/mandos/trunk : revision 636

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

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#

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# Everything else is

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#

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

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

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from __future__ import (division, absolute_import, print_function,

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unicode_literals)

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from future_builtins import *

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import SocketServer as socketserver

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import socket

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import argparse

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import binascii

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import tempfile

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import itertools

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import collections

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import dbus

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import dbus.service

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import ctypes.util

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import xml.dom.minidom

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import inspect

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import GnuPGInterface

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try:

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SO_BINDTODEVICE = socket.SO_BINDTODEVICE

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except ImportError:

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SO_BINDTODEVICE = None

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version = "1.5.3"

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version = "1.6.2"

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stored_state_file = "clients.pickle"

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logger = logging.getLogger()

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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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self.gnupg = GnuPGInterface.GnuPG()

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

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self.gnupg = GnuPGInterface.GnuPG()

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self.gnupg.options.meta_interactive = False

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self.gnupg.options.homedir = self.tempdir

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self.gnupg.options.extra_args.extend(['--force-mdc',

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'--quiet',

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'--no-use-agent'])

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self.gnupgargs = ['--batch',

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'--home', self.tempdir,

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'--force-mdc',

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'--quiet',

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'--no-use-agent']

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def __enter__(self):

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return self

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def __exit__ (self, exc_type, exc_value, traceback):

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def __exit__(self, exc_type, exc_value, traceback):

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self._cleanup()

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return False

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def password_encode(self, password):

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# Passphrase can not be empty and can not contain newlines or

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# NUL bytes. So we prefix it and hex encode it.

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return b"mandos" + binascii.hexlify(password)

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encoded = b"mandos" + binascii.hexlify(password)

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if len(encoded) > 2048:

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# GnuPG can't handle long passwords, so encode differently

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encoded = (b"mandos" + password.replace(b"\\", b"\\\\")

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.replace(b"\n", b"\\n")

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.replace(b"\0", b"\\x00"))

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return encoded

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def encrypt(self, data, password):

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self.gnupg.passphrase = self.password_encode(password)

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with open(os.devnull, "w") as devnull:

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try:

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proc = self.gnupg.run(['--symmetric'],

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create_fhs=['stdin', 'stdout'],

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attach_fhs={'stderr': devnull})

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with contextlib.closing(proc.handles['stdin']) as f:

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f.write(data)

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with contextlib.closing(proc.handles['stdout']) as f:

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ciphertext = f.read()

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proc.wait()

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except IOError as e:

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raise PGPError(e)

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self.gnupg.passphrase = None

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passphrase = self.password_encode(password)

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with tempfile.NamedTemporaryFile(dir=self.tempdir

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) as passfile:

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passfile.write(passphrase)

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passfile.flush()

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

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'--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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stdout = subprocess.PIPE,

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stderr = subprocess.PIPE)

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ciphertext, err = proc.communicate(input = data)

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if proc.returncode != 0:

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raise PGPError(err)

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return ciphertext

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def decrypt(self, data, password):

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self.gnupg.passphrase = self.password_encode(password)

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with open(os.devnull, "w") as devnull:

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try:

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proc = self.gnupg.run(['--decrypt'],

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create_fhs=['stdin', 'stdout'],

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attach_fhs={'stderr': devnull})

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with contextlib.closing(proc.handles['stdin']) as f:

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f.write(data)

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with contextlib.closing(proc.handles['stdout']) as f:

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decrypted_plaintext = f.read()

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proc.wait()

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except IOError as e:

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raise PGPError(e)

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self.gnupg.passphrase = None

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passphrase = self.password_encode(password)

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with tempfile.NamedTemporaryFile(dir = self.tempdir

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) as passfile:

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passfile.write(passphrase)

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passfile.flush()

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

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'--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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stdout = subprocess.PIPE,

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stderr = subprocess.PIPE)

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decrypted_plaintext, err = proc.communicate(input

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= data)

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if proc.returncode != 0:

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raise PGPError(err)

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return decrypted_plaintext

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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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See <http://www.dns-sd.org/ServiceTypes.html>

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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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domain: string; Domain to publish on, default to .local if empty.

