/mandos/release : revision 237.7.57

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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 cPickle as pickle

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import multiprocessing

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import types

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import binascii

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import tempfile

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import itertools

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import dbus

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import dbus.service

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import ctypes.util

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import xml.dom.minidom

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import inspect

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import GnuPGInterface

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try:

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SO_BINDTODEVICE = socket.SO_BINDTODEVICE

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except ImportError:

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SO_BINDTODEVICE = None

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version = "1.5.3"

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stored_state_file = "clients.pickle"

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logger = logging.getLogger()

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version = "1.3.1"

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#logger = logging.getLogger('mandos')

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logger = logging.Logger('mandos')

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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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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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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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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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syslogger.setFormatter(logging.Formatter

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

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' %(message)s'))

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logger.addHandler(syslogger)

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if debug:

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console = logging.StreamHandler()

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

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' [%(process)d]:'

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' %(levelname)s:'

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' %(message)s'))

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logger.addHandler(console)

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logger.setLevel(level)

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class PGPError(Exception):

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"""Exception if encryption/decryption fails"""

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pass

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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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def __enter__(self):

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return self

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

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self._cleanup()

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return False

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def __del__(self):

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self._cleanup()

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def _cleanup(self):

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if self.tempdir is not None:

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# Delete contents of tempdir

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for root, dirs, files in os.walk(self.tempdir,

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topdown = False):

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for filename in files:

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os.remove(os.path.join(root, filename))

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for dirname in dirs:

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os.rmdir(os.path.join(root, dirname))

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# Remove tempdir

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os.rmdir(self.tempdir)

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self.tempdir = None

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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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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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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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return decrypted_plaintext

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syslogger.setFormatter(logging.Formatter

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

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' %(message)s'))

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logger.addHandler(syslogger)

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console = logging.StreamHandler()

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console.setFormatter(logging.Formatter('%(name)s [%(process)d]:'

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' %(levelname)s:'

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' %(message)s'))

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logger.addHandler(console)

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class AvahiError(Exception):

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

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.GetAlternativeServiceName(self.name))

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

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self.name)

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syslogger.setFormatter(logging.Formatter

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

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

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% self.name))

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self.remove()

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try:

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self.add()

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avahi.DBUS_INTERFACE_ENTRY_GROUP)

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self.entry_group_state_changed_match = (

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self.group.connect_to_signal(

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'StateChanged', self.entry_group_state_changed))

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'StateChanged', self .entry_group_state_changed))

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

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self.name, self.type)

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self.group.AddService(

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try:

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self.group.Free()

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except (dbus.exceptions.UnknownMethodException,

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dbus.exceptions.DBusException):

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dbus.exceptions.DBusException) as e:

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pass

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self.group = None

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self.remove()

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self.server_state_changed)

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

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class AvahiServiceToSyslog(AvahiService):

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def rename(self):

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

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ret = AvahiService.rename(self)

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syslogger.setFormatter(logging.Formatter

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

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

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% self.name))

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return ret

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def timedelta_to_milliseconds(td):

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

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Attributes:

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

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

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

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

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

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instance %(name)s can be used in the command.

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checker_initiator_tag: a gobject event source tag, or None

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created: datetime.datetime(); (UTC) object creation

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client_structure: Object describing what attributes a client has

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and is used for storing the client at exit

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current_checker_command: string; current running checker_command

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disable_hook: If set, called by disable() as disable_hook(self)

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disable_initiator_tag: a gobject event source tag, or None

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enabled: bool()

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fingerprint: string (40 or 32 hexadecimal digits); used to

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interval: datetime.timedelta(); How often to start a new checker

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last_approval_request: datetime.datetime(); (UTC) or None

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last_checked_ok: datetime.datetime(); (UTC) or None

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last_checker_status: integer between 0 and 255 reflecting exit

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status of last checker. -1 reflects crashed

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checker, -2 means no checker completed yet.

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last_enabled: datetime.datetime(); (UTC) or None

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last_enabled: datetime.datetime(); (UTC)

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name: string; from the config file, used in log messages and

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D-Bus identifiers

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secret: bytestring; sent verbatim (over TLS) to client

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timeout: datetime.timedelta(); How long from last_checked_ok

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until this client is disabled

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extended_timeout: extra long timeout when secret has been sent

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extended_timeout: extra long timeout when password has been sent

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

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"host", "interval", "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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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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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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return _timedelta_to_milliseconds(self.interval)

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def approval_delay_milliseconds(self):

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return timedelta_to_milliseconds(self.approval_delay)

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@staticmethod

463

def config_parser(config):

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"""Construct a new dict of client settings of this form:

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{ client_name: {setting_name: value, ...}, ...}

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with exceptions for any special settings as defined above.

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NOTE: Must be a pure function. Must return the same result

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value given the same arguments.

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"""

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settings = {}

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for client_name in config.sections():

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section = dict(config.items(client_name))

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client = settings[client_name] = {}

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475

client["host"] = section["host"]

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# Reformat values from string types to Python types

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client["approved_by_default"] = config.getboolean(

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client_name, "approved_by_default")

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

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"enabled")

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

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.replace(" ", ""))

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if "secret" in section:

485

client["secret"] = section["secret"].decode("base64")

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elif "secfile" in section:

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with open(os.path.expanduser(os.path.expandvars

488

(section["secfile"])),

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"rb") as secfile:

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

491

else:

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raise TypeError("No secret or secfile for section %s"

493

% 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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section["extended_timeout"])

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

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client["approval_delay"] = string_to_delta(

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section["approval_delay"])

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client["approval_duration"] = string_to_delta(

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section["approval_duration"])

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client["checker_command"] = section["checker"]

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client["last_approval_request"] = None

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client["last_checked_ok"] = None

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client["last_checker_status"] = -2

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return settings

508

509

510

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

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return _timedelta_to_milliseconds(self.approval_delay)

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def __init__(self, name = None, disable_hook=None, config=None):

511

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"""Note: the 'checker' key in 'config' sets the

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'checker_command' attribute and *not* the 'checker'

513

337

attribute."""

