/mandos/trunk : revision 518.2.3

11

# "AvahiService" class, and some lines in "main".

12

#

13

# Everything else is

14

15

14

15

16

#

17

# This program is free software: you can redistribute it and/or modify

18

# it under the terms of the GNU General Public License as published by

34

from __future__ import (division, absolute_import, print_function,

35

unicode_literals)

36

37

from future_builtins import *

38

39

37

import SocketServer as socketserver

40

38

import socket

41

39

import argparse

67

65

import types

68

66

import binascii

69

67

import tempfile

70

import itertools

71

68

72

69

import dbus

73

70

import dbus.service

88

85

except ImportError:

89

86

SO_BINDTODEVICE = None

90

87

91

version = "1.5.3"

88

89

version = "1.4.1"

92

90

stored_state_file = "clients.pickle"

93

91

94

92

logger = logging.getLogger()

113

111

return interface_index

114

112

115

113

116

def initlogger(debug, level=logging.WARNING):

114

def initlogger(level=logging.WARNING):

117

115

"""init logger and add loglevel"""

118

116

119

117

syslogger.setFormatter(logging.Formatter

121

119

' %(message)s'))

122

120

logger.addHandler(syslogger)

123

121

124

if debug:

125

console = logging.StreamHandler()

126

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

127

' [%(process)d]:'

128

' %(levelname)s:'

129

' %(message)s'))

130

logger.addHandler(console)

122

console = logging.StreamHandler()

123

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

124

' [%(process)d]:'

125

' %(levelname)s:'

126

' %(message)s'))

127

logger.addHandler(console)

131

128

logger.setLevel(level)

132

129

133

130

134

class PGPError(Exception):

135

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

131

class CryptoError(Exception):

136

132

pass

137

133

138

134

139

class PGPEngine(object):

135

class Crypto(object):

140

136

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

141

137

def __init__(self):

142

138

self.gnupg = GnuPGInterface.GnuPG()

145

141

self.gnupg.options.meta_interactive = False

146

142

self.gnupg.options.homedir = self.tempdir

147

143

self.gnupg.options.extra_args.extend(['--force-mdc',

148

'--quiet',

149

'--no-use-agent'])

144

'--quiet'])

150

145

151

146

def __enter__(self):

152

147

return self

178

173

179

174

def encrypt(self, data, password):

180

175

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

181

with open(os.devnull, "w") as devnull:

176

with open(os.devnull) as devnull:

182

177

try:

183

178

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

184

179

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

189

184

ciphertext = f.read()

190

185

proc.wait()

191

186

except IOError as e:

192

raise PGPError(e)

187

raise CryptoError(e)

193

188

self.gnupg.passphrase = None

194

189

return ciphertext

195

190

196

191

def decrypt(self, data, password):

197

192

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

198

with open(os.devnull, "w") as devnull:

193

with open(os.devnull) as devnull:

199

194

try:

200

195

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

201

196

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

202

197

attach_fhs={'stderr': devnull})

203

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

198

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

204

199

f.write(data)

205

200

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

206

201

decrypted_plaintext = f.read()

207

202

proc.wait()

208

203

except IOError as e:

209

raise PGPError(e)

204

raise CryptoError(e)

210

205

self.gnupg.passphrase = None

211

206

return decrypted_plaintext

212

207

213

208

209

214

210

class AvahiError(Exception):

215

211

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

216

212

self.value = value

245

241

server: D-Bus Server

246

242

bus: dbus.SystemBus()

247

243

"""

248

249

244

def __init__(self, interface = avahi.IF_UNSPEC, name = None,

250

245

servicetype = None, port = None, TXT = None,

251

246

domain = "", host = "", max_renames = 32768,

264

259

self.server = None

265

260

self.bus = bus

266

261

self.entry_group_state_changed_match = None

267

268

262

def rename(self):

269

263

"""Derived from the Avahi example code"""

270

264

if self.rename_count >= self.max_renames:

280

274

try:

281

275

self.add()

282

276

except dbus.exceptions.DBusException as error:

283

logger.critical("D-Bus Exception", exc_info=error)

277

logger.critical("DBusException: %s", error)

284

278

self.cleanup()

285

279

os._exit(1)

286

280

self.rename_count += 1

287

288

281

def remove(self):

289

282

"""Derived from the Avahi example code"""

290

283

if self.entry_group_state_changed_match is not None:

292

285

self.entry_group_state_changed_match = None

293

286

if self.group is not None:

294

287

self.group.Reset()

295

296

288

def add(self):

297

289

"""Derived from the Avahi example code"""

298

290

self.remove()

315

307

dbus.UInt16(self.port),

316

308

avahi.string_array_to_txt_array(self.TXT))

317

309

self.group.Commit()

318

319

310

def entry_group_state_changed(self, state, error):

320

311

"""Derived from the Avahi example code"""

321

312

logger.debug("Avahi entry group state change: %i", state)

328

319

elif state == avahi.ENTRY_GROUP_FAILURE:

329

320

logger.critical("Avahi: Error in group state changed %s",

330

321

unicode(error))

331

raise AvahiGroupError("State changed: {0!s}"

332

.format(error))

333

322

raise AvahiGroupError("State changed: %s"

323

% unicode(error))

334

324

def cleanup(self):

335

325

"""Derived from the Avahi example code"""

336

326

if self.group is not None:

341

331

pass

342

332

self.group = None

343

333

self.remove()

344

345

334

def server_state_changed(self, state, error=None):

346

335

"""Derived from the Avahi example code"""

347

336

logger.debug("Avahi server state change: %i", state)

366

355

logger.debug("Unknown state: %r", state)

367

356

else:

368

357

logger.debug("Unknown state: %r: %r", state, error)

369

370

358

def activate(self):

371

359

"""Derived from the Avahi example code"""

372

360

if self.server is None:

384

372

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

385

373

ret = AvahiService.rename(self)

386

374

syslogger.setFormatter(logging.Formatter

387

('Mandos ({0}) [%(process)d]:'

388

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

389

.format(self.name)))

375

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

376

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

377

% self.name))

390

378

return ret

391

379

392

def timedelta_to_milliseconds(td):

380

def _timedelta_to_milliseconds(td):

393

381

"Convert a datetime.timedelta() to milliseconds"

394

382

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

395

383

+ (td.seconds * 1000)

396

384

+ (td.microseconds // 1000))

397

385

398

386

class Client(object):

399

387

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

400

388

401

389

Attributes:

402

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

390

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

403

391

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

404

392

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

405

393

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

423

411

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

424

412

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

425

413

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

414

426

415

last_checker_status: integer between 0 and 255 reflecting exit

427

416

status of last checker. -1 reflects crashed

428

checker, -2 means no checker completed yet.

