/mandos/trunk : revision 1073

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#!/usr/bin/python3 -bI

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# -*- coding: utf-8; lexical-binding: t -*-

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#!/usr/bin/python

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

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#

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

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#

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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 file is part of Mandos.

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#

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#

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# Contact the authors at <mandos@recompile.se>.

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#

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from __future__ import (division, absolute_import, print_function,

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unicode_literals)

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except ImportError:

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pass

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import sys

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import unittest

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import argparse

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import logging

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import os

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try:

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import SocketServer as socketserver

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except ImportError:

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import socketserver

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import socket

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import argparse

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import datetime

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import errno

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try:

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import ConfigParser as configparser

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except ImportError:

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import configparser

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import sys

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import re

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import os

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import signal

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import subprocess

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import atexit

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import stat

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import logging

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import logging.handlers

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import pwd

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import contextlib

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import itertools

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import collections

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import codecs

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import random

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import shlex

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import dbus

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import dbus.service

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import gi

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from gi.repository import GLib

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from dbus.mainloop.glib import DBusGMainLoop

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import ctypes

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import xml.dom.minidom

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import inspect

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if sys.version_info.major == 2:

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__metaclass__ = type

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str = unicode

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input = raw_input

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# Add collections.abc.Callable if it does not exist

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try:

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collections.abc.Callable

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except AttributeError:

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class abc:

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Callable = collections.Callable

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collections.abc = abc

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del abc

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# Add shlex.quote if it does not exist

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try:

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shlex.quote

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except AttributeError:

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shlex.quote = re.escape

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# Show warnings by default

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if not sys.warnoptions:

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import warnings

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warnings.simplefilter("default")

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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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# No value found

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SO_BINDTODEVICE = None

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if sys.version_info < (3, 2):

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configparser.Configparser = configparser.SafeConfigParser

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if sys.version_info.major == 2:

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str = unicode

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version = "1.8.16"

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version = "1.8.3"

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stored_state_file = "clients.pickle"

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log = logging.getLogger(os.path.basename(sys.argv[0]))

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logging.captureWarnings(True) # Show warnings via the logging system

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logger = logging.getLogger()

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syslogger = None

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try:

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facility=logging.handlers.SysLogHandler.LOG_DAEMON,

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address="/dev/log"))

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syslogger.setFormatter(logging.Formatter

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("Mandos [%(process)d]: %(levelname)s:"

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" %(message)s"))

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log.addHandler(syslogger)

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('Mandos [%(process)d]: %(levelname)s:'

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' %(message)s'))

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logger.addHandler(syslogger)

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if debug:

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console = logging.StreamHandler()

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console.setFormatter(logging.Formatter("%(asctime)s %(name)s"

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" [%(process)d]:"

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" %(levelname)s:"

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" %(message)s"))

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log.addHandler(console)

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log.setLevel(level)

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console.setFormatter(logging.Formatter('%(asctime)s %(name)s'

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' [%(process)d]:'

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' %(levelname)s:'

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' %(message)s'))

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logger.addHandler(console)

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logger.setLevel(level)

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class PGPError(Exception):

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pass

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class PGPEngine:

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class PGPEngine(object):

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"""A simple class for OpenPGP symmetric encryption & decryption"""

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def __init__(self):

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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 == b"gpg":

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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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"--force-mdc",

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"--quiet"]

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self.gnupgargs = ['--batch',

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'--homedir', 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 == b"gpg" or self.gpg.endswith(b"/gpg"):

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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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def __enter__(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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"--passphrase-file",

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

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'--passphrase-file',

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passfile.name]

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+ self.gnupgargs,

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stdin=subprocess.PIPE,

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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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"--passphrase-file",

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

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'--passphrase-file',

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passfile.name]

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+ self.gnupgargs,

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stdin=subprocess.PIPE,

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# Pretend that we have an Avahi module

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class avahi:

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

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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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DBUS_INTERFACE_SERVER = DBUS_NAME + ".Server"

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DBUS_PATH_SERVER = "/"

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@staticmethod

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def string_array_to_txt_array(t):

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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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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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pass

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class AvahiService:

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class AvahiService(object):

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"""An Avahi (Zeroconf) service.

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Attributes:

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interface: integer; avahi.IF_UNSPEC or an interface index.

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Used to optionally bind to the specified interface.

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name: string; Example: "Mandos"

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type: string; Example: "_mandos._tcp".

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name: string; Example: 'Mandos'

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type: string; Example: '_mandos._tcp'.

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See <https://www.iana.org/assignments/service-names-port-numbers>

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port: integer; what port to announce

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TXT: list of strings; TXT record for the service

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def rename(self, remove=True):

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"""Derived from the Avahi example code"""

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if self.rename_count >= self.max_renames:

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log.critical("No suitable Zeroconf service name found"

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" after %i retries, exiting.",

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self.rename_count)

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logger.critical("No suitable Zeroconf service name found"

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" after %i retries, exiting.",

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self.rename_count)

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raise AvahiServiceError("Too many renames")

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self.name = str(

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self.server.GetAlternativeServiceName(self.name))

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self.rename_count += 1

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log.info("Changing Zeroconf service name to %r ...",

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self.name)

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logger.info("Changing Zeroconf service name to %r ...",

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self.name)

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if remove:

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self.remove()

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try:

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except dbus.exceptions.DBusException as error:

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if (error.get_dbus_name()

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

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log.info("Local Zeroconf service name collision.")

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logger.info("Local Zeroconf service name collision.")

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return self.rename(remove=False)

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else:

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

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

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self.cleanup()

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os._exit(1)

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avahi.DBUS_INTERFACE_ENTRY_GROUP)

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self.entry_group_state_changed_match = (

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self.group.connect_to_signal(

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"StateChanged", self.entry_group_state_changed))

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log.debug("Adding Zeroconf service '%s' of type '%s' ...",

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self.name, self.type)

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'StateChanged', self.entry_group_state_changed))

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logger.debug("Adding Zeroconf service '%s' of type '%s' ...",

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self.name, self.type)

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self.group.AddService(

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self.interface,

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self.protocol,

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def entry_group_state_changed(self, state, error):

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"""Derived from the Avahi example code"""

453

log.debug("Avahi entry group state change: %i", state)

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logger.debug("Avahi entry group state change: %i", state)

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if state == avahi.ENTRY_GROUP_ESTABLISHED:

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log.debug("Zeroconf service established.")

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logger.debug("Zeroconf service established.")

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elif state == avahi.ENTRY_GROUP_COLLISION:

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log.info("Zeroconf service name collision.")

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logger.info("Zeroconf service name collision.")

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self.rename()

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elif state == avahi.ENTRY_GROUP_FAILURE:

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log.critical("Avahi: Error in group state changed %s",

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str(error))

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logger.critical("Avahi: Error in group state changed %s",

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str(error))

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raise AvahiGroupError("State changed: {!s}".format(error))

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def cleanup(self):

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def server_state_changed(self, state, error=None):

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"""Derived from the Avahi example code"""

478

log.debug("Avahi server state change: %i", state)

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logger.debug("Avahi server state change: %i", state)

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bad_states = {

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avahi.SERVER_INVALID: "Zeroconf server invalid",

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avahi.SERVER_REGISTERING: None,

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if state in bad_states:

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if bad_states[state] is not None:

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if error is None:

488

log.error(bad_states[state])

460

logger.error(bad_states[state])

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else:

490

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

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

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self.cleanup()

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elif state == avahi.SERVER_RUNNING:

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try:

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except dbus.exceptions.DBusException as error:

496

468

if (error.get_dbus_name()

497

469

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

498

log.info("Local Zeroconf service name collision.")

470

logger.info("Local Zeroconf service name"

471

" collision.")

