/mandos/trunk : revision 777

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 = "1.7.9"

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version = "1.6.9"

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stored_state_file = "clients.pickle"

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logger = logging.getLogger()

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return interface_index

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def copy_function(func):

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

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if sys.version_info.major == 2:

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return types.FunctionType(func.func_code,

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func.func_globals,

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func.func_name,

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func.func_defaults,

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func.func_closure)

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else:

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return types.FunctionType(func.__code__,

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func.__globals__,

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func.__name__,

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func.__defaults__,

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func.__closure__)

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

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"""init logger and add loglevel"""

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def __init__(self):

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

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self.gpg = "gpg"

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try:

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

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for line in output.splitlines():

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

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if name == "gpg":

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self.gpg = path

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break

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except OSError as e:

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if e.errno != errno.ENOENT:

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raise

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self.gnupgargs = ['--batch',

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'--homedir', self.tempdir,

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'--home', self.tempdir,

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'--force-mdc',

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'--quiet']

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# 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()

299

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class AvahiError(Exception):

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

498

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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):

510

# 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

518

# 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

525

CLIENT = 2

526

SHUT_RDWR = 0

527

CRD_CERTIFICATE = 1

528

E_NO_CERTIFICATE_FOUND = -49

529

OPENPGP_FMT_RAW = 0 # gnutls/openpgp.h

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531

# Types

532

class session_int(ctypes.Structure):

533

_fields_ = []

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session_t = ctypes.POINTER(session_int)

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class certificate_credentials_st(ctypes.Structure):

536

_fields_ = []

537

certificate_credentials_t = ctypes.POINTER(

538

certificate_credentials_st)

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certificate_type_t = ctypes.c_int

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class datum_t(ctypes.Structure):

541

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

542

('size', ctypes.c_uint)]

543

class openpgp_crt_int(ctypes.Structure):

544

_fields_ = []

545

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

549

transport_ptr_t = ctypes.c_void_p

550

close_request_t = ctypes.c_int

551

552

# Exceptions

553

class Error(Exception):

554

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

555

# 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

570

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)

581

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)

611

612

def bye(self):

613

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

614

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

1162

842

access="r")

1163

843

def Property_dbus_property(self):

1164

844

return dbus.Boolean(False)

1165

1166

See also the DBusObjectWithAnnotations class.

1167

845

"""

1168

846

1169

847

def decorator(func):

1191

869

pass

1192

870

1193

871

1194

class DBusObjectWithAnnotations(dbus.service.Object):

1195

"""A D-Bus object with annotations.

872

class DBusObjectWithProperties(dbus.service.Object):

873

"""A D-Bus object with properties.

1196

874

1197

Classes inheriting from this can use the dbus_annotations

1198

decorator to add annotations to methods or signals.

875

Classes inheriting from this can use the dbus_service_property

876

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

877

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

1199

878

"""

1200

879

1201

880

@staticmethod

1217

896

for name, athing in

1218

897

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

1219

898

1220

@dbus.service.method(dbus.INTROSPECTABLE_IFACE,

1221

out_signature = "s",

1222

path_keyword = 'object_path',

1223

connection_keyword = 'connection')

1224

def Introspect(self, object_path, connection):

1225

"""Overloading of standard D-Bus method.

1226

1227

Inserts annotation tags on methods and signals.

1228

"""

1229

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

1230

connection)

1231

try:

1232

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

1233

1234

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

1235

# Add annotation tags

1236

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

1237

for tag in if_tag.getElementsByTagName(typ):

1238

annots = dict()

1239

for name, prop in (self.

1240

_get_all_dbus_things(typ)):

1241

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

1242

and prop._dbus_interface

1243

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

1244

annots.update(getattr(

1245

prop, "_dbus_annotations", {}))

1246

for name, value in annots.items():

1247

ann_tag = document.createElement(

1248

"annotation")

1249

ann_tag.setAttribute("name", name)

1250

ann_tag.setAttribute("value", value)

1251

tag.appendChild(ann_tag)

1252

# Add interface annotation tags

1253

for annotation, value in dict(

1254

itertools.chain.from_iterable(

1255

annotations().items()

1256

for name, annotations

1257

in self._get_all_dbus_things("interface")

1258

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

1259

)).items():

1260

ann_tag = document.createElement("annotation")

1261

ann_tag.setAttribute("name", annotation)

1262

ann_tag.setAttribute("value", value)

1263

if_tag.appendChild(ann_tag)

1264

# Fix argument name for the Introspect method itself

1265

if (if_tag.getAttribute("name")

1266

== dbus.INTROSPECTABLE_IFACE):

1267

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

1268

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

1269

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

1270

if (arg.getAttribute("direction")

1271

== "out"):

1272

arg.setAttribute("name",

1273

"xml_data")

1274

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

1275

document.unlink()

1276

except (AttributeError, xml.dom.DOMException,

1277

xml.parsers.expat.ExpatError) as error:

1278

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

1279

exc_info=error)

1280

return xmlstring

1281

1282

1283

class DBusObjectWithProperties(DBusObjectWithAnnotations):

1284

"""A D-Bus object with properties.

