/mandos/trunk : revision 829

1

#!/usr/bin/python2.7

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#!/usr/bin/python

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

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#

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

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

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#

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# Everything else is

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#

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

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

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from __future__ import (division, absolute_import, print_function,

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unicode_literals)

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from future_builtins import *

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try:

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from future_builtins import *

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except ImportError:

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pass

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try:

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import SocketServer as socketserver

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import argparse

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import datetime

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import errno

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import gnutls.crypto

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import gnutls.connection

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import gnutls.errors

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import gnutls.library.functions

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import gnutls.library.constants

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import gnutls.library.types

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try:

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import ConfigParser as configparser

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except ImportError:

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import dbus

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import dbus.service

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try:

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import gobject

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from gi.repository 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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import gobject as GObject

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from dbus.mainloop.glib import DBusGMainLoop

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import ctypes

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import ctypes.util

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if sys.version_info.major == 2:

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str = unicode

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version = "1.6.9"

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version = "1.7.5"

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stored_state_file = "clients.pickle"

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logger = logging.getLogger()

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return interface_index

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def copy_function(func):

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

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if sys.version_info.major == 2:

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return types.FunctionType(func.func_code,

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func.func_globals,

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func.func_name,

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func.func_defaults,

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func.func_closure)

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else:

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return types.FunctionType(func.__code__,

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func.__globals__,

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func.__name__,

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func.__defaults__,

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func.__closure__)

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def initlogger(debug, level=logging.WARNING):

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"""init logger and add loglevel"""

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def __init__(self):

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

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self.gpg = "gpg"

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try:

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

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for line in output.splitlines():

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

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if name == "gpg":

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self.gpg = path

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break

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except OSError as e:

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if e.errno != errno.ENOENT:

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raise

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self.gnupgargs = ['--batch',

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'--home', self.tempdir,

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'--homedir', self.tempdir,

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'--force-mdc',

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'--quiet',

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'--no-use-agent']

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dir=self.tempdir) as passfile:

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passfile.write(passphrase)

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passfile.flush()

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

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

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'--passphrase-file',

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passfile.name]

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+ self.gnupgargs,

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dir = self.tempdir) as passfile:

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passfile.write(passphrase)

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passfile.flush()

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

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

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'--passphrase-file',

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passfile.name]

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+ self.gnupgargs,

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raise PGPError(err)

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return decrypted_plaintext

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# Pretend that we have an Avahi module

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class Avahi(object):

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

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

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

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

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PROTO_INET = 0 # avahi-common/address.h

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PROTO_INET6 = 1 # avahi-common/address.h

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DBUS_NAME = "org.freedesktop.Avahi"

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DBUS_INTERFACE_ENTRY_GROUP = DBUS_NAME + ".EntryGroup"

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DBUS_INTERFACE_SERVER = DBUS_NAME + ".Server"

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DBUS_PATH_SERVER = "/"

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def string_array_to_txt_array(self, t):

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

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

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ENTRY_GROUP_ESTABLISHED = 2 # avahi-common/defs.h

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ENTRY_GROUP_COLLISION = 3 # avahi-common/defs.h

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ENTRY_GROUP_FAILURE = 4 # avahi-common/defs.h

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SERVER_INVALID = 0 # avahi-common/defs.h

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SERVER_REGISTERING = 1 # avahi-common/defs.h

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SERVER_RUNNING = 2 # avahi-common/defs.h

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SERVER_COLLISION = 3 # avahi-common/defs.h

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SERVER_FAILURE = 4 # avahi-common/defs.h

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avahi = Avahi()

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class AvahiError(Exception):

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

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

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self.cleanup()

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elif state == avahi.SERVER_RUNNING:

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self.add()

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try:

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self.add()

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except dbus.exceptions.DBusException as error:

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if (error.get_dbus_name()

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

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logger.info("Local Zeroconf service name"

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" collision.")

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return self.rename(remove=False)

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else:

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

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self.cleanup()

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os._exit(1)

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else:

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if error is None:

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

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.format(self.name)))

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return ret

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# Pretend that we have a GnuTLS module

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class GnuTLS(object):

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

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

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_library = ctypes.cdll.LoadLibrary(

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ctypes.util.find_library("gnutls"))

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_need_version = b"3.3.0"

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def __init__(self):

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

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

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# happens.

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

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

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.format(self._need_version))

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# Unless otherwise indicated, the constants and types below are

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

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# Constants

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E_SUCCESS = 0

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E_INTERRUPTED = -52

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E_AGAIN = -28

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CRT_OPENPGP = 2

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CLIENT = 2

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SHUT_RDWR = 0

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CRD_CERTIFICATE = 1

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E_NO_CERTIFICATE_FOUND = -49

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OPENPGP_FMT_RAW = 0 # gnutls/openpgp.h

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# Types

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class session_int(ctypes.Structure):

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_fields_ = []

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session_t = ctypes.POINTER(session_int)

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class certificate_credentials_st(ctypes.Structure):

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_fields_ = []

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certificate_credentials_t = ctypes.POINTER(

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certificate_credentials_st)

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certificate_type_t = ctypes.c_int

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class datum_t(ctypes.Structure):

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

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('size', ctypes.c_uint)]

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class openpgp_crt_int(ctypes.Structure):

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_fields_ = []

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openpgp_crt_t = ctypes.POINTER(openpgp_crt_int)

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openpgp_crt_fmt_t = ctypes.c_int # gnutls/openpgp.h

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

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credentials_type_t = ctypes.c_int

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transport_ptr_t = ctypes.c_void_p

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close_request_t = ctypes.c_int

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# Exceptions

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class Error(Exception):

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

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# exception might be raised from within GnuTLS.__init__,

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

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# global variable has happened.

