/mandos/trunk : revision 844

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#!/usr/bin/python2.7

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#!/usr/bin/python

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

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#

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

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

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#

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# Everything else is

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#

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

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

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from __future__ import (division, absolute_import, print_function,

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unicode_literals)

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from future_builtins import *

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try:

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from future_builtins import *

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except ImportError:

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pass

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try:

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import SocketServer as socketserver

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import argparse

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import datetime

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import errno

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import gnutls.crypto

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import gnutls.connection

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import gnutls.errors

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import gnutls.library.functions

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import gnutls.library.constants

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import gnutls.library.types

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try:

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import ConfigParser as configparser

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except ImportError:

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import dbus

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import dbus.service

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try:

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import gobject

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except ImportError:

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from gi.repository import GObject as gobject

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import avahi

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from gi.repository import GLib

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from dbus.mainloop.glib import DBusGMainLoop

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import ctypes

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import ctypes.util

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if sys.version_info.major == 2:

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str = unicode

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version = "1.6.9"

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version = "1.7.7"

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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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.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):

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

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# Error handling functions

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def _error_code(result):

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

599

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

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if result >= 0:

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return result

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if result == gnutls.E_NO_CERTIFICATE_FOUND:

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raise gnutls.CertificateSecurityError(code = result)

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raise gnutls.Error(code = result)

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def _retry_on_error(result, func, arguments):

607

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

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

609

while result < 0:

610

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

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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

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set_default_priority.argtypes = [session_t]

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set_default_priority.restype = _error_code

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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]

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record_send.restype = ctypes.c_ssize_t

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record_send.errcheck = _retry_on_error

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certificate_allocate_credentials = (

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_library.gnutls_certificate_allocate_credentials)

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certificate_allocate_credentials.argtypes = [

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ctypes.POINTER(certificate_credentials_t)]

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certificate_allocate_credentials.restype = _error_code

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certificate_free_credentials = (

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_library.gnutls_certificate_free_credentials)

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certificate_free_credentials.argtypes = [certificate_credentials_t]

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certificate_free_credentials.restype = None

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handshake_set_private_extensions = (

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_library.gnutls_handshake_set_private_extensions)

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handshake_set_private_extensions.argtypes = [session_t,

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ctypes.c_int]

653

handshake_set_private_extensions.restype = None

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655

credentials_set = _library.gnutls_credentials_set

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credentials_set.argtypes = [session_t, credentials_type_t,

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ctypes.c_void_p]

658

credentials_set.restype = _error_code

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strerror = _library.gnutls_strerror

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strerror.argtypes = [ctypes.c_int]

662

strerror.restype = ctypes.c_char_p

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664

certificate_type_get = _library.gnutls_certificate_type_get

665

certificate_type_get.argtypes = [session_t]

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certificate_type_get.restype = _error_code

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certificate_get_peers = _library.gnutls_certificate_get_peers

669

certificate_get_peers.argtypes = [session_t,

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ctypes.POINTER(ctypes.c_uint)]

671

certificate_get_peers.restype = ctypes.POINTER(datum_t)

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global_set_log_level = _library.gnutls_global_set_log_level

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global_set_log_level.argtypes = [ctypes.c_int]

675

global_set_log_level.restype = None

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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

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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

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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

438

737

def call_pipe(connection, # : multiprocessing.Connection

439

738

func, *args, **kwargs):

440

739

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

455

754

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

456

755

to see if the client lives.

457

756

'None' if no process is running.

