/mandos/trunk : revision 518.2.3

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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@fukt.bsnet.se>.

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

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#

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34

from __future__ import (division, absolute_import, print_function,

62

import functools

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import cPickle as pickle

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import multiprocessing

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import types

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import binascii

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import tempfile

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68

66

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import dbus

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import dbus.service

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75

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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79

76

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try:

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SO_BINDTODEVICE = socket.SO_BINDTODEVICE

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86

SO_BINDTODEVICE = None

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87

84

88

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version = "1.3.0"

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version = "1.4.1"

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stored_state_file = "clients.pickle"

86

91

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#logger = logging.getLogger('mandos')

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logger = logging.Logger('mandos')

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logger = logging.getLogger()

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syslogger = (logging.handlers.SysLogHandler

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(facility = logging.handlers.SysLogHandler.LOG_DAEMON,

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

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syslogger.setFormatter(logging.Formatter

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

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' %(message)s'))

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logger.addHandler(syslogger)

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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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97

try:

98

if_nametoindex = (ctypes.cdll.LoadLibrary

99

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

100

.if_nametoindex)

101

except (OSError, AttributeError):

102

def if_nametoindex(interface):

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

104

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

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

106

ifreq = fcntl.ioctl(s, SIOCGIFINDEX,

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

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interface))

109

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

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ifreq[16:20])[0]

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return interface_index

112

113

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def initlogger(level=logging.WARNING):

115

"""init logger and add loglevel"""

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syslogger.setFormatter(logging.Formatter

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

119

' %(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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130

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class CryptoError(Exception):

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pass

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134

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class Crypto(object):

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

137

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'])

145

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def __enter__(self):

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return self

148

149

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

150

self._cleanup()

151

return False

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153

def __del__(self):

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self._cleanup()

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156

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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174

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:

177

try:

178

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

179

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

180

attach_fhs={'stderr': devnull})

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

182

f.write(data)

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

184

ciphertext = f.read()

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proc.wait()

186

except IOError as e:

187

raise CryptoError(e)

188

self.gnupg.passphrase = None

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return ciphertext

190

191

def decrypt(self, data, password):

192

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

193

with open(os.devnull) as devnull:

194

try:

195

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

196

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

197

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()

202

proc.wait()

203

except IOError as e:

204

raise CryptoError(e)

205

self.gnupg.passphrase = None

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return decrypted_plaintext

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class AvahiError(Exception):

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211

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

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266

" after %i retries, exiting.",

160

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self.rename_count)

161

268

raise AvahiServiceError("Too many renames")

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

269

self.name = unicode(self.server

270

.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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self.remove()

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try:

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self.add()

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295

avahi.DBUS_INTERFACE_ENTRY_GROUP)

192

296

self.entry_group_state_changed_match = (

193

297

self.group.connect_to_signal(

194

'StateChanged', self .entry_group_state_changed))

298

'StateChanged', self.entry_group_state_changed))

195

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

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self.name, self.type)

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301

self.group.AddService(

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327

try:

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328

self.group.Free()

225

329

except (dbus.exceptions.UnknownMethodException,

226

dbus.exceptions.DBusException) as e:

330

dbus.exceptions.DBusException):

227

331

pass

228

332

self.group = None

229

333

self.remove()

263

367

self.server_state_changed)

264

368

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

265

369

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]:'

376

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

377

% self.name))

378

return ret

266

379

380

def _timedelta_to_milliseconds(td):

381

"Convert a datetime.timedelta() to milliseconds"

382

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

383

+ (td.seconds * 1000)

384

+ (td.microseconds // 1000))

385

267

386

class Client(object):

268

387

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

269

388

281

400

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

282

401

checker_initiator_tag: a gobject event source tag, or None

283

402

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

403

client_structure: Object describing what attributes a client has

404

and is used for storing the client at exit

284

405

current_checker_command: string; current running checker_command

285

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

286

406

disable_initiator_tag: a gobject event source tag, or None

287

407

enabled: bool()

288

408

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

291

411

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

292

412

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

293

413

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

294

last_enabled: datetime.datetime(); (UTC)

414

415

last_checker_status: integer between 0 and 255 reflecting exit

416

status of last checker. -1 reflects crashed

417

checker, or None.

418

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

295

419

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

296

420

D-Bus identifiers

297

421

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

298

422

timeout: datetime.timedelta(); How long from last_checked_ok

299

423

until this client is disabled

424

extended_timeout: extra long timeout when password has been sent

300

425

runtime_expansions: Allowed attributes for runtime expansion.

426

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

427

disabled, or None

301

428

"""

302

429

303

430

runtime_expansions = ("approval_delay", "approval_duration",

305

432

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

306

433

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

307

434

308

@staticmethod

309

def _timedelta_to_milliseconds(td):

310

"Convert a datetime.timedelta() to milliseconds"

311

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

312

+ (td.seconds * 1000)

313

+ (td.microseconds // 1000))

314

315

435

def timeout_milliseconds(self):

316

436

"Return the 'timeout' attribute in milliseconds"

317

return self._timedelta_to_milliseconds(self.timeout)

437

return _timedelta_to_milliseconds(self.timeout)

438

439

def extended_timeout_milliseconds(self):

440

"Return the 'extended_timeout' attribute in milliseconds"

441

return _timedelta_to_milliseconds(self.extended_timeout)

318

442

319

443

def interval_milliseconds(self):

320

444

"Return the 'interval' attribute in milliseconds"

321

return self._timedelta_to_milliseconds(self.interval)

322

445

return _timedelta_to_milliseconds(self.interval)

446

323

447

def approval_delay_milliseconds(self):

324

return self._timedelta_to_milliseconds(self.approval_delay)

448

return _timedelta_to_milliseconds(self.approval_delay)

325

449

326

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

450

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

327

451

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

328

452

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

329

453

attribute."""

349

473

% self.name)

350

474

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

351

475

self.created = datetime.datetime.utcnow()

352

self.enabled = False

476

self.enabled = config.get("enabled", True)

353

477

self.last_approval_request = None

354

self.last_enabled = None

478

if self.enabled:

479

self.last_enabled = datetime.datetime.utcnow()

480

else:

481

self.last_enabled = None

355

482

self.last_checked_ok = None

483

self.last_checker_status = None

356

484

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

485

self.extended_timeout = string_to_delta(config

486

["extended_timeout"])

357

487

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

358

self.disable_hook = disable_hook

359

488

self.checker = None

360

489

self.checker_initiator_tag = None

361

490

self.disable_initiator_tag = None

491

if self.enabled:

492

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

493

else:

494

self.expires = None

362

495

self.checker_callback_tag = None

363

496

self.checker_command = config["checker"]

364

497

self.current_checker_command = None

365

self.last_connect = None

366

498

self._approved = None

367

499

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

368

500

True)

371

503

config["approval_delay"])

372

504

self.approval_duration = string_to_delta(

373

505

config["approval_duration"])

374

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

506

self.changedstate = (multiprocessing_manager

507

.Condition(multiprocessing_manager

508

.Lock()))

509

self.client_structure = [attr for attr in

510

self.__dict__.iterkeys()

511

if not attr.startswith("_")]

512

self.client_structure.append("client_structure")

513

514

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

515

lambda obj:

516

isinstance(obj,

517

property)):

518

if not name.startswith("_"):

519

self.client_structure.append(name)

375

520

521

# Send notice to process children that client state has changed

376

522

def send_changedstate(self):

377

self.changedstate.acquire()

378

self.changedstate.notify_all()

379

self.changedstate.release()

380

523

with self.changedstate:

524

self.changedstate.notify_all()

525

381

526

def enable(self):

382

527

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

383

528

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

384

529

# Already enabled

385

530

return

386

531

self.send_changedstate()

532

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

533

self.enabled = True

387

534

self.last_enabled = datetime.datetime.utcnow()

388

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

389

# and every interval from then on.

390

self.checker_initiator_tag = (gobject.timeout_add

391

(self.interval_milliseconds(),

392

self.start_checker))

393

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

394

self.disable_initiator_tag = (gobject.timeout_add

395

(self.timeout_milliseconds(),

396

self.disable))

397

self.enabled = True

398

# Also start a new checker *right now*.

399

self.start_checker()

535

self.init_checker()

400

536

401

537

def disable(self, quiet=True):

402

538

"""Disable this client."""

409

545

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

410

546

gobject.source_remove(self.disable_initiator_tag)

411

547

self.disable_initiator_tag = None

548

self.expires = None

412

549

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

413

550

gobject.source_remove(self.checker_initiator_tag)

414

551

self.checker_initiator_tag = None

415

552

self.stop_checker()

416

if self.disable_hook:

417

self.disable_hook(self)

418

553

self.enabled = False

419

554

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

420

555

return False

421

556

422

557

def __del__(self):

423

self.disable_hook = None

424

558

self.disable()

425

559

560

def init_checker(self):

561

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

562

# and every interval from then on.

563

self.checker_initiator_tag = (gobject.timeout_add

564

(self.interval_milliseconds(),

565

self.start_checker))

566

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

567

self.disable_initiator_tag = (gobject.timeout_add

568

(self.timeout_milliseconds(),

569

self.disable))

570

# Also start a new checker *right now*.

571

self.start_checker()

572

426

573

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

427

574

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

428

575

self.checker_callback_tag = None

429

576

self.checker = None

430

577

if os.WIFEXITED(condition):

431

exitstatus = os.WEXITSTATUS(condition)

432

if exitstatus == 0:

578

self.last_checker_status = os.WEXITSTATUS(condition)

579

if self.last_checker_status == 0:

433

580

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

434

581

vars(self))

435

582

self.checked_ok()

437

584

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

438

585

vars(self))

439

586

else:

587

self.last_checker_status = -1

440

588

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

441

589

vars(self))

442

590

443

def checked_ok(self):

591

def checked_ok(self, timeout=None):

444

592

"""Bump up the timeout for this client.

445

593

446

594

This should only be called when the client has been seen,

447

595

alive and well.

448

596

"""

597

if timeout is None:

598

timeout = self.timeout

449

599

self.last_checked_ok = datetime.datetime.utcnow()

450

gobject.source_remove(self.disable_initiator_tag)

451

self.disable_initiator_tag = (gobject.timeout_add

452

(self.timeout_milliseconds(),

453

self.disable))

600

if self.disable_initiator_tag is not None:

601

gobject.source_remove(self.disable_initiator_tag)

602

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

603

self.disable_initiator_tag = (gobject.timeout_add

604

(_timedelta_to_milliseconds

605

(timeout), self.disable))

606

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

454

607

455

608

def need_approval(self):

456

609

self.last_approval_request = datetime.datetime.utcnow()

496

649

'replace')))

497

650

for attr in

498

651

self.runtime_expansions)

499

652

500

653

try:

501

654

command = self.checker_command % escaped_attrs

502

655

except TypeError as error:

548

701

raise

549

702

self.checker = None

550

703

704

551

705

def dbus_service_property(dbus_interface, signature="v",

552

706

access="readwrite", byte_arrays=False):

553

707

"""Decorators for marking methods of a DBusObjectWithProperties to

599

753

600

754

class DBusObjectWithProperties(dbus.service.Object):

601

755

"""A D-Bus object with properties.

602

756

603

757

Classes inheriting from this can use the dbus_service_property

604

758

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

605

759

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

612

766

def _get_all_dbus_properties(self):

613

767

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

614

768

"""

615

return ((prop._dbus_name, prop)

769

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

770

for cls in self.__class__.__mro__

616

771

for name, prop in

617

inspect.getmembers(self, self._is_dbus_property))

772

inspect.getmembers(cls, self._is_dbus_property))

618

773

619

774

def _get_dbus_property(self, interface_name, property_name):

620

775

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

621

776

property with the specified name and interface.

622

777

"""

623

for name in (property_name,

624

property_name + "_dbus_property"):

625

prop = getattr(self, name, None)

626

if (prop is None

627

or not self._is_dbus_property(prop)

628

or prop._dbus_name != property_name

629

or (interface_name and prop._dbus_interface

630

and interface_name != prop._dbus_interface)):

631

continue

632

return prop

778

for cls in self.__class__.__mro__:

779

for name, value in (inspect.getmembers

780

(cls, self._is_dbus_property)):

781

if (value._dbus_name == property_name

782

and value._dbus_interface == interface_name):

783

return value.__get__(self)

784

633

785

# No such property

634

786

raise DBusPropertyNotFound(self.dbus_object_path + ":"

635

787

+ interface_name + "."

669

821

def GetAll(self, interface_name):

670

822

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

671

823

standard.

672

824

673

825

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

674

826

"""

675

all = {}

827

properties = {}

676

828

for name, prop in self._get_all_dbus_properties():

677

829

if (interface_name

678

830

and interface_name != prop._dbus_interface):

683

835

continue

684

836

value = prop()

685

837

if not hasattr(value, "variant_level"):

686

all[name] = value

838

properties[name] = value

687

839

continue

688

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

689

value.variant_level+1)

690

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

840

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

841

value.variant_level+1)

842

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

691

843

692

844

@dbus.service.method(dbus.INTROSPECTABLE_IFACE,

693

845

out_signature="s",

737

889

return xmlstring

738

890

739

891

892

def datetime_to_dbus (dt, variant_level=0):

893

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

894

if dt is None:

895

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

896

return dbus.String(dt.isoformat(),

897

variant_level=variant_level)

898

899

900

class AlternateDBusNamesMetaclass(DBusObjectWithProperties

901

.__metaclass__):

902

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

903

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

904

"""

905

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

906

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

907

# methods, signals, or properties in them

908

for base in (b for b in bases

909

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

910

# Go though all attributes of the base class

911

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

912

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

913

# with the wrong interface name

914

if (not hasattr(attribute, "_dbus_interface")

915

or not attribute._dbus_interface

916

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

917

continue

918

# Create an alternate D-Bus interface name based on

919

# the current name

920

alt_interface = (attribute._dbus_interface

921

.replace("se.recompile.Mandos",

922

"se.bsnet.fukt.Mandos"))

923

# Is this a D-Bus signal?

924

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

925

# Extract the original non-method function by

926

# black magic

927

nonmethod_func = (dict(

928

zip(attribute.func_code.co_freevars,

929

attribute.__closure__))["func"]

930

.cell_contents)

931

# Create a new, but exactly alike, function

932

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

933

# with the alternate D-Bus interface name

934

new_function = (dbus.service.signal

935

(alt_interface,

936

attribute._dbus_signature)

937

(types.FunctionType(

938

nonmethod_func.func_code,

939

nonmethod_func.func_globals,

940

nonmethod_func.func_name,

941

nonmethod_func.func_defaults,

942

nonmethod_func.func_closure)))

943

# Define a creator of a function to call both the

944

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

945

# signals gets sent when the function is called

946

def fixscope(func1, func2):

947

"""This function is a scope container to pass

948

func1 and func2 to the "call_both" function

949

outside of its arguments"""

950

def call_both(*args, **kwargs):

951

"""This function will emit two D-Bus

952

signals by calling func1 and func2"""

953

func1(*args, **kwargs)

954

func2(*args, **kwargs)

955

return call_both

956

# Create the "call_both" function and add it to

957

# the class

958

attr[attrname] = fixscope(attribute,

959

new_function)

960

# Is this a D-Bus method?

961

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

962

# Create a new, but exactly alike, function

963

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

964

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

965

# to the class.

966

attr[attrname] = (dbus.service.method

967

(alt_interface,

968

attribute._dbus_in_signature,

969

attribute._dbus_out_signature)

970

(types.FunctionType

971

(attribute.func_code,

972

attribute.func_globals,

973

attribute.func_name,

974

attribute.func_defaults,

975

attribute.func_closure)))

976

# Is this a D-Bus property?

977

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

978

# Create a new, but exactly alike, function

979

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

980

# property with the alternate D-Bus interface

981

# name. Add it to the class.

982

attr[attrname] = (dbus_service_property

983

(alt_interface,

984

attribute._dbus_signature,

985

attribute._dbus_access,

986

attribute

987

._dbus_get_args_options

988

["byte_arrays"])

989

(types.FunctionType

990

(attribute.func_code,

991

attribute.func_globals,

992

attribute.func_name,

993

attribute.func_defaults,

994

attribute.func_closure)))

995

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

996

997

740

998

class ClientDBus(Client, DBusObjectWithProperties):

741

999

"""A Client class using D-Bus

742

1000

751

1009

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

752

1010

753

1011

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

1012

self.bus = bus

1013

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

1014

754

1015

self._approvals_pending = 0

755

self.bus = bus

756

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

757

1016

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

758

1017

# the D-Bus

759

1018

client_object_name = unicode(self.name).translate(

764

1023

DBusObjectWithProperties.__init__(self, self.bus,

765

1024

self.dbus_object_path)

766

1025

767

def _get_approvals_pending(self):

768

return self._approvals_pending

769

def _set_approvals_pending(self, value):

770

old_value = self._approvals_pending

771

self._approvals_pending = value

772

bval = bool(value)

773

if (hasattr(self, "dbus_object_path")

774

and bval is not bool(old_value)):

775

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

776

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

777

dbus_bool)

778

779

approvals_pending = property(_get_approvals_pending,

780

_set_approvals_pending)

781

del _get_approvals_pending, _set_approvals_pending

782

783

@staticmethod

784

def _datetime_to_dbus(dt, variant_level=0):

785

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

786

return dbus.String(dt.isoformat(),

787

variant_level=variant_level)

788

789

def enable(self):

790

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

791

r = Client.enable(self)

792

if oldstate != self.enabled:

793

# Emit D-Bus signals

794

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

795

dbus.Boolean(True, variant_level=1))

796

self.PropertyChanged(

797

dbus.String("LastEnabled"),

798

self._datetime_to_dbus(self.last_enabled,

799

variant_level=1))

800

return r

801

802

def disable(self, quiet = False):

803

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

804

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

805

if not quiet and oldstate != self.enabled:

806

# Emit D-Bus signal

807

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

808

dbus.Boolean(False, variant_level=1))

809

return r

1026

def notifychangeproperty(transform_func,

1027

dbus_name, type_func=lambda x: x,

1028

variant_level=1):

1029

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

1030

its changes to DBus.

1031

1032

transform_fun: Function that takes a value and a variant_level

1033

and transforms it to a D-Bus type.

1034

dbus_name: D-Bus name of the variable

1035

type_func: Function that transform the value before sending it

1036

to the D-Bus. Default: no transform

1037

variant_level: D-Bus variant level. Default: 1

1038

"""

1039

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

1040

def setter(self, value):

1041

if hasattr(self, "dbus_object_path"):

1042

if (not hasattr(self, attrname) or

1043

type_func(getattr(self, attrname, None))

1044

!= type_func(value)):

1045

dbus_value = transform_func(type_func(value),

1046

variant_level

1047

=variant_level)

1048

self.PropertyChanged(dbus.String(dbus_name),

1049

dbus_value)

1050

setattr(self, attrname, value)

1051

1052

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

1053

1054

1055

expires = notifychangeproperty(datetime_to_dbus, "Expires")

1056

approvals_pending = notifychangeproperty(dbus.Boolean,

1057

"ApprovalPending",

1058

type_func = bool)

1059

enabled = notifychangeproperty(dbus.Boolean, "Enabled")

1060

last_enabled = notifychangeproperty(datetime_to_dbus,

1061

"LastEnabled")

1062

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

1063

type_func = lambda checker:

1064

checker is not None)

1065

last_checked_ok = notifychangeproperty(datetime_to_dbus,

1066

"LastCheckedOK")

1067

last_approval_request = notifychangeproperty(

1068

datetime_to_dbus, "LastApprovalRequest")

1069

approved_by_default = notifychangeproperty(dbus.Boolean,

1070

"ApprovedByDefault")

1071

approval_delay = notifychangeproperty(dbus.UInt16,

1072

"ApprovalDelay",

1073

type_func =

1074

_timedelta_to_milliseconds)

1075

approval_duration = notifychangeproperty(

1076

dbus.UInt16, "ApprovalDuration",

1077

type_func = _timedelta_to_milliseconds)

1078

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

1079

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

1080

type_func =

1081

_timedelta_to_milliseconds)

1082

extended_timeout = notifychangeproperty(

1083

dbus.UInt16, "ExtendedTimeout",

1084

type_func = _timedelta_to_milliseconds)

1085

interval = notifychangeproperty(dbus.UInt16,

1086

"Interval",

1087

type_func =

1088

_timedelta_to_milliseconds)

1089

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

1090

1091

del notifychangeproperty

810

1092

811

1093

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

812

1094

try:

821

1103

*args, **kwargs):

822

1104

self.checker_callback_tag = None

823

1105

self.checker = None

824

# Emit D-Bus signal

825

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

826

dbus.Boolean(False, variant_level=1))

827

1106

if os.WIFEXITED(condition):

828

1107

exitstatus = os.WEXITSTATUS(condition)

829

1108

# Emit D-Bus signal

839

1118

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

840

1119

*args, **kwargs)

841

1120

842

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

843

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

844

# Emit D-Bus signal

845

self.PropertyChanged(

846

dbus.String("LastCheckedOK"),

847

(self._datetime_to_dbus(self.last_checked_ok,

848

variant_level=1)))

849

850

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

851

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

852

# Emit D-Bus signal

853

self.PropertyChanged(

854

dbus.String("LastApprovalRequest"),

855

(self._datetime_to_dbus(self.last_approval_request,

856

variant_level=1)))

857

return r

858

859

1121

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

860

1122

old_checker = self.checker

861

1123

if self.checker is not None:

868

1130

and old_checker_pid != self.checker.pid):

869

1131

# Emit D-Bus signal

870

1132

self.CheckerStarted(self.current_checker_command)

871

self.PropertyChanged(

872

dbus.String("CheckerRunning"),

873

dbus.Boolean(True, variant_level=1))

874

1133

return r

875

1134

876

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

877

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

878

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

879

if (old_checker is not None

880

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

881

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

882

dbus.Boolean(False, variant_level=1))

883

return r

884

885

1135

def _reset_approved(self):

886

1136

self._approved = None

887

1137

return False

889

1139

def approve(self, value=True):

890

1140

self.send_changedstate()

891

1141

self._approved = value

892

gobject.timeout_add(self._timedelta_to_milliseconds

1142

gobject.timeout_add(_timedelta_to_milliseconds

893

1143

(self.approval_duration),

894

1144

self._reset_approved)

895

1145

896

1146

897

1147

## D-Bus methods, signals & properties

898

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

1148

_interface = "se.recompile.Mandos.Client"

899

1149

900

1150

## Signals

901

1151

938

1188

"D-Bus signal"

939

1189

return self.need_approval()

940

1190

1191

# NeRwequest - signal

1192

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

1193

def NewRequest(self, ip):

1194

"""D-Bus signal

1195

Is sent after a client request a password.

1196

"""

1197

pass

1198

941

1199

## Methods

942

1200

943

1201

# Approve - method

987

1245

if value is None: # get

988

1246

return dbus.Boolean(self.approved_by_default)

989

1247

self.approved_by_default = bool(value)

990

# Emit D-Bus signal

991

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

992

dbus.Boolean(value, variant_level=1))

993

1248

994

1249

# ApprovalDelay - property

995

1250

@dbus_service_property(_interface, signature="t",

998

1253

if value is None: # get

999

1254

return dbus.UInt64(self.approval_delay_milliseconds())

1000

1255

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

1001

# Emit D-Bus signal

1002

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

1003

dbus.UInt64(value, variant_level=1))

1004

1256

1005

1257

# ApprovalDuration - property

1006

1258

@dbus_service_property(_interface, signature="t",

1007

1259

access="readwrite")

1008

1260

def ApprovalDuration_dbus_property(self, value=None):

1009

1261

if value is None: # get

1010

return dbus.UInt64(self._timedelta_to_milliseconds(

1262

return dbus.UInt64(_timedelta_to_milliseconds(

1011

1263

self.approval_duration))

1012

1264

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

1013

# Emit D-Bus signal

1014

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

1015

dbus.UInt64(value, variant_level=1))

1016

1265

1017

1266

# Name - property

1018

1267

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

1031

1280

if value is None: # get

1032

1281

return dbus.String(self.host)

1033

1282

self.host = value

1034

# Emit D-Bus signal

1035

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

1036

dbus.String(value, variant_level=1))

1037

1283

1038

1284

# Created - property

1039

1285

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

1040

1286

def Created_dbus_property(self):

1041

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

1287

return datetime_to_dbus(self.created)

1042

1288

1043

1289

# LastEnabled - property

1044

1290

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

1045

1291

def LastEnabled_dbus_property(self):

1046

if self.last_enabled is None:

1047

return dbus.String("")

1048

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

1292

return datetime_to_dbus(self.last_enabled)

1049

1293

1050

1294

# Enabled - property

1051

1295

@dbus_service_property(_interface, signature="b",

1065

1309

if value is not None:

1066

1310

self.checked_ok()

1067

1311

return

1068

if self.last_checked_ok is None:

1069

return dbus.String("")

1070

return dbus.String(self._datetime_to_dbus(self

1071

.last_checked_ok))

1312

return datetime_to_dbus(self.last_checked_ok)

1313

1314

# Expires - property

1315

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

1316

def Expires_dbus_property(self):

1317

return datetime_to_dbus(self.expires)

1072

1318

1073

1319

# LastApprovalRequest - property

1074

1320

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

1075

1321

def LastApprovalRequest_dbus_property(self):

1076

if self.last_approval_request is None:

1077

return dbus.String("")

1078

return dbus.String(self.

1079

_datetime_to_dbus(self

1080

.last_approval_request))

1322

return datetime_to_dbus(self.last_approval_request)

1081

1323

1082

1324

# Timeout - property

1083

1325

@dbus_service_property(_interface, signature="t",

1086

1328

if value is None: # get

1087

1329

return dbus.UInt64(self.timeout_milliseconds())

1088

1330

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

1089

# Emit D-Bus signal

1090

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

1091

dbus.UInt64(value, variant_level=1))

1092

1331

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

1093

1332

return

1094

1333

# Reschedule timeout

1095

1334

gobject.source_remove(self.disable_initiator_tag)

1096

1335

self.disable_initiator_tag = None

1097

time_to_die = (self.

1098

_timedelta_to_milliseconds((self

1099

.last_checked_ok

1100

+ self.timeout)

1101

- datetime.datetime

1102

.utcnow()))

1336

self.expires = None

1337

time_to_die = _timedelta_to_milliseconds((self

1338

.last_checked_ok

1339

+ self.timeout)

1340

- datetime.datetime

1341

.utcnow())

1103

1342

if time_to_die <= 0:

1104

1343

# The timeout has passed

1105

1344

self.disable()

1106

1345

else:

1346

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

1347

+ datetime.timedelta(milliseconds =

1348

time_to_die))

1107

1349

self.disable_initiator_tag = (gobject.timeout_add

1108

1350

(time_to_die, self.disable))

1109

1351

1352

# ExtendedTimeout - property

1353

@dbus_service_property(_interface, signature="t",

1354

access="readwrite")

1355

def ExtendedTimeout_dbus_property(self, value=None):

1356

if value is None: # get

1357

return dbus.UInt64(self.extended_timeout_milliseconds())

1358

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

1359

1110

1360

# Interval - property

1111

1361

@dbus_service_property(_interface, signature="t",

1112

1362

access="readwrite")

1114

1364

if value is None: # get

1115

1365

return dbus.UInt64(self.interval_milliseconds())

1116

1366

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

1117

# Emit D-Bus signal

1118

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

1119

dbus.UInt64(value, variant_level=1))

1120

1367

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

1121

1368

return

1122

# Reschedule checker run

1123

gobject.source_remove(self.checker_initiator_tag)

1124

self.checker_initiator_tag = (gobject.timeout_add

1125

(value, self.start_checker))

1126

self.start_checker() # Start one now, too

1127

1369

if self.enabled:

1370

# Reschedule checker run

1371

gobject.source_remove(self.checker_initiator_tag)

1372

self.checker_initiator_tag = (gobject.timeout_add

1373

(value, self.start_checker))

1374

self.start_checker() # Start one now, too

1375

1128

1376

# Checker - property

1129

1377

@dbus_service_property(_interface, signature="s",

1130

1378

access="readwrite")

1132

1380

if value is None: # get

1133

1381

return dbus.String(self.checker_command)

1134

1382

self.checker_command = value

1135

# Emit D-Bus signal

1136

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

1137

dbus.String(self.checker_command,

1138

variant_level=1))

1139

1383

1140

1384

# CheckerRunning - property

1141

1385

@dbus_service_property(_interface, signature="b",

1168

1412

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

1169

1413

if not self._pipe.recv():

1170

1414

raise KeyError()

1171

1415

1172

1416

def __getattribute__(self, name):

1173

1417

if(name == '_pipe'):

1174

1418

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

1181

1425

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

1182

1426

return self._pipe.recv()[1]

1183

1427

return func

1184

1428

1185

1429

def __setattr__(self, name, value):

1186

1430

if(name == '_pipe'):

1187

1431

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

1188

1432

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

1189

1433

1190

1434

1435

class ClientDBusTransitional(ClientDBus):

1436

__metaclass__ = AlternateDBusNamesMetaclass

1437

1438

1191

1439

class ClientHandler(socketserver.BaseRequestHandler, object):

1192

1440

"""A class to handle client connections.

1193

1441

1200

1448

unicode(self.client_address))

1201

1449

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

1202

1450

self.server.child_pipe.fileno())

1203

1451

1204

1452

session = (gnutls.connection

1205

1453

.ClientSession(self.request,

1206

1454

gnutls.connection

1207

1455

.X509Credentials()))

1208

1456

1209

1457

# Note: gnutls.connection.X509Credentials is really a

1210

1458

# generic GnuTLS certificate credentials object so long as

1211

1459

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

1212

1460

# here despite using OpenPGP certificates.

1213

1461

1214

1462

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

1215

1463

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

1216

1464

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

1222

1470

(gnutls.library.functions

1223

1471

.gnutls_priority_set_direct(session._c_object,

1224

1472

priority, None))

1225

1473

1226

1474

# Start communication using the Mandos protocol

1227

1475

# Get protocol number

1228

1476

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

1233

1481

except (ValueError, IndexError, RuntimeError) as error:

1234

1482

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

1235

1483

return

1236

1484

1237

1485

# Start GnuTLS connection

1238

1486

try:

1239

1487

session.handshake()

1243

1491

# established. Just abandon the request.

1244

1492

return

1245

1493

logger.debug("Handshake succeeded")

1246

1494

1247

1495

approval_required = False

1248

1496

try:

1249

1497

try:

1254

1502

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

1255

1503

return

1256

1504

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

1257

1505

if self.server.use_dbus:

1506

# Emit D-Bus signal

1507

client.NewRequest(str(self.client_address))

1508

1258

1509

try:

1259

1510

client = ProxyClient(child_pipe, fpr,

1260

1511

self.client_address)

1272

1523

client.name)

1273

1524

if self.server.use_dbus:

1274

1525

# Emit D-Bus signal

1275

client.Rejected("Disabled")

1526

client.Rejected("Disabled")

1276

1527

return

1277

1528

1278

1529

if client._approved or not client.approval_delay:

1295

1546

return

1296

1547

1297

1548

#wait until timeout or approved

1298

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

1299

1549

time = datetime.datetime.now()

1300

1550

client.changedstate.acquire()

1301

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

1551

(client.changedstate.wait

1552

(float(client._timedelta_to_milliseconds(delay)

1553

/ 1000)))

1302

1554

client.changedstate.release()

1303

1555

time2 = datetime.datetime.now()

1304

1556

if (time2 - time) >= delay:

1326

1578

sent, len(client.secret)

1327

1579

- (sent_size + sent))

1328

1580

sent_size += sent

1329

1581

1330

1582

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

1331

# bump the timeout as if seen

1332

client.checked_ok()

1583

# bump the timeout using extended_timeout

1584

client.checked_ok(client.extended_timeout)

1333

1585

if self.server.use_dbus:

1334

1586

# Emit D-Bus signal

1335

1587

client.GotSecret()

1402

1654

# Convert the buffer to a Python bytestring

1403

1655

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

1404

1656

# Convert the bytestring to hexadecimal notation

1405

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

1657

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

1406

1658

return hex_fpr

1407

1659

1408

1660

1414

1666

except:

1415

1667

self.handle_error(request, address)

1416

1668

self.close_request(request)

1417

1669

1418

1670

def process_request(self, request, address):

1419

1671

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

1420

multiprocessing.Process(target = self.sub_process_main,

1421

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

1672

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

1673

args = (request,

1674

address))

1675

proc.start()

1676

return proc

1677

1422

1678

1423

1679

class MultiprocessingMixInWithPipe(MultiprocessingMixIn, object):

1424

1680

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

1428

1684

This function creates a new pipe in self.pipe

1429

1685

"""

1430

1686

parent_pipe, self.child_pipe = multiprocessing.Pipe()

1431

1432

super(MultiprocessingMixInWithPipe,

1433

self).process_request(request, client_address)

1687

1688

proc = MultiprocessingMixIn.process_request(self, request,

1689

client_address)

1434

1690

self.child_pipe.close()

1435

self.add_pipe(parent_pipe)

1436

1437

def add_pipe(self, parent_pipe):

1691

self.add_pipe(parent_pipe, proc)

1692

1693

def add_pipe(self, parent_pipe, proc):

1438

1694

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

1439

1695

raise NotImplementedError

1440

1696

1697

1441

1698

class IPv6_TCPServer(MultiprocessingMixInWithPipe,

1442

1699

socketserver.TCPServer, object):

1443

1700

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

1517

1774

self.enabled = False

1518

1775

self.clients = clients

1519

1776

if self.clients is None:

1520

self.clients = set()

1777

self.clients = {}

1521

1778

self.use_dbus = use_dbus

1522

1779

self.gnutls_priority = gnutls_priority

1523

1780

IPv6_TCPServer.__init__(self, server_address,

1527

1784

def server_activate(self):

1528

1785

if self.enabled:

1529

1786

return socketserver.TCPServer.server_activate(self)

1787

1530

1788

def enable(self):

1531

1789

self.enabled = True

1532

def add_pipe(self, parent_pipe):

1790

1791

def add_pipe(self, parent_pipe, proc):

1533

1792

# Call "handle_ipc" for both data and EOF events

1534

1793

gobject.io_add_watch(parent_pipe.fileno(),

1535

1794

gobject.IO_IN | gobject.IO_HUP,

1536

1795

functools.partial(self.handle_ipc,

1537

parent_pipe = parent_pipe))

1538

1796

parent_pipe =

1797

parent_pipe,

1798

proc = proc))

1799

1539

1800

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

1540

client_object=None):

1801

proc = None, client_object=None):

1541

1802

condition_names = {

1542

1803

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

1543

1804

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

1552

1813

for cond, name in

1553

1814

condition_names.iteritems()

1554

1815

if cond & condition)

1555

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

1816

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

1556

1817

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

1818

# Wait for other process to exit

1819

proc.join()

1557

1820

return False

1558

1821

1559

1822

# Read a request from the child

1564

1827

fpr = request[1]

1565

1828

address = request[2]

1566

1829

1567

for c in self.clients:

1830

for c in self.clients.itervalues():

1568

1831

if c.fingerprint == fpr:

1569

1832

client = c

1570

1833

break

1573

1836

"dress: %s", fpr, address)

1574

1837

if self.use_dbus:

1575

1838

# Emit D-Bus signal

1576

mandos_dbus_service.ClientNotFound(fpr, address[0])

1839

mandos_dbus_service.ClientNotFound(fpr,

1840

address[0])

1577

1841

parent_pipe.send(False)

1578

1842

return False

1579

1843

1580

1844

gobject.io_add_watch(parent_pipe.fileno(),

1581

1845

gobject.IO_IN | gobject.IO_HUP,

1582

1846

functools.partial(self.handle_ipc,

1583

parent_pipe = parent_pipe,

1584

client_object = client))

1847

parent_pipe =

1848

parent_pipe,

1849

proc = proc,

1850

client_object =

1851

client))

1585

1852

parent_pipe.send(True)

1586

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

1853

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

1854

# same fileno

1587

1855

return False

1588

1856

if command == 'funcall':

1589

1857

funcname = request[1]

1590

1858

args = request[2]

1591

1859

kwargs = request[3]

1592

1860

1593

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

1594

1861

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

1862

funcname)(*args,

1863

**kwargs)))

1864

1595

1865

if command == 'getattr':

1596

1866

attrname = request[1]

1597

1867

if callable(client_object.__getattribute__(attrname)):

1598

1868

parent_pipe.send(('function',))

1599

1869

else:

1600

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

1870

parent_pipe.send(('data', client_object

1871

.__getattribute__(attrname)))

1601

1872

1602

1873

if command == 'setattr':

1603

1874

attrname = request[1]

1604

1875

value = request[2]

1605

1876

setattr(client_object, attrname, value)

1606

1877

1607

1878

return True

1608

1879

1609

1880

1646

1917

return timevalue

1647

1918

1648

1919

1649

def if_nametoindex(interface):

1650

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

1651

1652

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

1653

global if_nametoindex

1654

try:

1655

if_nametoindex = (ctypes.cdll.LoadLibrary

1656

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

1657

.if_nametoindex)

1658

except (OSError, AttributeError):

1659

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

1660

def if_nametoindex(interface):

1661

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

1662

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

1663

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

1664

ifreq = fcntl.ioctl(s, SIOCGIFINDEX,

1665

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

1666

interface))

1667

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

1668

ifreq[16:20])[0]

1669

return interface_index

1670

return if_nametoindex(interface)

1671

1672

1673

1920

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

1674

1921

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

1675

1922

1730

1977

" system bus interface")

1731

1978

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

1732

1979

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

1980

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

1981

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

1982

" state")

1983

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

1984

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

1985

1733

1986

options = parser.parse_args()

1734

1987

1735

1988

if options.check:

1748

2001

"use_dbus": "True",

1749

2002

"use_ipv6": "True",

1750

2003

"debuglevel": "",

2004

"restore": "True",

2005

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

1751

2006

}

1752

2007

1753

2008

# Parse config file for server-global settings

1770

2025

# options, if set.

1771

2026

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

1772

2027

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

1773

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

2028

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

2029

"statedir"):

1774

2030

value = getattr(options, option)

1775

2031

if value is not None:

1776

2032

server_settings[option] = value

1788

2044

debuglevel = server_settings["debuglevel"]

1789

2045

use_dbus = server_settings["use_dbus"]

1790

2046

use_ipv6 = server_settings["use_ipv6"]

1791

2047

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

2048

stored_state_file)

2049

2050

if debug:

2051

initlogger(logging.DEBUG)

2052

else:

2053

if not debuglevel:

2054

initlogger()

2055

else:

2056

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

2057

initlogger(level)

2058

1792

2059

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

1793

2060

syslogger.setFormatter(logging.Formatter

1794

2061

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

1796

2063

% server_settings["servicename"]))

1797

2064

1798

2065

# Parse config file with clients

1799

client_defaults = { "timeout": "1h",

1800

"interval": "5m",

2066

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

2067

"extended_timeout": "15m",

2068

"interval": "2m",

1801

2069

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

1802

2070

"host": "",

1803

2071

"approval_delay": "0s",

1847

2115

if error[0] != errno.EPERM:

1848

2116

raise error

1849

2117

1850

if not debug and not debuglevel:

1851

syslogger.setLevel(logging.WARNING)

1852

console.setLevel(logging.WARNING)

1853

if debuglevel:

1854

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

1855

syslogger.setLevel(level)

1856

console.setLevel(level)

1857

1858

2118

if debug:

1859

2119

# Enable all possible GnuTLS debugging

1860

2120

1891

2151

# End of Avahi example code

1892

2152

if use_dbus:

1893

2153

try:

1894

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

2154

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

1895

2155

bus, do_not_queue=True)

2156

old_bus_name = (dbus.service.BusName

2157

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

2158

do_not_queue=True))

1896

2159

except dbus.exceptions.NameExistsException as e:

1897

2160

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

1898

2161

use_dbus = False

1899

2162

server_settings["use_dbus"] = False

1900

2163

tcp_server.use_dbus = False

1901

2164

protocol = avahi.PROTO_INET6 if use_ipv6 else avahi.PROTO_INET

1902

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

1903

servicetype = "_mandos._tcp",

1904

protocol = protocol, bus = bus)

2165

service = AvahiServiceToSyslog(name =

2166

server_settings["servicename"],

2167

servicetype = "_mandos._tcp",

2168

protocol = protocol, bus = bus)

1905

2169

if server_settings["interface"]:

1906

2170

service.interface = (if_nametoindex

1907

2171

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

1911

2175

1912

2176

client_class = Client

1913

2177

if use_dbus:

1914

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

1915

def client_config_items(config, section):

1916

special_settings = {

1917

"approved_by_default":

1918

lambda: config.getboolean(section,

1919

"approved_by_default"),

1920

}

1921

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

2178

client_class = functools.partial(ClientDBusTransitional,

2179

bus = bus)

2180

2181

special_settings = {

2182

# Some settings need to be accessd by special methods;

2183

# booleans need .getboolean(), etc. Here is a list of them:

2184

"approved_by_default":

2185

lambda section:

2186

client_config.getboolean(section, "approved_by_default"),

2187

"enabled":

2188

lambda section:

2189

client_config.getboolean(section, "enabled"),

2190

}

2191

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

2192

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

2193

# with exceptions for any special settings as defined above

2194

client_settings = dict((clientname,

2195

dict((setting,

2196

(value

2197

if setting not in special_settings

2198

else special_settings[setting]

2199

(clientname)))

2200

for setting, value in

2201

client_config.items(clientname)))

2202

for clientname in client_config.sections())

2203

2204

old_client_settings = {}

2205

clients_data = []

2206

2207

# Get client data and settings from last running state.

2208

if server_settings["restore"]:

2209

try:

2210

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

2211

clients_data, old_client_settings = (pickle.load

2212

(stored_state))

2213

os.remove(stored_state_path)

2214

except IOError as e:

2215

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

2216

.format(e))

2217

if e.errno != errno.ENOENT:

2218

raise

2219

2220

with Crypto() as crypt:

2221

for client in clients_data:

2222

client_name = client["name"]

2223

2224

# Decide which value to use after restoring saved state.

2225

# We have three different values: Old config file,

2226

# new config file, and saved state.

2227

# New config value takes precedence if it differs from old

2228

# config value, otherwise use saved state.

2229

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

2230

try:

2231

# For each value in new config, check if it

2232

# differs from the old config value (Except for

2233

# the "secret" attribute)

2234

if (name != "secret" and

2235

value != old_client_settings[client_name]

2236

[name]):

2237

setattr(client, name, value)

2238

except KeyError:

2239

pass

2240

2241

# Clients who has passed its expire date can still be

2242

# enabled if its last checker was sucessful. Clients

2243

# whose checker failed before we stored its state is

2244

# assumed to have failed all checkers during downtime.

2245

if client["enabled"] and client["last_checked_ok"]:

2246

if ((datetime.datetime.utcnow()

2247

- client["last_checked_ok"])

2248

> client["interval"]):

2249

if client["last_checker_status"] != 0:

2250

client["enabled"] = False

2251

else:

2252

client["expires"] = (datetime.datetime

2253

.utcnow()

2254

+ client["timeout"])

2255

2256

client["changedstate"] = (multiprocessing_manager

2257

.Condition

2258

(multiprocessing_manager

2259

.Lock()))

2260

if use_dbus:

2261

new_client = (ClientDBusTransitional.__new__

2262

(ClientDBusTransitional))

2263

tcp_server.clients[client_name] = new_client

2264

new_client.bus = bus

2265

for name, value in client.iteritems():

2266

setattr(new_client, name, value)

2267

client_object_name = unicode(client_name).translate(

2268

{ord("."): ord("_"),

2269

ord("-"): ord("_")})

2270

new_client.dbus_object_path = (dbus.ObjectPath

2271

("/clients/"

2272

+ client_object_name))

2273

DBusObjectWithProperties.__init__(new_client,

2274

new_client.bus,

2275

new_client

2276

.dbus_object_path)

2277

else:

2278

tcp_server.clients[client_name] = (Client.__new__

2279

(Client))

2280

for name, value in client.iteritems():

2281

setattr(tcp_server.clients[client_name],

2282

name, value)

2283

1922

2284

try:

1923

yield (name, special_settings[name]())

1924

except KeyError:

1925

yield (name, value)

1926

1927

tcp_server.clients.update(set(

1928

client_class(name = section,

1929

config= dict(client_config_items(

1930

client_config, section)))

1931

for section in client_config.sections()))

2285

tcp_server.clients[client_name].secret = (

2286

crypt.decrypt(tcp_server.clients[client_name]

2287

.encrypted_secret,

2288

client_settings[client_name]

2289

["secret"]))

2290

except CryptoError:

2291

# If decryption fails, we use secret from new settings

2292

tcp_server.clients[client_name].secret = (

2293

client_settings[client_name]["secret"])

2294

2295

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

2296

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

2297

del tcp_server.clients[clientname]

2298

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

2299

tcp_server.clients[clientname] = (client_class(name

2300

= clientname,

2301

config =

2302

client_settings

2303

[clientname]))

2304

1932

2305

if not tcp_server.clients:

1933

2306

logger.warning("No clients defined")

1934

2307

1947

2320

del pidfilename

1948

2321

1949

2322

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

1950

2323

1951

2324

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

1952

2325

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

1953

2326

1956

2329

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

1957

2330

def __init__(self):

1958

2331

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

1959

_interface = "se.bsnet.fukt.Mandos"

2332

_interface = "se.recompile.Mandos"

1960

2333

1961

2334

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

1962

2335

def ClientAdded(self, objpath):

1977

2350

def GetAllClients(self):

1978

2351

"D-Bus method"

1979

2352

return dbus.Array(c.dbus_object_path

1980

for c in tcp_server.clients)

2353

for c in

2354

tcp_server.clients.itervalues())

1981

2355

1982

2356

@dbus.service.method(_interface,

1983

2357

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

1985

2359

"D-Bus method"

1986

2360

return dbus.Dictionary(

1987

2361

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

1988

for c in tcp_server.clients),

2362

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

1989

2363

signature="oa{sv}")

1990

2364

1991

2365

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

1992

2366

def RemoveClient(self, object_path):

1993

2367

"D-Bus method"

1994

for c in tcp_server.clients:

2368

for c in tcp_server.clients.itervalues():

1995

2369

if c.dbus_object_path == object_path:

1996

tcp_server.clients.remove(c)

2370

del tcp_server.clients[c.name]

1997

2371

c.remove_from_connection()

1998

2372

# Don't signal anything except ClientRemoved

1999

2373

c.disable(quiet=True)

2004

2378

2005

2379

del _interface

2006

2380

2007

mandos_dbus_service = MandosDBusService()

2381

class MandosDBusServiceTransitional(MandosDBusService):

2382

__metaclass__ = AlternateDBusNamesMetaclass

2383

mandos_dbus_service = MandosDBusServiceTransitional()

2008

2384

2009

2385

def cleanup():

2010

2386

"Cleanup function; run on exit"

2011

2387

service.cleanup()

2012

2388

2389

multiprocessing.active_children()

2390

if not (tcp_server.clients or client_settings):

2391

return

2392

2393

# Store client before exiting. Secrets are encrypted with key

2394

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

2395

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

2396

clients = []

2397

with Crypto() as crypt:

2398

for client in tcp_server.clients.itervalues():

2399

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

2400

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

2401

key)

2402

client_dict = {}

2403

2404

# A list of attributes that will not be stored when

2405

# shutting down.

2406

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

2407

for name, typ in (inspect.getmembers

2408

(dbus.service.Object)):

2409

exclude.add(name)

2410

2411

client_dict["encrypted_secret"] = (client

2412

.encrypted_secret)

2413

for attr in client.client_structure:

2414

if attr not in exclude:

2415

client_dict[attr] = getattr(client, attr)

2416

2417

clients.append(client_dict)

2418

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

2419

2420

try:

2421

with os.fdopen(os.open(stored_state_path,

2422

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

2423

0600), "wb") as stored_state:

2424

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

2425

except (IOError, OSError) as e:

2426

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

2427

.format(e))

2428

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

2429

raise

2430

2431

# Delete all clients, and settings from config

2013

2432

while tcp_server.clients:

2014

client = tcp_server.clients.pop()

2433

name, client = tcp_server.clients.popitem()

2015

2434

if use_dbus:

2016

2435

client.remove_from_connection()

2017

client.disable_hook = None

2018

2436

# Don't signal anything except ClientRemoved

2019

2437

client.disable(quiet=True)

2020

2438

if use_dbus:

2021

2439

# Emit D-Bus signal

2022

mandos_dbus_service.ClientRemoved(client.dbus_object_path,

2440

mandos_dbus_service.ClientRemoved(client

2441

.dbus_object_path,

2023

2442

client.name)

2443

client_settings.clear()

2024

2444

2025

2445

atexit.register(cleanup)

2026

2446

2027

for client in tcp_server.clients:

2447

for client in tcp_server.clients.itervalues():

2028

2448

if use_dbus:

2029

2449

# Emit D-Bus signal

2030

2450

mandos_dbus_service.ClientAdded(client.dbus_object_path)

2031

client.enable()

2451

# Need to initiate checking of clients

2452

if client.enabled:

2453

client.init_checker()

2032

2454

2033

2455

tcp_server.enable()

2034

2456

tcp_server.server_activate()

2074

2496

# Must run before the D-Bus bus name gets deregistered

2075

2497

cleanup()

2076

2498

2499

2077

2500

if __name__ == '__main__':

2078

2501

main()