/mandos/trunk : revision 793

1

#!/usr/bin/python

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#!/usr/bin/python2.7

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

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#

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

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

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#

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# Everything else is

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#

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

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

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from __future__ import (division, absolute_import, print_function,

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unicode_literals)

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try:

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from future_builtins import *

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except ImportError:

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pass

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from future_builtins import *

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try:

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import SocketServer as socketserver

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import argparse

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import datetime

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import errno

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import gnutls.crypto

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import gnutls.connection

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import gnutls.errors

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import gnutls.library.functions

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import gnutls.library.constants

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import gnutls.library.types

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try:

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import ConfigParser as configparser

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except ImportError:

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import dbus

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import dbus.service

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from gi.repository import GLib

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try:

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import gobject

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except ImportError:

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from gi.repository import GObject as gobject

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import avahi

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from dbus.mainloop.glib import DBusGMainLoop

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import ctypes

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import ctypes.util

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import xml.dom.minidom

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import inspect

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# Try to find the value of SO_BINDTODEVICE:

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try:

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# This is where SO_BINDTODEVICE is in Python 3.3 (or 3.4?) and

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# newer, and it is also the most natural place for it:

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SO_BINDTODEVICE = socket.SO_BINDTODEVICE

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except AttributeError:

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try:

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# This is where SO_BINDTODEVICE was up to and including Python

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# 2.6, and also 3.2:

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from IN import SO_BINDTODEVICE

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except ImportError:

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# In Python 2.7 it seems to have been removed entirely.

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# Try running the C preprocessor:

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try:

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cc = subprocess.Popen(["cc", "--language=c", "-E",

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"/dev/stdin"],

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stdin=subprocess.PIPE,

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stdout=subprocess.PIPE)

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stdout = cc.communicate(

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"#include <sys/socket.h>\nSO_BINDTODEVICE\n")[0]

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SO_BINDTODEVICE = int(stdout.splitlines()[-1])

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except (OSError, ValueError, IndexError):

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# No value found

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SO_BINDTODEVICE = None

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SO_BINDTODEVICE = None

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if sys.version_info.major == 2:

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str = unicode

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version = "1.7.10"

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version = "1.7.1"

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stored_state_file = "clients.pickle"

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logger = logging.getLogger()

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return interface_index

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def copy_function(func):

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

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if sys.version_info.major == 2:

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return types.FunctionType(func.func_code,

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func.func_globals,

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func.func_name,

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func.func_defaults,

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func.func_closure)

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else:

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return types.FunctionType(func.__code__,

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func.__globals__,

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func.__name__,

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func.__defaults__,

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func.__closure__)

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

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"""init logger and add loglevel"""

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def __init__(self):

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

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self.gpg = "gpg"

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try:

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

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for line in output.splitlines():

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

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if name == "gpg":

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self.gpg = path

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break

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except OSError as e:

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if e.errno != errno.ENOENT:

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raise

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self.gnupgargs = ['--batch',

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'--homedir', self.tempdir,

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'--home', self.tempdir,

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'--force-mdc',

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'--quiet']

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# Only GPG version 1 has the --no-use-agent option.

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if self.gpg == "gpg" or self.gpg.endswith("/gpg"):

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self.gnupgargs.append("--no-use-agent")

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'--quiet',

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'--no-use-agent']

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def __enter__(self):

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return self

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dir=self.tempdir) as passfile:

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passfile.write(passphrase)

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passfile.flush()

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

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

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'--passphrase-file',

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passfile.name]

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+ self.gnupgargs,

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dir = self.tempdir) as passfile:

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passfile.write(passphrase)

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passfile.flush()

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

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

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'--passphrase-file',

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passfile.name]

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+ self.gnupgargs,

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raise PGPError(err)

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return decrypted_plaintext

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# Pretend that we have an Avahi module

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class Avahi(object):

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

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

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

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

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PROTO_INET = 0 # avahi-common/address.h

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PROTO_INET6 = 1 # avahi-common/address.h

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DBUS_NAME = "org.freedesktop.Avahi"

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DBUS_INTERFACE_ENTRY_GROUP = DBUS_NAME + ".EntryGroup"

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DBUS_INTERFACE_SERVER = DBUS_NAME + ".Server"

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DBUS_PATH_SERVER = "/"

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def string_array_to_txt_array(self, t):

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

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

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ENTRY_GROUP_ESTABLISHED = 2 # avahi-common/defs.h

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ENTRY_GROUP_COLLISION = 3 # avahi-common/defs.h

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ENTRY_GROUP_FAILURE = 4 # avahi-common/defs.h

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SERVER_INVALID = 0 # avahi-common/defs.h

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SERVER_REGISTERING = 1 # avahi-common/defs.h

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SERVER_RUNNING = 2 # avahi-common/defs.h

