/mandos/release : revision 237.17.3

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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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96

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()

187

except IOError as e:

188

raise PGPError(e)

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self.gnupg.passphrase = None

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return ciphertext

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192

def decrypt(self, data, password):

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

194

with open(os.devnull) as devnull:

195

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()

204

except IOError as e:

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raise PGPError(e)

206

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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267

" after %i retries, exiting.",

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self.rename_count)

161

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raise AvahiServiceError("Too many renames")

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

270

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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274

self.remove()

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try:

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self.add()

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296

avahi.DBUS_INTERFACE_ENTRY_GROUP)

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297

self.entry_group_state_changed_match = (

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self.group.connect_to_signal(

194

'StateChanged', self .entry_group_state_changed))

299

'StateChanged', self.entry_group_state_changed))

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

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self.name, self.type)

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self.group.AddService(

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328

try:

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329

self.group.Free()

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except (dbus.exceptions.UnknownMethodException,

226

dbus.exceptions.DBusException) as e:

331

dbus.exceptions.DBusException):

227

332

pass

228

333

self.group = None

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334

self.remove()

263

368

self.server_state_changed)

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369

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

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371

class AvahiServiceToSyslog(AvahiService):

372

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'

378

% self.name))

379

return ret

266

380

381

def timedelta_to_milliseconds(td):

382

"Convert a datetime.timedelta() to milliseconds"

383

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

384

+ (td.seconds * 1000)

385

+ (td.microseconds // 1000))

386

267

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class Client(object):

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388

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

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270

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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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392

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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401

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

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checker_initiator_tag: a gobject event source tag, or None

283

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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

287

408

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

293

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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

417

checker, or None.

418

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

299

423

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

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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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428

"""

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

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

309

433

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

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@staticmethod

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def _timedelta_to_milliseconds(td):

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"Convert a datetime.timedelta() to milliseconds"

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

315

+ (td.seconds * 1000)

316

+ (td.microseconds // 1000))

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

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"extended_timeout": "15m",

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"interval": "2m",

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

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"host": "",

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"approval_delay": "0s",

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"approval_duration": "1s",

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"approved_by_default": "True",

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"enabled": "True",

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}

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444

318

445

def timeout_milliseconds(self):

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"Return the 'timeout' attribute in milliseconds"

320

return self._timedelta_to_milliseconds(self.timeout)

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return timedelta_to_milliseconds(self.timeout)

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322

449

def extended_timeout_milliseconds(self):

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450

"Return the 'extended_timeout' attribute in milliseconds"

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return self._timedelta_to_milliseconds(self.extended_timeout)

451

return timedelta_to_milliseconds(self.extended_timeout)

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452

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453

def interval_milliseconds(self):

327

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"Return the 'interval' attribute in milliseconds"

328

return self._timedelta_to_milliseconds(self.interval)

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455

return timedelta_to_milliseconds(self.interval)

456

330

457

def approval_delay_milliseconds(self):

331

return self._timedelta_to_milliseconds(self.approval_delay)

332

333

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

458

return timedelta_to_milliseconds(self.approval_delay)

459

460

@staticmethod

461

def config_parser(config):

462

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

463

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

464

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

465

settings = {}

466

for client_name in config.sections():

467

section = dict(config.items(client_name))

468

client = settings[client_name] = {}

469

470

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

471

# Reformat values from string types to Python types

472

client["approved_by_default"] = config.getboolean(

473

client_name, "approved_by_default")

474

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

475

476

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

477

.replace(" ", ""))

478

if "secret" in section:

479

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

480

elif "secfile" in section:

481

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

482

(section["secfile"])),

483

"rb") as secfile:

484

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

485

else:

486

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

487

% section)

488

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

489

client["extended_timeout"] = string_to_delta(

490

section["extended_timeout"])

491

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

492

client["approval_delay"] = string_to_delta(

493

section["approval_delay"])

494

client["approval_duration"] = string_to_delta(

495

section["approval_duration"])

496

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

497

client["last_approval_request"] = None

498

client["last_checked_ok"] = None

499

client["last_checker_status"] = None

500

if client["enabled"]:

501

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

502

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

503

+ client["timeout"])

504

else:

505

client["last_enabled"] = None

506

client["expires"] = None

507

508

return settings

509

510

511

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

334

512

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

335

513

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

336

514

attribute."""

337

515

self.name = name

338

if config is None:

339

config = {}

516

# adding all client settings

517

for setting, value in settings.iteritems():

518

setattr(self, setting, value)

519

340

520

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

341

521

# Uppercase and remove spaces from fingerprint for later

342

522

# comparison purposes with return value from the fingerprint()

343

523

# function

344

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

345

.replace(" ", ""))

346

524

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

347

if "secret" in config:

348

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

349

elif "secfile" in config:

350

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

351

(config["secfile"])),

352

"rb") as secfile:

353

self.secret = secfile.read()

354

else:

355

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

356

% self.name)

357

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

358

self.created = datetime.datetime.utcnow()

359

self.enabled = False

360

self.last_approval_request = None

361

self.last_enabled = None

362

self.last_checked_ok = None

363

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

364

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

365

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

366

self.disable_hook = disable_hook

525

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

526

527

# attributes specific for this server instance

367

528

self.checker = None

368

529

self.checker_initiator_tag = None

369

530

self.disable_initiator_tag = None

370

self.expires = None

371

531

self.checker_callback_tag = None

372

self.checker_command = config["checker"]

373

532

self.current_checker_command = None

374

self.last_connect = None

375

self._approved = None

376

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

377

True)

533

self.approved = None

378

534

self.approvals_pending = 0

379

self.approval_delay = string_to_delta(

380

config["approval_delay"])

381

self.approval_duration = string_to_delta(

382

config["approval_duration"])

383

self.changedstate = multiprocessing_manager.Condition(multiprocessing_manager.Lock())

535

self.changedstate = (multiprocessing_manager

536

.Condition(multiprocessing_manager

537

.Lock()))

538

self.client_structure = [attr for attr in

539

self.__dict__.iterkeys()

540

if not attr.startswith("_")]

541

self.client_structure.append("client_structure")

542

543

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

544

lambda obj:

545

isinstance(obj,

546

property)):

547

if not name.startswith("_"):

548

self.client_structure.append(name)

384

549

550

# Send notice to process children that client state has changed

385

551

def send_changedstate(self):

386

self.changedstate.acquire()

387

self.changedstate.notify_all()

388

self.changedstate.release()

389

552

with self.changedstate:

553

self.changedstate.notify_all()

554

390

555

def enable(self):

391

556

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

392

557

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

393

558

# Already enabled

394

559

return

395

560

self.send_changedstate()

561

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

562

self.enabled = True

396

563

self.last_enabled = datetime.datetime.utcnow()

397

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

398

# and every interval from then on.

399

self.checker_initiator_tag = (gobject.timeout_add

400

(self.interval_milliseconds(),

401

self.start_checker))

402

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

403

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

404

self.disable_initiator_tag = (gobject.timeout_add

405

(self.timeout_milliseconds(),

406

self.disable))

407

self.enabled = True

408

# Also start a new checker *right now*.

409

self.start_checker()

564

self.init_checker()

410

565

411

566

def disable(self, quiet=True):

412

567

"""Disable this client."""

424

579

gobject.source_remove(self.checker_initiator_tag)

425

580

self.checker_initiator_tag = None

426

581

self.stop_checker()

427

if self.disable_hook:

428

self.disable_hook(self)

429

582

self.enabled = False

430

583

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

431

584

return False

432

585

433

586

def __del__(self):

434

self.disable_hook = None

435

587

self.disable()

436

588

589

def init_checker(self):

590

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

591

# and every interval from then on.

592

self.checker_initiator_tag = (gobject.timeout_add

593

(self.interval_milliseconds(),

594

self.start_checker))

595

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

596

self.disable_initiator_tag = (gobject.timeout_add

597

(self.timeout_milliseconds(),

598

self.disable))

599

# Also start a new checker *right now*.

600

self.start_checker()

601

437

602

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

438

603

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

439

604

self.checker_callback_tag = None

440

605

self.checker = None

441

606

if os.WIFEXITED(condition):

442

exitstatus = os.WEXITSTATUS(condition)

443

if exitstatus == 0:

607

self.last_checker_status = os.WEXITSTATUS(condition)

608

if self.last_checker_status == 0:

444

609

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

445

610

vars(self))

446

611

self.checked_ok()

448

613

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

449

614

vars(self))

450

615

else:

616

self.last_checker_status = -1

451

617

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

452

618

vars(self))

453

619

460

626

if timeout is None:

461

627

timeout = self.timeout

462

628

self.last_checked_ok = datetime.datetime.utcnow()

463

gobject.source_remove(self.disable_initiator_tag)

464

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

465

self.disable_initiator_tag = (gobject.timeout_add

466

(self._timedelta_to_milliseconds(timeout),

467

self.disable))

629

if self.disable_initiator_tag is not None:

630

gobject.source_remove(self.disable_initiator_tag)

631

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

632

self.disable_initiator_tag = (gobject.timeout_add

633

(timedelta_to_milliseconds

634

(timeout), self.disable))

635

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

468

636

469

637

def need_approval(self):

470

638

self.last_approval_request = datetime.datetime.utcnow()

510

678

'replace')))

511

679

for attr in

512

680

self.runtime_expansions)

513

681

514

682

try:

515

683

command = self.checker_command % escaped_attrs

516

684

except TypeError as error:

562

730

raise

563

731

self.checker = None

564

732

733

565

734

def dbus_service_property(dbus_interface, signature="v",

566

735

access="readwrite", byte_arrays=False):

567

736

"""Decorators for marking methods of a DBusObjectWithProperties to

613

782

614

783

class DBusObjectWithProperties(dbus.service.Object):

615

784

"""A D-Bus object with properties.

616

785

617

786

Classes inheriting from this can use the dbus_service_property

618

787

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

619

788

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

626

795

def _get_all_dbus_properties(self):

627

796

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

628

797

"""

629

return ((prop._dbus_name, prop)

798

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

799

for cls in self.__class__.__mro__

630

800

for name, prop in

631

inspect.getmembers(self, self._is_dbus_property))

801

inspect.getmembers(cls, self._is_dbus_property))

632

802

633

803

def _get_dbus_property(self, interface_name, property_name):

634

804

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

635

805

property with the specified name and interface.

636

806

"""

637

for name in (property_name,

638

property_name + "_dbus_property"):

639

prop = getattr(self, name, None)

640

if (prop is None

641

or not self._is_dbus_property(prop)

642

or prop._dbus_name != property_name

643

or (interface_name and prop._dbus_interface

644

and interface_name != prop._dbus_interface)):

645

continue

646

return prop

807

for cls in self.__class__.__mro__:

808

for name, value in (inspect.getmembers

809

(cls, self._is_dbus_property)):

810

if (value._dbus_name == property_name

811

and value._dbus_interface == interface_name):

812

return value.__get__(self)

813

647

814

# No such property

648

815

raise DBusPropertyNotFound(self.dbus_object_path + ":"

649

816

+ interface_name + "."

683

850

def GetAll(self, interface_name):

684

851

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

685

852

standard.

686

853

687

854

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

688

855

"""

689

all = {}

856

properties = {}

690

857

for name, prop in self._get_all_dbus_properties():

691

858

if (interface_name

692

859

and interface_name != prop._dbus_interface):

697

864

continue

698

865

value = prop()

699

866

if not hasattr(value, "variant_level"):

700

all[name] = value

867

properties[name] = value

701

868

continue

702

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

703

value.variant_level+1)

704

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

869

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

870

value.variant_level+1)

871

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

705

872

706

873

@dbus.service.method(dbus.INTROSPECTABLE_IFACE,

707

874

out_signature="s",

751

918

return xmlstring

752

919

753

920

921

def datetime_to_dbus (dt, variant_level=0):

922

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

923

if dt is None:

924

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

925

return dbus.String(dt.isoformat(),

926

variant_level=variant_level)

927

928

929

class AlternateDBusNamesMetaclass(DBusObjectWithProperties

930

.__metaclass__):

931

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

932

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

933

"""

934

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

935

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

936

# methods, signals, or properties in them

937

for base in (b for b in bases

938

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

939

# Go though all attributes of the base class

940

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

941

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

942

# with the wrong interface name

943

if (not hasattr(attribute, "_dbus_interface")

944

or not attribute._dbus_interface

945

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

946

continue

947

# Create an alternate D-Bus interface name based on

948

# the current name

949

alt_interface = (attribute._dbus_interface

950

.replace("se.recompile.Mandos",

951

"se.bsnet.fukt.Mandos"))

952

# Is this a D-Bus signal?

953

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

954

# Extract the original non-method function by

955

# black magic

956

nonmethod_func = (dict(

957

zip(attribute.func_code.co_freevars,

958

attribute.__closure__))["func"]

959

.cell_contents)

960

# Create a new, but exactly alike, function

961

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

962

# with the alternate D-Bus interface name

963

new_function = (dbus.service.signal

964

(alt_interface,

965

attribute._dbus_signature)

966

(types.FunctionType(

967

nonmethod_func.func_code,

968

nonmethod_func.func_globals,

969

nonmethod_func.func_name,

970

nonmethod_func.func_defaults,

971

nonmethod_func.func_closure)))

972

# Define a creator of a function to call both the

973

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

974

# signals gets sent when the function is called

975

def fixscope(func1, func2):

976

"""This function is a scope container to pass

977

func1 and func2 to the "call_both" function

978

outside of its arguments"""

979

def call_both(*args, **kwargs):

980

"""This function will emit two D-Bus

981

signals by calling func1 and func2"""

982

func1(*args, **kwargs)

983

func2(*args, **kwargs)

984

return call_both

985

# Create the "call_both" function and add it to

986

# the class

987

attr[attrname] = fixscope(attribute,

988

new_function)

989

# Is this a D-Bus method?

990

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

991

# Create a new, but exactly alike, function

992

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

993

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

994

# to the class.

995

attr[attrname] = (dbus.service.method

996

(alt_interface,

997

attribute._dbus_in_signature,

998

attribute._dbus_out_signature)

999

(types.FunctionType

1000

(attribute.func_code,

1001

attribute.func_globals,

1002

attribute.func_name,

1003

attribute.func_defaults,

1004

attribute.func_closure)))

1005

# Is this a D-Bus property?

1006

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

1007

# Create a new, but exactly alike, function

1008

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

1009

# property with the alternate D-Bus interface

1010

# name. Add it to the class.

1011

attr[attrname] = (dbus_service_property

1012

(alt_interface,

1013

attribute._dbus_signature,

1014

attribute._dbus_access,

1015

attribute

1016

._dbus_get_args_options

1017

["byte_arrays"])

1018

(types.FunctionType

1019

(attribute.func_code,

1020

attribute.func_globals,

1021

attribute.func_name,

1022

attribute.func_defaults,

1023

attribute.func_closure)))

1024

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

1025

1026

754

1027

class ClientDBus(Client, DBusObjectWithProperties):

755

1028

"""A Client class using D-Bus

756

1029

765

1038

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

766

1039

767

1040

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

768

self._approvals_pending = 0

769

1041

self.bus = bus

770

1042

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

1043

self._approvals_pending = 0

1044

1045

self._approvals_pending = 0

771

1046

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

772

1047

# the D-Bus

773

1048

client_object_name = unicode(self.name).translate(

777

1052

("/clients/" + client_object_name))

778

1053

DBusObjectWithProperties.__init__(self, self.bus,

779

1054

self.dbus_object_path)

780

def _set_expires(self, value):

781

old_value = getattr(self, "_expires", None)

782

self._expires = value

783

if hasattr(self, "dbus_object_path") and old_value != value:

784

dbus_time = (self._datetime_to_dbus(self._expires,

785

variant_level=1))

786

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

787

dbus_time)

788

expires = property(lambda self: self._expires, _set_expires)

789

del _set_expires

790

791

def _get_approvals_pending(self):

792

return self._approvals_pending

793

def _set_approvals_pending(self, value):

794

old_value = self._approvals_pending

795

self._approvals_pending = value

796

bval = bool(value)

797

if (hasattr(self, "dbus_object_path")

798

and bval is not bool(old_value)):

799

dbus_bool = dbus.Boolean(bval, variant_level=1)

800

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

801

dbus_bool)

802

803

approvals_pending = property(_get_approvals_pending,

804

_set_approvals_pending)

805

del _get_approvals_pending, _set_approvals_pending

806

807

@staticmethod

808

def _datetime_to_dbus(dt, variant_level=0):

809

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

810

if dt is None:

811

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

812

return dbus.String(dt.isoformat(),

813

variant_level=variant_level)

814

815

def enable(self):

816

oldstate = getattr(self, "enabled", False)

817

r = Client.enable(self)

818

if oldstate != self.enabled:

819

# Emit D-Bus signals

820

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

821

dbus.Boolean(True, variant_level=1))

822

self.PropertyChanged(

823

dbus.String("LastEnabled"),

824

self._datetime_to_dbus(self.last_enabled,

825

variant_level=1))

826

return r

827

828

def disable(self, quiet = False):

829

oldstate = getattr(self, "enabled", False)

830

r = Client.disable(self, quiet=quiet)

831

if not quiet and oldstate != self.enabled:

832

# Emit D-Bus signal

833

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

834

dbus.Boolean(False, variant_level=1))

835

return r

1055

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

836

1122

837

1123

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

838

1124

try:

847

1133

*args, **kwargs):

848

1134

self.checker_callback_tag = None

849

1135

self.checker = None

850

# Emit D-Bus signal

851

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

852

dbus.Boolean(False, variant_level=1))

853

1136

if os.WIFEXITED(condition):

854

1137

exitstatus = os.WEXITSTATUS(condition)

855

1138

# Emit D-Bus signal

865

1148

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

866

1149

*args, **kwargs)

867

1150

868

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

869

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

870

# Emit D-Bus signal

871

self.PropertyChanged(

872

dbus.String("LastCheckedOK"),

873

(self._datetime_to_dbus(self.last_checked_ok,

874

variant_level=1)))

875

876

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

877

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

878

# Emit D-Bus signal

879

self.PropertyChanged(

880

dbus.String("LastApprovalRequest"),

881

(self._datetime_to_dbus(self.last_approval_request,

882

variant_level=1)))

883

return r

884

885

1151

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

886

1152

old_checker = self.checker

887

1153

if self.checker is not None:

894

1160

and old_checker_pid != self.checker.pid):

895

1161

# Emit D-Bus signal

896

1162

self.CheckerStarted(self.current_checker_command)

897

self.PropertyChanged(

898

dbus.String("CheckerRunning"),

899

dbus.Boolean(True, variant_level=1))

900

1163

return r

901

1164

902

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

903

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

904

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

905

if (old_checker is not None

906

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

907

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

908

dbus.Boolean(False, variant_level=1))

909

return r

910

911

1165

def _reset_approved(self):

912

self._approved = None

1166

self.approved = None

913

1167

return False

914

1168

915

1169

def approve(self, value=True):

916

1170

self.send_changedstate()

917

self._approved = value

918

gobject.timeout_add(self._timedelta_to_milliseconds

1171

self.approved = value

1172

gobject.timeout_add(timedelta_to_milliseconds

919

1173

(self.approval_duration),

920

1174

self._reset_approved)

921

1175

922

1176

923

1177

## D-Bus methods, signals & properties

924

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

1178

_interface = "se.recompile.Mandos.Client"

925

1179

926

1180

## Signals

927

1181

964

1218

"D-Bus signal"

965

1219

return self.need_approval()

966

1220

1221

# NeRwequest - signal

1222

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

1223

def NewRequest(self, ip):

1224

"""D-Bus signal

1225

Is sent after a client request a password.

1226

"""

1227

pass

1228

967

1229

## Methods

968

1230

969

1231

# Approve - method

1012

1274

def ApprovedByDefault_dbus_property(self, value=None):

1013

1275

if value is None: # get

1014

1276

return dbus.Boolean(self.approved_by_default)

1015

old_value = self.approved_by_default

1016

1277

self.approved_by_default = bool(value)

1017

# Emit D-Bus signal

1018

if old_value != self.approved_by_default:

1019

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

1020

dbus.Boolean(value, variant_level=1))

1021

1278

1022

1279

# ApprovalDelay - property

1023

1280

@dbus_service_property(_interface, signature="t",

1025

1282

def ApprovalDelay_dbus_property(self, value=None):

1026

1283

if value is None: # get

1027

1284

return dbus.UInt64(self.approval_delay_milliseconds())

1028

old_value = self.approval_delay

1029

1285

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

1030

# Emit D-Bus signal

1031

if old_value != self.approval_delay:

1032

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

1033

dbus.UInt64(value, variant_level=1))

1034

1286

1035

1287

# ApprovalDuration - property

1036

1288

@dbus_service_property(_interface, signature="t",

1037

1289

access="readwrite")

1038

1290

def ApprovalDuration_dbus_property(self, value=None):

1039

1291

if value is None: # get

1040

return dbus.UInt64(self._timedelta_to_milliseconds(

1292

return dbus.UInt64(timedelta_to_milliseconds(

1041

1293

self.approval_duration))

1042

old_value = self.approval_duration

1043

1294

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

1044

# Emit D-Bus signal

1045

if old_value != self.approval_duration:

1046

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

1047

dbus.UInt64(value, variant_level=1))

1048

1295

1049

1296

# Name - property

1050

1297

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

1062

1309

def Host_dbus_property(self, value=None):

1063

1310

if value is None: # get

1064

1311

return dbus.String(self.host)

1065

old_value = self.host

1066

self.host = value

1067

# Emit D-Bus signal

1068

if old_value != self.host:

1069

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

1070

dbus.String(value, variant_level=1))

1312

self.host = unicode(value)

1071

1313

1072

1314

# Created - property

1073

1315

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

1074

1316

def Created_dbus_property(self):

1075

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

1317

return datetime_to_dbus(self.created)

1076

1318

1077

1319

# LastEnabled - property

1078

1320

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

1079

1321

def LastEnabled_dbus_property(self):

1080

return self._datetime_to_dbus(self.last_enabled)

1322

return datetime_to_dbus(self.last_enabled)

1081

1323

1082

1324

# Enabled - property

1083

1325

@dbus_service_property(_interface, signature="b",

1097

1339

if value is not None:

1098

1340

self.checked_ok()

1099

1341

return

1100

return self._datetime_to_dbus(self.last_checked_ok)

1342

return datetime_to_dbus(self.last_checked_ok)

1101

1343

1102

1344

# Expires - property

1103

1345

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

1104

1346

def Expires_dbus_property(self):

1105

return self._datetime_to_dbus(self.expires)

1347

return datetime_to_dbus(self.expires)

1106

1348

1107

1349

# LastApprovalRequest - property

1108

1350

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

1109

1351

def LastApprovalRequest_dbus_property(self):

1110

return self._datetime_to_dbus(self.last_approval_request)

1352

return datetime_to_dbus(self.last_approval_request)

1111

1353

1112

1354

# Timeout - property

1113

1355

@dbus_service_property(_interface, signature="t",

1115

1357

def Timeout_dbus_property(self, value=None):

1116

1358

if value is None: # get

1117

1359

return dbus.UInt64(self.timeout_milliseconds())

1118

old_value = self.timeout

1119

1360

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

1120

# Emit D-Bus signal

1121

if old_value != self.timeout:

1122

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

1123

dbus.UInt64(value, variant_level=1))

1124

1361

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

1125

1362

return

1126

1363

# Reschedule timeout

1127

1364

gobject.source_remove(self.disable_initiator_tag)

1128

1365

self.disable_initiator_tag = None

1129

1366

self.expires = None

1130

time_to_die = (self.

1131

_timedelta_to_milliseconds((self

1132

.last_checked_ok

1133

+ self.timeout)

1134

- datetime.datetime

1135

.utcnow()))

1367

time_to_die = timedelta_to_milliseconds((self

1368

.last_checked_ok

1369

+ self.timeout)

1370

- datetime.datetime

1371

.utcnow())

1136

1372

if time_to_die <= 0:

1137

1373

# The timeout has passed

1138

1374

self.disable()

1139

1375

else:

1140

1376

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

1141

+ datetime.timedelta(milliseconds = time_to_die))

1377

+ datetime.timedelta(milliseconds =

1378

time_to_die))

1142

1379

self.disable_initiator_tag = (gobject.timeout_add

1143

1380

(time_to_die, self.disable))

1144

1381

1145

1382

# ExtendedTimeout - property

1146

1383

@dbus_service_property(_interface, signature="t",

1147

1384

access="readwrite")

1148

1385

def ExtendedTimeout_dbus_property(self, value=None):

1149

1386

if value is None: # get

1150

1387

return dbus.UInt64(self.extended_timeout_milliseconds())

1151

old_value = self.extended_timeout

1152

1388

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

1153

# Emit D-Bus signal

1154

if old_value != self.extended_timeout:

1155

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

1156

dbus.UInt64(value, variant_level=1))

1157

1389

1158

1390

# Interval - property

1159

1391

@dbus_service_property(_interface, signature="t",

1160

1392

access="readwrite")

1161

1393

def Interval_dbus_property(self, value=None):

1162

1394

if value is None: # get

1163

1395

return dbus.UInt64(self.interval_milliseconds())

1164

old_value = self.interval

1165

1396

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

1166

# Emit D-Bus signal

1167

if old_value != self.interval:

1168

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

1169

dbus.UInt64(value, variant_level=1))

1170

1397

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

1171

1398

return

1172

# Reschedule checker run

1173

gobject.source_remove(self.checker_initiator_tag)

1174

self.checker_initiator_tag = (gobject.timeout_add

1175

(value, self.start_checker))

1176

self.start_checker() # Start one now, too

1177

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

1178

1406

# Checker - property

1179

1407

@dbus_service_property(_interface, signature="s",

1180

1408

access="readwrite")

1181

1409

def Checker_dbus_property(self, value=None):

1182

1410

if value is None: # get

1183

1411

return dbus.String(self.checker_command)

1184

old_value = self.checker_command

1185

self.checker_command = value

1186

# Emit D-Bus signal

1187

if old_value != self.checker_command:

1188

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

1189

dbus.String(self.checker_command,

1190

variant_level=1))

1412

self.checker_command = unicode(value)

1191

1413

1192

1414

# CheckerRunning - property

1193

1415

@dbus_service_property(_interface, signature="b",

1220

1442

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

1221

1443

if not self._pipe.recv():

1222

1444

raise KeyError()

1223

1445

1224

1446

def __getattribute__(self, name):

1225

if(name == '_pipe'):

1447

if name == '_pipe':

1226

1448

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

1227

1449

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

1228

1450

data = self._pipe.recv()

1233

1455

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

1234

1456

return self._pipe.recv()[1]

1235

1457

return func

1236

1458

1237

1459

def __setattr__(self, name, value):

1238

if(name == '_pipe'):

1460

if name == '_pipe':

1239

1461

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

1240

1462

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

1241

1463

1242

1464

1465

class ClientDBusTransitional(ClientDBus):

1466

__metaclass__ = AlternateDBusNamesMetaclass

1467

1468

1243

1469

class ClientHandler(socketserver.BaseRequestHandler, object):

1244

1470

"""A class to handle client connections.

1245

1471

1252

1478

unicode(self.client_address))

1253

1479

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

1254

1480

self.server.child_pipe.fileno())

1255

1481

1256

1482

session = (gnutls.connection

1257

1483

.ClientSession(self.request,

1258

1484

gnutls.connection

1259

1485

.X509Credentials()))

1260

1486

1261

1487

# Note: gnutls.connection.X509Credentials is really a

1262

1488

# generic GnuTLS certificate credentials object so long as

1263

1489

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

1264

1490

# here despite using OpenPGP certificates.

1265

1491

1266

1492

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

1267

1493

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

1268

1494

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

1274

1500

(gnutls.library.functions

1275

1501

.gnutls_priority_set_direct(session._c_object,

1276

1502

priority, None))

1277

1503

1278

1504

# Start communication using the Mandos protocol

1279

1505

# Get protocol number

1280

1506

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

1285

1511

except (ValueError, IndexError, RuntimeError) as error:

1286

1512

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

1287

1513

return

1288

1514

1289

1515

# Start GnuTLS connection

1290

1516

try:

1291

1517

session.handshake()

1295

1521

# established. Just abandon the request.

1296

1522

return

1297

1523

logger.debug("Handshake succeeded")

1298

1524

1299

1525

approval_required = False

1300

1526

try:

1301

1527

try:

1306

1532

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

1307

1533

return

1308

1534

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

1309

1535

1310

1536

try:

1311

1537

client = ProxyClient(child_pipe, fpr,

1312

1538

self.client_address)

1313

1539

except KeyError:

1314

1540

return

1315

1541

1542

if self.server.use_dbus:

1543

# Emit D-Bus signal

1544

client.NewRequest(str(self.client_address))

1545

1316

1546

if client.approval_delay:

1317

1547

delay = client.approval_delay

1318

1548

client.approvals_pending += 1

1324

1554

client.name)

1325

1555

if self.server.use_dbus:

1326

1556

# Emit D-Bus signal

1327

client.Rejected("Disabled")

1557

client.Rejected("Disabled")

1328

1558

return

1329

1559

1330

if client._approved or not client.approval_delay:

1560

if client.approved or not client.approval_delay:

1331

1561

#We are approved or approval is disabled

1332

1562

break

1333

elif client._approved is None:

1563

elif client.approved is None:

1334

1564

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

1335

1565

client.name)

1336

1566

if self.server.use_dbus:

1347

1577

return

1348

1578

1349

1579

#wait until timeout or approved

1350

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

1351

1580

time = datetime.datetime.now()

1352

1581

client.changedstate.acquire()

1353

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

1582

(client.changedstate.wait

1583

(float(client.timedelta_to_milliseconds(delay)

1584

/ 1000)))

1354

1585

client.changedstate.release()

1355

1586

time2 = datetime.datetime.now()

1356

1587

if (time2 - time) >= delay:

1378

1609

sent, len(client.secret)

1379

1610

- (sent_size + sent))

1380

1611

sent_size += sent

1381

1612

1382

1613

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

1383

# bump the timeout as if seen

1614

# bump the timeout using extended_timeout

1384

1615

client.checked_ok(client.extended_timeout)

1385

1616

if self.server.use_dbus:

1386

1617

# Emit D-Bus signal

1454

1685

# Convert the buffer to a Python bytestring

1455

1686

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

1456

1687

# Convert the bytestring to hexadecimal notation

1457

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

1688

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

1458

1689

return hex_fpr

1459

1690

1460

1691

1463

1694

def sub_process_main(self, request, address):

1464

1695

try:

1465

1696

self.finish_request(request, address)

1466

except:

1697

except Exception:

1467

1698

self.handle_error(request, address)

1468

1699

self.close_request(request)

1469

1700

1470

1701

def process_request(self, request, address):

1471

1702

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

1472

multiprocessing.Process(target = self.sub_process_main,

1473

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

1703

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

1704

args = (request,

1705

address))

1706

proc.start()

1707

return proc

1708

1474

1709

1475

1710

class MultiprocessingMixInWithPipe(MultiprocessingMixIn, object):

1476

1711

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

1480

1715

This function creates a new pipe in self.pipe

1481

1716

"""

1482

1717

parent_pipe, self.child_pipe = multiprocessing.Pipe()

1483

1484

super(MultiprocessingMixInWithPipe,

1485

self).process_request(request, client_address)

1718

1719

proc = MultiprocessingMixIn.process_request(self, request,

1720

client_address)

1486

1721

self.child_pipe.close()

1487

self.add_pipe(parent_pipe)

1488

1489

def add_pipe(self, parent_pipe):

1722

self.add_pipe(parent_pipe, proc)

1723

1724

def add_pipe(self, parent_pipe, proc):

1490

1725

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

1491

1726

raise NotImplementedError

1492

1727

1728

1493

1729

class IPv6_TCPServer(MultiprocessingMixInWithPipe,

1494

1730

socketserver.TCPServer, object):

1495

1731

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

1569

1805

self.enabled = False

1570

1806

self.clients = clients

1571

1807

if self.clients is None:

1572

self.clients = set()

1808

self.clients = {}

1573

1809

self.use_dbus = use_dbus

1574

1810

self.gnutls_priority = gnutls_priority

1575

1811

IPv6_TCPServer.__init__(self, server_address,

1579

1815

def server_activate(self):

1580

1816

if self.enabled:

1581

1817

return socketserver.TCPServer.server_activate(self)

1818

1582

1819

def enable(self):

1583

1820

self.enabled = True

1584

def add_pipe(self, parent_pipe):

1821

1822

def add_pipe(self, parent_pipe, proc):

1585

1823

# Call "handle_ipc" for both data and EOF events

1586

1824

gobject.io_add_watch(parent_pipe.fileno(),

1587

1825

gobject.IO_IN | gobject.IO_HUP,

1588

1826

functools.partial(self.handle_ipc,

1589

parent_pipe = parent_pipe))

1590

1827

parent_pipe =

1828

parent_pipe,

1829

proc = proc))

1830

1591

1831

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

1592

client_object=None):

1832

proc = None, client_object=None):

1593

1833

condition_names = {

1594

1834

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

1595

1835

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

1604

1844

for cond, name in

1605

1845

condition_names.iteritems()

1606

1846

if cond & condition)

1607

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

1847

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

1608

1848

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

1849

# Wait for other process to exit

1850

proc.join()

1609

1851

return False

1610

1852

1611

1853

# Read a request from the child

1616

1858

fpr = request[1]

1617

1859

address = request[2]

1618

1860

1619

for c in self.clients:

1861

for c in self.clients.itervalues():

1620

1862

if c.fingerprint == fpr:

1621

1863

client = c

1622

1864

break

1625

1867

"dress: %s", fpr, address)

1626

1868

if self.use_dbus:

1627

1869

# Emit D-Bus signal

1628

mandos_dbus_service.ClientNotFound(fpr, address[0])

1870

mandos_dbus_service.ClientNotFound(fpr,

1871

address[0])

1629

1872

parent_pipe.send(False)

1630

1873

return False

1631

1874

1632

1875

gobject.io_add_watch(parent_pipe.fileno(),

1633

1876

gobject.IO_IN | gobject.IO_HUP,

1634

1877

functools.partial(self.handle_ipc,

1635

parent_pipe = parent_pipe,

1636

client_object = client))

1878

parent_pipe =

1879

parent_pipe,

1880

proc = proc,

1881

client_object =

1882

client))

1637

1883

parent_pipe.send(True)

1638

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

1884

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

1885

# same fileno

1639

1886

return False

1640

1887

if command == 'funcall':

1641

1888

funcname = request[1]

1642

1889

args = request[2]

1643

1890

kwargs = request[3]

1644

1891

1645

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

1646

1892

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

1893

funcname)(*args,

1894

**kwargs)))

1895

1647

1896

if command == 'getattr':

1648

1897

attrname = request[1]

1649

1898

if callable(client_object.__getattribute__(attrname)):

1650

1899

parent_pipe.send(('function',))

1651

1900

else:

1652

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

1901

parent_pipe.send(('data', client_object

1902

.__getattribute__(attrname)))

1653

1903

1654

1904

if command == 'setattr':

1655

1905

attrname = request[1]

1656

1906

value = request[2]

1657

1907

setattr(client_object, attrname, value)

1658

1908

1659

1909

return True

1660

1910

1661

1911

1698

1948

return timevalue

1699

1949

1700

1950

1701

def if_nametoindex(interface):

1702

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

1703

1704

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

1705

global if_nametoindex

1706

try:

1707

if_nametoindex = (ctypes.cdll.LoadLibrary

1708

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

1709

.if_nametoindex)

1710

except (OSError, AttributeError):

1711

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

1712

def if_nametoindex(interface):

1713

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

1714

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

1715

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

1716

ifreq = fcntl.ioctl(s, SIOCGIFINDEX,

1717

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

1718

interface))

1719

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

1720

ifreq[16:20])[0]

1721

return interface_index

1722

return if_nametoindex(interface)

1723

1724

1725

1951

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

1726

1952

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

1727

1953

1782

2008

" system bus interface")

1783

2009

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

1784

2010

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

2011

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

2012

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

2013

" state")

2014

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

2015

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

2016

1785

2017

options = parser.parse_args()

1786

2018

1787

2019

if options.check:

1800

2032

"use_dbus": "True",

1801

2033

"use_ipv6": "True",

1802

2034

"debuglevel": "",

2035

"restore": "True",

2036

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

1803

2037

}

1804

2038

1805

2039

# Parse config file for server-global settings

1822

2056

# options, if set.

1823

2057

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

1824

2058

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

1825

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

2059

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

2060

"statedir"):

1826

2061

value = getattr(options, option)

1827

2062

if value is not None:

1828

2063

server_settings[option] = value

1840

2075

debuglevel = server_settings["debuglevel"]

1841

2076

use_dbus = server_settings["use_dbus"]

1842

2077

use_ipv6 = server_settings["use_ipv6"]

1843

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

1844

2090

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

1845

2091

syslogger.setFormatter(logging.Formatter

1846

2092

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

1848

2094

% server_settings["servicename"]))

1849

2095

1850

2096

# Parse config file with clients

1851

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

1852

"extended_timeout": "15m",

1853

"interval": "2m",

1854

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

1855

"host": "",

1856

"approval_delay": "0s",

1857

"approval_duration": "1s",

1858

}

1859

client_config = configparser.SafeConfigParser(client_defaults)

2097

client_config = configparser.SafeConfigParser(Client.client_defaults)

1860

2098

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

1861

2099

"clients.conf"))

1862

2100

1900

2138

if error[0] != errno.EPERM:

1901

2139

raise error

1902

2140

1903

if not debug and not debuglevel:

1904

syslogger.setLevel(logging.WARNING)

1905

console.setLevel(logging.WARNING)

1906

if debuglevel:

1907

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

1908

syslogger.setLevel(level)

1909

console.setLevel(level)

1910

1911

2141

if debug:

1912

2142

# Enable all possible GnuTLS debugging

1913

2143

1927

2157

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

1928

2158

if null > 2:

1929

2159

os.close(null)

1930

else:

1931

# No console logging

1932

logger.removeHandler(console)

1933

2160

1934

2161

# Need to fork before connecting to D-Bus

1935

2162

if not debug:

1936

2163

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

1937

2164

daemon()

1938

2165

2166

gobject.threads_init()

2167

1939

2168

global main_loop

1940

2169

# From the Avahi example code

1941

2170

DBusGMainLoop(set_as_default=True )

1944

2173

# End of Avahi example code

1945

2174

if use_dbus:

1946

2175

try:

1947

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

2176

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

1948

2177

bus, do_not_queue=True)

2178

old_bus_name = (dbus.service.BusName

2179

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

2180

do_not_queue=True))

1949

2181

except dbus.exceptions.NameExistsException as e:

1950

2182

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

1951

2183

use_dbus = False

1952

2184

server_settings["use_dbus"] = False

1953

2185

tcp_server.use_dbus = False

1954

2186

protocol = avahi.PROTO_INET6 if use_ipv6 else avahi.PROTO_INET

1955

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

1956

servicetype = "_mandos._tcp",

1957

protocol = protocol, bus = bus)

2187

service = AvahiServiceToSyslog(name =

2188

server_settings["servicename"],

2189

servicetype = "_mandos._tcp",

2190

protocol = protocol, bus = bus)

1958

2191

if server_settings["interface"]:

1959

2192

service.interface = (if_nametoindex

1960

2193

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

1964

2197

1965

2198

client_class = Client

1966

2199

if use_dbus:

1967

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

1968

def client_config_items(config, section):

1969

special_settings = {

1970

"approved_by_default":

1971

lambda: config.getboolean(section,

1972

"approved_by_default"),

1973

}

1974

for name, value in config.items(section):

2200

client_class = functools.partial(ClientDBusTransitional,

2201

bus = bus)

2202

2203

client_settings = Client.config_parser(client_config)

2204

old_client_settings = {}

2205

clients_data = {}

2206

2207

# Get client data and settings from last running state.

2208

if server_settings["restore"]:

2209

try:

2210

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

2211

clients_data, old_client_settings = (pickle.load

2212

(stored_state))

2213

os.remove(stored_state_path)

2214

except IOError as e:

2215

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

2216

.format(e))

2217

if e.errno != errno.ENOENT:

2218

raise

2219

except EOFError as e:

2220

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

2221

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

2222

2223

with PGPEngine() as pgp:

2224

for client_name, client in clients_data.iteritems():

2225

# Decide which value to use after restoring saved state.

2226

# We have three different values: Old config file,

2227

# new config file, and saved state.

2228

# New config value takes precedence if it differs from old

2229

# config value, otherwise use saved state.

2230

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

2231

try:

2232

# For each value in new config, check if it

2233

# differs from the old config value (Except for

2234

# the "secret" attribute)

2235

if (name != "secret" and

2236

value != old_client_settings[client_name]

2237

[name]):

2238

client[name] = value

2239

except KeyError:

2240

pass

2241

2242

# Clients who has passed its expire date can still be

2243

# enabled if its last checker was successful. Clients

2244

# whose checker failed before we stored its state is

2245

# assumed to have failed all checkers during downtime.

2246

if client["enabled"]:

2247

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

2248

if not client["last_checked_ok"]:

2249

logger.warning(

2250

"disabling client {0} - Client never "

2251

"performed a successfull checker"

2252

.format(client["name"]))

2253

client["enabled"] = False

2254

elif client["last_checker_status"] != 0:

2255

logger.warning(

2256

"disabling client {0} - Client "

2257

"last checker failed with error code {1}"

2258

.format(client["name"],

2259

client["last_checker_status"]))

2260

client["enabled"] = False

2261

else:

2262

client["expires"] = (datetime.datetime

2263

.utcnow()

2264

+ client["timeout"])

2265

1975

2266

try:

1976

yield (name, special_settings[name]())

1977

except KeyError:

1978

yield (name, value)

1979

1980

tcp_server.clients.update(set(

1981

client_class(name = section,

1982

config= dict(client_config_items(

1983

client_config, section)))

1984

for section in client_config.sections()))

2267

client["secret"] = (

2268

pgp.decrypt(client["encrypted_secret"],

2269

client_settings[client_name]

2270

["secret"]))

2271

except PGPError:

2272

# If decryption fails, we use secret from new settings

2273

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

2274

.format(client_name))

2275

client["secret"] = (

2276

client_settings[client_name]["secret"])

2277

2278

2279

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

2280

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

2281

del clients_data[client_name]

2282

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

2283

clients_data[client_name] = client_settings[client_name]

2284

2285

# Create clients all clients

2286

for client_name, client in clients_data.iteritems():

2287

tcp_server.clients[client_name] = client_class(

2288

name = client_name, settings = client)

2289

1985

2290

if not tcp_server.clients:

1986

2291

logger.warning("No clients defined")

1987

2292

1998

2303

# "pidfile" was never created

1999

2304

pass

2000

2305

del pidfilename

2001

2002

2306

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

2003

2307

2004

2308

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

2005

2309

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

2006

2310

2009

2313

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

2010

2314

def __init__(self):

2011

2315

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

2012

_interface = "se.bsnet.fukt.Mandos"

2316

_interface = "se.recompile.Mandos"

2013

2317

2014

2318

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

2015

2319

def ClientAdded(self, objpath):

2030

2334

def GetAllClients(self):

2031

2335

"D-Bus method"

2032

2336

return dbus.Array(c.dbus_object_path

2033

for c in tcp_server.clients)

2337

for c in

2338

tcp_server.clients.itervalues())

2034

2339

2035

2340

@dbus.service.method(_interface,

2036

2341

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

2038

2343

"D-Bus method"

2039

2344

return dbus.Dictionary(

2040

2345

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

2041

for c in tcp_server.clients),

2346

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

2042

2347

signature="oa{sv}")

2043

2348

2044

2349

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

2045

2350

def RemoveClient(self, object_path):

2046

2351

"D-Bus method"

2047

for c in tcp_server.clients:

2352

for c in tcp_server.clients.itervalues():

2048

2353

if c.dbus_object_path == object_path:

2049

tcp_server.clients.remove(c)

2354

del tcp_server.clients[c.name]

2050

2355

c.remove_from_connection()

2051

2356

# Don't signal anything except ClientRemoved

2052

2357

c.disable(quiet=True)

2057

2362

2058

2363

del _interface

2059

2364

2060

mandos_dbus_service = MandosDBusService()

2365

class MandosDBusServiceTransitional(MandosDBusService):

2366

__metaclass__ = AlternateDBusNamesMetaclass

2367

mandos_dbus_service = MandosDBusServiceTransitional()

2061

2368

2062

2369

def cleanup():

2063

2370

"Cleanup function; run on exit"

2064

2371

service.cleanup()

2065

2372

2373

multiprocessing.active_children()

2374

if not (tcp_server.clients or client_settings):

2375

return

2376

2377

# Store client before exiting. Secrets are encrypted with key

2378

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

2379

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

2380

clients = {}

2381

with PGPEngine() as pgp:

2382

for client in tcp_server.clients.itervalues():

2383

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

2384

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

2385

key)

2386

client_dict = {}

2387

2388

# A list of attributes that can not be pickled

2389

# + secret.

2390

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

2391

"checker"))

2392

for name, typ in (inspect.getmembers

2393

(dbus.service.Object)):

2394

exclude.add(name)

2395

2396

client_dict["encrypted_secret"] = (client

2397

.encrypted_secret)

2398

for attr in client.client_structure:

2399

if attr not in exclude:

2400

client_dict[attr] = getattr(client, attr)

2401

2402

clients[client.name] = client_dict

2403

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

2404

2405

try:

2406

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

2407

prefix="clients-",

2408

dir=os.path.dirname

2409

(stored_state_path))

2410

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

2411

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

2412

os.rename(tempname, stored_state_path)

2413

except (IOError, OSError) as e:

2414

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

2415

.format(e))

2416

if not debug:

2417

try:

2418

os.remove(tempname)

2419

except NameError:

2420

pass

2421

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

2422

errno.EEXIST)):

2423

raise e

2424

2425

# Delete all clients, and settings from config

2066

2426

while tcp_server.clients:

2067

client = tcp_server.clients.pop()

2427

name, client = tcp_server.clients.popitem()

2068

2428

if use_dbus:

2069

2429

client.remove_from_connection()

2070

client.disable_hook = None

2071

2430

# Don't signal anything except ClientRemoved

2072

2431

client.disable(quiet=True)

2073

2432

if use_dbus:

2074

2433

# Emit D-Bus signal

2075

mandos_dbus_service.ClientRemoved(client.dbus_object_path,

2434

mandos_dbus_service.ClientRemoved(client

2435

.dbus_object_path,

2076

2436

client.name)

2437

client_settings.clear()

2077

2438

2078

2439

atexit.register(cleanup)

2079

2440

2080

for client in tcp_server.clients:

2441

for client in tcp_server.clients.itervalues():

2081

2442

if use_dbus:

2082

2443

# Emit D-Bus signal

2083

2444

mandos_dbus_service.ClientAdded(client.dbus_object_path)

2084

client.enable()

2445

# Need to initiate checking of clients

2446

if client.enabled:

2447

client.init_checker()

2085

2448

2086

2449

tcp_server.enable()

2087

2450

tcp_server.server_activate()