/mandos/trunk : revision 1274

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#!/usr/bin/python

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

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#!/usr/bin/python3 -bI

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

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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.major == 2:

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str = unicode

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if sys.version_info < (3, 2):

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configparser.Configparser = configparser.SafeConfigParser

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version = "1.8.0"

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version = "1.8.16"

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stored_state_file = "clients.pickle"

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logger = logging.getLogger()

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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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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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logger.addHandler(syslogger)

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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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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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logger.addHandler(console)

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logger.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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log.addHandler(console)

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log.setLevel(level)

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class PGPError(Exception):

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pass

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class PGPEngine(object):

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class PGPEngine:

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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 == "gpg":

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

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if self.gpg == b"gpg" or self.gpg.endswith(b"/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(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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class avahi:

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

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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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def string_array_to_txt_array(self, t):

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@staticmethod

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def string_array_to_txt_array(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(object):

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class AvahiService:

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

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self.name)

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

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

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return self.rename(remove=False)

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else:

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

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log.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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logger.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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log.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"""

425

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

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

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454

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if state == avahi.ENTRY_GROUP_ESTABLISHED:

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logger.debug("Zeroconf service established.")

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log.debug("Zeroconf service established.")

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457

elif state == avahi.ENTRY_GROUP_COLLISION:

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

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

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self.rename()

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elif state == avahi.ENTRY_GROUP_FAILURE:

433

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

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str(error))

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log.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"""

450

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

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log.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:

460

logger.error(bad_states[state])

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log.error(bad_states[state])

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489

else:

462

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

490

log.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:

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if (error.get_dbus_name()

469

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

470

logger.info("Local Zeroconf service name"

471

" collision.")

498

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

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return self.rename(remove=False)

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else:

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

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

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self.cleanup()

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os._exit(1)

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else:

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if error is None:

479

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

506

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

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507

else:

481

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

508

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

482

509

483

510

def activate(self):

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

496

523

class AvahiServiceToSyslog(AvahiService):

497

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

498

525

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

499

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

526

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

527

**kwargs)

500

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syslogger.setFormatter(logging.Formatter(

501

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

529

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

502

530

.format(self.name)))

503

531

return ret

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532

505

533

506

534

# Pretend that we have a GnuTLS module

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."""

535

class gnutls:

536

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

510

537

511

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

512

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if library is None:

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540

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

514

541

_library = ctypes.cdll.LoadLibrary(library)

515

542

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))

525

543

526

544

# Unless otherwise indicated, the constants and types below are

527

545

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

544

562

OPENPGP_FMT_RAW = 0 # gnutls/openpgp.h

545

563

546

564

# Types

547

class session_int(ctypes.Structure):

565

class _session_int(ctypes.Structure):

548

566

_fields_ = []

549

session_t = ctypes.POINTER(session_int)

567

session_t = ctypes.POINTER(_session_int)

550

568

551

569

class certificate_credentials_st(ctypes.Structure):

552

570

_fields_ = []

555

573

certificate_type_t = ctypes.c_int

556

574

557

575

class datum_t(ctypes.Structure):

558

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

559

('size', ctypes.c_uint)]

576

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

577

("size", ctypes.c_uint)]

560

578

561

class openpgp_crt_int(ctypes.Structure):

579

class _openpgp_crt_int(ctypes.Structure):

562

580

_fields_ = []

563

openpgp_crt_t = ctypes.POINTER(openpgp_crt_int)

581

openpgp_crt_t = ctypes.POINTER(_openpgp_crt_int)

564

582

openpgp_crt_fmt_t = ctypes.c_int # gnutls/openpgp.h

565

583

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

566

584

credentials_type_t = ctypes.c_int

569

587

570

588

# Exceptions

571

589

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.

576

590

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

577

591

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

578

592

# code is passed, convert it to a string with

579

593

# gnutls.strerror()

580

594

self.code = code

581

595

if message is None and code is not None:

582

message = GnuTLS.strerror(code)

583

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

596

message = gnutls.strerror(code).decode(

597

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

598

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

584

599

message, *args)

585

600

586

601

class CertificateSecurityError(Error):

587

602

pass

588

603

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

589

629

# Classes

590

class Credentials(object):

630

class Credentials(With_from_param):

591

631

def __init__(self):

592

self._c_object = gnutls.certificate_credentials_t()

593

gnutls.certificate_allocate_credentials(

594

ctypes.byref(self._c_object))

632

self._as_parameter_ = gnutls.certificate_credentials_t()

633

gnutls.certificate_allocate_credentials(self)

595

634

self.type = gnutls.CRD_CERTIFICATE

596

635

597

636

def __del__(self):

598

gnutls.certificate_free_credentials(self._c_object)

637

gnutls.certificate_free_credentials(self)

599

638

600

class ClientSession(object):

639

class ClientSession(With_from_param):

601

640

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

602

self._c_object = gnutls.session_t()

641

self._as_parameter_ = gnutls.session_t()

603

642

gnutls_flags = gnutls.CLIENT

604

if gnutls.check_version("3.5.6"):

643

if gnutls.check_version(b"3.5.6"):

605

644

gnutls_flags |= gnutls.NO_TICKETS

606

645

if gnutls.has_rawpk:

607

646

gnutls_flags |= gnutls.ENABLE_RAWPK

608

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

647

gnutls.init(self, gnutls_flags)

609

648

del gnutls_flags

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)

649

gnutls.set_default_priority(self)

650

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

651

gnutls.handshake_set_private_extensions(self, True)

614

652

self.socket = socket

615

653

if credentials is None:

616

654

credentials = gnutls.Credentials()

617

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

618

ctypes.cast(credentials._c_object,

619

ctypes.c_void_p))

655

gnutls.credentials_set(self, credentials.type,

656

credentials)

620

657

self.credentials = credentials

621

658

622

659

def __del__(self):

623

gnutls.deinit(self._c_object)

660

gnutls.deinit(self)

