/mandos/trunk : revision 535.1.4

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#!/usr/bin/python2.7

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#!/usr/bin/python

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# -*- mode: python; coding: utf-8 -*-

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#

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# Mandos server - give out binary blobs to connecting clients.

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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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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 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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import ctypes.util

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import xml.dom.minidom

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import inspect

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import GnuPGInterface

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try:

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SO_BINDTODEVICE = socket.SO_BINDTODEVICE

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except ImportError:

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SO_BINDTODEVICE = None

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if sys.version_info.major == 2:

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str = unicode

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version = "1.6.9"

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version = "1.4.1"

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stored_state_file = "clients.pickle"

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logger = logging.getLogger()

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syslogger = None

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syslogger = (logging.handlers.SysLogHandler

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(facility = logging.handlers.SysLogHandler.LOG_DAEMON,

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

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try:

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if_nametoindex = ctypes.cdll.LoadLibrary(

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

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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(b"16s16x", interface))

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interface_index = struct.unpack("I", ifreq[16:20])[0]

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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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global syslogger

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syslogger = (logging.handlers.SysLogHandler(

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facility = logging.handlers.SysLogHandler.LOG_DAEMON,

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address = "/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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class PGPEngine(object):

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

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def __init__(self):

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self.gnupg = GnuPGInterface.GnuPG()

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

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self.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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self.gnupg = GnuPGInterface.GnuPG()

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self.gnupg.options.meta_interactive = False

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self.gnupg.options.homedir = self.tempdir

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

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'--quiet'])

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def __enter__(self):

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return self

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

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

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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(

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

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with open(os.devnull) as devnull:

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try:

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

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

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attach_fhs={'stderr': devnull})

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

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f.write(data)

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

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ciphertext = f.read()

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proc.wait()

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except IOError as e:

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raise PGPError(e)

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self.gnupg.passphrase = None

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return ciphertext

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def decrypt(self, data, password):

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passphrase = self.password_encode(password)

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with tempfile.NamedTemporaryFile(

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dir = self.tempdir) 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 = data)

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if proc.returncode != 0:

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raise PGPError(err)

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

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with open(os.devnull) as devnull:

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try:

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

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

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attach_fhs={'stderr': devnull})

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

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f.write(data)

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

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decrypted_plaintext = f.read()

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proc.wait()

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except IOError as e:

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raise PGPError(e)

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self.gnupg.passphrase = None

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return decrypted_plaintext

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class AvahiError(Exception):

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

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self.value = value

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return super(AvahiError, self).__init__(value, *args,

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**kwargs)

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super(AvahiError, self).__init__(value, *args, **kwargs)

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def __unicode__(self):

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return unicode(repr(self.value))

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class AvahiServiceError(AvahiError):

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pass

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class AvahiGroupError(AvahiError):

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pass

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Used to optionally bind to the specified interface.

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name: string; Example: 'Mandos'

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

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

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

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port: integer; what port to announce

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TXT: list of strings; TXT record for the service

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

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server: D-Bus Server

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bus: dbus.SystemBus()

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"""

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def __init__(self,

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interface = avahi.IF_UNSPEC,

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name = None,

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servicetype = None,

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port = None,

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TXT = None,

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domain = "",

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host = "",

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max_renames = 32768,

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protocol = avahi.PROTO_UNSPEC,

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bus = None):

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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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protocol = avahi.PROTO_UNSPEC, bus = None):

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self.interface = interface

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self.name = name

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self.type = servicetype

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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, remove=True):

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def rename(self):

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

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if self.rename_count >= self.max_renames:

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logger.critical("No suitable Zeroconf service name found"

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" after %i retries, exiting.",

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self.rename_count)

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raise AvahiServiceError("Too many renames")

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self.name = str(

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self.server.GetAlternativeServiceName(self.name))

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self.rename_count += 1

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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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if remove:

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self.remove()

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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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if (error.get_dbus_name()

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== "org.freedesktop.Avahi.CollisionError"):

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

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return self.rename(remove=False)

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else:

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

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self.cleanup()

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os._exit(1)

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self.rename_count += 1

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def remove(self):

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

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if self.entry_group_state_changed_match is not None:

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self.entry_group_state_changed_match = None

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if self.group is not None:

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self.group.Reset()

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def add(self):

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

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self.remove()

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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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self.rename()

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elif state == avahi.ENTRY_GROUP_FAILURE:

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

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str(error))

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raise AvahiGroupError("State changed: {!s}".format(error))

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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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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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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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bad_states = {

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avahi.SERVER_INVALID: "Zeroconf server invalid",

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avahi.SERVER_REGISTERING: None,

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avahi.SERVER_COLLISION: "Zeroconf server name collision",

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avahi.SERVER_FAILURE: "Zeroconf server failure",

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}

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bad_states = { avahi.SERVER_INVALID:

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"Zeroconf server invalid",

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avahi.SERVER_REGISTERING: None,

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avahi.SERVER_COLLISION:

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"Zeroconf server name collision",

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avahi.SERVER_FAILURE:

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"Zeroconf server failure" }

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if state in bad_states:

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if bad_states[state] is not None:

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if error is None:

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logger.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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follow_name_owner_changes=True),

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avahi.DBUS_INTERFACE_SERVER)

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self.server.connect_to_signal("StateChanged",

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self.server_state_changed)

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self.server_state_changed)

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

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404

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class AvahiServiceToSyslog(AvahiService):

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

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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, *args, **kwargs)

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syslogger.setFormatter(logging.Formatter(

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

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.format(self.name)))

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ret = AvahiService.rename(self)

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syslogger.setFormatter(logging.Formatter

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

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

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% self.name))

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return ret

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def timedelta_to_milliseconds(td):

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"Convert a datetime.timedelta() to milliseconds"

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

384

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

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last_checker_status: integer between 0 and 255 reflecting exit

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status of last checker. -1 reflects crashed

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checker, -2 means no checker completed yet.

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checker, or None.

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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 secret has been sent

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extended_timeout: extra long timeout when password has been sent

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runtime_expansions: Allowed attributes for runtime expansion.

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

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disabled, or None

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server_settings: The server_settings dict from main()

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"""

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runtime_expansions = ("approval_delay", "approval_duration",

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

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

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"last_approval_request", "last_checked_ok",

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

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

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

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client_defaults = {

465

"timeout": "PT5M",

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"extended_timeout": "PT15M",

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"interval": "PT2M",

468

"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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}

475

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

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"extended_timeout": "15m",

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"interval": "2m",

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

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"host": "",

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"approval_delay": "0s",

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"approval_duration": "1s",

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"approved_by_default": "True",

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"enabled": "True",

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}

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def timeout_milliseconds(self):

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"Return the 'timeout' attribute in milliseconds"

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return timedelta_to_milliseconds(self.timeout)

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def extended_timeout_milliseconds(self):

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"Return the 'extended_timeout' attribute in milliseconds"

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return timedelta_to_milliseconds(self.extended_timeout)

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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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def approval_delay_milliseconds(self):

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return timedelta_to_milliseconds(self.approval_delay)

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@staticmethod

477

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

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

480

with exceptions for any special settings as defined above.

481

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

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value given the same arguments.

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"""

464

with exceptions for any special settings as defined above"""

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settings = {}

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for client_name in config.sections():

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section = dict(config.items(client_name))

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# Reformat values from string types to Python types

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client["approved_by_default"] = config.getboolean(

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client_name, "approved_by_default")

493

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

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"enabled")

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

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# Uppercase and remove spaces from fingerprint for later

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# comparison purposes with return value from the

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# fingerprint() function

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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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"rb") as secfile:

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

508

485

else:

509

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

510

.format(section))

486

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

487

% section)

511

488

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

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client["extended_timeout"] = string_to_delta(

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490

section["extended_timeout"])

519

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

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client["last_approval_request"] = None

521

498

client["last_checked_ok"] = None

522

client["last_checker_status"] = -2

523

499

client["last_checker_status"] = None

500

if client["enabled"]:

501

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

502

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

503

+ client["timeout"])

504

else:

505

client["last_enabled"] = None

506

client["expires"] = None

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524

508

return settings

525

526

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

509

510

511

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

512

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

513

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

514

attribute."""

527

515

self.name = name

528

if server_settings is None:

529

server_settings = {}

530

self.server_settings = server_settings

531

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# adding all client settings

532

for setting, value in settings.items():

517

for setting, value in settings.iteritems():

533

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setattr(self, setting, value)

534

519

535

if self.enabled:

536

if not hasattr(self, "last_enabled"):

537

self.last_enabled = datetime.datetime.utcnow()

538

if not hasattr(self, "expires"):

539

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

540

+ self.timeout)

541

else:

542

self.last_enabled = None

543

self.expires = None

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545

520

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

521

# Uppercase and remove spaces from fingerprint for later

522

# comparison purposes with return value from the fingerprint()

523

# function

546

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

547

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

548

datetime.datetime.utcnow())

549

525

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

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# attributes specific for this server instance

551

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self.checker = None

552

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self.checker_initiator_tag = None

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532

self.current_checker_command = None

556

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self.approved = None

557

534

self.approvals_pending = 0

558

self.changedstate = multiprocessing_manager.Condition(

559

multiprocessing_manager.Lock())

560

self.client_structure = [attr

561

for attr in self.__dict__.iterkeys()

535

self.changedstate = (multiprocessing_manager

536

.Condition(multiprocessing_manager

537

.Lock()))

538

self.client_structure = [attr for attr in

539

self.__dict__.iterkeys()

562

540

if not attr.startswith("_")]

563

541

self.client_structure.append("client_structure")

564

542

565

for name, t in inspect.getmembers(

566

type(self), lambda obj: isinstance(obj, property)):

543

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

544

lambda obj:

545

isinstance(obj,

546

property)):

567

547

if not name.startswith("_"):

568

548

self.client_structure.append(name)

569

549

577

557

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

578

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# Already enabled

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559

return

560

self.send_changedstate()

580

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

581

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self.enabled = True

582

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self.last_enabled = datetime.datetime.utcnow()

583

564

self.init_checker()

584

self.send_changedstate()

585

565

586

566

def disable(self, quiet=True):

587

567

"""Disable this client."""