458

checker_callback_tag: a gobject event source tag, or None

757

checker_callback_tag: a GLib event source tag, or None

459

758

checker_command: string; External command which is run to check

460

759

if client lives. %() expansions are done at

461

760

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

462

761

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

463

checker_initiator_tag: a gobject event source tag, or None

762

checker_initiator_tag: a GLib event source tag, or None

464

763

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

465

764

client_structure: Object describing what attributes a client has

466

765

and is used for storing the client at exit

467

766

current_checker_command: string; current running checker_command

468

disable_initiator_tag: a gobject event source tag, or None

767

disable_initiator_tag: a GLib event source tag, or None

469

768

enabled: bool()

470

769

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

471

770

uniquely identify the client

534

833

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

535

834

.replace(" ", ""))

536

835

if "secret" in section:

537

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

836

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

837

.encode("utf-8"),

838

"base64")

538

839

elif "secfile" in section:

539

840

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

540

841

(section["secfile"])),

593

894

self.changedstate = multiprocessing_manager.Condition(

594

895

multiprocessing_manager.Lock())

595

896

self.client_structure = [attr

596

for attr in self.__dict__.iterkeys()

897

for attr in self.__dict__.keys()

597

898

if not attr.startswith("_")]

598

899

self.client_structure.append("client_structure")

599

900

625

926

if not quiet:

626

927

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

627

928

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

628

gobject.source_remove(self.disable_initiator_tag)

929

GLib.source_remove(self.disable_initiator_tag)

629

930

self.disable_initiator_tag = None

630

931

self.expires = None

631

932

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

632

gobject.source_remove(self.checker_initiator_tag)

933

GLib.source_remove(self.checker_initiator_tag)

633

934

self.checker_initiator_tag = None

634

935

self.stop_checker()

635

936

self.enabled = False

636

937

if not quiet:

637

938

self.send_changedstate()

638

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

939

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

639

940

return False

640

941

641

942

def __del__(self):

645

946

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

646

947

# and every interval from then on.

647

948

if self.checker_initiator_tag is not None:

648

gobject.source_remove(self.checker_initiator_tag)

649

self.checker_initiator_tag = gobject.timeout_add(

949

GLib.source_remove(self.checker_initiator_tag)

950

self.checker_initiator_tag = GLib.timeout_add(

650

951

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

651

952

self.start_checker)

652

953

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

653

954

if self.disable_initiator_tag is not None:

654

gobject.source_remove(self.disable_initiator_tag)

655

self.disable_initiator_tag = gobject.timeout_add(

955

GLib.source_remove(self.disable_initiator_tag)

956

self.disable_initiator_tag = GLib.timeout_add(

656

957

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

657

958

# Also start a new checker *right now*.

658

959

self.start_checker()

694

995

if timeout is None:

695

996

timeout = self.timeout

696

997

if self.disable_initiator_tag is not None:

697

gobject.source_remove(self.disable_initiator_tag)

998

GLib.source_remove(self.disable_initiator_tag)

698

999

self.disable_initiator_tag = None

699

1000

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

700

self.disable_initiator_tag = gobject.timeout_add(

1001

self.disable_initiator_tag = GLib.timeout_add(

701

1002

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

702

1003

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

703

1004

758

1059

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

759

1060

kwargs = popen_args)

760

1061

self.checker.start()

761

self.checker_callback_tag = gobject.io_add_watch(

762

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

1062

self.checker_callback_tag = GLib.io_add_watch(

1063

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

763

1064

self.checker_callback, pipe[0], command)

764

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

1065

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

765

1066

return True

766

1067

767

1068

def stop_checker(self):

768

1069

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

769

1070

if self.checker_callback_tag:

770

gobject.source_remove(self.checker_callback_tag)

1071

GLib.source_remove(self.checker_callback_tag)

771

1072

self.checker_callback_tag = None

772

1073

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

773

1074

return

983

1284

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

984

1285

self.dbus_object_path, interface_name, property_name))

985

1286

1287

@classmethod

1288

def _get_all_interface_names(cls):

1289

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

1290

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

1291

"_dbus_interface", None)

1292

for x in (inspect.getmro(cls))

1293

for attr in dir(x))

1294

if name is not None)

1295

986

1296

@dbus.service.method(dbus.PROPERTIES_IFACE,

987

1297

in_signature="ss",

988

1298

out_signature="v")

1118

1428

exc_info=error)

1119

1429

return xmlstring

1120

1430

1431

try:

1432

dbus.OBJECT_MANAGER_IFACE

1433

except AttributeError:

1434

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

1435

1436

class DBusObjectWithObjectManager(DBusObjectWithAnnotations):

1437

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

1438

1439

Classes inheriting from this exposes the standard

1440

GetManagedObjects call and the InterfacesAdded and

1441

InterfacesRemoved signals on the standard

1442

"org.freedesktop.DBus.ObjectManager" interface.

