/mandos/trunk : revision 841

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#!/usr/bin/python2.7

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#!/usr/bin/python

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

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#

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

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

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#

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# Everything else is

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#

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

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

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from __future__ import (division, absolute_import, print_function,

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unicode_literals)

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from future_builtins import *

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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 argparse

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import datetime

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import errno

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import gnutls.crypto

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import gnutls.connection

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import gnutls.errors

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import gnutls.library.functions

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import gnutls.library.constants

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import gnutls.library.types

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try:

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import ConfigParser as configparser

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except ImportError:

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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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if sys.version_info.major == 2:

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str = unicode

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version = "1.6.9"

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version = "1.7.6"

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stored_state_file = "clients.pickle"

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logger = logging.getLogger()

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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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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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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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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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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()

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class AvahiError(Exception):

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

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logger.error(bad_states[state] + ": %r", error)

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self.cleanup()

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elif state == avahi.SERVER_RUNNING:

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self.add()

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try:

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self.add()

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except dbus.exceptions.DBusException as error:

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if (error.get_dbus_name()

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

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logger.info("Local Zeroconf service name"

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" collision.")

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return self.rename(remove=False)

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else:

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

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self.cleanup()

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os._exit(1)

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else:

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if error is None:

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

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.format(self.name)))

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return ret

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# Pretend that we have a GnuTLS module

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class GnuTLS(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 a GnuTLS module."""

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_library = ctypes.cdll.LoadLibrary(

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ctypes.util.find_library("gnutls"))

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_need_version = b"3.3.0"

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def __init__(self):

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

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

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# happens.

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

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

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.format(self._need_version))

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# Unless otherwise indicated, the constants and types below are

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

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# Constants

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E_SUCCESS = 0

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E_INTERRUPTED = -52

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E_AGAIN = -28

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CRT_OPENPGP = 2

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CLIENT = 2

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SHUT_RDWR = 0

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CRD_CERTIFICATE = 1

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E_NO_CERTIFICATE_FOUND = -49

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OPENPGP_FMT_RAW = 0 # gnutls/openpgp.h

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# Types

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class session_int(ctypes.Structure):

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_fields_ = []

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session_t = ctypes.POINTER(session_int)

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class certificate_credentials_st(ctypes.Structure):

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_fields_ = []

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certificate_credentials_t = ctypes.POINTER(

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certificate_credentials_st)

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certificate_type_t = ctypes.c_int

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class datum_t(ctypes.Structure):

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

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('size', ctypes.c_uint)]

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class openpgp_crt_int(ctypes.Structure):

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_fields_ = []

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openpgp_crt_t = ctypes.POINTER(openpgp_crt_int)

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openpgp_crt_fmt_t = ctypes.c_int # gnutls/openpgp.h

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

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credentials_type_t = ctypes.c_int

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transport_ptr_t = ctypes.c_void_p

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close_request_t = ctypes.c_int

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# Exceptions

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class Error(Exception):

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

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# exception might be raised from within GnuTLS.__init__,

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

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# global variable has happened.

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

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

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# code is passed, convert it to a string with

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# gnutls.strerror()

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self.code = code

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if message is None and code is not None:

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message = GnuTLS.strerror(code)

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

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message, *args)

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class CertificateSecurityError(Error):

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pass

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# Classes

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class Credentials(object):

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def __init__(self):

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self._c_object = gnutls.certificate_credentials_t()

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gnutls.certificate_allocate_credentials(

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ctypes.byref(self._c_object))

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self.type = gnutls.CRD_CERTIFICATE

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def __del__(self):

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gnutls.certificate_free_credentials(self._c_object)

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class ClientSession(object):

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

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self._c_object = gnutls.session_t()

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

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gnutls.set_default_priority(self._c_object)

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gnutls.transport_set_ptr(self._c_object, socket.fileno())

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gnutls.handshake_set_private_extensions(self._c_object,

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True)

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self.socket = socket

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if credentials is None:

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credentials = gnutls.Credentials()

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gnutls.credentials_set(self._c_object, credentials.type,

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ctypes.cast(credentials._c_object,

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ctypes.c_void_p))

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self.credentials = credentials

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def __del__(self):

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gnutls.deinit(self._c_object)

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def handshake(self):

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return gnutls.handshake(self._c_object)

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def send(self, data):

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data = bytes(data)

587

data_len = len(data)

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while data_len > 0:

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data_len -= gnutls.record_send(self._c_object,

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data[-data_len:],

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data_len)

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def bye(self):

594

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

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# Error handling functions

597

def _error_code(result):

598

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

599

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

600

if result >= 0:

601

return result

602

if result == gnutls.E_NO_CERTIFICATE_FOUND:

603

raise gnutls.CertificateSecurityError(code = result)

604

raise gnutls.Error(code = result)

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def _retry_on_error(result, func, arguments):

607

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

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

609

while result < 0:

610

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

611

return _error_code(result)

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result = func(*arguments)

613

return result

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# Unless otherwise indicated, the function declarations below are

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

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# Functions

619

priority_set_direct = _library.gnutls_priority_set_direct

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priority_set_direct.argtypes = [session_t, ctypes.c_char_p,

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ctypes.POINTER(ctypes.c_char_p)]

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priority_set_direct.restype = _error_code

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init = _library.gnutls_init

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

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init.restype = _error_code

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set_default_priority = _library.gnutls_set_default_priority

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set_default_priority.argtypes = [session_t]

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set_default_priority.restype = _error_code

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632

record_send = _library.gnutls_record_send

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record_send.argtypes = [session_t, ctypes.c_void_p,

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ctypes.c_size_t]

635

record_send.restype = ctypes.c_ssize_t

636

record_send.errcheck = _retry_on_error

637

638

certificate_allocate_credentials = (

639

_library.gnutls_certificate_allocate_credentials)

640

certificate_allocate_credentials.argtypes = [

641

ctypes.POINTER(certificate_credentials_t)]

642

certificate_allocate_credentials.restype = _error_code

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644

certificate_free_credentials = (

645

_library.gnutls_certificate_free_credentials)

646

certificate_free_credentials.argtypes = [certificate_credentials_t]

647

certificate_free_credentials.restype = None

648

649

handshake_set_private_extensions = (

650

_library.gnutls_handshake_set_private_extensions)

651

handshake_set_private_extensions.argtypes = [session_t,

652

ctypes.c_int]

653

handshake_set_private_extensions.restype = None

654

655

credentials_set = _library.gnutls_credentials_set

656

credentials_set.argtypes = [session_t, credentials_type_t,

657

ctypes.c_void_p]

658

credentials_set.restype = _error_code

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660

strerror = _library.gnutls_strerror

661

strerror.argtypes = [ctypes.c_int]

662

strerror.restype = ctypes.c_char_p

663

664

certificate_type_get = _library.gnutls_certificate_type_get

665

certificate_type_get.argtypes = [session_t]

666

certificate_type_get.restype = _error_code

667

668

certificate_get_peers = _library.gnutls_certificate_get_peers

669

certificate_get_peers.argtypes = [session_t,

670

ctypes.POINTER(ctypes.c_uint)]

671

certificate_get_peers.restype = ctypes.POINTER(datum_t)

672

673

global_set_log_level = _library.gnutls_global_set_log_level

674

global_set_log_level.argtypes = [ctypes.c_int]

675

global_set_log_level.restype = None

676

677

global_set_log_function = _library.gnutls_global_set_log_function

678

global_set_log_function.argtypes = [log_func]

679

global_set_log_function.restype = None

680

681

deinit = _library.gnutls_deinit

682

deinit.argtypes = [session_t]

683

deinit.restype = None

684

685

handshake = _library.gnutls_handshake

686

handshake.argtypes = [session_t]

687

handshake.restype = _error_code

688

handshake.errcheck = _retry_on_error

689

690

transport_set_ptr = _library.gnutls_transport_set_ptr

691

transport_set_ptr.argtypes = [session_t, transport_ptr_t]

692

transport_set_ptr.restype = None

693

694

bye = _library.gnutls_bye

695

bye.argtypes = [session_t, close_request_t]

696

bye.restype = _error_code

697

bye.errcheck = _retry_on_error

698

699

check_version = _library.gnutls_check_version

700

check_version.argtypes = [ctypes.c_char_p]

701

check_version.restype = ctypes.c_char_p

702

703

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

704

705

openpgp_crt_init = _library.gnutls_openpgp_crt_init

706

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

707

openpgp_crt_init.restype = _error_code

708

709

openpgp_crt_import = _library.gnutls_openpgp_crt_import

710

openpgp_crt_import.argtypes = [openpgp_crt_t,

711

ctypes.POINTER(datum_t),

712

openpgp_crt_fmt_t]

713

openpgp_crt_import.restype = _error_code

714

715

openpgp_crt_verify_self = _library.gnutls_openpgp_crt_verify_self

716

openpgp_crt_verify_self.argtypes = [openpgp_crt_t, ctypes.c_uint,

717

ctypes.POINTER(ctypes.c_uint)]

718

openpgp_crt_verify_self.restype = _error_code

719

720

openpgp_crt_deinit = _library.gnutls_openpgp_crt_deinit

721

openpgp_crt_deinit.argtypes = [openpgp_crt_t]

722

openpgp_crt_deinit.restype = None

723

724

openpgp_crt_get_fingerprint = (

725

_library.gnutls_openpgp_crt_get_fingerprint)

726

openpgp_crt_get_fingerprint.argtypes = [openpgp_crt_t,

727

ctypes.c_void_p,

728

ctypes.POINTER(

729

ctypes.c_size_t)]

730

openpgp_crt_get_fingerprint.restype = _error_code

731

732

# Remove non-public functions

733

del _error_code, _retry_on_error

734

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

735

gnutls = GnuTLS()

736

737

def call_pipe(connection, # : multiprocessing.Connection

738

func, *args, **kwargs):

739

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

740

741

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

742

return value on the provided multiprocessing.Connection.

743

"""

744

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

745

connection.close()

427

746

428

747

class Client(object):

429

748

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

435

754

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

436

755

to see if the client lives.

437

756

'None' if no process is running.

438

checker_callback_tag: a gobject event source tag, or None

757

checker_callback_tag: a GLib event source tag, or None

439

758

checker_command: string; External command which is run to check

440

759

if client lives. %() expansions are done at

441

760

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

442

761

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

443

checker_initiator_tag: a gobject event source tag, or None

762

checker_initiator_tag: a GLib event source tag, or None

444

763

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

445

764

client_structure: Object describing what attributes a client has

446

765

and is used for storing the client at exit

447

766

current_checker_command: string; current running checker_command

448

disable_initiator_tag: a gobject event source tag, or None

767

disable_initiator_tag: a GLib event source tag, or None

449

768

enabled: bool()

450

769

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

451

770

uniquely identify the client

456

775

last_checker_status: integer between 0 and 255 reflecting exit

457

776

status of last checker. -1 reflects crashed

458

777

checker, -2 means no checker completed yet.

778

last_checker_signal: The signal which killed the last checker, if

779

last_checker_status is -1

459

780

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

460

781

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

461

782

D-Bus identifiers

512

833

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

513

834

.replace(" ", ""))

514

835

if "secret" in section:

515

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

836

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

837

.encode("utf-8"),

838

"base64")

516

839

elif "secfile" in section:

517

840

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

518

841

(section["secfile"])),

571

894

self.changedstate = multiprocessing_manager.Condition(

572

895

multiprocessing_manager.Lock())

573

896

self.client_structure = [attr

574

for attr in self.__dict__.iterkeys()

897

for attr in self.__dict__.keys()

575

898

if not attr.startswith("_")]

576

899

self.client_structure.append("client_structure")

577

900

603

926

if not quiet:

604

927

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

605

928

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

606

gobject.source_remove(self.disable_initiator_tag)

929

GLib.source_remove(self.disable_initiator_tag)

607

930

self.disable_initiator_tag = None

608

931

self.expires = None

609

932

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

610

gobject.source_remove(self.checker_initiator_tag)

933

GLib.source_remove(self.checker_initiator_tag)

611

934

self.checker_initiator_tag = None

612

935

self.stop_checker()

613

936

self.enabled = False

614

937

if not quiet:

615

938

self.send_changedstate()

616

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

939

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

617

940

return False

618

941

619

942

def __del__(self):

623

946

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

624

947

# and every interval from then on.

625

948

if self.checker_initiator_tag is not None:

626

gobject.source_remove(self.checker_initiator_tag)

627

self.checker_initiator_tag = gobject.timeout_add(

949

GLib.source_remove(self.checker_initiator_tag)

950

self.checker_initiator_tag = GLib.timeout_add(

628

951

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

629

952

self.start_checker)

630

953

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

631

954

if self.disable_initiator_tag is not None:

632

gobject.source_remove(self.disable_initiator_tag)

633

self.disable_initiator_tag = gobject.timeout_add(

955

GLib.source_remove(self.disable_initiator_tag)

956

self.disable_initiator_tag = GLib.timeout_add(

634

957

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

635

958

# Also start a new checker *right now*.

636

959

self.start_checker()

637

960

638

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

961

def checker_callback(self, source, condition, connection,

962

command):

639

963

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

640

964

self.checker_callback_tag = None

641

965

self.checker = None

642

if os.WIFEXITED(condition):

643

self.last_checker_status = os.WEXITSTATUS(condition)

966

# Read return code from connection (see call_pipe)

967

returncode = connection.recv()

968

connection.close()

969

970

if returncode >= 0:

971

self.last_checker_status = returncode

972

self.last_checker_signal = None

644

973

if self.last_checker_status == 0:

645

974

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

646

975

vars(self))

649

978

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

650

979

else:

651

980

self.last_checker_status = -1

981

self.last_checker_signal = -returncode

652

982

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

653

983

vars(self))

984

return False

654

985

655

986

def checked_ok(self):

656

987

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

657

988

self.last_checked_ok = datetime.datetime.utcnow()

658

989

self.last_checker_status = 0

990

self.last_checker_signal = None

659

991

self.bump_timeout()

660

992

661

993

def bump_timeout(self, timeout=None):

663

995

if timeout is None:

664

996

timeout = self.timeout

665

997

if self.disable_initiator_tag is not None:

666

gobject.source_remove(self.disable_initiator_tag)

998

GLib.source_remove(self.disable_initiator_tag)

667

999

self.disable_initiator_tag = None

668

1000

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

669

self.disable_initiator_tag = gobject.timeout_add(

1001

self.disable_initiator_tag = GLib.timeout_add(

670

1002

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

671

1003

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

672

1004

687

1019

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

688

1020

# should be.

689

1021

690

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

691

try:

692

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

693

except AttributeError:

694

pass

695

except OSError as error:

696

if error.errno != errno.ECHILD:

697

raise

698

else:

699

if pid:

700

logger.warning("Checker was a zombie")

701

gobject.source_remove(self.checker_callback_tag)

702

self.checker_callback(pid, status,

703

self.current_checker_command)

1022

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

1023

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

1024

self.checker.join()

1025

self.checker = None

704

1026

# Start a new checker if needed

705

1027

if self.checker is None:

706

1028

# Escape attributes for the shell

715

1037

exc_info=error)

716

1038

return True # Try again later

717

1039

self.current_checker_command = command

718

try:

719

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

720

self.name)

721

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

722

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

723

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

724

# always replaced by /dev/null.)

725

# The exception is when not debugging but nevertheless

726

# running in the foreground; use the previously

727

# created wnull.

728

popen_args = {}

729

if (not self.server_settings["debug"]

730

and self.server_settings["foreground"]):

731

popen_args.update({"stdout": wnull,

732

"stderr": wnull })

733

self.checker = subprocess.Popen(command,

734

close_fds=True,

735

shell=True,

736

cwd="/",

737

**popen_args)

738

except OSError as error:

739

logger.error("Failed to start subprocess",

740

exc_info=error)

741

return True

742

self.checker_callback_tag = gobject.child_watch_add(

743

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

744

# The checker may have completed before the gobject

745

# watch was added. Check for this.

746

try:

747

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

748

except OSError as error:

749

if error.errno == errno.ECHILD:

750

# This should never happen

751

logger.error("Child process vanished",

752

exc_info=error)

753

return True

754

raise

755

if pid:

756

gobject.source_remove(self.checker_callback_tag)

757

self.checker_callback(pid, status, command)

758

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

1040

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

1041

self.name)

1042

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

1043

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

1044

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

1045

# always replaced by /dev/null.)

1046

# The exception is when not debugging but nevertheless

1047

# running in the foreground; use the previously

1048

# created wnull.

1049

popen_args = { "close_fds": True,

1050

"shell": True,

1051

"cwd": "/" }

1052

if (not self.server_settings["debug"]

1053

and self.server_settings["foreground"]):

1054

popen_args.update({"stdout": wnull,

1055

"stderr": wnull })

1056

pipe = multiprocessing.Pipe(duplex = False)

1057

self.checker = multiprocessing.Process(

1058

target = call_pipe,

1059

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

1060

kwargs = popen_args)

1061

self.checker.start()

1062

self.checker_callback_tag = GLib.io_add_watch(

1063

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

1064

self.checker_callback, pipe[0], command)

1065

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

759

1066

return True

760

1067

761

1068

def stop_checker(self):

762

1069

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

763

1070

if self.checker_callback_tag:

764

gobject.source_remove(self.checker_callback_tag)

1071

GLib.source_remove(self.checker_callback_tag)

765

1072

self.checker_callback_tag = None

766

1073

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

767

1074

return

768

1075

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

769

try:

770

self.checker.terminate()

771

#time.sleep(0.5)

772

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

773

# self.checker.kill()

774

except OSError as error:

775

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

776

raise

1076

self.checker.terminate()

777

1077

self.checker = None

778

1078

779

1079

843

1143

access="r")

844

1144

def Property_dbus_property(self):

845

1145

return dbus.Boolean(False)

1146

1147

See also the DBusObjectWithAnnotations class.

846

1148

"""

847

1149

848

1150

def decorator(func):

870

1172

pass

871

1173

872

1174

873

class DBusObjectWithProperties(dbus.service.Object):

874

"""A D-Bus object with properties.

1175

class DBusObjectWithAnnotations(dbus.service.Object):

1176

"""A D-Bus object with annotations.

875

1177

876

Classes inheriting from this can use the dbus_service_property

877

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

878

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

1178

Classes inheriting from this can use the dbus_annotations

1179

decorator to add annotations to methods or signals.

879

1180

"""

880

1181

881

1182

@staticmethod

897

1198

for name, athing in

898

1199

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

899

1200

1201

@dbus.service.method(dbus.INTROSPECTABLE_IFACE,

1202

out_signature = "s",

1203

path_keyword = 'object_path',

1204

connection_keyword = 'connection')

1205

def Introspect(self, object_path, connection):

1206

"""Overloading of standard D-Bus method.

1207

1208

Inserts annotation tags on methods and signals.

1209

"""

1210

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

1211

connection)

1212

try:

1213

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

1214

1215

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

1216

# Add annotation tags

1217

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

1218

for tag in if_tag.getElementsByTagName(typ):

1219

annots = dict()

1220

for name, prop in (self.

1221

_get_all_dbus_things(typ)):

1222

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

1223

and prop._dbus_interface

1224

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

1225

annots.update(getattr(

1226

prop, "_dbus_annotations", {}))

1227

for name, value in annots.items():

1228

ann_tag = document.createElement(

1229

"annotation")

1230

ann_tag.setAttribute("name", name)

1231

ann_tag.setAttribute("value", value)

1232

tag.appendChild(ann_tag)

1233

# Add interface annotation tags

1234

for annotation, value in dict(

1235

itertools.chain.from_iterable(

1236

annotations().items()

1237

for name, annotations

1238

in self._get_all_dbus_things("interface")

1239

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

1240

)).items():

1241

ann_tag = document.createElement("annotation")

1242

ann_tag.setAttribute("name", annotation)

1243

ann_tag.setAttribute("value", value)

1244

if_tag.appendChild(ann_tag)

1245

# Fix argument name for the Introspect method itself

1246

if (if_tag.getAttribute("name")

1247

== dbus.INTROSPECTABLE_IFACE):

1248

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

1249

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

1250

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

1251

if (arg.getAttribute("direction")

1252

== "out"):

1253

arg.setAttribute("name",

1254

"xml_data")

1255

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

1256

document.unlink()

1257

except (AttributeError, xml.dom.DOMException,

1258

xml.parsers.expat.ExpatError) as error:

1259

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

1260

exc_info=error)

1261

return xmlstring

1262

1263

1264

class DBusObjectWithProperties(DBusObjectWithAnnotations):

1265

"""A D-Bus object with properties.

1266

1267

Classes inheriting from this can use the dbus_service_property

1268

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

1269

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

1270

"""

1271

900

1272

def _get_dbus_property(self, interface_name, property_name):

901

1273

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

902

1274

property with the specified name and interface.

912

1284

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

913

1285

self.dbus_object_path, interface_name, property_name))

914

1286

1287

@classmethod

1288

def _get_all_interface_names(cls):

1289

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

1290

return (name for name in set(getattr(getattr(x, attr),

1291

"_dbus_interface", None)

1292

for x in (inspect.getmro(cls))

1293

for attr in dir(x))

1294

if name is not None)

1295

915

1296

@dbus.service.method(dbus.PROPERTIES_IFACE,

916

1297

in_signature="ss",

917

1298

out_signature="v")

987

1368

988

1369

Inserts property tags and interface annotation tags.

989

1370

"""

990

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

991

connection)

1371

xmlstring = DBusObjectWithAnnotations.Introspect(self,

1372

object_path,

1373

connection)

992

1374

try:

993

1375

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

994

1376

1007

1389

if prop._dbus_interface

1008

1390

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

1009

1391

if_tag.appendChild(tag)

1010

# Add annotation tags

1011

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

1012

for tag in if_tag.getElementsByTagName(typ):

1013

annots = dict()

1014

for name, prop in (self.

1015

_get_all_dbus_things(typ)):

1016

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

1017

and prop._dbus_interface

1018

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

1019

annots.update(getattr(

1020

prop, "_dbus_annotations", {}))

1021

for name, value in annots.items():

1022

ann_tag = document.createElement(

1023

"annotation")

1024

ann_tag.setAttribute("name", name)

1025

ann_tag.setAttribute("value", value)

1026

tag.appendChild(ann_tag)

1027

# Add interface annotation tags

1028

for annotation, value in dict(

1029

itertools.chain.from_iterable(

1030

annotations().items()

1031

for name, annotations

1032

in self._get_all_dbus_things("interface")

1033

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

1034

)).items():

1035

ann_tag = document.createElement("annotation")

1036

ann_tag.setAttribute("name", annotation)

1037

ann_tag.setAttribute("value", value)

1038

if_tag.appendChild(ann_tag)

1392

# Add annotation tags for properties

1393

for tag in if_tag.getElementsByTagName("property"):

1394

annots = dict()

1395

for name, prop in self._get_all_dbus_things(

1396

"property"):

1397

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

1398

and prop._dbus_interface

1399

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

1400

annots.update(getattr(

1401

prop, "_dbus_annotations", {}))

1402

for name, value in annots.items():

1403

ann_tag = document.createElement(

1404

"annotation")

1405

ann_tag.setAttribute("name", name)

1406

ann_tag.setAttribute("value", value)

1407

tag.appendChild(ann_tag)

1039

1408

# Add the names to the return values for the

1040

1409

# "org.freedesktop.DBus.Properties" methods

1041

1410

if (if_tag.getAttribute("name")

1059

1428

exc_info=error)

1060

1429

return xmlstring

1061

1430

1431

try:

1432

dbus.OBJECT_MANAGER_IFACE

1433

except AttributeError:

1434

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

1435

1436

class DBusObjectWithObjectManager(DBusObjectWithAnnotations):

1437

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

1438

1439

Classes inheriting from this exposes the standard

1440

GetManagedObjects call and the InterfacesAdded and

1441

InterfacesRemoved signals on the standard

1442

"org.freedesktop.DBus.ObjectManager" interface.

1443

1444

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

1445

manually.

1446

"""

1447

@dbus.service.method(dbus.OBJECT_MANAGER_IFACE,

1448

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

1449

def GetManagedObjects(self):

1450

"""This function must be overridden"""

1451

raise NotImplementedError()

1452

1453

@dbus.service.signal(dbus.OBJECT_MANAGER_IFACE,

1454

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

1455

def InterfacesAdded(self, object_path, interfaces_and_properties):

1456

pass

1457

1458

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

1459

def InterfacesRemoved(self, object_path, interfaces):

1460

pass

1461

1462

@dbus.service.method(dbus.INTROSPECTABLE_IFACE,

1463

out_signature = "s",

1464

path_keyword = 'object_path',

1465

connection_keyword = 'connection')

1466

def Introspect(self, object_path, connection):

1467

"""Overloading of standard D-Bus method.

1468

1469

Override return argument name of GetManagedObjects to be

1470

"objpath_interfaces_and_properties"

1471

"""

1472

xmlstring = DBusObjectWithAnnotations.Introspect(self,

1473

object_path,

1474

connection)

1475

try:

1476

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

1477

1478

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

1479

# Fix argument name for the GetManagedObjects method

1480

if (if_tag.getAttribute("name")

1481

== dbus.OBJECT_MANAGER_IFACE):

1482

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

1483

if (cn.getAttribute("name")

1484

== "GetManagedObjects"):

1485

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

1486

if (arg.getAttribute("direction")

1487

== "out"):

1488

arg.setAttribute(

1489

"name",

1490

"objpath_interfaces"

1491

"_and_properties")

1492

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

1493

document.unlink()

1494

except (AttributeError, xml.dom.DOMException,

1495

xml.parsers.expat.ExpatError) as error:

1496

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

1497

exc_info = error)

1498

return xmlstring

1062

1499

1063

1500

def datetime_to_dbus(dt, variant_level=0):

1064

1501

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

1113

1550

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

1114

1551

# Extract the original non-method undecorated

1115

1552

# function by black magic

1116

nonmethod_func = (dict(

1117

zip(attribute.func_code.co_freevars,

1118

attribute.__closure__))

1119

["func"].cell_contents)

1553

if sys.version_info.major == 2:

1554

nonmethod_func = (dict(

1555

zip(attribute.func_code.co_freevars,

1556

attribute.__closure__))

1557

["func"].cell_contents)

1558

else:

1559

nonmethod_func = (dict(

1560

zip(attribute.__code__.co_freevars,

1561

attribute.__closure__))

1562

["func"].cell_contents)

1120

1563

# Create a new, but exactly alike, function

1121

1564

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

1122

1565

# with the alternate D-Bus interface name

1566

new_function = copy_function(nonmethod_func)

1123

1567

new_function = (dbus.service.signal(

1124

alt_interface, attribute._dbus_signature)

1125

(types.FunctionType(

1126

nonmethod_func.func_code,

1127

nonmethod_func.func_globals,

1128

nonmethod_func.func_name,

1129

nonmethod_func.func_defaults,

1130

nonmethod_func.func_closure)))

1568

alt_interface,

1569

attribute._dbus_signature)(new_function))

1131

1570

# Copy annotations, if any

1132

1571

try:

1133

1572

new_function._dbus_annotations = dict(

1143

1582

func1 and func2 to the "call_both" function

1144

1583

outside of its arguments"""

1145

1584

1585

@functools.wraps(func2)

1146

1586

def call_both(*args, **kwargs):

1147

1587

"""This function will emit two D-Bus

1148

1588

signals by calling func1 and func2"""

1149

1589

func1(*args, **kwargs)

1150

1590

func2(*args, **kwargs)

1591

# Make wrapper function look like a D-Bus signal

1592

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

1593

if name.startswith("_dbus_"):

1594

setattr(call_both, name, attr)

1151

1595

1152

1596

return call_both

1153

1597

# Create the "call_both" function and add it to

1164

1608

alt_interface,

1165

1609

attribute._dbus_in_signature,

1166

1610

attribute._dbus_out_signature)

1167

(types.FunctionType(attribute.func_code,

1168

attribute.func_globals,

1169

attribute.func_name,

1170

attribute.func_defaults,

1171

attribute.func_closure)))

1611

(copy_function(attribute)))

1172

1612

# Copy annotations, if any

1173

1613

try:

1174

1614

attr[attrname]._dbus_annotations = dict(

1186

1626

attribute._dbus_access,

1187

1627

attribute._dbus_get_args_options

1188

1628

["byte_arrays"])

1189

(types.FunctionType(

1190

attribute.func_code,

1191

attribute.func_globals,

1192

attribute.func_name,

1193

attribute.func_defaults,

1194

attribute.func_closure)))

1629

(copy_function(attribute)))

1195

1630

# Copy annotations, if any

1196

1631

try:

1197

1632

attr[attrname]._dbus_annotations = dict(

1206

1641

# to the class.

1207

1642

attr[attrname] = (

1208

1643

dbus_interface_annotations(alt_interface)

1209

(types.FunctionType(attribute.func_code,

1210

attribute.func_globals,

1211

attribute.func_name,

1212

attribute.func_defaults,

1213

attribute.func_closure)))

1644

(copy_function(attribute)))

1214

1645

if deprecate:

1215

1646

# Deprecate all alternate interfaces

1216

1647

iname="_AlternateDBusNames_interface_annotation{}"

1229

1660

if interface_names:

1230

1661

# Replace the class with a new subclass of it with

1231

1662

# methods, signals, etc. as created above.

1232

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

1233

(cls, ), attr)

1663

if sys.version_info.major == 2:

1664

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

1665

(cls, ), attr)

1666

else:

1667

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

1668

(cls, ), attr)

1234

1669

return cls

1235

1670

1236

1671

return wrapper

1356

1791

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

1357

1792

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

1358

1793

1359

def checker_callback(self, pid, condition, command,

1360

*args, **kwargs):

1361

self.checker_callback_tag = None

1362

self.checker = None

1363

if os.WIFEXITED(condition):

1364

exitstatus = os.WEXITSTATUS(condition)

1794

def checker_callback(self, source, condition,

1795

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

1796

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

1797

connection, command, *args,

1798

**kwargs)

1799

exitstatus = self.last_checker_status

1800

if exitstatus >= 0:

1365

1801

# Emit D-Bus signal

1366

1802

self.CheckerCompleted(dbus.Int16(exitstatus),

1367

dbus.Int64(condition),

1803

# This is specific to GNU libC

1804

dbus.Int64(exitstatus << 8),

1368

1805

dbus.String(command))

1369

1806

else:

1370

1807

# Emit D-Bus signal

1371

1808

self.CheckerCompleted(dbus.Int16(-1),

1372

dbus.Int64(condition),

1809

dbus.Int64(

1810

# This is specific to GNU libC

1811

(exitstatus << 8)

1812

| self.last_checker_signal),

1373

1813

dbus.String(command))

1374

1375

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

1376

*args, **kwargs)

1814

return ret

1377

1815

1378

1816

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

1379

1817

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

1391

1829

1392

1830

def approve(self, value=True):

1393

1831

self.approved = value

1394

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

1395

* 1000), self._reset_approved)

1832

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

1833

* 1000), self._reset_approved)

1396

1834

self.send_changedstate()

1397

1835

1398

1836

## D-Bus methods, signals & properties

1454

1892

self.checked_ok()

1455

1893

1456

1894

# Enable - method

1895

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

1457

1896

@dbus.service.method(_interface)

1458

1897

def Enable(self):

1459

1898

"D-Bus method"

1460

1899

self.enable()

1461

1900

1462

1901

# StartChecker - method

1902

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

1463

1903

@dbus.service.method(_interface)

1464

1904

def StartChecker(self):

1465

1905

"D-Bus method"

1466

1906

self.start_checker()

1467

1907

1468

1908

# Disable - method

1909

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

1469

1910

@dbus.service.method(_interface)

1470

1911

def Disable(self):

1471

1912

"D-Bus method"

1472

1913

self.disable()

1473

1914

1474

1915

# StopChecker - method

1916

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

1475

1917

@dbus.service.method(_interface)

1476

1918

def StopChecker(self):

1477

1919

self.stop_checker()

1513

1955

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

1514

1956

1515

1957

# Name - property

1958

@dbus_annotations(

1959

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

1516

1960

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

1517

1961

def Name_dbus_property(self):

1518

1962

return dbus.String(self.name)

1519

1963

1520

1964

# Fingerprint - property

1965

@dbus_annotations(

1966

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

1521

1967

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

1522

1968

def Fingerprint_dbus_property(self):

1523

1969

return dbus.String(self.fingerprint)

1532

1978

self.host = str(value)

1533

1979

1534

1980

# Created - property

1981

@dbus_annotations(

1982

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

1535

1983

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

1536

1984

def Created_dbus_property(self):

1537

1985

return datetime_to_dbus(self.created)

1598

2046

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

1599

2047

is None):

1600

2048

return

1601

gobject.source_remove(self.disable_initiator_tag)

1602

self.disable_initiator_tag = gobject.timeout_add(

2049

GLib.source_remove(self.disable_initiator_tag)

2050

self.disable_initiator_tag = GLib.timeout_add(

1603

2051

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

1604

2052

self.disable)

1605

2053

1625

2073

return

1626

2074

if self.enabled:

1627

2075

# Reschedule checker run

1628

gobject.source_remove(self.checker_initiator_tag)

1629

self.checker_initiator_tag = gobject.timeout_add(

2076

GLib.source_remove(self.checker_initiator_tag)

2077

self.checker_initiator_tag = GLib.timeout_add(

1630

2078

value, self.start_checker)

1631

2079

self.start_checker() # Start one now, too

1632

2080

1652

2100

self.stop_checker()

1653

2101

1654

2102

# ObjectPath - property

2103

@dbus_annotations(

2104

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

2105

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

1655

2106

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

1656

2107

def ObjectPath_dbus_property(self):

1657

2108

return self.dbus_object_path # is already a dbus.ObjectPath

1658

2109

1659

2110

# Secret = property

2111

@dbus_annotations(

2112

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

2113

"invalidates"})

1660

2114

@dbus_service_property(_interface,

1661

2115

signature="ay",

1662

2116

access="write",

1708

2162

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

1709

2163

self.server.child_pipe.fileno())

1710

2164

1711

session = gnutls.connection.ClientSession(

1712

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

1713

1714

# Note: gnutls.connection.X509Credentials is really a

1715

# generic GnuTLS certificate credentials object so long as

1716

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

1717

# here despite using OpenPGP certificates.

2165

session = gnutls.ClientSession(self.request)

1718

2166

1719

2167

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

1720

2168

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

1724

2172

priority = self.server.gnutls_priority

1725

2173

if priority is None:

1726

2174

priority = "NORMAL"

1727

gnutls.library.functions.gnutls_priority_set_direct(

1728

session._c_object, priority, None)

2175

gnutls.priority_set_direct(session._c_object, priority,

2176

None)

1729

2177

1730

2178

# Start communication using the Mandos protocol

1731

2179

# Get protocol number

1741

2189

# Start GnuTLS connection

1742

2190

try:

1743

2191

session.handshake()

1744

except gnutls.errors.GNUTLSError as error:

2192

except gnutls.Error as error:

1745

2193

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

1746

2194

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

1747

2195

# established. Just abandon the request.

1753

2201

try:

1754

2202

fpr = self.fingerprint(

1755

2203

self.peer_certificate(session))

1756

except (TypeError,

1757

gnutls.errors.GNUTLSError) as error:

2204

except (TypeError, gnutls.Error) as error:

1758

2205

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

1759

2206

return

1760

2207

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

1818

2265

else:

1819

2266

delay -= time2 - time

1820

2267

1821

sent_size = 0

1822

while sent_size < len(client.secret):

1823

try:

1824

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

1825

except gnutls.errors.GNUTLSError as error:

1826

logger.warning("gnutls send failed",

1827

exc_info=error)

1828

return

1829

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

1830

len(client.secret) - (sent_size

1831

+ sent))

1832

sent_size += sent

2268

try:

2269

session.send(client.secret)

2270

except gnutls.Error as error:

2271

logger.warning("gnutls send failed",

2272

exc_info = error)

2273

return

1833

2274

1834

2275

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

1835

2276

# bump the timeout using extended_timeout

1843

2284

client.approvals_pending -= 1

1844

2285

try:

1845

2286

session.bye()

1846

except gnutls.errors.GNUTLSError as error:

2287

except gnutls.Error as error:

1847

2288

logger.warning("GnuTLS bye failed",

1848

2289

exc_info=error)

1849

2290

1851

2292

def peer_certificate(session):

1852

2293

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

1853

2294

# If not an OpenPGP certificate...

1854

if (gnutls.library.functions.gnutls_certificate_type_get(

1855

session._c_object)

1856

!= gnutls.library.constants.GNUTLS_CRT_OPENPGP):

1857

# ...do the normal thing

1858

return session.peer_certificate

2295

if (gnutls.certificate_type_get(session._c_object)

2296

!= gnutls.CRT_OPENPGP):

2297

# ...return invalid data

2298

return b""

1859

2299

list_size = ctypes.c_uint(1)

1860

cert_list = (gnutls.library.functions

1861

.gnutls_certificate_get_peers

2300

cert_list = (gnutls.certificate_get_peers

1862

2301

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

1863

2302

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

1864

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

1865

" certificate")

2303

raise gnutls.Error("error getting peer certificate")

1866

2304

if list_size.value == 0:

1867

2305

return None

1868

2306

cert = cert_list[0]

1872

2310

def fingerprint(openpgp):

1873

2311

"Convert an OpenPGP bytestring to a hexdigit fingerprint"

1874

2312

# New GnuTLS "datum" with the OpenPGP public key

1875

datum = gnutls.library.types.gnutls_datum_t(

2313

datum = gnutls.datum_t(

1876

2314

ctypes.cast(ctypes.c_char_p(openpgp),

1877

2315

ctypes.POINTER(ctypes.c_ubyte)),

1878

2316

ctypes.c_uint(len(openpgp)))

1879

2317

# New empty GnuTLS certificate

1880

crt = gnutls.library.types.gnutls_openpgp_crt_t()

1881

gnutls.library.functions.gnutls_openpgp_crt_init(

1882

ctypes.byref(crt))

2318

crt = gnutls.openpgp_crt_t()

2319

gnutls.openpgp_crt_init(ctypes.byref(crt))

1883

2320

# Import the OpenPGP public key into the certificate

1884

gnutls.library.functions.gnutls_openpgp_crt_import(

1885

crt, ctypes.byref(datum),

1886

gnutls.library.constants.GNUTLS_OPENPGP_FMT_RAW)

2321

gnutls.openpgp_crt_import(crt, ctypes.byref(datum),

2322

gnutls.OPENPGP_FMT_RAW)

1887

2323

# Verify the self signature in the key

1888

2324

crtverify = ctypes.c_uint()

1889

gnutls.library.functions.gnutls_openpgp_crt_verify_self(

1890

crt, 0, ctypes.byref(crtverify))

2325

gnutls.openpgp_crt_verify_self(crt, 0,

2326

ctypes.byref(crtverify))

1891

2327

if crtverify.value != 0:

1892

gnutls.library.functions.gnutls_openpgp_crt_deinit(crt)

1893

raise gnutls.errors.CertificateSecurityError(

1894

"Verify failed")

2328

gnutls.openpgp_crt_deinit(crt)

2329

raise gnutls.CertificateSecurityError("Verify failed")

1895

2330

# New buffer for the fingerprint

1896

2331

buf = ctypes.create_string_buffer(20)

1897

2332

buf_len = ctypes.c_size_t()

1898

2333

# Get the fingerprint from the certificate into the buffer

1899

gnutls.library.functions.gnutls_openpgp_crt_get_fingerprint(

1900

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

2334

gnutls.openpgp_crt_get_fingerprint(crt, ctypes.byref(buf),

2335

ctypes.byref(buf_len))

1901

2336

# Deinit the certificate

1902

gnutls.library.functions.gnutls_openpgp_crt_deinit(crt)

2337

gnutls.openpgp_crt_deinit(crt)

1903

2338

# Convert the buffer to a Python bytestring

1904

2339

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

1905

2340

# Convert the bytestring to hexadecimal notation

2049

2484

gnutls_priority GnuTLS priority string

2050

2485

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

2051

2486

2052

Assumes a gobject.MainLoop event loop.

2487

Assumes a GLib.MainLoop event loop.

2053

2488

"""

2054

2489

2055

2490

def __init__(self, server_address, RequestHandlerClass,

2080

2515

2081

2516

def add_pipe(self, parent_pipe, proc):

2082

2517

# Call "handle_ipc" for both data and EOF events

2083

gobject.io_add_watch(

2518

GLib.io_add_watch(

2084

2519

parent_pipe.fileno(),

2085

gobject.IO_IN | gobject.IO_HUP,

2520

GLib.IO_IN | GLib.IO_HUP,

2086

2521

functools.partial(self.handle_ipc,

2087

2522

parent_pipe = parent_pipe,

2088

2523

proc = proc))

2092

2527

proc = None,

2093

2528

client_object=None):

2094

2529

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

2095

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

2530

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

2096

2531

# Wait for other process to exit

2097

2532

proc.join()

2098

2533

return False

2105

2540

fpr = request[1]

2106

2541

address = request[2]

2107

2542

2108

for c in self.clients.itervalues():

2543

for c in self.clients.values():

2109

2544

if c.fingerprint == fpr:

2110

2545

client = c

2111

2546

break

2119

2554

parent_pipe.send(False)

2120

2555

return False

2121

2556

2122

gobject.io_add_watch(

2557

GLib.io_add_watch(

2123

2558

parent_pipe.fileno(),

2124

gobject.IO_IN | gobject.IO_HUP,

2559

GLib.IO_IN | GLib.IO_HUP,

2125

2560

functools.partial(self.handle_ipc,

2126

2561

parent_pipe = parent_pipe,

2127

2562

proc = proc,

2141

2576

2142

2577

if command == 'getattr':

2143

2578

attrname = request[1]

2144

if callable(client_object.__getattribute__(attrname)):

2579

if isinstance(client_object.__getattribute__(attrname),

2580

collections.Callable):

2145

2581

parent_pipe.send(('function', ))

2146

2582

else:

2147

2583

parent_pipe.send((

2182

2618

# avoid excessive use of external libraries.

2183

2619

2184

2620

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

2185

Token = collections.namedtuple("Token",

2186

("regexp", # To match token; if

2187

# "value" is not None,

2188

# must have a "group"

2189

# containing digits

2190

"value", # datetime.timedelta or

2191

# None

2192

"followers")) # Tokens valid after

2193

# this token

2194

2621

Token = collections.namedtuple("Token", (

2195

2622

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

2196

2623

# a "group" containing digits

2231

2658

# Define starting values

2232

2659

value = datetime.timedelta() # Value so far

2233

2660

found_token = None

2234

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

2661

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

2235

2662

s = duration # String left to parse

2236

2663

# Loop until end token is found

2237

2664

while found_token is not token_end:

2394

2821

"debug": "False",

2395

2822

"priority":

2396

2823

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

2397

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

2824

":+SIGN-DSA-SHA256",

2398

2825

"servicename": "Mandos",

2399

2826

"use_dbus": "True",

2400

2827

"use_ipv6": "True",

2517

2944

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

2518

2945

exc_info=e)

2519

2946

2520

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

2947

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

2948

("mandos", "mandos"),

2949

("nobody", "nogroup")):

2521

2950

try:

2522

2951

uid = pwd.getpwnam(name).pw_uid

2523

gid = pwd.getpwnam(name).pw_gid

2952

gid = pwd.getpwnam(group).pw_gid

2524

2953

break

2525

2954

except KeyError:

2526

2955

continue

2530

2959

try:

2531

2960

os.setgid(gid)

2532

2961

os.setuid(uid)

2962

if debug:

2963

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

2964

gid))

2533

2965

except OSError as error:

2966

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

2967

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

2534

2968

if error.errno != errno.EPERM:

2535

2969

raise

2536

2970

2539

2973

2540

2974

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

2541

2975

# - GnuTLS manual

2542

gnutls.library.functions.gnutls_global_set_log_level(11)

2976

gnutls.global_set_log_level(11)

2543

2977

2544

@gnutls.library.types.gnutls_log_func

2978

@gnutls.log_func

2545

2979

def debug_gnutls(level, string):

2546

2980

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

2547

2981

2548

gnutls.library.functions.gnutls_global_set_log_function(

2549

debug_gnutls)

2982

gnutls.global_set_log_function(debug_gnutls)

2550

2983

2551

2984

# Redirect stdin so all checkers get /dev/null

2552

2985

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

2559

2992

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

2560

2993

daemon()

2561

2994

2562

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

2563

# need to inform gobject that threads will be used.

2564

gobject.threads_init()

2995

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

2996

# to inform GLib that threads will be used.

2997

GLib.threads_init()

2565

2998

2566

2999

global main_loop

2567

3000

# From the Avahi example code

2568

3001

DBusGMainLoop(set_as_default=True)

2569

main_loop = gobject.MainLoop()

3002

main_loop = GLib.MainLoop()

2570

3003

bus = dbus.SystemBus()

2571

3004

# End of Avahi example code

2572

3005

if use_dbus:

2616

3049

if server_settings["restore"]:

2617

3050

try:

2618

3051

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

2619

clients_data, old_client_settings = pickle.load(

2620

stored_state)

3052

if sys.version_info.major == 2:

3053

clients_data, old_client_settings = pickle.load(

3054

stored_state)

3055

else:

3056

bytes_clients_data, bytes_old_client_settings = (

3057

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

3058

### Fix bytes to strings

3059

## clients_data

3060

# .keys()

3061

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

3062

if isinstance(key, bytes)

3063

else key): value

3064

for key, value in

3065

bytes_clients_data.items() }

3066

del bytes_clients_data

3067

for key in clients_data:

3068

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

3069

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

3070

for k, v in

3071

clients_data[key].items() }

3072

clients_data[key] = value

3073

# .client_structure

3074

value["client_structure"] = [

3075

(s.decode("utf-8")

3076

if isinstance(s, bytes)

3077

else s) for s in

3078

value["client_structure"] ]

3079

# .name & .host

3080

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

3081

if isinstance(value[k], bytes):

3082

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

3083

## old_client_settings

3084

# .keys()

3085

old_client_settings = {

3086

(key.decode("utf-8")

3087

if isinstance(key, bytes)

3088

else key): value

3089

for key, value in

3090

bytes_old_client_settings.items() }

3091

del bytes_old_client_settings

3092

# .host

3093

for value in old_client_settings.values():

3094

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

3095

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

3096

.decode("utf-8"))

2621

3097

os.remove(stored_state_path)

2622

3098

except IOError as e:

2623

3099

if e.errno == errno.ENOENT:

2656

3132

pass

2657

3133

2658

3134

# Clients who has passed its expire date can still be

2659

# enabled if its last checker was successful. Clients

3135

# enabled if its last checker was successful. A Client

2660

3136

# whose checker succeeded before we stored its state is

2661

3137

# assumed to have successfully run all checkers during

2662

3138

# downtime.

2724

3200

del pidfile

2725

3201

del pidfilename

2726

3202

2727

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

2728

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

3203

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

3204

GLib.unix_signal_add(GLib.PRIORITY_HIGH, termsig,

3205

lambda: main_loop.quit() and False)

2729

3206

2730

3207

if use_dbus:

2731

3208

2732

3209

@alternate_dbus_interfaces(

2733

3210

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

2734

class MandosDBusService(DBusObjectWithProperties):

3211

class MandosDBusService(DBusObjectWithObjectManager):

2735

3212

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

2736

3213

2737

3214

def __init__(self):

2739

3216

2740

3217

_interface = "se.recompile.Mandos"

2741

3218

2742

@dbus_interface_annotations(_interface)

2743

def _foo(self):

2744

return {

2745

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

2746

"false" }

2747

2748

3219

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

2749

3220

def ClientAdded(self, objpath):

2750

3221

"D-Bus signal"

2755

3226

"D-Bus signal"

2756

3227

pass

2757

3228

3229

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

3230

"true"})

2758

3231

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

2759

3232

def ClientRemoved(self, objpath, name):

2760

3233

"D-Bus signal"

2761

3234

pass

2762

3235

3236

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

3237

"true"})

2763

3238

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

2764

3239

def GetAllClients(self):

2765

3240

"D-Bus method"

2766

3241

return dbus.Array(c.dbus_object_path for c in

2767

tcp_server.clients.itervalues())

3242

tcp_server.clients.values())

2768

3243

3244

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

3245

"true"})

2769

3246

@dbus.service.method(_interface,

2770

3247

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

2771

3248

def GetAllClientsWithProperties(self):

2772

3249

"D-Bus method"

2773

3250

return dbus.Dictionary(

2774

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

2775

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

3251

{ c.dbus_object_path: c.GetAll(

3252

"se.recompile.Mandos.Client")

3253

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

2776

3254

signature="oa{sv}")

2777

3255

2778

3256

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

2779

3257

def RemoveClient(self, object_path):

2780

3258

"D-Bus method"

2781

for c in tcp_server.clients.itervalues():

3259

for c in tcp_server.clients.values():

2782

3260

if c.dbus_object_path == object_path:

2783

3261

del tcp_server.clients[c.name]

2784

3262

c.remove_from_connection()

2785

# Don't signal anything except ClientRemoved

3263

# Don't signal the disabling

2786

3264

c.disable(quiet=True)

2787

# Emit D-Bus signal

2788

self.ClientRemoved(object_path, c.name)

3265

# Emit D-Bus signal for removal

3266

self.client_removed_signal(c)

2789

3267

return

2790

3268

raise KeyError(object_path)

2791

3269

2792

3270

del _interface

3271

3272

@dbus.service.method(dbus.OBJECT_MANAGER_IFACE,

3273

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

3274

def GetManagedObjects(self):

3275

"""D-Bus method"""

3276

return dbus.Dictionary(

3277

{ client.dbus_object_path:

3278

dbus.Dictionary(

3279

{ interface: client.GetAll(interface)

3280

for interface in

3281

client._get_all_interface_names()})

3282

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

3283

3284

def client_added_signal(self, client):

3285

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

3286

if use_dbus:

3287

# New standard signal

3288

self.InterfacesAdded(

3289

client.dbus_object_path,

3290

dbus.Dictionary(

3291

{ interface: client.GetAll(interface)

3292

for interface in

3293

client._get_all_interface_names()}))

3294

# Old signal

3295

self.ClientAdded(client.dbus_object_path)

3296

3297

def client_removed_signal(self, client):

3298

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

3299

if use_dbus:

3300

# New standard signal

3301

self.InterfacesRemoved(

3302

client.dbus_object_path,

3303

client._get_all_interface_names())

3304

# Old signal

3305

self.ClientRemoved(client.dbus_object_path,

3306

client.name)

2793

3307

2794

3308

mandos_dbus_service = MandosDBusService()

2795

3309

2808

3322

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

2809

3323

clients = {}

2810

3324

with PGPEngine() as pgp:

2811

for client in tcp_server.clients.itervalues():

3325

for client in tcp_server.clients.values():

2812

3326

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

2813

3327

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

2814

3328

key)

2838

3352

prefix='clients-',

2839

3353

dir=os.path.dirname(stored_state_path),

2840

3354

delete=False) as stored_state:

2841

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

3355

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

3356

protocol = 2)

2842

3357

tempname = stored_state.name

2843

3358

os.rename(tempname, stored_state_path)

2844

3359

except (IOError, OSError) as e:

2860

3375

name, client = tcp_server.clients.popitem()

2861

3376

if use_dbus:

2862

3377

client.remove_from_connection()

2863

# Don't signal anything except ClientRemoved

3378

# Don't signal the disabling

2864

3379

client.disable(quiet=True)

3380

# Emit D-Bus signal for removal

2865

3381

if use_dbus:

2866

# Emit D-Bus signal

2867

mandos_dbus_service.ClientRemoved(

2868

client.dbus_object_path, client.name)

3382

mandos_dbus_service.client_removed_signal(client)

2869

3383

client_settings.clear()

2870

3384

2871

3385

atexit.register(cleanup)

2872

3386

2873

for client in tcp_server.clients.itervalues():

3387

for client in tcp_server.clients.values():

2874

3388

if use_dbus:

2875

# Emit D-Bus signal

2876

mandos_dbus_service.ClientAdded(client.dbus_object_path)

3389

# Emit D-Bus signal for adding

3390

mandos_dbus_service.client_added_signal(client)

2877

3391

# Need to initiate checking of clients

2878

3392

if client.enabled:

2879

3393

client.init_checker()

2905

3419

sys.exit(1)

2906

3420

# End of Avahi example code

2907

3421

2908

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

2909

lambda *args, **kwargs:

2910

(tcp_server.handle_request

2911

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

3422

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

3423

lambda *args, **kwargs:

3424

(tcp_server.handle_request

3425

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

2912

3426

2913

3427

logger.debug("Starting main loop")

2914

3428

main_loop.run()