/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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191

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)

205

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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273

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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327

try:

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328

self.group.Free()

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329

except (dbus.exceptions.UnknownMethodException,

226

dbus.exceptions.DBusException) as e:

330

dbus.exceptions.DBusException):

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331

pass

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self.group = None

229

333

self.remove()

263

367

self.server_state_changed)

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

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369

370

class AvahiServiceToSyslog(AvahiService):

371

def rename(self):

372

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

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ret = AvahiService.rename(self)

374

syslogger.setFormatter(logging.Formatter

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

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

377

% self.name))

378

return ret

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379

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def _timedelta_to_milliseconds(td):

380

def timedelta_to_milliseconds(td):

268

381

"Convert a datetime.timedelta() to milliseconds"

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382

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

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383

+ (td.seconds * 1000)

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387

"""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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401

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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430

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

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431

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

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

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433

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",

440

"approved_by_default": "True",

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"enabled": "True",

442

}

443

317

444

def timeout_milliseconds(self):

318

445

"Return the 'timeout' attribute in milliseconds"

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return _timedelta_to_milliseconds(self.timeout)

320

446

return timedelta_to_milliseconds(self.timeout)

447

321

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def extended_timeout_milliseconds(self):

322

449

"Return the 'extended_timeout' attribute in milliseconds"

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return _timedelta_to_milliseconds(self.extended_timeout)

450

return timedelta_to_milliseconds(self.extended_timeout)

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451

325

452

def interval_milliseconds(self):

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453

"Return the 'interval' attribute in milliseconds"

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return _timedelta_to_milliseconds(self.interval)

328

454

return timedelta_to_milliseconds(self.interval)

455

329

456

def approval_delay_milliseconds(self):

330

return _timedelta_to_milliseconds(self.approval_delay)

331

332

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

457

return timedelta_to_milliseconds(self.approval_delay)

458

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"]

470

# Reformat values from string types to Python types

471

client["approved_by_default"] = config.getboolean(

472

client_name, "approved_by_default")

473

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

474

475

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

476

.replace(" ", ""))

477

if "secret" in section:

478

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

479

elif "secfile" in section:

480

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

481

(section["secfile"])),

482

"rb") as secfile:

483

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

484

else:

485

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

486

% section)

487

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

488

client["extended_timeout"] = string_to_delta(

489

section["extended_timeout"])

490

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

491

client["approval_delay"] = string_to_delta(

492

section["approval_delay"])

493

client["approval_duration"] = string_to_delta(

494

section["approval_duration"])

495

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

496

client["last_approval_request"] = None

497

client["last_checked_ok"] = None

498

client["last_checker_status"] = None

499

if client["enabled"]:

500

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

501

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

502

+ client["timeout"])

503

else:

504

client["last_enabled"] = None

505

client["expires"] = None

506

507

return settings

508

509

510

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

333

511

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

334

512

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

335

513

attribute."""

336

514

self.name = name

337

if config is None:

338

config = {}

515

# adding all client settings

516

for setting, value in settings.iteritems():

517

setattr(self, setting, value)

518

339

519

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

340

520

# Uppercase and remove spaces from fingerprint for later

341

521

# comparison purposes with return value from the fingerprint()

342

522

# function

343

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

344

.replace(" ", ""))

345

523

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

346

if "secret" in config:

347

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

348

elif "secfile" in config:

349

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

350

(config["secfile"])),

351

"rb") as secfile:

352

self.secret = secfile.read()

353

else:

354

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

355

% self.name)

356

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

357

self.created = datetime.datetime.utcnow()

358

self.enabled = False

359

self.last_approval_request = None

360

self.last_enabled = None

361

self.last_checked_ok = None

362

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

363

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

364

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

365

self.disable_hook = disable_hook

524

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

525

526

# attributes specific for this server instance

366

527

self.checker = None

367

528

self.checker_initiator_tag = None

368

529

self.disable_initiator_tag = None

369

self.expires = None

370

530

self.checker_callback_tag = None

371

self.checker_command = config["checker"]

372

531

self.current_checker_command = None

373

self.last_connect = None

374

self._approved = None

375

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

376

True)

532

self.approved = None

377

533

self.approvals_pending = 0

378

self.approval_delay = string_to_delta(

379

config["approval_delay"])

380

self.approval_duration = string_to_delta(

381

config["approval_duration"])

382

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)

383

548

549

# Send notice to process children that client state has changed

384

550

def send_changedstate(self):

385

self.changedstate.acquire()

386

self.changedstate.notify_all()

387

self.changedstate.release()

388

551

with self.changedstate:

552

self.changedstate.notify_all()

553

389

554

def enable(self):

390

555

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

391

556

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

392

557

# Already enabled

393

558

return

394

559

self.send_changedstate()

395

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

396

# and every interval from then on.

397

self.checker_initiator_tag = (gobject.timeout_add

398

(self.interval_milliseconds(),

399

self.start_checker))

400

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

401

560

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

402

self.disable_initiator_tag = (gobject.timeout_add

403

(self.timeout_milliseconds(),

404

self.disable))

405

561

self.enabled = True

406

562

self.last_enabled = datetime.datetime.utcnow()

407

# Also start a new checker *right now*.

408

self.start_checker()

563

self.init_checker()

409

564

410

565

def disable(self, quiet=True):

411

566

"""Disable this client."""

423

578

gobject.source_remove(self.checker_initiator_tag)

424

579

self.checker_initiator_tag = None

425

580

self.stop_checker()

426

if self.disable_hook:

427

self.disable_hook(self)

428

581

self.enabled = False

429

582

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

430

583

return False

431

584

432

585

def __del__(self):

433

self.disable_hook = None

434

586

self.disable()

435

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

436

601

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

437

602

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

438

603

self.checker_callback_tag = None

439

604

self.checker = None

440

605

if os.WIFEXITED(condition):

441

exitstatus = os.WEXITSTATUS(condition)

442

if exitstatus == 0:

606

self.last_checker_status = os.WEXITSTATUS(condition)

607

if self.last_checker_status == 0:

443

608

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

444

609

vars(self))

445

610

self.checked_ok()

447

612

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

448

613

vars(self))

449

614

else:

615

self.last_checker_status = -1

450

616

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

451

617

vars(self))

452

618

459

625

if timeout is None:

460

626

timeout = self.timeout

461

627

self.last_checked_ok = datetime.datetime.utcnow()

462

gobject.source_remove(self.disable_initiator_tag)

463

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

464

self.disable_initiator_tag = (gobject.timeout_add

465

(_timedelta_to_milliseconds(timeout),

466

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

467

635

468

636

def need_approval(self):

469

637

self.last_approval_request = datetime.datetime.utcnow()

509

677

'replace')))

510

678

for attr in

511

679

self.runtime_expansions)

512

680

513

681

try:

514

682

command = self.checker_command % escaped_attrs

515

683

except TypeError as error:

561

729

raise

562

730

self.checker = None

563

731

732

564

733

def dbus_service_property(dbus_interface, signature="v",

565

734

access="readwrite", byte_arrays=False):

566

735

"""Decorators for marking methods of a DBusObjectWithProperties to

612

781

613

782

class DBusObjectWithProperties(dbus.service.Object):

614

783

"""A D-Bus object with properties.

615

784

616

785

Classes inheriting from this can use the dbus_service_property

617

786

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

618

787

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

625

794

def _get_all_dbus_properties(self):

626

795

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

627

796

"""

628

return ((prop._dbus_name, prop)

797

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

798

for cls in self.__class__.__mro__

629

799

for name, prop in

630

inspect.getmembers(self, self._is_dbus_property))

800

inspect.getmembers(cls, self._is_dbus_property))

631

801

632

802

def _get_dbus_property(self, interface_name, property_name):

633

803

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

634

804

property with the specified name and interface.

635

805

"""

636

for name in (property_name,

637

property_name + "_dbus_property"):

638

prop = getattr(self, name, None)

639

if (prop is None

640

or not self._is_dbus_property(prop)

641

or prop._dbus_name != property_name

642

or (interface_name and prop._dbus_interface

643

and interface_name != prop._dbus_interface)):

644

continue

645

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

646

813

# No such property

647

814

raise DBusPropertyNotFound(self.dbus_object_path + ":"

648

815

+ interface_name + "."

682

849

def GetAll(self, interface_name):

683

850

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

684

851

standard.

685

852

686

853

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

687

854

"""

688

all = {}

855

properties = {}

689

856

for name, prop in self._get_all_dbus_properties():

690

857

if (interface_name

691

858

and interface_name != prop._dbus_interface):

696

863

continue

697

864

value = prop()

698

865

if not hasattr(value, "variant_level"):

699

all[name] = value

866

properties[name] = value

700

867

continue

701

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

702

value.variant_level+1)

703

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")

704

871

705

872

@dbus.service.method(dbus.INTROSPECTABLE_IFACE,

706

873

out_signature="s",

757

924

return dbus.String(dt.isoformat(),

758

925

variant_level=variant_level)

759

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

760

1026

class ClientDBus(Client, DBusObjectWithProperties):

761

1027

"""A Client class using D-Bus

762

1028

771

1037

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

772

1038

773

1039

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

774

self._approvals_pending = 0

775

1040

self.bus = bus

776

1041

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

1042

self._approvals_pending = 0

1043

1044

self._approvals_pending = 0

777

1045

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

778

1046

# the D-Bus

779

1047

client_object_name = unicode(self.name).translate(

787

1055

def notifychangeproperty(transform_func,

788

1056

dbus_name, type_func=lambda x: x,

789

1057

variant_level=1):

790

""" Modify a variable so that its a property that announce its

791

changes to DBus.

792

transform_fun: Function that takes a value and transform it to

793

DBus type.

794

dbus_name: DBus name of the variable

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

795

1064

type_func: Function that transform the value before sending it

796

to DBus

797

variant_level: DBus variant level. default: 1

1065

to the D-Bus. Default: no transform

1066

variant_level: D-Bus variant level. Default: 1

798

1067

"""

799

real_value = [None,]

1068

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

800

1069

def setter(self, value):

801

old_value = real_value[0]

802

real_value[0] = value

803

1070

if hasattr(self, "dbus_object_path"):

804

if type_func(old_value) != type_func(real_value[0]):

805

dbus_value = transform_func(type_func(real_value[0]),

806

variant_level)

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)

807

1077

self.PropertyChanged(dbus.String(dbus_name),

808

1078

dbus_value)

809

810

return property(lambda self: real_value[0], setter)

811

812

1079

setattr(self, attrname, value)

1080

1081

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

1082

1083

813

1084

expires = notifychangeproperty(datetime_to_dbus, "Expires")

814

1085

approvals_pending = notifychangeproperty(dbus.Boolean,

815

1086

"ApprovalPending",

818

1089

last_enabled = notifychangeproperty(datetime_to_dbus,

819

1090

"LastEnabled")

820

1091

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

821

type_func = lambda checker: checker is not None)

1092

type_func = lambda checker:

1093

checker is not None)

822

1094

last_checked_ok = notifychangeproperty(datetime_to_dbus,

823

1095

"LastCheckedOK")

824

last_approval_request = notifychangeproperty(datetime_to_dbus,

825

"LastApprovalRequest")

1096

last_approval_request = notifychangeproperty(

1097

datetime_to_dbus, "LastApprovalRequest")

826

1098

approved_by_default = notifychangeproperty(dbus.Boolean,

827

1099

"ApprovedByDefault")

828

approval_delay = notifychangeproperty(dbus.UInt16, "ApprovalDelay",

829

type_func = _timedelta_to_milliseconds)

830

approval_duration = notifychangeproperty(dbus.UInt16, "ApprovalDuration",

831

type_func = _timedelta_to_milliseconds)

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)

832

1107

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

833

timeout = notifychangeproperty(dbus.UInt16, "Timeout",

834

type_func = _timedelta_to_milliseconds)

835

extended_timeout = notifychangeproperty(dbus.UInt16, "ExtendedTimeout",

836

type_func = _timedelta_to_milliseconds)

837

interval = notifychangeproperty(dbus.UInt16, "Interval",

838

type_func = _timedelta_to_milliseconds)

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)

839

1118

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

840

1119

841

1120

del notifychangeproperty

867

1146

868

1147

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

869

1148

*args, **kwargs)

870

1149

871

1150

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

872

1151

old_checker = self.checker

873

1152

if self.checker is not None:

883

1162

return r

884

1163

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(_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

1001

1288

access="readwrite")

1002

1289

def ApprovalDuration_dbus_property(self, value=None):

1003

1290

if value is None: # get

1004

return dbus.UInt64(_timedelta_to_milliseconds(

1291

return dbus.UInt64(timedelta_to_milliseconds(

1005

1292

self.approval_duration))

1006

1293

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

1007

1294

1021

1308

def Host_dbus_property(self, value=None):

1022

1309

if value is None: # get

1023

1310

return dbus.String(self.host)

1024

self.host = value

1311

self.host = unicode(value)

1025

1312

1026

1313

# Created - property

1027

1314

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

1028

1315

def Created_dbus_property(self):

1029

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

1316

return datetime_to_dbus(self.created)

1030

1317

1031

1318

# LastEnabled - property

1032

1319

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

1076

1363

gobject.source_remove(self.disable_initiator_tag)

1077

1364

self.disable_initiator_tag = None

1078

1365

self.expires = None

1079

time_to_die = (self.

1080

_timedelta_to_milliseconds((self

1081

.last_checked_ok

1082

+ self.timeout)

1083

- datetime.datetime

1084

.utcnow()))

1366

time_to_die = timedelta_to_milliseconds((self

1367

.last_checked_ok

1368

+ self.timeout)

1369

- datetime.datetime

1370

.utcnow())

1085

1371

if time_to_die <= 0:

1086

1372

# The timeout has passed

1087

1373

self.disable()

1088

1374

else:

1089

1375

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

1090

+ datetime.timedelta(milliseconds = time_to_die))

1376

+ datetime.timedelta(milliseconds =

1377

time_to_die))

1091

1378

self.disable_initiator_tag = (gobject.timeout_add

1092

1379

(time_to_die, self.disable))

1093

1380

1094

1381

# ExtendedTimeout - property

1095

1382

@dbus_service_property(_interface, signature="t",

1096

1383

access="readwrite")

1098

1385

if value is None: # get

1099

1386

return dbus.UInt64(self.extended_timeout_milliseconds())

1100

1387

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

1101

1388

1102

1389

# Interval - property

1103

1390

@dbus_service_property(_interface, signature="t",

1104

1391

access="readwrite")

1108

1395

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

1109

1396

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

1110

1397

return

1111

# Reschedule checker run

1112

gobject.source_remove(self.checker_initiator_tag)

1113

self.checker_initiator_tag = (gobject.timeout_add

1114

(value, self.start_checker))

1115

self.start_checker() # Start one now, too

1116

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

1117

1405

# Checker - property

1118

1406

@dbus_service_property(_interface, signature="s",

1119

1407

access="readwrite")

1120

1408

def Checker_dbus_property(self, value=None):

1121

1409

if value is None: # get

1122

1410

return dbus.String(self.checker_command)

1123

self.checker_command = value

1411

self.checker_command = unicode(value)

1124

1412

1125

1413

# CheckerRunning - property

1126

1414

@dbus_service_property(_interface, signature="b",

1153

1441

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

1154

1442

if not self._pipe.recv():

1155

1443

raise KeyError()

1156

1444

1157

1445

def __getattribute__(self, name):

1158

if(name == '_pipe'):

1446

if name == '_pipe':

1159

1447

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

1160

1448

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

1161

1449

data = self._pipe.recv()

1166

1454

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

1167

1455

return self._pipe.recv()[1]

1168

1456

return func

1169

1457

1170

1458

def __setattr__(self, name, value):

1171

if(name == '_pipe'):

1459

if name == '_pipe':

1172

1460

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

1173

1461

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

1174

1462

1175

1463

1464

class ClientDBusTransitional(ClientDBus):

1465

__metaclass__ = AlternateDBusNamesMetaclass

1466

1467

1176

1468

class ClientHandler(socketserver.BaseRequestHandler, object):

1177

1469

"""A class to handle client connections.

1178

1470

1185

1477

unicode(self.client_address))

1186

1478

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

1187

1479

self.server.child_pipe.fileno())

1188

1480

1189

1481

session = (gnutls.connection

1190

1482

.ClientSession(self.request,

1191

1483

gnutls.connection

1192

1484

.X509Credentials()))

1193

1485

1194

1486

# Note: gnutls.connection.X509Credentials is really a

1195

1487

# generic GnuTLS certificate credentials object so long as

1196

1488

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

1197

1489

# here despite using OpenPGP certificates.

1198

1490

1199

1491

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

1200

1492

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

1201

1493

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

1207

1499

(gnutls.library.functions

1208

1500

.gnutls_priority_set_direct(session._c_object,

1209

1501

priority, None))

1210

1502

1211

1503

# Start communication using the Mandos protocol

1212

1504

# Get protocol number

1213

1505

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

1218

1510

except (ValueError, IndexError, RuntimeError) as error:

1219

1511

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

1220

1512

return

1221

1513

1222

1514

# Start GnuTLS connection

1223

1515

try:

1224

1516

session.handshake()

1228

1520

# established. Just abandon the request.

1229

1521

return

1230

1522

logger.debug("Handshake succeeded")

1231

1523

1232

1524

approval_required = False

1233

1525

try:

1234

1526

try:

1239

1531

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

1240

1532

return

1241

1533

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

1242

1534

1243

1535

try:

1244

1536

client = ProxyClient(child_pipe, fpr,

1245

1537

self.client_address)

1246

1538

except KeyError:

1247

1539

return

1248

1540

1541

if self.server.use_dbus:

1542

# Emit D-Bus signal

1543

client.NewRequest(str(self.client_address))

1544

1249

1545

if client.approval_delay:

1250

1546

delay = client.approval_delay

1251

1547

client.approvals_pending += 1

1257

1553

client.name)

1258

1554

if self.server.use_dbus:

1259

1555

# Emit D-Bus signal

1260

client.Rejected("Disabled")

1556

client.Rejected("Disabled")

1261

1557

return

1262

1558

1263

if client._approved or not client.approval_delay:

1559

if client.approved or not client.approval_delay:

1264

1560

#We are approved or approval is disabled

1265

1561

break

1266

elif client._approved is None:

1562

elif client.approved is None:

1267

1563

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

1268

1564

client.name)

1269

1565

if self.server.use_dbus:

1280

1576

return

1281

1577

1282

1578

#wait until timeout or approved

1283

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

1284

1579

time = datetime.datetime.now()

1285

1580

client.changedstate.acquire()

1286

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

1581

(client.changedstate.wait

1582

(float(client.timedelta_to_milliseconds(delay)

1583

/ 1000)))

1287

1584

client.changedstate.release()

1288

1585

time2 = datetime.datetime.now()

1289

1586

if (time2 - time) >= delay:

1311

1608

sent, len(client.secret)

1312

1609

- (sent_size + sent))

1313

1610

sent_size += sent

1314

1611

1315

1612

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

1316

# bump the timeout as if seen

1613

# bump the timeout using extended_timeout

1317

1614

client.checked_ok(client.extended_timeout)

1318

1615

if self.server.use_dbus:

1319

1616

# Emit D-Bus signal

1387

1684

# Convert the buffer to a Python bytestring

1388

1685

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

1389

1686

# Convert the bytestring to hexadecimal notation

1390

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

1687

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

1391

1688

return hex_fpr

1392

1689

1393

1690

1396

1693

def sub_process_main(self, request, address):

1397

1694

try:

1398

1695

self.finish_request(request, address)

1399

except:

1696

except Exception:

1400

1697

self.handle_error(request, address)

1401

1698

self.close_request(request)

1402

1699

1403

1700

def process_request(self, request, address):

1404

1701

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

1405

multiprocessing.Process(target = self.sub_process_main,

1406

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

1407

1708

1408

1709

class MultiprocessingMixInWithPipe(MultiprocessingMixIn, object):

1409

1710

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

1413

1714

This function creates a new pipe in self.pipe

1414

1715

"""

1415

1716

parent_pipe, self.child_pipe = multiprocessing.Pipe()

1416

1417

super(MultiprocessingMixInWithPipe,

1418

self).process_request(request, client_address)

1717

1718

proc = MultiprocessingMixIn.process_request(self, request,

1719

client_address)

1419

1720

self.child_pipe.close()

1420

self.add_pipe(parent_pipe)

1421

1422

def add_pipe(self, parent_pipe):

1721

self.add_pipe(parent_pipe, proc)

1722

1723

def add_pipe(self, parent_pipe, proc):

1423

1724

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

1424

1725

raise NotImplementedError

1425

1726

1727

1426

1728

class IPv6_TCPServer(MultiprocessingMixInWithPipe,

1427

1729

socketserver.TCPServer, object):

1428

1730

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

1502

1804

self.enabled = False

1503

1805

self.clients = clients

1504

1806

if self.clients is None:

1505

self.clients = set()

1807

self.clients = {}

1506

1808

self.use_dbus = use_dbus

1507

1809

self.gnutls_priority = gnutls_priority

1508

1810

IPv6_TCPServer.__init__(self, server_address,

1512

1814

def server_activate(self):

1513

1815

if self.enabled:

1514

1816

return socketserver.TCPServer.server_activate(self)

1817

1515

1818

def enable(self):

1516

1819

self.enabled = True

1517

def add_pipe(self, parent_pipe):

1820

1821

def add_pipe(self, parent_pipe, proc):

1518

1822

# Call "handle_ipc" for both data and EOF events

1519

1823

gobject.io_add_watch(parent_pipe.fileno(),

1520

1824

gobject.IO_IN | gobject.IO_HUP,

1521

1825

functools.partial(self.handle_ipc,

1522

parent_pipe = parent_pipe))

1523

1826

parent_pipe =

1827

parent_pipe,

1828

proc = proc))

1829

1524

1830

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

1525

client_object=None):

1831

proc = None, client_object=None):

1526

1832

condition_names = {

1527

1833

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

1528

1834

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

1537

1843

for cond, name in

1538

1844

condition_names.iteritems()

1539

1845

if cond & condition)

1540

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

1846

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

1541

1847

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

1848

# Wait for other process to exit

1849

proc.join()

1542

1850

return False

1543

1851

1544

1852

# Read a request from the child

1549

1857

fpr = request[1]

1550

1858

address = request[2]

1551

1859

1552

for c in self.clients:

1860

for c in self.clients.itervalues():

1553

1861

if c.fingerprint == fpr:

1554

1862

client = c

1555

1863

break

1558

1866

"dress: %s", fpr, address)

1559

1867

if self.use_dbus:

1560

1868

# Emit D-Bus signal

1561

mandos_dbus_service.ClientNotFound(fpr, address[0])

1869

mandos_dbus_service.ClientNotFound(fpr,

1870

address[0])

1562

1871

parent_pipe.send(False)

1563

1872

return False

1564

1873

1565

1874

gobject.io_add_watch(parent_pipe.fileno(),

1566

1875

gobject.IO_IN | gobject.IO_HUP,

1567

1876

functools.partial(self.handle_ipc,

1568

parent_pipe = parent_pipe,

1569

client_object = client))

1877

parent_pipe =

1878

parent_pipe,

1879

proc = proc,

1880

client_object =

1881

client))

1570

1882

parent_pipe.send(True)

1571

# 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

1572

1885

return False

1573

1886

if command == 'funcall':

1574

1887

funcname = request[1]

1575

1888

args = request[2]

1576

1889

kwargs = request[3]

1577

1890

1578

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

1579

1891

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

1892

funcname)(*args,

1893

**kwargs)))

1894

1580

1895

if command == 'getattr':

1581

1896

attrname = request[1]

1582

1897

if callable(client_object.__getattribute__(attrname)):

1583

1898

parent_pipe.send(('function',))

1584

1899

else:

1585

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

1900

parent_pipe.send(('data', client_object

1901

.__getattribute__(attrname)))

1586

1902

1587

1903

if command == 'setattr':

1588

1904

attrname = request[1]

1589

1905

value = request[2]

1590

1906

setattr(client_object, attrname, value)

1591

1907

1592

1908

return True

1593

1909

1594

1910

1631

1947

return timevalue

1632

1948

1633

1949

1634

def if_nametoindex(interface):

1635

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

1636

1637

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

1638

global if_nametoindex

1639

try:

1640

if_nametoindex = (ctypes.cdll.LoadLibrary

1641

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

1642

.if_nametoindex)

1643

except (OSError, AttributeError):

1644

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

1645

def if_nametoindex(interface):

1646

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

1647

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

1648

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

1649

ifreq = fcntl.ioctl(s, SIOCGIFINDEX,

1650

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

1651

interface))

1652

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

1653

ifreq[16:20])[0]

1654

return interface_index

1655

return if_nametoindex(interface)

1656

1657

1658

1950

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

1659

1951

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

1660

1952

1715

2007

" system bus interface")

1716

2008

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

1717

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

1718

2016

options = parser.parse_args()

1719

2017

1720

2018

if options.check:

1733

2031

"use_dbus": "True",

1734

2032

"use_ipv6": "True",

1735

2033

"debuglevel": "",

2034

"restore": "True",

2035

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

1736

2036

}

1737

2037

1738

2038

# Parse config file for server-global settings

1755

2055

# options, if set.

1756

2056

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

1757

2057

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

1758

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

2058

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

2059

"statedir"):

1759

2060

value = getattr(options, option)

1760

2061

if value is not None:

1761

2062

server_settings[option] = value

1773

2074

debuglevel = server_settings["debuglevel"]

1774

2075

use_dbus = server_settings["use_dbus"]

1775

2076

use_ipv6 = server_settings["use_ipv6"]

1776

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

1777

2089

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

1778

2090

syslogger.setFormatter(logging.Formatter

1779

2091

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

1781

2093

% server_settings["servicename"]))

1782

2094

1783

2095

# Parse config file with clients

1784

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

1785

"extended_timeout": "15m",

1786

"interval": "2m",

1787

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

1788

"host": "",

1789

"approval_delay": "0s",

1790

"approval_duration": "1s",

1791

}

1792

client_config = configparser.SafeConfigParser(client_defaults)

2096

client_config = configparser.SafeConfigParser(Client.client_defaults)

1793

2097

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

1794

2098

"clients.conf"))

1795

2099

1833

2137

if error[0] != errno.EPERM:

1834

2138

raise error

1835

2139

1836

if not debug and not debuglevel:

1837

syslogger.setLevel(logging.WARNING)

1838

console.setLevel(logging.WARNING)

1839

if debuglevel:

1840

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

1841

syslogger.setLevel(level)

1842

console.setLevel(level)

1843

1844

2140

if debug:

1845

2141

# Enable all possible GnuTLS debugging

1846

2142

1877

2173

# End of Avahi example code

1878

2174

if use_dbus:

1879

2175

try:

1880

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

2176

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

1881

2177

bus, do_not_queue=True)

2178

old_bus_name = (dbus.service.BusName

2179

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

2180

do_not_queue=True))

1882

2181

except dbus.exceptions.NameExistsException as e:

1883

2182

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

1884

2183

use_dbus = False

1885

2184

server_settings["use_dbus"] = False

1886

2185

tcp_server.use_dbus = False

1887

2186

protocol = avahi.PROTO_INET6 if use_ipv6 else avahi.PROTO_INET

1888

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

1889

servicetype = "_mandos._tcp",

1890

protocol = protocol, bus = bus)

2187

service = AvahiServiceToSyslog(name =

2188

server_settings["servicename"],

2189

servicetype = "_mandos._tcp",

2190

protocol = protocol, bus = bus)

1891

2191

if server_settings["interface"]:

1892

2192

service.interface = (if_nametoindex

1893

2193

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

1897

2197

1898

2198

client_class = Client

1899

2199

if use_dbus:

1900

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

1901

def client_config_items(config, section):

1902

special_settings = {

1903

"approved_by_default":

1904

lambda: config.getboolean(section,

1905

"approved_by_default"),

1906

}

1907

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

1908

2263

try:

1909

yield (name, special_settings[name]())

1910

except KeyError:

1911

yield (name, value)

1912

1913

tcp_server.clients.update(set(

1914

client_class(name = section,

1915

config= dict(client_config_items(

1916

client_config, section)))

1917

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

1918

2287

if not tcp_server.clients:

1919

2288

logger.warning("No clients defined")

1920

2289

1931

2300

# "pidfile" was never created

1932

2301

pass

1933

2302

del pidfilename

1934

1935

2303

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

1936

2304

1937

2305

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

1938

2306

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

1939

2307

1942

2310

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

1943

2311

def __init__(self):

1944

2312

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

1945

_interface = "se.bsnet.fukt.Mandos"

2313

_interface = "se.recompile.Mandos"

1946

2314

1947

2315

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

1948

2316

def ClientAdded(self, objpath):

1963

2331

def GetAllClients(self):

1964

2332

"D-Bus method"

1965

2333

return dbus.Array(c.dbus_object_path

1966

for c in tcp_server.clients)

2334

for c in

2335

tcp_server.clients.itervalues())

1967

2336

1968

2337

@dbus.service.method(_interface,

1969

2338

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

1971

2340

"D-Bus method"

1972

2341

return dbus.Dictionary(

1973

2342

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

1974

for c in tcp_server.clients),

2343

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

1975

2344

signature="oa{sv}")

1976

2345

1977

2346

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

1978

2347

def RemoveClient(self, object_path):

1979

2348

"D-Bus method"

1980

for c in tcp_server.clients:

2349

for c in tcp_server.clients.itervalues():

1981

2350

if c.dbus_object_path == object_path:

1982

tcp_server.clients.remove(c)

2351

del tcp_server.clients[c.name]

1983

2352

c.remove_from_connection()

1984

2353

# Don't signal anything except ClientRemoved

1985

2354

c.disable(quiet=True)

1990

2359

1991

2360

del _interface

1992

2361

1993

mandos_dbus_service = MandosDBusService()

2362

class MandosDBusServiceTransitional(MandosDBusService):

2363

__metaclass__ = AlternateDBusNamesMetaclass

2364

mandos_dbus_service = MandosDBusServiceTransitional()

1994

2365

1995

2366

def cleanup():

1996

2367

"Cleanup function; run on exit"

1997

2368

service.cleanup()

1998

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

1999

2414

while tcp_server.clients:

2000

client = tcp_server.clients.pop()

2415

name, client = tcp_server.clients.popitem()

2001

2416

if use_dbus:

2002

2417

client.remove_from_connection()

2003

client.disable_hook = None

2004

2418

# Don't signal anything except ClientRemoved

2005

2419

client.disable(quiet=True)

2006

2420

if use_dbus:

2007

2421

# Emit D-Bus signal

2008

mandos_dbus_service.ClientRemoved(client.dbus_object_path,

2422

mandos_dbus_service.ClientRemoved(client

2423

.dbus_object_path,

2009

2424

client.name)

2425

client_settings.clear()

2010

2426

2011

2427

atexit.register(cleanup)

2012

2428

2013

for client in tcp_server.clients:

2429

for client in tcp_server.clients.itervalues():

2014

2430

if use_dbus:

2015

2431

# Emit D-Bus signal

2016

2432

mandos_dbus_service.ClientAdded(client.dbus_object_path)

2017

client.enable()

2433

# Need to initiate checking of clients

2434

if client.enabled:

2435

client.init_checker()

2018

2436

2019

2437

tcp_server.enable()

2020

2438

tcp_server.server_activate()