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SERVER_COLLISION = 3 # avahi-common/defs.h

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SERVER_FAILURE = 4 # avahi-common/defs.h

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avahi = Avahi()

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class AvahiError(Exception):

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

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.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

511

# 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

532

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):

536

_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)

548

credentials_type_t = ctypes.c_int

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transport_ptr_t = ctypes.c_void_p

550

close_request_t = ctypes.c_int

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# Exceptions

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class Error(Exception):

554

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

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# exception might be raised from within GnuTLS.__init__,

556

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

557

# global variable has happened.

558

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

559

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

560

# code is passed, convert it to a string with

561

# gnutls.strerror()

562

self.code = code

563

if message is None and code is not None:

564

message = GnuTLS.strerror(code)

565

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

566

message, *args)

567

568

class CertificateSecurityError(Error):

569

pass

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571

# Classes

572

class Credentials(object):

573

def __init__(self):

574

self._c_object = gnutls.certificate_credentials_t()

575

gnutls.certificate_allocate_credentials(

576

ctypes.byref(self._c_object))

577

self.type = gnutls.CRD_CERTIFICATE

578

579

def __del__(self):

580

gnutls.certificate_free_credentials(self._c_object)

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582

class ClientSession(object):

583

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

584

self._c_object = gnutls.session_t()

585

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

586

gnutls.set_default_priority(self._c_object)

587

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

588

gnutls.handshake_set_private_extensions(self._c_object,

589

True)

590

self.socket = socket

591

if credentials is None:

592

credentials = gnutls.Credentials()

593

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

594

ctypes.cast(credentials._c_object,

595

ctypes.c_void_p))

596

self.credentials = credentials

597

598

def __del__(self):

599

gnutls.deinit(self._c_object)

600

601

def handshake(self):

602

return gnutls.handshake(self._c_object)

603

604

def send(self, data):

605

data = bytes(data)

606

data_len = len(data)

607

while data_len > 0:

608

data_len -= gnutls.record_send(self._c_object,

609

data[-data_len:],

610

data_len)

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612

def bye(self):

613

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

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615

# Error handling functions

616

def _error_code(result):

617

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

618

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

619

if result >= 0:

620

return result

621

if result == gnutls.E_NO_CERTIFICATE_FOUND:

622

raise gnutls.CertificateSecurityError(code = result)

623

raise gnutls.Error(code = result)

624

625

def _retry_on_error(result, func, arguments):

626

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

627

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

628

while result < 0:

629

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

630

return _error_code(result)

631

result = func(*arguments)

632

return result

633

634

# Unless otherwise indicated, the function declarations below are

635

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

636

637

# Functions

638

priority_set_direct = _library.gnutls_priority_set_direct

639

priority_set_direct.argtypes = [session_t, ctypes.c_char_p,

640

ctypes.POINTER(ctypes.c_char_p)]

641

priority_set_direct.restype = _error_code

642

643

init = _library.gnutls_init

644

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

645

init.restype = _error_code

646

647

set_default_priority = _library.gnutls_set_default_priority

648

set_default_priority.argtypes = [session_t]

649

set_default_priority.restype = _error_code

650

651

record_send = _library.gnutls_record_send

652

record_send.argtypes = [session_t, ctypes.c_void_p,

653

ctypes.c_size_t]

654

record_send.restype = ctypes.c_ssize_t

655

record_send.errcheck = _retry_on_error

656

657

certificate_allocate_credentials = (

658

_library.gnutls_certificate_allocate_credentials)

659

certificate_allocate_credentials.argtypes = [

660

ctypes.POINTER(certificate_credentials_t)]

661

certificate_allocate_credentials.restype = _error_code

662

663

certificate_free_credentials = (

664

_library.gnutls_certificate_free_credentials)

665

certificate_free_credentials.argtypes = [certificate_credentials_t]

666

certificate_free_credentials.restype = None

667

668

handshake_set_private_extensions = (

669

_library.gnutls_handshake_set_private_extensions)

670

handshake_set_private_extensions.argtypes = [session_t,

671

ctypes.c_int]

672

handshake_set_private_extensions.restype = None

673

674

credentials_set = _library.gnutls_credentials_set

675

credentials_set.argtypes = [session_t, credentials_type_t,

676

ctypes.c_void_p]

677

credentials_set.restype = _error_code

678

679

strerror = _library.gnutls_strerror

680

strerror.argtypes = [ctypes.c_int]

681

strerror.restype = ctypes.c_char_p

682

683

certificate_type_get = _library.gnutls_certificate_type_get

684

certificate_type_get.argtypes = [session_t]

685

certificate_type_get.restype = _error_code

686

687

certificate_get_peers = _library.gnutls_certificate_get_peers

688

certificate_get_peers.argtypes = [session_t,

689

ctypes.POINTER(ctypes.c_uint)]

