/mandos/trunk : revision 491

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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(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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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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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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386

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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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389

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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",

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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))

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444

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def timeout_milliseconds(self):

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"Return the 'timeout' attribute in milliseconds"

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return timedelta_to_milliseconds(self.timeout)

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def extended_timeout_milliseconds(self):

449

"Return the 'extended_timeout' attribute in milliseconds"

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return timedelta_to_milliseconds(self.extended_timeout)

317

return self._timedelta_to_milliseconds(self.timeout)

451

318

452

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def interval_milliseconds(self):

453

320

"Return the 'interval' attribute in milliseconds"

454

return timedelta_to_milliseconds(self.interval)

455

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return self._timedelta_to_milliseconds(self.interval)

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456

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def approval_delay_milliseconds(self):

457

return timedelta_to_milliseconds(self.approval_delay)

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459

@staticmethod

460

def config_parser(config):

461

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

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

463

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

464

settings = {}

465

for client_name in config.sections():

466

section = dict(config.items(client_name))

467

client = settings[client_name] = {}

468

469

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

470

# Reformat values from string types to Python types

471

client["approved_by_default"] = config.getboolean(

472

client_name, "approved_by_default")

473

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

474

475

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

476

.replace(" ", ""))

477

if "secret" in section:

478

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

479

elif "secfile" in section:

480

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

481

(section["secfile"])),

482

"rb") as secfile:

483

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

484

else:

485

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

486

% section)

487

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

488

client["extended_timeout"] = string_to_delta(

489

section["extended_timeout"])

490

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

491

client["approval_delay"] = string_to_delta(

492

section["approval_delay"])

493

client["approval_duration"] = string_to_delta(

494

section["approval_duration"])

495

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

496

client["last_approval_request"] = None

497

client["last_checked_ok"] = None

498

client["last_checker_status"] = None

499

if client["enabled"]:

500

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

501

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

502

+ client["timeout"])

503

else:

504

client["last_enabled"] = None

505

client["expires"] = None

506

507

return settings

508

509

510

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):

511

327

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

512

328

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

513

329

attribute."""

514

330

self.name = name

515

# adding all client settings

516

for setting, value in settings.iteritems():

517

setattr(self, setting, value)

518

331

if config is None:

332

config = {}

519

333

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

520

334

# Uppercase and remove spaces from fingerprint for later

521

335

# comparison purposes with return value from the fingerprint()

522

336

# function

337

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

338

.replace(" ", ""))

523

339

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

524

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

525

526

# 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

527

359

self.checker = None

528

360

self.checker_initiator_tag = None

529

361

self.disable_initiator_tag = None

530

362

self.checker_callback_tag = None

363

self.checker_command = config["checker"]

531

364

self.current_checker_command = None

532

self.approved = None

365

self.last_connect = None

366

self._approved = None

367

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

368

True)

533

369

self.approvals_pending = 0

534

self.changedstate = (multiprocessing_manager

535

.Condition(multiprocessing_manager

536

.Lock()))

537

self.client_structure = [attr for attr in

538

self.__dict__.iterkeys()

539

if not attr.startswith("_")]

540

self.client_structure.append("client_structure")

541

542

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

543

lambda obj:

544

isinstance(obj,

545

property)):

546

if not name.startswith("_"):

547

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())

548

375

549

# Send notice to process children that client state has changed

550

376

def send_changedstate(self):

551

with self.changedstate:

552

self.changedstate.notify_all()

553

377

self.changedstate.acquire()

378

self.changedstate.notify_all()

379

self.changedstate.release()

380

554

381

def enable(self):

555

382

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

556

383

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

557

384

# Already enabled

558

385

return

559

386

self.send_changedstate()

560

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

561

self.enabled = True

562

387

self.last_enabled = datetime.datetime.utcnow()

563

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()

564

400

565

401

def disable(self, quiet=True):

566

402

"""Disable this client."""

573

409

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

574

410

gobject.source_remove(self.disable_initiator_tag)

575

411

self.disable_initiator_tag = None

576

self.expires = None

577

412

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

578

413

gobject.source_remove(self.checker_initiator_tag)

579

414

self.checker_initiator_tag = None

580

415

self.stop_checker()

416

if self.disable_hook:

417

self.disable_hook(self)

581

418

self.enabled = False

582

419

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

583

420

return False

584

421

585

422

def __del__(self):

423

self.disable_hook = None

586

424

self.disable()

587

425

588

def init_checker(self):

589

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

590

# and every interval from then on.

591

self.checker_initiator_tag = (gobject.timeout_add

592

(self.interval_milliseconds(),

593

self.start_checker))

594

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

595

self.disable_initiator_tag = (gobject.timeout_add

596

(self.timeout_milliseconds(),

597

self.disable))

598

# Also start a new checker *right now*.

599

self.start_checker()

600

601

426

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

602

427

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

603

428

self.checker_callback_tag = None

604

429

self.checker = None

605

430

if os.WIFEXITED(condition):

606

self.last_checker_status = os.WEXITSTATUS(condition)

607

if self.last_checker_status == 0:

431

exitstatus = os.WEXITSTATUS(condition)

432

if exitstatus == 0:

608

433

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

609

434

vars(self))

610

435

self.checked_ok()

612

437

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

613

438

vars(self))

614

439

else:

615

self.last_checker_status = -1

616

440

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

617

441

vars(self))

618

442

619

def checked_ok(self, timeout=None):

443

def checked_ok(self):

620

444

"""Bump up the timeout for this client.

621

445

622

446

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

623

447

alive and well.

624

448

"""

625

if timeout is None:

626

timeout = self.timeout

627

449

self.last_checked_ok = datetime.datetime.utcnow()

628

if self.disable_initiator_tag is not None:

629

gobject.source_remove(self.disable_initiator_tag)

630

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

631

self.disable_initiator_tag = (gobject.timeout_add

632

(timedelta_to_milliseconds

633

(timeout), self.disable))

634

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))

635

454

636

455

def need_approval(self):

637

456

self.last_approval_request = datetime.datetime.utcnow()

677

496

'replace')))

678

497

for attr in

679

498

self.runtime_expansions)

680

499

681

500

try:

682

501

command = self.checker_command % escaped_attrs

683

502

except TypeError as error:

729

548

raise

730

549

self.checker = None

731

550

732

733

551

def dbus_service_property(dbus_interface, signature="v",

734

552

access="readwrite", byte_arrays=False):

735

553

"""Decorators for marking methods of a DBusObjectWithProperties to

781

599

782

600

class DBusObjectWithProperties(dbus.service.Object):

783

601

"""A D-Bus object with properties.

784

602

785

603

Classes inheriting from this can use the dbus_service_property

786

604

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

787

605

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

794

612

def _get_all_dbus_properties(self):

795

613

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

796

614

"""

797

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

798

for cls in self.__class__.__mro__

615

return ((prop._dbus_name, prop)

799

616

for name, prop in

800

inspect.getmembers(cls, self._is_dbus_property))

617

inspect.getmembers(self, self._is_dbus_property))

801

618

802

619

def _get_dbus_property(self, interface_name, property_name):

803

620

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

804

621

property with the specified name and interface.

805

622

"""

806

for cls in self.__class__.__mro__:

807

for name, value in (inspect.getmembers

808

(cls, self._is_dbus_property)):

809

if (value._dbus_name == property_name

810

and value._dbus_interface == interface_name):

811

return value.__get__(self)

812

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

813

633

# No such property

814

634

raise DBusPropertyNotFound(self.dbus_object_path + ":"

815

635

+ interface_name + "."

849

669

def GetAll(self, interface_name):

850

670

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

851

671

standard.

852

672

853

673

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

854

674

"""

855

properties = {}

675

all = {}

856

676

for name, prop in self._get_all_dbus_properties():

857

677

if (interface_name

858

678

and interface_name != prop._dbus_interface):

863

683

continue

864

684

value = prop()

865

685

if not hasattr(value, "variant_level"):

866

properties[name] = value

686

all[name] = value

867

687

continue

868

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

869

value.variant_level+1)

870

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")

871

691

872

692

@dbus.service.method(dbus.INTROSPECTABLE_IFACE,

873

693

out_signature="s",

917

737

return xmlstring

918

738

919

739

920

def datetime_to_dbus (dt, variant_level=0):

921

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

922

if dt is None:

923

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

924

return dbus.String(dt.isoformat(),

925

variant_level=variant_level)

926

927

928

class AlternateDBusNamesMetaclass(DBusObjectWithProperties

929

.__metaclass__):

930

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

931

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

932

"""

933

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

934

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

935

# methods, signals, or properties in them

936

for base in (b for b in bases

937

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

938

# Go though all attributes of the base class

939

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

940

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

941

# with the wrong interface name

942

if (not hasattr(attribute, "_dbus_interface")

943

or not attribute._dbus_interface

944

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

945

continue

946

# Create an alternate D-Bus interface name based on

947

# the current name

948

alt_interface = (attribute._dbus_interface

949

.replace("se.recompile.Mandos",

950

"se.bsnet.fukt.Mandos"))

951

# Is this a D-Bus signal?

952

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

953

# Extract the original non-method function by

954

# black magic

955

nonmethod_func = (dict(

956

zip(attribute.func_code.co_freevars,

957

attribute.__closure__))["func"]

958

.cell_contents)

959

# Create a new, but exactly alike, function

960

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

961

# with the alternate D-Bus interface name

962

new_function = (dbus.service.signal

963

(alt_interface,

964

attribute._dbus_signature)

965

(types.FunctionType(

966

nonmethod_func.func_code,

967

nonmethod_func.func_globals,

968

nonmethod_func.func_name,

969

nonmethod_func.func_defaults,

970

nonmethod_func.func_closure)))

971

# Define a creator of a function to call both the

972

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

973

# signals gets sent when the function is called

974

def fixscope(func1, func2):

975

"""This function is a scope container to pass

976

func1 and func2 to the "call_both" function

977

outside of its arguments"""

978

def call_both(*args, **kwargs):

979

"""This function will emit two D-Bus

980

signals by calling func1 and func2"""

981

func1(*args, **kwargs)

982

func2(*args, **kwargs)

983

return call_both

984

# Create the "call_both" function and add it to

985

# the class

986

attr[attrname] = fixscope(attribute,

987

new_function)

988

# Is this a D-Bus method?

989

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

990

# Create a new, but exactly alike, function

991

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

992

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

993

# to the class.

994

attr[attrname] = (dbus.service.method

995

(alt_interface,

996

attribute._dbus_in_signature,

997

attribute._dbus_out_signature)

998

(types.FunctionType

999

(attribute.func_code,

1000

attribute.func_globals,

1001

attribute.func_name,

1002

attribute.func_defaults,

1003

attribute.func_closure)))

1004

# Is this a D-Bus property?

1005

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

1006

# Create a new, but exactly alike, function

1007

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

1008

# property with the alternate D-Bus interface

1009

# name. Add it to the class.

1010

attr[attrname] = (dbus_service_property

1011

(alt_interface,

1012

attribute._dbus_signature,

1013

attribute._dbus_access,

1014

attribute

1015

._dbus_get_args_options

1016

["byte_arrays"])

1017

(types.FunctionType

1018

(attribute.func_code,

1019

attribute.func_globals,

1020

attribute.func_name,

1021

attribute.func_defaults,

1022

attribute.func_closure)))

1023

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

1024

1025

1026

740

class ClientDBus(Client, DBusObjectWithProperties):

1027

741

"""A Client class using D-Bus

1028

742

1037

751

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

1038

752

1039

753

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

754

self._approvals_pending = 0

1040

755

self.bus = bus

1041

756

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

1042

self._approvals_pending = 0

1043

1044

self._approvals_pending = 0

1045

757

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

1046

758

# the D-Bus

1047

759

client_object_name = unicode(self.name).translate(

1052

764

DBusObjectWithProperties.__init__(self, self.bus,

1053

765

self.dbus_object_path)

1054

766

1055

def notifychangeproperty(transform_func,

1056

dbus_name, type_func=lambda x: x,

1057

variant_level=1):

1058

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

1059

its changes to DBus.

1060

1061

transform_fun: Function that takes a value and a variant_level

1062

and transforms it to a D-Bus type.

1063

dbus_name: D-Bus name of the variable

1064

type_func: Function that transform the value before sending it

1065

to the D-Bus. Default: no transform

1066

variant_level: D-Bus variant level. Default: 1

1067

"""

1068

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

1069

def setter(self, value):

1070

if hasattr(self, "dbus_object_path"):

1071

if (not hasattr(self, attrname) or

1072

type_func(getattr(self, attrname, None))

1073

!= type_func(value)):

1074

dbus_value = transform_func(type_func(value),

1075

variant_level

1076

=variant_level)

1077

self.PropertyChanged(dbus.String(dbus_name),

1078

dbus_value)

1079

setattr(self, attrname, value)

1080

1081

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

1082

1083

1084

expires = notifychangeproperty(datetime_to_dbus, "Expires")

1085

approvals_pending = notifychangeproperty(dbus.Boolean,

1086

"ApprovalPending",

1087

type_func = bool)

1088

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

1089

last_enabled = notifychangeproperty(datetime_to_dbus,

1090

"LastEnabled")

1091

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

1092

type_func = lambda checker:

1093

checker is not None)

1094

last_checked_ok = notifychangeproperty(datetime_to_dbus,

1095

"LastCheckedOK")

1096

last_approval_request = notifychangeproperty(

1097

datetime_to_dbus, "LastApprovalRequest")

1098

approved_by_default = notifychangeproperty(dbus.Boolean,

1099

"ApprovedByDefault")

1100

approval_delay = notifychangeproperty(dbus.UInt64,

1101

"ApprovalDelay",

1102

type_func =

1103

timedelta_to_milliseconds)

1104

approval_duration = notifychangeproperty(

1105

dbus.UInt64, "ApprovalDuration",

1106

type_func = timedelta_to_milliseconds)

1107

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

1108

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

1109

type_func =

1110

timedelta_to_milliseconds)

1111

extended_timeout = notifychangeproperty(

1112

dbus.UInt64, "ExtendedTimeout",

1113

type_func = timedelta_to_milliseconds)

1114

interval = notifychangeproperty(dbus.UInt64,

1115

"Interval",

1116

type_func =

1117

timedelta_to_milliseconds)

1118

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

1119

1120

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

1121

810

1122

811

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

1123

812

try:

1132

821

*args, **kwargs):

1133

822

self.checker_callback_tag = None

1134

823

self.checker = None

824

# Emit D-Bus signal

825

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

826

dbus.Boolean(False, variant_level=1))

1135

827

if os.WIFEXITED(condition):

1136

828

exitstatus = os.WEXITSTATUS(condition)

1137

829

# Emit D-Bus signal

1147

839

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

1148

840

*args, **kwargs)

1149

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

1150

859

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

1151

860

old_checker = self.checker

1152

861

if self.checker is not None:

1159

868

and old_checker_pid != self.checker.pid):

1160

869

# Emit D-Bus signal

1161

870

self.CheckerStarted(self.current_checker_command)

871

self.PropertyChanged(

872

dbus.String("CheckerRunning"),

873

dbus.Boolean(True, variant_level=1))

1162

874

return r

1163

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

1164

885

def _reset_approved(self):

1165

self.approved = None

886

self._approved = None

1166

887

return False

1167

888

1168

889

def approve(self, value=True):

1169

890

self.send_changedstate()

1170

self.approved = value

1171

gobject.timeout_add(timedelta_to_milliseconds

891

self._approved = value

892

gobject.timeout_add(self._timedelta_to_milliseconds

1172

893

(self.approval_duration),

1173

894

self._reset_approved)

1174

895

1175

896

1176

897

## D-Bus methods, signals & properties

1177

_interface = "se.recompile.Mandos.Client"

898

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

1178

899

1179

900

## Signals

1180

901

1217

938

"D-Bus signal"

1218

939

return self.need_approval()

1219

940

1220

# NeRwequest - signal

1221

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

1222

def NewRequest(self, ip):

1223

"""D-Bus signal

1224

Is sent after a client request a password.

1225

"""

1226

pass

1227

1228

941

## Methods

1229

942

1230

943

# Approve - method

1274

987

if value is None: # get

1275

988

return dbus.Boolean(self.approved_by_default)

1276

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))

1277

993

1278

994

# ApprovalDelay - property

1279

995

@dbus_service_property(_interface, signature="t",

1282

998

if value is None: # get

1283

999

return dbus.UInt64(self.approval_delay_milliseconds())

1284

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))

1285

1004

1286

1005

# ApprovalDuration - property

1287

1006

@dbus_service_property(_interface, signature="t",

1288

1007

access="readwrite")

1289

1008

def ApprovalDuration_dbus_property(self, value=None):

1290

1009

if value is None: # get

1291

return dbus.UInt64(timedelta_to_milliseconds(

1010

return dbus.UInt64(self._timedelta_to_milliseconds(

1292

1011

self.approval_duration))

1293

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))

1294

1016

1295

1017

# Name - property

1296

1018

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

1308

1030

def Host_dbus_property(self, value=None):

1309

1031

if value is None: # get

1310

1032

return dbus.String(self.host)

1311

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))

1312

1037

1313

1038

# Created - property

1314

1039

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

1315

1040

def Created_dbus_property(self):

1316

return datetime_to_dbus(self.created)

1041

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

1317

1042

1318

1043

# LastEnabled - property

1319

1044

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

1320

1045

def LastEnabled_dbus_property(self):

1321

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))

1322

1049

1323

1050

# Enabled - property

1324

1051

@dbus_service_property(_interface, signature="b",

1338

1065

if value is not None:

1339

1066

self.checked_ok()

1340

1067

return

1341

return datetime_to_dbus(self.last_checked_ok)

1342

1343

# Expires - property

1344

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

1345

def Expires_dbus_property(self):

1346

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))

1347

1072

1348

1073

# LastApprovalRequest - property

1349

1074

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

1350

1075

def LastApprovalRequest_dbus_property(self):

1351

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))

1352

1081

1353

1082

# Timeout - property

1354

1083

@dbus_service_property(_interface, signature="t",

1357

1086

if value is None: # get

1358

1087

return dbus.UInt64(self.timeout_milliseconds())

1359

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))

1360

1092

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

1361

1093

return

1362

1094

# Reschedule timeout

1363

1095

gobject.source_remove(self.disable_initiator_tag)

1364

1096

self.disable_initiator_tag = None

1365

self.expires = None

1366

time_to_die = timedelta_to_milliseconds((self

1367

.last_checked_ok

1368

+ self.timeout)

1369

- datetime.datetime

1370

.utcnow())

1097

time_to_die = (self.

1098

_timedelta_to_milliseconds((self

1099

.last_checked_ok

1100

+ self.timeout)

1101

- datetime.datetime

1102

.utcnow()))

1371

1103

if time_to_die <= 0:

1372

1104

# The timeout has passed

1373

1105

self.disable()

1374

1106

else:

1375

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

1376

+ datetime.timedelta(milliseconds =

1377

time_to_die))

1378

1107

self.disable_initiator_tag = (gobject.timeout_add

1379

1108

(time_to_die, self.disable))

1380

1109

1381

# ExtendedTimeout - property

1382

@dbus_service_property(_interface, signature="t",

1383

access="readwrite")

1384

def ExtendedTimeout_dbus_property(self, value=None):

1385

if value is None: # get

1386

return dbus.UInt64(self.extended_timeout_milliseconds())

1387

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

1388

1389

1110

# Interval - property

1390

1111

@dbus_service_property(_interface, signature="t",

1391

1112

access="readwrite")

1393

1114

if value is None: # get

1394

1115

return dbus.UInt64(self.interval_milliseconds())

1395

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))

1396

1120

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

1397

1121

return

1398

if self.enabled:

1399

# Reschedule checker run

1400

gobject.source_remove(self.checker_initiator_tag)

1401

self.checker_initiator_tag = (gobject.timeout_add

1402

(value, self.start_checker))

1403

self.start_checker() # Start one now, too

1404

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

1405

1128

# Checker - property

1406

1129

@dbus_service_property(_interface, signature="s",

1407

1130

access="readwrite")

1408

1131

def Checker_dbus_property(self, value=None):

1409

1132

if value is None: # get

1410

1133

return dbus.String(self.checker_command)

1411

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))

1412

1139

1413

1140

# CheckerRunning - property

1414

1141

@dbus_service_property(_interface, signature="b",

1441

1168

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

1442

1169

if not self._pipe.recv():

1443

1170

raise KeyError()

1444

1171

1445

1172

def __getattribute__(self, name):

1446

if name == '_pipe':

1173

if(name == '_pipe'):

1447

1174

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

1448

1175

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

1449

1176

data = self._pipe.recv()

1454

1181

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

1455

1182

return self._pipe.recv()[1]

1456

1183

return func

1457

1184

1458

1185

def __setattr__(self, name, value):

1459

if name == '_pipe':

1186

if(name == '_pipe'):

1460

1187

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

1461

1188

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

1462

1189

1463

1190

1464

class ClientDBusTransitional(ClientDBus):

1465

__metaclass__ = AlternateDBusNamesMetaclass

1466

1467

1468

1191

class ClientHandler(socketserver.BaseRequestHandler, object):

1469

1192

"""A class to handle client connections.

1470

1193

1477

1200

unicode(self.client_address))

1478

1201

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

1479

1202

self.server.child_pipe.fileno())

1480

1203

1481

1204

session = (gnutls.connection

1482

1205

.ClientSession(self.request,

1483

1206

gnutls.connection

1484

1207

.X509Credentials()))

1485

1208

1486

1209

# Note: gnutls.connection.X509Credentials is really a

1487

1210

# generic GnuTLS certificate credentials object so long as

1488

1211

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

1489

1212

# here despite using OpenPGP certificates.

1490

1213

1491

1214

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

1492

1215

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

1493

1216

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

1499

1222

(gnutls.library.functions

1500

1223

.gnutls_priority_set_direct(session._c_object,

1501

1224

priority, None))

1502

1225

1503

1226

# Start communication using the Mandos protocol

1504

1227

# Get protocol number

1505

1228

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

1510

1233

except (ValueError, IndexError, RuntimeError) as error:

1511

1234

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

1512

1235

return

1513

1236

1514

1237

# Start GnuTLS connection

1515

1238

try:

1516

1239

session.handshake()

1520

1243

# established. Just abandon the request.

1521

1244

return

1522

1245

logger.debug("Handshake succeeded")

1523

1246

1524

1247

approval_required = False

1525

1248

try:

1526

1249

try:

1531

1254

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

1532

1255

return

1533

1256

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

1534

1257

1535

1258

try:

1536

1259

client = ProxyClient(child_pipe, fpr,

1537

1260

self.client_address)

1538

1261

except KeyError:

1539

1262

return

1540

1263

1541

if self.server.use_dbus:

1542

# Emit D-Bus signal

1543

client.NewRequest(str(self.client_address))

1544

1545

1264

if client.approval_delay:

1546

1265

delay = client.approval_delay

1547

1266

client.approvals_pending += 1

1553

1272

client.name)

1554

1273

if self.server.use_dbus:

1555

1274

# Emit D-Bus signal

1556

client.Rejected("Disabled")

1275

client.Rejected("Disabled")

1557

1276

return

1558

1277

1559

if client.approved or not client.approval_delay:

1278

if client._approved or not client.approval_delay:

1560

1279

#We are approved or approval is disabled

1561

1280

break

1562

elif client.approved is None:

1281

elif client._approved is None:

1563

1282

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

1564

1283

client.name)

1565

1284

if self.server.use_dbus:

1576

1295

return

1577

1296

1578

1297

#wait until timeout or approved

1298

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

1579

1299

time = datetime.datetime.now()

1580

1300

client.changedstate.acquire()

1581

(client.changedstate.wait

1582

(float(client.timedelta_to_milliseconds(delay)

1583

/ 1000)))

1301

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

1584

1302

client.changedstate.release()

1585

1303

time2 = datetime.datetime.now()

1586

1304

if (time2 - time) >= delay:

1608

1326

sent, len(client.secret)

1609

1327

- (sent_size + sent))

1610

1328

sent_size += sent

1611

1329

1612

1330

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

1613

# bump the timeout using extended_timeout

1614

client.checked_ok(client.extended_timeout)

1331

# bump the timeout as if seen

1332

client.checked_ok()

1615

1333

if self.server.use_dbus:

1616

1334

# Emit D-Bus signal

1617

1335

client.GotSecret()

1684

1402

# Convert the buffer to a Python bytestring

1685

1403

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

1686

1404

# Convert the bytestring to hexadecimal notation

1687

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

1405

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

1688

1406

return hex_fpr

1689

1407

1690

1408

1693

1411

def sub_process_main(self, request, address):

1694

1412

try:

1695

1413

self.finish_request(request, address)

1696

except Exception:

1414

except:

1697

1415

self.handle_error(request, address)

1698

1416

self.close_request(request)

1699

1417

1700

1418

def process_request(self, request, address):

1701

1419

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

1702

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

1703

args = (request,

1704

address))

1705

proc.start()

1706

return proc

1707

1420

multiprocessing.Process(target = self.sub_process_main,

1421

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

1708

1422

1709

1423

class MultiprocessingMixInWithPipe(MultiprocessingMixIn, object):

1710

1424

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

1714

1428

This function creates a new pipe in self.pipe

1715

1429

"""

1716

1430

parent_pipe, self.child_pipe = multiprocessing.Pipe()

1717

1718

proc = MultiprocessingMixIn.process_request(self, request,

1719

client_address)

1431

1432

super(MultiprocessingMixInWithPipe,

1433

self).process_request(request, client_address)

1720

1434

self.child_pipe.close()

1721

self.add_pipe(parent_pipe, proc)

1722

1723

def add_pipe(self, parent_pipe, proc):

1435

self.add_pipe(parent_pipe)

1436

1437

def add_pipe(self, parent_pipe):

1724

1438

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

1725

1439

raise NotImplementedError

1726

1440

1727

1728

1441

class IPv6_TCPServer(MultiprocessingMixInWithPipe,

1729

1442

socketserver.TCPServer, object):

1730

1443

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

1804

1517

self.enabled = False

1805

1518

self.clients = clients

1806

1519

if self.clients is None:

1807

self.clients = {}

1520

self.clients = set()

1808

1521

self.use_dbus = use_dbus

1809

1522

self.gnutls_priority = gnutls_priority

1810

1523

IPv6_TCPServer.__init__(self, server_address,

1814

1527

def server_activate(self):

1815

1528

if self.enabled:

1816

1529

return socketserver.TCPServer.server_activate(self)

1817

1818

1530

def enable(self):

1819

1531

self.enabled = True

1820

1821

def add_pipe(self, parent_pipe, proc):

1532

def add_pipe(self, parent_pipe):

1822

1533

# Call "handle_ipc" for both data and EOF events

1823

1534

gobject.io_add_watch(parent_pipe.fileno(),

1824

1535

gobject.IO_IN | gobject.IO_HUP,

1825

1536

functools.partial(self.handle_ipc,

1826

parent_pipe =

1827

parent_pipe,

1828

proc = proc))

1829

1537

parent_pipe = parent_pipe))

1538

1830

1539

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

1831

proc = None, client_object=None):

1540

client_object=None):

1832

1541

condition_names = {

1833

1542

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

1834

1543

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

1843

1552

for cond, name in

1844

1553

condition_names.iteritems()

1845

1554

if cond & condition)

1846

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

1555

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

1847

1556

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

1848

# Wait for other process to exit

1849

proc.join()

1850

1557

return False

1851

1558

1852

1559

# Read a request from the child

1857

1564

fpr = request[1]

1858

1565

address = request[2]

1859

1566

1860

for c in self.clients.itervalues():

1567

for c in self.clients:

1861

1568

if c.fingerprint == fpr:

1862

1569

client = c

1863

1570

break

1866

1573

"dress: %s", fpr, address)

1867

1574

if self.use_dbus:

1868

1575

# Emit D-Bus signal

1869

mandos_dbus_service.ClientNotFound(fpr,

1870

address[0])

1576

mandos_dbus_service.ClientNotFound(fpr, address[0])

1871

1577

parent_pipe.send(False)

1872

1578

return False

1873

1579

1874

1580

gobject.io_add_watch(parent_pipe.fileno(),

1875

1581

gobject.IO_IN | gobject.IO_HUP,

1876

1582

functools.partial(self.handle_ipc,

1877

parent_pipe =

1878

parent_pipe,

1879

proc = proc,

1880

client_object =

1881

client))

1583

parent_pipe = parent_pipe,

1584

client_object = client))

1882

1585

parent_pipe.send(True)

1883

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

1884

# same fileno

1586

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

1885

1587

return False

1886

1588

if command == 'funcall':

1887

1589

funcname = request[1]

1888

1590

args = request[2]

1889

1591

kwargs = request[3]

1890

1592

1891

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

1892

funcname)(*args,

1893

**kwargs)))

1894

1593

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

1594

1895

1595

if command == 'getattr':

1896

1596

attrname = request[1]

1897

1597

if callable(client_object.__getattribute__(attrname)):

1898

1598

parent_pipe.send(('function',))

1899

1599

else:

1900

parent_pipe.send(('data', client_object

1901

.__getattribute__(attrname)))

1600

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

1902

1601

1903

1602

if command == 'setattr':

1904

1603

attrname = request[1]

1905

1604

value = request[2]

1906

1605

setattr(client_object, attrname, value)

1907

1606

1908

1607

return True

1909

1608

1910

1609

1947

1646

return timevalue

1948

1647

1949

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

1950

1673

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

1951

1674

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

1952

1675

2007

1730

" system bus interface")

2008

1731

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

2009

1732

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

2010

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

2011

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

2012

" state")

2013

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

2014

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

2015

2016

1733

options = parser.parse_args()

2017

1734

2018

1735

if options.check:

2031

1748

"use_dbus": "True",

2032

1749

"use_ipv6": "True",

2033

1750

"debuglevel": "",

2034

"restore": "True",

2035

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

2036

1751

}

2037

1752

2038

1753

# Parse config file for server-global settings

2055

1770

# options, if set.

2056

1771

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

2057

1772

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

2058

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

2059

"statedir"):

1773

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

2060

1774

value = getattr(options, option)

2061

1775

if value is not None:

2062

1776

server_settings[option] = value

2074

1788

debuglevel = server_settings["debuglevel"]

2075

1789

use_dbus = server_settings["use_dbus"]

2076

1790

use_ipv6 = server_settings["use_ipv6"]

2077

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

2078

stored_state_file)

2079

2080

if debug:

2081

initlogger(logging.DEBUG)

2082

else:

2083

if not debuglevel:

2084

initlogger()

2085

else:

2086

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

2087

initlogger(level)

2088

1791

2089

1792

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

2090

1793

syslogger.setFormatter(logging.Formatter

2091

1794

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

2093

1796

% server_settings["servicename"]))

2094

1797

2095

1798

# Parse config file with clients

2096

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)

2097

1807

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

2098

1808

"clients.conf"))

2099

1809

2137

1847

if error[0] != errno.EPERM:

2138

1848

raise error

2139

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

2140

1858

if debug:

2141

1859

# Enable all possible GnuTLS debugging

2142

1860

2173

1891

# End of Avahi example code

2174

1892

if use_dbus:

2175

1893

try:

2176

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

1894

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

2177

1895

bus, do_not_queue=True)

2178

old_bus_name = (dbus.service.BusName

2179

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

2180

do_not_queue=True))

2181

1896

except dbus.exceptions.NameExistsException as e:

2182

1897

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

2183

1898

use_dbus = False

2184

1899

server_settings["use_dbus"] = False

2185

1900

tcp_server.use_dbus = False

2186

1901

protocol = avahi.PROTO_INET6 if use_ipv6 else avahi.PROTO_INET

2187

service = AvahiServiceToSyslog(name =

2188

server_settings["servicename"],

2189

servicetype = "_mandos._tcp",

2190

protocol = protocol, bus = bus)

1902

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

1903

servicetype = "_mandos._tcp",

1904

protocol = protocol, bus = bus)

2191

1905

if server_settings["interface"]:

2192

1906

service.interface = (if_nametoindex

2193

1907

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

2197

1911

2198

1912

client_class = Client

2199

1913

if use_dbus:

2200

client_class = functools.partial(ClientDBusTransitional,

2201

bus = bus)

2202

2203

client_settings = Client.config_parser(client_config)

2204

old_client_settings = {}

2205

clients_data = {}

2206

2207

# Get client data and settings from last running state.

2208

if server_settings["restore"]:

2209

try:

2210

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

2211

clients_data, old_client_settings = (pickle.load

2212

(stored_state))

2213

os.remove(stored_state_path)

2214

except IOError as e:

2215

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

2216

.format(e))

2217

if e.errno != errno.ENOENT:

2218

raise

2219

2220

with PGPEngine() as pgp:

2221

for client_name, client in clients_data.iteritems():

2222

# Decide which value to use after restoring saved state.

2223

# We have three different values: Old config file,

2224

# new config file, and saved state.

2225

# New config value takes precedence if it differs from old

2226

# config value, otherwise use saved state.

2227

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

2228

try:

2229

# For each value in new config, check if it

2230

# differs from the old config value (Except for

2231

# the "secret" attribute)

2232

if (name != "secret" and

2233

value != old_client_settings[client_name]

2234

[name]):

2235

client[name] = value

2236

except KeyError:

2237

pass

2238

2239

# Clients who has passed its expire date can still be

2240

# enabled if its last checker was successful. Clients

2241

# whose checker failed before we stored its state is

2242

# assumed to have failed all checkers during downtime.

2243

if client["enabled"]:

2244

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

2245

if not client["last_checked_ok"]:

2246

logger.warning(

2247

"disabling client {0} - Client never "

2248

"performed a successfull checker"

2249

.format(client["name"]))

2250

client["enabled"] = False

2251

elif client["last_checker_status"] != 0:

2252

logger.warning(

2253

"disabling client {0} - Client "

2254

"last checker failed with error code {1}"

2255

.format(client["name"],

2256

client["last_checker_status"]))

2257

client["enabled"] = False

2258

else:

2259

client["expires"] = (datetime.datetime

2260

.utcnow()

2261

+ client["timeout"])

2262

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):

2263

1922

try:

2264

client["secret"] = (

2265

pgp.decrypt(client["encrypted_secret"],

2266

client_settings[client_name]

2267

["secret"]))

2268

except PGPError:

2269

# If decryption fails, we use secret from new settings

2270

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

2271

.format(client_name))

2272

client["secret"] = (

2273

client_settings[client_name]["secret"])

2274

2275

2276

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

2277

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

2278

del clients_data[client_name]

2279

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

2280

clients_data[client_name] = client_settings[client_name]

2281

2282

# Create clients all clients

2283

for client_name, client in clients_data.iteritems():

2284

tcp_server.clients[client_name] = client_class(

2285

name = client_name, settings = client)

2286

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()))

2287

1932

if not tcp_server.clients:

2288

1933

logger.warning("No clients defined")

2289

1934

2300

1945

# "pidfile" was never created

2301

1946

pass

2302

1947

del pidfilename

1948

2303

1949

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

2304

1950

2305

1951

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

2306

1952

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

2307

1953

2310

1956

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

2311

1957

def __init__(self):

2312

1958

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

2313

_interface = "se.recompile.Mandos"

1959

_interface = "se.bsnet.fukt.Mandos"

2314

1960

2315

1961

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

2316

1962

def ClientAdded(self, objpath):

2331

1977

def GetAllClients(self):

2332

1978

"D-Bus method"

2333

1979

return dbus.Array(c.dbus_object_path

2334

for c in

2335

tcp_server.clients.itervalues())

1980

for c in tcp_server.clients)

2336

1981

2337

1982

@dbus.service.method(_interface,

2338

1983

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

2340

1985

"D-Bus method"

2341

1986

return dbus.Dictionary(

2342

1987

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

2343

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

1988

for c in tcp_server.clients),

2344

1989

signature="oa{sv}")

2345

1990

2346

1991

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

2347

1992

def RemoveClient(self, object_path):

2348

1993

"D-Bus method"

2349

for c in tcp_server.clients.itervalues():

1994

for c in tcp_server.clients:

2350

1995

if c.dbus_object_path == object_path:

2351

del tcp_server.clients[c.name]

1996

tcp_server.clients.remove(c)

2352

1997

c.remove_from_connection()

2353

1998

# Don't signal anything except ClientRemoved

2354

1999

c.disable(quiet=True)

2359

2004

2360

2005

del _interface

2361

2006

2362

class MandosDBusServiceTransitional(MandosDBusService):

2363

__metaclass__ = AlternateDBusNamesMetaclass

2364

mandos_dbus_service = MandosDBusServiceTransitional()

2007

mandos_dbus_service = MandosDBusService()

2365

2008

2366

2009

def cleanup():

2367

2010

"Cleanup function; run on exit"

2368

2011

service.cleanup()

2369

2012

2370

multiprocessing.active_children()

2371

if not (tcp_server.clients or client_settings):

2372

return

2373

2374

# Store client before exiting. Secrets are encrypted with key

2375

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

2376

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

2377

clients = {}

2378

with PGPEngine() as pgp:

2379

for client in tcp_server.clients.itervalues():

2380

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

2381

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

2382

key)

2383

client_dict = {}

2384

2385

# A list of attributes that can not be pickled

2386

# + secret.

2387

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

2388

"checker"))

2389

for name, typ in (inspect.getmembers

2390

(dbus.service.Object)):

2391

exclude.add(name)

2392

2393

client_dict["encrypted_secret"] = (client

2394

.encrypted_secret)

2395

for attr in client.client_structure:

2396

if attr not in exclude:

2397

client_dict[attr] = getattr(client, attr)

2398

2399

clients[client.name] = client_dict

2400

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

2401

2402

try:

2403

with os.fdopen(os.open(stored_state_path,

2404

os.O_CREAT|os.O_WRONLY|os.O_TRUNC,

2405

0600), "wb") as stored_state:

2406

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

2407

except (IOError, OSError) as e:

2408

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

2409

.format(e))

2410

if e.errno not in (errno.ENOENT, errno.EACCES):

2411

raise

2412

2413

# Delete all clients, and settings from config

2414

2013

while tcp_server.clients:

2415

name, client = tcp_server.clients.popitem()

2014

client = tcp_server.clients.pop()

2416

2015

if use_dbus:

2417

2016

client.remove_from_connection()

2017

client.disable_hook = None

2418

2018

# Don't signal anything except ClientRemoved

2419

2019

client.disable(quiet=True)

2420

2020

if use_dbus:

2421

2021

# Emit D-Bus signal

2422

mandos_dbus_service.ClientRemoved(client

2423

.dbus_object_path,

2022

mandos_dbus_service.ClientRemoved(client.dbus_object_path,

2424

2023

client.name)

2425

client_settings.clear()

2426

2024

2427

2025

atexit.register(cleanup)

2428

2026

2429

for client in tcp_server.clients.itervalues():

2027

for client in tcp_server.clients:

2430

2028

if use_dbus:

2431

2029

# Emit D-Bus signal

2432

2030

mandos_dbus_service.ClientAdded(client.dbus_object_path)

2433

# Need to initiate checking of clients

2434

if client.enabled:

2435

client.init_checker()

2031

client.enable()

2436

2032

2437

2033

tcp_server.enable()

2438

2034

tcp_server.server_activate()