/mandos/trunk : revision 502

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# along with this program. If not, see

29

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

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#

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

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

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#

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34

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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65

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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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75

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try:

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SO_BINDTODEVICE = socket.SO_BINDTODEVICE

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except ImportError:

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SO_BINDTODEVICE = None

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83

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version = "1.4.1"

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stored_state_file = "clients.pickle"

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logger = logging.getLogger()

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version = "1.3.1"

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#logger = logging.getLogger('mandos')

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logger = logging.Logger('mandos')

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syslogger = (logging.handlers.SysLogHandler

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(facility = logging.handlers.SysLogHandler.LOG_DAEMON,

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

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try:

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if_nametoindex = (ctypes.cdll.LoadLibrary

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

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.if_nametoindex)

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except (OSError, AttributeError):

101

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(level=logging.WARNING):

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"""init logger and add loglevel"""

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syslogger.setFormatter(logging.Formatter

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

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' %(message)s'))

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logger.addHandler(syslogger)

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console = logging.StreamHandler()

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

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' [%(process)d]:'

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' %(levelname)s:'

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' %(message)s'))

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logger.addHandler(console)

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logger.setLevel(level)

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129

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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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134

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class PGPEngine(object):

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

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def __init__(self):

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self.gnupg = GnuPGInterface.GnuPG()

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

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self.gnupg = GnuPGInterface.GnuPG()

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self.gnupg.options.meta_interactive = False

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self.gnupg.options.homedir = self.tempdir

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

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'--quiet'])

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def __enter__(self):

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return self

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

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self._cleanup()

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return False

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def __del__(self):

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self._cleanup()

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def _cleanup(self):

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if self.tempdir is not None:

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# Delete contents of tempdir

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

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topdown = False):

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for filename in files:

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

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for dirname in dirs:

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

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# Remove tempdir

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os.rmdir(self.tempdir)

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self.tempdir = None

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def password_encode(self, password):

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

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

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

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def encrypt(self, data, password):

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

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with open(os.devnull) as devnull:

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try:

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

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

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attach_fhs={'stderr': devnull})

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

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f.write(data)

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

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ciphertext = f.read()

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proc.wait()

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except IOError as e:

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raise PGPError(e)

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self.gnupg.passphrase = None

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return ciphertext

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def decrypt(self, data, password):

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

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with open(os.devnull) as devnull:

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try:

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

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

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attach_fhs={'stderr': devnull})

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

199

f.write(data)

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

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decrypted_plaintext = f.read()

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proc.wait()

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except IOError as e:

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raise PGPError(e)

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self.gnupg.passphrase = None

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return decrypted_plaintext

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92

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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97

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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102

210

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class AvahiError(Exception):

211

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

266

159

" after %i retries, exiting.",

267

160

self.rename_count)

268

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raise AvahiServiceError("Too many renames")

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self.name = unicode(self.server

270

.GetAlternativeServiceName(self.name))

162

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

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

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self.name)

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syslogger.setFormatter(logging.Formatter

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

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

168

% self.name))

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169

self.remove()

274

170

try:

275

171

self.add()

295

191

avahi.DBUS_INTERFACE_ENTRY_GROUP)

296

192

self.entry_group_state_changed_match = (

297

193

self.group.connect_to_signal(

298

'StateChanged', self.entry_group_state_changed))

194

'StateChanged', self .entry_group_state_changed))

299

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

300

196

self.name, self.type)

301

197

self.group.AddService(

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223

try:

328

224

self.group.Free()

329

225

except (dbus.exceptions.UnknownMethodException,

330

dbus.exceptions.DBusException):

226

dbus.exceptions.DBusException) as e:

331

227

pass

332

228

self.group = None

333

229

self.remove()

367

263

self.server_state_changed)

368

264

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

369

265

370

class AvahiServiceToSyslog(AvahiService):

371

def rename(self):

372

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

373

ret = AvahiService.rename(self)

374

syslogger.setFormatter(logging.Formatter

375

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

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

377

% self.name))

378

return ret

379

266

380

def timedelta_to_milliseconds(td):

267

def _timedelta_to_milliseconds(td):

381

268

"Convert a datetime.timedelta() to milliseconds"

382

269

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

383

270

+ (td.seconds * 1000)

387

274

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

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389

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Attributes:

390

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

277

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

391

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

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

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

400

287

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

401

288

checker_initiator_tag: a gobject event source tag, or None

402

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

403

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)

406

292

disable_initiator_tag: a gobject event source tag, or None

407

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enabled: bool()

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

411

297

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

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

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

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last_checker_status: integer between 0 and 255 reflecting exit

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status of last checker. -1 reflects crashed

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checker, or None.

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

300

last_enabled: datetime.datetime(); (UTC)

418

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

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D-Bus identifiers

420

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

430

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

431

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

432

315

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

433

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

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"extended_timeout": "15m",

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"interval": "2m",

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

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"host": "",

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"approval_delay": "0s",

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"approval_duration": "1s",

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"approved_by_default": "True",

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"enabled": "True",

442

}

443

316

444

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def timeout_milliseconds(self):

445

318

"Return the 'timeout' attribute in milliseconds"

446

return timedelta_to_milliseconds(self.timeout)

447

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return _timedelta_to_milliseconds(self.timeout)

320

448

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def extended_timeout_milliseconds(self):

449

322

"Return the 'extended_timeout' attribute in milliseconds"

450

return timedelta_to_milliseconds(self.extended_timeout)

323

return _timedelta_to_milliseconds(self.extended_timeout)

451

324

452

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def interval_milliseconds(self):

453

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"Return the 'interval' attribute in milliseconds"

454

return timedelta_to_milliseconds(self.interval)

455

327

return _timedelta_to_milliseconds(self.interval)

328

456

329

def approval_delay_milliseconds(self):

457

return timedelta_to_milliseconds(self.approval_delay)

458

459

@staticmethod

460

def config_parser(config):

461

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

462

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

463

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

464

settings = {}

465

for client_name in config.sections():

466

section = dict(config.items(client_name))

467

client = settings[client_name] = {}

468

469

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

470

# Reformat values from string types to Python types

471

client["approved_by_default"] = config.getboolean(

472

client_name, "approved_by_default")

473

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

474

475

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

476

.replace(" ", ""))

477

if "secret" in section:

478

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

479

elif "secfile" in section:

480

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

481

(section["secfile"])),

482

"rb") as secfile:

483

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

484

else:

485

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

486

% section)

487

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

488

client["extended_timeout"] = string_to_delta(

489

section["extended_timeout"])

490

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

491

client["approval_delay"] = string_to_delta(

492

section["approval_delay"])

493

client["approval_duration"] = string_to_delta(

494

section["approval_duration"])

495

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

496

client["last_approval_request"] = None

497

client["last_checked_ok"] = None

498

client["last_checker_status"] = None

499

if client["enabled"]:

500

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

501

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

502

+ client["timeout"])

503

else:

504

client["last_enabled"] = None

505

client["expires"] = None

506

507

return settings

508

509

510

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

330

return _timedelta_to_milliseconds(self.approval_delay)

331

332

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

511

333

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

512

334

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

513

335

attribute."""

514

336

self.name = name

515

# adding all client settings

516

for setting, value in settings.iteritems():

517

setattr(self, setting, value)

518

337

if config is None:

338

config = {}

519

339

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

520

340

# Uppercase and remove spaces from fingerprint for later

521

341

# comparison purposes with return value from the fingerprint()

522

342

# function

343

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

344

.replace(" ", ""))

523

345

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

524

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

525

526

# attributes specific for this server instance

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

527

366

self.checker = None

528

367

self.checker_initiator_tag = None

529

368

self.disable_initiator_tag = None

369

self.expires = None

530

370

self.checker_callback_tag = None

371

self.checker_command = config["checker"]

531

372

self.current_checker_command = None

532

self.approved = None

373

self.last_connect = None

374

self._approved = None

375

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

376

True)

533

377

self.approvals_pending = 0

534

self.changedstate = (multiprocessing_manager

535

.Condition(multiprocessing_manager

536

.Lock()))

537

self.client_structure = [attr for attr in

538

self.__dict__.iterkeys()

539

if not attr.startswith("_")]

540

self.client_structure.append("client_structure")

541

542

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

543

lambda obj:

544

isinstance(obj,

545

property)):

546

if not name.startswith("_"):

547

self.client_structure.append(name)

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())

548

383

549

# Send notice to process children that client state has changed

550

384

def send_changedstate(self):

551

with self.changedstate:

552

self.changedstate.notify_all()

553

385

self.changedstate.acquire()

386

self.changedstate.notify_all()

387

self.changedstate.release()

388

554

389

def enable(self):

555

390

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

556

391

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

557

392

# Already enabled

558

393

return

559

394

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

560

401

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

402

self.disable_initiator_tag = (gobject.timeout_add

403

(self.timeout_milliseconds(),

404

self.disable))

561

405

self.enabled = True

562

406

self.last_enabled = datetime.datetime.utcnow()

563

self.init_checker()

407

# Also start a new checker *right now*.

408

self.start_checker()

564

409

565

410

def disable(self, quiet=True):

566

411

"""Disable this client."""

578

423

gobject.source_remove(self.checker_initiator_tag)

579

424

self.checker_initiator_tag = None

580

425

self.stop_checker()

426

if self.disable_hook:

427

self.disable_hook(self)

581

428

self.enabled = False

582

429

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

583

430

return False

584

431

585

432

def __del__(self):

433

self.disable_hook = None

586

434

self.disable()

587

435

588

def init_checker(self):

589

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

590

# and every interval from then on.

591

self.checker_initiator_tag = (gobject.timeout_add

592

(self.interval_milliseconds(),

593

self.start_checker))

594

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

595

self.disable_initiator_tag = (gobject.timeout_add

596

(self.timeout_milliseconds(),

597

self.disable))

598

# Also start a new checker *right now*.

599

self.start_checker()

600

601

436

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

602

437

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

603

438

self.checker_callback_tag = None

604

439

self.checker = None

605

440

if os.WIFEXITED(condition):

606

self.last_checker_status = os.WEXITSTATUS(condition)

607

if self.last_checker_status == 0:

441

exitstatus = os.WEXITSTATUS(condition)

442

if exitstatus == 0:

608

443

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

609

444

vars(self))

610

445

self.checked_ok()

612

447

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

613

448

vars(self))

614

449

else:

615

self.last_checker_status = -1

616

450

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

617

451

vars(self))

618

452

625

459

if timeout is None:

626

460

timeout = self.timeout

627

461

self.last_checked_ok = datetime.datetime.utcnow()

628

if self.disable_initiator_tag is not None:

629

gobject.source_remove(self.disable_initiator_tag)

630

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

631

self.disable_initiator_tag = (gobject.timeout_add

632

(timedelta_to_milliseconds

633

(timeout), self.disable))

634

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

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))

635

467

636

468

def need_approval(self):

637

469

self.last_approval_request = datetime.datetime.utcnow()

677

509

'replace')))

678

510

for attr in

679

511

self.runtime_expansions)

680

512

681

513

try:

682

514

command = self.checker_command % escaped_attrs

683

515

except TypeError as error:

729

561

raise

730

562

self.checker = None

731

563

732

733

564

def dbus_service_property(dbus_interface, signature="v",

734

565

access="readwrite", byte_arrays=False):

735

566

"""Decorators for marking methods of a DBusObjectWithProperties to

781

612

782

613

class DBusObjectWithProperties(dbus.service.Object):

783

614

"""A D-Bus object with properties.

784

615

785

616

Classes inheriting from this can use the dbus_service_property

786

617

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

787

618

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

794

625

def _get_all_dbus_properties(self):

795

626

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

796

627

"""

797

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

798

for cls in self.__class__.__mro__

628

return ((prop._dbus_name, prop)

799

629

for name, prop in

800

inspect.getmembers(cls, self._is_dbus_property))

630

inspect.getmembers(self, self._is_dbus_property))

801

631

802

632

def _get_dbus_property(self, interface_name, property_name):

803

633

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

804

634

property with the specified name and interface.

805

635

"""

806

for cls in self.__class__.__mro__:

807

for name, value in (inspect.getmembers

808

(cls, self._is_dbus_property)):

809

if (value._dbus_name == property_name

810

and value._dbus_interface == interface_name):

811

return value.__get__(self)

812

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

813

646

# No such property

814

647

raise DBusPropertyNotFound(self.dbus_object_path + ":"

815

648

+ interface_name + "."

849

682

def GetAll(self, interface_name):

850

683

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

851

684

standard.

852

685

853

686

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

854

687

"""

855

properties = {}

688

all = {}

856

689

for name, prop in self._get_all_dbus_properties():

857

690

if (interface_name

858

691

and interface_name != prop._dbus_interface):

863

696

continue

864

697

value = prop()

865

698

if not hasattr(value, "variant_level"):

866

properties[name] = value

699

all[name] = value

867

700

continue

868

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

869

value.variant_level+1)

870

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

701

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

702

value.variant_level+1)

703

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

871

704

872

705

@dbus.service.method(dbus.INTROSPECTABLE_IFACE,

873

706

out_signature="s",

924

757

return dbus.String(dt.isoformat(),

925

758

variant_level=variant_level)

926

759

927

928

class AlternateDBusNamesMetaclass(DBusObjectWithProperties

929

.__metaclass__):

930

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

931

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

932

"""

933

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

934

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

935

# methods, signals, or properties in them

936

for base in (b for b in bases

937

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

938

# Go though all attributes of the base class

939

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

940

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

941

# with the wrong interface name

942

if (not hasattr(attribute, "_dbus_interface")

943

or not attribute._dbus_interface

944

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

945

continue

946

# Create an alternate D-Bus interface name based on

947

# the current name

948

alt_interface = (attribute._dbus_interface

949

.replace("se.recompile.Mandos",

950

"se.bsnet.fukt.Mandos"))

951

# Is this a D-Bus signal?

952

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

953

# Extract the original non-method function by

954

# black magic

955

nonmethod_func = (dict(

956

zip(attribute.func_code.co_freevars,

957

attribute.__closure__))["func"]

958

.cell_contents)

959

# Create a new, but exactly alike, function

960

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

961

# with the alternate D-Bus interface name

962

new_function = (dbus.service.signal

963

(alt_interface,

964

attribute._dbus_signature)

965

(types.FunctionType(

966

nonmethod_func.func_code,

967

nonmethod_func.func_globals,

968

nonmethod_func.func_name,

969

nonmethod_func.func_defaults,

970

nonmethod_func.func_closure)))

971

# Define a creator of a function to call both the

972

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

973

# signals gets sent when the function is called

974

def fixscope(func1, func2):

975

"""This function is a scope container to pass

976

func1 and func2 to the "call_both" function

977

outside of its arguments"""

978

def call_both(*args, **kwargs):

979

"""This function will emit two D-Bus

980

signals by calling func1 and func2"""

981

func1(*args, **kwargs)

982

func2(*args, **kwargs)

983

return call_both

984

# Create the "call_both" function and add it to

985

# the class

986

attr[attrname] = fixscope(attribute,

987

new_function)

988

# Is this a D-Bus method?

989

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

990

# Create a new, but exactly alike, function

991

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

992

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

993

# to the class.

994

attr[attrname] = (dbus.service.method

995

(alt_interface,

996

attribute._dbus_in_signature,

997

attribute._dbus_out_signature)

998

(types.FunctionType

999

(attribute.func_code,

1000

attribute.func_globals,

1001

attribute.func_name,

1002

attribute.func_defaults,

1003

attribute.func_closure)))

1004

# Is this a D-Bus property?

1005

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

1006

# Create a new, but exactly alike, function

1007

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

1008

# property with the alternate D-Bus interface

1009

# name. Add it to the class.

1010

attr[attrname] = (dbus_service_property

1011

(alt_interface,

1012

attribute._dbus_signature,

1013

attribute._dbus_access,

1014

attribute

1015

._dbus_get_args_options

1016

["byte_arrays"])

1017

(types.FunctionType

1018

(attribute.func_code,

1019

attribute.func_globals,

1020

attribute.func_name,

1021

attribute.func_defaults,

1022

attribute.func_closure)))

1023

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

1024

1025

1026

760

class ClientDBus(Client, DBusObjectWithProperties):

1027

761

"""A Client class using D-Bus

1028

762

1037

771

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

1038

772

1039

773

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

774

self._approvals_pending = 0

1040

775

self.bus = bus

1041

776

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

1042

self._approvals_pending = 0

1043

1044

self._approvals_pending = 0

1045

777

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

1046

778

# the D-Bus

1047

779

client_object_name = unicode(self.name).translate(

1055

787

def notifychangeproperty(transform_func,

1056

788

dbus_name, type_func=lambda x: x,

1057

789

variant_level=1):

1058

""" Modify a variable so that it's a property which announces

1059

its changes to DBus.

1060

1061

transform_fun: Function that takes a value and a variant_level

1062

and transforms it to a D-Bus type.

1063

dbus_name: D-Bus name of the variable

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

1064

795

type_func: Function that transform the value before sending it

1065

to the D-Bus. Default: no transform

1066

variant_level: D-Bus variant level. Default: 1

796

to DBus

797

variant_level: DBus variant level. default: 1

1067

798

"""

1068

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

799

real_value = [None,]

1069

800

def setter(self, value):

801

old_value = real_value[0]

802

real_value[0] = value

1070

803

if hasattr(self, "dbus_object_path"):

1071

if (not hasattr(self, attrname) or

1072

type_func(getattr(self, attrname, None))

1073

!= type_func(value)):

1074

dbus_value = transform_func(type_func(value),

1075

variant_level

1076

=variant_level)

804

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

805

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

806

variant_level)

1077

807

self.PropertyChanged(dbus.String(dbus_name),

1078

808

dbus_value)

1079

setattr(self, attrname, value)

1080

1081

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

1082

1083

809

810

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

811

812

1084

813

expires = notifychangeproperty(datetime_to_dbus, "Expires")

1085

814

approvals_pending = notifychangeproperty(dbus.Boolean,

1086

815

"ApprovalPending",

1089

818

last_enabled = notifychangeproperty(datetime_to_dbus,

1090

819

"LastEnabled")

1091

820

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

1092

type_func = lambda checker:

1093

checker is not None)

821

type_func = lambda checker: checker is not None)

1094

822

last_checked_ok = notifychangeproperty(datetime_to_dbus,

1095

823

"LastCheckedOK")

1096

last_approval_request = notifychangeproperty(

1097

datetime_to_dbus, "LastApprovalRequest")

824

last_approval_request = notifychangeproperty(datetime_to_dbus,

825

"LastApprovalRequest")

1098

826

approved_by_default = notifychangeproperty(dbus.Boolean,

1099

827

"ApprovedByDefault")

1100

approval_delay = notifychangeproperty(dbus.UInt64,

1101

"ApprovalDelay",

1102

type_func =

1103

timedelta_to_milliseconds)

1104

approval_duration = notifychangeproperty(

1105

dbus.UInt64, "ApprovalDuration",

1106

type_func = timedelta_to_milliseconds)

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)

1107

832

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

1108

timeout = notifychangeproperty(dbus.UInt64, "Timeout",

1109

type_func =

1110

timedelta_to_milliseconds)

1111

extended_timeout = notifychangeproperty(

1112

dbus.UInt64, "ExtendedTimeout",

1113

type_func = timedelta_to_milliseconds)

1114

interval = notifychangeproperty(dbus.UInt64,

1115

"Interval",

1116

type_func =

1117

timedelta_to_milliseconds)

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)

1118

839

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

1119

840

1120

841

del notifychangeproperty

1146

867

1147

868

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

1148

869

*args, **kwargs)

1149

870

1150

871

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

1151

872

old_checker = self.checker

1152

873

if self.checker is not None:

1162

883

return r

1163

884

1164

885

def _reset_approved(self):

1165

self.approved = None

886

self._approved = None

1166

887

return False

1167

888

1168

889

def approve(self, value=True):

1169

890

self.send_changedstate()

1170

self.approved = value

1171

gobject.timeout_add(timedelta_to_milliseconds

891

self._approved = value

892

gobject.timeout_add(_timedelta_to_milliseconds

1172

893

(self.approval_duration),

1173

894

self._reset_approved)

1174

895

1175

896

1176

897

## D-Bus methods, signals & properties

1177

_interface = "se.recompile.Mandos.Client"

898

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

1178

899

1179

900

## Signals

1180

901

1217

938

"D-Bus signal"

1218

939

return self.need_approval()

1219

940

1220

# NeRwequest - signal

1221

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

1222

def NewRequest(self, ip):

1223

"""D-Bus signal

1224

Is sent after a client request a password.

1225

"""

1226

pass

1227

1228

941

## Methods

1229

942

1230

943

# Approve - method

1288

1001

access="readwrite")

1289

1002

def ApprovalDuration_dbus_property(self, value=None):

1290

1003

if value is None: # get

1291

return dbus.UInt64(timedelta_to_milliseconds(

1004

return dbus.UInt64(_timedelta_to_milliseconds(

1292

1005

self.approval_duration))

1293

1006

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

1294

1007

1308

1021

def Host_dbus_property(self, value=None):

1309

1022

if value is None: # get

1310

1023

return dbus.String(self.host)

1311

self.host = unicode(value)

1024

self.host = value

1312

1025

1313

1026

# Created - property

1314

1027

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

1315

1028

def Created_dbus_property(self):

1316

return datetime_to_dbus(self.created)

1029

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

1317

1030

1318

1031

# LastEnabled - property

1319

1032

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

1363

1076

gobject.source_remove(self.disable_initiator_tag)

1364

1077

self.disable_initiator_tag = None

1365

1078

self.expires = None

1366

time_to_die = timedelta_to_milliseconds((self

1367

.last_checked_ok

1368

+ self.timeout)

1369

- datetime.datetime

1370

.utcnow())

1079

time_to_die = (self.

1080

_timedelta_to_milliseconds((self

1081

.last_checked_ok

1082

+ self.timeout)

1083

- datetime.datetime

1084

.utcnow()))

1371

1085

if time_to_die <= 0:

1372

1086

# The timeout has passed

1373

1087

self.disable()

1374

1088

else:

1375

1089

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

1376

+ datetime.timedelta(milliseconds =

1377

time_to_die))

1090

+ datetime.timedelta(milliseconds = time_to_die))

1378

1091

self.disable_initiator_tag = (gobject.timeout_add

1379

1092

(time_to_die, self.disable))

1380

1093

1381

1094

# ExtendedTimeout - property

1382

1095

@dbus_service_property(_interface, signature="t",

1383

1096

access="readwrite")

1385

1098

if value is None: # get

1386

1099

return dbus.UInt64(self.extended_timeout_milliseconds())

1387

1100

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

1388

1101

1389

1102

# Interval - property

1390

1103

@dbus_service_property(_interface, signature="t",

1391

1104

access="readwrite")

1395

1108

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

1396

1109

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

1397

1110

return

1398

if self.enabled:

1399

# Reschedule checker run

1400

gobject.source_remove(self.checker_initiator_tag)

1401

self.checker_initiator_tag = (gobject.timeout_add

1402

(value, self.start_checker))

1403

self.start_checker() # Start one now, too

1404

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

1405

1117

# Checker - property

1406

1118

@dbus_service_property(_interface, signature="s",

1407

1119

access="readwrite")

1408

1120

def Checker_dbus_property(self, value=None):

1409

1121

if value is None: # get

1410

1122

return dbus.String(self.checker_command)

1411

self.checker_command = unicode(value)

1123

self.checker_command = value

1412

1124

1413

1125

# CheckerRunning - property

1414

1126

@dbus_service_property(_interface, signature="b",

1441

1153

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

1442

1154

if not self._pipe.recv():

1443

1155

raise KeyError()

1444

1156

1445

1157

def __getattribute__(self, name):

1446

if name == '_pipe':

1158

if(name == '_pipe'):

1447

1159

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

1448

1160

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

1449

1161

data = self._pipe.recv()

1454

1166

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

1455

1167

return self._pipe.recv()[1]

1456

1168

return func

1457

1169

1458

1170

def __setattr__(self, name, value):

1459

if name == '_pipe':

1171

if(name == '_pipe'):

1460

1172

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

1461

1173

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

1462

1174

1463

1175

1464

class ClientDBusTransitional(ClientDBus):

1465

__metaclass__ = AlternateDBusNamesMetaclass

1466

1467

1468

1176

class ClientHandler(socketserver.BaseRequestHandler, object):

1469

1177

"""A class to handle client connections.

1470

1178

1477

1185

unicode(self.client_address))

1478

1186

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

1479

1187

self.server.child_pipe.fileno())

1480

1188

1481

1189

session = (gnutls.connection

1482

1190

.ClientSession(self.request,

1483

1191

gnutls.connection

1484

1192

.X509Credentials()))

1485

1193

1486

1194

# Note: gnutls.connection.X509Credentials is really a

1487

1195

# generic GnuTLS certificate credentials object so long as

1488

1196

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

1489

1197

# here despite using OpenPGP certificates.

1490

1198

1491

1199

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

1492

1200

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

1493

1201

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

1499

1207

(gnutls.library.functions

1500

1208

.gnutls_priority_set_direct(session._c_object,

1501

1209

priority, None))

1502

1210

1503

1211

# Start communication using the Mandos protocol

1504

1212

# Get protocol number

1505

1213

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

1510

1218

except (ValueError, IndexError, RuntimeError) as error:

1511

1219

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

1512

1220

return

1513

1221

1514

1222

# Start GnuTLS connection

1515

1223

try:

1516

1224

session.handshake()

1520

1228

# established. Just abandon the request.

1521

1229

return

1522

1230

logger.debug("Handshake succeeded")

1523

1231

1524

1232

approval_required = False

1525

1233

try:

1526

1234

try:

1531

1239

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

1532

1240

return

1533

1241

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

1534

1242

1535

1243

try:

1536

1244

client = ProxyClient(child_pipe, fpr,

1537

1245

self.client_address)

1538

1246

except KeyError:

1539

1247

return

1540

1248

1541

if self.server.use_dbus:

1542

# Emit D-Bus signal

1543

client.NewRequest(str(self.client_address))

1544

1545

1249

if client.approval_delay:

1546

1250

delay = client.approval_delay

1547

1251

client.approvals_pending += 1

1553

1257

client.name)

1554

1258

if self.server.use_dbus:

1555

1259

# Emit D-Bus signal

1556

client.Rejected("Disabled")

1260

client.Rejected("Disabled")

1557

1261

return

1558

1262

1559

if client.approved or not client.approval_delay:

1263

if client._approved or not client.approval_delay:

1560

1264

#We are approved or approval is disabled

1561

1265

break

1562

elif client.approved is None:

1266

elif client._approved is None:

1563

1267

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

1564

1268

client.name)

1565

1269

if self.server.use_dbus:

1576

1280

return

1577

1281

1578

1282

#wait until timeout or approved

1283

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

1579

1284

time = datetime.datetime.now()

1580

1285

client.changedstate.acquire()

1581

(client.changedstate.wait

1582

(float(client.timedelta_to_milliseconds(delay)

1583

/ 1000)))

1286

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

1584

1287

client.changedstate.release()

1585

1288

time2 = datetime.datetime.now()

1586

1289

if (time2 - time) >= delay:

1608

1311

sent, len(client.secret)

1609

1312

- (sent_size + sent))

1610

1313

sent_size += sent

1611

1314

1612

1315

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

1613

# bump the timeout using extended_timeout

1316

# bump the timeout as if seen

1614

1317

client.checked_ok(client.extended_timeout)

1615

1318

if self.server.use_dbus:

1616

1319

# Emit D-Bus signal

1684

1387

# Convert the buffer to a Python bytestring

1685

1388

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

1686

1389

# Convert the bytestring to hexadecimal notation

1687

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

1390

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

1688

1391

return hex_fpr

1689

1392

1690

1393

1693

1396

def sub_process_main(self, request, address):

1694

1397

try:

1695

1398

self.finish_request(request, address)

1696

except Exception:

1399

except:

1697

1400

self.handle_error(request, address)

1698

1401

self.close_request(request)

1699

1402

1700

1403

def process_request(self, request, address):

1701

1404

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

1702

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

1703

args = (request,

1704

address))

1705

proc.start()

1706

return proc

1707

1405

multiprocessing.Process(target = self.sub_process_main,

1406

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

1708

1407

1709

1408

class MultiprocessingMixInWithPipe(MultiprocessingMixIn, object):

1710

1409

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

1714

1413

This function creates a new pipe in self.pipe

1715

1414

"""

1716

1415

parent_pipe, self.child_pipe = multiprocessing.Pipe()

1717

1718

proc = MultiprocessingMixIn.process_request(self, request,

1719

client_address)

1416

1417

super(MultiprocessingMixInWithPipe,

1418

self).process_request(request, client_address)

1720

1419

self.child_pipe.close()

1721

self.add_pipe(parent_pipe, proc)

1722

1723

def add_pipe(self, parent_pipe, proc):

1420

self.add_pipe(parent_pipe)

1421

1422

def add_pipe(self, parent_pipe):

1724

1423

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

1725

1424

raise NotImplementedError

1726

1425

1727

1728

1426

class IPv6_TCPServer(MultiprocessingMixInWithPipe,

1729

1427

socketserver.TCPServer, object):

1730

1428

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

1804

1502

self.enabled = False

1805

1503

self.clients = clients

1806

1504

if self.clients is None:

1807

self.clients = {}

1505

self.clients = set()

1808

1506

self.use_dbus = use_dbus

1809

1507

self.gnutls_priority = gnutls_priority

1810

1508

IPv6_TCPServer.__init__(self, server_address,

1814

1512

def server_activate(self):

1815

1513

if self.enabled:

1816

1514

return socketserver.TCPServer.server_activate(self)

1817

1818

1515

def enable(self):

1819

1516

self.enabled = True

1820

1821

def add_pipe(self, parent_pipe, proc):

1517

def add_pipe(self, parent_pipe):

1822

1518

# Call "handle_ipc" for both data and EOF events

1823

1519

gobject.io_add_watch(parent_pipe.fileno(),

1824

1520

gobject.IO_IN | gobject.IO_HUP,

1825

1521

functools.partial(self.handle_ipc,

1826

parent_pipe =

1827

parent_pipe,

1828

proc = proc))

1829

1522

parent_pipe = parent_pipe))

1523

1830

1524

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

1831

proc = None, client_object=None):

1525

client_object=None):

1832

1526

condition_names = {

1833

1527

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

1834

1528

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

1843

1537

for cond, name in

1844

1538

condition_names.iteritems()

1845

1539

if cond & condition)

1846

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

1540

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

1847

1541

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

1848

# Wait for other process to exit

1849

proc.join()

1850

1542

return False

1851

1543

1852

1544

# Read a request from the child

1857

1549

fpr = request[1]

1858

1550

address = request[2]

1859

1551

1860

for c in self.clients.itervalues():

1552

for c in self.clients:

1861

1553

if c.fingerprint == fpr:

1862

1554

client = c

1863

1555

break

1866

1558

"dress: %s", fpr, address)

1867

1559

if self.use_dbus:

1868

1560

# Emit D-Bus signal

1869

mandos_dbus_service.ClientNotFound(fpr,

1870

address[0])

1561

mandos_dbus_service.ClientNotFound(fpr, address[0])

1871

1562

parent_pipe.send(False)

1872

1563

return False

1873

1564

1874

1565

gobject.io_add_watch(parent_pipe.fileno(),

1875

1566

gobject.IO_IN | gobject.IO_HUP,

1876

1567

functools.partial(self.handle_ipc,

1877

parent_pipe =

1878

parent_pipe,

1879

proc = proc,

1880

client_object =

1881

client))

1568

parent_pipe = parent_pipe,

1569

client_object = client))

1882

1570

parent_pipe.send(True)

1883

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

1884

# same fileno

1571

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

1885

1572

return False

1886

1573

if command == 'funcall':

1887

1574

funcname = request[1]

1888

1575

args = request[2]

1889

1576

kwargs = request[3]

1890

1577

1891

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

1892

funcname)(*args,

1893

**kwargs)))

1894

1578

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

1579

1895

1580

if command == 'getattr':

1896

1581

attrname = request[1]

1897

1582

if callable(client_object.__getattribute__(attrname)):

1898

1583

parent_pipe.send(('function',))

1899

1584

else:

1900

parent_pipe.send(('data', client_object

1901

.__getattribute__(attrname)))

1585

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

1902

1586

1903

1587

if command == 'setattr':

1904

1588

attrname = request[1]

1905

1589

value = request[2]

1906

1590

setattr(client_object, attrname, value)

1907

1591

1908

1592

return True

1909

1593

1910

1594

1947

1631

return timevalue

1948

1632

1949

1633

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

1950

1658

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

1951

1659

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

1952

1660

2007

1715

" system bus interface")

2008

1716

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

2009

1717

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

2010

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

2011

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

2012

" state")

2013

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

2014

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

2015

2016

1718

options = parser.parse_args()

2017

1719

2018

1720

if options.check:

2031

1733

"use_dbus": "True",

2032

1734

"use_ipv6": "True",

2033

1735

"debuglevel": "",

2034

"restore": "True",

2035

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

2036

1736

}

2037

1737

2038

1738

# Parse config file for server-global settings

2055

1755

# options, if set.

2056

1756

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

2057

1757

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

2058

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

2059

"statedir"):

1758

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

2060

1759

value = getattr(options, option)

2061

1760

if value is not None:

2062

1761

server_settings[option] = value

2074

1773

debuglevel = server_settings["debuglevel"]

2075

1774

use_dbus = server_settings["use_dbus"]

2076

1775

use_ipv6 = server_settings["use_ipv6"]

2077

stored_state_path = os.path.join(server_settings["statedir"],

2078

stored_state_file)

2079

2080

if debug:

2081

initlogger(logging.DEBUG)

2082

else:

2083

if not debuglevel:

2084

initlogger()

2085

else:

2086

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

2087

initlogger(level)

2088

1776

2089

1777

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

2090

1778

syslogger.setFormatter(logging.Formatter

2091

1779

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

2093

1781

% server_settings["servicename"]))

2094

1782

2095

1783

# Parse config file with clients

2096

client_config = configparser.SafeConfigParser(Client.client_defaults)

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

1793

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

2098

1794

"clients.conf"))

2099

1795

2137

1833

if error[0] != errno.EPERM:

2138

1834

raise error

2139

1835

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

2140

1844

if debug:

2141

1845

# Enable all possible GnuTLS debugging

2142

1846

2165

1869

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

2166

1870

daemon()

2167

1871

2168

gobject.threads_init()

2169

2170

1872

global main_loop

2171

1873

# From the Avahi example code

2172

1874

DBusGMainLoop(set_as_default=True )

2175

1877

# End of Avahi example code

2176

1878

if use_dbus:

2177

1879

try:

2178

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

1880

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

2179

1881

bus, do_not_queue=True)

2180

old_bus_name = (dbus.service.BusName

2181

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

2182

do_not_queue=True))

2183

1882

except dbus.exceptions.NameExistsException as e:

2184

1883

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

2185

1884

use_dbus = False

2186

1885

server_settings["use_dbus"] = False

2187

1886

tcp_server.use_dbus = False

2188

1887

protocol = avahi.PROTO_INET6 if use_ipv6 else avahi.PROTO_INET

2189

service = AvahiServiceToSyslog(name =

2190

server_settings["servicename"],

2191

servicetype = "_mandos._tcp",

2192

protocol = protocol, bus = bus)

1888

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

1889

servicetype = "_mandos._tcp",

1890

protocol = protocol, bus = bus)

2193

1891

if server_settings["interface"]:

2194

1892

service.interface = (if_nametoindex

2195

1893

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

2199

1897

2200

1898

client_class = Client

2201

1899

if use_dbus:

2202

client_class = functools.partial(ClientDBusTransitional,

2203

bus = bus)

2204

2205

client_settings = Client.config_parser(client_config)

2206

old_client_settings = {}

2207

clients_data = {}

2208

2209

# Get client data and settings from last running state.

2210

if server_settings["restore"]:

2211

try:

2212

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

2213

clients_data, old_client_settings = (pickle.load

2214

(stored_state))

2215

os.remove(stored_state_path)

2216

except IOError as e:

2217

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

2218

.format(e))

2219

if e.errno != errno.ENOENT:

2220

raise

2221

except EOFError as e:

2222

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

2223

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

2224

2225

with PGPEngine() as pgp:

2226

for client_name, client in clients_data.iteritems():

2227

# Decide which value to use after restoring saved state.

2228

# We have three different values: Old config file,

2229

# new config file, and saved state.

2230

# New config value takes precedence if it differs from old

2231

# config value, otherwise use saved state.

2232

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

2233

try:

2234

# For each value in new config, check if it

2235

# differs from the old config value (Except for

2236

# the "secret" attribute)

2237

if (name != "secret" and

2238

value != old_client_settings[client_name]

2239

[name]):

2240

client[name] = value

2241

except KeyError:

2242

pass

2243

2244

# Clients who has passed its expire date can still be

2245

# enabled if its last checker was successful. Clients

2246

# whose checker failed before we stored its state is

2247

# assumed to have failed all checkers during downtime.

2248

if client["enabled"]:

2249

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

2250

if not client["last_checked_ok"]:

2251

logger.warning(

2252

"disabling client {0} - Client never "

2253

"performed a successfull checker"

2254

.format(client["name"]))

2255

client["enabled"] = False

2256

elif client["last_checker_status"] != 0:

2257

logger.warning(

2258

"disabling client {0} - Client "

2259

"last checker failed with error code {1}"

2260

.format(client["name"],

2261

client["last_checker_status"]))

2262

client["enabled"] = False

2263

else:

2264

client["expires"] = (datetime.datetime

2265

.utcnow()

2266

+ client["timeout"])

2267

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):

2268

1908

try:

2269

client["secret"] = (

2270

pgp.decrypt(client["encrypted_secret"],

2271

client_settings[client_name]

2272

["secret"]))

2273

except PGPError:

2274

# If decryption fails, we use secret from new settings

2275

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

2276

.format(client_name))

2277

client["secret"] = (

2278

client_settings[client_name]["secret"])

2279

2280

2281

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

2282

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

2283

del clients_data[client_name]

2284

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

2285

clients_data[client_name] = client_settings[client_name]

2286

2287

# Create clients all clients

2288

for client_name, client in clients_data.iteritems():

2289

tcp_server.clients[client_name] = client_class(

2290

name = client_name, settings = client)

2291

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()))

2292

1918

if not tcp_server.clients:

2293

1919

logger.warning("No clients defined")

2294

1920

2305

1931

# "pidfile" was never created

2306

1932

pass

2307

1933

del pidfilename

1934

2308

1935

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

2309

1936

2310

1937

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

2311

1938

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

2312

1939

2315

1942

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

2316

1943

def __init__(self):

2317

1944

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

2318

_interface = "se.recompile.Mandos"

1945

_interface = "se.bsnet.fukt.Mandos"

2319

1946

2320

1947

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

2321

1948

def ClientAdded(self, objpath):

2336

1963

def GetAllClients(self):

2337

1964

"D-Bus method"

2338

1965

return dbus.Array(c.dbus_object_path

2339

for c in

2340

tcp_server.clients.itervalues())

1966

for c in tcp_server.clients)

2341

1967

2342

1968

@dbus.service.method(_interface,

2343

1969

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

2345

1971

"D-Bus method"

2346

1972

return dbus.Dictionary(

2347

1973

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

2348

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

1974

for c in tcp_server.clients),

2349

1975

signature="oa{sv}")

2350

1976

2351

1977

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

2352

1978

def RemoveClient(self, object_path):

2353

1979

"D-Bus method"

2354

for c in tcp_server.clients.itervalues():

1980

for c in tcp_server.clients:

2355

1981

if c.dbus_object_path == object_path:

2356

del tcp_server.clients[c.name]

1982

tcp_server.clients.remove(c)

2357

1983

c.remove_from_connection()

2358

1984

# Don't signal anything except ClientRemoved

2359

1985

c.disable(quiet=True)

2364

1990

2365

1991

del _interface

2366

1992

2367

class MandosDBusServiceTransitional(MandosDBusService):

2368

__metaclass__ = AlternateDBusNamesMetaclass

2369

mandos_dbus_service = MandosDBusServiceTransitional()

1993

mandos_dbus_service = MandosDBusService()

2370

1994

2371

1995

def cleanup():

2372

1996

"Cleanup function; run on exit"

2373

1997

service.cleanup()

2374

1998

2375

multiprocessing.active_children()

2376

if not (tcp_server.clients or client_settings):

2377

return

2378

2379

# Store client before exiting. Secrets are encrypted with key

2380

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

2381

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

2382

clients = {}

2383

with PGPEngine() as pgp:

2384

for client in tcp_server.clients.itervalues():

2385

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

2386

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

2387

key)

2388

client_dict = {}

2389

2390

# A list of attributes that can not be pickled

2391

# + secret.

2392

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

2393

"checker"))

2394

for name, typ in (inspect.getmembers

2395

(dbus.service.Object)):

2396

exclude.add(name)

2397

2398

client_dict["encrypted_secret"] = (client

2399

.encrypted_secret)

2400

for attr in client.client_structure:

2401

if attr not in exclude:

2402

client_dict[attr] = getattr(client, attr)

2403

2404

clients[client.name] = client_dict

2405

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

2406

2407

try:

2408

with os.fdopen(os.open(stored_state_path,

2409

os.O_CREAT|os.O_WRONLY|os.O_TRUNC,

2410

0600), "wb") as stored_state:

2411

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

2412

except (IOError, OSError) as e:

2413

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

2414

.format(e))

2415

if e.errno not in (errno.ENOENT, errno.EACCES):

2416

raise

2417

2418

# Delete all clients, and settings from config

2419

1999

while tcp_server.clients:

2420

name, client = tcp_server.clients.popitem()

2000

client = tcp_server.clients.pop()

2421

2001

if use_dbus:

2422

2002

client.remove_from_connection()

2003

client.disable_hook = None

2423

2004

# Don't signal anything except ClientRemoved

2424

2005

client.disable(quiet=True)

2425

2006

if use_dbus:

2426

2007

# Emit D-Bus signal

2427

mandos_dbus_service.ClientRemoved(client

2428

.dbus_object_path,

2008

mandos_dbus_service.ClientRemoved(client.dbus_object_path,

2429

2009

client.name)

2430

client_settings.clear()

2431

2010

2432

2011

atexit.register(cleanup)

2433

2012

2434

for client in tcp_server.clients.itervalues():

2013

for client in tcp_server.clients:

2435

2014

if use_dbus:

2436

2015

# Emit D-Bus signal

2437

2016

mandos_dbus_service.ClientAdded(client.dbus_object_path)

2438

# Need to initiate checking of clients

2439

if client.enabled:

2440

client.init_checker()

2017

client.enable()

2441

2018

2442

2019

tcp_server.enable()

2443

2020

tcp_server.server_activate()