/mandos/trunk : revision 493

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# along with this program. If not, see

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

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#

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

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

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#

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from __future__ import (division, absolute_import, print_function,

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import functools

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import cPickle as pickle

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import multiprocessing

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import types

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import binascii

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import tempfile

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import dbus

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import dbus.service

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import ctypes.util

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import xml.dom.minidom

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import inspect

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import GnuPGInterface

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try:

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SO_BINDTODEVICE = socket.SO_BINDTODEVICE

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except ImportError:

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SO_BINDTODEVICE = None

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version = "1.4.1"

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stored_state_file = "clients.pickle"

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logger = logging.getLogger()

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version = "1.3.1"

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#logger = logging.getLogger('mandos')

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logger = logging.Logger('mandos')

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syslogger = (logging.handlers.SysLogHandler

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(facility = logging.handlers.SysLogHandler.LOG_DAEMON,

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

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try:

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if_nametoindex = (ctypes.cdll.LoadLibrary

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

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.if_nametoindex)

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except (OSError, AttributeError):

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def if_nametoindex(interface):

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

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

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

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ifreq = fcntl.ioctl(s, SIOCGIFINDEX,

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

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interface))

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

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ifreq[16:20])[0]

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return interface_index

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def initlogger(debug, level=logging.WARNING):

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"""init logger and add loglevel"""

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syslogger.setFormatter(logging.Formatter

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

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' %(message)s'))

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logger.addHandler(syslogger)

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if debug:

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console = logging.StreamHandler()

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

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' [%(process)d]:'

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' %(levelname)s:'

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' %(message)s'))

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logger.addHandler(console)

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logger.setLevel(level)

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class PGPError(Exception):

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

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pass

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class PGPEngine(object):

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"""A simple class for OpenPGP symmetric encryption & decryption"""

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def __init__(self):

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self.gnupg = GnuPGInterface.GnuPG()

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self.tempdir = tempfile.mkdtemp(prefix="mandos-")

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self.gnupg = GnuPGInterface.GnuPG()

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self.gnupg.options.meta_interactive = False

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self.gnupg.options.homedir = self.tempdir

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self.gnupg.options.extra_args.extend(['--force-mdc',

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'--quiet'])

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def __enter__(self):

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return self

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

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self._cleanup()

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return False

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def __del__(self):

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self._cleanup()

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def _cleanup(self):

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if self.tempdir is not None:

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# Delete contents of tempdir

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

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topdown = False):

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for filename in files:

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

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for dirname in dirs:

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

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# Remove tempdir

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os.rmdir(self.tempdir)

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self.tempdir = None

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def password_encode(self, password):

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# Passphrase can not be empty and can not contain newlines or

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# NUL bytes. So we prefix it and hex encode it.

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return b"mandos" + binascii.hexlify(password)

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def encrypt(self, data, password):

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self.gnupg.passphrase = self.password_encode(password)

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with open(os.devnull) as devnull:

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try:

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proc = self.gnupg.run(['--symmetric'],

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create_fhs=['stdin', 'stdout'],

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attach_fhs={'stderr': devnull})

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with contextlib.closing(proc.handles['stdin']) as f:

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f.write(data)

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with contextlib.closing(proc.handles['stdout']) as f:

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ciphertext = f.read()

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proc.wait()

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except IOError as e:

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raise PGPError(e)

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self.gnupg.passphrase = None

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return ciphertext

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def decrypt(self, data, password):

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self.gnupg.passphrase = self.password_encode(password)

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with open(os.devnull) as devnull:

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try:

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proc = self.gnupg.run(['--decrypt'],

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create_fhs=['stdin', 'stdout'],

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attach_fhs={'stderr': devnull})

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with contextlib.closing(proc.handles['stdin'] ) as f:

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f.write(data)

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with contextlib.closing(proc.handles['stdout']) as f:

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decrypted_plaintext = f.read()

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proc.wait()

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except IOError as e:

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raise PGPError(e)

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self.gnupg.passphrase = None

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return decrypted_plaintext

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syslogger.setFormatter(logging.Formatter

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

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' %(message)s'))

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logger.addHandler(syslogger)

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console = logging.StreamHandler()

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

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' %(levelname)s:'

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' %(message)s'))

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logger.addHandler(console)

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class AvahiError(Exception):

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

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" after %i retries, exiting.",

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self.rename_count)

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raise AvahiServiceError("Too many renames")

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self.name = unicode(self.server

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.GetAlternativeServiceName(self.name))

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self.name = unicode(self.server.GetAlternativeServiceName(self.name))

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

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self.name)

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syslogger.setFormatter(logging.Formatter

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

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

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% self.name))

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self.remove()

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try:

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self.add()

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avahi.DBUS_INTERFACE_ENTRY_GROUP)

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self.entry_group_state_changed_match = (

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self.group.connect_to_signal(

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'StateChanged', self.entry_group_state_changed))

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'StateChanged', self .entry_group_state_changed))

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

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self.name, self.type)

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self.group.AddService(

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try:

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self.group.Free()

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except (dbus.exceptions.UnknownMethodException,

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dbus.exceptions.DBusException):

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dbus.exceptions.DBusException) as e:

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pass

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self.group = None

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self.remove()

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self.server_state_changed)

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

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class AvahiServiceToSyslog(AvahiService):

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def rename(self):

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

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ret = AvahiService.rename(self)

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syslogger.setFormatter(logging.Formatter

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

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

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% self.name))

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return ret

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def timedelta_to_milliseconds(td):

382

"Convert a datetime.timedelta() to milliseconds"

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return ((td.days * 24 * 60 * 60 * 1000)

384

+ (td.seconds * 1000)

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+ (td.microseconds // 1000))

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387

267

class Client(object):

388

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

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390

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Attributes:

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

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

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

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

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

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

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checker_initiator_tag: a gobject event source tag, or None

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

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client_structure: Object describing what attributes a client has

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and is used for storing the client at exit

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current_checker_command: string; current running checker_command

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

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disable_initiator_tag: a gobject event source tag, or None

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enabled: bool()

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

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

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

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

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last_checker_status: integer between 0 and 255 reflecting exit

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status of last checker. -1 reflects crashed

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checker, or None.

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

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last_enabled: datetime.datetime(); (UTC)

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

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D-Bus identifiers

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

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

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until this client is disabled

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extended_timeout: extra long timeout when password has been sent

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runtime_expansions: Allowed attributes for runtime expansion.

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expires: datetime.datetime(); time (UTC) when a client will be

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disabled, or None

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"""

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runtime_expansions = ("approval_delay", "approval_duration",

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

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"host", "interval", "last_checked_ok",

433

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

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

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"extended_timeout": "15m",

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"interval": "2m",

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

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"host": "",

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"approval_delay": "0s",

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"approval_duration": "1s",

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"approved_by_default": "True",

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"enabled": "True",

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}

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@staticmethod

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def _timedelta_to_milliseconds(td):

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"Convert a datetime.timedelta() to milliseconds"

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return ((td.days * 24 * 60 * 60 * 1000)

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+ (td.seconds * 1000)

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+ (td.microseconds // 1000))

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314

445

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def timeout_milliseconds(self):

446

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"Return the 'timeout' attribute in milliseconds"

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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)

317

return self._timedelta_to_milliseconds(self.timeout)

452

318

453

319

def interval_milliseconds(self):

454

320

"Return the 'interval' attribute in milliseconds"

455

return timedelta_to_milliseconds(self.interval)

456

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return self._timedelta_to_milliseconds(self.interval)

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457

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def approval_delay_milliseconds(self):

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

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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):

324

return self._timedelta_to_milliseconds(self.approval_delay)

325

326

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

512

327

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

513

328

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

514

329

attribute."""

515

330

self.name = name

516

# adding all client settings

517

for setting, value in settings.iteritems():

518

setattr(self, setting, value)

519

331

if config is None:

332

config = {}

520

333

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

521

334

# Uppercase and remove spaces from fingerprint for later

522

335

# comparison purposes with return value from the fingerprint()

523

336

# function

337

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

338

.replace(" ", ""))

524

339

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

525

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

526

527

# attributes specific for this server instance

340

if "secret" in config:

341

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

342

elif "secfile" in config:

343

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

344

(config["secfile"])),

345

"rb") as secfile:

346

self.secret = secfile.read()

347

else:

348

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

349

% self.name)

350

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

351

self.created = datetime.datetime.utcnow()

352

self.enabled = False

353

self.last_approval_request = None

354

self.last_enabled = None

355

self.last_checked_ok = None

356

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

357

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

358

self.disable_hook = disable_hook

528

359

self.checker = None

529

360

self.checker_initiator_tag = None

530

361

self.disable_initiator_tag = None

531

362

self.checker_callback_tag = None

363

self.checker_command = config["checker"]

532

364

self.current_checker_command = None

533

self.approved = None

365

self.last_connect = None

366

self._approved = None

367

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

368

True)

534

369

self.approvals_pending = 0

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)

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())

549

375

550

# Send notice to process children that client state has changed

551

376

def send_changedstate(self):

552

with self.changedstate:

553

self.changedstate.notify_all()

554

377

self.changedstate.acquire()

378

self.changedstate.notify_all()

379

self.changedstate.release()

380

555

381

def enable(self):

556

382

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

557

383

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

558

384

# Already enabled

559

385

return

560

386

self.send_changedstate()

561

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

562

self.enabled = True

563

387

self.last_enabled = datetime.datetime.utcnow()

564

self.init_checker()

388

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

389

# and every interval from then on.

390

self.checker_initiator_tag = (gobject.timeout_add

391

(self.interval_milliseconds(),

392

self.start_checker))

393

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

394

self.disable_initiator_tag = (gobject.timeout_add

395

(self.timeout_milliseconds(),

396

self.disable))

397

self.enabled = True

398

# Also start a new checker *right now*.

399

self.start_checker()

565

400

566

401

def disable(self, quiet=True):

567

402

"""Disable this client."""

574

409

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

575

410

gobject.source_remove(self.disable_initiator_tag)

576

411

self.disable_initiator_tag = None

577

self.expires = None

578

412

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

579

413

gobject.source_remove(self.checker_initiator_tag)

580

414

self.checker_initiator_tag = None

581

415

self.stop_checker()

416

if self.disable_hook:

417

self.disable_hook(self)

582

418

self.enabled = False

583

419

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

584

420

return False

585

421

586

422

def __del__(self):

423

self.disable_hook = None

587

424

self.disable()

588

425

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

602

426

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

603

427

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

604

428

self.checker_callback_tag = None

605

429

self.checker = None

606

430

if os.WIFEXITED(condition):

607

self.last_checker_status = os.WEXITSTATUS(condition)

608

if self.last_checker_status == 0:

431

exitstatus = os.WEXITSTATUS(condition)

432

if exitstatus == 0:

609

433

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

610

434

vars(self))

611

435

self.checked_ok()

613

437

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

614

438

vars(self))

615

439

else:

616

self.last_checker_status = -1

617

440

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

618

441

vars(self))

619

442

620

def checked_ok(self, timeout=None):

443

def checked_ok(self):

621

444

"""Bump up the timeout for this client.

622

445

623

446

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

624

447

alive and well.

625

448

"""

626

if timeout is None:

627

timeout = self.timeout

628

449

self.last_checked_ok = datetime.datetime.utcnow()

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

450

gobject.source_remove(self.disable_initiator_tag)

451

self.disable_initiator_tag = (gobject.timeout_add

452

(self.timeout_milliseconds(),

453

self.disable))

636

454

637

455

def need_approval(self):

638

456

self.last_approval_request = datetime.datetime.utcnow()

678

496

'replace')))

679

497

for attr in

680

498

self.runtime_expansions)

681

499

682

500

try:

683

501

command = self.checker_command % escaped_attrs

684

502

except TypeError as error:

730

548

raise

731

549

self.checker = None

732

550

733

734

551

def dbus_service_property(dbus_interface, signature="v",

735

552

access="readwrite", byte_arrays=False):

736

553

"""Decorators for marking methods of a DBusObjectWithProperties to

782

599

783

600

class DBusObjectWithProperties(dbus.service.Object):

784

601

"""A D-Bus object with properties.

785

602

786

603

Classes inheriting from this can use the dbus_service_property

787

604

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

788

605

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

795

612

def _get_all_dbus_properties(self):

796

613

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

797

614

"""

798

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

799

for cls in self.__class__.__mro__

615

return ((prop._dbus_name, prop)

800

616

for name, prop in

801

inspect.getmembers(cls, self._is_dbus_property))

617

inspect.getmembers(self, self._is_dbus_property))

802

618

803

619

def _get_dbus_property(self, interface_name, property_name):

804

620

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

805

621

property with the specified name and interface.

806

622

"""

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

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

814

633

# No such property

815

634

raise DBusPropertyNotFound(self.dbus_object_path + ":"

816

635

+ interface_name + "."

850

669

def GetAll(self, interface_name):

851

670

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

852

671

standard.

853

672

854

673

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

855

674

"""

856

properties = {}

675

all = {}

857

676

for name, prop in self._get_all_dbus_properties():

858

677

if (interface_name

859

678

and interface_name != prop._dbus_interface):

864

683

continue

865

684

value = prop()

866

685

if not hasattr(value, "variant_level"):

867

properties[name] = value

686

all[name] = value

868

687

continue

869

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

870

value.variant_level+1)

871

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

688

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

689

value.variant_level+1)

690

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

872

691

873

692

@dbus.service.method(dbus.INTROSPECTABLE_IFACE,

874

693

out_signature="s",

918

737

return xmlstring

919

738

920

739

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

1027

740

class ClientDBus(Client, DBusObjectWithProperties):

1028

741

"""A Client class using D-Bus

1029

742

1038

751

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

1039

752

1040

753

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

754

self._approvals_pending = 0

1041

755

self.bus = bus

1042

756

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

1043

self._approvals_pending = 0

1044

1045

self._approvals_pending = 0

1046

757

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

1047

758

# the D-Bus

1048

759

client_object_name = unicode(self.name).translate(

1053

764

DBusObjectWithProperties.__init__(self, self.bus,

1054

765

self.dbus_object_path)

1055

766

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

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

1122

810

1123

811

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

1124

812

try:

1133

821

*args, **kwargs):

1134

822

self.checker_callback_tag = None

1135

823

self.checker = None

824

# Emit D-Bus signal

825

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

826

dbus.Boolean(False, variant_level=1))

1136

827

if os.WIFEXITED(condition):

1137

828

exitstatus = os.WEXITSTATUS(condition)

1138

829

# Emit D-Bus signal

1148

839

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

1149

840

*args, **kwargs)

1150

841

842

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

843

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

844

# Emit D-Bus signal

845

self.PropertyChanged(

846

dbus.String("LastCheckedOK"),

847

(self._datetime_to_dbus(self.last_checked_ok,

848

variant_level=1)))

849

850

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

851

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

852

# Emit D-Bus signal

853

self.PropertyChanged(

854

dbus.String("LastApprovalRequest"),

855

(self._datetime_to_dbus(self.last_approval_request,

856

variant_level=1)))

857

return r

858

1151

859

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

1152

860

old_checker = self.checker

1153

861

if self.checker is not None:

1160

868

and old_checker_pid != self.checker.pid):

1161

869

# Emit D-Bus signal

1162

870

self.CheckerStarted(self.current_checker_command)

871

self.PropertyChanged(

872

dbus.String("CheckerRunning"),

873

dbus.Boolean(True, variant_level=1))

1163

874

return r

1164

875

876

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

877

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

878

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

879

if (old_checker is not None

880

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

881

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

882

dbus.Boolean(False, variant_level=1))

883

return r

884

1165

885

def _reset_approved(self):

1166

self.approved = None

886

self._approved = None

1167

887

return False

1168

888

1169

889

def approve(self, value=True):

1170

890

self.send_changedstate()

1171

self.approved = value

1172

gobject.timeout_add(timedelta_to_milliseconds

891

self._approved = value

892

gobject.timeout_add(self._timedelta_to_milliseconds

1173

893

(self.approval_duration),

1174

894

self._reset_approved)

1175

895

1176

896

1177

897

## D-Bus methods, signals & properties

1178

_interface = "se.recompile.Mandos.Client"

898

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

1179

899

1180

900

## Signals

1181

901

1218

938

"D-Bus signal"

1219

939

return self.need_approval()

1220

940

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

1229

941

## Methods

1230

942

1231

943

# Approve - method

1275

987

if value is None: # get

1276

988

return dbus.Boolean(self.approved_by_default)

1277

989

self.approved_by_default = bool(value)

990

# Emit D-Bus signal

991

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

992

dbus.Boolean(value, variant_level=1))

1278

993

1279

994

# ApprovalDelay - property

1280

995

@dbus_service_property(_interface, signature="t",

1283

998

if value is None: # get

1284

999

return dbus.UInt64(self.approval_delay_milliseconds())

1285

1000

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

1001

# Emit D-Bus signal

1002

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

1003

dbus.UInt64(value, variant_level=1))

1286

1004

1287

1005

# ApprovalDuration - property

1288

1006

@dbus_service_property(_interface, signature="t",

1289

1007

access="readwrite")

1290

1008

def ApprovalDuration_dbus_property(self, value=None):

1291

1009

if value is None: # get

1292

return dbus.UInt64(timedelta_to_milliseconds(

1010

return dbus.UInt64(self._timedelta_to_milliseconds(

1293

1011

self.approval_duration))

1294

1012

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

1013

# Emit D-Bus signal

1014

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

1015

dbus.UInt64(value, variant_level=1))

1295

1016

1296

1017

# Name - property

1297

1018

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

1309

1030

def Host_dbus_property(self, value=None):

1310

1031

if value is None: # get

1311

1032

return dbus.String(self.host)

1312

self.host = unicode(value)

1033

self.host = value

1034

# Emit D-Bus signal

1035

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

1036

dbus.String(value, variant_level=1))

1313

1037

1314

1038

# Created - property

1315

1039

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

1316

1040

def Created_dbus_property(self):

1317

return datetime_to_dbus(self.created)

1041

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

1318

1042

1319

1043

# LastEnabled - property

1320

1044

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

1321

1045

def LastEnabled_dbus_property(self):

1322

return datetime_to_dbus(self.last_enabled)

1046

if self.last_enabled is None:

1047

return dbus.String("")

1048

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

1323

1049

1324

1050

# Enabled - property

1325

1051

@dbus_service_property(_interface, signature="b",

1339

1065

if value is not None:

1340

1066

self.checked_ok()

1341

1067

return

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)

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))

1348

1072

1349

1073

# LastApprovalRequest - property

1350

1074

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

1351

1075

def LastApprovalRequest_dbus_property(self):

1352

return datetime_to_dbus(self.last_approval_request)

1076

if self.last_approval_request is None:

1077

return dbus.String("")

1078

return dbus.String(self.

1079

_datetime_to_dbus(self

1080

.last_approval_request))

1353

1081

1354

1082

# Timeout - property

1355

1083

@dbus_service_property(_interface, signature="t",

1358

1086

if value is None: # get

1359

1087

return dbus.UInt64(self.timeout_milliseconds())

1360

1088

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

1089

# Emit D-Bus signal

1090

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

1091

dbus.UInt64(value, variant_level=1))

1361

1092

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

1362

1093

return

1363

1094

# Reschedule timeout

1364

1095

gobject.source_remove(self.disable_initiator_tag)

1365

1096

self.disable_initiator_tag = None

1366

self.expires = None

1367

time_to_die = timedelta_to_milliseconds((self

1368

.last_checked_ok

1369

+ self.timeout)

1370

- datetime.datetime

1371

.utcnow())

1097

time_to_die = (self.

1098

_timedelta_to_milliseconds((self

1099

.last_checked_ok

1100

+ self.timeout)

1101

- datetime.datetime

1102

.utcnow()))

1372

1103

if time_to_die <= 0:

1373

1104

# The timeout has passed

1374

1105

self.disable()

1375

1106

else:

1376

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

1377

+ datetime.timedelta(milliseconds =

1378

time_to_die))

1379

1107

self.disable_initiator_tag = (gobject.timeout_add

1380

1108

(time_to_die, self.disable))

1381

1109

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

1390

1110

# Interval - property

1391

1111

@dbus_service_property(_interface, signature="t",

1392

1112

access="readwrite")

1394

1114

if value is None: # get

1395

1115

return dbus.UInt64(self.interval_milliseconds())

1396

1116

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

1117

# Emit D-Bus signal

1118

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

1119

dbus.UInt64(value, variant_level=1))

1397

1120

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

1398

1121

return

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

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

1406

1128

# Checker - property

1407

1129

@dbus_service_property(_interface, signature="s",

1408

1130

access="readwrite")

1409

1131

def Checker_dbus_property(self, value=None):

1410

1132

if value is None: # get

1411

1133

return dbus.String(self.checker_command)

1412

self.checker_command = unicode(value)

1134

self.checker_command = value

1135

# Emit D-Bus signal

1136

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

1137

dbus.String(self.checker_command,

1138

variant_level=1))

1413

1139

1414

1140

# CheckerRunning - property

1415

1141

@dbus_service_property(_interface, signature="b",

1442

1168

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

1443

1169

if not self._pipe.recv():

1444

1170

raise KeyError()

1445

1171

1446

1172

def __getattribute__(self, name):

1447

if name == '_pipe':

1173

if(name == '_pipe'):

1448

1174

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

1449

1175

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

1450

1176

data = self._pipe.recv()

1455

1181

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

1456

1182

return self._pipe.recv()[1]

1457

1183

return func

1458

1184

1459

1185

def __setattr__(self, name, value):

1460

if name == '_pipe':

1186

if(name == '_pipe'):

1461

1187

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

1462

1188

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

1463

1189

1464

1190

1465

class ClientDBusTransitional(ClientDBus):

1466

__metaclass__ = AlternateDBusNamesMetaclass

1467

1468

1469

1191

class ClientHandler(socketserver.BaseRequestHandler, object):

1470

1192

"""A class to handle client connections.

1471

1193

1478

1200

unicode(self.client_address))

1479

1201

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

1480

1202

self.server.child_pipe.fileno())

1481

1203

1482

1204

session = (gnutls.connection

1483

1205

.ClientSession(self.request,

1484

1206

gnutls.connection

1485

1207

.X509Credentials()))

1486

1208

1487

1209

# Note: gnutls.connection.X509Credentials is really a

1488

1210

# generic GnuTLS certificate credentials object so long as

1489

1211

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

1490

1212

# here despite using OpenPGP certificates.

1491

1213

1492

1214

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

1493

1215

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

1494

1216

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

1500

1222

(gnutls.library.functions

1501

1223

.gnutls_priority_set_direct(session._c_object,

1502

1224

priority, None))

1503

1225

1504

1226

# Start communication using the Mandos protocol

1505

1227

# Get protocol number

1506

1228

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

1511

1233

except (ValueError, IndexError, RuntimeError) as error:

1512

1234

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

1513

1235

return

1514

1236

1515

1237

# Start GnuTLS connection

1516

1238

try:

1517

1239

session.handshake()

1521

1243

# established. Just abandon the request.

1522

1244

return

1523

1245

logger.debug("Handshake succeeded")

1524

1246

1525

1247

approval_required = False

1526

1248

try:

1527

1249

try:

1532

1254

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

1533

1255

return

1534

1256

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

1535

1257

1536

1258

try:

1537

1259

client = ProxyClient(child_pipe, fpr,

1538

1260

self.client_address)

1539

1261

except KeyError:

1540

1262

return

1541

1263

1542

if self.server.use_dbus:

1543

# Emit D-Bus signal

1544

client.NewRequest(str(self.client_address))

1545

1546

1264

if client.approval_delay:

1547

1265

delay = client.approval_delay

1548

1266

client.approvals_pending += 1

1554

1272

client.name)

1555

1273

if self.server.use_dbus:

1556

1274

# Emit D-Bus signal

1557

client.Rejected("Disabled")

1275

client.Rejected("Disabled")

1558

1276

return

1559

1277

1560

if client.approved or not client.approval_delay:

1278

if client._approved or not client.approval_delay:

1561

1279

#We are approved or approval is disabled

1562

1280

break

1563

elif client.approved is None:

1281

elif client._approved is None:

1564

1282

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

1565

1283

client.name)

1566

1284

if self.server.use_dbus:

1577

1295

return

1578

1296

1579

1297

#wait until timeout or approved

1298

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

1580

1299

time = datetime.datetime.now()

1581

1300

client.changedstate.acquire()

1582

(client.changedstate.wait

1583

(float(client.timedelta_to_milliseconds(delay)

1584

/ 1000)))

1301

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

1585

1302

client.changedstate.release()

1586

1303

time2 = datetime.datetime.now()

1587

1304

if (time2 - time) >= delay:

1609

1326

sent, len(client.secret)

1610

1327

- (sent_size + sent))

1611

1328

sent_size += sent

1612

1329

1613

1330

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

1614

# bump the timeout using extended_timeout

1615

client.checked_ok(client.extended_timeout)

1331

# bump the timeout as if seen

1332

client.checked_ok()

1616

1333

if self.server.use_dbus:

1617

1334

# Emit D-Bus signal

1618

1335

client.GotSecret()

1685

1402

# Convert the buffer to a Python bytestring

1686

1403

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

1687

1404

# Convert the bytestring to hexadecimal notation

1688

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

1405

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

1689

1406

return hex_fpr

1690

1407

1691

1408

1694

1411

def sub_process_main(self, request, address):

1695

1412

try:

1696

1413

self.finish_request(request, address)

1697

except Exception:

1414

except:

1698

1415

self.handle_error(request, address)

1699

1416

self.close_request(request)

1700

1417

1701

1418

def process_request(self, request, address):

1702

1419

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

1703

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

1704

args = (request,

1705

address))

1706

proc.start()

1707

return proc

1708

1420

multiprocessing.Process(target = self.sub_process_main,

1421

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

1709

1422

1710

1423

class MultiprocessingMixInWithPipe(MultiprocessingMixIn, object):

1711

1424

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

1715

1428

This function creates a new pipe in self.pipe

1716

1429

"""

1717

1430

parent_pipe, self.child_pipe = multiprocessing.Pipe()

1718

1719

proc = MultiprocessingMixIn.process_request(self, request,

1720

client_address)

1431

1432

super(MultiprocessingMixInWithPipe,

1433

self).process_request(request, client_address)

1721

1434

self.child_pipe.close()

1722

self.add_pipe(parent_pipe, proc)

1723

1724

def add_pipe(self, parent_pipe, proc):

1435

self.add_pipe(parent_pipe)

1436

1437

def add_pipe(self, parent_pipe):

1725

1438

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

1726

1439

raise NotImplementedError

1727

1440

1728

1729

1441

class IPv6_TCPServer(MultiprocessingMixInWithPipe,

1730

1442

socketserver.TCPServer, object):

1731

1443

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

1805

1517

self.enabled = False

1806

1518

self.clients = clients

1807

1519

if self.clients is None:

1808

self.clients = {}

1520

self.clients = set()

1809

1521

self.use_dbus = use_dbus

1810

1522

self.gnutls_priority = gnutls_priority

1811

1523

IPv6_TCPServer.__init__(self, server_address,

1815

1527

def server_activate(self):

1816

1528

if self.enabled:

1817

1529

return socketserver.TCPServer.server_activate(self)

1818

1819

1530

def enable(self):

1820

1531

self.enabled = True

1821

1822

def add_pipe(self, parent_pipe, proc):

1532

def add_pipe(self, parent_pipe):

1823

1533

# Call "handle_ipc" for both data and EOF events

1824

1534

gobject.io_add_watch(parent_pipe.fileno(),

1825

1535

gobject.IO_IN | gobject.IO_HUP,

1826

1536

functools.partial(self.handle_ipc,

1827

parent_pipe =

1828

parent_pipe,

1829

proc = proc))

1830

1537

parent_pipe = parent_pipe))

1538

1831

1539

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

1832

proc = None, client_object=None):

1540

client_object=None):

1833

1541

condition_names = {

1834

1542

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

1835

1543

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

1844

1552

for cond, name in

1845

1553

condition_names.iteritems()

1846

1554

if cond & condition)

1847

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

1555

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

1848

1556

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

1849

# Wait for other process to exit

1850

proc.join()

1851

1557

return False

1852

1558

1853

1559

# Read a request from the child

1858

1564

fpr = request[1]

1859

1565

address = request[2]

1860

1566

1861

for c in self.clients.itervalues():

1567

for c in self.clients:

1862

1568

if c.fingerprint == fpr:

1863

1569

client = c

1864

1570

break

1867

1573

"dress: %s", fpr, address)

1868

1574

if self.use_dbus:

1869

1575

# Emit D-Bus signal

1870

mandos_dbus_service.ClientNotFound(fpr,

1871

address[0])

1576

mandos_dbus_service.ClientNotFound(fpr, address[0])

1872

1577

parent_pipe.send(False)

1873

1578

return False

1874

1579

1875

1580

gobject.io_add_watch(parent_pipe.fileno(),

1876

1581

gobject.IO_IN | gobject.IO_HUP,

1877

1582

functools.partial(self.handle_ipc,

1878

parent_pipe =

1879

parent_pipe,

1880

proc = proc,

1881

client_object =

1882

client))

1583

parent_pipe = parent_pipe,

1584

client_object = client))

1883

1585

parent_pipe.send(True)

1884

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

1885

# same fileno

1586

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

1886

1587

return False

1887

1588

if command == 'funcall':

1888

1589

funcname = request[1]

1889

1590

args = request[2]

1890

1591

kwargs = request[3]

1891

1592

1892

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

1893

funcname)(*args,

1894

**kwargs)))

1895

1593

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

1594

1896

1595

if command == 'getattr':

1897

1596

attrname = request[1]

1898

1597

if callable(client_object.__getattribute__(attrname)):

1899

1598

parent_pipe.send(('function',))

1900

1599

else:

1901

parent_pipe.send(('data', client_object

1902

.__getattribute__(attrname)))

1600

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

1903

1601

1904

1602

if command == 'setattr':

1905

1603

attrname = request[1]

1906

1604

value = request[2]

1907

1605

setattr(client_object, attrname, value)

1908

1606

1909

1607

return True

1910

1608

1911

1609

1948

1646

return timevalue

1949

1647

1950

1648

1649

def if_nametoindex(interface):

1650

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

1651

1652

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

1653

global if_nametoindex

1654

try:

1655

if_nametoindex = (ctypes.cdll.LoadLibrary

1656

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

1657

.if_nametoindex)

1658

except (OSError, AttributeError):

1659

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

1660

def if_nametoindex(interface):

1661

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

1662

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

1663

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

1664

ifreq = fcntl.ioctl(s, SIOCGIFINDEX,

1665

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

1666

interface))

1667

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

1668

ifreq[16:20])[0]

1669

return interface_index

1670

return if_nametoindex(interface)

1671

1672

1951

1673

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

1952

1674

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

1953

1675

2008

1730

" system bus interface")

2009

1731

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

2010

1732

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

2017

1733

options = parser.parse_args()

2018

1734

2019

1735

if options.check:

2032

1748

"use_dbus": "True",

2033

1749

"use_ipv6": "True",

2034

1750

"debuglevel": "",

2035

"restore": "True",

2036

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

2037

1751

}

2038

1752

2039

1753

# Parse config file for server-global settings

2056

1770

# options, if set.

2057

1771

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

2058

1772

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

2059

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

2060

"statedir"):

1773

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

2061

1774

value = getattr(options, option)

2062

1775

if value is not None:

2063

1776

server_settings[option] = value

2075

1788

debuglevel = server_settings["debuglevel"]

2076

1789

use_dbus = server_settings["use_dbus"]

2077

1790

use_ipv6 = server_settings["use_ipv6"]

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

1791

2090

1792

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

2091

1793

syslogger.setFormatter(logging.Formatter

2092

1794

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

2094

1796

% server_settings["servicename"]))

2095

1797

2096

1798

# Parse config file with clients

2097

client_config = configparser.SafeConfigParser(Client.client_defaults)

1799

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

1800

"interval": "5m",

1801

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

1802

"host": "",

1803

"approval_delay": "0s",

1804

"approval_duration": "1s",

1805

}

1806

client_config = configparser.SafeConfigParser(client_defaults)

2098

1807

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

2099

1808

"clients.conf"))

2100

1809

2138

1847

if error[0] != errno.EPERM:

2139

1848

raise error

2140

1849

1850

if not debug and not debuglevel:

1851

syslogger.setLevel(logging.WARNING)

1852

console.setLevel(logging.WARNING)

1853

if debuglevel:

1854

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

1855

syslogger.setLevel(level)

1856

console.setLevel(level)

1857

2141

1858

if debug:

2142

1859

# Enable all possible GnuTLS debugging

2143

1860

2157

1874

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

2158

1875

if null > 2:

2159

1876

os.close(null)

1877

else:

1878

# No console logging

1879

logger.removeHandler(console)

2160

1880

2161

1881

# Need to fork before connecting to D-Bus

2162

1882

if not debug:

2163

1883

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

2164

1884

daemon()

2165

1885

2166

gobject.threads_init()

2167

2168

1886

global main_loop

2169

1887

# From the Avahi example code

2170

1888

DBusGMainLoop(set_as_default=True )

2173

1891

# End of Avahi example code

2174

1892

if use_dbus:

2175

1893

try:

2176

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

1894

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

2177

1895

bus, do_not_queue=True)

2178

old_bus_name = (dbus.service.BusName

2179

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

2180

do_not_queue=True))

2181

1896

except dbus.exceptions.NameExistsException as e:

2182

1897

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

2183

1898

use_dbus = False

2184

1899

server_settings["use_dbus"] = False

2185

1900

tcp_server.use_dbus = False

2186

1901

protocol = avahi.PROTO_INET6 if use_ipv6 else avahi.PROTO_INET

2187

service = AvahiServiceToSyslog(name =

2188

server_settings["servicename"],

2189

servicetype = "_mandos._tcp",

2190

protocol = protocol, bus = bus)

1902

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

1903

servicetype = "_mandos._tcp",

1904

protocol = protocol, bus = bus)

2191

1905

if server_settings["interface"]:

2192

1906

service.interface = (if_nametoindex

2193

1907

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

2197

1911

2198

1912

client_class = Client

2199

1913

if use_dbus:

2200

client_class = functools.partial(ClientDBusTransitional,

2201

bus = bus)

2202

2203

client_settings = Client.config_parser(client_config)

2204

old_client_settings = {}

2205

clients_data = {}

2206

2207

# Get client data and settings from last running state.

2208

if server_settings["restore"]:

2209

try:

2210

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

2211

clients_data, old_client_settings = (pickle.load

2212

(stored_state))

2213

os.remove(stored_state_path)

2214

except IOError as e:

2215

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

2216

.format(e))

2217

if e.errno != errno.ENOENT:

2218

raise

2219

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

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):

2266

1922

try:

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

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()))

2290

1932

if not tcp_server.clients:

2291

1933

logger.warning("No clients defined")

2292

1934

2303

1945

# "pidfile" was never created

2304

1946

pass

2305

1947

del pidfilename

1948

2306

1949

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

2307

1950

2308

1951

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

2309

1952

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

2310

1953

2313

1956

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

2314

1957

def __init__(self):

2315

1958

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

2316

_interface = "se.recompile.Mandos"

1959

_interface = "se.bsnet.fukt.Mandos"

2317

1960

2318

1961

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

2319

1962

def ClientAdded(self, objpath):

2334

1977

def GetAllClients(self):

2335

1978

"D-Bus method"

2336

1979

return dbus.Array(c.dbus_object_path

2337

for c in

2338

tcp_server.clients.itervalues())

1980

for c in tcp_server.clients)

2339

1981

2340

1982

@dbus.service.method(_interface,

2341

1983

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

2343

1985

"D-Bus method"

2344

1986

return dbus.Dictionary(

2345

1987

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

2346

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

1988

for c in tcp_server.clients),

2347

1989

signature="oa{sv}")

2348

1990

2349

1991

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

2350

1992

def RemoveClient(self, object_path):

2351

1993

"D-Bus method"

2352

for c in tcp_server.clients.itervalues():

1994

for c in tcp_server.clients:

2353

1995

if c.dbus_object_path == object_path:

2354

del tcp_server.clients[c.name]

1996

tcp_server.clients.remove(c)

2355

1997

c.remove_from_connection()

2356

1998

# Don't signal anything except ClientRemoved

2357

1999

c.disable(quiet=True)

2362

2004

2363

2005

del _interface

2364

2006

2365

class MandosDBusServiceTransitional(MandosDBusService):

2366

__metaclass__ = AlternateDBusNamesMetaclass

2367

mandos_dbus_service = MandosDBusServiceTransitional()

2007

mandos_dbus_service = MandosDBusService()

2368

2008

2369

2009

def cleanup():

2370

2010

"Cleanup function; run on exit"

2371

2011

service.cleanup()

2372

2012

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

2426

2013

while tcp_server.clients:

2427

name, client = tcp_server.clients.popitem()

2014

client = tcp_server.clients.pop()

2428

2015

if use_dbus:

2429

2016

client.remove_from_connection()

2017

client.disable_hook = None

2430

2018

# Don't signal anything except ClientRemoved

2431

2019

client.disable(quiet=True)

2432

2020

if use_dbus:

2433

2021

# Emit D-Bus signal

2434

mandos_dbus_service.ClientRemoved(client

2435

.dbus_object_path,

2022

mandos_dbus_service.ClientRemoved(client.dbus_object_path,

2436

2023

client.name)

2437

client_settings.clear()

2438

2024

2439

2025

atexit.register(cleanup)

2440

2026

2441

for client in tcp_server.clients.itervalues():

2027

for client in tcp_server.clients:

2442

2028

if use_dbus:

2443

2029

# Emit D-Bus signal

2444

2030

mandos_dbus_service.ClientAdded(client.dbus_object_path)

2445

# Need to initiate checking of clients

2446

if client.enabled:

2447

client.init_checker()

2031

client.enable()

2448

2032

2449

2033

tcp_server.enable()

2450

2034

tcp_server.server_activate()