1285

1286

Classes inheriting from this can use the dbus_service_property

1287

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

1288

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

1289

"""

1290

1291

899

def _get_dbus_property(self, interface_name, property_name):

1292

900

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

1293

901

property with the specified name and interface.

1303

911

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

1304

912

self.dbus_object_path, interface_name, property_name))

1305

913

1306

@classmethod

1307

def _get_all_interface_names(cls):

1308

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

1309

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

1310

"_dbus_interface", None)

1311

for x in (inspect.getmro(cls))

1312

for attr in dir(x))

1313

if name is not None)

1314

1315

914

@dbus.service.method(dbus.PROPERTIES_IFACE,

1316

915

in_signature="ss",

1317

916

out_signature="v")

1387

986

1388

987

Inserts property tags and interface annotation tags.

1389

988

"""

1390

xmlstring = DBusObjectWithAnnotations.Introspect(self,

1391

object_path,

1392

connection)

989

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

990

connection)

1393

991

try:

1394

992

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

1395

993

1408

1006

if prop._dbus_interface

1409

1007

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

1410

1008

if_tag.appendChild(tag)

1411

# Add annotation tags for properties

1412

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

1413

annots = dict()

1414

for name, prop in self._get_all_dbus_things(

1415

"property"):

1416

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

1417

and prop._dbus_interface

1418

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

1419

annots.update(getattr(

1420

prop, "_dbus_annotations", {}))

1421

for name, value in annots.items():

1422

ann_tag = document.createElement(

1423

"annotation")

1424

ann_tag.setAttribute("name", name)

1425

ann_tag.setAttribute("value", value)

1426

tag.appendChild(ann_tag)

1009

# Add annotation tags

1010

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

1011

for tag in if_tag.getElementsByTagName(typ):

1012

annots = dict()

1013

for name, prop in (self.

1014

_get_all_dbus_things(typ)):

1015

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

1016

and prop._dbus_interface

1017

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

1018

annots.update(getattr(

1019

prop, "_dbus_annotations", {}))

1020

for name, value in annots.items():

1021

ann_tag = document.createElement(

1022

"annotation")

1023

ann_tag.setAttribute("name", name)

1024

ann_tag.setAttribute("value", value)

1025

tag.appendChild(ann_tag)

1026

# Add interface annotation tags

1027

for annotation, value in dict(

1028

itertools.chain.from_iterable(

1029

annotations().items()

1030

for name, annotations

1031

in self._get_all_dbus_things("interface")

1032

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

1033

)).items():

1034

ann_tag = document.createElement("annotation")

1035

ann_tag.setAttribute("name", annotation)

1036

ann_tag.setAttribute("value", value)

1037

if_tag.appendChild(ann_tag)

1427

1038

# Add the names to the return values for the

1428

1039

# "org.freedesktop.DBus.Properties" methods

1429

1040

if (if_tag.getAttribute("name")

1447

1058

exc_info=error)

1448

1059

return xmlstring

1449

1060

1450

try:

1451

dbus.OBJECT_MANAGER_IFACE

1452

except AttributeError:

1453

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

1454

1455

class DBusObjectWithObjectManager(DBusObjectWithAnnotations):

1456

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

1457

1458

Classes inheriting from this exposes the standard

1459

GetManagedObjects call and the InterfacesAdded and

1460

InterfacesRemoved signals on the standard

1461

"org.freedesktop.DBus.ObjectManager" interface.

1462

1463

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

1464

manually.

1465

"""

1466

@dbus.service.method(dbus.OBJECT_MANAGER_IFACE,

1467

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

1468

def GetManagedObjects(self):

1469

"""This function must be overridden"""

1470

raise NotImplementedError()

1471

1472

@dbus.service.signal(dbus.OBJECT_MANAGER_IFACE,

1473

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

1474

def InterfacesAdded(self, object_path, interfaces_and_properties):

1475

pass

1476

1477

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

1478

def InterfacesRemoved(self, object_path, interfaces):

1479

pass

1480

1481

@dbus.service.method(dbus.INTROSPECTABLE_IFACE,

1482

out_signature = "s",

1483

path_keyword = 'object_path',

1484

connection_keyword = 'connection')

1485

def Introspect(self, object_path, connection):

1486

"""Overloading of standard D-Bus method.

