/mandos/release : revision 237.7.195

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

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#

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# Everything else is

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#

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

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

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# along with this program. If not, see

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

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#

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

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

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#

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from __future__ import (division, 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 = "1.3.1"

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#logger = logging.getLogger('mandos')

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logger = logging.Logger('mandos')

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

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

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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.GetAlternativeServiceName(self.name))

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self.name = unicode(self.server

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.GetAlternativeServiceName(self.name))

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

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self.name)

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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("DBusException: %s", error)

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logger.critical("D-Bus Exception", exc_info=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: %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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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) as e:

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dbus.exceptions.DBusException):

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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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def _timedelta_to_milliseconds(td):

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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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"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_enabled: datetime.datetime(); (UTC)

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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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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 password has been sent

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extended_timeout: extra long timeout when secret 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", "fingerprint",

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

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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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"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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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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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.

490

"""

491

settings = {}

492

for client_name in config.sections():

493

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

498

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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531

self.name = name

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if config is None:

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config = {}

532

if server_settings is None:

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server_settings = {}

534

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:

540

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"):

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

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+ self.timeout)

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else:

546

self.last_enabled = None

547

self.expires = None

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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

344

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

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.replace(" ", ""))

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

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if "secret" in config:

348

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

349

elif "secfile" in config:

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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"

356

% 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

554

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

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datetime.datetime.utcnow())

556

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# attributes specific for this server instance

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self.checker = None

368

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self.checker_initiator_tag = None

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self.disable_initiator_tag = None

370

self.expires = None

371

561

self.checker_callback_tag = None

372

self.checker_command = config["checker"]

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562

self.current_checker_command = None

374

self.last_connect = None

375

self._approved = None

376

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

377

True)

563

self.approved = None

378

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self.approvals_pending = 0

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"])

383

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

565

self.changedstate = (multiprocessing_manager

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.Condition(multiprocessing_manager

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.Lock()))

568

self.client_structure = [attr for attr in

569

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)

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# Send notice to process children that client state has changed

385

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def send_changedstate(self):

386

self.changedstate.acquire()

387

self.changedstate.notify_all()

388

self.changedstate.release()

389

582

with self.changedstate:

583

self.changedstate.notify_all()

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def enable(self):

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

392

587

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

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# Already enabled

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589

return

590

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

591

self.enabled = True

592

self.last_enabled = datetime.datetime.utcnow()

593

self.init_checker()

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self.send_changedstate()

595

596

def disable(self, quiet=True):

597

"""Disable this client."""

598

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

599

return False

600

if not quiet:

601

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

602

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

603

gobject.source_remove(self.disable_initiator_tag)

604

self.disable_initiator_tag = None

605

self.expires = None

606

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

607

gobject.source_remove(self.checker_initiator_tag)

608

self.checker_initiator_tag = None

609

self.stop_checker()

610

self.enabled = False

611

if not quiet:

612

self.send_changedstate()

613

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

614

return False

615

616

def __del__(self):

617

self.disable()

618

619

def init_checker(self):

396

620

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

397

621

# and every interval from then on.

622

if self.checker_initiator_tag is not None:

623

gobject.source_remove(self.checker_initiator_tag)

398

624

self.checker_initiator_tag = (gobject.timeout_add

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(self.interval_milliseconds(),

400

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self.start_checker))

401

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

402

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

628

if self.disable_initiator_tag is not None:

629

gobject.source_remove(self.disable_initiator_tag)

403

630

self.disable_initiator_tag = (gobject.timeout_add

404

631

(self.timeout_milliseconds(),

405

632

self.disable))

406

self.enabled = True

407

self.last_enabled = datetime.datetime.utcnow()

408

633

# Also start a new checker *right now*.

409

634

self.start_checker()

410

635

411

def disable(self, quiet=True):

412

"""Disable this client."""

413

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

414

return False

415

if not quiet:

416

self.send_changedstate()

417

if not quiet:

418

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

419

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

420

gobject.source_remove(self.disable_initiator_tag)

421

self.disable_initiator_tag = None

422

self.expires = None

423

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

424

gobject.source_remove(self.checker_initiator_tag)

425

self.checker_initiator_tag = None

426

self.stop_checker()

427

if self.disable_hook:

428

self.disable_hook(self)

429

self.enabled = False

430

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

431

return False

432

433

def __del__(self):

434

self.disable_hook = None

435

self.disable()

436

437

636

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

438

637

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

439

638

self.checker_callback_tag = None

440

639

self.checker = None

441

640

if os.WIFEXITED(condition):

442

exitstatus = os.WEXITSTATUS(condition)

443

if exitstatus == 0:

641

self.last_checker_status = os.WEXITSTATUS(condition)

642

if self.last_checker_status == 0:

444

643

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

445

644

vars(self))

446

645

self.checked_ok()

448

647

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

449

648

vars(self))

450

649

else:

650

self.last_checker_status = -1

451

651

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

452

652

vars(self))

453

653

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

"""

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."""

460

662

if timeout is None:

461

663

timeout = self.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))

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

468

672

469

673

def need_approval(self):

470

674

self.last_approval_request = datetime.datetime.utcnow()

475

679

If a checker already exists, leave it running and do

476

680

nothing."""

477

681

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

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

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

482

686

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

483

687

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

484

688

# should be.

486

690

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

487

691

try:

488

692

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

489

except (AttributeError, OSError) as error:

490

if (isinstance(error, OSError)

491

and error.errno != errno.ECHILD):

492

raise error

693

except AttributeError:

694

pass

695

except OSError as error:

696

if error.errno != errno.ECHILD:

697

raise

493

698

else:

494

699

if pid:

495

700

logger.warning("Checker was a zombie")

498

703

self.current_checker_command)

499

704

# Start a new checker if needed

500

705

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)

501

711

try:

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

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

520

717

self.current_checker_command = command

521

718

try:

522

719

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

525

722

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

526

723

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

527

724

# 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 })

528

733

self.checker = subprocess.Popen(command,

529

734

close_fds=True,

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.

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:

537

748

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)

541

749

except OSError as error:

542

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

543

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)

544

759

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

545

760

return True

546

761

553

768

return

554

769

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

555

770

try:

556

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

771

self.checker.terminate()

557

772

#time.sleep(0.5)

558

773

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

559

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

774

# self.checker.kill()

560

775

except OSError as error:

561

776

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

562

777

raise

579

794

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

580

795

if byte_arrays and signature != "ay":

581

796

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

582

" signature %r" % signature)

797

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

583

798

def decorator(func):

584

799

func._dbus_is_property = True

585

800

func._dbus_interface = dbus_interface

593

808

return decorator

594

809

595

810

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

596

848

class DBusPropertyException(dbus.exceptions.DBusException):

597

849

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

598

850

"""

621

873

"""

622

874

623

875

@staticmethod

624

def _is_dbus_property(obj):

625

return getattr(obj, "_dbus_is_property", False)

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)

626

884

627

def _get_all_dbus_properties(self):

885

def _get_all_dbus_things(self, thing):

628

886

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

629

887

"""

630

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

888

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

889

name),

890

athing.__get__(self))

631

891

for cls in self.__class__.__mro__

632

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

892

for name, athing in

893

inspect.getmembers(cls,

894

self._is_dbus_thing(thing)))

633

895

634

896

def _get_dbus_property(self, interface_name, property_name):

635

897

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

636

898

property with the specified name and interface.

637

899

"""

638

900

for cls in self.__class__.__mro__:

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:

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):

641

906

return value.__get__(self)

642

907

643

908

# No such property

644

909

raise DBusPropertyNotFound(self.dbus_object_path + ":"

645

910

+ interface_name + "."

646

911

+ property_name)

647

648

912

649

913

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

650

914

out_signature="v")

671

935

# signatures other than "ay".

672

936

if prop._dbus_signature != "ay":

673

937

raise ValueError

674

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

675

for byte in value))

938

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

939

for byte in value))

676

940

prop(value)

677

941

678

942

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

683

947

684

948

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

685

949

"""

686

all = {}

687

for name, prop in self._get_all_dbus_properties():

950

properties = {}

951

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

688

952

if (interface_name

689

953

and interface_name != prop._dbus_interface):

690

954

# Interface non-empty but did not match

694

958

continue

695

959

value = prop()

696

960

if not hasattr(value, "variant_level"):

697

all[name] = value

961

properties[name] = value

698

962

continue

699

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

700

value.variant_level+1)

701

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

963

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

964

value.variant_level+1)

965

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

702

966

703

967

@dbus.service.method(dbus.INTROSPECTABLE_IFACE,

704

968

out_signature="s",

705

969

path_keyword='object_path',

706

970

connection_keyword='connection')

707

971

def Introspect(self, object_path, connection):

708

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

972

"""Overloading of standard D-Bus method.

973

974

Inserts property tags and interface annotation tags.

709

975

"""

710

976

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

711

977

connection)

718

984

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

719

985

return e

720

986

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

987

# Add property tags

721

988

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

722

989

for name, prop

723

in self._get_all_dbus_properties()

990

in self._get_all_dbus_things("property")

724

991

if prop._dbus_interface

725

992

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

726

993

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)

727

1025

# Add the names to the return values for the

728

1026

# "org.freedesktop.DBus.Properties" methods

729

1027

if (if_tag.getAttribute("name")

744

1042

except (AttributeError, xml.dom.DOMException,

745

1043

xml.parsers.expat.ExpatError) as error:

746

1044

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

747

error)

1045

exc_info=error)

748

1046

return xmlstring

749

1047

750

1048

751

def datetime_to_dbus (dt, variant_level=0):

1049

def datetime_to_dbus(dt, variant_level=0):

752

1050

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

753

1051

if dt is None:

754

1052

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

755

1053

return dbus.String(dt.isoformat(),

756

1054

variant_level=variant_level)

757

1055

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

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"})

814

1228

class ClientDBus(Client, DBusObjectWithProperties):

815

1229

"""A Client class using D-Bus

816

1230

825

1239

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

826

1240

827

1241

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

828

self._approvals_pending = 0

829

1242

self.bus = bus

830

1243

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

831

1244

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

837

1250

("/clients/" + client_object_name))

838

1251

DBusObjectWithProperties.__init__(self, self.bus,

839

1252

self.dbus_object_path)

840

1253

841

1254

def notifychangeproperty(transform_func,

842

1255

dbus_name, type_func=lambda x: x,

843

1256

variant_level=1):

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

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

849

1263

type_func: Function that transform the value before sending it

850

to DBus

851

variant_level: DBus variant level. default: 1

1264

to the D-Bus. Default: no transform

1265

variant_level: D-Bus variant level. Default: 1

852

1266

"""

853

real_value = [None,]

1267

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

854

1268

def setter(self, value):

855

old_value = real_value[0]

856

real_value[0] = value

857

1269

if hasattr(self, "dbus_object_path"):

858

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

859

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

860

variant_level)

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)

861

1276

self.PropertyChanged(dbus.String(dbus_name),

862

1277

dbus_value)

1278

setattr(self, attrname, value)

863

1279

864

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

865

1280

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

866

1281

867

1282

expires = notifychangeproperty(datetime_to_dbus, "Expires")

868

1283

approvals_pending = notifychangeproperty(dbus.Boolean,

872

1287

last_enabled = notifychangeproperty(datetime_to_dbus,

873

1288

"LastEnabled")

874

1289

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

875

type_func = lambda checker: checker is not None)

1290

type_func = lambda checker:

1291

checker is not None)

876

1292

last_checked_ok = notifychangeproperty(datetime_to_dbus,

877

1293

"LastCheckedOK")

878

last_approval_request = notifychangeproperty(datetime_to_dbus,

879

"LastApprovalRequest")

1294

last_checker_status = notifychangeproperty(dbus.Int16,

1295

"LastCheckerStatus")

1296

last_approval_request = notifychangeproperty(

1297

datetime_to_dbus, "LastApprovalRequest")

880

1298

approved_by_default = notifychangeproperty(dbus.Boolean,

881

1299

"ApprovedByDefault")

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)

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)

886

1307

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

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)

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)

893

1318

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

894

1319

895

1320

del notifychangeproperty

937

1362

return r

938

1363

939

1364

def _reset_approved(self):

940

self._approved = None

1365

self.approved = None

941

1366

return False

942

1367

943

1368

def approve(self, value=True):

944

self.send_changedstate()

945

self._approved = value

946

gobject.timeout_add(_timedelta_to_milliseconds

1369

self.approved = value

1370

gobject.timeout_add(timedelta_to_milliseconds

947

1371

(self.approval_duration),

948

1372

self._reset_approved)

949

1373

self.send_changedstate()

950

1374

951

1375

## D-Bus methods, signals & properties

952

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

953

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

954

1385

## Signals

955

1386

956

1387

# CheckerCompleted - signal

1055

1486

access="readwrite")

1056

1487

def ApprovalDuration_dbus_property(self, value=None):

1057

1488

if value is None: # get

1058

return dbus.UInt64(_timedelta_to_milliseconds(

1489

return dbus.UInt64(timedelta_to_milliseconds(

1059

1490

self.approval_duration))

1060

1491

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

1061

1492

1075

1506

def Host_dbus_property(self, value=None):

1076

1507

if value is None: # get

1077

1508

return dbus.String(self.host)

1078

self.host = value

1509

self.host = unicode(value)

1079

1510

1080

1511

# Created - property

1081

1512

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

1082

1513

def Created_dbus_property(self):

1083

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

1514

return datetime_to_dbus(self.created)

1084

1515

1085

1516

# LastEnabled - property

1086

1517

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

1107

1538

return

1108

1539

return datetime_to_dbus(self.last_checked_ok)

1109

1540

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

1110

1547

# Expires - property

1111

1548

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

1112

1549

def Expires_dbus_property(self):

1123

1560

def Timeout_dbus_property(self, value=None):

1124

1561

if value is None: # get

1125

1562

return dbus.UInt64(self.timeout_milliseconds())

1563

old_timeout = self.timeout

1126

1564

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

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))

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))

1147

1581

1148

1582

# ExtendedTimeout - property

1149

1583

@dbus_service_property(_interface, signature="t",

1162

1596

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

1163

1597

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

1164

1598

return

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

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

1170

1605

1171

1606

# Checker - property

1172

1607

@dbus_service_property(_interface, signature="s",

1174

1609

def Checker_dbus_property(self, value=None):

1175

1610

if value is None: # get

1176

1611

return dbus.String(self.checker_command)

1177

self.checker_command = value

1612

self.checker_command = unicode(value)

1178

1613

1179

1614

# CheckerRunning - property

1180

1615

@dbus_service_property(_interface, signature="b",

1209

1644

raise KeyError()

1210

1645

1211

1646

def __getattribute__(self, name):

1212

if(name == '_pipe'):

1647

if name == '_pipe':

1213

1648

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

1214

1649

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

1215

1650

data = self._pipe.recv()

1222

1657

return func

1223

1658

1224

1659

def __setattr__(self, name, value):

1225

if(name == '_pipe'):

1660

if name == '_pipe':

1226

1661

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

1227

1662

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

1228

1663

1229

class ClientDBusTransitional(ClientDBus):

1230

__metaclass__ = transitional_dbus_metaclass

1231

1664

1232

1665

class ClientHandler(socketserver.BaseRequestHandler, object):

1233

1666

"""A class to handle client connections.

1270

1703

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

1271

1704

try:

1272

1705

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

1273

raise RuntimeError

1706

raise RuntimeError(line)

1274

1707

except (ValueError, IndexError, RuntimeError) as error:

1275

1708

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

1276

1709

return

1313

1746

client.name)

1314

1747

if self.server.use_dbus:

1315

1748

# Emit D-Bus signal

1316

client.Rejected("Disabled")

1749

client.Rejected("Disabled")

1317

1750

return

1318

1751

1319

if client._approved or not client.approval_delay:

1752

if client.approved or not client.approval_delay:

1320

1753

#We are approved or approval is disabled

1321

1754

break

1322

elif client._approved is None:

1755

elif client.approved is None:

1323

1756

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

1324

1757

client.name)

1325

1758

if self.server.use_dbus:

1336

1769

return

1337

1770

1338

1771

#wait until timeout or approved

1339

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

1340

1772

time = datetime.datetime.now()

1341

1773

client.changedstate.acquire()

1342

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

1774

client.changedstate.wait(

1775

float(timedelta_to_milliseconds(delay)

1776

/ 1000))

1343

1777

client.changedstate.release()

1344

1778

time2 = datetime.datetime.now()

1345

1779

if (time2 - time) >= delay:

1361

1795

try:

1362

1796

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

1363

1797

except gnutls.errors.GNUTLSError as error:

1364

logger.warning("gnutls send failed")

1798

logger.warning("gnutls send failed",

1799

exc_info=error)

1365

1800

return

1366

1801

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

1367

1802

sent, len(client.secret)

1369

1804

sent_size += sent

1370

1805

1371

1806

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

1372

# bump the timeout as if seen

1373

client.checked_ok(client.extended_timeout)

1807

# bump the timeout using extended_timeout

1808

client.bump_timeout(client.extended_timeout)

1374

1809

if self.server.use_dbus:

1375

1810

# Emit D-Bus signal

1376

1811

client.GotSecret()

1381

1816

try:

1382

1817

session.bye()

1383

1818

except gnutls.errors.GNUTLSError as error:

1384

logger.warning("GnuTLS bye failed")

1819

logger.warning("GnuTLS bye failed",

1820

exc_info=error)

1385

1821

1386

1822

@staticmethod

1387

1823

def peer_certificate(session):

1443

1879

# Convert the buffer to a Python bytestring

1444

1880

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

1445

1881

# Convert the bytestring to hexadecimal notation

1446

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

1882

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

1447

1883

return hex_fpr

1448

1884

1449

1885

1452

1888

def sub_process_main(self, request, address):

1453

1889

try:

1454

1890

self.finish_request(request, address)

1455

except:

1891

except Exception:

1456

1892

self.handle_error(request, address)

1457

1893

self.close_request(request)

1458

1894

1459

1895

def process_request(self, request, address):

1460

1896

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

1461

multiprocessing.Process(target = self.sub_process_main,

1462

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

1897

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

1898

args = (request, address))

1899

proc.start()

1900

return proc

1463

1901

1464

1902

1465

1903

class MultiprocessingMixInWithPipe(MultiprocessingMixIn, object):

1471

1909

"""

1472

1910

parent_pipe, self.child_pipe = multiprocessing.Pipe()

1473

1911

1474

super(MultiprocessingMixInWithPipe,

1475

self).process_request(request, client_address)

1912

proc = MultiprocessingMixIn.process_request(self, request,

1913

client_address)

1476

1914

self.child_pipe.close()

1477

self.add_pipe(parent_pipe)

1915

self.add_pipe(parent_pipe, proc)

1478

1916

1479

def add_pipe(self, parent_pipe):

1917

def add_pipe(self, parent_pipe, proc):

1480

1918

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

1481

raise NotImplementedError

1919

raise NotImplementedError()

1482

1920

1483

1921

1484

1922

class IPv6_TCPServer(MultiprocessingMixInWithPipe,

1491

1929

use_ipv6: Boolean; to use IPv6 or not

1492

1930

"""

1493

1931

def __init__(self, server_address, RequestHandlerClass,

1494

interface=None, use_ipv6=True):

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

"""

1495

1936

self.interface = interface

1496

1937

if use_ipv6:

1497

1938

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.

1498

1965

socketserver.TCPServer.__init__(self, server_address,

1499

1966

RequestHandlerClass)

1967

1500

1968

def server_bind(self):

1501

1969

"""This overrides the normal server_bind() function

1502

1970

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

1510

1978

try:

1511

1979

self.socket.setsockopt(socket.SOL_SOCKET,

1512

1980

SO_BINDTODEVICE,

1513

str(self.interface

1514

+ '\0'))

1981

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

1515

1982

except socket.error as error:

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:

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:

1521

1987

logger.error("SO_BINDTODEVICE not available;"

1522

1988

" cannot bind to interface %s",

1523

1989

self.interface)

1990

elif error.errno == errno.ENODEV:

1991

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

1992

" cannot bind", self.interface)

1524

1993

else:

1525

1994

raise

1526

1995

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

1529

1998

if self.address_family == socket.AF_INET6:

1530

1999

any_address = "::" # in6addr_any

1531

2000

else:

1532

any_address = socket.INADDR_ANY

2001

any_address = "0.0.0.0" # INADDR_ANY

1533

2002

self.server_address = (any_address,

1534

2003

self.server_address[1])

1535

2004

elif not self.server_address[1]:

1556

2025

"""

1557

2026

def __init__(self, server_address, RequestHandlerClass,

1558

2027

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

1559

gnutls_priority=None, use_dbus=True):

2028

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

1560

2029

self.enabled = False

1561

2030

self.clients = clients

1562

2031

if self.clients is None:

1563

self.clients = set()

2032

self.clients = {}

1564

2033

self.use_dbus = use_dbus

1565

2034

self.gnutls_priority = gnutls_priority

1566

2035

IPv6_TCPServer.__init__(self, server_address,

1567

2036

RequestHandlerClass,

1568

2037

interface = interface,

1569

use_ipv6 = use_ipv6)

2038

use_ipv6 = use_ipv6,

2039

socketfd = socketfd)

1570

2040

def server_activate(self):

1571

2041

if self.enabled:

1572

2042

return socketserver.TCPServer.server_activate(self)

2043

1573

2044

def enable(self):

1574

2045

self.enabled = True

1575

def add_pipe(self, parent_pipe):

2046

2047

def add_pipe(self, parent_pipe, proc):

1576

2048

# Call "handle_ipc" for both data and EOF events

1577

2049

gobject.io_add_watch(parent_pipe.fileno(),

1578

2050

gobject.IO_IN | gobject.IO_HUP,

1579

2051

functools.partial(self.handle_ipc,

1580

parent_pipe = parent_pipe))

1581

2052

parent_pipe =

2053

parent_pipe,

2054

proc = proc))

2055

1582

2056

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

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):

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()

1600

2062

return False

1601

2063

1602

2064

# Read a request from the child

1607

2069

fpr = request[1]

1608

2070

address = request[2]

1609

2071

1610

for c in self.clients:

2072

for c in self.clients.itervalues():

1611

2073

if c.fingerprint == fpr:

1612

2074

client = c

1613

2075

break

1616

2078

"dress: %s", fpr, address)

1617

2079

if self.use_dbus:

1618

2080

# Emit D-Bus signal

1619

mandos_dbus_service.ClientNotFound(fpr, address[0])

2081

mandos_dbus_service.ClientNotFound(fpr,

2082

address[0])

1620

2083

parent_pipe.send(False)

1621

2084

return False

1622

2085

1623

2086

gobject.io_add_watch(parent_pipe.fileno(),

1624

2087

gobject.IO_IN | gobject.IO_HUP,

1625

2088

functools.partial(self.handle_ipc,

1626

parent_pipe = parent_pipe,

1627

client_object = client))

2089

parent_pipe =

2090

parent_pipe,

2091

proc = proc,

2092

client_object =

2093

client))

1628

2094

parent_pipe.send(True)

1629

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

2095

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

2096

# same fileno

1630

2097

return False

1631

2098

if command == 'funcall':

1632

2099

funcname = request[1]

1633

2100

args = request[2]

1634

2101

kwargs = request[3]

1635

2102

1636

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

2103

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

2104

funcname)(*args,

2105

**kwargs)))

1637

2106

1638

2107

if command == 'getattr':

1639

2108

attrname = request[1]

1640

2109

if callable(client_object.__getattribute__(attrname)):

1641

2110

parent_pipe.send(('function',))

1642

2111

else:

1643

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

2112

parent_pipe.send(('data', client_object

2113

.__getattribute__(attrname)))

1644

2114

1645

2115

if command == 'setattr':

1646

2116

attrname = request[1]

1650

2120

return True

1651

2121

1652

2122

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

1653

2222

def string_to_delta(interval):

1654

2223

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

1655

2224

1666

2235

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

1667

2236

datetime.timedelta(0, 330)

1668

2237

"""

2238

2239

try:

2240

return rfc3339_duration_to_delta(interval)

2241

except ValueError:

2242

pass

2243

1669

2244

timevalue = datetime.timedelta(0)

1670

2245

for s in interval.split():

1671

2246

try:

1682

2257

elif suffix == "w":

1683

2258

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

1684

2259

else:

1685

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

1686

except (ValueError, IndexError) as e:

2260

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

2261

.format(suffix))

2262

except IndexError as e:

1687

2263

raise ValueError(*(e.args))

1688

2264

timevalue += delta

1689

2265

return timevalue

1690

2266

1691

2267

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

1716

2268

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

1717

2269

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

1718

2270

1726

2278

sys.exit()

1727

2279

if not noclose:

1728

2280

# Close all standard open file descriptors

1729

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

2281

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

1730

2282

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

1731

2283

raise OSError(errno.ENODEV,

1732

"%s not a character device"

1733

% os.path.devnull)

2284

"{0} not a character device"

2285

.format(os.devnull))

1734

2286

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

1735

2287

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

1736

2288

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

1745

2297

1746

2298

parser = argparse.ArgumentParser()

1747

2299

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

1748

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

2300

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

1749

2301

help="show version number and exit")

1750

2302

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

1751

2303

help="Bind to interface IF")

1757

2309

help="Run self-test")

1758

2310

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

1759

2311

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

1760

" to terminal")

2312

" to terminal", default=None)

1761

2313

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

1762

2314

help="Debug level for stdout output")

1763

2315

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

1770

2322

" files")

1771

2323

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

1772

2324

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

1773

" system bus interface")

2325

" system bus interface", default=None)

1774

2326

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

1775

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

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

1776

2340

options = parser.parse_args()

1777

2341

1778

2342

if options.check:

1786

2350

"port": "",

1787

2351

"debug": "False",

1788

2352

"priority":

1789

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

2353

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

1790

2354

"servicename": "Mandos",

1791

2355

"use_dbus": "True",

1792

2356

"use_ipv6": "True",

1793

2357

"debuglevel": "",

2358

"restore": "True",

2359

"socket": "",

2360

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

2361

"foreground": "False",

1794

2362

}

1795

2363

1796

2364

# Parse config file for server-global settings

1801

2369

# Convert the SafeConfigParser object to a dict

1802

2370

server_settings = server_config.defaults()

1803

2371

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

1804

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

2372

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

1805

2373

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

1806

2374

option)

1807

2375

if server_settings["port"]:

1808

2376

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

1809

2377

"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"])

1810

2387

del server_config

1811

2388

1812

2389

# Override the settings from the config file with command line

1813

2390

# options, if set.

1814

2391

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

1815

2392

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

1816

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

2393

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

2394

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

1817

2395

value = getattr(options, option)

1818

2396

if value is not None:

1819

2397

server_settings[option] = value

1822

2400

for option in server_settings.keys():

1823

2401

if type(server_settings[option]) is str:

1824

2402

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

1825

2410

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

1826

2411

1827

2412

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

1831

2416

debuglevel = server_settings["debuglevel"]

1832

2417

use_dbus = server_settings["use_dbus"]

1833

2418

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)

1834

2431

1835

2432

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

1836

2433

syslogger.setFormatter(logging.Formatter

1837

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

1838

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

1839

% server_settings["servicename"]))

2434

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

2435

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

2436

.format(server_settings

2437

["servicename"])))

1840

2438

1841

2439

# Parse config file with clients

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)

2440

client_config = configparser.SafeConfigParser(Client

2441

.client_defaults)

1851

2442

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

1852

2443

"clients.conf"))

1853

2444

1862

2453

use_ipv6=use_ipv6,

1863

2454

gnutls_priority=

1864

2455

server_settings["priority"],

1865

use_dbus=use_dbus)

1866

if not debug:

1867

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

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

1868

2464

try:

1869

2465

pidfile = open(pidfilename, "w")

1870

except IOError:

1871

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

2466

except IOError as e:

2467

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

2468

exc_info=e)

1872

2469

1873

try:

1874

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

1875

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

1876

except KeyError:

2470

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

1877

2471

try:

1878

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

1879

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

2472

uid = pwd.getpwnam(name).pw_uid

2473

gid = pwd.getpwnam(name).pw_gid

2474

break

1880

2475

except KeyError:

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

2476

continue

2477

else:

2478

uid = 65534

2479

gid = 65534

1887

2480

try:

1888

2481

os.setgid(gid)

1889

2482

os.setuid(uid)

1890

2483

except OSError as error:

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)

2484

if error.errno != errno.EPERM:

2485

raise

1901

2486

1902

2487

if debug:

1903

2488

# Enable all possible GnuTLS debugging

1914

2499

.gnutls_global_set_log_function(debug_gnutls))

1915

2500

1916

2501

# Redirect stdin so all checkers get /dev/null

1917

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

2502

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

1918

2503

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

1919

2504

if null > 2:

1920

2505

os.close(null)

1921

else:

1922

# No console logging

1923

logger.removeHandler(console)

1924

2506

1925

2507

# Need to fork before connecting to D-Bus

1926

if not debug:

2508

if not foreground:

1927

2509

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

1928

2510

daemon()

1929

2511

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

1930

2516

global main_loop

1931

2517

# From the Avahi example code

1932

DBusGMainLoop(set_as_default=True )

2518

DBusGMainLoop(set_as_default=True)

1933

2519

main_loop = gobject.MainLoop()

1934

2520

bus = dbus.SystemBus()

1935

2521

# End of Avahi example code

1936

2522

if use_dbus:

1937

2523

try:

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)

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))

1942

2529

except dbus.exceptions.NameExistsException as e:

1943

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

2530

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

1944

2531

use_dbus = False

1945

2532

server_settings["use_dbus"] = False

1946

2533

tcp_server.use_dbus = False

1947

2534

protocol = avahi.PROTO_INET6 if use_ipv6 else avahi.PROTO_INET

1948

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

1949

servicetype = "_mandos._tcp",

1950

protocol = protocol, bus = bus)

2535

service = AvahiServiceToSyslog(name =

2536

server_settings["servicename"],

2537

servicetype = "_mandos._tcp",

2538

protocol = protocol, bus = bus)

1951

2539

if server_settings["interface"]:

1952

2540

service.interface = (if_nametoindex

1953

2541

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

1957

2545

1958

2546

client_class = Client

1959

2547

if use_dbus:

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):

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))

1968

2631

try:

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()))

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

1978

2657

if not tcp_server.clients:

1979

2658

logger.warning("No clients defined")

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

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

1993

2670

del pidfilename

1994

1995

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

1996

2671

1997

2672

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

1998

2673

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

1999

2674

2000

2675

if use_dbus:

2001

class MandosDBusService(dbus.service.Object):

2676

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

2677

"se.bsnet.fukt.Mandos"})

2678

class MandosDBusService(DBusObjectWithProperties):

2002

2679

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

2003

2680

def __init__(self):

2004

2681

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

2005

_interface = "se.bsnet.fukt.Mandos"

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"}

2006

2689

2007

2690

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

2008

2691

def ClientAdded(self, objpath):

2023

2706

def GetAllClients(self):

2024

2707

"D-Bus method"

2025

2708

return dbus.Array(c.dbus_object_path

2026

for c in tcp_server.clients)

2709

for c in

2710

tcp_server.clients.itervalues())

2027

2711

2028

2712

@dbus.service.method(_interface,

2029

2713

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

2031

2715

"D-Bus method"

2032

2716

return dbus.Dictionary(

2033

2717

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

2034

for c in tcp_server.clients),

2718

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

2035

2719

signature="oa{sv}")

2036

2720

2037

2721

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

2038

2722

def RemoveClient(self, object_path):

2039

2723

"D-Bus method"

2040

for c in tcp_server.clients:

2724

for c in tcp_server.clients.itervalues():

2041

2725

if c.dbus_object_path == object_path:

2042

tcp_server.clients.remove(c)

2726

del tcp_server.clients[c.name]

2043

2727

c.remove_from_connection()

2044

2728

# Don't signal anything except ClientRemoved

2045

2729

c.disable(quiet=True)

2050

2734

2051

2735

del _interface

2052

2736

2053

class MandosDBusServiceTransitional(MandosDBusService):

2054

__metaclass__ = transitional_dbus_metaclass

2055

mandos_dbus_service = MandosDBusServiceTransitional()

2737

mandos_dbus_service = MandosDBusService()

2056

2738

2057

2739

def cleanup():

2058

2740

"Cleanup function; run on exit"

2059

2741

service.cleanup()

2060

2742

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

2061

2799

while tcp_server.clients:

2062

client = tcp_server.clients.pop()

2800

name, client = tcp_server.clients.popitem()

2063

2801

if use_dbus:

2064

2802

client.remove_from_connection()

2065

client.disable_hook = None

2066

2803

# Don't signal anything except ClientRemoved

2067

2804

client.disable(quiet=True)

2068

2805

if use_dbus:

2069

2806

# Emit D-Bus signal

2070

mandos_dbus_service.ClientRemoved(client.dbus_object_path,

2807

mandos_dbus_service.ClientRemoved(client

2808

.dbus_object_path,

2071

2809

client.name)

2810

client_settings.clear()

2072

2811

2073

2812

atexit.register(cleanup)

2074

2813

2075

for client in tcp_server.clients:

2814

for client in tcp_server.clients.itervalues():

2076

2815

if use_dbus:

2077

2816

# Emit D-Bus signal

2078

2817

mandos_dbus_service.ClientAdded(client.dbus_object_path)

2079

client.enable()

2818

# Need to initiate checking of clients

2819

if client.enabled:

2820

client.init_checker()

2080

2821

2081

2822

tcp_server.enable()

2082

2823

tcp_server.server_activate()

2085

2826

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

2086

2827

if use_ipv6:

2087

2828

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

2088

" flowinfo %d, scope_id %d"

2089

% tcp_server.socket.getsockname())

2829

" flowinfo %d, scope_id %d",

2830

*tcp_server.socket.getsockname())

2090

2831

else: # IPv4

2091

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

2092

% tcp_server.socket.getsockname())

2832

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

2833

*tcp_server.socket.getsockname())

2093

2834

2094

2835

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

2095

2836

2098

2839

try:

2099

2840

service.activate()

2100

2841

except dbus.exceptions.DBusException as error:

2101

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

2842

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

2102

2843

cleanup()

2103

2844

sys.exit(1)

2104

2845

# End of Avahi example code

2111

2852

logger.debug("Starting main loop")

2112

2853

main_loop.run()

2113

2854

except AvahiError as error:

2114

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

2855

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

2115

2856

cleanup()

2116

2857

sys.exit(1)

2117

2858

except KeyboardInterrupt:

2122

2863

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

2123

2864

cleanup()

2124

2865

2125

2126

2866

if __name__ == '__main__':

2127

2867

main()