514

338

self.name = name

515

# adding all client settings

516

for setting, value in settings.iteritems():

517

setattr(self, setting, value)

518

519

if self.enabled:

520

if not hasattr(self, "last_enabled"):

521

self.last_enabled = datetime.datetime.utcnow()

522

if not hasattr(self, "expires"):

523

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

524

+ self.timeout)

525

else:

526

self.last_enabled = None

527

self.expires = None

528

339

if config is None:

340

config = {}

529

341

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

530

342

# Uppercase and remove spaces from fingerprint for later

531

343

# comparison purposes with return value from the fingerprint()

532

344

# function

345

self.fingerprint = (config["fingerprint"].upper()

346

.replace(" ", ""))

533

347

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

534

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

535

datetime.datetime.utcnow())

536

537

# attributes specific for this server instance

348

if "secret" in config:

349

self.secret = config["secret"].decode("base64")

350

elif "secfile" in config:

351

with open(os.path.expanduser(os.path.expandvars

352

(config["secfile"])),

353

"rb") as secfile:

354

self.secret = secfile.read()

355

else:

356

raise TypeError("No secret or secfile for client %s"

357

% self.name)

358

self.host = config.get("host", "")

359

self.created = datetime.datetime.utcnow()

360

self.enabled = False

361

self.last_approval_request = None

362

self.last_enabled = None

363

self.last_checked_ok = None

364

self.timeout = string_to_delta(config["timeout"])

365

self.extended_timeout = string_to_delta(config

366

["extended_timeout"])

367

self.interval = string_to_delta(config["interval"])

368

self.disable_hook = disable_hook

538

369

self.checker = None

539

370

self.checker_initiator_tag = None

540

371

self.disable_initiator_tag = None

372

self.expires = None

541

373

self.checker_callback_tag = None

374

self.checker_command = config["checker"]

542

375

self.current_checker_command = None

543

self.approved = None

376

self.last_connect = None

377

self._approved = None

378

self.approved_by_default = config.get("approved_by_default",

379

True)

544

380

self.approvals_pending = 0

381

self.approval_delay = string_to_delta(

382

config["approval_delay"])

383

self.approval_duration = string_to_delta(

384

config["approval_duration"])

545

385

self.changedstate = (multiprocessing_manager

546

386

.Condition(multiprocessing_manager

547

387

.Lock()))

548

self.client_structure = [attr for attr in

549

self.__dict__.iterkeys()

550

if not attr.startswith("_")]

551

self.client_structure.append("client_structure")

552

553

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

554

lambda obj:

555

isinstance(obj,

556

property)):

557

if not name.startswith("_"):

558

self.client_structure.append(name)

559

388

560

# Send notice to process children that client state has changed

561

389

def send_changedstate(self):

562

with self.changedstate:

563

self.changedstate.notify_all()

390

self.changedstate.acquire()

391

self.changedstate.notify_all()

392

self.changedstate.release()

564

393

565

394

def enable(self):

566

395

"""Start this client's checker and timeout hooks"""

568

397

# Already enabled

569

398

return

570

399

self.send_changedstate()

400

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

401

# and every interval from then on.

402

self.checker_initiator_tag = (gobject.timeout_add

403

(self.interval_milliseconds(),

404

self.start_checker))

405

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

571

406

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

407

self.disable_initiator_tag = (gobject.timeout_add

408

(self.timeout_milliseconds(),

409

self.disable))

572

410

self.enabled = True

573

411

self.last_enabled = datetime.datetime.utcnow()

574

self.init_checker()

412

# Also start a new checker *right now*.

413

self.start_checker()

575

414

576

415

def disable(self, quiet=True):

577

416

"""Disable this client."""

589

428

gobject.source_remove(self.checker_initiator_tag)

590

429

self.checker_initiator_tag = None

591

430

self.stop_checker()

431

if self.disable_hook:

432

self.disable_hook(self)

592

433

self.enabled = False

593

434

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

594

435

return False

595

436

596

437

def __del__(self):

438

self.disable_hook = None

597

439

self.disable()

598

440

599

def init_checker(self):

600

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

601

# and every interval from then on.

602

self.checker_initiator_tag = (gobject.timeout_add

603

(self.interval_milliseconds(),

604

self.start_checker))

605

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

606

self.disable_initiator_tag = (gobject.timeout_add

607

(self.timeout_milliseconds(),

608

self.disable))

609

# Also start a new checker *right now*.

610

self.start_checker()

611

612

441

def checker_callback(self, pid, condition, command):

613

442

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

614

443

self.checker_callback_tag = None

615

444

self.checker = None

616

445

if os.WIFEXITED(condition):

617

self.last_checker_status = os.WEXITSTATUS(condition)

618

if self.last_checker_status == 0:

446

exitstatus = os.WEXITSTATUS(condition)

447

if exitstatus == 0:

619

448

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

620

449

vars(self))

621

450

self.checked_ok()

623

452

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

624

453

vars(self))

625

454

else:

626

self.last_checker_status = -1

627

455

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

628

456

vars(self))

629

457

630

def checked_ok(self):

631

"""Assert that the client has been seen, alive and well."""

632

self.last_checked_ok = datetime.datetime.utcnow()

633

self.last_checker_status = 0

634

self.bump_timeout()

635

636

def bump_timeout(self, timeout=None):

637

"""Bump up the timeout for this client."""

458

def checked_ok(self, timeout=None):

459

"""Bump up the timeout for this client.

460

461

This should only be called when the client has been seen,

462

alive and well.

463

"""

638

464

if timeout is None:

639

465

timeout = self.timeout

640

if self.disable_initiator_tag is not None:

641

gobject.source_remove(self.disable_initiator_tag)

642

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

643

self.disable_initiator_tag = (gobject.timeout_add

644

(timedelta_to_milliseconds

645

(timeout), self.disable))

646

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

466

self.last_checked_ok = datetime.datetime.utcnow()

467

gobject.source_remove(self.disable_initiator_tag)

468

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

469

self.disable_initiator_tag = (gobject.timeout_add

470

(_timedelta_to_milliseconds

471

(timeout), self.disable))

647

472

648

473

def need_approval(self):

649

474

self.last_approval_request = datetime.datetime.utcnow()

772

597

return decorator

773

598

774

599

775

def dbus_interface_annotations(dbus_interface):

776

"""Decorator for marking functions returning interface annotations.

777

778

Usage:

779

780

@dbus_interface_annotations("org.example.Interface")

781

def _foo(self): # Function name does not matter

782

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

783

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

784

"false"}

785

"""

786

def decorator(func):

787

func._dbus_is_interface = True

788

func._dbus_interface = dbus_interface

789

func._dbus_name = dbus_interface

790

return func

791

return decorator

792

793

794

def dbus_annotations(annotations):

795

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

796

Usage:

797

798

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

799

access="r")

800

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

801

"org.freedesktop.DBus.Property."

802

"EmitsChangedSignal": "false"})

803

def Property_dbus_property(self):

804

return dbus.Boolean(False)

805

"""

806

def decorator(func):

807

func._dbus_annotations = annotations

808

return func

809

return decorator

810

811

812

600

class DBusPropertyException(dbus.exceptions.DBusException):

813

601

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

814

602

"""

837

625

"""

838

626

839

627

@staticmethod

840

def _is_dbus_thing(thing):

841

"""Returns a function testing if an attribute is a D-Bus thing

842

843

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

844

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

845

"""

846

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

847

False)

628

def _is_dbus_property(obj):

629

return getattr(obj, "_dbus_is_property", False)

848

630

849

def _get_all_dbus_things(self, thing):

631

def _get_all_dbus_properties(self):

850

632

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

851

633

"""

852

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

853

name),

854

athing.__get__(self))

634

return ((prop.__get__(self)._dbus_name, prop.__get__(self))

855

635

for cls in self.__class__.__mro__

856

for name, athing in

857

inspect.getmembers(cls,

858

self._is_dbus_thing(thing)))

636

for name, prop in

637

inspect.getmembers(cls, self._is_dbus_property))

859

638

860

639

def _get_dbus_property(self, interface_name, property_name):

861

640

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

863

642

"""

864

643

for cls in self.__class__.__mro__:

865

644

for name, value in (inspect.getmembers

866

(cls,

867

self._is_dbus_thing("property"))):

645

(cls, self._is_dbus_property)):

868

646

if (value._dbus_name == property_name

869

647

and value._dbus_interface == interface_name):

870

648

return value.__get__(self)

899

677

# signatures other than "ay".

900

678

if prop._dbus_signature != "ay":

901

679

raise ValueError

902

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

903

for byte in value))

680

value = dbus.ByteArray(''.join(unichr(byte)

681

for byte in value))

904

682

prop(value)

905

683

906

684

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

911

689

912

690

Note: Will not include properties with access="write".

913

691

"""

914

properties = {}

915

for name, prop in self._get_all_dbus_things("property"):

692

all = {}

693

for name, prop in self._get_all_dbus_properties():

916

694

if (interface_name

917

695

and interface_name != prop._dbus_interface):

918

696

# Interface non-empty but did not match

922

700

continue

923

701

value = prop()

924

702

if not hasattr(value, "variant_level"):

925

properties[name] = value

703

all[name] = value

926

704

continue

927

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

928

value.variant_level+1)

929

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

705

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

706

value.variant_level+1)

707

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

930

708

931

709

@dbus.service.method(dbus.INTROSPECTABLE_IFACE,

932

710

out_signature="s",

933

711

path_keyword='object_path',

934

712

connection_keyword='connection')

935

713

def Introspect(self, object_path, connection):

936

"""Overloading of standard D-Bus method.

937

938

Inserts property tags and interface annotation tags.

714

"""Standard D-Bus method, overloaded to insert property tags.

939

715

"""

940

716

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

941

717

connection)

948

724

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

949

725

return e

950

726

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

951

# Add property tags

952

727

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

953

728

for name, prop

954

in self._get_all_dbus_things("property")

729

in self._get_all_dbus_properties()

955

730

if prop._dbus_interface

956

731

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

957

732

if_tag.appendChild(tag)

958

# Add annotation tags

959

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

960

for tag in if_tag.getElementsByTagName(typ):

961

annots = dict()

962

for name, prop in (self.

963

_get_all_dbus_things(typ)):

964

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

965

and prop._dbus_interface

966

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

967

annots.update(getattr

968

(prop,

969

"_dbus_annotations",

970

{}))

971

for name, value in annots.iteritems():

972

ann_tag = document.createElement(

973

"annotation")

974

ann_tag.setAttribute("name", name)

975

ann_tag.setAttribute("value", value)

976

tag.appendChild(ann_tag)

977

# Add interface annotation tags

978

for annotation, value in dict(

979

itertools.chain(

980

*(annotations().iteritems()

981

for name, annotations in

982

self._get_all_dbus_things("interface")

983

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

984

))).iteritems():

985

ann_tag = document.createElement("annotation")

986

ann_tag.setAttribute("name", annotation)

987

ann_tag.setAttribute("value", value)

988

if_tag.appendChild(ann_tag)

989

733

# Add the names to the return values for the

990

734

# "org.freedesktop.DBus.Properties" methods

991

735

if (if_tag.getAttribute("name")

1017

761

return dbus.String(dt.isoformat(),

1018

762

variant_level=variant_level)

1019

763

1020

1021

764

class AlternateDBusNamesMetaclass(DBusObjectWithProperties

1022

765

.__metaclass__):

1023

766

"""Applied to an empty subclass of a D-Bus object, this metaclass

1026

769

def __new__(mcs, name, bases, attr):

1027

770

# Go through all the base classes which could have D-Bus

1028

771

# methods, signals, or properties in them

1029

old_interface_names = []

1030

772

for base in (b for b in bases

1031

773

if issubclass(b, dbus.service.Object)):

1032

774

# Go though all attributes of the base class

1042

784

alt_interface = (attribute._dbus_interface

1043

785

.replace("se.recompile.Mandos",

1044

786

"se.bsnet.fukt.Mandos"))