624

661

625

662

def handshake(self):

626

return gnutls.handshake(self._c_object)

663

return gnutls.handshake(self)

627

664

628

665

def send(self, data):

629

666

data = bytes(data)

630

667

data_len = len(data)

631

668

while data_len > 0:

632

data_len -= gnutls.record_send(self._c_object,

633

data[-data_len:],

669

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

634

670

data_len)

635

671

636

672

def bye(self):

637

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

673

return gnutls.bye(self, gnutls.SHUT_RDWR)

638

674

639

675

# Error handling functions

640

676

def _error_code(result):

641

677

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

642

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

643

if result >= 0:

678

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

679

if result >= gnutls.E_SUCCESS:

644

680

return result

645

681

if result == gnutls.E_NO_CERTIFICATE_FOUND:

646

682

raise gnutls.CertificateSecurityError(code=result)

647

683

raise gnutls.Error(code=result)

648

684

649

def _retry_on_error(result, func, arguments):

685

def _retry_on_error(result, func, arguments,

686

_error_code=_error_code):

650

687

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

651

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

652

while result < 0:

688

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

689

while result < gnutls.E_SUCCESS:

653

690

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

654

691

return _error_code(result)

655

692

result = func(*arguments)

660

697

661

698

# Functions

662

699

priority_set_direct = _library.gnutls_priority_set_direct

663

priority_set_direct.argtypes = [session_t, ctypes.c_char_p,

700

priority_set_direct.argtypes = [ClientSession, ctypes.c_char_p,

664

701

ctypes.POINTER(ctypes.c_char_p)]

665

702

priority_set_direct.restype = _error_code

666

703

667

704

init = _library.gnutls_init

668

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

705

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

669

706

init.restype = _error_code

670

707

671

708

set_default_priority = _library.gnutls_set_default_priority

672

set_default_priority.argtypes = [session_t]

709

set_default_priority.argtypes = [ClientSession]

673

710

set_default_priority.restype = _error_code

674

711

675

712

record_send = _library.gnutls_record_send

676

record_send.argtypes = [session_t, ctypes.c_void_p,

713

record_send.argtypes = [ClientSession, ctypes.c_void_p,

677

714

ctypes.c_size_t]

678

715

record_send.restype = ctypes.c_ssize_t

679

716

record_send.errcheck = _retry_on_error

681

718

certificate_allocate_credentials = (

682

719

_library.gnutls_certificate_allocate_credentials)

683

720

certificate_allocate_credentials.argtypes = [

684

ctypes.POINTER(certificate_credentials_t)]

721

PointerTo(Credentials)]

685

722

certificate_allocate_credentials.restype = _error_code

686

723

687

724

certificate_free_credentials = (

688

725

_library.gnutls_certificate_free_credentials)

689

certificate_free_credentials.argtypes = [

690

certificate_credentials_t]

726

certificate_free_credentials.argtypes = [Credentials]

691

727

certificate_free_credentials.restype = None

692

728

693

729

handshake_set_private_extensions = (

694

730

_library.gnutls_handshake_set_private_extensions)

695

handshake_set_private_extensions.argtypes = [session_t,

731

handshake_set_private_extensions.argtypes = [ClientSession,

696

732

ctypes.c_int]

697

733

handshake_set_private_extensions.restype = None

698

734

699

735

credentials_set = _library.gnutls_credentials_set

700

credentials_set.argtypes = [session_t, credentials_type_t,

701

ctypes.c_void_p]

736

credentials_set.argtypes = [ClientSession, credentials_type_t,

737

CastToVoidPointer(Credentials)]

702

738

credentials_set.restype = _error_code

703

739

704

740

strerror = _library.gnutls_strerror

706

742

strerror.restype = ctypes.c_char_p

707

743

708

744

certificate_type_get = _library.gnutls_certificate_type_get

709

certificate_type_get.argtypes = [session_t]

745

certificate_type_get.argtypes = [ClientSession]

710

746

certificate_type_get.restype = _error_code

711

747

712

748

certificate_get_peers = _library.gnutls_certificate_get_peers

713

certificate_get_peers.argtypes = [session_t,

749

certificate_get_peers.argtypes = [ClientSession,

714

750

ctypes.POINTER(ctypes.c_uint)]

715

751

certificate_get_peers.restype = ctypes.POINTER(datum_t)

716

752

723

759

global_set_log_function.restype = None

724

760

725

761

deinit = _library.gnutls_deinit

726

deinit.argtypes = [session_t]

762

deinit.argtypes = [ClientSession]

727

763

deinit.restype = None

728

764

729

765

handshake = _library.gnutls_handshake

730

handshake.argtypes = [session_t]

731

handshake.restype = _error_code

766

handshake.argtypes = [ClientSession]

767

handshake.restype = ctypes.c_int

732

768

handshake.errcheck = _retry_on_error

733

769

734

770

transport_set_ptr = _library.gnutls_transport_set_ptr

735

transport_set_ptr.argtypes = [session_t, transport_ptr_t]

771

transport_set_ptr.argtypes = [ClientSession, transport_ptr_t]

736

772

transport_set_ptr.restype = None

737

773

738

774

bye = _library.gnutls_bye

739

bye.argtypes = [session_t, close_request_t]

740

bye.restype = _error_code

775

bye.argtypes = [ClientSession, close_request_t]

776

bye.restype = ctypes.c_int

741

777

bye.errcheck = _retry_on_error

742

778

743

779

check_version = _library.gnutls_check_version

744

780

check_version.argtypes = [ctypes.c_char_p]

745

781

check_version.restype = ctypes.c_char_p

746

782

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"

747

789

has_rawpk = bool(check_version(_tls_rawpk_version))

748

790

749

791

if has_rawpk:

754

796

755

797

x509_crt_fmt_t = ctypes.c_int

756

798

757

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

799

# All the function declarations below are from

800

# gnutls/abstract.h

758

801

pubkey_init = _library.gnutls_pubkey_init

759

802

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

760

803

pubkey_init.restype = _error_code

774

817

pubkey_deinit.argtypes = [pubkey_t]