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return self.rename(remove=False)

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else:

501

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

474

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

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self.cleanup()

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os._exit(1)

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477

else:

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if error is None:

506

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

479

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

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480

else:

508

log.debug("Unknown state: %r: %r", state, error)

481

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

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510

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def activate(self):

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"""Derived from the Avahi example code"""

523

496

class AvahiServiceToSyslog(AvahiService):

524

497

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

525

498

"""Add the new name to the syslog messages"""

526

ret = super(AvahiServiceToSyslog, self).rename(*args,

527

**kwargs)

499

ret = super(AvahiServiceToSyslog, self).rename(*args, **kwargs)

528

500

syslogger.setFormatter(logging.Formatter(

529

"Mandos ({}) [%(process)d]: %(levelname)s: %(message)s"

501

'Mandos ({}) [%(process)d]: %(levelname)s: %(message)s'

530

502

.format(self.name)))

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503

return ret

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534

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# Pretend that we have a GnuTLS module

535

class gnutls:

536

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

507

class GnuTLS(object):

508

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

509

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

537

510

538

511

library = ctypes.util.find_library("gnutls")

539

512

if library is None:

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513

library = ctypes.util.find_library("gnutls-deb0")

541

514

_library = ctypes.cdll.LoadLibrary(library)

542

515

del library

516

_need_version = b"3.3.0"

517

_tls_rawpk_version = b"3.6.6"

518

519

def __init__(self):

520

# Need to use "self" here, since this method is called before

521

# the assignment to the "gnutls" global variable happens.

522

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

523

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

524

.format(self._need_version))

543

525

544

526

# Unless otherwise indicated, the constants and types below are

545

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

562

544

OPENPGP_FMT_RAW = 0 # gnutls/openpgp.h

563

545

564

546

# Types

565

class _session_int(ctypes.Structure):

547

class session_int(ctypes.Structure):

566

548

_fields_ = []

567

session_t = ctypes.POINTER(_session_int)

549

session_t = ctypes.POINTER(session_int)

568

550

569

551

class certificate_credentials_st(ctypes.Structure):

570

552

_fields_ = []

573

555

certificate_type_t = ctypes.c_int

574

556

575

557

class datum_t(ctypes.Structure):

576

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

577

("size", ctypes.c_uint)]

558

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

559

('size', ctypes.c_uint)]

578

560

579

class _openpgp_crt_int(ctypes.Structure):

561

class openpgp_crt_int(ctypes.Structure):

580

562

_fields_ = []

581

openpgp_crt_t = ctypes.POINTER(_openpgp_crt_int)

563

openpgp_crt_t = ctypes.POINTER(openpgp_crt_int)

582

564

openpgp_crt_fmt_t = ctypes.c_int # gnutls/openpgp.h

583

565

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

584

566

credentials_type_t = ctypes.c_int

587

569

588

570

# Exceptions

589

571

class Error(Exception):

572

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

573

# exception might be raised from within GnuTLS.__init__,

574

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

575

# global variable has happened.

590

576

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

591

577

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

592

578

# code is passed, convert it to a string with

593

579

# gnutls.strerror()

594

580

self.code = code

595

581

if message is None and code is not None:

596

message = gnutls.strerror(code).decode(

597

"utf-8", errors="replace")

598

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

582

message = GnuTLS.strerror(code)

583

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

599

584

message, *args)

600

585

601

586

class CertificateSecurityError(Error):

602

587

pass

603

588

604

class PointerTo:

605

def __init__(self, cls):

606

self.cls = cls

607

608

def from_param(self, obj):

609

if not isinstance(obj, self.cls):

610

raise TypeError("Not of type {}: {!r}"

611

.format(self.cls.__name__, obj))

612

return ctypes.byref(obj.from_param(obj))

613

614

class CastToVoidPointer:

615

def __init__(self, cls):

616

self.cls = cls

617

618

def from_param(self, obj):

619

if not isinstance(obj, self.cls):

620

raise TypeError("Not of type {}: {!r}"

621

.format(self.cls.__name__, obj))

622

return ctypes.cast(obj.from_param(obj), ctypes.c_void_p)

623

624

class With_from_param:

625

@classmethod

626

def from_param(cls, obj):

627

return obj._as_parameter_

628

629

589

# Classes

630

class Credentials(With_from_param):

590

class Credentials(object):

631

591

def __init__(self):

632

self._as_parameter_ = gnutls.certificate_credentials_t()

633

gnutls.certificate_allocate_credentials(self)

592

self._c_object = gnutls.certificate_credentials_t()

593

gnutls.certificate_allocate_credentials(

594

ctypes.byref(self._c_object))

634

595

self.type = gnutls.CRD_CERTIFICATE

635

596

636

597

def __del__(self):

637

gnutls.certificate_free_credentials(self)

598

gnutls.certificate_free_credentials(self._c_object)

638

599

639

class ClientSession(With_from_param):

600

class ClientSession(object):

640

601

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

641

self._as_parameter_ = gnutls.session_t()

602

self._c_object = gnutls.session_t()

642

603

gnutls_flags = gnutls.CLIENT

643

if gnutls.check_version(b"3.5.6"):

604

if gnutls.check_version("3.5.6"):

644

605

gnutls_flags |= gnutls.NO_TICKETS

645

606

if gnutls.has_rawpk:

646

607

gnutls_flags |= gnutls.ENABLE_RAWPK

647

gnutls.init(self, gnutls_flags)

608

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

648

609

del gnutls_flags

649

gnutls.set_default_priority(self)

650

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

651

gnutls.handshake_set_private_extensions(self, True)

610

gnutls.set_default_priority(self._c_object)

611

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

612

gnutls.handshake_set_private_extensions(self._c_object,

613

True)

652

614

self.socket = socket

653

615

if credentials is None:

654

616

credentials = gnutls.Credentials()

655

gnutls.credentials_set(self, credentials.type,

656

credentials)

617

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

618

ctypes.cast(credentials._c_object,

619

ctypes.c_void_p))

657

620

self.credentials = credentials

658

621

659

622

def __del__(self):

660

gnutls.deinit(self)

623

gnutls.deinit(self._c_object)

661

624

662

625

def handshake(self):

663

return gnutls.handshake(self)

626

return gnutls.handshake(self._c_object)

664

627

665

628

def send(self, data):

666

629

data = bytes(data)

667

630

data_len = len(data)

668

631

while data_len > 0:

669

data_len -= gnutls.record_send(self, data[-data_len:],

632

data_len -= gnutls.record_send(self._c_object,

633

data[-data_len:],

670

634

data_len)

671

635

672

636

def bye(self):

673

return gnutls.bye(self, gnutls.SHUT_RDWR)

637

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

674

638

675

639

# Error handling functions

676

640

def _error_code(result):

677

641

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

678

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

679

if result >= gnutls.E_SUCCESS:

642

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

643

if result >= 0:

680

644

return result

681

645

if result == gnutls.E_NO_CERTIFICATE_FOUND:

682

646

raise gnutls.CertificateSecurityError(code=result)

683

647

raise gnutls.Error(code=result)

684

648

685

def _retry_on_error(result, func, arguments,

686

_error_code=_error_code):

649

def _retry_on_error(result, func, arguments):

687

650

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

688

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

689

while result < gnutls.E_SUCCESS:

651

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

652

while result < 0:

690

653

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

691

654

return _error_code(result)

692

655

result = func(*arguments)

697

660

698

661

# Functions

699

662

priority_set_direct = _library.gnutls_priority_set_direct

700

priority_set_direct.argtypes = [ClientSession, ctypes.c_char_p,

663

priority_set_direct.argtypes = [session_t, ctypes.c_char_p,

701

664

ctypes.POINTER(ctypes.c_char_p)]

702

665

priority_set_direct.restype = _error_code

703

666

704

667

init = _library.gnutls_init

705

init.argtypes = [PointerTo(ClientSession), ctypes.c_int]

668

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

706

669

init.restype = _error_code

707

670

708

671

set_default_priority = _library.gnutls_set_default_priority

709

set_default_priority.argtypes = [ClientSession]

672

set_default_priority.argtypes = [session_t]

710

673

set_default_priority.restype = _error_code

711

674

712

675

record_send = _library.gnutls_record_send

713

record_send.argtypes = [ClientSession, ctypes.c_void_p,

676

record_send.argtypes = [session_t, ctypes.c_void_p,

714

677

ctypes.c_size_t]

715

678

record_send.restype = ctypes.c_ssize_t

716

679

record_send.errcheck = _retry_on_error

718

681

certificate_allocate_credentials = (

719

682

_library.gnutls_certificate_allocate_credentials)

720

683

certificate_allocate_credentials.argtypes = [

721

PointerTo(Credentials)]

684

ctypes.POINTER(certificate_credentials_t)]

722

685

certificate_allocate_credentials.restype = _error_code

723

686

724

687

certificate_free_credentials = (

725

688

_library.gnutls_certificate_free_credentials)

726

certificate_free_credentials.argtypes = [Credentials]

689

certificate_free_credentials.argtypes = [

690

certificate_credentials_t]

727

691

certificate_free_credentials.restype = None

728

692

729

693

handshake_set_private_extensions = (

730

694

_library.gnutls_handshake_set_private_extensions)

731

handshake_set_private_extensions.argtypes = [ClientSession,

695

handshake_set_private_extensions.argtypes = [session_t,

732

696

ctypes.c_int]

733

697

handshake_set_private_extensions.restype = None

734

698

735

699

credentials_set = _library.gnutls_credentials_set

736

credentials_set.argtypes = [ClientSession, credentials_type_t,

737

CastToVoidPointer(Credentials)]

700

credentials_set.argtypes = [session_t, credentials_type_t,

701

ctypes.c_void_p]

738

702

credentials_set.restype = _error_code

739

703

740

704

strerror = _library.gnutls_strerror

742

706

strerror.restype = ctypes.c_char_p

743

707

744

708

certificate_type_get = _library.gnutls_certificate_type_get

745

certificate_type_get.argtypes = [ClientSession]

709

certificate_type_get.argtypes = [session_t]

746

710

certificate_type_get.restype = _error_code

747

711

748

712

certificate_get_peers = _library.gnutls_certificate_get_peers

749

certificate_get_peers.argtypes = [ClientSession,

713

certificate_get_peers.argtypes = [session_t,

750

714

ctypes.POINTER(ctypes.c_uint)]

751

715

certificate_get_peers.restype = ctypes.POINTER(datum_t)

752

716

759

723

global_set_log_function.restype = None

760

724

761

725

deinit = _library.gnutls_deinit

762

deinit.argtypes = [ClientSession]

726

deinit.argtypes = [session_t]

763

727

deinit.restype = None

764

728

765

729

handshake = _library.gnutls_handshake

766

handshake.argtypes = [ClientSession]

767

handshake.restype = ctypes.c_int

730

handshake.argtypes = [session_t]

731

handshake.restype = _error_code

768

732

handshake.errcheck = _retry_on_error

769

733

770

734

transport_set_ptr = _library.gnutls_transport_set_ptr

771

transport_set_ptr.argtypes = [ClientSession, transport_ptr_t]

735

transport_set_ptr.argtypes = [session_t, transport_ptr_t]

772

736

transport_set_ptr.restype = None

773

737

774

738

bye = _library.gnutls_bye

775

bye.argtypes = [ClientSession, close_request_t]

776

bye.restype = ctypes.c_int

739

bye.argtypes = [session_t, close_request_t]

740

bye.restype = _error_code

777

741

bye.errcheck = _retry_on_error

778

742

779

743

check_version = _library.gnutls_check_version

780

744

check_version.argtypes = [ctypes.c_char_p]

781

745

check_version.restype = ctypes.c_char_p

782

746

783

_need_version = b"3.3.0"

784

if check_version(_need_version) is None:

785

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

786

.format(_need_version))

787

788

_tls_rawpk_version = b"3.6.6"

789

747

has_rawpk = bool(check_version(_tls_rawpk_version))

790

748

791

749

if has_rawpk:

796

754

797

755

x509_crt_fmt_t = ctypes.c_int

798

756

799

# All the function declarations below are from

800

# gnutls/abstract.h

757

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

801

758

pubkey_init = _library.gnutls_pubkey_init

802

759

pubkey_init.argtypes = [ctypes.POINTER(pubkey_t)]

803

760

pubkey_init.restype = _error_code

817

774

pubkey_deinit.argtypes = [pubkey_t]

818

775

pubkey_deinit.restype = None

819

776

else:

820

# All the function declarations below are from

821

# gnutls/openpgp.h

777

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

822

778

823

779

openpgp_crt_init = _library.gnutls_openpgp_crt_init

824

780

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

830

786

openpgp_crt_fmt_t]

831

787

openpgp_crt_import.restype = _error_code

832

788

833

openpgp_crt_verify_self = \

834

_library.gnutls_openpgp_crt_verify_self

835

openpgp_crt_verify_self.argtypes = [

836

openpgp_crt_t,

837

ctypes.c_uint,

838

ctypes.POINTER(ctypes.c_uint),

839

]

789

openpgp_crt_verify_self = _library.gnutls_openpgp_crt_verify_self

790

openpgp_crt_verify_self.argtypes = [openpgp_crt_t, ctypes.c_uint,

791

ctypes.POINTER(ctypes.c_uint)]

840

792

openpgp_crt_verify_self.restype = _error_code

841

793

842

794

openpgp_crt_deinit = _library.gnutls_openpgp_crt_deinit

851

803

ctypes.c_size_t)]

852

804

openpgp_crt_get_fingerprint.restype = _error_code

853

805

854

if check_version(b"3.6.4"):

806

if check_version("3.6.4"):

855

807

certificate_type_get2 = _library.gnutls_certificate_type_get2

856

certificate_type_get2.argtypes = [ClientSession, ctypes.c_int]

808

certificate_type_get2.argtypes = [session_t, ctypes.c_int]

857

809

certificate_type_get2.restype = _error_code

858

810

859

811

# Remove non-public functions

860

812

del _error_code, _retry_on_error

813

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

814

gnutls = GnuTLS()

861

815

862

816

863

817

def call_pipe(connection, # : multiprocessing.Connection

871

825

connection.close()

872

826

873

827

874

class Client:

828

class Client(object):

875

829

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

876

830

877

831

Attributes:

878

approved: bool(); None if not yet approved/disapproved

832

approved: bool(); 'None' if not yet approved/disapproved

879

833

approval_delay: datetime.timedelta(); Time to wait for approval

880

834

approval_duration: datetime.timedelta(); Duration of one approval

881

checker: multiprocessing.Process(); a running checker process used

882

to see if the client lives. None if no process is

883

running.

835

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

836

to see if the client lives.

837

'None' if no process is running.

884

838

checker_callback_tag: a GLib event source tag, or None

885

839

checker_command: string; External command which is run to check

886

840

if client lives. %() expansions are done at

961

915

# key_id() and fingerprint() functions

962

916

client["key_id"] = (section.get("key_id", "").upper()

963

917

.replace(" ", ""))

964

client["fingerprint"] = (section.get("fingerprint",

965

"").upper()

918

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

966

919

.replace(" ", ""))

967

if not (client["key_id"] or client["fingerprint"]):

968

log.error("Skipping client %s without key_id or"

969

" fingerprint", client_name)

970

del settings[client_name]

971

continue

972

920

if "secret" in section:

973

921

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

974

922

.encode("utf-8"),

1015

963

self.last_enabled = None

1016

964

self.expires = None

1017

965

1018

log.debug("Creating client %r", self.name)

1019

log.debug(" Key ID: %s", self.key_id)

1020

log.debug(" Fingerprint: %s", self.fingerprint)

966

logger.debug("Creating client %r", self.name)

967

logger.debug(" Key ID: %s", self.key_id)

968

logger.debug(" Fingerprint: %s", self.fingerprint)

1021

969

self.created = settings.get("created",

1022

970

datetime.datetime.utcnow())

1023

971

1051

999

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

1052

1000

# Already enabled

1053

1001

return

1002

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

1054

1003

self.enabled = True

1055

1004

self.last_enabled = datetime.datetime.utcnow()

1056

1005

self.init_checker()

1061

1010

if not getattr(self, "enabled", False):

1062

1011

return False

1063

1012

if not quiet:

1064

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

1013

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

1065

1014

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

1066

1015

GLib.source_remove(self.disable_initiator_tag)

1067

1016

self.disable_initiator_tag = None

1079

1028

def __del__(self):

1080

1029

self.disable()

1081

1030

1082

def init_checker(self, randomize_start=False):

1083

# Schedule a new checker to be started a randomly selected

1084

# time (a fraction of 'interval') from now. This spreads out

1085

# the startup of checkers over time when the server is

1086

# started.

1031

def init_checker(self):

1032

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

1033

# and every interval from then on.

1087

1034

if self.checker_initiator_tag is not None:

1088

1035

GLib.source_remove(self.checker_initiator_tag)

1089

interval_milliseconds = int(self.interval.total_seconds()

1090

* 1000)

1091

if randomize_start:

1092

delay_milliseconds = random.randrange(

1093

interval_milliseconds + 1)

1094

else:

1095

delay_milliseconds = interval_milliseconds

1096

1036

self.checker_initiator_tag = GLib.timeout_add(

1097

delay_milliseconds, self.start_checker, randomize_start)

1098

delay = datetime.timedelta(0, 0, 0, delay_milliseconds)

1099

# A checker might take up to an 'interval' of time, so we can

1100

# expire at the soonest one interval after a checker was

1101

# started. Since the initial checker is delayed, the expire

1102

# time might have to be extended.

1103

now = datetime.datetime.utcnow()

1104

self.expires = now + delay + self.interval

1105

# Schedule a disable() at expire time

1037

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

1038

self.start_checker)

1039

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

1106

1040

if self.disable_initiator_tag is not None:

1107

1041

GLib.source_remove(self.disable_initiator_tag)

1108

1042

self.disable_initiator_tag = GLib.timeout_add(

1109

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

1110

self.disable)

1043

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

1044

# Also start a new checker *right now*.

1045

self.start_checker()

1111

1046

1112

1047

def checker_callback(self, source, condition, connection,

1113

1048

command):

1114

1049

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

1050

self.checker_callback_tag = None

1051

self.checker = None

1115

1052

# Read return code from connection (see call_pipe)

1116

1053

returncode = connection.recv()

1117

1054

connection.close()

1118

if self.checker is not None:

1119

self.checker.join()

1120

self.checker_callback_tag = None

1121

self.checker = None

1122

1055

1123

1056

if returncode >= 0:

1124

1057

self.last_checker_status = returncode

1125

1058

self.last_checker_signal = None

1126

1059

if self.last_checker_status == 0:

1127

log.info("Checker for %(name)s succeeded", vars(self))

1060

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

1061

vars(self))

1128

1062

self.checked_ok()

1129

1063

else:

1130

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

1064

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

1131

1065

else:

1132

1066

self.last_checker_status = -1

1133

1067

self.last_checker_signal = -returncode

1134

log.warning("Checker for %(name)s crashed?", vars(self))

1068

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

1069

vars(self))

1135

1070

return False

1136

1071

1137

1072

def checked_ok(self):

1156

1091

def need_approval(self):

1157

1092

self.last_approval_request = datetime.datetime.utcnow()

1158

1093

1159

def start_checker(self, start_was_randomized=False):

1094

def start_checker(self):

1160

1095

"""Start a new checker subprocess if one is not running.

1161

1096

1162

1097

If a checker already exists, leave it running and do

1171

1106

# should be.

1172

1107

1173

1108

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

1174

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

1109

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

1175

1110

self.checker.join()

1176

1111

self.checker = None

1177

1112

# Start a new checker if needed

1178

1113

if self.checker is None:

1179

1114

# Escape attributes for the shell

1180

1115

escaped_attrs = {

1181

attr: shlex.quote(str(getattr(self, attr)))

1116

attr: re.escape(str(getattr(self, attr)))

1182

1117

for attr in self.runtime_expansions}

1183

1118

try:

1184

1119

command = self.checker_command % escaped_attrs

1185

1120

except TypeError as error:

1186

log.error('Could not format string "%s"',

1187

self.checker_command, exc_info=error)

1121

logger.error('Could not format string "%s"',

1122

self.checker_command,

1123

exc_info=error)

1188

1124

return True # Try again later

1189

1125

self.current_checker_command = command

1190

log.info("Starting checker %r for %s", command, self.name)

1126

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

1127

self.name)

1191

1128

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

1192

1129

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

1193

1130

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

1209

1146

kwargs=popen_args)

1210

1147

self.checker.start()

1211

1148

self.checker_callback_tag = GLib.io_add_watch(

1212

GLib.IOChannel.unix_new(pipe[0].fileno()),

1213

GLib.PRIORITY_DEFAULT, GLib.IO_IN,

1149

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

1214

1150

self.checker_callback, pipe[0], command)

1215

if start_was_randomized:

1216

# We were started after a random delay; Schedule a new

1217

# checker to be started an 'interval' from now, and every

1218

# interval from then on.

1219

now = datetime.datetime.utcnow()

1220

self.checker_initiator_tag = GLib.timeout_add(

1221

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

1222

self.start_checker)

1223

self.expires = max(self.expires, now + self.interval)

1224

# Don't start a new checker again after same random delay

1225

return False

1226

1151

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

1227

1152

return True

1228

1153

1233

1158

self.checker_callback_tag = None

1234

1159

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

1235

1160

return

1236

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

1161

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

1237

1162

self.checker.terminate()

1238

1163

self.checker = None

1239

1164

1266

1191

func._dbus_name = func.__name__

1267

1192

if func._dbus_name.endswith("_dbus_property"):

1268

1193

func._dbus_name = func._dbus_name[:-14]

1269

func._dbus_get_args_options = {"byte_arrays": byte_arrays}

1194

func._dbus_get_args_options = {'byte_arrays': byte_arrays}

1270

1195

return func

1271

1196

1272

1197

return decorator

1361

1286

1362

1287

@dbus.service.method(dbus.INTROSPECTABLE_IFACE,

1363

1288

out_signature="s",

1364

path_keyword="object_path",

1365

connection_keyword="connection")

1289

path_keyword='object_path',

1290

connection_keyword='connection')

1366

1291

def Introspect(self, object_path, connection):

1367

1292

"""Overloading of standard D-Bus method.

1368

1293

1417

1342

document.unlink()

1418

1343

except (AttributeError, xml.dom.DOMException,

1419

1344

xml.parsers.expat.ExpatError) as error:

1420

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

1421

exc_info=error)

1345

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

1346

exc_info=error)

1422

1347

return xmlstring

1423

1348

1424

1349

1482

1407

raise ValueError("Byte arrays not supported for non-"

1483

1408

"'ay' signature {!r}"

1484

1409

.format(prop._dbus_signature))

1485

value = dbus.ByteArray(bytes(value))

1410

value = dbus.ByteArray(b''.join(chr(byte)

1411

for byte in value))

1486

1412

prop(value)

1487

1413

1488

1414

@dbus.service.method(dbus.PROPERTIES_IFACE,

1521

1447

1522

1448

@dbus.service.method(dbus.INTROSPECTABLE_IFACE,

1523

1449

out_signature="s",

1524

path_keyword="object_path",

1525

connection_keyword="connection")

1450

path_keyword='object_path',

1451

connection_keyword='connection')

1526

1452

def Introspect(self, object_path, connection):

1527

1453

"""Overloading of standard D-Bus method.

1528

1454

1584

1510

document.unlink()

1585

1511

except (AttributeError, xml.dom.DOMException,

1586

1512

xml.parsers.expat.ExpatError) as error:

1587

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

1588

exc_info=error)

1513

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

1514

exc_info=error)

1589

1515

return xmlstring

1590

1516

1591

1517

1623

1549

1624

1550

@dbus.service.method(dbus.INTROSPECTABLE_IFACE,

1625

1551

out_signature="s",

1626

path_keyword="object_path",

1627

connection_keyword="connection")

1552

path_keyword='object_path',

1553

connection_keyword='connection')

1628

1554

def Introspect(self, object_path, connection):

1629

1555

"""Overloading of standard D-Bus method.