1045

if alt_interface != attribute._dbus_interface:

1046

old_interface_names.append(alt_interface)

1047

787

# Is this a D-Bus signal?

1048

788

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

1049

789

# Extract the original non-method function by

1064

804

nonmethod_func.func_name,

1065

805

nonmethod_func.func_defaults,

1066

806

nonmethod_func.func_closure)))

1067

# Copy annotations, if any

1068

try:

1069

new_function._dbus_annotations = (

1070

dict(attribute._dbus_annotations))

1071

except AttributeError:

1072

pass

1073

807

# Define a creator of a function to call both the

1074

808

# old and new functions, so both the old and new

1075

809

# signals gets sent when the function is called

1103

837

attribute.func_name,

1104

838

attribute.func_defaults,

1105

839

attribute.func_closure)))

1106

# Copy annotations, if any

1107

try:

1108

attr[attrname]._dbus_annotations = (

1109

dict(attribute._dbus_annotations))

1110

except AttributeError:

1111

pass

1112

840

# Is this a D-Bus property?

1113

841

elif getattr(attribute, "_dbus_is_property", False):

1114

842

# Create a new, but exactly alike, function

1128

856

attribute.func_name,

1129

857

attribute.func_defaults,

1130

858

attribute.func_closure)))

1131

# Copy annotations, if any

1132

try:

1133

attr[attrname]._dbus_annotations = (

1134

dict(attribute._dbus_annotations))

1135

except AttributeError:

1136

pass

1137

# Is this a D-Bus interface?

1138

elif getattr(attribute, "_dbus_is_interface", False):

1139

# Create a new, but exactly alike, function

1140

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

1141

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

1142

# to the class.

1143

attr[attrname] = (dbus_interface_annotations

1144

(alt_interface)

1145

(types.FunctionType

1146

(attribute.func_code,

1147

attribute.func_globals,

1148

attribute.func_name,

1149

attribute.func_defaults,

1150

attribute.func_closure)))

1151

# Deprecate all old interfaces

1152

basename="_AlternateDBusNamesMetaclass_interface_annotation{0}"

1153

for old_interface_name in old_interface_names:

1154

@dbus_interface_annotations(old_interface_name)

1155

def func(self):

1156

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

1157

# Find an unused name

1158

for aname in (basename.format(i) for i in

1159

itertools.count()):

1160

if aname not in attr:

1161

attr[aname] = func

1162

break

1163

859

return type.__new__(mcs, name, bases, attr)

1164

860

1165

1166

861

class ClientDBus(Client, DBusObjectWithProperties):

1167

862

"""A Client class using D-Bus

1168

863

1177

872

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

1178

873

1179

874

def __init__(self, bus = None, *args, **kwargs):

875

self._approvals_pending = 0

1180

876

self.bus = bus

1181

877

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

1182

878

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

1194

890

variant_level=1):

1195

891

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

1196

892

its changes to DBus.

1197

1198

transform_fun: Function that takes a value and a variant_level

1199

and transforms it to a D-Bus type.

893

894

transform_fun: Function that takes a value and transforms it

895

to a D-Bus type.

1200

896

dbus_name: D-Bus name of the variable

1201

897

type_func: Function that transform the value before sending it

1202

898

to the D-Bus. Default: no transform

1203

899

variant_level: D-Bus variant level. Default: 1

1204

900

"""

1205

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

901

real_value = [None,]

1206

902

def setter(self, value):

903

old_value = real_value[0]

904

real_value[0] = value

1207

905

if hasattr(self, "dbus_object_path"):

1208

if (not hasattr(self, attrname) or

1209

type_func(getattr(self, attrname, None))

1210

!= type_func(value)):

1211

dbus_value = transform_func(type_func(value),

1212

variant_level

1213

=variant_level)

906

if type_func(old_value) != type_func(real_value[0]):

907

dbus_value = transform_func(type_func

908

(real_value[0]),

909

variant_level)

1214

910

self.PropertyChanged(dbus.String(dbus_name),

1215

911

dbus_value)

1216

setattr(self, attrname, value)

1217

912

1218

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

913

return property(lambda self: real_value[0], setter)

1219

914

1220

915

1221

916

expires = notifychangeproperty(datetime_to_dbus, "Expires")

1230

925

checker is not None)

1231

926

last_checked_ok = notifychangeproperty(datetime_to_dbus,

1232

927

"LastCheckedOK")

1233

last_checker_status = notifychangeproperty(dbus.Int16,

1234

"LastCheckerStatus")

1235

928

last_approval_request = notifychangeproperty(

1236

929

datetime_to_dbus, "LastApprovalRequest")

1237

930

approved_by_default = notifychangeproperty(dbus.Boolean,

1238

931

"ApprovedByDefault")

1239

approval_delay = notifychangeproperty(dbus.UInt64,

932

approval_delay = notifychangeproperty(dbus.UInt16,

1240

933

"ApprovalDelay",

1241

934

type_func =

1242

timedelta_to_milliseconds)

935

_timedelta_to_milliseconds)

1243

936

approval_duration = notifychangeproperty(

1244

dbus.UInt64, "ApprovalDuration",

1245

type_func = timedelta_to_milliseconds)

937

dbus.UInt16, "ApprovalDuration",

938

type_func = _timedelta_to_milliseconds)

1246

939

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

1247

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

940

timeout = notifychangeproperty(dbus.UInt16, "Timeout",

1248

941

type_func =

1249

timedelta_to_milliseconds)

942

_timedelta_to_milliseconds)

1250

943

extended_timeout = notifychangeproperty(

1251

dbus.UInt64, "ExtendedTimeout",

1252

type_func = timedelta_to_milliseconds)

1253

interval = notifychangeproperty(dbus.UInt64,

944

dbus.UInt16, "ExtendedTimeout",

945

type_func = _timedelta_to_milliseconds)

946

interval = notifychangeproperty(dbus.UInt16,

1254

947

"Interval",

1255

948

type_func =

1256

timedelta_to_milliseconds)

949

_timedelta_to_milliseconds)

1257

950

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

1258

951

1259

952

del notifychangeproperty

1301

994

return r

1302

995

1303

996

def _reset_approved(self):

1304

self.approved = None

997

self._approved = None

1305

998

return False

1306

999

1307

1000

def approve(self, value=True):

1308

1001

self.send_changedstate()

1309

self.approved = value

1310

gobject.timeout_add(timedelta_to_milliseconds

1002

self._approved = value

1003

gobject.timeout_add(_timedelta_to_milliseconds

1311

1004

(self.approval_duration),

1312

1005

self._reset_approved)

1313

1006

1315

1008

## D-Bus methods, signals & properties

1316

1009

_interface = "se.recompile.Mandos.Client"

1317

1010

1318

## Interfaces

1319

1320

@dbus_interface_annotations(_interface)

1321

def _foo(self):

1322

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

1323

"false"}

1324

1325

1011

## Signals

1326

1012

1327

1013

# CheckerCompleted - signal

1426

1112

access="readwrite")

1427

1113

def ApprovalDuration_dbus_property(self, value=None):

1428

1114

if value is None: # get

1429

return dbus.UInt64(timedelta_to_milliseconds(

1115

return dbus.UInt64(_timedelta_to_milliseconds(

1430

1116

self.approval_duration))

1431

1117

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

1432

1118

1446

1132

def Host_dbus_property(self, value=None):

1447

1133

if value is None: # get

1448

1134

return dbus.String(self.host)

1449

self.host = unicode(value)

1135

self.host = value

1450

1136

1451

1137

# Created - property

1452

1138

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

1453

1139

def Created_dbus_property(self):

1454

return datetime_to_dbus(self.created)

1140

return dbus.String(datetime_to_dbus(self.created))

1455

1141

1456

1142

# LastEnabled - property

1457

1143

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

1478

1164

return

1479

1165

return datetime_to_dbus(self.last_checked_ok)

1480

1166

1481

# LastCheckerStatus - property

1482

@dbus_service_property(_interface, signature="n",

1483

access="read")

1484

def LastCheckerStatus_dbus_property(self):

1485

return dbus.Int16(self.last_checker_status)

1486

1487

1167

# Expires - property

1488

1168

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

1489

1169

def Expires_dbus_property(self):

1501

1181

if value is None: # get

1502

1182

return dbus.UInt64(self.timeout_milliseconds())

1503

1183

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

1184

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

1185

return

1504

1186

# Reschedule timeout

1505

if self.enabled:

1506

now = datetime.datetime.utcnow()

1507

time_to_die = timedelta_to_milliseconds(

1508

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

1509

if time_to_die <= 0:

1510

# The timeout has passed

1511

self.disable()

1512

else:

1513

self.expires = (now +

1514

datetime.timedelta(milliseconds =

1515

time_to_die))

1516

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

1517

is None):

1518

return

1519

gobject.source_remove(self.disable_initiator_tag)

1520

self.disable_initiator_tag = (gobject.timeout_add

1521

(time_to_die,

1522

self.disable))

1187

gobject.source_remove(self.disable_initiator_tag)

1188

self.disable_initiator_tag = None

1189

self.expires = None

1190

time_to_die = (self.

1191

_timedelta_to_milliseconds((self

1192

.last_checked_ok

1193

+ self.timeout)

1194

- datetime.datetime

1195

.utcnow()))

1196

if time_to_die <= 0:

1197

# The timeout has passed

1198

self.disable()

1199

else:

1200

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

1201

+ datetime.timedelta(milliseconds =

1202

time_to_die))

1203

self.disable_initiator_tag = (gobject.timeout_add

1204

(time_to_die, self.disable))

1523

1205

1524

1206

# ExtendedTimeout - property

1525

1207

@dbus_service_property(_interface, signature="t",

1538

1220

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

1539

1221

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

1540

1222

return

1541

if self.enabled:

1542

# Reschedule checker run

1543

gobject.source_remove(self.checker_initiator_tag)

1544

self.checker_initiator_tag = (gobject.timeout_add

1545

(value, self.start_checker))

1546

self.start_checker() # Start one now, too

1223

# Reschedule checker run

1224

gobject.source_remove(self.checker_initiator_tag)

1225

self.checker_initiator_tag = (gobject.timeout_add

1226

(value, self.start_checker))

1227

self.start_checker() # Start one now, too

1547

1228

1548

1229

# Checker - property

1549

1230

@dbus_service_property(_interface, signature="s",

1551

1232

def Checker_dbus_property(self, value=None):

1552

1233

if value is None: # get

1553

1234

return dbus.String(self.checker_command)

1554

self.checker_command = unicode(value)

1235

self.checker_command = value

1555

1236

1556

1237

# CheckerRunning - property

1557

1238

@dbus_service_property(_interface, signature="b",

1586

1267

raise KeyError()

1587

1268

1588

1269

def __getattribute__(self, name):

1589

if name == '_pipe':

1270

if(name == '_pipe'):

1590

1271

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

1591

1272

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

1592

1273

data = self._pipe.recv()

1599

1280

return func

1600

1281

1601

1282

def __setattr__(self, name, value):

1602

if name == '_pipe':

1283

if(name == '_pipe'):

1603

1284

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

1604

1285

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

1605

1286

1606

1607

1287

class ClientDBusTransitional(ClientDBus):

1608

1288

__metaclass__ = AlternateDBusNamesMetaclass

1609

1289

1610

1611

1290

class ClientHandler(socketserver.BaseRequestHandler, object):

1612

1291

"""A class to handle client connections.

1613

1292

1695

1374

client.Rejected("Disabled")

1696

1375

return

1697

1376

1698

if client.approved or not client.approval_delay:

1377

if client._approved or not client.approval_delay:

1699

1378

#We are approved or approval is disabled

1700

1379

break

1701

elif client.approved is None:

1380

elif client._approved is None:

1702

1381

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

1703

1382

client.name)

1704

1383

if self.server.use_dbus:

1715

1394

return

1716

1395

1717

1396

#wait until timeout or approved

1397

#x = float(client

1398

# ._timedelta_to_milliseconds(delay))

1718

1399

time = datetime.datetime.now()

1719

1400

client.changedstate.acquire()

1720

1401

(client.changedstate.wait

1721

(float(client.timedelta_to_milliseconds(delay)

1402

(float(client._timedelta_to_milliseconds(delay)

1722

1403

/ 1000)))

1723

1404

client.changedstate.release()

1724

1405

time2 = datetime.datetime.now()

1749

1430

sent_size += sent

1750

1431

1751

1432

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

1752

# bump the timeout using extended_timeout

1753

client.bump_timeout(client.extended_timeout)

1433

# bump the timeout as if seen

1434

client.checked_ok(client.extended_timeout)

1754

1435

if self.server.use_dbus:

1755

1436

# Emit D-Bus signal

1756

1437

client.GotSecret()

1823

1504

# Convert the buffer to a Python bytestring

1824

1505

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

1825

1506

# Convert the bytestring to hexadecimal notation

1826

hex_fpr = binascii.hexlify(fpr).upper()

1507

hex_fpr = ''.join("%02X" % ord(char) for char in fpr)

1827

1508

return hex_fpr

1828

1509

1829

1510

1832

1513

def sub_process_main(self, request, address):

1833

1514

try:

1834

1515

self.finish_request(request, address)

1835

except Exception:

1516

except:

1836

1517

self.handle_error(request, address)

1837

1518

self.close_request(request)

1838

1519

1839

1520

def process_request(self, request, address):

1840

1521

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

1841

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

1842

args = (request,

1843

address))

1844

proc.start()

1845

return proc

1522

multiprocessing.Process(target = self.sub_process_main,

1523

args = (request, address)).start()

1846

1524

1847

1525

1848

1526

class MultiprocessingMixInWithPipe(MultiprocessingMixIn, object):

1854

1532

"""

1855

1533

parent_pipe, self.child_pipe = multiprocessing.Pipe()

1856

1534

1857

proc = MultiprocessingMixIn.process_request(self, request,

1858

client_address)

1535

super(MultiprocessingMixInWithPipe,

1536

self).process_request(request, client_address)

1859

1537

self.child_pipe.close()

1860

self.add_pipe(parent_pipe, proc)

1538

self.add_pipe(parent_pipe)

1861

1539

1862

def add_pipe(self, parent_pipe, proc):

1540

def add_pipe(self, parent_pipe):

1863

1541

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

1864

1542

raise NotImplementedError

1865

1543

1943

1621

self.enabled = False

1944

1622

self.clients = clients

1945

1623

if self.clients is None:

1946

self.clients = {}

1624

self.clients = set()

1947

1625

self.use_dbus = use_dbus

1948

1626

self.gnutls_priority = gnutls_priority

1949

1627

IPv6_TCPServer.__init__(self, server_address,

1953

1631

def server_activate(self):

1954

1632

if self.enabled:

1955

1633

return socketserver.TCPServer.server_activate(self)

1956

1957

1634

def enable(self):

1958

1635

self.enabled = True

1959

1960

def add_pipe(self, parent_pipe, proc):

1636

def add_pipe(self, parent_pipe):

1961

1637

# Call "handle_ipc" for both data and EOF events

1962

1638

gobject.io_add_watch(parent_pipe.fileno(),

1963

1639

gobject.IO_IN | gobject.IO_HUP,

1964

1640

functools.partial(self.handle_ipc,

1965

1641

parent_pipe =

1966

parent_pipe,

1967

proc = proc))

1968

1642

parent_pipe))

1643

1969

1644

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

1970

proc = None, client_object=None):

1645

client_object=None):

1971

1646

condition_names = {

1972

1647

gobject.IO_IN: "IN", # There is data to read.

1973

1648

gobject.IO_OUT: "OUT", # Data can be written (without

1982

1657

for cond, name in

1983

1658

condition_names.iteritems()

1984

1659

if cond & condition)

1985

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

1660

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

1986

1661

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

1987

# Wait for other process to exit

1988

proc.join()

1989

1662

return False

1990

1663

1991

1664

# Read a request from the child

1996

1669

fpr = request[1]

1997

1670

address = request[2]

1998

1671

1999

for c in self.clients.itervalues():

1672

for c in self.clients:

2000

1673

if c.fingerprint == fpr:

2001

1674

client = c

2002

1675

break

2015

1688

functools.partial(self.handle_ipc,

2016

1689

parent_pipe =

2017

1690

parent_pipe,

2018

proc = proc,

2019

1691

client_object =

2020

1692

client))

2021

1693

parent_pipe.send(True)

2086

1758

return timevalue

2087

1759

2088

1760

1761

def if_nametoindex(interface):

1762

"""Call the C function if_nametoindex(), or equivalent

1763

1764

Note: This function cannot accept a unicode string."""

1765

global if_nametoindex

1766

try:

1767

if_nametoindex = (ctypes.cdll.LoadLibrary

1768

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

1769

.if_nametoindex)

1770

except (OSError, AttributeError):

1771

logger.warning("Doing if_nametoindex the hard way")

1772

def if_nametoindex(interface):

1773

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

1774

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

1775

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

1776

ifreq = fcntl.ioctl(s, SIOCGIFINDEX,

1777

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

1778

interface))

1779

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

1780

ifreq[16:20])[0]

1781

return interface_index

1782

return if_nametoindex(interface)

1783

1784

2089

1785

def daemon(nochdir = False, noclose = False):

2090

1786

"""See daemon(3). Standard BSD Unix function.

2091

1787

2099

1795

sys.exit()

2100

1796

if not noclose:

2101

1797

# Close all standard open file descriptors

2102

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

1798

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

2103

1799

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

2104

1800

raise OSError(errno.ENODEV,

2105

1801

"%s not a character device"

2106

% os.devnull)

1802

% os.path.devnull)

2107

1803

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

2108

1804

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

2109

1805

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

2146

1842

" system bus interface")

2147

1843

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

2148

1844

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

2149

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

2150

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

2151

" state")

2152

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

2153

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

2154

2155

1845

options = parser.parse_args()

2156

1846

2157

1847

if options.check:

2170

1860

"use_dbus": "True",

2171

1861

"use_ipv6": "True",

2172

1862

"debuglevel": "",

2173

"restore": "True",

2174

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

2175

1863

}

2176

1864

2177

1865

# Parse config file for server-global settings

2194

1882

# options, if set.

2195

1883

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

2196

1884

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

2197

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

2198

"statedir"):

1885

"use_dbus", "use_ipv6", "debuglevel"):

2199

1886

value = getattr(options, option)

2200

1887

if value is not None:

2201

1888

server_settings[option] = value

2213

1900

debuglevel = server_settings["debuglevel"]

2214

1901

use_dbus = server_settings["use_dbus"]

2215

1902

use_ipv6 = server_settings["use_ipv6"]

2216

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

2217

stored_state_file)

2218

2219

if debug:

2220

initlogger(debug, logging.DEBUG)

2221

else:

2222

if not debuglevel:

2223

initlogger(debug)

2224

else:

2225

level = getattr(logging, debuglevel.upper())

2226

initlogger(debug, level)

2227

1903

2228

1904

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

2229

1905

syslogger.setFormatter(logging.Formatter

2232

1908

% server_settings["servicename"]))

2233

1909

2234

1910

# Parse config file with clients

2235

client_config = configparser.SafeConfigParser(Client

2236

.client_defaults)

1911

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

1912

"extended_timeout": "15m",

1913

"interval": "2m",

1914

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

1915

"host": "",

1916

"approval_delay": "0s",

1917

"approval_duration": "1s",

1918

}

1919

client_config = configparser.SafeConfigParser(client_defaults)

2237

1920

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

2238

1921

"clients.conf"))

2239

1922

2277

1960

if error[0] != errno.EPERM:

2278

1961

raise error

2279

1962

1963

if not debug and not debuglevel:

1964

syslogger.setLevel(logging.WARNING)

1965

console.setLevel(logging.WARNING)

1966

if debuglevel:

1967

level = getattr(logging, debuglevel.upper())

1968

syslogger.setLevel(level)

1969

console.setLevel(level)

1970

2280

1971

if debug:

2281

1972

# Enable all possible GnuTLS debugging

2282

1973

2292

1983

.gnutls_global_set_log_function(debug_gnutls))

2293

1984

2294

1985

# Redirect stdin so all checkers get /dev/null

2295

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

1986

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

2296

1987

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

2297

1988

if null > 2:

2298

1989

os.close(null)

1990

else:

1991

# No console logging

1992

logger.removeHandler(console)

2299

1993

2300

1994

# Need to fork before connecting to D-Bus

2301

1995

if not debug:

2302

1996

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

2303

1997

daemon()

2304

1998

2305

gobject.threads_init()

2306

2307

1999

global main_loop

2308

2000

# From the Avahi example code

2309

DBusGMainLoop(set_as_default=True)

2001

DBusGMainLoop(set_as_default=True )

2310

2002

main_loop = gobject.MainLoop()

2311

2003

bus = dbus.SystemBus()

2312

2004

# End of Avahi example code

2323

2015

server_settings["use_dbus"] = False

2324

2016

tcp_server.use_dbus = False

2325

2017

protocol = avahi.PROTO_INET6 if use_ipv6 else avahi.PROTO_INET

2326

service = AvahiServiceToSyslog(name =

2327

server_settings["servicename"],

2328

servicetype = "_mandos._tcp",

2329

protocol = protocol, bus = bus)

2018

service = AvahiService(name = server_settings["servicename"],

2019

servicetype = "_mandos._tcp",

2020

protocol = protocol, bus = bus)

2330

2021

if server_settings["interface"]:

2331

2022

service.interface = (if_nametoindex

2332

2023

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

2338

2029

if use_dbus:

2339

2030

client_class = functools.partial(ClientDBusTransitional,

2340

2031

bus = bus)

2341

2342

client_settings = Client.config_parser(client_config)

2343

old_client_settings = {}

2344

clients_data = {}

2345

2346

# Get client data and settings from last running state.

2347

if server_settings["restore"]:

2348

try:

2349

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

2350

clients_data, old_client_settings = (pickle.load

2351

(stored_state))

2352

os.remove(stored_state_path)

2353

except IOError as e:

2354

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

2355

.format(e))

2356

if e.errno != errno.ENOENT:

2357

raise

2358

except EOFError as e:

2359

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

2360

"EOFError: {0}".format(e))

2361

2362

with PGPEngine() as pgp:

2363

for client_name, client in clients_data.iteritems():

2364

# Decide which value to use after restoring saved state.

2365

# We have three different values: Old config file,

2366

# new config file, and saved state.

2367

# New config value takes precedence if it differs from old

2368

# config value, otherwise use saved state.

2369

for name, value in client_settings[client_name].items():

2370

try:

2371

# For each value in new config, check if it

2372

# differs from the old config value (Except for

2373

# the "secret" attribute)

2374

if (name != "secret" and

2375

value != old_client_settings[client_name]

2376

[name]):

2377

client[name] = value

2378

except KeyError:

2379

pass

2380

2381

# Clients who has passed its expire date can still be

2382

# enabled if its last checker was successful. Clients

2383

# whose checker succeeded before we stored its state is

2384

# assumed to have successfully run all checkers during

2385

# downtime.

2386

if client["enabled"]:

2387

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

2388

if not client["last_checked_ok"]:

2389

logger.warning(

2390

"disabling client {0} - Client never "

2391

"performed a successful checker"

2392

.format(client_name))

2393

client["enabled"] = False

2394

elif client["last_checker_status"] != 0:

2395

logger.warning(

2396

"disabling client {0} - Client "

2397

"last checker failed with error code {1}"

2398

.format(client_name,

2399

client["last_checker_status"]))

2400

client["enabled"] = False

2401

else:

2402

client["expires"] = (datetime.datetime

2403

.utcnow()

2404

+ client["timeout"])

2405

logger.debug("Last checker succeeded,"

2406

" keeping {0} enabled"

2407

.format(client_name))

2032

def client_config_items(config, section):

