/mandos/release : revision 237.7.468

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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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#

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

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#

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#

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# This program is partly derived from an example program for an Avahi

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# service publisher, downloaded from

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# <http://avahi.org/wiki/PythonPublishExample>. This includes the

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# methods "add", "remove", "server_state_changed",

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# "entry_group_state_changed", "cleanup", and "activate" in the

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

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#

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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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#

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# This file is part of Mandos.

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#

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

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

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# the Free Software Foundation, either version 3 of the License, or

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# (at your option) any later version.

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#

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# This program is distributed in the hope that it will be useful,

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# but WITHOUT ANY WARRANTY; without even the implied warranty of

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# Mandos is distributed in the hope that it will be useful, but

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# WITHOUT ANY WARRANTY; without even the implied warranty of

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# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the

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# GNU General Public License for more details.

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#

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#

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# You should have received a copy of the GNU General Public License

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# along with this program. If not, see

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

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#

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# along with Mandos. If not, see <http://www.gnu.org/licenses/>.

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#

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

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#

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#

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from __future__ import (division, absolute_import, print_function,

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unicode_literals)

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from future_builtins import *

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try:

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from future_builtins import *

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except ImportError:

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pass

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try:

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import SocketServer as socketserver

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import dbus

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import dbus.service

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try:

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import gobject

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except ImportError:

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from gi.repository import GObject as gobject

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import avahi

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from gi.repository import GLib

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from dbus.mainloop.glib import DBusGMainLoop

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import ctypes

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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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# Try to find the value of SO_BINDTODEVICE:

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try:

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# This is where SO_BINDTODEVICE is in Python 3.3 (or 3.4?) and

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# newer, and it is also the most natural place for it:

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SO_BINDTODEVICE = socket.SO_BINDTODEVICE

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except AttributeError:

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try:

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# This is where SO_BINDTODEVICE was up to and including Python

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# 2.6, and also 3.2:

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from IN import SO_BINDTODEVICE

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except ImportError:

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SO_BINDTODEVICE = None

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# In Python 2.7 it seems to have been removed entirely.

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# Try running the C preprocessor:

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try:

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cc = subprocess.Popen(["cc", "--language=c", "-E",

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"/dev/stdin"],

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stdin=subprocess.PIPE,

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stdout=subprocess.PIPE)

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stdout = cc.communicate(

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"#include <sys/socket.h>\nSO_BINDTODEVICE\n")[0]

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SO_BINDTODEVICE = int(stdout.splitlines()[-1])

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except (OSError, ValueError, IndexError):

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# No value found

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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 = "1.7.1"

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version = "1.7.16"

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stored_state_file = "clients.pickle"

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logger = logging.getLogger()

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if_nametoindex = ctypes.cdll.LoadLibrary(

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

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def copy_function(func):

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"""Make a copy of a function"""

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if sys.version_info.major == 2:

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return types.FunctionType(func.func_code,

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func.func_globals,

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func.func_name,

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func.func_defaults,

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func.func_closure)

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else:

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return types.FunctionType(func.__code__,

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func.__globals__,

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func.__name__,

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func.__defaults__,

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func.__closure__)

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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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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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logger.addHandler(syslogger)

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if debug:

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console = logging.StreamHandler()

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

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class PGPEngine(object):

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

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def __init__(self):

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

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self.gpg = "gpg"

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try:

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output = subprocess.check_output(["gpgconf"])

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for line in output.splitlines():

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name, text, path = line.split(b":")

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if name == "gpg":

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self.gpg = path

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break

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except OSError as e:

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if e.errno != errno.ENOENT:

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raise

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self.gnupgargs = ['--batch',

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'--home', self.tempdir,

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'--homedir', self.tempdir,

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'--force-mdc',

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'--quiet',

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'--no-use-agent']

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'--quiet']

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# Only GPG version 1 has the --no-use-agent option.

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if self.gpg == "gpg" or self.gpg.endswith("/gpg"):

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self.gnupgargs.append("--no-use-agent")

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def __enter__(self):

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return self

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

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self._cleanup()

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return False

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def __del__(self):

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self._cleanup()

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def _cleanup(self):

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if self.tempdir is not None:

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# Delete contents of tempdir

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

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topdown = False):

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topdown=False):

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for filename in files:

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

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for dirname in dirs:

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# Remove tempdir

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os.rmdir(self.tempdir)

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self.tempdir = None

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def password_encode(self, password):

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

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

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

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

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return encoded

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def encrypt(self, data, password):

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passphrase = self.password_encode(password)

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with tempfile.NamedTemporaryFile(

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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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proc = subprocess.Popen([self.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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stdin=subprocess.PIPE,

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stdout=subprocess.PIPE,

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stderr=subprocess.PIPE)

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

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if proc.returncode != 0:

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raise PGPError(err)

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return ciphertext

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def decrypt(self, data, password):

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passphrase = self.password_encode(password)

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with tempfile.NamedTemporaryFile(

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dir = self.tempdir) as passfile:

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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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proc = subprocess.Popen([self.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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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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return decrypted_plaintext

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# Pretend that we have an Avahi module

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class Avahi(object):

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"""This isn't so much a class as it is a module-like namespace.

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It is instantiated once, and simulates having an Avahi module."""

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IF_UNSPEC = -1 # avahi-common/address.h

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PROTO_UNSPEC = -1 # avahi-common/address.h

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PROTO_INET = 0 # avahi-common/address.h

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PROTO_INET6 = 1 # avahi-common/address.h

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DBUS_NAME = "org.freedesktop.Avahi"

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DBUS_INTERFACE_ENTRY_GROUP = DBUS_NAME + ".EntryGroup"

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DBUS_INTERFACE_SERVER = DBUS_NAME + ".Server"

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DBUS_PATH_SERVER = "/"

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def string_array_to_txt_array(self, t):

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return dbus.Array((dbus.ByteArray(s.encode("utf-8"))

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for s in t), signature="ay")

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ENTRY_GROUP_ESTABLISHED = 2 # avahi-common/defs.h

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ENTRY_GROUP_COLLISION = 3 # avahi-common/defs.h

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ENTRY_GROUP_FAILURE = 4 # avahi-common/defs.h

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SERVER_INVALID = 0 # avahi-common/defs.h

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SERVER_REGISTERING = 1 # avahi-common/defs.h

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SERVER_RUNNING = 2 # avahi-common/defs.h

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SERVER_COLLISION = 3 # avahi-common/defs.h

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SERVER_FAILURE = 4 # avahi-common/defs.h

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avahi = Avahi()

302

303

231

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class AvahiError(Exception):

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305

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

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self.value = value

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318

246

319

class AvahiService(object):

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"""An Avahi (Zeroconf) service.

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321

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Attributes:

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interface: integer; avahi.IF_UNSPEC or an interface index.

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Used to optionally bind to the specified interface.

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336

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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interface=avahi.IF_UNSPEC,

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name=None,

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servicetype=None,

344

port=None,

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TXT=None,

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domain="",

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host="",

348

max_renames=32768,

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protocol=avahi.PROTO_UNSPEC,

350

bus=None):

278

351

self.interface = interface

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352

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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365

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def rename(self, remove=True):

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

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self.cleanup()

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os._exit(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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397

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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422

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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)

353

426

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if state == avahi.ENTRY_GROUP_ESTABLISHED:

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logger.debug("Zeroconf service established.")

356

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elif state == avahi.ENTRY_GROUP_COLLISION:

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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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436

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def cleanup(self):

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

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439

if self.group is not None:

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pass

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self.group = None

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446

self.remove()

374

447

375

448

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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479

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"""

412

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if self.server is None:

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496

class AvahiServiceToSyslog(AvahiService):

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

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

426

ret = AvahiService.rename(self, *args, **kwargs)

499

ret = super(AvahiServiceToSyslog, self).rename(self, *args,

500

**kwargs)

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syslogger.setFormatter(logging.Formatter(

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

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503

.format(self.name)))

430

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return ret

431

505

506

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507

# Pretend that we have a GnuTLS module

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class GnuTLS(object):

434

509

"""This isn't so much a class as it is a module-like namespace.

435

510

It is instantiated once, and simulates having a GnuTLS module."""

436

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_library = ctypes.cdll.LoadLibrary(

438

ctypes.util.find_library("gnutls"))

439

_need_version = "3.3.0"

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library = ctypes.util.find_library("gnutls")

513

if library is None:

514

library = ctypes.util.find_library("gnutls-deb0")

515

_library = ctypes.cdll.LoadLibrary(library)

516

del library

517

_need_version = b"3.3.0"

518

440

519

def __init__(self):

441

# Need to use class name "GnuTLS" here, since this method is

442

# called before the assignment to the "gnutls" global variable

443

# happens.

444

if GnuTLS.check_version(self._need_version) is None:

445

raise GnuTLS.Error("Needs GnuTLS {} or later"

446

.format(self._need_version))

447

520

# Need to use "self" here, since this method is called before

521

# the assignment to the "gnutls" global variable happens.

522

if self.check_version(self._need_version) is None:

523

raise self.Error("Needs GnuTLS {} or later"

524

.format(self._need_version))

525

448

526

# Unless otherwise indicated, the constants and types below are

449

527

# all from the gnutls/gnutls.h C header file.

450

528

451

529

# Constants

452

530

E_SUCCESS = 0

531

E_INTERRUPTED = -52

532

E_AGAIN = -28

453

533

CRT_OPENPGP = 2

454

534

CLIENT = 2

455

535

SHUT_RDWR = 0

456

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CRD_CERTIFICATE = 1

457

537

E_NO_CERTIFICATE_FOUND = -49

458

538

OPENPGP_FMT_RAW = 0 # gnutls/openpgp.h

459

539

460

540

# Types

461

541

class session_int(ctypes.Structure):

462

542

_fields_ = []

463

543

session_t = ctypes.POINTER(session_int)

544

464

545

class certificate_credentials_st(ctypes.Structure):

465

546

_fields_ = []

466

547

certificate_credentials_t = ctypes.POINTER(

467

548

certificate_credentials_st)

468

549

certificate_type_t = ctypes.c_int

550

469

551

class datum_t(ctypes.Structure):

470

552

_fields_ = [('data', ctypes.POINTER(ctypes.c_ubyte)),

471

553

('size', ctypes.c_uint)]

554

472

555

class openpgp_crt_int(ctypes.Structure):

473

556

_fields_ = []

474

557

openpgp_crt_t = ctypes.POINTER(openpgp_crt_int)

475

openpgp_crt_fmt_t = ctypes.c_int # gnutls/openpgp.h

558

openpgp_crt_fmt_t = ctypes.c_int # gnutls/openpgp.h

476

559

log_func = ctypes.CFUNCTYPE(None, ctypes.c_int, ctypes.c_char_p)

477

credentials_type_t = ctypes.c_int #

560

credentials_type_t = ctypes.c_int

478

561

transport_ptr_t = ctypes.c_void_p

479

562

close_request_t = ctypes.c_int

480

563

481

564

# Exceptions

482

565

class Error(Exception):

483

566

# We need to use the class name "GnuTLS" here, since this

484

567

# exception might be raised from within GnuTLS.__init__,

485

568

# which is called before the assignment to the "gnutls"

486

# global variable happens.

487

def __init__(self, message = None, code = None, args=()):

569

# global variable has happened.

570

def __init__(self, message=None, code=None, args=()):

488

571

# Default usage is by a message string, but if a return

489

572

# code is passed, convert it to a string with

490

573

# gnutls.strerror()

574

self.code = code

491

575

if message is None and code is not None:

492

576

message = GnuTLS.strerror(code)

493

577

return super(GnuTLS.Error, self).__init__(

494

578

message, *args)

495

579

496

580

class CertificateSecurityError(Error):