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self.server_state_changed)

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self.server_state_changed(self.server.GetState())

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class AvahiServiceToSyslog(AvahiService):

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def rename(self):

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

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.format(self.name)))

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return ret

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def timedelta_to_milliseconds(td):

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"Convert a datetime.timedelta() to milliseconds"

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return ((td.days * 24 * 60 * 60 * 1000)

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+ (td.seconds * 1000)

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+ (td.microseconds // 1000))

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class Client(object):

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

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runtime_expansions: Allowed attributes for runtime expansion.

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expires: datetime.datetime(); time (UTC) when a client will be

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disabled, or None

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server_settings: The server_settings dict from main()

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"""

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runtime_expansions = ("approval_delay", "approval_duration",

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"created", "enabled", "fingerprint",

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"host", "interval", "last_checked_ok",

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"created", "enabled", "expires",

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"fingerprint", "host", "interval",

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"last_approval_request", "last_checked_ok",

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"last_enabled", "name", "timeout")

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client_defaults = { "timeout": "5m",

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"extended_timeout": "15m",

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"interval": "2m",

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client_defaults = { "timeout": "PT5M",

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"extended_timeout": "PT15M",

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"interval": "PT2M",

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"checker": "fping -q -- %%(host)s",

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"host": "",

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"approval_delay": "0s",

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"approval_duration": "1s",

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"approval_delay": "PT0S",

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"approval_duration": "PT1S",

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"approved_by_default": "True",

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"enabled": "True",

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}

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return settings

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def __init__(self, settings, name = None):

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def __init__(self, settings, name = None, server_settings=None):

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self.name = name

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if server_settings is None:

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server_settings = {}

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self.server_settings = server_settings

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# adding all client settings

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for setting, value in settings.iteritems():

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setattr(self, setting, value)

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

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# Already enabled

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return

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self.send_changedstate()

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

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self.enabled = True

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self.last_enabled = datetime.datetime.utcnow()

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self.init_checker()

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self.send_changedstate()

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def disable(self, quiet=True):

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"""Disable this client."""

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

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return False

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if not quiet:

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self.send_changedstate()

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if not quiet:

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

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

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

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gobject.source_remove(self.disable_initiator_tag)

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self.disable_initiator_tag = None

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self.expires = None

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

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

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gobject.source_remove(self.checker_initiator_tag)

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self.checker_initiator_tag = None

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self.stop_checker()

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self.enabled = False

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if not quiet:

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self.send_changedstate()

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

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return False

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def init_checker(self):

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

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# and every interval from then on.

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if self.checker_initiator_tag is not None:

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gobject.source_remove(self.checker_initiator_tag)

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self.checker_initiator_tag = (gobject.timeout_add

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(self.interval_milliseconds(),

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self.start_checker))

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

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if self.disable_initiator_tag is not None:

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gobject.source_remove(self.disable_initiator_tag)

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self.disable_initiator_tag = (gobject.timeout_add

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(self.timeout_milliseconds(),

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self.disable))

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timeout = self.timeout

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if self.disable_initiator_tag is not None:

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gobject.source_remove(self.disable_initiator_tag)

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self.disable_initiator_tag = None

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

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self.disable_initiator_tag = (gobject.timeout_add

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(timedelta_to_milliseconds

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self.current_checker_command)

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# Start a new checker if needed

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if self.checker is None:

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# Escape attributes for the shell

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escaped_attrs = dict(

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(attr, re.escape(unicode(getattr(self, attr))))

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for attr in

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self.runtime_expansions)

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try:

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# In case checker_command has exactly one % operator

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command = self.checker_command % self.host

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except TypeError:

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# Escape attributes for the shell

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escaped_attrs = dict(

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(attr,

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re.escape(unicode(str(getattr(self, attr, "")),

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errors=

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'replace')))

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for attr in

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self.runtime_expansions)

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try:

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command = self.checker_command % escaped_attrs

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except TypeError as error:

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

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self.checker_command, exc_info=error)

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return True # Try again later

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command = self.checker_command % escaped_attrs

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except TypeError as error:

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

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self.checker_command, exc_info=error)

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return True # Try again later

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self.current_checker_command = command

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try:

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

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

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

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# always replaced by /dev/null.)