1443

1444

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

1445

manually.

1446

"""

1447

@dbus.service.method(dbus.OBJECT_MANAGER_IFACE,

1448

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

1449

def GetManagedObjects(self):

1450

"""This function must be overridden"""

1451

raise NotImplementedError()

1452

1453

@dbus.service.signal(dbus.OBJECT_MANAGER_IFACE,

1454

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

1455

def InterfacesAdded(self, object_path, interfaces_and_properties):

1456

pass

1457

1458

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

1459

def InterfacesRemoved(self, object_path, interfaces):

1460

pass

1461

1462

@dbus.service.method(dbus.INTROSPECTABLE_IFACE,

1463

out_signature = "s",

1464

path_keyword = 'object_path',

1465

connection_keyword = 'connection')

1466

def Introspect(self, object_path, connection):

1467

"""Overloading of standard D-Bus method.

1468

1469

Override return argument name of GetManagedObjects to be

1470

"objpath_interfaces_and_properties"

1471

"""

1472

xmlstring = DBusObjectWithAnnotations.Introspect(self,

1473

object_path,

1474

connection)

1475

try:

1476

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

1477

1478

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

1479

# Fix argument name for the GetManagedObjects method

1480

if (if_tag.getAttribute("name")

1481

== dbus.OBJECT_MANAGER_IFACE):

1482

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

1483

if (cn.getAttribute("name")

1484

== "GetManagedObjects"):

1485

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

1486

if (arg.getAttribute("direction")

1487

== "out"):

1488

arg.setAttribute(

1489

"name",

1490

"objpath_interfaces"

1491

"_and_properties")

1492

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

1493

document.unlink()

1494

except (AttributeError, xml.dom.DOMException,

1495

xml.parsers.expat.ExpatError) as error:

1496

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

1497

exc_info = error)

1498

return xmlstring

1121

1499

1122

1500

def datetime_to_dbus(dt, variant_level=0):

1123

1501

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

1170

1548

interface_names.add(alt_interface)

1171

1549

# Is this a D-Bus signal?

1172

1550

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

1551

# Extract the original non-method undecorated

1552

# function by black magic

1173

1553

if sys.version_info.major == 2:

1174

# Extract the original non-method undecorated

1175

# function by black magic

1176

1554

nonmethod_func = (dict(

1177

1555

zip(attribute.func_code.co_freevars,

1178

1556

attribute.__closure__))

1179

1557

["func"].cell_contents)

1180

1558

else:

1181

nonmethod_func = attribute

1559

nonmethod_func = (dict(

1560

zip(attribute.__code__.co_freevars,

1561

attribute.__closure__))

1562

["func"].cell_contents)

1182

1563

# Create a new, but exactly alike, function

1183

1564

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

1184

1565

# with the alternate D-Bus interface name

1185

if sys.version_info.major == 2:

1186

new_function = types.FunctionType(

1187

nonmethod_func.func_code,

1188

nonmethod_func.func_globals,

1189

nonmethod_func.func_name,

1190

nonmethod_func.func_defaults,

1191

nonmethod_func.func_closure)

1192

else:

1193

new_function = types.FunctionType(

1194

nonmethod_func.__code__,

1195

nonmethod_func.__globals__,

1196

nonmethod_func.__name__,

1197

nonmethod_func.__defaults__,

1198

nonmethod_func.__closure__)

1566

new_function = copy_function(nonmethod_func)

1199

1567

new_function = (dbus.service.signal(

1200

1568

alt_interface,

1201

1569

attribute._dbus_signature)(new_function))