1630

1556

1655

1581

document.unlink()

1656

1582

except (AttributeError, xml.dom.DOMException,

1657

1583

xml.parsers.expat.ExpatError) as error:

1658

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

1659

exc_info=error)

1584

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

1585

exc_info=error)

1660

1586

return xmlstring

1661

1587

1662

1588

2293

2219

del _interface

2294

2220

2295

2221

2296

class ProxyClient:

2222

class ProxyClient(object):

2297

2223

def __init__(self, child_pipe, key_id, fpr, address):

2298

2224

self._pipe = child_pipe

2299

self._pipe.send(("init", key_id, fpr, address))

2225

self._pipe.send(('init', key_id, fpr, address))

2300

2226

if not self._pipe.recv():

2301

2227

raise KeyError(key_id or fpr)

2302

2228

2303

2229

def __getattribute__(self, name):

2304

if name == "_pipe":

2230

if name == '_pipe':

2305

2231

return super(ProxyClient, self).__getattribute__(name)

2306

self._pipe.send(("getattr", name))

2232

self._pipe.send(('getattr', name))

2307

2233

data = self._pipe.recv()

2308

if data[0] == "data":

2234

if data[0] == 'data':

2309

2235

return data[1]

2310

if data[0] == "function":

2236

if data[0] == 'function':

2311

2237

2312

2238

def func(*args, **kwargs):

2313

self._pipe.send(("funcall", name, args, kwargs))

2239

self._pipe.send(('funcall', name, args, kwargs))

2314

2240

return self._pipe.recv()[1]

2315

2241

2316

2242

return func

2317

2243

2318

2244

def __setattr__(self, name, value):

2319

if name == "_pipe":

2245

if name == '_pipe':

2320

2246

return super(ProxyClient, self).__setattr__(name, value)

2321

self._pipe.send(("setattr", name, value))

2247

self._pipe.send(('setattr', name, value))

2322

2248

2323

2249

2324

2250

class ClientHandler(socketserver.BaseRequestHandler, object):

2329

2255

2330

2256

def handle(self):

2331

2257

with contextlib.closing(self.server.child_pipe) as child_pipe:

2332

log.info("TCP connection from: %s",

2333

str(self.client_address))

2334

log.debug("Pipe FD: %d", self.server.child_pipe.fileno())

2258

logger.info("TCP connection from: %s",

2259

str(self.client_address))

2260

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

2261

self.server.child_pipe.fileno())

2335

2262

2336

2263

session = gnutls.ClientSession(self.request)

2337

2264

2338

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

2265

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

2339

2266

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

2340

2267

# "+COMP-NULL", "+CTYPE-OPENPGP",

2341

2268

# "+DHE-DSS"))

2343

2270

priority = self.server.gnutls_priority

2344

2271

if priority is None:

2345

2272

priority = "NORMAL"

2346

gnutls.priority_set_direct(session,

2347

priority.encode("utf-8"), None)

2273

gnutls.priority_set_direct(session._c_object,

2274

priority.encode("utf-8"),

2275

None)

2348

2276

2349

2277

# Start communication using the Mandos protocol

2350

2278

# Get protocol number

2351

2279

line = self.request.makefile().readline()

2352

log.debug("Protocol version: %r", line)

2280

logger.debug("Protocol version: %r", line)

2353

2281

try:

2354

2282

if int(line.strip().split()[0]) > 1:

2355

2283

raise RuntimeError(line)

2356

2284

except (ValueError, IndexError, RuntimeError) as error:

2357

log.error("Unknown protocol version: %s", error)

2285

logger.error("Unknown protocol version: %s", error)

2358

2286

return

2359

2287

2360

2288

# Start GnuTLS connection

2361

2289

try:

2362

2290

session.handshake()

2363

2291

except gnutls.Error as error:

2364

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

2292

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

2365

2293

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

2366

2294

# established. Just abandon the request.

2367

2295

return

2368

log.debug("Handshake succeeded")

2296

logger.debug("Handshake succeeded")

2369

2297

2370

2298

approval_required = False

2371

2299

try:

2372

2300

if gnutls.has_rawpk:

2373

fpr = b""

2301

fpr = ""

2374

2302

try:

2375

2303

key_id = self.key_id(

2376

2304

self.peer_certificate(session))

2377

2305

except (TypeError, gnutls.Error) as error:

2378

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

2306

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

2379

2307

return

2380

log.debug("Key ID: %s",

2381

key_id.decode("utf-8",

2382

errors="replace"))

2308

logger.debug("Key ID: %s", key_id)

2383

2309

2384

2310

else:

2385

key_id = b""

2311

key_id = ""

2386

2312

try:

2387

2313

fpr = self.fingerprint(

2388

2314

self.peer_certificate(session))

2389

2315

except (TypeError, gnutls.Error) as error:

2390

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

2316

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

2391

2317

return

2392

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

2318

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

2393

2319

2394

2320

try:

2395

2321

client = ProxyClient(child_pipe, key_id, fpr,

2404

2330

2405

2331

while True:

2406

2332

if not client.enabled:

2407

log.info("Client %s is disabled", client.name)

2333

logger.info("Client %s is disabled",

2334

client.name)

2408

2335

if self.server.use_dbus:

2409

2336

# Emit D-Bus signal

2410

2337

client.Rejected("Disabled")

2414

2341

# We are approved or approval is disabled

2415

2342

break

2416

2343

elif client.approved is None:

2417

log.info("Client %s needs approval",

2418

client.name)

2344

logger.info("Client %s needs approval",

2345

client.name)

2419

2346

if self.server.use_dbus:

2420

2347

# Emit D-Bus signal

2421

2348

client.NeedApproval(

2422

2349

client.approval_delay.total_seconds()

2423

2350

* 1000, client.approved_by_default)

2424

2351

else:

2425

log.warning("Client %s was not approved",

2426

client.name)

2352

logger.warning("Client %s was not approved",

2353

client.name)

2427

2354

if self.server.use_dbus:

2428

2355

# Emit D-Bus signal

2429

2356

client.Rejected("Denied")

2437

2364

time2 = datetime.datetime.now()

2438

2365

if (time2 - time) >= delay:

2439

2366

if not client.approved_by_default:

2440

log.warning("Client %s timed out while"

2441

" waiting for approval",

2442

client.name)

2367

logger.warning("Client %s timed out while"

2368

" waiting for approval",

2369

client.name)

2443

2370

if self.server.use_dbus:

2444

2371

# Emit D-Bus signal

2445

2372

client.Rejected("Approval timed out")

2452

2379

try:

2453

2380

session.send(client.secret)

2454

2381

except gnutls.Error as error:

2455

log.warning("gnutls send failed", exc_info=error)

2382

logger.warning("gnutls send failed",

2383

exc_info=error)

2456

2384

return

2457

2385

2458

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

2386

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

2459

2387

# bump the timeout using extended_timeout

2460

2388

client.bump_timeout(client.extended_timeout)

2461

2389

if self.server.use_dbus:

2468

2396

try:

2469

2397

session.bye()

2470

2398

except gnutls.Error as error:

2471

log.warning("GnuTLS bye failed", exc_info=error)

2399

logger.warning("GnuTLS bye failed",

2400

exc_info=error)

2472

2401

2473

2402

@staticmethod

2474

2403

def peer_certificate(session):

2475

2404

"Return the peer's certificate as a bytestring"

2476

2405

try:

2477

cert_type = gnutls.certificate_type_get2(

2478

session, gnutls.CTYPE_PEERS)

2406

cert_type = gnutls.certificate_type_get2(session._c_object,

2407

gnutls.CTYPE_PEERS)

2479

2408

except AttributeError:

2480

cert_type = gnutls.certificate_type_get(session)

2409

cert_type = gnutls.certificate_type_get(session._c_object)

2481

2410

if gnutls.has_rawpk:

2482

2411

valid_cert_types = frozenset((gnutls.CRT_RAWPK,))

2483

2412

else:

2484

2413

valid_cert_types = frozenset((gnutls.CRT_OPENPGP,))

2485

2414

# If not a valid certificate type...

2486

2415

if cert_type not in valid_cert_types:

2487

log.info("Cert type %r not in %r", cert_type,

2488

valid_cert_types)

2416

logger.info("Cert type %r not in %r", cert_type,

2417

valid_cert_types)

2489

2418

# ...return invalid data

2490

2419

return b""

2491

2420

list_size = ctypes.c_uint(1)

2492

2421

cert_list = (gnutls.certificate_get_peers

2493

(session, ctypes.byref(list_size)))

2422

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

2494

2423

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

2495

2424

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

2496

2425

if list_size.value == 0:

2518

2447

buf = ctypes.create_string_buffer(32)

2519

2448

buf_len = ctypes.c_size_t(len(buf))

2520

2449

# Get the key ID from the raw public key into the buffer

2521

gnutls.pubkey_get_key_id(

2522

pubkey,

2523

gnutls.KEYID_USE_SHA256,

2524

ctypes.cast(ctypes.byref(buf),

2525

ctypes.POINTER(ctypes.c_ubyte)),

2526

ctypes.byref(buf_len))

2450

gnutls.pubkey_get_key_id(pubkey,

2451

gnutls.KEYID_USE_SHA256,

2452

ctypes.cast(ctypes.byref(buf),

2453

ctypes.POINTER(ctypes.c_ubyte)),

2454

ctypes.byref(buf_len))

