/mandos/trunk : revision 525

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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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85

except ImportError:

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SO_BINDTODEVICE = None

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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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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(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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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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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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379

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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

426

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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432

"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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443

315

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def timeout_milliseconds(self):

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"Return the 'timeout' attribute in milliseconds"

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return self._timedelta_to_milliseconds(self.timeout)

446

return timedelta_to_milliseconds(self.timeout)

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448

def extended_timeout_milliseconds(self):

449

"Return the 'extended_timeout' attribute in milliseconds"

450

return timedelta_to_milliseconds(self.extended_timeout)

318

451

319

452

def interval_milliseconds(self):

320

453

"Return the 'interval' attribute in milliseconds"

321

return self._timedelta_to_milliseconds(self.interval)

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454

return timedelta_to_milliseconds(self.interval)

455

323

456

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):

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:

462

{ 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"]

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# 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):

327

511

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

328

512

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

329

513

attribute."""

330

514

self.name = name

331

if config is None:

332

config = {}

515

# adding all client settings

516

for setting, value in settings.iteritems():

517

setattr(self, setting, value)

518

333

519

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

334

520

# Uppercase and remove spaces from fingerprint for later

335

521

# comparison purposes with return value from the fingerprint()

336

522

# function

337

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

338

.replace(" ", ""))

339

523

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

524

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

525

526

# attributes specific for this server instance

359

527

self.checker = None

360

528

self.checker_initiator_tag = None

361

529

self.disable_initiator_tag = None

362

530

self.checker_callback_tag = None

363

self.checker_command = config["checker"]

364

531

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)

532

self.approved = None

369

533

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())

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)

375

548

549

# Send notice to process children that client state has changed

376

550

def send_changedstate(self):

377

self.changedstate.acquire()

378

self.changedstate.notify_all()

379

self.changedstate.release()

380

551

with self.changedstate:

552

self.changedstate.notify_all()

553

381

554

def enable(self):

382

555

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

383

556

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

384

557

# Already enabled

385

558

return

386

559

self.send_changedstate()

560

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

561

self.enabled = True

387

562

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()

563

self.init_checker()

400

564

401

565

def disable(self, quiet=True):

402

566

"""Disable this client."""

409

573

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

410

574

gobject.source_remove(self.disable_initiator_tag)

411

575

self.disable_initiator_tag = None

576

self.expires = None

412

577

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

413

578

gobject.source_remove(self.checker_initiator_tag)

414

579

self.checker_initiator_tag = None

415

580

self.stop_checker()

416

if self.disable_hook:

417

self.disable_hook(self)

418

581

self.enabled = False

419

582

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

420

583

return False

421

584

422

585

def __del__(self):

423

self.disable_hook = None

424

586

self.disable()

425

587

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

426

601

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

427

602

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

428

603

self.checker_callback_tag = None

429

604

self.checker = None

430

605

if os.WIFEXITED(condition):

431

exitstatus = os.WEXITSTATUS(condition)

432

if exitstatus == 0:

606

self.last_checker_status = os.WEXITSTATUS(condition)

607

if self.last_checker_status == 0:

433

608

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

434

609

vars(self))

435

610

self.checked_ok()

437

612

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

438

613

vars(self))

439

614

else:

615

self.last_checker_status = -1

440

616

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

441

617

vars(self))

442

618

443

def checked_ok(self):

619

def checked_ok(self, timeout=None):

444

620

"""Bump up the timeout for this client.

445

621

446

622

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

447

623

alive and well.

448

624

"""

625

if timeout is None:

626

timeout = self.timeout

449

627

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))

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

454

635

455

636

def need_approval(self):

456

637

self.last_approval_request = datetime.datetime.utcnow()

496

677

'replace')))

497

678

for attr in

498

679

self.runtime_expansions)

499

680

500

681

try:

501

682

command = self.checker_command % escaped_attrs

502

683

except TypeError as error:

548

729

raise

549

730

self.checker = None

550

731

732

551

733

def dbus_service_property(dbus_interface, signature="v",

552

734

access="readwrite", byte_arrays=False):

553

735

"""Decorators for marking methods of a DBusObjectWithProperties to

599

781

600

782

class DBusObjectWithProperties(dbus.service.Object):

601

783

"""A D-Bus object with properties.

602

784

603

785

Classes inheriting from this can use the dbus_service_property

604

786

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

605

787

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

612

794

def _get_all_dbus_properties(self):

613

795

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

614

796

"""

615

return ((prop._dbus_name, prop)

797

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

798

for cls in self.__class__.__mro__

616

799

for name, prop in

617

inspect.getmembers(self, self._is_dbus_property))

800

inspect.getmembers(cls, self._is_dbus_property))

618

801

619

802

def _get_dbus_property(self, interface_name, property_name):

620

803

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

621

804

property with the specified name and interface.

622

805

"""

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

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

633

813

# No such property

634

814

raise DBusPropertyNotFound(self.dbus_object_path + ":"

635

815

+ interface_name + "."

669

849

def GetAll(self, interface_name):

670

850

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

671

851

standard.

672

852

673

853

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

674

854

"""

675

all = {}

855

properties = {}

676

856

for name, prop in self._get_all_dbus_properties():

677

857

if (interface_name

678

858

and interface_name != prop._dbus_interface):

683

863

continue

684

864

value = prop()

685

865

if not hasattr(value, "variant_level"):

686

all[name] = value

866

properties[name] = value

687

867

continue

688

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

689

value.variant_level+1)

690

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

868

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

869

value.variant_level+1)

870

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

691

871

692

872

@dbus.service.method(dbus.INTROSPECTABLE_IFACE,

693

873

out_signature="s",

737

917

return xmlstring

738

918

739

919

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

740

1026

class ClientDBus(Client, DBusObjectWithProperties):

741

1027

"""A Client class using D-Bus

742

1028

751

1037

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

752

1038

753

1039

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

754

self._approvals_pending = 0

755

1040

self.bus = bus

756

1041

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

1042

self._approvals_pending = 0

1043

1044

self._approvals_pending = 0

757

1045

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

758

1046

# the D-Bus

759

1047

client_object_name = unicode(self.name).translate(

764

1052

DBusObjectWithProperties.__init__(self, self.bus,

765

1053

self.dbus_object_path)

766

1054

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

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

810

1121

811

1122

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

812

1123

try:

821

1132

*args, **kwargs):

822

1133

self.checker_callback_tag = None

823

1134

self.checker = None

824

# Emit D-Bus signal

825

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

826

dbus.Boolean(False, variant_level=1))

827

1135

if os.WIFEXITED(condition):

828

1136

exitstatus = os.WEXITSTATUS(condition)

829

1137

# Emit D-Bus signal

839

1147

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

840

1148

*args, **kwargs)

841

1149

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

1150

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

860

1151

old_checker = self.checker

861

1152

if self.checker is not None:

868

1159

and old_checker_pid != self.checker.pid):

869

1160

# Emit D-Bus signal

870

1161

self.CheckerStarted(self.current_checker_command)

871

self.PropertyChanged(

872

dbus.String("CheckerRunning"),

873

dbus.Boolean(True, variant_level=1))

874

1162

return r

875

1163

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

1164

def _reset_approved(self):

886

self._approved = None

1165

self.approved = None

887

1166

return False

888

1167

889

1168

def approve(self, value=True):

890

1169

self.send_changedstate()

891

self._approved = value

892

gobject.timeout_add(self._timedelta_to_milliseconds

1170

self.approved = value

1171

gobject.timeout_add(timedelta_to_milliseconds

893

1172

(self.approval_duration),

894

1173

self._reset_approved)

895

1174

896

1175

897

1176

## D-Bus methods, signals & properties

898

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

1177

_interface = "se.recompile.Mandos.Client"

899

1178

900

1179

## Signals

901

1180

938

1217

"D-Bus signal"

939

1218

return self.need_approval()

940

1219

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

941

1228

## Methods

942

1229

943

1230

# Approve - method

987

1274

if value is None: # get

988

1275

return dbus.Boolean(self.approved_by_default)

989

1276

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

1277

994

1278

# ApprovalDelay - property

995

1279

@dbus_service_property(_interface, signature="t",

998

1282

if value is None: # get

999

1283

return dbus.UInt64(self.approval_delay_milliseconds())

1000

1284

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

1285

1005

1286

# ApprovalDuration - property

1006

1287

@dbus_service_property(_interface, signature="t",

1007

1288

access="readwrite")

1008

1289

def ApprovalDuration_dbus_property(self, value=None):

1009

1290

if value is None: # get

1010

return dbus.UInt64(self._timedelta_to_milliseconds(

1291

return dbus.UInt64(timedelta_to_milliseconds(

1011

1292

self.approval_duration))

1012

1293

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

1294

1017

1295

# Name - property

1018

1296

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

1030

1308

def Host_dbus_property(self, value=None):

1031

1309

if value is None: # get

1032

1310

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))

1311

self.host = unicode(value)

1037

1312

1038

1313

# Created - property

1039

1314

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

1040

1315

def Created_dbus_property(self):

1041

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

1316

return datetime_to_dbus(self.created)

1042

1317

1043

1318

# LastEnabled - property

1044

1319

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

1045

1320

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))

1321

return datetime_to_dbus(self.last_enabled)

1049

1322

1050

1323

# Enabled - property

1051

1324

@dbus_service_property(_interface, signature="b",

1065

1338

if value is not None:

1066

1339

self.checked_ok()

1067

1340

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))

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)

1072

1347

1073

1348

# LastApprovalRequest - property

1074

1349

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

1075

1350

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))

1351

return datetime_to_dbus(self.last_approval_request)

1081

1352

1082

1353

# Timeout - property

1083

1354

@dbus_service_property(_interface, signature="t",

1086

1357

if value is None: # get

1087

1358

return dbus.UInt64(self.timeout_milliseconds())

1088

1359

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

1360

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

1093

1361

return

1094

1362

# Reschedule timeout

1095

1363

gobject.source_remove(self.disable_initiator_tag)

1096

1364

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()))

1365

self.expires = None

1366

time_to_die = timedelta_to_milliseconds((self

1367

.last_checked_ok

1368

+ self.timeout)

1369

- datetime.datetime

1370

.utcnow())

1103

1371

if time_to_die <= 0:

1104

1372

# The timeout has passed

1105

1373

self.disable()

1106

1374

else:

1375

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

1376

+ datetime.timedelta(milliseconds =

1377

time_to_die))

1107

1378

self.disable_initiator_tag = (gobject.timeout_add

1108

1379

(time_to_die, self.disable))

1109

1380

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

1110

1389

# Interval - property

1111

1390

@dbus_service_property(_interface, signature="t",

1112

1391

access="readwrite")

1114

1393

if value is None: # get

1115

1394

return dbus.UInt64(self.interval_milliseconds())

1116

1395

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

1396

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

1121

1397

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

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

1128

1405

# Checker - property

1129

1406

@dbus_service_property(_interface, signature="s",

1130

1407

access="readwrite")

1131

1408

def Checker_dbus_property(self, value=None):

1132

1409

if value is None: # get

1133

1410

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))

1411

self.checker_command = unicode(value)

1139

1412

1140

1413

# CheckerRunning - property

1141

1414

@dbus_service_property(_interface, signature="b",

1168

1441

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

1169

1442

if not self._pipe.recv():

1170

1443

raise KeyError()

1171

1444

1172

1445

def __getattribute__(self, name):

1173

if(name == '_pipe'):

1446

if name == '_pipe':

1174

1447

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

1175

1448

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

1176

1449

data = self._pipe.recv()

1181

1454

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

1182

1455

return self._pipe.recv()[1]

1183

1456

return func

1184

1457

1185

1458

def __setattr__(self, name, value):

1186

if(name == '_pipe'):

1459

if name == '_pipe':

1187

1460

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

1188

1461

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

1189

1462

1190

1463

1464

class ClientDBusTransitional(ClientDBus):

1465

__metaclass__ = AlternateDBusNamesMetaclass

1466

1467

1191

1468

class ClientHandler(socketserver.BaseRequestHandler, object):

1192

1469

"""A class to handle client connections.

1193

1470

1200

1477

unicode(self.client_address))

1201

1478

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

1202

1479

self.server.child_pipe.fileno())

1203

1480

1204

1481

session = (gnutls.connection

1205

1482

.ClientSession(self.request,

1206

1483

gnutls.connection

1207

1484

.X509Credentials()))

1208

1485

1209

1486

# Note: gnutls.connection.X509Credentials is really a

1210

1487

# generic GnuTLS certificate credentials object so long as

1211

1488

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

1212

1489

# here despite using OpenPGP certificates.

1213

1490

1214

1491

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

1215

1492

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

1216

1493

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

1222

1499

(gnutls.library.functions

1223

1500

.gnutls_priority_set_direct(session._c_object,

1224

1501

priority, None))

1225

1502

1226

1503

# Start communication using the Mandos protocol

1227

1504

# Get protocol number

1228

1505

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

1233

1510

except (ValueError, IndexError, RuntimeError) as error:

1234

1511

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

1235

1512

return

1236

1513

1237

1514

# Start GnuTLS connection

1238

1515

try:

1239

1516

session.handshake()

1243

1520

# established. Just abandon the request.

1244

1521

return

1245

1522

logger.debug("Handshake succeeded")

1246

1523

1247

1524

approval_required = False

1248

1525

try:

1249

1526

try:

1254

1531

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

1255

1532

return

1256

1533

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

1257

1534

1258

1535

try:

1259

1536

client = ProxyClient(child_pipe, fpr,

1260

1537

self.client_address)

1261

1538

except KeyError:

1262

1539

return

1263

1540

1541

if self.server.use_dbus:

1542

# Emit D-Bus signal

1543

client.NewRequest(str(self.client_address))

1544

1264

1545

if client.approval_delay:

1265

1546

delay = client.approval_delay

1266

1547

client.approvals_pending += 1

1272

1553

client.name)

1273

1554

if self.server.use_dbus:

1274

1555

# Emit D-Bus signal

1275

client.Rejected("Disabled")

1556

client.Rejected("Disabled")

1276

1557

return

1277

1558

1278

if client._approved or not client.approval_delay:

1559

if client.approved or not client.approval_delay:

1279

1560

#We are approved or approval is disabled

1280

1561

break

1281

elif client._approved is None:

1562

elif client.approved is None:

1282

1563

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

1283

1564

client.name)

1284

1565

if self.server.use_dbus:

1295

1576

return

1296

1577

1297

1578

#wait until timeout or approved

1298

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

1299

1579

time = datetime.datetime.now()

1300

1580

client.changedstate.acquire()

1301

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

1581

(client.changedstate.wait

1582

(float(client.timedelta_to_milliseconds(delay)

1583

/ 1000)))

1302

1584

client.changedstate.release()

1303

1585

time2 = datetime.datetime.now()

1304

1586

if (time2 - time) >= delay:

1326

1608

sent, len(client.secret)

1327

1609

- (sent_size + sent))

1328

1610

sent_size += sent

1329

1611

1330

1612

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

1331

# bump the timeout as if seen

1332

client.checked_ok()

1613

# bump the timeout using extended_timeout

1614

client.checked_ok(client.extended_timeout)

1333

1615

if self.server.use_dbus:

1334

1616

# Emit D-Bus signal

1335

1617

client.GotSecret()

1402

1684

# Convert the buffer to a Python bytestring

1403

1685

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

1404

1686

# Convert the bytestring to hexadecimal notation

1405

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

1687

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

1406

1688

return hex_fpr

1407

1689

1408

1690

1411

1693

def sub_process_main(self, request, address):

1412

1694

try:

1413

1695

self.finish_request(request, address)

1414

except:

1696

except Exception:

1415

1697

self.handle_error(request, address)

1416

1698

self.close_request(request)

1417

1699

1418

1700

def process_request(self, request, address):

1419

1701

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

1420

multiprocessing.Process(target = self.sub_process_main,

1421

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

1702

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

1703

args = (request,

1704

address))

1705

proc.start()

1706

return proc

1707

1422

1708

1423

1709

class MultiprocessingMixInWithPipe(MultiprocessingMixIn, object):

1424

1710

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

1428

1714

This function creates a new pipe in self.pipe

1429

1715

"""

1430

1716

parent_pipe, self.child_pipe = multiprocessing.Pipe()

1431

1432

super(MultiprocessingMixInWithPipe,

1433

self).process_request(request, client_address)

1717

1718

proc = MultiprocessingMixIn.process_request(self, request,

1719

client_address)

1434

1720

self.child_pipe.close()

1435

self.add_pipe(parent_pipe)

1436

1437

def add_pipe(self, parent_pipe):

1721

self.add_pipe(parent_pipe, proc)

1722

1723

def add_pipe(self, parent_pipe, proc):

1438

1724

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

1439

1725

raise NotImplementedError

1440

1726

1727

1441

1728

class IPv6_TCPServer(MultiprocessingMixInWithPipe,

1442

1729

socketserver.TCPServer, object):

1443

1730

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

1517

1804

self.enabled = False

1518

1805

self.clients = clients

1519

1806

if self.clients is None:

1520

self.clients = set()

1807

self.clients = {}

1521

1808

self.use_dbus = use_dbus

1522

1809

self.gnutls_priority = gnutls_priority

1523

1810

IPv6_TCPServer.__init__(self, server_address,

1527

1814

def server_activate(self):

1528

1815

if self.enabled:

1529

1816

return socketserver.TCPServer.server_activate(self)

1817

1530

1818

def enable(self):

1531

1819

self.enabled = True

1532

def add_pipe(self, parent_pipe):

1820

1821

def add_pipe(self, parent_pipe, proc):

1533

1822

# Call "handle_ipc" for both data and EOF events

1534

1823

gobject.io_add_watch(parent_pipe.fileno(),

1535

1824

gobject.IO_IN | gobject.IO_HUP,

1536

1825

functools.partial(self.handle_ipc,

1537

parent_pipe = parent_pipe))

1538

1826

parent_pipe =

1827

parent_pipe,

1828

proc = proc))

1829

1539

1830

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

1540

client_object=None):

1831

proc = None, client_object=None):

1541

1832

condition_names = {

1542

1833

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

1543

1834

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

1552

1843

for cond, name in

1553

1844

condition_names.iteritems()

1554

1845

if cond & condition)

1555

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

1846

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

1556

1847

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

1848

# Wait for other process to exit

1849

proc.join()

1557

1850

return False

1558

1851

1559

1852

# Read a request from the child

1564

1857

fpr = request[1]

1565

1858

address = request[2]

1566

1859

1567

for c in self.clients:

1860

for c in self.clients.itervalues():

1568

1861

if c.fingerprint == fpr:

1569

1862

client = c

1570

1863

break

1573

1866

"dress: %s", fpr, address)

1574

1867

if self.use_dbus:

1575

1868

# Emit D-Bus signal

1576

mandos_dbus_service.ClientNotFound(fpr, address[0])

1869

mandos_dbus_service.ClientNotFound(fpr,

1870

address[0])

1577

1871

parent_pipe.send(False)

1578

1872

return False

1579

1873

1580

1874

gobject.io_add_watch(parent_pipe.fileno(),

1581

1875

gobject.IO_IN | gobject.IO_HUP,

1582

1876

functools.partial(self.handle_ipc,

1583

parent_pipe = parent_pipe,

1584

client_object = client))

1877

parent_pipe =

1878

parent_pipe,

1879

proc = proc,

1880

client_object =

1881

client))

1585

1882

parent_pipe.send(True)

1586

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

1883

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

1884

# same fileno

1587

1885

return False

1588

1886

if command == 'funcall':

1589

1887

funcname = request[1]

1590

1888

args = request[2]

1591

1889

kwargs = request[3]

1592

1890

1593

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

1594

1891

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

1892

funcname)(*args,

1893

**kwargs)))

1894

1595

1895

if command == 'getattr':

1596

1896

attrname = request[1]

1597

1897

if callable(client_object.__getattribute__(attrname)):

1598

1898

parent_pipe.send(('function',))

1599

1899

else:

1600

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

1900

parent_pipe.send(('data', client_object

1901

.__getattribute__(attrname)))

1601

1902

1602

1903

if command == 'setattr':

1603

1904

attrname = request[1]

1604

1905

value = request[2]

1605

1906

setattr(client_object, attrname, value)

1606

1907

1607

1908

return True

1608

1909

1609

1910

1646

1947

return timevalue

1647

1948

1648

1949

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

1950

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

1674

1951

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

1675

1952

1730

2007

" system bus interface")

1731

2008

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

1732

2009

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

1733

2016

options = parser.parse_args()

1734

2017

1735

2018

if options.check:

1748

2031

"use_dbus": "True",

1749

2032

"use_ipv6": "True",

1750

2033

"debuglevel": "",

2034

"restore": "True",

2035

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

1751

2036

}

1752

2037

1753

2038

# Parse config file for server-global settings

1770

2055

# options, if set.

1771

2056

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

1772

2057

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

1773

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

2058

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

2059

"statedir"):

1774

2060

value = getattr(options, option)

1775

2061

if value is not None:

1776

2062

server_settings[option] = value

1788

2074

debuglevel = server_settings["debuglevel"]

1789

2075

use_dbus = server_settings["use_dbus"]

1790

2076

use_ipv6 = server_settings["use_ipv6"]

1791

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

1792

2089

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

1793

2090

syslogger.setFormatter(logging.Formatter

1794

2091

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

1796

2093

% server_settings["servicename"]))

1797

2094

1798

2095

# 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)

2096

client_config = configparser.SafeConfigParser(Client.client_defaults)

1807

2097

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

1808

2098

"clients.conf"))

1809

2099

1847

2137

if error[0] != errno.EPERM:

1848

2138

raise error

1849

2139

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

2140

if debug:

1859

2141

# Enable all possible GnuTLS debugging

1860

2142

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

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

1922

2263

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()))

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

1932

2287

if not tcp_server.clients:

1933

2288

logger.warning("No clients defined")

1934

2289

1945

2300

# "pidfile" was never created

1946

2301

pass

1947

2302

del pidfilename

1948

1949

2303

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

1950

2304

1951

2305

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

1952

2306

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

1953

2307

1956

2310

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

1957

2311

def __init__(self):

1958

2312

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

1959

_interface = "se.bsnet.fukt.Mandos"

2313

_interface = "se.recompile.Mandos"

1960

2314

1961

2315

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

1962

2316

def ClientAdded(self, objpath):

1977

2331

def GetAllClients(self):

1978

2332

"D-Bus method"

1979

2333

return dbus.Array(c.dbus_object_path

1980

for c in tcp_server.clients)

2334

for c in

2335

tcp_server.clients.itervalues())

1981

2336

1982

2337

@dbus.service.method(_interface,

1983

2338

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

1985

2340

"D-Bus method"

1986

2341

return dbus.Dictionary(

1987

2342

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

1988

for c in tcp_server.clients),

2343

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

1989

2344

signature="oa{sv}")

1990

2345

1991

2346

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

1992

2347

def RemoveClient(self, object_path):

1993

2348

"D-Bus method"

1994

for c in tcp_server.clients:

2349

for c in tcp_server.clients.itervalues():

1995

2350

if c.dbus_object_path == object_path:

1996

tcp_server.clients.remove(c)

2351

del tcp_server.clients[c.name]

1997

2352

c.remove_from_connection()

1998

2353

# Don't signal anything except ClientRemoved

1999

2354

c.disable(quiet=True)

2004

2359

2005

2360

del _interface

2006

2361

2007

mandos_dbus_service = MandosDBusService()

2362

class MandosDBusServiceTransitional(MandosDBusService):

2363

__metaclass__ = AlternateDBusNamesMetaclass

2364

mandos_dbus_service = MandosDBusServiceTransitional()

2008

2365

2009

2366

def cleanup():

2010

2367

"Cleanup function; run on exit"

2011

2368

service.cleanup()

2012

2369

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

2013

2414

while tcp_server.clients:

2014

client = tcp_server.clients.pop()

2415

name, client = tcp_server.clients.popitem()

2015

2416

if use_dbus:

2016

2417

client.remove_from_connection()

2017

client.disable_hook = None

2018

2418

# Don't signal anything except ClientRemoved

2019

2419

client.disable(quiet=True)

2020

2420

if use_dbus:

2021

2421

# Emit D-Bus signal

2022

mandos_dbus_service.ClientRemoved(client.dbus_object_path,

2422

mandos_dbus_service.ClientRemoved(client

2423

.dbus_object_path,

2023

2424

client.name)

2425

client_settings.clear()

2024

2426

2025

2427

atexit.register(cleanup)

2026

2428

2027

for client in tcp_server.clients:

2429

for client in tcp_server.clients.itervalues():

2028

2430

if use_dbus:

2029

2431

# Emit D-Bus signal

2030

2432

mandos_dbus_service.ClientAdded(client.dbus_object_path)

2031

client.enable()

2433

# Need to initiate checking of clients

2434

if client.enabled:

2435

client.init_checker()

2032

2436

2033

2437

tcp_server.enable()

2034

2438

tcp_server.server_activate()