1214

1582

func1 and func2 to the "call_both" function

1215

1583

outside of its arguments"""

1216

1584

1585

@functools.wraps(func2)

1217

1586

def call_both(*args, **kwargs):

1218

1587

"""This function will emit two D-Bus

1219

1588

signals by calling func1 and func2"""

1220

1589

func1(*args, **kwargs)

1221

1590

func2(*args, **kwargs)

1591

# Make wrapper function look like a D-Bus signal

1592

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

1593

if name.startswith("_dbus_"):

1594

setattr(call_both, name, attr)

1222

1595

1223

1596

return call_both

1224

1597

# Create the "call_both" function and add it to

1235

1608

alt_interface,

1236

1609

attribute._dbus_in_signature,

1237

1610

attribute._dbus_out_signature)

1238

(types.FunctionType(attribute.func_code,

1239

attribute.func_globals,

1240

attribute.func_name,

1241

attribute.func_defaults,

1242

attribute.func_closure)))

1611

(copy_function(attribute)))

1243

1612

# Copy annotations, if any

1244

1613

try:

1245

1614

attr[attrname]._dbus_annotations = dict(

1257

1626

attribute._dbus_access,

1258

1627

attribute._dbus_get_args_options

1259

1628

["byte_arrays"])

1260

(types.FunctionType(

1261

attribute.func_code,

1262

attribute.func_globals,

1263

attribute.func_name,

1264

attribute.func_defaults,

1265

attribute.func_closure)))

1629

(copy_function(attribute)))

1266

1630

# Copy annotations, if any

1267

1631

try:

1268

1632

attr[attrname]._dbus_annotations = dict(

1277

1641

# to the class.

1278

1642

attr[attrname] = (

1279

1643

dbus_interface_annotations(alt_interface)

1280

(types.FunctionType(attribute.func_code,

1281

attribute.func_globals,

1282

attribute.func_name,

1283

attribute.func_defaults,

1284

attribute.func_closure)))

1644

(copy_function(attribute)))

1285

1645

if deprecate:

1286

1646

# Deprecate all alternate interfaces

1287

1647

iname="_AlternateDBusNames_interface_annotation{}"

1300

1660

if interface_names:

1301

1661

# Replace the class with a new subclass of it with

1302

1662

# methods, signals, etc. as created above.

1303

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

1304

(cls, ), attr)

1663

if sys.version_info.major == 2:

1664

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

1665

(cls, ), attr)

1666

else:

1667

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

1668

(cls, ), attr)

1305

1669

return cls

1306

1670

1307

1671

return wrapper

1465

1829

1466

1830

def approve(self, value=True):

1467

1831

self.approved = value

1468

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

1469

* 1000), self._reset_approved)

1832

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

1833

* 1000), self._reset_approved)

1470

1834

self.send_changedstate()

1471

1835

1472

1836

## D-Bus methods, signals & properties

1682

2046

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

1683

2047

is None):

1684

2048

return

1685

gobject.source_remove(self.disable_initiator_tag)

1686

self.disable_initiator_tag = gobject.timeout_add(

2049

GLib.source_remove(self.disable_initiator_tag)

2050

self.disable_initiator_tag = GLib.timeout_add(

1687

2051

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

1688

2052

self.disable)

1689

2053

1709

2073

return

1710

2074

if self.enabled:

1711

2075

# Reschedule checker run

1712

gobject.source_remove(self.checker_initiator_tag)

1713

self.checker_initiator_tag = gobject.timeout_add(

2076

GLib.source_remove(self.checker_initiator_tag)

2077

self.checker_initiator_tag = GLib.timeout_add(

1714

2078

value, self.start_checker)

1715

2079

self.start_checker() # Start one now, too

1716

2080

1798

2162

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

1799

2163

self.server.child_pipe.fileno())

