/mandos/trunk : revision 754

1

#!/usr/bin/python

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#!/usr/bin/python2.7

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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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try:

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from future_builtins import *

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except ImportError:

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pass

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from future_builtins import *

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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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from gi.repository import GLib

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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 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 = "1.7.5"

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version = "1.6.9"

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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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'--homedir', self.tempdir,

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'--home', self.tempdir,

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'--force-mdc',

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'--quiet',

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'--no-use-agent']

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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([self.gpg, '--symmetric',

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

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'--passphrase-file',

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passfile.name]

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+ self.gnupgargs,

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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([self.gpg, '--decrypt',

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

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'--passphrase-file',

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passfile.name]

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+ self.gnupgargs,

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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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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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self.add()

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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)

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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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593

def bye(self):

594

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

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# Error handling functions

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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:

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return result

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if result == gnutls.E_NO_CERTIFICATE_FOUND:

603

raise gnutls.CertificateSecurityError(code = result)

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raise gnutls.Error(code = result)

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606

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)

612

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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628

set_default_priority = _library.gnutls_set_default_priority

629

set_default_priority.argtypes = [session_t]

630

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,

634

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

643

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

659

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()

746

427

747

428

class Client(object):

748

429

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

754

435

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

755

436

to see if the client lives.

756

437

'None' if no process is running.

757

checker_callback_tag: a GLib event source tag, or None

438

checker_callback_tag: a gobject event source tag, or None

758

439

checker_command: string; External command which is run to check

759

440

if client lives. %() expansions are done at

760

441

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

761

442

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

762

checker_initiator_tag: a GLib event source tag, or None

443

checker_initiator_tag: a gobject event source tag, or None

763

444

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

764

445

client_structure: Object describing what attributes a client has

765

446

and is used for storing the client at exit

766

447

current_checker_command: string; current running checker_command

767

disable_initiator_tag: a GLib event source tag, or None

448

disable_initiator_tag: a gobject event source tag, or None

768

449

enabled: bool()

769

450

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

770

451

uniquely identify the client

775

456

last_checker_status: integer between 0 and 255 reflecting exit

776

457

status of last checker. -1 reflects crashed

777

458

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

780

459

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

781

460

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

782

461

D-Bus identifiers

833

512

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

834

513

.replace(" ", ""))

835

514

if "secret" in section:

836

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

837

.encode("utf-8"),

838

"base64")

515

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

839

516

elif "secfile" in section:

840

517

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

841

518

(section["secfile"])),

894

571

self.changedstate = multiprocessing_manager.Condition(

895

572

multiprocessing_manager.Lock())

896

573

self.client_structure = [attr

897

for attr in self.__dict__.keys()

574

for attr in self.__dict__.iterkeys()

898

575

if not attr.startswith("_")]

899

576

self.client_structure.append("client_structure")

900

577

926

603

if not quiet:

927

604

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

928

605

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

929

GLib.source_remove(self.disable_initiator_tag)

606

gobject.source_remove(self.disable_initiator_tag)

930

607

self.disable_initiator_tag = None

931

608

self.expires = None

932

609

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

933

GLib.source_remove(self.checker_initiator_tag)

610

gobject.source_remove(self.checker_initiator_tag)

934

611

self.checker_initiator_tag = None

935

612

self.stop_checker()

936

613

self.enabled = False

937

614

if not quiet:

938

615

self.send_changedstate()

939

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

616

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

940

617

return False

941

618

942

619

def __del__(self):

946

623

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

947

624

# and every interval from then on.

948

625

if self.checker_initiator_tag is not None:

949

GLib.source_remove(self.checker_initiator_tag)

950

self.checker_initiator_tag = GLib.timeout_add(

626

gobject.source_remove(self.checker_initiator_tag)

627

self.checker_initiator_tag = gobject.timeout_add(

951

628

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

952

629

self.start_checker)

953

630

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

954

631

if self.disable_initiator_tag is not None:

955

GLib.source_remove(self.disable_initiator_tag)

956

self.disable_initiator_tag = GLib.timeout_add(

632

gobject.source_remove(self.disable_initiator_tag)

633

self.disable_initiator_tag = gobject.timeout_add(

957

634

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

958

635

# Also start a new checker *right now*.

959

636

self.start_checker()

960

637

961

def checker_callback(self, source, condition, connection,

962

command):

638

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

963

639

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

964

640

self.checker_callback_tag = None

965

641

self.checker = None

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

642

if os.WIFEXITED(condition):

643

self.last_checker_status = os.WEXITSTATUS(condition)

973

644

if self.last_checker_status == 0:

974

645

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

975

646

vars(self))

978

649

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

979

650

else:

980

651

self.last_checker_status = -1

981

self.last_checker_signal = -returncode

982

652

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

983

653

vars(self))

984

return False

985

654

986

655

def checked_ok(self):

987

656

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

988

657

self.last_checked_ok = datetime.datetime.utcnow()

989

658

self.last_checker_status = 0

990

self.last_checker_signal = None

991

659

self.bump_timeout()

992

660

993

661

def bump_timeout(self, timeout=None):

995

663

if timeout is None:

996

664

timeout = self.timeout

997

665

if self.disable_initiator_tag is not None:

998

GLib.source_remove(self.disable_initiator_tag)

666

gobject.source_remove(self.disable_initiator_tag)

999

667

self.disable_initiator_tag = None

1000

668

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

1001

self.disable_initiator_tag = GLib.timeout_add(

669

self.disable_initiator_tag = gobject.timeout_add(

1002

670

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

1003

671

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

1004

672

1019

687

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

1020

688

# should be.

1021

689

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

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)

1026

704

# Start a new checker if needed

1027

705

if self.checker is None:

1028

706

# Escape attributes for the shell

1037

715

exc_info=error)

1038

716

return True # Try again later

1039

717

self.current_checker_command = command

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

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

1066

759

return True

1067

760

1068

761

def stop_checker(self):

1069

762

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

1070

763

if self.checker_callback_tag:

1071

GLib.source_remove(self.checker_callback_tag)

764

gobject.source_remove(self.checker_callback_tag)

1072

765

self.checker_callback_tag = None

1073

766

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

1074

767

return

1075

768

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

1076

self.checker.terminate()

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

1077

777

self.checker = None

1078

778

1079

779

1143

843

access="r")

1144

844

def Property_dbus_property(self):

1145

845

return dbus.Boolean(False)

1146

1147

See also the DBusObjectWithAnnotations class.

1148

846

"""

1149

847

1150

848

def decorator(func):

1172

870

pass

1173

871

1174

872

1175

class DBusObjectWithAnnotations(dbus.service.Object):

1176

"""A D-Bus object with annotations.

873

class DBusObjectWithProperties(dbus.service.Object):

874

"""A D-Bus object with properties.

1177

875

1178

Classes inheriting from this can use the dbus_annotations

1179

decorator to add annotations to methods or signals.

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.

1180

879

"""

1181

880

1182

881

@staticmethod

1198

897

for name, athing in

1199

898

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

1200

899

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

1272

900

def _get_dbus_property(self, interface_name, property_name):

1273

901

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

1274

902

property with the specified name and interface.

1284

912

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

1285

913

self.dbus_object_path, interface_name, property_name))

1286

914

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

1296

915

@dbus.service.method(dbus.PROPERTIES_IFACE,

1297

916

in_signature="ss",

1298

917

out_signature="v")

1368

987

1369

988

Inserts property tags and interface annotation tags.

1370

989

"""

1371

xmlstring = DBusObjectWithAnnotations.Introspect(self,

1372

object_path,

1373

connection)

990

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

991

connection)

1374

992

try:

1375

993

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

1376

994

1389

1007

if prop._dbus_interface

1390

1008

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

1391

1009

if_tag.appendChild(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)

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)

1408

1039

# Add the names to the return values for the

1409

1040

# "org.freedesktop.DBus.Properties" methods

1410

1041

if (if_tag.getAttribute("name")

1428

1059

exc_info=error)

1429

1060

return xmlstring

1430

1061

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

1499

1062

1500

1063

def datetime_to_dbus(dt, variant_level=0):

1501

1064

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

1548

1111

interface_names.add(alt_interface)

1549

1112

# Is this a D-Bus signal?

1550

1113

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

1551

# Extract the original non-method undecorated

1552

# function by black magic

1553

if sys.version_info.major == 2:

1114

if sys.version == 2:

1115

# Extract the original non-method undecorated

1116

# function by black magic

1554

1117

nonmethod_func = (dict(

1555

1118

zip(attribute.func_code.co_freevars,

1556

1119

attribute.__closure__))

1557

1120

["func"].cell_contents)

1558

1121

else:

1559

nonmethod_func = (dict(

1560

zip(attribute.__code__.co_freevars,

1561

attribute.__closure__))

1562

["func"].cell_contents)

1122

nonmethod_func = attribute

1563

1123

# Create a new, but exactly alike, function

1564

1124

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

1565

1125

# with the alternate D-Bus interface name

1566

new_function = copy_function(nonmethod_func)

1126

if sys.version == 2:

1127

new_function = types.FunctionType(

1128

nonmethod_func.func_code,

1129

nonmethod_func.func_globals,

1130

nonmethod_func.func_name,

1131

nonmethod_func.func_defaults,

1132

nonmethod_func.func_closure)

1133

else:

1134

new_function = types.FunctionType(

1135

nonmethod_func.__code__,

1136

nonmethod_func.__globals__,

1137

nonmethod_func.__name__,

1138

nonmethod_func.__defaults__,

1139

nonmethod_func.__closure__)

1567

1140

new_function = (dbus.service.signal(

1568

1141

alt_interface,

1569

1142

attribute._dbus_signature)(new_function))

1582

1155

func1 and func2 to the "call_both" function

1583

1156

outside of its arguments"""

1584

1157

1585

@functools.wraps(func2)

1586

1158

def call_both(*args, **kwargs):

1587

1159

"""This function will emit two D-Bus

1588

1160

signals by calling func1 and func2"""

1589

1161

func1(*args, **kwargs)

1590

1162

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)

1595

1163

1596

1164

return call_both

1597

1165

# Create the "call_both" function and add it to

1608

1176

alt_interface,

1609

1177

attribute._dbus_in_signature,

1610

1178

attribute._dbus_out_signature)

1611

(copy_function(attribute)))

1179

(types.FunctionType(attribute.func_code,

1180

attribute.func_globals,

1181

attribute.func_name,

1182

attribute.func_defaults,

1183

attribute.func_closure)))

1612

1184

# Copy annotations, if any

1613

1185

try:

1614

1186

attr[attrname]._dbus_annotations = dict(

1626

1198

attribute._dbus_access,

1627

1199

attribute._dbus_get_args_options

1628

1200

["byte_arrays"])

1629

(copy_function(attribute)))

1201

(types.FunctionType(

1202

attribute.func_code,

1203

attribute.func_globals,

1204

attribute.func_name,

1205

attribute.func_defaults,

1206

attribute.func_closure)))

1630

1207

# Copy annotations, if any

1631

1208

try:

1632

1209

attr[attrname]._dbus_annotations = dict(

1641

1218

# to the class.

1642

1219

attr[attrname] = (

1643

1220

dbus_interface_annotations(alt_interface)

1644

(copy_function(attribute)))

1221

(types.FunctionType(attribute.func_code,

1222

attribute.func_globals,

1223

attribute.func_name,

1224

attribute.func_defaults,

1225

attribute.func_closure)))

1645

1226

if deprecate:

1646

1227

# Deprecate all alternate interfaces

1647

1228

iname="_AlternateDBusNames_interface_annotation{}"

1660

1241

if interface_names:

1661

1242

# Replace the class with a new subclass of it with

1662

1243

# methods, signals, etc. as created above.

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)

1244

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

1245

(cls, ), attr)

1669

1246

return cls

1670

1247

1671

1248

return wrapper

1791

1368

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

1792

1369

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

1793

1370

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:

1371

def checker_callback(self, pid, condition, command,

1372

*args, **kwargs):

1373

self.checker_callback_tag = None

1374

self.checker = None

1375

if os.WIFEXITED(condition):

1376

exitstatus = os.WEXITSTATUS(condition)

1801

1377

# Emit D-Bus signal

1802

1378

self.CheckerCompleted(dbus.Int16(exitstatus),

1803

# This is specific to GNU libC

1804

dbus.Int64(exitstatus << 8),

1379

dbus.Int64(condition),

1805

1380

dbus.String(command))

1806

1381

else:

1807

1382

# Emit D-Bus signal

1808

1383

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

1809

dbus.Int64(

1810

# This is specific to GNU libC

1811

(exitstatus << 8)

1812

| self.last_checker_signal),

1384

dbus.Int64(condition),

1813

1385

dbus.String(command))

1814

return ret

1386

1387

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

1388

*args, **kwargs)

1815

1389

1816

1390

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

1817

1391

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

1829

1403

1830

1404

def approve(self, value=True):

1831

1405

self.approved = value

1832

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

1833

* 1000), self._reset_approved)

1406

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

1407

* 1000), self._reset_approved)

1834

1408

self.send_changedstate()

1835

1409

1836

1410

## D-Bus methods, signals & properties

1892

1466

self.checked_ok()

1893

1467

1894

1468

# Enable - method

1895

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

1896

1469

@dbus.service.method(_interface)

1897

1470

def Enable(self):

1898

1471

"D-Bus method"

1899

1472

self.enable()

1900

1473

1901

1474

# StartChecker - method

1902

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

1903

1475

@dbus.service.method(_interface)

1904

1476

def StartChecker(self):

1905

1477

"D-Bus method"

1906

1478

self.start_checker()

1907

1479

1908

1480

# Disable - method

1909

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

1910

1481

@dbus.service.method(_interface)

1911

1482

def Disable(self):

1912

1483

"D-Bus method"

1913

1484

self.disable()

1914

1485

1915

1486

# StopChecker - method

1916

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

1917

1487

@dbus.service.method(_interface)

1918

1488

def StopChecker(self):

1919

1489

self.stop_checker()

1955

1525

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

1956

1526

1957

1527

# Name - property

1958

@dbus_annotations(

1959

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

1960

1528

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

1961

1529

def Name_dbus_property(self):

1962

1530

return dbus.String(self.name)

1963

1531

1964

1532

# Fingerprint - property

1965

@dbus_annotations(

1966

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

1967

1533

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

1968

1534

def Fingerprint_dbus_property(self):

1969

1535

return dbus.String(self.fingerprint)

1978

1544

self.host = str(value)

1979

1545

1980

1546

# Created - property

1981

@dbus_annotations(

1982

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

1983

1547

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

1984

1548

def Created_dbus_property(self):

1985

1549

return datetime_to_dbus(self.created)

2046

1610

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

2047

1611

is None):

2048

1612

return

2049

GLib.source_remove(self.disable_initiator_tag)

2050

self.disable_initiator_tag = GLib.timeout_add(

1613

gobject.source_remove(self.disable_initiator_tag)

1614

self.disable_initiator_tag = gobject.timeout_add(

2051

1615

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

2052

1616

self.disable)

2053

1617

2073

1637

return

2074

1638

if self.enabled:

2075

1639

# Reschedule checker run

2076

GLib.source_remove(self.checker_initiator_tag)

2077

self.checker_initiator_tag = GLib.timeout_add(

1640

gobject.source_remove(self.checker_initiator_tag)

1641

self.checker_initiator_tag = gobject.timeout_add(

2078

1642

value, self.start_checker)

2079

1643

self.start_checker() # Start one now, too

2080

1644

2100

1664

self.stop_checker()

2101

1665

2102

1666

# ObjectPath - property

2103

@dbus_annotations(

2104

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

2105

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

2106

1667

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

2107

1668

def ObjectPath_dbus_property(self):

2108

1669

return self.dbus_object_path # is already a dbus.ObjectPath

2109

1670

2110

1671

# Secret = property

2111

@dbus_annotations(

2112

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

2113

"invalidates"})

2114

1672

@dbus_service_property(_interface,

2115

1673

signature="ay",

2116

1674

access="write",

2162

1720

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

2163

1721

self.server.child_pipe.fileno())

2164

1722

2165

session = gnutls.ClientSession(self.request)

1723

session = gnutls.connection.ClientSession(

1724

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

1725

1726

# Note: gnutls.connection.X509Credentials is really a

1727

# generic GnuTLS certificate credentials object so long as

1728

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

1729

# here despite using OpenPGP certificates.

2166

1730

2167

1731

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

2168

1732

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

2172

1736

priority = self.server.gnutls_priority

2173

1737

if priority is None:

2174

1738

priority = "NORMAL"

2175

gnutls.priority_set_direct(session._c_object, priority,

2176

None)

1739

gnutls.library.functions.gnutls_priority_set_direct(

1740

session._c_object, priority, None)

2177

1741

2178

1742

# Start communication using the Mandos protocol

2179

1743

# Get protocol number

2189

1753

# Start GnuTLS connection

2190

1754

try:

2191

1755

session.handshake()

2192

except gnutls.Error as error:

1756

except gnutls.errors.GNUTLSError as error:

2193

1757

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

2194

1758

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

2195

1759

# established. Just abandon the request.

2201

1765

try:

2202

1766

fpr = self.fingerprint(

2203

1767

self.peer_certificate(session))

2204

except (TypeError, gnutls.Error) as error:

1768

except (TypeError,

1769

gnutls.errors.GNUTLSError) as error:

2205

1770

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

2206

1771

return

2207

1772

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

2265

1830

else:

2266

1831

delay -= time2 - time

2267

1832

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

sent_size = 0

1834

while sent_size < len(client.secret):

1835

try:

1836

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

1837

except gnutls.errors.GNUTLSError as error:

1838

logger.warning("gnutls send failed",

1839

exc_info=error)

1840

return

1841

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

1842

len(client.secret) - (sent_size

1843

+ sent))

1844

sent_size += sent

2274

1845

2275

1846

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

2276

1847

# bump the timeout using extended_timeout

2284

1855

client.approvals_pending -= 1

2285

1856

try:

2286

1857

session.bye()

2287

except gnutls.Error as error:

1858

except gnutls.errors.GNUTLSError as error:

2288

1859

logger.warning("GnuTLS bye failed",

2289

1860

exc_info=error)

2290

1861

2292

1863

def peer_certificate(session):

2293

1864

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

2294

1865

# If not an OpenPGP certificate...

2295

if (gnutls.certificate_type_get(session._c_object)

2296

!= gnutls.CRT_OPENPGP):

2297

# ...return invalid data

2298

return b""

1866

if (gnutls.library.functions.gnutls_certificate_type_get(

1867

session._c_object)

1868

!= gnutls.library.constants.GNUTLS_CRT_OPENPGP):

1869

# ...do the normal thing

1870

return session.peer_certificate

2299

1871

list_size = ctypes.c_uint(1)

2300

cert_list = (gnutls.certificate_get_peers

1872

cert_list = (gnutls.library.functions

1873

.gnutls_certificate_get_peers

2301

1874

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

2302

1875

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

2303

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

1876

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

1877

" certificate")

2304

1878

if list_size.value == 0:

2305

1879

return None

2306

1880

cert = cert_list[0]

2310

1884

def fingerprint(openpgp):

2311

1885

"Convert an OpenPGP bytestring to a hexdigit fingerprint"

2312

1886

# New GnuTLS "datum" with the OpenPGP public key

2313

datum = gnutls.datum_t(

1887

datum = gnutls.library.types.gnutls_datum_t(

2314

1888

ctypes.cast(ctypes.c_char_p(openpgp),

2315

1889

ctypes.POINTER(ctypes.c_ubyte)),

2316

1890

ctypes.c_uint(len(openpgp)))

2317

1891

# New empty GnuTLS certificate

2318

crt = gnutls.openpgp_crt_t()

2319

gnutls.openpgp_crt_init(ctypes.byref(crt))

1892

crt = gnutls.library.types.gnutls_openpgp_crt_t()

1893

gnutls.library.functions.gnutls_openpgp_crt_init(

1894

ctypes.byref(crt))

2320

1895

# Import the OpenPGP public key into the certificate

2321

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

2322

gnutls.OPENPGP_FMT_RAW)

1896

gnutls.library.functions.gnutls_openpgp_crt_import(

1897

crt, ctypes.byref(datum),

1898

gnutls.library.constants.GNUTLS_OPENPGP_FMT_RAW)

2323

1899

# Verify the self signature in the key

2324

1900

crtverify = ctypes.c_uint()

2325

gnutls.openpgp_crt_verify_self(crt, 0,

2326

ctypes.byref(crtverify))

1901

gnutls.library.functions.gnutls_openpgp_crt_verify_self(

1902

crt, 0, ctypes.byref(crtverify))

2327

1903

if crtverify.value != 0:

2328

gnutls.openpgp_crt_deinit(crt)

2329

raise gnutls.CertificateSecurityError("Verify failed")

1904

gnutls.library.functions.gnutls_openpgp_crt_deinit(crt)

1905

raise gnutls.errors.CertificateSecurityError(

1906

"Verify failed")

2330

1907

# New buffer for the fingerprint

2331

1908

buf = ctypes.create_string_buffer(20)

2332

1909

buf_len = ctypes.c_size_t()

2333

1910

# Get the fingerprint from the certificate into the buffer

2334

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

2335

ctypes.byref(buf_len))

1911

gnutls.library.functions.gnutls_openpgp_crt_get_fingerprint(

1912

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

2336

1913

# Deinit the certificate

2337

gnutls.openpgp_crt_deinit(crt)

1914

gnutls.library.functions.gnutls_openpgp_crt_deinit(crt)

2338

1915

# Convert the buffer to a Python bytestring

2339

1916

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

2340

1917

# Convert the bytestring to hexadecimal notation

2484

2061

gnutls_priority GnuTLS priority string

2485

2062

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

2486

2063

2487

Assumes a GLib.MainLoop event loop.

2064

Assumes a gobject.MainLoop event loop.

2488

2065

"""

2489

2066

2490

2067

def __init__(self, server_address, RequestHandlerClass,

2515

2092

2516

2093

def add_pipe(self, parent_pipe, proc):

2517

2094

# Call "handle_ipc" for both data and EOF events

2518

GLib.io_add_watch(

2095

gobject.io_add_watch(

2519

2096

parent_pipe.fileno(),

2520

GLib.IO_IN | GLib.IO_HUP,

2097

gobject.IO_IN | gobject.IO_HUP,

2521

2098

functools.partial(self.handle_ipc,

2522

2099

parent_pipe = parent_pipe,

2523

2100

proc = proc))

2527

2104

proc = None,

2528

2105

client_object=None):

2529

2106

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

2530

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

2107

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

2531

2108

# Wait for other process to exit

2532

2109

proc.join()

2533

2110

return False

2540

2117

fpr = request[1]

2541

2118

address = request[2]

2542

2119

2543

for c in self.clients.values():

2120

for c in self.clients.itervalues():

2544

2121

if c.fingerprint == fpr:

2545

2122

client = c

2546

2123

break

2554

2131

parent_pipe.send(False)

2555

2132

return False

2556

2133

2557

GLib.io_add_watch(

2134

gobject.io_add_watch(

2558

2135

parent_pipe.fileno(),

2559

GLib.IO_IN | GLib.IO_HUP,

2136

gobject.IO_IN | gobject.IO_HUP,

2560

2137

functools.partial(self.handle_ipc,

2561

2138

parent_pipe = parent_pipe,

2562

2139

proc = proc,

2576

2153

2577

2154

if command == 'getattr':

2578

2155

attrname = request[1]

2579

if isinstance(client_object.__getattribute__(attrname),

2580

collections.Callable):

2156

if callable(client_object.__getattribute__(attrname)):

2581

2157

parent_pipe.send(('function', ))

2582

2158

else:

2583

2159

parent_pipe.send((

2821

2397

"debug": "False",

2822

2398

"priority":

2823

2399

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

2824

":+SIGN-DSA-SHA256",

2400

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

2825

2401

"servicename": "Mandos",

2826

2402

"use_dbus": "True",

2827

2403

"use_ipv6": "True",

2944

2520

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

2945

2521

exc_info=e)

2946

2522

2947

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

2948

("mandos", "mandos"),

2949

("nobody", "nogroup")):

2523

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

2950

2524

try:

2951

2525

uid = pwd.getpwnam(name).pw_uid

2952

gid = pwd.getpwnam(group).pw_gid

2526

gid = pwd.getpwnam(name).pw_gid

2953

2527

break

2954

2528

except KeyError:

2955

2529

continue

2959

2533

try:

2960

2534

os.setgid(gid)

2961

2535

os.setuid(uid)

2962

if debug:

2963

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

2964

gid))

2965

2536

except OSError as error:

2966

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

2967

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

2968

2537

if error.errno != errno.EPERM:

2969

2538

raise

2970

2539

2973

2542

2974

2543

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

2975

2544

# - GnuTLS manual

2976

gnutls.global_set_log_level(11)

2545

gnutls.library.functions.gnutls_global_set_log_level(11)

2977

2546

2978

@gnutls.log_func

2547

@gnutls.library.types.gnutls_log_func

2979

2548

def debug_gnutls(level, string):

2980

2549

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

2981

2550

2982

gnutls.global_set_log_function(debug_gnutls)

2551

gnutls.library.functions.gnutls_global_set_log_function(

2552

debug_gnutls)

2983

2553

2984

2554

# Redirect stdin so all checkers get /dev/null

2985

2555

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

2992

2562

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

2993

2563

daemon()

2994

2564

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

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

2566

# need to inform gobject that threads will be used.

2567

gobject.threads_init()

2998

2568

2999

2569

global main_loop

3000

2570

# From the Avahi example code

3001

2571

DBusGMainLoop(set_as_default=True)

3002

main_loop = GLib.MainLoop()

2572

main_loop = gobject.MainLoop()

3003

2573

bus = dbus.SystemBus()

3004

2574

# End of Avahi example code

3005

2575

if use_dbus:

3049

2619

if server_settings["restore"]:

3050

2620

try:

3051

2621

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

2622

clients_data, old_client_settings = pickle.load(

2623

stored_state)

3097

2624

os.remove(stored_state_path)

3098

2625

except IOError as e:

3099

2626

if e.errno == errno.ENOENT:

3132

2659

pass

3133

2660

3134

2661

# Clients who has passed its expire date can still be

3135

# enabled if its last checker was successful. A Client

2662

# enabled if its last checker was successful. Clients

3136

2663

# whose checker succeeded before we stored its state is

3137

2664

# assumed to have successfully run all checkers during

3138

2665

# downtime.

3200

2727

del pidfile

3201

2728

del pidfilename

3202

2729

3203

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

3204

GLib.unix_signal_add(GLib.PRIORITY_HIGH, termsig,

3205

lambda: main_loop.quit() and False)

2730

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

2731

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

3206

2732

3207

2733

if use_dbus:

3208

2734

3209

2735

@alternate_dbus_interfaces(

3210

2736

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

3211

class MandosDBusService(DBusObjectWithObjectManager):

2737

class MandosDBusService(DBusObjectWithProperties):

3212

2738

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

3213

2739

3214

2740

def __init__(self):

3216

2742

3217

2743

_interface = "se.recompile.Mandos"

3218

2744

2745

@dbus_interface_annotations(_interface)

2746

def _foo(self):

2747

return {

2748

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

2749

"false" }

2750

3219

2751

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

3220

2752

def ClientAdded(self, objpath):

3221

2753

"D-Bus signal"

3226

2758

"D-Bus signal"

3227

2759

pass

3228

2760

3229

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

3230

"true"})

3231

2761

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

3232

2762

def ClientRemoved(self, objpath, name):

3233

2763

"D-Bus signal"

3234

2764

pass

3235

2765

3236

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

3237

"true"})

3238

2766

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

3239

2767

def GetAllClients(self):

3240

2768

"D-Bus method"

3241

2769

return dbus.Array(c.dbus_object_path for c in

3242

tcp_server.clients.values())

2770

tcp_server.clients.itervalues())

3243

2771

3244

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

3245

"true"})

3246

2772

@dbus.service.method(_interface,

3247

2773

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

3248

2774

def GetAllClientsWithProperties(self):

3249

2775

"D-Bus method"

3250

2776

return dbus.Dictionary(

3251

{ c.dbus_object_path: c.GetAll(

3252

"se.recompile.Mandos.Client")

3253

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

2777

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

2778

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

3254

2779

signature="oa{sv}")

3255

2780

3256

2781

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

3257

2782

def RemoveClient(self, object_path):

3258

2783

"D-Bus method"

3259

for c in tcp_server.clients.values():

2784

for c in tcp_server.clients.itervalues():

3260

2785

if c.dbus_object_path == object_path:

3261

2786

del tcp_server.clients[c.name]

3262

2787

c.remove_from_connection()

3263

# Don't signal the disabling

2788

# Don't signal anything except ClientRemoved

3264

2789

c.disable(quiet=True)

3265

# Emit D-Bus signal for removal

3266

self.client_removed_signal(c)

2790

# Emit D-Bus signal

2791

self.ClientRemoved(object_path, c.name)

3267

2792

return

3268

2793

raise KeyError(object_path)

3269

2794

3270

2795

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)

3307

2796

3308

2797

mandos_dbus_service = MandosDBusService()

3309

2798

3322

2811

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

3323

2812

clients = {}

3324

2813

with PGPEngine() as pgp:

3325

for client in tcp_server.clients.values():

2814

for client in tcp_server.clients.itervalues():

3326

2815

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

3327

2816

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

3328

2817

key)

3352

2841

prefix='clients-',

3353

2842

dir=os.path.dirname(stored_state_path),

3354

2843

delete=False) as stored_state:

3355

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

3356

protocol = 2)

2844

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

3357

2845

tempname = stored_state.name

3358

2846

os.rename(tempname, stored_state_path)

3359

2847

except (IOError, OSError) as e:

3375

2863

name, client = tcp_server.clients.popitem()

3376

2864

if use_dbus:

3377

2865

client.remove_from_connection()

3378

# Don't signal the disabling

2866

# Don't signal anything except ClientRemoved

3379

2867

client.disable(quiet=True)

3380

# Emit D-Bus signal for removal

3381

2868

if use_dbus:

3382

mandos_dbus_service.client_removed_signal(client)

2869

# Emit D-Bus signal

2870

mandos_dbus_service.ClientRemoved(

2871

client.dbus_object_path, client.name)

3383

2872

client_settings.clear()

3384

2873

3385

2874

atexit.register(cleanup)

3386

2875

3387

for client in tcp_server.clients.values():

2876

for client in tcp_server.clients.itervalues():

3388

2877

if use_dbus:

3389

# Emit D-Bus signal for adding

3390

mandos_dbus_service.client_added_signal(client)

2878

# Emit D-Bus signal

2879

mandos_dbus_service.ClientAdded(client.dbus_object_path)

3391

2880

# Need to initiate checking of clients

3392

2881

if client.enabled:

3393

2882

client.init_checker()

3419

2908

sys.exit(1)

3420

2909

# End of Avahi example code

3421

2910

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))

2911

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

2912

lambda *args, **kwargs:

2913

(tcp_server.handle_request

2914

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

3426

2915

3427

2916

logger.debug("Starting main loop")

3428

2917

main_loop.run()