/mandos/trunk : revision 752

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 = "1.7.6"

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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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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:

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

611

return _error_code(result)

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result = func(*arguments)

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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

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,

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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

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."""

1550

1113

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

1551

1114

# Extract the original non-method undecorated

1552

1115

# function by black magic

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)

1116

nonmethod_func = (dict(

1117

zip(attribute.func_code.co_freevars,

1118

attribute.__closure__))

1119

["func"].cell_contents)

1563

1120

# Create a new, but exactly alike, function

1564

1121

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

1565

1122

# with the alternate D-Bus interface name

1566

new_function = copy_function(nonmethod_func)

1567

1123

new_function = (dbus.service.signal(

1568

alt_interface,

1569

attribute._dbus_signature)(new_function))

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)))

1570

1131

# Copy annotations, if any

1571

1132

try:

1572

1133

new_function._dbus_annotations = dict(

1582

1143

func1 and func2 to the "call_both" function

1583

1144

outside of its arguments"""

1584

1145

1585

@functools.wraps(func2)

1586

1146

def call_both(*args, **kwargs):

1587

1147

"""This function will emit two D-Bus

1588

1148

signals by calling func1 and func2"""

1589

1149

func1(*args, **kwargs)

1590

1150

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

1151

1596

1152

return call_both

1597

1153

# Create the "call_both" function and add it to

1608

1164

alt_interface,

1609

1165

attribute._dbus_in_signature,

1610

1166

attribute._dbus_out_signature)

1611

(copy_function(attribute)))

1167

(types.FunctionType(attribute.func_code,

1168

attribute.func_globals,

1169

attribute.func_name,

1170

attribute.func_defaults,

1171

attribute.func_closure)))

1612

1172

# Copy annotations, if any

1613

1173

try:

1614

1174

attr[attrname]._dbus_annotations = dict(

1626

1186

attribute._dbus_access,

1627

1187

attribute._dbus_get_args_options

1628

1188

["byte_arrays"])

1629

(copy_function(attribute)))

1189

(types.FunctionType(

1190

attribute.func_code,

1191

attribute.func_globals,

1192

attribute.func_name,

1193

attribute.func_defaults,

1194

attribute.func_closure)))

1630

1195

# Copy annotations, if any

1631

1196

try:

1632

1197

attr[attrname]._dbus_annotations = dict(

1641

1206

# to the class.

1642

1207

attr[attrname] = (

1643

1208

dbus_interface_annotations(alt_interface)

1644

(copy_function(attribute)))

1209

(types.FunctionType(attribute.func_code,

1210

attribute.func_globals,

1211

attribute.func_name,

1212

attribute.func_defaults,

1213

attribute.func_closure)))

1645

1214

if deprecate:

1646

1215

# Deprecate all alternate interfaces

1647

1216

iname="_AlternateDBusNames_interface_annotation{}"

1660

1229

if interface_names:

1661

1230

# Replace the class with a new subclass of it with

1662

1231

# 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)

1232

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

1233

(cls, ), attr)

1669

1234

return cls

1670

1235

1671

1236

return wrapper

1791

1356

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

1792

1357

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

1793

1358

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:

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)

1801

1365

# Emit D-Bus signal

1802

1366

self.CheckerCompleted(dbus.Int16(exitstatus),

1803

# This is specific to GNU libC

1804

dbus.Int64(exitstatus << 8),

1367

dbus.Int64(condition),

1805

1368

dbus.String(command))

1806

1369

else:

1807

1370

# Emit D-Bus signal

1808

1371

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

1809

dbus.Int64(

1810

# This is specific to GNU libC

1811

(exitstatus << 8)

1812

| self.last_checker_signal),

1372

dbus.Int64(condition),

1813

1373

dbus.String(command))

1814

return ret

1374

1375

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

1376

*args, **kwargs)

1815

1377

1816

1378

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

1817

1379

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

1829

1391

1830

1392

def approve(self, value=True):

1831

1393

self.approved = value

1832

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

1833

* 1000), self._reset_approved)

1394

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

1395

* 1000), self._reset_approved)

1834

1396

self.send_changedstate()

1835

1397

1836

1398

## D-Bus methods, signals & properties

1892

1454

self.checked_ok()

1893

1455

1894

1456

# Enable - method

1895

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

1896

1457

@dbus.service.method(_interface)

1897

1458

def Enable(self):

1898

1459

"D-Bus method"

1899

1460

self.enable()