417

checker, or None.

429

418

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

430

419

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

431

420

D-Bus identifiers

432

421

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

433

422

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

434

423

until this client is disabled

435

extended_timeout: extra long timeout when secret has been sent

424

extended_timeout: extra long timeout when password has been sent

436

425

runtime_expansions: Allowed attributes for runtime expansion.

437

426

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

438

427

disabled, or None

442

431

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

443

432

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

444

433

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

445

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

446

"extended_timeout": "15m",

447

"interval": "2m",

448

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

449

"host": "",

450

"approval_delay": "0s",

451

"approval_duration": "1s",

452

"approved_by_default": "True",

453

"enabled": "True",

454

}

455

434

456

435

def timeout_milliseconds(self):

457

436

"Return the 'timeout' attribute in milliseconds"

458

return timedelta_to_milliseconds(self.timeout)

437

return _timedelta_to_milliseconds(self.timeout)

459

438

460

439

def extended_timeout_milliseconds(self):

461

440

"Return the 'extended_timeout' attribute in milliseconds"

462

return timedelta_to_milliseconds(self.extended_timeout)

441

return _timedelta_to_milliseconds(self.extended_timeout)

463

442

464

443

def interval_milliseconds(self):

465

444

"Return the 'interval' attribute in milliseconds"

466

return timedelta_to_milliseconds(self.interval)

445

return _timedelta_to_milliseconds(self.interval)

467

446

468

447

def approval_delay_milliseconds(self):

469

return timedelta_to_milliseconds(self.approval_delay)

470

471

@staticmethod

472

def config_parser(config):

473

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

474

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

475

with exceptions for any special settings as defined above.

476

NOTE: Must be a pure function. Must return the same result

477

value given the same arguments.

478

"""

479

settings = {}

480

for client_name in config.sections():

481

section = dict(config.items(client_name))

482

client = settings[client_name] = {}

483

484

client["host"] = section["host"]

485

# Reformat values from string types to Python types

486

client["approved_by_default"] = config.getboolean(

487

client_name, "approved_by_default")

488

client["enabled"] = config.getboolean(client_name,

489

"enabled")

490

491

client["fingerprint"] = (section["fingerprint"].upper()

492

.replace(" ", ""))

493

if "secret" in section:

494

client["secret"] = section["secret"].decode("base64")

495

elif "secfile" in section:

496

with open(os.path.expanduser(os.path.expandvars

497

(section["secfile"])),

498

"rb") as secfile:

499

client["secret"] = secfile.read()

500

else:

501

raise TypeError("No secret or secfile for section {0}"

502

.format(section))

503

client["timeout"] = string_to_delta(section["timeout"])

504

client["extended_timeout"] = string_to_delta(

505

section["extended_timeout"])

506

client["interval"] = string_to_delta(section["interval"])

507

client["approval_delay"] = string_to_delta(

508

section["approval_delay"])

509

client["approval_duration"] = string_to_delta(

510

section["approval_duration"])

511

client["checker_command"] = section["checker"]

512

client["last_approval_request"] = None

513

client["last_checked_ok"] = None

514

client["last_checker_status"] = -2

515

516

return settings

517

518

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

448

return _timedelta_to_milliseconds(self.approval_delay)

449

450

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

451

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

452

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

453

attribute."""

519

454

self.name = name

520

# adding all client settings

521

for setting, value in settings.iteritems():

522

setattr(self, setting, value)

523

524

if self.enabled:

525

if not hasattr(self, "last_enabled"):

526

self.last_enabled = datetime.datetime.utcnow()

527

if not hasattr(self, "expires"):

528

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

529

+ self.timeout)

530

else:

531

self.last_enabled = None

532

self.expires = None

533

455

if config is None:

456

config = {}

534

457

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

535

458

# Uppercase and remove spaces from fingerprint for later

536

459

# comparison purposes with return value from the fingerprint()

537

460

# function

461

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

462

.replace(" ", ""))

538

463

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

539

self.created = settings.get("created",

540

datetime.datetime.utcnow())

541

542

# attributes specific for this server instance

464

if "secret" in config:

465

self.secret = config["secret"].decode("base64")

466

elif "secfile" in config:

467

with open(os.path.expanduser(os.path.expandvars

468

(config["secfile"])),

469

"rb") as secfile:

470

self.secret = secfile.read()

471

else:

472

raise TypeError("No secret or secfile for client %s"

473

% self.name)

474

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

475

self.created = datetime.datetime.utcnow()

476

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

477

self.last_approval_request = None

478

if self.enabled:

479

self.last_enabled = datetime.datetime.utcnow()

480

else:

481

self.last_enabled = None

482

self.last_checked_ok = None

483

self.last_checker_status = None

484

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

485

self.extended_timeout = string_to_delta(config

486

["extended_timeout"])

487

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

543

488

self.checker = None

544

489

self.checker_initiator_tag = None

545

490

self.disable_initiator_tag = None

491

if self.enabled:

492

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

493

else:

494

self.expires = None

546

495

self.checker_callback_tag = None

496

self.checker_command = config["checker"]

547

497

self.current_checker_command = None

548

self.approved = None

498

self._approved = None

499

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

500

True)

549

501

self.approvals_pending = 0

502

self.approval_delay = string_to_delta(

503

config["approval_delay"])

504

self.approval_duration = string_to_delta(

505

config["approval_duration"])

550

506

self.changedstate = (multiprocessing_manager

551

507

.Condition(multiprocessing_manager

552

508

.Lock()))

572

528

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

573

529

# Already enabled

574

530

return

531

self.send_changedstate()

575

532

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

576

533

self.enabled = True

577

534

self.last_enabled = datetime.datetime.utcnow()

578

535

self.init_checker()

579

self.send_changedstate()

580

536

581

537

def disable(self, quiet=True):

582

538

"""Disable this client."""

583

539

if not getattr(self, "enabled", False):

584

540

return False

585

541

if not quiet:

542

self.send_changedstate()

543

if not quiet:

586

544

logger.info("Disabling client %s", self.name)

587

if getattr(self, "disable_initiator_tag", None) is not None:

545

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

588

546

gobject.source_remove(self.disable_initiator_tag)

589

547

self.disable_initiator_tag = None

590

548

self.expires = None

591

if getattr(self, "checker_initiator_tag", None) is not None:

549

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

592

550

gobject.source_remove(self.checker_initiator_tag)

593

551

self.checker_initiator_tag = None

594

552

self.stop_checker()

595

553

self.enabled = False

596

if not quiet:

597

self.send_changedstate()

598

554

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

599

555

return False

600

556

604

560

def init_checker(self):

605

561

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

606

562

# and every interval from then on.

607

if self.checker_initiator_tag is not None:

608

gobject.source_remove(self.checker_initiator_tag)

609

563

self.checker_initiator_tag = (gobject.timeout_add

610

564

(self.interval_milliseconds(),

611

565

self.start_checker))

612

566

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

613

if self.disable_initiator_tag is not None:

614

gobject.source_remove(self.disable_initiator_tag)

615

567

self.disable_initiator_tag = (gobject.timeout_add

616

568

(self.timeout_milliseconds(),

617

569

self.disable))

623

575

self.checker_callback_tag = None

624

576

self.checker = None

625

577

if os.WIFEXITED(condition):

626

self.last_checker_status = os.WEXITSTATUS(condition)

578

self.last_checker_status = os.WEXITSTATUS(condition)

627

579

if self.last_checker_status == 0:

628

580

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

629

581

vars(self))

636

588

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

637

589

vars(self))

638

590

639

def checked_ok(self):

640

"""Assert that the client has been seen, alive and well."""

641

self.last_checked_ok = datetime.datetime.utcnow()

642

self.last_checker_status = 0

643

self.bump_timeout()

644

645

def bump_timeout(self, timeout=None):

646

"""Bump up the timeout for this client."""

591

def checked_ok(self, timeout=None):

592

"""Bump up the timeout for this client.

593

594

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

595

alive and well.

596

"""

647

597

if timeout is None:

648

598

timeout = self.timeout

599

self.last_checked_ok = datetime.datetime.utcnow()

649

600

if self.disable_initiator_tag is not None:

650

601

gobject.source_remove(self.disable_initiator_tag)

651

self.disable_initiator_tag = None

652

602

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

653

603

self.disable_initiator_tag = (gobject.timeout_add

654

(timedelta_to_milliseconds

604

(_timedelta_to_milliseconds

655

605

(timeout), self.disable))

656

606

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

657

607

664

614

If a checker already exists, leave it running and do

665

615

nothing."""

666

616

# The reason for not killing a running checker is that if we

667

# did that, and if a checker (for some reason) started running

668

# slowly and taking more than 'interval' time, then the client

669

# would inevitably timeout, since no checker would get a

670

# chance to run to completion. If we instead leave running

617

# did that, then if a checker (for some reason) started

618

# running slowly and taking more than 'interval' time, the

619

# client would inevitably timeout, since no checker would get

620

# a chance to run to completion. If we instead leave running

671

621

# checkers alone, the checker would have to take more time

672

622

# than 'timeout' for the client to be disabled, which is as it

673

623

# should be.

703

653

try:

704

654

command = self.checker_command % escaped_attrs

705

655

except TypeError as error:

706

logger.error('Could not format string "%s"',

707

self.checker_command, exc_info=error)

656

logger.error('Could not format string "%s":'

657

' %s', self.checker_command, error)

708

658

return True # Try again later

709

659

self.current_checker_command = command

710

660

try:

728

678

gobject.source_remove(self.checker_callback_tag)

729

679

self.checker_callback(pid, status, command)

730

680

except OSError as error:

731

logger.error("Failed to start subprocess",

732

exc_info=error)

681

logger.error("Failed to start subprocess: %s",

682

error)

733

683

# Re-run this periodically if run by gobject.timeout_add

734

684

return True

735

685

742

692

return

743

693

logger.debug("Stopping checker for %(name)s", vars(self))

744

694

try:

745

self.checker.terminate()

695

os.kill(self.checker.pid, signal.SIGTERM)

746

696

#time.sleep(0.5)

747

697

#if self.checker.poll() is None:

748

# self.checker.kill()

698

# os.kill(self.checker.pid, signal.SIGKILL)

749

699

except OSError as error:

750

700

if error.errno != errno.ESRCH: # No such process

751

701

raise

768

718

# "Set" method, so we fail early here:

769

719

if byte_arrays and signature != "ay":

770

720

raise ValueError("Byte arrays not supported for non-'ay'"

771

" signature {0!r}".format(signature))

721

" signature %r" % signature)

772

722

def decorator(func):

773

723

func._dbus_is_property = True

774

724

func._dbus_interface = dbus_interface

782

732

return decorator

783

733

784

734

785

def dbus_interface_annotations(dbus_interface):

786

"""Decorator for marking functions returning interface annotations

787

788

Usage:

789

790

@dbus_interface_annotations("org.example.Interface")

791

def _foo(self): # Function name does not matter

792

return {"org.freedesktop.DBus.Deprecated": "true",

793

"org.freedesktop.DBus.Property.EmitsChangedSignal":

794

"false"}

795

"""

796

def decorator(func):

797

func._dbus_is_interface = True

798

func._dbus_interface = dbus_interface

799

func._dbus_name = dbus_interface

800

return func

801

return decorator

802

803

804

def dbus_annotations(annotations):

805

"""Decorator to annotate D-Bus methods, signals or properties

806

Usage:

807

808

@dbus_service_property("org.example.Interface", signature="b",

809

access="r")

810

@dbus_annotations({{"org.freedesktop.DBus.Deprecated": "true",

811

"org.freedesktop.DBus.Property."

812

"EmitsChangedSignal": "false"})

813

def Property_dbus_property(self):

814

return dbus.Boolean(False)

815

"""

816

def decorator(func):

817

func._dbus_annotations = annotations

818

return func

819

return decorator

820

821

822

735

class DBusPropertyException(dbus.exceptions.DBusException):

823

736

"""A base class for D-Bus property-related exceptions

824

737

"""

847

760

"""

848

761

849

762

@staticmethod

850

def _is_dbus_thing(thing):

851

"""Returns a function testing if an attribute is a D-Bus thing

852

853

If called like _is_dbus_thing("method") it returns a function

854

suitable for use as predicate to inspect.getmembers().

855

"""

856

return lambda obj: getattr(obj, "_dbus_is_{0}".format(thing),

857

False)

763

def _is_dbus_property(obj):

764

return getattr(obj, "_dbus_is_property", False)

858

765

859

def _get_all_dbus_things(self, thing):

766

def _get_all_dbus_properties(self):

860

767

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

861

768

"""

862

return ((getattr(athing.__get__(self), "_dbus_name",

863

name),

864

athing.__get__(self))

769

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

865

770

for cls in self.__class__.__mro__

866

for name, athing in

867

inspect.getmembers(cls,

868

self._is_dbus_thing(thing)))

771

for name, prop in

772

inspect.getmembers(cls, self._is_dbus_property))

869

773

870

774

def _get_dbus_property(self, interface_name, property_name):

871

775

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

873

777

"""

874

778

for cls in self.__class__.__mro__:

875

779

for name, value in (inspect.getmembers

876

(cls,

877

self._is_dbus_thing("property"))):

780

(cls, self._is_dbus_property)):

878

781

if (value._dbus_name == property_name

879

782

and value._dbus_interface == interface_name):

880

783

return value.__get__(self)

909

812

# signatures other than "ay".

910

813

if prop._dbus_signature != "ay":

911

814

raise ValueError

912

value = dbus.ByteArray(b''.join(chr(byte)

913

for byte in value))

815

value = dbus.ByteArray(''.join(unichr(byte)

816

for byte in value))

914

817

prop(value)

915

818

916

819

@dbus.service.method(dbus.PROPERTIES_IFACE, in_signature="s",

922

825

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

923

826

"""

924

827

properties = {}

925

for name, prop in self._get_all_dbus_things("property"):

828

for name, prop in self._get_all_dbus_properties():

926

829

if (interface_name

927

830

and interface_name != prop._dbus_interface):

928

831

# Interface non-empty but did not match

943

846

path_keyword='object_path',

944

847

connection_keyword='connection')

945

848

def Introspect(self, object_path, connection):

946

"""Overloading of standard D-Bus method.

947

948

Inserts property tags and interface annotation tags.

849

"""Standard D-Bus method, overloaded to insert property tags.

949

850

"""

950

851

xmlstring = dbus.service.Object.Introspect(self, object_path,

951

852

connection)

958

859

e.setAttribute("access", prop._dbus_access)

959

860

return e

960

861

for if_tag in document.getElementsByTagName("interface"):

961

# Add property tags

962

862

for tag in (make_tag(document, name, prop)

963

863

for name, prop

964

in self._get_all_dbus_things("property")

864

in self._get_all_dbus_properties()

965

865

if prop._dbus_interface

966

866

== if_tag.getAttribute("name")):

967

867

if_tag.appendChild(tag)

968

# Add annotation tags

969

for typ in ("method", "signal", "property"):

970

for tag in if_tag.getElementsByTagName(typ):

971

annots = dict()

972

for name, prop in (self.

973

_get_all_dbus_things(typ)):

974

if (name == tag.getAttribute("name")

975

and prop._dbus_interface

976

== if_tag.getAttribute("name")):

977

annots.update(getattr

978

(prop,

979

"_dbus_annotations",

980

{}))

981

for name, value in annots.iteritems():

982

ann_tag = document.createElement(

983

"annotation")

984

ann_tag.setAttribute("name", name)

985

ann_tag.setAttribute("value", value)

986

tag.appendChild(ann_tag)

987

# Add interface annotation tags

988

for annotation, value in dict(

989

itertools.chain.from_iterable(

990

annotations().iteritems()

991

for name, annotations in

992

self._get_all_dbus_things("interface")

993

if name == if_tag.getAttribute("name")

994

)).iteritems():

995

ann_tag = document.createElement("annotation")

996

ann_tag.setAttribute("name", annotation)

997

ann_tag.setAttribute("value", value)

998

if_tag.appendChild(ann_tag)

999

868

# Add the names to the return values for the

1000

869

# "org.freedesktop.DBus.Properties" methods

1001

870

if (if_tag.getAttribute("name")

1016

885

except (AttributeError, xml.dom.DOMException,

1017

886

xml.parsers.expat.ExpatError) as error:

1018

887

logger.error("Failed to override Introspection method",

1019

exc_info=error)

888

error)

1020

889

return xmlstring

1021

890

1022

891

1028

897

variant_level=variant_level)

1029

898

1030

899

1031

def alternate_dbus_interfaces(alt_interface_names, deprecate=True):

1032

"""A class decorator; applied to a subclass of

1033

dbus.service.Object, it will add alternate D-Bus attributes with

1034

interface names according to the "alt_interface_names" mapping.

1035

Usage:

1036

1037

@alternate_dbus_names({"org.example.Interface":

1038

"net.example.AlternateInterface"})

1039

class SampleDBusObject(dbus.service.Object):

1040

@dbus.service.method("org.example.Interface")

1041

def SampleDBusMethod():

1042

pass

1043

1044

The above "SampleDBusMethod" on "SampleDBusObject" will be

1045

reachable via two interfaces: "org.example.Interface" and

1046

"net.example.AlternateInterface", the latter of which will have

1047

its D-Bus annotation "org.freedesktop.DBus.Deprecated" set to

1048

"true", unless "deprecate" is passed with a False value.

1049

1050

This works for methods and signals, and also for D-Bus properties

1051

(from DBusObjectWithProperties) and interfaces (from the

1052

dbus_interface_annotations decorator).

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.

1053

904

"""

1054

def wrapper(cls):

1055

for orig_interface_name, alt_interface_name in (

1056

alt_interface_names.iteritems()):

1057

attr = {}

1058

interface_names = set()

1059

# Go though all attributes of the class

1060

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

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):

1061

912

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

1062

913

# with the wrong interface name

1063

914

if (not hasattr(attribute, "_dbus_interface")

1064

915

or not attribute._dbus_interface

1065

.startswith(orig_interface_name)):

916

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

1066

917

continue

1067

918

# Create an alternate D-Bus interface name based on

1068

919

# the current name

1069

920

alt_interface = (attribute._dbus_interface

1070

.replace(orig_interface_name,

1071

alt_interface_name))

1072

interface_names.add(alt_interface)

921

.replace("se.recompile.Mandos",

922

"se.bsnet.fukt.Mandos"))

1073

923

# Is this a D-Bus signal?

1074

924

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

1075

925

# Extract the original non-method function by

1090

940

nonmethod_func.func_name,

1091

941

nonmethod_func.func_defaults,

1092

942

nonmethod_func.func_closure)))

1093

# Copy annotations, if any

1094

try:

1095

new_function._dbus_annotations = (

1096

dict(attribute._dbus_annotations))

1097

except AttributeError:

1098

pass

1099

943

# Define a creator of a function to call both the

1100

# original and alternate functions, so both the

1101

# original and alternate signals gets sent when

1102

# the function is called

944

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

945

# signals gets sent when the function is called

1103

946

def fixscope(func1, func2):

1104

947

"""This function is a scope container to pass

1105

948

func1 and func2 to the "call_both" function

1112

955

return call_both

1113

956

# Create the "call_both" function and add it to

1114

957

# the class

1115

attr[attrname] = fixscope(attribute, new_function)

958

attr[attrname] = fixscope(attribute,

959

new_function)

1116

960

# Is this a D-Bus method?

1117

961

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

1118

962

# Create a new, but exactly alike, function

1129

973

attribute.func_name,

1130

974

attribute.func_defaults,

1131

975

attribute.func_closure)))

1132

# Copy annotations, if any

1133

try:

1134

attr[attrname]._dbus_annotations = (

1135

dict(attribute._dbus_annotations))

1136

except AttributeError:

1137

pass

1138

976

# Is this a D-Bus property?

1139

977

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

1140

978

# Create a new, but exactly alike, function

1154

992

attribute.func_name,

1155

993

attribute.func_defaults,

1156

994

attribute.func_closure)))

1157

# Copy annotations, if any

1158

try:

1159

attr[attrname]._dbus_annotations = (

1160

dict(attribute._dbus_annotations))

1161

except AttributeError:

1162

pass

1163

# Is this a D-Bus interface?

1164

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

1165

# Create a new, but exactly alike, function

1166

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

1167

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

1168

# to the class.

1169

attr[attrname] = (dbus_interface_annotations

1170

(alt_interface)

1171

(types.FunctionType

1172

(attribute.func_code,

1173

attribute.func_globals,

1174

attribute.func_name,

1175

attribute.func_defaults,

1176

attribute.func_closure)))

1177

if deprecate:

1178

# Deprecate all alternate interfaces

1179

iname="_AlternateDBusNames_interface_annotation{0}"

1180

for interface_name in interface_names:

1181

@dbus_interface_annotations(interface_name)

1182

def func(self):

1183

return { "org.freedesktop.DBus.Deprecated":

1184

"true" }

1185

# Find an unused name

1186

for aname in (iname.format(i)

1187

for i in itertools.count()):

1188

if aname not in attr:

1189

attr[aname] = func

1190

break

1191

if interface_names:

1192

# Replace the class with a new subclass of it with

1193

# methods, signals, etc. as created above.

1194

cls = type(b"{0}Alternate".format(cls.__name__),

1195

(cls,), attr)

1196

return cls

1197

return wrapper

1198

1199

1200

@alternate_dbus_interfaces({"se.recompile.Mandos":

1201

"se.bsnet.fukt.Mandos"})

995

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

996

997

1202

998

class ClientDBus(Client, DBusObjectWithProperties):

1203

999

"""A Client class using D-Bus

1204

1000

1215

1011

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

1216

1012

self.bus = bus

1217

1013

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

1014

1015

self._approvals_pending = 0

1218

1016

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

1219

1017

# the D-Bus

1220

1018

client_object_name = unicode(self.name).translate(

1224

1022

("/clients/" + client_object_name))

1225

1023

DBusObjectWithProperties.__init__(self, self.bus,

1226

1024

self.dbus_object_path)

1227

1025

1228

1026

def notifychangeproperty(transform_func,

1229

1027

dbus_name, type_func=lambda x: x,

1230

1028

variant_level=1):

1253

1051

1254

1052

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

1255

1053

1054

1256

1055

expires = notifychangeproperty(datetime_to_dbus, "Expires")

1257

1056

approvals_pending = notifychangeproperty(dbus.Boolean,

1258

1057

"ApprovalPending",

1265

1064

checker is not None)

1266

1065

last_checked_ok = notifychangeproperty(datetime_to_dbus,

1267

1066

"LastCheckedOK")

1268

last_checker_status = notifychangeproperty(dbus.Int16,

1269

"LastCheckerStatus")

1270

1067

last_approval_request = notifychangeproperty(

1271

1068

datetime_to_dbus, "LastApprovalRequest")

1272

1069

approved_by_default = notifychangeproperty(dbus.Boolean,

1273

1070

"ApprovedByDefault")

1274

approval_delay = notifychangeproperty(dbus.UInt64,

1071

approval_delay = notifychangeproperty(dbus.UInt16,

1275

1072

"ApprovalDelay",

1276

1073

type_func =

1277

timedelta_to_milliseconds)

1074

_timedelta_to_milliseconds)

1278

1075

approval_duration = notifychangeproperty(

1279

dbus.UInt64, "ApprovalDuration",

1280

type_func = timedelta_to_milliseconds)

1076

dbus.UInt16, "ApprovalDuration",

1077

type_func = _timedelta_to_milliseconds)

1281

1078

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

1282

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

1079

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

1283

1080

type_func =

1284

timedelta_to_milliseconds)

1081

_timedelta_to_milliseconds)

1285

1082

extended_timeout = notifychangeproperty(

1286

dbus.UInt64, "ExtendedTimeout",

1287

type_func = timedelta_to_milliseconds)

1288

interval = notifychangeproperty(dbus.UInt64,

1083

dbus.UInt16, "ExtendedTimeout",

1084

type_func = _timedelta_to_milliseconds)

1085

interval = notifychangeproperty(dbus.UInt16,

1289

1086

"Interval",

1290

1087

type_func =

1291

timedelta_to_milliseconds)

1088

_timedelta_to_milliseconds)

1292

1089

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

1293

1090

1294

1091

del notifychangeproperty

1336

1133

return r

1337

1134

1338

1135

def _reset_approved(self):

1339

self.approved = None

1136

self._approved = None

1340

1137

return False

1341

1138

1342

1139

def approve(self, value=True):

1343

self.approved = value

1344

gobject.timeout_add(timedelta_to_milliseconds

1140

self.send_changedstate()

1141

self._approved = value

1142

gobject.timeout_add(_timedelta_to_milliseconds

1345

1143

(self.approval_duration),

1346

1144

self._reset_approved)

1347

self.send_changedstate()

1145

1348

1146

1349

1147

## D-Bus methods, signals & properties

1350

1148

_interface = "se.recompile.Mandos.Client"

1351

1149

1352

## Interfaces

1353

1354

@dbus_interface_annotations(_interface)

1355

def _foo(self):

1356

return { "org.freedesktop.DBus.Property.EmitsChangedSignal":

1357

"false"}

1358

1359

1150

## Signals

1360

1151

1361

1152

# CheckerCompleted - signal

1397

1188

"D-Bus signal"

1398

1189

return self.need_approval()

1399

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

1400

1199

## Methods

1401

1200

1402

1201

# Approve - method

1460

1259

access="readwrite")

1461

1260

def ApprovalDuration_dbus_property(self, value=None):

1462

1261

if value is None: # get

1463

return dbus.UInt64(timedelta_to_milliseconds(

1262

return dbus.UInt64(_timedelta_to_milliseconds(

1464

1263

self.approval_duration))

1465

1264

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

1466

1265

1480

1279

def Host_dbus_property(self, value=None):

1481

1280

if value is None: # get

1482

1281

return dbus.String(self.host)

1483

self.host = unicode(value)

1282

self.host = value

1484

1283

1485

1284

# Created - property

1486

1285

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

1512

1311

return

1513

1312

return datetime_to_dbus(self.last_checked_ok)

1514

1313

1515

# LastCheckerStatus - property

1516

@dbus_service_property(_interface, signature="n",

1517

access="read")

1518

def LastCheckerStatus_dbus_property(self):

1519

return dbus.Int16(self.last_checker_status)

1520

1521

1314

# Expires - property

1522

1315

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

1523

1316

def Expires_dbus_property(self):

1534

1327

def Timeout_dbus_property(self, value=None):

1535

1328

if value is None: # get

1536

1329

return dbus.UInt64(self.timeout_milliseconds())

1537

old_timeout = self.timeout

1538

1330

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

1539

# Reschedule disabling

1540

if self.enabled:

1541

now = datetime.datetime.utcnow()

1542

self.expires += self.timeout - old_timeout

1543

if self.expires <= now:

1544

# The timeout has passed

1545

self.disable()

1546

else:

1547

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

1548

is None):

1549

return

1550

gobject.source_remove(self.disable_initiator_tag)

1551

self.disable_initiator_tag = (

1552

gobject.timeout_add(

1553

timedelta_to_milliseconds(self.expires - now),

1554

self.disable))

1331

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

1332

return

1333

# Reschedule timeout

1334

gobject.source_remove(self.disable_initiator_tag)

1335

self.disable_initiator_tag = None

1336

self.expires = None

1337

time_to_die = _timedelta_to_milliseconds((self

1338

.last_checked_ok

1339

+ self.timeout)

1340

- datetime.datetime

1341

.utcnow())

1342

if time_to_die <= 0:

1343

# The timeout has passed

1344

self.disable()

1345

else:

1346

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

1347

+ datetime.timedelta(milliseconds =

1348

time_to_die))

1349

self.disable_initiator_tag = (gobject.timeout_add

1350

(time_to_die, self.disable))

1555

1351

1556

1352

# ExtendedTimeout - property

1557

1353

@dbus_service_property(_interface, signature="t",

1583

1379

def Checker_dbus_property(self, value=None):

1584

1380

if value is None: # get

1585

1381

return dbus.String(self.checker_command)

1586

self.checker_command = unicode(value)

1382

self.checker_command = value

1587

1383

1588

1384

# CheckerRunning - property

1589

1385

@dbus_service_property(_interface, signature="b",

1618

1414

raise KeyError()

1619

1415

1620

1416

def __getattribute__(self, name):

1621

if name == '_pipe':

1417

if(name == '_pipe'):

1622

1418

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

1623

1419

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

1624

1420

data = self._pipe.recv()

1631

1427

return func

1632

1428

1633

1429

def __setattr__(self, name, value):

1634

if name == '_pipe':

1430

if(name == '_pipe'):

1635

1431

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

1636

1432

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

1637

1433

1638

1434

1435

class ClientDBusTransitional(ClientDBus):

1436

__metaclass__ = AlternateDBusNamesMetaclass

1437

1438

1639

1439

class ClientHandler(socketserver.BaseRequestHandler, object):

1640

1440

"""A class to handle client connections.

1641

1441

1702

1502

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

1703

1503

return

1704

1504

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

1505

if self.server.use_dbus:

1506

# Emit D-Bus signal

1507

client.NewRequest(str(self.client_address))

1705

1508

1706

1509

try:

1707

1510

client = ProxyClient(child_pipe, fpr,

1723

1526

client.Rejected("Disabled")

1724

1527

return

1725

1528

1726

if client.approved or not client.approval_delay:

1529

if client._approved or not client.approval_delay:

1727

1530

#We are approved or approval is disabled

1728

1531

break

1729

elif client.approved is None:

1532

elif client._approved is None:

1730

1533

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

1731

1534

client.name)

1732

1535

if self.server.use_dbus:

1745

1548

#wait until timeout or approved

1746

1549

time = datetime.datetime.now()

1747

1550

client.changedstate.acquire()

1748

client.changedstate.wait(

1749

float(timedelta_to_milliseconds(delay)

1750

/ 1000))

1551

(client.changedstate.wait

1552

(float(client._timedelta_to_milliseconds(delay)

1553

/ 1000)))

1751

1554

client.changedstate.release()

1752

1555

time2 = datetime.datetime.now()

1753

1556

if (time2 - time) >= delay:

1769

1572

try:

1770

1573

sent = session.send(client.secret[sent_size:])

1771

1574

except gnutls.errors.GNUTLSError as error:

1772

logger.warning("gnutls send failed",

1773

exc_info=error)

1575

logger.warning("gnutls send failed")

1774

1576

return

1775

1577

logger.debug("Sent: %d, remaining: %d",

1776

1578

sent, len(client.secret)

1779

1581

1780

1582

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

1781

1583

# bump the timeout using extended_timeout

1782

client.bump_timeout(client.extended_timeout)

1584

client.checked_ok(client.extended_timeout)

1783

1585

if self.server.use_dbus:

1784

1586

# Emit D-Bus signal

1785

1587

client.GotSecret()

1790

1592

try:

1791

1593

session.bye()

1792

1594

except gnutls.errors.GNUTLSError as error:

1793

logger.warning("GnuTLS bye failed",

1794

exc_info=error)

1595

logger.warning("GnuTLS bye failed")

1795

1596

1796

1597

@staticmethod

1797

1598

def peer_certificate(session):

1862

1663

def sub_process_main(self, request, address):

1863

1664

try:

1864

1665

self.finish_request(request, address)

1865

except Exception:

1666

except:

1866

1667

self.handle_error(request, address)

1867

1668

self.close_request(request)

1868

1669

1869

1670

def process_request(self, request, address):

1870

1671

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

1871

1672

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

1872

args = (request, address))

1673

args = (request,

1674

address))

1873

1675

proc.start()

1874

1676

return proc

1875

1677

1997

1799

1998

1800

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

1999

1801

proc = None, client_object=None):

1802

condition_names = {

1803

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

1804

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

1805

# blocking).

1806

gobject.IO_PRI: "PRI", # There is urgent data to read.

1807

gobject.IO_ERR: "ERR", # Error condition.

1808

gobject.IO_HUP: "HUP" # Hung up (the connection has been

1809

# broken, usually for pipes and

1810

# sockets).

1811

}

1812

conditions_string = ' | '.join(name

1813

for cond, name in

1814

condition_names.iteritems()

1815

if cond & condition)

2000

1816

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

2001

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

1817

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

2002

1818

# Wait for other process to exit

2003

1819

proc.join()

2004

1820

return False

2094

1910

elif suffix == "w":

2095

1911

delta = datetime.timedelta(0, 0, 0, 0, 0, 0, value)

2096

1912

else:

2097

raise ValueError("Unknown suffix {0!r}"

2098

.format(suffix))

1913

raise ValueError("Unknown suffix %r" % suffix)

2099

1914

except (ValueError, IndexError) as e:

2100

1915

raise ValueError(*(e.args))

2101

1916

timevalue += delta

2115

1930

sys.exit()

2116

1931

if not noclose:

2117

1932

# Close all standard open file descriptors

2118

null = os.open(os.devnull, os.O_NOCTTY | os.O_RDWR)

1933

null = os.open(os.path.devnull, os.O_NOCTTY | os.O_RDWR)

2119

1934

if not stat.S_ISCHR(os.fstat(null).st_mode):

2120

1935

raise OSError(errno.ENODEV,

2121

"{0} not a character device"

2122

.format(os.devnull))

1936

"%s not a character device"

1937

% os.path.devnull)

2123

1938

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

2124

1939

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

2125

1940

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

2134

1949

2135

1950

parser = argparse.ArgumentParser()

2136

1951

parser.add_argument("-v", "--version", action="version",

2137

version = "%(prog)s {0}".format(version),

1952

version = "%%(prog)s %s" % version,

2138

1953

help="show version number and exit")

2139

1954

parser.add_argument("-i", "--interface", metavar="IF",

2140

1955

help="Bind to interface IF")

2233

2048

stored_state_file)

2234

2049

2235

2050

if debug:

2236

initlogger(debug, logging.DEBUG)

2051

initlogger(logging.DEBUG)

2237

2052

else:

2238

2053

if not debuglevel:

2239

initlogger(debug)

2054

initlogger()

2240

2055

else:

2241

2056

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

2242

initlogger(debug, level)

2057

initlogger(level)

2243

2058

2244

2059

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

2245

2060

syslogger.setFormatter(logging.Formatter

2246

('Mandos ({0}) [%(process)d]:'

2247

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

2248

.format(server_settings

2249

["servicename"])))

2061

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

2062

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

2063

% server_settings["servicename"]))

2250

2064

2251

2065

# Parse config file with clients

2252

client_config = configparser.SafeConfigParser(Client

2253

.client_defaults)

2066

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

2067

"extended_timeout": "15m",

2068

"interval": "2m",

2069

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

2070

"host": "",

2071

"approval_delay": "0s",

2072

"approval_duration": "1s",

2073

}

2074

client_config = configparser.SafeConfigParser(client_defaults)

2254

2075

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

2255

2076

"clients.conf"))

2256

2077

2270

2091

pidfilename = "/var/run/mandos.pid"

2271

2092

try:

2272

2093

pidfile = open(pidfilename, "w")

2273

except IOError as e:

2274

logger.error("Could not open file %r", pidfilename,

2275

exc_info=e)

2094

except IOError:

2095

logger.error("Could not open file %r", pidfilename)

2276

2096

2277

for name in ("_mandos", "mandos", "nobody"):

2097

try:

2098

uid = pwd.getpwnam("_mandos").pw_uid

2099

gid = pwd.getpwnam("_mandos").pw_gid

2100

except KeyError:

2278

2101

try:

2279

uid = pwd.getpwnam(name).pw_uid

2280

gid = pwd.getpwnam(name).pw_gid

2281

break

2102

uid = pwd.getpwnam("mandos").pw_uid

2103

gid = pwd.getpwnam("mandos").pw_gid

2282

2104

except KeyError:

2283

continue

2284

else:

2285

uid = 65534

2286

gid = 65534

2105

try:

2106

uid = pwd.getpwnam("nobody").pw_uid

2107

gid = pwd.getpwnam("nobody").pw_gid

2108

except KeyError:

2109

uid = 65534

2110

gid = 65534

2287

2111

try:

2288

2112

os.setgid(gid)

2289

2113

os.setuid(uid)

2306

2130

.gnutls_global_set_log_function(debug_gnutls))

2307

2131

2308

2132

# Redirect stdin so all checkers get /dev/null

2309

null = os.open(os.devnull, os.O_NOCTTY | os.O_RDWR)

2133

null = os.open(os.path.devnull, os.O_NOCTTY | os.O_RDWR)

2310

2134

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

2311

2135

if null > 2:

2312

2136

os.close(null)

2137

else:

2138

# No console logging

2139

logger.removeHandler(console)

2313

2140

2314

2141

# Need to fork before connecting to D-Bus

2315

2142

if not debug:

2316

2143

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

2317

2144

daemon()

2318

2145

2319

gobject.threads_init()

2320

2321

2146

global main_loop

2322

2147

# From the Avahi example code

2323

DBusGMainLoop(set_as_default=True)

2148

DBusGMainLoop(set_as_default=True )

2324

2149

main_loop = gobject.MainLoop()

2325

2150

bus = dbus.SystemBus()

2326

2151

# End of Avahi example code

2332

2157

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

2333

2158

do_not_queue=True))

2334

2159

except dbus.exceptions.NameExistsException as e:

2335

logger.error("Disabling D-Bus:", exc_info=e)

2160

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

2336

2161

use_dbus = False

2337

2162

server_settings["use_dbus"] = False

2338

2163

tcp_server.use_dbus = False

2350

2175

2351

2176

client_class = Client

2352

2177

if use_dbus:

2353

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

2354

2355

client_settings = Client.config_parser(client_config)

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

2356

2204

old_client_settings = {}

2357

clients_data = {}

2205

clients_data = []

2358

2206

2359

2207

# Get client data and settings from last running state.

2360

2208

if server_settings["restore"]:

2364

2212

(stored_state))

2365

2213

os.remove(stored_state_path)

2366

2214

except IOError as e:

2367

if e.errno == errno.ENOENT:

2368

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

2369

.format(os.strerror(e.errno)))

2370

else:

2371

logger.critical("Could not load persistent state:",

2372

exc_info=e)

2215

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

2216

.format(e))

2217

if e.errno != errno.ENOENT:

2373

2218

raise

2374

except EOFError as e:

2375

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

2376

"EOFError:", exc_info=e)

2377

2219

2378

with PGPEngine() as pgp:

2379

for client_name, client in clients_data.iteritems():

2220

with Crypto() as crypt:

2221

for client in clients_data:

2222

client_name = client["name"]

2223

2380

2224

# Decide which value to use after restoring saved state.

2381

2225

# We have three different values: Old config file,

2382

2226

# new config file, and saved state.

2390

2234

if (name != "secret" and

2391

2235

value != old_client_settings[client_name]

2392

2236

[name]):

2393

client[name] = value

2237

setattr(client, name, value)

2394

2238

except KeyError:

2395

2239

pass

2396

2240

2397

2241

# Clients who has passed its expire date can still be

2398

# enabled if its last checker was successful. Clients

2399

# whose checker succeeded before we stored its state is

2400

# assumed to have successfully run all checkers during

2401

# downtime.

2402

if client["enabled"]:

2403

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

2404

if not client["last_checked_ok"]:

2405

logger.warning(

2406

"disabling client {0} - Client never "

2407

"performed a successful checker"

2408

.format(client_name))

2409

client["enabled"] = False

2410

elif client["last_checker_status"] != 0:

2411

logger.warning(

2412

"disabling client {0} - Client "

2413

"last checker failed with error code {1}"

2414

.format(client_name,

2415

client["last_checker_status"]))

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:

2416

2250

client["enabled"] = False

2417

2251

else:

2418

2252

client["expires"] = (datetime.datetime

2419

2253

.utcnow()

2420

2254

+ client["timeout"])

2421

logger.debug("Last checker succeeded,"

2422

" keeping {0} enabled"

2423

.format(client_name))

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

2424

2284

try:

2425

client["secret"] = (

2426

pgp.decrypt(client["encrypted_secret"],

2427

client_settings[client_name]

2428

["secret"]))

2429

except PGPError:

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:

2430

2291

# If decryption fails, we use secret from new settings

2431

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

2432

.format(client_name))

2433

client["secret"] = (

2292

tcp_server.clients[client_name].secret = (

2434

2293

client_settings[client_name]["secret"])

2435

2294

2436

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

2437

for client_name in (set(old_client_settings)

2438

- set(client_settings)):

2439

del clients_data[client_name]

2440

for client_name in (set(client_settings)

2441

- set(old_client_settings)):

2442

clients_data[client_name] = client_settings[client_name]

2443

2444

# Create all client objects

2445

for client_name, client in clients_data.iteritems():

2446

tcp_server.clients[client_name] = client_class(

2447

name = client_name, settings = client)

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]))

2448

2304

2449

2305

if not tcp_server.clients:

2450

2306

logger.warning("No clients defined")

2451

2307

2452

2308

if not debug:

2453

2309

try:

2454

2310

with pidfile:

2462

2318

# "pidfile" was never created

2463

2319

pass

2464

2320

del pidfilename

2321

2465

2322

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

2466

2323

2467

2324

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

2468

2325

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

2469

2326

2470

2327

if use_dbus:

2471

@alternate_dbus_interfaces({"se.recompile.Mandos":

2472

"se.bsnet.fukt.Mandos"})

2473

class MandosDBusService(DBusObjectWithProperties):

2328

class MandosDBusService(dbus.service.Object):

2474

2329

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

2475

2330

def __init__(self):

2476

2331

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

2477

2332

_interface = "se.recompile.Mandos"

2478

2333

2479

@dbus_interface_annotations(_interface)

2480

def _foo(self):

2481

return { "org.freedesktop.DBus.Property"

2482

".EmitsChangedSignal":

2483

"false"}

2484

2485

2334

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

2486

2335

def ClientAdded(self, objpath):

2487

2336

"D-Bus signal"

2529

2378

2530

2379

del _interface

2531

2380

2532

mandos_dbus_service = MandosDBusService()

2381

class MandosDBusServiceTransitional(MandosDBusService):

2382

__metaclass__ = AlternateDBusNamesMetaclass

2383

mandos_dbus_service = MandosDBusServiceTransitional()

2533

2384

2534

2385

def cleanup():

2535

2386

"Cleanup function; run on exit"

2542

2393

# Store client before exiting. Secrets are encrypted with key

2543

2394

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

2544

2395

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

2545

clients = {}

2546

with PGPEngine() as pgp:

2396

clients = []

2397

with Crypto() as crypt:

2547

2398

for client in tcp_server.clients.itervalues():

2548

2399

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

2549

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

2550

key)

2400

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

2401

key)

2551

2402

client_dict = {}

2552

2403

2553

# A list of attributes that can not be pickled

2554

# + secret.

2555

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

2556

"checker"))

2404

# A list of attributes that will not be stored when

2405

# shutting down.

2406

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

2557

2407

for name, typ in (inspect.getmembers

2558

2408

(dbus.service.Object)):

2559

2409

exclude.add(name)

2564

2414

if attr not in exclude:

2565

2415

client_dict[attr] = getattr(client, attr)

2566

2416

2567

clients[client.name] = client_dict

2417

clients.append(client_dict)

2568

2418

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

2569

2419

2570

2420

try:

2571

with (tempfile.NamedTemporaryFile

2572

(mode='wb', suffix=".pickle", prefix='clients-',

2573

dir=os.path.dirname(stored_state_path),

2574

delete=False)) as stored_state:

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:

2575

2424

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

2576

tempname=stored_state.name

2577

os.rename(tempname, stored_state_path)

2578

2425

except (IOError, OSError) as e:

2579

if not debug:

2580

try:

2581

os.remove(tempname)

2582

except NameError:

2583

pass

2584

if e.errno in (errno.ENOENT, errno.EACCES, errno.EEXIST):

2585

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

2586

.format(os.strerror(e.errno)))

2587

else:

2588

logger.warning("Could not save persistent state:",

2589

exc_info=e)

2590

raise 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

2591

2430

2592

2431

# Delete all clients, and settings from config

2593

2432

while tcp_server.clients:

2620

2459

service.port = tcp_server.socket.getsockname()[1]

2621

2460

if use_ipv6:

2622

2461

logger.info("Now listening on address %r, port %d,"

2623

" flowinfo %d, scope_id %d",

2624

*tcp_server.socket.getsockname())

2462

" flowinfo %d, scope_id %d"

2463

% tcp_server.socket.getsockname())

2625

2464

else: # IPv4

2626

logger.info("Now listening on address %r, port %d",

2627

*tcp_server.socket.getsockname())

2465

logger.info("Now listening on address %r, port %d"

2466

% tcp_server.socket.getsockname())

2628

2467

2629

2468

#service.interface = tcp_server.socket.getsockname()[3]

2630

2469

2633

2472

try:

2634

2473

service.activate()

2635

2474

except dbus.exceptions.DBusException as error:

2636

logger.critical("D-Bus Exception", exc_info=error)

2475

logger.critical("DBusException: %s", error)

2637

2476

cleanup()

2638

2477

sys.exit(1)

2639

2478

# End of Avahi example code

2646

2485

logger.debug("Starting main loop")

2647

2486

main_loop.run()

2648

2487

except AvahiError as error:

2649

logger.critical("Avahi Error", exc_info=error)

2488

logger.critical("AvahiError: %s", error)

2650

2489

cleanup()

2651

2490

sys.exit(1)

2652

2491

except KeyboardInterrupt:

2657

2496

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

2658

2497

cleanup()

2659

2498

2499

2660

2500

if __name__ == '__main__':

2661

2501

main()