/mandos/release : revision 237.17.8

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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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68

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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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87

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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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112

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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)

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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:

202

decrypted_plaintext = f.read()

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proc.wait()

204

except IOError as e:

205

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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268

self.rename_count)

161

269

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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275

try:

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276

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(

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'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()

225

330

except (dbus.exceptions.UnknownMethodException,

226

dbus.exceptions.DBusException) as e:

331

dbus.exceptions.DBusException):

227

332

pass

228

333

self.group = None

229

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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370

371

class AvahiServiceToSyslog(AvahiService):

372

def rename(self):

373

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

374

ret = AvahiService.rename(self)

375

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

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380

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def _timedelta_to_milliseconds(td):

381

def timedelta_to_milliseconds(td):

268

382

"Convert a datetime.timedelta() to milliseconds"

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383

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

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384

+ (td.seconds * 1000)

274

388

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

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389

276

390

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

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403

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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406

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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408

enabled: bool()

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

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412

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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414

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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420

D-Bus identifiers

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

313

431

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

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

315

433

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

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434

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",

443

}

444

317

445

def timeout_milliseconds(self):

318

446

"Return the 'timeout' attribute in milliseconds"

319

return _timedelta_to_milliseconds(self.timeout)

320

447

return timedelta_to_milliseconds(self.timeout)

448

321

449

def extended_timeout_milliseconds(self):

322

450

"Return the 'extended_timeout' attribute in milliseconds"

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return _timedelta_to_milliseconds(self.extended_timeout)

451

return timedelta_to_milliseconds(self.extended_timeout)

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452

325

453

def interval_milliseconds(self):

326

454

"Return the 'interval' attribute in milliseconds"

327

return _timedelta_to_milliseconds(self.interval)

328

455

return timedelta_to_milliseconds(self.interval)

456

329

457

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):

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):

333

512

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

334

513

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

335

514

attribute."""

336

515

self.name = name

337

if config is None:

338

config = {}

516

# adding all client settings

517

for setting, value in settings.iteritems():

518

setattr(self, setting, value)

519

339

520

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

340

521

# Uppercase and remove spaces from fingerprint for later

341

522

# comparison purposes with return value from the fingerprint()

342

523

# function

343

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

344

.replace(" ", ""))

345

524

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

525

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

526

527

# attributes specific for this server instance

366

528

self.checker = None

367

529

self.checker_initiator_tag = None

368

530

self.disable_initiator_tag = None

369

self.expires = None

370

531

self.checker_callback_tag = None

371

self.checker_command = config["checker"]

372

532

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)

533

self.approved = None

377

534

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())

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)

383

549

550

# Send notice to process children that client state has changed

384

551

def send_changedstate(self):

385

self.changedstate.acquire()

386

self.changedstate.notify_all()

387

self.changedstate.release()

388

552

with self.changedstate:

553

self.changedstate.notify_all()

554

389

555

def enable(self):

390

556

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

391

557

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

392

558

# Already enabled

393

559

return

394

560

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

561

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

402

self.disable_initiator_tag = (gobject.timeout_add

403

(self.timeout_milliseconds(),

404

self.disable))

405

562

self.enabled = True

406

563

self.last_enabled = datetime.datetime.utcnow()

407

# Also start a new checker *right now*.

408

self.start_checker()

564

self.init_checker()

409

565

410

566

def disable(self, quiet=True):

411

567

"""Disable this client."""

423

579

gobject.source_remove(self.checker_initiator_tag)

424

580

self.checker_initiator_tag = None

425

581

self.stop_checker()

426

if self.disable_hook:

427

self.disable_hook(self)

428

582

self.enabled = False

429

583

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

430

584

return False

431

585

432

586

def __del__(self):

433

self.disable_hook = None

434

587

self.disable()

435

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

436

602

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

437

603

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

438

604

self.checker_callback_tag = None

439

605

self.checker = None

440

606

if os.WIFEXITED(condition):

441

exitstatus = os.WEXITSTATUS(condition)

442

if exitstatus == 0:

607

self.last_checker_status = os.WEXITSTATUS(condition)

608

if self.last_checker_status == 0:

443

609

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

444

610

vars(self))

445

611

self.checked_ok()

447

613

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

448

614

vars(self))

449

615

else:

616

self.last_checker_status = -1

450

617

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

451

618

vars(self))

452

619

459

626

if timeout is None:

460

627

timeout = self.timeout

461

628

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))

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

467

636

468

637

def need_approval(self):

469

638

self.last_approval_request = datetime.datetime.utcnow()

509

678

'replace')))

510

679

for attr in

511

680

self.runtime_expansions)

512

681

513

682

try:

514

683

command = self.checker_command % escaped_attrs

515

684

except TypeError as error:

561

730

raise

562

731

self.checker = None

563

732

733

564

734

def dbus_service_property(dbus_interface, signature="v",

565

735

access="readwrite", byte_arrays=False):

566

736

"""Decorators for marking methods of a DBusObjectWithProperties to

612

782

613

783

class DBusObjectWithProperties(dbus.service.Object):

614

784

"""A D-Bus object with properties.

615

785

616

786

Classes inheriting from this can use the dbus_service_property

617

787

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

618

788

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

625

795

def _get_all_dbus_properties(self):

626

796

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

627

797

"""

628

return ((prop._dbus_name, prop)

798

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

799

for cls in self.__class__.__mro__

629

800

for name, prop in

630

inspect.getmembers(self, self._is_dbus_property))

801

inspect.getmembers(cls, self._is_dbus_property))

631

802

632

803

def _get_dbus_property(self, interface_name, property_name):

633

804

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

634

805

property with the specified name and interface.

635

806

"""

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

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

646

814

# No such property

647

815

raise DBusPropertyNotFound(self.dbus_object_path + ":"

648

816

+ interface_name + "."

682

850

def GetAll(self, interface_name):

683

851

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

684

852

standard.

685

853

686

854

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

687

855

"""

688

all = {}

856

properties = {}

689

857

for name, prop in self._get_all_dbus_properties():

690

858

if (interface_name

691

859

and interface_name != prop._dbus_interface):

696

864

continue

697

865

value = prop()

698

866

if not hasattr(value, "variant_level"):

699

all[name] = value

867

properties[name] = value

700

868

continue

701

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

702

value.variant_level+1)

703

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")

704

872

705

873

@dbus.service.method(dbus.INTROSPECTABLE_IFACE,

706

874

out_signature="s",

757

925

return dbus.String(dt.isoformat(),

758

926

variant_level=variant_level)

759

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

760

1027

class ClientDBus(Client, DBusObjectWithProperties):

761

1028

"""A Client class using D-Bus

762

1029

771

1038

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

772

1039

773

1040

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

774

self._approvals_pending = 0

775

1041

self.bus = bus

776

1042

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

1043

self._approvals_pending = 0

1044

1045

self._approvals_pending = 0

777

1046

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

778

1047

# the D-Bus

779

1048

client_object_name = unicode(self.name).translate(

787

1056

def notifychangeproperty(transform_func,

788

1057

dbus_name, type_func=lambda x: x,

789

1058

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

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

795

1065

type_func: Function that transform the value before sending it

796

to DBus

797

variant_level: DBus variant level. default: 1

1066

to the D-Bus. Default: no transform

1067

variant_level: D-Bus variant level. Default: 1

798

1068

"""

799

real_value = [None,]

1069

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

800

1070

def setter(self, value):

801

old_value = real_value[0]

802

real_value[0] = value

803

1071

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)

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)

807

1078

self.PropertyChanged(dbus.String(dbus_name),

808

1079

dbus_value)

809

810

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

811

812

1080

setattr(self, attrname, value)

1081

1082

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

1083

1084

813

1085

expires = notifychangeproperty(datetime_to_dbus, "Expires")

814

1086

approvals_pending = notifychangeproperty(dbus.Boolean,

815

1087

"ApprovalPending",

818

1090

last_enabled = notifychangeproperty(datetime_to_dbus,

819

1091

"LastEnabled")

820

1092

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

821

type_func = lambda checker: checker is not None)

1093

type_func = lambda checker:

1094

checker is not None)

822

1095

last_checked_ok = notifychangeproperty(datetime_to_dbus,

823

1096

"LastCheckedOK")

824

last_approval_request = notifychangeproperty(datetime_to_dbus,

825

"LastApprovalRequest")

1097

last_approval_request = notifychangeproperty(

1098

datetime_to_dbus, "LastApprovalRequest")

826

1099

approved_by_default = notifychangeproperty(dbus.Boolean,

827

1100

"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)

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)

832

1108

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)

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)

839

1119

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

840

1120

841

1121

del notifychangeproperty

867

1147

868

1148

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

869

1149

*args, **kwargs)

870

1150

871

1151

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

872

1152

old_checker = self.checker

873

1153

if self.checker is not None:

883

1163

return r

884

1164

885

1165

def _reset_approved(self):

886

self._approved = None

1166

self.approved = None

887

1167

return False

888

1168

889

1169

def approve(self, value=True):

890

1170

self.send_changedstate()

891

self._approved = value

892

gobject.timeout_add(_timedelta_to_milliseconds

1171

self.approved = value

1172

gobject.timeout_add(timedelta_to_milliseconds

893

1173

(self.approval_duration),

894

1174

self._reset_approved)

895

1175

896

1176

897

1177

## D-Bus methods, signals & properties

898

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

1178

_interface = "se.recompile.Mandos.Client"

899

1179

900

1180

## Signals

901

1181

938

1218

"D-Bus signal"

939

1219

return self.need_approval()

940

1220

1221

# NeRwequest - signal

1222

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

1223

def NewRequest(self, ip):

1224

"""D-Bus signal

1225

Is sent after a client request a password.

1226

"""

1227

pass

1228

941

1229

## Methods

942

1230

943

1231

# Approve - method

1001

1289

access="readwrite")

1002

1290

def ApprovalDuration_dbus_property(self, value=None):

1003

1291

if value is None: # get

1004

return dbus.UInt64(_timedelta_to_milliseconds(

1292

return dbus.UInt64(timedelta_to_milliseconds(

1005

1293

self.approval_duration))

1006

1294

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

1007

1295

1021

1309

def Host_dbus_property(self, value=None):

1022

1310

if value is None: # get

1023

1311

return dbus.String(self.host)

1024

self.host = value

1312

self.host = unicode(value)

1025

1313

1026

1314

# Created - property

1027

1315

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

1028

1316

def Created_dbus_property(self):

1029

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

1317

return datetime_to_dbus(self.created)

1030

1318

1031

1319

# LastEnabled - property

1032

1320

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

1076

1364

gobject.source_remove(self.disable_initiator_tag)

1077

1365

self.disable_initiator_tag = None

1078

1366

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()))

1367

time_to_die = timedelta_to_milliseconds((self

1368

.last_checked_ok

1369

+ self.timeout)

1370

- datetime.datetime

1371

.utcnow())

1085

1372

if time_to_die <= 0:

1086

1373

# The timeout has passed

1087

1374

self.disable()

1088

1375

else:

1089

1376

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

1090

+ datetime.timedelta(milliseconds = time_to_die))

1377

+ datetime.timedelta(milliseconds =

1378

time_to_die))

1091

1379

self.disable_initiator_tag = (gobject.timeout_add

1092

1380

(time_to_die, self.disable))

1093

1381

1094

1382

# ExtendedTimeout - property

1095

1383

@dbus_service_property(_interface, signature="t",

1096

1384

access="readwrite")

1098

1386

if value is None: # get

1099

1387

return dbus.UInt64(self.extended_timeout_milliseconds())

1100

1388

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

1101

1389

1102

1390

# Interval - property

1103

1391

@dbus_service_property(_interface, signature="t",

1104

1392

access="readwrite")

1108

1396

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

1109

1397

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

1110

1398

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

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

1117

1406

# Checker - property

1118

1407

@dbus_service_property(_interface, signature="s",

1119

1408

access="readwrite")

1120

1409

def Checker_dbus_property(self, value=None):

1121

1410

if value is None: # get

1122

1411

return dbus.String(self.checker_command)

1123

self.checker_command = value

1412

self.checker_command = unicode(value)

1124

1413

1125

1414

# CheckerRunning - property

1126

1415

@dbus_service_property(_interface, signature="b",

1153

1442

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

1154

1443

if not self._pipe.recv():

1155

1444

raise KeyError()

1156

1445

1157

1446

def __getattribute__(self, name):

1158

if(name == '_pipe'):

1447

if name == '_pipe':

1159

1448

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

1160

1449

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

1161

1450

data = self._pipe.recv()

1166

1455

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

1167

1456

return self._pipe.recv()[1]

1168

1457

return func

1169

1458

1170

1459

def __setattr__(self, name, value):

1171

if(name == '_pipe'):

1460

if name == '_pipe':

1172

1461

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

1173

1462

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

1174

1463

1175

1464

1465

class ClientDBusTransitional(ClientDBus):

1466

__metaclass__ = AlternateDBusNamesMetaclass

1467

1468

1176

1469

class ClientHandler(socketserver.BaseRequestHandler, object):

1177

1470

"""A class to handle client connections.

1178

1471

1185

1478

unicode(self.client_address))

1186

1479

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

1187

1480

self.server.child_pipe.fileno())

1188

1481

1189

1482

session = (gnutls.connection

1190

1483

.ClientSession(self.request,

1191

1484

gnutls.connection

1192

1485

.X509Credentials()))

1193

1486

1194

1487

# Note: gnutls.connection.X509Credentials is really a

1195

1488

# generic GnuTLS certificate credentials object so long as

1196

1489

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

1197

1490

# here despite using OpenPGP certificates.

1198

1491

1199

1492

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

1200

1493

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

1201

1494

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

1207

1500

(gnutls.library.functions

1208

1501

.gnutls_priority_set_direct(session._c_object,

1209

1502

priority, None))

1210

1503

1211

1504

# Start communication using the Mandos protocol

1212

1505

# Get protocol number

1213

1506

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

1218

1511

except (ValueError, IndexError, RuntimeError) as error:

1219

1512

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

1220

1513

return

1221

1514

1222

1515

# Start GnuTLS connection

1223

1516

try:

1224

1517

session.handshake()

1228

1521

# established. Just abandon the request.

1229

1522

return

1230

1523

logger.debug("Handshake succeeded")

1231

1524

1232

1525

approval_required = False

1233

1526

try:

1234

1527

try:

1239

1532

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

1240

1533

return

1241

1534

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

1242

1535

1243

1536

try:

1244

1537

client = ProxyClient(child_pipe, fpr,

1245

1538

self.client_address)

1246

1539

except KeyError:

1247

1540

return

1248

1541

1542

if self.server.use_dbus:

1543

# Emit D-Bus signal

1544

client.NewRequest(str(self.client_address))

1545

1249

1546

if client.approval_delay:

1250

1547

delay = client.approval_delay

1251

1548

client.approvals_pending += 1

1257

1554

client.name)

1258

1555

if self.server.use_dbus:

1259

1556

# Emit D-Bus signal

1260

client.Rejected("Disabled")

1557

client.Rejected("Disabled")

1261

1558

return

1262

1559

1263

if client._approved or not client.approval_delay:

1560

if client.approved or not client.approval_delay:

1264

1561

#We are approved or approval is disabled

1265

1562

break

1266

elif client._approved is None:

1563

elif client.approved is None:

1267

1564

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

1268

1565

client.name)

1269

1566

if self.server.use_dbus:

1280

1577

return

1281

1578

1282

1579

#wait until timeout or approved

1283

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

1284

1580

time = datetime.datetime.now()

1285

1581

client.changedstate.acquire()

1286

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

1582

(client.changedstate.wait

1583

(float(client.timedelta_to_milliseconds(delay)

1584

/ 1000)))

1287

1585

client.changedstate.release()

1288

1586

time2 = datetime.datetime.now()

1289

1587

if (time2 - time) >= delay:

1311

1609

sent, len(client.secret)

1312

1610

- (sent_size + sent))

1313

1611

sent_size += sent

1314

1612

1315

1613

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

1316

# bump the timeout as if seen

1614

# bump the timeout using extended_timeout

1317

1615

client.checked_ok(client.extended_timeout)

1318

1616

if self.server.use_dbus:

1319

1617

# Emit D-Bus signal

1387

1685

# Convert the buffer to a Python bytestring

1388

1686

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

1389

1687

# Convert the bytestring to hexadecimal notation

1390

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

1688

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

1391

1689

return hex_fpr

1392

1690

1393

1691

1396

1694

def sub_process_main(self, request, address):

1397

1695

try:

1398

1696

self.finish_request(request, address)

1399

except:

1697

except Exception:

1400

1698

self.handle_error(request, address)

1401

1699

self.close_request(request)

1402

1700

1403

1701

def process_request(self, request, address):

1404

1702

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

1405

multiprocessing.Process(target = self.sub_process_main,

1406

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

1407

1709

1408

1710

class MultiprocessingMixInWithPipe(MultiprocessingMixIn, object):

1409

1711

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

1413

1715

This function creates a new pipe in self.pipe

1414

1716

"""

1415

1717

parent_pipe, self.child_pipe = multiprocessing.Pipe()

1416

1417

super(MultiprocessingMixInWithPipe,

1418

self).process_request(request, client_address)

1718

1719

proc = MultiprocessingMixIn.process_request(self, request,

1720

client_address)

1419

1721

self.child_pipe.close()

1420

self.add_pipe(parent_pipe)

1421

1422

def add_pipe(self, parent_pipe):

1722

self.add_pipe(parent_pipe, proc)

1723

1724

def add_pipe(self, parent_pipe, proc):

1423

1725

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

1424

1726

raise NotImplementedError

1425

1727

1728

1426

1729

class IPv6_TCPServer(MultiprocessingMixInWithPipe,

1427

1730

socketserver.TCPServer, object):

1428

1731

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

1502

1805

self.enabled = False

1503

1806

self.clients = clients

1504

1807

if self.clients is None:

1505

self.clients = set()

1808

self.clients = {}

1506

1809

self.use_dbus = use_dbus

1507

1810

self.gnutls_priority = gnutls_priority

1508

1811

IPv6_TCPServer.__init__(self, server_address,

1512

1815

def server_activate(self):

1513

1816

if self.enabled:

1514

1817

return socketserver.TCPServer.server_activate(self)

1818

1515

1819

def enable(self):

1516

1820

self.enabled = True

1517

def add_pipe(self, parent_pipe):

1821

1822

def add_pipe(self, parent_pipe, proc):

1518

1823

# Call "handle_ipc" for both data and EOF events

1519

1824

gobject.io_add_watch(parent_pipe.fileno(),

1520

1825

gobject.IO_IN | gobject.IO_HUP,

1521

1826

functools.partial(self.handle_ipc,

1522

parent_pipe = parent_pipe))

1523

1827

parent_pipe =

1828

parent_pipe,

1829

proc = proc))

1830

1524

1831

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

1525

client_object=None):

1832

proc = None, client_object=None):

1526

1833

condition_names = {

1527

1834

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

1528

1835

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

1537

1844

for cond, name in

1538

1845

condition_names.iteritems()

1539

1846

if cond & condition)

1540

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

1847

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

1541

1848

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

1849

# Wait for other process to exit

1850

proc.join()

1542

1851

return False

1543

1852

1544

1853

# Read a request from the child

1549

1858

fpr = request[1]

1550

1859

address = request[2]

1551

1860

1552

for c in self.clients:

1861

for c in self.clients.itervalues():

1553

1862

if c.fingerprint == fpr:

1554

1863

client = c

1555

1864

break

1558

1867

"dress: %s", fpr, address)

1559

1868

if self.use_dbus:

1560

1869

# Emit D-Bus signal

1561

mandos_dbus_service.ClientNotFound(fpr, address[0])

1870

mandos_dbus_service.ClientNotFound(fpr,

1871

address[0])

1562

1872

parent_pipe.send(False)

1563

1873

return False

1564

1874

1565

1875

gobject.io_add_watch(parent_pipe.fileno(),

1566

1876

gobject.IO_IN | gobject.IO_HUP,

1567

1877

functools.partial(self.handle_ipc,

1568

parent_pipe = parent_pipe,

1569

client_object = client))

1878

parent_pipe =

1879

parent_pipe,

1880

proc = proc,

1881

client_object =

1882

client))

1570

1883

parent_pipe.send(True)

1571

# 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

1572

1886

return False

1573

1887

if command == 'funcall':

1574

1888

funcname = request[1]

1575

1889

args = request[2]

1576

1890

kwargs = request[3]

1577

1891

1578

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

1579

1892

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

1893

funcname)(*args,

1894

**kwargs)))

1895

1580

1896

if command == 'getattr':

1581

1897

attrname = request[1]

1582

1898

if callable(client_object.__getattribute__(attrname)):

1583

1899

parent_pipe.send(('function',))

1584

1900

else:

1585

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

1901

parent_pipe.send(('data', client_object

1902

.__getattribute__(attrname)))

1586

1903

1587

1904

if command == 'setattr':

1588

1905

attrname = request[1]

1589

1906

value = request[2]

1590

1907

setattr(client_object, attrname, value)

1591

1908

1592

1909

return True

1593

1910

1594

1911

1631

1948

return timevalue

1632

1949

1633

1950

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

1951

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

1659

1952

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

1660

1953

1715

2008

" system bus interface")

1716

2009

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

1717

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

1718

2017

options = parser.parse_args()

1719

2018

1720

2019

if options.check:

1733

2032

"use_dbus": "True",

1734

2033

"use_ipv6": "True",

1735

2034

"debuglevel": "",

2035

"restore": "True",

2036

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

1736

2037

}

1737

2038

1738

2039

# Parse config file for server-global settings

1755

2056

# options, if set.

1756

2057

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

1757

2058

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

1758

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

2059

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

2060

"statedir"):

1759

2061

value = getattr(options, option)

1760

2062

if value is not None:

1761

2063

server_settings[option] = value

1773

2075

debuglevel = server_settings["debuglevel"]

1774

2076

use_dbus = server_settings["use_dbus"]

1775

2077

use_ipv6 = server_settings["use_ipv6"]

1776

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

1777

2090

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

1778

2091

syslogger.setFormatter(logging.Formatter

1779

2092

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

1781

2094

% server_settings["servicename"]))

1782

2095

1783

2096

# 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)

2097

client_config = configparser.SafeConfigParser(Client.client_defaults)

1793

2098

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

1794

2099

"clients.conf"))

1795

2100

1833

2138

if error[0] != errno.EPERM:

1834

2139

raise error

1835

2140

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

2141

if debug:

1845

2142

# Enable all possible GnuTLS debugging

1846

2143

1860

2157

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

1861

2158

if null > 2:

1862

2159

os.close(null)

1863

else:

1864

# No console logging

1865

logger.removeHandler(console)

1866

2160

1867

2161

# Need to fork before connecting to D-Bus

1868

2162

if not debug:

1869

2163

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

1870

2164

daemon()

1871

2165

2166

gobject.threads_init()

2167

1872

2168

global main_loop

1873

2169

# From the Avahi example code

1874

2170

DBusGMainLoop(set_as_default=True )

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

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

1908

2266

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()))

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

1918

2290

if not tcp_server.clients:

1919

2291

logger.warning("No clients defined")

1920

2292

1931

2303

# "pidfile" was never created

1932

2304

pass

1933

2305

del pidfilename

1934

1935

2306

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

1936

2307

1937

2308

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

1938

2309

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

1939

2310

1942

2313

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

1943

2314

def __init__(self):

1944

2315

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

1945

_interface = "se.bsnet.fukt.Mandos"

2316

_interface = "se.recompile.Mandos"

1946

2317

1947

2318

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

1948

2319

def ClientAdded(self, objpath):

1963

2334

def GetAllClients(self):

1964

2335

"D-Bus method"

1965

2336

return dbus.Array(c.dbus_object_path

1966

for c in tcp_server.clients)

2337

for c in

2338

tcp_server.clients.itervalues())

1967

2339

1968

2340

@dbus.service.method(_interface,

1969

2341

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

1971

2343

"D-Bus method"

1972

2344

return dbus.Dictionary(

1973

2345

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

1974

for c in tcp_server.clients),

2346

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

1975

2347

signature="oa{sv}")

1976

2348

1977

2349

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

1978

2350

def RemoveClient(self, object_path):

1979

2351

"D-Bus method"

1980

for c in tcp_server.clients:

2352

for c in tcp_server.clients.itervalues():

1981

2353

if c.dbus_object_path == object_path:

1982

tcp_server.clients.remove(c)

2354

del tcp_server.clients[c.name]

1983

2355

c.remove_from_connection()

1984

2356

# Don't signal anything except ClientRemoved

1985

2357

c.disable(quiet=True)

1990

2362

1991

2363

del _interface

1992

2364

1993

mandos_dbus_service = MandosDBusService()

2365

class MandosDBusServiceTransitional(MandosDBusService):

2366

__metaclass__ = AlternateDBusNamesMetaclass

2367

mandos_dbus_service = MandosDBusServiceTransitional()

1994

2368

1995

2369

def cleanup():

1996

2370

"Cleanup function; run on exit"

1997

2371

service.cleanup()

1998

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

1999

2426

while tcp_server.clients:

2000

client = tcp_server.clients.pop()

2427

name, client = tcp_server.clients.popitem()

2001

2428

if use_dbus:

2002

2429

client.remove_from_connection()

2003

client.disable_hook = None

2004

2430

# Don't signal anything except ClientRemoved

2005

2431

client.disable(quiet=True)

2006

2432

if use_dbus:

2007

2433

# Emit D-Bus signal

2008

mandos_dbus_service.ClientRemoved(client.dbus_object_path,

2434

mandos_dbus_service.ClientRemoved(client

2435

.dbus_object_path,

2009

2436

client.name)

2437

client_settings.clear()

2010

2438

2011

2439

atexit.register(cleanup)

2012

2440

2013

for client in tcp_server.clients:

2441

for client in tcp_server.clients.itervalues():

2014

2442

if use_dbus:

2015

2443

# Emit D-Bus signal

2016

2444

mandos_dbus_service.ClientAdded(client.dbus_object_path)

2017

client.enable()

2445

# Need to initiate checking of clients

2446

if client.enabled:

2447

client.init_checker()

2018

2448

2019

2449

tcp_server.enable()

2020

2450

tcp_server.server_activate()