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

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

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# code is passed, convert it to a string with

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# gnutls.strerror()

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self.code = code

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if message is None and code is not None:

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message = GnuTLS.strerror(code)

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

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message, *args)

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class CertificateSecurityError(Error):

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pass

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# Classes

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class Credentials(object):

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def __init__(self):

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self._c_object = gnutls.certificate_credentials_t()

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gnutls.certificate_allocate_credentials(

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ctypes.byref(self._c_object))

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self.type = gnutls.CRD_CERTIFICATE

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def __del__(self):

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gnutls.certificate_free_credentials(self._c_object)

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566

class ClientSession(object):

567

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

568

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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588

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:],

594

data_len)

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def bye(self):

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

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# Error handling functions

600

def _error_code(result):

601

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

602

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

603

if result >= 0:

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return result

605

if result == gnutls.E_NO_CERTIFICATE_FOUND:

606

raise gnutls.CertificateSecurityError(code = result)

607

raise gnutls.Error(code = result)

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609

def _retry_on_error(result, func, arguments):

610

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

611

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

612

while result < 0:

613

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

614

return _error_code(result)

615

result = func(*arguments)

616

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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621

# Functions

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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]

629

init.restype = _error_code

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631

set_default_priority = _library.gnutls_set_default_priority

632

set_default_priority.argtypes = [session_t]

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set_default_priority.restype = _error_code

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635

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]

638

record_send.restype = ctypes.c_ssize_t

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record_send.errcheck = _retry_on_error

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641

certificate_allocate_credentials = (

642

_library.gnutls_certificate_allocate_credentials)

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certificate_allocate_credentials.argtypes = [

644

ctypes.POINTER(certificate_credentials_t)]

645

certificate_allocate_credentials.restype = _error_code

646

647

certificate_free_credentials = (

648

_library.gnutls_certificate_free_credentials)

649

certificate_free_credentials.argtypes = [certificate_credentials_t]

650

certificate_free_credentials.restype = None

651

652

handshake_set_private_extensions = (

653

_library.gnutls_handshake_set_private_extensions)

654

handshake_set_private_extensions.argtypes = [session_t,

655

ctypes.c_int]

656

handshake_set_private_extensions.restype = None

657

658

credentials_set = _library.gnutls_credentials_set

659

credentials_set.argtypes = [session_t, credentials_type_t,

660

ctypes.c_void_p]

661

credentials_set.restype = _error_code

662

663

strerror = _library.gnutls_strerror

664

strerror.argtypes = [ctypes.c_int]

665

strerror.restype = ctypes.c_char_p

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667

certificate_type_get = _library.gnutls_certificate_type_get

668

certificate_type_get.argtypes = [session_t]

669

certificate_type_get.restype = _error_code

670

671

certificate_get_peers = _library.gnutls_certificate_get_peers

672

certificate_get_peers.argtypes = [session_t,

673

ctypes.POINTER(ctypes.c_uint)]

674

certificate_get_peers.restype = ctypes.POINTER(datum_t)

675

676

global_set_log_level = _library.gnutls_global_set_log_level

677

global_set_log_level.argtypes = [ctypes.c_int]

678

global_set_log_level.restype = None

679

680

global_set_log_function = _library.gnutls_global_set_log_function

681

global_set_log_function.argtypes = [log_func]

682

global_set_log_function.restype = None

683

684

deinit = _library.gnutls_deinit

685

deinit.argtypes = [session_t]

686

deinit.restype = None

687

688

handshake = _library.gnutls_handshake

689

handshake.argtypes = [session_t]

690

handshake.restype = _error_code

691

handshake.errcheck = _retry_on_error

692

693

transport_set_ptr = _library.gnutls_transport_set_ptr

694

transport_set_ptr.argtypes = [session_t, transport_ptr_t]

695

transport_set_ptr.restype = None

696

697

bye = _library.gnutls_bye

698

bye.argtypes = [session_t, close_request_t]

699

bye.restype = _error_code

700

bye.errcheck = _retry_on_error

701

702

check_version = _library.gnutls_check_version

703

check_version.argtypes = [ctypes.c_char_p]

704

check_version.restype = ctypes.c_char_p

705

706

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

707

708

openpgp_crt_init = _library.gnutls_openpgp_crt_init

709

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

710

openpgp_crt_init.restype = _error_code

711

712

openpgp_crt_import = _library.gnutls_openpgp_crt_import

713

openpgp_crt_import.argtypes = [openpgp_crt_t,

714

ctypes.POINTER(datum_t),

715

openpgp_crt_fmt_t]

716

openpgp_crt_import.restype = _error_code

717

718

openpgp_crt_verify_self = _library.gnutls_openpgp_crt_verify_self

719

openpgp_crt_verify_self.argtypes = [openpgp_crt_t, ctypes.c_uint,

720

ctypes.POINTER(ctypes.c_uint)]

721

openpgp_crt_verify_self.restype = _error_code

722

723

openpgp_crt_deinit = _library.gnutls_openpgp_crt_deinit

724

openpgp_crt_deinit.argtypes = [openpgp_crt_t]

725

openpgp_crt_deinit.restype = None

726

727

openpgp_crt_get_fingerprint = (

728

_library.gnutls_openpgp_crt_get_fingerprint)

729

openpgp_crt_get_fingerprint.argtypes = [openpgp_crt_t,

730

ctypes.c_void_p,

731

ctypes.POINTER(

732

ctypes.c_size_t)]

733

openpgp_crt_get_fingerprint.restype = _error_code

734

735

# Remove non-public functions

736

del _error_code, _retry_on_error

737

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

738

gnutls = GnuTLS()

739

740

def call_pipe(connection, # : multiprocessing.Connection

741

func, *args, **kwargs):

742

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

743

744

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

745

return value on the provided multiprocessing.Connection.

746

"""

747

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

748

connection.close()

427

749

428

750

class Client(object):

429

751

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

435

757

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

436

758

to see if the client lives.

437

759

'None' if no process is running.

438

checker_callback_tag: a gobject event source tag, or None

760

checker_callback_tag: a GObject event source tag, or None

439

761

checker_command: string; External command which is run to check

440

762

if client lives. %() expansions are done at

441

763

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

442

764

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

443

checker_initiator_tag: a gobject event source tag, or None

765

checker_initiator_tag: a GObject event source tag, or None

444

766

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

445

767

client_structure: Object describing what attributes a client has

446

768

and is used for storing the client at exit

447

769

current_checker_command: string; current running checker_command

448

disable_initiator_tag: a gobject event source tag, or None

770

disable_initiator_tag: a GObject event source tag, or None

449

771

enabled: bool()

450

772

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

451

773

uniquely identify the client

456

778

last_checker_status: integer between 0 and 255 reflecting exit

457

779

status of last checker. -1 reflects crashed

458

780

checker, -2 means no checker completed yet.

781

last_checker_signal: The signal which killed the last checker, if

782

last_checker_status is -1

459

783

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

460

784

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

461

785

D-Bus identifiers

512

836

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

513

837

.replace(" ", ""))

514

838

if "secret" in section:

515

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

839

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

840

.encode("utf-8"),

841

"base64")

516

842

elif "secfile" in section:

517

843

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

518

844

(section["secfile"])),

571

897

self.changedstate = multiprocessing_manager.Condition(

572

898

multiprocessing_manager.Lock())

573

899

self.client_structure = [attr

574

for attr in self.__dict__.iterkeys()

900

for attr in self.__dict__.keys()

575

901

if not attr.startswith("_")]

576

902

self.client_structure.append("client_structure")

577

903

603

929

if not quiet:

604

930

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

605

931

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

606

gobject.source_remove(self.disable_initiator_tag)

932

GObject.source_remove(self.disable_initiator_tag)

607

933

self.disable_initiator_tag = None

608

934

self.expires = None

609

935

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

610

gobject.source_remove(self.checker_initiator_tag)

936

GObject.source_remove(self.checker_initiator_tag)

611

937

self.checker_initiator_tag = None

612

938

self.stop_checker()

613

939

self.enabled = False

614

940

if not quiet:

615

941

self.send_changedstate()

616

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

942

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

617

943

return False

618

944

619

945

def __del__(self):

623

949

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

624

950

# and every interval from then on.

625

951

if self.checker_initiator_tag is not None:

626

gobject.source_remove(self.checker_initiator_tag)

627

self.checker_initiator_tag = gobject.timeout_add(

952

GObject.source_remove(self.checker_initiator_tag)

953

self.checker_initiator_tag = GObject.timeout_add(

628

954

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

629

955

self.start_checker)

630

956

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

631

957

if self.disable_initiator_tag is not None:

632

gobject.source_remove(self.disable_initiator_tag)

633

self.disable_initiator_tag = gobject.timeout_add(

958

GObject.source_remove(self.disable_initiator_tag)

959

self.disable_initiator_tag = GObject.timeout_add(

634

960

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

635

961

# Also start a new checker *right now*.

636

962

self.start_checker()

637

963

638

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

964

def checker_callback(self, source, condition, connection,

965

command):

639

966

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

640

967

self.checker_callback_tag = None

641

968

self.checker = None

642

if os.WIFEXITED(condition):

643

self.last_checker_status = os.WEXITSTATUS(condition)

969

# Read return code from connection (see call_pipe)

970

returncode = connection.recv()

971

connection.close()

972

973

if returncode >= 0:

974

self.last_checker_status = returncode

975

self.last_checker_signal = None

644

976

if self.last_checker_status == 0:

645

977

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

646

978

vars(self))

649

981

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

650

982

else:

651

983

self.last_checker_status = -1

984

self.last_checker_signal = -returncode

652

985

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

653

986

vars(self))

987

return False

654

988

655

989

def checked_ok(self):

656

990

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

657

991

self.last_checked_ok = datetime.datetime.utcnow()

658

992

self.last_checker_status = 0

993

self.last_checker_signal = None

659

994

self.bump_timeout()

660

995

661

996

def bump_timeout(self, timeout=None):

663

998

if timeout is None:

664

999

timeout = self.timeout

665

1000

if self.disable_initiator_tag is not None:

666

gobject.source_remove(self.disable_initiator_tag)

1001

GObject.source_remove(self.disable_initiator_tag)

667

1002

self.disable_initiator_tag = None

668

1003

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

669

self.disable_initiator_tag = gobject.timeout_add(

1004

self.disable_initiator_tag = GObject.timeout_add(

670

1005

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

671

1006

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

672

1007

687

1022

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

688

1023

# should be.

689

1024

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)

1025

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

1026

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

1027

self.checker.join()

1028

self.checker = None

704

1029

# Start a new checker if needed

705

1030

if self.checker is None:

706

1031

# Escape attributes for the shell

715

1040

exc_info=error)

716

1041

return True # Try again later

717

1042

self.current_checker_command = command

718

try:

719

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

720

self.name)

721

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

722

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

723

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

724

# always replaced by /dev/null.)

725

# The exception is when not debugging but nevertheless

726

# running in the foreground; use the previously

727

# created wnull.

728

popen_args = {}

729

if (not self.server_settings["debug"]

730

and self.server_settings["foreground"]):

731

popen_args.update({"stdout": wnull,

732

"stderr": wnull })

733

self.checker = subprocess.Popen(command,

734

close_fds=True,

735

shell=True,

736

cwd="/",

737

**popen_args)

738

except OSError as error:

739

logger.error("Failed to start subprocess",

740

exc_info=error)

741

return True

742

self.checker_callback_tag = gobject.child_watch_add(

743

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

744

# The checker may have completed before the gobject

745

# watch was added. Check for this.

746

try:

747

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

748

except OSError as error:

749

if error.errno == errno.ECHILD:

750

# This should never happen

751

logger.error("Child process vanished",

752

exc_info=error)

753

return True

754

raise

755

if pid:

756

gobject.source_remove(self.checker_callback_tag)

757

self.checker_callback(pid, status, command)

758

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

1043

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

1044

self.name)

1045

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

1046

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

1047

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

1048

# always replaced by /dev/null.)

1049

# The exception is when not debugging but nevertheless

1050

# running in the foreground; use the previously

1051

# created wnull.

1052

popen_args = { "close_fds": True,

1053

"shell": True,

1054

"cwd": "/" }

1055

if (not self.server_settings["debug"]

1056

and self.server_settings["foreground"]):

1057

popen_args.update({"stdout": wnull,

1058

"stderr": wnull })

1059

pipe = multiprocessing.Pipe(duplex = False)

1060

self.checker = multiprocessing.Process(

1061

target = call_pipe,

1062

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

1063

kwargs = popen_args)

1064

self.checker.start()

1065

self.checker_callback_tag = GObject.io_add_watch(

1066

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

1067

self.checker_callback, pipe[0], command)

1068

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

759

1069

return True

760

1070

761

1071

def stop_checker(self):

762

1072

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

763

1073

if self.checker_callback_tag:

764

gobject.source_remove(self.checker_callback_tag)

1074

GObject.source_remove(self.checker_callback_tag)

765

1075

self.checker_callback_tag = None

766

1076

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

767

1077

return

768

1078

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

769

try:

770

self.checker.terminate()

771

#time.sleep(0.5)

772

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

773

# self.checker.kill()

774

except OSError as error:

775

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

776

raise

1079

self.checker.terminate()

777

1080

self.checker = None

778

1081

779

1082

843

1146

access="r")

844

1147

def Property_dbus_property(self):

845

1148

return dbus.Boolean(False)

1149

1150

See also the DBusObjectWithAnnotations class.

846

1151

"""

847

1152

848

1153

def decorator(func):

870

1175

pass

871

1176

872

1177

873

class DBusObjectWithProperties(dbus.service.Object):

874

"""A D-Bus object with properties.

1178

class DBusObjectWithAnnotations(dbus.service.Object):

1179

"""A D-Bus object with annotations.

875

1180

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.

1181

Classes inheriting from this can use the dbus_annotations

1182

decorator to add annotations to methods or signals.

879

1183

"""

880

1184

881

1185

@staticmethod

897

1201

for name, athing in

898

1202

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

899

1203

1204

@dbus.service.method(dbus.INTROSPECTABLE_IFACE,

1205

out_signature = "s",

1206

path_keyword = 'object_path',

1207

connection_keyword = 'connection')

1208

def Introspect(self, object_path, connection):

1209

"""Overloading of standard D-Bus method.

1210

1211

Inserts annotation tags on methods and signals.

1212

"""

1213

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

1214

connection)

1215

try:

1216

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

1217

1218

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

1219

# Add annotation tags

1220

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

1221

for tag in if_tag.getElementsByTagName(typ):

1222

annots = dict()

1223

for name, prop in (self.

1224

_get_all_dbus_things(typ)):

1225

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

1226

and prop._dbus_interface

1227

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

1228

annots.update(getattr(

1229

prop, "_dbus_annotations", {}))

1230

for name, value in annots.items():

1231

ann_tag = document.createElement(

1232

"annotation")

1233

ann_tag.setAttribute("name", name)

1234

ann_tag.setAttribute("value", value)

1235

tag.appendChild(ann_tag)

1236

# Add interface annotation tags

1237

for annotation, value in dict(

1238

itertools.chain.from_iterable(

1239

annotations().items()

1240

for name, annotations

1241

in self._get_all_dbus_things("interface")

1242

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

1243

)).items():

1244

ann_tag = document.createElement("annotation")

1245

ann_tag.setAttribute("name", annotation)

1246

ann_tag.setAttribute("value", value)

1247

if_tag.appendChild(ann_tag)

1248

# Fix argument name for the Introspect method itself

1249

if (if_tag.getAttribute("name")

1250

== dbus.INTROSPECTABLE_IFACE):

1251

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

1252

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

1253

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

1254

if (arg.getAttribute("direction")

1255

== "out"):

1256

arg.setAttribute("name",

1257

"xml_data")

1258

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

1259

document.unlink()

1260

except (AttributeError, xml.dom.DOMException,

1261

xml.parsers.expat.ExpatError) as error:

1262

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

1263

exc_info=error)

1264

return xmlstring

1265

1266

1267

class DBusObjectWithProperties(DBusObjectWithAnnotations):

1268

"""A D-Bus object with properties.

1269

1270

Classes inheriting from this can use the dbus_service_property

1271

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

1272

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

1273

"""

1274

900

1275

def _get_dbus_property(self, interface_name, property_name):

901

1276

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

902

1277

property with the specified name and interface.

912

1287

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

913

1288

self.dbus_object_path, interface_name, property_name))

914

1289

1290

@classmethod

1291

def _get_all_interface_names(cls):

1292

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

1293

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

1294

"_dbus_interface", None)

1295

for x in (inspect.getmro(cls))

1296

for attr in dir(x))

1297

if name is not None)

1298

915

1299

@dbus.service.method(dbus.PROPERTIES_IFACE,

916

1300

in_signature="ss",

917

1301

out_signature="v")

987

1371

988

1372

Inserts property tags and interface annotation tags.

989

1373

"""

990

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

991

connection)

1374

xmlstring = DBusObjectWithAnnotations.Introspect(self,

1375

object_path,

1376

connection)

992

1377

try:

993

1378

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

994

1379

1007

1392

if prop._dbus_interface

1008

1393

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

1009

1394

if_tag.appendChild(tag)

1010

# Add annotation tags

1011

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

1012

for tag in if_tag.getElementsByTagName(typ):

1013

annots = dict()

1014

for name, prop in (self.

1015

_get_all_dbus_things(typ)):

1016

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

1017

and prop._dbus_interface

1018

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

1019

annots.update(getattr(

1020

prop, "_dbus_annotations", {}))

1021

for name, value in annots.items():

1022

ann_tag = document.createElement(

1023

"annotation")

1024

ann_tag.setAttribute("name", name)

1025

ann_tag.setAttribute("value", value)

1026

tag.appendChild(ann_tag)

1027

# Add interface annotation tags

1028

for annotation, value in dict(

1029

itertools.chain.from_iterable(

1030

annotations().items()

1031

for name, annotations

1032

in self._get_all_dbus_things("interface")

1033

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

1034

)).items():

1035

ann_tag = document.createElement("annotation")

1036

ann_tag.setAttribute("name", annotation)

1037

ann_tag.setAttribute("value", value)

1038

if_tag.appendChild(ann_tag)

1395

# Add annotation tags for properties

1396

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

1397

annots = dict()

1398

for name, prop in self._get_all_dbus_things(

1399

"property"):

1400

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

1401

and prop._dbus_interface

1402

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

1403

annots.update(getattr(

1404

prop, "_dbus_annotations", {}))

1405

for name, value in annots.items():

1406

ann_tag = document.createElement(

1407

"annotation")

1408

ann_tag.setAttribute("name", name)

1409

ann_tag.setAttribute("value", value)

1410

tag.appendChild(ann_tag)

1039

1411

# Add the names to the return values for the

1040

1412

# "org.freedesktop.DBus.Properties" methods

1041

1413

if (if_tag.getAttribute("name")

1059

1431

exc_info=error)

1060

1432

return xmlstring

1061

1433

1434

try:

1435

dbus.OBJECT_MANAGER_IFACE

1436

except AttributeError:

1437

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

1438

1439

class DBusObjectWithObjectManager(DBusObjectWithAnnotations):

1440

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

1441

1442

Classes inheriting from this exposes the standard

1443

GetManagedObjects call and the InterfacesAdded and

1444

InterfacesRemoved signals on the standard

1445

"org.freedesktop.DBus.ObjectManager" interface.

1446

1447

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

1448

manually.

1449

"""

1450

@dbus.service.method(dbus.OBJECT_MANAGER_IFACE,

1451

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

1452

def GetManagedObjects(self):

1453

"""This function must be overridden"""

1454

raise NotImplementedError()

1455

1456

@dbus.service.signal(dbus.OBJECT_MANAGER_IFACE,

1457

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

1458

def InterfacesAdded(self, object_path, interfaces_and_properties):

1459

pass

1460

1461

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

1462

def InterfacesRemoved(self, object_path, interfaces):

1463

pass

1464

1465

@dbus.service.method(dbus.INTROSPECTABLE_IFACE,

1466

out_signature = "s",

1467

path_keyword = 'object_path',

1468

connection_keyword = 'connection')

1469

def Introspect(self, object_path, connection):

1470

"""Overloading of standard D-Bus method.

1471

1472

Override return argument name of GetManagedObjects to be

1473

"objpath_interfaces_and_properties"

1474

"""

1475

xmlstring = DBusObjectWithAnnotations.Introspect(self,

1476

object_path,

1477

connection)

1478

try:

1479

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

1480

1481

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

1482

# Fix argument name for the GetManagedObjects method

1483

if (if_tag.getAttribute("name")

1484

== dbus.OBJECT_MANAGER_IFACE):

1485

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

1486

if (cn.getAttribute("name")

1487

== "GetManagedObjects"):

1488

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

1489

if (arg.getAttribute("direction")

1490

== "out"):

1491

arg.setAttribute(

1492

"name",

1493

"objpath_interfaces"

1494

"_and_properties")

1495

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

1496

document.unlink()

1497

except (AttributeError, xml.dom.DOMException,

1498

xml.parsers.expat.ExpatError) as error:

1499

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

1500

exc_info = error)

1501

return xmlstring

1062

1502

1063

1503

def datetime_to_dbus(dt, variant_level=0):

1064

1504

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

1113

1553

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

1114

1554

# Extract the original non-method undecorated

1115

1555

# function by black magic

1116

nonmethod_func = (dict(

1117

zip(attribute.func_code.co_freevars,

1118

attribute.__closure__))

1119

["func"].cell_contents)

1556

if sys.version_info.major == 2:

1557

nonmethod_func = (dict(

1558

zip(attribute.func_code.co_freevars,

1559

attribute.__closure__))

1560

["func"].cell_contents)

1561

else:

1562

nonmethod_func = (dict(

1563

zip(attribute.__code__.co_freevars,

1564

attribute.__closure__))

1565

["func"].cell_contents)

1120

1566

# Create a new, but exactly alike, function

1121

1567

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

1122

1568

# with the alternate D-Bus interface name

1569

new_function = copy_function(nonmethod_func)

1123

1570

new_function = (dbus.service.signal(

1124

alt_interface, attribute._dbus_signature)

1125

(types.FunctionType(

1126

nonmethod_func.func_code,

1127

nonmethod_func.func_globals,

1128

nonmethod_func.func_name,

1129

nonmethod_func.func_defaults,

1130

nonmethod_func.func_closure)))

1571

alt_interface,

1572

attribute._dbus_signature)(new_function))

1131

1573

# Copy annotations, if any

1132

1574

try:

1133

1575

new_function._dbus_annotations = dict(

1143

1585

func1 and func2 to the "call_both" function

1144

1586

outside of its arguments"""

1145

1587

1588

@functools.wraps(func2)

1146

1589

def call_both(*args, **kwargs):

1147

1590

"""This function will emit two D-Bus

1148

1591

signals by calling func1 and func2"""

1149

1592

func1(*args, **kwargs)

1150

1593

func2(*args, **kwargs)

1594

# Make wrapper function look like a D-Bus signal

1595

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

1596

if name.startswith("_dbus_"):

1597

setattr(call_both, name, attr)

1151

1598

1152

1599

return call_both

1153

1600

# Create the "call_both" function and add it to

1164

1611

alt_interface,

1165

1612

attribute._dbus_in_signature,

1166

1613

attribute._dbus_out_signature)

1167

(types.FunctionType(attribute.func_code,

1168

attribute.func_globals,

1169

attribute.func_name,

1170

attribute.func_defaults,

1171

attribute.func_closure)))

1614

(copy_function(attribute)))

1172

1615

# Copy annotations, if any

1173

1616

try:

1174

1617

attr[attrname]._dbus_annotations = dict(

1186

1629

attribute._dbus_access,

1187

1630

attribute._dbus_get_args_options

1188

1631

["byte_arrays"])

1189

(types.FunctionType(

1190

attribute.func_code,

1191

attribute.func_globals,

1192

attribute.func_name,

1193

attribute.func_defaults,

1194

attribute.func_closure)))

1632

(copy_function(attribute)))

1195

1633

# Copy annotations, if any

1196

1634

try:

1197

1635

attr[attrname]._dbus_annotations = dict(

1206

1644

# to the class.

1207

1645

attr[attrname] = (

1208

1646

dbus_interface_annotations(alt_interface)

1209

(types.FunctionType(attribute.func_code,

1210

attribute.func_globals,

1211

attribute.func_name,

1212

attribute.func_defaults,

1213

attribute.func_closure)))

1647

(copy_function(attribute)))

1214

1648

if deprecate:

1215

1649

# Deprecate all alternate interfaces

1216

1650

iname="_AlternateDBusNames_interface_annotation{}"

1229

1663

if interface_names:

1230

1664

# Replace the class with a new subclass of it with

1231

1665

# methods, signals, etc. as created above.

1232

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

1233

(cls, ), attr)

1666

if sys.version_info.major == 2:

1667

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

1668

(cls, ), attr)

1669

else:

1670

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

1671

(cls, ), attr)

1234

1672

return cls

1235

1673

1236

1674

return wrapper

1356

1794

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

1357

1795

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

1358

1796

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)

1797

def checker_callback(self, source, condition,

1798

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

1799

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

1800

connection, command, *args,

1801

**kwargs)

1802

exitstatus = self.last_checker_status

1803

if exitstatus >= 0:

1365

1804

# Emit D-Bus signal

1366

1805

self.CheckerCompleted(dbus.Int16(exitstatus),

1367

dbus.Int64(condition),

1806

# This is specific to GNU libC

1807

dbus.Int64(exitstatus << 8),

1368

1808

dbus.String(command))

1369

1809

else:

1370

1810

# Emit D-Bus signal

1371

1811

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

1372

dbus.Int64(condition),

1812

dbus.Int64(

1813

# This is specific to GNU libC

1814

(exitstatus << 8)

1815

| self.last_checker_signal),

1373

1816

dbus.String(command))

1374

1375

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

1376

*args, **kwargs)

1817

return ret

1377

1818

1378

1819

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

1379

1820

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

1391

1832

1392

1833

def approve(self, value=True):

1393

1834

self.approved = value

1394

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

1835

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

1395

1836

* 1000), self._reset_approved)

1396

1837

self.send_changedstate()

1397

1838

1454

1895

self.checked_ok()

1455

1896

1456

1897

# Enable - method

1898

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

1457

1899

@dbus.service.method(_interface)

1458

1900

def Enable(self):

1459

1901

"D-Bus method"

1460

1902

self.enable()

1461

1903

1462

1904

# StartChecker - method

1905

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

1463

1906

@dbus.service.method(_interface)

1464

1907

def StartChecker(self):

1465

1908

"D-Bus method"

1466

1909

self.start_checker()

1467

1910

1468

1911

# Disable - method

1912

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

1469

1913

@dbus.service.method(_interface)

1470

1914

def Disable(self):

1471

1915

"D-Bus method"

1472

1916

self.disable()

1473

1917

1474

1918

# StopChecker - method

1919

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

1475

1920

@dbus.service.method(_interface)

1476

1921

def StopChecker(self):

1477

1922

self.stop_checker()

1513

1958

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

1514

1959

1515

1960

# Name - property

1961

@dbus_annotations(

1962

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

1516

1963

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

1517

1964

def Name_dbus_property(self):

1518

1965

return dbus.String(self.name)

1519

1966

1520

1967

# Fingerprint - property

1968

@dbus_annotations(

1969

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

1521

1970

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

1522

1971

def Fingerprint_dbus_property(self):

1523

1972

return dbus.String(self.fingerprint)

1532

1981

self.host = str(value)

1533

1982

1534

1983

# Created - property

1984

@dbus_annotations(

1985

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

1535

1986

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

1536

1987

def Created_dbus_property(self):

1537

1988

return datetime_to_dbus(self.created)

1598

2049

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

1599

2050

is None):

1600

2051

return

1601

gobject.source_remove(self.disable_initiator_tag)

1602

self.disable_initiator_tag = gobject.timeout_add(

2052

GObject.source_remove(self.disable_initiator_tag)

2053

self.disable_initiator_tag = GObject.timeout_add(

1603

2054

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

1604

2055

self.disable)

1605

2056

1625

2076

return

1626

2077

if self.enabled:

1627

2078

# Reschedule checker run

1628

gobject.source_remove(self.checker_initiator_tag)

1629

self.checker_initiator_tag = gobject.timeout_add(

2079

GObject.source_remove(self.checker_initiator_tag)

2080

self.checker_initiator_tag = GObject.timeout_add(

1630

2081

value, self.start_checker)

1631

2082

self.start_checker() # Start one now, too

1632

2083

1652

2103

self.stop_checker()

1653

2104

1654

2105

# ObjectPath - property

2106

@dbus_annotations(

2107

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

2108

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

1655

2109

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

1656

2110

def ObjectPath_dbus_property(self):

1657

2111

return self.dbus_object_path # is already a dbus.ObjectPath

1658

2112

1659

2113

# Secret = property

2114

@dbus_annotations(

2115

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

2116

"invalidates"})

1660

2117

@dbus_service_property(_interface,

1661

2118

signature="ay",

1662

2119

access="write",

1708

2165

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

1709

2166

self.server.child_pipe.fileno())

1710

2167

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.

2168

session = gnutls.ClientSession(self.request)

1718

2169

1719

2170

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

1720

2171

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

1724

2175

priority = self.server.gnutls_priority

1725

2176

if priority is None:

1726

2177

priority = "NORMAL"

1727

gnutls.library.functions.gnutls_priority_set_direct(

1728

session._c_object, priority, None)

2178

gnutls.priority_set_direct(session._c_object, priority,

2179

None)

1729

2180

1730

2181

# Start communication using the Mandos protocol

1731

2182

# Get protocol number

1741

2192

# Start GnuTLS connection

1742

2193

try:

1743

2194

session.handshake()

1744

except gnutls.errors.GNUTLSError as error:

2195

except gnutls.Error as error:

1745

2196

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

1746

2197

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

1747

2198

# established. Just abandon the request.

1753

2204

try:

1754

2205

fpr = self.fingerprint(

1755

2206

self.peer_certificate(session))

1756

except (TypeError,

1757

gnutls.errors.GNUTLSError) as error:

2207

except (TypeError, gnutls.Error) as error:

1758

2208

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

1759

2209

return

1760

2210

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

1818

2268

else:

1819

2269

delay -= time2 - time

1820

2270

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

2271

try:

2272

session.send(client.secret)

2273

except gnutls.Error as error:

2274

logger.warning("gnutls send failed",

2275

exc_info = error)

2276

return

1833

2277

1834

2278

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

1835

2279

# bump the timeout using extended_timeout

1843

2287

client.approvals_pending -= 1

1844

2288

try:

1845

2289

session.bye()

1846

except gnutls.errors.GNUTLSError as error:

2290

except gnutls.Error as error:

1847

2291

logger.warning("GnuTLS bye failed",

1848

2292

exc_info=error)

1849

2293

1851

2295

def peer_certificate(session):

1852

2296

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

1853

2297

# If not an OpenPGP certificate...

1854

if (gnutls.library.functions.gnutls_certificate_type_get(

1855

session._c_object)

1856

!= gnutls.library.constants.GNUTLS_CRT_OPENPGP):

1857

# ...do the normal thing

1858

return session.peer_certificate

2298

if (gnutls.certificate_type_get(session._c_object)

2299

!= gnutls.CRT_OPENPGP):

2300

# ...return invalid data

2301

return b""

1859

2302

list_size = ctypes.c_uint(1)

1860

cert_list = (gnutls.library.functions

1861

.gnutls_certificate_get_peers

2303

cert_list = (gnutls.certificate_get_peers

1862

2304

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

1863

2305

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

1864

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

1865

" certificate")

2306

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

1866

2307

if list_size.value == 0:

1867

2308

return None

1868

2309

cert = cert_list[0]

1872

2313

def fingerprint(openpgp):

1873

2314

"Convert an OpenPGP bytestring to a hexdigit fingerprint"

1874

2315

# New GnuTLS "datum" with the OpenPGP public key

1875

datum = gnutls.library.types.gnutls_datum_t(

2316

datum = gnutls.datum_t(

1876

2317

ctypes.cast(ctypes.c_char_p(openpgp),

1877

2318

ctypes.POINTER(ctypes.c_ubyte)),

1878

2319

ctypes.c_uint(len(openpgp)))

1879

2320

# New empty GnuTLS certificate

1880

crt = gnutls.library.types.gnutls_openpgp_crt_t()

1881

gnutls.library.functions.gnutls_openpgp_crt_init(

1882

ctypes.byref(crt))

2321

crt = gnutls.openpgp_crt_t()

2322

gnutls.openpgp_crt_init(ctypes.byref(crt))

1883

2323

# Import the OpenPGP public key into the certificate

1884

gnutls.library.functions.gnutls_openpgp_crt_import(

1885

crt, ctypes.byref(datum),

1886

gnutls.library.constants.GNUTLS_OPENPGP_FMT_RAW)

2324

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

2325

gnutls.OPENPGP_FMT_RAW)

1887

2326

# Verify the self signature in the key

1888

2327

crtverify = ctypes.c_uint()

1889

gnutls.library.functions.gnutls_openpgp_crt_verify_self(

1890

crt, 0, ctypes.byref(crtverify))

2328

gnutls.openpgp_crt_verify_self(crt, 0,

2329

ctypes.byref(crtverify))

1891

2330

if crtverify.value != 0:

1892

gnutls.library.functions.gnutls_openpgp_crt_deinit(crt)

1893

raise gnutls.errors.CertificateSecurityError(

1894

"Verify failed")

2331

gnutls.openpgp_crt_deinit(crt)

2332

raise gnutls.CertificateSecurityError("Verify failed")

1895

2333

# New buffer for the fingerprint

1896

2334

buf = ctypes.create_string_buffer(20)

1897

2335

buf_len = ctypes.c_size_t()

1898

2336

# Get the fingerprint from the certificate into the buffer

1899

gnutls.library.functions.gnutls_openpgp_crt_get_fingerprint(

1900

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

2337

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

2338

ctypes.byref(buf_len))

1901

2339

# Deinit the certificate

1902

gnutls.library.functions.gnutls_openpgp_crt_deinit(crt)

2340

gnutls.openpgp_crt_deinit(crt)

1903

2341

# Convert the buffer to a Python bytestring

1904

2342

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

1905

2343

# Convert the bytestring to hexadecimal notation

2049

2487

gnutls_priority GnuTLS priority string

2050

2488

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

2051

2489

2052

Assumes a gobject.MainLoop event loop.

2490

Assumes a GObject.MainLoop event loop.

2053

2491

"""

2054

2492

2055

2493

def __init__(self, server_address, RequestHandlerClass,

2080

2518

2081

2519

def add_pipe(self, parent_pipe, proc):

2082

2520

# Call "handle_ipc" for both data and EOF events

2083

gobject.io_add_watch(

2521

GObject.io_add_watch(

2084

2522

parent_pipe.fileno(),

2085

gobject.IO_IN | gobject.IO_HUP,

2523

GObject.IO_IN | GObject.IO_HUP,

2086

2524

functools.partial(self.handle_ipc,

2087

2525

parent_pipe = parent_pipe,

2088

2526

proc = proc))

2092

2530

proc = None,

2093

2531

client_object=None):

2094

2532

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

2095

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

2533

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

2096

2534

# Wait for other process to exit

2097

2535

proc.join()

2098

2536

return False

2105

2543

fpr = request[1]

2106

2544

address = request[2]

2107

2545

2108

for c in self.clients.itervalues():

2546

for c in self.clients.values():

2109

2547

if c.fingerprint == fpr:

2110

2548

client = c

2111

2549

break

2119

2557

parent_pipe.send(False)

2120

2558

return False

2121

2559

2122

gobject.io_add_watch(

2560

GObject.io_add_watch(

2123

2561

parent_pipe.fileno(),

2124

gobject.IO_IN | gobject.IO_HUP,

2562

GObject.IO_IN | GObject.IO_HUP,

2125

2563

functools.partial(self.handle_ipc,

2126

2564

parent_pipe = parent_pipe,

2127

2565

proc = proc,

2141

2579

2142

2580

if command == 'getattr':

2143

2581

attrname = request[1]

2144

if callable(client_object.__getattribute__(attrname)):

2582

if isinstance(client_object.__getattribute__(attrname),

2583

collections.Callable):

2145

2584

parent_pipe.send(('function', ))

2146

2585

else:

2147

2586

parent_pipe.send((

2182

2621

# avoid excessive use of external libraries.

2183

2622

2184

2623

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

2185

Token = collections.namedtuple("Token",

2186

("regexp", # To match token; if

2187

# "value" is not None,

2188

# must have a "group"

2189

# containing digits

2190

"value", # datetime.timedelta or

2191

# None

2192

"followers")) # Tokens valid after

2193

# this token

2194

2624

Token = collections.namedtuple("Token", (

2195

2625

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

2196

2626

# a "group" containing digits

2231

2661

# Define starting values

2232

2662

value = datetime.timedelta() # Value so far

2233

2663

found_token = None

2234

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

2664

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

2235

2665

s = duration # String left to parse

2236

2666

# Loop until end token is found

2237

2667

while found_token is not token_end:

2394

2824

"debug": "False",

2395

2825

"priority":

2396

2826

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

2397

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

2827

":+SIGN-DSA-SHA256",

2398

2828

"servicename": "Mandos",

2399

2829

"use_dbus": "True",

2400

2830

"use_ipv6": "True",

2517

2947

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

2518

2948

exc_info=e)

2519

2949

2520

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

2950

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

2951

("mandos", "mandos"),

2952

("nobody", "nogroup")):

2521

2953

try:

2522

2954

uid = pwd.getpwnam(name).pw_uid

2523

gid = pwd.getpwnam(name).pw_gid

2955

gid = pwd.getpwnam(group).pw_gid

2524

2956

break

2525

2957

except KeyError:

2526

2958

continue

2530

2962

try:

2531

2963

os.setgid(gid)

2532

2964

os.setuid(uid)

2965

if debug:

2966

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

2967

gid))

2533

2968

except OSError as error:

2969

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

2970

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

2534

2971

if error.errno != errno.EPERM:

2535

2972

raise

2536

2973

2539

2976

2540

2977

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

2541

2978

# - GnuTLS manual

2542

gnutls.library.functions.gnutls_global_set_log_level(11)

2979

gnutls.global_set_log_level(11)

2543

2980

2544

@gnutls.library.types.gnutls_log_func

2981

@gnutls.log_func

2545

2982

def debug_gnutls(level, string):

2546

2983

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

2547

2984

2548

gnutls.library.functions.gnutls_global_set_log_function(

2549

debug_gnutls)

2985

gnutls.global_set_log_function(debug_gnutls)

2550

2986

2551

2987

# Redirect stdin so all checkers get /dev/null

2552

2988

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

2559

2995

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

2560

2996

daemon()

2561

2997

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

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

2999

# need to inform GObject that threads will be used.

3000

GObject.threads_init()

2565

3001

2566

3002

global main_loop

2567

3003

# From the Avahi example code

2568

3004

DBusGMainLoop(set_as_default=True)

2569

main_loop = gobject.MainLoop()

3005

main_loop = GObject.MainLoop()

2570

3006

bus = dbus.SystemBus()

2571

3007

# End of Avahi example code

2572

3008

if use_dbus:

2616

3052

if server_settings["restore"]:

2617

3053

try:

2618

3054

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

2619

clients_data, old_client_settings = pickle.load(

2620

stored_state)

3055

if sys.version_info.major == 2:

3056

clients_data, old_client_settings = pickle.load(

3057

stored_state)

3058

else:

3059

bytes_clients_data, bytes_old_client_settings = (

3060

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

3061

### Fix bytes to strings

3062

## clients_data

3063

# .keys()

3064

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

3065

if isinstance(key, bytes)

3066

else key): value

3067

for key, value in

3068

bytes_clients_data.items() }

3069

del bytes_clients_data

3070

for key in clients_data:

3071

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

3072

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

3073

for k, v in

3074

clients_data[key].items() }

3075

clients_data[key] = value

3076

# .client_structure

3077

value["client_structure"] = [

3078

(s.decode("utf-8")

3079

if isinstance(s, bytes)

3080

else s) for s in

3081

value["client_structure"] ]

3082

# .name & .host

3083

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

3084

if isinstance(value[k], bytes):

3085

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

3086

## old_client_settings

3087

# .keys()

3088

old_client_settings = {

3089

(key.decode("utf-8")

3090

if isinstance(key, bytes)

3091

else key): value

3092

for key, value in

3093

bytes_old_client_settings.items() }

3094

del bytes_old_client_settings

3095

# .host

3096

for value in old_client_settings.values():

3097

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

3098

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

3099

.decode("utf-8"))

2621

3100

os.remove(stored_state_path)

2622

3101

except IOError as e:

2623

3102

if e.errno == errno.ENOENT:

2656

3135

pass

2657

3136

2658

3137

# Clients who has passed its expire date can still be

2659

# enabled if its last checker was successful. Clients

3138

# enabled if its last checker was successful. A Client

2660

3139

# whose checker succeeded before we stored its state is

2661

3140

# assumed to have successfully run all checkers during

2662

3141

# downtime.

2731

3210

2732

3211

@alternate_dbus_interfaces(

2733

3212

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

2734

class MandosDBusService(DBusObjectWithProperties):

3213

class MandosDBusService(DBusObjectWithObjectManager):

2735

3214

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

2736

3215

2737

3216

def __init__(self):

2739

3218

2740

3219

_interface = "se.recompile.Mandos"

2741

3220

2742

@dbus_interface_annotations(_interface)

2743

def _foo(self):

2744

return {

2745

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

2746

"false" }

2747

2748

3221

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

2749

3222

def ClientAdded(self, objpath):

2750

3223

"D-Bus signal"

2755

3228

"D-Bus signal"

2756

3229

pass

2757

3230

3231

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

3232

"true"})

2758

3233

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

2759

3234

def ClientRemoved(self, objpath, name):

2760

3235

"D-Bus signal"

2761

3236

pass

2762

3237

3238

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

3239

"true"})

2763

3240

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

2764

3241

def GetAllClients(self):

2765

3242

"D-Bus method"

2766

3243

return dbus.Array(c.dbus_object_path for c in

2767

tcp_server.clients.itervalues())

3244

tcp_server.clients.values())

2768

3245

3246

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

3247

"true"})

2769

3248

@dbus.service.method(_interface,

2770

3249

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

2771

3250

def GetAllClientsWithProperties(self):

2772

3251

"D-Bus method"

2773

3252

return dbus.Dictionary(

2774

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

2775

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

3253

{ c.dbus_object_path: c.GetAll(

3254

"se.recompile.Mandos.Client")

3255

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

2776

3256

signature="oa{sv}")

2777

3257

2778

3258

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

2779

3259

def RemoveClient(self, object_path):

2780

3260

"D-Bus method"

2781

for c in tcp_server.clients.itervalues():

3261

for c in tcp_server.clients.values():

2782

3262

if c.dbus_object_path == object_path:

2783

3263

del tcp_server.clients[c.name]

2784

3264

c.remove_from_connection()

2785

# Don't signal anything except ClientRemoved

3265

# Don't signal the disabling

2786

3266

c.disable(quiet=True)

2787

# Emit D-Bus signal

2788

self.ClientRemoved(object_path, c.name)

3267

# Emit D-Bus signal for removal

3268

self.client_removed_signal(c)

2789

3269

return

2790

3270

raise KeyError(object_path)

2791

3271

2792

3272

del _interface

3273

3274

@dbus.service.method(dbus.OBJECT_MANAGER_IFACE,

3275

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

3276

def GetManagedObjects(self):

3277

"""D-Bus method"""

3278

return dbus.Dictionary(

3279

{ client.dbus_object_path:

3280

dbus.Dictionary(

3281

{ interface: client.GetAll(interface)

3282

for interface in

3283

client._get_all_interface_names()})

3284

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

3285

3286

def client_added_signal(self, client):

3287

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

3288

if use_dbus:

3289

# New standard signal

3290

self.InterfacesAdded(

3291

client.dbus_object_path,

3292

dbus.Dictionary(

3293

{ interface: client.GetAll(interface)

3294

for interface in

3295

client._get_all_interface_names()}))

3296

# Old signal

3297

self.ClientAdded(client.dbus_object_path)

3298

3299

def client_removed_signal(self, client):

3300

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

3301

if use_dbus:

3302

# New standard signal

3303

self.InterfacesRemoved(

3304

client.dbus_object_path,

3305

client._get_all_interface_names())

3306

# Old signal

3307

self.ClientRemoved(client.dbus_object_path,

3308

client.name)

2793

3309

2794

3310

mandos_dbus_service = MandosDBusService()

2795

3311

2808

3324

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

2809

3325

clients = {}

2810

3326

with PGPEngine() as pgp:

2811

for client in tcp_server.clients.itervalues():

3327

for client in tcp_server.clients.values():

2812

3328

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

2813

3329

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

2814

3330

key)

2838

3354

prefix='clients-',

2839

3355

dir=os.path.dirname(stored_state_path),

2840

3356

delete=False) as stored_state:

2841

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

3357

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

3358

protocol = 2)

2842

3359

tempname = stored_state.name

2843

3360

os.rename(tempname, stored_state_path)

2844

3361

except (IOError, OSError) as e:

2860

3377

name, client = tcp_server.clients.popitem()

2861

3378

if use_dbus:

2862

3379

client.remove_from_connection()

2863

# Don't signal anything except ClientRemoved

3380

# Don't signal the disabling

2864

3381

client.disable(quiet=True)

3382

# Emit D-Bus signal for removal

2865

3383

if use_dbus:

2866

# Emit D-Bus signal

2867

mandos_dbus_service.ClientRemoved(

2868

client.dbus_object_path, client.name)

3384

mandos_dbus_service.client_removed_signal(client)

2869

3385

client_settings.clear()

2870

3386

2871

3387

atexit.register(cleanup)

2872

3388

2873

for client in tcp_server.clients.itervalues():

3389

for client in tcp_server.clients.values():

2874

3390

if use_dbus:

2875

# Emit D-Bus signal

2876

mandos_dbus_service.ClientAdded(client.dbus_object_path)

3391

# Emit D-Bus signal for adding

3392

mandos_dbus_service.client_added_signal(client)

2877

3393

# Need to initiate checking of clients

2878

3394

if client.enabled:

2879

3395

client.init_checker()

2905

3421

sys.exit(1)

2906

3422

# End of Avahi example code

2907

3423

2908

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

3424

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

2909

3425

lambda *args, **kwargs:

2910

3426

(tcp_server.handle_request

2911

3427

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