775

818

pubkey_deinit.restype = None

776

819

else:

777

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

820

# All the function declarations below are from

821

# gnutls/openpgp.h

778

822

779

823

openpgp_crt_init = _library.gnutls_openpgp_crt_init

780

824

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

786

830

openpgp_crt_fmt_t]

787

831

openpgp_crt_import.restype = _error_code

788

832

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)]

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

]

792

840

openpgp_crt_verify_self.restype = _error_code

793

841

794

842

openpgp_crt_deinit = _library.gnutls_openpgp_crt_deinit

803

851

ctypes.c_size_t)]

804

852

openpgp_crt_get_fingerprint.restype = _error_code

805

853

806

if check_version("3.6.4"):

854

if check_version(b"3.6.4"):

807

855

certificate_type_get2 = _library.gnutls_certificate_type_get2

808

certificate_type_get2.argtypes = [session_t, ctypes.c_int]

856

certificate_type_get2.argtypes = [ClientSession, ctypes.c_int]

809

857

certificate_type_get2.restype = _error_code

810

858

811

859

# Remove non-public functions

812

860

del _error_code, _retry_on_error

813

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

814

gnutls = GnuTLS()

815

861

816

862

817

863

def call_pipe(connection, # : multiprocessing.Connection

825

871

connection.close()

826

872

827

873

828

class Client(object):

874

class Client:

829

875

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

830

876

831

877

Attributes:

832

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

878

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

833

879

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

834

880

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

835

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

836

to see if the client lives.

837

'None' if no process is running.

881

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

882

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

883

running.

838

884

checker_callback_tag: a GLib event source tag, or None

839

885

checker_command: string; External command which is run to check

840

886

if client lives. %() expansions are done at

963

1009

self.last_enabled = None

964

1010

self.expires = None

965

1011

966

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

967

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

968

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

1012

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

1013

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

1014

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

969

1015

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

970

1016

datetime.datetime.utcnow())

971

1017

999

1045

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

1000

1046

# Already enabled

1001

1047

return

1002

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

1003

1048

self.enabled = True

1004

1049

self.last_enabled = datetime.datetime.utcnow()

1005

1050

self.init_checker()

1010

1055

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

1011

1056

return False

1012

1057

if not quiet:

1013

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

1058

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

1014

1059

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

1015

1060

GLib.source_remove(self.disable_initiator_tag)

1016

1061

self.disable_initiator_tag = None

1028

1073

def __del__(self):

1029

1074

self.disable()

1030

1075

1031

def init_checker(self):

1032

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

1033

# and every interval from then on.

1076

def init_checker(self, randomize_start=False):

1077

# Schedule a new checker to be started a randomly selected

1078

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

1079

# the startup of checkers over time when the server is

1080

# started.

1034

1081

if self.checker_initiator_tag is not None:

1035

1082

GLib.source_remove(self.checker_initiator_tag)

1083

interval_milliseconds = int(self.interval.total_seconds()

1084

* 1000)

1085

if randomize_start:

1086

delay_milliseconds = random.randrange(

1087

interval_milliseconds + 1)

1088

else:

1089

delay_milliseconds = interval_milliseconds

1036

1090

self.checker_initiator_tag = GLib.timeout_add(

1037

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

1038

self.start_checker)

1039

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

1091

delay_milliseconds, self.start_checker, randomize_start)

1092

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

1093

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

1094

# expire at the soonest one interval after a checker was

1095

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

1096

# time might have to be extended.

1097

now = datetime.datetime.utcnow()

1098

self.expires = now + delay + self.interval

1099

# Schedule a disable() at expire time

1040

1100

if self.disable_initiator_tag is not None:

1041

1101

GLib.source_remove(self.disable_initiator_tag)

1042

1102

self.disable_initiator_tag = GLib.timeout_add(

1043

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

1044

# Also start a new checker *right now*.

1045

self.start_checker()

1103

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

1104

self.disable)

1046

1105

1047

1106

def checker_callback(self, source, condition, connection,

1048

1107

command):

1049

1108

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

1050

self.checker_callback_tag = None

1051

self.checker = None

1052

1109

# Read return code from connection (see call_pipe)

1053

1110

returncode = connection.recv()

1054

1111

connection.close()

1112

if self.checker is not None:

1113

self.checker.join()

1114

self.checker_callback_tag = None

1115

self.checker = None

1055

1116

1056

1117

if returncode >= 0:

1057

1118

self.last_checker_status = returncode

1058

1119

self.last_checker_signal = None

1059

1120

if self.last_checker_status == 0:

1060

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

1061

vars(self))

1121

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

1062

1122

self.checked_ok()

1063

1123

else:

1064

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

1124

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

1065

1125

else:

1066

1126

self.last_checker_status = -1

1067

1127

self.last_checker_signal = -returncode

1068

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

1069

vars(self))

1128

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

1070

1129

return False

1071

1130

1072

1131

def checked_ok(self):

1091

1150

def need_approval(self):

1092

1151

self.last_approval_request = datetime.datetime.utcnow()

1093

1152

1094

def start_checker(self):

1153

def start_checker(self, start_was_randomized=False):

1095

1154

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

1096

1155

1097

1156

If a checker already exists, leave it running and do

1106

1165

# should be.

1107

1166

1108

1167

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

1109

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

1168

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

1110

1169

self.checker.join()

1111

1170

self.checker = None

1112

1171

# Start a new checker if needed

1113

1172

if self.checker is None:

1114

1173

# Escape attributes for the shell

1115

1174

escaped_attrs = {

1116

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

1175

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

1117

1176

for attr in self.runtime_expansions}

1118

1177

try:

1119

1178

command = self.checker_command % escaped_attrs

1120

1179

except TypeError as error:

1121

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

1122

self.checker_command,

1123

exc_info=error)

1180

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

1181

self.checker_command, exc_info=error)

1124

1182

return True # Try again later

1125

1183

self.current_checker_command = command

1126

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

1127

self.name)

1184

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

1128

1185

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

1129

1186

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

1130

1187

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

1146

1203

kwargs=popen_args)

1147

1204

self.checker.start()

1148

1205

self.checker_callback_tag = GLib.io_add_watch(

1149

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

1206

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

1207

GLib.PRIORITY_DEFAULT, GLib.IO_IN,

1150

1208

self.checker_callback, pipe[0], command)

1209

if start_was_randomized:

1210

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

1211

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

1212

# interval from then on.

1213

now = datetime.datetime.utcnow()

1214

self.checker_initiator_tag = GLib.timeout_add(

1215

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

1216

self.start_checker)

1217

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

1218

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

1219

return False

1151

1220

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

1152

1221

return True

1153

1222

1158

1227

self.checker_callback_tag = None

1159

1228

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

1160

1229

return

1161

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

1230

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

1162

1231

self.checker.terminate()

1163

1232

self.checker = None

1164

1233

1191

1260

func._dbus_name = func.__name__

1192

1261

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

1193

1262

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

1194

func._dbus_get_args_options = {'byte_arrays': byte_arrays}

1263

func._dbus_get_args_options = {"byte_arrays": byte_arrays}

1195

1264

return func

1196

1265

1197

1266

return decorator

1286

1355

1287

1356

@dbus.service.method(dbus.INTROSPECTABLE_IFACE,

1288

1357

out_signature="s",

1289

path_keyword='object_path',

1290

connection_keyword='connection')

1358

path_keyword="object_path",

1359

connection_keyword="connection")

1291

1360

def Introspect(self, object_path, connection):

1292

1361

"""Overloading of standard D-Bus method.

1293

1362

1342

1411

document.unlink()

1343

1412

except (AttributeError, xml.dom.DOMException,

1344

1413

xml.parsers.expat.ExpatError) as error:

1345

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

1346

exc_info=error)

1414

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

1415

exc_info=error)

1347

1416

return xmlstring

1348

1417

1349

1418

1407

1476

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

1408

1477

"'ay' signature {!r}"

1409

1478

.format(prop._dbus_signature))

1410

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

1411

for byte in value))

1479

value = dbus.ByteArray(bytes(value))

1412

1480

prop(value)

1413

1481

1414

1482

@dbus.service.method(dbus.PROPERTIES_IFACE,

1447

1515

1448

1516

@dbus.service.method(dbus.INTROSPECTABLE_IFACE,

1449

1517

out_signature="s",

1450

path_keyword='object_path',

1451

connection_keyword='connection')

1518

path_keyword="object_path",

1519

connection_keyword="connection")

1452

1520

def Introspect(self, object_path, connection):

1453

1521

"""Overloading of standard D-Bus method.

1454

1522

1510

1578

document.unlink()

1511

1579

except (AttributeError, xml.dom.DOMException,

1512

1580

xml.parsers.expat.ExpatError) as error:

1513

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

1514

exc_info=error)

1581

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

1582

exc_info=error)

1515

1583

return xmlstring

1516

1584

1517

1585

1549

1617

1550

1618

@dbus.service.method(dbus.INTROSPECTABLE_IFACE,

1551

1619

out_signature="s",

1552

path_keyword='object_path',

1553

connection_keyword='connection')

1620

path_keyword="object_path",

1621

connection_keyword="connection")

1554

1622

def Introspect(self, object_path, connection):

1555

1623

"""Overloading of standard D-Bus method.

1556

1624

1581

1649

document.unlink()

1582

1650

except (AttributeError, xml.dom.DOMException,

1583

1651

xml.parsers.expat.ExpatError) as error:

1584

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

1585

exc_info=error)

1652

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

1653

exc_info=error)

1586

1654

return xmlstring

1587

1655

1588

1656

2219

2287

del _interface

2220

2288

2221

2289

2222

class ProxyClient(object):

2290

class ProxyClient:

2223

2291

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

2224

2292

self._pipe = child_pipe

2225

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

2293

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

2226

2294

if not self._pipe.recv():

2227

2295

raise KeyError(key_id or fpr)

2228

2296

2229

2297

def __getattribute__(self, name):

2230

if name == '_pipe':

2298

if name == "_pipe":

2231

2299

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

2232

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

2300

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

2233

2301

data = self._pipe.recv()

2234

if data[0] == 'data':

2302

if data[0] == "data":

2235

2303

return data[1]

2236

if data[0] == 'function':

2304

if data[0] == "function":

2237

2305

2238

2306

def func(*args, **kwargs):

2239

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

2307

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

2240

2308

return self._pipe.recv()[1]

2241

2309

2242

2310

return func

2243

2311

2244

2312

def __setattr__(self, name, value):

2245

if name == '_pipe':

2313

if name == "_pipe":

2246

2314

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

2247

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

2315

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

2248

2316

2249

2317

2250

2318

class ClientHandler(socketserver.BaseRequestHandler, object):

2255

2323

2256

2324

def handle(self):

2257

2325

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

2258

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

2259

str(self.client_address))

2260

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

2261

self.server.child_pipe.fileno())

2326

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

2327

str(self.client_address))

2328

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

2262

2329

2263

2330

session = gnutls.ClientSession(self.request)

2264

2331

2265

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

2332

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

2266

2333

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

2267

2334

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

2268

2335

# "+DHE-DSS"))

2270

2337

priority = self.server.gnutls_priority

2271

2338

if priority is None:

2272

2339

priority = "NORMAL"

2273

gnutls.priority_set_direct(session._c_object,

2274

priority.encode("utf-8"),

2275

None)

2340

gnutls.priority_set_direct(session,

2341

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

2276

2342

2277

2343

# Start communication using the Mandos protocol

2278

2344

# Get protocol number

2279

2345

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

2280

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

2346

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

2281

2347

try:

2282

2348

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

2283

2349

raise RuntimeError(line)

2284

2350

except (ValueError, IndexError, RuntimeError) as error:

2285

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

2351

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

2286

2352

return

2287

2353

2288

2354

# Start GnuTLS connection

2289

2355

try:

2290

2356

session.handshake()

2291

2357

except gnutls.Error as error:

2292

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

2358

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

2293

2359

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

2294

2360

# established. Just abandon the request.

2295

2361

return

2296

logger.debug("Handshake succeeded")

2362

log.debug("Handshake succeeded")

2297

2363

2298

2364

approval_required = False

2299

2365

try:

2300

2366

if gnutls.has_rawpk:

2301

fpr = ""

2367

fpr = b""

2302

2368

try:

2303

2369

key_id = self.key_id(

2304

2370

self.peer_certificate(session))

2305

2371

except (TypeError, gnutls.Error) as error:

2306

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

2372

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

2307

2373

return

2308

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

2374

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

2375

key_id.decode("utf-8",

2376

errors="replace"))

2309

2377

2310

2378

else:

2311

key_id = ""

2379

key_id = b""

2312

2380

try:

2313

2381

fpr = self.fingerprint(

2314

2382

self.peer_certificate(session))

2315

2383

except (TypeError, gnutls.Error) as error:

2316

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

2384

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

2317

2385

return

2318

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

2386

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

2319

2387

2320

2388

try:

2321

2389

client = ProxyClient(child_pipe, key_id, fpr,

2330

2398

2331

2399

while True:

2332

2400

if not client.enabled:

2333

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

2334

client.name)

2401

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

2335

2402

if self.server.use_dbus:

2336

2403

# Emit D-Bus signal

2337

2404

client.Rejected("Disabled")

2341

2408

# We are approved or approval is disabled

2342

2409

break

2343

2410

elif client.approved is None:

2344

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

2345

client.name)

2411

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

2412

client.name)

2346

2413

if self.server.use_dbus:

2347

2414

# Emit D-Bus signal

2348

2415

client.NeedApproval(

2349

2416

client.approval_delay.total_seconds()

2350

2417

* 1000, client.approved_by_default)

2351

2418

else:

2352

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

2353

client.name)

2419

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

2420

client.name)

2354

2421

if self.server.use_dbus:

2355

2422

# Emit D-Bus signal

2356

2423

client.Rejected("Denied")

2364

2431

time2 = datetime.datetime.now()

2365

2432

if (time2 - time) >= delay:

2366

2433

if not client.approved_by_default:

2367

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

2368

" waiting for approval",

2369

client.name)

2434

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

2435

" waiting for approval",

2436

client.name)

2370

2437

if self.server.use_dbus:

2371

2438

# Emit D-Bus signal

2372

2439

client.Rejected("Approval timed out")

2379

2446

try:

2380

2447

session.send(client.secret)

2381

2448

except gnutls.Error as error:

2382

logger.warning("gnutls send failed",

2383

exc_info=error)

2449

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

2384

2450

return

2385

2451

2386

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

2452

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

2387

2453

# bump the timeout using extended_timeout

2388

2454

client.bump_timeout(client.extended_timeout)

2389

2455

if self.server.use_dbus:

2396

2462

try:

2397

2463

session.bye()

2398

2464

except gnutls.Error as error:

2399

logger.warning("GnuTLS bye failed",

2400

exc_info=error)

2465

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

2401

2466

2402

2467

@staticmethod

2403

2468

def peer_certificate(session):

2404

2469

"Return the peer's certificate as a bytestring"

2405

2470

try:

2406

cert_type = gnutls.certificate_type_get2(session._c_object,

2407

gnutls.CTYPE_PEERS)

2471

cert_type = gnutls.certificate_type_get2(

2472

session, gnutls.CTYPE_PEERS)

2408

2473

except AttributeError:

2409

cert_type = gnutls.certificate_type_get(session._c_object)

2474

cert_type = gnutls.certificate_type_get(session)

2410

2475

if gnutls.has_rawpk:

2411

2476

valid_cert_types = frozenset((gnutls.CRT_RAWPK,))

2412

2477

else:

2413

2478

valid_cert_types = frozenset((gnutls.CRT_OPENPGP,))

2414

2479

# If not a valid certificate type...

2415

2480

if cert_type not in valid_cert_types:

2416

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

2417

valid_cert_types)

2481

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

2482

valid_cert_types)

2418

2483

# ...return invalid data

2419

2484

return b""

2420

2485

list_size = ctypes.c_uint(1)

2421

2486

cert_list = (gnutls.certificate_get_peers

2422

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

2487

(session, ctypes.byref(list_size)))

2423

2488

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

2424

2489

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

2425

2490

if list_size.value == 0:

2447

2512

buf = ctypes.create_string_buffer(32)

2448

2513

buf_len = ctypes.c_size_t(len(buf))

2449

2514

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

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))

2515

gnutls.pubkey_get_key_id(

2516

pubkey,

2517

gnutls.KEYID_USE_SHA256,

2518

ctypes.cast(ctypes.byref(buf),

2519

ctypes.POINTER(ctypes.c_ubyte)),

2520

ctypes.byref(buf_len))

2455

2521

# Deinit the certificate

2456

2522

gnutls.pubkey_deinit(pubkey)

2457

2523

2498

2564

return hex_fpr

2499

2565

2500

2566

2501

class MultiprocessingMixIn(object):

2567

class MultiprocessingMixIn:

2502

2568

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

2503

2569

2504

2570

def sub_process_main(self, request, address):

2516

2582

return proc

2517

2583

2518

2584

2519

class MultiprocessingMixInWithPipe(MultiprocessingMixIn, object):

2585

class MultiprocessingMixInWithPipe(MultiprocessingMixIn):

2520

2586

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

2521

2587

2522

2588

def process_request(self, request, client_address):