2527

2455

# Deinit the certificate

2528

2456

gnutls.pubkey_deinit(pubkey)

2529

2457

2570

2498

return hex_fpr

2571

2499

2572

2500

2573

class MultiprocessingMixIn:

2501

class MultiprocessingMixIn(object):

2574

2502

"""Like socketserver.ThreadingMixIn, but with multiprocessing"""

2575

2503

2576

2504

def sub_process_main(self, request, address):

2588

2516

return proc

2589

2517

2590

2518

2591

class MultiprocessingMixInWithPipe(MultiprocessingMixIn):

2519

class MultiprocessingMixInWithPipe(MultiprocessingMixIn, object):

2592

2520

""" adds a pipe to the MixIn """

2593

2521

2594

2522

def process_request(self, request, client_address):

2609

2537

2610

2538

2611

2539

class IPv6_TCPServer(MultiprocessingMixInWithPipe,

2612

socketserver.TCPServer):

2613

"""IPv6-capable TCP server. Accepts None as address and/or port

2540

socketserver.TCPServer, object):

2541

"""IPv6-capable TCP server. Accepts 'None' as address and/or port

2614

2542

2615

2543

Attributes:

2616

2544

enabled: Boolean; whether this server is activated yet

2667

2595

if SO_BINDTODEVICE is None:

2668

2596

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

2669

2597

# common enough.

2670

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

2598

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

2671

2599

SO_BINDTODEVICE = 25

2672

2600

try:

2673

2601

self.socket.setsockopt(

2675

2603

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

2676

2604

except socket.error as error:

2677

2605

if error.errno == errno.EPERM:

2678

log.error("No permission to bind to interface %s",

2679

self.interface)

2606

logger.error("No permission to bind to"

2607

" interface %s", self.interface)

2680

2608

elif error.errno == errno.ENOPROTOOPT:

2681

log.error("SO_BINDTODEVICE not available; cannot"

2682

" bind to interface %s", self.interface)

2609

logger.error("SO_BINDTODEVICE not available;"

2610

" cannot bind to interface %s",

2611

self.interface)

2683

2612

elif error.errno == errno.ENODEV:

2684

log.error("Interface %s does not exist, cannot"

2685

" bind", self.interface)

2613

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

2614

" cannot bind", self.interface)

2686

2615

else:

2687

2616

raise

2688

2617

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

2689

2618

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

2690

if self.server_address[1]:

2691

self.allow_reuse_address = True

2692

2619

if not self.server_address[0]:

2693

2620

if self.address_family == socket.AF_INET6:

2694

2621

any_address = "::" # in6addr_any

2747

2674

def add_pipe(self, parent_pipe, proc):

2748

2675

# Call "handle_ipc" for both data and EOF events

2749

2676

GLib.io_add_watch(

2750

GLib.IOChannel.unix_new(parent_pipe.fileno()),

2751

GLib.PRIORITY_DEFAULT, GLib.IO_IN | GLib.IO_HUP,

2677

parent_pipe.fileno(),

2678

GLib.IO_IN | GLib.IO_HUP,

2752

2679

functools.partial(self.handle_ipc,

2753

2680

parent_pipe=parent_pipe,

2754

2681

proc=proc))

2767

2694

request = parent_pipe.recv()

2768

2695

command = request[0]

2769

2696

2770

if command == "init":

2697

if command == 'init':

2771

2698

key_id = request[1].decode("ascii")

2772

2699

fpr = request[2].decode("ascii")

2773

2700

address = request[3]

2774

2701

2775

2702

for c in self.clients.values():

2776

if key_id == ("E3B0C44298FC1C149AFBF4C8996FB924"

2777

"27AE41E4649B934CA495991B7852B855"):

2703

if key_id == "E3B0C44298FC1C149AFBF4C8996FB92427AE41E4649B934CA495991B7852B855":

2778

2704

continue

2779

2705

if key_id and c.key_id == key_id:

2780

2706

client = c

2783

2709

client = c

2784

2710

break

2785

2711

else:

2786

log.info("Client not found for key ID: %s, address:"

2787

" %s", key_id or fpr, address)

2712

logger.info("Client not found for key ID: %s, address"

2713

": %s", key_id or fpr, address)

2788

2714

if self.use_dbus:

2789

2715

# Emit D-Bus signal

2790

2716

mandos_dbus_service.ClientNotFound(key_id or fpr,

2793

2719

return False

2794

2720

2795

2721

GLib.io_add_watch(

2796

GLib.IOChannel.unix_new(parent_pipe.fileno()),

2797

GLib.PRIORITY_DEFAULT, GLib.IO_IN | GLib.IO_HUP,

2722

parent_pipe.fileno(),

2723

GLib.IO_IN | GLib.IO_HUP,

2798

2724

functools.partial(self.handle_ipc,

2799

2725

parent_pipe=parent_pipe,

2800

2726

proc=proc,

2803

2729

# remove the old hook in favor of the new above hook on

2804

2730

# same fileno

2805

2731

return False

2806

if command == "funcall":

2732

if command == 'funcall':

2807

2733

funcname = request[1]

2808

2734

args = request[2]

2809

2735

kwargs = request[3]

2810

2736

2811

parent_pipe.send(("data", getattr(client_object,

2737

parent_pipe.send(('data', getattr(client_object,

2812

2738

funcname)(*args,

2813

2739

**kwargs)))

2814

2740

2815

if command == "getattr":

2741

if command == 'getattr':

2816

2742

attrname = request[1]

2817

2743

if isinstance(client_object.__getattribute__(attrname),

2818

collections.abc.Callable):

2819

parent_pipe.send(("function", ))

2744

collections.Callable):

2745

parent_pipe.send(('function', ))

2820

2746

else:

2821

2747

parent_pipe.send((

2822

"data", client_object.__getattribute__(attrname)))

2748

'data', client_object.__getattribute__(attrname)))

2823

2749

2824

if command == "setattr":

2750

if command == 'setattr':

2825

2751

attrname = request[1]

2826

2752

value = request[2]

2827

2753

setattr(client_object, attrname, value)

2832

2758

def rfc3339_duration_to_delta(duration):

2833

2759

"""Parse an RFC 3339 "duration" and return a datetime.timedelta

2834

2760

2835

>>> timedelta = datetime.timedelta

2836

>>> rfc3339_duration_to_delta("P7D") == timedelta(7)

2837

True

2838

>>> rfc3339_duration_to_delta("PT60S") == timedelta(0, 60)

2839

True

2840

>>> rfc3339_duration_to_delta("PT60M") == timedelta(0, 3600)

2841

True

2842

>>> rfc3339_duration_to_delta("PT24H") == timedelta(1)

2843

True

2844

>>> rfc3339_duration_to_delta("P1W") == timedelta(7)

2845

True

2846

>>> rfc3339_duration_to_delta("PT5M30S") == timedelta(0, 330)

2847

True

2848

>>> rfc3339_duration_to_delta("P1DT3M20S") == timedelta(1, 200)

2849

True

2850

>>> del timedelta

2761

>>> rfc3339_duration_to_delta("P7D")

2762

datetime.timedelta(7)

2763

>>> rfc3339_duration_to_delta("PT60S")

2764

datetime.timedelta(0, 60)

2765

>>> rfc3339_duration_to_delta("PT60M")

2766

datetime.timedelta(0, 3600)

2767

>>> rfc3339_duration_to_delta("PT24H")

2768

datetime.timedelta(1)

2769

>>> rfc3339_duration_to_delta("P1W")

2770

datetime.timedelta(7)

2771

>>> rfc3339_duration_to_delta("PT5M30S")

2772

datetime.timedelta(0, 330)

2773

>>> rfc3339_duration_to_delta("P1DT3M20S")

2774

datetime.timedelta(1, 200)

2851

2775

"""

2852

2776

2853

2777

# Parsing an RFC 3339 duration with regular expressions is not

2933

2857

def string_to_delta(interval):

2934

2858

"""Parse a string and return a datetime.timedelta

2935

2859

2936

>>> string_to_delta("7d") == datetime.timedelta(7)

2937

True

2938

>>> string_to_delta("60s") == datetime.timedelta(0, 60)

2939

True

2940

>>> string_to_delta("60m") == datetime.timedelta(0, 3600)

2941

True

2942

>>> string_to_delta("24h") == datetime.timedelta(1)

2943

True

2944

>>> string_to_delta("1w") == datetime.timedelta(7)

2945

True

2946

>>> string_to_delta("5m 30s") == datetime.timedelta(0, 330)

2947

True

2860

>>> string_to_delta('7d')

2861

datetime.timedelta(7)

2862

>>> string_to_delta('60s')

2863

datetime.timedelta(0, 60)

2864

>>> string_to_delta('60m')

2865

datetime.timedelta(0, 3600)

2866

>>> string_to_delta('24h')

2867

datetime.timedelta(1)

2868

>>> string_to_delta('1w')

2869

datetime.timedelta(7)

2870

>>> string_to_delta('5m 30s')

2871

datetime.timedelta(0, 330)

2948

2872

"""

2949

2873

2950

2874

try:

3052

2976

3053

2977

options = parser.parse_args()

3054

2978

2979

if options.check:

2980

import doctest

2981

fail_count, test_count = doctest.testmod()

2982

sys.exit(os.EX_OK if fail_count == 0 else 1)

2983

3055

2984

# Default values for config file for server-global settings

3056

2985

if gnutls.has_rawpk:

3057

2986

priority = ("SECURE128:!CTYPE-X.509:+CTYPE-RAWPK:!RSA"

3077

3006

del priority

3078

3007

3079

3008

# Parse config file for server-global settings

3080

server_config = configparser.ConfigParser(server_defaults)

3009

server_config = configparser.SafeConfigParser(server_defaults)

3081

3010

del server_defaults

3082

3011

server_config.read(os.path.join(options.configdir, "mandos.conf"))

3083

# Convert the ConfigParser object to a dict

3012

# Convert the SafeConfigParser object to a dict

3084

3013

server_settings = server_config.defaults()

3085

3014

# Use the appropriate methods on the non-string config options

3086

3015

for option in ("debug", "use_dbus", "use_ipv6", "restore",

3153

3082

3154

3083

if server_settings["servicename"] != "Mandos":

3155

3084

syslogger.setFormatter(

3156

logging.Formatter("Mandos ({}) [%(process)d]:"

3157

" %(levelname)s: %(message)s".format(

3085

logging.Formatter('Mandos ({}) [%(process)d]:'

3086

' %(levelname)s: %(message)s'.format(

3158

3087

server_settings["servicename"])))

3159

3088

3160

3089

# Parse config file with clients

3161

client_config = configparser.ConfigParser(Client.client_defaults)

3090

client_config = configparser.SafeConfigParser(Client

3091

.client_defaults)

3162

3092

client_config.read(os.path.join(server_settings["configdir"],

3163

3093

"clients.conf"))

3164

3094

3184

3114

try:

3185

3115

pidfile = codecs.open(pidfilename, "w", encoding="utf-8")

3186

3116

except IOError as e:

3187

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

3188

exc_info=e)

3117

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

3118

exc_info=e)

3189

3119

3190

3120

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

3191

3121

("mandos", "mandos"),

3202

3132

try:

3203

3133

os.setgid(gid)

3204

3134

os.setuid(uid)

3205

log.debug("Did setuid/setgid to %s:%s", uid, gid)

3135

if debug:

3136

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

3137

gid))

3206

3138

except OSError as error:

3207

log.warning("Failed to setuid/setgid to %s:%s: %s", uid, gid,

3208

os.strerror(error.errno))

3139

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

3140

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

3209

3141

if error.errno != errno.EPERM:

3210

3142

raise

3211

3143

3218

3150

3219

3151

@gnutls.log_func

3220

3152

def debug_gnutls(level, string):

3221

log.debug("GnuTLS: %s",

3222

string[:-1].decode("utf-8", errors="replace"))

3153

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

3223

3154

3224

3155

gnutls.global_set_log_function(debug_gnutls)

3225

3156

3234

3165

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

3235

3166

daemon()

3236

3167

3237

if gi.version_info < (3, 10, 2):

3238

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

3239

# need to inform GLib that threads will be used.

3240

GLib.threads_init()

3168

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

3169

# to inform GLib that threads will be used.

3170

GLib.threads_init()

3241

3171

3242

3172

global main_loop

3243

3173

# From the Avahi example code

3254

3184

"se.bsnet.fukt.Mandos", bus,

3255

3185

do_not_queue=True)

3256

3186

except dbus.exceptions.DBusException as e:

3257

log.error("Disabling D-Bus:", exc_info=e)

3187

logger.error("Disabling D-Bus:", exc_info=e)

3258

3188

use_dbus = False

3259

3189

server_settings["use_dbus"] = False

3260

3190

tcp_server.use_dbus = False

3319

3249

if isinstance(s, bytes)

3320

3250

else s) for s in

3321

3251

value["client_structure"]]

3322

# .name, .host, and .checker_command

3323

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

3252

# .name & .host

3253

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

3324

3254

if isinstance(value[k], bytes):

3325

3255

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

3326

if "key_id" not in value:

3256

if not value.has_key("key_id"):

3327

3257

value["key_id"] = ""

3328

elif "fingerprint" not in value:

3258

elif not value.has_key("fingerprint"):

3329

3259

value["fingerprint"] = ""

3330

3260

# old_client_settings

3331

3261

# .keys()

3336

3266

for key, value in

3337

3267

bytes_old_client_settings.items()}

3338

3268

del bytes_old_client_settings

3339

# .host and .checker_command

3269

# .host

3340

3270

for value in old_client_settings.values():

3341

for attribute in ("host", "checker_command"):

3342

if isinstance(value[attribute], bytes):

3343

value[attribute] = (value[attribute]

3344

.decode("utf-8"))

3271

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

3272

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

3273

.decode("utf-8"))

3345

3274

os.remove(stored_state_path)

3346

3275

except IOError as e:

3347

3276

if e.errno == errno.ENOENT:

3348

log.warning("Could not load persistent state:"

3349

" %s", os.strerror(e.errno))

3277

logger.warning("Could not load persistent state:"

3278

" {}".format(os.strerror(e.errno)))

3350

3279

else:

3351

log.critical("Could not load persistent state:",

3352

exc_info=e)

3280

logger.critical("Could not load persistent state:",

3281

exc_info=e)

3353

3282

raise

3354

3283

except EOFError as e:

3355

log.warning("Could not load persistent state: EOFError:",

3356

exc_info=e)

3284

logger.warning("Could not load persistent state: "

3285

"EOFError:",

3286

exc_info=e)

3357

3287

3358

3288

with PGPEngine() as pgp:

3359

3289

for client_name, client in clients_data.items():

3386

3316

if client["enabled"]:

3387

3317

if datetime.datetime.utcnow() >= client["expires"]:

3388

3318

if not client["last_checked_ok"]:

3389

log.warning("disabling client %s - Client"

3390

" never performed a successful"

3391

" checker", client_name)

3319

logger.warning(

3320

"disabling client {} - Client never "

3321

"performed a successful checker".format(

3322

client_name))

3392

3323

client["enabled"] = False

3393

3324

elif client["last_checker_status"] != 0:

3394

log.warning("disabling client %s - Client"

3395

" last checker failed with error"

3396

" code %s", client_name,

3397

client["last_checker_status"])

3325

logger.warning(

3326

"disabling client {} - Client last"

3327

" checker failed with error code"

3328

" {}".format(

3329

client_name,

3330

client["last_checker_status"]))

3398

3331

client["enabled"] = False

3399

3332

else:

3400

3333

client["expires"] = (

3401

3334

datetime.datetime.utcnow()

3402

3335

+ client["timeout"])

3403

log.debug("Last checker succeeded, keeping %s"

3404

" enabled", client_name)

3336

logger.debug("Last checker succeeded,"

3337

" keeping {} enabled".format(

3338

client_name))

3405

3339

try:

3406

3340

client["secret"] = pgp.decrypt(

3407

3341

client["encrypted_secret"],

3408

3342

client_settings[client_name]["secret"])

3409

3343

except PGPError:

3410

3344

# If decryption fails, we use secret from new settings

3411

log.debug("Failed to decrypt %s old secret",

3412

client_name)

3345

logger.debug("Failed to decrypt {} old secret".format(

3346

client_name))

3413

3347

client["secret"] = (client_settings[client_name]

3414

3348

["secret"])

3415

3349

3429

3363

server_settings=server_settings)

3430

3364

3431

3365

if not tcp_server.clients:

3432

log.warning("No clients defined")

3366

logger.warning("No clients defined")

3433

3367

3434

3368

if not foreground:

3435

3369

if pidfile is not None:

3438

3372

with pidfile:

3439

3373

print(pid, file=pidfile)

3440

3374

except IOError:

3441

log.error("Could not write to file %r with PID %d",

3442

pidfilename, pid)

3375

logger.error("Could not write to file %r with PID %d",

3376

pidfilename, pid)

3443

3377

del pidfile

3444

3378

del pidfilename

3445

3379

3595

3529

3596

3530

try:

3597

3531

with tempfile.NamedTemporaryFile(

3598

mode="wb",

3532

mode='wb',

3599

3533

suffix=".pickle",

3600

prefix="clients-",

3534

prefix='clients-',

3601

3535

dir=os.path.dirname(stored_state_path),

3602

3536

delete=False) as stored_state:

3603

3537

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

3611

3545

except NameError:

3612

3546

pass

3613

3547

if e.errno in (errno.ENOENT, errno.EACCES, errno.EEXIST):

3614

log.warning("Could not save persistent state: %s",

3615

os.strerror(e.errno))

3548

logger.warning("Could not save persistent state: {}"

3549

.format(os.strerror(e.errno)))

3616

3550

else:

3617

log.warning("Could not save persistent state:",

3618

exc_info=e)

3551

logger.warning("Could not save persistent state:",

3552

exc_info=e)

3619

3553

raise

3620

3554

3621

3555

# Delete all clients, and settings from config

3638

3572

mandos_dbus_service.client_added_signal(client)

3639

3573

# Need to initiate checking of clients

3640

3574

if client.enabled:

3641

client.init_checker(randomize_start=True)

3575

client.init_checker()

3642

3576

3643

3577

tcp_server.enable()

3644

3578

tcp_server.server_activate()

3647

3581

if zeroconf:

3648

3582

service.port = tcp_server.socket.getsockname()[1]

3649

3583

if use_ipv6:

3650

log.info("Now listening on address %r, port %d, flowinfo %d,"

3651

" scope_id %d", *tcp_server.socket.getsockname())

3584

logger.info("Now listening on address %r, port %d,"

3585

" flowinfo %d, scope_id %d",

3586

*tcp_server.socket.getsockname())

3652

3587

else: # IPv4

3653

log.info("Now listening on address %r, port %d",

3654

*tcp_server.socket.getsockname())

3588

logger.info("Now listening on address %r, port %d",

3589

*tcp_server.socket.getsockname())

3655

3590

3656

3591

# service.interface = tcp_server.socket.getsockname()[3]

3657

3592

3661

3596

try:

3662

3597

service.activate()

3663

3598

except dbus.exceptions.DBusException as error:

3664

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

3599

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

3665

3600

cleanup()

3666

3601

sys.exit(1)

3667

3602

# End of Avahi example code

3668

3603

3669

GLib.io_add_watch(

3670

GLib.IOChannel.unix_new(tcp_server.fileno()),

3671

GLib.PRIORITY_DEFAULT, GLib.IO_IN,

3672

lambda *args, **kwargs: (tcp_server.handle_request

3673

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

3604

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

3605

lambda *args, **kwargs:

3606

(tcp_server.handle_request

3607

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

3674

3608

3675

log.debug("Starting main loop")

3609

logger.debug("Starting main loop")

3676

3610

main_loop.run()

3677

3611

except AvahiError as error:

3678

log.critical("Avahi Error", exc_info=error)

3612

logger.critical("Avahi Error", exc_info=error)

3679

3613

cleanup()

3680

3614

sys.exit(1)

3681

3615

except KeyboardInterrupt:

3682

3616

if debug:

3683

3617

print("", file=sys.stderr)

3684

log.debug("Server received KeyboardInterrupt")

3685

log.debug("Server exiting")

3618

logger.debug("Server received KeyboardInterrupt")

3619

logger.debug("Server exiting")

3686

3620

# Must run before the D-Bus bus name gets deregistered

3687

3621

cleanup()

3688

3622

3689

3690

def parse_test_args():

3691

# type: () -> argparse.Namespace

3692

parser = argparse.ArgumentParser(add_help=False)

3693

parser.add_argument("--check", action="store_true")

3694

parser.add_argument("--prefix", )

3695

args, unknown_args = parser.parse_known_args()

3696

if args.check:

3697

# Remove test options from sys.argv

3698

sys.argv[1:] = unknown_args

3699

return args

3700

3701

# Add all tests from doctest strings

3702

def load_tests(loader, tests, none):

3703

import doctest

3704

tests.addTests(doctest.DocTestSuite())

3705

return tests

3706

3707

if __name__ == "__main__":

3708

options = parse_test_args()

3709

try:

3710

if options.check:

3711

extra_test_prefix = options.prefix

3712

if extra_test_prefix is not None:

3713

if not (unittest.main(argv=[""], exit=False)

3714

.result.wasSuccessful()):

3715

sys.exit(1)

3716

class ExtraTestLoader(unittest.TestLoader):

3717

testMethodPrefix = extra_test_prefix

3718

# Call using ./scriptname --test [--verbose]

3719

unittest.main(argv=[""], testLoader=ExtraTestLoader())

3720

else:

3721

unittest.main(argv=[""])

3722

else:

3723

main()

3724

finally:

3725

logging.shutdown()

3726

3727

# Local Variables:

3728

# run-tests:

3729

# (lambda (&optional extra)

3730

# (if (not (funcall run-tests-in-test-buffer default-directory

3731

# extra))

3732

# (funcall show-test-buffer-in-test-window)

3733

# (funcall remove-test-window)

3734

# (if extra (message "Extra tests run successfully!"))))

3735

# run-tests-in-test-buffer:

3736

# (lambda (dir &optional extra)

3737

# (with-current-buffer (get-buffer-create "*Test*")

3738

# (setq buffer-read-only nil

3739

# default-directory dir)

3740

# (erase-buffer)

3741

# (compilation-mode))

3742

# (let ((process-result

3743

# (let ((inhibit-read-only t))

3744

# (process-file-shell-command

3745

# (funcall get-command-line extra) nil "*Test*"))))

3746

# (and (numberp process-result)

3747

# (= process-result 0))))

3748

# get-command-line:

3749

# (lambda (&optional extra)

3750

# (let ((quoted-script

3751

# (shell-quote-argument (funcall get-script-name))))

3752

# (format

3753

# (concat "%s --check" (if extra " --prefix=atest" ""))

3754

# quoted-script)))

3755

# get-script-name:

3756

# (lambda ()

3757

# (if (fboundp 'file-local-name)

3758

# (file-local-name (buffer-file-name))

3759

# (or (file-remote-p (buffer-file-name) 'localname)

3760

# (buffer-file-name))))

3761

# remove-test-window:

3762

# (lambda ()

3763

# (let ((test-window (get-buffer-window "*Test*")))

3764

# (if test-window (delete-window test-window))))

3765

# show-test-buffer-in-test-window:

3766

# (lambda ()

3767

# (when (not (get-buffer-window-list "*Test*"))

3768

# (setq next-error-last-buffer (get-buffer "*Test*"))

3769

# (let* ((side (if (>= (window-width) 146) 'right 'bottom))

3770

# (display-buffer-overriding-action

3771

# `((display-buffer-in-side-window) (side . ,side)

3772

# (window-height . fit-window-to-buffer)

3773

# (window-width . fit-window-to-buffer))))

3774

# (display-buffer "*Test*"))))

3775

# eval:

3776

# (progn

3777

# (let* ((run-extra-tests (lambda () (interactive)

3778

# (funcall run-tests t)))

3779

# (inner-keymap `(keymap (116 . ,run-extra-tests))) ; t

3780

# (outer-keymap `(keymap (3 . ,inner-keymap)))) ; C-c

3781

# (setq minor-mode-overriding-map-alist

3782

# (cons `(run-tests . ,outer-keymap)

3783

# minor-mode-overriding-map-alist)))

3784

# (add-hook 'after-save-hook run-tests 90 t))

3785

# End:

3623

3624

if __name__ == '__main__':

3625

main()