1800

2164

1801

session = gnutls.connection.ClientSession(

1802

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

1803

1804

# Note: gnutls.connection.X509Credentials is really a

1805

# generic GnuTLS certificate credentials object so long as

1806

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

1807

# here despite using OpenPGP certificates.

2165

session = gnutls.ClientSession(self.request)

1808

2166

1809

2167

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

1810

2168

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

1814

2172

priority = self.server.gnutls_priority

1815

2173

if priority is None:

1816

2174

priority = "NORMAL"

1817

gnutls.library.functions.gnutls_priority_set_direct(

1818

session._c_object, priority, None)

2175

gnutls.priority_set_direct(session._c_object, priority,

2176

None)

1819

2177

1820

2178

# Start communication using the Mandos protocol

1821

2179

# Get protocol number

1831

2189

# Start GnuTLS connection

1832

2190

try:

1833

2191

session.handshake()

1834

except gnutls.errors.GNUTLSError as error:

2192

except gnutls.Error as error:

1835

2193

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

1836

2194

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

1837

2195

# established. Just abandon the request.

1843

2201

try:

1844

2202

fpr = self.fingerprint(

1845

2203

self.peer_certificate(session))

1846

except (TypeError,

1847

gnutls.errors.GNUTLSError) as error:

2204

except (TypeError, gnutls.Error) as error:

1848

2205

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

1849

2206

return

1850

2207

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

1908

2265

else:

1909

2266

delay -= time2 - time

1910

2267

1911

sent_size = 0

1912

while sent_size < len(client.secret):

1913

try:

1914

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

1915

except gnutls.errors.GNUTLSError as error:

1916

logger.warning("gnutls send failed",

1917

exc_info=error)

1918

return

1919

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

1920

len(client.secret) - (sent_size

1921

+ sent))

1922

sent_size += sent

2268

try:

2269

session.send(client.secret)

2270

except gnutls.Error as error:

2271

logger.warning("gnutls send failed",

2272

exc_info = error)

2273

return

1923

2274

1924

2275

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

1925

2276

# bump the timeout using extended_timeout

1933

2284

client.approvals_pending -= 1

1934

2285

try:

1935

2286

session.bye()

1936

except gnutls.errors.GNUTLSError as error:

2287

except gnutls.Error as error:

1937

2288

logger.warning("GnuTLS bye failed",

1938

2289

exc_info=error)

1939

2290

1941

2292

def peer_certificate(session):

1942

2293

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

1943

2294

# If not an OpenPGP certificate...

1944

if (gnutls.library.functions.gnutls_certificate_type_get(

1945

session._c_object)

1946

!= gnutls.library.constants.GNUTLS_CRT_OPENPGP):

1947

# ...do the normal thing

1948

return session.peer_certificate

2295

if (gnutls.certificate_type_get(session._c_object)

2296

!= gnutls.CRT_OPENPGP):

2297

# ...return invalid data

2298

return b""

1949

2299

list_size = ctypes.c_uint(1)

1950

cert_list = (gnutls.library.functions

1951

.gnutls_certificate_get_peers

2300

cert_list = (gnutls.certificate_get_peers

1952

2301

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

1953

2302

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

1954

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

1955

" certificate")

2303

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

1956

2304

if list_size.value == 0:

1957

2305

return None

1958

2306

cert = cert_list[0]

1962

2310

def fingerprint(openpgp):

1963

2311

"Convert an OpenPGP bytestring to a hexdigit fingerprint"

1964

2312

# New GnuTLS "datum" with the OpenPGP public key

1965

datum = gnutls.library.types.gnutls_datum_t(

2313

datum = gnutls.datum_t(

1966

2314

ctypes.cast(ctypes.c_char_p(openpgp),

1967

2315

ctypes.POINTER(ctypes.c_ubyte)),

1968

2316

ctypes.c_uint(len(openpgp)))

1969

2317

# New empty GnuTLS certificate

1970

crt = gnutls.library.types.gnutls_openpgp_crt_t()

1971

gnutls.library.functions.gnutls_openpgp_crt_init(

1972

ctypes.byref(crt))

2318

crt = gnutls.openpgp_crt_t()

2319

gnutls.openpgp_crt_init(ctypes.byref(crt))

1973

2320

# Import the OpenPGP public key into the certificate

1974

gnutls.library.functions.gnutls_openpgp_crt_import(

1975

crt, ctypes.byref(datum),

1976

gnutls.library.constants.GNUTLS_OPENPGP_FMT_RAW)

2321

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

2322

gnutls.OPENPGP_FMT_RAW)

1977

2323

# Verify the self signature in the key

1978

2324

crtverify = ctypes.c_uint()

1979

gnutls.library.functions.gnutls_openpgp_crt_verify_self(

1980

crt, 0, ctypes.byref(crtverify))

2325

gnutls.openpgp_crt_verify_self(crt, 0,

2326

ctypes.byref(crtverify))

1981

2327

if crtverify.value != 0:

1982

gnutls.library.functions.gnutls_openpgp_crt_deinit(crt)

1983

raise gnutls.errors.CertificateSecurityError(

1984

"Verify failed")

2328

gnutls.openpgp_crt_deinit(crt)

2329

raise gnutls.CertificateSecurityError("Verify failed")

1985

2330

# New buffer for the fingerprint

1986

2331

buf = ctypes.create_string_buffer(20)

1987

2332

buf_len = ctypes.c_size_t()

1988

2333

# Get the fingerprint from the certificate into the buffer

1989

gnutls.library.functions.gnutls_openpgp_crt_get_fingerprint(

1990

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

2334

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

2335

ctypes.byref(buf_len))

1991

2336

# Deinit the certificate

1992

gnutls.library.functions.gnutls_openpgp_crt_deinit(crt)

2337

gnutls.openpgp_crt_deinit(crt)

1993

2338

# Convert the buffer to a Python bytestring

1994

2339

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

1995

2340

# Convert the bytestring to hexadecimal notation

2139

2484

gnutls_priority GnuTLS priority string

2140

2485

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

2141

2486

2142

Assumes a gobject.MainLoop event loop.

2487

Assumes a GLib.MainLoop event loop.

2143

2488

"""

2144

2489

2145

2490

def __init__(self, server_address, RequestHandlerClass,

2170

2515

2171

2516

def add_pipe(self, parent_pipe, proc):

2172

2517

# Call "handle_ipc" for both data and EOF events

2173

gobject.io_add_watch(

2518

GLib.io_add_watch(

2174

2519

parent_pipe.fileno(),

2175

gobject.IO_IN | gobject.IO_HUP,

2520

GLib.IO_IN | GLib.IO_HUP,

2176

2521

functools.partial(self.handle_ipc,

2177

2522

parent_pipe = parent_pipe,

2178

2523

proc = proc))

2182

2527

proc = None,

2183

2528

client_object=None):

2184

2529

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

2185

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

2530

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

2186

2531

# Wait for other process to exit

2187

2532

proc.join()

2188

2533

return False

2195

2540

fpr = request[1]

2196

2541

address = request[2]

2197

2542

2198

for c in self.clients.itervalues():

2543

for c in self.clients.values():

2199

2544

if c.fingerprint == fpr:

2200

2545

client = c

2201

2546

break

2209

2554

parent_pipe.send(False)

2210

2555

return False

2211

2556

2212

gobject.io_add_watch(

2557

GLib.io_add_watch(

2213

2558

parent_pipe.fileno(),

2214

gobject.IO_IN | gobject.IO_HUP,

2559

GLib.IO_IN | GLib.IO_HUP,

2215

2560

functools.partial(self.handle_ipc,

2216

2561

parent_pipe = parent_pipe,

2217

2562

proc = proc,

2599

2944

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

2600

2945

exc_info=e)

2601

2946

2602

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

2947

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

2948

("mandos", "mandos"),

2949

("nobody", "nogroup")):

2603

2950

try:

2604

2951

uid = pwd.getpwnam(name).pw_uid

2605

gid = pwd.getpwnam(name).pw_gid

2952

gid = pwd.getpwnam(group).pw_gid

2606

2953

break

2607

2954

except KeyError:

2608

2955

continue

2612

2959

try:

2613

2960

os.setgid(gid)

2614

2961

os.setuid(uid)

2962

if debug:

2963

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

2964

gid))

2615

2965

except OSError as error:

2966

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

2967

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

2616

2968

if error.errno != errno.EPERM:

2617

2969

raise

2618

2970

2621

2973

2622

2974

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

2623

2975

# - GnuTLS manual

2624

gnutls.library.functions.gnutls_global_set_log_level(11)

2976

gnutls.global_set_log_level(11)

2625

2977

2626

@gnutls.library.types.gnutls_log_func

2978

@gnutls.log_func

2627

2979

def debug_gnutls(level, string):

2628

2980

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

2629

2981

2630

gnutls.library.functions.gnutls_global_set_log_function(

2631

debug_gnutls)

2982

gnutls.global_set_log_function(debug_gnutls)

2632

2983

2633

2984

# Redirect stdin so all checkers get /dev/null

2634

2985

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

2641

2992

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

2642

2993

daemon()

2643

2994

2644

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

2645

# need to inform gobject that threads will be used.

2646

gobject.threads_init()

2995

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

2996

# to inform GLib that threads will be used.

2997

GLib.threads_init()

2647

2998

2648

2999

global main_loop

2649

3000

# From the Avahi example code

2650

3001

DBusGMainLoop(set_as_default=True)

2651

main_loop = gobject.MainLoop()

3002

main_loop = GLib.MainLoop()

2652

3003

bus = dbus.SystemBus()

2653

3004

# End of Avahi example code

2654

3005

if use_dbus:

2698

3049

if server_settings["restore"]:

2699

3050

try:

2700

3051

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

2701

clients_data, old_client_settings = pickle.load(

2702

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"))

2703

3097

os.remove(stored_state_path)

2704

3098

except IOError as e:

2705

3099

if e.errno == errno.ENOENT:

2806

3200

del pidfile

2807

3201

del pidfilename

2808

3202

2809

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

2810

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

3203

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

3204

GLib.unix_signal_add(GLib.PRIORITY_HIGH, termsig,

3205

lambda: main_loop.quit() and False)

2811

3206

2812

3207

if use_dbus:

2813

3208

2814

3209

@alternate_dbus_interfaces(

2815

3210

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

2816

class MandosDBusService(DBusObjectWithAnnotations):

3211

class MandosDBusService(DBusObjectWithObjectManager):

2817

3212

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

2818

3213

2819

3214

def __init__(self):

2831

3226

"D-Bus signal"

2832

3227

pass

2833

3228

3229

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

3230

"true"})

2834

3231

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

2835

3232

def ClientRemoved(self, objpath, name):

2836

3233

"D-Bus signal"

2837

3234

pass

2838

3235

3236

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

3237

"true"})

2839

3238

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

2840

3239

def GetAllClients(self):

2841

3240

"D-Bus method"

2842

3241

return dbus.Array(c.dbus_object_path for c in

2843

tcp_server.clients.itervalues())

3242

tcp_server.clients.values())

2844

3243

3244

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

3245

"true"})

2845

3246

@dbus.service.method(_interface,

2846

3247

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

2847

3248

def GetAllClientsWithProperties(self):

2848

3249

"D-Bus method"

2849

3250

return dbus.Dictionary(

2850

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

2851

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

3251

{ c.dbus_object_path: c.GetAll(

3252

"se.recompile.Mandos.Client")

3253

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

2852

3254

signature="oa{sv}")

2853

3255

2854

3256

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

2855

3257

def RemoveClient(self, object_path):

2856

3258

"D-Bus method"

2857

for c in tcp_server.clients.itervalues():

3259

for c in tcp_server.clients.values():

2858

3260

if c.dbus_object_path == object_path:

2859

3261

del tcp_server.clients[c.name]

2860

3262

c.remove_from_connection()

2861

# Don't signal anything except ClientRemoved

3263

# Don't signal the disabling

2862

3264

c.disable(quiet=True)

2863

# Emit D-Bus signal

2864

self.ClientRemoved(object_path, c.name)

3265

# Emit D-Bus signal for removal

3266

self.client_removed_signal(c)

2865

3267

return

2866

3268

raise KeyError(object_path)

2867

3269

2868

3270

del _interface

3271

3272

@dbus.service.method(dbus.OBJECT_MANAGER_IFACE,

3273

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

3274

def GetManagedObjects(self):

3275

"""D-Bus method"""

3276

return dbus.Dictionary(

3277

{ client.dbus_object_path:

3278

dbus.Dictionary(

3279

{ interface: client.GetAll(interface)

3280

for interface in

3281

client._get_all_interface_names()})

3282

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

3283

3284

def client_added_signal(self, client):

3285

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

3286

if use_dbus:

3287

# New standard signal

3288

self.InterfacesAdded(

3289

client.dbus_object_path,

3290

dbus.Dictionary(

3291

{ interface: client.GetAll(interface)

3292

for interface in

3293

client._get_all_interface_names()}))

3294

# Old signal

3295

self.ClientAdded(client.dbus_object_path)

3296

3297

def client_removed_signal(self, client):

3298

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

3299

if use_dbus:

3300

# New standard signal

3301

self.InterfacesRemoved(

3302

client.dbus_object_path,

3303

client._get_all_interface_names())

3304

# Old signal

3305

self.ClientRemoved(client.dbus_object_path,

3306

client.name)

2869

3307

2870

3308

mandos_dbus_service = MandosDBusService()

2871

3309

2884

3322

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

2885

3323

clients = {}

2886

3324

with PGPEngine() as pgp:

2887

for client in tcp_server.clients.itervalues():

3325

for client in tcp_server.clients.values():

2888

3326

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

2889

3327

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

2890

3328

key)

2914

3352

prefix='clients-',

2915

3353

dir=os.path.dirname(stored_state_path),

2916

3354

delete=False) as stored_state:

2917

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

3355

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

3356

protocol = 2)

2918

3357

tempname = stored_state.name

2919

3358

os.rename(tempname, stored_state_path)

2920

3359

except (IOError, OSError) as e:

2936

3375

name, client = tcp_server.clients.popitem()

2937

3376

if use_dbus:

2938

3377

client.remove_from_connection()

2939

# Don't signal anything except ClientRemoved

3378

# Don't signal the disabling

2940

3379

client.disable(quiet=True)

3380

# Emit D-Bus signal for removal

2941

3381

if use_dbus:

2942

# Emit D-Bus signal

2943

mandos_dbus_service.ClientRemoved(

2944

client.dbus_object_path, client.name)

3382

mandos_dbus_service.client_removed_signal(client)

2945

3383

client_settings.clear()

2946

3384

2947

3385

atexit.register(cleanup)

2948

3386

2949

for client in tcp_server.clients.itervalues():

3387

for client in tcp_server.clients.values():

2950

3388

if use_dbus:

2951

# Emit D-Bus signal

2952

mandos_dbus_service.ClientAdded(client.dbus_object_path)

3389

# Emit D-Bus signal for adding

3390

mandos_dbus_service.client_added_signal(client)

2953

3391

# Need to initiate checking of clients

2954

3392

if client.enabled:

2955

3393

client.init_checker()

2981

3419

sys.exit(1)

2982

3420

# End of Avahi example code

2983

3421

2984

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

2985

lambda *args, **kwargs:

2986

(tcp_server.handle_request

2987

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

3422

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

3423

lambda *args, **kwargs:

3424

(tcp_server.handle_request

3425

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

2988

3426

2989

3427

logger.debug("Starting main loop")

2990

3428

main_loop.run()