pidfile

1987

except IOError:

1988

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

1989

pidfilename, pid)

1990

except NameError:

1991

# "pidfile" was never created

1992

pass

2670

1993

del pidfilename

1994

1995

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

2671

1996

2672

1997

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

2673

1998

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

2674

1999

2675

2000

if use_dbus:

2676

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

2677

"se.bsnet.fukt.Mandos"})

2678

class MandosDBusService(DBusObjectWithProperties):

2001

class MandosDBusService(dbus.service.Object):

2679

2002

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

2680

2003

def __init__(self):

2681

2004

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

2682

_interface = "se.recompile.Mandos"

2683

2684

@dbus_interface_annotations(_interface)

2685

def _foo(self):

2686

return { "org.freedesktop.DBus.Property"

2687

".EmitsChangedSignal":

2688

"false"}

2005

_interface = "se.bsnet.fukt.Mandos"

2689

2006

2690

2007

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

2691

2008

def ClientAdded(self, objpath):

2706

2023

def GetAllClients(self):

2707

2024

"D-Bus method"

2708

2025

return dbus.Array(c.dbus_object_path

2709

for c in

2710

tcp_server.clients.itervalues())

2026

for c in tcp_server.clients)

2711

2027

2712

2028

@dbus.service.method(_interface,

2713

2029

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

2715

2031

"D-Bus method"

2716

2032

return dbus.Dictionary(

2717

2033

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

2718

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

2034

for c in tcp_server.clients),

2719

2035

signature="oa{sv}")

2720

2036

2721

2037

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

2722

2038

def RemoveClient(self, object_path):

2723

2039

"D-Bus method"

2724

for c in tcp_server.clients.itervalues():

2040

for c in tcp_server.clients:

2725

2041

if c.dbus_object_path == object_path:

2726

del tcp_server.clients[c.name]

2042

tcp_server.clients.remove(c)

2727

2043

c.remove_from_connection()

2728

2044

# Don't signal anything except ClientRemoved

2729

2045

c.disable(quiet=True)

2734

2050

2735

2051

del _interface

2736

2052

2737

mandos_dbus_service = MandosDBusService()

2053

class MandosDBusServiceTransitional(MandosDBusService):

2054

__metaclass__ = transitional_dbus_metaclass

2055

mandos_dbus_service = MandosDBusServiceTransitional()

2738

2056

2739

2057

def cleanup():

2740

2058

"Cleanup function; run on exit"

2741

2059

service.cleanup()

2742

2060

2743

multiprocessing.active_children()

2744

wnull.close()

2745

if not (tcp_server.clients or client_settings):

2746

return

2747

2748

# Store client before exiting. Secrets are encrypted with key

2749

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

2750

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

2751

clients = {}

2752

with PGPEngine() as pgp:

2753

for client in tcp_server.clients.itervalues():

2754

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

2755

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

2756

key)

2757

client_dict = {}

2758

2759

# A list of attributes that can not be pickled

2760

# + secret.

2761

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

2762

"checker", "server_settings"))

2763

for name, typ in (inspect.getmembers

2764

(dbus.service.Object)):

2765

exclude.add(name)

2766

2767

client_dict["encrypted_secret"] = (client

2768

.encrypted_secret)

2769

for attr in client.client_structure:

2770

if attr not in exclude:

2771

client_dict[attr] = getattr(client, attr)

2772

2773

clients[client.name] = client_dict

2774

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

2775

2776

try:

2777

with (tempfile.NamedTemporaryFile

2778

(mode='wb', suffix=".pickle", prefix='clients-',

2779

dir=os.path.dirname(stored_state_path),

2780

delete=False)) as stored_state:

2781

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

2782

tempname=stored_state.name

2783

os.rename(tempname, stored_state_path)

2784

except (IOError, OSError) as e:

2785

if not debug:

2786

try:

2787

os.remove(tempname)

2788

except NameError:

2789

pass

2790

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

2791

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

2792

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

2793

else:

2794

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

2795

exc_info=e)

2796

raise

2797

2798

# Delete all clients, and settings from config

2799

2061

while tcp_server.clients:

2800

name, client = tcp_server.clients.popitem()

2062

client = tcp_server.clients.pop()

2801

2063

if use_dbus:

2802

2064

client.remove_from_connection()

2065

client.disable_hook = None

2803

2066

# Don't signal anything except ClientRemoved

2804

2067

client.disable(quiet=True)

2805

2068

if use_dbus:

2806

2069

# Emit D-Bus signal

2807

mandos_dbus_service.ClientRemoved(client

2808

.dbus_object_path,

2070

mandos_dbus_service.ClientRemoved(client.dbus_object_path,

2809

2071

client.name)

2810

client_settings.clear()

2811

2072

2812

2073

atexit.register(cleanup)

2813

2074

2814

for client in tcp_server.clients.itervalues():

2075

for client in tcp_server.clients:

2815

2076

if use_dbus:

2816

2077

# Emit D-Bus signal

2817

2078

mandos_dbus_service.ClientAdded(client.dbus_object_path)

2818

# Need to initiate checking of clients

2819

if client.enabled:

2820

client.init_checker()

2079

client.enable()

2821

2080

2822

2081

tcp_server.enable()

2823

2082

tcp_server.server_activate()

2826

2085

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

2827

2086

if use_ipv6:

2828

2087

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

2829

" flowinfo %d, scope_id %d",

2830

*tcp_server.socket.getsockname())

2088

" flowinfo %d, scope_id %d"

2089

% tcp_server.socket.getsockname())

2831

2090

else: # IPv4

2832

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

2833

*tcp_server.socket.getsockname())

2091

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

2092

% tcp_server.socket.getsockname())

2834

2093

2835

2094

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

2836

2095

2839

2098

try:

2840

2099

service.activate()

2841

2100

except dbus.exceptions.DBusException as error:

2842

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

2101

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

2843

2102

cleanup()

2844

2103

sys.exit(1)

2845

2104

# End of Avahi example code

2852

2111

logger.debug("Starting main loop")

2853

2112

main_loop.run()

2854

2113

except AvahiError as error:

2855

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

2114

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

2856

2115

cleanup()

2857

2116

sys.exit(1)

2858

2117

except KeyboardInterrupt:

2863

2122

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

2864

2123

cleanup()

2865

2124

2125

2866

2126

if __name__ == '__main__':

2867

2127

main()