/mandos/trunk : revision 518.2.3

28

# along with this program. If not, see

29

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

30

#

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

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

32

#

33

34

from __future__ import (division, absolute_import, print_function,

62

import functools

63

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

69

import dbus

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import dbus.service

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75

import ctypes.util

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76

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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81

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 = "1.3.1"

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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

90

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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)

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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:'

100

' %(message)s'))

101

logger.addHandler(console)

96

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):

103

"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,

107

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

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interface))

109

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

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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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117

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

131

class CryptoError(Exception):

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pass

133

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):

147

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,

160

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

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)

183

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

184

ciphertext = f.read()

185

proc.wait()

186

except IOError as e:

187

raise CryptoError(e)

188

self.gnupg.passphrase = None

189

return ciphertext

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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'],

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

197

attach_fhs={'stderr': devnull})

198

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

199

f.write(data)

200

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")

162

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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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()

170

274

try:

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275

self.add()

191

295

avahi.DBUS_INTERFACE_ENTRY_GROUP)

192

296

self.entry_group_state_changed_match = (

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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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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

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

308

432

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

309

433

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

310

434

311

@staticmethod

312

def _timedelta_to_milliseconds(td):

313

"Convert a datetime.timedelta() to milliseconds"

314

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

315

+ (td.seconds * 1000)

316

+ (td.microseconds // 1000))

317

318

435

def timeout_milliseconds(self):

319

436

"Return the 'timeout' attribute in milliseconds"

320

return self._timedelta_to_milliseconds(self.timeout)

321

437

return _timedelta_to_milliseconds(self.timeout)

438

322

439

def extended_timeout_milliseconds(self):

323

440

"Return the 'extended_timeout' attribute in milliseconds"

324

return self._timedelta_to_milliseconds(self.extended_timeout)

441

return _timedelta_to_milliseconds(self.extended_timeout)

325

442

326

443

def interval_milliseconds(self):

327

444

"Return the 'interval' attribute in milliseconds"

328

return self._timedelta_to_milliseconds(self.interval)

329

445

return _timedelta_to_milliseconds(self.interval)

446

330

447

def approval_delay_milliseconds(self):

331

return self._timedelta_to_milliseconds(self.approval_delay)

448

return _timedelta_to_milliseconds(self.approval_delay)

332

449

333

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

450

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

334

451

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

335

452

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

336

453

attribute."""

356

473

% self.name)

357

474

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

358

475

self.created = datetime.datetime.utcnow()

359

self.enabled = False

476

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

360

477

self.last_approval_request = None

361

self.last_enabled = None

478

if self.enabled:

479

self.last_enabled = datetime.datetime.utcnow()

480

else:

481

self.last_enabled = None

362

482

self.last_checked_ok = None

483

self.last_checker_status = None

363

484

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

364

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

485

self.extended_timeout = string_to_delta(config

486

["extended_timeout"])

365

487

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

366

self.disable_hook = disable_hook

367

488

self.checker = None

368

489

self.checker_initiator_tag = None

369

490

self.disable_initiator_tag = None

370

self.expires = None

491

if self.enabled:

492

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

493

else:

494

self.expires = None

371

495

self.checker_callback_tag = None

372

496

self.checker_command = config["checker"]

373

497

self.current_checker_command = None

374

self.last_connect = None

375

498

self._approved = None

376

499

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

377

500

True)

380

503

config["approval_delay"])

381

504

self.approval_duration = string_to_delta(

382

505

config["approval_duration"])

383

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)

384

520

521

# Send notice to process children that client state has changed

385

522

def send_changedstate(self):

386

self.changedstate.acquire()

387

self.changedstate.notify_all()

388

self.changedstate.release()

389

523

with self.changedstate:

524

self.changedstate.notify_all()

525

390

526

def enable(self):

391

527

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

392

528

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

393

529

# Already enabled

394

530

return

395

531

self.send_changedstate()

532

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

533

self.enabled = True

396

534

self.last_enabled = datetime.datetime.utcnow()

397

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

398

# and every interval from then on.

399

self.checker_initiator_tag = (gobject.timeout_add

400

(self.interval_milliseconds(),

401

self.start_checker))

402

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

403

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

404

self.disable_initiator_tag = (gobject.timeout_add

405

(self.timeout_milliseconds(),

406

self.disable))

407

self.enabled = True

408

# Also start a new checker *right now*.

409

self.start_checker()

535

self.init_checker()

410

536

411

537

def disable(self, quiet=True):

412

538

"""Disable this client."""

424

550

gobject.source_remove(self.checker_initiator_tag)

425

551

self.checker_initiator_tag = None

426

552

self.stop_checker()

427

if self.disable_hook:

428

self.disable_hook(self)

429

553

self.enabled = False

430

554

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

431

555

return False

432

556

433

557

def __del__(self):

434

self.disable_hook = None

435

558

self.disable()

436

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

437

573

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

438

574

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

439

575

self.checker_callback_tag = None

440

576

self.checker = None

441

577

if os.WIFEXITED(condition):

442

exitstatus = os.WEXITSTATUS(condition)

443

if exitstatus == 0:

578

self.last_checker_status = os.WEXITSTATUS(condition)

579

if self.last_checker_status == 0:

444

580

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

445

581

vars(self))

446

582

self.checked_ok()

448

584

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

449

585

vars(self))

450

586

else:

587

self.last_checker_status = -1

451

588

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

452

589

vars(self))

453

590

460

597

if timeout is None:

461

598

timeout = self.timeout

462

599

self.last_checked_ok = datetime.datetime.utcnow()

463

gobject.source_remove(self.disable_initiator_tag)

464

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

465

self.disable_initiator_tag = (gobject.timeout_add

466

(self._timedelta_to_milliseconds(timeout),

467

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

468

607

469

608

def need_approval(self):

470

609

self.last_approval_request = datetime.datetime.utcnow()

510

649

'replace')))

511

650

for attr in

512

651

self.runtime_expansions)

513

652

514

653

try:

515

654

command = self.checker_command % escaped_attrs

516

655

except TypeError as error:

562

701

raise

563

702

self.checker = None

564

703

704

565

705

def dbus_service_property(dbus_interface, signature="v",

566

706

access="readwrite", byte_arrays=False):

567

707

"""Decorators for marking methods of a DBusObjectWithProperties to

613

753

614

754

class DBusObjectWithProperties(dbus.service.Object):

615

755

"""A D-Bus object with properties.

616

756

617

757

Classes inheriting from this can use the dbus_service_property

618

758

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

619

759

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

626

766

def _get_all_dbus_properties(self):

627

767

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

628

768

"""

629

return ((prop._dbus_name, prop)

769

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

770

for cls in self.__class__.__mro__

630

771

for name, prop in

631

inspect.getmembers(self, self._is_dbus_property))

772

inspect.getmembers(cls, self._is_dbus_property))

632

773

633

774

def _get_dbus_property(self, interface_name, property_name):

634

775

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

635

776

property with the specified name and interface.

636

777

"""

637

for name in (property_name,

638

property_name + "_dbus_property"):

639

prop = getattr(self, name, None)

640

if (prop is None

641

or not self._is_dbus_property(prop)

642

or prop._dbus_name != property_name

643

or (interface_name and prop._dbus_interface

644

and interface_name != prop._dbus_interface)):

645

continue

646

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

647

785

# No such property

648

786

raise DBusPropertyNotFound(self.dbus_object_path + ":"

649

787

+ interface_name + "."

683

821

def GetAll(self, interface_name):

684

822

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

685

823

standard.

686

824

687

825

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

688

826

"""

689

all = {}

827

properties = {}

690

828

for name, prop in self._get_all_dbus_properties():

691

829

if (interface_name

692

830

and interface_name != prop._dbus_interface):

697

835

continue

698

836

value = prop()

699

837

if not hasattr(value, "variant_level"):

700

all[name] = value

838

properties[name] = value

701

839

continue

702

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

703

value.variant_level+1)

704

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")

705

843

706

844

@dbus.service.method(dbus.INTROSPECTABLE_IFACE,

707

845

out_signature="s",

751

889

return xmlstring

752

890

753

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

754

998

class ClientDBus(Client, DBusObjectWithProperties):

755

999

"""A Client class using D-Bus

756

1000

765

1009

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

766

1010

767

1011

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

1012

self.bus = bus

1013

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

1014

768

1015

self._approvals_pending = 0

769

self.bus = bus

770

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

771

1016

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

772

1017

# the D-Bus

773

1018

client_object_name = unicode(self.name).translate(

777

1022

("/clients/" + client_object_name))

778

1023

DBusObjectWithProperties.__init__(self, self.bus,

779

1024

self.dbus_object_path)

780

def _set_expires(self, value):

781

old_value = getattr(self, "_expires", None)

782

self._expires = value

783

if hasattr(self, "dbus_object_path") and old_value != value:

784

dbus_time = (self._datetime_to_dbus(self._expires,

785

variant_level=1))

786

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

787

dbus_time)

788

expires = property(lambda self: self._expires, _set_expires)

789

del _set_expires

790

791

def _get_approvals_pending(self):

792

return self._approvals_pending

793

def _set_approvals_pending(self, value):

794

old_value = self._approvals_pending

795

self._approvals_pending = value

796

bval = bool(value)

797

if (hasattr(self, "dbus_object_path")

798

and bval is not bool(old_value)):

799

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

800

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

801

dbus_bool)

802

803

approvals_pending = property(_get_approvals_pending,

804

_set_approvals_pending)

805

del _get_approvals_pending, _set_approvals_pending

806

807

@staticmethod

808

def _datetime_to_dbus(dt, variant_level=0):

809

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

810

if dt is None:

811

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

812

return dbus.String(dt.isoformat(),

813

variant_level=variant_level)

814

815

def enable(self):

816

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

817

r = Client.enable(self)

818

if oldstate != self.enabled:

819

# Emit D-Bus signals

820

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

821

dbus.Boolean(True, variant_level=1))

822

self.PropertyChanged(

823

dbus.String("LastEnabled"),

824

self._datetime_to_dbus(self.last_enabled,

825

variant_level=1))

826

return r

827

828

def disable(self, quiet = False):

829

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

830

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

831

if not quiet and oldstate != self.enabled:

832

# Emit D-Bus signal

833

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

834

dbus.Boolean(False, variant_level=1))

835

return r

1025

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

836

1092

837

1093

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

838

1094

try:

847

1103

*args, **kwargs):

848

1104

self.checker_callback_tag = None

849

1105

self.checker = None

850

# Emit D-Bus signal

851

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

852

dbus.Boolean(False, variant_level=1))

853

1106

if os.WIFEXITED(condition):

854

1107

exitstatus = os.WEXITSTATUS(condition)

855

1108

# Emit D-Bus signal

865

1118

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

866

1119

*args, **kwargs)

867

1120

868

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

869

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

870

# Emit D-Bus signal

871

self.PropertyChanged(

872

dbus.String("LastCheckedOK"),

873

(self._datetime_to_dbus(self.last_checked_ok,

874

variant_level=1)))

875

876

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

877

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

878

# Emit D-Bus signal

879

self.PropertyChanged(

880

dbus.String("LastApprovalRequest"),

881

(self._datetime_to_dbus(self.last_approval_request,

882

variant_level=1)))

883

return r

884

885

1121

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

886

1122

old_checker = self.checker

887

1123

if self.checker is not None:

894

1130

and old_checker_pid != self.checker.pid):

895

1131

# Emit D-Bus signal

896

1132

self.CheckerStarted(self.current_checker_command)

897

self.PropertyChanged(

898

dbus.String("CheckerRunning"),

899

dbus.Boolean(True, variant_level=1))

900

1133

return r

901

1134

902

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

903

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

904

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

905

if (old_checker is not None

906

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

907

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

908

dbus.Boolean(False, variant_level=1))

909

return r

910

911

1135

def _reset_approved(self):

912

1136

self._approved = None

913

1137

return False

915

1139

def approve(self, value=True):

916

1140

self.send_changedstate()

917

1141

self._approved = value

918

gobject.timeout_add(self._timedelta_to_milliseconds

1142

gobject.timeout_add(_timedelta_to_milliseconds

919

1143

(self.approval_duration),

920

1144

self._reset_approved)

921

1145

922

1146

923

1147

## D-Bus methods, signals & properties

924

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

1148

_interface = "se.recompile.Mandos.Client"

925

1149

926

1150

## Signals

927

1151

964

1188

"D-Bus signal"

965

1189

return self.need_approval()

966

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

967

1199

## Methods

968

1200

969

1201

# Approve - method

1012

1244

def ApprovedByDefault_dbus_property(self, value=None):

1013

1245

if value is None: # get

1014

1246

return dbus.Boolean(self.approved_by_default)

1015

old_value = self.approved_by_default

1016

1247

self.approved_by_default = bool(value)

1017

# Emit D-Bus signal

1018

if old_value != self.approved_by_default:

1019

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

1020

dbus.Boolean(value, variant_level=1))

1021

1248

1022

1249

# ApprovalDelay - property

1023

1250

@dbus_service_property(_interface, signature="t",

1025

1252

def ApprovalDelay_dbus_property(self, value=None):

1026

1253

if value is None: # get

1027

1254

return dbus.UInt64(self.approval_delay_milliseconds())

1028

old_value = self.approval_delay

1029

1255

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

1030

# Emit D-Bus signal

1031

if old_value != self.approval_delay:

1032

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

1033

dbus.UInt64(value, variant_level=1))

1034

1256

1035

1257

# ApprovalDuration - property

1036

1258

@dbus_service_property(_interface, signature="t",

1037

1259

access="readwrite")

1038

1260

def ApprovalDuration_dbus_property(self, value=None):

1039

1261

if value is None: # get

1040

return dbus.UInt64(self._timedelta_to_milliseconds(

1262

return dbus.UInt64(_timedelta_to_milliseconds(

1041

1263

self.approval_duration))

1042

old_value = self.approval_duration

1043

1264

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

1044

# Emit D-Bus signal

1045

if old_value != self.approval_duration:

1046

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

1047

dbus.UInt64(value, variant_level=1))

1048

1265

1049

1266

# Name - property

1050

1267

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

1062

1279

def Host_dbus_property(self, value=None):

1063

1280

if value is None: # get

1064

1281

return dbus.String(self.host)

1065

old_value = self.host

1066

1282

self.host = value

1067

# Emit D-Bus signal

1068

if old_value != self.host:

1069

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

1070

dbus.String(value, variant_level=1))

1071

1283

1072

1284

# Created - property

1073

1285

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

1074

1286

def Created_dbus_property(self):

1075

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

1287

return datetime_to_dbus(self.created)

1076

1288

1077

1289

# LastEnabled - property

1078

1290

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

1079

1291

def LastEnabled_dbus_property(self):

1080

return self._datetime_to_dbus(self.last_enabled)

1292

return datetime_to_dbus(self.last_enabled)

1081

1293

1082

1294

# Enabled - property

1083

1295

@dbus_service_property(_interface, signature="b",

1097

1309

if value is not None:

1098

1310

self.checked_ok()

1099

1311

return

1100

return self._datetime_to_dbus(self.last_checked_ok)

1312

return datetime_to_dbus(self.last_checked_ok)

1101

1313

1102

1314

# Expires - property

1103

1315

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

1104

1316

def Expires_dbus_property(self):

1105

return self._datetime_to_dbus(self.expires)

1317

return datetime_to_dbus(self.expires)

1106

1318

1107

1319

# LastApprovalRequest - property

1108

1320

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

1109

1321

def LastApprovalRequest_dbus_property(self):

1110

return self._datetime_to_dbus(self.last_approval_request)

1322

return datetime_to_dbus(self.last_approval_request)

1111

1323

1112

1324

# Timeout - property

1113

1325

@dbus_service_property(_interface, signature="t",

1115

1327

def Timeout_dbus_property(self, value=None):

1116

1328

if value is None: # get

1117

1329

return dbus.UInt64(self.timeout_milliseconds())

1118

old_value = self.timeout

1119

1330

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

1120

# Emit D-Bus signal

1121

if old_value != self.timeout:

1122

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

1123

dbus.UInt64(value, variant_level=1))

1124

1331

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

1125

1332

return

1126

1333

# Reschedule timeout

1127

1334

gobject.source_remove(self.disable_initiator_tag)

1128

1335

self.disable_initiator_tag = None

1129

1336

self.expires = None

1130

time_to_die = (self.

1131

_timedelta_to_milliseconds((self

1132

.last_checked_ok

1133

+ self.timeout)

1134

- datetime.datetime

1135

.utcnow()))

1337

time_to_die = _timedelta_to_milliseconds((self

1338

.last_checked_ok

1339

+ self.timeout)

1340

- datetime.datetime

1341

.utcnow())

1136

1342

if time_to_die <= 0:

1137

1343

# The timeout has passed

1138

1344

self.disable()

1139

1345

else:

1140

1346

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

1141

+ datetime.timedelta(milliseconds = time_to_die))

1347

+ datetime.timedelta(milliseconds =

1348

time_to_die))

1142

1349

self.disable_initiator_tag = (gobject.timeout_add

1143

1350

(time_to_die, self.disable))

1144

1351

1145

1352

# ExtendedTimeout - property

1146

1353

@dbus_service_property(_interface, signature="t",

1147

1354

access="readwrite")

1148

1355

def ExtendedTimeout_dbus_property(self, value=None):

1149

1356

if value is None: # get

1150

1357

return dbus.UInt64(self.extended_timeout_milliseconds())

1151

old_value = self.extended_timeout

1152

1358

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

1153

# Emit D-Bus signal

1154

if old_value != self.extended_timeout:

1155

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

1156

dbus.UInt64(value, variant_level=1))

1157

1359

1158

1360

# Interval - property

1159

1361

@dbus_service_property(_interface, signature="t",

1160

1362

access="readwrite")

1161

1363

def Interval_dbus_property(self, value=None):

1162

1364

if value is None: # get

1163

1365

return dbus.UInt64(self.interval_milliseconds())

1164

old_value = self.interval

1165

1366

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

1166

# Emit D-Bus signal

1167

if old_value != self.interval:

1168

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

1169

dbus.UInt64(value, variant_level=1))

1170

1367

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

1171

1368

return

1172

# Reschedule checker run

1173

gobject.source_remove(self.checker_initiator_tag)

1174

self.checker_initiator_tag = (gobject.timeout_add

1175

(value, self.start_checker))

1176

self.start_checker() # Start one now, too

1177

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

1178

1376

# Checker - property

1179

1377

@dbus_service_property(_interface, signature="s",

1180

1378

access="readwrite")

1181

1379

def Checker_dbus_property(self, value=None):

1182

1380

if value is None: # get

1183

1381

return dbus.String(self.checker_command)

1184

old_value = self.checker_command

1185

1382

self.checker_command = value

1186

# Emit D-Bus signal

1187

if old_value != self.checker_command:

1188

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

1189

dbus.String(self.checker_command,

1190

variant_level=1))

1191

1383

1192

1384

# CheckerRunning - property

1193

1385

@dbus_service_property(_interface, signature="b",

1220

1412

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

1221

1413

if not self._pipe.recv():

1222

1414

raise KeyError()

1223

1415

1224

1416

def __getattribute__(self, name):

1225

1417

if(name == '_pipe'):

1226

1418

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

1233

1425

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

1234

1426

return self._pipe.recv()[1]

1235

1427

return func

1236

1428

1237

1429

def __setattr__(self, name, value):

1238

1430

if(name == '_pipe'):

1239

1431

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

1240

1432

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

1241

1433

1242

1434

1435

class ClientDBusTransitional(ClientDBus):

1436

__metaclass__ = AlternateDBusNamesMetaclass

1437

1438

1243

1439

class ClientHandler(socketserver.BaseRequestHandler, object):

1244

1440

"""A class to handle client connections.

1245

1441

1252

1448

unicode(self.client_address))

1253

1449

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

1254

1450

self.server.child_pipe.fileno())

1255

1451

1256

1452

session = (gnutls.connection

1257

1453

.ClientSession(self.request,

1258

1454

gnutls.connection

1259

1455

.X509Credentials()))

1260

1456

1261

1457

# Note: gnutls.connection.X509Credentials is really a

1262

1458

# generic GnuTLS certificate credentials object so long as

1263

1459

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

1264

1460

# here despite using OpenPGP certificates.

1265

1461

1266

1462

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

1267

1463

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

1268

1464

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

1274

1470

(gnutls.library.functions

1275

1471

.gnutls_priority_set_direct(session._c_object,

1276

1472

priority, None))

1277

1473

1278

1474

# Start communication using the Mandos protocol

1279

1475

# Get protocol number

1280

1476

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

1285

1481

except (ValueError, IndexError, RuntimeError) as error:

1286

1482

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

1287

1483

return

1288

1484

1289

1485

# Start GnuTLS connection

1290

1486

try:

1291

1487

session.handshake()

1295

1491

# established. Just abandon the request.

1296

1492

return

1297

1493

logger.debug("Handshake succeeded")

1298

1494

1299

1495

approval_required = False

1300

1496

try:

1301

1497

try:

1306

1502

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

1307

1503

return

1308

1504

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

1309

1505

if self.server.use_dbus:

1506

# Emit D-Bus signal

1507

client.NewRequest(str(self.client_address))

1508

1310

1509

try:

1311

1510

client = ProxyClient(child_pipe, fpr,

1312

1511

self.client_address)

1324

1523

client.name)

1325

1524

if self.server.use_dbus:

1326

1525

# Emit D-Bus signal

1327

client.Rejected("Disabled")

1526

client.Rejected("Disabled")

1328

1527

return

1329

1528

1330

1529

if client._approved or not client.approval_delay:

1347

1546

return

1348

1547

1349

1548

#wait until timeout or approved

1350

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

1351

1549

time = datetime.datetime.now()

1352

1550

client.changedstate.acquire()

1353

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

1551

(client.changedstate.wait

1552

(float(client._timedelta_to_milliseconds(delay)

1553

/ 1000)))

1354

1554

client.changedstate.release()

1355

1555

time2 = datetime.datetime.now()

1356

1556

if (time2 - time) >= delay:

1378

1578

sent, len(client.secret)

1379

1579

- (sent_size + sent))

1380

1580

sent_size += sent

1381

1581

1382

1582

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

1383

# bump the timeout as if seen

1583

# bump the timeout using extended_timeout

1384

1584

client.checked_ok(client.extended_timeout)

1385

1585

if self.server.use_dbus:

1386

1586

# Emit D-Bus signal

1454

1654

# Convert the buffer to a Python bytestring

1455

1655

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

1456

1656

# Convert the bytestring to hexadecimal notation

1457

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

1657

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

1458

1658

return hex_fpr

1459

1659

1460

1660

1466

1666

except:

1467

1667

self.handle_error(request, address)

1468

1668

self.close_request(request)

1469

1669

1470

1670

def process_request(self, request, address):

1471

1671

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

1472

multiprocessing.Process(target = self.sub_process_main,

1473

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

1474

1678

1475

1679

class MultiprocessingMixInWithPipe(MultiprocessingMixIn, object):

1476

1680

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

1480

1684

This function creates a new pipe in self.pipe

1481

1685

"""

1482

1686

parent_pipe, self.child_pipe = multiprocessing.Pipe()

1483

1484

super(MultiprocessingMixInWithPipe,

1485

self).process_request(request, client_address)

1687

1688

proc = MultiprocessingMixIn.process_request(self, request,

1689

client_address)

1486

1690

self.child_pipe.close()

1487

self.add_pipe(parent_pipe)

1488

1489

def add_pipe(self, parent_pipe):

1691

self.add_pipe(parent_pipe, proc)

1692

1693

def add_pipe(self, parent_pipe, proc):

1490

1694

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

1491

1695

raise NotImplementedError

1492

1696

1697

1493

1698

class IPv6_TCPServer(MultiprocessingMixInWithPipe,

1494

1699

socketserver.TCPServer, object):

1495

1700

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

1569

1774

self.enabled = False

1570

1775

self.clients = clients

1571

1776

if self.clients is None:

1572

self.clients = set()

1777

self.clients = {}

1573

1778

self.use_dbus = use_dbus

1574

1779

self.gnutls_priority = gnutls_priority

1575

1780

IPv6_TCPServer.__init__(self, server_address,

1579

1784

def server_activate(self):

1580

1785

if self.enabled:

1581

1786

return socketserver.TCPServer.server_activate(self)

1787

1582

1788

def enable(self):

1583

1789

self.enabled = True

1584

def add_pipe(self, parent_pipe):

1790

1791

def add_pipe(self, parent_pipe, proc):

1585

1792

# Call "handle_ipc" for both data and EOF events

1586

1793

gobject.io_add_watch(parent_pipe.fileno(),

1587

1794

gobject.IO_IN | gobject.IO_HUP,

1588

1795

functools.partial(self.handle_ipc,

1589

parent_pipe = parent_pipe))

1590

1796

parent_pipe =

1797

parent_pipe,

1798

proc = proc))

1799

1591

1800

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

1592

client_object=None):

1801

proc = None, client_object=None):

1593

1802

condition_names = {

1594

1803

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

1595

1804

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

1604

1813

for cond, name in

1605

1814

condition_names.iteritems()

1606

1815

if cond & condition)

1607

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

1816

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

1608

1817

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

1818

# Wait for other process to exit

1819

proc.join()

1609

1820

return False

1610

1821

1611

1822

# Read a request from the child

1616

1827

fpr = request[1]

1617

1828

address = request[2]

1618

1829

1619

for c in self.clients:

1830

for c in self.clients.itervalues():

1620

1831

if c.fingerprint == fpr:

1621

1832

client = c

1622

1833

break

1625

1836

"dress: %s", fpr, address)

1626

1837

if self.use_dbus:

1627

1838

# Emit D-Bus signal

1628

mandos_dbus_service.ClientNotFound(fpr, address[0])

1839

mandos_dbus_service.ClientNotFound(fpr,

1840

address[0])

1629

1841

parent_pipe.send(False)

1630

1842

return False

1631

1843

1632

1844

gobject.io_add_watch(parent_pipe.fileno(),

1633

1845

gobject.IO_IN | gobject.IO_HUP,

1634

1846

functools.partial(self.handle_ipc,

1635

parent_pipe = parent_pipe,

1636

client_object = client))

1847

parent_pipe =

1848

parent_pipe,

1849

proc = proc,

1850

client_object =

1851

client))

1637

1852

parent_pipe.send(True)

1638

# 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

1639

1855

return False

1640

1856

if command == 'funcall':

1641

1857

funcname = request[1]

1642

1858

args = request[2]

1643

1859

kwargs = request[3]

1644

1860

1645

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

1646

1861

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

1862

funcname)(*args,

1863

**kwargs)))

1864

1647

1865

if command == 'getattr':

1648

1866

attrname = request[1]

1649

1867

if callable(client_object.__getattribute__(attrname)):

1650

1868

parent_pipe.send(('function',))

1651

1869

else:

1652

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

1870

parent_pipe.send(('data', client_object

1871

.__getattribute__(attrname)))

1653

1872

1654

1873

if command == 'setattr':

1655

1874

attrname = request[1]

1656

1875

value = request[2]

1657

1876

setattr(client_object, attrname, value)

1658

1877

1659

1878

return True

1660

1879

1661

1880

1698

1917

return timevalue

1699

1918

1700

1919

1701

def if_nametoindex(interface):

1702

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

1703

1704

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

1705

global if_nametoindex

1706

try:

1707

if_nametoindex = (ctypes.cdll.LoadLibrary

1708

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

1709

.if_nametoindex)

1710

except (OSError, AttributeError):

1711

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

1712

def if_nametoindex(interface):

1713

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

1714

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

1715

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

1716

ifreq = fcntl.ioctl(s, SIOCGIFINDEX,

1717

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

1718

interface))

1719

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

1720

ifreq[16:20])[0]

1721

return interface_index

1722

return if_nametoindex(interface)

1723

1724

1725

1920

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

1726

1921

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

1727

1922

1782

1977

" system bus interface")

1783

1978

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

1784

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

1785

1986

options = parser.parse_args()

1786

1987

1787

1988

if options.check:

1800

2001

"use_dbus": "True",

1801

2002

"use_ipv6": "True",

1802

2003

"debuglevel": "",

2004

"restore": "True",

2005

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

1803

2006

}

1804

2007

1805

2008

# Parse config file for server-global settings

1822

2025

# options, if set.

1823

2026

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

1824

2027

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

1825

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

2028

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

2029

"statedir"):

1826

2030

value = getattr(options, option)

1827

2031

if value is not None:

1828

2032

server_settings[option] = value

1840

2044

debuglevel = server_settings["debuglevel"]

1841

2045

use_dbus = server_settings["use_dbus"]

1842

2046

use_ipv6 = server_settings["use_ipv6"]

1843

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

1844

2059

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

1845

2060

syslogger.setFormatter(logging.Formatter

1846

2061

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

1900

2115

if error[0] != errno.EPERM:

1901

2116

raise error

1902

2117

1903

if not debug and not debuglevel:

1904

syslogger.setLevel(logging.WARNING)

1905

console.setLevel(logging.WARNING)

1906

if debuglevel:

1907

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

1908

syslogger.setLevel(level)

1909

console.setLevel(level)

1910

1911

2118

if debug:

1912

2119

# Enable all possible GnuTLS debugging

1913

2120

1944

2151

# End of Avahi example code

1945

2152

if use_dbus:

1946

2153

try:

1947

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

2154

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

1948

2155

bus, do_not_queue=True)

2156

old_bus_name = (dbus.service.BusName

2157

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

2158

do_not_queue=True))

1949

2159

except dbus.exceptions.NameExistsException as e:

1950

2160

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

1951

2161

use_dbus = False

1952

2162

server_settings["use_dbus"] = False

1953

2163

tcp_server.use_dbus = False

1954

2164

protocol = avahi.PROTO_INET6 if use_ipv6 else avahi.PROTO_INET

1955

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

1956

servicetype = "_mandos._tcp",

1957

protocol = protocol, bus = bus)

2165

service = AvahiServiceToSyslog(name =

2166

server_settings["servicename"],

2167

servicetype = "_mandos._tcp",

2168

protocol = protocol, bus = bus)

1958

2169

if server_settings["interface"]:

1959

2170

service.interface = (if_nametoindex

1960

2171

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

1964

2175

1965

2176

client_class = Client

1966

2177

if use_dbus:

1967

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

1968

def client_config_items(config, section):

1969

special_settings = {

1970

"approved_by_default":

1971

lambda: config.getboolean(section,

1972

"approved_by_default"),

1973

}

1974

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

1975

2284

try:

1976

yield (name, special_settings[name]())

1977

except KeyError:

1978

yield (name, value)

1979

1980

tcp_server.clients.update(set(

1981

client_class(name = section,

1982

config= dict(client_config_items(

1983

client_config, section)))

1984

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

1985

2305

if not tcp_server.clients:

1986

2306

logger.warning("No clients defined")

1987

2307

2000

2320

del pidfilename

2001

2321

2002

2322

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

2003

2323

2004

2324

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

2005

2325

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

2006

2326

2009

2329

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

2010

2330

def __init__(self):

2011

2331

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

2012

_interface = "se.bsnet.fukt.Mandos"

2332

_interface = "se.recompile.Mandos"

2013

2333

2014

2334

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

2015

2335

def ClientAdded(self, objpath):

2030

2350

def GetAllClients(self):

2031

2351

"D-Bus method"

2032

2352

return dbus.Array(c.dbus_object_path

2033

for c in tcp_server.clients)

2353

for c in

2354

tcp_server.clients.itervalues())

2034

2355

2035

2356

@dbus.service.method(_interface,

2036

2357

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

2038

2359

"D-Bus method"

2039

2360

return dbus.Dictionary(

2040

2361

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

2041

for c in tcp_server.clients),

2362

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

2042

2363

signature="oa{sv}")

2043

2364

2044

2365

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

2045

2366

def RemoveClient(self, object_path):

2046

2367

"D-Bus method"

2047

for c in tcp_server.clients:

2368

for c in tcp_server.clients.itervalues():

2048

2369

if c.dbus_object_path == object_path:

2049

tcp_server.clients.remove(c)

2370

del tcp_server.clients[c.name]

2050

2371

c.remove_from_connection()

2051

2372

# Don't signal anything except ClientRemoved

2052

2373

c.disable(quiet=True)

2057

2378

2058

2379

del _interface

2059

2380

2060

mandos_dbus_service = MandosDBusService()

2381

class MandosDBusServiceTransitional(MandosDBusService):

2382

__metaclass__ = AlternateDBusNamesMetaclass

2383

mandos_dbus_service = MandosDBusServiceTransitional()

2061

2384

2062

2385

def cleanup():

2063

2386

"Cleanup function; run on exit"

2064

2387

service.cleanup()

2065

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

2066

2432

while tcp_server.clients:

2067

client = tcp_server.clients.pop()

2433

name, client = tcp_server.clients.popitem()

2068

2434

if use_dbus:

2069

2435

client.remove_from_connection()

2070

client.disable_hook = None

2071

2436

# Don't signal anything except ClientRemoved

2072

2437

client.disable(quiet=True)

2073

2438

if use_dbus:

2074

2439

# Emit D-Bus signal

2075

mandos_dbus_service.ClientRemoved(client.dbus_object_path,

2440

mandos_dbus_service.ClientRemoved(client

2441

.dbus_object_path,

2076

2442

client.name)

2443

client_settings.clear()

2077

2444

2078

2445

atexit.register(cleanup)

2079

2446

2080

for client in tcp_server.clients:

2447

for client in tcp_server.clients.itervalues():

2081

2448

if use_dbus:

2082

2449

# Emit D-Bus signal

2083

2450

mandos_dbus_service.ClientAdded(client.dbus_object_path)

2084

client.enable()

2451

# Need to initiate checking of clients

2452

if client.enabled:

2453

client.init_checker()

2085

2454

2086

2455

tcp_server.enable()

2087

2456

tcp_server.server_activate()

2127

2496

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

2128

2497

cleanup()

2129

2498

2499

2130

2500

if __name__ == '__main__':

2131

2501

main()