/mandos/trunk : revision 747

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#!/usr/bin/python

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#!/usr/bin/python2.7

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

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#

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

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

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#

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# Everything else is

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#

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

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

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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 = "1.5.5"

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if sys.version_info.major == 2:

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str = unicode

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version = "1.6.9"

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stored_state_file = "clients.pickle"

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logger = logging.getLogger()

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syslogger = (logging.handlers.SysLogHandler

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(facility = logging.handlers.SysLogHandler.LOG_DAEMON,

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address = str("/dev/log")))

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syslogger = None

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try:

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if_nametoindex = (ctypes.cdll.LoadLibrary

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(ctypes.util.find_library("c"))

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.if_nametoindex)

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if_nametoindex = ctypes.cdll.LoadLibrary(

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ctypes.util.find_library("c")).if_nametoindex

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except (OSError, AttributeError):

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def if_nametoindex(interface):

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"Get an interface index the hard way, i.e. using fcntl()"

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SIOCGIFINDEX = 0x8933 # From /usr/include/linux/sockios.h

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with contextlib.closing(socket.socket()) as s:

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ifreq = fcntl.ioctl(s, SIOCGIFINDEX,

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struct.pack(str("16s16x"),

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interface))

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interface_index = struct.unpack(str("I"),

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ifreq[16:20])[0]

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struct.pack(b"16s16x", interface))

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interface_index = struct.unpack("I", ifreq[16:20])[0]

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return interface_index

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

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"""init logger and add loglevel"""

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global syslogger

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syslogger = (logging.handlers.SysLogHandler(

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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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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 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(

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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(['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(

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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(['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 = 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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class AvahiError(Exception):

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

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self.value = value

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super(AvahiError, self).__init__(value, *args, **kwargs)

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def __unicode__(self):

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return unicode(repr(self.value))

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return super(AvahiError, self).__init__(value, *args,

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**kwargs)

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class AvahiServiceError(AvahiError):

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pass

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class AvahiGroupError(AvahiError):

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pass

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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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bus: dbus.SystemBus()

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"""

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def __init__(self, interface = avahi.IF_UNSPEC, name = None,

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servicetype = None, port = None, TXT = None,

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domain = "", host = "", max_renames = 32768,

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protocol = avahi.PROTO_UNSPEC, bus = None):

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def __init__(self,

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interface = avahi.IF_UNSPEC,

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name = None,

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servicetype = None,

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port = None,

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TXT = None,

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domain = "",

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host = "",

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max_renames = 32768,

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protocol = avahi.PROTO_UNSPEC,

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bus = None):

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self.interface = interface

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self.name = name

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self.type = servicetype

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self.bus = bus

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self.entry_group_state_changed_match = None

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def rename(self):

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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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raise AvahiServiceError("Too many renames")

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self.name = unicode(self.server

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.GetAlternativeServiceName(self.name))

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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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self.remove()

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if remove:

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self.remove()

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try:

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self.add()

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except dbus.exceptions.DBusException as error:

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

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self.cleanup()

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os._exit(1)

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self.rename_count += 1

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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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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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self.cleanup()

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os._exit(1)

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def remove(self):

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

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self.rename()

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elif state == avahi.ENTRY_GROUP_FAILURE:

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

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unicode(error))

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raise AvahiGroupError("State changed: {0!s}"

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.format(error))

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

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

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

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

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bad_states = { avahi.SERVER_INVALID:

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"Zeroconf server invalid",

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avahi.SERVER_REGISTERING: None,

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avahi.SERVER_COLLISION:

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"Zeroconf server name collision",

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avahi.SERVER_FAILURE:

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"Zeroconf server failure" }

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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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avahi.SERVER_COLLISION: "Zeroconf server name collision",

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avahi.SERVER_FAILURE: "Zeroconf server failure",

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}

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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:

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follow_name_owner_changes=True),

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avahi.DBUS_INTERFACE_SERVER)

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self.server.connect_to_signal("StateChanged",

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self.server_state_changed)

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self.server_state_changed)

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

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404

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class AvahiServiceToSyslog(AvahiService):

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def rename(self):

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

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

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ret = AvahiService.rename(self)

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syslogger.setFormatter(logging.Formatter

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('Mandos ({0}) [%(process)d]:'

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

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.format(self.name)))

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ret = AvahiService.rename(self, *args, **kwargs)

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syslogger.setFormatter(logging.Formatter(

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

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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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"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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"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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"approved_by_default": "True",

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"enabled": "True",

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}

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def timeout_milliseconds(self):

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"Return the 'timeout' attribute in milliseconds"

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return timedelta_to_milliseconds(self.timeout)

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def extended_timeout_milliseconds(self):

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"Return the 'extended_timeout' attribute in milliseconds"

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return timedelta_to_milliseconds(self.extended_timeout)

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def interval_milliseconds(self):

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"Return the 'interval' attribute in milliseconds"

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return timedelta_to_milliseconds(self.interval)

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def approval_delay_milliseconds(self):

473

return timedelta_to_milliseconds(self.approval_delay)

464

client_defaults = {

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"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": "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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475

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@staticmethod

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def config_parser(config):

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client["enabled"] = config.getboolean(client_name,

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"enabled")

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# Uppercase and remove spaces from fingerprint for later

497

# comparison purposes with return value from the

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# fingerprint() function

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

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.replace(" ", ""))

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if "secret" in section:

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"rb") as secfile:

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client["secret"] = secfile.read()

504

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else:

505

raise TypeError("No secret or secfile for section {0}"

509

raise TypeError("No secret or secfile for section {}"

506

510

.format(section))

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client["timeout"] = string_to_delta(section["timeout"])

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client["extended_timeout"] = string_to_delta(

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523

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return settings

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522

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

526

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

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self.name = name

528

if server_settings is None:

529

server_settings = {}

530

self.server_settings = server_settings

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531

# adding all client settings

525

for setting, value in settings.iteritems():

532

for setting, value in settings.items():

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533

setattr(self, setting, value)

527

534

528

535

if self.enabled:

536

543

self.expires = None

537

544

538

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

539

# Uppercase and remove spaces from fingerprint for later

540

# comparison purposes with return value from the fingerprint()

541

# function

542

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

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547

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

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datetime.datetime.utcnow())

551

555

self.current_checker_command = None

552

556

self.approved = None

553

557

self.approvals_pending = 0

554

self.changedstate = (multiprocessing_manager

555

.Condition(multiprocessing_manager

556

.Lock()))

557

self.client_structure = [attr for attr in

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self.__dict__.iterkeys()

558

self.changedstate = multiprocessing_manager.Condition(

559

multiprocessing_manager.Lock())

560

self.client_structure = [attr

561

for attr in self.__dict__.iterkeys()

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if not attr.startswith("_")]

560

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self.client_structure.append("client_structure")

561

564

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for name, t in inspect.getmembers(type(self),

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lambda obj:

564

isinstance(obj,

565

property)):

565

for name, t in inspect.getmembers(

566

type(self), lambda obj: isinstance(obj, property)):

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567

if not name.startswith("_"):

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self.client_structure.append(name)

568

569

610

611

# 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)

613

self.checker_initiator_tag = (gobject.timeout_add

614

(self.interval_milliseconds(),

615

self.start_checker))

614

self.checker_initiator_tag = gobject.timeout_add(

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

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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

620

(self.timeout_milliseconds(),

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self.disable))

620

self.disable_initiator_tag = gobject.timeout_add(

621

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

622

# Also start a new checker *right now*.

623

self.start_checker()

624

633

vars(self))

634

self.checked_ok()

635

else:

636

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

637

vars(self))

636

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

638

637

else:

639

638

self.last_checker_status = -1

640

639

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

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653

gobject.source_remove(self.disable_initiator_tag)

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self.disable_initiator_tag = None

656

655

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

657

self.disable_initiator_tag = (gobject.timeout_add

658

(timedelta_to_milliseconds

659

(timeout), self.disable))

656

self.disable_initiator_tag = gobject.timeout_add(

657

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

660

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

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659

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def need_approval(self):

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677

# If a checker exists, make sure it is not a zombie

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678

try:

681

679

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

682

except (AttributeError, OSError) as error:

683

if (isinstance(error, OSError)

684

and error.errno != errno.ECHILD):

685

raise error

680

except AttributeError:

681

pass

682

except OSError as error:

683

if error.errno != errno.ECHILD:

684

raise

686

685

else:

687

686

if pid:

688

687

logger.warning("Checker was a zombie")

692

691

# Start a new checker if needed

693

692

if self.checker is None:

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693

# Escape attributes for the shell

695

escaped_attrs = dict(

696

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

697

for attr in

698

self.runtime_expansions)

694

escaped_attrs = {

695

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

696

for attr in self.runtime_expansions }

699

697

try:

700

698

command = self.checker_command % escaped_attrs

701

699

except TypeError as error:

702

700

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

703

self.checker_command, exc_info=error)

704

return True # Try again later

701

self.checker_command,

702

exc_info=error)

703

return True # Try again later

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704

self.current_checker_command = command

706

705

try:

707

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

708

command, self.name)

706

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

707

self.name)

709

708

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

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709

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

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710

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

712

711

# always replaced by /dev/null.)

712

# The exception is when not debugging but nevertheless

713

# running in the foreground; use the previously

714

# created wnull.

715

popen_args = {}

716

if (not self.server_settings["debug"]

717

and self.server_settings["foreground"]):

718

popen_args.update({"stdout": wnull,

719

"stderr": wnull })

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720

self.checker = subprocess.Popen(command,

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721

close_fds=True,

715

shell=True, cwd="/")

722

shell=True,

723

cwd="/",

724

**popen_args)

716

725

except OSError as error:

717

726

logger.error("Failed to start subprocess",

718

727

exc_info=error)

719

self.checker_callback_tag = (gobject.child_watch_add

720

(self.checker.pid,

721

self.checker_callback,

722

data=command))

728

return True

729

self.checker_callback_tag = gobject.child_watch_add(

730

self.checker.pid, self.checker_callback, data=command)

723

731

# The checker may have completed before the gobject

724

732

# watch was added. Check for this.

725

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

733

try:

734

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

735

except OSError as error:

736

if error.errno == errno.ECHILD:

737

# This should never happen

738

logger.error("Child process vanished",

739

exc_info=error)

740

return True

741

raise

726

742

if pid:

727

743

gobject.source_remove(self.checker_callback_tag)

728

744

self.checker_callback(pid, status, command)

748

764

self.checker = None

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765

750

766

751

def dbus_service_property(dbus_interface, signature="v",

752

access="readwrite", byte_arrays=False):

767

def dbus_service_property(dbus_interface,

768

signature="v",

769

access="readwrite",

770

byte_arrays=False):

753

771

"""Decorators for marking methods of a DBusObjectWithProperties to

754

772

become properties on the D-Bus.

755

773

764

782

# "Set" method, so we fail early here:

765

783

if byte_arrays and signature != "ay":

766

784

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

767

" signature {0!r}".format(signature))

785

" signature {!r}".format(signature))

786

768

787

def decorator(func):

769

788

func._dbus_is_property = True

770

789

func._dbus_interface = dbus_interface

775

794

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

776

795

func._dbus_get_args_options = {'byte_arrays': byte_arrays }

777

796

return func

797

778

798

return decorator

779

799

780

800

789

809

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

790

810

"false"}

791

811

"""

812

792

813

def decorator(func):

793

814

func._dbus_is_interface = True

794

815

func._dbus_interface = dbus_interface

795

816

func._dbus_name = dbus_interface

796

817

return func

818

797

819

return decorator

798

820

799

821

801

823

"""Decorator to annotate D-Bus methods, signals or properties

802

824

Usage:

803

825

826

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

827

"org.freedesktop.DBus.Property."

828

"EmitsChangedSignal": "false"})

804

829

@dbus_service_property("org.example.Interface", signature="b",

805

830

access="r")

806

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

807

"org.freedesktop.DBus.Property."

808

"EmitsChangedSignal": "false"})

809

831

def Property_dbus_property(self):

810

832

return dbus.Boolean(False)

811

833

"""

834

812

835

def decorator(func):

813

836

func._dbus_annotations = annotations

814

837

return func

838

815

839

return decorator

816

840

817

841

818

842

class DBusPropertyException(dbus.exceptions.DBusException):

819

843

"""A base class for D-Bus property-related exceptions

820

844

"""

821

def __unicode__(self):

822

return unicode(str(self))

845

pass

823

846

824

847

825

848

class DBusPropertyAccessException(DBusPropertyException):

849

872

If called like _is_dbus_thing("method") it returns a function

850

873

suitable for use as predicate to inspect.getmembers().

851

874

"""

852

return lambda obj: getattr(obj, "_dbus_is_{0}".format(thing),

875

return lambda obj: getattr(obj, "_dbus_is_{}".format(thing),

853

876

False)

854

877

855

878

def _get_all_dbus_things(self, thing):

856

879

"""Returns a generator of (name, attribute) pairs

857

880

"""

858

return ((getattr(athing.__get__(self), "_dbus_name",

859

name),

881

return ((getattr(athing.__get__(self), "_dbus_name", name),

860

882

athing.__get__(self))

861

883

for cls in self.__class__.__mro__

862

884

for name, athing in

863

inspect.getmembers(cls,

864

self._is_dbus_thing(thing)))

885

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

865

886

866

887

def _get_dbus_property(self, interface_name, property_name):

867

888

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

868

889

property with the specified name and interface.

869

890

"""

870

for cls in self.__class__.__mro__:

871

for name, value in (inspect.getmembers

872

(cls,

873

self._is_dbus_thing("property"))):

891

for cls in self.__class__.__mro__:

892

for name, value in inspect.getmembers(

893

cls, self._is_dbus_thing("property")):

874

894

if (value._dbus_name == property_name

875

895

and value._dbus_interface == interface_name):

876

896

return value.__get__(self)

877

897

878

898

# No such property

879

raise DBusPropertyNotFound(self.dbus_object_path + ":"

880

+ interface_name + "."

881

+ property_name)

899

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

900

self.dbus_object_path, interface_name, property_name))

882

901

883

@dbus.service.method(dbus.PROPERTIES_IFACE, in_signature="ss",

902

@dbus.service.method(dbus.PROPERTIES_IFACE,

903

in_signature="ss",

884

904

out_signature="v")

885

905

def Get(self, interface_name, property_name):

886

906

"""Standard D-Bus property Get() method, see D-Bus standard.

904

924

# The byte_arrays option is not supported yet on

905

925

# signatures other than "ay".

906

926

if prop._dbus_signature != "ay":

907

raise ValueError

927

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

928

"'ay' signature {!r}"

929

.format(prop._dbus_signature))

908

930

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

909

931

for byte in value))

910

932

prop(value)

911

933

912

@dbus.service.method(dbus.PROPERTIES_IFACE, in_signature="s",

934

@dbus.service.method(dbus.PROPERTIES_IFACE,

935

in_signature="s",

913

936

out_signature="a{sv}")

914

937

def GetAll(self, interface_name):

915

938

"""Standard D-Bus property GetAll() method, see D-Bus

930

953

if not hasattr(value, "variant_level"):

931

954

properties[name] = value

932

955

continue

933

properties[name] = type(value)(value, variant_level=

934

value.variant_level+1)

956

properties[name] = type(value)(

957

value, variant_level = value.variant_level + 1)

935

958

return dbus.Dictionary(properties, signature="sv")

936

959

960

@dbus.service.signal(dbus.PROPERTIES_IFACE, signature="sa{sv}as")

961

def PropertiesChanged(self, interface_name, changed_properties,

962

invalidated_properties):

963

"""Standard D-Bus PropertiesChanged() signal, see D-Bus

964

standard.

965

"""

966

pass

967

937

968

@dbus.service.method(dbus.INTROSPECTABLE_IFACE,

938

969

out_signature="s",

939

970

path_keyword='object_path',

947

978

connection)

948

979

try:

949

980

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

981

950

982

def make_tag(document, name, prop):

951

983

e = document.createElement("property")

952

984

e.setAttribute("name", name)

953

985

e.setAttribute("type", prop._dbus_signature)

954

986

e.setAttribute("access", prop._dbus_access)

955

987

return e

988

956

989

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

957

990

# Add property tags

958

991

for tag in (make_tag(document, name, prop)

970

1003

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

971

1004

and prop._dbus_interface

972

1005

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

973

annots.update(getattr

974

(prop,

975

"_dbus_annotations",

976

{}))

977

for name, value in annots.iteritems():

1006

annots.update(getattr(

1007

prop, "_dbus_annotations", {}))

1008

for name, value in annots.items():

978

1009

ann_tag = document.createElement(

979

1010

"annotation")

980

1011

ann_tag.setAttribute("name", name)

983

1014

# Add interface annotation tags

984

1015

for annotation, value in dict(

985

1016

itertools.chain.from_iterable(

986

annotations().iteritems()

987

for name, annotations in

988

self._get_all_dbus_things("interface")

1017

annotations().items()

1018

for name, annotations

1019

in self._get_all_dbus_things("interface")

989

1020

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

990

)).iteritems():

1021

)).items():

991

1022

ann_tag = document.createElement("annotation")

992

1023

ann_tag.setAttribute("name", annotation)

993

1024

ann_tag.setAttribute("value", value)

1020

1051

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

1021

1052

if dt is None:

1022

1053

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

1023

return dbus.String(dt.isoformat(),

1024

variant_level=variant_level)

1054

return dbus.String(dt.isoformat(), variant_level=variant_level)

1025

1055

1026

1056

1027

1057

def alternate_dbus_interfaces(alt_interface_names, deprecate=True):

1047

1077

(from DBusObjectWithProperties) and interfaces (from the

1048

1078

dbus_interface_annotations decorator).

1049

1079

"""

1080

1050

1081

def wrapper(cls):

1051

1082

for orig_interface_name, alt_interface_name in (

1052

alt_interface_names.iteritems()):

1083

alt_interface_names.items()):

1053

1084

attr = {}

1054

1085

interface_names = set()

1055

1086

# Go though all attributes of the class

1057

1088

# Ignore non-D-Bus attributes, and D-Bus attributes

1058

1089

# with the wrong interface name

1059

1090

if (not hasattr(attribute, "_dbus_interface")

1060

or not attribute._dbus_interface

1061

.startswith(orig_interface_name)):

1091

or not attribute._dbus_interface.startswith(

1092

orig_interface_name)):

1062

1093

continue

1063

1094

# Create an alternate D-Bus interface name based on

1064

1095

# the current name

1065

alt_interface = (attribute._dbus_interface

1066

.replace(orig_interface_name,

1067

alt_interface_name))

1096

alt_interface = attribute._dbus_interface.replace(

1097

orig_interface_name, alt_interface_name)

1068

1098

interface_names.add(alt_interface)

1069

1099

# Is this a D-Bus signal?

1070

1100

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

1071

# Extract the original non-method function by

1072

# black magic

1101

# Extract the original non-method undecorated

1102

# function by black magic

1073

1103

nonmethod_func = (dict(

1074

zip(attribute.func_code.co_freevars,

1075

attribute.__closure__))["func"]

1076

.cell_contents)

1104

zip(attribute.func_code.co_freevars,

1105

attribute.__closure__))

1106

["func"].cell_contents)

1077

1107

# Create a new, but exactly alike, function

1078

1108

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

1079

1109

# with the alternate D-Bus interface name

1080

new_function = (dbus.service.signal

1081

(alt_interface,

1082

attribute._dbus_signature)

1110

new_function = (dbus.service.signal(

1111

alt_interface, attribute._dbus_signature)

1083

1112

(types.FunctionType(

1084

nonmethod_func.func_code,

1085

nonmethod_func.func_globals,

1086

nonmethod_func.func_name,

1087

nonmethod_func.func_defaults,

1088

nonmethod_func.func_closure)))

1113

nonmethod_func.func_code,

1114

nonmethod_func.func_globals,

1115

nonmethod_func.func_name,

1116

nonmethod_func.func_defaults,

1117

nonmethod_func.func_closure)))

1089

1118

# Copy annotations, if any

1090

1119

try:

1091

new_function._dbus_annotations = (

1092

dict(attribute._dbus_annotations))

1120

new_function._dbus_annotations = dict(

1121

attribute._dbus_annotations)

1093

1122

except AttributeError:

1094

1123

pass

1095

1124

# Define a creator of a function to call both the

1100

1129

"""This function is a scope container to pass

1101

1130

func1 and func2 to the "call_both" function

1102

1131

outside of its arguments"""

1132

1103

1133

def call_both(*args, **kwargs):

1104

1134

"""This function will emit two D-Bus

1105

1135

signals by calling func1 and func2"""

1106

1136

func1(*args, **kwargs)

1107

1137

func2(*args, **kwargs)

1138

1108

1139

return call_both

1109

1140

# Create the "call_both" function and add it to

1110

1141

# the class

1115

1146

# object. Decorate it to be a new D-Bus method

1116

1147

# with the alternate D-Bus interface name. Add it

1117

1148

# to the class.

1118

attr[attrname] = (dbus.service.method

1119

(alt_interface,

1120

attribute._dbus_in_signature,

1121

attribute._dbus_out_signature)

1122

(types.FunctionType

1123

(attribute.func_code,

1124

attribute.func_globals,

1125

attribute.func_name,

1126

attribute.func_defaults,

1127

attribute.func_closure)))

1149

attr[attrname] = (

1150

dbus.service.method(

1151

alt_interface,

1152

attribute._dbus_in_signature,

1153

attribute._dbus_out_signature)

1154

(types.FunctionType(attribute.func_code,

1155

attribute.func_globals,

1156

attribute.func_name,

1157

attribute.func_defaults,

1158

attribute.func_closure)))

1128

1159

# Copy annotations, if any

1129

1160

try:

1130

attr[attrname]._dbus_annotations = (

1131

dict(attribute._dbus_annotations))

1161

attr[attrname]._dbus_annotations = dict(

1162

attribute._dbus_annotations)

1132

1163

except AttributeError:

1133

1164

pass

1134

1165

# Is this a D-Bus property?

1137

1168

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

1138

1169

# property with the alternate D-Bus interface

1139

1170

# name. Add it to the class.

1140

attr[attrname] = (dbus_service_property

1141

(alt_interface,

1142

attribute._dbus_signature,

1143

attribute._dbus_access,

1144

attribute

1145

._dbus_get_args_options

1146

["byte_arrays"])

1147

(types.FunctionType

1148

(attribute.func_code,

1149

attribute.func_globals,

1150

attribute.func_name,

1151

attribute.func_defaults,

1152

attribute.func_closure)))

1171

attr[attrname] = (dbus_service_property(

1172

alt_interface, attribute._dbus_signature,

1173

attribute._dbus_access,

1174

attribute._dbus_get_args_options

1175

["byte_arrays"])

1176

(types.FunctionType(

1177

attribute.func_code,

1178

attribute.func_globals,

1179

attribute.func_name,

1180

attribute.func_defaults,

1181

attribute.func_closure)))

1153

1182

# Copy annotations, if any

1154

1183

try:

1155

attr[attrname]._dbus_annotations = (

1156

dict(attribute._dbus_annotations))

1184

attr[attrname]._dbus_annotations = dict(

1185

attribute._dbus_annotations)

1157

1186

except AttributeError:

1158

1187

pass

1159

1188

# Is this a D-Bus interface?

1162

1191

# object. Decorate it to be a new D-Bus interface

1163

1192

# with the alternate D-Bus interface name. Add it

1164

1193

# to the class.

1165

attr[attrname] = (dbus_interface_annotations

1166

(alt_interface)

1167

(types.FunctionType

1168

(attribute.func_code,

1169

attribute.func_globals,

1170

attribute.func_name,

1171

attribute.func_defaults,

1172

attribute.func_closure)))

1194

attr[attrname] = (

1195

dbus_interface_annotations(alt_interface)

1196

(types.FunctionType(attribute.func_code,

1197

attribute.func_globals,

1198

attribute.func_name,

1199

attribute.func_defaults,

1200

attribute.func_closure)))

1173

1201

if deprecate:

1174

1202

# Deprecate all alternate interfaces

1175

iname="_AlternateDBusNames_interface_annotation{0}"

1203

iname="_AlternateDBusNames_interface_annotation{}"

1176

1204

for interface_name in interface_names:

1205

1177

1206

@dbus_interface_annotations(interface_name)

1178

1207

def func(self):

1179

1208

return { "org.freedesktop.DBus.Deprecated":

1180

"true" }

1209

"true" }

1181

1210

# Find an unused name

1182

1211

for aname in (iname.format(i)

1183

1212

for i in itertools.count()):

1187

1216

if interface_names:

1188

1217

# Replace the class with a new subclass of it with

1189

1218

# methods, signals, etc. as created above.

1190

cls = type(b"{0}Alternate".format(cls.__name__),

1191

(cls,), attr)

1219

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

1220

(cls, ), attr)

1192

1221

return cls

1222

1193

1223

return wrapper

1194

1224

1195

1225

1196

1226

@alternate_dbus_interfaces({"se.recompile.Mandos":

1197

"se.bsnet.fukt.Mandos"})

1227

"se.bsnet.fukt.Mandos"})

1198

1228

class ClientDBus(Client, DBusObjectWithProperties):

1199

1229

"""A Client class using D-Bus

1200

1230

1204

1234

"""

1205

1235

1206

1236

runtime_expansions = (Client.runtime_expansions

1207

+ ("dbus_object_path",))

1237

+ ("dbus_object_path", ))

1238

1239

_interface = "se.recompile.Mandos.Client"

1208

1240

1209

1241

# dbus.service.Object doesn't use super(), so we can't either.

1210

1242

1213

1245

Client.__init__(self, *args, **kwargs)

1214

1246

# Only now, when this client is initialized, can it show up on

1215

1247

# the D-Bus

1216

client_object_name = unicode(self.name).translate(

1248

client_object_name = str(self.name).translate(

1217

1249

{ord("."): ord("_"),

1218

1250

ord("-"): ord("_")})

1219

self.dbus_object_path = (dbus.ObjectPath

1220

("/clients/" + client_object_name))

1251

self.dbus_object_path = dbus.ObjectPath(

1252

"/clients/" + client_object_name)

1221

1253

DBusObjectWithProperties.__init__(self, self.bus,

1222

1254

self.dbus_object_path)

1223

1255

1224

def notifychangeproperty(transform_func,

1225

dbus_name, type_func=lambda x: x,

1226

variant_level=1):

1256

def notifychangeproperty(transform_func, dbus_name,

1257

type_func=lambda x: x,

1258

variant_level=1,

1259

invalidate_only=False,

1260

_interface=_interface):

1227

1261

""" Modify a variable so that it's a property which announces

1228

1262

its changes to DBus.

1229

1263

1234

1268

to the D-Bus. Default: no transform

1235

1269

variant_level: D-Bus variant level. Default: 1

1236

1270

"""

1237

attrname = "_{0}".format(dbus_name)

1271

attrname = "_{}".format(dbus_name)

1272

1238

1273

def setter(self, value):

1239

1274

if hasattr(self, "dbus_object_path"):

1240

1275

if (not hasattr(self, attrname) or

1241

1276

type_func(getattr(self, attrname, None))

1242

1277

!= type_func(value)):

1243

dbus_value = transform_func(type_func(value),

1244

variant_level

1245

=variant_level)

1246

self.PropertyChanged(dbus.String(dbus_name),

1247

dbus_value)

1278

if invalidate_only:

1279

self.PropertiesChanged(

1280

_interface, dbus.Dictionary(),

1281

dbus.Array((dbus_name, )))

1282

else:

1283

dbus_value = transform_func(

1284

type_func(value),

1285

variant_level = variant_level)

1286

self.PropertyChanged(dbus.String(dbus_name),

1287

dbus_value)

1288

self.PropertiesChanged(

1289

_interface,

1290

dbus.Dictionary({ dbus.String(dbus_name):

1291

dbus_value }),

1292

dbus.Array())

1248

1293

setattr(self, attrname, value)

1249

1294

1250

1295

return property(lambda self: getattr(self, attrname), setter)

1256

1301

enabled = notifychangeproperty(dbus.Boolean, "Enabled")

1257

1302

last_enabled = notifychangeproperty(datetime_to_dbus,

1258

1303

"LastEnabled")

1259

checker = notifychangeproperty(dbus.Boolean, "CheckerRunning",

1260

type_func = lambda checker:

1261

checker is not None)

1304

checker = notifychangeproperty(

1305

dbus.Boolean, "CheckerRunning",

1306

type_func = lambda checker: checker is not None)

1262

1307

last_checked_ok = notifychangeproperty(datetime_to_dbus,

1263

1308

"LastCheckedOK")

1264

1309

last_checker_status = notifychangeproperty(dbus.Int16,

1267

1312

datetime_to_dbus, "LastApprovalRequest")

1268

1313

approved_by_default = notifychangeproperty(dbus.Boolean,

1269

1314

"ApprovedByDefault")

1270

approval_delay = notifychangeproperty(dbus.UInt64,

1271

"ApprovalDelay",

1272

type_func =

1273

timedelta_to_milliseconds)

1315

approval_delay = notifychangeproperty(

1316

dbus.UInt64, "ApprovalDelay",

1317

type_func = lambda td: td.total_seconds() * 1000)

1274

1318

approval_duration = notifychangeproperty(

1275

1319

dbus.UInt64, "ApprovalDuration",

1276

type_func = timedelta_to_milliseconds)

1320

type_func = lambda td: td.total_seconds() * 1000)

1277

1321

host = notifychangeproperty(dbus.String, "Host")

1278

timeout = notifychangeproperty(dbus.UInt64, "Timeout",

1279

type_func =

1280

timedelta_to_milliseconds)

1322

timeout = notifychangeproperty(

1323

dbus.UInt64, "Timeout",

1324

type_func = lambda td: td.total_seconds() * 1000)

1281

1325

extended_timeout = notifychangeproperty(

1282

1326

dbus.UInt64, "ExtendedTimeout",

1283

type_func = timedelta_to_milliseconds)

1284

interval = notifychangeproperty(dbus.UInt64,

1285

"Interval",

1286

type_func =

1287

timedelta_to_milliseconds)

1327

type_func = lambda td: td.total_seconds() * 1000)

1328

interval = notifychangeproperty(

1329

dbus.UInt64, "Interval",

1330

type_func = lambda td: td.total_seconds() * 1000)

1288

1331

checker_command = notifychangeproperty(dbus.String, "Checker")

1332

secret = notifychangeproperty(dbus.ByteArray, "Secret",

1333

invalidate_only=True)

1289

1334

1290

1335

del notifychangeproperty

1291

1336

1318

1363

*args, **kwargs)

1319

1364

1320

1365

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

1321

old_checker = self.checker

1322

if self.checker is not None:

1323

old_checker_pid = self.checker.pid

1324

else:

1325

old_checker_pid = None

1366

old_checker_pid = getattr(self.checker, "pid", None)

1326

1367

r = Client.start_checker(self, *args, **kwargs)

1327

1368

# Only if new checker process was started

1328

1369

if (self.checker is not None

1337

1378

1338

1379

def approve(self, value=True):

1339

1380

self.approved = value

1340

gobject.timeout_add(timedelta_to_milliseconds

1341

(self.approval_duration),

1342

self._reset_approved)

1381

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

1382

* 1000), self._reset_approved)

1343

1383

self.send_changedstate()

1344

1384

1345

1385

## D-Bus methods, signals & properties

1346

_interface = "se.recompile.Mandos.Client"

1347

1386

1348

1387

## Interfaces

1349

1388

1350

@dbus_interface_annotations(_interface)

1351

def _foo(self):

1352

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

1353

"false"}

1354

1355

1389

## Signals

1356

1390

1357

1391

# CheckerCompleted - signal

1367

1401

pass

1368

1402

1369

1403

# PropertyChanged - signal

1404

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

1370

1405

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

1371

1406

def PropertyChanged(self, property, value):

1372

1407

"D-Bus signal"

1436

1471

return dbus.Boolean(bool(self.approvals_pending))

1437

1472

1438

1473

# ApprovedByDefault - property

1439

@dbus_service_property(_interface, signature="b",

1474

@dbus_service_property(_interface,

1475

signature="b",

1440

1476

access="readwrite")

1441

1477

def ApprovedByDefault_dbus_property(self, value=None):

1442

1478

if value is None: # get

1444

1480

self.approved_by_default = bool(value)

1445

1481

1446

1482

# ApprovalDelay - property

1447

@dbus_service_property(_interface, signature="t",

1483

@dbus_service_property(_interface,

1484

signature="t",

1448

1485

access="readwrite")

1449

1486

def ApprovalDelay_dbus_property(self, value=None):

1450

1487

if value is None: # get

1451

return dbus.UInt64(self.approval_delay_milliseconds())

1488

return dbus.UInt64(self.approval_delay.total_seconds()

1489

* 1000)

1452

1490

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

1453

1491

1454

1492

# ApprovalDuration - property

1455

@dbus_service_property(_interface, signature="t",

1493

@dbus_service_property(_interface,

1494

signature="t",

1456

1495

access="readwrite")

1457

1496

def ApprovalDuration_dbus_property(self, value=None):

1458

1497

if value is None: # get

1459

return dbus.UInt64(timedelta_to_milliseconds(

1460

self.approval_duration))

1498

return dbus.UInt64(self.approval_duration.total_seconds()

1499

* 1000)

1461

1500

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

1462

1501

1463

1502

# Name - property

1471

1510

return dbus.String(self.fingerprint)

1472

1511

1473

1512

# Host - property

1474

@dbus_service_property(_interface, signature="s",

1513

@dbus_service_property(_interface,

1514

signature="s",

1475

1515

access="readwrite")

1476

1516

def Host_dbus_property(self, value=None):

1477

1517

if value is None: # get

1478

1518

return dbus.String(self.host)

1479

self.host = unicode(value)

1519

self.host = str(value)

1480

1520

1481

1521

# Created - property

1482

1522

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

1489

1529

return datetime_to_dbus(self.last_enabled)

1490

1530

1491

1531

# Enabled - property

1492

@dbus_service_property(_interface, signature="b",

1532

@dbus_service_property(_interface,

1533

signature="b",

1493

1534

access="readwrite")

1494

1535

def Enabled_dbus_property(self, value=None):

1495

1536

if value is None: # get

1500

1541

self.disable()

1501

1542

1502

1543

# LastCheckedOK - property

1503

@dbus_service_property(_interface, signature="s",

1544

@dbus_service_property(_interface,

1545

signature="s",

1504

1546

access="readwrite")

1505

1547

def LastCheckedOK_dbus_property(self, value=None):

1506

1548

if value is not None:

1509

1551

return datetime_to_dbus(self.last_checked_ok)

1510

1552

1511

1553

# LastCheckerStatus - property

1512

@dbus_service_property(_interface, signature="n",

1513

access="read")

1554

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

1514

1555

def LastCheckerStatus_dbus_property(self):

1515

1556

return dbus.Int16(self.last_checker_status)

1516

1557

1525

1566

return datetime_to_dbus(self.last_approval_request)

1526

1567

1527

1568

# Timeout - property

1528

@dbus_service_property(_interface, signature="t",

1569

@dbus_service_property(_interface,

1570

signature="t",

1529

1571

access="readwrite")

1530

1572

def Timeout_dbus_property(self, value=None):

1531

1573

if value is None: # get

1532

return dbus.UInt64(self.timeout_milliseconds())

1574

return dbus.UInt64(self.timeout.total_seconds() * 1000)

1533

1575

old_timeout = self.timeout

1534

1576

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

1535

1577

# Reschedule disabling

1544

1586

is None):

1545

1587

return

1546

1588

gobject.source_remove(self.disable_initiator_tag)

1547

self.disable_initiator_tag = (

1548

gobject.timeout_add(

1549

timedelta_to_milliseconds(self.expires - now),

1550

self.disable))

1589

self.disable_initiator_tag = gobject.timeout_add(

1590

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

1591

self.disable)

1551

1592

1552

1593

# ExtendedTimeout - property

1553

@dbus_service_property(_interface, signature="t",

1594

@dbus_service_property(_interface,

1595

signature="t",

1554

1596

access="readwrite")

1555

1597

def ExtendedTimeout_dbus_property(self, value=None):

1556

1598

if value is None: # get

1557

return dbus.UInt64(self.extended_timeout_milliseconds())

1599

return dbus.UInt64(self.extended_timeout.total_seconds()

1600

* 1000)

1558

1601

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

1559

1602

1560

1603

# Interval - property

1561

@dbus_service_property(_interface, signature="t",

1604

@dbus_service_property(_interface,

1605

signature="t",

1562

1606

access="readwrite")

1563

1607

def Interval_dbus_property(self, value=None):

1564

1608

if value is None: # get

1565

return dbus.UInt64(self.interval_milliseconds())

1609

return dbus.UInt64(self.interval.total_seconds() * 1000)

1566

1610

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

1567

1611

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

1568

1612

return

1569

1613

if self.enabled:

1570

1614

# Reschedule checker run

1571

1615

gobject.source_remove(self.checker_initiator_tag)

1572

self.checker_initiator_tag = (gobject.timeout_add

1573

(value, self.start_checker))

1574

self.start_checker() # Start one now, too

1616

self.checker_initiator_tag = gobject.timeout_add(

1617

value, self.start_checker)

1618

self.start_checker() # Start one now, too

1575

1619

1576

1620

# Checker - property

1577

@dbus_service_property(_interface, signature="s",

1621

@dbus_service_property(_interface,

1622

signature="s",

1578

1623

access="readwrite")

1579

1624

def Checker_dbus_property(self, value=None):

1580

1625

if value is None: # get

1581

1626

return dbus.String(self.checker_command)

1582

self.checker_command = unicode(value)

1627

self.checker_command = str(value)

1583

1628

1584

1629

# CheckerRunning - property

1585

@dbus_service_property(_interface, signature="b",

1630

@dbus_service_property(_interface,

1631

signature="b",

1586

1632

access="readwrite")

1587

1633

def CheckerRunning_dbus_property(self, value=None):

1588

1634

if value is None: # get

1598

1644

return self.dbus_object_path # is already a dbus.ObjectPath

1599

1645

1600

1646

# Secret = property

1601

@dbus_service_property(_interface, signature="ay",

1602

access="write", byte_arrays=True)

1647

@dbus_service_property(_interface,

1648

signature="ay",

1649

access="write",

1650

byte_arrays=True)

1603

1651

def Secret_dbus_property(self, value):

1604

self.secret = str(value)

1652

self.secret = bytes(value)

1605

1653

1606

1654

del _interface

1607

1655

1621

1669

if data[0] == 'data':

1622

1670

return data[1]

1623

1671

if data[0] == 'function':

1672

1624

1673

def func(*args, **kwargs):

1625

1674

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

1626

1675

return self._pipe.recv()[1]

1676

1627

1677

return func

1628

1678

1629

1679

def __setattr__(self, name, value):

1641

1691

def handle(self):

1642

1692

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

1643

1693

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

1644

unicode(self.client_address))

1694

str(self.client_address))

1645

1695

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

1646

1696

self.server.child_pipe.fileno())

1647

1697

1648

session = (gnutls.connection

1649

.ClientSession(self.request,

1650

gnutls.connection

1651

.X509Credentials()))

1698

session = gnutls.connection.ClientSession(

1699

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

1652

1700

1653

1701

# Note: gnutls.connection.X509Credentials is really a

1654

1702

# generic GnuTLS certificate credentials object so long as

1663

1711

priority = self.server.gnutls_priority

1664

1712

if priority is None:

1665

1713

priority = "NORMAL"

1666

(gnutls.library.functions

1667

.gnutls_priority_set_direct(session._c_object,

1668

priority, None))

1714

gnutls.library.functions.gnutls_priority_set_direct(

1715

session._c_object, priority, None)

1669

1716

1670

1717

# Start communication using the Mandos protocol

1671

1718

# Get protocol number

1673

1720

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

1674

1721

try:

1675

1722

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

1676

raise RuntimeError

1723

raise RuntimeError(line)

1677

1724

except (ValueError, IndexError, RuntimeError) as error:

1678

1725

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

1679

1726

return

1691

1738

approval_required = False

1692

1739

try:

1693

1740

try:

1694

fpr = self.fingerprint(self.peer_certificate

1695

(session))

1741

fpr = self.fingerprint(

1742

self.peer_certificate(session))

1696

1743

except (TypeError,

1697

1744

gnutls.errors.GNUTLSError) as error:

1698

1745

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

1713

1760

while True:

1714

1761

if not client.enabled:

1715

1762

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

1716

client.name)

1763

client.name)

1717

1764

if self.server.use_dbus:

1718

1765

# Emit D-Bus signal

1719

1766

client.Rejected("Disabled")

1728

1775

if self.server.use_dbus:

1729

1776

# Emit D-Bus signal

1730

1777

client.NeedApproval(

1731

client.approval_delay_milliseconds(),

1732

client.approved_by_default)

1778

client.approval_delay.total_seconds()

1779

* 1000, client.approved_by_default)

1733

1780

else:

1734

1781

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

1735

1782

client.name)

1741

1788

#wait until timeout or approved

1742

1789

time = datetime.datetime.now()

1743

1790

client.changedstate.acquire()

1744

client.changedstate.wait(

1745

float(timedelta_to_milliseconds(delay)

1746

/ 1000))

1791

client.changedstate.wait(delay.total_seconds())

1747

1792

client.changedstate.release()

1748

1793

time2 = datetime.datetime.now()

1749

1794

if (time2 - time) >= delay:

1768

1813

logger.warning("gnutls send failed",

1769

1814

exc_info=error)

1770

1815

return

1771

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

1772

sent, len(client.secret)

1773

- (sent_size + sent))

1816

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

1817

len(client.secret) - (sent_size

1818

+ sent))

1774

1819

sent_size += sent

1775

1820

1776

1821

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

1793

1838

def peer_certificate(session):

1794

1839

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

1795

1840

# If not an OpenPGP certificate...

1796

if (gnutls.library.functions

1797

.gnutls_certificate_type_get(session._c_object)

1841

if (gnutls.library.functions.gnutls_certificate_type_get(

1842

session._c_object)

1798

1843

!= gnutls.library.constants.GNUTLS_CRT_OPENPGP):

1799

1844

# ...do the normal thing

1800

1845

return session.peer_certificate

1814

1859

def fingerprint(openpgp):

1815

1860

"Convert an OpenPGP bytestring to a hexdigit fingerprint"

1816

1861

# New GnuTLS "datum" with the OpenPGP public key

1817

datum = (gnutls.library.types

1818

.gnutls_datum_t(ctypes.cast(ctypes.c_char_p(openpgp),

1819

ctypes.POINTER

1820

(ctypes.c_ubyte)),

1821

ctypes.c_uint(len(openpgp))))

1862

datum = gnutls.library.types.gnutls_datum_t(

1863

ctypes.cast(ctypes.c_char_p(openpgp),

1864

ctypes.POINTER(ctypes.c_ubyte)),

1865

ctypes.c_uint(len(openpgp)))

1822

1866

# New empty GnuTLS certificate

1823

1867

crt = gnutls.library.types.gnutls_openpgp_crt_t()

1824

(gnutls.library.functions

1825

.gnutls_openpgp_crt_init(ctypes.byref(crt)))

1868

gnutls.library.functions.gnutls_openpgp_crt_init(

1869

ctypes.byref(crt))

1826

1870

# Import the OpenPGP public key into the certificate

1827

(gnutls.library.functions

1828

.gnutls_openpgp_crt_import(crt, ctypes.byref(datum),

1829

gnutls.library.constants

1830

.GNUTLS_OPENPGP_FMT_RAW))

1871

gnutls.library.functions.gnutls_openpgp_crt_import(

1872

crt, ctypes.byref(datum),

1873

gnutls.library.constants.GNUTLS_OPENPGP_FMT_RAW)

1831

1874

# Verify the self signature in the key

1832

1875

crtverify = ctypes.c_uint()

1833

(gnutls.library.functions

1834

.gnutls_openpgp_crt_verify_self(crt, 0,

1835

ctypes.byref(crtverify)))

1876

gnutls.library.functions.gnutls_openpgp_crt_verify_self(

1877

crt, 0, ctypes.byref(crtverify))

1836

1878

if crtverify.value != 0:

1837

1879

gnutls.library.functions.gnutls_openpgp_crt_deinit(crt)

1838

raise (gnutls.errors.CertificateSecurityError

1839

("Verify failed"))

1880

raise gnutls.errors.CertificateSecurityError(

1881

"Verify failed")

1840

1882

# New buffer for the fingerprint

1841

1883

buf = ctypes.create_string_buffer(20)

1842

1884

buf_len = ctypes.c_size_t()

1843

1885

# Get the fingerprint from the certificate into the buffer

1844

(gnutls.library.functions

1845

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

1846

ctypes.byref(buf_len)))

1886

gnutls.library.functions.gnutls_openpgp_crt_get_fingerprint(

1887

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

1847

1888

# Deinit the certificate

1848

1889

gnutls.library.functions.gnutls_openpgp_crt_deinit(crt)

1849

1890

# Convert the buffer to a Python bytestring

1855

1896

1856

1897

class MultiprocessingMixIn(object):

1857

1898

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

1899

1858

1900

def sub_process_main(self, request, address):

1859

1901

try:

1860

1902

self.finish_request(request, address)

1872

1914

1873

1915

class MultiprocessingMixInWithPipe(MultiprocessingMixIn, object):

1874

1916

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

1917

1875

1918

def process_request(self, request, client_address):

1876

1919

"""Overrides and wraps the original process_request().

1877

1920

1886

1929

1887

1930

def add_pipe(self, parent_pipe, proc):

1888

1931

"""Dummy function; override as necessary"""

1889

raise NotImplementedError

1932

raise NotImplementedError()

1890

1933

1891

1934

1892

1935

class IPv6_TCPServer(MultiprocessingMixInWithPipe,

1898

1941

interface: None or a network interface name (string)

1899

1942

use_ipv6: Boolean; to use IPv6 or not

1900

1943

"""

1944

1901

1945

def __init__(self, server_address, RequestHandlerClass,

1902

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

1946

interface=None,

1947

use_ipv6=True,

1948

socketfd=None):

1903

1949

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

1904

1950

creating a new one with socket.socket().

1905

1951

"""

1946

1992

self.interface)

1947

1993

else:

1948

1994

try:

1949

self.socket.setsockopt(socket.SOL_SOCKET,

1950

SO_BINDTODEVICE,

1951

str(self.interface

1952

+ '\0'))

1995

self.socket.setsockopt(

1996

socket.SOL_SOCKET, SO_BINDTODEVICE,

1997

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

1953

1998

except socket.error as error:

1954

1999

if error.errno == errno.EPERM:

1955

logger.error("No permission to"

1956

" bind to interface %s",

1957

self.interface)

2000

logger.error("No permission to bind to"

2001

" interface %s", self.interface)

1958

2002

elif error.errno == errno.ENOPROTOOPT:

1959

2003

logger.error("SO_BINDTODEVICE not available;"

1960

2004

" cannot bind to interface %s",

1961

2005

self.interface)

1962

2006

elif error.errno == errno.ENODEV:

1963

logger.error("Interface %s does not"

1964

" exist, cannot bind",

1965

self.interface)

2007

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

2008

" cannot bind", self.interface)

1966

2009

else:

1967

2010

raise

1968

2011

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

1971

2014

if self.address_family == socket.AF_INET6:

1972

2015

any_address = "::" # in6addr_any

1973

2016

else:

1974

any_address = socket.INADDR_ANY

2017

any_address = "0.0.0.0" # INADDR_ANY

1975

2018

self.server_address = (any_address,

1976

2019

self.server_address[1])

1977

2020

elif not self.server_address[1]:

1978

self.server_address = (self.server_address[0],

1979

0)

2021

self.server_address = (self.server_address[0], 0)

1980

2022

# if self.interface:

1981

2023

# self.server_address = (self.server_address[0],

1982

2024

# 0, # port

1996

2038

1997

2039

Assumes a gobject.MainLoop event loop.

1998

2040

"""

2041

1999

2042

def __init__(self, server_address, RequestHandlerClass,

2000

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

2001

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

2043

interface=None,

2044

use_ipv6=True,

2045

clients=None,

2046

gnutls_priority=None,

2047

use_dbus=True,

2048

socketfd=None):

2002

2049

self.enabled = False

2003

2050

self.clients = clients

2004

2051

if self.clients is None:

2010

2057

interface = interface,

2011

2058

use_ipv6 = use_ipv6,

2012

2059

socketfd = socketfd)

2060

2013

2061

def server_activate(self):

2014

2062

if self.enabled:

2015

2063

return socketserver.TCPServer.server_activate(self)

2019

2067

2020

2068

def add_pipe(self, parent_pipe, proc):

2021

2069

# Call "handle_ipc" for both data and EOF events

2022

gobject.io_add_watch(parent_pipe.fileno(),

2023

gobject.IO_IN | gobject.IO_HUP,

2024

functools.partial(self.handle_ipc,

2025

parent_pipe =

2026

parent_pipe,

2027

proc = proc))

2070

gobject.io_add_watch(

2071

parent_pipe.fileno(),

2072

gobject.IO_IN | gobject.IO_HUP,

2073

functools.partial(self.handle_ipc,

2074

parent_pipe = parent_pipe,

2075

proc = proc))

2028

2076

2029

def handle_ipc(self, source, condition, parent_pipe=None,

2030

proc = None, client_object=None):

2077

def handle_ipc(self, source, condition,

2078

parent_pipe=None,

2079

proc = None,

2080

client_object=None):

2031

2081

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

2032

2082

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

2033

2083

# Wait for other process to exit

2056

2106

parent_pipe.send(False)

2057

2107

return False

2058

2108

2059

gobject.io_add_watch(parent_pipe.fileno(),

2060

gobject.IO_IN | gobject.IO_HUP,

2061

functools.partial(self.handle_ipc,

2062

parent_pipe =

2063

parent_pipe,

2064

proc = proc,

2065

client_object =

2066

client))

2109

gobject.io_add_watch(

2110

parent_pipe.fileno(),

2111

gobject.IO_IN | gobject.IO_HUP,

2112

functools.partial(self.handle_ipc,

2113

parent_pipe = parent_pipe,

2114

proc = proc,

2115

client_object = client))

2067

2116

parent_pipe.send(True)

2068

2117

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

2069

2118

# same fileno

2075

2124

2076

2125

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

2077

2126

funcname)(*args,

2078

**kwargs)))

2127

**kwargs)))

2079

2128

2080

2129

if command == 'getattr':

2081

2130

attrname = request[1]

2082

2131

if callable(client_object.__getattribute__(attrname)):

2083

parent_pipe.send(('function',))

2132

parent_pipe.send(('function', ))

2084

2133

else:

2085

parent_pipe.send(('data', client_object

2086

.__getattribute__(attrname)))

2134

parent_pipe.send((

2135

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

2087

2136

2088

2137

if command == 'setattr':

2089

2138

attrname = request[1]

2093

2142

return True

2094

2143

2095

2144

2145

def rfc3339_duration_to_delta(duration):

2146

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

2147

2148

>>> rfc3339_duration_to_delta("P7D")

2149

datetime.timedelta(7)

2150

>>> rfc3339_duration_to_delta("PT60S")

2151

datetime.timedelta(0, 60)

2152

>>> rfc3339_duration_to_delta("PT60M")

2153

datetime.timedelta(0, 3600)

2154

>>> rfc3339_duration_to_delta("PT24H")

2155

datetime.timedelta(1)

2156

>>> rfc3339_duration_to_delta("P1W")

2157

datetime.timedelta(7)

2158

>>> rfc3339_duration_to_delta("PT5M30S")

2159

datetime.timedelta(0, 330)

2160

>>> rfc3339_duration_to_delta("P1DT3M20S")

2161

datetime.timedelta(1, 200)

2162

"""

2163

2164

# Parsing an RFC 3339 duration with regular expressions is not

2165

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

2166

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

2167

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

2168

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

2169

# avoid excessive use of external libraries.

2170

2171

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

2172

Token = collections.namedtuple("Token",

2173

("regexp", # To match token; if

2174

# "value" is not None,

2175

# must have a "group"

2176

# containing digits

2177

"value", # datetime.timedelta or

2178

# None

2179

"followers")) # Tokens valid after

2180

# this token

2181

Token = collections.namedtuple("Token", (

2182

"regexp", # To match token; if "value" is not None, must have

2183

# a "group" containing digits

2184

"value", # datetime.timedelta or None

2185

"followers")) # Tokens valid after this token

2186

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

2187

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

2188

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

2189

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

2190

datetime.timedelta(seconds=1),

2191

frozenset((token_end, )))

2192

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

2193

datetime.timedelta(minutes=1),

2194

frozenset((token_second, token_end)))

2195

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

2196

datetime.timedelta(hours=1),

2197

frozenset((token_minute, token_end)))

2198

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

2199

None,

2200

frozenset((token_hour, token_minute,

2201

token_second)))

2202

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

2203

datetime.timedelta(days=1),

2204

frozenset((token_time, token_end)))

2205

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

2206

datetime.timedelta(weeks=4),

2207

frozenset((token_day, token_end)))

2208

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

2209

datetime.timedelta(weeks=52),

2210

frozenset((token_month, token_end)))

2211

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

2212

datetime.timedelta(weeks=1),

2213

frozenset((token_end, )))

2214

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

2215

frozenset((token_year, token_month,

2216

token_day, token_time,

2217

token_week)))

2218

# Define starting values

2219

value = datetime.timedelta() # Value so far

2220

found_token = None

2221

followers = frozenset((token_duration,)) # Following valid tokens

2222

s = duration # String left to parse

2223

# Loop until end token is found

2224

while found_token is not token_end:

2225

# Search for any currently valid tokens

2226

for token in followers:

2227

match = token.regexp.match(s)

2228

if match is not None:

2229

# Token found

2230

if token.value is not None:

2231

# Value found, parse digits

2232

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

2233

# Add to value so far

2234

value += factor * token.value

2235

# Strip token from string

2236

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

2237

# Go to found token

2238

found_token = token

2239

# Set valid next tokens

2240

followers = found_token.followers

2241

break

2242

else:

2243

# No currently valid tokens were found

2244

raise ValueError("Invalid RFC 3339 duration")

2245

# End token found

2246

return value

2247

2248

2096

2249

def string_to_delta(interval):

2097

2250

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

2098

2251

2109

2262

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

2110

2263

datetime.timedelta(0, 330)

2111

2264

"""

2265

2266

try:

2267

return rfc3339_duration_to_delta(interval)

2268

except ValueError:

2269

pass

2270

2112

2271

timevalue = datetime.timedelta(0)

2113

2272

for s in interval.split():

2114

2273

try:

2115

suffix = unicode(s[-1])

2274

suffix = s[-1]

2116

2275

value = int(s[:-1])

2117

2276

if suffix == "d":

2118

2277

delta = datetime.timedelta(value)

2125

2284

elif suffix == "w":

2126

2285

delta = datetime.timedelta(0, 0, 0, 0, 0, 0, value)

2127

2286

else:

2128

raise ValueError("Unknown suffix {0!r}"

2129

.format(suffix))

2130

except (ValueError, IndexError) as e:

2287

raise ValueError("Unknown suffix {!r}".format(suffix))

2288

except IndexError as e:

2131

2289

raise ValueError(*(e.args))

2132

2290

timevalue += delta

2133

2291

return timevalue

2149

2307

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

2150

2308

if not stat.S_ISCHR(os.fstat(null).st_mode):

2151

2309

raise OSError(errno.ENODEV,

2152

"{0} not a character device"

2310

"{} not a character device"

2153

2311

.format(os.devnull))

2154

2312

os.dup2(null, sys.stdin.fileno())

2155

2313

os.dup2(null, sys.stdout.fileno())

2165

2323

2166

2324

parser = argparse.ArgumentParser()

2167

2325

parser.add_argument("-v", "--version", action="version",

2168

version = "%(prog)s {0}".format(version),

2326

version = "%(prog)s {}".format(version),

2169

2327

help="show version number and exit")

2170

2328

parser.add_argument("-i", "--interface", metavar="IF",

2171

2329

help="Bind to interface IF")

2177

2335

help="Run self-test")

2178

2336

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

2179

2337

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

2180

" to terminal")

2338

" to terminal", default=None)

2181

2339

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

2182

2340

help="Debug level for stdout output")

2183

2341

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

2190

2348

" files")

2191

2349

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

2192

2350

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

2193

" system bus interface")

2351

" system bus interface", default=None)

2194

2352

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

2195

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

2353

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

2354

default=None)

2196

2355

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

2197

2356

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

2198

" state")

2357

" state", default=None)

2199

2358

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

2200

2359

help="Specify a file descriptor to a network"

2201

2360

" socket to use instead of creating one")

2202

2361

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

2203

2362

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

2363

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

2364

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

2365

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

2366

dest="zeroconf", help="Do not use Zeroconf",

2367

default=None)

2204

2368

2205

2369

options = parser.parse_args()

2206

2370

2207

2371

if options.check:

2208

2372

import doctest

2209

doctest.testmod()

2210

sys.exit()

2373

fail_count, test_count = doctest.testmod()

2374

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

2211

2375

2212

2376

# Default values for config file for server-global settings

2213

2377

server_defaults = { "interface": "",

2215

2379

"port": "",

2216

2380

"debug": "False",

2217

2381

"priority":

2218

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

2382

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

2383

":+SIGN-RSA-SHA224:+SIGN-RSA-RMD160",

2219

2384

"servicename": "Mandos",

2220

2385

"use_dbus": "True",

2221

2386

"use_ipv6": "True",

2222

2387

"debuglevel": "",

2223

2388

"restore": "True",

2224

2389

"socket": "",

2225

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

2226

}

2390

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

2391

"foreground": "False",

2392

"zeroconf": "True",

2393

}

2227

2394

2228

2395

# Parse config file for server-global settings

2229

2396

server_config = configparser.SafeConfigParser(server_defaults)

2230

2397

del server_defaults

2231

server_config.read(os.path.join(options.configdir,

2232

"mandos.conf"))

2398

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

2233

2399

# Convert the SafeConfigParser object to a dict

2234

2400

server_settings = server_config.defaults()

2235

2401

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

2236

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

2402

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

2237

2403

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

2238

2404

option)

2239

2405

if server_settings["port"]:

2253

2419

# Override the settings from the config file with command line

2254

2420

# options, if set.

2255

2421

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

2256

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

2257

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

2258

"statedir", "socket"):

2422

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

2423

"use_ipv6", "debuglevel", "restore", "statedir",

2424

"socket", "foreground", "zeroconf"):

2259

2425

value = getattr(options, option)

2260

2426

if value is not None:

2261

2427

server_settings[option] = value

2262

2428

del options

2263

2429

# Force all strings to be unicode

2264

2430

for option in server_settings.keys():

2265

if type(server_settings[option]) is str:

2266

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

2431

if isinstance(server_settings[option], bytes):

2432

server_settings[option] = (server_settings[option]

2433

.decode("utf-8"))

2434

# Force all boolean options to be boolean

2435

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

2436

"foreground", "zeroconf"):

2437

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

2438

# Debug implies foreground

2439

if server_settings["debug"]:

2440

server_settings["foreground"] = True

2267

2441

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

2268

2442

2269

2443

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

2270

2444

2445

if (not server_settings["zeroconf"]

2446

and not (server_settings["port"]

2447

or server_settings["socket"] != "")):

2448

parser.error("Needs port or socket to work without Zeroconf")

2449

2271

2450

# For convenience

2272

2451

debug = server_settings["debug"]

2273

2452

debuglevel = server_settings["debuglevel"]

2275

2454

use_ipv6 = server_settings["use_ipv6"]

2276

2455

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

2277

2456

stored_state_file)

2457

foreground = server_settings["foreground"]

2458

zeroconf = server_settings["zeroconf"]

2278

2459

2279

2460

if debug:

2280

2461

initlogger(debug, logging.DEBUG)

2286

2467

initlogger(debug, level)

2287

2468

2288

2469

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

2289

syslogger.setFormatter(logging.Formatter

2290

('Mandos ({0}) [%(process)d]:'

2291

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

2292

.format(server_settings

2293

["servicename"])))

2470

syslogger.setFormatter(

2471

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

2472

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

2473

server_settings["servicename"])))

2294

2474

2295

2475

# Parse config file with clients

2296

2476

client_config = configparser.SafeConfigParser(Client

2301

2481

global mandos_dbus_service

2302

2482

mandos_dbus_service = None

2303

2483

2304

tcp_server = MandosServer((server_settings["address"],

2305

server_settings["port"]),

2306

ClientHandler,

2307

interface=(server_settings["interface"]

2308

or None),

2309

use_ipv6=use_ipv6,

2310

gnutls_priority=

2311

server_settings["priority"],

2312

use_dbus=use_dbus,

2313

socketfd=(server_settings["socket"]

2314

or None))

2315

if not debug:

2316

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

2484

socketfd = None

2485

if server_settings["socket"] != "":

2486

socketfd = server_settings["socket"]

2487

tcp_server = MandosServer(

2488

(server_settings["address"], server_settings["port"]),

2489

ClientHandler,

2490

interface=(server_settings["interface"] or None),

2491

use_ipv6=use_ipv6,

2492

gnutls_priority=server_settings["priority"],

2493

use_dbus=use_dbus,

2494

socketfd=socketfd)

2495

if not foreground:

2496

pidfilename = "/run/mandos.pid"

2497

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

2498

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

2499

pidfile = None

2317

2500

try:

2318

2501

pidfile = open(pidfilename, "w")

2319

2502

except IOError as e:

2335

2518

os.setuid(uid)

2336

2519

except OSError as error:

2337

2520

if error.errno != errno.EPERM:

2338

raise error

2521

raise

2339

2522

2340

2523

if debug:

2341

2524

# Enable all possible GnuTLS debugging

2348

2531

def debug_gnutls(level, string):

2349

2532

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

2350

2533

2351

(gnutls.library.functions

2352

.gnutls_global_set_log_function(debug_gnutls))

2534

gnutls.library.functions.gnutls_global_set_log_function(

2535

debug_gnutls)

2353

2536

2354

2537

# Redirect stdin so all checkers get /dev/null

2355

2538

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

2358

2541

os.close(null)

2359

2542

2360

2543

# Need to fork before connecting to D-Bus

2361

if not debug:

2544

if not foreground:

2362

2545

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

2363

2546

daemon()

2364

2547

2375

2558

if use_dbus:

2376

2559

try:

2377

2560

bus_name = dbus.service.BusName("se.recompile.Mandos",

2378

bus, do_not_queue=True)

2379

old_bus_name = (dbus.service.BusName

2380

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

2381

do_not_queue=True))

2561

bus,

2562

do_not_queue=True)

2563

old_bus_name = dbus.service.BusName(

2564

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

2565

do_not_queue=True)

2382

2566

except dbus.exceptions.NameExistsException as e:

2383

2567

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

2384

2568

use_dbus = False

2385

2569

server_settings["use_dbus"] = False

2386

2570

tcp_server.use_dbus = False

2387

protocol = avahi.PROTO_INET6 if use_ipv6 else avahi.PROTO_INET

2388

service = AvahiServiceToSyslog(name =

2389

server_settings["servicename"],

2390

servicetype = "_mandos._tcp",

2391

protocol = protocol, bus = bus)

2392

if server_settings["interface"]:

2393

service.interface = (if_nametoindex

2394

(str(server_settings["interface"])))

2571

if zeroconf:

2572

protocol = avahi.PROTO_INET6 if use_ipv6 else avahi.PROTO_INET

2573

service = AvahiServiceToSyslog(

2574

name = server_settings["servicename"],

2575

servicetype = "_mandos._tcp",

2576

protocol = protocol,

2577

bus = bus)

2578

if server_settings["interface"]:

2579

service.interface = if_nametoindex(

2580

server_settings["interface"].encode("utf-8"))

2395

2581

2396

2582

global multiprocessing_manager

2397

2583

multiprocessing_manager = multiprocessing.Manager()

2404

2590

old_client_settings = {}

2405

2591

clients_data = {}

2406

2592

2593

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

2594

global wnull

2595

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

2596

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

2597

# mode

2598

if debug or not foreground:

2599

wnull.close()

2600

2407

2601

# Get client data and settings from last running state.

2408

2602

if server_settings["restore"]:

2409

2603

try:

2410

2604

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

2411

clients_data, old_client_settings = (pickle.load

2412

(stored_state))

2605

clients_data, old_client_settings = pickle.load(

2606

stored_state)

2413

2607

os.remove(stored_state_path)

2414

2608

except IOError as e:

2415

2609

if e.errno == errno.ENOENT:

2416

logger.warning("Could not load persistent state: {0}"

2417

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

2610

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

2611

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

2418

2612

else:

2419

2613

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

2420

2614

exc_info=e)

2421

2615

raise

2422

2616

except EOFError as e:

2423

2617

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

2424

"EOFError:", exc_info=e)

2618

"EOFError:",

2619

exc_info=e)

2425

2620

2426

2621

with PGPEngine() as pgp:

2427

for client_name, client in clients_data.iteritems():

2622

for client_name, client in clients_data.items():

2623

# Skip removed clients

2624

if client_name not in client_settings:

2625

continue

2626

2428

2627

# Decide which value to use after restoring saved state.

2429

2628

# We have three different values: Old config file,

2430

2629

# new config file, and saved state.

2435

2634

# For each value in new config, check if it

2436

2635

# differs from the old config value (Except for

2437

2636

# the "secret" attribute)

2438

if (name != "secret" and

2439

value != old_client_settings[client_name]

2440

[name]):

2637

if (name != "secret"

2638

and (value !=

2639

old_client_settings[client_name][name])):

2441

2640

client[name] = value

2442

2641

except KeyError:

2443

2642

pass

2451

2650

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

2452

2651

if not client["last_checked_ok"]:

2453

2652

logger.warning(

2454

"disabling client {0} - Client never "

2455

"performed a successful checker"

2456

.format(client_name))

2653

"disabling client {} - Client never "

2654

"performed a successful checker".format(

2655

client_name))

2457

2656

client["enabled"] = False

2458

2657

elif client["last_checker_status"] != 0:

2459

2658

logger.warning(

2460

"disabling client {0} - Client "

2461

"last checker failed with error code {1}"

2462

.format(client_name,

2463

client["last_checker_status"]))

2659

"disabling client {} - Client last"

2660

" checker failed with error code"

2661

" {}".format(

2662

client_name,

2663

client["last_checker_status"]))

2464

2664

client["enabled"] = False

2465

2665

else:

2466

client["expires"] = (datetime.datetime

2467

.utcnow()

2468

+ client["timeout"])

2666

client["expires"] = (

2667

datetime.datetime.utcnow()

2668

+ client["timeout"])

2469

2669

logger.debug("Last checker succeeded,"

2470

" keeping {0} enabled"

2471

.format(client_name))

2670

" keeping {} enabled".format(

2671

client_name))

2472

2672

try:

2473

client["secret"] = (

2474

pgp.decrypt(client["encrypted_secret"],

2475

client_settings[client_name]

2476

["secret"]))

2673

client["secret"] = pgp.decrypt(

2674

client["encrypted_secret"],

2675

client_settings[client_name]["secret"])

2477

2676

except PGPError:

2478

2677

# If decryption fails, we use secret from new settings

2479

logger.debug("Failed to decrypt {0} old secret"

2480

.format(client_name))

2481

client["secret"] = (

2482

client_settings[client_name]["secret"])

2678

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

2679

client_name))

2680

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

2681

["secret"])

2483

2682

2484

2683

# Add/remove clients based on new changes made to config

2485

2684

for client_name in (set(old_client_settings)

2490

2689

clients_data[client_name] = client_settings[client_name]

2491

2690

2492

2691

# Create all client objects

2493

for client_name, client in clients_data.iteritems():

2692

for client_name, client in clients_data.items():

2494

2693

tcp_server.clients[client_name] = client_class(

2495

name = client_name, settings = client)

2694

name = client_name,

2695

settings = client,

2696

server_settings = server_settings)

2496

2697

2497

2698

if not tcp_server.clients:

2498

2699

logger.warning("No clients defined")

2499

2700

2500

if not debug:

2501

try:

2502

with pidfile:

2503

pid = os.getpid()

2504

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

2505

del pidfile

2506

except IOError:

2507

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

2508

pidfilename, pid)

2509

except NameError:

2510

# "pidfile" was never created

2511

pass

2701

if not foreground:

2702

if pidfile is not None:

2703

try:

2704

with pidfile:

2705

pid = os.getpid()

2706

pidfile.write("{}\n".format(pid).encode("utf-8"))

2707

except IOError:

2708

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

2709

pidfilename, pid)

2710

del pidfile

2512

2711

del pidfilename

2513

2712

2514

2713

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

2515

2714

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

2516

2715

2517

2716

if use_dbus:

2518

@alternate_dbus_interfaces({"se.recompile.Mandos":

2519

"se.bsnet.fukt.Mandos"})

2717

2718

@alternate_dbus_interfaces(

2719

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

2520

2720

class MandosDBusService(DBusObjectWithProperties):

2521

2721

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

2722

2522

2723

def __init__(self):

2523

2724

dbus.service.Object.__init__(self, bus, "/")

2725

2524

2726

_interface = "se.recompile.Mandos"

2525

2727

2526

2728

@dbus_interface_annotations(_interface)

2527

2729

def _foo(self):

2528

return { "org.freedesktop.DBus.Property"

2529

".EmitsChangedSignal":

2530

"false"}

2730

return {

2731

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

2732

"false" }

2531

2733

2532

2734

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

2533

2735

def ClientAdded(self, objpath):

2547

2749

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

2548

2750

def GetAllClients(self):

2549

2751

"D-Bus method"

2550

return dbus.Array(c.dbus_object_path

2551

for c in

2752

return dbus.Array(c.dbus_object_path for c in

2552

2753

tcp_server.clients.itervalues())

2553

2754

2554

2755

@dbus.service.method(_interface,

2556

2757

def GetAllClientsWithProperties(self):

2557

2758

"D-Bus method"

2558

2759

return dbus.Dictionary(

2559

((c.dbus_object_path, c.GetAll(""))

2560

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

2760

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

2761

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

2561

2762

signature="oa{sv}")

2562

2763

2563

2764

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

2580

2781

2581

2782

def cleanup():

2582

2783

"Cleanup function; run on exit"

2583

service.cleanup()

2784

if zeroconf:

2785

service.cleanup()

2584

2786

2585

2787

multiprocessing.active_children()

2788

wnull.close()

2586

2789

if not (tcp_server.clients or client_settings):

2587

2790

return

2588

2791

2599

2802

2600

2803

# A list of attributes that can not be pickled

2601

2804

# + secret.

2602

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

2603

"checker"))

2604

for name, typ in (inspect.getmembers

2605

(dbus.service.Object)):

2805

exclude = { "bus", "changedstate", "secret",

2806

"checker", "server_settings" }

2807

for name, typ in inspect.getmembers(dbus.service

2808

.Object):

2606

2809

exclude.add(name)

2607

2810

2608

2811

client_dict["encrypted_secret"] = (client

2615

2818

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

2616

2819

2617

2820

try:

2618

with (tempfile.NamedTemporaryFile

2619

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

2620

dir=os.path.dirname(stored_state_path),

2621

delete=False)) as stored_state:

2821

with tempfile.NamedTemporaryFile(

2822

mode='wb',

2823

suffix=".pickle",

2824

prefix='clients-',

2825

dir=os.path.dirname(stored_state_path),

2826

delete=False) as stored_state:

2622

2827

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

2623

tempname=stored_state.name

2828

tempname = stored_state.name

2624

2829

os.rename(tempname, stored_state_path)

2625

2830

except (IOError, OSError) as e:

2626

2831

if not debug:

2629

2834

except NameError:

2630

2835

pass

2631

2836

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

2632

logger.warning("Could not save persistent state: {0}"

2837

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

2633

2838

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

2634

2839

else:

2635

2840

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

2636

2841

exc_info=e)

2637

raise e

2842

raise

2638

2843

2639

2844

# Delete all clients, and settings from config

2640

2845

while tcp_server.clients:

2645

2850

client.disable(quiet=True)

2646

2851

if use_dbus:

2647

2852

# Emit D-Bus signal

2648

mandos_dbus_service.ClientRemoved(client

2649

.dbus_object_path,

2650

client.name)

2853

mandos_dbus_service.ClientRemoved(

2854

client.dbus_object_path, client.name)

2651

2855

client_settings.clear()

2652

2856

2653

2857

atexit.register(cleanup)

2664

2868

tcp_server.server_activate()

2665

2869

2666

2870

# Find out what port we got

2667

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

2871

if zeroconf:

2872

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

2668

2873

if use_ipv6:

2669

2874

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

2670

2875

" flowinfo %d, scope_id %d",

2676

2881

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

2677

2882

2678

2883

try:

2679

# From the Avahi example code

2680

try:

2681

service.activate()

2682

except dbus.exceptions.DBusException as error:

2683

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

2684

cleanup()

2685

sys.exit(1)

2686

# End of Avahi example code

2884

if zeroconf:

2885

# From the Avahi example code

2886

try:

2887

service.activate()

2888

except dbus.exceptions.DBusException as error:

2889

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

2890

cleanup()

2891

sys.exit(1)

2892

# End of Avahi example code

2687

2893

2688

2894

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

2689

2895

lambda *args, **kwargs:

2704

2910

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

2705

2911

cleanup()

2706

2912

2913

2707

2914

if __name__ == '__main__':

2708

2915

main()