2537

2603

2538

2604

2539

2605

class IPv6_TCPServer(MultiprocessingMixInWithPipe,

2540

socketserver.TCPServer, object):

2541

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

2606

socketserver.TCPServer):

2607

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

2542

2608

2543

2609

Attributes:

2544

2610

enabled: Boolean; whether this server is activated yet

2595

2661

if SO_BINDTODEVICE is None:

2596

2662

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

2597

2663

# common enough.

2598

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

2664

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

2599

2665

SO_BINDTODEVICE = 25

2600

2666

try:

2601

2667

self.socket.setsockopt(

2603

2669

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

2604

2670

except socket.error as error:

2605

2671

if error.errno == errno.EPERM:

2606

logger.error("No permission to bind to"

2607

" interface %s", self.interface)

2672

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

2673

self.interface)

2608

2674

elif error.errno == errno.ENOPROTOOPT:

2609

logger.error("SO_BINDTODEVICE not available;"

2610

" cannot bind to interface %s",

2611

self.interface)

2675

log.error("SO_BINDTODEVICE not available; cannot"

2676

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

2612

2677

elif error.errno == errno.ENODEV:

2613

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

2614

" cannot bind", self.interface)

2678

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

2679

" bind", self.interface)

2615

2680

else:

2616

2681

raise

2617

2682

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

2618

2683

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

2684

if self.server_address[1]:

2685

self.allow_reuse_address = True

2619

2686

if not self.server_address[0]:

2620

2687

if self.address_family == socket.AF_INET6:

2621

2688

any_address = "::" # in6addr_any

2674

2741

def add_pipe(self, parent_pipe, proc):

2675

2742

# Call "handle_ipc" for both data and EOF events

2676

2743

GLib.io_add_watch(

2677

parent_pipe.fileno(),

2678

GLib.IO_IN | GLib.IO_HUP,

2744

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

2745

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

2679

2746

functools.partial(self.handle_ipc,

2680

2747

parent_pipe=parent_pipe,

2681

2748

proc=proc))

2694

2761

request = parent_pipe.recv()

2695

2762

command = request[0]

2696

2763

2697

if command == 'init':

2764

if command == "init":

2698

2765

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

2699

2766

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

2700

2767

address = request[3]

2701

2768

2702

2769

for c in self.clients.values():

2770

if key_id == ("E3B0C44298FC1C149AFBF4C8996FB924"

2771

"27AE41E4649B934CA495991B7852B855"):

2772

continue

2703

2773

if key_id and c.key_id == key_id:

2704

2774

client = c

2705

2775

break

2707

2777

client = c

2708

2778

break

2709

2779

else:

2710

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

2711

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

2780

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

2781

" %s", key_id or fpr, address)

2712

2782

if self.use_dbus:

2713

2783

# Emit D-Bus signal

2714

2784

mandos_dbus_service.ClientNotFound(key_id or fpr,

2717

2787

return False

2718

2788

2719

2789

GLib.io_add_watch(

2720

parent_pipe.fileno(),

2721

GLib.IO_IN | GLib.IO_HUP,

2790

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

2791

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

2722

2792

functools.partial(self.handle_ipc,

2723

2793

parent_pipe=parent_pipe,

2724

2794

proc=proc,

2727

2797

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

2728

2798

# same fileno

2729

2799

return False

2730

if command == 'funcall':

2800

if command == "funcall":

2731

2801

funcname = request[1]

2732

2802

args = request[2]

2733

2803

kwargs = request[3]

2734

2804

2735

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

2805

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

2736

2806

funcname)(*args,

2737

2807

**kwargs)))

2738

2808

2739

if command == 'getattr':

2809

if command == "getattr":

2740

2810

attrname = request[1]

2741

2811

if isinstance(client_object.__getattribute__(attrname),

2742

collections.Callable):

2743

parent_pipe.send(('function', ))

2812

collections.abc.Callable):

2813

parent_pipe.send(("function", ))

2744

2814

else:

2745

2815

parent_pipe.send((

2746

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

2816

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

2747

2817

2748

if command == 'setattr':

2818

if command == "setattr":

2749

2819

attrname = request[1]

2750

2820

value = request[2]

2751

2821

setattr(client_object, attrname, value)

2756

2826

def rfc3339_duration_to_delta(duration):

2757

2827

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

2758

2828

2759

>>> rfc3339_duration_to_delta("P7D")

2760

datetime.timedelta(7)

2761

>>> rfc3339_duration_to_delta("PT60S")

2762

datetime.timedelta(0, 60)

2763

>>> rfc3339_duration_to_delta("PT60M")

2764

datetime.timedelta(0, 3600)

2765

>>> rfc3339_duration_to_delta("PT24H")

2766

datetime.timedelta(1)

2767

>>> rfc3339_duration_to_delta("P1W")

2768

datetime.timedelta(7)

2769

>>> rfc3339_duration_to_delta("PT5M30S")

2770

datetime.timedelta(0, 330)

2771

>>> rfc3339_duration_to_delta("P1DT3M20S")

2772

datetime.timedelta(1, 200)

2829

>>> timedelta = datetime.timedelta

2830

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

2831

True

2832

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

2833

True

2834

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

2835

True

2836

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

2837

True

2838

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

2839

True

2840

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

2841

True

2842

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

2843

True

2844

>>> del timedelta

2773

2845

"""

2774

2846

2775

2847

# Parsing an RFC 3339 duration with regular expressions is not

2855

2927

def string_to_delta(interval):

2856

2928

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

2857

2929

2858

>>> string_to_delta('7d')

2859

datetime.timedelta(7)

2860

>>> string_to_delta('60s')

2861

datetime.timedelta(0, 60)

2862

>>> string_to_delta('60m')

2863

datetime.timedelta(0, 3600)

2864

>>> string_to_delta('24h')

2865

datetime.timedelta(1)

2866

>>> string_to_delta('1w')