690

certificate_get_peers.restype = ctypes.POINTER(datum_t)

691

692

global_set_log_level = _library.gnutls_global_set_log_level

693

global_set_log_level.argtypes = [ctypes.c_int]

694

global_set_log_level.restype = None

695

696

global_set_log_function = _library.gnutls_global_set_log_function

697

global_set_log_function.argtypes = [log_func]

698

global_set_log_function.restype = None

699

700

deinit = _library.gnutls_deinit

701

deinit.argtypes = [session_t]

702

deinit.restype = None

703

704

handshake = _library.gnutls_handshake

705

handshake.argtypes = [session_t]

706

handshake.restype = _error_code

707

handshake.errcheck = _retry_on_error

708

709

transport_set_ptr = _library.gnutls_transport_set_ptr

710

transport_set_ptr.argtypes = [session_t, transport_ptr_t]

711

transport_set_ptr.restype = None

712

713

bye = _library.gnutls_bye

714

bye.argtypes = [session_t, close_request_t]

715

bye.restype = _error_code

716

bye.errcheck = _retry_on_error

717

718

check_version = _library.gnutls_check_version

719

check_version.argtypes = [ctypes.c_char_p]

720

check_version.restype = ctypes.c_char_p

721

722

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

723

724

openpgp_crt_init = _library.gnutls_openpgp_crt_init

725

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

726

openpgp_crt_init.restype = _error_code

727

728

openpgp_crt_import = _library.gnutls_openpgp_crt_import

729

openpgp_crt_import.argtypes = [openpgp_crt_t,

730

ctypes.POINTER(datum_t),

731

openpgp_crt_fmt_t]

732

openpgp_crt_import.restype = _error_code

733

734

openpgp_crt_verify_self = _library.gnutls_openpgp_crt_verify_self

735

openpgp_crt_verify_self.argtypes = [openpgp_crt_t, ctypes.c_uint,

736

ctypes.POINTER(ctypes.c_uint)]

737

openpgp_crt_verify_self.restype = _error_code

738

739

openpgp_crt_deinit = _library.gnutls_openpgp_crt_deinit

740

openpgp_crt_deinit.argtypes = [openpgp_crt_t]

741

openpgp_crt_deinit.restype = None

742

743

openpgp_crt_get_fingerprint = (

744

_library.gnutls_openpgp_crt_get_fingerprint)

745

openpgp_crt_get_fingerprint.argtypes = [openpgp_crt_t,

746

ctypes.c_void_p,

747

ctypes.POINTER(

748

ctypes.c_size_t)]

749

openpgp_crt_get_fingerprint.restype = _error_code

750

751

# Remove non-public functions

752

del _error_code, _retry_on_error

753

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

754

gnutls = GnuTLS()

755

756

438

def call_pipe(connection, # : multiprocessing.Connection

757

439

func, *args, **kwargs):

758

440

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

773

455

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

774

456

to see if the client lives.

775

457

'None' if no process is running.

776

checker_callback_tag: a GLib event source tag, or None

458

checker_callback_tag: a gobject event source tag, or None

777

459

checker_command: string; External command which is run to check

778

460

if client lives. %() expansions are done at

779

461

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

780

462

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

781

checker_initiator_tag: a GLib event source tag, or None

463

checker_initiator_tag: a gobject event source tag, or None

782

464

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

783

465

client_structure: Object describing what attributes a client has

784

466

and is used for storing the client at exit

785

467

current_checker_command: string; current running checker_command

786

disable_initiator_tag: a GLib event source tag, or None

468

disable_initiator_tag: a gobject event source tag, or None

787

469

enabled: bool()

788

470

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

789

471

uniquely identify the client

852

534

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

853

535

.replace(" ", ""))

854

536

if "secret" in section:

855

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

856

.encode("utf-8"),

857

"base64")

537

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

858

538

elif "secfile" in section:

859

539

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

860

540

(section["secfile"])),

913

593

self.changedstate = multiprocessing_manager.Condition(

914

594

multiprocessing_manager.Lock())

915

595

self.client_structure = [attr

916

for attr in self.__dict__.keys()

596

for attr in self.__dict__.iterkeys()

917

597

if not attr.startswith("_")]

918

598

self.client_structure.append("client_structure")

919

599

945

625

if not quiet:

946

626

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

947

627

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

948

GLib.source_remove(self.disable_initiator_tag)

628

gobject.source_remove(self.disable_initiator_tag)

949

629

self.disable_initiator_tag = None

950

630

self.expires = None

951

631

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

952

GLib.source_remove(self.checker_initiator_tag)

632

gobject.source_remove(self.checker_initiator_tag)

953

633

self.checker_initiator_tag = None

954

634

self.stop_checker()

955

635

self.enabled = False

956

636

if not quiet:

957

637

self.send_changedstate()

958

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

638

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

959

639

return False

960

640

961

641

def __del__(self):

965

645

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

966

646

# and every interval from then on.

967

647

if self.checker_initiator_tag is not None:

968

GLib.source_remove(self.checker_initiator_tag)

969

self.checker_initiator_tag = GLib.timeout_add(

648

gobject.source_remove(self.checker_initiator_tag)

649

self.checker_initiator_tag = gobject.timeout_add(

970

650

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

971

651

self.start_checker)

972

652

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

973

653

if self.disable_initiator_tag is not None:

974

GLib.source_remove(self.disable_initiator_tag)

975

self.disable_initiator_tag = GLib.timeout_add(

654

gobject.source_remove(self.disable_initiator_tag)

655

self.disable_initiator_tag = gobject.timeout_add(

976

656

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

977

657

# Also start a new checker *right now*.

978

658

self.start_checker()

1014

694

if timeout is None:

1015

695

timeout = self.timeout

1016

696

if self.disable_initiator_tag is not None:

1017

GLib.source_remove(self.disable_initiator_tag)

697

gobject.source_remove(self.disable_initiator_tag)

1018

698

self.disable_initiator_tag = None

1019

699

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

1020

self.disable_initiator_tag = GLib.timeout_add(

700

self.disable_initiator_tag = gobject.timeout_add(

1021

701

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

1022

702

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

1023

703

1078

758

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

1079

759

kwargs = popen_args)

1080

760

self.checker.start()

1081

self.checker_callback_tag = GLib.io_add_watch(

1082

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

761

self.checker_callback_tag = gobject.io_add_watch(

762

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

1083

763

self.checker_callback, pipe[0], command)

1084

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

764

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

1085

765

return True

1086

766

1087

767

def stop_checker(self):

1088

768

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

1089

769

if self.checker_callback_tag:

1090

GLib.source_remove(self.checker_callback_tag)

770

gobject.source_remove(self.checker_callback_tag)

1091

771

self.checker_callback_tag = None

1092

772

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

1093

773

return

1567

1247

interface_names.add(alt_interface)

1568

1248

# Is this a D-Bus signal?

1569

1249

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

1570

# Extract the original non-method undecorated

1571

# function by black magic

1572

1250

if sys.version_info.major == 2:

1251

# Extract the original non-method undecorated

1252

# function by black magic

1573

1253

nonmethod_func = (dict(

1574

1254

zip(attribute.func_code.co_freevars,

1575

1255

attribute.__closure__))

1576

1256

["func"].cell_contents)

1577

1257

else:

1578

nonmethod_func = (dict(

1579

zip(attribute.__code__.co_freevars,

1580

attribute.__closure__))

1581

["func"].cell_contents)

1258

nonmethod_func = attribute

1582

1259

# Create a new, but exactly alike, function

1583

1260

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

1584

1261

# with the alternate D-Bus interface name

1585

new_function = copy_function(nonmethod_func)

1262

if sys.version_info.major == 2:

1263

new_function = types.FunctionType(

1264

nonmethod_func.func_code,

1265

nonmethod_func.func_globals,

1266

nonmethod_func.func_name,

1267

nonmethod_func.func_defaults,

1268

nonmethod_func.func_closure)

1269

else:

1270

new_function = types.FunctionType(

1271

nonmethod_func.__code__,

1272

nonmethod_func.__globals__,

1273

nonmethod_func.__name__,

1274

nonmethod_func.__defaults__,

1275

nonmethod_func.__closure__)

1586

1276

new_function = (dbus.service.signal(

1587

1277

alt_interface,

1588

1278

attribute._dbus_signature)(new_function))

1627

1317

alt_interface,

1628

1318

attribute._dbus_in_signature,

1629

1319

attribute._dbus_out_signature)

1630

(copy_function(attribute)))

1320

(types.FunctionType(attribute.func_code,

1321

attribute.func_globals,

1322

attribute.func_name,

1323

attribute.func_defaults,

1324

attribute.func_closure)))

1631

1325

# Copy annotations, if any

1632

1326

try:

1633

1327

attr[attrname]._dbus_annotations = dict(

1645

1339

attribute._dbus_access,

1646

1340

attribute._dbus_get_args_options

1647

1341

["byte_arrays"])

1648

(copy_function(attribute)))

1342

(types.FunctionType(

1343

attribute.func_code,

1344

attribute.func_globals,

1345

attribute.func_name,

1346

attribute.func_defaults,

1347

attribute.func_closure)))

1649

1348

# Copy annotations, if any

1650

1349

try:

1651

1350

attr[attrname]._dbus_annotations = dict(

1660

1359

# to the class.

1661

1360

attr[attrname] = (

1662

1361

dbus_interface_annotations(alt_interface)

1663

(copy_function(attribute)))

1362

(types.FunctionType(attribute.func_code,

1363

attribute.func_globals,

1364

attribute.func_name,

1365

attribute.func_defaults,

1366

attribute.func_closure)))

1664

1367

if deprecate:

1665

1368

# Deprecate all alternate interfaces

1666

1369

iname="_AlternateDBusNames_interface_annotation{}"

1679

1382

if interface_names:

1680

1383

# Replace the class with a new subclass of it with

1681

1384

# methods, signals, etc. as created above.

1682

if sys.version_info.major == 2:

1683

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

1684

(cls, ), attr)

1685

else:

1686

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

1687

(cls, ), attr)

1385

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

1386

(cls, ), attr)

1688

1387

return cls

1689

1388

1690

1389

return wrapper

1848

1547

1849

1548

def approve(self, value=True):

1850

1549

self.approved = value

1851

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

1852

* 1000), self._reset_approved)

1550

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

1551

* 1000), self._reset_approved)

1853

1552

self.send_changedstate()

1854

1553

1855

1554

## D-Bus methods, signals & properties

2065

1764

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

2066

1765

is None):

2067

1766

return

2068

GLib.source_remove(self.disable_initiator_tag)

2069

self.disable_initiator_tag = GLib.timeout_add(

1767

gobject.source_remove(self.disable_initiator_tag)

1768

self.disable_initiator_tag = gobject.timeout_add(

2070

1769

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

2071

1770

self.disable)

2072

1771

2092

1791

return

2093

1792

if self.enabled:

2094

1793

# Reschedule checker run

2095

GLib.source_remove(self.checker_initiator_tag)

2096

self.checker_initiator_tag = GLib.timeout_add(

1794

gobject.source_remove(self.checker_initiator_tag)

1795

self.checker_initiator_tag = gobject.timeout_add(

2097

1796

value, self.start_checker)

2098

1797

self.start_checker() # Start one now, too

2099

1798

2181

1880

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

2182

1881

self.server.child_pipe.fileno())

2183

1882

2184

session = gnutls.ClientSession(self.request)

1883

session = gnutls.connection.ClientSession(

1884

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

1885

1886

# Note: gnutls.connection.X509Credentials is really a

1887

# generic GnuTLS certificate credentials object so long as

1888

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

1889

# here despite using OpenPGP certificates.

2185

1890

2186

1891

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

2187

1892

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

2191

1896

priority = self.server.gnutls_priority

2192

1897

if priority is None:

2193

1898

priority = "NORMAL"

2194

gnutls.priority_set_direct(session._c_object,

2195

priority.encode("utf-8"),

2196

None)

1899

gnutls.library.functions.gnutls_priority_set_direct(

1900

session._c_object, priority, None)

2197

1901

2198

1902

# Start communication using the Mandos protocol

2199

1903

# Get protocol number

2209

1913

# Start GnuTLS connection

2210

1914

try:

2211

1915

session.handshake()

2212

except gnutls.Error as error:

1916

except gnutls.errors.GNUTLSError as error:

2213

1917

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

2214

1918

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

2215

1919

# established. Just abandon the request.

2221

1925

try:

2222

1926

fpr = self.fingerprint(

2223

1927

self.peer_certificate(session))

2224

except (TypeError, gnutls.Error) as error:

1928

except (TypeError,

1929

gnutls.errors.GNUTLSError) as error:

2225

1930

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

2226

1931

return

2227

1932

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

2285

1990

else:

2286

1991

delay -= time2 - time

2287

1992

2288

try:

2289

session.send(client.secret)

2290

except gnutls.Error as error:

2291

logger.warning("gnutls send failed",

2292

exc_info = error)

2293

return

1993

sent_size = 0

1994

while sent_size < len(client.secret):

1995

try:

1996

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

1997

except gnutls.errors.GNUTLSError as error:

1998

logger.warning("gnutls send failed",

1999

exc_info=error)

2000

return

2001

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

2002

len(client.secret) - (sent_size

2003

+ sent))

2004

sent_size += sent

2294

2005

2295

2006

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

2296

2007

# bump the timeout using extended_timeout

2304

2015

client.approvals_pending -= 1

2305

2016

try:

2306

2017

session.bye()

2307

except gnutls.Error as error:

2018

except gnutls.errors.GNUTLSError as error:

2308

2019

logger.warning("GnuTLS bye failed",

2309

2020

exc_info=error)

2310

2021

2312

2023

def peer_certificate(session):

2313

2024

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

2314

2025

# If not an OpenPGP certificate...

2315

if (gnutls.certificate_type_get(session._c_object)

2316

!= gnutls.CRT_OPENPGP):

2317

# ...return invalid data

2318

return b""

2026

if (gnutls.library.functions.gnutls_certificate_type_get(

2027

session._c_object)

2028

!= gnutls.library.constants.GNUTLS_CRT_OPENPGP):

2029

# ...do the normal thing

2030

return session.peer_certificate

2319

2031

list_size = ctypes.c_uint(1)

2320

cert_list = (gnutls.certificate_get_peers

2032

cert_list = (gnutls.library.functions

2033

.gnutls_certificate_get_peers

2321

2034

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

2322

2035

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

2323

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

2036

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

2037

" certificate")

2324

2038

if list_size.value == 0:

2325

2039

return None

2326

2040

cert = cert_list[0]

2330

2044

def fingerprint(openpgp):

2331

2045

"Convert an OpenPGP bytestring to a hexdigit fingerprint"

2332

2046

# New GnuTLS "datum" with the OpenPGP public key

2333

datum = gnutls.datum_t(

2047

datum = gnutls.library.types.gnutls_datum_t(

2334

2048

ctypes.cast(ctypes.c_char_p(openpgp),

2335

2049

ctypes.POINTER(ctypes.c_ubyte)),

2336

2050

ctypes.c_uint(len(openpgp)))

2337

2051

# New empty GnuTLS certificate

2338

crt = gnutls.openpgp_crt_t()

2339

gnutls.openpgp_crt_init(ctypes.byref(crt))

2052

crt = gnutls.library.types.gnutls_openpgp_crt_t()

2053

gnutls.library.functions.gnutls_openpgp_crt_init(

2054

ctypes.byref(crt))

2340

2055

# Import the OpenPGP public key into the certificate

2341

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

2342

gnutls.OPENPGP_FMT_RAW)

2056

gnutls.library.functions.gnutls_openpgp_crt_import(

2057

crt, ctypes.byref(datum),

2058

gnutls.library.constants.GNUTLS_OPENPGP_FMT_RAW)

2343

2059

# Verify the self signature in the key

2344

2060

crtverify = ctypes.c_uint()

2345

gnutls.openpgp_crt_verify_self(crt, 0,

2346

ctypes.byref(crtverify))

2061

gnutls.library.functions.gnutls_openpgp_crt_verify_self(

2062

crt, 0, ctypes.byref(crtverify))

2347

2063

if crtverify.value != 0:

2348

gnutls.openpgp_crt_deinit(crt)

2349

raise gnutls.CertificateSecurityError("Verify failed")

2064

gnutls.library.functions.gnutls_openpgp_crt_deinit(crt)

2065

raise gnutls.errors.CertificateSecurityError(

2066

"Verify failed")

2350

2067

# New buffer for the fingerprint

2351

2068

buf = ctypes.create_string_buffer(20)

2352

2069

buf_len = ctypes.c_size_t()

2353

2070

# Get the fingerprint from the certificate into the buffer

2354

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

2355

ctypes.byref(buf_len))

2071

gnutls.library.functions.gnutls_openpgp_crt_get_fingerprint(

2072

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

2356

2073

# Deinit the certificate

2357

gnutls.openpgp_crt_deinit(crt)

2074

gnutls.library.functions.gnutls_openpgp_crt_deinit(crt)

2358

2075

# Convert the buffer to a Python bytestring

2359

2076

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

2360

2077

# Convert the bytestring to hexadecimal notation

2453

2170

"""This overrides the normal server_bind() function

2454

2171

to bind to an interface if one was specified, and also NOT to

2455

2172

bind to an address or port if they were not specified."""

2456

global SO_BINDTODEVICE

2457

2173

if self.interface is not None:

2458

2174

if SO_BINDTODEVICE is None:

2459

# Fall back to a hard-coded value which seems to be

2460

# common enough.

2461

logger.warning("SO_BINDTODEVICE not found, trying 25")

2462

SO_BINDTODEVICE = 25

2463

try:

2464

self.socket.setsockopt(

2465

socket.SOL_SOCKET, SO_BINDTODEVICE,

2466

(self.interface + "\0").encode("utf-8"))

2467

except socket.error as error:

2468

if error.errno == errno.EPERM:

2469

logger.error("No permission to bind to"

2470

" interface %s", self.interface)

2471

elif error.errno == errno.ENOPROTOOPT:

2472

logger.error("SO_BINDTODEVICE not available;"

2473

" cannot bind to interface %s",

2474

self.interface)

2475

elif error.errno == errno.ENODEV:

2476

logger.error("Interface %s does not exist,"

2477

" cannot bind", self.interface)

2478

else:

2479

raise

2175

logger.error("SO_BINDTODEVICE does not exist;"

2176

" cannot bind to interface %s",

2177

self.interface)

2178

else:

2179

try:

2180

self.socket.setsockopt(

2181

socket.SOL_SOCKET, SO_BINDTODEVICE,

2182

(self.interface + "\0").encode("utf-8"))

2183

except socket.error as error:

2184

if error.errno == errno.EPERM:

2185

logger.error("No permission to bind to"

2186

" interface %s", self.interface)

2187

elif error.errno == errno.ENOPROTOOPT:

2188

logger.error("SO_BINDTODEVICE not available;"

2189

" cannot bind to interface %s",

2190

self.interface)

2191

elif error.errno == errno.ENODEV:

2192

logger.error("Interface %s does not exist,"

2193

" cannot bind", self.interface)

2194

else:

2195

raise

2480

2196

# Only bind(2) the socket if we really need to.

2481

2197

if self.server_address[0] or self.server_address[1]:

2482

2198

if not self.server_address[0]:

2505

2221

gnutls_priority GnuTLS priority string

2506

2222

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

2507

2223

2508

Assumes a GLib.MainLoop event loop.

2224

Assumes a gobject.MainLoop event loop.

2509

2225

"""

2510

2226

2511

2227

def __init__(self, server_address, RequestHandlerClass,

2536

2252

2537

2253

def add_pipe(self, parent_pipe, proc):

2538

2254

# Call "handle_ipc" for both data and EOF events

2539

GLib.io_add_watch(

2255

gobject.io_add_watch(

2540

2256

parent_pipe.fileno(),

2541

GLib.IO_IN | GLib.IO_HUP,

2257

gobject.IO_IN | gobject.IO_HUP,

2542

2258

functools.partial(self.handle_ipc,

2543

2259

parent_pipe = parent_pipe,

2544

2260

proc = proc))

2548

2264

proc = None,

2549

2265

client_object=None):

2550

2266

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

2551

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

2267

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

2552

2268

# Wait for other process to exit

2553

2269

proc.join()

2554

2270

return False

2561

2277

fpr = request[1]

2562

2278

address = request[2]

2563

2279

2564

for c in self.clients.values():

2280

for c in self.clients.itervalues():

2565

2281

if c.fingerprint == fpr:

2566

2282

client = c

2567

2283

break

2575

2291

parent_pipe.send(False)

2576

2292

return False

2577

2293

2578

GLib.io_add_watch(

2294

gobject.io_add_watch(

2579

2295

parent_pipe.fileno(),

2580

GLib.IO_IN | GLib.IO_HUP,

2296

gobject.IO_IN | gobject.IO_HUP,

2581

2297

functools.partial(self.handle_ipc,

2582

2298

parent_pipe = parent_pipe,

2583

2299

proc = proc,

2965

2681

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

2966

2682

exc_info=e)

2967

2683

2968

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

2969

("mandos", "mandos"),

2970

("nobody", "nogroup")):

2684

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

2971

2685

try:

2972

2686

uid = pwd.getpwnam(name).pw_uid

2973

gid = pwd.getpwnam(group).pw_gid

2687

gid = pwd.getpwnam(name).pw_gid

2974

2688

break

2975

2689

except KeyError:

2976

2690

continue

2980

2694

try:

2981

2695

os.setgid(gid)

2982

2696

os.setuid(uid)

2983

if debug:

2984

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

2985

gid))

2986

2697

except OSError as error:

2987

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

2988

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

2989

2698

if error.errno != errno.EPERM:

2990

2699

raise

2991

2700

2994

2703

2995

2704

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

2996

2705

# - GnuTLS manual

2997

gnutls.global_set_log_level(11)

2706

gnutls.library.functions.gnutls_global_set_log_level(11)

2998

2707

2999

@gnutls.log_func

2708

@gnutls.library.types.gnutls_log_func

3000

2709

def debug_gnutls(level, string):

3001

2710

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

3002

2711

3003

gnutls.global_set_log_function(debug_gnutls)

2712

gnutls.library.functions.gnutls_global_set_log_function(

2713

debug_gnutls)

3004

2714

3005

2715

# Redirect stdin so all checkers get /dev/null

3006

2716

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

3013

2723

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

3014

2724

daemon()

3015

2725

3016

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

3017

# to inform GLib that threads will be used.

3018

GLib.threads_init()

2726

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

2727

# need to inform gobject that threads will be used.

2728

gobject.threads_init()

3019

2729

3020

2730

global main_loop

3021

2731

# From the Avahi example code

3022

2732

DBusGMainLoop(set_as_default=True)

3023

main_loop = GLib.MainLoop()

2733

main_loop = gobject.MainLoop()

3024

2734

bus = dbus.SystemBus()

3025

2735

# End of Avahi example code

3026

2736

if use_dbus:

3070

2780

if server_settings["restore"]:

3071

2781

try:

3072

2782

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

3073

if sys.version_info.major == 2:

3074

clients_data, old_client_settings = pickle.load(

3075

stored_state)

3076

else:

3077

bytes_clients_data, bytes_old_client_settings = (

3078

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

3079

### Fix bytes to strings

3080

## clients_data

3081

# .keys()

3082

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

3083

if isinstance(key, bytes)

3084

else key): value

3085

for key, value in

3086

bytes_clients_data.items() }

3087

del bytes_clients_data

3088

for key in clients_data:

3089

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

3090

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

3091

for k, v in

3092

clients_data[key].items() }

3093

clients_data[key] = value

3094

# .client_structure

3095

value["client_structure"] = [

3096

(s.decode("utf-8")

3097

if isinstance(s, bytes)

3098

else s) for s in

3099

value["client_structure"] ]

3100

# .name & .host

3101

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

3102

if isinstance(value[k], bytes):

3103

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

3104

## old_client_settings

3105

# .keys()

3106

old_client_settings = {

3107

(key.decode("utf-8")

3108

if isinstance(key, bytes)

3109

else key): value

3110

for key, value in

3111

bytes_old_client_settings.items() }

3112

del bytes_old_client_settings

3113

# .host

3114

for value in old_client_settings.values():

3115

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

3116

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

3117

.decode("utf-8"))

2783

clients_data, old_client_settings = pickle.load(

2784

stored_state)

3118

2785

os.remove(stored_state_path)

3119

2786

except IOError as e:

3120

2787

if e.errno == errno.ENOENT:

3221

2888

del pidfile

3222

2889

del pidfilename

3223

2890

3224

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

3225

GLib.unix_signal_add(GLib.PRIORITY_HIGH, termsig,

3226

lambda: main_loop.quit() and False)

2891

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

2892

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

3227

2893

3228

2894

if use_dbus:

3229

2895

3260

2926

def GetAllClients(self):

3261

2927

"D-Bus method"

3262

2928

return dbus.Array(c.dbus_object_path for c in

3263

tcp_server.clients.values())

2929

tcp_server.clients.itervalues())

3264

2930

3265

2931

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

3266

2932

"true"})

3271

2937

return dbus.Dictionary(

3272

2938

{ c.dbus_object_path: c.GetAll(

3273

2939

"se.recompile.Mandos.Client")

3274

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

2940

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

3275

2941

signature="oa{sv}")

3276

2942

3277

2943

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

3278

2944

def RemoveClient(self, object_path):

3279

2945

"D-Bus method"

3280

for c in tcp_server.clients.values():

2946

for c in tcp_server.clients.itervalues():

3281

2947

if c.dbus_object_path == object_path:

3282

2948

del tcp_server.clients[c.name]

3283

2949

c.remove_from_connection()

3328

2994

3329

2995

mandos_dbus_service = MandosDBusService()

3330

2996

3331

# Save modules to variables to exempt the modules from being

3332

# unloaded before the function registered with atexit() is run.

3333

mp = multiprocessing

3334

wn = wnull

3335

2997

def cleanup():

3336

2998

"Cleanup function; run on exit"

3337

2999

if zeroconf:

3338

3000

service.cleanup()

3339

3001

3340

mp.active_children()

3341

wn.close()

3002

multiprocessing.active_children()

3003

wnull.close()

3342

3004

if not (tcp_server.clients or client_settings):

3343

3005

return

3344

3006

3347

3009

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

3348

3010

clients = {}

3349

3011

with PGPEngine() as pgp:

3350

for client in tcp_server.clients.values():

3012

for client in tcp_server.clients.itervalues():

3351

3013

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

3352

3014

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

3353

3015

key)

3377

3039

prefix='clients-',

3378

3040

dir=os.path.dirname(stored_state_path),

3379

3041

delete=False) as stored_state:

3380

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

3381

protocol = 2)

3042

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

3382

3043

tempname = stored_state.name

3383

3044

os.rename(tempname, stored_state_path)

3384

3045

except (IOError, OSError) as e:

3403

3064

# Don't signal the disabling

3404

3065

client.disable(quiet=True)

3405

3066

# Emit D-Bus signal for removal

3406

if use_dbus:

3407

mandos_dbus_service.client_removed_signal(client)

3067

mandos_dbus_service.client_removed_signal(client)

3408

3068

client_settings.clear()

3409

3069

3410

3070

atexit.register(cleanup)

3411

3071

3412

for client in tcp_server.clients.values():

3072

for client in tcp_server.clients.itervalues():

3413

3073

if use_dbus:

3414

3074

# Emit D-Bus signal for adding

3415

3075

mandos_dbus_service.client_added_signal(client)

3444

3104

sys.exit(1)

3445

3105

# End of Avahi example code

3446

3106

3447

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

3448

lambda *args, **kwargs:

3449

(tcp_server.handle_request

3450

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

3107

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

3108

lambda *args, **kwargs:

3109

(tcp_server.handle_request

3110

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

3451

3111

3452

3112

logger.debug("Starting main loop")

3453

3113

main_loop.run()