497

581

pass

498

582

499

583

# Classes

500

584

class Credentials(object):

501

585

def __init__(self):

503

587

gnutls.certificate_allocate_credentials(

504

588

ctypes.byref(self._c_object))

505

589

self.type = gnutls.CRD_CERTIFICATE

506

590

507

591

def __del__(self):

508

592

gnutls.certificate_free_credentials(self._c_object)

509

593

510

594

class ClientSession(object):

511

def __init__(self, socket, credentials = None):

595

def __init__(self, socket, credentials=None):

512

596

self._c_object = gnutls.session_t()

513

597

gnutls.init(ctypes.byref(self._c_object), gnutls.CLIENT)

514

598

gnutls.set_default_priority(self._c_object)

522

606

ctypes.cast(credentials._c_object,

523

607

ctypes.c_void_p))

524

608

self.credentials = credentials

525

609

526

610

def __del__(self):

527

611

gnutls.deinit(self._c_object)

528

612

529

613

def handshake(self):

530

614

return gnutls.handshake(self._c_object)

531

615

532

616

def send(self, data):

533

617

data = bytes(data)

534

if not data:

535

return 0

536

return gnutls.record_send(self._c_object, data, len(data))

537

618

data_len = len(data)

619

while data_len > 0:

620

data_len -= gnutls.record_send(self._c_object,

621

data[-data_len:],

622

data_len)

623

538

624

def bye(self):

539

625

return gnutls.bye(self._c_object, gnutls.SHUT_RDWR)

540

541

# Error handling function

626

627

# Error handling functions

542

628

def _error_code(result):

543

629

"""A function to raise exceptions on errors, suitable

544

630

for the 'restype' attribute on ctypes functions"""

545

631

if result >= 0:

546

632

return result

547

633

if result == gnutls.E_NO_CERTIFICATE_FOUND:

548

raise gnutls.CertificateSecurityError(code = result)

549

raise gnutls.Error(code = result)

550

634

raise gnutls.CertificateSecurityError(code=result)

635

raise gnutls.Error(code=result)

636

637

def _retry_on_error(result, func, arguments):

638

"""A function to retry on some errors, suitable

639

for the 'errcheck' attribute on ctypes functions"""

640

while result < 0:

641

if result not in (gnutls.E_INTERRUPTED, gnutls.E_AGAIN):

642

return _error_code(result)

643

result = func(*arguments)

644

return result

645

551

646

# Unless otherwise indicated, the function declarations below are

552

647

# all from the gnutls/gnutls.h C header file.

553

648

554

649

# Functions

555

650

priority_set_direct = _library.gnutls_priority_set_direct

556

651

priority_set_direct.argtypes = [session_t, ctypes.c_char_p,

557

652

ctypes.POINTER(ctypes.c_char_p)]

558

653

priority_set_direct.restype = _error_code

559

654

560

655

init = _library.gnutls_init

561

656

init.argtypes = [ctypes.POINTER(session_t), ctypes.c_int]

562

657

init.restype = _error_code

563

658

564

659

set_default_priority = _library.gnutls_set_default_priority

565

660

set_default_priority.argtypes = [session_t]

566

661

set_default_priority.restype = _error_code

567

662

568

663

record_send = _library.gnutls_record_send

569

664

record_send.argtypes = [session_t, ctypes.c_void_p,

570

665

ctypes.c_size_t]

571

666

record_send.restype = ctypes.c_ssize_t

572

667

record_send.errcheck = _retry_on_error

668

573

669

certificate_allocate_credentials = (

574

670

_library.gnutls_certificate_allocate_credentials)

575

671

certificate_allocate_credentials.argtypes = [

576

672

ctypes.POINTER(certificate_credentials_t)]

577

673

certificate_allocate_credentials.restype = _error_code

578

674

579

675

certificate_free_credentials = (

580

676

_library.gnutls_certificate_free_credentials)

581

certificate_free_credentials.argtypes = [certificate_credentials_t]

677

certificate_free_credentials.argtypes = [

678

certificate_credentials_t]

582

679

certificate_free_credentials.restype = None

583

680

584

681

handshake_set_private_extensions = (

585

682

_library.gnutls_handshake_set_private_extensions)

586

683

handshake_set_private_extensions.argtypes = [session_t,

587

684

ctypes.c_int]

588

685

handshake_set_private_extensions.restype = None

589

686

590

687

credentials_set = _library.gnutls_credentials_set

591

688

credentials_set.argtypes = [session_t, credentials_type_t,

592

689

ctypes.c_void_p]

593

690

credentials_set.restype = _error_code

594

691

595

692

strerror = _library.gnutls_strerror

596

693

strerror.argtypes = [ctypes.c_int]

597

694

strerror.restype = ctypes.c_char_p

598

695

599

696

certificate_type_get = _library.gnutls_certificate_type_get

600

697

certificate_type_get.argtypes = [session_t]

601

698

certificate_type_get.restype = _error_code

602

699

603

700

certificate_get_peers = _library.gnutls_certificate_get_peers

604

701

certificate_get_peers.argtypes = [session_t,

605

702

ctypes.POINTER(ctypes.c_uint)]

606

703

certificate_get_peers.restype = ctypes.POINTER(datum_t)

607

704

608

705

global_set_log_level = _library.gnutls_global_set_log_level

609

706

global_set_log_level.argtypes = [ctypes.c_int]

610

707

global_set_log_level.restype = None

611

708

612

709

global_set_log_function = _library.gnutls_global_set_log_function

613

710

global_set_log_function.argtypes = [log_func]

614

711

global_set_log_function.restype = None

615

712

616

713

deinit = _library.gnutls_deinit

617

714

deinit.argtypes = [session_t]

618

715

deinit.restype = None

619

716

620

717

handshake = _library.gnutls_handshake

621

718

handshake.argtypes = [session_t]

622

719

handshake.restype = _error_code

623

720

handshake.errcheck = _retry_on_error

721

624

722

transport_set_ptr = _library.gnutls_transport_set_ptr

625

723

transport_set_ptr.argtypes = [session_t, transport_ptr_t]

626

724

transport_set_ptr.restype = None

627

725

628

726

bye = _library.gnutls_bye

629

727

bye.argtypes = [session_t, close_request_t]

630

728

bye.restype = _error_code

631

729

bye.errcheck = _retry_on_error

730

632

731

check_version = _library.gnutls_check_version

633

732

check_version.argtypes = [ctypes.c_char_p]

634

733

check_version.restype = ctypes.c_char_p

635

734

636

735

# All the function declarations below are from gnutls/openpgp.h

637

736

638

737

openpgp_crt_init = _library.gnutls_openpgp_crt_init

639

738

openpgp_crt_init.argtypes = [ctypes.POINTER(openpgp_crt_t)]

640

739

openpgp_crt_init.restype = _error_code

641

740

642

741

openpgp_crt_import = _library.gnutls_openpgp_crt_import

643

742

openpgp_crt_import.argtypes = [openpgp_crt_t,

644

743

ctypes.POINTER(datum_t),

645

744

openpgp_crt_fmt_t]

646

745

openpgp_crt_import.restype = _error_code

647

746

648

747

openpgp_crt_verify_self = _library.gnutls_openpgp_crt_verify_self

649

748

openpgp_crt_verify_self.argtypes = [openpgp_crt_t, ctypes.c_uint,

650

749

ctypes.POINTER(ctypes.c_uint)]

651

750

openpgp_crt_verify_self.restype = _error_code

652

751

653

752

openpgp_crt_deinit = _library.gnutls_openpgp_crt_deinit

654

753

openpgp_crt_deinit.argtypes = [openpgp_crt_t]

655

754

openpgp_crt_deinit.restype = None

656

755

657

756

openpgp_crt_get_fingerprint = (

658

757

_library.gnutls_openpgp_crt_get_fingerprint)

659

758

openpgp_crt_get_fingerprint.argtypes = [openpgp_crt_t,

661

760

ctypes.POINTER(

662

761

ctypes.c_size_t)]

663

762

openpgp_crt_get_fingerprint.restype = _error_code

664

665

# Remove non-public function

666

del _error_code

763

764

# Remove non-public functions

765

del _error_code, _retry_on_error

667

766

# Create the global "gnutls" object, simulating a module

668

767

gnutls = GnuTLS()

669

768

769

670

770

def call_pipe(connection, # : multiprocessing.Connection

671

771

func, *args, **kwargs):

672

772

"""This function is meant to be called by multiprocessing.Process

673

773

674

774

This function runs func(*args, **kwargs), and writes the resulting

675

775

return value on the provided multiprocessing.Connection.

676

776

"""

677

777

connection.send(func(*args, **kwargs))

678

778

connection.close()

679

779

780

680

781

class Client(object):

681

782

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

682

783

683

784

Attributes:

684

785

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

685

786

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

687

788

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

688

789

to see if the client lives.

689

790

'None' if no process is running.

690

checker_callback_tag: a gobject event source tag, or None

791

checker_callback_tag: a GLib event source tag, or None

691

792

checker_command: string; External command which is run to check

692

793

if client lives. %() expansions are done at

693

794

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

694

795

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

695

checker_initiator_tag: a gobject event source tag, or None

796

checker_initiator_tag: a GLib event source tag, or None

696

797

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

697

798

client_structure: Object describing what attributes a client has

698

799

and is used for storing the client at exit

699

800

current_checker_command: string; current running checker_command

700

disable_initiator_tag: a gobject event source tag, or None

801

disable_initiator_tag: a GLib event source tag, or None

701

802

enabled: bool()

702

803

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

703

804

uniquely identify the client

722

823

disabled, or None

723

824

server_settings: The server_settings dict from main()

724

825

"""

725

826

726

827

runtime_expansions = ("approval_delay", "approval_duration",

727

828

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

728

829

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

739

840

"approved_by_default": "True",

740

841

"enabled": "True",

741

842

}

742

843

743

844

@staticmethod

744

845

def config_parser(config):

745

846

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

752

853

for client_name in config.sections():

753

854

section = dict(config.items(client_name))

754

855

client = settings[client_name] = {}

755

856

756

857

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

757

858

# Reformat values from string types to Python types

758

859

client["approved_by_default"] = config.getboolean(

759

860

client_name, "approved_by_default")

760

861

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

761

862

"enabled")

762

863

763

864

# Uppercase and remove spaces from fingerprint for later

764

865

# comparison purposes with return value from the

765

866

# fingerprint() function

766

867

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

767

868

.replace(" ", ""))

768

869

if "secret" in section:

769

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

870

client["secret"] = codecs.decode(section["secret"]

871

.encode("utf-8"),

872

"base64")

770

873

elif "secfile" in section:

771

874

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

772

875

(section["secfile"])),

787

890

client["last_approval_request"] = None

788

891

client["last_checked_ok"] = None

789

892

client["last_checker_status"] = -2

790

893

791

894

return settings

792

793

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

895

896

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

794

897

self.name = name

795

898

if server_settings is None:

796

899

server_settings = {}

798

901

# adding all client settings

799

902

for setting, value in settings.items():

800

903

setattr(self, setting, value)

801

904

802

905

if self.enabled:

803

906

if not hasattr(self, "last_enabled"):

804

907

self.last_enabled = datetime.datetime.utcnow()

808

911

else:

809

912

self.last_enabled = None

810

913

self.expires = None

811

914

812

915

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

813

916

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

814

917

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

815

918

datetime.datetime.utcnow())

816

919

817

920

# attributes specific for this server instance

818

921

self.checker = None

819

922

self.checker_initiator_tag = None

825

928

self.changedstate = multiprocessing_manager.Condition(

826

929

multiprocessing_manager.Lock())

827

930

self.client_structure = [attr

828

for attr in self.__dict__.iterkeys()

931

for attr in self.__dict__.keys()

829

932

if not attr.startswith("_")]

830

933

self.client_structure.append("client_structure")

831

934

832

935

for name, t in inspect.getmembers(

833

936

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

834

937

if not name.startswith("_"):

835

938

self.client_structure.append(name)

836

939

837

940

# Send notice to process children that client state has changed

838

941

def send_changedstate(self):

839

942

with self.changedstate:

840

943

self.changedstate.notify_all()

841

944

842

945

def enable(self):

843

946

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

844

947

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

849

952

self.last_enabled = datetime.datetime.utcnow()

850

953

self.init_checker()

851

954

self.send_changedstate()

852

955

853

956

def disable(self, quiet=True):

854

957

"""Disable this client."""