1487

1488

Override return argument name of GetManagedObjects to be

1489

"objpath_interfaces_and_properties"

1490

"""

1491

xmlstring = DBusObjectWithAnnotations.Introspect(self,

1492

object_path,

1493

connection)

1494

try:

1495

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

1496

1497

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

1498

# Fix argument name for the GetManagedObjects method

1499

if (if_tag.getAttribute("name")

1500

== dbus.OBJECT_MANAGER_IFACE):

1501

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

1502

if (cn.getAttribute("name")

1503

== "GetManagedObjects"):

1504

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

1505

if (arg.getAttribute("direction")

1506

== "out"):

1507

arg.setAttribute(

1508

"name",

1509

"objpath_interfaces"

1510

"_and_properties")

1511

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

1512

document.unlink()

1513

except (AttributeError, xml.dom.DOMException,

1514

xml.parsers.expat.ExpatError) as error:

1515

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

1516

exc_info = error)

1517

return xmlstring

1518

1061

1519

1062

def datetime_to_dbus(dt, variant_level=0):

1520

1063

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

1567

1110

interface_names.add(alt_interface)

1568

1111

# Is this a D-Bus signal?

1569

1112

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

1570

# Extract the original non-method undecorated

1571

# function by black magic

1572

1113

if sys.version_info.major == 2:

1114

# Extract the original non-method undecorated

1115

# function by black magic

1573

1116

nonmethod_func = (dict(

1574

1117

zip(attribute.func_code.co_freevars,

1575

1118

attribute.__closure__))

1576

1119

["func"].cell_contents)

1577

1120

else:

1578

nonmethod_func = (dict(

1579

zip(attribute.__code__.co_freevars,

1580

attribute.__closure__))

1581

["func"].cell_contents)

1121

nonmethod_func = attribute

1582

1122

# Create a new, but exactly alike, function

1583

1123

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

1584

1124

# with the alternate D-Bus interface name

1585

new_function = copy_function(nonmethod_func)

1125

if sys.version_info.major == 2:

1126

new_function = types.FunctionType(

1127

nonmethod_func.func_code,

1128

nonmethod_func.func_globals,

1129

nonmethod_func.func_name,

1130

nonmethod_func.func_defaults,

1131

nonmethod_func.func_closure)

1132

else:

1133

new_function = types.FunctionType(

1134

nonmethod_func.__code__,

1135

nonmethod_func.__globals__,

1136

nonmethod_func.__name__,

1137

nonmethod_func.__defaults__,

1138

nonmethod_func.__closure__)

1586

1139

new_function = (dbus.service.signal(

1587

1140

alt_interface,

1588

1141

attribute._dbus_signature)(new_function))

1601

1154

func1 and func2 to the "call_both" function

1602

1155

outside of its arguments"""

1603

1156

1604

@functools.wraps(func2)

1605

1157

def call_both(*args, **kwargs):

1606

1158

"""This function will emit two D-Bus

1607

1159

signals by calling func1 and func2"""

1608

1160

func1(*args, **kwargs)

1609

1161

func2(*args, **kwargs)

1610

# Make wrapper function look like a D-Bus signal

1611

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

1612

if name.startswith("_dbus_"):

1613

setattr(call_both, name, attr)

1614

1162

1615

1163

return call_both

1616

1164

# Create the "call_both" function and add it to

1627

1175

alt_interface,

1628

1176

attribute._dbus_in_signature,

1629

1177

attribute._dbus_out_signature)

1630

(copy_function(attribute)))

1178

(types.FunctionType(attribute.func_code,

1179

attribute.func_globals,

1180

attribute.func_name,

1181

attribute.func_defaults,

1182

attribute.func_closure)))

1631

1183

# Copy annotations, if any

1632

1184

try:

1633

1185

attr[attrname]._dbus_annotations = dict(

1645

1197

attribute._dbus_access,

1646

1198

attribute._dbus_get_args_options

1647

1199

["byte_arrays"])

1648

(copy_function(attribute)))

1200

(types.FunctionType(

1201

attribute.func_code,

1202

attribute.func_globals,

1203

attribute.func_name,

1204

attribute.func_defaults,

1205

attribute.func_closure)))

1649

1206

# Copy annotations, if any

1650

1207

try:

1651

1208

attr[attrname]._dbus_annotations = dict(

1660

1217

# to the class.

1661

1218

attr[attrname] = (

1662

1219

dbus_interface_annotations(alt_interface)

1663

(copy_function(attribute)))

1220

(types.FunctionType(attribute.func_code,

1221

attribute.func_globals,

1222

attribute.func_name,

1223

attribute.func_defaults,

1224

attribute.func_closure)))

1664

1225

if deprecate:

1665

1226

# Deprecate all alternate interfaces

1666

1227

iname="_AlternateDBusNames_interface_annotation{}"

1679

1240

if interface_names:

1680

1241

# Replace the class with a new subclass of it with

1681

1242

# 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)

1243

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

1244

(cls, ), attr)

1688

1245

return cls

1689

1246

1690

1247

return wrapper

1819

1376

if exitstatus >= 0:

1820

1377

# Emit D-Bus signal

1821

1378

self.CheckerCompleted(dbus.Int16(exitstatus),

1822

# This is specific to GNU libC

1823

dbus.Int64(exitstatus << 8),

1379

dbus.Int64(0),

1824

1380

dbus.String(command))

1825

1381

else:

1826

1382

# Emit D-Bus signal

1827

1383

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

1828

1384

dbus.Int64(

1829

# This is specific to GNU libC

1830

(exitstatus << 8)

1831

| self.last_checker_signal),

1385

self.last_checker_signal),

1832

1386

dbus.String(command))

1833

1387

return ret

1834

1388

1848

1402

1849

1403

def approve(self, value=True):

1850

1404

self.approved = value

1851

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

1852

* 1000), self._reset_approved)

1405

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

1406

* 1000), self._reset_approved)

1853

1407

self.send_changedstate()

1854

1408

1855

1409

## D-Bus methods, signals & properties

1911

1465

self.checked_ok()

1912

1466

1913

1467

# Enable - method

1914

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

1915

1468

@dbus.service.method(_interface)

1916

1469

def Enable(self):

1917

1470

"D-Bus method"

1918

1471

self.enable()

1919

1472

1920

1473

# StartChecker - method

1921

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

1922

1474

@dbus.service.method(_interface)

1923

1475

def StartChecker(self):

1924

1476

"D-Bus method"

1925

1477

self.start_checker()

1926

1478

1927

1479

# Disable - method

1928

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

1929

1480

@dbus.service.method(_interface)

1930

1481

def Disable(self):

1931

1482

"D-Bus method"

1932

1483

self.disable()

1933

1484

1934

1485

# StopChecker - method

1935

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

1936

1486

@dbus.service.method(_interface)

1937

1487

def StopChecker(self):

1938

1488

self.stop_checker()

1974

1524

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

1975

1525

1976

1526

# Name - property

1977

@dbus_annotations(

1978

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

1979

1527

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

1980

1528

def Name_dbus_property(self):

1981

1529

return dbus.String(self.name)

1982

1530

1983

1531

# Fingerprint - property

1984

@dbus_annotations(

1985

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

1986

1532

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

1987

1533

def Fingerprint_dbus_property(self):

1988

1534

return dbus.String(self.fingerprint)

1997

1543

self.host = str(value)

1998

1544

1999

1545

# Created - property

2000

@dbus_annotations(

2001

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

2002

1546

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

2003

1547

def Created_dbus_property(self):

2004

1548

return datetime_to_dbus(self.created)

2065

1609

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

2066

1610

is None):

2067

1611

return

2068

GLib.source_remove(self.disable_initiator_tag)

2069

self.disable_initiator_tag = GLib.timeout_add(

1612

gobject.source_remove(self.disable_initiator_tag)

1613

self.disable_initiator_tag = gobject.timeout_add(

2070

1614

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

2071

1615

self.disable)

2072

1616

2092

1636

return

2093

1637

if self.enabled:

2094

1638

# Reschedule checker run

2095

GLib.source_remove(self.checker_initiator_tag)

2096

self.checker_initiator_tag = GLib.timeout_add(

1639

gobject.source_remove(self.checker_initiator_tag)

1640

self.checker_initiator_tag = gobject.timeout_add(

2097

1641

value, self.start_checker)

2098

1642

self.start_checker() # Start one now, too

2099

1643

2119

1663

self.stop_checker()

2120

1664

2121

1665

# ObjectPath - property

2122

@dbus_annotations(

2123

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

2124

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

2125

1666

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

2126

1667

def ObjectPath_dbus_property(self):

2127

1668

return self.dbus_object_path # is already a dbus.ObjectPath

2128

1669

2129

1670

# Secret = property

2130

@dbus_annotations(

2131

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

2132

"invalidates"})

2133

1671

@dbus_service_property(_interface,

2134

1672

signature="ay",

2135

1673

access="write",

2181

1719

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

2182

1720

self.server.child_pipe.fileno())

2183

1721

2184

session = gnutls.ClientSession(self.request)

1722

session = gnutls.connection.ClientSession(

1723

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

1724

1725

# Note: gnutls.connection.X509Credentials is really a

1726

# generic GnuTLS certificate credentials object so long as

1727

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

1728

# here despite using OpenPGP certificates.

2185

1729

2186

1730

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

2187

1731

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

2191

1735

priority = self.server.gnutls_priority

2192

1736

if priority is None:

2193

1737

priority = "NORMAL"

2194

gnutls.priority_set_direct(session._c_object,

2195

priority.encode("utf-8"),

2196

None)

1738

gnutls.library.functions.gnutls_priority_set_direct(

1739

session._c_object, priority, None)

2197

1740

2198

1741

# Start communication using the Mandos protocol

2199

1742

# Get protocol number

2209

1752

# Start GnuTLS connection

2210

1753

try:

2211

1754

session.handshake()

2212

except gnutls.Error as error:

1755

except gnutls.errors.GNUTLSError as error:

2213

1756

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

2214

1757

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

2215

1758

# established. Just abandon the request.

2221

1764

try:

2222

1765

fpr = self.fingerprint(

2223

1766

self.peer_certificate(session))

2224

except (TypeError, gnutls.Error) as error:

1767

except (TypeError,

1768

gnutls.errors.GNUTLSError) as error:

2225

1769

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

2226

1770

return

2227

1771

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

2285

1829

else:

2286

1830

delay -= time2 - time

2287

1831

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

1832

sent_size = 0

1833

while sent_size < len(client.secret):

1834

try:

1835

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

1836

except gnutls.errors.GNUTLSError as error:

1837

logger.warning("gnutls send failed",

1838

exc_info=error)

1839

return

1840

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

1841

len(client.secret) - (sent_size

1842

+ sent))

1843

sent_size += sent

2294

1844

2295

1845

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

2296

1846

# bump the timeout using extended_timeout

2304

1854

client.approvals_pending -= 1

2305

1855

try:

2306

1856

session.bye()

2307

except gnutls.Error as error:

1857

except gnutls.errors.GNUTLSError as error:

2308

1858

logger.warning("GnuTLS bye failed",

2309

1859

exc_info=error)

2310

1860

2312

1862

def peer_certificate(session):

2313

1863

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

2314

1864

# 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""

1865

if (gnutls.library.functions.gnutls_certificate_type_get(

1866

session._c_object)

1867

!= gnutls.library.constants.GNUTLS_CRT_OPENPGP):

1868

# ...do the normal thing

1869

return session.peer_certificate

2319

1870

list_size = ctypes.c_uint(1)

2320

cert_list = (gnutls.certificate_get_peers

1871

cert_list = (gnutls.library.functions

1872

.gnutls_certificate_get_peers

2321

1873

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

2322

1874

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

2323

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

1875

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

1876

" certificate")

2324

1877

if list_size.value == 0:

2325

1878

return None

2326

1879

cert = cert_list[0]

2330

1883

def fingerprint(openpgp):

2331

1884

"Convert an OpenPGP bytestring to a hexdigit fingerprint"

2332

1885

# New GnuTLS "datum" with the OpenPGP public key

2333

datum = gnutls.datum_t(

1886

datum = gnutls.library.types.gnutls_datum_t(

2334

1887

ctypes.cast(ctypes.c_char_p(openpgp),

2335

1888

ctypes.POINTER(ctypes.c_ubyte)),

2336

1889

ctypes.c_uint(len(openpgp)))

2337

1890

# New empty GnuTLS certificate

2338

crt = gnutls.openpgp_crt_t()

2339

gnutls.openpgp_crt_init(ctypes.byref(crt))

1891

crt = gnutls.library.types.gnutls_openpgp_crt_t()

1892

gnutls.library.functions.gnutls_openpgp_crt_init(

1893

ctypes.byref(crt))

2340

1894

# Import the OpenPGP public key into the certificate

2341

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

2342

gnutls.OPENPGP_FMT_RAW)

1895

gnutls.library.functions.gnutls_openpgp_crt_import(

1896

crt, ctypes.byref(datum),

1897

gnutls.library.constants.GNUTLS_OPENPGP_FMT_RAW)

2343

1898

# Verify the self signature in the key

2344

1899

crtverify = ctypes.c_uint()

2345

gnutls.openpgp_crt_verify_self(crt, 0,

2346

ctypes.byref(crtverify))

1900

gnutls.library.functions.gnutls_openpgp_crt_verify_self(

1901

crt, 0, ctypes.byref(crtverify))

2347

1902

if crtverify.value != 0:

2348

gnutls.openpgp_crt_deinit(crt)

2349

raise gnutls.CertificateSecurityError("Verify failed")

1903

gnutls.library.functions.gnutls_openpgp_crt_deinit(crt)

1904

raise gnutls.errors.CertificateSecurityError(

1905

"Verify failed")

2350

1906

# New buffer for the fingerprint

2351

1907

buf = ctypes.create_string_buffer(20)

2352

1908

buf_len = ctypes.c_size_t()

2353

1909

# Get the fingerprint from the certificate into the buffer

2354

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

2355

ctypes.byref(buf_len))

1910

gnutls.library.functions.gnutls_openpgp_crt_get_fingerprint(

1911

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

2356

1912

# Deinit the certificate

2357

gnutls.openpgp_crt_deinit(crt)

1913

gnutls.library.functions.gnutls_openpgp_crt_deinit(crt)

2358

1914

# Convert the buffer to a Python bytestring

2359

1915

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

2360

1916

# Convert the bytestring to hexadecimal notation

2455

2011

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

2456

2012

if self.interface is not None:

2457

2013

if SO_BINDTODEVICE is None:

2458

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

2459

# common enough.

2460

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

2461

SO_BINDTODEVICE = 25

2462

try:

2463

self.socket.setsockopt(

2464

socket.SOL_SOCKET, SO_BINDTODEVICE,

2465

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

2466

except socket.error as error:

2467

if error.errno == errno.EPERM:

2468

logger.error("No permission to bind to"

2469

" interface %s", self.interface)

2470

elif error.errno == errno.ENOPROTOOPT:

2471

logger.error("SO_BINDTODEVICE not available;"

2472

" cannot bind to interface %s",

2473

self.interface)

2474

elif error.errno == errno.ENODEV:

2475

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

2476

" cannot bind", self.interface)

2477

else:

2478

raise

2014

logger.error("SO_BINDTODEVICE does not exist;"

2015

" cannot bind to interface %s",

2016

self.interface)

2017

else:

2018

try:

2019

self.socket.setsockopt(

2020

socket.SOL_SOCKET, SO_BINDTODEVICE,

2021

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

2022

except socket.error as error:

2023

if error.errno == errno.EPERM:

2024

logger.error("No permission to bind to"

2025

" interface %s", self.interface)

2026

elif error.errno == errno.ENOPROTOOPT:

2027

logger.error("SO_BINDTODEVICE not available;"

2028

" cannot bind to interface %s",

2029

self.interface)

2030

elif error.errno == errno.ENODEV:

2031

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

2032

" cannot bind", self.interface)

2033

else:

2034

raise

2479

2035

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

2480

2036

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

2481

2037

if not self.server_address[0]:

2504

2060

gnutls_priority GnuTLS priority string

2505

2061

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

2506

2062

2507

Assumes a GLib.MainLoop event loop.

2063

Assumes a gobject.MainLoop event loop.

2508

2064

"""

2509

2065

2510

2066

def __init__(self, server_address, RequestHandlerClass,

2535

2091

2536

2092

def add_pipe(self, parent_pipe, proc):

2537

2093

# Call "handle_ipc" for both data and EOF events

2538

GLib.io_add_watch(

2094

gobject.io_add_watch(

2539

2095

parent_pipe.fileno(),

2540

GLib.IO_IN | GLib.IO_HUP,

2096

gobject.IO_IN | gobject.IO_HUP,

2541

2097

functools.partial(self.handle_ipc,

2542

2098

parent_pipe = parent_pipe,

2543

2099

proc = proc))

2547

2103

proc = None,

2548

2104

client_object=None):

2549

2105

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

2550

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

2106

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

2551

2107

# Wait for other process to exit

2552

2108

proc.join()

2553

2109

return False

2560

2116

fpr = request[1]

2561

2117

address = request[2]

2562

2118

2563

for c in self.clients.values():

2119

for c in self.clients.itervalues():

2564

2120

if c.fingerprint == fpr:

2565

2121

client = c

2566

2122

break

2574

2130

parent_pipe.send(False)

2575

2131

return False

2576

2132

2577

GLib.io_add_watch(

2133

gobject.io_add_watch(

2578

2134

parent_pipe.fileno(),

2579

GLib.IO_IN | GLib.IO_HUP,

2135

gobject.IO_IN | gobject.IO_HUP,

2580

2136

functools.partial(self.handle_ipc,

2581

2137

parent_pipe = parent_pipe,

2582

2138

proc = proc,

2964

2520

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

2965

2521

exc_info=e)

2966

2522

2967

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

2968

("mandos", "mandos"),

2969

("nobody", "nogroup")):

2523

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

2970

2524

try:

2971

2525

uid = pwd.getpwnam(name).pw_uid

2972

gid = pwd.getpwnam(group).pw_gid

2526

gid = pwd.getpwnam(name).pw_gid

2973

2527

break

2974

2528

except KeyError:

2975

2529

continue

2979

2533

try:

2980

2534

os.setgid(gid)

2981

2535

os.setuid(uid)

2982

if debug:

2983

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

2984

gid))

2985

2536

except OSError as error:

2986

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

2987

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

2988

2537

if error.errno != errno.EPERM:

2989

2538

raise

2990

2539

2993

2542

2994

2543

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

2995

2544

# - GnuTLS manual

2996

gnutls.global_set_log_level(11)

2545

gnutls.library.functions.gnutls_global_set_log_level(11)

2997

2546

2998

@gnutls.log_func

2547

@gnutls.library.types.gnutls_log_func

2999

2548

def debug_gnutls(level, string):

3000

2549

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

3001

2550

3002

gnutls.global_set_log_function(debug_gnutls)

2551

gnutls.library.functions.gnutls_global_set_log_function(

2552

debug_gnutls)

3003

2553

3004

2554

# Redirect stdin so all checkers get /dev/null

3005

2555

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

3012

2562

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

3013

2563

daemon()

3014

2564

3015

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

3016

# to inform GLib that threads will be used.

3017

GLib.threads_init()

2565

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

2566

# need to inform gobject that threads will be used.

2567

gobject.threads_init()

3018

2568

3019

2569

global main_loop

3020

2570

# From the Avahi example code

3021

2571

DBusGMainLoop(set_as_default=True)

3022

main_loop = GLib.MainLoop()

2572

main_loop = gobject.MainLoop()

3023

2573

bus = dbus.SystemBus()

3024

2574

# End of Avahi example code

3025

2575

if use_dbus:

3069

2619

if server_settings["restore"]:

3070

2620

try:

3071

2621

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

3072

if sys.version_info.major == 2:

3073

clients_data, old_client_settings = pickle.load(

3074

stored_state)

3075

else:

3076

bytes_clients_data, bytes_old_client_settings = (

3077

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

3078

### Fix bytes to strings

3079

## clients_data

3080

# .keys()

3081

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

3082

if isinstance(key, bytes)

3083

else key): value

3084

for key, value in

3085

bytes_clients_data.items() }

3086

del bytes_clients_data

3087

for key in clients_data:

3088

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

3089

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

3090

for k, v in

3091

clients_data[key].items() }

3092

clients_data[key] = value

3093

# .client_structure

3094

value["client_structure"] = [

3095

(s.decode("utf-8")

3096

if isinstance(s, bytes)

3097

else s) for s in

3098

value["client_structure"] ]

3099

# .name & .host

3100

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

3101

if isinstance(value[k], bytes):

3102

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

3103

## old_client_settings

3104

# .keys()

3105

old_client_settings = {

3106

(key.decode("utf-8")

3107

if isinstance(key, bytes)

3108

else key): value

3109

for key, value in

3110

bytes_old_client_settings.items() }

3111

del bytes_old_client_settings

3112

# .host

3113

for value in old_client_settings.values():

3114

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

3115

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

3116

.decode("utf-8"))

2622

clients_data, old_client_settings = pickle.load(

2623

stored_state)

3117

2624

os.remove(stored_state_path)

3118

2625

except IOError as e:

3119

2626

if e.errno == errno.ENOENT:

3220

2727

del pidfile

3221

2728

del pidfilename

3222

2729

3223

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

3224

GLib.unix_signal_add(GLib.PRIORITY_HIGH, termsig,

3225

lambda: main_loop.quit() and False)

2730

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

2731

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

3226

2732

3227

2733

if use_dbus:

3228

2734

3229

2735

@alternate_dbus_interfaces(

3230

2736

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

3231

class MandosDBusService(DBusObjectWithObjectManager):

2737

class MandosDBusService(DBusObjectWithProperties):

3232

2738

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

3233

2739

3234

2740

def __init__(self):

3236

2742

3237

2743

_interface = "se.recompile.Mandos"

3238

2744

2745

@dbus_interface_annotations(_interface)

2746

def _foo(self):

2747

return {

2748

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

2749

"false" }

2750

3239

2751

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

3240

2752

def ClientAdded(self, objpath):

3241

2753

"D-Bus signal"

3246

2758

"D-Bus signal"

3247

2759

pass

3248

2760

3249

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

3250

"true"})

3251

2761

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

3252

2762

def ClientRemoved(self, objpath, name):

3253

2763

"D-Bus signal"

3254

2764

pass

3255

2765

3256

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

3257

"true"})

3258

2766

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

3259

2767

def GetAllClients(self):

3260

2768

"D-Bus method"

3261

2769

return dbus.Array(c.dbus_object_path for c in

3262

tcp_server.clients.values())

2770

tcp_server.clients.itervalues())

3263

2771

3264

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

3265

"true"})

3266

2772

@dbus.service.method(_interface,

3267

2773

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

3268

2774

def GetAllClientsWithProperties(self):

3269

2775

"D-Bus method"

3270

2776

return dbus.Dictionary(

3271

{ c.dbus_object_path: c.GetAll(

3272

"se.recompile.Mandos.Client")

3273

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

2777

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

2778

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

3274

2779

signature="oa{sv}")

3275

2780

3276

2781

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

3277

2782

def RemoveClient(self, object_path):

3278

2783

"D-Bus method"

3279

for c in tcp_server.clients.values():

2784

for c in tcp_server.clients.itervalues():

3280

2785

if c.dbus_object_path == object_path:

3281

2786

del tcp_server.clients[c.name]

3282

2787

c.remove_from_connection()

3283

# Don't signal the disabling

2788

# Don't signal anything except ClientRemoved

3284

2789

c.disable(quiet=True)

3285

# Emit D-Bus signal for removal

3286

self.client_removed_signal(c)

2790

# Emit D-Bus signal

2791

self.ClientRemoved(object_path, c.name)

3287

2792

return

3288

2793

raise KeyError(object_path)

3289

2794

3290

2795

del _interface

3291

3292

@dbus.service.method(dbus.OBJECT_MANAGER_IFACE,

3293

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

3294

def GetManagedObjects(self):

3295

"""D-Bus method"""

3296

return dbus.Dictionary(

3297

{ client.dbus_object_path:

3298

dbus.Dictionary(

3299

{ interface: client.GetAll(interface)

3300

for interface in

3301

client._get_all_interface_names()})

3302

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

3303

3304

def client_added_signal(self, client):

3305

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

3306

if use_dbus:

3307

# New standard signal

3308

self.InterfacesAdded(

3309

client.dbus_object_path,

3310

dbus.Dictionary(

3311

{ interface: client.GetAll(interface)

3312

for interface in

3313

client._get_all_interface_names()}))

3314

# Old signal

3315

self.ClientAdded(client.dbus_object_path)

3316

3317

def client_removed_signal(self, client):

3318

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

3319

if use_dbus:

3320

# New standard signal

3321

self.InterfacesRemoved(

3322

client.dbus_object_path,

3323

client._get_all_interface_names())

3324

# Old signal

3325

self.ClientRemoved(client.dbus_object_path,

3326

client.name)

3327

2796

3328

2797

mandos_dbus_service = MandosDBusService()

3329

2798

3330

# Save modules to variables to exempt the modules from being

3331

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

3332

mp = multiprocessing

3333

wn = wnull

3334

2799

def cleanup():

3335

2800

"Cleanup function; run on exit"

3336

2801

if zeroconf:

3337

2802

service.cleanup()

3338

2803

3339

mp.active_children()

3340

wn.close()

2804

multiprocessing.active_children()

2805

wnull.close()

3341

2806

if not (tcp_server.clients or client_settings):

3342

2807

return

3343

2808

3346

2811

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

3347

2812

clients = {}

3348

2813

with PGPEngine() as pgp:

3349

for client in tcp_server.clients.values():

2814

for client in tcp_server.clients.itervalues():

3350

2815

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

3351

2816

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

3352

2817

key)

3376

2841

prefix='clients-',

3377

2842

dir=os.path.dirname(stored_state_path),

3378

2843

delete=False) as stored_state:

3379

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

3380

protocol = 2)

2844

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

3381

2845

tempname = stored_state.name

3382

2846

os.rename(tempname, stored_state_path)

3383

2847

except (IOError, OSError) as e:

3399

2863

name, client = tcp_server.clients.popitem()

3400

2864

if use_dbus:

3401

2865

client.remove_from_connection()

3402

# Don't signal the disabling

2866

# Don't signal anything except ClientRemoved

3403

2867

client.disable(quiet=True)

3404

# Emit D-Bus signal for removal

3405

2868

if use_dbus:

3406

mandos_dbus_service.client_removed_signal(client)

2869

# Emit D-Bus signal

2870

mandos_dbus_service.ClientRemoved(

2871

client.dbus_object_path, client.name)

3407

2872

client_settings.clear()

3408

2873

3409

2874

atexit.register(cleanup)

3410

2875

3411

for client in tcp_server.clients.values():

2876

for client in tcp_server.clients.itervalues():

3412

2877

if use_dbus:

3413

# Emit D-Bus signal for adding

3414

mandos_dbus_service.client_added_signal(client)

2878

# Emit D-Bus signal

2879

mandos_dbus_service.ClientAdded(client.dbus_object_path)

3415

2880

# Need to initiate checking of clients

3416

2881

if client.enabled:

3417

2882

client.init_checker()

3443

2908

sys.exit(1)

3444

2909

# End of Avahi example code

3445

2910

3446

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

3447

lambda *args, **kwargs:

3448

(tcp_server.handle_request

3449

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

2911

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

2912

lambda *args, **kwargs:

2913

(tcp_server.handle_request

2914

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

3450

2915

3451

2916

logger.debug("Starting main loop")

3452

2917

main_loop.run()