2033

special_settings = {

2034

"approved_by_default":

2035

lambda: config.getboolean(section,

2036

"approved_by_default"),

2037

}

2038

for name, value in config.items(section):

2408

2039

try:

2409

client["secret"] = (

2410

pgp.decrypt(client["encrypted_secret"],

2411

client_settings[client_name]

2412

["secret"]))

2413

except PGPError:

2414

# If decryption fails, we use secret from new settings

2415

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

2416

.format(client_name))

2417

client["secret"] = (

2418

client_settings[client_name]["secret"])

2419

2420

2421

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

2422

for client_name in (set(old_client_settings)

2423

- set(client_settings)):

2424

del clients_data[client_name]

2425

for client_name in (set(client_settings)

2426

- set(old_client_settings)):

2427

clients_data[client_name] = client_settings[client_name]

2428

2429

# Create all client objects

2430

for client_name, client in clients_data.iteritems():

2431

tcp_server.clients[client_name] = client_class(

2432

name = client_name, settings = client)

2433

2040

yield (name, special_settings[name]())

2041

except KeyError:

2042

yield (name, value)

2043

2044

tcp_server.clients.update(set(

2045

client_class(name = section,

2046

config= dict(client_config_items(

2047

client_config, section)))

2048

for section in client_config.sections()))

2434

2049

if not tcp_server.clients:

2435

2050

logger.warning("No clients defined")

2436

2051

2447

2062

# "pidfile" was never created

2448

2063

pass

2449

2064

del pidfilename

2065

2450

2066

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

2451

2067

2452

2068

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

2453

2069

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

2454

2070

2455

2071

if use_dbus:

2456

class MandosDBusService(DBusObjectWithProperties):

2072

class MandosDBusService(dbus.service.Object):

2457

2073

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

2458

2074

def __init__(self):

2459

2075

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

2460

2076

_interface = "se.recompile.Mandos"

2461

2077

2462

@dbus_interface_annotations(_interface)

2463

def _foo(self):

2464

return { "org.freedesktop.DBus.Property"

2465

".EmitsChangedSignal":

2466

"false"}

2467

2468

2078

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

2469

2079

def ClientAdded(self, objpath):

2470

2080

"D-Bus signal"

2484

2094

def GetAllClients(self):

2485

2095

"D-Bus method"

2486

2096

return dbus.Array(c.dbus_object_path

2487

for c in

2488

tcp_server.clients.itervalues())

2097

for c in tcp_server.clients)

2489

2098

2490

2099

@dbus.service.method(_interface,

2491

2100

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

2493

2102

"D-Bus method"

2494

2103

return dbus.Dictionary(

2495

2104

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

2496

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

2105

for c in tcp_server.clients),

2497

2106

signature="oa{sv}")

2498

2107

2499

2108

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

2500

2109

def RemoveClient(self, object_path):

2501

2110

"D-Bus method"

2502

for c in tcp_server.clients.itervalues():

2111

for c in tcp_server.clients:

2503

2112

if c.dbus_object_path == object_path:

2504

del tcp_server.clients[c.name]

2113

tcp_server.clients.remove(c)

2505

2114

c.remove_from_connection()

2506

2115

# Don't signal anything except ClientRemoved

2507

2116

c.disable(quiet=True)

2520

2129

"Cleanup function; run on exit"

2521

2130

service.cleanup()

2522

2131

2523

multiprocessing.active_children()

2524

if not (tcp_server.clients or client_settings):

2525

return

2526

2527

# Store client before exiting. Secrets are encrypted with key

2528

# based on what config file has. If config file is

2529

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

2530

clients = {}

2531

with PGPEngine() as pgp:

2532

for client in tcp_server.clients.itervalues():

2533

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

2534

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

2535

key)

2536

client_dict = {}

2537

2538

# A list of attributes that can not be pickled

2539

# + secret.

2540

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

2541

"checker"))

2542

for name, typ in (inspect.getmembers

2543

(dbus.service.Object)):

2544

exclude.add(name)

2545

2546

client_dict["encrypted_secret"] = (client

2547

.encrypted_secret)

2548

for attr in client.client_structure:

2549

if attr not in exclude:

2550

client_dict[attr] = getattr(client, attr)

2551

2552

clients[client.name] = client_dict

2553

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

2554

2555

try:

2556

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

2557

prefix="clients-",

2558

dir=os.path.dirname

2559

(stored_state_path))

2560

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

2561

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

2562

os.rename(tempname, stored_state_path)

2563

except (IOError, OSError) as e:

2564

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

2565

.format(e))

2566

if not debug:

2567

try:

2568

os.remove(tempname)

2569

except NameError:

2570

pass

2571

if e.errno not in set((errno.ENOENT, errno.EACCES,

2572

errno.EEXIST)):

2573

raise e

2574

2575

# Delete all clients, and settings from config

2576

2132

while tcp_server.clients:

2577

name, client = tcp_server.clients.popitem()

2133

client = tcp_server.clients.pop()

2578

2134

if use_dbus:

2579

2135

client.remove_from_connection()

2136

client.disable_hook = None

2580

2137

# Don't signal anything except ClientRemoved

2581

2138

client.disable(quiet=True)

2582

2139

if use_dbus:

2584

2141

mandos_dbus_service.ClientRemoved(client

2585

2142

.dbus_object_path,

2586

2143

client.name)

2587

client_settings.clear()

2588

2144

2589

2145

atexit.register(cleanup)

2590

2146

2591

for client in tcp_server.clients.itervalues():

2147

for client in tcp_server.clients:

2592

2148

if use_dbus:

2593

2149

# Emit D-Bus signal

2594

2150

mandos_dbus_service.ClientAdded(client.dbus_object_path)

2595

# Need to initiate checking of clients

2596

if client.enabled:

2597

client.init_checker()

2151

client.enable()

2598

2152

2599

2153

tcp_server.enable()

2600

2154

tcp_server.server_activate()

2640

2194

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

2641

2195

cleanup()

2642

2196

2197

2643

2198

if __name__ == '__main__':

2644

2199

main()