855

958

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

857

960

if not quiet:

858

961

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

859

962

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

860

gobject.source_remove(self.disable_initiator_tag)

963

GLib.source_remove(self.disable_initiator_tag)

861

964

self.disable_initiator_tag = None

862

965

self.expires = None

863

966

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

864

gobject.source_remove(self.checker_initiator_tag)

967

GLib.source_remove(self.checker_initiator_tag)

865

968

self.checker_initiator_tag = None

866

969

self.stop_checker()

867

970

self.enabled = False

868

971

if not quiet:

869

972

self.send_changedstate()

870

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

973

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

871

974

return False

872

975

873

976

def __del__(self):

874

977

self.disable()

875

978

876

979

def init_checker(self):

877

980

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

878

981

# and every interval from then on.

879

982

if self.checker_initiator_tag is not None:

880

gobject.source_remove(self.checker_initiator_tag)

881

self.checker_initiator_tag = gobject.timeout_add(

983

GLib.source_remove(self.checker_initiator_tag)

984

self.checker_initiator_tag = GLib.timeout_add(

882

985

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

883

986

self.start_checker)

884

987

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

885

988

if self.disable_initiator_tag is not None:

886

gobject.source_remove(self.disable_initiator_tag)

887

self.disable_initiator_tag = gobject.timeout_add(

989

GLib.source_remove(self.disable_initiator_tag)

990

self.disable_initiator_tag = GLib.timeout_add(

888

991

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

889

992

# Also start a new checker *right now*.

890

993

self.start_checker()

891

994

892

995

def checker_callback(self, source, condition, connection,

893

996

command):

894

997

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

897

1000

# Read return code from connection (see call_pipe)

898

1001

returncode = connection.recv()

899

1002

connection.close()

900

1003

901

1004

if returncode >= 0:

902

1005

self.last_checker_status = returncode

903

1006

self.last_checker_signal = None

913

1016

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

914

1017

vars(self))

915

1018

return False

916

1019

917

1020

def checked_ok(self):

918

1021

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

919

1022

self.last_checked_ok = datetime.datetime.utcnow()

920

1023

self.last_checker_status = 0

921

1024

self.last_checker_signal = None

922

1025

self.bump_timeout()

923

1026

924

1027

def bump_timeout(self, timeout=None):

925

1028

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

926

1029

if timeout is None:

927

1030

timeout = self.timeout

928

1031

if self.disable_initiator_tag is not None:

929

gobject.source_remove(self.disable_initiator_tag)

1032

GLib.source_remove(self.disable_initiator_tag)

930

1033

self.disable_initiator_tag = None

931

1034

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

932

self.disable_initiator_tag = gobject.timeout_add(

1035

self.disable_initiator_tag = GLib.timeout_add(

933

1036

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

934

1037

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

935

1038

936

1039

def need_approval(self):

937

1040

self.last_approval_request = datetime.datetime.utcnow()

938

1041

939

1042

def start_checker(self):

940

1043

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

941

1044

942

1045

If a checker already exists, leave it running and do

943

1046

nothing."""

944

1047

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

949

1052

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

950

1053

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

951

1054

# should be.

952

1055

953

1056

if self.checker is not None and not self.checker.is_alive():

954

1057

logger.warning("Checker was not alive; joining")

955

1058

self.checker.join()

959

1062

# Escape attributes for the shell

960

1063

escaped_attrs = {

961

1064

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

962

for attr in self.runtime_expansions }

1065

for attr in self.runtime_expansions}

963

1066

try:

964

1067

command = self.checker_command % escaped_attrs

965

1068

except TypeError as error:

977

1080

# The exception is when not debugging but nevertheless

978

1081

# running in the foreground; use the previously

979

1082

# created wnull.

980

popen_args = { "close_fds": True,

981

"shell": True,

982

"cwd": "/" }

1083

popen_args = {"close_fds": True,

1084

"shell": True,

1085

"cwd": "/"}

983

1086

if (not self.server_settings["debug"]

984

1087

and self.server_settings["foreground"]):

985

1088

popen_args.update({"stdout": wnull,

986

"stderr": wnull })

987

pipe = multiprocessing.Pipe(duplex = False)

1089

"stderr": wnull})

1090

pipe = multiprocessing.Pipe(duplex=False)

988

1091

self.checker = multiprocessing.Process(

989

target = call_pipe,

990

args = (pipe[1], subprocess.call, command),

991

kwargs = popen_args)

1092

target=call_pipe,

1093

args=(pipe[1], subprocess.call, command),

1094

kwargs=popen_args)

992

1095

self.checker.start()

993

self.checker_callback_tag = gobject.io_add_watch(

994

pipe[0].fileno(), gobject.IO_IN,

1096

self.checker_callback_tag = GLib.io_add_watch(

1097

pipe[0].fileno(), GLib.IO_IN,

995

1098

self.checker_callback, pipe[0], command)

996

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

1099

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

997

1100

return True

998

1101

999

1102

def stop_checker(self):

1000

1103

"""Force the checker process, if any, to stop."""

1001

1104

if self.checker_callback_tag:

1002

gobject.source_remove(self.checker_callback_tag)

1105

GLib.source_remove(self.checker_callback_tag)

1003

1106

self.checker_callback_tag = None

1004

1107

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

1005

1108

return

1014

1117

byte_arrays=False):

1015

1118

"""Decorators for marking methods of a DBusObjectWithProperties to

1016

1119

become properties on the D-Bus.

1017

1120

1018

1121

The decorated method will be called with no arguments by "Get"

1019

1122

and with one argument by "Set".

1020

1123

1021

1124

The parameters, where they are supported, are the same as

1022

1125

dbus.service.method, except there is only "signature", since the

1023

1126

type from Get() and the type sent to Set() is the same.

1027

1130

if byte_arrays and signature != "ay":

1028

1131

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

1029

1132

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

1030

1133

1031

1134

def decorator(func):

1032

1135

func._dbus_is_property = True

1033

1136

func._dbus_interface = dbus_interface

1036

1139

func._dbus_name = func.__name__

1037

1140

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

1038

1141

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

1039

func._dbus_get_args_options = {'byte_arrays': byte_arrays }

1142

func._dbus_get_args_options = {'byte_arrays': byte_arrays}

1040

1143

return func

1041

1144

1042

1145

return decorator

1043

1146

1044

1147

1045

1148

def dbus_interface_annotations(dbus_interface):

1046

1149

"""Decorator for marking functions returning interface annotations

1047

1150

1048

1151

Usage:

1049

1152

1050

1153

@dbus_interface_annotations("org.example.Interface")

1051

1154

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

1052

1155

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

1053

1156

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

1054

1157

"false"}

1055

1158

"""

1056

1159

1057

1160

def decorator(func):

1058

1161

func._dbus_is_interface = True

1059

1162

func._dbus_interface = dbus_interface

1060

1163

func._dbus_name = dbus_interface

1061

1164

return func

1062

1165

1063

1166

return decorator

1064

1167

1065

1168

1066

1169

def dbus_annotations(annotations):

1067

1170

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

1068

1171

Usage:

1069

1172

1070

1173

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

1071

1174

"org.freedesktop.DBus.Property."

1072

1175

"EmitsChangedSignal": "false"})

1074

1177

access="r")

1075

1178

def Property_dbus_property(self):

1076

1179

return dbus.Boolean(False)

1077

1180

1078

1181

See also the DBusObjectWithAnnotations class.

1079

1182

"""

1080

1183

1081

1184

def decorator(func):

1082

1185

func._dbus_annotations = annotations

1083

1186

return func

1084

1187

1085

1188

return decorator

1086

1189

1087

1190

1105

1208

1106

1209

class DBusObjectWithAnnotations(dbus.service.Object):

1107

1210

"""A D-Bus object with annotations.

1108

1211

1109

1212

Classes inheriting from this can use the dbus_annotations

1110

1213

decorator to add annotations to methods or signals.

1111

1214

"""

1112

1215

1113

1216

@staticmethod

1114

1217

def _is_dbus_thing(thing):

1115

1218

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

1116

1219

1117

1220

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

1118

1221

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

1119

1222

"""

1120

1223

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

1121

1224

False)

1122

1225

1123

1226

def _get_all_dbus_things(self, thing):

1124

1227

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

1125

1228

"""

1128

1231

for cls in self.__class__.__mro__

1129

1232

for name, athing in

1130

1233

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

1131

1234

1132

1235

@dbus.service.method(dbus.INTROSPECTABLE_IFACE,

1133

out_signature = "s",

1134

path_keyword = 'object_path',

1135

connection_keyword = 'connection')

1236

out_signature="s",

1237

path_keyword='object_path',

1238

connection_keyword='connection')

1136

1239

def Introspect(self, object_path, connection):

1137

1240

"""Overloading of standard D-Bus method.

1138

1241

1139

1242

Inserts annotation tags on methods and signals.

1140

1243

"""

1141

1244

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

1142

1245

connection)

1143

1246

try:

1144

1247

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

1145

1248

1146

1249

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

1147

1250

# Add annotation tags

1148

1251

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

1175

1278

if_tag.appendChild(ann_tag)

1176

1279

# Fix argument name for the Introspect method itself

1177

1280

if (if_tag.getAttribute("name")

1178

== dbus.INTROSPECTABLE_IFACE):

1281

== dbus.INTROSPECTABLE_IFACE):

1179

1282

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

1180

1283

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

1181

1284

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

1194

1297

1195

1298

class DBusObjectWithProperties(DBusObjectWithAnnotations):

1196

1299

"""A D-Bus object with properties.

1197

1300

1198

1301

Classes inheriting from this can use the dbus_service_property

1199

1302

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

1200

1303

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

1201

1304

"""

1202

1305

1203

1306

def _get_dbus_property(self, interface_name, property_name):

1204

1307

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

1205

1308

property with the specified name and interface.

1210

1313

if (value._dbus_name == property_name

1211

1314

and value._dbus_interface == interface_name):

1212

1315

return value.__get__(self)

1213

1316

1214

1317

# No such property

1215

1318

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

1216

1319

self.dbus_object_path, interface_name, property_name))

1217

1320

1218

1321

@classmethod

1219

1322

def _get_all_interface_names(cls):

1220

1323

"""Get a sequence of all interfaces supported by an object"""

1223

1326

for x in (inspect.getmro(cls))

1224

1327

for attr in dir(x))

1225

1328

if name is not None)

1226

1329

1227

1330

@dbus.service.method(dbus.PROPERTIES_IFACE,

1228

1331

in_signature="ss",

1229

1332

out_signature="v")

1237

1340

if not hasattr(value, "variant_level"):

1238

1341

return value

1239

1342

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

1240

1343

1241

1344

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

1242

1345

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

1243

1346

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

1255

1358

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

1256

1359

for byte in value))

1257

1360

prop(value)

1258

1361

1259

1362

@dbus.service.method(dbus.PROPERTIES_IFACE,

1260

1363

in_signature="s",

1261

1364

out_signature="a{sv}")

1262

1365

def GetAll(self, interface_name):

1263

1366

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

1264

1367

standard.

1265

1368

1266

1369

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

1267

1370

"""

1268

1371

properties = {}

1279

1382

properties[name] = value

1280

1383

continue

1281

1384

properties[name] = type(value)(

1282

value, variant_level = value.variant_level + 1)

1385

value, variant_level=value.variant_level + 1)

1283

1386

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

1284

1387

1285

1388

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

1286

1389

def PropertiesChanged(self, interface_name, changed_properties,

1287

1390

invalidated_properties):

1289

1392

standard.

1290

1393

"""

1291

1394

pass

1292

1395

1293

1396

@dbus.service.method(dbus.INTROSPECTABLE_IFACE,

1294

1397

out_signature="s",

1295

1398

path_keyword='object_path',

1296

1399

connection_keyword='connection')

1297

1400

def Introspect(self, object_path, connection):

1298

1401

"""Overloading of standard D-Bus method.

1299

1402

1300

1403

Inserts property tags and interface annotation tags.

1301

1404

"""

1302

1405

xmlstring = DBusObjectWithAnnotations.Introspect(self,

1304

1407

connection)

1305

1408

try:

1306

1409

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

1307

1410

1308

1411

def make_tag(document, name, prop):

1309

1412

e = document.createElement("property")

1310

1413

e.setAttribute("name", name)

1311

1414

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

1312

1415

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

1313

1416

return e

1314

1417

1315

1418

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

1316

1419

# Add property tags

1317

1420

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

1359

1462

exc_info=error)

1360

1463

return xmlstring

1361

1464

1465

1362

1466

try:

1363

1467

dbus.OBJECT_MANAGER_IFACE

1364

1468

except AttributeError:

1365

1469

dbus.OBJECT_MANAGER_IFACE = "org.freedesktop.DBus.ObjectManager"

1366

1470

1471

1367

1472

class DBusObjectWithObjectManager(DBusObjectWithAnnotations):

1368

1473

"""A D-Bus object with an ObjectManager.

1369

1474

1370

1475

Classes inheriting from this exposes the standard

1371

1476

GetManagedObjects call and the InterfacesAdded and

1372

1477

InterfacesRemoved signals on the standard

1373

1478

"org.freedesktop.DBus.ObjectManager" interface.

1374

1479

1375

1480

Note: No signals are sent automatically; they must be sent

1376

1481

manually.

1377

1482

"""

1378

1483

@dbus.service.method(dbus.OBJECT_MANAGER_IFACE,

1379

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

1484

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

1380

1485

def GetManagedObjects(self):

1381

1486

"""This function must be overridden"""

1382

1487

raise NotImplementedError()

1383

1488

1384

1489

@dbus.service.signal(dbus.OBJECT_MANAGER_IFACE,

1385

signature = "oa{sa{sv}}")

1490

signature="oa{sa{sv}}")

1386

1491

def InterfacesAdded(self, object_path, interfaces_and_properties):

1387

1492

pass

1388

1389

@dbus.service.signal(dbus.OBJECT_MANAGER_IFACE, signature = "oas")

1493

1494

@dbus.service.signal(dbus.OBJECT_MANAGER_IFACE, signature="oas")

1390

1495

def InterfacesRemoved(self, object_path, interfaces):

1391

1496

pass

1392

1497

1393

1498

@dbus.service.method(dbus.INTROSPECTABLE_IFACE,

1394

out_signature = "s",

1395

path_keyword = 'object_path',

1396

connection_keyword = 'connection')

1499

out_signature="s",

1500

path_keyword='object_path',

1501

connection_keyword='connection')

1397

1502

def Introspect(self, object_path, connection):

1398

1503

"""Overloading of standard D-Bus method.

1399

1504

1400

1505

Override return argument name of GetManagedObjects to be

1401

1506

"objpath_interfaces_and_properties"

1402

1507

"""

1405

1510

connection)

1406

1511

try:

1407

1512

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

1408

1513

1409

1514

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

1410

1515

# Fix argument name for the GetManagedObjects method

1411

1516

if (if_tag.getAttribute("name")

1412

== dbus.OBJECT_MANAGER_IFACE):

1517

== dbus.OBJECT_MANAGER_IFACE):

1413

1518

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

1414

1519

if (cn.getAttribute("name")

1415

1520

== "GetManagedObjects"):

1425

1530

except (AttributeError, xml.dom.DOMException,

1426

1531

xml.parsers.expat.ExpatError) as error:

1427

1532

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

1428

exc_info = error)

1533

exc_info=error)

1429

1534

return xmlstring

1430

1535

1536

1431

1537

def datetime_to_dbus(dt, variant_level=0):

1432

1538

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

1433

1539

if dt is None:

1434

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

1540

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

1435

1541

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

1436

1542

1437

1543

1440

1546

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

1441

1547

interface names according to the "alt_interface_names" mapping.

1442

1548

Usage:

1443

1549

1444

1550

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

1445

1551

"net.example.AlternateInterface"})

1446

1552

class SampleDBusObject(dbus.service.Object):

1447

1553

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

1448

1554

def SampleDBusMethod():

1449

1555

pass

1450

1556

1451

1557

The above "SampleDBusMethod" on "SampleDBusObject" will be

1452

1558

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

1453

1559

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

1454

1560

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

1455

1561

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

1456

1562

1457

1563

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

1458

1564

(from DBusObjectWithProperties) and interfaces (from the

1459

1565

dbus_interface_annotations decorator).

1460

1566

"""

1461

1567

1462

1568

def wrapper(cls):

1463

1569

for orig_interface_name, alt_interface_name in (

1464

1570

alt_interface_names.items()):

1479

1585

interface_names.add(alt_interface)

1480

1586

# Is this a D-Bus signal?

1481

1587

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

1588

# Extract the original non-method undecorated

1589

# function by black magic

1482

1590

if sys.version_info.major == 2:

1483

# Extract the original non-method undecorated

1484

# function by black magic

1485

1591

nonmethod_func = (dict(

1486

1592

zip(attribute.func_code.co_freevars,

1487

1593

attribute.__closure__))

1488

1594

["func"].cell_contents)

1489

1595

else:

1490

nonmethod_func = attribute

1596

nonmethod_func = (dict(

1597

zip(attribute.__code__.co_freevars,

1598

attribute.__closure__))

1599

["func"].cell_contents)

1491

1600

# Create a new, but exactly alike, function

1492

1601

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

1493

1602

# with the alternate D-Bus interface name

1494

if sys.version_info.major == 2:

1495

new_function = types.FunctionType(

1496

nonmethod_func.func_code,

1497

nonmethod_func.func_globals,

1498

nonmethod_func.func_name,

1499

nonmethod_func.func_defaults,

1500

nonmethod_func.func_closure)

1501

else:

1502

new_function = types.FunctionType(

1503

nonmethod_func.__code__,

1504

nonmethod_func.__globals__,

1505

nonmethod_func.__name__,

1506

nonmethod_func.__defaults__,

1507

nonmethod_func.__closure__)

1603

new_function = copy_function(nonmethod_func)

1508

1604

new_function = (dbus.service.signal(

1509

1605

alt_interface,

1510

1606

attribute._dbus_signature)(new_function))

1514

1610

attribute._dbus_annotations)

1515

1611

except AttributeError:

1516

1612

pass

1613

1517

1614

# Define a creator of a function to call both the

1518

1615

# original and alternate functions, so both the

1519

1616

# original and alternate signals gets sent when

1522

1619

"""This function is a scope container to pass

1523

1620

func1 and func2 to the "call_both" function

1524

1621

outside of its arguments"""

1525

1622

1526

1623

@functools.wraps(func2)

1527

1624

def call_both(*args, **kwargs):

1528

1625

"""This function will emit two D-Bus

1529

1626

signals by calling func1 and func2"""

1530

1627

func1(*args, **kwargs)

1531

1628

func2(*args, **kwargs)

1532

# Make wrapper function look like a D-Bus signal

1629

# Make wrapper function look like a D-Bus

1630

# signal

1533

1631

for name, attr in inspect.getmembers(func2):

1534

1632

if name.startswith("_dbus_"):

1535

1633

setattr(call_both, name, attr)

1536

1634

1537

1635

return call_both

1538

1636

# Create the "call_both" function and add it to

1539

1637

# the class

1549

1647

alt_interface,

1550

1648

attribute._dbus_in_signature,

1551

1649

attribute._dbus_out_signature)

1552

(types.FunctionType(attribute.func_code,

1553

attribute.func_globals,

1554

attribute.func_name,

1555

attribute.func_defaults,

1556

attribute.func_closure)))

1650

(copy_function(attribute)))

1557

1651

# Copy annotations, if any

1558

1652

try:

1559

1653

attr[attrname]._dbus_annotations = dict(

1571

1665

attribute._dbus_access,

1572

1666

attribute._dbus_get_args_options

1573

1667

["byte_arrays"])

1574

(types.FunctionType(

1575

attribute.func_code,

1576

attribute.func_globals,

1577

attribute.func_name,

1578

attribute.func_defaults,

1579

attribute.func_closure)))

1668

(copy_function(attribute)))

1580

1669

# Copy annotations, if any

1581

1670

try:

1582

1671

attr[attrname]._dbus_annotations = dict(

1591

1680

# to the class.

1592

1681

attr[attrname] = (

1593

1682

dbus_interface_annotations(alt_interface)

1594

(types.FunctionType(attribute.func_code,

1595

attribute.func_globals,

1596

attribute.func_name,

1597

attribute.func_defaults,

1598

attribute.func_closure)))

1683

(copy_function(attribute)))

1599

1684

if deprecate:

1600

1685

# Deprecate all alternate interfaces

1601

iname="_AlternateDBusNames_interface_annotation{}"

1686

iname = "_AlternateDBusNames_interface_annotation{}"

1602

1687

for interface_name in interface_names:

1603

1688

1604

1689

@dbus_interface_annotations(interface_name)

1605

1690

def func(self):

1606

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

1607

"true" }

1691

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

1692

"true"}

1608

1693

# Find an unused name

1609

1694

for aname in (iname.format(i)

1610

1695

for i in itertools.count()):

1614

1699

if interface_names:

1615

1700

# Replace the class with a new subclass of it with

1616

1701

# methods, signals, etc. as created above.

1617

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

1618

(cls, ), attr)

1702

if sys.version_info.major == 2:

1703

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

1704

(cls, ), attr)

1705

else:

1706

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

1707

(cls, ), attr)

1619

1708

return cls

1620

1709

1621

1710

return wrapper

1622

1711

1623

1712

1625

1714

"se.bsnet.fukt.Mandos"})

1626

1715

class ClientDBus(Client, DBusObjectWithProperties):

1627

1716

"""A Client class using D-Bus

1628

1717

1629

1718

Attributes:

1630

1719

dbus_object_path: dbus.ObjectPath

1631

1720

bus: dbus.SystemBus()

1632

1721

"""

1633

1722

1634

1723

runtime_expansions = (Client.runtime_expansions

1635

1724

+ ("dbus_object_path", ))

1636

1725

1637

1726

_interface = "se.recompile.Mandos.Client"

1638

1727

1639

1728

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

1640

1641

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

1729

1730

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

1642

1731

self.bus = bus

1643

1732

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

1644

1733

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

1650

1739

"/clients/" + client_object_name)

1651

1740

DBusObjectWithProperties.__init__(self, self.bus,

1652

1741

self.dbus_object_path)

1653

1742

1654

1743

def notifychangeproperty(transform_func, dbus_name,

1655

1744

type_func=lambda x: x,

1656

1745

variant_level=1,

1658

1747

_interface=_interface):

1659

1748

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

1660

1749

its changes to DBus.

1661

1750

1662

1751

transform_fun: Function that takes a value and a variant_level

1663

1752

and transforms it to a D-Bus type.

