/mandos/trunk : revision 493

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# along with this program. If not, see

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# <http://www.gnu.org/licenses/>.

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#

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

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# Contact the authors at <mandos@fukt.bsnet.se>.

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#

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from __future__ import (division, absolute_import, print_function,

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import functools

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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 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 = "1.4.1"

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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) 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) 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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" 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 = unicode(self.server.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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"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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388

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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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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, or None.

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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 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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"""

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runtime_expansions = ("approval_delay", "approval_duration",

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

433

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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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@staticmethod

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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))

445

314

446

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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)

449

450

def extended_timeout_milliseconds(self):

451

"Return the 'extended_timeout' attribute in milliseconds"

452

return timedelta_to_milliseconds(self.extended_timeout)

317

return self._timedelta_to_milliseconds(self.timeout)

453

318

454

319

def interval_milliseconds(self):

455

320

"Return the 'interval' attribute in milliseconds"

456

return timedelta_to_milliseconds(self.interval)

457

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return self._timedelta_to_milliseconds(self.interval)

322

458

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def approval_delay_milliseconds(self):

459

return timedelta_to_milliseconds(self.approval_delay)

460

461

@staticmethod

462

def config_parser(config):

463

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

464

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

465

with exceptions for any special settings as defined above"""

466

settings = {}

467

for client_name in config.sections():

468

section = dict(config.items(client_name))

469

client = settings[client_name] = {}

470

471

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

472

# Reformat values from string types to Python types

473

client["approved_by_default"] = config.getboolean(

474

client_name, "approved_by_default")

475

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

476

477

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

478

.replace(" ", ""))

479

if "secret" in section:

480

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

481

elif "secfile" in section:

482

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

483

(section["secfile"])),

484

"rb") as secfile:

485

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

486

else:

487

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

488

% section)

489

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

490

client["extended_timeout"] = string_to_delta(

491

section["extended_timeout"])

492

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

493

client["approval_delay"] = string_to_delta(

494

section["approval_delay"])

495

client["approval_duration"] = string_to_delta(

496

section["approval_duration"])

497

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

498

client["last_approval_request"] = None

499

client["last_checked_ok"] = None

500

client["last_checker_status"] = None

501

if client["enabled"]:

502

client["last_enabled"] = datetime.datetime.utcnow()

503

client["expires"] = (datetime.datetime.utcnow()

504

+ client["timeout"])

505

else:

506

client["last_enabled"] = None

507

client["expires"] = None

508

509

return settings

510

511

512

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

324

return self._timedelta_to_milliseconds(self.approval_delay)

325

326

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

513

327

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

514

328

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

515

329

attribute."""

516

330

self.name = name

517

# adding all client settings

518

for setting, value in settings.iteritems():

519

setattr(self, setting, value)

520

331

if config is None:

332

config = {}

521

333

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

522

334

# Uppercase and remove spaces from fingerprint for later

523

335

# comparison purposes with return value from the fingerprint()

524

336

# function

337

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

338

.replace(" ", ""))

525

339

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

526

self.created = settings.get("created", datetime.datetime.utcnow())

527

528

# attributes specific for this server instance

340

if "secret" in config:

341

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

342

elif "secfile" in config:

343

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

344

(config["secfile"])),

345

"rb") as secfile:

346

self.secret = secfile.read()

347

else:

348

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

349

% self.name)

350

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

351

self.created = datetime.datetime.utcnow()

352

self.enabled = False

353

self.last_approval_request = None

354

self.last_enabled = None

355

self.last_checked_ok = None

356

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

357

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

358

self.disable_hook = disable_hook

529

359

self.checker = None

530

360

self.checker_initiator_tag = None

531

361

self.disable_initiator_tag = None

532

362

self.checker_callback_tag = None

363

self.checker_command = config["checker"]

533

364

self.current_checker_command = None

534

self.approved = None

365

self.last_connect = None

366

self._approved = None

367

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

368

True)

535

369

self.approvals_pending = 0

536

self.changedstate = (multiprocessing_manager

537

.Condition(multiprocessing_manager

538

.Lock()))

539

self.client_structure = [attr for attr in

540

self.__dict__.iterkeys()

541

if not attr.startswith("_")]

542

self.client_structure.append("client_structure")

543

544

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

545

lambda obj:

546

isinstance(obj,

547

property)):

548

if not name.startswith("_"):

549

self.client_structure.append(name)

370

self.approval_delay = string_to_delta(

371

config["approval_delay"])

372

self.approval_duration = string_to_delta(

373

config["approval_duration"])

374

self.changedstate = multiprocessing_manager.Condition(multiprocessing_manager.Lock())

550

375

551

# Send notice to process children that client state has changed

552

376

def send_changedstate(self):

553

with self.changedstate:

554

self.changedstate.notify_all()

555

377

self.changedstate.acquire()

378

self.changedstate.notify_all()

379

self.changedstate.release()

380

556

381

def enable(self):

557

382

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

558

383

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

559

384

# Already enabled

560

385

return

561

386

self.send_changedstate()

562

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

563

self.enabled = True

564

387

self.last_enabled = datetime.datetime.utcnow()

565

self.init_checker()

388

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

389

# and every interval from then on.

390

self.checker_initiator_tag = (gobject.timeout_add

391

(self.interval_milliseconds(),

392

self.start_checker))

393

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

394

self.disable_initiator_tag = (gobject.timeout_add

395

(self.timeout_milliseconds(),

396

self.disable))

397

self.enabled = True

398

# Also start a new checker *right now*.

399

self.start_checker()

566

400

567

401

def disable(self, quiet=True):

568

402

"""Disable this client."""

575

409

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

576

410

gobject.source_remove(self.disable_initiator_tag)

577

411

self.disable_initiator_tag = None

578

self.expires = None

579

412

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

580

413

gobject.source_remove(self.checker_initiator_tag)

581

414

self.checker_initiator_tag = None

582

415

self.stop_checker()

416

if self.disable_hook:

417

self.disable_hook(self)

583

418

self.enabled = False

584

419

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

585

420

return False

586

421

587

422

def __del__(self):

423

self.disable_hook = None

588

424

self.disable()

589

425

590

def init_checker(self):

591

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

592

# and every interval from then on.

593

self.checker_initiator_tag = (gobject.timeout_add

594

(self.interval_milliseconds(),

595

self.start_checker))

596

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

597

self.disable_initiator_tag = (gobject.timeout_add

598

(self.timeout_milliseconds(),

599

self.disable))

600

# Also start a new checker *right now*.

601

self.start_checker()

602

603

426

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

604

427

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

605

428

self.checker_callback_tag = None

606

429

self.checker = None

607

430

if os.WIFEXITED(condition):

608

self.last_checker_status = os.WEXITSTATUS(condition)

609

if self.last_checker_status == 0:

431

exitstatus = os.WEXITSTATUS(condition)

432

if exitstatus == 0:

610

433

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

611

434

vars(self))

612

435

self.checked_ok()

614

437

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

615

438

vars(self))

616

439

else:

617

self.last_checker_status = -1

618

440

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

619

441

vars(self))

620

442

621

def checked_ok(self, timeout=None):

443

def checked_ok(self):

622

444

"""Bump up the timeout for this client.

623

445

624

446

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

625

447

alive and well.

626

448

"""

627

if timeout is None:

628

timeout = self.timeout

629

449

self.last_checked_ok = datetime.datetime.utcnow()

630

if self.disable_initiator_tag is not None:

631

gobject.source_remove(self.disable_initiator_tag)

632

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

633

self.disable_initiator_tag = (gobject.timeout_add

634

(timedelta_to_milliseconds

635

(timeout), self.disable))

636

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

450

gobject.source_remove(self.disable_initiator_tag)

451

self.disable_initiator_tag = (gobject.timeout_add

452

(self.timeout_milliseconds(),

453

self.disable))

637

454

638

455

def need_approval(self):

639

456

self.last_approval_request = datetime.datetime.utcnow()

679

496

'replace')))

680

497

for attr in

681

498

self.runtime_expansions)

682

499

683

500

try:

684

501

command = self.checker_command % escaped_attrs

685

502

except TypeError as error:

731

548

raise

732

549

self.checker = None

733

550

734

735

551

def dbus_service_property(dbus_interface, signature="v",

736

552

access="readwrite", byte_arrays=False):

737

553

"""Decorators for marking methods of a DBusObjectWithProperties to

783

599

784

600

class DBusObjectWithProperties(dbus.service.Object):

785

601

"""A D-Bus object with properties.

786

602

787

603

Classes inheriting from this can use the dbus_service_property

788

604

decorator to expose methods as D-Bus properties. It exposes the

789

605

standard Get(), Set(), and GetAll() methods on the D-Bus.

796

612

def _get_all_dbus_properties(self):

797

613

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

798

614

"""

799

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

800

for cls in self.__class__.__mro__

615

return ((prop._dbus_name, prop)

801

616

for name, prop in

802

inspect.getmembers(cls, self._is_dbus_property))

617

inspect.getmembers(self, self._is_dbus_property))

803

618

804

619

def _get_dbus_property(self, interface_name, property_name):

805

620

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

806

621

property with the specified name and interface.

807

622

"""

808

for cls in self.__class__.__mro__:

809

for name, value in (inspect.getmembers

810

(cls, self._is_dbus_property)):

811

if (value._dbus_name == property_name

812

and value._dbus_interface == interface_name):

813

return value.__get__(self)

814

623

for name in (property_name,

624

property_name + "_dbus_property"):

625

prop = getattr(self, name, None)

626

if (prop is None

627

or not self._is_dbus_property(prop)

628

or prop._dbus_name != property_name

629

or (interface_name and prop._dbus_interface

630

and interface_name != prop._dbus_interface)):

631

continue

632

return prop

815

633

# No such property

816

634

raise DBusPropertyNotFound(self.dbus_object_path + ":"

817

635

+ interface_name + "."

851

669

def GetAll(self, interface_name):

852

670

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

853

671

standard.

854

672

855

673

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

856

674

"""

857

properties = {}

675

all = {}

858

676

for name, prop in self._get_all_dbus_properties():

859

677

if (interface_name

860

678

and interface_name != prop._dbus_interface):

865

683

continue

866

684

value = prop()

867

685

if not hasattr(value, "variant_level"):

868

properties[name] = value

686

all[name] = value

869

687

continue

870

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

871

value.variant_level+1)

872

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

688

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

689

value.variant_level+1)

690

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

873

691

874

692

@dbus.service.method(dbus.INTROSPECTABLE_IFACE,

875

693

out_signature="s",

919

737

return xmlstring

920

738

921

739

922

def datetime_to_dbus (dt, variant_level=0):

923

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

924

if dt is None:

925

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

926

return dbus.String(dt.isoformat(),

927

variant_level=variant_level)

928

929

930

class AlternateDBusNamesMetaclass(DBusObjectWithProperties

931

.__metaclass__):

932

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

933

will add additional D-Bus attributes matching a certain pattern.

934

"""

935

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

936

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

937

# methods, signals, or properties in them

938

for base in (b for b in bases

939

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

940

# Go though all attributes of the base class

941

for attrname, attribute in inspect.getmembers(base):

942

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

943

# with the wrong interface name

944

if (not hasattr(attribute, "_dbus_interface")

945

or not attribute._dbus_interface

946

.startswith("se.recompile.Mandos")):

947

continue

948

# Create an alternate D-Bus interface name based on

949

# the current name

950

alt_interface = (attribute._dbus_interface

951

.replace("se.recompile.Mandos",

952

"se.bsnet.fukt.Mandos"))

953

# Is this a D-Bus signal?

954

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

955

# Extract the original non-method function by

956

# black magic

957

nonmethod_func = (dict(

958

zip(attribute.func_code.co_freevars,

959

attribute.__closure__))["func"]

960

.cell_contents)

961

# Create a new, but exactly alike, function

962

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

963

# with the alternate D-Bus interface name

964

new_function = (dbus.service.signal

965

(alt_interface,

966

attribute._dbus_signature)

967

(types.FunctionType(

968

nonmethod_func.func_code,

969

nonmethod_func.func_globals,

970

nonmethod_func.func_name,

971

nonmethod_func.func_defaults,

972

nonmethod_func.func_closure)))

973

# Define a creator of a function to call both the

974

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

975

# signals gets sent when the function is called

976

def fixscope(func1, func2):

977

"""This function is a scope container to pass

978

func1 and func2 to the "call_both" function

979

outside of its arguments"""

980

def call_both(*args, **kwargs):

981

"""This function will emit two D-Bus

982

signals by calling func1 and func2"""

983

func1(*args, **kwargs)

984

func2(*args, **kwargs)

985

return call_both

986

# Create the "call_both" function and add it to

987

# the class

988

attr[attrname] = fixscope(attribute,

989

new_function)

990

# Is this a D-Bus method?

991

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

992

# Create a new, but exactly alike, function

993

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

994

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

995

# to the class.

996

attr[attrname] = (dbus.service.method

997

(alt_interface,

998

attribute._dbus_in_signature,

999

attribute._dbus_out_signature)

1000

(types.FunctionType

1001

(attribute.func_code,

1002

attribute.func_globals,

1003

attribute.func_name,

1004

attribute.func_defaults,

1005

attribute.func_closure)))

1006

# Is this a D-Bus property?

1007

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

1008

# Create a new, but exactly alike, function

1009

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

1010

# property with the alternate D-Bus interface

1011

# name. Add it to the class.

1012

attr[attrname] = (dbus_service_property

1013

(alt_interface,

1014

attribute._dbus_signature,

1015

attribute._dbus_access,

1016

attribute

1017

._dbus_get_args_options

1018

["byte_arrays"])

1019

(types.FunctionType

1020

(attribute.func_code,

1021

attribute.func_globals,

1022

attribute.func_name,

1023

attribute.func_defaults,

1024

attribute.func_closure)))

1025

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

1026

1027

1028

740

class ClientDBus(Client, DBusObjectWithProperties):

1029

741

"""A Client class using D-Bus

1030

742

1039

751

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

1040

752

1041

753

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

754

self._approvals_pending = 0

1042

755

self.bus = bus

1043

756

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

1044

self._approvals_pending = 0

1045

1046

self._approvals_pending = 0

1047

757

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

1048

758

# the D-Bus

1049

759

client_object_name = unicode(self.name).translate(

1054

764

DBusObjectWithProperties.__init__(self, self.bus,

1055

765

self.dbus_object_path)

1056

766

1057

def notifychangeproperty(transform_func,

1058

dbus_name, type_func=lambda x: x,

1059

variant_level=1):

1060

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

1061

its changes to DBus.

1062

1063

transform_fun: Function that takes a value and a variant_level

1064

and transforms it to a D-Bus type.

1065

dbus_name: D-Bus name of the variable

1066

type_func: Function that transform the value before sending it

1067

to the D-Bus. Default: no transform

1068

variant_level: D-Bus variant level. Default: 1

1069

"""

1070

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

1071

def setter(self, value):

1072

if hasattr(self, "dbus_object_path"):

1073

if (not hasattr(self, attrname) or

1074

type_func(getattr(self, attrname, None))

1075

!= type_func(value)):

1076

dbus_value = transform_func(type_func(value),

1077

variant_level

1078

=variant_level)

1079

self.PropertyChanged(dbus.String(dbus_name),

1080

dbus_value)

1081

setattr(self, attrname, value)

1082

1083

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

1084

1085

1086

expires = notifychangeproperty(datetime_to_dbus, "Expires")

1087

approvals_pending = notifychangeproperty(dbus.Boolean,

1088

"ApprovalPending",

1089

type_func = bool)

1090

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

1091

last_enabled = notifychangeproperty(datetime_to_dbus,

1092

"LastEnabled")

1093

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

1094

type_func = lambda checker:

1095

checker is not None)

1096

last_checked_ok = notifychangeproperty(datetime_to_dbus,

1097

"LastCheckedOK")

1098

last_approval_request = notifychangeproperty(

1099

datetime_to_dbus, "LastApprovalRequest")

1100

approved_by_default = notifychangeproperty(dbus.Boolean,

1101

"ApprovedByDefault")

1102

approval_delay = notifychangeproperty(dbus.UInt64,

1103

"ApprovalDelay",

1104

type_func =

1105

timedelta_to_milliseconds)

1106

approval_duration = notifychangeproperty(

1107

dbus.UInt64, "ApprovalDuration",

1108

type_func = timedelta_to_milliseconds)

1109

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

1110

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

1111

type_func =

1112

timedelta_to_milliseconds)

1113

extended_timeout = notifychangeproperty(

1114

dbus.UInt64, "ExtendedTimeout",

1115

type_func = timedelta_to_milliseconds)

1116

interval = notifychangeproperty(dbus.UInt64,

1117

"Interval",

1118

type_func =

1119

timedelta_to_milliseconds)

1120

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

1121

1122

del notifychangeproperty

767

def _get_approvals_pending(self):

768

return self._approvals_pending

769

def _set_approvals_pending(self, value):

770

old_value = self._approvals_pending

771

self._approvals_pending = value

772

bval = bool(value)

773

if (hasattr(self, "dbus_object_path")

774

and bval is not bool(old_value)):

775

dbus_bool = dbus.Boolean(bval, variant_level=1)

776

self.PropertyChanged(dbus.String("ApprovalPending"),

777

dbus_bool)

778

779

approvals_pending = property(_get_approvals_pending,

780

_set_approvals_pending)

781

del _get_approvals_pending, _set_approvals_pending

782

783

@staticmethod

784

def _datetime_to_dbus(dt, variant_level=0):

785

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

786

return dbus.String(dt.isoformat(),

787

variant_level=variant_level)

788

789

def enable(self):

790

oldstate = getattr(self, "enabled", False)

791

r = Client.enable(self)

792

if oldstate != self.enabled:

793

# Emit D-Bus signals

794

self.PropertyChanged(dbus.String("Enabled"),

795

dbus.Boolean(True, variant_level=1))

796

self.PropertyChanged(

797

dbus.String("LastEnabled"),

798

self._datetime_to_dbus(self.last_enabled,

799

variant_level=1))

800

return r

801

802

def disable(self, quiet = False):

803

oldstate = getattr(self, "enabled", False)

804

r = Client.disable(self, quiet=quiet)

805

if not quiet and oldstate != self.enabled:

806

# Emit D-Bus signal

807

self.PropertyChanged(dbus.String("Enabled"),

808

dbus.Boolean(False, variant_level=1))

809

return r

1123

810

1124

811

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

1125

812

try:

1134

821

*args, **kwargs):

1135

822

self.checker_callback_tag = None

1136

823

self.checker = None

824

# Emit D-Bus signal

825

self.PropertyChanged(dbus.String("CheckerRunning"),

826

dbus.Boolean(False, variant_level=1))

1137

827

if os.WIFEXITED(condition):

1138

828

exitstatus = os.WEXITSTATUS(condition)

1139

829

# Emit D-Bus signal

1149

839

return Client.checker_callback(self, pid, condition, command,

1150

840

*args, **kwargs)

1151

841

842

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

843

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

844

# Emit D-Bus signal

845

self.PropertyChanged(

846

dbus.String("LastCheckedOK"),

847

(self._datetime_to_dbus(self.last_checked_ok,

848

variant_level=1)))

849

850

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

851

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

852

# Emit D-Bus signal

853

self.PropertyChanged(

854

dbus.String("LastApprovalRequest"),

855

(self._datetime_to_dbus(self.last_approval_request,

856

variant_level=1)))

857

return r

858

1152

859

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

1153

860

old_checker = self.checker

1154

861

if self.checker is not None:

1161

868

and old_checker_pid != self.checker.pid):

1162

869

# Emit D-Bus signal

1163

870

self.CheckerStarted(self.current_checker_command)

871

self.PropertyChanged(

872

dbus.String("CheckerRunning"),

873

dbus.Boolean(True, variant_level=1))

1164

874

return r

1165

875

876

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

877

old_checker = getattr(self, "checker", None)

878

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

879

if (old_checker is not None

880

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

881

self.PropertyChanged(dbus.String("CheckerRunning"),

882

dbus.Boolean(False, variant_level=1))

883

return r

884

1166

885

def _reset_approved(self):

1167

self.approved = None

886

self._approved = None

1168

887

return False

1169

888

1170

889

def approve(self, value=True):

1171

890

self.send_changedstate()

1172

self.approved = value

1173

gobject.timeout_add(timedelta_to_milliseconds

891

self._approved = value

892

gobject.timeout_add(self._timedelta_to_milliseconds

1174

893

(self.approval_duration),

1175

894

self._reset_approved)

1176

895

1177

896

1178

897

## D-Bus methods, signals & properties

1179

_interface = "se.recompile.Mandos.Client"

898

_interface = "se.bsnet.fukt.Mandos.Client"

1180

899

1181

900

## Signals

1182

901

1219

938

"D-Bus signal"

1220

939

return self.need_approval()

1221

940

1222

# NeRwequest - signal

1223

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

1224

def NewRequest(self, ip):

1225

"""D-Bus signal

1226

Is sent after a client request a password.

1227

"""

1228

pass

1229

1230

941

## Methods

1231

942

1232

943

# Approve - method

1276

987

if value is None: # get

1277

988

return dbus.Boolean(self.approved_by_default)

1278

989

self.approved_by_default = bool(value)

990

# Emit D-Bus signal

991

self.PropertyChanged(dbus.String("ApprovedByDefault"),

992

dbus.Boolean(value, variant_level=1))

1279

993

1280

994

# ApprovalDelay - property

1281

995

@dbus_service_property(_interface, signature="t",

1284

998

if value is None: # get

1285

999

return dbus.UInt64(self.approval_delay_milliseconds())

1286

1000

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

1001

# Emit D-Bus signal

1002

self.PropertyChanged(dbus.String("ApprovalDelay"),

1003

dbus.UInt64(value, variant_level=1))

1287

1004

1288

1005

# ApprovalDuration - property

1289

1006

@dbus_service_property(_interface, signature="t",

1290

1007

access="readwrite")

1291

1008

def ApprovalDuration_dbus_property(self, value=None):

1292

1009

if value is None: # get

1293

return dbus.UInt64(timedelta_to_milliseconds(

1010

return dbus.UInt64(self._timedelta_to_milliseconds(

1294

1011

self.approval_duration))

1295

1012

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

1013

# Emit D-Bus signal

1014

self.PropertyChanged(dbus.String("ApprovalDuration"),

1015

dbus.UInt64(value, variant_level=1))

1296

1016

1297

1017

# Name - property

1298

1018

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

1310

1030

def Host_dbus_property(self, value=None):

1311

1031

if value is None: # get

1312

1032

return dbus.String(self.host)

1313

self.host = unicode(value)

1033

self.host = value

1034

# Emit D-Bus signal

1035

self.PropertyChanged(dbus.String("Host"),

1036

dbus.String(value, variant_level=1))

1314

1037

1315

1038

# Created - property

1316

1039

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

1317

1040

def Created_dbus_property(self):

1318

return datetime_to_dbus(self.created)

1041

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

1319

1042

1320

1043

# LastEnabled - property

1321

1044

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

1322

1045

def LastEnabled_dbus_property(self):

1323

return datetime_to_dbus(self.last_enabled)

1046

if self.last_enabled is None:

1047

return dbus.String("")

1048

return dbus.String(self._datetime_to_dbus(self.last_enabled))

1324

1049

1325

1050

# Enabled - property

1326

1051

@dbus_service_property(_interface, signature="b",

1340

1065

if value is not None:

1341

1066

self.checked_ok()

1342

1067

return

1343

return datetime_to_dbus(self.last_checked_ok)

1344

1345

# Expires - property

1346

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

1347

def Expires_dbus_property(self):

1348

return datetime_to_dbus(self.expires)

1068

if self.last_checked_ok is None:

1069

return dbus.String("")

1070

return dbus.String(self._datetime_to_dbus(self

1071

.last_checked_ok))

1349

1072

1350

1073

# LastApprovalRequest - property

1351

1074

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

1352

1075

def LastApprovalRequest_dbus_property(self):

1353

return datetime_to_dbus(self.last_approval_request)

1076

if self.last_approval_request is None:

1077

return dbus.String("")

1078

return dbus.String(self.

1079

_datetime_to_dbus(self

1080

.last_approval_request))

1354

1081

1355

1082

# Timeout - property

1356

1083

@dbus_service_property(_interface, signature="t",

1359

1086

if value is None: # get

1360

1087

return dbus.UInt64(self.timeout_milliseconds())

1361

1088

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

1089

# Emit D-Bus signal

1090

self.PropertyChanged(dbus.String("Timeout"),

1091

dbus.UInt64(value, variant_level=1))

1362

1092

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

1363

1093

return

1364

1094

# Reschedule timeout

1365

1095

gobject.source_remove(self.disable_initiator_tag)

1366

1096

self.disable_initiator_tag = None

1367

self.expires = None

1368

time_to_die = timedelta_to_milliseconds((self

1369

.last_checked_ok

1370

+ self.timeout)

1371

- datetime.datetime

1372

.utcnow())

1097

time_to_die = (self.

1098

_timedelta_to_milliseconds((self

1099

.last_checked_ok

1100

+ self.timeout)

1101

- datetime.datetime

1102

.utcnow()))

1373

1103

if time_to_die <= 0:

1374

1104

# The timeout has passed

1375

1105

self.disable()

1376

1106

else:

1377

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

1378

+ datetime.timedelta(milliseconds =

1379

time_to_die))

1380

1107

self.disable_initiator_tag = (gobject.timeout_add

1381

1108

(time_to_die, self.disable))

1382

1109

1383

# ExtendedTimeout - property

1384

@dbus_service_property(_interface, signature="t",

1385

access="readwrite")

1386

def ExtendedTimeout_dbus_property(self, value=None):

1387

if value is None: # get

1388

return dbus.UInt64(self.extended_timeout_milliseconds())

1389

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

1390

1391

1110

# Interval - property

1392

1111

@dbus_service_property(_interface, signature="t",

1393

1112

access="readwrite")

1395

1114

if value is None: # get

1396

1115

return dbus.UInt64(self.interval_milliseconds())

1397

1116

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

1117

# Emit D-Bus signal

1118

self.PropertyChanged(dbus.String("Interval"),

1119

dbus.UInt64(value, variant_level=1))

1398

1120

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

1399

1121

return

1400

if self.enabled:

1401

# Reschedule checker run

1402

gobject.source_remove(self.checker_initiator_tag)

1403

self.checker_initiator_tag = (gobject.timeout_add

1404

(value, self.start_checker))

1405

self.start_checker() # Start one now, too

1406

1122

# Reschedule checker run

1123

gobject.source_remove(self.checker_initiator_tag)

1124

self.checker_initiator_tag = (gobject.timeout_add

1125

(value, self.start_checker))

1126

self.start_checker() # Start one now, too

1127

1407

1128

# Checker - property

1408

1129

@dbus_service_property(_interface, signature="s",

1409

1130

access="readwrite")

1410

1131

def Checker_dbus_property(self, value=None):

1411

1132

if value is None: # get

1412

1133

return dbus.String(self.checker_command)

1413

self.checker_command = unicode(value)

1134

self.checker_command = value

1135

# Emit D-Bus signal

1136

self.PropertyChanged(dbus.String("Checker"),

1137

dbus.String(self.checker_command,

1138

variant_level=1))

1414

1139

1415

1140

# CheckerRunning - property

1416

1141

@dbus_service_property(_interface, signature="b",

1443

1168

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

1444

1169

if not self._pipe.recv():

1445

1170

raise KeyError()

1446

1171

1447

1172

def __getattribute__(self, name):

1448

if name == '_pipe':

1173

if(name == '_pipe'):

1449

1174

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

1450

1175

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

1451

1176

data = self._pipe.recv()

1456

1181

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

1457

1182

return self._pipe.recv()[1]

1458

1183

return func

1459

1184

1460

1185

def __setattr__(self, name, value):

1461

if name == '_pipe':

1186

if(name == '_pipe'):

1462

1187

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

1463

1188

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

1464

1189

1465

1190

1466

class ClientDBusTransitional(ClientDBus):

1467

__metaclass__ = AlternateDBusNamesMetaclass

1468

1469

1470

1191

class ClientHandler(socketserver.BaseRequestHandler, object):

1471

1192

"""A class to handle client connections.

1472

1193

1479

1200

unicode(self.client_address))

1480

1201

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

1481

1202

self.server.child_pipe.fileno())

1482

1203

1483

1204

session = (gnutls.connection

1484

1205

.ClientSession(self.request,

1485

1206

gnutls.connection

1486

1207

.X509Credentials()))

1487

1208

1488

1209

# Note: gnutls.connection.X509Credentials is really a

1489

1210

# generic GnuTLS certificate credentials object so long as

1490

1211

# no X.509 keys are added to it. Therefore, we can use it

1491

1212

# here despite using OpenPGP certificates.

1492

1213

1493

1214

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

1494

1215

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

1495

1216

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

1501

1222

(gnutls.library.functions

1502

1223

.gnutls_priority_set_direct(session._c_object,

1503

1224

priority, None))

1504

1225

1505

1226

# Start communication using the Mandos protocol

1506

1227

# Get protocol number

1507

1228

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

1512

1233

except (ValueError, IndexError, RuntimeError) as error:

1513

1234

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

1514

1235

return

1515

1236

1516

1237

# Start GnuTLS connection

1517

1238

try:

1518

1239

session.handshake()

1522

1243

# established. Just abandon the request.

1523

1244

return

1524

1245

logger.debug("Handshake succeeded")

1525

1246

1526

1247

approval_required = False

1527

1248

try:

1528

1249

try:

1533

1254

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

1534

1255

return

1535

1256

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

1536

1257

1537

1258

try:

1538

1259

client = ProxyClient(child_pipe, fpr,

1539

1260

self.client_address)

1540

1261

except KeyError:

1541

1262

return

1542

1263

1543

if self.server.use_dbus:

1544

# Emit D-Bus signal

1545

client.NewRequest(str(self.client_address))

1546

1547

1264

if client.approval_delay:

1548

1265

delay = client.approval_delay

1549

1266

client.approvals_pending += 1

1555

1272

client.name)

1556

1273

if self.server.use_dbus:

1557

1274

# Emit D-Bus signal

1558

client.Rejected("Disabled")

1275

client.Rejected("Disabled")

1559

1276

return

1560

1277

1561

if client.approved or not client.approval_delay:

1278

if client._approved or not client.approval_delay:

1562

1279

#We are approved or approval is disabled

1563

1280

break

1564

elif client.approved is None:

1281

elif client._approved is None:

1565

1282

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

1566

1283

client.name)

1567

1284

if self.server.use_dbus:

1578

1295

return

1579

1296

1580

1297

#wait until timeout or approved

1298

#x = float(client._timedelta_to_milliseconds(delay))

1581

1299

time = datetime.datetime.now()

1582

1300

client.changedstate.acquire()

1583

(client.changedstate.wait

1584

(float(client.timedelta_to_milliseconds(delay)

1585

/ 1000)))

1301

client.changedstate.wait(float(client._timedelta_to_milliseconds(delay) / 1000))

1586

1302

client.changedstate.release()

1587

1303

time2 = datetime.datetime.now()

1588

1304

if (time2 - time) >= delay:

1610

1326

sent, len(client.secret)

1611

1327

- (sent_size + sent))

1612

1328

sent_size += sent

1613

1329

1614

1330

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

1615

# bump the timeout using extended_timeout

1616

client.checked_ok(client.extended_timeout)

1331

# bump the timeout as if seen

1332

client.checked_ok()

1617

1333

if self.server.use_dbus:

1618

1334

# Emit D-Bus signal

1619

1335

client.GotSecret()

1686

1402

# Convert the buffer to a Python bytestring

1687

1403

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

1688

1404

# Convert the bytestring to hexadecimal notation

1689

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

1405

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

1690

1406

return hex_fpr

1691

1407

1692

1408

1695

1411

def sub_process_main(self, request, address):

1696

1412

try:

1697

1413

self.finish_request(request, address)

1698

except Exception:

1414

except:

1699

1415

self.handle_error(request, address)

1700

1416

self.close_request(request)

1701

1417

1702

1418

def process_request(self, request, address):

1703

1419

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

1704

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

1705

args = (request,

1706

address))

1707

proc.start()

1708

return proc

1709

1420

multiprocessing.Process(target = self.sub_process_main,

1421

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

1710

1422

1711

1423

class MultiprocessingMixInWithPipe(MultiprocessingMixIn, object):

1712

1424

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

1716

1428

This function creates a new pipe in self.pipe

1717

1429

"""

1718

1430

parent_pipe, self.child_pipe = multiprocessing.Pipe()

1719

1720

proc = MultiprocessingMixIn.process_request(self, request,

1721

client_address)

1431

1432

super(MultiprocessingMixInWithPipe,

1433

self).process_request(request, client_address)

1722

1434

self.child_pipe.close()

1723

self.add_pipe(parent_pipe, proc)

1724

1725

def add_pipe(self, parent_pipe, proc):

1435

self.add_pipe(parent_pipe)

1436

1437

def add_pipe(self, parent_pipe):

1726

1438

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

1727

1439

raise NotImplementedError

1728

1440

1729

1730

1441

class IPv6_TCPServer(MultiprocessingMixInWithPipe,

1731

1442

socketserver.TCPServer, object):

1732

1443

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

1806

1517

self.enabled = False

1807

1518

self.clients = clients

1808

1519

if self.clients is None:

1809

self.clients = {}

1520

self.clients = set()

1810

1521

self.use_dbus = use_dbus

1811

1522

self.gnutls_priority = gnutls_priority

1812

1523

IPv6_TCPServer.__init__(self, server_address,

1816

1527

def server_activate(self):

1817

1528

if self.enabled:

1818

1529

return socketserver.TCPServer.server_activate(self)

1819

1820

1530

def enable(self):

1821

1531

self.enabled = True

1822

1823

def add_pipe(self, parent_pipe, proc):

1532

def add_pipe(self, parent_pipe):

1824

1533

# Call "handle_ipc" for both data and EOF events

1825

1534

gobject.io_add_watch(parent_pipe.fileno(),

1826

1535

gobject.IO_IN | gobject.IO_HUP,

1827

1536

functools.partial(self.handle_ipc,

1828

parent_pipe =

1829

parent_pipe,

1830

proc = proc))

1831

1537

parent_pipe = parent_pipe))

1538

1832

1539

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

1833

proc = None, client_object=None):

1540

client_object=None):

1834

1541

condition_names = {

1835

1542

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

1836

1543

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

1845

1552

for cond, name in

1846

1553

condition_names.iteritems()

1847

1554

if cond & condition)

1848

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

1555

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

1849

1556

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

1850

# Wait for other process to exit

1851

proc.join()

1852

1557

return False

1853

1558

1854

1559

# Read a request from the child

1859

1564

fpr = request[1]

1860

1565

address = request[2]

1861

1566

1862

for c in self.clients.itervalues():

1567

for c in self.clients:

1863

1568

if c.fingerprint == fpr:

1864

1569

client = c

1865

1570

break

1868

1573

"dress: %s", fpr, address)

1869

1574

if self.use_dbus:

1870

1575

# Emit D-Bus signal

1871

mandos_dbus_service.ClientNotFound(fpr,

1872

address[0])

1576

mandos_dbus_service.ClientNotFound(fpr, address[0])

1873

1577

parent_pipe.send(False)

1874

1578

return False

1875

1579

1876

1580

gobject.io_add_watch(parent_pipe.fileno(),

1877

1581

gobject.IO_IN | gobject.IO_HUP,

1878

1582

functools.partial(self.handle_ipc,

1879

parent_pipe =

1880

parent_pipe,

1881

proc = proc,

1882

client_object =

1883

client))

1583

parent_pipe = parent_pipe,

1584

client_object = client))

1884

1585

parent_pipe.send(True)

1885

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

1886

# same fileno

1586

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

1887

1587

return False

1888

1588

if command == 'funcall':

1889

1589

funcname = request[1]

1890

1590

args = request[2]

1891

1591

kwargs = request[3]

1892

1592

1893

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

1894

funcname)(*args,

1895

**kwargs)))

1896

1593

parent_pipe.send(('data', getattr(client_object, funcname)(*args, **kwargs)))

1594

1897

1595

if command == 'getattr':

1898

1596

attrname = request[1]

1899

1597

if callable(client_object.__getattribute__(attrname)):

1900

1598

parent_pipe.send(('function',))

1901

1599

else:

1902

parent_pipe.send(('data', client_object

1903

.__getattribute__(attrname)))

1600

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

1904

1601

1905

1602

if command == 'setattr':

1906

1603

attrname = request[1]

1907

1604

value = request[2]

1908

1605

setattr(client_object, attrname, value)

1909

1606

1910

1607

return True

1911

1608

1912

1609

1949

1646

return timevalue

1950

1647

1951

1648

1649

def if_nametoindex(interface):

1650

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

1651

1652

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

1653

global if_nametoindex

1654

try:

1655

if_nametoindex = (ctypes.cdll.LoadLibrary

1656

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

1657

.if_nametoindex)

1658

except (OSError, AttributeError):

1659

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

1660

def if_nametoindex(interface):

1661

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

1662

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

1663

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

1664

ifreq = fcntl.ioctl(s, SIOCGIFINDEX,

1665

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

1666

interface))

1667

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

1668

ifreq[16:20])[0]

1669

return interface_index

1670

return if_nametoindex(interface)

1671

1672

1952

1673

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

1953

1674

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

1954

1675

2009

1730

" system bus interface")

2010

1731

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

2011

1732

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

2012

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

2013

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

2014

" state")

2015

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

2016

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

2017

2018

1733

options = parser.parse_args()

2019

1734

2020

1735

if options.check:

2033

1748

"use_dbus": "True",

2034

1749

"use_ipv6": "True",

2035

1750

"debuglevel": "",

2036

"restore": "True",

2037

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

2038

1751

}

2039

1752

2040

1753

# Parse config file for server-global settings

2057

1770

# options, if set.

2058

1771

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

2059

1772

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

2060

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

2061

"statedir"):

1773

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

2062

1774

value = getattr(options, option)

2063

1775

if value is not None:

2064

1776

server_settings[option] = value

2076

1788

debuglevel = server_settings["debuglevel"]

2077

1789

use_dbus = server_settings["use_dbus"]

2078

1790

use_ipv6 = server_settings["use_ipv6"]

2079

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

2080

stored_state_file)

2081

2082

if debug:

2083

initlogger(debug, logging.DEBUG)

2084

else:

2085

if not debuglevel:

2086

initlogger(debug)

2087

else:

2088

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

2089

initlogger(debug, level)

2090

1791

2091

1792

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

2092

1793

syslogger.setFormatter(logging.Formatter

2093

1794

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

2095

1796

% server_settings["servicename"]))

2096

1797

2097

1798

# Parse config file with clients

2098

client_config = configparser.SafeConfigParser(Client.client_defaults)

1799

client_defaults = { "timeout": "1h",

1800

"interval": "5m",

1801

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

1802

"host": "",

1803

"approval_delay": "0s",

1804

"approval_duration": "1s",

1805

}

1806

client_config = configparser.SafeConfigParser(client_defaults)

2099

1807

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

2100

1808

"clients.conf"))

2101

1809

2139

1847

if error[0] != errno.EPERM:

2140

1848

raise error

2141

1849

1850

if not debug and not debuglevel:

1851

syslogger.setLevel(logging.WARNING)

1852

console.setLevel(logging.WARNING)

1853

if debuglevel:

1854

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

1855

syslogger.setLevel(level)

1856

console.setLevel(level)

1857

2142

1858

if debug:

2143

1859

# Enable all possible GnuTLS debugging

2144

1860

2158

1874

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

2159

1875

if null > 2:

2160

1876

os.close(null)

1877

else:

1878

# No console logging

1879

logger.removeHandler(console)

2161

1880

2162

1881

# Need to fork before connecting to D-Bus

2163

1882

if not debug:

2164

1883

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

2165

1884

daemon()

2166

1885

2167

gobject.threads_init()

2168

2169

1886

global main_loop

2170

1887

# From the Avahi example code

2171

1888

DBusGMainLoop(set_as_default=True )

2174

1891

# End of Avahi example code

2175

1892

if use_dbus:

2176

1893

try:

2177

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

1894

bus_name = dbus.service.BusName("se.bsnet.fukt.Mandos",

2178

1895

bus, do_not_queue=True)

2179

old_bus_name = (dbus.service.BusName

2180

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

2181

do_not_queue=True))

2182

1896

except dbus.exceptions.NameExistsException as e:

2183

1897

logger.error(unicode(e) + ", disabling D-Bus")

2184

1898

use_dbus = False

2185

1899

server_settings["use_dbus"] = False

2186

1900

tcp_server.use_dbus = False

2187

1901

protocol = avahi.PROTO_INET6 if use_ipv6 else avahi.PROTO_INET

2188

service = AvahiServiceToSyslog(name =

2189

server_settings["servicename"],

2190

servicetype = "_mandos._tcp",

2191

protocol = protocol, bus = bus)

1902

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

1903

servicetype = "_mandos._tcp",

1904

protocol = protocol, bus = bus)

2192

1905

if server_settings["interface"]:

2193

1906

service.interface = (if_nametoindex

2194

1907

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

2198

1911

2199

1912

client_class = Client

2200

1913

if use_dbus:

2201

client_class = functools.partial(ClientDBusTransitional,

2202

bus = bus)

2203

2204

client_settings = Client.config_parser(client_config)

2205

old_client_settings = {}

2206

clients_data = {}

2207

2208

# Get client data and settings from last running state.

2209

if server_settings["restore"]:

2210

try:

2211

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

2212

clients_data, old_client_settings = (pickle.load

2213

(stored_state))

2214

os.remove(stored_state_path)

2215

except IOError as e:

2216

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

2217

.format(e))

2218

if e.errno != errno.ENOENT:

2219

raise

2220

except EOFError as e:

2221

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

2222

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

2223

2224

with PGPEngine() as pgp:

2225

for client_name, client in clients_data.iteritems():

2226

# Decide which value to use after restoring saved state.

2227

# We have three different values: Old config file,

2228

# new config file, and saved state.

2229

# New config value takes precedence if it differs from old

2230

# config value, otherwise use saved state.

2231

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

2232

try:

2233

# For each value in new config, check if it

2234

# differs from the old config value (Except for

2235

# the "secret" attribute)

2236

if (name != "secret" and

2237

value != old_client_settings[client_name]

2238

[name]):

2239

client[name] = value

2240

except KeyError:

2241

pass

2242

2243

# Clients who has passed its expire date can still be

2244

# enabled if its last checker was successful. Clients

2245

# whose checker failed before we stored its state is

2246

# assumed to have failed all checkers during downtime.

2247

if client["enabled"]:

2248

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

2249

if not client["last_checked_ok"]:

2250

logger.warning(

2251

"disabling client {0} - Client never "

2252

"performed a successfull checker"

2253

.format(client["name"]))

2254

client["enabled"] = False

2255

elif client["last_checker_status"] != 0:

2256

logger.warning(

2257

"disabling client {0} - Client "

2258

"last checker failed with error code {1}"

2259

.format(client["name"],

2260

client["last_checker_status"]))

2261

client["enabled"] = False

2262

else:

2263

client["expires"] = (datetime.datetime

2264

.utcnow()

2265

+ client["timeout"])

2266

1914

client_class = functools.partial(ClientDBus, bus = bus)

1915

def client_config_items(config, section):

1916

special_settings = {

1917

"approved_by_default":

1918

lambda: config.getboolean(section,

1919

"approved_by_default"),

1920

}

1921

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

2267

1922

try:

2268

client["secret"] = (

2269

pgp.decrypt(client["encrypted_secret"],

2270

client_settings[client_name]

2271

["secret"]))

2272

except PGPError:

2273

# If decryption fails, we use secret from new settings

2274

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

2275

.format(client_name))

2276

client["secret"] = (

2277

client_settings[client_name]["secret"])

2278

2279

2280

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

2281

for client_name in set(old_client_settings) - set(client_settings):

2282

del clients_data[client_name]

2283

for client_name in set(client_settings) - set(old_client_settings):

2284

clients_data[client_name] = client_settings[client_name]

2285

2286

# Create clients all clients

2287

for client_name, client in clients_data.iteritems():

2288

tcp_server.clients[client_name] = client_class(

2289

name = client_name, settings = client)

2290

1923

yield (name, special_settings[name]())

1924

except KeyError:

1925

yield (name, value)

1926

1927

tcp_server.clients.update(set(

1928

client_class(name = section,

1929

config= dict(client_config_items(

1930

client_config, section)))

1931

for section in client_config.sections()))

2291

1932

if not tcp_server.clients:

2292

1933

logger.warning("No clients defined")

2293

1934

2304

1945

# "pidfile" was never created

2305

1946

pass

2306

1947

del pidfilename

1948

2307

1949

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

2308

1950

2309

1951

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

2310

1952

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

2311

1953

2314

1956

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

2315

1957

def __init__(self):

2316

1958

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

2317

_interface = "se.recompile.Mandos"

1959

_interface = "se.bsnet.fukt.Mandos"

2318

1960

2319

1961

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

2320

1962

def ClientAdded(self, objpath):

2335

1977

def GetAllClients(self):

2336

1978

"D-Bus method"

2337

1979

return dbus.Array(c.dbus_object_path

2338

for c in

2339

tcp_server.clients.itervalues())

1980

for c in tcp_server.clients)

2340

1981

2341

1982

@dbus.service.method(_interface,

2342

1983

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

2344

1985

"D-Bus method"

2345

1986

return dbus.Dictionary(

2346

1987

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

2347

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

1988

for c in tcp_server.clients),

2348

1989

signature="oa{sv}")

2349

1990

2350

1991

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

2351

1992

def RemoveClient(self, object_path):

2352

1993

"D-Bus method"

2353

for c in tcp_server.clients.itervalues():

1994

for c in tcp_server.clients:

2354

1995

if c.dbus_object_path == object_path:

2355

del tcp_server.clients[c.name]

1996

tcp_server.clients.remove(c)

2356

1997

c.remove_from_connection()

2357

1998

# Don't signal anything except ClientRemoved

2358

1999

c.disable(quiet=True)

2363

2004

2364

2005

del _interface

2365

2006

2366

class MandosDBusServiceTransitional(MandosDBusService):

2367

__metaclass__ = AlternateDBusNamesMetaclass

2368

mandos_dbus_service = MandosDBusServiceTransitional()

2007

mandos_dbus_service = MandosDBusService()

2369

2008

2370

2009

def cleanup():

2371

2010

"Cleanup function; run on exit"

2372

2011

service.cleanup()

2373

2012

2374

multiprocessing.active_children()

2375

if not (tcp_server.clients or client_settings):

2376

return

2377

2378

# Store client before exiting. Secrets are encrypted with key

2379

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

2380

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

2381

clients = {}

2382

with PGPEngine() as pgp:

2383

for client in tcp_server.clients.itervalues():

2384

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

2385

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

2386

key)

2387

client_dict = {}

2388

2389

# A list of attributes that can not be pickled

2390

# + secret.

2391

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

2392

"checker"))

2393

for name, typ in (inspect.getmembers

2394

(dbus.service.Object)):

2395

exclude.add(name)

2396

2397

client_dict["encrypted_secret"] = (client

2398

.encrypted_secret)

2399

for attr in client.client_structure:

2400

if attr not in exclude:

2401

client_dict[attr] = getattr(client, attr)

2402

2403

clients[client.name] = client_dict

2404

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

2405

2406

try:

2407

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

2408

prefix="clients-",

2409

dir=os.path.dirname

2410

(stored_state_path))

2411

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

2412

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

2413

os.rename(tempname, stored_state_path)

2414

except (IOError, OSError) as e:

2415

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

2416

.format(e))

2417

if not debug:

2418

try:

2419

os.remove(tempname)

2420

except NameError:

2421

pass

2422

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

2423

errno.EEXIST)):

2424

raise e

2425

2426

# Delete all clients, and settings from config

2427

2013

while tcp_server.clients:

2428

name, client = tcp_server.clients.popitem()

2014

client = tcp_server.clients.pop()

2429

2015

if use_dbus:

2430

2016

client.remove_from_connection()

2017

client.disable_hook = None

2431

2018

# Don't signal anything except ClientRemoved

2432

2019

client.disable(quiet=True)

2433

2020

if use_dbus:

2434

2021

# Emit D-Bus signal

2435

mandos_dbus_service.ClientRemoved(client

2436

.dbus_object_path,

2022

mandos_dbus_service.ClientRemoved(client.dbus_object_path,

2437

2023

client.name)

2438

client_settings.clear()

2439

2024

2440

2025

atexit.register(cleanup)

2441

2026

2442

for client in tcp_server.clients.itervalues():

2027

for client in tcp_server.clients:

2443

2028

if use_dbus:

2444

2029

# Emit D-Bus signal

2445

2030

mandos_dbus_service.ClientAdded(client.dbus_object_path)

2446

# Need to initiate checking of clients

2447

if client.enabled:

2448

client.init_checker()

2031

client.enable()

2449

2032

2450

2033

tcp_server.enable()

2451

2034

tcp_server.server_activate()