/mandos/trunk : revision 539

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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@fukt.bsnet.se>.

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# Contact the authors at <mandos@recompile.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 = "1.3.0"

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#logger = logging.getLogger('mandos')

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logger = logging.Logger('mandos')

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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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syslogger = (logging.handlers.SysLogHandler

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(facility = logging.handlers.SysLogHandler.LOG_DAEMON,

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

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syslogger.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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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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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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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.GetAlternativeServiceName(self.name))

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self.name = unicode(self.server

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.GetAlternativeServiceName(self.name))

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

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self.name)

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syslogger.setFormatter(logging.Formatter

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

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

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% self.name))

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self.remove()

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try:

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self.add()

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avahi.DBUS_INTERFACE_ENTRY_GROUP)

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self.entry_group_state_changed_match = (

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self.group.connect_to_signal(

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'StateChanged', self .entry_group_state_changed))

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'StateChanged', self.entry_group_state_changed))

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

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self.name, self.type)

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self.group.AddService(

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328

try:

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self.group.Free()

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except (dbus.exceptions.UnknownMethodException,

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dbus.exceptions.DBusException) as e:

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dbus.exceptions.DBusException):

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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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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_enabled: datetime.datetime(); (UTC)

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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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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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433

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

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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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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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444

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def timeout_milliseconds(self):

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446

"Return the 'timeout' attribute in milliseconds"

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return self._timedelta_to_milliseconds(self.timeout)

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return timedelta_to_milliseconds(self.timeout)

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449

def extended_timeout_milliseconds(self):

450

"Return the 'extended_timeout' attribute in milliseconds"

451

return timedelta_to_milliseconds(self.extended_timeout)

318

452

319

453

def interval_milliseconds(self):

320

454

"Return the 'interval' attribute in milliseconds"

321

return self._timedelta_to_milliseconds(self.interval)

322

455

return timedelta_to_milliseconds(self.interval)

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323

457

def approval_delay_milliseconds(self):

324

return self._timedelta_to_milliseconds(self.approval_delay)

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

458

return timedelta_to_milliseconds(self.approval_delay)

459

460

@staticmethod

461

def config_parser(config):

462

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

463

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

464

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

465

settings = {}

466

for client_name in config.sections():

467

section = dict(config.items(client_name))

468

client = settings[client_name] = {}

469

470

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

471

# Reformat values from string types to Python types

472

client["approved_by_default"] = config.getboolean(

473

client_name, "approved_by_default")

474

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

475

476

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

477

.replace(" ", ""))

478

if "secret" in section:

479

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

480

elif "secfile" in section:

481

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

482

(section["secfile"])),

483

"rb") as secfile:

484

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

485

else:

486

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

487

% section)

488

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

489

client["extended_timeout"] = string_to_delta(

490

section["extended_timeout"])

491

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

492

client["approval_delay"] = string_to_delta(

493

section["approval_delay"])

494

client["approval_duration"] = string_to_delta(

495

section["approval_duration"])

496

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

497

client["last_approval_request"] = None

498

client["last_checked_ok"] = None

499

client["last_checker_status"] = None

500

if client["enabled"]:

501

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

502

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

503

+ client["timeout"])

504

else:

505

client["last_enabled"] = None

506

client["expires"] = None

507

508

return settings

509

510

511

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

327

512

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

328

513

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

329

514

attribute."""

330

515

self.name = name

331

if config is None:

332

config = {}

516

# adding all client settings

517

for setting, value in settings.iteritems():

518

setattr(self, setting, value)

519

333

520

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

334

521

# Uppercase and remove spaces from fingerprint for later

335

522

# comparison purposes with return value from the fingerprint()

336

523

# function

337

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

338

.replace(" ", ""))

339

524

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

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

525

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

526

527

# attributes specific for this server instance

359

528

self.checker = None

360

529

self.checker_initiator_tag = None

361

530

self.disable_initiator_tag = None

362

531

self.checker_callback_tag = None

363

self.checker_command = config["checker"]

364

532

self.current_checker_command = None

365

self.last_connect = None

366

self._approved = None

367

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

368

True)

533

self.approved = None

369

534

self.approvals_pending = 0

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())

535

self.changedstate = (multiprocessing_manager

536

.Condition(multiprocessing_manager

537

.Lock()))

538

self.client_structure = [attr for attr in

539

self.__dict__.iterkeys()

540

if not attr.startswith("_")]

541

self.client_structure.append("client_structure")

542

543

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

544

lambda obj:

545

isinstance(obj,

546

property)):

547

if not name.startswith("_"):

548

self.client_structure.append(name)

375

549

550

# Send notice to process children that client state has changed

376

551

def send_changedstate(self):

377

self.changedstate.acquire()

378

self.changedstate.notify_all()

379

self.changedstate.release()

380

552

with self.changedstate:

553

self.changedstate.notify_all()

554

381

555

def enable(self):

382

556

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

383

557

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

384

558

# Already enabled

385

559

return

386

560

self.send_changedstate()

561

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

562

self.enabled = True

387

563

self.last_enabled = datetime.datetime.utcnow()

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

self.init_checker()

400

565

401

566

def disable(self, quiet=True):

402

567

"""Disable this client."""

409

574

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

410

575

gobject.source_remove(self.disable_initiator_tag)

411

576

self.disable_initiator_tag = None

577

self.expires = None

412

578

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

413

579

gobject.source_remove(self.checker_initiator_tag)

414

580

self.checker_initiator_tag = None

415

581

self.stop_checker()

416

if self.disable_hook:

417

self.disable_hook(self)

418

582

self.enabled = False

419

583

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

420

584

return False

421

585

422

586

def __del__(self):

423

self.disable_hook = None

424

587

self.disable()

425

588

589

def init_checker(self):

590

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

591

# and every interval from then on.

592

self.checker_initiator_tag = (gobject.timeout_add

593

(self.interval_milliseconds(),

594

self.start_checker))

595

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

596

self.disable_initiator_tag = (gobject.timeout_add

597

(self.timeout_milliseconds(),

598

self.disable))

599

# Also start a new checker *right now*.

600

self.start_checker()

601

426

602

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

427

603

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

428

604

self.checker_callback_tag = None

429

605

self.checker = None

430

606

if os.WIFEXITED(condition):

431

exitstatus = os.WEXITSTATUS(condition)

432

if exitstatus == 0:

607

self.last_checker_status = os.WEXITSTATUS(condition)

608

if self.last_checker_status == 0:

433

609

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

434

610

vars(self))

435

611

self.checked_ok()

437

613

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

438

614

vars(self))

439

615

else:

616

self.last_checker_status = -1

440

617

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

441

618

vars(self))

442

619

443

def checked_ok(self):

620

def checked_ok(self, timeout=None):

444

621

"""Bump up the timeout for this client.

445

622

446

623

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

447

624

alive and well.

448

625

"""

626

if timeout is None:

627

timeout = self.timeout

449

628

self.last_checked_ok = datetime.datetime.utcnow()

450

gobject.source_remove(self.disable_initiator_tag)

451

self.disable_initiator_tag = (gobject.timeout_add

452

(self.timeout_milliseconds(),

453

self.disable))

629

if self.disable_initiator_tag is not None:

630

gobject.source_remove(self.disable_initiator_tag)

631

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

632

self.disable_initiator_tag = (gobject.timeout_add

633

(timedelta_to_milliseconds

634

(timeout), self.disable))

635

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

454

636

455

637

def need_approval(self):

456

638

self.last_approval_request = datetime.datetime.utcnow()

496

678

'replace')))

497

679

for attr in

498

680

self.runtime_expansions)

499

681

500

682

try:

501

683

command = self.checker_command % escaped_attrs

502

684

except TypeError as error:

548

730

raise

549

731

self.checker = None

550

732

733

551

734

def dbus_service_property(dbus_interface, signature="v",

552

735

access="readwrite", byte_arrays=False):

553

736

"""Decorators for marking methods of a DBusObjectWithProperties to

599

782

600

783

class DBusObjectWithProperties(dbus.service.Object):

601

784

"""A D-Bus object with properties.

602

785

603

786

Classes inheriting from this can use the dbus_service_property

604

787

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

605

788

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

612

795

def _get_all_dbus_properties(self):

613

796

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

614

797

"""

615

return ((prop._dbus_name, prop)

798

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

799

for cls in self.__class__.__mro__

616

800

for name, prop in

617

inspect.getmembers(self, self._is_dbus_property))

801

inspect.getmembers(cls, self._is_dbus_property))

618

802

619

803

def _get_dbus_property(self, interface_name, property_name):

620

804

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

621

805

property with the specified name and interface.

622

806

"""

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

807

for cls in self.__class__.__mro__:

808

for name, value in (inspect.getmembers

809

(cls, self._is_dbus_property)):

810

if (value._dbus_name == property_name

811

and value._dbus_interface == interface_name):

812

return value.__get__(self)

813

633

814

# No such property

634

815

raise DBusPropertyNotFound(self.dbus_object_path + ":"

635

816

+ interface_name + "."

669

850

def GetAll(self, interface_name):

670

851

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

671

852

standard.

672

853

673

854

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

674

855

"""

675

all = {}

856

properties = {}

676

857

for name, prop in self._get_all_dbus_properties():

677

858

if (interface_name

678

859

and interface_name != prop._dbus_interface):

683

864

continue

684

865

value = prop()

685

866

if not hasattr(value, "variant_level"):

686

all[name] = value

867

properties[name] = value

687

868

continue

688

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

689

value.variant_level+1)

690

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

869

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

870

value.variant_level+1)

871

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

691

872

692

873

@dbus.service.method(dbus.INTROSPECTABLE_IFACE,

693

874

out_signature="s",

737

918

return xmlstring

738

919

739

920

921

def datetime_to_dbus (dt, variant_level=0):

922

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

923

if dt is None:

924

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

925

return dbus.String(dt.isoformat(),

926

variant_level=variant_level)

927

928

929

class AlternateDBusNamesMetaclass(DBusObjectWithProperties

930

.__metaclass__):

931

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

932

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

933

"""

934

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

935

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

936

# methods, signals, or properties in them

937

for base in (b for b in bases

938

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

939

# Go though all attributes of the base class

940

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

941

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

942

# with the wrong interface name

943

if (not hasattr(attribute, "_dbus_interface")

944

or not attribute._dbus_interface

945

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

946

continue

947

# Create an alternate D-Bus interface name based on

948

# the current name

949

alt_interface = (attribute._dbus_interface

950

.replace("se.recompile.Mandos",

951

"se.bsnet.fukt.Mandos"))

952

# Is this a D-Bus signal?

953

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

954

# Extract the original non-method function by

955

# black magic

956

nonmethod_func = (dict(

957

zip(attribute.func_code.co_freevars,

958

attribute.__closure__))["func"]

959

.cell_contents)

960

# Create a new, but exactly alike, function

961

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

962

# with the alternate D-Bus interface name

963

new_function = (dbus.service.signal

964

(alt_interface,

965

attribute._dbus_signature)

966

(types.FunctionType(

967

nonmethod_func.func_code,

968

nonmethod_func.func_globals,

969

nonmethod_func.func_name,

970

nonmethod_func.func_defaults,

971

nonmethod_func.func_closure)))

972

# Define a creator of a function to call both the

973

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

974

# signals gets sent when the function is called

975

def fixscope(func1, func2):

976

"""This function is a scope container to pass

977

func1 and func2 to the "call_both" function

978

outside of its arguments"""

979

def call_both(*args, **kwargs):

980

"""This function will emit two D-Bus

981

signals by calling func1 and func2"""

982

func1(*args, **kwargs)

983

func2(*args, **kwargs)

984

return call_both

985

# Create the "call_both" function and add it to

986

# the class

987

attr[attrname] = fixscope(attribute,

988

new_function)

989

# Is this a D-Bus method?

990

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

991

# Create a new, but exactly alike, function

992

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

993

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

994

# to the class.

995

attr[attrname] = (dbus.service.method

996

(alt_interface,

997

attribute._dbus_in_signature,

998

attribute._dbus_out_signature)

999

(types.FunctionType

1000

(attribute.func_code,

1001

attribute.func_globals,

1002

attribute.func_name,

1003

attribute.func_defaults,

1004

attribute.func_closure)))

1005

# Is this a D-Bus property?

1006

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

1007

# Create a new, but exactly alike, function

1008

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

1009

# property with the alternate D-Bus interface

1010

# name. Add it to the class.

1011

attr[attrname] = (dbus_service_property

1012

(alt_interface,

1013

attribute._dbus_signature,

1014

attribute._dbus_access,

1015

attribute

1016

._dbus_get_args_options

1017

["byte_arrays"])

1018

(types.FunctionType

1019

(attribute.func_code,

1020

attribute.func_globals,

1021

attribute.func_name,

1022

attribute.func_defaults,

1023

attribute.func_closure)))

1024

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

1025

1026

740

1027

class ClientDBus(Client, DBusObjectWithProperties):

741

1028

"""A Client class using D-Bus

742

1029

751

1038

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

752

1039

753

1040

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

754

self._approvals_pending = 0

755

1041

self.bus = bus

756

1042

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

1043

self._approvals_pending = 0

1044

1045

self._approvals_pending = 0

757

1046

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

758

1047

# the D-Bus

759

1048

client_object_name = unicode(self.name).translate(

764

1053

DBusObjectWithProperties.__init__(self, self.bus,

765

1054

self.dbus_object_path)

766

1055

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

1056

def notifychangeproperty(transform_func,

1057

dbus_name, type_func=lambda x: x,

1058

variant_level=1):

1059

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

1060

its changes to DBus.

1061

1062

transform_fun: Function that takes a value and a variant_level

1063

and transforms it to a D-Bus type.

1064

dbus_name: D-Bus name of the variable

1065

type_func: Function that transform the value before sending it

1066

to the D-Bus. Default: no transform

1067

variant_level: D-Bus variant level. Default: 1

1068

"""

1069

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

1070

def setter(self, value):

1071

if hasattr(self, "dbus_object_path"):

1072

if (not hasattr(self, attrname) or

1073

type_func(getattr(self, attrname, None))

1074

!= type_func(value)):

1075

dbus_value = transform_func(type_func(value),

1076

variant_level

1077

=variant_level)

1078

self.PropertyChanged(dbus.String(dbus_name),

1079

dbus_value)

1080

setattr(self, attrname, value)

1081

1082

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

1083

1084

1085

expires = notifychangeproperty(datetime_to_dbus, "Expires")

1086

approvals_pending = notifychangeproperty(dbus.Boolean,

1087

"ApprovalPending",

1088

type_func = bool)

1089

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

1090

last_enabled = notifychangeproperty(datetime_to_dbus,

1091

"LastEnabled")

1092

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

1093

type_func = lambda checker:

1094

checker is not None)

1095

last_checked_ok = notifychangeproperty(datetime_to_dbus,

1096

"LastCheckedOK")

1097

last_approval_request = notifychangeproperty(

1098

datetime_to_dbus, "LastApprovalRequest")

1099

approved_by_default = notifychangeproperty(dbus.Boolean,

1100

"ApprovedByDefault")

1101

approval_delay = notifychangeproperty(dbus.UInt64,

1102

"ApprovalDelay",

1103

type_func =

1104

timedelta_to_milliseconds)

1105

approval_duration = notifychangeproperty(

1106

dbus.UInt64, "ApprovalDuration",

1107

type_func = timedelta_to_milliseconds)

1108

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

1109

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

1110

type_func =

1111

timedelta_to_milliseconds)

1112

extended_timeout = notifychangeproperty(

1113

dbus.UInt64, "ExtendedTimeout",

1114

type_func = timedelta_to_milliseconds)

1115

interval = notifychangeproperty(dbus.UInt64,

1116

"Interval",

1117

type_func =

1118

timedelta_to_milliseconds)

1119

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

1120

1121

del notifychangeproperty

810

1122

811

1123

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

812

1124

try:

821

1133

*args, **kwargs):

822

1134

self.checker_callback_tag = None

823

1135

self.checker = None

824

# Emit D-Bus signal

825

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

826

dbus.Boolean(False, variant_level=1))

827

1136

if os.WIFEXITED(condition):

828

1137

exitstatus = os.WEXITSTATUS(condition)

829

1138

# Emit D-Bus signal

839

1148

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

840

1149

*args, **kwargs)

841

1150

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

859

1151

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

860

1152

old_checker = self.checker

861

1153

if self.checker is not None:

868

1160

and old_checker_pid != self.checker.pid):

869

1161

# Emit D-Bus signal

870

1162

self.CheckerStarted(self.current_checker_command)

871

self.PropertyChanged(

872

dbus.String("CheckerRunning"),

873

dbus.Boolean(True, variant_level=1))

874

1163

return r

875

1164

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

885

1165

def _reset_approved(self):

886

self._approved = None

1166

self.approved = None

887

1167

return False

888

1168

889

1169

def approve(self, value=True):

890

1170

self.send_changedstate()

891

self._approved = value

892

gobject.timeout_add(self._timedelta_to_milliseconds

1171

self.approved = value

1172

gobject.timeout_add(timedelta_to_milliseconds

893

1173

(self.approval_duration),

894

1174

self._reset_approved)

895

1175

896

1176

897

1177

## D-Bus methods, signals & properties

898

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

1178

_interface = "se.recompile.Mandos.Client"

899

1179

900

1180

## Signals

901

1181

938

1218

"D-Bus signal"

939

1219

return self.need_approval()

940

1220

1221

# NeRwequest - signal

1222

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

1223

def NewRequest(self, ip):

1224

"""D-Bus signal

1225

Is sent after a client request a password.

1226

"""

1227

pass

1228

941

1229

## Methods

942

1230

943

1231

# Approve - method

987

1275

if value is None: # get

988

1276

return dbus.Boolean(self.approved_by_default)

989

1277

self.approved_by_default = bool(value)

990

# Emit D-Bus signal

991

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

992

dbus.Boolean(value, variant_level=1))

993

1278

994

1279

# ApprovalDelay - property

995

1280

@dbus_service_property(_interface, signature="t",

998

1283

if value is None: # get

999

1284

return dbus.UInt64(self.approval_delay_milliseconds())

1000

1285

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))

1004

1286

1005

1287

# ApprovalDuration - property

1006

1288

@dbus_service_property(_interface, signature="t",

1007

1289

access="readwrite")

1008

1290

def ApprovalDuration_dbus_property(self, value=None):

1009

1291

if value is None: # get

1010

return dbus.UInt64(self._timedelta_to_milliseconds(

1292

return dbus.UInt64(timedelta_to_milliseconds(

1011

1293

self.approval_duration))

1012

1294

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))

1016

1295

1017

1296

# Name - property

1018

1297

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

1030

1309

def Host_dbus_property(self, value=None):

1031

1310

if value is None: # get

1032

1311

return dbus.String(self.host)

1033

self.host = value

1034

# Emit D-Bus signal

1035

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

1036

dbus.String(value, variant_level=1))

1312

self.host = unicode(value)

1037

1313

1038

1314

# Created - property

1039

1315

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

1040

1316

def Created_dbus_property(self):

1041

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

1317

return datetime_to_dbus(self.created)

1042

1318

1043

1319

# LastEnabled - property

1044

1320

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

1045

1321

def LastEnabled_dbus_property(self):

1046

if self.last_enabled is None:

1047

return dbus.String("")

1048

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

1322

return datetime_to_dbus(self.last_enabled)

1049

1323

1050

1324

# Enabled - property

1051

1325

@dbus_service_property(_interface, signature="b",

1065

1339

if value is not None:

1066

1340

self.checked_ok()

1067

1341

return

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))

1342

return datetime_to_dbus(self.last_checked_ok)

1343

1344

# Expires - property

1345

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

1346

def Expires_dbus_property(self):

1347

return datetime_to_dbus(self.expires)

1072

1348

1073

1349

# LastApprovalRequest - property

1074

1350

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

1075

1351

def LastApprovalRequest_dbus_property(self):

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

return datetime_to_dbus(self.last_approval_request)

1081

1353

1082

1354

# Timeout - property

1083

1355

@dbus_service_property(_interface, signature="t",

1086

1358

if value is None: # get

1087

1359

return dbus.UInt64(self.timeout_milliseconds())

1088

1360

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))

1092

1361

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

1093

1362

return

1094

1363

# Reschedule timeout

1095

1364

gobject.source_remove(self.disable_initiator_tag)

1096

1365

self.disable_initiator_tag = None

1097

time_to_die = (self.

1098

_timedelta_to_milliseconds((self

1099

.last_checked_ok

1100

+ self.timeout)

1101

- datetime.datetime

1102

.utcnow()))

1366

self.expires = None

1367

time_to_die = timedelta_to_milliseconds((self

1368

.last_checked_ok

1369

+ self.timeout)

1370

- datetime.datetime

1371

.utcnow())

1103

1372

if time_to_die <= 0:

1104

1373

# The timeout has passed

1105

1374

self.disable()

1106

1375

else:

1376

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

1377

+ datetime.timedelta(milliseconds =

1378

time_to_die))

1107

1379

self.disable_initiator_tag = (gobject.timeout_add

1108

1380

(time_to_die, self.disable))

1109

1381

1382

# ExtendedTimeout - property

1383

@dbus_service_property(_interface, signature="t",

1384

access="readwrite")

1385

def ExtendedTimeout_dbus_property(self, value=None):

1386

if value is None: # get

1387

return dbus.UInt64(self.extended_timeout_milliseconds())

1388

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

1389

1110

1390

# Interval - property

1111

1391

@dbus_service_property(_interface, signature="t",

1112

1392

access="readwrite")

1114

1394

if value is None: # get

1115

1395

return dbus.UInt64(self.interval_milliseconds())

1116

1396

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))

1120

1397

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

1121

1398

return

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

1399

if self.enabled:

1400

# Reschedule checker run

1401

gobject.source_remove(self.checker_initiator_tag)

1402

self.checker_initiator_tag = (gobject.timeout_add

1403

(value, self.start_checker))

1404

self.start_checker() # Start one now, too

1405

1128

1406

# Checker - property

1129

1407

@dbus_service_property(_interface, signature="s",

1130

1408

access="readwrite")

1131

1409

def Checker_dbus_property(self, value=None):

1132

1410

if value is None: # get

1133

1411

return dbus.String(self.checker_command)

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

self.checker_command = unicode(value)

1139

1413

1140

1414

# CheckerRunning - property

1141

1415

@dbus_service_property(_interface, signature="b",

1168

1442

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

1169

1443

if not self._pipe.recv():

1170

1444

raise KeyError()

1171

1445

1172

1446

def __getattribute__(self, name):

1173

if(name == '_pipe'):

1447

if name == '_pipe':

1174

1448

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

1175

1449

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

1176

1450

data = self._pipe.recv()

1181

1455

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

1182

1456

return self._pipe.recv()[1]

1183

1457

return func

1184

1458

1185

1459

def __setattr__(self, name, value):

1186

if(name == '_pipe'):

1460

if name == '_pipe':

1187

1461

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

1188

1462

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

1189

1463

1190

1464

1465

class ClientDBusTransitional(ClientDBus):

1466

__metaclass__ = AlternateDBusNamesMetaclass

1467

1468

1191

1469

class ClientHandler(socketserver.BaseRequestHandler, object):

1192

1470

"""A class to handle client connections.

1193

1471

1200

1478

unicode(self.client_address))

1201

1479

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

1202

1480

self.server.child_pipe.fileno())

1203

1481

1204

1482

session = (gnutls.connection

1205

1483

.ClientSession(self.request,

1206

1484

gnutls.connection

1207

1485

.X509Credentials()))

1208

1486

1209

1487

# Note: gnutls.connection.X509Credentials is really a

1210

1488

# generic GnuTLS certificate credentials object so long as

1211

1489

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

1212

1490

# here despite using OpenPGP certificates.

1213

1491

1214

1492

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

1215

1493

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

1216

1494

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

1222

1500

(gnutls.library.functions

1223

1501

.gnutls_priority_set_direct(session._c_object,

1224

1502

priority, None))

1225

1503

1226

1504

# Start communication using the Mandos protocol

1227

1505

# Get protocol number

1228

1506

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

1233

1511

except (ValueError, IndexError, RuntimeError) as error:

1234

1512

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

1235

1513

return

1236

1514

1237

1515

# Start GnuTLS connection

1238

1516

try:

1239

1517

session.handshake()

1243

1521

# established. Just abandon the request.

1244

1522

return

1245

1523

logger.debug("Handshake succeeded")

1246

1524

1247

1525

approval_required = False

1248

1526

try:

1249

1527

try:

1254

1532

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

1255

1533

return

1256

1534

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

1257

1535

1258

1536

try:

1259

1537

client = ProxyClient(child_pipe, fpr,

1260

1538

self.client_address)

1261

1539

except KeyError:

1262

1540

return

1263

1541

1542

if self.server.use_dbus:

1543

# Emit D-Bus signal

1544

client.NewRequest(str(self.client_address))

1545

1264

1546

if client.approval_delay:

1265

1547

delay = client.approval_delay

1266

1548

client.approvals_pending += 1

1272

1554

client.name)

1273

1555

if self.server.use_dbus:

1274

1556

# Emit D-Bus signal

1275

client.Rejected("Disabled")

1557

client.Rejected("Disabled")

1276

1558

return

1277

1559

1278

if client._approved or not client.approval_delay:

1560

if client.approved or not client.approval_delay:

1279

1561

#We are approved or approval is disabled

1280

1562

break

1281

elif client._approved is None:

1563

elif client.approved is None:

1282

1564

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

1283

1565

client.name)

1284

1566

if self.server.use_dbus:

1295

1577

return

1296

1578

1297

1579

#wait until timeout or approved

1298

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

1299

1580

time = datetime.datetime.now()

1300

1581

client.changedstate.acquire()

1301

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

1582

(client.changedstate.wait

1583

(float(client.timedelta_to_milliseconds(delay)

1584

/ 1000)))

1302

1585

client.changedstate.release()

1303

1586

time2 = datetime.datetime.now()

1304

1587

if (time2 - time) >= delay:

1326

1609

sent, len(client.secret)

1327

1610

- (sent_size + sent))

1328

1611

sent_size += sent

1329

1612

1330

1613

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

1331

# bump the timeout as if seen

1332

client.checked_ok()

1614

# bump the timeout using extended_timeout

1615

client.checked_ok(client.extended_timeout)

1333

1616

if self.server.use_dbus:

1334

1617

# Emit D-Bus signal

1335

1618

client.GotSecret()

1402

1685

# Convert the buffer to a Python bytestring

1403

1686

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

1404

1687

# Convert the bytestring to hexadecimal notation

1405

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

1688

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

1406

1689

return hex_fpr

1407

1690

1408

1691

1411

1694

def sub_process_main(self, request, address):

1412

1695

try:

1413

1696

self.finish_request(request, address)

1414

except:

1697

except Exception:

1415

1698

self.handle_error(request, address)

1416

1699

self.close_request(request)

1417

1700

1418

1701

def process_request(self, request, address):

1419

1702

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

1420

multiprocessing.Process(target = self.sub_process_main,

1421

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

1703

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

1704

args = (request,

1705

address))

1706

proc.start()

1707

return proc

1708

1422

1709

1423

1710

class MultiprocessingMixInWithPipe(MultiprocessingMixIn, object):

1424

1711

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

1428

1715

This function creates a new pipe in self.pipe

1429

1716

"""

1430

1717

parent_pipe, self.child_pipe = multiprocessing.Pipe()

1431

1432

super(MultiprocessingMixInWithPipe,

1433

self).process_request(request, client_address)

1718

1719

proc = MultiprocessingMixIn.process_request(self, request,

1720

client_address)

1434

1721

self.child_pipe.close()

1435

self.add_pipe(parent_pipe)

1436

1437

def add_pipe(self, parent_pipe):

1722

self.add_pipe(parent_pipe, proc)

1723

1724

def add_pipe(self, parent_pipe, proc):

1438

1725

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

1439

1726

raise NotImplementedError

1440

1727

1728

1441

1729

class IPv6_TCPServer(MultiprocessingMixInWithPipe,

1442

1730

socketserver.TCPServer, object):

1443

1731

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

1517

1805

self.enabled = False

1518

1806

self.clients = clients

1519

1807

if self.clients is None:

1520

self.clients = set()

1808

self.clients = {}

1521

1809

self.use_dbus = use_dbus

1522

1810

self.gnutls_priority = gnutls_priority

1523

1811

IPv6_TCPServer.__init__(self, server_address,

1527

1815

def server_activate(self):

1528

1816

if self.enabled:

1529

1817

return socketserver.TCPServer.server_activate(self)

1818

1530

1819

def enable(self):

1531

1820

self.enabled = True

1532

def add_pipe(self, parent_pipe):

1821

1822

def add_pipe(self, parent_pipe, proc):

1533

1823

# Call "handle_ipc" for both data and EOF events

1534

1824

gobject.io_add_watch(parent_pipe.fileno(),

1535

1825

gobject.IO_IN | gobject.IO_HUP,

1536

1826

functools.partial(self.handle_ipc,

1537

parent_pipe = parent_pipe))

1538

1827

parent_pipe =

1828

parent_pipe,

1829

proc = proc))

1830

1539

1831

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

1540

client_object=None):

1832

proc = None, client_object=None):

1541

1833

condition_names = {

1542

1834

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

1543

1835

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

1552

1844

for cond, name in

1553

1845

condition_names.iteritems()

1554

1846

if cond & condition)

1555

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

1847

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

1556

1848

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

1849

# Wait for other process to exit

1850

proc.join()

1557

1851

return False

1558

1852

1559

1853

# Read a request from the child

1564

1858

fpr = request[1]

1565

1859

address = request[2]

1566

1860

1567

for c in self.clients:

1861

for c in self.clients.itervalues():

1568

1862

if c.fingerprint == fpr:

1569

1863

client = c

1570

1864

break

1573

1867

"dress: %s", fpr, address)

1574

1868

if self.use_dbus:

1575

1869

# Emit D-Bus signal

1576

mandos_dbus_service.ClientNotFound(fpr, address[0])

1870

mandos_dbus_service.ClientNotFound(fpr,

1871

address[0])

1577

1872

parent_pipe.send(False)

1578

1873

return False

1579

1874

1580

1875

gobject.io_add_watch(parent_pipe.fileno(),

1581

1876

gobject.IO_IN | gobject.IO_HUP,

1582

1877

functools.partial(self.handle_ipc,

1583

parent_pipe = parent_pipe,

1584

client_object = client))

1878

parent_pipe =

1879

parent_pipe,

1880

proc = proc,

1881

client_object =

1882

client))

1585

1883

parent_pipe.send(True)

1586

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

1884

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

1885

# same fileno

1587

1886

return False

1588

1887

if command == 'funcall':

1589

1888

funcname = request[1]

1590

1889

args = request[2]

1591

1890

kwargs = request[3]

1592

1891

1593

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

1594

1892

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

1893

funcname)(*args,

1894

**kwargs)))

1895

1595

1896

if command == 'getattr':

1596

1897

attrname = request[1]

1597

1898

if callable(client_object.__getattribute__(attrname)):

1598

1899

parent_pipe.send(('function',))

1599

1900

else:

1600

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

1901

parent_pipe.send(('data', client_object

1902

.__getattribute__(attrname)))

1601

1903

1602

1904

if command == 'setattr':

1603

1905

attrname = request[1]

1604

1906

value = request[2]

1605

1907

setattr(client_object, attrname, value)

1606

1908

1607

1909

return True

1608

1910

1609

1911

1646

1948

return timevalue

1647

1949

1648

1950

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

1673

1951

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

1674

1952

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

1675

1953

1730

2008

" system bus interface")

1731

2009

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

1732

2010

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

2011

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

2012

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

2013

" state")

2014

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

2015

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

2016

1733

2017

options = parser.parse_args()

1734

2018

1735

2019

if options.check:

1748

2032

"use_dbus": "True",

1749

2033

"use_ipv6": "True",

1750

2034

"debuglevel": "",

2035

"restore": "True",

2036

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

1751

2037

}

1752

2038

1753

2039

# Parse config file for server-global settings

1770

2056

# options, if set.

1771

2057

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

1772

2058

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

1773

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

2059

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

2060

"statedir"):

1774

2061

value = getattr(options, option)

1775

2062

if value is not None:

1776

2063

server_settings[option] = value

1788

2075

debuglevel = server_settings["debuglevel"]

1789

2076

use_dbus = server_settings["use_dbus"]

1790

2077

use_ipv6 = server_settings["use_ipv6"]

1791

2078

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

2079

stored_state_file)

2080

2081

if debug:

2082

initlogger(debug, logging.DEBUG)

2083

else:

2084

if not debuglevel:

2085

initlogger(debug)

2086

else:

2087

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

2088

initlogger(debug, level)

2089

1792

2090

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

1793

2091

syslogger.setFormatter(logging.Formatter

1794

2092

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

1796

2094

% server_settings["servicename"]))

1797

2095

1798

2096

# Parse config file with clients

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

client_config = configparser.SafeConfigParser(Client.client_defaults)

1807

2098

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

1808

2099

"clients.conf"))

1809

2100

1847

2138

if error[0] != errno.EPERM:

1848

2139

raise error

1849

2140

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

1858

2141

if debug:

1859

2142

# Enable all possible GnuTLS debugging

1860

2143

1874

2157

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

1875

2158

if null > 2:

1876

2159

os.close(null)

1877

else:

1878

# No console logging

1879

logger.removeHandler(console)

1880

2160

1881

2161

# Need to fork before connecting to D-Bus

1882

2162

if not debug:

1883

2163

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

1884

2164

daemon()

1885

2165

2166

gobject.threads_init()

2167

1886

2168

global main_loop

1887

2169

# From the Avahi example code

1888

2170

DBusGMainLoop(set_as_default=True )

1891

2173

# End of Avahi example code

1892

2174

if use_dbus:

1893

2175

try:

1894

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

2176

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

1895

2177

bus, do_not_queue=True)

2178

old_bus_name = (dbus.service.BusName

2179

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

2180

do_not_queue=True))

1896

2181

except dbus.exceptions.NameExistsException as e:

1897

2182

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

1898

2183

use_dbus = False

1899

2184

server_settings["use_dbus"] = False

1900

2185

tcp_server.use_dbus = False

1901

2186

protocol = avahi.PROTO_INET6 if use_ipv6 else avahi.PROTO_INET

1902

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

1903

servicetype = "_mandos._tcp",

1904

protocol = protocol, bus = bus)

2187

service = AvahiServiceToSyslog(name =

2188

server_settings["servicename"],

2189

servicetype = "_mandos._tcp",

2190

protocol = protocol, bus = bus)

1905

2191

if server_settings["interface"]:

1906

2192

service.interface = (if_nametoindex

1907

2193

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

1911

2197

1912

2198

client_class = Client

1913

2199

if use_dbus:

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):

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

except EOFError as e:

2220

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

2221

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

2222

2223

with PGPEngine() as pgp:

2224

for client_name, client in clients_data.iteritems():

2225

# Decide which value to use after restoring saved state.

2226

# We have three different values: Old config file,

2227

# new config file, and saved state.

2228

# New config value takes precedence if it differs from old

2229

# config value, otherwise use saved state.

2230

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

2231

try:

2232

# For each value in new config, check if it

2233

# differs from the old config value (Except for

2234

# the "secret" attribute)

2235

if (name != "secret" and

2236

value != old_client_settings[client_name]

2237

[name]):

2238

client[name] = value

2239

except KeyError:

2240

pass

2241

2242

# Clients who has passed its expire date can still be

2243

# enabled if its last checker was successful. Clients

2244

# whose checker failed before we stored its state is

2245

# assumed to have failed all checkers during downtime.

2246

if client["enabled"]:

2247

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

2248

if not client["last_checked_ok"]:

2249

logger.warning(

2250

"disabling client {0} - Client never "

2251

"performed a successfull checker"

2252

.format(client["name"]))

2253

client["enabled"] = False

2254

elif client["last_checker_status"] != 0:

2255

logger.warning(

2256

"disabling client {0} - Client "

2257

"last checker failed with error code {1}"

2258

.format(client["name"],

2259

client["last_checker_status"]))

2260

client["enabled"] = False

2261

else:

2262

client["expires"] = (datetime.datetime

2263

.utcnow()

2264

+ client["timeout"])

2265

1922

2266

try:

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()))

2267

client["secret"] = (

2268

pgp.decrypt(client["encrypted_secret"],

2269

client_settings[client_name]

2270

["secret"]))

2271

except PGPError:

2272

# If decryption fails, we use secret from new settings

2273

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

2274

.format(client_name))

2275

client["secret"] = (

2276

client_settings[client_name]["secret"])

2277

2278

2279

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

2280

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

2281

del clients_data[client_name]

2282

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

2283

clients_data[client_name] = client_settings[client_name]

2284

2285

# Create clients all clients

2286

for client_name, client in clients_data.iteritems():

2287

tcp_server.clients[client_name] = client_class(

2288

name = client_name, settings = client)

2289

1932

2290

if not tcp_server.clients:

1933

2291

logger.warning("No clients defined")

1934

2292

1945

2303

# "pidfile" was never created

1946

2304

pass

1947

2305

del pidfilename

1948

1949

2306

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

1950

2307

1951

2308

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

1952

2309

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

1953

2310

1956

2313

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

1957

2314

def __init__(self):

1958

2315

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

1959

_interface = "se.bsnet.fukt.Mandos"

2316

_interface = "se.recompile.Mandos"

1960

2317

1961

2318

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

1962

2319

def ClientAdded(self, objpath):

1977

2334

def GetAllClients(self):

1978

2335

"D-Bus method"

1979

2336

return dbus.Array(c.dbus_object_path

1980

for c in tcp_server.clients)

2337

for c in

2338

tcp_server.clients.itervalues())

1981

2339

1982

2340

@dbus.service.method(_interface,

1983

2341

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

1985

2343

"D-Bus method"

1986

2344

return dbus.Dictionary(

1987

2345

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

1988

for c in tcp_server.clients),

2346

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

1989

2347

signature="oa{sv}")

1990

2348

1991

2349

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

1992

2350

def RemoveClient(self, object_path):

1993

2351

"D-Bus method"

1994

for c in tcp_server.clients:

2352

for c in tcp_server.clients.itervalues():

1995

2353

if c.dbus_object_path == object_path:

1996

tcp_server.clients.remove(c)

2354

del tcp_server.clients[c.name]

1997

2355

c.remove_from_connection()

1998

2356

# Don't signal anything except ClientRemoved

1999

2357

c.disable(quiet=True)

2004

2362

2005

2363

del _interface

2006

2364

2007

mandos_dbus_service = MandosDBusService()

2365

class MandosDBusServiceTransitional(MandosDBusService):

2366

__metaclass__ = AlternateDBusNamesMetaclass

2367

mandos_dbus_service = MandosDBusServiceTransitional()

2008

2368

2009

2369

def cleanup():

2010

2370

"Cleanup function; run on exit"

2011

2371

service.cleanup()

2012

2372

2373

multiprocessing.active_children()

2374

if not (tcp_server.clients or client_settings):

2375

return

2376

2377

# Store client before exiting. Secrets are encrypted with key

2378

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

2379

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

2380

clients = {}

2381

with PGPEngine() as pgp:

2382

for client in tcp_server.clients.itervalues():

2383

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

2384

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

2385

key)

2386

client_dict = {}

2387

2388

# A list of attributes that can not be pickled

2389

# + secret.

2390

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

2391

"checker"))

2392

for name, typ in (inspect.getmembers

2393

(dbus.service.Object)):

2394

exclude.add(name)

2395

2396

client_dict["encrypted_secret"] = (client

2397

.encrypted_secret)

2398

for attr in client.client_structure:

2399

if attr not in exclude:

2400

client_dict[attr] = getattr(client, attr)

2401

2402

clients[client.name] = client_dict

2403

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

2404

2405

try:

2406

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

2407

prefix="clients-",

2408

dir=os.path.dirname

2409

(stored_state_path))

2410

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

2411

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

2412

os.rename(tempname, stored_state_path)

2413

except (IOError, OSError) as e:

2414

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

2415

.format(e))

2416

if not debug:

2417

try:

2418

os.remove(tempname)

2419

except NameError:

2420

pass

2421

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

2422

errno.EEXIST)):

2423

raise e

2424

2425

# Delete all clients, and settings from config

2013

2426

while tcp_server.clients:

2014

client = tcp_server.clients.pop()

2427

name, client = tcp_server.clients.popitem()

2015

2428

if use_dbus:

2016

2429

client.remove_from_connection()

2017

client.disable_hook = None

2018

2430

# Don't signal anything except ClientRemoved

2019

2431

client.disable(quiet=True)

2020

2432

if use_dbus:

2021

2433

# Emit D-Bus signal

2022

mandos_dbus_service.ClientRemoved(client.dbus_object_path,

2434

mandos_dbus_service.ClientRemoved(client

2435

.dbus_object_path,

2023

2436

client.name)

2437

client_settings.clear()

2024

2438

2025

2439

atexit.register(cleanup)

2026

2440

2027

for client in tcp_server.clients:

2441

for client in tcp_server.clients.itervalues():

2028

2442

if use_dbus:

2029

2443

# Emit D-Bus signal

2030

2444

mandos_dbus_service.ClientAdded(client.dbus_object_path)

2031

client.enable()

2445

# Need to initiate checking of clients

2446

if client.enabled:

2447

client.init_checker()

2032

2448

2033

2449

tcp_server.enable()

2034

2450

tcp_server.server_activate()