1664

1753

dbus_name: D-Bus name of the variable

1667

1756

variant_level: D-Bus variant level. Default: 1

1668

1757

"""

1669

1758

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

1670

1759

1671

1760

def setter(self, value):

1672

1761

if hasattr(self, "dbus_object_path"):

1673

1762

if (not hasattr(self, attrname) or

1680

1769

else:

1681

1770

dbus_value = transform_func(

1682

1771

type_func(value),

1683

variant_level = variant_level)

1772

variant_level=variant_level)

1684

1773

self.PropertyChanged(dbus.String(dbus_name),

1685

1774

dbus_value)

1686

1775

self.PropertiesChanged(

1687

1776

_interface,

1688

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

1689

dbus_value }),

1777

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

1778

dbus_value}),

1690

1779

dbus.Array())

1691

1780

setattr(self, attrname, value)

1692

1781

1693

1782

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

1694

1783

1695

1784

expires = notifychangeproperty(datetime_to_dbus, "Expires")

1696

1785

approvals_pending = notifychangeproperty(dbus.Boolean,

1697

1786

"ApprovalPending",

1698

type_func = bool)

1787

type_func=bool)

1699

1788

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

1700

1789

last_enabled = notifychangeproperty(datetime_to_dbus,

1701

1790

"LastEnabled")

1702

1791

checker = notifychangeproperty(

1703

1792

dbus.Boolean, "CheckerRunning",

1704

type_func = lambda checker: checker is not None)

1793

type_func=lambda checker: checker is not None)

1705

1794

last_checked_ok = notifychangeproperty(datetime_to_dbus,

1706

1795

"LastCheckedOK")

1707

1796

last_checker_status = notifychangeproperty(dbus.Int16,

1712

1801

"ApprovedByDefault")

1713

1802

approval_delay = notifychangeproperty(

1714

1803

dbus.UInt64, "ApprovalDelay",

1715

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

1804

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

1716

1805

approval_duration = notifychangeproperty(

1717

1806

dbus.UInt64, "ApprovalDuration",

1718

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

1807

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

1719

1808

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

1720

1809

timeout = notifychangeproperty(

1721

1810

dbus.UInt64, "Timeout",

1722

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

1811

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

1723

1812

extended_timeout = notifychangeproperty(

1724

1813

dbus.UInt64, "ExtendedTimeout",

1725

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

1814

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

1726

1815

interval = notifychangeproperty(

1727

1816

dbus.UInt64, "Interval",

1728

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

1817

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

1729

1818

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

1730

1819

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

1731

1820

invalidate_only=True)

1732

1821

1733

1822

del notifychangeproperty

1734

1823

1735

1824

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

1736

1825

try:

1737

1826

self.remove_from_connection()

1740

1829

if hasattr(DBusObjectWithProperties, "__del__"):

1741

1830

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

1742

1831

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

1743

1832

1744

1833

def checker_callback(self, source, condition,

1745

1834

connection, command, *args, **kwargs):

1746

1835

ret = Client.checker_callback(self, source, condition,

1762

1851

| self.last_checker_signal),

1763

1852

dbus.String(command))

1764

1853

return ret

1765

1854

1766

1855

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

1767

1856

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

1768

1857

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

1772

1861

# Emit D-Bus signal

1773

1862

self.CheckerStarted(self.current_checker_command)

1774

1863

return r

1775

1864

1776

1865

def _reset_approved(self):

1777

1866

self.approved = None

1778

1867

return False

1779

1868

1780

1869

def approve(self, value=True):

1781

1870

self.approved = value

1782

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

1783

* 1000), self._reset_approved)

1871

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

1872

* 1000), self._reset_approved)

1784

1873

self.send_changedstate()

1785

1786

## D-Bus methods, signals & properties

1787

1788

## Interfaces

1789

1790

## Signals

1791

1874

1875

# D-Bus methods, signals & properties

1876

1877

# Interfaces

1878

1879

# Signals

1880

1792

1881

# CheckerCompleted - signal

1793

1882

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

1794

1883

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

1795

1884

"D-Bus signal"

1796

1885

pass

1797

1886

1798

1887

# CheckerStarted - signal

1799

1888

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

1800

1889

def CheckerStarted(self, command):

1801

1890

"D-Bus signal"

1802

1891

pass

1803

1892

1804

1893

# PropertyChanged - signal

1805

1894

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

1806

1895

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

1807

1896

def PropertyChanged(self, property, value):

1808

1897

"D-Bus signal"

1809

1898

pass

1810

1899

1811

1900

# GotSecret - signal

1812

1901

@dbus.service.signal(_interface)

1813

1902

def GotSecret(self):

1816

1905

server to mandos-client

1817

1906

"""

1818

1907

pass

1819

1908

1820

1909

# Rejected - signal

1821

1910

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

1822

1911

def Rejected(self, reason):

1823

1912

"D-Bus signal"

1824

1913

pass

1825

1914

1826

1915

# NeedApproval - signal

1827

1916

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

1828

1917

def NeedApproval(self, timeout, default):

1829

1918

"D-Bus signal"

1830

1919

return self.need_approval()

1831

1832

## Methods

1833

1920

1921

# Methods

1922

1834

1923

# Approve - method

1835

1924

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

1836

1925

def Approve(self, value):

1837

1926

self.approve(value)

1838

1927

1839

1928

# CheckedOK - method

1840

1929

@dbus.service.method(_interface)

1841

1930

def CheckedOK(self):

1842

1931

self.checked_ok()

1843

1932

1844

1933

# Enable - method

1845

1934

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

1846

1935

@dbus.service.method(_interface)

1847

1936

def Enable(self):

1848

1937

"D-Bus method"

1849

1938

self.enable()

1850

1939

1851

1940

# StartChecker - method

1852

1941

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

1853

1942

@dbus.service.method(_interface)

1854

1943

def StartChecker(self):

1855

1944

"D-Bus method"

1856

1945

self.start_checker()

1857

1946

1858

1947

# Disable - method

1859

1948

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

1860

1949

@dbus.service.method(_interface)

1861

1950

def Disable(self):

1862

1951

"D-Bus method"

1863

1952

self.disable()

1864

1953

1865

1954

# StopChecker - method

1866

1955

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

1867

1956

@dbus.service.method(_interface)

1868

1957

def StopChecker(self):

1869

1958

self.stop_checker()

1870

1871

## Properties

1872

1959

1960

# Properties

1961

1873

1962

# ApprovalPending - property

1874

1963

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

1875

1964

def ApprovalPending_dbus_property(self):

1876

1965

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

1877

1966

1878

1967

# ApprovedByDefault - property

1879

1968

@dbus_service_property(_interface,

1880

1969

signature="b",

1883

1972

if value is None: # get

1884

1973

return dbus.Boolean(self.approved_by_default)

1885

1974

self.approved_by_default = bool(value)

1886

1975

1887

1976

# ApprovalDelay - property

1888

1977

@dbus_service_property(_interface,

1889

1978

signature="t",

1893

1982

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

1894

1983

* 1000)

1895

1984

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

1896

1985

1897

1986

# ApprovalDuration - property

1898

1987

@dbus_service_property(_interface,

1899

1988

signature="t",

1903

1992

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

1904

1993

* 1000)

1905

1994

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

1906

1995

1907

1996

# Name - property

1908

1997

@dbus_annotations(

1909

1998

{"org.freedesktop.DBus.Property.EmitsChangedSignal": "const"})

1910

1999

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

1911

2000

def Name_dbus_property(self):

1912

2001

return dbus.String(self.name)

1913

2002

1914

2003

# Fingerprint - property

1915

2004

@dbus_annotations(

1916

2005

{"org.freedesktop.DBus.Property.EmitsChangedSignal": "const"})

1917

2006

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

1918

2007

def Fingerprint_dbus_property(self):

1919

2008

return dbus.String(self.fingerprint)

1920

2009

1921

2010

# Host - property

1922

2011

@dbus_service_property(_interface,

1923

2012

signature="s",

1926

2015

if value is None: # get

1927

2016

return dbus.String(self.host)

1928

2017

self.host = str(value)

1929

2018

1930

2019

# Created - property

1931

2020

@dbus_annotations(

1932

2021

{"org.freedesktop.DBus.Property.EmitsChangedSignal": "const"})

1933

2022

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

1934

2023

def Created_dbus_property(self):

1935

2024

return datetime_to_dbus(self.created)

1936

2025

1937

2026

# LastEnabled - property

1938

2027

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

1939

2028

def LastEnabled_dbus_property(self):

1940

2029

return datetime_to_dbus(self.last_enabled)

1941

2030

1942

2031

# Enabled - property

1943

2032

@dbus_service_property(_interface,

1944

2033

signature="b",

1950

2039

self.enable()

1951

2040

else:

1952

2041

self.disable()

1953

2042

1954

2043

# LastCheckedOK - property

1955

2044

@dbus_service_property(_interface,

1956

2045

signature="s",

1960

2049

self.checked_ok()

1961

2050

return

1962

2051

return datetime_to_dbus(self.last_checked_ok)

1963

2052

1964

2053

# LastCheckerStatus - property

1965

2054

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

1966

2055

def LastCheckerStatus_dbus_property(self):

1967

2056

return dbus.Int16(self.last_checker_status)

1968

2057

1969

2058

# Expires - property

1970

2059

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

1971

2060

def Expires_dbus_property(self):

1972

2061

return datetime_to_dbus(self.expires)

1973

2062

1974

2063

# LastApprovalRequest - property

1975

2064

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

1976

2065

def LastApprovalRequest_dbus_property(self):

1977

2066

return datetime_to_dbus(self.last_approval_request)

1978

2067

1979

2068

# Timeout - property

1980

2069

@dbus_service_property(_interface,

1981

2070

signature="t",

1996

2085

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

1997

2086

is None):

1998

2087

return

1999

gobject.source_remove(self.disable_initiator_tag)

2000

self.disable_initiator_tag = gobject.timeout_add(

2088

GLib.source_remove(self.disable_initiator_tag)

2089

self.disable_initiator_tag = GLib.timeout_add(

2001

2090

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

2002

2091

self.disable)

2003

2092

2004

2093

# ExtendedTimeout - property

2005

2094

@dbus_service_property(_interface,

2006

2095

signature="t",

2010

2099

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

2011

2100

* 1000)

2012

2101

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

2013

2102

2014

2103

# Interval - property

2015

2104

@dbus_service_property(_interface,

2016

2105

signature="t",

2023

2112

return

2024

2113

if self.enabled:

2025

2114

# Reschedule checker run

2026

gobject.source_remove(self.checker_initiator_tag)

2027

self.checker_initiator_tag = gobject.timeout_add(

2115

GLib.source_remove(self.checker_initiator_tag)

2116

self.checker_initiator_tag = GLib.timeout_add(

2028

2117

value, self.start_checker)

2029

self.start_checker() # Start one now, too

2030

2118

self.start_checker() # Start one now, too

2119

2031

2120

# Checker - property

2032

2121

@dbus_service_property(_interface,

2033

2122

signature="s",

2036

2125

if value is None: # get

2037

2126

return dbus.String(self.checker_command)

2038

2127

self.checker_command = str(value)

2039

2128

2040

2129

# CheckerRunning - property

2041

2130

@dbus_service_property(_interface,

2042

2131

signature="b",

2048

2137

self.start_checker()

2049

2138

else:

2050

2139

self.stop_checker()

2051

2140

2052

2141

# ObjectPath - property

2053

2142

@dbus_annotations(

2054

2143

{"org.freedesktop.DBus.Property.EmitsChangedSignal": "const",

2055

2144

"org.freedesktop.DBus.Deprecated": "true"})

2056

2145

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

2057

2146

def ObjectPath_dbus_property(self):

2058

return self.dbus_object_path # is already a dbus.ObjectPath

2059

2147

return self.dbus_object_path # is already a dbus.ObjectPath

2148

2060

2149

# Secret = property

2061

2150

@dbus_annotations(

2062

2151

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

2067

2156

byte_arrays=True)

2068

2157

def Secret_dbus_property(self, value):

2069

2158

self.secret = bytes(value)

2070

2159

2071

2160

del _interface

2072

2161

2073

2162

2077

2166

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

2078

2167

if not self._pipe.recv():

2079

2168

raise KeyError(fpr)

2080

2169

2081

2170

def __getattribute__(self, name):

2082

2171

if name == '_pipe':

2083

2172

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

2086

2175

if data[0] == 'data':

2087

2176

return data[1]

2088

2177

if data[0] == 'function':

2089

2178

2090

2179

def func(*args, **kwargs):

2091

2180

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

2092

2181

return self._pipe.recv()[1]

2093

2182

2094

2183

return func

2095

2184

2096

2185

def __setattr__(self, name, value):

2097

2186

if name == '_pipe':

2098

2187

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

2101

2190

2102

2191

class ClientHandler(socketserver.BaseRequestHandler, object):

2103

2192

"""A class to handle client connections.

2104

2193

2105

2194

Instantiated once for each connection to handle it.

2106

2195

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

2107

2196

2108

2197

def handle(self):

2109

2198

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

2110

2199

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

2111

2200

str(self.client_address))

2112

2201

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

2113

2202

self.server.child_pipe.fileno())

2114

2203

2115

2204

session = gnutls.ClientSession(self.request)

2116

2117

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

2118

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

2119

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

2120

# "+DHE-DSS"))

2205

2206

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

2207

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

2208

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

2209

# "+DHE-DSS"))

2121

2210

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

2122

2211

priority = self.server.gnutls_priority

2123

2212

if priority is None:

2124

2213

priority = "NORMAL"

2125

gnutls.priority_set_direct(session._c_object, priority,

2214

gnutls.priority_set_direct(session._c_object,

2215

priority.encode("utf-8"),

2126

2216

None)

2127

2217

2128

2218

# Start communication using the Mandos protocol

2129

2219

# Get protocol number

2130

2220

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

2135

2225

except (ValueError, IndexError, RuntimeError) as error:

2136

2226

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

2137

2227

return

2138

2228

2139

2229

# Start GnuTLS connection

2140

2230

try:

2141

2231

session.handshake()

2145

2235

# established. Just abandon the request.

2146

2236

return

2147

2237

logger.debug("Handshake succeeded")

2148

2238

2149

2239

approval_required = False

2150

2240

try:

2151

2241

try:

2155

2245

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

2156

2246

return

2157

2247

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

2158

2248

2159

2249

try:

2160

2250

client = ProxyClient(child_pipe, fpr,

2161

2251

self.client_address)

2162

2252

except KeyError:

2163

2253

return

2164

2254

2165

2255

if client.approval_delay:

2166

2256

delay = client.approval_delay

2167

2257

client.approvals_pending += 1

2168

2258

approval_required = True

2169

2259

2170

2260

while True:

2171

2261

if not client.enabled:

2172

2262

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

2175

2265

# Emit D-Bus signal

2176

2266

client.Rejected("Disabled")

2177

2267

return

2178

2268

2179

2269

if client.approved or not client.approval_delay:

2180

#We are approved or approval is disabled

2270

# We are approved or approval is disabled

2181

2271

break

2182

2272

elif client.approved is None:

2183

2273

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

2194

2284

# Emit D-Bus signal

2195

2285

client.Rejected("Denied")

2196

2286

return

2197

2198

#wait until timeout or approved

2287

2288

# wait until timeout or approved

2199

2289

time = datetime.datetime.now()

2200

2290

client.changedstate.acquire()

2201

2291

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

2214

2304

break

2215

2305

else:

2216

2306

delay -= time2 - time

2217

2218

sent_size = 0

2219

while sent_size < len(client.secret):

2220

try:

2221

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

2222

except gnutls.Error as error:

2223

logger.warning("gnutls send failed",

2224

exc_info=error)

2225

return

2226

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

2227

len(client.secret) - (sent_size

2228

+ sent))

2229

sent_size += sent

2230

2307

2308

try:

2309

session.send(client.secret)

2310

except gnutls.Error as error:

2311

logger.warning("gnutls send failed",

2312

exc_info=error)

2313

return

2314

2231

2315

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

2232

2316

# bump the timeout using extended_timeout

2233

2317

client.bump_timeout(client.extended_timeout)

2234

2318

if self.server.use_dbus:

2235

2319

# Emit D-Bus signal

2236

2320

client.GotSecret()

2237

2321

2238

2322

finally:

2239

2323

if approval_required:

2240

2324

client.approvals_pending -= 1

2243

2327

except gnutls.Error as error:

2244

2328

logger.warning("GnuTLS bye failed",

2245

2329

exc_info=error)

2246

2330

2247

2331

@staticmethod

2248

2332

def peer_certificate(session):

2249

2333

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

2261

2345

return None

2262

2346

cert = cert_list[0]

2263

2347

return ctypes.string_at(cert.data, cert.size)

2264

2348

2265

2349

@staticmethod

2266

2350

def fingerprint(openpgp):

2267

2351

"Convert an OpenPGP bytestring to a hexdigit fingerprint"

2300

2384

2301

2385

class MultiprocessingMixIn(object):

2302

2386

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

2303

2387

2304

2388

def sub_process_main(self, request, address):

2305

2389

try:

2306

2390

self.finish_request(request, address)

2307

2391

except Exception:

2308

2392

self.handle_error(request, address)

2309

2393

self.close_request(request)

2310

2394

2311

2395

def process_request(self, request, address):

2312

2396

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

2313

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

2314

args = (request, address))

2397

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

2398

args=(request, address))

2315

2399

proc.start()

2316

2400

return proc

2317

2401

2318

2402

2319

2403

class MultiprocessingMixInWithPipe(MultiprocessingMixIn, object):

2320

2404

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

2321

2405

2322

2406

def process_request(self, request, client_address):

2323

2407

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

2324

2408

2325

2409

This function creates a new pipe in self.pipe

2326

2410

"""

2327

2411

parent_pipe, self.child_pipe = multiprocessing.Pipe()

2328

2412

2329

2413

proc = MultiprocessingMixIn.process_request(self, request,

2330

2414

client_address)

2331

2415

self.child_pipe.close()

2332

2416

self.add_pipe(parent_pipe, proc)

2333

2417

2334

2418

def add_pipe(self, parent_pipe, proc):

2335

2419

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

2336

2420

raise NotImplementedError()

2339

2423

class IPv6_TCPServer(MultiprocessingMixInWithPipe,

2340

2424

socketserver.TCPServer, object):

2341

2425

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

2342

2426

2343

2427

Attributes:

2344

2428

enabled: Boolean; whether this server is activated yet

2345

2429

interface: None or a network interface name (string)

2346

2430

use_ipv6: Boolean; to use IPv6 or not

2347

2431

"""

2348

2432

2349

2433

def __init__(self, server_address, RequestHandlerClass,

2350

2434

interface=None,

2351

2435

use_ipv6=True,

2361

2445

self.socketfd = socketfd

2362

2446

# Save the original socket.socket() function

2363

2447

self.socket_socket = socket.socket

2448

2364

2449

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

2365

#

2450

#

2366

2451

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

2367

2452

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

2368

2453

# patching socket.socket.)

2369

#

2454

#

2370

2455

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

2371

2456

@functools.wraps(socket.socket)

2372

2457

def socket_wrapper(*args, **kwargs):

2384

2469

# socket_wrapper(), if socketfd was set.

2385

2470

socketserver.TCPServer.__init__(self, server_address,

2386

2471

RequestHandlerClass)

2387

2472

2388

2473

def server_bind(self):

2389

2474

"""This overrides the normal server_bind() function

2390

2475

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

2391

2476

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

2477

global SO_BINDTODEVICE

2392

2478

if self.interface is not None:

2393

2479

if SO_BINDTODEVICE is None:

2394

logger.error("SO_BINDTODEVICE does not exist;"

2395

" cannot bind to interface %s",

2396

self.interface)

2397

else:

2398

try:

2399

self.socket.setsockopt(

2400

socket.SOL_SOCKET, SO_BINDTODEVICE,

2401

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

2402

except socket.error as error:

2403

if error.errno == errno.EPERM:

2404

logger.error("No permission to bind to"

2405

" interface %s", self.interface)

2406

elif error.errno == errno.ENOPROTOOPT:

2407

logger.error("SO_BINDTODEVICE not available;"

2408

" cannot bind to interface %s",

2409

self.interface)

2410

elif error.errno == errno.ENODEV:

2411

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

2412

" cannot bind", self.interface)

2413

else:

2414

raise

2480

# Fall back to a hard-coded value which seems to be

2481

# common enough.

2482

logger.warning("SO_BINDTODEVICE not found, trying 25")

2483

SO_BINDTODEVICE = 25

2484

try:

2485

self.socket.setsockopt(

2486

socket.SOL_SOCKET, SO_BINDTODEVICE,

2487

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

2488

except socket.error as error:

2489

if error.errno == errno.EPERM:

2490

logger.error("No permission to bind to"

2491

" interface %s", self.interface)

2492

elif error.errno == errno.ENOPROTOOPT:

2493

logger.error("SO_BINDTODEVICE not available;"

2494

" cannot bind to interface %s",

2495

self.interface)

2496

elif error.errno == errno.ENODEV:

2497

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

2498

" cannot bind", self.interface)

2499

else:

2500

raise

2415

2501

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

2416

2502

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

2417

2503

if not self.server_address[0]:

2418

2504

if self.address_family == socket.AF_INET6:

2419

any_address = "::" # in6addr_any

2505

any_address = "::" # in6addr_any

2420

2506

else:

2421

any_address = "0.0.0.0" # INADDR_ANY

2507

any_address = "0.0.0.0" # INADDR_ANY

2422

2508

self.server_address = (any_address,

2423

2509

self.server_address[1])

2424

2510

elif not self.server_address[1]:

2434

2520

2435

2521

class MandosServer(IPv6_TCPServer):

2436

2522

"""Mandos server.

2437

2523

2438

2524

Attributes:

2439

2525

clients: set of Client objects

2440

2526

gnutls_priority GnuTLS priority string

2441

2527

use_dbus: Boolean; to emit D-Bus signals or not

2442

2443

Assumes a gobject.MainLoop event loop.

2528

2529

Assumes a GLib.MainLoop event loop.

2444

2530

"""

2445

2531

2446

2532

def __init__(self, server_address, RequestHandlerClass,

2447

2533

interface=None,

2448

2534

use_ipv6=True,

2458

2544

self.gnutls_priority = gnutls_priority

2459

2545

IPv6_TCPServer.__init__(self, server_address,

2460

2546

RequestHandlerClass,

2461

interface = interface,

2462

use_ipv6 = use_ipv6,

2463

socketfd = socketfd)

2464

2547

interface=interface,

2548

use_ipv6=use_ipv6,

2549

socketfd=socketfd)

2550

2465

2551

def server_activate(self):

2466

2552

if self.enabled:

2467

2553

return socketserver.TCPServer.server_activate(self)

2468

2554

2469

2555

def enable(self):

2470

2556

self.enabled = True

2471

2557

2472

2558

def add_pipe(self, parent_pipe, proc):

2473

2559

# Call "handle_ipc" for both data and EOF events

2474

gobject.io_add_watch(

2560

GLib.io_add_watch(

2475

2561

parent_pipe.fileno(),

2476

gobject.IO_IN | gobject.IO_HUP,

2562

GLib.IO_IN | GLib.IO_HUP,

2477

2563

functools.partial(self.handle_ipc,

2478

parent_pipe = parent_pipe,

2479

proc = proc))

2480

2564

parent_pipe=parent_pipe,

2565

proc=proc))

2566

2481

2567

def handle_ipc(self, source, condition,

2482

2568

parent_pipe=None,

2483

proc = None,

2569

proc=None,

2484

2570

client_object=None):

2485

2571

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

2486

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

2572

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

2487

2573

# Wait for other process to exit

2488

2574

proc.join()

2489

2575

return False

2490

2576

2491

2577

# Read a request from the child

2492

2578

request = parent_pipe.recv()

2493

2579

command = request[0]

2494

2580

2495

2581

if command == 'init':

2496

fpr = request[1]

2582

fpr = request[1].decode("ascii")

2497

2583

address = request[2]

2498

2499

for c in self.clients.itervalues():

2584

2585

for c in self.clients.values():

2500

2586

if c.fingerprint == fpr:

2501

2587

client = c

2502

2588

break

2509

2595

address[0])

2510

2596

parent_pipe.send(False)

2511

2597

return False

2512

2513

gobject.io_add_watch(

2598

2599

GLib.io_add_watch(

2514

2600

parent_pipe.fileno(),

2515

gobject.IO_IN | gobject.IO_HUP,

2601

GLib.IO_IN | GLib.IO_HUP,

2516

2602

functools.partial(self.handle_ipc,

2517

parent_pipe = parent_pipe,

2518

proc = proc,

2519

client_object = client))

2603

parent_pipe=parent_pipe,

2604

proc=proc,

2605

client_object=client))

2520

2606

parent_pipe.send(True)

2521

2607

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

2522

2608

# same fileno

2525

2611

funcname = request[1]

2526

2612

args = request[2]

2527

2613

kwargs = request[3]

2528

2614

2529

2615

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

2530

2616

funcname)(*args,

2531

2617

**kwargs)))

2532

2618

2533

2619

if command == 'getattr':

2534

2620

attrname = request[1]

2535

2621

if isinstance(client_object.__getattribute__(attrname),

2538

2624

else:

2539

2625

parent_pipe.send((

2540

2626

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

2541

2627

2542

2628

if command == 'setattr':

2543

2629

attrname = request[1]

2544

2630

value = request[2]

2545

2631

setattr(client_object, attrname, value)

2546

2632

2547

2633

return True

2548

2634

2549

2635

2550

2636

def rfc3339_duration_to_delta(duration):

2551

2637

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

2552

2638

2553

2639

>>> rfc3339_duration_to_delta("P7D")

2554

2640

datetime.timedelta(7)

2555

2641

>>> rfc3339_duration_to_delta("PT60S")

2565

2651

>>> rfc3339_duration_to_delta("P1DT3M20S")

2566

2652

datetime.timedelta(1, 200)

2567

2653

"""

2568

2654

2569

2655

# Parsing an RFC 3339 duration with regular expressions is not

2570

2656

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

2571

2657

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

2572

2658

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

2573

2659

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

2574

2660

# avoid excessive use of external libraries.

2575

2661

2576

2662

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

2577

2663

Token = collections.namedtuple("Token", (

2578

2664

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

2611

2697

frozenset((token_year, token_month,

2612

2698

token_day, token_time,

2613

2699

token_week)))

2614

# Define starting values

2615

value = datetime.timedelta() # Value so far

2700

# Define starting values:

2701

# Value so far

2702

value = datetime.timedelta()

2616

2703

found_token = None

2617

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

2618

s = duration # String left to parse

2704

# Following valid tokens

2705

followers = frozenset((token_duration, ))

2706

# String left to parse

2707

s = duration

2619

2708

# Loop until end token is found

2620

2709

while found_token is not token_end:

2621

2710

# Search for any currently valid tokens

2645

2734

2646

2735

def string_to_delta(interval):

2647

2736

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

2648

2737

2649

2738

>>> string_to_delta('7d')

2650

2739

datetime.timedelta(7)

2651

2740

>>> string_to_delta('60s')

2659

2748

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

2660

2749

datetime.timedelta(0, 330)

2661

2750

"""

2662

2751

2663

2752

try:

2664

2753

return rfc3339_duration_to_delta(interval)

2665

2754

except ValueError:

2666

2755

pass

2667

2756

2668

2757

timevalue = datetime.timedelta(0)

2669

2758

for s in interval.split():

2670

2759

try:

2688

2777

return timevalue

2689

2778

2690

2779

2691

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

2780

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

2692

2781

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

2693

2782

2694

2783

This should really exist as os.daemon, but it doesn't (yet)."""

2695

2784

if os.fork():

2696

2785

sys.exit()

2714

2803

2715

2804

2716

2805

def main():

2717

2806

2718

2807

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

2719

2808

# Parsing of options, both command line and config file

2720

2809

2721

2810

parser = argparse.ArgumentParser()

2722

2811

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

2723

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

2812

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

2724

2813

help="show version number and exit")

2725

2814

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

2726

2815

help="Bind to interface IF")

2762

2851

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

2763

2852

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

2764

2853

default=None)

2765

2854

2766

2855

options = parser.parse_args()

2767

2856

2768

2857

if options.check:

2769

2858

import doctest

2770

2859

fail_count, test_count = doctest.testmod()

2771

2860

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

2772

2861

2773

2862

# Default values for config file for server-global settings

2774

server_defaults = { "interface": "",

2775

"address": "",

2776

"port": "",

2777

"debug": "False",

2778

"priority":

2779

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

2780

":+SIGN-DSA-SHA256",

2781

"servicename": "Mandos",

2782

"use_dbus": "True",

2783

"use_ipv6": "True",

2784

"debuglevel": "",

2785

"restore": "True",

2786

"socket": "",

2787

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

2788

"foreground": "False",

2789

"zeroconf": "True",

2790

}

2791

2863

server_defaults = {"interface": "",

2864

"address": "",

2865

"port": "",

2866

"debug": "False",

2867

"priority":

2868

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

2869

":+SIGN-DSA-SHA256",

2870

"servicename": "Mandos",

2871

"use_dbus": "True",

2872

"use_ipv6": "True",

2873

"debuglevel": "",

2874

"restore": "True",

2875

"socket": "",

2876

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

2877

"foreground": "False",

2878

"zeroconf": "True",

2879

}

2880

2792

2881

# Parse config file for server-global settings

2793

2882

server_config = configparser.SafeConfigParser(server_defaults)

2794

2883

del server_defaults

2796

2885

# Convert the SafeConfigParser object to a dict

2797

2886

server_settings = server_config.defaults()

2798

2887

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

2799

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

2888

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

2889

"foreground", "zeroconf"):

2800

2890

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

2801

2891

option)

2802

2892

if server_settings["port"]:

2812

2902

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

2813

2903

["socket"])

2814

2904

del server_config

2815

2905

2816

2906

# Override the settings from the config file with command line

2817

2907

# options, if set.

2818

2908

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

2836

2926

if server_settings["debug"]:

2837

2927

server_settings["foreground"] = True

2838

2928

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

2839

2929

2840

2930

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

2841

2931

2842

2932

if (not server_settings["zeroconf"]

2843

2933

and not (server_settings["port"]

2844

2934

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

2845

2935

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

2846

2936

2847

2937

# For convenience

2848

2938

debug = server_settings["debug"]

2849

2939

debuglevel = server_settings["debuglevel"]

2853

2943

stored_state_file)

2854

2944

foreground = server_settings["foreground"]

2855

2945

zeroconf = server_settings["zeroconf"]

2856

2946

2857

2947

if debug:

2858

2948

initlogger(debug, logging.DEBUG)

2859

2949

else:

2862

2952

else:

2863

2953

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

2864

2954

initlogger(debug, level)

2865

2955

2866

2956

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

2867

2957

syslogger.setFormatter(

2868

2958

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

2869

2959

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

2870

2960

server_settings["servicename"])))

2871

2961

2872

2962

# Parse config file with clients

2873

2963

client_config = configparser.SafeConfigParser(Client

2874

2964

.client_defaults)

2875

2965

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

2876

2966

"clients.conf"))

2877

2967

2878

2968

global mandos_dbus_service

2879

2969

mandos_dbus_service = None

2880

2970

2881

2971

socketfd = None

2882

2972

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

2883

2973

socketfd = server_settings["socket"]

2899

2989

except IOError as e:

2900

2990

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

2901

2991

exc_info=e)

2902

2903

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

2992

2993

for name, group in (("_mandos", "_mandos"),

2994

("mandos", "mandos"),

2995

("nobody", "nogroup")):

2904

2996

try:

2905

2997

uid = pwd.getpwnam(name).pw_uid

2906

gid = pwd.getpwnam(name).pw_gid

2998

gid = pwd.getpwnam(group).pw_gid

2907

2999

break

2908

3000

except KeyError:

2909

3001

continue

2913

3005

try:

2914

3006

os.setgid(gid)

2915

3007

os.setuid(uid)

3008

if debug:

3009

logger.debug("Did setuid/setgid to {}:{}".format(uid,

3010

gid))

2916

3011

except OSError as error:

3012

logger.warning("Failed to setuid/setgid to {}:{}: {}"

3013

.format(uid, gid, os.strerror(error.errno)))

2917

3014

if error.errno != errno.EPERM:

2918

3015

raise

2919

3016

2920

3017

if debug:

2921

3018

# Enable all possible GnuTLS debugging

2922

3019

2923

3020

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

2924

3021

# - GnuTLS manual

2925

3022

gnutls.global_set_log_level(11)

2926

3023

2927

3024

@gnutls.log_func

2928

3025

def debug_gnutls(level, string):

2929

3026

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

2930

3027

2931

3028

gnutls.global_set_log_function(debug_gnutls)

2932

3029

2933

3030

# Redirect stdin so all checkers get /dev/null

2934

3031

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

2935

3032

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

2936

3033

if null > 2:

2937

3034

os.close(null)

2938

3035

2939

3036

# Need to fork before connecting to D-Bus

2940

3037

if not foreground:

2941

3038

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

2942

3039

daemon()

2943

2944

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

2945

# need to inform gobject that threads will be used.

2946

gobject.threads_init()

2947

3040

3041

# multiprocessing will use threads, so before we use GLib we need

3042

# to inform GLib that threads will be used.

3043

GLib.threads_init()

3044

2948

3045

global main_loop

2949

3046

# From the Avahi example code

2950

3047

DBusGMainLoop(set_as_default=True)

2951

main_loop = gobject.MainLoop()

3048

main_loop = GLib.MainLoop()

2952

3049

bus = dbus.SystemBus()

2953

3050

# End of Avahi example code

2954

3051

if use_dbus:

2967

3064

if zeroconf:

2968

3065

protocol = avahi.PROTO_INET6 if use_ipv6 else avahi.PROTO_INET

2969

3066

service = AvahiServiceToSyslog(

2970

name = server_settings["servicename"],

2971

servicetype = "_mandos._tcp",

2972

protocol = protocol,

2973

bus = bus)

3067

name=server_settings["servicename"],

3068

servicetype="_mandos._tcp",

3069

protocol=protocol,

3070

bus=bus)

2974

3071

if server_settings["interface"]:

2975

3072

service.interface = if_nametoindex(

2976

3073

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

2977

3074

2978

3075

global multiprocessing_manager

2979

3076

multiprocessing_manager = multiprocessing.Manager()

2980

3077

2981

3078

client_class = Client

2982

3079

if use_dbus:

2983

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

2984

3080

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

3081

2985

3082

client_settings = Client.config_parser(client_config)

2986

3083

old_client_settings = {}

2987

3084

clients_data = {}

2988

3085

2989

3086

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

2990

3087

global wnull

2991

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

3088

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

2992

3089

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

2993

3090

# mode

2994

3091

if debug or not foreground:

2995

3092

wnull.close()

2996

3093

2997

3094

# Get client data and settings from last running state.

2998

3095

if server_settings["restore"]:

2999

3096

try:

3000

3097

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

3001

clients_data, old_client_settings = pickle.load(

3002

stored_state)

3098

if sys.version_info.major == 2:

3099

clients_data, old_client_settings = pickle.load(

3100

stored_state)

3101

else:

3102

bytes_clients_data, bytes_old_client_settings = (

3103

pickle.load(stored_state, encoding="bytes"))

3104

# Fix bytes to strings

3105

# clients_data

3106

# .keys()

3107

clients_data = {(key.decode("utf-8")

3108

if isinstance(key, bytes)

3109

else key): value

3110

for key, value in

3111

bytes_clients_data.items()}

3112

del bytes_clients_data

3113

for key in clients_data:

3114

value = {(k.decode("utf-8")

3115

if isinstance(k, bytes) else k): v

3116

for k, v in

3117

clients_data[key].items()}

3118

clients_data[key] = value

3119

# .client_structure

3120

value["client_structure"] = [

3121

(s.decode("utf-8")

3122

if isinstance(s, bytes)

3123

else s) for s in

3124

value["client_structure"]]

3125

# .name & .host

3126

for k in ("name", "host"):

3127

if isinstance(value[k], bytes):

3128

value[k] = value[k].decode("utf-8")

3129

# old_client_settings

3130

# .keys()

3131

old_client_settings = {

3132

(key.decode("utf-8")

3133

if isinstance(key, bytes)

3134

else key): value

3135

for key, value in

3136

bytes_old_client_settings.items()}

3137

del bytes_old_client_settings

3138

# .host

3139

for value in old_client_settings.values():

3140

if isinstance(value["host"], bytes):

3141

value["host"] = (value["host"]

3142

.decode("utf-8"))

3003

3143

os.remove(stored_state_path)

3004

3144

except IOError as e:

3005

3145

if e.errno == errno.ENOENT:

3013

3153

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

3014

3154

"EOFError:",

3015

3155

exc_info=e)

3016

3156

3017

3157

with PGPEngine() as pgp:

3018

3158

for client_name, client in clients_data.items():

3019

3159

# Skip removed clients

3020

3160

if client_name not in client_settings:

3021

3161

continue

3022

3162

3023

3163

# Decide which value to use after restoring saved state.

3024

3164

# We have three different values: Old config file,

3025

3165

# new config file, and saved state.

3036

3176

client[name] = value

3037

3177

except KeyError:

3038

3178

pass

3039

3179

3040

3180

# Clients who has passed its expire date can still be

3041

3181

# enabled if its last checker was successful. A Client

3042

3182

# whose checker succeeded before we stored its state is

3075

3215

client_name))

3076

3216

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

3077

3217

["secret"])

3078

3218

3079

3219

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

3080

3220

for client_name in (set(old_client_settings)

3081

3221

- set(client_settings)):

3083

3223

for client_name in (set(client_settings)

3084

3224

- set(old_client_settings)):

3085

3225

clients_data[client_name] = client_settings[client_name]

3086

3226

3087

3227

# Create all client objects

3088

3228

for client_name, client in clients_data.items():

3089

3229

tcp_server.clients[client_name] = client_class(

3090

name = client_name,

3091

settings = client,

3092

server_settings = server_settings)

3093

3230

name=client_name,

3231

settings=client,

3232

server_settings=server_settings)

3233

3094

3234

if not tcp_server.clients:

3095

3235

logger.warning("No clients defined")

3096

3236

3097

3237

if not foreground:

3098

3238

if pidfile is not None:

3099

3239

pid = os.getpid()

3105

3245

pidfilename, pid)

3106

3246

del pidfile

3107

3247

del pidfilename

3108

3109

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

3110

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

3111

3248

3249

for termsig in (signal.SIGHUP, signal.SIGTERM):

3250

GLib.unix_signal_add(GLib.PRIORITY_HIGH, termsig,

3251

lambda: main_loop.quit() and False)

3252

3112

3253

if use_dbus:

3113

3254

3114

3255

@alternate_dbus_interfaces(

3115

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

3256

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

3116

3257

class MandosDBusService(DBusObjectWithObjectManager):

3117

3258

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

3118

3259

3119

3260

def __init__(self):

3120

3261

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

3121

3262

3122

3263

_interface = "se.recompile.Mandos"

3123

3264

3124

3265

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

3125

3266

def ClientAdded(self, objpath):

3126

3267

"D-Bus signal"

3127

3268

pass

3128

3269

3129

3270

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

3130

3271

def ClientNotFound(self, fingerprint, address):

3131

3272

"D-Bus signal"

3132

3273

pass

3133

3274

3134

3275

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

3135

3276

"true"})

3136

3277

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

3137

3278

def ClientRemoved(self, objpath, name):

3138

3279

"D-Bus signal"

3139

3280

pass

3140

3281

3141

3282

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

3142

3283

"true"})

3143

3284

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

3144

3285

def GetAllClients(self):

3145

3286

"D-Bus method"

3146

3287

return dbus.Array(c.dbus_object_path for c in

3147

tcp_server.clients.itervalues())

3148

3288

tcp_server.clients.values())

3289

3149

3290

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

3150

3291

"true"})

3151

3292

@dbus.service.method(_interface,

3153

3294

def GetAllClientsWithProperties(self):

3154

3295

"D-Bus method"

3155

3296

return dbus.Dictionary(

3156

{ c.dbus_object_path: c.GetAll(

3297

{c.dbus_object_path: c.GetAll(

3157

3298

"se.recompile.Mandos.Client")

3158

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

3299

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

3159

3300

signature="oa{sv}")

3160

3301

3161

3302

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

3162

3303

def RemoveClient(self, object_path):

3163

3304

"D-Bus method"

3164

for c in tcp_server.clients.itervalues():

3305

for c in tcp_server.clients.values():

3165

3306

if c.dbus_object_path == object_path:

3166

3307

del tcp_server.clients[c.name]

3167

3308

c.remove_from_connection()

3171

3312

self.client_removed_signal(c)

3172

3313

return

3173

3314

raise KeyError(object_path)

3174

3315

3175

3316

del _interface

3176

3317

3177

3318

@dbus.service.method(dbus.OBJECT_MANAGER_IFACE,

3178

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

3319

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

3179

3320

def GetManagedObjects(self):

3180

3321

"""D-Bus method"""

3181

3322

return dbus.Dictionary(

3182

{ client.dbus_object_path:

3183

dbus.Dictionary(

3184

{ interface: client.GetAll(interface)

3185

for interface in

3186

client._get_all_interface_names()})

3187

for client in tcp_server.clients.values()})

3188

3323

{client.dbus_object_path:

3324

dbus.Dictionary(

3325

{interface: client.GetAll(interface)

3326

for interface in

3327

client._get_all_interface_names()})

3328

for client in tcp_server.clients.values()})

3329

3189

3330

def client_added_signal(self, client):

3190

3331

"""Send the new standard signal and the old signal"""

3191

3332

if use_dbus:

3193

3334

self.InterfacesAdded(

3194

3335

client.dbus_object_path,

3195

3336

dbus.Dictionary(

3196

{ interface: client.GetAll(interface)

3197

for interface in

3198

client._get_all_interface_names()}))

3337

{interface: client.GetAll(interface)

3338

for interface in

3339

client._get_all_interface_names()}))

3199

3340

# Old signal

3200

3341

self.ClientAdded(client.dbus_object_path)

3201

3342

3202

3343

def client_removed_signal(self, client):

3203

3344

"""Send the new standard signal and the old signal"""

3204

3345

if use_dbus:

3209

3350

# Old signal

3210

3351

self.ClientRemoved(client.dbus_object_path,

3211

3352

client.name)

3212

3353

3213

3354

mandos_dbus_service = MandosDBusService()

3214

3355

3356

# Save modules to variables to exempt the modules from being

3357

# unloaded before the function registered with atexit() is run.

3358

mp = multiprocessing

3359

wn = wnull

3360

3215

3361

def cleanup():

3216

3362

"Cleanup function; run on exit"

3217

3363

if zeroconf:

3218

3364

service.cleanup()

3219

3220

multiprocessing.active_children()

3221

wnull.close()

3365

3366

mp.active_children()

3367

wn.close()

3222

3368

if not (tcp_server.clients or client_settings):

3223

3369

return

3224

3370

3225

3371

# Store client before exiting. Secrets are encrypted with key

3226

3372

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

3227

3373

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

3228

3374

clients = {}

3229

3375

with PGPEngine() as pgp:

3230

for client in tcp_server.clients.itervalues():

3376

for client in tcp_server.clients.values():

3231

3377

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

3232

3378

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

3233

3379

key)

3234

3380

client_dict = {}

3235

3381

3236

3382

# A list of attributes that can not be pickled

3237

3383

# + secret.

3238

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

3239

"checker", "server_settings" }

3384

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

3385

"checker", "server_settings"}

3240

3386

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

3241

3387

.Object):

3242

3388

exclude.add(name)

3243

3389

3244

3390

client_dict["encrypted_secret"] = (client

3245

3391

.encrypted_secret)

3246

3392

for attr in client.client_structure:

3247

3393

if attr not in exclude:

3248

3394

client_dict[attr] = getattr(client, attr)

3249

3395

3250

3396

clients[client.name] = client_dict

3251

3397

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

3252

3398

3253

3399

try:

3254

3400

with tempfile.NamedTemporaryFile(

3255

3401

mode='wb',

3257

3403

prefix='clients-',

3258

3404

dir=os.path.dirname(stored_state_path),

3259

3405

delete=False) as stored_state:

3260

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

3406

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

3407

protocol=2)

3261

3408

tempname = stored_state.name

3262

3409

os.rename(tempname, stored_state_path)

3263

3410

except (IOError, OSError) as e:

3273

3420

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

3274

3421

exc_info=e)

3275

3422

raise

3276

3423

3277

3424

# Delete all clients, and settings from config

3278

3425

while tcp_server.clients:

3279

3426

name, client = tcp_server.clients.popitem()

3285

3432

if use_dbus:

3286

3433

mandos_dbus_service.client_removed_signal(client)

3287

3434

client_settings.clear()

3288

3435

3289

3436

atexit.register(cleanup)

3290

3291

for client in tcp_server.clients.itervalues():

3437

3438

for client in tcp_server.clients.values():

3292

3439

if use_dbus:

3293

3440

# Emit D-Bus signal for adding

3294

3441

mandos_dbus_service.client_added_signal(client)

3295

3442

# Need to initiate checking of clients

3296

3443

if client.enabled:

3297

3444

client.init_checker()

3298

3445

3299

3446

tcp_server.enable()

3300

3447

tcp_server.server_activate()

3301

3448

3302

3449

# Find out what port we got

3303

3450

if zeroconf:

3304

3451

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

3309

3456

else: # IPv4

3310

3457

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

3311

3458

*tcp_server.socket.getsockname())

3312

3313

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

3314

3459

3460

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

3461

3315

3462

try:

3316

3463

if zeroconf:

3317

3464

# From the Avahi example code

3322

3469

cleanup()

3323

3470

sys.exit(1)

3324

3471

# End of Avahi example code

3325

3326

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

3327

lambda *args, **kwargs:

3328

(tcp_server.handle_request

3329

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

3330

3472

3473

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

3474

lambda *args, **kwargs:

3475

(tcp_server.handle_request

3476

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

3477

3331

3478

logger.debug("Starting main loop")

3332

3479

main_loop.run()

3333

3480

except AvahiError as error: