/mandos/trunk : revision 518.2.2

28

# 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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70

import dbus.service

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75

import ctypes.util

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import xml.dom.minidom

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77

import inspect

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import GnuPGInterface

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79

76

80

try:

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81

SO_BINDTODEVICE = socket.SO_BINDTODEVICE

82

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:'

94

' %(message)s'))

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logger.addHandler(syslogger)

96

97

console = logging.StreamHandler()

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console.setFormatter(logging.Formatter('%(name)s [%(process)d]:'

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' %(levelname)s:'

100

' %(message)s'))

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logger.addHandler(console)

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97

try:

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if_nametoindex = (ctypes.cdll.LoadLibrary

99

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

100

.if_nametoindex)

101

except (OSError, AttributeError):

102

def if_nametoindex(interface):

103

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

104

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

105

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

106

ifreq = fcntl.ioctl(s, SIOCGIFINDEX,

107

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

108

interface))

109

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

110

ifreq[16:20])[0]

111

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:'

126

' %(message)s'))

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logger.addHandler(console)

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logger.setLevel(level)

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130

131

class CryptoError(Exception):

132

pass

133

134

135

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'])

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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):

170

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

171

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

172

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:

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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()

185

proc.wait()

186

except IOError as e:

187

raise CryptoError(e)

188

self.gnupg.passphrase = None

189

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})

198

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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208

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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

267

self.rename_count)

161

268

raise AvahiServiceError("Too many renames")

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

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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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272

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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275

self.add()

191

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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300

self.name, self.type)

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301

self.group.AddService(

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327

try:

224

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

414

415

last_checker_status: integer between 0 and 255 reflecting exit

416

status of last checker. -1 reflects crashed

417

checker, or None.

294

418

last_enabled: datetime.datetime(); (UTC)

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 = True

353

477

self.last_approval_request = None

354

self.last_enabled = None

478

self.last_enabled = datetime.datetime.utcnow()

355

479

self.last_checked_ok = None

480

self.last_checker_status = None

356

481

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

482

self.extended_timeout = string_to_delta(config

483

["extended_timeout"])

357

484

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

358

self.disable_hook = disable_hook

359

485

self.checker = None

360

486

self.checker_initiator_tag = None

361

487

self.disable_initiator_tag = None

488

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

362

489

self.checker_callback_tag = None

363

490

self.checker_command = config["checker"]

364

491

self.current_checker_command = None

365

self.last_connect = None

366

492

self._approved = None

367

493

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

368

494

True)

371

497

config["approval_delay"])

372

498

self.approval_duration = string_to_delta(

373

499

config["approval_duration"])

374

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

500

self.changedstate = (multiprocessing_manager

501

.Condition(multiprocessing_manager

502

.Lock()))

503

self.client_structure = [attr for attr in

504

self.__dict__.iterkeys()

505

if not attr.startswith("_")]

506

self.client_structure.append("client_structure")

507

508

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

509

lambda obj:

510

isinstance(obj,

511

property)):

512

if not name.startswith("_"):

513

self.client_structure.append(name)

375

514

515

# Send notice to process children that client state has changed

376

516

def send_changedstate(self):

377

self.changedstate.acquire()

378

self.changedstate.notify_all()

379

self.changedstate.release()

380

517

with self.changedstate:

518

self.changedstate.notify_all()

519

381

520

def enable(self):

382

521

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

383

522

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

384

523

# Already enabled

385

524

return

386

525

self.send_changedstate()

526

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

527

self.enabled = True

387

528

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()

529

self.init_checker()

400

530

401

531

def disable(self, quiet=True):

402

532

"""Disable this client."""

409

539

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

410

540

gobject.source_remove(self.disable_initiator_tag)

411

541

self.disable_initiator_tag = None

542

self.expires = None

412

543

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

413

544

gobject.source_remove(self.checker_initiator_tag)

414

545

self.checker_initiator_tag = None

415

546

self.stop_checker()

416

if self.disable_hook:

417

self.disable_hook(self)

418

547

self.enabled = False

419

548

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

420

549

return False

421

550

422

551

def __del__(self):

423

self.disable_hook = None

424

552

self.disable()

425

553

554

def init_checker(self):

555

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

556

# and every interval from then on.

557

self.checker_initiator_tag = (gobject.timeout_add

558

(self.interval_milliseconds(),

559

self.start_checker))

560

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

561

self.disable_initiator_tag = (gobject.timeout_add

562

(self.timeout_milliseconds(),

563

self.disable))

564

# Also start a new checker *right now*.

565

self.start_checker()

566

426

567

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

427

568

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

428

569

self.checker_callback_tag = None

429

570

self.checker = None

430

571

if os.WIFEXITED(condition):

431

exitstatus = os.WEXITSTATUS(condition)

432

if exitstatus == 0:

572

self.last_checker_status = os.WEXITSTATUS(condition)

573

if self.last_checker_status == 0:

433

574

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

434

575

vars(self))

435

576

self.checked_ok()

437

578

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

438

579

vars(self))

439

580

else:

581

self.last_checker_status = -1

440

582

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

441

583

vars(self))

442

584

443

def checked_ok(self):

585

def checked_ok(self, timeout=None):

444

586

"""Bump up the timeout for this client.