1900

1461

1901

1462

# StartChecker - method

1902

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

1903

1463

@dbus.service.method(_interface)

1904

1464

def StartChecker(self):

1905

1465

"D-Bus method"

1906

1466

self.start_checker()

1907

1467

1908

1468

# Disable - method

1909

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

1910

1469

@dbus.service.method(_interface)

1911

1470

def Disable(self):

1912

1471

"D-Bus method"

1913

1472

self.disable()

1914

1473

1915

1474

# StopChecker - method

1916

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

1917

1475

@dbus.service.method(_interface)

1918

1476

def StopChecker(self):

1919

1477

self.stop_checker()

1955

1513

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

1956

1514

1957

1515

# Name - property

1958

@dbus_annotations(

1959

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

1960

1516

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

1961

1517

def Name_dbus_property(self):

1962

1518

return dbus.String(self.name)

1963

1519

1964

1520

# Fingerprint - property

1965

@dbus_annotations(

1966

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

1967

1521

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

1968

1522

def Fingerprint_dbus_property(self):

1969

1523

return dbus.String(self.fingerprint)

1978

1532

self.host = str(value)

1979

1533

1980

1534

# Created - property

1981

@dbus_annotations(

1982

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

1983

1535

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

1984

1536

def Created_dbus_property(self):

1985

1537

return datetime_to_dbus(self.created)

2046

1598

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

2047

1599

is None):

2048

1600

return

2049

GLib.source_remove(self.disable_initiator_tag)

2050

self.disable_initiator_tag = GLib.timeout_add(

1601

gobject.source_remove(self.disable_initiator_tag)

1602

self.disable_initiator_tag = gobject.timeout_add(

2051

1603

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

2052

1604

self.disable)

2053

1605

2073

1625

return

2074

1626

if self.enabled:

2075

1627

# Reschedule checker run

2076

GLib.source_remove(self.checker_initiator_tag)

2077

self.checker_initiator_tag = GLib.timeout_add(

1628

gobject.source_remove(self.checker_initiator_tag)

1629

self.checker_initiator_tag = gobject.timeout_add(

2078

1630

value, self.start_checker)

2079

1631

self.start_checker() # Start one now, too

2080

1632

2100

1652

self.stop_checker()

2101

1653

2102

1654

# ObjectPath - property

2103

@dbus_annotations(

2104

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

2105

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

2106

1655

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

2107

1656

def ObjectPath_dbus_property(self):

2108

1657

return self.dbus_object_path # is already a dbus.ObjectPath

2109

1658

2110

1659

# Secret = property

2111

@dbus_annotations(

2112

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

2113

"invalidates"})

2114

1660

@dbus_service_property(_interface,

2115

1661

signature="ay",

2116

1662

access="write",

2162

1708

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

2163

1709

self.server.child_pipe.fileno())

2164

1710

2165

session = gnutls.ClientSession(self.request)

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.

2166

1718

2167

1719

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

2168

1720

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

2172

1724

priority = self.server.gnutls_priority

2173

1725

if priority is None:

2174

1726

priority = "NORMAL"

2175

gnutls.priority_set_direct(session._c_object, priority,

2176

None)

1727

gnutls.library.functions.gnutls_priority_set_direct(

1728

session._c_object, priority, None)

2177

1729

2178

1730

# Start communication using the Mandos protocol

2179

1731

# Get protocol number

2189

1741

# Start GnuTLS connection

2190

1742

try:

2191

1743

session.handshake()

2192

except gnutls.Error as error:

1744

except gnutls.errors.GNUTLSError as error:

2193

1745

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

2194

1746

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

2195

1747

# established. Just abandon the request.

2201

1753

try:

2202

1754

fpr = self.fingerprint(

2203

1755

self.peer_certificate(session))

2204

except (TypeError, gnutls.Error) as error:

1756

except (TypeError,

1757

gnutls.errors.GNUTLSError) as error:

2205

1758

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

2206

1759

return

2207

1760

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

2265

1818

else:

2266

1819

delay -= time2 - time

2267

1820

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

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

2274

1833

2275

1834

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

2276

1835

# bump the timeout using extended_timeout

2284

1843

client.approvals_pending -= 1

2285

1844

try:

2286

1845

session.bye()

2287

except gnutls.Error as error:

1846

except gnutls.errors.GNUTLSError as error:

2288

1847

logger.warning("GnuTLS bye failed",

2289

1848

exc_info=error)

2290

1849

2292

1851

def peer_certificate(session):

2293

1852

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

2294

1853

# 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""

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

2299

1859

list_size = ctypes.c_uint(1)

2300

cert_list = (gnutls.certificate_get_peers

1860

cert_list = (gnutls.library.functions

1861

.gnutls_certificate_get_peers

2301

1862

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

2302

1863

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

2303

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

1864

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

1865

" certificate")

2304

1866

if list_size.value == 0:

2305

1867

return None

2306

1868

cert = cert_list[0]

2310

1872

def fingerprint(openpgp):

2311

1873

"Convert an OpenPGP bytestring to a hexdigit fingerprint"

2312

1874

# New GnuTLS "datum" with the OpenPGP public key

2313

datum = gnutls.datum_t(

1875

datum = gnutls.library.types.gnutls_datum_t(

2314

1876

ctypes.cast(ctypes.c_char_p(openpgp),

2315

1877

ctypes.POINTER(ctypes.c_ubyte)),

2316

1878

ctypes.c_uint(len(openpgp)))

2317

1879

# New empty GnuTLS certificate

2318

crt = gnutls.openpgp_crt_t()

2319

gnutls.openpgp_crt_init(ctypes.byref(crt))

1880

crt = gnutls.library.types.gnutls_openpgp_crt_t()

1881

gnutls.library.functions.gnutls_openpgp_crt_init(

1882

ctypes.byref(crt))

2320

1883

# Import the OpenPGP public key into the certificate

2321

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

2322

gnutls.OPENPGP_FMT_RAW)

1884

gnutls.library.functions.gnutls_openpgp_crt_import(

1885

crt, ctypes.byref(datum),

1886

gnutls.library.constants.GNUTLS_OPENPGP_FMT_RAW)

2323

1887

# Verify the self signature in the key

2324

1888

crtverify = ctypes.c_uint()

2325

gnutls.openpgp_crt_verify_self(crt, 0,

2326

ctypes.byref(crtverify))

1889

gnutls.library.functions.gnutls_openpgp_crt_verify_self(

1890

crt, 0, ctypes.byref(crtverify))

2327

1891

if crtverify.value != 0:

2328

gnutls.openpgp_crt_deinit(crt)

2329

raise gnutls.CertificateSecurityError("Verify failed")

1892

gnutls.library.functions.gnutls_openpgp_crt_deinit(crt)

1893

raise gnutls.errors.CertificateSecurityError(

1894

"Verify failed")

2330

1895

# New buffer for the fingerprint

2331

1896

buf = ctypes.create_string_buffer(20)

2332

1897

buf_len = ctypes.c_size_t()

2333

1898

# Get the fingerprint from the certificate into the buffer

2334

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

2335

ctypes.byref(buf_len))

1899

gnutls.library.functions.gnutls_openpgp_crt_get_fingerprint(

1900

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

2336

1901

# Deinit the certificate

2337

gnutls.openpgp_crt_deinit(crt)

1902

gnutls.library.functions.gnutls_openpgp_crt_deinit(crt)

2338

1903

# Convert the buffer to a Python bytestring

2339

1904

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

2340

1905

# Convert the bytestring to hexadecimal notation

2484

2049

gnutls_priority GnuTLS priority string

2485

2050

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

2486

2051

2487

Assumes a GLib.MainLoop event loop.

2052

Assumes a gobject.MainLoop event loop.

2488

2053

"""

2489

2054

2490

2055

def __init__(self, server_address, RequestHandlerClass,

2515

2080

2516

2081

def add_pipe(self, parent_pipe, proc):

2517

2082

# Call "handle_ipc" for both data and EOF events

2518

GLib.io_add_watch(

2083

gobject.io_add_watch(

2519

2084

parent_pipe.fileno(),

2520

GLib.IO_IN | GLib.IO_HUP,

2085

gobject.IO_IN | gobject.IO_HUP,

2521

2086

functools.partial(self.handle_ipc,

2522

2087

parent_pipe = parent_pipe,

2523

2088

proc = proc))

2527

2092

proc = None,

2528

2093

client_object=None):

2529

2094

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

2530

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

2095

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

2531

2096

# Wait for other process to exit

2532

2097

proc.join()

2533

2098

return False

2540

2105

fpr = request[1]

2541

2106

address = request[2]

2542

2107

2543

for c in self.clients.values():

2108

for c in self.clients.itervalues():

2544

2109

if c.fingerprint == fpr:

2545

2110

client = c

2546

2111

break

2554

2119

parent_pipe.send(False)

2555

2120

return False

2556

2121

2557

GLib.io_add_watch(

2122

gobject.io_add_watch(

2558

2123

parent_pipe.fileno(),

2559

GLib.IO_IN | GLib.IO_HUP,

2124

gobject.IO_IN | gobject.IO_HUP,

2560

2125

functools.partial(self.handle_ipc,

2561

2126

parent_pipe = parent_pipe,

2562

2127

proc = proc,

2576

2141

2577

2142

if command == 'getattr':

2578

2143

attrname = request[1]

2579

if isinstance(client_object.__getattribute__(attrname),

2580

collections.Callable):

2144

if callable(client_object.__getattribute__(attrname)):

2581

2145

parent_pipe.send(('function', ))

2582

2146

else:

2583

2147

parent_pipe.send((

2618

2182

# avoid excessive use of external libraries.

2619

2183

2620

2184

# 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

2621

2194

Token = collections.namedtuple("Token", (

2622

2195

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

2623

2196

# a "group" containing digits

2658

2231

# Define starting values

2659

2232

value = datetime.timedelta() # Value so far

2660

2233

found_token = None

2661

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

2234

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

2662

2235

s = duration # String left to parse

2663

2236

# Loop until end token is found

2664

2237

while found_token is not token_end:

2821

2394

"debug": "False",

2822

2395

"priority":

2823

2396

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

2824

":+SIGN-DSA-SHA256",

2397

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

2825

2398

"servicename": "Mandos",

2826

2399

"use_dbus": "True",

2827

2400

"use_ipv6": "True",

2944

2517

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

2945

2518

exc_info=e)

2946

2519

2947

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

2948

("mandos", "mandos"),

2949

("nobody", "nogroup")):

2520

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

2950

2521

try:

2951

2522

uid = pwd.getpwnam(name).pw_uid

2952

gid = pwd.getpwnam(group).pw_gid

2523

gid = pwd.getpwnam(name).pw_gid

2953

2524

break

2954

2525

except KeyError:

2955

2526

continue

2959

2530

try:

2960

2531

os.setgid(gid)

2961

2532

os.setuid(uid)

2962

if debug:

2963

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

2964

gid))

2965

2533

except OSError as error:

2966

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

2967

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

2968

2534

if error.errno != errno.EPERM:

2969

2535

raise

2970

2536

2973

2539

2974

2540

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

2975

2541

# - GnuTLS manual

2976

gnutls.global_set_log_level(11)

2542

gnutls.library.functions.gnutls_global_set_log_level(11)

2977

2543

2978

@gnutls.log_func

2544

@gnutls.library.types.gnutls_log_func

2979

2545

def debug_gnutls(level, string):

2980

2546

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

2981

2547

2982

gnutls.global_set_log_function(debug_gnutls)

2548

gnutls.library.functions.gnutls_global_set_log_function(

2549

debug_gnutls)

2983

2550

2984

2551

# Redirect stdin so all checkers get /dev/null

2985

2552

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

2992

2559

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

2993

2560

daemon()

2994

2561

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()

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()

2998

2565

2999

2566

global main_loop

3000

2567

# From the Avahi example code

3001

2568

DBusGMainLoop(set_as_default=True)

3002

main_loop = GLib.MainLoop()

2569

main_loop = gobject.MainLoop()

3003

2570

bus = dbus.SystemBus()

3004

2571

# End of Avahi example code

3005

2572

if use_dbus:

3049

2616

if server_settings["restore"]:

3050

2617

try:

3051

2618

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"))

2619

clients_data, old_client_settings = pickle.load(

2620

stored_state)

3097

2621

os.remove(stored_state_path)

3098

2622

except IOError as e:

3099

2623

if e.errno == errno.ENOENT:

3132

2656

pass

3133

2657

3134

2658

# Clients who has passed its expire date can still be

3135

# enabled if its last checker was successful. A Client

2659

# enabled if its last checker was successful. Clients

3136

2660

# whose checker succeeded before we stored its state is

3137

2661

# assumed to have successfully run all checkers during

3138

2662

# downtime.

3200

2724

del pidfile

3201

2725

del pidfilename

3202

2726

3203

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

3204

GLib.unix_signal_add(GLib.PRIORITY_HIGH, termsig,

3205

lambda: main_loop.quit() and False)

2727

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

2728

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

3206

2729

3207

2730

if use_dbus:

3208

2731

3209

2732

@alternate_dbus_interfaces(

3210

2733

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

3211

class MandosDBusService(DBusObjectWithObjectManager):

2734

class MandosDBusService(DBusObjectWithProperties):

3212

2735

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

3213

2736

3214

2737

def __init__(self):

3216

2739

3217

2740

_interface = "se.recompile.Mandos"

3218

2741

2742

@dbus_interface_annotations(_interface)

2743

def _foo(self):

2744

return {

2745

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

2746

"false" }

2747

3219

2748

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

3220

2749

def ClientAdded(self, objpath):

3221

2750

"D-Bus signal"

3226

2755

"D-Bus signal"

3227

2756

pass

3228

2757

3229

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

3230

"true"})

3231

2758

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

3232

2759

def ClientRemoved(self, objpath, name):

3233

2760

"D-Bus signal"

3234

2761

pass

3235

2762

3236

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

3237

"true"})

3238

2763

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

3239

2764

def GetAllClients(self):

3240

2765

"D-Bus method"

3241

2766

return dbus.Array(c.dbus_object_path for c in

3242

tcp_server.clients.values())

2767

tcp_server.clients.itervalues())

3243

2768

3244

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

3245

"true"})

3246

2769

@dbus.service.method(_interface,

3247

2770

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

3248

2771

def GetAllClientsWithProperties(self):

3249

2772

"D-Bus method"

3250

2773

return dbus.Dictionary(

3251

{ c.dbus_object_path: c.GetAll(

3252

"se.recompile.Mandos.Client")

3253

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

2774

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

2775

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

3254

2776

signature="oa{sv}")

3255

2777

3256

2778

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

3257

2779

def RemoveClient(self, object_path):

3258

2780

"D-Bus method"

3259

for c in tcp_server.clients.values():

2781

for c in tcp_server.clients.itervalues():

3260

2782

if c.dbus_object_path == object_path:

3261

2783

del tcp_server.clients[c.name]

3262

2784

c.remove_from_connection()

3263

# Don't signal the disabling

2785

# Don't signal anything except ClientRemoved

3264

2786

c.disable(quiet=True)

3265

# Emit D-Bus signal for removal

3266

self.client_removed_signal(c)

2787

# Emit D-Bus signal

2788

self.ClientRemoved(object_path, c.name)

3267

2789

return

3268

2790

raise KeyError(object_path)

3269

2791

3270

2792

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

2793

3308

2794

mandos_dbus_service = MandosDBusService()

3309

2795

3322

2808

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

3323

2809

clients = {}

3324

2810

with PGPEngine() as pgp:

3325

for client in tcp_server.clients.values():

2811

for client in tcp_server.clients.itervalues():

3326

2812

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

3327

2813

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

3328

2814

key)

3352

2838

prefix='clients-',

3353

2839

dir=os.path.dirname(stored_state_path),

3354

2840

delete=False) as stored_state:

3355

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

3356

protocol = 2)

2841

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

3357

2842

tempname = stored_state.name

3358

2843

os.rename(tempname, stored_state_path)

3359

2844

except (IOError, OSError) as e:

3375

2860

name, client = tcp_server.clients.popitem()

3376

2861

if use_dbus:

3377

2862

client.remove_from_connection()

3378

# Don't signal the disabling

2863

# Don't signal anything except ClientRemoved

3379

2864

client.disable(quiet=True)

3380

# Emit D-Bus signal for removal

3381

2865

if use_dbus:

3382

mandos_dbus_service.client_removed_signal(client)

2866

# Emit D-Bus signal

2867

mandos_dbus_service.ClientRemoved(

2868

client.dbus_object_path, client.name)

3383

2869

client_settings.clear()

3384

2870

3385

2871

atexit.register(cleanup)

3386

2872

3387

for client in tcp_server.clients.values():

2873

for client in tcp_server.clients.itervalues():

3388

2874

if use_dbus:

3389

# Emit D-Bus signal for adding

3390

mandos_dbus_service.client_added_signal(client)

2875

# Emit D-Bus signal

2876

mandos_dbus_service.ClientAdded(client.dbus_object_path)

3391

2877

# Need to initiate checking of clients

3392

2878

if client.enabled:

3393

2879

client.init_checker()

3419

2905

sys.exit(1)

3420

2906

# End of Avahi example code

3421

2907

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))

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))

3426

2912

3427

2913

logger.debug("Starting main loop")

3428

2914

main_loop.run()