588

568

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

589

569

return False

590

570

if not quiet:

571

self.send_changedstate()

572

if not quiet:

591

573

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

592

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

574

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

593

575

gobject.source_remove(self.disable_initiator_tag)

594

576

self.disable_initiator_tag = None

595

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self.expires = None

596

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

578

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

597

579

gobject.source_remove(self.checker_initiator_tag)

598

580

self.checker_initiator_tag = None

599

581

self.stop_checker()

600

582

self.enabled = False

601

if not quiet:

602

self.send_changedstate()

603

583

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

604

584

return False

605

585

609

589

def init_checker(self):

610

590

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

611

591

# and every interval from then on.

612

if self.checker_initiator_tag is not None:

613

gobject.source_remove(self.checker_initiator_tag)

614

self.checker_initiator_tag = gobject.timeout_add(

615

int(self.interval.total_seconds() * 1000),

616

self.start_checker)

592

self.checker_initiator_tag = (gobject.timeout_add

593

(self.interval_milliseconds(),

594

self.start_checker))

617

595

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

618

if self.disable_initiator_tag is not None:

619

gobject.source_remove(self.disable_initiator_tag)

620

self.disable_initiator_tag = gobject.timeout_add(

621

int(self.timeout.total_seconds() * 1000), self.disable)

596

self.disable_initiator_tag = (gobject.timeout_add

597

(self.timeout_milliseconds(),

598

self.disable))

622

599

# Also start a new checker *right now*.

623

600

self.start_checker()

624

601

633

610

vars(self))

634

611

self.checked_ok()

635

612

else:

636

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

613

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

614

vars(self))

637

615

else:

638

616

self.last_checker_status = -1

639

617

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

640

618

vars(self))

641

619

642

def checked_ok(self):

643

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

644

self.last_checked_ok = datetime.datetime.utcnow()

645

self.last_checker_status = 0

646

self.bump_timeout()

647

648

def bump_timeout(self, timeout=None):

649

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

620

def checked_ok(self, timeout=None):

621

"""Bump up the timeout for this client.

622

623

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

624

alive and well.

625

"""

650

626

if timeout is None:

651

627

timeout = self.timeout

628

self.last_checked_ok = datetime.datetime.utcnow()

652

629

if self.disable_initiator_tag is not None:

653

630

gobject.source_remove(self.disable_initiator_tag)

654

self.disable_initiator_tag = None

655

631

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

656

self.disable_initiator_tag = gobject.timeout_add(

657

int(timeout.total_seconds() * 1000), self.disable)

632

self.disable_initiator_tag = (gobject.timeout_add

633

(timedelta_to_milliseconds

634

(timeout), self.disable))

658

635

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

659

636

660

637

def need_approval(self):

666

643

If a checker already exists, leave it running and do

667

644

nothing."""

668

645

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

669

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

670

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

671

# would inevitably timeout, since no checker would get a

672

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

646

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

647

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

648

# client would inevitably timeout, since no checker would get

649

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

673

650

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

674

651

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

675

652

# should be.

677

654

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

678

655

try:

679

656

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

680

except AttributeError:

681

pass

682

except OSError as error:

683

if error.errno != errno.ECHILD:

684

raise

657

except (AttributeError, OSError) as error:

658

if (isinstance(error, OSError)

659

and error.errno != errno.ECHILD):

660

raise error

685

661

else:

686

662

if pid:

687

663

logger.warning("Checker was a zombie")

690

666

self.current_checker_command)

691

667

# Start a new checker if needed

692

668

if self.checker is None:

693

# Escape attributes for the shell

694

escaped_attrs = {

695

attr: re.escape(str(getattr(self, attr)))

696

for attr in self.runtime_expansions }

697

669

try:

698

command = self.checker_command % escaped_attrs

699

except TypeError as error:

700

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

701

self.checker_command,

702

exc_info=error)

703

return True # Try again later

670

# In case checker_command has exactly one % operator

671

command = self.checker_command % self.host

672

except TypeError:

673

# Escape attributes for the shell

674

escaped_attrs = dict(

675

(attr,

676

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

677

errors=

678

'replace')))

679

for attr in

680

self.runtime_expansions)

681

682

try:

683

command = self.checker_command % escaped_attrs

684

except TypeError as error:

685

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

686

' %s', self.checker_command, error)

687

return True # Try again later

704

688

self.current_checker_command = command

705

689

try:

706

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

707

self.name)

690

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

691

command, self.name)

708

692

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

709

693

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

710

694

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

711

695

# always replaced by /dev/null.)

712

# The exception is when not debugging but nevertheless

713

# running in the foreground; use the previously

714

# created wnull.

715

popen_args = {}

716

if (not self.server_settings["debug"]

717

and self.server_settings["foreground"]):

718

popen_args.update({"stdout": wnull,

719

"stderr": wnull })

720

696

self.checker = subprocess.Popen(command,

721

697

close_fds=True,

722

shell=True,

723

cwd="/",

724

**popen_args)

725

except OSError as error:

726

logger.error("Failed to start subprocess",

727

exc_info=error)

728

return True

729

self.checker_callback_tag = gobject.child_watch_add(

730

self.checker.pid, self.checker_callback, data=command)

731

# The checker may have completed before the gobject

732

# watch was added. Check for this.

733

try:

698

shell=True, cwd="/")

699

self.checker_callback_tag = (gobject.child_watch_add

700

(self.checker.pid,

701

self.checker_callback,

702

data=command))

703

# The checker may have completed before the gobject

704

# watch was added. Check for this.

734

705

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

706

if pid:

707

gobject.source_remove(self.checker_callback_tag)

708

self.checker_callback(pid, status, command)

735

709

except OSError as error:

736

if error.errno == errno.ECHILD:

737

# This should never happen

738

logger.error("Child process vanished",

739

exc_info=error)

740

return True

741

raise

742

if pid:

743

gobject.source_remove(self.checker_callback_tag)

744

self.checker_callback(pid, status, command)

710

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

711

error)

745

712

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

746

713

return True

747

714

754

721

return

755

722

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

756

723

try:

757

self.checker.terminate()

724

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

758

725

#time.sleep(0.5)

759

726

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

760

# self.checker.kill()

727

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

761

728

except OSError as error:

762

729

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

763

730

raise

764

731

self.checker = None

765

732

766

733

767

def dbus_service_property(dbus_interface,

768

signature="v",

769

access="readwrite",

770

byte_arrays=False):

734

def dbus_service_property(dbus_interface, signature="v",

735

access="readwrite", byte_arrays=False):

771

736

"""Decorators for marking methods of a DBusObjectWithProperties to

772

737

become properties on the D-Bus.

773

738

782

747

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

783

748

if byte_arrays and signature != "ay":

784

749

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

785

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

786

750

" signature %r" % signature)

787

751

def decorator(func):

788

752

func._dbus_is_property = True

789

753

func._dbus_interface = dbus_interface

794

758

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

795

759

func._dbus_get_args_options = {'byte_arrays': byte_arrays }

796

760

return func

797

798

return decorator

799

800

801

def dbus_interface_annotations(dbus_interface):

802

"""Decorator for marking functions returning interface annotations

803

804

Usage:

805

806

@dbus_interface_annotations("org.example.Interface")

807

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

808

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

809

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

810

"false"}

811

"""

812

813

def decorator(func):

814

func._dbus_is_interface = True

815

func._dbus_interface = dbus_interface

816

func._dbus_name = dbus_interface

817

return func

818

819

return decorator

820

821

822

def dbus_annotations(annotations):

823

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

824

Usage:

825

826

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

827

"org.freedesktop.DBus.Property."

828

"EmitsChangedSignal": "false"})

829

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

830

access="r")

831

def Property_dbus_property(self):

832

return dbus.Boolean(False)

833

"""

834

835

def decorator(func):

836

func._dbus_annotations = annotations

837

return func

838

839

761

return decorator

840

762

841

763

842

764

class DBusPropertyException(dbus.exceptions.DBusException):

843

765

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

844

766

"""

845

pass

767

def __unicode__(self):

768

return unicode(str(self))

846

769

847

770

848

771

class DBusPropertyAccessException(DBusPropertyException):

866

789

"""

867

790

868

791

@staticmethod

869

def _is_dbus_thing(thing):

870

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

871

872

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

873

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

874

"""

875

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

876

False)

792

def _is_dbus_property(obj):

793

return getattr(obj, "_dbus_is_property", False)

877

794

878

def _get_all_dbus_things(self, thing):

795

def _get_all_dbus_properties(self):

879

796

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

880

797

"""

881

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

882

athing.__get__(self))

798

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

883

799

for cls in self.__class__.__mro__

884

for name, athing in

885

inspect.getmembers(cls, self._is_dbus_thing(thing)))

800

for name, prop in

801

inspect.getmembers(cls, self._is_dbus_property))

886

802

887

803

def _get_dbus_property(self, interface_name, property_name):

888

804

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

889

805

property with the specified name and interface.

890

806

"""

891

for cls in self.__class__.__mro__:

892

for name, value in inspect.getmembers(

893

cls, self._is_dbus_thing("property")):

807

for cls in self.__class__.__mro__:

808

for name, value in (inspect.getmembers

809

(cls, self._is_dbus_property)):

894

810

if (value._dbus_name == property_name

895

811

and value._dbus_interface == interface_name):

896

812

return value.__get__(self)

897

813

898

814

# No such property

899

raise DBusPropertyNotFound("{}:{}.{}".format(

900

self.dbus_object_path, interface_name, property_name))

815

raise DBusPropertyNotFound(self.dbus_object_path + ":"

816

+ interface_name + "."

817

+ property_name)

901

818

902

@dbus.service.method(dbus.PROPERTIES_IFACE,

903

in_signature="ss",

819

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

904

820

out_signature="v")

905

821

def Get(self, interface_name, property_name):

906

822

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

924

840

# The byte_arrays option is not supported yet on

925

841

# signatures other than "ay".

926

842

if prop._dbus_signature != "ay":

927

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

928

"'ay' signature {!r}"

929

.format(prop._dbus_signature))

930

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

931

for byte in value))

843

raise ValueError

844

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

845

for byte in value))

932

846

prop(value)

933

847

934

@dbus.service.method(dbus.PROPERTIES_IFACE,

935

in_signature="s",

848

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

936

849

out_signature="a{sv}")

937

850

def GetAll(self, interface_name):

938

851

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

941

854

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

942

855

"""

943

856

properties = {}

944

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

857

for name, prop in self._get_all_dbus_properties():

945

858

if (interface_name

946

859

and interface_name != prop._dbus_interface):

947

860

# Interface non-empty but did not match

953

866

if not hasattr(value, "variant_level"):

954

867

properties[name] = value

955

868

continue

956

properties[name] = type(value)(

957

value, variant_level = value.variant_level + 1)

869

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

870

value.variant_level+1)

958

871

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

959

872

960

@dbus.service.signal(dbus.PROPERTIES_IFACE, signature="sa{sv}as")

961

def PropertiesChanged(self, interface_name, changed_properties,

962

invalidated_properties):

963

"""Standard D-Bus PropertiesChanged() signal, see D-Bus

964

standard.

965

"""

966

pass

967

968

873

@dbus.service.method(dbus.INTROSPECTABLE_IFACE,

969

874

out_signature="s",

970

875

path_keyword='object_path',

971

876

connection_keyword='connection')

972

877

def Introspect(self, object_path, connection):

973

"""Overloading of standard D-Bus method.

974

975

Inserts property tags and interface annotation tags.

878

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

976

879

"""

977

880

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

978

881

connection)

979

882

try:

980

883

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

981

982

884

def make_tag(document, name, prop):

983

885

e = document.createElement("property")

984

886

e.setAttribute("name", name)

985

887

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

986

888

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

987

889

return e

988

989

890

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

990

# Add property tags

991

891

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

992

892

for name, prop

993

in self._get_all_dbus_things("property")

893

in self._get_all_dbus_properties()

994

894

if prop._dbus_interface

995

895

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

996

896

if_tag.appendChild(tag)

997

# Add annotation tags

998

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

999

for tag in if_tag.getElementsByTagName(typ):

1000

annots = dict()

1001

for name, prop in (self.

1002

_get_all_dbus_things(typ)):

1003

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

1004

and prop._dbus_interface

1005

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

1006

annots.update(getattr(

1007

prop, "_dbus_annotations", {}))

1008

for name, value in annots.items():

1009

ann_tag = document.createElement(

1010

"annotation")

1011

ann_tag.setAttribute("name", name)

1012

ann_tag.setAttribute("value", value)

1013

tag.appendChild(ann_tag)

1014

# Add interface annotation tags

1015

for annotation, value in dict(

1016

itertools.chain.from_iterable(

1017

annotations().items()

1018

for name, annotations

1019

in self._get_all_dbus_things("interface")

1020

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

1021

)).items():

1022

ann_tag = document.createElement("annotation")

1023

ann_tag.setAttribute("name", annotation)

1024

ann_tag.setAttribute("value", value)

1025

if_tag.appendChild(ann_tag)

1026

897

# Add the names to the return values for the

1027

898

# "org.freedesktop.DBus.Properties" methods

1028

899

if (if_tag.getAttribute("name")

1043

914

except (AttributeError, xml.dom.DOMException,

1044

915

xml.parsers.expat.ExpatError) as error:

1045

916

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

1046

exc_info=error)

917

error)

1047

918

return xmlstring

1048

919

1049

920

1050

def datetime_to_dbus(dt, variant_level=0):

921

def datetime_to_dbus (dt, variant_level=0):

1051

922

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

1052

923

if dt is None:

1053

924

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

1054

return dbus.String(dt.isoformat(), variant_level=variant_level)

1055

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).

925

return dbus.String(dt.isoformat(),

926

variant_level=variant_level)

927

928

929

class AlternateDBusNamesMetaclass(DBusObjectWithProperties

930

.__metaclass__):

931

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

932

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

1079

933

"""

1080

1081

def wrapper(cls):

1082

for orig_interface_name, alt_interface_name in (

1083

alt_interface_names.items()):

1084

attr = {}

1085

interface_names = set()

1086

# Go though all attributes of the class

1087

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

934

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

935

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

936

# methods, signals, or properties in them

937

for base in (b for b in bases

938

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

939

# Go though all attributes of the base class

940

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

1088

941

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

1089

942

# with the wrong interface name

1090

943

if (not hasattr(attribute, "_dbus_interface")

1091

or not attribute._dbus_interface.startswith(

1092

orig_interface_name)):

944

or not attribute._dbus_interface

945

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

1093

946

continue

1094

947

# Create an alternate D-Bus interface name based on

1095

948

# the current name

1096

alt_interface = attribute._dbus_interface.replace(

1097

orig_interface_name, alt_interface_name)

1098

interface_names.add(alt_interface)

949

alt_interface = (attribute._dbus_interface

950

.replace("se.recompile.Mandos",

951

"se.bsnet.fukt.Mandos"))

1099

952

# Is this a D-Bus signal?

1100

953

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

1101

# Extract the original non-method undecorated

1102

# function by black magic

954

# Extract the original non-method function by

955

# black magic

1103

956

nonmethod_func = (dict(

1104

zip(attribute.func_code.co_freevars,

1105

attribute.__closure__))

1106

["func"].cell_contents)

957

zip(attribute.func_code.co_freevars,

958

attribute.__closure__))["func"]

959

.cell_contents)

1107

960

# Create a new, but exactly alike, function

1108

961

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

1109

962

# with the alternate D-Bus interface name

1110

new_function = (dbus.service.signal(

1111

alt_interface, attribute._dbus_signature)

963

new_function = (dbus.service.signal

964

(alt_interface,

965

attribute._dbus_signature)

1112

966

(types.FunctionType(

1113

nonmethod_func.func_code,

1114

nonmethod_func.func_globals,

1115

nonmethod_func.func_name,

1116

nonmethod_func.func_defaults,

1117

nonmethod_func.func_closure)))

1118

# Copy annotations, if any

1119

try:

1120

new_function._dbus_annotations = dict(

1121

attribute._dbus_annotations)

1122

except AttributeError:

1123

pass

967

nonmethod_func.func_code,

968

nonmethod_func.func_globals,

969

nonmethod_func.func_name,

970

nonmethod_func.func_defaults,

971

nonmethod_func.func_closure)))

1124

972

# Define a creator of a function to call both the

1125

# original and alternate functions, so both the

1126

# original and alternate signals gets sent when

1127

# the function is called

973

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

974

# signals gets sent when the function is called

1128

975

def fixscope(func1, func2):

1129

976

"""This function is a scope container to pass

1130

977

func1 and func2 to the "call_both" function

1131

978

outside of its arguments"""

1132

1133

979

def call_both(*args, **kwargs):

1134

980

"""This function will emit two D-Bus

1135

981

signals by calling func1 and func2"""

1136

982

func1(*args, **kwargs)

1137

983

func2(*args, **kwargs)

1138

1139

984

return call_both

1140

985

# Create the "call_both" function and add it to

1141

986

# the class

1142

attr[attrname] = fixscope(attribute, new_function)

987

attr[attrname] = fixscope(attribute,

988

new_function)

1143

989

# Is this a D-Bus method?

1144

990

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

1145

991

# Create a new, but exactly alike, function

1146

992

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

1147

993

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

1148

994

# to the class.

1149

attr[attrname] = (

1150

dbus.service.method(

1151

alt_interface,

1152

attribute._dbus_in_signature,

1153

attribute._dbus_out_signature)

1154

(types.FunctionType(attribute.func_code,

1155

attribute.func_globals,

1156

attribute.func_name,

1157

attribute.func_defaults,

1158

attribute.func_closure)))

1159

# Copy annotations, if any

1160

try:

1161

attr[attrname]._dbus_annotations = dict(

1162

attribute._dbus_annotations)

1163

except AttributeError:

1164

pass

995

attr[attrname] = (dbus.service.method

996

(alt_interface,

997

attribute._dbus_in_signature,

998

attribute._dbus_out_signature)

999

(types.FunctionType

1000

(attribute.func_code,

1001

attribute.func_globals,

1002

attribute.func_name,

1003

attribute.func_defaults,

1004

attribute.func_closure)))

1165

1005

# Is this a D-Bus property?

1166

1006

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

1167

1007

# Create a new, but exactly alike, function

1168

1008

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

1169

1009

# property with the alternate D-Bus interface

1170

1010

# name. Add it to the class.

1171

attr[attrname] = (dbus_service_property(

1172

alt_interface, attribute._dbus_signature,

1173

attribute._dbus_access,

1174

attribute._dbus_get_args_options

1175

["byte_arrays"])

1176

(types.FunctionType(

1177

attribute.func_code,

1178

attribute.func_globals,

1179

attribute.func_name,

1180

attribute.func_defaults,

1181

attribute.func_closure)))

1182

# Copy annotations, if any

1183

try:

1184

attr[attrname]._dbus_annotations = dict(

1185

attribute._dbus_annotations)

1186

except AttributeError:

1187

pass

1188

# Is this a D-Bus interface?

1189

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

1190

# Create a new, but exactly alike, function

1191

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

1192

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

1193

# to the class.

1194

attr[attrname] = (

1195

dbus_interface_annotations(alt_interface)

1196

(types.FunctionType(attribute.func_code,

1197

attribute.func_globals,

1198

attribute.func_name,

1199

attribute.func_defaults,

1200

attribute.func_closure)))

1201

if deprecate:

1202

# Deprecate all alternate interfaces

1203

iname="_AlternateDBusNames_interface_annotation{}"

1204

for interface_name in interface_names:

1205

1206

@dbus_interface_annotations(interface_name)

1207

def func(self):

1208

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

1209

"true" }

1210

# Find an unused name

1211

for aname in (iname.format(i)

1212

for i in itertools.count()):

1213

if aname not in attr:

1214

attr[aname] = func

1215

break

1216

if interface_names:

1217

# Replace the class with a new subclass of it with

1218

# methods, signals, etc. as created above.

1219

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

1220

(cls, ), attr)

1221

return cls

1222

1223

return wrapper

1224

1225

1226

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

1227

"se.bsnet.fukt.Mandos"})

1011

attr[attrname] = (dbus_service_property

1012

(alt_interface,

1013

attribute._dbus_signature,

1014

attribute._dbus_access,

1015

attribute

1016

._dbus_get_args_options

1017

["byte_arrays"])

1018

(types.FunctionType

1019

(attribute.func_code,

1020

attribute.func_globals,

1021

attribute.func_name,

1022

attribute.func_defaults,

1023

attribute.func_closure)))

1024

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

1025

1026

1228

1027

class ClientDBus(Client, DBusObjectWithProperties):

1229

1028

"""A Client class using D-Bus

1230

1029

1234

1033

"""

1235

1034

1236

1035

runtime_expansions = (Client.runtime_expansions

1237

+ ("dbus_object_path", ))

1238

1239

_interface = "se.recompile.Mandos.Client"

1036

+ ("dbus_object_path",))

1240

1037

1241

1038

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

1242

1039

1243

1040

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

1244

1041

self.bus = bus

1245

1042

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

1043

self._approvals_pending = 0

1044

1045

self._approvals_pending = 0

1246

1046

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

1247

1047

# the D-Bus

1248

client_object_name = str(self.name).translate(

1048

client_object_name = unicode(self.name).translate(

1249

1049

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

1250

1050

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

1251

self.dbus_object_path = dbus.ObjectPath(

1252

"/clients/" + client_object_name)

1051

self.dbus_object_path = (dbus.ObjectPath

1052

("/clients/" + client_object_name))

1253

1053

DBusObjectWithProperties.__init__(self, self.bus,

1254

1054

self.dbus_object_path)

1255

1256

def notifychangeproperty(transform_func, dbus_name,

1257

type_func=lambda x: x,

1258

variant_level=1,

1259

invalidate_only=False,

1260

_interface=_interface):

1055

1056

def notifychangeproperty(transform_func,

1057

dbus_name, type_func=lambda x: x,

1058

variant_level=1):

1261

1059

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

1262

1060

its changes to DBus.

1263

1061

1268

1066

to the D-Bus. Default: no transform

1269

1067

variant_level: D-Bus variant level. Default: 1

1270

1068

"""

1271

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

1272

1069

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

1273

1070

def setter(self, value):

1274

1071

if hasattr(self, "dbus_object_path"):

1275

1072

if (not hasattr(self, attrname) or

1276

1073

type_func(getattr(self, attrname, None))

1277

1074

!= type_func(value)):

1278

if invalidate_only:

1279

self.PropertiesChanged(

1280

_interface, dbus.Dictionary(),

1281

dbus.Array((dbus_name, )))

1282

else:

1283

dbus_value = transform_func(

1284

type_func(value),

1285

variant_level = variant_level)

1286

self.PropertyChanged(dbus.String(dbus_name),

1287

dbus_value)

1288

self.PropertiesChanged(

1289

_interface,

1290

dbus.Dictionary({ dbus.String(dbus_name):

1291

dbus_value }),

1292

dbus.Array())

1075

dbus_value = transform_func(type_func(value),

1076

variant_level

1077

=variant_level)

1078

self.PropertyChanged(dbus.String(dbus_name),

1079

dbus_value)

1293

1080

setattr(self, attrname, value)

1294

1081

1295

1082

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

1296

1083

1084

1297

1085

expires = notifychangeproperty(datetime_to_dbus, "Expires")

1298

1086

approvals_pending = notifychangeproperty(dbus.Boolean,

1299

1087

"ApprovalPending",

1301

1089

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

1302

1090

last_enabled = notifychangeproperty(datetime_to_dbus,

1303

1091

"LastEnabled")

1304

checker = notifychangeproperty(

1305

dbus.Boolean, "CheckerRunning",

1306

type_func = lambda checker: checker is not None)

1092

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

1093

type_func = lambda checker:

1094

checker is not None)

1307

1095

last_checked_ok = notifychangeproperty(datetime_to_dbus,

1308

1096

"LastCheckedOK")

1309

last_checker_status = notifychangeproperty(dbus.Int16,

1310

"LastCheckerStatus")

1311

1097

last_approval_request = notifychangeproperty(

1312

1098

datetime_to_dbus, "LastApprovalRequest")

1313

1099

approved_by_default = notifychangeproperty(dbus.Boolean,

1314

1100

"ApprovedByDefault")

1315

approval_delay = notifychangeproperty(

1316

dbus.UInt64, "ApprovalDelay",

1317

type_func = lambda td: td.total_seconds() * 1000)

1101

approval_delay = notifychangeproperty(dbus.UInt64,

1102

"ApprovalDelay",

1103

type_func =

1104

timedelta_to_milliseconds)

1318

1105

approval_duration = notifychangeproperty(

1319

1106

dbus.UInt64, "ApprovalDuration",

1320

type_func = lambda td: td.total_seconds() * 1000)

1107

type_func = timedelta_to_milliseconds)

1321

1108

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

1322

timeout = notifychangeproperty(

1323

dbus.UInt64, "Timeout",

1324

type_func = lambda td: td.total_seconds() * 1000)

1109

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

1110

type_func =

1111

timedelta_to_milliseconds)

1325

1112

extended_timeout = notifychangeproperty(

1326

1113

dbus.UInt64, "ExtendedTimeout",

1327

type_func = lambda td: td.total_seconds() * 1000)

1328

interval = notifychangeproperty(

1329

dbus.UInt64, "Interval",

1330

type_func = lambda td: td.total_seconds() * 1000)

1114

type_func = timedelta_to_milliseconds)

1115

interval = notifychangeproperty(dbus.UInt64,

1116

"Interval",

1117

type_func =

1118

timedelta_to_milliseconds)

1331

1119

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

1332

secret = notifychangeproperty(dbus.ByteArray, "Secret",

1333

invalidate_only=True)

1334

1120

1335

1121

del notifychangeproperty

1336

1122

1363

1149

*args, **kwargs)

1364

1150

1365

1151

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

1366

old_checker_pid = getattr(self.checker, "pid", None)

1152

old_checker = self.checker

1153

if self.checker is not None:

1154

old_checker_pid = self.checker.pid

1155

else:

1156

old_checker_pid = None

1367

1157

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

1368

1158

# Only if new checker process was started

1369

1159

if (self.checker is not None

1377

1167

return False

1378

1168

1379

1169

def approve(self, value=True):

1170

self.send_changedstate()

1380

1171

self.approved = value

1381

gobject.timeout_add(int(self.approval_duration.total_seconds()

1382

* 1000), self._reset_approved)

1383

self.send_changedstate()

1172

gobject.timeout_add(timedelta_to_milliseconds

1173

(self.approval_duration),

1174

self._reset_approved)

1175

1384

1176

1385

1177

## D-Bus methods, signals & properties

1386

1387

## Interfaces

1178

_interface = "se.recompile.Mandos.Client"

1388

1179

1389

1180

## Signals

1390

1181

1401

1192

pass

1402

1193

1403

1194

# PropertyChanged - signal

1404

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

1405

1195

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

1406

1196

def PropertyChanged(self, property, value):

1407

1197

"D-Bus signal"

1428

1218

"D-Bus signal"

1429

1219

return self.need_approval()

1430

1220

1221

# NeRwequest - signal

1222

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

1223

def NewRequest(self, ip):

1224

"""D-Bus signal

1225

Is sent after a client request a password.

1226

"""

1227

pass

1228

1431

1229

## Methods

1432

1230

1433

1231

# Approve - method

1471

1269

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

1472

1270

1473

1271

# ApprovedByDefault - property

1474

@dbus_service_property(_interface,

1475

signature="b",

1272

@dbus_service_property(_interface, signature="b",

1476

1273

access="readwrite")

1477

1274

def ApprovedByDefault_dbus_property(self, value=None):

1478

1275

if value is None: # get

1480

1277

self.approved_by_default = bool(value)

1481

1278

1482

1279

# ApprovalDelay - property

1483

@dbus_service_property(_interface,

1484

signature="t",

1280

@dbus_service_property(_interface, signature="t",

1485

1281

access="readwrite")

1486

1282

def ApprovalDelay_dbus_property(self, value=None):

1487

1283

if value is None: # get

1488

return dbus.UInt64(self.approval_delay.total_seconds()

1489

* 1000)

1284

return dbus.UInt64(self.approval_delay_milliseconds())

1490

1285

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

1491

1286

1492

1287

# ApprovalDuration - property

1493

@dbus_service_property(_interface,

1494

signature="t",

1288

@dbus_service_property(_interface, signature="t",

1495

1289

access="readwrite")

1496

1290

def ApprovalDuration_dbus_property(self, value=None):

1497

1291

if value is None: # get

1498

return dbus.UInt64(self.approval_duration.total_seconds()

1499

* 1000)

1292

return dbus.UInt64(timedelta_to_milliseconds(

1293

self.approval_duration))

1500

1294

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

1501

1295

1502

1296

# Name - property

1510

1304

return dbus.String(self.fingerprint)

1511

1305

1512

1306

# Host - property

1513

@dbus_service_property(_interface,

1514

signature="s",

1307

@dbus_service_property(_interface, signature="s",

1515

1308

access="readwrite")

1516

1309

def Host_dbus_property(self, value=None):

1517

1310

if value is None: # get

1518

1311

return dbus.String(self.host)

1519

self.host = str(value)

1312

self.host = unicode(value)

1520

1313

1521

1314

# Created - property

1522

1315

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

1529

1322

return datetime_to_dbus(self.last_enabled)

1530

1323

1531

1324

# Enabled - property

1532

@dbus_service_property(_interface,

1533

signature="b",

1325

@dbus_service_property(_interface, signature="b",

1534

1326

access="readwrite")

1535

1327

def Enabled_dbus_property(self, value=None):

1536

1328

if value is None: # get

1541

1333

self.disable()

1542

1334

1543

1335

# LastCheckedOK - property

1544

@dbus_service_property(_interface,

1545

signature="s",

1336

@dbus_service_property(_interface, signature="s",

1546

1337

access="readwrite")

1547

1338

def LastCheckedOK_dbus_property(self, value=None):

1548

1339

if value is not None:

1550

1341

return

1551

1342

return datetime_to_dbus(self.last_checked_ok)

1552

1343

1553

# LastCheckerStatus - property

1554

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

1555

def LastCheckerStatus_dbus_property(self):

1556

return dbus.Int16(self.last_checker_status)

1557

1558

1344

# Expires - property

1559

1345

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

1560

1346

def Expires_dbus_property(self):

1566

1352

return datetime_to_dbus(self.last_approval_request)

1567

1353

1568

1354

# Timeout - property

1569

@dbus_service_property(_interface,

1570

signature="t",

1355

@dbus_service_property(_interface, signature="t",

1571

1356

access="readwrite")

1572

1357

def Timeout_dbus_property(self, value=None):

1573

1358

if value is None: # get

1574

return dbus.UInt64(self.timeout.total_seconds() * 1000)

1575

old_timeout = self.timeout

1359

return dbus.UInt64(self.timeout_milliseconds())

1576

1360

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

1577

# Reschedule disabling

1578

if self.enabled:

1579

now = datetime.datetime.utcnow()

1580

self.expires += self.timeout - old_timeout

1581

if self.expires <= now:

1582

# The timeout has passed

1583

self.disable()

1584

else:

1585

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

1586

is None):

1587

return

1588

gobject.source_remove(self.disable_initiator_tag)

1589

self.disable_initiator_tag = gobject.timeout_add(

1590

int((self.expires - now).total_seconds() * 1000),

1591

self.disable)

1361

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

1362

return

1363

# Reschedule timeout

1364

gobject.source_remove(self.disable_initiator_tag)

1365

self.disable_initiator_tag = None

1366

self.expires = None

1367

time_to_die = timedelta_to_milliseconds((self

1368

.last_checked_ok

1369

+ self.timeout)

1370

- datetime.datetime

1371

.utcnow())

1372

if time_to_die <= 0:

1373

# The timeout has passed

1374

self.disable()

1375

else:

1376

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

1377

+ datetime.timedelta(milliseconds =

1378

time_to_die))

1379

self.disable_initiator_tag = (gobject.timeout_add

1380

(time_to_die, self.disable))

1592

1381

1593

1382

# ExtendedTimeout - property

1594

@dbus_service_property(_interface,

1595

signature="t",

1383

@dbus_service_property(_interface, signature="t",

1596

1384

access="readwrite")

1597

1385

def ExtendedTimeout_dbus_property(self, value=None):

1598

1386

if value is None: # get

1599

return dbus.UInt64(self.extended_timeout.total_seconds()

1600

* 1000)

1387

return dbus.UInt64(self.extended_timeout_milliseconds())

1601

1388

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

1602

1389

1603

1390

# Interval - property

1604

@dbus_service_property(_interface,

1605

signature="t",

1391

@dbus_service_property(_interface, signature="t",

1606

1392

access="readwrite")

1607

1393

def Interval_dbus_property(self, value=None):

1608

1394

if value is None: # get

1609

return dbus.UInt64(self.interval.total_seconds() * 1000)

1395

return dbus.UInt64(self.interval_milliseconds())

1610

1396

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

1611

1397

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

1612

1398

return

1613

1399

if self.enabled:

1614

1400

# Reschedule checker run

1615

1401

gobject.source_remove(self.checker_initiator_tag)

1616

self.checker_initiator_tag = gobject.timeout_add(

1617

value, self.start_checker)

1618

self.start_checker() # Start one now, too

1402

self.checker_initiator_tag = (gobject.timeout_add

1403

(value, self.start_checker))

1404

self.start_checker() # Start one now, too

1619

1405

1620

1406

# Checker - property

1621

@dbus_service_property(_interface,

1622

signature="s",

1407

@dbus_service_property(_interface, signature="s",

1623

1408

access="readwrite")

1624

1409

def Checker_dbus_property(self, value=None):

1625

1410

if value is None: # get

1626

1411

return dbus.String(self.checker_command)

1627

self.checker_command = str(value)

1412

self.checker_command = unicode(value)

1628

1413

1629

1414

# CheckerRunning - property

1630

@dbus_service_property(_interface,

1631

signature="b",

1415

@dbus_service_property(_interface, signature="b",

1632

1416

access="readwrite")

1633

1417

def CheckerRunning_dbus_property(self, value=None):

1634

1418

if value is None: # get

1644

1428

return self.dbus_object_path # is already a dbus.ObjectPath

1645

1429

1646

1430

# Secret = property

1647

@dbus_service_property(_interface,

1648

signature="ay",

1649

access="write",

1650

byte_arrays=True)

1431

@dbus_service_property(_interface, signature="ay",

1432

access="write", byte_arrays=True)

1651

1433

def Secret_dbus_property(self, value):

1652

self.secret = bytes(value)

1434

self.secret = str(value)

1653

1435

1654

1436

del _interface

1655

1437

1669

1451

if data[0] == 'data':

1670

1452

return data[1]

1671

1453

if data[0] == 'function':

1672

1673

1454

def func(*args, **kwargs):

1674

1455

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

1675

1456

return self._pipe.recv()[1]

1676

1677

1457

return func

1678

1458

1679

1459

def __setattr__(self, name, value):

1682

1462

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

1683

1463

1684

1464

1465

class ClientDBusTransitional(ClientDBus):

1466

__metaclass__ = AlternateDBusNamesMetaclass

1467

1468

1685

1469

class ClientHandler(socketserver.BaseRequestHandler, object):

1686

1470

"""A class to handle client connections.

1687

1471

1691

1475

def handle(self):

1692

1476

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

1693

1477

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

1694

str(self.client_address))

1478

unicode(self.client_address))

1695

1479

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

1696

1480

self.server.child_pipe.fileno())

1697

1481

1698

session = gnutls.connection.ClientSession(

1699

self.request, gnutls.connection .X509Credentials())

1482

session = (gnutls.connection

1483

.ClientSession(self.request,

1484

gnutls.connection

1485

.X509Credentials()))

1700

1486

1701

1487

# Note: gnutls.connection.X509Credentials is really a

1702

1488

# generic GnuTLS certificate credentials object so long as

1711

1497

priority = self.server.gnutls_priority

1712

1498

if priority is None:

1713

1499

priority = "NORMAL"

1714

gnutls.library.functions.gnutls_priority_set_direct(

1715

session._c_object, priority, None)

1500

(gnutls.library.functions

1501

.gnutls_priority_set_direct(session._c_object,

1502

priority, None))

1716

1503

1717

1504

# Start communication using the Mandos protocol

1718

1505

# Get protocol number

1720

1507

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

1721

1508

try:

1722

1509

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

1723

raise RuntimeError(line)

1510

raise RuntimeError

1724

1511

except (ValueError, IndexError, RuntimeError) as error:

1725

1512

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

1726

1513

return

1738

1525

approval_required = False

1739

1526

try:

1740

1527

try:

1741

fpr = self.fingerprint(

1742

self.peer_certificate(session))

1528

fpr = self.fingerprint(self.peer_certificate

1529

(session))

1743

1530

except (TypeError,

1744

1531

gnutls.errors.GNUTLSError) as error:

1745

1532

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

1752

1539

except KeyError:

1753

1540

return

1754

1541

1542

if self.server.use_dbus:

1543

# Emit D-Bus signal

1544

client.NewRequest(str(self.client_address))

1545

1755

1546

if client.approval_delay:

1756

1547

delay = client.approval_delay

1757

1548

client.approvals_pending += 1

1760

1551

while True:

1761

1552

if not client.enabled:

1762

1553

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

1763

client.name)

1554

client.name)

1764

1555

if self.server.use_dbus:

1765

1556

# Emit D-Bus signal

1766

1557

client.Rejected("Disabled")

1775

1566

if self.server.use_dbus:

1776

1567

# Emit D-Bus signal

1777

1568

client.NeedApproval(

1778

client.approval_delay.total_seconds()

1779

* 1000, client.approved_by_default)

1569

client.approval_delay_milliseconds(),

1570

client.approved_by_default)

1780

1571

else:

1781

1572

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

1782

1573

client.name)

1788

1579

#wait until timeout or approved

1789

1580

time = datetime.datetime.now()

1790

1581

client.changedstate.acquire()

1791

client.changedstate.wait(delay.total_seconds())

1582

(client.changedstate.wait

1583

(float(client.timedelta_to_milliseconds(delay)

1584

/ 1000)))

1792

1585

client.changedstate.release()

1793

1586

time2 = datetime.datetime.now()

1794

1587

if (time2 - time) >= delay:

1810

1603

try:

1811

1604

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

1812

1605

except gnutls.errors.GNUTLSError as error:

1813

logger.warning("gnutls send failed",

1814

exc_info=error)

1606

logger.warning("gnutls send failed")

1815

1607

return

1816

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

1817

len(client.secret) - (sent_size

1818

+ sent))

1608

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

1609

sent, len(client.secret)

1610

- (sent_size + sent))

1819

1611

sent_size += sent

1820

1612

1821

1613

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

1822

1614

# bump the timeout using extended_timeout

1823

client.bump_timeout(client.extended_timeout)

1615

client.checked_ok(client.extended_timeout)

1824

1616

if self.server.use_dbus:

1825

1617

# Emit D-Bus signal

1826

1618

client.GotSecret()

1831

1623

try:

1832

1624

session.bye()

1833

1625

except gnutls.errors.GNUTLSError as error:

1834

logger.warning("GnuTLS bye failed",

1835

exc_info=error)

1626

logger.warning("GnuTLS bye failed")

1836

1627

1837

1628

@staticmethod

1838

1629

def peer_certificate(session):

1839

1630

"Return the peer's OpenPGP certificate as a bytestring"

1840

1631

# If not an OpenPGP certificate...

1841

if (gnutls.library.functions.gnutls_certificate_type_get(

1842

session._c_object)

1632

if (gnutls.library.functions

1633

.gnutls_certificate_type_get(session._c_object)

1843

1634

!= gnutls.library.constants.GNUTLS_CRT_OPENPGP):

1844

1635

# ...do the normal thing

1845

1636

return session.peer_certificate

1859

1650

def fingerprint(openpgp):

1860

1651

"Convert an OpenPGP bytestring to a hexdigit fingerprint"

1861

1652

# New GnuTLS "datum" with the OpenPGP public key

1862

datum = gnutls.library.types.gnutls_datum_t(

1863

ctypes.cast(ctypes.c_char_p(openpgp),

1864

ctypes.POINTER(ctypes.c_ubyte)),

1865

ctypes.c_uint(len(openpgp)))

1653

datum = (gnutls.library.types

1654

.gnutls_datum_t(ctypes.cast(ctypes.c_char_p(openpgp),

1655

ctypes.POINTER

1656

(ctypes.c_ubyte)),

1657

ctypes.c_uint(len(openpgp))))

1866

1658

# New empty GnuTLS certificate

1867

1659

crt = gnutls.library.types.gnutls_openpgp_crt_t()

1868

gnutls.library.functions.gnutls_openpgp_crt_init(

1869

ctypes.byref(crt))

1660

(gnutls.library.functions

1661

.gnutls_openpgp_crt_init(ctypes.byref(crt)))

1870

1662

# Import the OpenPGP public key into the certificate

1871

gnutls.library.functions.gnutls_openpgp_crt_import(

1872

crt, ctypes.byref(datum),

1873

gnutls.library.constants.GNUTLS_OPENPGP_FMT_RAW)

1663

(gnutls.library.functions

1664

.gnutls_openpgp_crt_import(crt, ctypes.byref(datum),

1665

gnutls.library.constants

1666

.GNUTLS_OPENPGP_FMT_RAW))

1874

1667

# Verify the self signature in the key

1875

1668

crtverify = ctypes.c_uint()

1876

gnutls.library.functions.gnutls_openpgp_crt_verify_self(

1877

crt, 0, ctypes.byref(crtverify))

1669

(gnutls.library.functions

1670

.gnutls_openpgp_crt_verify_self(crt, 0,

1671

ctypes.byref(crtverify)))

1878

1672

if crtverify.value != 0:

1879

1673

gnutls.library.functions.gnutls_openpgp_crt_deinit(crt)

1880

raise gnutls.errors.CertificateSecurityError(

1881

"Verify failed")

1674

raise (gnutls.errors.CertificateSecurityError

1675

("Verify failed"))

1882

1676

# New buffer for the fingerprint

1883

1677

buf = ctypes.create_string_buffer(20)

1884

1678

buf_len = ctypes.c_size_t()

1885

1679

# Get the fingerprint from the certificate into the buffer

1886

gnutls.library.functions.gnutls_openpgp_crt_get_fingerprint(

1887

crt, ctypes.byref(buf), ctypes.byref(buf_len))

1680

(gnutls.library.functions

1681

.gnutls_openpgp_crt_get_fingerprint(crt, ctypes.byref(buf),

1682

ctypes.byref(buf_len)))

1888

1683

# Deinit the certificate

1889

1684

gnutls.library.functions.gnutls_openpgp_crt_deinit(crt)

1890

1685

# Convert the buffer to a Python bytestring

1896

1691

1897

1692

class MultiprocessingMixIn(object):

1898

1693

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

1899

1900

1694

def sub_process_main(self, request, address):

1901

1695

try:

1902

1696

self.finish_request(request, address)

1907

1701

def process_request(self, request, address):

1908

1702

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

1909

1703

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

1910

args = (request, address))

1704

args = (request,

1705

address))

1911

1706

proc.start()

1912

1707

return proc

1913

1708

1914

1709

1915

1710

class MultiprocessingMixInWithPipe(MultiprocessingMixIn, object):

1916

1711

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

1917

1918

1712

def process_request(self, request, client_address):

1919

1713

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

1920

1714

1929

1723

1930

1724

def add_pipe(self, parent_pipe, proc):

1931

1725

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

1932

raise NotImplementedError()

1726

raise NotImplementedError

1933

1727

1934

1728

1935

1729

class IPv6_TCPServer(MultiprocessingMixInWithPipe,

1941

1735

interface: None or a network interface name (string)

1942

1736

use_ipv6: Boolean; to use IPv6 or not

1943

1737

"""

1944

1945

1738

def __init__(self, server_address, RequestHandlerClass,

1946

interface=None,

1947

use_ipv6=True,

1948

socketfd=None):

1949

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

1950

creating a new one with socket.socket().

1951

"""

1739

interface=None, use_ipv6=True):

1952

1740

self.interface = interface

1953

1741

if use_ipv6:

1954

1742

self.address_family = socket.AF_INET6

1955

if socketfd is not None:

1956

# Save the file descriptor

1957

self.socketfd = socketfd

1958

# Save the original socket.socket() function

1959

self.socket_socket = socket.socket

1960

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

1961

#

1962

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

1963

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

1964

# patching socket.socket.)

1965

#

1966

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

1967

@functools.wraps(socket.socket)

1968

def socket_wrapper(*args, **kwargs):

1969

# Restore original function so subsequent calls are

1970

# not affected.

1971

socket.socket = self.socket_socket

1972

del self.socket_socket

1973

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

1974

# saved file descriptor.

1975

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

1976

# Replace socket.socket() function with wrapper

1977

socket.socket = socket_wrapper

1978

# The socketserver.TCPServer.__init__ will call

1979

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

1980

# socket_wrapper(), if socketfd was set.

1981

1743

socketserver.TCPServer.__init__(self, server_address,

1982

1744

RequestHandlerClass)

1983

1984

1745

def server_bind(self):

1985

1746

"""This overrides the normal server_bind() function

1986

1747

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

1992

1753

self.interface)

1993

1754

else:

1994

1755

try:

1995

self.socket.setsockopt(

1996

socket.SOL_SOCKET, SO_BINDTODEVICE,

1997

(self.interface + "\0").encode("utf-8"))

1756

self.socket.setsockopt(socket.SOL_SOCKET,

1757

SO_BINDTODEVICE,

1758

str(self.interface

1759

+ '\0'))

1998

1760

except socket.error as error:

1999

if error.errno == errno.EPERM:

2000

logger.error("No permission to bind to"

2001

" interface %s", self.interface)

2002

elif error.errno == errno.ENOPROTOOPT:

1761

if error[0] == errno.EPERM:

1762

logger.error("No permission to"

1763

" bind to interface %s",

1764

self.interface)

1765

elif error[0] == errno.ENOPROTOOPT:

2003

1766

logger.error("SO_BINDTODEVICE not available;"

2004

1767

" cannot bind to interface %s",

2005

1768

self.interface)

2006

elif error.errno == errno.ENODEV:

2007

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

2008

" cannot bind", self.interface)

2009

1769

else:

2010

1770

raise

2011

1771

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

2014

1774

if self.address_family == socket.AF_INET6:

2015

1775

any_address = "::" # in6addr_any

2016

1776

else:

2017

any_address = "0.0.0.0" # INADDR_ANY

1777

any_address = socket.INADDR_ANY

2018

1778

self.server_address = (any_address,

2019

1779

self.server_address[1])

2020

1780

elif not self.server_address[1]:

2021

self.server_address = (self.server_address[0], 0)

1781

self.server_address = (self.server_address[0],

1782

0)

2022

1783

# if self.interface:

2023

1784

# self.server_address = (self.server_address[0],

2024

1785

# 0, # port

2038

1799

2039

1800

Assumes a gobject.MainLoop event loop.

2040

1801

"""

2041

2042

1802

def __init__(self, server_address, RequestHandlerClass,

2043

interface=None,

2044

use_ipv6=True,

2045

clients=None,

2046

gnutls_priority=None,

2047

use_dbus=True,

2048

socketfd=None):

1803

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

1804

gnutls_priority=None, use_dbus=True):

2049

1805

self.enabled = False

2050

1806

self.clients = clients

2051

1807

if self.clients is None:

2055

1811

IPv6_TCPServer.__init__(self, server_address,

2056

1812

RequestHandlerClass,

2057

1813

interface = interface,

2058

use_ipv6 = use_ipv6,

2059

socketfd = socketfd)

2060

1814

use_ipv6 = use_ipv6)

2061

1815

def server_activate(self):

2062

1816

if self.enabled:

2063

1817

return socketserver.TCPServer.server_activate(self)

2067

1821

2068

1822

def add_pipe(self, parent_pipe, proc):

2069

1823

# Call "handle_ipc" for both data and EOF events

2070

gobject.io_add_watch(

2071

parent_pipe.fileno(),

2072

gobject.IO_IN | gobject.IO_HUP,

2073

functools.partial(self.handle_ipc,

2074

parent_pipe = parent_pipe,

2075

proc = proc))

1824

gobject.io_add_watch(parent_pipe.fileno(),

1825

gobject.IO_IN | gobject.IO_HUP,

1826

functools.partial(self.handle_ipc,

1827

parent_pipe =

1828

parent_pipe,

1829

proc = proc))

2076

1830

2077

def handle_ipc(self, source, condition,

2078

parent_pipe=None,

2079

proc = None,

2080

client_object=None):

1831

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

1832

proc = None, client_object=None):

1833

condition_names = {

1834

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

1835

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

1836

# blocking).

1837

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

1838

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

1839

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

1840

# broken, usually for pipes and

1841

# sockets).

1842

}

1843

conditions_string = ' | '.join(name

1844

for cond, name in

1845

condition_names.iteritems()

1846

if cond & condition)

2081

1847

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

2082

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

1848

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

2083

1849

# Wait for other process to exit

2084

1850

proc.join()

2085

1851

return False

2106

1872

parent_pipe.send(False)

2107

1873

return False

2108

1874

2109

gobject.io_add_watch(

2110

parent_pipe.fileno(),

2111

gobject.IO_IN | gobject.IO_HUP,

2112

functools.partial(self.handle_ipc,

2113

parent_pipe = parent_pipe,

2114

proc = proc,

2115

client_object = client))

1875

gobject.io_add_watch(parent_pipe.fileno(),

1876

gobject.IO_IN | gobject.IO_HUP,

1877

functools.partial(self.handle_ipc,

1878

parent_pipe =

1879

parent_pipe,

1880

proc = proc,

1881

client_object =

1882

client))

2116

1883

parent_pipe.send(True)

2117

1884

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

2118

1885

# same fileno

2124

1891

2125

1892

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

2126

1893

funcname)(*args,

2127

**kwargs)))

1894

**kwargs)))

2128

1895

2129

1896

if command == 'getattr':

2130

1897

attrname = request[1]

2131

1898

if callable(client_object.__getattribute__(attrname)):

2132

parent_pipe.send(('function', ))

1899

parent_pipe.send(('function',))

2133

1900

else:

2134

parent_pipe.send((

2135

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

1901

parent_pipe.send(('data', client_object

1902

.__getattribute__(attrname)))

2136

1903

2137

1904

if command == 'setattr':

2138

1905

attrname = request[1]

2142

1909

return True

2143

1910

2144

1911

2145

def rfc3339_duration_to_delta(duration):

2146

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

2147

2148

>>> rfc3339_duration_to_delta("P7D")

2149

datetime.timedelta(7)

2150

>>> rfc3339_duration_to_delta("PT60S")

2151

datetime.timedelta(0, 60)

2152

>>> rfc3339_duration_to_delta("PT60M")

2153

datetime.timedelta(0, 3600)

2154

>>> rfc3339_duration_to_delta("PT24H")

2155

datetime.timedelta(1)

2156

>>> rfc3339_duration_to_delta("P1W")

2157

datetime.timedelta(7)

2158

>>> rfc3339_duration_to_delta("PT5M30S")

2159

datetime.timedelta(0, 330)

2160

>>> rfc3339_duration_to_delta("P1DT3M20S")

2161

datetime.timedelta(1, 200)

2162

"""

2163

2164

# Parsing an RFC 3339 duration with regular expressions is not

2165

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

2166

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

2167

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

2168

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

2169

# avoid excessive use of external libraries.

2170

2171

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

2172

Token = collections.namedtuple("Token",

2173

("regexp", # To match token; if

2174

# "value" is not None,

2175

# must have a "group"

2176

# containing digits

2177

"value", # datetime.timedelta or

2178

# None

2179

"followers")) # Tokens valid after

2180

# this token

2181

Token = collections.namedtuple("Token", (

2182

"regexp", # To match token; if "value" is not None, must have

2183

# a "group" containing digits

2184

"value", # datetime.timedelta or None

2185

"followers")) # Tokens valid after this token

2186

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

2187

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

2188

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

2189

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

2190

datetime.timedelta(seconds=1),

2191

frozenset((token_end, )))

2192

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

2193

datetime.timedelta(minutes=1),

2194

frozenset((token_second, token_end)))

2195

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

2196

datetime.timedelta(hours=1),

2197

frozenset((token_minute, token_end)))

2198

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

2199

None,

2200

frozenset((token_hour, token_minute,

2201

token_second)))

2202

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

2203

datetime.timedelta(days=1),

2204

frozenset((token_time, token_end)))

2205

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

2206

datetime.timedelta(weeks=4),

2207

frozenset((token_day, token_end)))

2208

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

2209

datetime.timedelta(weeks=52),

2210

frozenset((token_month, token_end)))

2211

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

2212

datetime.timedelta(weeks=1),

2213

frozenset((token_end, )))

2214

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

2215

frozenset((token_year, token_month,

2216

token_day, token_time,

2217

token_week)))

2218

# Define starting values

2219

value = datetime.timedelta() # Value so far

2220

found_token = None

2221

followers = frozenset((token_duration,)) # Following valid tokens

2222

s = duration # String left to parse

2223

# Loop until end token is found

2224

while found_token is not token_end:

2225

# Search for any currently valid tokens

2226

for token in followers:

2227

match = token.regexp.match(s)

2228

if match is not None:

2229

# Token found

2230

if token.value is not None:

2231

# Value found, parse digits

2232

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

2233

# Add to value so far

2234

value += factor * token.value

2235

# Strip token from string

2236

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

2237

# Go to found token

2238

found_token = token

2239

# Set valid next tokens

2240

followers = found_token.followers

2241

break

2242

else:

2243

# No currently valid tokens were found

2244

raise ValueError("Invalid RFC 3339 duration")

2245

# End token found

2246

return value

2247

2248

2249

1912

def string_to_delta(interval):

2250

1913

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

2251

1914

2262

1925

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

2263

1926

datetime.timedelta(0, 330)

2264

1927

"""

2265

2266

try:

2267

return rfc3339_duration_to_delta(interval)

2268

except ValueError:

2269

pass

2270

2271

1928

timevalue = datetime.timedelta(0)

2272

1929

for s in interval.split():

2273

1930

try:

2274

suffix = s[-1]

1931

suffix = unicode(s[-1])

2275

1932

value = int(s[:-1])

2276

1933

if suffix == "d":

2277

1934

delta = datetime.timedelta(value)

2284

1941

elif suffix == "w":

2285

1942

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

2286

1943

else:

2287

raise ValueError("Unknown suffix {!r}".format(suffix))

2288

except IndexError as e:

1944

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

1945

except (ValueError, IndexError) as e:

2289

1946

raise ValueError(*(e.args))

2290

1947

timevalue += delta

2291

1948

return timevalue

2304

1961

sys.exit()

2305

1962

if not noclose:

2306

1963

# Close all standard open file descriptors

2307

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

1964

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

2308

1965

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

2309

1966

raise OSError(errno.ENODEV,

2310

"{} not a character device"

2311

.format(os.devnull))

1967

"%s not a character device"

1968

% os.path.devnull)

2312

1969

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

2313

1970

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

2314

1971

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

2323

1980

2324

1981

parser = argparse.ArgumentParser()

2325

1982

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

2326

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

1983

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

2327

1984

help="show version number and exit")

2328

1985

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

2329

1986

help="Bind to interface IF")

2335

1992

help="Run self-test")

2336

1993

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

2337

1994

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

2338

" to terminal", default=None)

1995

" to terminal")

2339

1996

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

2340

1997

help="Debug level for stdout output")

2341

1998

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

2348

2005

" files")

2349

2006

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

2350

2007

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

2351

" system bus interface", default=None)

2008

" system bus interface")

2352

2009

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

2353

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

2354

default=None)

2010

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

2355

2011

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

2356

2012

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

2357

" state", default=None)

2358

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

2359

help="Specify a file descriptor to a network"

2360

" socket to use instead of creating one")

2013

" state")

2361

2014

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

2362

2015

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

2363

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

2364

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

2365

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

2366

dest="zeroconf", help="Do not use Zeroconf",

2367

default=None)

2368

2016

2369

2017

options = parser.parse_args()

2370

2018

2371

2019

if options.check:

2372

2020

import doctest

2373

fail_count, test_count = doctest.testmod()

2374

sys.exit(os.EX_OK if fail_count == 0 else 1)

2021

doctest.testmod()

2022

sys.exit()

2375

2023

2376

2024

# Default values for config file for server-global settings

2377

2025

server_defaults = { "interface": "",

2379

2027

"port": "",

2380

2028

"debug": "False",

2381

2029

"priority":

2382

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

2383

":+SIGN-RSA-SHA224:+SIGN-RSA-RMD160",

2030

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

2384

2031

"servicename": "Mandos",

2385

2032

"use_dbus": "True",

2386

2033

"use_ipv6": "True",

2387

2034

"debuglevel": "",

2388

2035

"restore": "True",

2389

"socket": "",

2390

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

2391

"foreground": "False",

2392

"zeroconf": "True",

2393

}

2036

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

2037

}

2394

2038

2395

2039

# Parse config file for server-global settings

2396

2040

server_config = configparser.SafeConfigParser(server_defaults)

2397

2041

del server_defaults

2398

server_config.read(os.path.join(options.configdir, "mandos.conf"))

2042

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

2043

"mandos.conf"))

2399

2044

# Convert the SafeConfigParser object to a dict

2400

2045

server_settings = server_config.defaults()

2401

2046

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

2402

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

2047

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

2403

2048

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

2404

2049

option)

2405

2050

if server_settings["port"]:

2406

2051

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

2407

2052

"port")

2408

if server_settings["socket"]:

2409

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

2410

"socket")

2411

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

2412

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

2413

# happen with a supplied network socket.

2414

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

2415

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

2416

["socket"])

2417

2053

del server_config

2418

2054

2419

2055

# Override the settings from the config file with command line

2420

2056

# options, if set.

2421

2057

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

2422

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

2423

"use_ipv6", "debuglevel", "restore", "statedir",

2424

"socket", "foreground", "zeroconf"):

2058

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

2059

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

2060

"statedir"):

2425

2061

value = getattr(options, option)

2426

2062

if value is not None:

2427

2063

server_settings[option] = value

2428

2064

del options

2429

2065

# Force all strings to be unicode

2430

2066

for option in server_settings.keys():

2431

if isinstance(server_settings[option], bytes):

2432

server_settings[option] = (server_settings[option]

2433

.decode("utf-8"))

2434

# Force all boolean options to be boolean

2435

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

2436

"foreground", "zeroconf"):

2437

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

2438

# Debug implies foreground

2439

if server_settings["debug"]:

2440

server_settings["foreground"] = True

2067

if type(server_settings[option]) is str:

2068

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

2441

2069

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

2442

2070

2443

2071

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

2444

2072

2445

if (not server_settings["zeroconf"]

2446

and not (server_settings["port"]

2447

or server_settings["socket"] != "")):

2448

parser.error("Needs port or socket to work without Zeroconf")

2449

2450

2073

# For convenience

2451

2074

debug = server_settings["debug"]

2452

2075

debuglevel = server_settings["debuglevel"]

2454

2077

use_ipv6 = server_settings["use_ipv6"]

2455

2078

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

2456

2079

stored_state_file)

2457

foreground = server_settings["foreground"]

2458

zeroconf = server_settings["zeroconf"]

2459

2080

2460

2081

if debug:

2461

2082

initlogger(debug, logging.DEBUG)

2467

2088

initlogger(debug, level)

2468

2089

2469

2090

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

2470

syslogger.setFormatter(

2471

logging.Formatter('Mandos ({}) [%(process)d]:'

2472

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

2473

server_settings["servicename"])))

2091

syslogger.setFormatter(logging.Formatter

2092

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

2093

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

2094

% server_settings["servicename"]))

2474

2095

2475

2096

# Parse config file with clients

2476

client_config = configparser.SafeConfigParser(Client

2477

.client_defaults)

2097

client_config = configparser.SafeConfigParser(Client.client_defaults)

2478

2098

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

2479

2099

"clients.conf"))

2480

2100

2481

2101

global mandos_dbus_service

2482

2102

mandos_dbus_service = None

2483

2103

2484

socketfd = None

2485

if server_settings["socket"] != "":

2486

socketfd = server_settings["socket"]

2487

tcp_server = MandosServer(

2488

(server_settings["address"], server_settings["port"]),

2489

ClientHandler,

2490

interface=(server_settings["interface"] or None),

2491

use_ipv6=use_ipv6,

2492

gnutls_priority=server_settings["priority"],

2493

use_dbus=use_dbus,

2494

socketfd=socketfd)

2495

if not foreground:

2496

pidfilename = "/run/mandos.pid"

2497

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

2498

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

2499

pidfile = None

2104

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

2105

server_settings["port"]),

2106

ClientHandler,

2107

interface=(server_settings["interface"]

2108

or None),

2109

use_ipv6=use_ipv6,

2110

gnutls_priority=

2111

server_settings["priority"],

2112

use_dbus=use_dbus)

2113

if not debug:

2114

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

2500

2115

try:

2501

2116

pidfile = open(pidfilename, "w")

2502

except IOError as e:

2503

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

2504

exc_info=e)

2117

except IOError:

2118

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

2505

2119

2506

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

2120

try:

2121

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

2122

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

2123

except KeyError:

2507

2124

try:

2508

uid = pwd.getpwnam(name).pw_uid

2509

gid = pwd.getpwnam(name).pw_gid

2510

break

2125

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

2126

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

2511

2127

except KeyError:

2512

continue

2513

else:

2514

uid = 65534

2515

gid = 65534

2128

try:

2129

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

2130

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

2131

except KeyError:

2132

uid = 65534

2133

gid = 65534

2516

2134

try:

2517

2135

os.setgid(gid)

2518

2136

os.setuid(uid)

2519

2137

except OSError as error:

2520

if error.errno != errno.EPERM:

2521

raise

2138

if error[0] != errno.EPERM:

2139

raise error

2522

2140

2523

2141

if debug:

2524

2142

# Enable all possible GnuTLS debugging

2531

2149

def debug_gnutls(level, string):

2532

2150

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

2533

2151

2534

gnutls.library.functions.gnutls_global_set_log_function(

2535

debug_gnutls)

2152

(gnutls.library.functions

2153

.gnutls_global_set_log_function(debug_gnutls))

2536

2154

2537

2155

# Redirect stdin so all checkers get /dev/null

2538

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

2156

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

2539

2157

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

2540

2158

if null > 2:

2541

2159

os.close(null)

2542

2160

2543

2161

# Need to fork before connecting to D-Bus

2544

if not foreground:

2162

if not debug:

2545

2163

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

2546

2164

daemon()

2547

2165

2548

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

2549

# need to inform gobject that threads will be used.

2550

2166

gobject.threads_init()

2551

2167

2552

2168

global main_loop

2553

2169

# From the Avahi example code

2554

DBusGMainLoop(set_as_default=True)

2170

DBusGMainLoop(set_as_default=True )

2555

2171

main_loop = gobject.MainLoop()

2556

2172

bus = dbus.SystemBus()

2557

2173

# End of Avahi example code

2558

2174

if use_dbus:

2559

2175

try:

2560

2176

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

2561

bus,

2562

do_not_queue=True)

2563

old_bus_name = dbus.service.BusName(

2564

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

2565

do_not_queue=True)

2177

bus, do_not_queue=True)

2178

old_bus_name = (dbus.service.BusName

2179

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

2180

do_not_queue=True))

2566

2181

except dbus.exceptions.NameExistsException as e:

2567

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

2182

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

2568

2183

use_dbus = False

2569

2184

server_settings["use_dbus"] = False

2570

2185

tcp_server.use_dbus = False

2571

if zeroconf:

2572

protocol = avahi.PROTO_INET6 if use_ipv6 else avahi.PROTO_INET

2573

service = AvahiServiceToSyslog(

2574

name = server_settings["servicename"],

2575

servicetype = "_mandos._tcp",

2576

protocol = protocol,

2577

bus = bus)

2578

if server_settings["interface"]:

2579

service.interface = if_nametoindex(

2580

server_settings["interface"].encode("utf-8"))

2186

protocol = avahi.PROTO_INET6 if use_ipv6 else avahi.PROTO_INET

2187

service = AvahiServiceToSyslog(name =

2188

server_settings["servicename"],

2189

servicetype = "_mandos._tcp",

2190

protocol = protocol, bus = bus)

2191

if server_settings["interface"]:

2192

service.interface = (if_nametoindex

2193

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

2581

2194

2582

2195

global multiprocessing_manager

2583

2196

multiprocessing_manager = multiprocessing.Manager()

2584

2197

2585

2198

client_class = Client

2586

2199

if use_dbus:

2587

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

2200

client_class = functools.partial(ClientDBusTransitional,

2201

bus = bus)

2588

2202

2589

2203

client_settings = Client.config_parser(client_config)

2590

2204

old_client_settings = {}

2591

2205

clients_data = {}

2592

2206

2593

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

2594

global wnull

2595

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

2596

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

2597

# mode

2598

if debug or not foreground:

2599

wnull.close()

2600

2601

2207

# Get client data and settings from last running state.

2602

2208

if server_settings["restore"]:

2603

2209

try:

2604

2210

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

2605

clients_data, old_client_settings = pickle.load(

2606

stored_state)

2211

clients_data, old_client_settings = (pickle.load

2212

(stored_state))

2607

2213

os.remove(stored_state_path)

2608

2214

except IOError as e:

2609

if e.errno == errno.ENOENT:

2610

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

2611

" {}".format(os.strerror(e.errno)))

2612

else:

2613

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

2614

exc_info=e)

2215

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

2216

.format(e))

2217

if e.errno != errno.ENOENT:

2615

2218

raise

2616

2219

except EOFError as e:

2617

2220

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

2618

"EOFError:",

2619

exc_info=e)

2221

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

2620

2222

2621

2223

with PGPEngine() as pgp:

2622

for client_name, client in clients_data.items():

2623

# Skip removed clients

2624

if client_name not in client_settings:

2625

continue

2626

2224

for client_name, client in clients_data.iteritems():

2627

2225

# Decide which value to use after restoring saved state.

2628

2226

# We have three different values: Old config file,

2629

2227

# new config file, and saved state.

2634

2232

# For each value in new config, check if it

2635

2233

# differs from the old config value (Except for

2636

2234

# the "secret" attribute)

2637

if (name != "secret"

2638

and (value !=

2639

old_client_settings[client_name][name])):

2235

if (name != "secret" and

2236

value != old_client_settings[client_name]

2237

[name]):

2640

2238

client[name] = value

2641

2239

except KeyError:

2642

2240

pass

2643

2241

2644

2242

# Clients who has passed its expire date can still be

2645

2243

# enabled if its last checker was successful. Clients

2646

# whose checker succeeded before we stored its state is

2647

# assumed to have successfully run all checkers during

2648

# downtime.

2244

# whose checker failed before we stored its state is

2245

# assumed to have failed all checkers during downtime.

2649

2246

if client["enabled"]:

2650

2247

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

2651

2248

if not client["last_checked_ok"]:

2652

2249

logger.warning(

2653

"disabling client {} - Client never "

2654

"performed a successful checker".format(

2655

client_name))

2250

"disabling client {0} - Client never "

2251

"performed a successfull checker"

2252

.format(client["name"]))

2656

2253

client["enabled"] = False

2657

2254

elif client["last_checker_status"] != 0:

2658

2255

logger.warning(

2659

"disabling client {} - Client last"

2660

" checker failed with error code"

2661

" {}".format(

2662

client_name,

2663

client["last_checker_status"]))

2256

"disabling client {0} - Client "

2257

"last checker failed with error code {1}"

2258

.format(client["name"],

2259

client["last_checker_status"]))

2664

2260

client["enabled"] = False

2665

2261

else:

2666

client["expires"] = (

2667

datetime.datetime.utcnow()

2668

+ client["timeout"])

2669

logger.debug("Last checker succeeded,"

2670

" keeping {} enabled".format(

2671

client_name))

2262

client["expires"] = (datetime.datetime

2263

.utcnow()

2264

+ client["timeout"])

2265

2672

2266

try:

2673

client["secret"] = pgp.decrypt(

2674

client["encrypted_secret"],

2675

client_settings[client_name]["secret"])

2267

client["secret"] = (

2268

pgp.decrypt(client["encrypted_secret"],

2269

client_settings[client_name]

2270

["secret"]))

2676

2271

except PGPError:

2677

2272

# If decryption fails, we use secret from new settings

2678

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

2679

client_name))

2680

client["secret"] = (client_settings[client_name]

2681

["secret"])

2273

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

2274

.format(client_name))

2275

client["secret"] = (

2276

client_settings[client_name]["secret"])

2277

2682

2278

2683

2279

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

2684

for client_name in (set(old_client_settings)

2685

- set(client_settings)):

2280

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

2686

2281

del clients_data[client_name]

2687

for client_name in (set(client_settings)

2688

- set(old_client_settings)):

2282

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

2689

2283

clients_data[client_name] = client_settings[client_name]

2690

2691

# Create all client objects

2692

for client_name, client in clients_data.items():

2284

2285

# Create clients all clients

2286

for client_name, client in clients_data.iteritems():

2693

2287

tcp_server.clients[client_name] = client_class(

2694

name = client_name,

2695

settings = client,

2696

server_settings = server_settings)

2288

name = client_name, settings = client)

2697

2289

2698

2290

if not tcp_server.clients:

2699

2291

logger.warning("No clients defined")

2700

2701

if not foreground:

2702

if pidfile is not None:

2703

try:

2704

with pidfile:

2705

pid = os.getpid()

2706

pidfile.write("{}\n".format(pid).encode("utf-8"))

2707

except IOError:

2708

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

2709

pidfilename, pid)

2710

del pidfile

2292

2293

if not debug:

2294

try:

2295

with pidfile:

2296

pid = os.getpid()

2297

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

2298

del pidfile

2299

except IOError:

2300

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

2301

pidfilename, pid)

2302

except NameError:

2303

# "pidfile" was never created

2304

pass

2711

2305

del pidfilename

2306

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

2712

2307

2713

2308

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

2714

2309

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

2715

2310

2716

2311

if use_dbus:

2717

2718

@alternate_dbus_interfaces(

2719

{ "se.recompile.Mandos": "se.bsnet.fukt.Mandos" })

2720

class MandosDBusService(DBusObjectWithProperties):

2312

class MandosDBusService(dbus.service.Object):

2721

2313

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

2722

2723

2314

def __init__(self):

2724

2315

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

2725

2726

2316

_interface = "se.recompile.Mandos"

2727

2317

2728

@dbus_interface_annotations(_interface)

2729

def _foo(self):

2730

return {

2731

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

2732

"false" }

2733

2734

2318

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

2735

2319

def ClientAdded(self, objpath):

2736

2320

"D-Bus signal"

2749

2333

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

2750

2334

def GetAllClients(self):

2751

2335

"D-Bus method"

2752

return dbus.Array(c.dbus_object_path for c in

2336

return dbus.Array(c.dbus_object_path

2337

for c in

2753

2338

tcp_server.clients.itervalues())

2754

2339

2755

2340

@dbus.service.method(_interface,

2757

2342

def GetAllClientsWithProperties(self):

2758

2343

"D-Bus method"

2759

2344

return dbus.Dictionary(

2760

{ c.dbus_object_path: c.GetAll("")

2761

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

2345

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

2346

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

2762

2347

signature="oa{sv}")

2763

2348

2764

2349

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

2777

2362

2778

2363

del _interface

2779

2364

2780

mandos_dbus_service = MandosDBusService()

2365

class MandosDBusServiceTransitional(MandosDBusService):

2366

__metaclass__ = AlternateDBusNamesMetaclass

2367

mandos_dbus_service = MandosDBusServiceTransitional()

2781

2368

2782

2369

def cleanup():

2783

2370

"Cleanup function; run on exit"

2784

if zeroconf:

2785

service.cleanup()

2371

service.cleanup()

2786

2372

2787

2373

multiprocessing.active_children()

2788

wnull.close()

2789

2374

if not (tcp_server.clients or client_settings):

2790

2375

return

2791

2376

2802

2387

2803

2388

# A list of attributes that can not be pickled

2804

2389

# + secret.

2805

exclude = { "bus", "changedstate", "secret",

2806

"checker", "server_settings" }

2807

for name, typ in inspect.getmembers(dbus.service

2808

.Object):

2390

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

2391

"checker"))

2392

for name, typ in (inspect.getmembers

2393

(dbus.service.Object)):

2809

2394

exclude.add(name)

2810

2395

2811

2396

client_dict["encrypted_secret"] = (client

2818

2403

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

2819

2404

2820

2405

try:

2821

with tempfile.NamedTemporaryFile(

2822

mode='wb',

2823

suffix=".pickle",

2824

prefix='clients-',

2825

dir=os.path.dirname(stored_state_path),

2826

delete=False) as stored_state:

2406

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

2407

prefix="clients-",

2408

dir=os.path.dirname

2409

(stored_state_path))

2410

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

2827

2411

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

2828

tempname = stored_state.name

2829

2412

os.rename(tempname, stored_state_path)

2830

2413

except (IOError, OSError) as e:

2414

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

2415

.format(e))

2831

2416

if not debug:

2832

2417

try:

2833

2418

os.remove(tempname)

2834

2419

except NameError:

2835

2420

pass

2836

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

2837

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

2838

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

2839

else:

2840

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

2841

exc_info=e)

2842

raise

2421

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

2422

errno.EEXIST)):

2423

raise e

2843

2424

2844

2425

# Delete all clients, and settings from config

2845

2426

while tcp_server.clients:

2850

2431

client.disable(quiet=True)

2851

2432

if use_dbus:

2852

2433

# Emit D-Bus signal

2853

mandos_dbus_service.ClientRemoved(

2854

client.dbus_object_path, client.name)

2434

mandos_dbus_service.ClientRemoved(client

2435

.dbus_object_path,

2436

client.name)

2855

2437

client_settings.clear()

2856

2438

2857

2439

atexit.register(cleanup)

2868

2450

tcp_server.server_activate()

2869

2451

2870

2452

# Find out what port we got

2871

if zeroconf:

2872

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

2453

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

2873

2454

if use_ipv6:

2874

2455

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

2875

" flowinfo %d, scope_id %d",

2876

*tcp_server.socket.getsockname())

2456

" flowinfo %d, scope_id %d"

2457

% tcp_server.socket.getsockname())

2877

2458

else: # IPv4

2878

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

2879

*tcp_server.socket.getsockname())

2459

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

2460

% tcp_server.socket.getsockname())

2880

2461

2881

2462

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

2882

2463

2883

2464

try:

2884

if zeroconf:

2885

# From the Avahi example code

2886

try:

2887

service.activate()

2888

except dbus.exceptions.DBusException as error:

2889

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

2890

cleanup()

2891

sys.exit(1)

2892

# End of Avahi example code

2465

# From the Avahi example code

2466

try:

2467

service.activate()

2468

except dbus.exceptions.DBusException as error:

2469

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

2470

cleanup()

2471

sys.exit(1)

2472

# End of Avahi example code

2893

2473

2894

2474

gobject.io_add_watch(tcp_server.fileno(), gobject.IO_IN,

2895

2475

lambda *args, **kwargs:

2899

2479

logger.debug("Starting main loop")

2900

2480

main_loop.run()

2901

2481

except AvahiError as error:

2902

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

2482

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

2903

2483

cleanup()

2904

2484

sys.exit(1)

2905

2485

except KeyboardInterrupt:

2910

2490

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

2911

2491

cleanup()

2912

2492

2913

2914

2493

if __name__ == '__main__':

2915

2494

main()