2867

datetime.timedelta(7)

2868

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

2869

datetime.timedelta(0, 330)

2930

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

2931

True

2932

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

2933

True

2934

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

2935

True

2936

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

2937

True

2938

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

2939

True

2940

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

2941

True

2870

2942

"""

2871

2943

2872

2944

try:

2974

3046

2975

3047

options = parser.parse_args()

2976

3048

2977

if options.check:

2978

import doctest

2979

fail_count, test_count = doctest.testmod()

2980

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

2981

2982

3049

# Default values for config file for server-global settings

2983

3050

if gnutls.has_rawpk:

2984

3051

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

3004

3071

del priority

3005

3072

3006

3073

# Parse config file for server-global settings

3007

server_config = configparser.SafeConfigParser(server_defaults)

3074

server_config = configparser.ConfigParser(server_defaults)

3008

3075

del server_defaults

3009

3076

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

3010

# Convert the SafeConfigParser object to a dict

3077

# Convert the ConfigParser object to a dict

3011

3078

server_settings = server_config.defaults()

3012

3079

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

3013

3080

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

3080

3147

3081

3148

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

3082

3149

syslogger.setFormatter(

3083

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

3084

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

3150

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

3151

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

3085

3152

server_settings["servicename"])))

3086

3153

3087

3154

# Parse config file with clients

3088

client_config = configparser.SafeConfigParser(Client

3089

.client_defaults)

3155

client_config = configparser.ConfigParser(Client.client_defaults)

3090

3156

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

3091

3157

"clients.conf"))

3092

3158

3112

3178

try:

3113

3179

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

3114

3180

except IOError as e:

3115

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

3116

exc_info=e)

3181

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

3182

exc_info=e)

3117

3183

3118

3184

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

3119

3185

("mandos", "mandos"),

3130

3196

try:

3131

3197

os.setgid(gid)

3132

3198

os.setuid(uid)

3133

if debug:

3134

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

3135

gid))

3199

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

3136

3200

except OSError as error:

3137

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

3138

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

3201

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

3202

os.strerror(error.errno))

3139

3203

if error.errno != errno.EPERM:

3140

3204

raise

3141

3205

3148

3212

3149

3213

@gnutls.log_func

3150

3214

def debug_gnutls(level, string):

3151

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

3215

log.debug("GnuTLS: %s",

3216

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

3152

3217

3153

3218

gnutls.global_set_log_function(debug_gnutls)

3154

3219

3163

3228

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

3164

3229

daemon()

3165

3230

3166

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

3167

# to inform GLib that threads will be used.

3168

GLib.threads_init()

3231

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

3232

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

3233

# need to inform GLib that threads will be used.

3234

GLib.threads_init()

3169

3235

3170

3236

global main_loop

3171

3237

# From the Avahi example code

3182

3248

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

3183

3249

do_not_queue=True)

3184

3250

except dbus.exceptions.DBusException as e:

3185

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

3251

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

3186

3252

use_dbus = False

3187

3253

server_settings["use_dbus"] = False

3188

3254

tcp_server.use_dbus = False

3247

3313

if isinstance(s, bytes)

3248

3314

else s) for s in

3249

3315

value["client_structure"]]

3250

# .name & .host

3251

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

3316

# .name, .host, and .checker_command

3317

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

3252

3318

if isinstance(value[k], bytes):

3253

3319

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

3254

if not value.has_key("key_id"):

3320

if "key_id" not in value:

3255

3321

value["key_id"] = ""

3256

elif not value.has_key("fingerprint"):

3322

elif "fingerprint" not in value:

3257

3323

value["fingerprint"] = ""

3258

3324

# old_client_settings

3259

3325

# .keys()

3264

3330

for key, value in

3265

3331

bytes_old_client_settings.items()}

3266

3332

del bytes_old_client_settings

3267

# .host

3333

# .host and .checker_command

3268

3334

for value in old_client_settings.values():

3269

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

3270

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

3271

.decode("utf-8"))

3335

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

3336

if isinstance(value[attribute], bytes):

3337

value[attribute] = (value[attribute]

3338

.decode("utf-8"))

3272

3339

os.remove(stored_state_path)

3273

3340

except IOError as e:

3274

3341

if e.errno == errno.ENOENT:

3275

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

3276

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

3342

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

3343

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

3277

3344

else:

3278

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

3279

exc_info=e)

3345

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

3346

exc_info=e)

3280

3347

raise

3281

3348

except EOFError as e:

3282

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

3283

"EOFError:",

3284

exc_info=e)

3349

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

3350

exc_info=e)

3285

3351

3286

3352

with PGPEngine() as pgp:

3287

3353

for client_name, client in clients_data.items():

3314

3380

if client["enabled"]:

3315

3381

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

3316

3382

if not client["last_checked_ok"]:

3317

logger.warning(

3318

"disabling client {} - Client never "

3319

"performed a successful checker".format(

3320

client_name))

3383

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

3384

" never performed a successful"

3385

" checker", client_name)

3321

3386

client["enabled"] = False

3322

3387

elif client["last_checker_status"] != 0:

3323

logger.warning(

3324

"disabling client {} - Client last"

3325

" checker failed with error code"

3326

" {}".format(

3327

client_name,

3328

client["last_checker_status"]))

3388

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

3389

" last checker failed with error"

3390

" code %s", client_name,

3391

client["last_checker_status"])

3329

3392

client["enabled"] = False

3330

3393

else:

3331

3394

client["expires"] = (

3332

3395

datetime.datetime.utcnow()

3333

3396

+ client["timeout"])

3334

logger.debug("Last checker succeeded,"

3335

" keeping {} enabled".format(

3336

client_name))

3397

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

3398

" enabled", client_name)

3337

3399

try:

3338

3400

client["secret"] = pgp.decrypt(

3339

3401

client["encrypted_secret"],

3340

3402

client_settings[client_name]["secret"])

3341

3403

except PGPError:

3342

3404

# If decryption fails, we use secret from new settings

3343

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

3344

client_name))

3405

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

3406

client_name)

3345

3407

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

3346

3408

["secret"])

3347

3409

3361

3423

server_settings=server_settings)

3362

3424

3363

3425

if not tcp_server.clients:

3364

logger.warning("No clients defined")

3426

log.warning("No clients defined")

3365

3427

3366

3428

if not foreground:

3367

3429

if pidfile is not None:

3370

3432

with pidfile:

3371

3433

print(pid, file=pidfile)

3372

3434

except IOError:

3373

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

3374

pidfilename, pid)

3435

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

3436

pidfilename, pid)

3375

3437

del pidfile

3376

3438

del pidfilename

3377

3439

3527

3589

3528

3590

try:

3529

3591

with tempfile.NamedTemporaryFile(

3530

mode='wb',

3592

mode="wb",

3531

3593

suffix=".pickle",

3532

prefix='clients-',

3594

prefix="clients-",

3533

3595

dir=os.path.dirname(stored_state_path),

3534

3596

delete=False) as stored_state:

3535

3597

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

3543

3605

except NameError:

3544

3606

pass

3545

3607

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

3546

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

3547

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

3608

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

3609

os.strerror(e.errno))

3548

3610

else:

3549

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

3550

exc_info=e)

3611

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

3612

exc_info=e)

3551

3613

raise

3552

3614

3553

3615

# Delete all clients, and settings from config

3570

3632

mandos_dbus_service.client_added_signal(client)

3571

3633

# Need to initiate checking of clients

3572

3634

if client.enabled:

3573

client.init_checker()

3635

client.init_checker(randomize_start=True)

3574

3636

3575

3637

tcp_server.enable()

3576

3638

tcp_server.server_activate()

3579

3641

if zeroconf:

3580

3642

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

3581

3643

if use_ipv6:

3582

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

3583

" flowinfo %d, scope_id %d",

3584

*tcp_server.socket.getsockname())

3644

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

3645

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

3585

3646

else: # IPv4

3586

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

3587

*tcp_server.socket.getsockname())

3647

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

3648

*tcp_server.socket.getsockname())

3588

3649

3589

3650

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

3590

3651

3594

3655

try:

3595

3656

service.activate()

3596

3657

except dbus.exceptions.DBusException as error:

3597

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

3658

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

3598

3659

cleanup()

3599

3660

sys.exit(1)

3600

3661

# End of Avahi example code

3601

3662

3602

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

3603

lambda *args, **kwargs:

3604

(tcp_server.handle_request

3605

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

3663

GLib.io_add_watch(

3664

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

3665

GLib.PRIORITY_DEFAULT, GLib.IO_IN,

3666

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

3667

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

3606

3668

3607

logger.debug("Starting main loop")

3669

log.debug("Starting main loop")

3608

3670

main_loop.run()

3609

3671

except AvahiError as error:

3610

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

3672

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

3611

3673

cleanup()

3612

3674

sys.exit(1)

3613

3675

except KeyboardInterrupt:

3614

3676

if debug:

3615

3677

print("", file=sys.stderr)

3616

logger.debug("Server received KeyboardInterrupt")

3617

logger.debug("Server exiting")

3678

log.debug("Server received KeyboardInterrupt")

3679

log.debug("Server exiting")

3618

3680

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

3619

3681

cleanup()

3620

3682

3621

3622

if __name__ == '__main__':

3623

main()

3683

3684

def parse_test_args():

3685

# type: () -> argparse.Namespace

3686

parser = argparse.ArgumentParser(add_help=False)

3687

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

3688

parser.add_argument("--prefix", )

3689

args, unknown_args = parser.parse_known_args()

3690

if args.check:

3691

# Remove test options from sys.argv

3692

sys.argv[1:] = unknown_args

3693

return args

3694

3695

# Add all tests from doctest strings

3696

def load_tests(loader, tests, none):

3697

import doctest

3698

tests.addTests(doctest.DocTestSuite())

3699

return tests

3700

3701

if __name__ == "__main__":

3702

options = parse_test_args()

3703

try:

3704

if options.check:

3705

extra_test_prefix = options.prefix

3706

if extra_test_prefix is not None:

3707

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

3708

.result.wasSuccessful()):

3709

sys.exit(1)

3710

class ExtraTestLoader(unittest.TestLoader):

3711

testMethodPrefix = extra_test_prefix

3712

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

3713

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

3714

else:

3715

unittest.main(argv=[""])

3716

else:

3717

main()

3718

finally:

3719

logging.shutdown()

3720

3721

# Local Variables:

3722

# run-tests:

3723

# (lambda (&optional extra)

3724

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

3725

# extra))

3726

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

3727

# (funcall remove-test-window)

3728

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

3729

# run-tests-in-test-buffer:

3730

# (lambda (dir &optional extra)

3731

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

3732

# (setq buffer-read-only nil

3733

# default-directory dir)

3734

# (erase-buffer)

3735

# (compilation-mode))

3736

# (let ((process-result

3737

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

3738

# (process-file-shell-command

3739

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

3740

# (and (numberp process-result)

3741

# (= process-result 0))))

3742

# get-command-line:

3743

# (lambda (&optional extra)

3744

# (let ((quoted-script

3745

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

3746

# (format

3747

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

3748

# quoted-script)))

3749

# get-script-name:

3750

# (lambda ()

3751

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

3752

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

3753

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

3754

# (buffer-file-name))))

3755

# remove-test-window:

3756

# (lambda ()

3757

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

3758

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

3759

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

3760

# (lambda ()

3761

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

3762

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

3763

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

3764

# (display-buffer-overriding-action

3765

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

3766

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

3767

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

3768

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

3769

# eval:

3770

# (progn

3771

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

3772

# (funcall run-tests t)))

3773

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

3774

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

3775

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

3776

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

3777

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

3778

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

3779

# End: