/mandos/trunk : revision 24.1.172

28

# along with this program. If not, see

29

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

30

#

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

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

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#

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34

from __future__ import (division, absolute_import, print_function,

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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65

69

66

import dbus

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67

import dbus.service

75

72

import ctypes.util

76

73

import xml.dom.minidom

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74

import inspect

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import GnuPGInterface

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75

80

76

try:

81

77

SO_BINDTODEVICE = socket.SO_BINDTODEVICE

86

82

SO_BINDTODEVICE = None

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83

88

84

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version = "1.4.1"

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stored_state_file = "clients.pickle"

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version = "1.3.0"

91

86

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logger = logging.getLogger()

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#logger = logging.getLogger('mandos')

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logger = logging.Logger('mandos')

93

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syslogger = (logging.handlers.SysLogHandler

94

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(facility = logging.handlers.SysLogHandler.LOG_DAEMON,

95

91

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

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):

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

104

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

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

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ifreq = fcntl.ioctl(s, SIOCGIFINDEX,

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

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interface))

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

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ifreq[16:20])[0]

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return interface_index

112

113

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def initlogger(level=logging.WARNING):

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"""init logger and add loglevel"""

116

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syslogger.setFormatter(logging.Formatter

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

119

' %(message)s'))

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logger.addHandler(syslogger)

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console = logging.StreamHandler()

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

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' [%(process)d]:'

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' %(levelname)s:'

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' %(message)s'))

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logger.addHandler(console)

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logger.setLevel(level)

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130

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class PGPError(Exception):

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"""Exception if encryption/decryption fails"""

133

pass

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135

136

class PGPEngine(object):

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

138

def __init__(self):

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self.gnupg = GnuPGInterface.GnuPG()

140

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',

145

'--quiet'])

146

147

def __enter__(self):

148

return self

149

150

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

151

self._cleanup()

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return False

153

154

def __del__(self):

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self._cleanup()

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157

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):

162

for filename in files:

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

164

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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170

def password_encode(self, password):

171

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

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

173

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

174

175

def encrypt(self, data, password):

176

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

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with open(os.devnull) as devnull:

178

try:

179

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

180

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

181

attach_fhs={'stderr': devnull})

182

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

183

f.write(data)

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

185

ciphertext = f.read()

186

proc.wait()

187

except IOError as e:

188

raise PGPError(e)

189

self.gnupg.passphrase = None

190

return ciphertext

191

192

def decrypt(self, data, password):

193

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

194

with open(os.devnull) as devnull:

195

try:

196

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

197

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

198

attach_fhs={'stderr': devnull})

199

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

200

f.write(data)

201

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

202

decrypted_plaintext = f.read()

203

proc.wait()

204

except IOError as e:

205

raise PGPError(e)

206

self.gnupg.passphrase = None

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return decrypted_plaintext

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209

92

syslogger.setFormatter(logging.Formatter

93

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

94

' %(message)s'))

95

logger.addHandler(syslogger)

96

97

console = logging.StreamHandler()

98

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

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' %(levelname)s:'

100

' %(message)s'))

101

logger.addHandler(console)

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102

211

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class AvahiError(Exception):

212

104

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

267

159

" after %i retries, exiting.",

268

160

self.rename_count)

269

161

raise AvahiServiceError("Too many renames")

270

self.name = unicode(self.server

271

.GetAlternativeServiceName(self.name))

162

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

272

163

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

273

164

self.name)

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syslogger.setFormatter(logging.Formatter

166

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

167

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

168

% self.name))

274

169

self.remove()

275

170

try:

276

171

self.add()

296

191

avahi.DBUS_INTERFACE_ENTRY_GROUP)

297

192

self.entry_group_state_changed_match = (

298

193

self.group.connect_to_signal(

299

'StateChanged', self.entry_group_state_changed))

194

'StateChanged', self .entry_group_state_changed))

300

195

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

301

196

self.name, self.type)

302

197

self.group.AddService(

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223

try:

329

224

self.group.Free()

330

225

except (dbus.exceptions.UnknownMethodException,

331

dbus.exceptions.DBusException):

226

dbus.exceptions.DBusException) as e:

332

227

pass

333

228

self.group = None

334

229

self.remove()

368

263

self.server_state_changed)

369

264

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

370

265

371

class AvahiServiceToSyslog(AvahiService):

372

def rename(self):

373

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

374

ret = AvahiService.rename(self)

375

syslogger.setFormatter(logging.Formatter

376

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

377

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

378

% self.name))

379

return ret

380

266

381

def timedelta_to_milliseconds(td):

382

"Convert a datetime.timedelta() to milliseconds"

383

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

384

+ (td.seconds * 1000)

385

+ (td.microseconds // 1000))

386

387

267

class Client(object):

388

268

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

389

269

390

270

Attributes:

391

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

271

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

392

272

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

393

273

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

394

274

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

401

281

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

402

282

checker_initiator_tag: a gobject event source tag, or None

403

283

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

404

client_structure: Object describing what attributes a client has

405

and is used for storing the client at exit

406

284

current_checker_command: string; current running checker_command

285

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

407

286

disable_initiator_tag: a gobject event source tag, or None

408

287

enabled: bool()

409

288

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

412

291

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

413

292

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

414

293

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

415

416

last_checker_status: integer between 0 and 255 reflecting exit

417

status of last checker. -1 reflects crashed

418

checker, or None.

419

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

294

last_enabled: datetime.datetime(); (UTC)

420

295

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

421

296

D-Bus identifiers

422

297

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

423

298

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

424

299

until this client is disabled

425

extended_timeout: extra long timeout when password has been sent

426

300

runtime_expansions: Allowed attributes for runtime expansion.

427

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

428

disabled, or None

429

301

"""

430

302

431

303

runtime_expansions = ("approval_delay", "approval_duration",

433

305

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

434

306

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

435

307

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

436

315

def timeout_milliseconds(self):

437

316

"Return the 'timeout' attribute in milliseconds"

438

return timedelta_to_milliseconds(self.timeout)

439

440

def extended_timeout_milliseconds(self):

441

"Return the 'extended_timeout' attribute in milliseconds"

442

return timedelta_to_milliseconds(self.extended_timeout)

317

return self._timedelta_to_milliseconds(self.timeout)

443

318

444

319

def interval_milliseconds(self):

445

320

"Return the 'interval' attribute in milliseconds"

446

return timedelta_to_milliseconds(self.interval)

447

321

return self._timedelta_to_milliseconds(self.interval)

322

448

323

def approval_delay_milliseconds(self):

449

return timedelta_to_milliseconds(self.approval_delay)

324

return self._timedelta_to_milliseconds(self.approval_delay)

450

325

451

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

326

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

452

327

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

453

328

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

454

329

attribute."""

474

349

% self.name)

475

350

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

476

351

self.created = datetime.datetime.utcnow()

477

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

352

self.enabled = False

478

353

self.last_approval_request = None

479

if self.enabled:

480

self.last_enabled = datetime.datetime.utcnow()

481

else:

482

self.last_enabled = None

354

self.last_enabled = None

483

355

self.last_checked_ok = None

484

self.last_checker_status = None

485

356

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

486

self.extended_timeout = string_to_delta(config

487

["extended_timeout"])

488

357

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

358

self.disable_hook = disable_hook

489

359

self.checker = None

490

360

self.checker_initiator_tag = None

491

361

self.disable_initiator_tag = None

492

if self.enabled:

493

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

494

else:

495

self.expires = None

496

362

self.checker_callback_tag = None

497

363

self.checker_command = config["checker"]

498

364

self.current_checker_command = None

499

self.approved = None

365

self.last_connect = None

366

self._approved = None

500

367

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

501

368

True)

502

369

self.approvals_pending = 0

504

371

config["approval_delay"])

505

372

self.approval_duration = string_to_delta(

506

373

config["approval_duration"])

507

self.changedstate = (multiprocessing_manager

508

.Condition(multiprocessing_manager

509

.Lock()))

510

self.client_structure = [attr for attr in

511

self.__dict__.iterkeys()

512

if not attr.startswith("_")]

513

self.client_structure.append("client_structure")

514

515

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

516

lambda obj:

517

isinstance(obj,

518

property)):

519

if not name.startswith("_"):

520

self.client_structure.append(name)

374

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

521

375

522

# Send notice to process children that client state has changed

523

376

def send_changedstate(self):

524

with self.changedstate:

525

self.changedstate.notify_all()

526

377

self.changedstate.acquire()

378

self.changedstate.notify_all()

379

self.changedstate.release()

380

527

381

def enable(self):

528

382

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

529

383

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

530

384

# Already enabled

531

385

return

532

386

self.send_changedstate()

533

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

534

self.enabled = True

535

387

self.last_enabled = datetime.datetime.utcnow()

536

self.init_checker()

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()

537

400

538

401

def disable(self, quiet=True):

539

402

"""Disable this client."""

546

409

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

547

410

gobject.source_remove(self.disable_initiator_tag)

548

411

self.disable_initiator_tag = None

549

self.expires = None

550

412

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

551

413

gobject.source_remove(self.checker_initiator_tag)

552

414

self.checker_initiator_tag = None

553

415

self.stop_checker()

416

if self.disable_hook:

417

self.disable_hook(self)

554

418

self.enabled = False

555

419

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

556

420

return False

557

421

558

422

def __del__(self):

423

self.disable_hook = None

559

424

self.disable()

560

425

561

def init_checker(self):

562

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

563

# and every interval from then on.

564

self.checker_initiator_tag = (gobject.timeout_add

565

(self.interval_milliseconds(),

566

self.start_checker))

567

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

568

self.disable_initiator_tag = (gobject.timeout_add

569

(self.timeout_milliseconds(),

570

self.disable))

571

# Also start a new checker *right now*.

572

self.start_checker()

573

574

426

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

575

427

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

576

428

self.checker_callback_tag = None

577

429

self.checker = None

578

430

if os.WIFEXITED(condition):

579

self.last_checker_status = os.WEXITSTATUS(condition)

580

if self.last_checker_status == 0:

431

exitstatus = os.WEXITSTATUS(condition)

432

if exitstatus == 0:

581

433

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

582

434

vars(self))

583

435

self.checked_ok()

585

437

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

586

438

vars(self))

587

439

else:

588

self.last_checker_status = -1

589

440

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

590

441

vars(self))

591

442

592

def checked_ok(self, timeout=None):

443

def checked_ok(self):

593

444

"""Bump up the timeout for this client.

594

445

595

446

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

596

447

alive and well.

597

448

"""

598

if timeout is None:

599

timeout = self.timeout

600

449

self.last_checked_ok = datetime.datetime.utcnow()

601

if self.disable_initiator_tag is not None:

602

gobject.source_remove(self.disable_initiator_tag)

603

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

604

self.disable_initiator_tag = (gobject.timeout_add

605

(timedelta_to_milliseconds

606

(timeout), self.disable))

607

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

450

gobject.source_remove(self.disable_initiator_tag)

451

self.disable_initiator_tag = (gobject.timeout_add

452

(self.timeout_milliseconds(),

453

self.disable))

608

454

609

455

def need_approval(self):

610

456

self.last_approval_request = datetime.datetime.utcnow()

650

496

'replace')))

651

497

for attr in

652

498

self.runtime_expansions)

653

499

654

500

try:

655

501

command = self.checker_command % escaped_attrs

656

502

except TypeError as error:

702

548

raise

703

549

self.checker = None

704

550

705

706

551

def dbus_service_property(dbus_interface, signature="v",

707

552

access="readwrite", byte_arrays=False):

708

553

"""Decorators for marking methods of a DBusObjectWithProperties to

754

599

755

600

class DBusObjectWithProperties(dbus.service.Object):

756

601

"""A D-Bus object with properties.

757

602

758

603

Classes inheriting from this can use the dbus_service_property

759

604

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

760

605

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

767

612

def _get_all_dbus_properties(self):

768

613

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

769

614

"""

770

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

771

for cls in self.__class__.__mro__

615

return ((prop._dbus_name, prop)

772

616

for name, prop in

773

inspect.getmembers(cls, self._is_dbus_property))

617

inspect.getmembers(self, self._is_dbus_property))

774

618

775

619

def _get_dbus_property(self, interface_name, property_name):

776

620

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

777

621

property with the specified name and interface.

778

622

"""

779

for cls in self.__class__.__mro__:

780

for name, value in (inspect.getmembers

781

(cls, self._is_dbus_property)):

782

if (value._dbus_name == property_name

783

and value._dbus_interface == interface_name):

784

return value.__get__(self)

785

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

786

633

# No such property

787

634

raise DBusPropertyNotFound(self.dbus_object_path + ":"

788

635

+ interface_name + "."

822

669

def GetAll(self, interface_name):

823

670

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

824

671

standard.

825

672

826

673

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

827

674

"""

828

properties = {}

675

all = {}

829

676

for name, prop in self._get_all_dbus_properties():

830

677

if (interface_name

831

678

and interface_name != prop._dbus_interface):

836

683

continue

837

684

value = prop()

838

685

if not hasattr(value, "variant_level"):

839

properties[name] = value

686

all[name] = value

840

687

continue

841

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

842

value.variant_level+1)

843

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

688

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

689

value.variant_level+1)

690

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

844

691

845

692

@dbus.service.method(dbus.INTROSPECTABLE_IFACE,

846

693

out_signature="s",

890

737

return xmlstring

891

738

892

739

893

def datetime_to_dbus (dt, variant_level=0):

894

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

895

if dt is None:

896

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

897

return dbus.String(dt.isoformat(),

898

variant_level=variant_level)

899

900

901

class AlternateDBusNamesMetaclass(DBusObjectWithProperties

902

.__metaclass__):

903

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

904

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

905

"""

906

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

907

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

908

# methods, signals, or properties in them

909

for base in (b for b in bases

910

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

911

# Go though all attributes of the base class

912

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

913

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

914

# with the wrong interface name

915

if (not hasattr(attribute, "_dbus_interface")

916

or not attribute._dbus_interface

917

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

918

continue

919

# Create an alternate D-Bus interface name based on

920

# the current name

921

alt_interface = (attribute._dbus_interface

922

.replace("se.recompile.Mandos",

923

"se.bsnet.fukt.Mandos"))

924

# Is this a D-Bus signal?

925

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

926

# Extract the original non-method function by

927

# black magic

928

nonmethod_func = (dict(

929

zip(attribute.func_code.co_freevars,

930

attribute.__closure__))["func"]

931

.cell_contents)

932

# Create a new, but exactly alike, function

933

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

934

# with the alternate D-Bus interface name

935

new_function = (dbus.service.signal

936

(alt_interface,

937

attribute._dbus_signature)

938

(types.FunctionType(

939

nonmethod_func.func_code,

940

nonmethod_func.func_globals,

941

nonmethod_func.func_name,

942

nonmethod_func.func_defaults,

943

nonmethod_func.func_closure)))

944

# Define a creator of a function to call both the

945

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

946

# signals gets sent when the function is called

947

def fixscope(func1, func2):

948

"""This function is a scope container to pass

949

func1 and func2 to the "call_both" function

950

outside of its arguments"""

951

def call_both(*args, **kwargs):

952

"""This function will emit two D-Bus

953

signals by calling func1 and func2"""

954

func1(*args, **kwargs)

955

func2(*args, **kwargs)

956

return call_both

957

# Create the "call_both" function and add it to

958

# the class

959

attr[attrname] = fixscope(attribute,

960

new_function)

961

# Is this a D-Bus method?

962

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

963

# Create a new, but exactly alike, function

964

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

965

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

966

# to the class.

967

attr[attrname] = (dbus.service.method

968

(alt_interface,

969

attribute._dbus_in_signature,

970

attribute._dbus_out_signature)

971

(types.FunctionType

972

(attribute.func_code,

973

attribute.func_globals,

974

attribute.func_name,

975

attribute.func_defaults,

976

attribute.func_closure)))

977

# Is this a D-Bus property?

978

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

979

# Create a new, but exactly alike, function

980

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

981

# property with the alternate D-Bus interface

982

# name. Add it to the class.

983

attr[attrname] = (dbus_service_property

984

(alt_interface,

985

attribute._dbus_signature,

986

attribute._dbus_access,

987

attribute

988

._dbus_get_args_options

989

["byte_arrays"])

990

(types.FunctionType

991

(attribute.func_code,

992

attribute.func_globals,

993

attribute.func_name,

994

attribute.func_defaults,

995

attribute.func_closure)))

996

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

997

998

999

740

class ClientDBus(Client, DBusObjectWithProperties):

1000

741

"""A Client class using D-Bus

1001

742

1010

751

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

1011

752

1012

753

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

754

self._approvals_pending = 0

1013

755

self.bus = bus

1014

756

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

1015

1016

self._approvals_pending = 0

1017

757

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

1018

758

# the D-Bus

1019

759

client_object_name = unicode(self.name).translate(

1024

764

DBusObjectWithProperties.__init__(self, self.bus,

1025

765

self.dbus_object_path)

1026

766

1027

def notifychangeproperty(transform_func,

1028

dbus_name, type_func=lambda x: x,

1029

variant_level=1):

1030

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

1031

its changes to DBus.

1032

1033

transform_fun: Function that takes a value and a variant_level

1034

and transforms it to a D-Bus type.

1035

dbus_name: D-Bus name of the variable

1036

type_func: Function that transform the value before sending it

1037

to the D-Bus. Default: no transform

1038

variant_level: D-Bus variant level. Default: 1

1039

"""

1040

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

1041

def setter(self, value):

1042

if hasattr(self, "dbus_object_path"):

1043

if (not hasattr(self, attrname) or

1044

type_func(getattr(self, attrname, None))

1045

!= type_func(value)):

1046

dbus_value = transform_func(type_func(value),

1047

variant_level

1048

=variant_level)

1049

self.PropertyChanged(dbus.String(dbus_name),

1050

dbus_value)

1051

setattr(self, attrname, value)

1052

1053

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

1054

1055

1056

expires = notifychangeproperty(datetime_to_dbus, "Expires")

1057

approvals_pending = notifychangeproperty(dbus.Boolean,

1058

"ApprovalPending",

1059

type_func = bool)

1060

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

1061

last_enabled = notifychangeproperty(datetime_to_dbus,

1062

"LastEnabled")

1063

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

1064

type_func = lambda checker:

1065

checker is not None)

1066

last_checked_ok = notifychangeproperty(datetime_to_dbus,

1067

"LastCheckedOK")

1068

last_approval_request = notifychangeproperty(

1069

datetime_to_dbus, "LastApprovalRequest")

1070

approved_by_default = notifychangeproperty(dbus.Boolean,

1071

"ApprovedByDefault")

1072

approval_delay = notifychangeproperty(dbus.UInt16,

1073

"ApprovalDelay",

1074

type_func =

1075

timedelta_to_milliseconds)

1076

approval_duration = notifychangeproperty(

1077

dbus.UInt16, "ApprovalDuration",

1078

type_func = timedelta_to_milliseconds)

1079

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

1080

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

1081

type_func =

1082

timedelta_to_milliseconds)

1083

extended_timeout = notifychangeproperty(

1084

dbus.UInt16, "ExtendedTimeout",

1085

type_func = timedelta_to_milliseconds)

1086

interval = notifychangeproperty(dbus.UInt16,

1087

"Interval",

1088

type_func =

1089

timedelta_to_milliseconds)

1090

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

1091

1092

del notifychangeproperty

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

1093

810

1094

811

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

1095

812

try:

1104

821

*args, **kwargs):

1105

822

self.checker_callback_tag = None

1106

823

self.checker = None

824

# Emit D-Bus signal

825

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

826

dbus.Boolean(False, variant_level=1))

1107

827

if os.WIFEXITED(condition):

1108

828

exitstatus = os.WEXITSTATUS(condition)

1109

829

# Emit D-Bus signal

1119

839

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

1120

840

*args, **kwargs)

1121

841

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

1122

859

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

1123

860

old_checker = self.checker

1124

861

if self.checker is not None:

1131

868

and old_checker_pid != self.checker.pid):

1132

869

# Emit D-Bus signal

1133

870

self.CheckerStarted(self.current_checker_command)

871

self.PropertyChanged(

872

dbus.String("CheckerRunning"),

873

dbus.Boolean(True, variant_level=1))

1134

874

return r

1135

875

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

1136

885

def _reset_approved(self):

1137

self.approved = None

886

self._approved = None

1138

887

return False

1139

888

1140

889

def approve(self, value=True):

1141

890

self.send_changedstate()

1142

self.approved = value

1143

gobject.timeout_add(timedelta_to_milliseconds

891

self._approved = value

892

gobject.timeout_add(self._timedelta_to_milliseconds

1144

893

(self.approval_duration),

1145

894

self._reset_approved)

1146

895

1147

896

1148

897

## D-Bus methods, signals & properties

1149

_interface = "se.recompile.Mandos.Client"

898

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

1150

899

1151

900

## Signals

1152

901

1189

938

"D-Bus signal"

1190

939

return self.need_approval()

1191

940

1192

# NeRwequest - signal

1193

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

1194

def NewRequest(self, ip):

1195

"""D-Bus signal

1196

Is sent after a client request a password.

1197

"""

1198

pass

1199

1200

941

## Methods

1201

942

1202

943

# Approve - method

1246

987

if value is None: # get

1247

988

return dbus.Boolean(self.approved_by_default)

1248

989

self.approved_by_default = bool(value)

990

# Emit D-Bus signal

991

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

992

dbus.Boolean(value, variant_level=1))

1249

993

1250

994

# ApprovalDelay - property

1251

995

@dbus_service_property(_interface, signature="t",

1254

998

if value is None: # get

1255

999

return dbus.UInt64(self.approval_delay_milliseconds())

1256

1000

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))

1257

1004

1258

1005

# ApprovalDuration - property

1259

1006

@dbus_service_property(_interface, signature="t",

1260

1007

access="readwrite")

1261

1008

def ApprovalDuration_dbus_property(self, value=None):

1262

1009

if value is None: # get

1263

return dbus.UInt64(timedelta_to_milliseconds(

1010

return dbus.UInt64(self._timedelta_to_milliseconds(

1264

1011

self.approval_duration))

1265

1012

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))

1266

1016

1267

1017

# Name - property

1268

1018

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

1281

1031

if value is None: # get

1282

1032

return dbus.String(self.host)

1283

1033

self.host = value

1034

# Emit D-Bus signal

1035

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

1036

dbus.String(value, variant_level=1))

1284

1037

1285

1038

# Created - property

1286

1039

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

1287

1040

def Created_dbus_property(self):

1288

return datetime_to_dbus(self.created)

1041

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

1289

1042

1290

1043

# LastEnabled - property

1291

1044

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

1292

1045

def LastEnabled_dbus_property(self):

1293

return datetime_to_dbus(self.last_enabled)

1046

if self.last_enabled is None:

1047

return dbus.String("")

1048

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

1294

1049

1295

1050

# Enabled - property

1296

1051

@dbus_service_property(_interface, signature="b",

1310

1065

if value is not None:

1311

1066

self.checked_ok()

1312

1067

return

1313

return datetime_to_dbus(self.last_checked_ok)

1314

1315

# Expires - property

1316

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

1317

def Expires_dbus_property(self):

1318

return datetime_to_dbus(self.expires)

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))

1319

1072

1320

1073

# LastApprovalRequest - property

1321

1074

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

1322

1075

def LastApprovalRequest_dbus_property(self):

1323

return datetime_to_dbus(self.last_approval_request)

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))

1324

1081

1325

1082

# Timeout - property

1326

1083

@dbus_service_property(_interface, signature="t",

1329

1086

if value is None: # get

1330

1087

return dbus.UInt64(self.timeout_milliseconds())

1331

1088

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))

1332

1092

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

1333

1093

return

1334

1094

# Reschedule timeout

1335

1095

gobject.source_remove(self.disable_initiator_tag)

1336

1096

self.disable_initiator_tag = None

1337

self.expires = None

1338

time_to_die = timedelta_to_milliseconds((self

1339

.last_checked_ok

1340

+ self.timeout)

1341

- datetime.datetime

1342

.utcnow())

1097

time_to_die = (self.

1098

_timedelta_to_milliseconds((self

1099

.last_checked_ok

1100

+ self.timeout)

1101

- datetime.datetime

1102

.utcnow()))

1343

1103

if time_to_die <= 0:

1344

1104

# The timeout has passed

1345

1105

self.disable()

1346

1106

else:

1347

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

1348

+ datetime.timedelta(milliseconds =

1349

time_to_die))

1350

1107

self.disable_initiator_tag = (gobject.timeout_add

1351

1108

(time_to_die, self.disable))

1352

1109

1353

# ExtendedTimeout - property

1354

@dbus_service_property(_interface, signature="t",

1355

access="readwrite")

1356

def ExtendedTimeout_dbus_property(self, value=None):

1357

if value is None: # get

1358

return dbus.UInt64(self.extended_timeout_milliseconds())

1359

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

1360

1361

1110

# Interval - property

1362

1111

@dbus_service_property(_interface, signature="t",

1363

1112

access="readwrite")

1365

1114

if value is None: # get

1366

1115

return dbus.UInt64(self.interval_milliseconds())

1367

1116

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))

1368

1120

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

1369

1121

return

1370

if self.enabled:

1371

# Reschedule checker run

1372

gobject.source_remove(self.checker_initiator_tag)

1373

self.checker_initiator_tag = (gobject.timeout_add

1374

(value, self.start_checker))

1375

self.start_checker() # Start one now, too

1376

1122

# Reschedule checker run

1123

gobject.source_remove(self.checker_initiator_tag)

1124

self.checker_initiator_tag = (gobject.timeout_add

1125

(value, self.start_checker))

1126

self.start_checker() # Start one now, too

1127

1377

1128

# Checker - property

1378

1129

@dbus_service_property(_interface, signature="s",

1379

1130

access="readwrite")

1381

1132

if value is None: # get

1382

1133

return dbus.String(self.checker_command)

1383

1134

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))

1384

1139

1385

1140

# CheckerRunning - property

1386

1141

@dbus_service_property(_interface, signature="b",

1413

1168

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

1414

1169

if not self._pipe.recv():

1415

1170

raise KeyError()

1416

1171

1417

1172

def __getattribute__(self, name):

1418

if name == '_pipe':

1173

if(name == '_pipe'):

1419

1174

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

1420

1175

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

1421

1176

data = self._pipe.recv()

1426

1181

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

1427

1182

return self._pipe.recv()[1]

1428

1183

return func

1429

1184

1430

1185

def __setattr__(self, name, value):

1431

if name == '_pipe':

1186

if(name == '_pipe'):

1432

1187

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

1433

1188

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

1434

1189

1435

1190

1436

class ClientDBusTransitional(ClientDBus):

1437

__metaclass__ = AlternateDBusNamesMetaclass

1438

1439

1440

1191

class ClientHandler(socketserver.BaseRequestHandler, object):

1441

1192

"""A class to handle client connections.

1442

1193

1449

1200

unicode(self.client_address))

1450

1201

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

1451

1202

self.server.child_pipe.fileno())

1452

1203

1453

1204

session = (gnutls.connection

1454

1205

.ClientSession(self.request,

1455

1206

gnutls.connection

1456

1207

.X509Credentials()))

1457

1208

1458

1209

# Note: gnutls.connection.X509Credentials is really a

1459

1210

# generic GnuTLS certificate credentials object so long as

1460

1211

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

1461

1212

# here despite using OpenPGP certificates.

1462

1213

1463

1214

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

1464

1215

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

1465

1216

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

1471

1222

(gnutls.library.functions

1472

1223

.gnutls_priority_set_direct(session._c_object,

1473

1224

priority, None))

1474

1225

1475

1226

# Start communication using the Mandos protocol

1476

1227

# Get protocol number

1477

1228

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

1482

1233

except (ValueError, IndexError, RuntimeError) as error:

1483

1234

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

1484

1235

return

1485

1236

1486

1237

# Start GnuTLS connection

1487

1238

try:

1488

1239

session.handshake()

1492

1243

# established. Just abandon the request.

1493

1244

return

1494

1245

logger.debug("Handshake succeeded")

1495

1246

1496

1247

approval_required = False

1497

1248

try:

1498

1249

try:

1503

1254

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

1504

1255

return

1505

1256

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

1506

1257

1507

1258

try:

1508

1259

client = ProxyClient(child_pipe, fpr,

1509

1260

self.client_address)

1510

1261

except KeyError:

1511

1262

return

1512

1263

1513

if self.server.use_dbus:

1514

# Emit D-Bus signal

1515

client.NewRequest(str(self.client_address))

1516

1517

1264

if client.approval_delay:

1518

1265

delay = client.approval_delay

1519

1266

client.approvals_pending += 1

1521

1268

1522

1269

while True:

1523

1270

if not client.enabled:

1524

logger.info("Client %s is disabled",

1271

logger.warning("Client %s is disabled",

1525

1272

client.name)

1526

1273

if self.server.use_dbus:

1527

1274

# Emit D-Bus signal

1528

client.Rejected("Disabled")

1275

client.Rejected("Disabled")

1529

1276

return

1530

1277

1531

if client.approved or not client.approval_delay:

1278

if client._approved or not client.approval_delay:

1532

1279

#We are approved or approval is disabled

1533

1280

break

1534

elif client.approved is None:

1281

elif client._approved is None:

1535

1282

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

1536

1283

client.name)

1537

1284

if self.server.use_dbus:

1548

1295

return

1549

1296

1550

1297

#wait until timeout or approved

1298

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

1551

1299

time = datetime.datetime.now()

1552

1300

client.changedstate.acquire()

1553

(client.changedstate.wait

1554

(float(client.timedelta_to_milliseconds(delay)

1555

/ 1000)))

1301

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

1556

1302

client.changedstate.release()

1557

1303

time2 = datetime.datetime.now()

1558

1304

if (time2 - time) >= delay:

1580

1326

sent, len(client.secret)

1581

1327

- (sent_size + sent))

1582

1328

sent_size += sent

1583

1329

1584

1330

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

1585

# bump the timeout using extended_timeout

1586

client.checked_ok(client.extended_timeout)

1331

# bump the timeout as if seen

1332

client.checked_ok()

1587

1333

if self.server.use_dbus:

1588

1334

# Emit D-Bus signal

1589

1335

client.GotSecret()

1656

1402

# Convert the buffer to a Python bytestring

1657

1403

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

1658

1404

# Convert the bytestring to hexadecimal notation

1659

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

1405

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

1660

1406

return hex_fpr

1661

1407

1662

1408

1668

1414

except:

1669

1415

self.handle_error(request, address)

1670

1416

self.close_request(request)

1671

1417

1672

1418

def process_request(self, request, address):

1673

1419

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

1674

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

1675

args = (request,

1676

address))

1677

proc.start()

1678

return proc

1679

1420

multiprocessing.Process(target = self.sub_process_main,

1421

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

1680

1422

1681

1423

class MultiprocessingMixInWithPipe(MultiprocessingMixIn, object):

1682

1424

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

1686

1428

This function creates a new pipe in self.pipe

1687

1429

"""

1688

1430

parent_pipe, self.child_pipe = multiprocessing.Pipe()

1689

1690

proc = MultiprocessingMixIn.process_request(self, request,

1691

client_address)

1431

1432

super(MultiprocessingMixInWithPipe,

1433

self).process_request(request, client_address)

1692

1434

self.child_pipe.close()

1693

self.add_pipe(parent_pipe, proc)

1694

1695

def add_pipe(self, parent_pipe, proc):

1435

self.add_pipe(parent_pipe)

1436

1437

def add_pipe(self, parent_pipe):

1696

1438

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

1697

1439

raise NotImplementedError

1698

1440

1699

1700

1441

class IPv6_TCPServer(MultiprocessingMixInWithPipe,

1701

1442

socketserver.TCPServer, object):

1702

1443

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

1776

1517

self.enabled = False

1777

1518

self.clients = clients

1778

1519

if self.clients is None:

1779

self.clients = {}

1520

self.clients = set()

1780

1521

self.use_dbus = use_dbus

1781

1522

self.gnutls_priority = gnutls_priority

1782

1523

IPv6_TCPServer.__init__(self, server_address,

1786

1527

def server_activate(self):

1787

1528

if self.enabled:

1788

1529

return socketserver.TCPServer.server_activate(self)

1789

1790

1530

def enable(self):

1791

1531

self.enabled = True

1792

1793

def add_pipe(self, parent_pipe, proc):

1532

def add_pipe(self, parent_pipe):

1794

1533

# Call "handle_ipc" for both data and EOF events

1795

1534

gobject.io_add_watch(parent_pipe.fileno(),

1796

1535

gobject.IO_IN | gobject.IO_HUP,

1797

1536

functools.partial(self.handle_ipc,

1798

parent_pipe =

1799

parent_pipe,

1800

proc = proc))

1801

1537

parent_pipe = parent_pipe))

1538

1802

1539

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

1803

proc = None, client_object=None):

1540

client_object=None):

1804

1541

condition_names = {

1805

1542

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

1806

1543

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

1815

1552

for cond, name in

1816

1553

condition_names.iteritems()

1817

1554

if cond & condition)

1818

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

1555

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

1819

1556

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

1820

# Wait for other process to exit

1821

proc.join()

1822

1557

return False

1823

1558

1824

1559

# Read a request from the child

1829

1564

fpr = request[1]

1830

1565

address = request[2]

1831

1566

1832

for c in self.clients.itervalues():

1567

for c in self.clients:

1833

1568

if c.fingerprint == fpr:

1834

1569

client = c

1835

1570

break

1836

1571

else:

1837

logger.info("Client not found for fingerprint: %s, ad"

1838

"dress: %s", fpr, address)

1572

logger.warning("Client not found for fingerprint: %s, ad"

1573

"dress: %s", fpr, address)

1839

1574

if self.use_dbus:

1840

1575

# Emit D-Bus signal

1841

mandos_dbus_service.ClientNotFound(fpr,

1842

address[0])

1576

mandos_dbus_service.ClientNotFound(fpr, address[0])

1843

1577

parent_pipe.send(False)

1844

1578

return False

1845

1579

1846

1580

gobject.io_add_watch(parent_pipe.fileno(),

1847

1581

gobject.IO_IN | gobject.IO_HUP,

1848

1582

functools.partial(self.handle_ipc,

1849

parent_pipe =

1850

parent_pipe,

1851

proc = proc,

1852

client_object =

1853

client))

1583

parent_pipe = parent_pipe,

1584

client_object = client))

1854

1585

parent_pipe.send(True)

1855

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

1856

# same fileno

1586

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

1857

1587

return False

1858

1588

if command == 'funcall':

1859

1589

funcname = request[1]

1860

1590

args = request[2]

1861

1591

kwargs = request[3]

1862

1592

1863

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

1864

funcname)(*args,

1865

**kwargs)))

1866

1593

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

1594

1867

1595

if command == 'getattr':

1868

1596

attrname = request[1]

1869

1597

if callable(client_object.__getattribute__(attrname)):

1870

1598

parent_pipe.send(('function',))

1871

1599

else:

1872

parent_pipe.send(('data', client_object

1873

.__getattribute__(attrname)))

1600

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

1874

1601

1875

1602

if command == 'setattr':

1876

1603

attrname = request[1]

1877

1604

value = request[2]

1878

1605

setattr(client_object, attrname, value)

1879

1606

1880

1607

return True

1881

1608

1882

1609

1919

1646

return timevalue

1920

1647

1921

1648

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

1922

1673

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

1923

1674

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

1924

1675

1979

1730

" system bus interface")

1980

1731

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

1981

1732

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

1982

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

1983

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

1984

" state")

1985

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

1986

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

1987

1988

1733

options = parser.parse_args()

1989

1734

1990

1735

if options.check:

2003

1748

"use_dbus": "True",

2004

1749

"use_ipv6": "True",

2005

1750

"debuglevel": "",

2006

"restore": "True",

2007

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

2008

1751

}

2009

1752

2010

1753

# Parse config file for server-global settings

2027

1770

# options, if set.

2028

1771

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

2029

1772

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

2030

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

2031

"statedir"):

1773

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

2032

1774

value = getattr(options, option)

2033

1775

if value is not None:

2034

1776

server_settings[option] = value

2046

1788

debuglevel = server_settings["debuglevel"]

2047

1789

use_dbus = server_settings["use_dbus"]

2048

1790

use_ipv6 = server_settings["use_ipv6"]

2049

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

2050

stored_state_file)

2051

2052

if debug:

2053

initlogger(logging.DEBUG)

2054

else:

2055

if not debuglevel:

2056

initlogger()

2057

else:

2058

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

2059

initlogger(level)

2060

1791

2061

1792

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

2062

1793

syslogger.setFormatter(logging.Formatter

2063

1794

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

2065

1796

% server_settings["servicename"]))

2066

1797

2067

1798

# Parse config file with clients

2068

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

2069

"extended_timeout": "15m",

2070

"interval": "2m",

1799

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

1800

"interval": "5m",

2071

1801

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

2072

1802

"host": "",

2073

1803

"approval_delay": "0s",

2117

1847

if error[0] != errno.EPERM:

2118

1848

raise error

2119

1849

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

2120

1858

if debug:

2121

1859

# Enable all possible GnuTLS debugging

2122

1860

2153

1891

# End of Avahi example code

2154

1892

if use_dbus:

2155

1893

try:

2156

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

1894

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

2157

1895

bus, do_not_queue=True)

2158

old_bus_name = (dbus.service.BusName

2159

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

2160

do_not_queue=True))

2161

1896

except dbus.exceptions.NameExistsException as e:

2162

1897

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

2163

1898

use_dbus = False

2164

1899

server_settings["use_dbus"] = False

2165

1900

tcp_server.use_dbus = False

2166

1901

protocol = avahi.PROTO_INET6 if use_ipv6 else avahi.PROTO_INET

2167

service = AvahiServiceToSyslog(name =

2168

server_settings["servicename"],

2169

servicetype = "_mandos._tcp",

2170

protocol = protocol, bus = bus)

1902

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

1903

servicetype = "_mandos._tcp",

1904

protocol = protocol, bus = bus)

2171

1905

if server_settings["interface"]:

2172

1906

service.interface = (if_nametoindex

2173

1907

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

2177

1911

2178

1912

client_class = Client

2179

1913

if use_dbus:

2180

client_class = functools.partial(ClientDBusTransitional,

2181

bus = bus)

2182

2183

special_settings = {

2184

# Some settings need to be accessd by special methods;

2185

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

2186

"approved_by_default":

2187

lambda section:

2188

client_config.getboolean(section, "approved_by_default"),

2189

"enabled":

2190

lambda section:

2191

client_config.getboolean(section, "enabled"),

2192

}

2193

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

2194

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

2195

# with exceptions for any special settings as defined above

2196

client_settings = dict((clientname,

2197

dict((setting,

2198

(value

2199

if setting not in special_settings

2200

else special_settings[setting]

2201

(clientname)))

2202

for setting, value in

2203

client_config.items(clientname)))

2204

for clientname in client_config.sections())

2205

2206

old_client_settings = {}

2207

clients_data = []

2208

2209

# Get client data and settings from last running state.

2210

if server_settings["restore"]:

2211

try:

2212

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

2213

clients_data, old_client_settings = (pickle.load

2214

(stored_state))

2215

os.remove(stored_state_path)

2216

except IOError as e:

2217

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

2218

.format(e))

2219

if e.errno != errno.ENOENT:

2220

raise

2221

2222

with PGPEngine() as pgp:

2223

for client in clients_data:

2224

client_name = client["name"]

2225

2226

# Decide which value to use after restoring saved state.

2227

# We have three different values: Old config file,

2228

# new config file, and saved state.

2229

# New config value takes precedence if it differs from old

2230

# config value, otherwise use saved state.

2231

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

2232

try:

2233

# For each value in new config, check if it

2234

# differs from the old config value (Except for

2235

# the "secret" attribute)

2236

if (name != "secret" and

2237

value != old_client_settings[client_name]

2238

[name]):

2239

setattr(client, name, value)

2240

except KeyError:

2241

pass

2242

2243

# Clients who has passed its expire date can still be

2244

# enabled if its last checker was sucessful. Clients

2245

# whose checker failed before we stored its state is

2246

# assumed to have failed all checkers during downtime.

2247

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

2248

if ((datetime.datetime.utcnow()

2249

- client["last_checked_ok"])

2250

> client["interval"]):

2251

if client["last_checker_status"] != 0:

2252

client["enabled"] = False

2253

else:

2254

client["expires"] = (datetime.datetime

2255

.utcnow()

2256

+ client["timeout"])

2257

2258

client["changedstate"] = (multiprocessing_manager

2259

.Condition

2260

(multiprocessing_manager

2261

.Lock()))

2262

if use_dbus:

2263

new_client = (ClientDBusTransitional.__new__

2264

(ClientDBusTransitional))

2265

tcp_server.clients[client_name] = new_client

2266

new_client.bus = bus

2267

for name, value in client.iteritems():

2268

setattr(new_client, name, value)

2269

client_object_name = unicode(client_name).translate(

2270

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

2271

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

2272

new_client.dbus_object_path = (dbus.ObjectPath

2273

("/clients/"

2274

+ client_object_name))

2275

DBusObjectWithProperties.__init__(new_client,

2276

new_client.bus,

2277

new_client

2278

.dbus_object_path)

2279

else:

2280

tcp_server.clients[client_name] = (Client.__new__

2281

(Client))

2282

for name, value in client.iteritems():

2283

setattr(tcp_server.clients[client_name],

2284

name, value)

2285

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):

2286

1922

try:

2287

tcp_server.clients[client_name].secret = (

2288

pgp.decrypt(tcp_server.clients[client_name]

2289

.encrypted_secret,

2290

client_settings[client_name]

2291

["secret"]))

2292

except PGPError:

2293

# If decryption fails, we use secret from new settings

2294

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

2295

.format(client_name))

2296

tcp_server.clients[client_name].secret = (

2297

client_settings[client_name]["secret"])

2298

2299

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

2300

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

2301

del tcp_server.clients[clientname]

2302

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

2303

tcp_server.clients[clientname] = (client_class(name

2304

= clientname,

2305

config =

2306

client_settings

2307

[clientname]))

2308

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()))

2309

1932

if not tcp_server.clients:

2310

1933

logger.warning("No clients defined")

2311

1934

2324

1947

del pidfilename

2325

1948

2326

1949

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

2327

1950

2328

1951

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

2329

1952

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

2330

1953

2333

1956

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

2334

1957

def __init__(self):

2335

1958

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

2336

_interface = "se.recompile.Mandos"

1959

_interface = "se.bsnet.fukt.Mandos"

2337

1960

2338

1961

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

2339

1962

def ClientAdded(self, objpath):

2354

1977

def GetAllClients(self):

2355

1978

"D-Bus method"

2356

1979

return dbus.Array(c.dbus_object_path

2357

for c in

2358

tcp_server.clients.itervalues())

1980

for c in tcp_server.clients)

2359

1981

2360

1982

@dbus.service.method(_interface,

2361

1983

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

2363

1985

"D-Bus method"

2364

1986

return dbus.Dictionary(

2365

1987

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

2366

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

1988

for c in tcp_server.clients),

2367

1989

signature="oa{sv}")

2368

1990

2369

1991

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

2370

1992

def RemoveClient(self, object_path):

2371

1993

"D-Bus method"

2372

for c in tcp_server.clients.itervalues():

1994

for c in tcp_server.clients:

2373

1995

if c.dbus_object_path == object_path:

2374

del tcp_server.clients[c.name]

1996

tcp_server.clients.remove(c)

2375

1997

c.remove_from_connection()

2376

1998

# Don't signal anything except ClientRemoved

2377

1999

c.disable(quiet=True)

2382

2004

2383

2005

del _interface

2384

2006

2385

class MandosDBusServiceTransitional(MandosDBusService):

2386

__metaclass__ = AlternateDBusNamesMetaclass

2387

mandos_dbus_service = MandosDBusServiceTransitional()

2007

mandos_dbus_service = MandosDBusService()

2388

2008

2389

2009

def cleanup():

2390

2010

"Cleanup function; run on exit"

2391

2011

service.cleanup()

2392

2012

2393

multiprocessing.active_children()

2394

if not (tcp_server.clients or client_settings):

2395

return

2396

2397

# Store client before exiting. Secrets are encrypted with key

2398

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

2399

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

2400

clients = []

2401

with PGPEngine() as pgp:

2402

for client in tcp_server.clients.itervalues():

2403

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

2404

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

2405

key)

2406

client_dict = {}

2407

2408

# A list of attributes that will not be stored when

2409

# shutting down.

2410

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

2411

for name, typ in (inspect.getmembers

2412

(dbus.service.Object)):

2413

exclude.add(name)

2414

2415

client_dict["encrypted_secret"] = (client

2416

.encrypted_secret)

2417

for attr in client.client_structure:

2418

if attr not in exclude:

2419

client_dict[attr] = getattr(client, attr)

2420

2421

clients.append(client_dict)

2422

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

2423

2424

try:

2425

with os.fdopen(os.open(stored_state_path,

2426

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

2427

0600), "wb") as stored_state:

2428

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

2429

except (IOError, OSError) as e:

2430

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

2431

.format(e))

2432

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

2433

raise

2434

2435

# Delete all clients, and settings from config

2436

2013

while tcp_server.clients:

2437

name, client = tcp_server.clients.popitem()

2014

client = tcp_server.clients.pop()

2438

2015

if use_dbus:

2439

2016

client.remove_from_connection()

2017

client.disable_hook = None

2440

2018

# Don't signal anything except ClientRemoved

2441

2019

client.disable(quiet=True)

2442

2020

if use_dbus:

2443

2021

# Emit D-Bus signal

2444

mandos_dbus_service.ClientRemoved(client

2445

.dbus_object_path,

2022

mandos_dbus_service.ClientRemoved(client.dbus_object_path,

2446

2023

client.name)

2447

client_settings.clear()

2448

2024

2449

2025

atexit.register(cleanup)

2450

2026

2451

for client in tcp_server.clients.itervalues():

2027

for client in tcp_server.clients:

2452

2028

if use_dbus:

2453

2029

# Emit D-Bus signal

2454

2030

mandos_dbus_service.ClientAdded(client.dbus_object_path)

2455

# Need to initiate checking of clients

2456

if client.enabled:

2457

client.init_checker()

2031

client.enable()

2458

2032

2459

2033

tcp_server.enable()

2460

2034

tcp_server.server_activate()

2500

2074

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

2501

2075

cleanup()

2502

2076

2503

2504

2077

if __name__ == '__main__':

2505

2078

main()