445

587

446

588

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

447

589

alive and well.

448

590

"""

591

if timeout is None:

592

timeout = self.timeout

449

593

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))

594

if self.disable_initiator_tag is not None:

595

gobject.source_remove(self.disable_initiator_tag)

596

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

597

self.disable_initiator_tag = (gobject.timeout_add

598

(_timedelta_to_milliseconds

599

(timeout), self.disable))

600

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

454

601

455

602

def need_approval(self):

456

603

self.last_approval_request = datetime.datetime.utcnow()

496

643

'replace')))

497

644

for attr in

498

645

self.runtime_expansions)

499

646

500

647

try:

501

648

command = self.checker_command % escaped_attrs

502

649

except TypeError as error:

548

695

raise

549

696

self.checker = None

550

697

698

551

699

def dbus_service_property(dbus_interface, signature="v",

552

700

access="readwrite", byte_arrays=False):

553

701

"""Decorators for marking methods of a DBusObjectWithProperties to

599

747

600

748

class DBusObjectWithProperties(dbus.service.Object):

601

749

"""A D-Bus object with properties.

602

750

603

751

Classes inheriting from this can use the dbus_service_property

604

752

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

605

753

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

612

760

def _get_all_dbus_properties(self):

613

761

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

614

762

"""

615

return ((prop._dbus_name, prop)

763

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

764

for cls in self.__class__.__mro__

616

765

for name, prop in

617

inspect.getmembers(self, self._is_dbus_property))

766

inspect.getmembers(cls, self._is_dbus_property))

618

767

619

768

def _get_dbus_property(self, interface_name, property_name):

620

769

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

621

770

property with the specified name and interface.

622

771

"""

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

772

for cls in self.__class__.__mro__:

773

for name, value in (inspect.getmembers

774

(cls, self._is_dbus_property)):

775

if (value._dbus_name == property_name

776

and value._dbus_interface == interface_name):

777

return value.__get__(self)

778

633

779

# No such property

634

780

raise DBusPropertyNotFound(self.dbus_object_path + ":"

635

781

+ interface_name + "."

669

815

def GetAll(self, interface_name):

670

816

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

671

817

standard.

672

818

673

819

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

674

820

"""

675

all = {}

821

properties = {}

676

822

for name, prop in self._get_all_dbus_properties():

677

823

if (interface_name

678

824

and interface_name != prop._dbus_interface):

683

829

continue

684

830

value = prop()

685

831

if not hasattr(value, "variant_level"):

686

all[name] = value

832

properties[name] = value

687

833

continue

688

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

689

value.variant_level+1)

690

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

834

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

835

value.variant_level+1)

836

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

691

837

692

838

@dbus.service.method(dbus.INTROSPECTABLE_IFACE,

693

839

out_signature="s",

737

883

return xmlstring

738

884

739

885

886

def datetime_to_dbus (dt, variant_level=0):

887

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

888

if dt is None:

889

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

890

return dbus.String(dt.isoformat(),

891

variant_level=variant_level)

892

893

894

class AlternateDBusNamesMetaclass(DBusObjectWithProperties

895

.__metaclass__):

896

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

897

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

898

"""

899

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

900

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

901

# methods, signals, or properties in them

902

for base in (b for b in bases

903

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

904

# Go though all attributes of the base class

905

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

906

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

907

# with the wrong interface name

908

if (not hasattr(attribute, "_dbus_interface")

909

or not attribute._dbus_interface

910

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

911

continue

912

# Create an alternate D-Bus interface name based on

913

# the current name

914

alt_interface = (attribute._dbus_interface

915

.replace("se.recompile.Mandos",

916

"se.bsnet.fukt.Mandos"))

917

# Is this a D-Bus signal?

918

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

919

# Extract the original non-method function by

920

# black magic

921

nonmethod_func = (dict(

922

zip(attribute.func_code.co_freevars,

923

attribute.__closure__))["func"]

924

.cell_contents)

925

# Create a new, but exactly alike, function

926

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

927

# with the alternate D-Bus interface name

928

new_function = (dbus.service.signal

929

(alt_interface,

930

attribute._dbus_signature)

931

(types.FunctionType(

932

nonmethod_func.func_code,

933

nonmethod_func.func_globals,

934

nonmethod_func.func_name,

935

nonmethod_func.func_defaults,

936

nonmethod_func.func_closure)))

937

# Define a creator of a function to call both the

938

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

939

# signals gets sent when the function is called

940

def fixscope(func1, func2):

941

"""This function is a scope container to pass

942

func1 and func2 to the "call_both" function

943

outside of its arguments"""

944

def call_both(*args, **kwargs):

945

"""This function will emit two D-Bus

946

signals by calling func1 and func2"""

947

func1(*args, **kwargs)

948

func2(*args, **kwargs)

949

return call_both

950

# Create the "call_both" function and add it to

951

# the class

952

attr[attrname] = fixscope(attribute,

953

new_function)

954

# Is this a D-Bus method?

955

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

956

# Create a new, but exactly alike, function

957

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

958

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

959

# to the class.

960

attr[attrname] = (dbus.service.method

961

(alt_interface,

962

attribute._dbus_in_signature,

963

attribute._dbus_out_signature)

964

(types.FunctionType

965

(attribute.func_code,

966

attribute.func_globals,

967

attribute.func_name,

968

attribute.func_defaults,

969

attribute.func_closure)))

970

# Is this a D-Bus property?

971

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

972

# Create a new, but exactly alike, function

973

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

974

# property with the alternate D-Bus interface

975

# name. Add it to the class.

976

attr[attrname] = (dbus_service_property

977

(alt_interface,

978

attribute._dbus_signature,

979

attribute._dbus_access,

980

attribute

981

._dbus_get_args_options

982

["byte_arrays"])

983

(types.FunctionType

984

(attribute.func_code,

985

attribute.func_globals,

986

attribute.func_name,

987

attribute.func_defaults,

988

attribute.func_closure)))

989

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

990

991

740

992

class ClientDBus(Client, DBusObjectWithProperties):

741

993

"""A Client class using D-Bus

742

994

751

1003

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

752

1004

753

1005

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

1006

self.bus = bus

1007

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

1008

754

1009

self._approvals_pending = 0

755

self.bus = bus

756

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

757

1010

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

758

1011

# the D-Bus

759

1012

client_object_name = unicode(self.name).translate(

764

1017

DBusObjectWithProperties.__init__(self, self.bus,

765

1018

self.dbus_object_path)

766

1019

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

1020

def notifychangeproperty(transform_func,

1021

dbus_name, type_func=lambda x: x,

1022

variant_level=1):

1023

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

1024

its changes to DBus.

1025

1026

transform_fun: Function that takes a value and a variant_level

1027

and transforms it to a D-Bus type.

1028

dbus_name: D-Bus name of the variable

1029

type_func: Function that transform the value before sending it

1030

to the D-Bus. Default: no transform

1031

variant_level: D-Bus variant level. Default: 1

1032

"""

1033

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

1034

def setter(self, value):

1035

if hasattr(self, "dbus_object_path"):

1036

if (not hasattr(self, attrname) or

1037

type_func(getattr(self, attrname, None))

1038

!= type_func(value)):

1039

dbus_value = transform_func(type_func(value),

1040

variant_level

1041

=variant_level)

1042

self.PropertyChanged(dbus.String(dbus_name),

1043

dbus_value)

1044

setattr(self, attrname, value)

1045

1046

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

1047

1048

1049

expires = notifychangeproperty(datetime_to_dbus, "Expires")

1050

approvals_pending = notifychangeproperty(dbus.Boolean,

1051

"ApprovalPending",

1052

type_func = bool)

1053

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

1054

last_enabled = notifychangeproperty(datetime_to_dbus,

1055

"LastEnabled")

1056

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

1057

type_func = lambda checker:

1058

checker is not None)

1059

last_checked_ok = notifychangeproperty(datetime_to_dbus,

1060

"LastCheckedOK")

1061

last_approval_request = notifychangeproperty(

1062

datetime_to_dbus, "LastApprovalRequest")

1063

approved_by_default = notifychangeproperty(dbus.Boolean,

1064

"ApprovedByDefault")

1065

approval_delay = notifychangeproperty(dbus.UInt16,

1066

"ApprovalDelay",

1067

type_func =

1068

_timedelta_to_milliseconds)

1069

approval_duration = notifychangeproperty(

1070

dbus.UInt16, "ApprovalDuration",

1071

type_func = _timedelta_to_milliseconds)

1072

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

1073

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

1074

type_func =

1075

_timedelta_to_milliseconds)

1076

extended_timeout = notifychangeproperty(

1077

dbus.UInt16, "ExtendedTimeout",

1078

type_func = _timedelta_to_milliseconds)

1079

interval = notifychangeproperty(dbus.UInt16,

1080

"Interval",

1081

type_func =

1082

_timedelta_to_milliseconds)

1083

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

1084

1085

del notifychangeproperty

810

1086

811

1087

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

812

1088

try:

821

1097

*args, **kwargs):

822

1098

self.checker_callback_tag = None

823

1099

self.checker = None

824

# Emit D-Bus signal

825

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

826

dbus.Boolean(False, variant_level=1))

827

1100

if os.WIFEXITED(condition):

828

1101

exitstatus = os.WEXITSTATUS(condition)

829

1102

# Emit D-Bus signal

839

1112

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

840

1113

*args, **kwargs)

841

1114

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

1115

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

860

1116

old_checker = self.checker

861

1117

if self.checker is not None:

868

1124

and old_checker_pid != self.checker.pid):

869

1125

# Emit D-Bus signal

870

1126

self.CheckerStarted(self.current_checker_command)

871

self.PropertyChanged(

872

dbus.String("CheckerRunning"),

873

dbus.Boolean(True, variant_level=1))

874

1127

return r

875

1128

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

1129

def _reset_approved(self):

886

1130

self._approved = None

887

1131

return False

889

1133

def approve(self, value=True):

890

1134

self.send_changedstate()

891

1135

self._approved = value

892

gobject.timeout_add(self._timedelta_to_milliseconds

1136

gobject.timeout_add(_timedelta_to_milliseconds

893

1137

(self.approval_duration),

894

1138

self._reset_approved)

895

1139

896

1140

897

1141

## D-Bus methods, signals & properties

898

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

1142

_interface = "se.recompile.Mandos.Client"

899

1143

900

1144

## Signals

901

1145

938

1182

"D-Bus signal"

939

1183

return self.need_approval()

940

1184

1185

# NeRwequest - signal

1186

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

1187

def NewRequest(self, ip):

1188

"""D-Bus signal

1189

Is sent after a client request a password.

1190

"""

1191

pass

1192

941

1193

## Methods

942

1194

943

1195

# Approve - method

987

1239

if value is None: # get

988

1240

return dbus.Boolean(self.approved_by_default)

989

1241

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

1242

994

1243

# ApprovalDelay - property

995

1244

@dbus_service_property(_interface, signature="t",

998

1247

if value is None: # get

999

1248

return dbus.UInt64(self.approval_delay_milliseconds())

1000

1249

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

1250

1005

1251

# ApprovalDuration - property

1006

1252

@dbus_service_property(_interface, signature="t",

1007

1253

access="readwrite")

1008

1254

def ApprovalDuration_dbus_property(self, value=None):

1009

1255

if value is None: # get

1010

return dbus.UInt64(self._timedelta_to_milliseconds(

1256

return dbus.UInt64(_timedelta_to_milliseconds(

1011

1257

self.approval_duration))

1012

1258

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

1259

1017

1260

# Name - property

1018

1261

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

1031

1274

if value is None: # get

1032

1275

return dbus.String(self.host)

1033

1276

self.host = value

1034

# Emit D-Bus signal

1035

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

1036

dbus.String(value, variant_level=1))

1037

1277

1038

1278

# Created - property

1039

1279

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

1040

1280

def Created_dbus_property(self):

1041

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

1281

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

1042

1282

1043

1283

# LastEnabled - property

1044

1284

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

1045

1285

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))

1286

return datetime_to_dbus(self.last_enabled)

1049

1287

1050

1288

# Enabled - property

1051

1289

@dbus_service_property(_interface, signature="b",

1065

1303

if value is not None:

1066

1304

self.checked_ok()

1067

1305

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))

1306

return datetime_to_dbus(self.last_checked_ok)

1307

1308

# Expires - property

1309

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

1310

def Expires_dbus_property(self):

1311

return datetime_to_dbus(self.expires)

1072

1312

1073

1313

# LastApprovalRequest - property

1074

1314

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

1075

1315

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))

1316

return datetime_to_dbus(self.last_approval_request)

1081

1317

1082

1318

# Timeout - property

1083

1319

@dbus_service_property(_interface, signature="t",

1086

1322

if value is None: # get

1087

1323

return dbus.UInt64(self.timeout_milliseconds())

1088

1324

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

1325

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

1093

1326

return

1094

1327

# Reschedule timeout

1095

1328

gobject.source_remove(self.disable_initiator_tag)

1096

1329

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()))

1330

self.expires = None

1331

time_to_die = _timedelta_to_milliseconds((self

1332

.last_checked_ok

1333

+ self.timeout)

1334

- datetime.datetime

1335

.utcnow())

1103

1336

if time_to_die <= 0:

1104

1337

# The timeout has passed

1105

1338

self.disable()

1106

1339

else:

1340

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

1341

+ datetime.timedelta(milliseconds =

1342

time_to_die))

1107

1343

self.disable_initiator_tag = (gobject.timeout_add

1108

1344

(time_to_die, self.disable))

1109

1345

1346

# ExtendedTimeout - property

1347

@dbus_service_property(_interface, signature="t",

1348

access="readwrite")

1349

def ExtendedTimeout_dbus_property(self, value=None):

1350

if value is None: # get

1351

return dbus.UInt64(self.extended_timeout_milliseconds())

1352

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

1353

1110

1354

# Interval - property

1111

1355

@dbus_service_property(_interface, signature="t",

1112

1356

access="readwrite")

1114

1358

if value is None: # get

1115

1359

return dbus.UInt64(self.interval_milliseconds())

1116

1360

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

1361

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

1121

1362

return

1122

1363

# Reschedule checker run

1124

1365

self.checker_initiator_tag = (gobject.timeout_add

1125

1366

(value, self.start_checker))

1126

1367

self.start_checker() # Start one now, too

1127

1368

1128

1369

# Checker - property

1129

1370

@dbus_service_property(_interface, signature="s",

1130

1371

access="readwrite")

1132

1373

if value is None: # get

1133

1374

return dbus.String(self.checker_command)

1134

1375

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

1376

1140

1377

# CheckerRunning - property

1141

1378

@dbus_service_property(_interface, signature="b",

1168

1405

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

1169

1406

if not self._pipe.recv():

1170

1407

raise KeyError()

1171

1408

1172

1409

def __getattribute__(self, name):

1173

1410

if(name == '_pipe'):

1174

1411

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

1181

1418

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

1182

1419

return self._pipe.recv()[1]

1183

1420

return func

1184

1421

1185

1422

def __setattr__(self, name, value):

1186

1423

if(name == '_pipe'):

1187

1424

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

1188

1425

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

1189

1426

1190

1427

1428

class ClientDBusTransitional(ClientDBus):

1429

__metaclass__ = AlternateDBusNamesMetaclass

1430

1431

1191

1432

class ClientHandler(socketserver.BaseRequestHandler, object):

1192

1433

"""A class to handle client connections.

1193

1434

1200

1441

unicode(self.client_address))

1201

1442

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

1202

1443

self.server.child_pipe.fileno())

1203

1444

1204

1445

session = (gnutls.connection

1205

1446

.ClientSession(self.request,

1206

1447

gnutls.connection

1207

1448

.X509Credentials()))

1208

1449

1209

1450

# Note: gnutls.connection.X509Credentials is really a

1210

1451

# generic GnuTLS certificate credentials object so long as

1211

1452

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

1212

1453

# here despite using OpenPGP certificates.

1213

1454

1214

1455

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

1215

1456

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

1216

1457

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

1222

1463

(gnutls.library.functions

1223

1464

.gnutls_priority_set_direct(session._c_object,

1224

1465

priority, None))

1225

1466

1226

1467

# Start communication using the Mandos protocol

1227

1468

# Get protocol number

1228

1469

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

1233

1474

except (ValueError, IndexError, RuntimeError) as error:

1234

1475

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

1235

1476

return

1236

1477

1237

1478

# Start GnuTLS connection

1238

1479

try:

1239

1480

session.handshake()

1243

1484

# established. Just abandon the request.

1244

1485

return

1245

1486

logger.debug("Handshake succeeded")

1246

1487

1247

1488

approval_required = False

1248

1489

try:

1249

1490

try:

1254

1495

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

1255

1496

return

1256

1497

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

1257

1498

if self.server.use_dbus:

1499

# Emit D-Bus signal

1500

client.NewRequest(str(self.client_address))

1501

1258

1502

try:

1259

1503

client = ProxyClient(child_pipe, fpr,

1260

1504

self.client_address)

1272

1516

client.name)

1273

1517

if self.server.use_dbus:

1274

1518

# Emit D-Bus signal

1275

client.Rejected("Disabled")

1519

client.Rejected("Disabled")

1276

1520

return

1277

1521

1278

1522

if client._approved or not client.approval_delay:

1295

1539

return

1296

1540

1297

1541

#wait until timeout or approved

1298

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

1299

1542

time = datetime.datetime.now()

1300

1543

client.changedstate.acquire()

1301

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

1544

(client.changedstate.wait

1545

(float(client._timedelta_to_milliseconds(delay)

1546

/ 1000)))

1302

1547

client.changedstate.release()

1303

1548

time2 = datetime.datetime.now()

1304

1549

if (time2 - time) >= delay:

1326

1571

sent, len(client.secret)

1327

1572

- (sent_size + sent))

1328

1573

sent_size += sent

1329

1574

1330

1575

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

1331

# bump the timeout as if seen

1332

client.checked_ok()

1576

# bump the timeout using extended_timeout

1577

client.checked_ok(client.extended_timeout)

1333

1578

if self.server.use_dbus:

1334

1579

# Emit D-Bus signal

1335

1580

client.GotSecret()

1402

1647

# Convert the buffer to a Python bytestring

1403

1648

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

1404

1649

# Convert the bytestring to hexadecimal notation

1405

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

1650

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

1406

1651

return hex_fpr

1407

1652

1408

1653

1414

1659

except:

1415

1660

self.handle_error(request, address)

1416

1661

self.close_request(request)

1417

1662

1418

1663

def process_request(self, request, address):

1419

1664

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

1420

multiprocessing.Process(target = self.sub_process_main,

1421

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

1665

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

1666

args = (request,

1667

address))

1668

proc.start()

1669

return proc

1670

1422

1671

1423

1672

class MultiprocessingMixInWithPipe(MultiprocessingMixIn, object):

1424

1673

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

1428

1677

This function creates a new pipe in self.pipe

1429

1678

"""

1430

1679

parent_pipe, self.child_pipe = multiprocessing.Pipe()

1431

1432

super(MultiprocessingMixInWithPipe,

1433

self).process_request(request, client_address)

1680

1681

proc = MultiprocessingMixIn.process_request(self, request,

1682

client_address)

1434

1683

self.child_pipe.close()

1435

self.add_pipe(parent_pipe)

1436

1437

def add_pipe(self, parent_pipe):

1684

self.add_pipe(parent_pipe, proc)

1685

1686

def add_pipe(self, parent_pipe, proc):

1438

1687

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

1439

1688

raise NotImplementedError

1440

1689

1690

1441

1691

class IPv6_TCPServer(MultiprocessingMixInWithPipe,

1442

1692

socketserver.TCPServer, object):

1443

1693

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

1517

1767

self.enabled = False

1518

1768

self.clients = clients

1519

1769

if self.clients is None:

1520

self.clients = set()

1770

self.clients = {}

1521

1771

self.use_dbus = use_dbus

1522

1772

self.gnutls_priority = gnutls_priority

1523

1773

IPv6_TCPServer.__init__(self, server_address,

1527

1777

def server_activate(self):

1528

1778

if self.enabled:

1529

1779

return socketserver.TCPServer.server_activate(self)

1780

1530

1781

def enable(self):

1531

1782

self.enabled = True

1532

def add_pipe(self, parent_pipe):

1783

1784

def add_pipe(self, parent_pipe, proc):

1533

1785

# Call "handle_ipc" for both data and EOF events

1534

1786

gobject.io_add_watch(parent_pipe.fileno(),

1535

1787

gobject.IO_IN | gobject.IO_HUP,

1536

1788

functools.partial(self.handle_ipc,

1537

parent_pipe = parent_pipe))

1538

1789

parent_pipe =

1790

parent_pipe,

1791

proc = proc))

1792

1539

1793

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

1540

client_object=None):

1794

proc = None, client_object=None):

1541

1795

condition_names = {

1542

1796

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

1543

1797

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

1552

1806

for cond, name in

1553

1807

condition_names.iteritems()

1554

1808

if cond & condition)

1555

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

1809

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

1556

1810

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

1811

# Wait for other process to exit

1812

proc.join()

1557

1813

return False

1558

1814

1559

1815

# Read a request from the child

1564

1820

fpr = request[1]

1565

1821

address = request[2]

1566

1822

1567

for c in self.clients:

1823

for c in self.clients.itervalues():

1568

1824

if c.fingerprint == fpr:

1569

1825

client = c

1570

1826

break

1573

1829

"dress: %s", fpr, address)

1574

1830

if self.use_dbus:

1575

1831

# Emit D-Bus signal

1576

mandos_dbus_service.ClientNotFound(fpr, address[0])

1832

mandos_dbus_service.ClientNotFound(fpr,

1833

address[0])

1577

1834

parent_pipe.send(False)

1578

1835

return False

1579

1836

1580

1837

gobject.io_add_watch(parent_pipe.fileno(),

1581

1838

gobject.IO_IN | gobject.IO_HUP,

1582

1839

functools.partial(self.handle_ipc,

1583

parent_pipe = parent_pipe,

1584

client_object = client))

1840

parent_pipe =

1841

parent_pipe,

1842

proc = proc,

1843

client_object =

1844

client))

1585

1845

parent_pipe.send(True)

1586

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

1846

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

1847

# same fileno

1587

1848

return False

1588

1849

if command == 'funcall':

1589

1850

funcname = request[1]

1590

1851

args = request[2]

1591

1852

kwargs = request[3]

1592

1853

1593

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

1594

1854

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

1855

funcname)(*args,

1856

**kwargs)))

1857

1595

1858

if command == 'getattr':

1596

1859

attrname = request[1]

1597

1860

if callable(client_object.__getattribute__(attrname)):

1598

1861

parent_pipe.send(('function',))

1599

1862

else:

1600

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

1863

parent_pipe.send(('data', client_object

1864

.__getattribute__(attrname)))

1601

1865

1602

1866

if command == 'setattr':

1603

1867

attrname = request[1]

1604

1868

value = request[2]

1605

1869

setattr(client_object, attrname, value)

1606

1870

1607

1871

return True

1608

1872

1609

1873

1646

1910

return timevalue

1647

1911

1648

1912

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

1913

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

1674

1914

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

1675

1915

1730

1970

" system bus interface")

1731

1971

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

1732

1972

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

1973

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

1974

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

1975

" state")

1976

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

1977

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

1978

1733

1979

options = parser.parse_args()

1734

1980

1735

1981

if options.check:

1748

1994

"use_dbus": "True",

1749

1995

"use_ipv6": "True",

1750

1996

"debuglevel": "",

1997

"restore": "True",

1998

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

1751

1999

}

1752

2000

1753

2001

# Parse config file for server-global settings

1770

2018

# options, if set.

1771

2019

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

1772

2020

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

1773

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

2021

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

2022

"statedir"):

1774

2023

value = getattr(options, option)

1775

2024

if value is not None:

1776

2025

server_settings[option] = value

1788

2037

debuglevel = server_settings["debuglevel"]

1789

2038

use_dbus = server_settings["use_dbus"]

1790

2039

use_ipv6 = server_settings["use_ipv6"]

1791

2040

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

2041

stored_state_file)

2042

2043

if debug:

2044

initlogger(logging.DEBUG)

2045

else:

2046

if not debuglevel:

2047

initlogger()

2048

else:

2049

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

2050

initlogger(level)

2051

1792

2052

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

1793

2053

syslogger.setFormatter(logging.Formatter

1794

2054

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

1796

2056

% server_settings["servicename"]))

1797

2057

1798

2058

# Parse config file with clients

1799

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

1800

"interval": "5m",

2059

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

2060

"extended_timeout": "15m",

2061

"interval": "2m",

1801

2062

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

1802

2063

"host": "",

1803

2064

"approval_delay": "0s",

1847

2108

if error[0] != errno.EPERM:

1848

2109

raise error

1849

2110

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

2111

if debug:

1859

2112

# Enable all possible GnuTLS debugging

1860

2113

1891

2144

# End of Avahi example code

1892

2145

if use_dbus:

1893

2146

try:

1894

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

2147

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

1895

2148

bus, do_not_queue=True)

2149

old_bus_name = (dbus.service.BusName

2150

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

2151

do_not_queue=True))

1896

2152

except dbus.exceptions.NameExistsException as e:

1897

2153

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

1898

2154

use_dbus = False

1899

2155

server_settings["use_dbus"] = False

1900

2156

tcp_server.use_dbus = False

1901

2157

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)

2158

service = AvahiServiceToSyslog(name =

2159

server_settings["servicename"],

2160

servicetype = "_mandos._tcp",

2161

protocol = protocol, bus = bus)

1905

2162

if server_settings["interface"]:

1906

2163

service.interface = (if_nametoindex

1907

2164

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

1911

2168

1912

2169

client_class = Client

1913

2170

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):

2171

client_class = functools.partial(ClientDBusTransitional,

2172

bus = bus)

2173

2174

special_settings = {

2175

# Some settings need to be accessd by special methods;

2176

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

2177

"approved_by_default":

2178

lambda section:

2179

client_config.getboolean(section, "approved_by_default"),

2180

}

2181

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

2182

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

2183

# with exceptions for any special settings as defined above

2184

client_settings = dict((clientname,

2185

dict((setting,

2186

(value

2187

if setting not in special_settings

2188

else special_settings[setting]

2189

(clientname)))

2190

for setting, value in

2191

client_config.items(clientname)))

2192

for clientname in client_config.sections())

2193

2194

old_client_settings = {}

2195

clients_data = []

2196

2197

# Get client data and settings from last running state.

2198

if server_settings["restore"]:

2199

try:

2200

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

2201

clients_data, old_client_settings = (pickle.load

2202

(stored_state))

2203

os.remove(stored_state_path)

2204

except IOError as e:

2205

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

2206

.format(e))

2207

if e.errno != errno.ENOENT:

2208

raise

2209

2210

with Crypto() as crypt:

2211

for client in clients_data:

2212

client_name = client["name"]

2213

2214

# Decide which value to use after restoring saved state.

2215

# We have three different values: Old config file,

2216

# new config file, and saved state.

2217

# New config value takes precedence if it differs from old

2218

# config value, otherwise use saved state.

2219

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

2220

try:

2221

# For each value in new config, check if it

2222

# differs from the old config value (Except for

2223

# the "secret" attribute)

2224

if (name != "secret" and

2225

value != old_client_settings[client_name]

2226

[name]):

2227

setattr(client, name, value)

2228

except KeyError:

2229

pass

2230

2231

# Clients who has passed its expire date can still be

2232

# enabled if its last checker was sucessful. Clients

2233

# whose checker failed before we stored its state is

2234

# assumed to have failed all checkers during downtime.

2235

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

2236

if ((datetime.datetime.utcnow()

2237

- client["last_checked_ok"])

2238

> client["interval"]):

2239

if client["last_checker_status"] != 0:

2240

client["enabled"] = False

2241

else:

2242

client["expires"] = (datetime.datetime

2243

.utcnow()

2244

+ client["timeout"])

2245

2246

client["changedstate"] = (multiprocessing_manager

2247

.Condition

2248

(multiprocessing_manager

2249

.Lock()))

2250

if use_dbus:

2251

new_client = (ClientDBusTransitional.__new__

2252

(ClientDBusTransitional))

2253

tcp_server.clients[client_name] = new_client

2254

new_client.bus = bus

2255

for name, value in client.iteritems():

2256

setattr(new_client, name, value)

2257

client_object_name = unicode(client_name).translate(

2258

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

2259

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

2260

new_client.dbus_object_path = (dbus.ObjectPath

2261

("/clients/"

2262

+ client_object_name))

2263

DBusObjectWithProperties.__init__(new_client,

2264

new_client.bus,

2265

new_client

2266

.dbus_object_path)

2267

else:

2268

tcp_server.clients[client_name] = (Client.__new__

2269

(Client))

2270

for name, value in client.iteritems():

2271

setattr(tcp_server.clients[client_name],

2272

name, value)

2273

1922

2274

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()))

2275

tcp_server.clients[client_name].secret = (

2276

crypt.decrypt(tcp_server.clients[client_name]

2277

.encrypted_secret,

2278

client_settings[client_name]

2279

["secret"]))

2280

except CryptoError:

2281

# If decryption fails, we use secret from new settings

2282

tcp_server.clients[client_name].secret = (

2283

client_settings[client_name]["secret"])

2284

2285

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

2286

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

2287

del tcp_server.clients[clientname]

2288

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

2289

tcp_server.clients[clientname] = (client_class(name

2290

= clientname,

2291

config =

2292

client_settings

2293

[clientname]))

2294

1932

2295

if not tcp_server.clients:

1933

2296

logger.warning("No clients defined")

1934

2297

1947

2310

del pidfilename

1948

2311

1949

2312

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

1950

2313

1951

2314

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

1952

2315

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

1953

2316

1956

2319

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

1957

2320

def __init__(self):

1958

2321

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

1959

_interface = "se.bsnet.fukt.Mandos"

2322

_interface = "se.recompile.Mandos"

1960

2323

1961

2324

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

1962

2325

def ClientAdded(self, objpath):

1977

2340

def GetAllClients(self):

1978

2341

"D-Bus method"

1979

2342

return dbus.Array(c.dbus_object_path

1980

for c in tcp_server.clients)

2343

for c in

2344

tcp_server.clients.itervalues())

1981

2345

1982

2346

@dbus.service.method(_interface,

1983

2347

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

1985

2349

"D-Bus method"

1986

2350

return dbus.Dictionary(

1987

2351

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

1988

for c in tcp_server.clients),

2352

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

1989

2353

signature="oa{sv}")

1990

2354

1991

2355

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

1992

2356

def RemoveClient(self, object_path):

1993

2357

"D-Bus method"

1994

for c in tcp_server.clients:

2358

for c in tcp_server.clients.itervalues():

1995

2359

if c.dbus_object_path == object_path:

1996

tcp_server.clients.remove(c)

2360

del tcp_server.clients[c.name]

1997

2361

c.remove_from_connection()

1998

2362

# Don't signal anything except ClientRemoved

1999

2363

c.disable(quiet=True)

2004

2368

2005

2369

del _interface

2006

2370

2007

mandos_dbus_service = MandosDBusService()

2371

class MandosDBusServiceTransitional(MandosDBusService):

2372

__metaclass__ = AlternateDBusNamesMetaclass

2373

mandos_dbus_service = MandosDBusServiceTransitional()

2008

2374

2009

2375

def cleanup():

2010

2376

"Cleanup function; run on exit"

2011

2377

service.cleanup()

2012

2378

2379

multiprocessing.active_children()

2380

if not (tcp_server.clients or client_settings):

2381

return

2382

2383

# Store client before exiting. Secrets are encrypted with key

2384

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

2385

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

2386

clients = []

2387

with Crypto() as crypt:

2388

for client in tcp_server.clients.itervalues():

2389

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

2390

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

2391

key)

2392

client_dict = {}

2393

2394

# A list of attributes that will not be stored when

2395

# shutting down.

2396

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

2397

for name, typ in (inspect.getmembers

2398

(dbus.service.Object)):

2399

exclude.add(name)

2400

2401

client_dict["encrypted_secret"] = (client

2402

.encrypted_secret)

2403

for attr in client.client_structure:

2404

if attr not in exclude:

2405

client_dict[attr] = getattr(client, attr)

2406

2407

clients.append(client_dict)

2408

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

2409

2410

try:

2411

with os.fdopen(os.open(stored_state_path,

2412

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

2413

0600), "wb") as stored_state:

2414

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

2415

except (IOError, OSError) as e:

2416

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

2417

.format(e))

2418

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

2419

raise

2420

2421

# Delete all clients, and settings from config

2013

2422

while tcp_server.clients:

2014

client = tcp_server.clients.pop()

2423

name, client = tcp_server.clients.popitem()

2015

2424

if use_dbus:

2016

2425

client.remove_from_connection()

2017

client.disable_hook = None

2018

2426

# Don't signal anything except ClientRemoved

2019

2427

client.disable(quiet=True)

2020

2428

if use_dbus:

2021

2429

# Emit D-Bus signal

2022

mandos_dbus_service.ClientRemoved(client.dbus_object_path,

2430

mandos_dbus_service.ClientRemoved(client

2431

.dbus_object_path,

2023

2432

client.name)

2433

client_settings.clear()

2024

2434

2025

2435

atexit.register(cleanup)

2026

2436

2027

for client in tcp_server.clients:

2437

for client in tcp_server.clients.itervalues():

2028

2438

if use_dbus:

2029

2439

# Emit D-Bus signal

2030

2440

mandos_dbus_service.ClientAdded(client.dbus_object_path)

2031

client.enable()

2441

# Need to initiate checking of clients

2442

if client.enabled:

2443

client.init_checker()

2032

2444

2033

2445

tcp_server.enable()

2034

2446

tcp_server.server_activate()

2074

2486

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

2075

2487

cleanup()

2076

2488

2489

2077

2490

if __name__ == '__main__':

2078

2491

main()