/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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#

31

# 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

69

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import dbus

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import dbus.service

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72

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

85

81

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)

100

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:'

118

' %(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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135

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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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154

def __del__(self):

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self._cleanup()

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def _cleanup(self):

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if self.tempdir is not None:

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# Delete contents of tempdir

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

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topdown = False):

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for filename in files:

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

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for dirname in dirs:

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

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# Remove tempdir

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os.rmdir(self.tempdir)

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self.tempdir = None

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def password_encode(self, password):

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

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

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

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def encrypt(self, data, password):

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

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with open(os.devnull) as devnull:

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try:

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

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

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attach_fhs={'stderr': devnull})

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

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f.write(data)

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

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ciphertext = f.read()

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proc.wait()

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except IOError as e:

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raise PGPError(e)

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self.gnupg.passphrase = None

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return ciphertext

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def decrypt(self, data, password):

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

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with open(os.devnull) as devnull:

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try:

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

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

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attach_fhs={'stderr': devnull})

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

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f.write(data)

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

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decrypted_plaintext = f.read()

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proc.wait()

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except IOError as e:

205

raise PGPError(e)

206

self.gnupg.passphrase = None

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return decrypted_plaintext

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209

92

syslogger.setFormatter(logging.Formatter

93

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

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' %(message)s'))

95

logger.addHandler(syslogger)

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97

console = logging.StreamHandler()

98

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

211

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class AvahiError(Exception):

212

104

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

267

159

" after %i retries, exiting.",

268

160

self.rename_count)

269

161

raise AvahiServiceError("Too many renames")

270

self.name = unicode(self.server

271

.GetAlternativeServiceName(self.name))

162

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

272

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

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164

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))

274

169

self.remove()

275

170

try:

276

171

self.add()

296

191

avahi.DBUS_INTERFACE_ENTRY_GROUP)

297

192

self.entry_group_state_changed_match = (

298

193

self.group.connect_to_signal(

299

'StateChanged', self.entry_group_state_changed))

194

'StateChanged', self .entry_group_state_changed))

300

195

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

301

196

self.name, self.type)

302

197

self.group.AddService(

328

223

try:

329

224

self.group.Free()

330

225

except (dbus.exceptions.UnknownMethodException,

331

dbus.exceptions.DBusException):

226

dbus.exceptions.DBusException) as e:

332

227

pass

333

228

self.group = None

334

229

self.remove()

368

263

self.server_state_changed)

369

264

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

370

265

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

376

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

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

378

% self.name))

379

return ret

380

266

381

def timedelta_to_milliseconds(td):

267

def _timedelta_to_milliseconds(td):

382

268

"Convert a datetime.timedelta() to milliseconds"

383

269

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

384

270

+ (td.seconds * 1000)

388

274

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

389

275

390

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Attributes:

391

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

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

392

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

393

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

394

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

401

287

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

402

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checker_initiator_tag: a gobject event source tag, or None

403

289

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

406

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current_checker_command: string; current running checker_command

291

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

407

292

disable_initiator_tag: a gobject event source tag, or None

408

293

enabled: bool()

409

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

412

297

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

413

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

414

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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)

419

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

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302

D-Bus identifiers

421

303

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

431

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

432

314

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

433

315

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

434

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

435

"extended_timeout": "15m",

436

"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",

441

"approved_by_default": "True",

442

"enabled": "True",

443

}

444

316

445

317

def timeout_milliseconds(self):

446

318

"Return the 'timeout' attribute in milliseconds"

447

return timedelta_to_milliseconds(self.timeout)

448

319

return _timedelta_to_milliseconds(self.timeout)

320

449

321

def extended_timeout_milliseconds(self):

450

322

"Return the 'extended_timeout' attribute in milliseconds"

451

return timedelta_to_milliseconds(self.extended_timeout)

323

return _timedelta_to_milliseconds(self.extended_timeout)

452

324

453

325

def interval_milliseconds(self):

454

326

"Return the 'interval' attribute in milliseconds"

455

return timedelta_to_milliseconds(self.interval)

456

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return _timedelta_to_milliseconds(self.interval)

328

457

329

def approval_delay_milliseconds(self):

458

return timedelta_to_milliseconds(self.approval_delay)

459

460

@staticmethod

461

def config_parser(config):

462

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

463

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

464

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

465

settings = {}

466

for client_name in config.sections():

467

section = dict(config.items(client_name))

468

client = settings[client_name] = {}

469

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):

330

return _timedelta_to_milliseconds(self.approval_delay)

331

332

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

512

333

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

513

334

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

514

335

attribute."""

515

336

self.name = name

516

# adding all client settings

517

for setting, value in settings.iteritems():

518

setattr(self, setting, value)

519

337

if config is None:

338

config = {}

520

339

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

521

340

# Uppercase and remove spaces from fingerprint for later

522

341

# comparison purposes with return value from the fingerprint()

523

342

# function

343

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

344

.replace(" ", ""))

524

345

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

525

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

526

527

# 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

528

366

self.checker = None

529

367

self.checker_initiator_tag = None

530

368

self.disable_initiator_tag = None

369

self.expires = None

531

370

self.checker_callback_tag = None

371

self.checker_command = config["checker"]

532

372

self.current_checker_command = None

533

self.approved = None

373

self.last_connect = None

374

self._approved = None

375

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

376

True)

534

377

self.approvals_pending = 0

535

self.changedstate = (multiprocessing_manager

536

.Condition(multiprocessing_manager

537

.Lock()))

538

self.client_structure = [attr for attr in

539

self.__dict__.iterkeys()

540

if not attr.startswith("_")]

541

self.client_structure.append("client_structure")

542

543

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

544

lambda obj:

545

isinstance(obj,

546

property)):

547

if not name.startswith("_"):

548

self.client_structure.append(name)

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())

549

383

550

# Send notice to process children that client state has changed

551

384

def send_changedstate(self):

552

with self.changedstate:

553

self.changedstate.notify_all()

554

385

self.changedstate.acquire()

386

self.changedstate.notify_all()

387

self.changedstate.release()

388

555

389

def enable(self):

556

390

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

557

391

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

558

392

# Already enabled

559

393

return

560

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

561

401

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

402

self.disable_initiator_tag = (gobject.timeout_add

403

(self.timeout_milliseconds(),

404

self.disable))

562

405

self.enabled = True

563

406

self.last_enabled = datetime.datetime.utcnow()

564

self.init_checker()

407

# Also start a new checker *right now*.

408

self.start_checker()

565

409

566

410

def disable(self, quiet=True):

567

411

"""Disable this client."""

579

423

gobject.source_remove(self.checker_initiator_tag)

580

424

self.checker_initiator_tag = None

581

425

self.stop_checker()

426

if self.disable_hook:

427

self.disable_hook(self)

582

428

self.enabled = False

583

429

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

584

430

return False

585

431

586

432

def __del__(self):

433

self.disable_hook = None

587

434

self.disable()

588

435

589

def init_checker(self):

590

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

591

# and every interval from then on.

592

self.checker_initiator_tag = (gobject.timeout_add

593

(self.interval_milliseconds(),

594

self.start_checker))

595

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

596

self.disable_initiator_tag = (gobject.timeout_add

597

(self.timeout_milliseconds(),

598

self.disable))

599

# Also start a new checker *right now*.

600

self.start_checker()

601

602

436

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

603

437

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

604

438

self.checker_callback_tag = None

605

439

self.checker = None

606

440

if os.WIFEXITED(condition):

607

self.last_checker_status = os.WEXITSTATUS(condition)

608

if self.last_checker_status == 0:

441

exitstatus = os.WEXITSTATUS(condition)

442

if exitstatus == 0:

609

443

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

610

444

vars(self))

611

445

self.checked_ok()

613

447

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

614

448

vars(self))

615

449

else:

616

self.last_checker_status = -1

617

450

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

618

451

vars(self))

619

452

626

459

if timeout is None:

627

460

timeout = self.timeout

628

461

self.last_checked_ok = datetime.datetime.utcnow()

629

if self.disable_initiator_tag is not None:

630

gobject.source_remove(self.disable_initiator_tag)

631

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

632

self.disable_initiator_tag = (gobject.timeout_add

633

(timedelta_to_milliseconds

634

(timeout), self.disable))

635

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

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))

636

467

637

468

def need_approval(self):

638

469

self.last_approval_request = datetime.datetime.utcnow()

678

509

'replace')))

679

510

for attr in

680

511

self.runtime_expansions)

681

512

682

513

try:

683

514

command = self.checker_command % escaped_attrs

684

515

except TypeError as error:

730

561

raise

731

562

self.checker = None

732

563

733

734

564

def dbus_service_property(dbus_interface, signature="v",

735

565

access="readwrite", byte_arrays=False):

736

566

"""Decorators for marking methods of a DBusObjectWithProperties to

782

612

783

613

class DBusObjectWithProperties(dbus.service.Object):

784

614

"""A D-Bus object with properties.

785

615

786

616

Classes inheriting from this can use the dbus_service_property

787

617

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

788

618

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

795

625

def _get_all_dbus_properties(self):

796

626

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

797

627

"""

798

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

799

for cls in self.__class__.__mro__

628

return ((prop._dbus_name, prop)

800

629

for name, prop in

801

inspect.getmembers(cls, self._is_dbus_property))

630

inspect.getmembers(self, self._is_dbus_property))

802

631

803

632

def _get_dbus_property(self, interface_name, property_name):

804

633

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

805

634

property with the specified name and interface.

806

635

"""

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

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

814

646

# No such property

815

647

raise DBusPropertyNotFound(self.dbus_object_path + ":"

816

648

+ interface_name + "."

850

682

def GetAll(self, interface_name):

851

683

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

852

684

standard.

853

685

854

686

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

855

687

"""

856

properties = {}

688

all = {}

857

689

for name, prop in self._get_all_dbus_properties():

858

690

if (interface_name

859

691

and interface_name != prop._dbus_interface):

864

696

continue

865

697

value = prop()

866

698

if not hasattr(value, "variant_level"):

867

properties[name] = value

699

all[name] = value

868

700

continue

869

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

870

value.variant_level+1)

871

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")

872

704

873

705

@dbus.service.method(dbus.INTROSPECTABLE_IFACE,

874

706

out_signature="s",

925

757

return dbus.String(dt.isoformat(),

926

758

variant_level=variant_level)

927

759

928

929

class AlternateDBusNamesMetaclass(DBusObjectWithProperties

930

.__metaclass__):

931

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

932

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

933

"""

934

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

935

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

936

# methods, signals, or properties in them

937

for base in (b for b in bases

938

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

939

# Go though all attributes of the base class

940

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

941

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

942

# with the wrong interface name

943

if (not hasattr(attribute, "_dbus_interface")

944

or not attribute._dbus_interface

945

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

946

continue

947

# Create an alternate D-Bus interface name based on

948

# the current name

949

alt_interface = (attribute._dbus_interface

950

.replace("se.recompile.Mandos",

951

"se.bsnet.fukt.Mandos"))

952

# Is this a D-Bus signal?

953

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

954

# Extract the original non-method function by

955

# black magic

956

nonmethod_func = (dict(

957

zip(attribute.func_code.co_freevars,

958

attribute.__closure__))["func"]

959

.cell_contents)

960

# Create a new, but exactly alike, function

961

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

962

# with the alternate D-Bus interface name

963

new_function = (dbus.service.signal

964

(alt_interface,

965

attribute._dbus_signature)

966

(types.FunctionType(

967

nonmethod_func.func_code,

968

nonmethod_func.func_globals,

969

nonmethod_func.func_name,

970

nonmethod_func.func_defaults,

971

nonmethod_func.func_closure)))

972

# Define a creator of a function to call both the

973

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

974

# signals gets sent when the function is called

975

def fixscope(func1, func2):

976

"""This function is a scope container to pass

977

func1 and func2 to the "call_both" function

978

outside of its arguments"""

979

def call_both(*args, **kwargs):

980

"""This function will emit two D-Bus

981

signals by calling func1 and func2"""

982

func1(*args, **kwargs)

983

func2(*args, **kwargs)

984

return call_both

985

# Create the "call_both" function and add it to

986

# the class

987

attr[attrname] = fixscope(attribute,

988

new_function)

989

# Is this a D-Bus method?

990

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

991

# Create a new, but exactly alike, function

992

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

993

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

994

# to the class.

995

attr[attrname] = (dbus.service.method

996

(alt_interface,

997

attribute._dbus_in_signature,

998

attribute._dbus_out_signature)

999

(types.FunctionType

1000

(attribute.func_code,

1001

attribute.func_globals,

1002

attribute.func_name,

1003

attribute.func_defaults,

1004

attribute.func_closure)))

1005

# Is this a D-Bus property?

1006

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

1007

# Create a new, but exactly alike, function

1008

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

1009

# property with the alternate D-Bus interface

1010

# name. Add it to the class.

1011

attr[attrname] = (dbus_service_property

1012

(alt_interface,

1013

attribute._dbus_signature,

1014

attribute._dbus_access,

1015

attribute

1016

._dbus_get_args_options

1017

["byte_arrays"])

1018

(types.FunctionType

1019

(attribute.func_code,

1020

attribute.func_globals,

1021

attribute.func_name,

1022

attribute.func_defaults,

1023

attribute.func_closure)))

1024

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

1025

1026

1027

760

class ClientDBus(Client, DBusObjectWithProperties):

1028

761

"""A Client class using D-Bus

1029

762

1038

771

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

1039

772

1040

773

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

774

self._approvals_pending = 0

1041

775

self.bus = bus

1042

776

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

1043

self._approvals_pending = 0

1044

1045

self._approvals_pending = 0

1046

777

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

1047

778

# the D-Bus

1048

779

client_object_name = unicode(self.name).translate(

1056

787

def notifychangeproperty(transform_func,

1057

788

dbus_name, type_func=lambda x: x,

1058

789

variant_level=1):

1059

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

1060

its changes to DBus.

1061

1062

transform_fun: Function that takes a value and a variant_level

1063

and transforms it to a D-Bus type.

1064

dbus_name: D-Bus name of the variable

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

1065

795

type_func: Function that transform the value before sending it

1066

to the D-Bus. Default: no transform

1067

variant_level: D-Bus variant level. Default: 1

796

to DBus

797

variant_level: DBus variant level. default: 1

1068

798

"""

1069

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

799

real_value = [None,]

1070

800

def setter(self, value):

801

old_value = real_value[0]

802

real_value[0] = value

1071

803

if hasattr(self, "dbus_object_path"):

1072

if (not hasattr(self, attrname) or

1073

type_func(getattr(self, attrname, None))

1074

!= type_func(value)):

1075

dbus_value = transform_func(type_func(value),

1076

variant_level

1077

=variant_level)

804

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

805

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

806

variant_level)

1078

807

self.PropertyChanged(dbus.String(dbus_name),

1079

808

dbus_value)

1080

setattr(self, attrname, value)

1081

1082

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

1083

1084

809

810

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

811

812

1085

813

expires = notifychangeproperty(datetime_to_dbus, "Expires")

1086

814

approvals_pending = notifychangeproperty(dbus.Boolean,

1087

815

"ApprovalPending",

1090

818

last_enabled = notifychangeproperty(datetime_to_dbus,

1091

819

"LastEnabled")

1092

820

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

1093

type_func = lambda checker:

1094

checker is not None)

821

type_func = lambda checker: checker is not None)

1095

822

last_checked_ok = notifychangeproperty(datetime_to_dbus,

1096

823

"LastCheckedOK")

1097

last_approval_request = notifychangeproperty(

1098

datetime_to_dbus, "LastApprovalRequest")

824

last_approval_request = notifychangeproperty(datetime_to_dbus,

825

"LastApprovalRequest")

1099

826

approved_by_default = notifychangeproperty(dbus.Boolean,

1100

827

"ApprovedByDefault")

1101

approval_delay = notifychangeproperty(dbus.UInt64,

1102

"ApprovalDelay",

1103

type_func =

1104

timedelta_to_milliseconds)

1105

approval_duration = notifychangeproperty(

1106

dbus.UInt64, "ApprovalDuration",

1107

type_func = timedelta_to_milliseconds)

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)

1108

832

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

1109

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

1110

type_func =

1111

timedelta_to_milliseconds)

1112

extended_timeout = notifychangeproperty(

1113

dbus.UInt64, "ExtendedTimeout",

1114

type_func = timedelta_to_milliseconds)

1115

interval = notifychangeproperty(dbus.UInt64,

1116

"Interval",

1117

type_func =

1118

timedelta_to_milliseconds)

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)

1119

839

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

1120

840

1121

841

del notifychangeproperty

1147

867

1148

868

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

1149

869

*args, **kwargs)

1150

870

1151

871

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

1152

872

old_checker = self.checker

1153

873

if self.checker is not None:

1163

883

return r

1164

884

1165

885

def _reset_approved(self):

1166

self.approved = None

886

self._approved = None

1167

887

return False

1168

888

1169

889

def approve(self, value=True):

1170

890

self.send_changedstate()

1171

self.approved = value

1172

gobject.timeout_add(timedelta_to_milliseconds

891

self._approved = value

892

gobject.timeout_add(_timedelta_to_milliseconds

1173

893

(self.approval_duration),

1174

894

self._reset_approved)

1175

895

1176

896

1177

897

## D-Bus methods, signals & properties

1178

_interface = "se.recompile.Mandos.Client"

898

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

1179

899

1180

900

## Signals

1181

901

1218

938

"D-Bus signal"

1219

939

return self.need_approval()

1220

940

1221

# NeRwequest - signal

1222

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

1223

def NewRequest(self, ip):

1224

"""D-Bus signal

1225

Is sent after a client request a password.

1226

"""

1227

pass

1228

1229

941

## Methods

1230

942

1231

943

# Approve - method

1289

1001

access="readwrite")

1290

1002

def ApprovalDuration_dbus_property(self, value=None):

1291

1003

if value is None: # get

1292

return dbus.UInt64(timedelta_to_milliseconds(

1004

return dbus.UInt64(_timedelta_to_milliseconds(

1293

1005

self.approval_duration))

1294

1006

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

1295

1007

1309

1021

def Host_dbus_property(self, value=None):

1310

1022

if value is None: # get

1311

1023

return dbus.String(self.host)

1312

self.host = unicode(value)

1024

self.host = value

1313

1025

1314

1026

# Created - property

1315

1027

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

1316

1028

def Created_dbus_property(self):

1317

return datetime_to_dbus(self.created)

1029

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

1318

1030

1319

1031

# LastEnabled - property

1320

1032

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

1364

1076

gobject.source_remove(self.disable_initiator_tag)

1365

1077

self.disable_initiator_tag = None

1366

1078

self.expires = None

1367

time_to_die = timedelta_to_milliseconds((self

1368

.last_checked_ok

1369

+ self.timeout)

1370

- datetime.datetime

1371

.utcnow())

1079

time_to_die = (self.

1080

_timedelta_to_milliseconds((self

1081

.last_checked_ok

1082

+ self.timeout)

1083

- datetime.datetime

1084

.utcnow()))

1372

1085

if time_to_die <= 0:

1373

1086

# The timeout has passed

1374

1087

self.disable()

1375

1088

else:

1376

1089

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

1377

+ datetime.timedelta(milliseconds =

1378

time_to_die))

1090

+ datetime.timedelta(milliseconds = time_to_die))

1379

1091

self.disable_initiator_tag = (gobject.timeout_add

1380

1092

(time_to_die, self.disable))

1381

1093

1382

1094

# ExtendedTimeout - property

1383

1095

@dbus_service_property(_interface, signature="t",

1384

1096

access="readwrite")

1386

1098

if value is None: # get

1387

1099

return dbus.UInt64(self.extended_timeout_milliseconds())

1388

1100

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

1389

1101

1390

1102

# Interval - property

1391

1103

@dbus_service_property(_interface, signature="t",

1392

1104

access="readwrite")

1396

1108

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

1397

1109

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

1398

1110

return

1399

if self.enabled:

1400

# Reschedule checker run

1401

gobject.source_remove(self.checker_initiator_tag)

1402

self.checker_initiator_tag = (gobject.timeout_add

1403

(value, self.start_checker))

1404

self.start_checker() # Start one now, too

1405

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

1406

1117

# Checker - property

1407

1118

@dbus_service_property(_interface, signature="s",

1408

1119

access="readwrite")

1409

1120

def Checker_dbus_property(self, value=None):

1410

1121

if value is None: # get

1411

1122

return dbus.String(self.checker_command)

1412

self.checker_command = unicode(value)

1123

self.checker_command = value

1413

1124

1414

1125

# CheckerRunning - property

1415

1126

@dbus_service_property(_interface, signature="b",

1442

1153

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

1443

1154

if not self._pipe.recv():

1444

1155

raise KeyError()

1445

1156

1446

1157

def __getattribute__(self, name):

1447

if name == '_pipe':

1158

if(name == '_pipe'):

1448

1159

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

1449

1160

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

1450

1161

data = self._pipe.recv()

1455

1166

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

1456

1167

return self._pipe.recv()[1]

1457

1168

return func

1458

1169

1459

1170

def __setattr__(self, name, value):

1460

if name == '_pipe':

1171

if(name == '_pipe'):

1461

1172

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

1462

1173

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

1463

1174

1464

1175

1465

class ClientDBusTransitional(ClientDBus):

1466

__metaclass__ = AlternateDBusNamesMetaclass

1467

1468

1469

1176

class ClientHandler(socketserver.BaseRequestHandler, object):

1470

1177

"""A class to handle client connections.

1471

1178

1478

1185

unicode(self.client_address))

1479

1186

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

1480

1187

self.server.child_pipe.fileno())

1481

1188

1482

1189

session = (gnutls.connection

1483

1190

.ClientSession(self.request,

1484

1191

gnutls.connection

1485

1192

.X509Credentials()))

1486

1193

1487

1194

# Note: gnutls.connection.X509Credentials is really a

1488

1195

# generic GnuTLS certificate credentials object so long as

1489

1196

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

1490

1197

# here despite using OpenPGP certificates.

1491

1198

1492

1199

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

1493

1200

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

1494

1201

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

1500

1207

(gnutls.library.functions

1501

1208

.gnutls_priority_set_direct(session._c_object,

1502

1209

priority, None))

1503

1210

1504

1211

# Start communication using the Mandos protocol

1505

1212

# Get protocol number

1506

1213

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

1511

1218

except (ValueError, IndexError, RuntimeError) as error:

1512

1219

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

1513

1220

return

1514

1221

1515

1222

# Start GnuTLS connection

1516

1223

try:

1517

1224

session.handshake()

1521

1228

# established. Just abandon the request.

1522

1229

return

1523

1230

logger.debug("Handshake succeeded")

1524

1231

1525

1232

approval_required = False

1526

1233

try:

1527

1234

try:

1532

1239

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

1533

1240

return

1534

1241

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

1535

1242

1536

1243

try:

1537

1244

client = ProxyClient(child_pipe, fpr,

1538

1245

self.client_address)

1539

1246

except KeyError:

1540

1247

return

1541

1248

1542

if self.server.use_dbus:

1543

# Emit D-Bus signal

1544

client.NewRequest(str(self.client_address))

1545

1546

1249

if client.approval_delay:

1547

1250

delay = client.approval_delay

1548

1251

client.approvals_pending += 1

1554

1257

client.name)

1555

1258

if self.server.use_dbus:

1556

1259

# Emit D-Bus signal

1557

client.Rejected("Disabled")

1260

client.Rejected("Disabled")

1558

1261

return

1559

1262

1560

if client.approved or not client.approval_delay:

1263

if client._approved or not client.approval_delay:

1561

1264

#We are approved or approval is disabled

1562

1265

break

1563

elif client.approved is None:

1266

elif client._approved is None:

1564

1267

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

1565

1268

client.name)

1566

1269

if self.server.use_dbus:

1577

1280

return

1578

1281

1579

1282

#wait until timeout or approved

1283

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

1580

1284

time = datetime.datetime.now()

1581

1285

client.changedstate.acquire()

1582

(client.changedstate.wait

1583

(float(client.timedelta_to_milliseconds(delay)

1584

/ 1000)))

1286

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

1585

1287

client.changedstate.release()

1586

1288

time2 = datetime.datetime.now()

1587

1289

if (time2 - time) >= delay:

1609

1311

sent, len(client.secret)

1610

1312

- (sent_size + sent))

1611

1313

sent_size += sent

1612

1314

1613

1315

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

1614

# bump the timeout using extended_timeout

1316

# bump the timeout as if seen

1615

1317

client.checked_ok(client.extended_timeout)

1616

1318

if self.server.use_dbus:

1617

1319

# Emit D-Bus signal

1685

1387

# Convert the buffer to a Python bytestring

1686

1388

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

1687

1389

# Convert the bytestring to hexadecimal notation

1688

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

1390

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

1689

1391

return hex_fpr

1690

1392

1691

1393

1694

1396

def sub_process_main(self, request, address):

1695

1397

try:

1696

1398

self.finish_request(request, address)

1697

except Exception:

1399

except:

1698

1400

self.handle_error(request, address)

1699

1401

self.close_request(request)

1700

1402

1701

1403

def process_request(self, request, address):

1702

1404

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

1703

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

1704

args = (request,

1705

address))

1706

proc.start()

1707

return proc

1708

1405

multiprocessing.Process(target = self.sub_process_main,

1406

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

1709

1407

1710

1408

class MultiprocessingMixInWithPipe(MultiprocessingMixIn, object):

1711

1409

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

1715

1413

This function creates a new pipe in self.pipe

1716

1414

"""

1717

1415

parent_pipe, self.child_pipe = multiprocessing.Pipe()

1718

1719

proc = MultiprocessingMixIn.process_request(self, request,

1720

client_address)

1416

1417

super(MultiprocessingMixInWithPipe,

1418

self).process_request(request, client_address)

1721

1419

self.child_pipe.close()

1722

self.add_pipe(parent_pipe, proc)

1723

1724

def add_pipe(self, parent_pipe, proc):

1420

self.add_pipe(parent_pipe)

1421

1422

def add_pipe(self, parent_pipe):

1725

1423

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

1726

1424

raise NotImplementedError

1727

1425

1728

1729

1426

class IPv6_TCPServer(MultiprocessingMixInWithPipe,

1730

1427

socketserver.TCPServer, object):

1731

1428

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

1805

1502

self.enabled = False

1806

1503

self.clients = clients

1807

1504

if self.clients is None:

1808

self.clients = {}

1505

self.clients = set()

1809

1506

self.use_dbus = use_dbus

1810

1507

self.gnutls_priority = gnutls_priority

1811

1508

IPv6_TCPServer.__init__(self, server_address,

1815

1512

def server_activate(self):

1816

1513

if self.enabled:

1817

1514

return socketserver.TCPServer.server_activate(self)

1818

1819

1515

def enable(self):

1820

1516

self.enabled = True

1821

1822

def add_pipe(self, parent_pipe, proc):

1517

def add_pipe(self, parent_pipe):

1823

1518

# Call "handle_ipc" for both data and EOF events

1824

1519

gobject.io_add_watch(parent_pipe.fileno(),

1825

1520

gobject.IO_IN | gobject.IO_HUP,

1826

1521

functools.partial(self.handle_ipc,

1827

parent_pipe =

1828

parent_pipe,

1829

proc = proc))

1830

1522

parent_pipe = parent_pipe))

1523

1831

1524

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

1832

proc = None, client_object=None):

1525

client_object=None):

1833

1526

condition_names = {

1834

1527

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

1835

1528

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

1844

1537

for cond, name in

1845

1538

condition_names.iteritems()

1846

1539

if cond & condition)

1847

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

1540

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

1848

1541

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

1849

# Wait for other process to exit

1850

proc.join()

1851

1542

return False

1852

1543

1853

1544

# Read a request from the child

1858

1549

fpr = request[1]

1859

1550

address = request[2]

1860

1551

1861

for c in self.clients.itervalues():

1552

for c in self.clients:

1862

1553

if c.fingerprint == fpr:

1863

1554

client = c

1864

1555

break

1867

1558

"dress: %s", fpr, address)

1868

1559

if self.use_dbus:

1869

1560

# Emit D-Bus signal

1870

mandos_dbus_service.ClientNotFound(fpr,

1871

address[0])

1561

mandos_dbus_service.ClientNotFound(fpr, address[0])

1872

1562

parent_pipe.send(False)

1873

1563

return False

1874

1564

1875

1565

gobject.io_add_watch(parent_pipe.fileno(),

1876

1566

gobject.IO_IN | gobject.IO_HUP,

1877

1567

functools.partial(self.handle_ipc,

1878

parent_pipe =

1879

parent_pipe,

1880

proc = proc,

1881

client_object =

1882

client))

1568

parent_pipe = parent_pipe,

1569

client_object = client))

1883

1570

parent_pipe.send(True)

1884

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

1885

# same fileno

1571

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

1886

1572

return False

1887

1573

if command == 'funcall':

1888

1574

funcname = request[1]

1889

1575

args = request[2]

1890

1576

kwargs = request[3]

1891

1577

1892

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

1893

funcname)(*args,

1894

**kwargs)))

1895

1578

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

1579

1896

1580

if command == 'getattr':

1897

1581

attrname = request[1]

1898

1582

if callable(client_object.__getattribute__(attrname)):

1899

1583

parent_pipe.send(('function',))

1900

1584

else:

1901

parent_pipe.send(('data', client_object

1902

.__getattribute__(attrname)))

1585

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

1903

1586

1904

1587

if command == 'setattr':

1905

1588

attrname = request[1]

1906

1589

value = request[2]

1907

1590

setattr(client_object, attrname, value)

1908

1591

1909

1592

return True

1910

1593

1911

1594

1948

1631

return timevalue

1949

1632

1950

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

1951

1658

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

1952

1659

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

1953

1660

2008

1715

" system bus interface")

2009

1716

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

2010

1717

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

2011

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

2012

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

2013

" state")

2014

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

2015

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

2016

2017

1718

options = parser.parse_args()

2018

1719

2019

1720

if options.check:

2032

1733

"use_dbus": "True",

2033

1734

"use_ipv6": "True",

2034

1735

"debuglevel": "",

2035

"restore": "True",

2036

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

2037

1736

}

2038

1737

2039

1738

# Parse config file for server-global settings

2056

1755

# options, if set.

2057

1756

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

2058

1757

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

2059

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

2060

"statedir"):

1758

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

2061

1759

value = getattr(options, option)

2062

1760

if value is not None:

2063

1761

server_settings[option] = value

2075

1773

debuglevel = server_settings["debuglevel"]

2076

1774

use_dbus = server_settings["use_dbus"]

2077

1775

use_ipv6 = server_settings["use_ipv6"]

2078

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

2079

stored_state_file)

2080

2081

if debug:

2082

initlogger(debug, logging.DEBUG)

2083

else:

2084

if not debuglevel:

2085

initlogger(debug)

2086

else:

2087

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

2088

initlogger(debug, level)

2089

1776

2090

1777

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

2091

1778

syslogger.setFormatter(logging.Formatter

2092

1779

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

2094

1781

% server_settings["servicename"]))

2095

1782

2096

1783

# Parse config file with clients

2097

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)

2098

1793

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

2099

1794

"clients.conf"))

2100

1795

2138

1833

if error[0] != errno.EPERM:

2139

1834

raise error

2140

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

2141

1844

if debug:

2142

1845

# Enable all possible GnuTLS debugging

2143

1846

2157

1860

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

2158

1861

if null > 2:

2159

1862

os.close(null)

1863

else:

1864

# No console logging

1865

logger.removeHandler(console)

2160

1866

2161

1867

# Need to fork before connecting to D-Bus

2162

1868

if not debug:

2163

1869

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

2164

1870

daemon()

2165

1871

2166

gobject.threads_init()

2167

2168

1872

global main_loop

2169

1873

# From the Avahi example code

2170

1874

DBusGMainLoop(set_as_default=True )

2173

1877

# End of Avahi example code

2174

1878

if use_dbus:

2175

1879

try:

2176

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

1880

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

2177

1881

bus, do_not_queue=True)

2178

old_bus_name = (dbus.service.BusName

2179

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

2180

do_not_queue=True))

2181

1882

except dbus.exceptions.NameExistsException as e:

2182

1883

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

2183

1884

use_dbus = False

2184

1885

server_settings["use_dbus"] = False

2185

1886

tcp_server.use_dbus = False

2186

1887

protocol = avahi.PROTO_INET6 if use_ipv6 else avahi.PROTO_INET

2187

service = AvahiServiceToSyslog(name =

2188

server_settings["servicename"],

2189

servicetype = "_mandos._tcp",

2190

protocol = protocol, bus = bus)

1888

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

1889

servicetype = "_mandos._tcp",

1890

protocol = protocol, bus = bus)

2191

1891

if server_settings["interface"]:

2192

1892

service.interface = (if_nametoindex

2193

1893

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

2197

1897

2198

1898

client_class = Client

2199

1899

if use_dbus:

2200

client_class = functools.partial(ClientDBusTransitional,

2201

bus = bus)

2202

2203

client_settings = Client.config_parser(client_config)

2204

old_client_settings = {}

2205

clients_data = {}

2206

2207

# Get client data and settings from last running state.

2208

if server_settings["restore"]:

2209

try:

2210

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

2211

clients_data, old_client_settings = (pickle.load

2212

(stored_state))

2213

os.remove(stored_state_path)

2214

except IOError as e:

2215

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

2216

.format(e))

2217

if e.errno != errno.ENOENT:

2218

raise

2219

except EOFError as e:

2220

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

2221

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

2222

2223

with PGPEngine() as pgp:

2224

for client_name, client in clients_data.iteritems():

2225

# Decide which value to use after restoring saved state.

2226

# We have three different values: Old config file,

2227

# new config file, and saved state.

2228

# New config value takes precedence if it differs from old

2229

# config value, otherwise use saved state.

2230

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

2231

try:

2232

# For each value in new config, check if it

2233

# differs from the old config value (Except for

2234

# the "secret" attribute)

2235

if (name != "secret" and

2236

value != old_client_settings[client_name]

2237

[name]):

2238

client[name] = value

2239

except KeyError:

2240

pass

2241

2242

# Clients who has passed its expire date can still be

2243

# enabled if its last checker was successful. Clients

2244

# whose checker failed before we stored its state is

2245

# assumed to have failed all checkers during downtime.

2246

if client["enabled"]:

2247

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

2248

if not client["last_checked_ok"]:

2249

logger.warning(

2250

"disabling client {0} - Client never "

2251

"performed a successfull checker"

2252

.format(client["name"]))

2253

client["enabled"] = False

2254

elif client["last_checker_status"] != 0:

2255

logger.warning(

2256

"disabling client {0} - Client "

2257

"last checker failed with error code {1}"

2258

.format(client["name"],

2259

client["last_checker_status"]))

2260

client["enabled"] = False

2261

else:

2262

client["expires"] = (datetime.datetime

2263

.utcnow()

2264

+ client["timeout"])

2265

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):

2266

1908

try:

2267

client["secret"] = (

2268

pgp.decrypt(client["encrypted_secret"],

2269

client_settings[client_name]

2270

["secret"]))

2271

except PGPError:

2272

# If decryption fails, we use secret from new settings

2273

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

2274

.format(client_name))

2275

client["secret"] = (

2276

client_settings[client_name]["secret"])

2277

2278

2279

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

2280

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

2281

del clients_data[client_name]

2282

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

2283

clients_data[client_name] = client_settings[client_name]

2284

2285

# Create clients all clients

2286

for client_name, client in clients_data.iteritems():

2287

tcp_server.clients[client_name] = client_class(

2288

name = client_name, settings = client)

2289

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()))

2290

1918

if not tcp_server.clients:

2291

1919

logger.warning("No clients defined")

2292

1920

2303

1931

# "pidfile" was never created

2304

1932

pass

2305

1933

del pidfilename

1934

2306

1935

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

2307

1936

2308

1937

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

2309

1938

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

2310

1939

2313

1942

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

2314

1943

def __init__(self):

2315

1944

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

2316

_interface = "se.recompile.Mandos"

1945

_interface = "se.bsnet.fukt.Mandos"

2317

1946

2318

1947

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

2319

1948

def ClientAdded(self, objpath):

2334

1963

def GetAllClients(self):

2335

1964

"D-Bus method"

2336

1965

return dbus.Array(c.dbus_object_path

2337

for c in

2338

tcp_server.clients.itervalues())

1966

for c in tcp_server.clients)

2339

1967

2340

1968

@dbus.service.method(_interface,

2341

1969

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

2343

1971

"D-Bus method"

2344

1972

return dbus.Dictionary(

2345

1973

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

2346

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

1974

for c in tcp_server.clients),

2347

1975

signature="oa{sv}")

2348

1976

2349

1977

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

2350

1978

def RemoveClient(self, object_path):

2351

1979

"D-Bus method"

2352

for c in tcp_server.clients.itervalues():

1980

for c in tcp_server.clients:

2353

1981

if c.dbus_object_path == object_path:

2354

del tcp_server.clients[c.name]

1982

tcp_server.clients.remove(c)

2355

1983

c.remove_from_connection()

2356

1984

# Don't signal anything except ClientRemoved

2357

1985

c.disable(quiet=True)

2362

1990

2363

1991

del _interface

2364

1992

2365

class MandosDBusServiceTransitional(MandosDBusService):

2366

__metaclass__ = AlternateDBusNamesMetaclass

2367

mandos_dbus_service = MandosDBusServiceTransitional()

1993

mandos_dbus_service = MandosDBusService()

2368

1994

2369

1995

def cleanup():

2370

1996

"Cleanup function; run on exit"

2371

1997

service.cleanup()

2372

1998

2373

multiprocessing.active_children()

2374

if not (tcp_server.clients or client_settings):

2375

return

2376

2377

# Store client before exiting. Secrets are encrypted with key

2378

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

2379

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

2380

clients = {}

2381

with PGPEngine() as pgp:

2382

for client in tcp_server.clients.itervalues():

2383

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

2384

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

2385

key)

2386

client_dict = {}

2387

2388

# A list of attributes that can not be pickled

2389

# + secret.

2390

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

2391

"checker"))

2392

for name, typ in (inspect.getmembers

2393

(dbus.service.Object)):

2394

exclude.add(name)

2395

2396

client_dict["encrypted_secret"] = (client

2397

.encrypted_secret)

2398

for attr in client.client_structure:

2399

if attr not in exclude:

2400

client_dict[attr] = getattr(client, attr)

2401

2402

clients[client.name] = client_dict

2403

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

2404

2405

try:

2406

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

2407

prefix="clients-",

2408

dir=os.path.dirname

2409

(stored_state_path))

2410

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

2411

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

2412

os.rename(tempname, stored_state_path)

2413

except (IOError, OSError) as e:

2414

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

2415

.format(e))

2416

if not debug:

2417

try:

2418

os.remove(tempname)

2419

except NameError:

2420

pass

2421

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

2422

errno.EEXIST)):

2423

raise e

2424

2425

# Delete all clients, and settings from config

2426

1999

while tcp_server.clients:

2427

name, client = tcp_server.clients.popitem()

2000

client = tcp_server.clients.pop()

2428

2001

if use_dbus:

2429

2002

client.remove_from_connection()

2003

client.disable_hook = None

2430

2004

# Don't signal anything except ClientRemoved

2431

2005

client.disable(quiet=True)

2432

2006

if use_dbus:

2433

2007

# Emit D-Bus signal

2434

mandos_dbus_service.ClientRemoved(client

2435

.dbus_object_path,

2008

mandos_dbus_service.ClientRemoved(client.dbus_object_path,

2436

2009

client.name)

2437

client_settings.clear()

2438

2010

2439

2011

atexit.register(cleanup)

2440

2012

2441

for client in tcp_server.clients.itervalues():

2013

for client in tcp_server.clients:

2442

2014

if use_dbus:

2443

2015

# Emit D-Bus signal

2444

2016

mandos_dbus_service.ClientAdded(client.dbus_object_path)

2445

# Need to initiate checking of clients

2446

if client.enabled:

2447

client.init_checker()

2017

client.enable()

2448

2018

2449

2019

tcp_server.enable()

2450

2020

tcp_server.server_activate()