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# The exception is when not debugging but nevertheless

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# running in the foreground; use the previously

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# created wnull.

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popen_args = {}

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if (not self.server_settings["debug"]

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and self.server_settings["foreground"]):

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popen_args.update({"stdout": wnull,

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"stderr": wnull })

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self.checker = subprocess.Popen(command,

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close_fds=True,

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shell=True, cwd="/")

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self.checker_callback_tag = (gobject.child_watch_add

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(self.checker.pid,

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self.checker_callback,

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data=command))

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# The checker may have completed before the gobject

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# watch was added. Check for this.

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pid, status = os.waitpid(self.checker.pid, os.WNOHANG)

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if pid:

721

gobject.source_remove(self.checker_callback_tag)

722

self.checker_callback(pid, status, command)

734

shell=True, cwd="/",

735

**popen_args)

723

736

except OSError as error:

724

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logger.error("Failed to start subprocess",

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738

exc_info=error)

739

return True

740

self.checker_callback_tag = (gobject.child_watch_add

741

(self.checker.pid,

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self.checker_callback,

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data=command))

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# The checker may have completed before the gobject

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# watch was added. Check for this.

746

try:

747

pid, status = os.waitpid(self.checker.pid, os.WNOHANG)

748

except OSError as error:

749

if error.errno == errno.ECHILD:

750

# This should never happen

751

logger.error("Child process vanished",

752

exc_info=error)

753

return True

754

raise

755

if pid:

756

gobject.source_remove(self.checker_callback_tag)

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self.checker_callback(pid, status, command)

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

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return True

728

760

1013

1045

return xmlstring

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1015

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1016

def datetime_to_dbus (dt, variant_level=0):

1048

def datetime_to_dbus(dt, variant_level=0):

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1049

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

1018

1050

if dt is None:

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1051

return dbus.String("", variant_level = variant_level)

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1059

interface names according to the "alt_interface_names" mapping.

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1060

Usage:

1029

1061

1030

@alternate_dbus_names({"org.example.Interface":

1031

"net.example.AlternateInterface"})

1062

@alternate_dbus_interfaces({"org.example.Interface":

1063

"net.example.AlternateInterface"})

1032

1064

class SampleDBusObject(dbus.service.Object):

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1065

@dbus.service.method("org.example.Interface")

1034

1066

def SampleDBusMethod():

1065

1097

interface_names.add(alt_interface)

1066

1098

# Is this a D-Bus signal?

1067

1099

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

1068

# Extract the original non-method function by

1069

# black magic

1100

# Extract the original non-method undecorated

1101

# function by black magic

1070

1102

nonmethod_func = (dict(

1071

1103

zip(attribute.func_code.co_freevars,

1072

1104

attribute.__closure__))["func"]

1333

1365

return False

1334

1366

1335

1367

def approve(self, value=True):

1336

self.send_changedstate()

1337

1368

self.approved = value

1338

1369

gobject.timeout_add(timedelta_to_milliseconds

1339

1370

(self.approval_duration),

1340

1371

self._reset_approved)

1372

self.send_changedstate()

1341

1373

1342

1374

## D-Bus methods, signals & properties

1343

1375

_interface = "se.recompile.Mandos.Client"

1527

1559

def Timeout_dbus_property(self, value=None):

1528

1560

if value is None: # get

1529

1561

return dbus.UInt64(self.timeout_milliseconds())

1562

old_timeout = self.timeout

1530

1563

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

1531

# Reschedule timeout

1564

# Reschedule disabling

1532

1565

if self.enabled:

1533

1566

now = datetime.datetime.utcnow()

1534

time_to_die = timedelta_to_milliseconds(

1535

(self.last_checked_ok + self.timeout) - now)

1536

if time_to_die <= 0:

1567

self.expires += self.timeout - old_timeout

1568

if self.expires <= now:

1537

1569

# The timeout has passed

1538

1570

self.disable()

1539

1571

else:

1540

self.expires = (now +

1541

datetime.timedelta(milliseconds =

1542

time_to_die))

1543

1572

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

1544

1573

is None):

1545

1574

return

1546

1575

gobject.source_remove(self.disable_initiator_tag)

1547

self.disable_initiator_tag = (gobject.timeout_add

1548

(time_to_die,

1549

self.disable))

1576

self.disable_initiator_tag = (

1577

gobject.timeout_add(

1578

timedelta_to_milliseconds(self.expires - now),

1579

self.disable))

1550

1580

1551

1581

# ExtendedTimeout - property

1552

1582

@dbus_service_property(_interface, signature="t",

1740

1770

#wait until timeout or approved

1741

1771

time = datetime.datetime.now()

1742

1772

client.changedstate.acquire()

1743

(client.changedstate.wait

1744

(float(client.timedelta_to_milliseconds(delay)

1745

/ 1000)))

1773

client.changedstate.wait(

1774

float(timedelta_to_milliseconds(delay)

1775

/ 1000))

1746

1776

client.changedstate.release()

1747

1777

time2 = datetime.datetime.now()

1748

1778

if (time2 - time) >= delay:

1864

1894

def process_request(self, request, address):

1865

1895

"""Start a new process to process the request."""

1866

1896

proc = multiprocessing.Process(target = self.sub_process_main,

1867

args = (request,

1868

address))

1897

args = (request, address))

1869

1898

proc.start()

1870

1899

return proc

1871

1900

1899

1928

use_ipv6: Boolean; to use IPv6 or not

1900

1929

"""

1901

1930

def __init__(self, server_address, RequestHandlerClass,

1902

interface=None, use_ipv6=True):

1931

interface=None, use_ipv6=True, socketfd=None):

1932

"""If socketfd is set, use that file descriptor instead of

1933

creating a new one with socket.socket().

1934

"""

1903

1935

self.interface = interface

1904

1936

if use_ipv6:

1905

1937

self.address_family = socket.AF_INET6

1938

if socketfd is not None:

1939

# Save the file descriptor

1940

self.socketfd = socketfd

1941

# Save the original socket.socket() function

1942

self.socket_socket = socket.socket

1943

# To implement --socket, we monkey patch socket.socket.

1944

#

1945

# (When socketserver.TCPServer is a new-style class, we

1946

# could make self.socket into a property instead of monkey

1947

# patching socket.socket.)

1948

#

1949

# Create a one-time-only replacement for socket.socket()

1950

@functools.wraps(socket.socket)

1951

def socket_wrapper(*args, **kwargs):

1952

# Restore original function so subsequent calls are

1953

# not affected.

1954

socket.socket = self.socket_socket

1955

del self.socket_socket

1956

# This time only, return a new socket object from the

1957

# saved file descriptor.

1958

return socket.fromfd(self.socketfd, *args, **kwargs)

1959

# Replace socket.socket() function with wrapper

1960

socket.socket = socket_wrapper

1961

# The socketserver.TCPServer.__init__ will call

1962

# socket.socket(), which might be our replacement,

1963

# socket_wrapper(), if socketfd was set.

1906

1964

socketserver.TCPServer.__init__(self, server_address,

1907

1965

RequestHandlerClass)

1966

1908

1967

def server_bind(self):

1909

1968

"""This overrides the normal server_bind() function

1910

1969

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

1918

1977

try:

1919

1978

self.socket.setsockopt(socket.SOL_SOCKET,

1920

1979

SO_BINDTODEVICE,

1921

str(self.interface

1922

+ '\0'))

1980

str(self.interface + '\0'))

1923

1981

except socket.error as error:

1924

if error[0] == errno.EPERM:

1925

logger.error("No permission to"

1926

" bind to interface %s",

1927

self.interface)

1928

elif error[0] == errno.ENOPROTOOPT:

1982

if error.errno == errno.EPERM:

1983

logger.error("No permission to bind to"

1984

" interface %s", self.interface)

1985

elif error.errno == errno.ENOPROTOOPT:

1929

1986

logger.error("SO_BINDTODEVICE not available;"

1930

1987

" cannot bind to interface %s",

1931

1988

self.interface)

1989

elif error.errno == errno.ENODEV:

1990

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

1991

" cannot bind", self.interface)

1932

1992

else:

1933

1993

raise

1934

1994

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

1937

1997

if self.address_family == socket.AF_INET6:

1938

1998

any_address = "::" # in6addr_any

1939

1999

else:

1940

any_address = socket.INADDR_ANY

2000

any_address = "0.0.0.0" # INADDR_ANY

1941

2001

self.server_address = (any_address,

1942

2002

self.server_address[1])

1943

2003

elif not self.server_address[1]:

1964

2024

"""

1965

2025

def __init__(self, server_address, RequestHandlerClass,

1966

2026

interface=None, use_ipv6=True, clients=None,

1967

gnutls_priority=None, use_dbus=True):

2027

gnutls_priority=None, use_dbus=True, socketfd=None):

1968

2028

self.enabled = False

1969

2029

self.clients = clients

1970

2030

if self.clients is None:

1974

2034

IPv6_TCPServer.__init__(self, server_address,

1975

2035

RequestHandlerClass,

1976

2036

interface = interface,

1977

use_ipv6 = use_ipv6)

2037

use_ipv6 = use_ipv6,

2038

socketfd = socketfd)

1978

2039

def server_activate(self):

1979

2040

if self.enabled:

1980

2041

return socketserver.TCPServer.server_activate(self)

2058

2119

return True

2059

2120

2060

2121

2122

def rfc3339_duration_to_delta(duration):

2123

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

2124

2125

>>> rfc3339_duration_to_delta("P7D")

2126

datetime.timedelta(7)

2127

>>> rfc3339_duration_to_delta("PT60S")

2128

datetime.timedelta(0, 60)

2129

>>> rfc3339_duration_to_delta("PT60M")

2130

datetime.timedelta(0, 3600)

2131

>>> rfc3339_duration_to_delta("PT24H")

2132

datetime.timedelta(1)

2133

>>> rfc3339_duration_to_delta("P1W")

2134

datetime.timedelta(7)

2135

>>> rfc3339_duration_to_delta("PT5M30S")

2136

datetime.timedelta(0, 330)

2137

>>> rfc3339_duration_to_delta("P1DT3M20S")

2138

datetime.timedelta(1, 200)

2139

"""

2140

2141

# Parsing an RFC 3339 duration with regular expressions is not

2142

# possible - there would have to be multiple places for the same

2143

# values, like seconds. The current code, while more esoteric, is

2144

# cleaner without depending on a parsing library. If Python had a

2145

# built-in library for parsing we would use it, but we'd like to

2146

# avoid excessive use of external libraries.

2147

2148

# New type for defining tokens, syntax, and semantics all-in-one

2149

Token = collections.namedtuple("Token",

2150

("regexp", # To match token; if

2151

# "value" is not None,

2152

# must have a "group"

2153

# containing digits

2154

"value", # datetime.timedelta or

2155

# None

2156

"followers")) # Tokens valid after

2157

# this token

2158

# RFC 3339 "duration" tokens, syntax, and semantics; taken from

2159

# the "duration" ABNF definition in RFC 3339, Appendix A.

2160

token_end = Token(re.compile(r"$"), None, frozenset())

2161

token_second = Token(re.compile(r"(\d+)S"),

2162

datetime.timedelta(seconds=1),

2163

frozenset((token_end,)))

2164

token_minute = Token(re.compile(r"(\d+)M"),

2165

datetime.timedelta(minutes=1),

2166

frozenset((token_second, token_end)))

2167

token_hour = Token(re.compile(r"(\d+)H"),

2168

datetime.timedelta(hours=1),

2169

frozenset((token_minute, token_end)))

2170

token_time = Token(re.compile(r"T"),

2171

None,

2172

frozenset((token_hour, token_minute,

2173

token_second)))

2174

token_day = Token(re.compile(r"(\d+)D"),

2175

datetime.timedelta(days=1),

2176

frozenset((token_time, token_end)))

2177

token_month = Token(re.compile(r"(\d+)M"),

2178

datetime.timedelta(weeks=4),

2179

frozenset((token_day, token_end)))

2180

token_year = Token(re.compile(r"(\d+)Y"),

2181

datetime.timedelta(weeks=52),

2182

frozenset((token_month, token_end)))

2183

token_week = Token(re.compile(r"(\d+)W"),

2184

datetime.timedelta(weeks=1),

2185

frozenset((token_end,)))

2186

token_duration = Token(re.compile(r"P"), None,

2187

frozenset((token_year, token_month,

2188

token_day, token_time,

2189

token_week))),

2190

# Define starting values

2191

value = datetime.timedelta() # Value so far

2192

found_token = None

2193

followers = frozenset(token_duration,) # Following valid tokens

2194

s = duration # String left to parse

2195

# Loop until end token is found

2196

while found_token is not token_end:

2197

# Search for any currently valid tokens

2198

for token in followers:

2199

match = token.regexp.match(s)

2200

if match is not None:

2201

# Token found

2202

if token.value is not None:

2203

# Value found, parse digits

2204

factor = int(match.group(1), 10)

2205

# Add to value so far

2206

value += factor * token.value

2207

# Strip token from string

2208

s = token.regexp.sub("", s, 1)

2209

# Go to found token

2210

found_token = token

2211

# Set valid next tokens

2212

followers = found_token.followers

2213

break

2214

else:

2215

# No currently valid tokens were found

2216

raise ValueError("Invalid RFC 3339 duration")

2217

# End token found

2218

return value

2219

2220

2061

2221

def string_to_delta(interval):

2062

2222

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

2063

2223

2074

2234

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

2075

2235

datetime.timedelta(0, 330)

2076

2236

"""

2237

2238

try:

2239

return rfc3339_duration_to_delta(interval)

2240

except ValueError:

2241

pass

2242

2077

2243

timevalue = datetime.timedelta(0)

2078

2244

for s in interval.split():

2079

2245

try:

2142

2308

help="Run self-test")

2143

2309

parser.add_argument("--debug", action="store_true",

2144

2310

help="Debug mode; run in foreground and log"

2145

" to terminal")

2311

" to terminal", default=None)

2146

2312

parser.add_argument("--debuglevel", metavar="LEVEL",

2147

2313

help="Debug level for stdout output")

2148

2314

parser.add_argument("--priority", help="GnuTLS"

2155

2321

" files")

2156

2322

parser.add_argument("--no-dbus", action="store_false",

2157

2323

dest="use_dbus", help="Do not provide D-Bus"

2158

" system bus interface")

2324

" system bus interface", default=None)

2159

2325

parser.add_argument("--no-ipv6", action="store_false",

2160

dest="use_ipv6", help="Do not use IPv6")

2326

dest="use_ipv6", help="Do not use IPv6",

2327

default=None)

2161

2328

parser.add_argument("--no-restore", action="store_false",

2162

2329

dest="restore", help="Do not restore stored"

2163

" state")

2330

" state", default=None)

2331

parser.add_argument("--socket", type=int,

2332

help="Specify a file descriptor to a network"

2333

" socket to use instead of creating one")

2164

2334

parser.add_argument("--statedir", metavar="DIR",

2165

2335

help="Directory to save/restore state in")

2336

parser.add_argument("--foreground", action="store_true",

2337

help="Run in foreground", default=None)

2166

2338

2167

2339

options = parser.parse_args()

2168

2340

2177

2349

"port": "",

2178

2350

"debug": "False",

2179

2351

"priority":

2180

"SECURE256:!CTYPE-X.509:+CTYPE-OPENPGP",

2352

"SECURE256:!CTYPE-X.509:+CTYPE-OPENPGP:+SIGN-RSA-SHA224:+SIGN-RSA-RMD160",

2181

2353

"servicename": "Mandos",

2182

2354

"use_dbus": "True",

2183

2355

"use_ipv6": "True",

2184

2356

"debuglevel": "",

2185

2357

"restore": "True",

2186

"statedir": "/var/lib/mandos"

2358

"socket": "",

2359

"statedir": "/var/lib/mandos",

2360

"foreground": "False",

2187

2361

}

2188

2362

2189

2363

# Parse config file for server-global settings

2194

2368

# Convert the SafeConfigParser object to a dict

2195

2369

server_settings = server_config.defaults()

2196

2370

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

2197

for option in ("debug", "use_dbus", "use_ipv6"):

2371

for option in ("debug", "use_dbus", "use_ipv6", "foreground"):

2198

2372

server_settings[option] = server_config.getboolean("DEFAULT",

2199

2373

option)

2200

2374

if server_settings["port"]:

2201

2375

server_settings["port"] = server_config.getint("DEFAULT",

2202

2376

"port")

2377

if server_settings["socket"]:

2378

server_settings["socket"] = server_config.getint("DEFAULT",

2379

"socket")

2380

# Later, stdin will, and stdout and stderr might, be dup'ed

2381

# over with an opened os.devnull. But we don't want this to

2382

# happen with a supplied network socket.

2383

if 0 <= server_settings["socket"] <= 2:

2384

server_settings["socket"] = os.dup(server_settings

2385

["socket"])

2203

2386

del server_config

2204

2387

2205

2388

# Override the settings from the config file with command line

2207

2390

for option in ("interface", "address", "port", "debug",

2208

2391

"priority", "servicename", "configdir",

2209

2392

"use_dbus", "use_ipv6", "debuglevel", "restore",

2210

"statedir"):

2393

"statedir", "socket", "foreground"):

2211

2394

value = getattr(options, option)

2212

2395

if value is not None:

2213

2396

server_settings[option] = value

2216

2399

for option in server_settings.keys():

2217

2400

if type(server_settings[option]) is str:

2218

2401

server_settings[option] = unicode(server_settings[option])

2402

# Force all boolean options to be boolean

2403

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

2404

"foreground"):

2405

server_settings[option] = bool(server_settings[option])

2406

# Debug implies foreground

2407

if server_settings["debug"]:

2408

server_settings["foreground"] = True

2219

2409

# Now we have our good server settings in "server_settings"

2220

2410

2221

2411

##################################################################

2227

2417

use_ipv6 = server_settings["use_ipv6"]

2228

2418

stored_state_path = os.path.join(server_settings["statedir"],

2229

2419

stored_state_file)

2420

foreground = server_settings["foreground"]

2230

2421

2231

2422

if debug:

2232

2423

initlogger(debug, logging.DEBUG)

2261

2452

use_ipv6=use_ipv6,

2262

2453

gnutls_priority=

2263

2454

server_settings["priority"],

2264

use_dbus=use_dbus)

2265

if not debug:

2266

pidfilename = "/var/run/mandos.pid"

2455

use_dbus=use_dbus,

2456

socketfd=(server_settings["socket"]

2457

or None))

2458

if not foreground:

2459

pidfilename = "/run/mandos.pid"

2460

if not os.path.isdir("/run/."):

2461

pidfilename = "/var/run/mandos.pid"

2462

pidfile = None

2267

2463

try:

2268

2464

pidfile = open(pidfilename, "w")

2269

2465

except IOError as e:

2284

2480

os.setgid(gid)

2285

2481

os.setuid(uid)

2286

2482

except OSError as error:

2287

if error[0] != errno.EPERM:

2483

if error.errno != errno.EPERM:

2288

2484

raise error

2289

2485

2290

2486

if debug:

2308

2504

os.close(null)

2309

2505

2310

2506

# Need to fork before connecting to D-Bus

2311

if not debug:

2507

if not foreground:

2312

2508

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

2313

2509

daemon()

2314

2510

2511

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

2512

# need to inform gobject that threads will be used.

2315

2513

gobject.threads_init()

2316

2514

2317

2515

global main_loop

2352

2550

old_client_settings = {}

2353

2551

clients_data = {}

2354

2552

2553

# This is used to redirect stdout and stderr for checker processes

2554

global wnull

2555

wnull = open(os.devnull, "w") # A writable /dev/null

2556

# Only used if server is running in foreground but not in debug

2557

# mode

2558

if debug or not foreground:

2559

wnull.close()

2560

2355

2561

# Get client data and settings from last running state.

2356

2562

if server_settings["restore"]:

2357

2563

try:

2373

2579

2374

2580

with PGPEngine() as pgp:

2375

2581

for client_name, client in clients_data.iteritems():

2582

# Skip removed clients

2583

if client_name not in client_settings:

2584

continue

2585

2376

2586

# Decide which value to use after restoring saved state.

2377

2587

# We have three different values: Old config file,

2378

2588

# new config file, and saved state.

2440

2650

# Create all client objects

2441

2651

for client_name, client in clients_data.iteritems():

2442

2652

tcp_server.clients[client_name] = client_class(

2443

name = client_name, settings = client)

2653

name = client_name, settings = client,

2654

server_settings = server_settings)

2444

2655

2445

2656

if not tcp_server.clients:

2446

2657

logger.warning("No clients defined")

2447

2658

2448

if not debug:

2449

try:

2450

with pidfile:

2451

pid = os.getpid()

2452

pidfile.write(str(pid) + "\n".encode("utf-8"))

2453

del pidfile

2454

except IOError:

2455

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

2456

pidfilename, pid)

2457

except NameError:

2458

# "pidfile" was never created

2459

pass

2659

if not foreground:

2660

if pidfile is not None:

2661

try:

2662

with pidfile:

2663

pid = os.getpid()

2664

pidfile.write(str(pid) + "\n".encode("utf-8"))

2665

except IOError:

2666

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

2667

pidfilename, pid)

2668

del pidfile

2460

2669

del pidfilename

2461

signal.signal(signal.SIGINT, signal.SIG_IGN)

2462

2670

2463

2671

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

2464

2672

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

2532

2740

service.cleanup()

2533

2741

2534

2742

multiprocessing.active_children()

2743

wnull.close()

2535

2744

if not (tcp_server.clients or client_settings):

2536

2745

return

2537

2746

2549

2758

# A list of attributes that can not be pickled

2550

2759

# + secret.

2551

2760

exclude = set(("bus", "changedstate", "secret",

2552

"checker"))

2761

"checker", "server_settings"))

2553

2762

for name, typ in (inspect.getmembers

2554

2763

(dbus.service.Object)):

2555

2764

exclude.add(name)

2564

2773

del client_settings[client.name]["secret"]

2565

2774

2566

2775

try:

2567

tempfd, tempname = tempfile.mkstemp(suffix=".pickle",

2568

prefix="clients-",

2569

dir=os.path.dirname

2570

(stored_state_path))

2571

with os.fdopen(tempfd, "wb") as stored_state:

2776

with (tempfile.NamedTemporaryFile

2777

(mode='wb', suffix=".pickle", prefix='clients-',

2778

dir=os.path.dirname(stored_state_path),

2779

delete=False)) as stored_state:

2572

2780

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

2781

tempname=stored_state.name

2573

2782

os.rename(tempname, stored_state_path)

2574

2783

except (IOError, OSError) as e:

2575

2784

if not debug: