/mandos/trunk : revision 505.1.22

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

import collections

72

68

73

69

import dbus

74

70

import dbus.service

79

75

import ctypes.util

80

76

import xml.dom.minidom

81

77

import inspect

78

import GnuPGInterface

82

79

83

80

try:

84

81

SO_BINDTODEVICE = socket.SO_BINDTODEVICE

88

85

except ImportError:

89

86

SO_BINDTODEVICE = None

90

87

91

version = "1.6.1"

88

version = "1.4.1"

92

89

stored_state_file = "clients.pickle"

93

90

94

91

logger = logging.getLogger()

113

110

return interface_index

114

111

115

112

116

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

113

def initlogger(level=logging.WARNING):

117

114

"""init logger and add loglevel"""

118

115

119

116

syslogger.setFormatter(logging.Formatter

121

118

' %(message)s'))

122

119

logger.addHandler(syslogger)

123

120

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)

121

console = logging.StreamHandler()

122

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

123

' [%(process)d]:'

124

' %(levelname)s:'

125

' %(message)s'))

126

logger.addHandler(console)

131

127

logger.setLevel(level)

132

128

133

129

139

135

class PGPEngine(object):

140

136

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

141

137

def __init__(self):

138

self.gnupg = GnuPGInterface.GnuPG()

142

139

self.tempdir = tempfile.mkdtemp(prefix="mandos-")

143

self.gnupgargs = ['--batch',

144

'--home', self.tempdir,

145

'--force-mdc',

146

'--quiet',

147

'--no-use-agent']

140

self.gnupg = GnuPGInterface.GnuPG()

141

self.gnupg.options.meta_interactive = False

142

self.gnupg.options.homedir = self.tempdir

143

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

144

'--quiet'])

148

145

149

146

def __enter__(self):

150

147

return self

151

148

152

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

149

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

153

150

self._cleanup()

154

151

return False

155

152

172

169

def password_encode(self, password):

173

170

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

174

171

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

175

encoded = b"mandos" + binascii.hexlify(password)

176

if len(encoded) > 2048:

177

# GnuPG can't handle long passwords, so encode differently

178

encoded = (b"mandos" + password.replace(b"\\", b"\\\\")

179

.replace(b"\n", b"\\n")

180

.replace(b"\0", b"\\x00"))

181

return encoded

172

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

182

173

183

174

def encrypt(self, data, password):

184

passphrase = self.password_encode(password)

185

with tempfile.NamedTemporaryFile(dir=self.tempdir

186

) as passfile:

187

passfile.write(passphrase)

188

passfile.flush()

189

proc = subprocess.Popen(['gpg', '--symmetric',

190

'--passphrase-file',

191

passfile.name]

192

+ self.gnupgargs,

193

stdin = subprocess.PIPE,

194

stdout = subprocess.PIPE,

195

stderr = subprocess.PIPE)

196

ciphertext, err = proc.communicate(input = data)

197

if proc.returncode != 0:

198

raise PGPError(err)

175

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

176

with open(os.devnull) as devnull:

177

try:

178

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

179

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

180

attach_fhs={'stderr': devnull})

181

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

182

f.write(data)

183

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

184

ciphertext = f.read()

185

proc.wait()

186

except IOError as e:

187

raise PGPError(e)

188

self.gnupg.passphrase = None

199

189

return ciphertext

200

190

201

191

def decrypt(self, data, password):

202

passphrase = self.password_encode(password)

203

with tempfile.NamedTemporaryFile(dir = self.tempdir

204

) as passfile:

205

passfile.write(passphrase)

206

passfile.flush()

207

proc = subprocess.Popen(['gpg', '--decrypt',

208

'--passphrase-file',

209

passfile.name]

210

+ self.gnupgargs,

211

stdin = subprocess.PIPE,

212

stdout = subprocess.PIPE,

213

stderr = subprocess.PIPE)

214

decrypted_plaintext, err = proc.communicate(input

215

= data)

216

if proc.returncode != 0:

217

raise PGPError(err)

192

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

193

with open(os.devnull) as devnull:

194

try:

195

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

196

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

197

attach_fhs={'stderr': devnull})

198

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

199

f.write(data)

200

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

201

decrypted_plaintext = f.read()

202

proc.wait()

203

except IOError as e:

204

raise PGPError(e)

205

self.gnupg.passphrase = None

218

206

return decrypted_plaintext

219

207

220

208

209

221

210

class AvahiError(Exception):

222

211

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

223

212

self.value = value

240

229

Used to optionally bind to the specified interface.

241

230

name: string; Example: 'Mandos'

242

231

type: string; Example: '_mandos._tcp'.

243

See <https://www.iana.org/assignments/service-names-port-numbers>

232

See <http://www.dns-sd.org/ServiceTypes.html>

244

233

port: integer; what port to announce

245

234

TXT: list of strings; TXT record for the service

246

235

domain: string; Domain to publish on, default to .local if empty.

252

241

server: D-Bus Server

253

242

bus: dbus.SystemBus()

254

243

"""

255

256

244

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

257

245

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

258

246

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

271

259

self.server = None

272

260

self.bus = bus

273

261

self.entry_group_state_changed_match = None

274

275

262

def rename(self):

276

263

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

277

264

if self.rename_count >= self.max_renames:

287

274

try:

288

275

self.add()

289

276

except dbus.exceptions.DBusException as error:

290

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

277

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

291

278

self.cleanup()

292

279

os._exit(1)

293

280

self.rename_count += 1

294

295

281

def remove(self):

296

282

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

297

283

if self.entry_group_state_changed_match is not None:

299

285

self.entry_group_state_changed_match = None

300

286

if self.group is not None:

301

287

self.group.Reset()

302

303

288

def add(self):

304

289

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

305

290

self.remove()

322

307

dbus.UInt16(self.port),

323

308

avahi.string_array_to_txt_array(self.TXT))

324

309

self.group.Commit()

325

326

310

def entry_group_state_changed(self, state, error):

327

311

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

328

312

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

335

319

elif state == avahi.ENTRY_GROUP_FAILURE:

336

320

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

337

321

unicode(error))

338

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

339

.format(error))

340

322

raise AvahiGroupError("State changed: %s"

323

% unicode(error))

341

324

def cleanup(self):

342

325

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

343

326

if self.group is not None:

348

331

pass

349

332

self.group = None

350

333

self.remove()

351

352

334

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

353

335

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

354

336

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

373

355

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

374

356

else:

375

357

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

376

377

358

def activate(self):

378

359

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

379

360

if self.server is None:

386

367

self.server_state_changed)

387

368

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

388

369

389

390

370

class AvahiServiceToSyslog(AvahiService):

391

371

def rename(self):

392

372

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

393

373

ret = AvahiService.rename(self)

394

374

syslogger.setFormatter(logging.Formatter

395

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

396

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

397

.format(self.name)))

375

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

376

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

377

% self.name))

398

378

return ret

399

379

400

401

380

def timedelta_to_milliseconds(td):

402

381

"Convert a datetime.timedelta() to milliseconds"

403

382

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

404

383

+ (td.seconds * 1000)

405

384

+ (td.microseconds // 1000))

406

407

385

408

386

class Client(object):

409

387

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

410

388

435

413

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

436

414

last_checker_status: integer between 0 and 255 reflecting exit

437

415

status of last checker. -1 reflects crashed

438

checker, -2 means no checker completed yet.

416

checker, or None.

439

417

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

440

418

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

441

419

D-Bus identifiers

442

420

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

443

421

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

444

422

until this client is disabled

445

extended_timeout: extra long timeout when secret has been sent

423

extended_timeout: extra long timeout when password has been sent

446

424

runtime_expansions: Allowed attributes for runtime expansion.

447

425

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

448

426

disabled, or None

449

server_settings: The server_settings dict from main()

450

427

"""

451

428

452

429

runtime_expansions = ("approval_delay", "approval_duration",

453

"created", "enabled", "expires",

454

"fingerprint", "host", "interval",

455

"last_approval_request", "last_checked_ok",

430

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

431

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

456

432

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

457

client_defaults = { "timeout": "PT5M",

458

"extended_timeout": "PT15M",

459

"interval": "PT2M",

433

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

434

"extended_timeout": "15m",

435

"interval": "2m",

460

436

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

461

437

"host": "",

462

"approval_delay": "PT0S",

463

"approval_duration": "PT1S",

438

"approval_delay": "0s",

439

"approval_duration": "1s",

464

440

"approved_by_default": "True",

465

441

"enabled": "True",

466

442

}

479

455

480

456

def approval_delay_milliseconds(self):

481

457

return timedelta_to_milliseconds(self.approval_delay)

482

458

483

459

@staticmethod

484

460

def config_parser(config):

485

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

461

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

486

462

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

487

with exceptions for any special settings as defined above.

488

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

489

value given the same arguments.

490

"""

463

with exceptions for any special settings as defined above"""

491

464

settings = {}

492

465

for client_name in config.sections():

493

466

section = dict(config.items(client_name))

497

470

# Reformat values from string types to Python types

498

471

client["approved_by_default"] = config.getboolean(

499

472

client_name, "approved_by_default")

500

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

501

"enabled")

473

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

502

474

503

475

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

504

476

.replace(" ", ""))

510

482

"rb") as secfile:

511

483

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

512

484

else:

513

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

514

.format(section))

485

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

486

% section)

515

487

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

516

488

client["extended_timeout"] = string_to_delta(

517

489

section["extended_timeout"])

523

495

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

524

496

client["last_approval_request"] = None

525

497

client["last_checked_ok"] = None

526

client["last_checker_status"] = -2

527

498

client["last_checker_status"] = None

499

if client["enabled"]:

500

client["last_enabled"] = datetime.datetime.utcnow()

501

client["expires"] = (datetime.datetime.utcnow()

502

+ client["timeout"])

503

else:

504

client["last_enabled"] = None

505

client["expires"] = None

506

528

507

return settings

529

530

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

508

509

510

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

511

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

512

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

513

attribute."""

531

514

self.name = name

532

if server_settings is None:

533

server_settings = {}

534

self.server_settings = server_settings

535

515

# adding all client settings

536

516

for setting, value in settings.iteritems():

537

517

setattr(self, setting, value)

538

518

539

if self.enabled:

540

if not hasattr(self, "last_enabled"):

541

self.last_enabled = datetime.datetime.utcnow()

542

if not hasattr(self, "expires"):

543

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

544

+ self.timeout)

545

else:

546

self.last_enabled = None

547

self.expires = None

548

549

519

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

550

520

# Uppercase and remove spaces from fingerprint for later

551

521

# comparison purposes with return value from the fingerprint()

552

522

# function

553

523

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

554

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

555

datetime.datetime.utcnow())

556

524

self.created = settings.get("created", datetime.datetime.utcnow())

525

557

526

# attributes specific for this server instance

558

527

self.checker = None

559

528

self.checker_initiator_tag = None

587

556

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

588

557

# Already enabled

589

558

return

559

self.send_changedstate()

590

560

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

591

561

self.enabled = True

592

562

self.last_enabled = datetime.datetime.utcnow()

593

563

self.init_checker()

594

self.send_changedstate()

595

564

596

565

def disable(self, quiet=True):

597

566

"""Disable this client."""

598

567

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

599

568

return False

600

569

if not quiet:

570

self.send_changedstate()

571

if not quiet:

601

572

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

602

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

573

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

603

574

gobject.source_remove(self.disable_initiator_tag)

604

575

self.disable_initiator_tag = None

605

576

self.expires = None

606

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

577

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

607

578

gobject.source_remove(self.checker_initiator_tag)

608

579

self.checker_initiator_tag = None

609

580

self.stop_checker()

610

581

self.enabled = False

611

if not quiet:

612

self.send_changedstate()

613

582

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

614

583

return False

615

584

619

588

def init_checker(self):

620

589

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

621

590

# and every interval from then on.

622

if self.checker_initiator_tag is not None:

623

gobject.source_remove(self.checker_initiator_tag)

624

591

self.checker_initiator_tag = (gobject.timeout_add

625

592

(self.interval_milliseconds(),

626

593

self.start_checker))

627

594

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

628

if self.disable_initiator_tag is not None:

629

gobject.source_remove(self.disable_initiator_tag)

630

595

self.disable_initiator_tag = (gobject.timeout_add

631

596

(self.timeout_milliseconds(),

632

597

self.disable))

651

616

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

652

617

vars(self))

653

618

654

def checked_ok(self):

655

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

656

self.last_checked_ok = datetime.datetime.utcnow()

657

self.last_checker_status = 0

658

self.bump_timeout()

659

660

def bump_timeout(self, timeout=None):

661

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

619

def checked_ok(self, timeout=None):

620

"""Bump up the timeout for this client.

621

622

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

623

alive and well.

624

"""

662

625

if timeout is None:

663

626

timeout = self.timeout

627

self.last_checked_ok = datetime.datetime.utcnow()

664

628

if self.disable_initiator_tag is not None:

665

629

gobject.source_remove(self.disable_initiator_tag)

666

self.disable_initiator_tag = None

667

630

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

668

631

self.disable_initiator_tag = (gobject.timeout_add

669

632

(timedelta_to_milliseconds

679

642

If a checker already exists, leave it running and do

680

643

nothing."""

681

644

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

682

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

683

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

684

# would inevitably timeout, since no checker would get a

685

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

645

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

646

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

647

# client would inevitably timeout, since no checker would get

648

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

686

649

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

687

650

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

688

651

# should be.

702

665

self.current_checker_command)

703

666

# Start a new checker if needed

704

667

if self.checker is None:

705

# Escape attributes for the shell

706

escaped_attrs = dict(

707

(attr, re.escape(unicode(getattr(self, attr))))

708

for attr in

709

self.runtime_expansions)

710

668

try:

711

command = self.checker_command % escaped_attrs

712

except TypeError as error:

713

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

714

self.checker_command, exc_info=error)

715

return True # Try again later

669

# In case checker_command has exactly one % operator

670

command = self.checker_command % self.host

671

except TypeError:

672

# Escape attributes for the shell

673

escaped_attrs = dict(

674

(attr,

675

re.escape(unicode(str(getattr(self, attr, "")),

676

errors=

677

'replace')))

678

for attr in

679

self.runtime_expansions)

680

681

try:

682

command = self.checker_command % escaped_attrs

683

except TypeError as error:

684

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

685

' %s', self.checker_command, error)

686

return True # Try again later

716

687

self.current_checker_command = command

717

688

try:

718

689

logger.info("Starting checker %r for %s",

721

692

# in normal mode, that is already done by daemon(),

722

693

# and in debug mode we don't want to. (Stdin is

723

694

# always replaced by /dev/null.)

724

# The exception is when not debugging but nevertheless

725

# running in the foreground; use the previously

726

# created wnull.

727

popen_args = {}

728

if (not self.server_settings["debug"]

729

and self.server_settings["foreground"]):

730

popen_args.update({"stdout": wnull,

731

"stderr": wnull })

732

695

self.checker = subprocess.Popen(command,

733

696

close_fds=True,

734

shell=True, cwd="/",

735

**popen_args)

736

except OSError as error:

737

logger.error("Failed to start subprocess",

738

exc_info=error)

739

return True

740

self.checker_callback_tag = (gobject.child_watch_add

741

(self.checker.pid,

742

self.checker_callback,

743

data=command))

744

# The checker may have completed before the gobject

745

# watch was added. Check for this.

746

try:

697

shell=True, cwd="/")

698

self.checker_callback_tag = (gobject.child_watch_add

699

(self.checker.pid,

700

self.checker_callback,

701

data=command))

702

# The checker may have completed before the gobject

703

# watch was added. Check for this.

747

704

pid, status = os.waitpid(self.checker.pid, os.WNOHANG)

705

if pid:

706

gobject.source_remove(self.checker_callback_tag)

707

self.checker_callback(pid, status, command)

748

708

except OSError as error:

749

if error.errno == errno.ECHILD:

750

# This should never happen

751

logger.error("Child process vanished",

752

exc_info=error)

753

return True

754

raise

755

if pid:

756

gobject.source_remove(self.checker_callback_tag)

757

self.checker_callback(pid, status, command)

709

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

710

error)

758

711

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

759

712

return True

760

713

767

720

return

768

721

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

769

722

try:

770

self.checker.terminate()

723

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

771

724

#time.sleep(0.5)

772

725

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

773

# self.checker.kill()

726

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

774

727

except OSError as error:

775

728

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

776

729

raise

793

746

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

794

747

if byte_arrays and signature != "ay":

795

748

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

796

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

749

" signature %r" % signature)

797

750

def decorator(func):

798

751

func._dbus_is_property = True

799

752

func._dbus_interface = dbus_interface

807

760

return decorator

808

761

809

762

810

def dbus_interface_annotations(dbus_interface):

811

"""Decorator for marking functions returning interface annotations

812

813

Usage:

814

815

@dbus_interface_annotations("org.example.Interface")

816

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

817

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

818

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

819

"false"}

820

"""

821

def decorator(func):

822

func._dbus_is_interface = True

823

func._dbus_interface = dbus_interface

824

func._dbus_name = dbus_interface

825

return func

826

return decorator

827

828

829

def dbus_annotations(annotations):

830

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

831

Usage:

832

833

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

834

access="r")

835

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

836

"org.freedesktop.DBus.Property."

837

"EmitsChangedSignal": "false"})

838

def Property_dbus_property(self):

839

return dbus.Boolean(False)

840

"""

841

def decorator(func):

842

func._dbus_annotations = annotations

843

return func

844

return decorator

845

846

847

763

class DBusPropertyException(dbus.exceptions.DBusException):

848

764

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

849

765

"""

872

788

"""

873

789

874

790

@staticmethod

875

def _is_dbus_thing(thing):

876

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

877

878

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

879

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

880

"""

881

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

882

False)

791

def _is_dbus_property(obj):

792

return getattr(obj, "_dbus_is_property", False)

883

793

884

def _get_all_dbus_things(self, thing):

794

def _get_all_dbus_properties(self):

885

795

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

886

796

"""

887

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

888

name),

889

athing.__get__(self))

797

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

890

798

for cls in self.__class__.__mro__

891

for name, athing in

892

inspect.getmembers(cls,

893

self._is_dbus_thing(thing)))

799

for name, prop in

800

inspect.getmembers(cls, self._is_dbus_property))

894

801

895

802

def _get_dbus_property(self, interface_name, property_name):

896

803

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

898

805

"""

899

806

for cls in self.__class__.__mro__:

900

807

for name, value in (inspect.getmembers

901

(cls,

902

self._is_dbus_thing("property"))):

808

(cls, self._is_dbus_property)):

903

809

if (value._dbus_name == property_name

904

810

and value._dbus_interface == interface_name):

905

811

return value.__get__(self)

934

840

# signatures other than "ay".

935

841

if prop._dbus_signature != "ay":

936

842

raise ValueError

937

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

938

for byte in value))

843

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

844

for byte in value))

939

845

prop(value)

940

846

941

847

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

947

853

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

948

854

"""

949

855

properties = {}

950

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

856

for name, prop in self._get_all_dbus_properties():

951

857

if (interface_name

952

858

and interface_name != prop._dbus_interface):

953

859

# Interface non-empty but did not match

968

874

path_keyword='object_path',

969

875

connection_keyword='connection')

970

876

def Introspect(self, object_path, connection):

971

"""Overloading of standard D-Bus method.

972

973

Inserts property tags and interface annotation tags.

877

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

974

878

"""

975

879

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

976

880

connection)

983

887

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

984

888

return e

985

889

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

986

# Add property tags

987

890

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

988

891

for name, prop

989

in self._get_all_dbus_things("property")

892

in self._get_all_dbus_properties()

990

893

if prop._dbus_interface

991

894

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

992

895

if_tag.appendChild(tag)

993

# Add annotation tags

994

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

995

for tag in if_tag.getElementsByTagName(typ):

996

annots = dict()

997

for name, prop in (self.

998

_get_all_dbus_things(typ)):

999

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

1000

and prop._dbus_interface

1001

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

1002

annots.update(getattr

1003

(prop,

1004

"_dbus_annotations",

1005

{}))

1006

for name, value in annots.iteritems():

1007

ann_tag = document.createElement(

1008

"annotation")

1009

ann_tag.setAttribute("name", name)

1010

ann_tag.setAttribute("value", value)

1011

tag.appendChild(ann_tag)

1012

# Add interface annotation tags

1013

for annotation, value in dict(

1014

itertools.chain.from_iterable(

1015

annotations().iteritems()

1016

for name, annotations in

1017

self._get_all_dbus_things("interface")

1018

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

1019

)).iteritems():

1020

ann_tag = document.createElement("annotation")

1021

ann_tag.setAttribute("name", annotation)

1022

ann_tag.setAttribute("value", value)

1023

if_tag.appendChild(ann_tag)

1024

896

# Add the names to the return values for the

1025

897

# "org.freedesktop.DBus.Properties" methods

1026

898

if (if_tag.getAttribute("name")

1041

913

except (AttributeError, xml.dom.DOMException,

1042

914

xml.parsers.expat.ExpatError) as error:

1043

915

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

1044

exc_info=error)

916

error)

1045

917

return xmlstring

1046

918

1047

919

1048

def datetime_to_dbus(dt, variant_level=0):

920

def datetime_to_dbus (dt, variant_level=0):

1049

921

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

1050

922

if dt is None:

1051

923

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

1053

925

variant_level=variant_level)

1054

926

1055

927

1056

def alternate_dbus_interfaces(alt_interface_names, deprecate=True):

1057

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

1058

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

1059

interface names according to the "alt_interface_names" mapping.

1060

Usage:

1061

1062

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

1063

"net.example.AlternateInterface"})

1064

class SampleDBusObject(dbus.service.Object):

1065

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

1066

def SampleDBusMethod():

1067

pass

1068

1069

The above "SampleDBusMethod" on "SampleDBusObject" will be

1070

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

1071

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

1072

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

1073

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

1074

1075

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

1076

(from DBusObjectWithProperties) and interfaces (from the

1077

dbus_interface_annotations decorator).

928

class AlternateDBusNamesMetaclass(DBusObjectWithProperties

929

.__metaclass__):

930

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

931

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

1078

932

"""

1079

def wrapper(cls):

1080

for orig_interface_name, alt_interface_name in (

1081

alt_interface_names.iteritems()):

1082

attr = {}

1083

interface_names = set()

1084

# Go though all attributes of the class

1085

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

933

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

934

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

935

# methods, signals, or properties in them

936

for base in (b for b in bases

937

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

938

# Go though all attributes of the base class

939

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

1086

940

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

1087

941

# with the wrong interface name

1088

942

if (not hasattr(attribute, "_dbus_interface")

1089

943

or not attribute._dbus_interface

1090

.startswith(orig_interface_name)):

944

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

1091

945

continue

1092

946

# Create an alternate D-Bus interface name based on

1093

947

# the current name

1094

948

alt_interface = (attribute._dbus_interface

1095

.replace(orig_interface_name,

1096

alt_interface_name))

1097

interface_names.add(alt_interface)

949

.replace("se.recompile.Mandos",

950

"se.bsnet.fukt.Mandos"))

1098

951

# Is this a D-Bus signal?

1099

952

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

1100

# Extract the original non-method undecorated

1101

# function by black magic

953

# Extract the original non-method function by

954

# black magic

1102

955

nonmethod_func = (dict(

1103

956

zip(attribute.func_code.co_freevars,

1104

957

attribute.__closure__))["func"]

1115

968

nonmethod_func.func_name,

1116

969

nonmethod_func.func_defaults,

1117

970

nonmethod_func.func_closure)))

1118

# Copy annotations, if any

1119

try:

1120

new_function._dbus_annotations = (

1121

dict(attribute._dbus_annotations))

1122

except AttributeError:

1123

pass

1124

971

# Define a creator of a function to call both the

1125

# original and alternate functions, so both the

1126

# original and alternate signals gets sent when

1127

# the function is called

972

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

973

# signals gets sent when the function is called

1128

974

def fixscope(func1, func2):

1129

975

"""This function is a scope container to pass

1130

976

func1 and func2 to the "call_both" function

1137

983

return call_both

1138

984

# Create the "call_both" function and add it to

1139

985

# the class

1140

attr[attrname] = fixscope(attribute, new_function)

986

attr[attrname] = fixscope(attribute,

987

new_function)

1141

988

# Is this a D-Bus method?

1142

989

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

1143

990

# Create a new, but exactly alike, function

1154

1001

attribute.func_name,

1155

1002

attribute.func_defaults,

1156

1003

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

1004

# Is this a D-Bus property?

1164

1005

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

1165

1006

# Create a new, but exactly alike, function

1179

1020

attribute.func_name,

1180

1021

attribute.func_defaults,

1181

1022

attribute.func_closure)))

1182

# Copy annotations, if any

1183

try:

1184

attr[attrname]._dbus_annotations = (

1185

dict(attribute._dbus_annotations))

1186

except AttributeError:

1187

pass

1188

# Is this a D-Bus interface?

1189

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

1190

# Create a new, but exactly alike, function

1191

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

1192

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

1193

# to the class.

1194

attr[attrname] = (dbus_interface_annotations

1195

(alt_interface)

1196

(types.FunctionType

1197

(attribute.func_code,

1198

attribute.func_globals,

1199

attribute.func_name,

1200

attribute.func_defaults,

1201

attribute.func_closure)))

1202

if deprecate:

1203

# Deprecate all alternate interfaces

1204

iname="_AlternateDBusNames_interface_annotation{0}"

1205

for interface_name in interface_names:

1206

@dbus_interface_annotations(interface_name)

1207

def func(self):

1208

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

1209

"true" }

1210

# Find an unused name

1211

for aname in (iname.format(i)

1212

for i in itertools.count()):

1213

if aname not in attr:

1214

attr[aname] = func

1215

break

1216

if interface_names:

1217

# Replace the class with a new subclass of it with

1218

# methods, signals, etc. as created above.

1219

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

1220

(cls,), attr)

1221

return cls

1222

return wrapper

1223

1224

1225

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

1226

"se.bsnet.fukt.Mandos"})

1023

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

1024

1025

1227

1026

class ClientDBus(Client, DBusObjectWithProperties):

1228

1027

"""A Client class using D-Bus

1229

1028

1240

1039

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

1241

1040

self.bus = bus

1242

1041

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

1042

self._approvals_pending = 0

1043

1044

self._approvals_pending = 0

1243

1045

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

1244

1046

# the D-Bus

1245

1047

client_object_name = unicode(self.name).translate(

1249

1051

("/clients/" + client_object_name))

1250

1052

DBusObjectWithProperties.__init__(self, self.bus,

1251

1053

self.dbus_object_path)

1252

1054

1253

1055

def notifychangeproperty(transform_func,

1254

1056

dbus_name, type_func=lambda x: x,

1255

1057

variant_level=1):

1278

1080

1279

1081

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

1280

1082

1083

1281

1084

expires = notifychangeproperty(datetime_to_dbus, "Expires")

1282

1085

approvals_pending = notifychangeproperty(dbus.Boolean,

1283

1086

"ApprovalPending",

1290

1093

checker is not None)

1291

1094

last_checked_ok = notifychangeproperty(datetime_to_dbus,

1292

1095

"LastCheckedOK")

1293

last_checker_status = notifychangeproperty(dbus.Int16,

1294

"LastCheckerStatus")

1295

1096

last_approval_request = notifychangeproperty(

1296

1097

datetime_to_dbus, "LastApprovalRequest")

1297

1098

approved_by_default = notifychangeproperty(dbus.Boolean,

1365

1166

return False

1366

1167

1367

1168

def approve(self, value=True):

1169

self.send_changedstate()

1368

1170

self.approved = value

1369

1171

gobject.timeout_add(timedelta_to_milliseconds

1370

1172

(self.approval_duration),

1371

1173

self._reset_approved)

1372

self.send_changedstate()

1174

1373

1175

1374

1176

## D-Bus methods, signals & properties

1375

1177

_interface = "se.recompile.Mandos.Client"

1376

1178

1377

## Interfaces

1378

1379

@dbus_interface_annotations(_interface)

1380

def _foo(self):

1381

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

1382

"false"}

1383

1384

1179

## Signals

1385

1180

1386

1181

# CheckerCompleted - signal

1422

1217

"D-Bus signal"

1423

1218

return self.need_approval()

1424

1219

1220

# NeRwequest - signal

1221

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

1222

def NewRequest(self, ip):

1223

"""D-Bus signal

1224

Is sent after a client request a password.

1225

"""

1226

pass

1227

1425

1228

## Methods

1426

1229

1427

1230

# Approve - method

1537

1340

return

1538

1341

return datetime_to_dbus(self.last_checked_ok)

1539

1342

1540

# LastCheckerStatus - property

1541

@dbus_service_property(_interface, signature="n",

1542

access="read")

1543

def LastCheckerStatus_dbus_property(self):

1544

return dbus.Int16(self.last_checker_status)

1545

1546

1343

# Expires - property

1547

1344

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

1548

1345

def Expires_dbus_property(self):

1559

1356

def Timeout_dbus_property(self, value=None):

1560

1357

if value is None: # get

1561

1358

return dbus.UInt64(self.timeout_milliseconds())

1562

old_timeout = self.timeout

1563

1359

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

1564

# Reschedule disabling

1565

if self.enabled:

1566

now = datetime.datetime.utcnow()

1567

self.expires += self.timeout - old_timeout

1568

if self.expires <= now:

1569

# The timeout has passed

1570

self.disable()

1571

else:

1572

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

1573

is None):

1574

return

1575

gobject.source_remove(self.disable_initiator_tag)

1576

self.disable_initiator_tag = (

1577

gobject.timeout_add(

1578

timedelta_to_milliseconds(self.expires - now),

1579

self.disable))

1360

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

1361

return

1362

# Reschedule timeout

1363

gobject.source_remove(self.disable_initiator_tag)

1364

self.disable_initiator_tag = None

1365

self.expires = None

1366

time_to_die = timedelta_to_milliseconds((self

1367

.last_checked_ok

1368

+ self.timeout)

1369

- datetime.datetime

1370

.utcnow())

1371

if time_to_die <= 0:

1372

# The timeout has passed

1373

self.disable()

1374

else:

1375

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

1376

+ datetime.timedelta(milliseconds =

1377

time_to_die))

1378

self.disable_initiator_tag = (gobject.timeout_add

1379

(time_to_die, self.disable))

1580

1380

1581

1381

# ExtendedTimeout - property

1582

1382

@dbus_service_property(_interface, signature="t",

1661

1461

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

1662

1462

1663

1463

1464

class ClientDBusTransitional(ClientDBus):

1465

__metaclass__ = AlternateDBusNamesMetaclass

1466

1467

1664

1468

class ClientHandler(socketserver.BaseRequestHandler, object):

1665

1469

"""A class to handle client connections.

1666

1470

1734

1538

except KeyError:

1735

1539

return

1736

1540

1541

if self.server.use_dbus:

1542

# Emit D-Bus signal

1543

client.NewRequest(str(self.client_address))

1544

1737

1545

if client.approval_delay:

1738

1546

delay = client.approval_delay

1739

1547

client.approvals_pending += 1

1770

1578

#wait until timeout or approved

1771

1579

time = datetime.datetime.now()

1772

1580

client.changedstate.acquire()

1773

client.changedstate.wait(

1774

float(timedelta_to_milliseconds(delay)

1775

/ 1000))

1581

(client.changedstate.wait

1582

(float(client.timedelta_to_milliseconds(delay)

1583

/ 1000)))

1776

1584

client.changedstate.release()

1777

1585

time2 = datetime.datetime.now()

1778

1586

if (time2 - time) >= delay:

1794

1602

try:

1795

1603

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

1796

1604

except gnutls.errors.GNUTLSError as error:

1797

logger.warning("gnutls send failed",

1798

exc_info=error)

1605

logger.warning("gnutls send failed")

1799

1606

return

1800

1607

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

1801

1608

sent, len(client.secret)

1804

1611

1805

1612

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

1806

1613

# bump the timeout using extended_timeout

1807

client.bump_timeout(client.extended_timeout)

1614

client.checked_ok(client.extended_timeout)

1808

1615

if self.server.use_dbus:

1809

1616

# Emit D-Bus signal

1810

1617

client.GotSecret()

1815

1622

try:

1816

1623

session.bye()

1817

1624

except gnutls.errors.GNUTLSError as error:

1818

logger.warning("GnuTLS bye failed",

1819

exc_info=error)

1625

logger.warning("GnuTLS bye failed")

1820

1626

1821

1627

@staticmethod

1822

1628

def peer_certificate(session):

1894

1700

def process_request(self, request, address):

1895

1701

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

1896

1702

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

1897

args = (request, address))

1703

args = (request,

1704

address))

1898

1705

proc.start()

1899

1706

return proc

1900

1707

1928

1735

use_ipv6: Boolean; to use IPv6 or not

1929

1736

"""

1930

1737

def __init__(self, server_address, RequestHandlerClass,

1931

interface=None, use_ipv6=True, socketfd=None):

1932

"""If socketfd is set, use that file descriptor instead of

1933

creating a new one with socket.socket().

1934

"""

1738

interface=None, use_ipv6=True):

1935

1739

self.interface = interface

1936

1740

if use_ipv6:

1937

1741

self.address_family = socket.AF_INET6

1938

if socketfd is not None:

1939

# Save the file descriptor

1940

self.socketfd = socketfd

1941

# Save the original socket.socket() function

1942

self.socket_socket = socket.socket

1943

# To implement --socket, we monkey patch socket.socket.

1944

#

1945

# (When socketserver.TCPServer is a new-style class, we

1946

# could make self.socket into a property instead of monkey

1947

# patching socket.socket.)

1948

#

1949

# Create a one-time-only replacement for socket.socket()

1950

@functools.wraps(socket.socket)

1951

def socket_wrapper(*args, **kwargs):

1952

# Restore original function so subsequent calls are

1953

# not affected.

1954

socket.socket = self.socket_socket

1955

del self.socket_socket

1956

# This time only, return a new socket object from the

1957

# saved file descriptor.

1958

return socket.fromfd(self.socketfd, *args, **kwargs)

1959

# Replace socket.socket() function with wrapper

1960

socket.socket = socket_wrapper

1961

# The socketserver.TCPServer.__init__ will call

1962

# socket.socket(), which might be our replacement,

1963

# socket_wrapper(), if socketfd was set.

1964

1742

socketserver.TCPServer.__init__(self, server_address,

1965

1743

RequestHandlerClass)

1966

1967

1744

def server_bind(self):

1968

1745

"""This overrides the normal server_bind() function

1969

1746

to bind to an interface if one was specified, and also NOT to

1977

1754

try:

1978

1755

self.socket.setsockopt(socket.SOL_SOCKET,

1979

1756

SO_BINDTODEVICE,

1980

str(self.interface + '\0'))

1757

str(self.interface

1758

+ '\0'))

1981

1759

except socket.error as error:

1982

if error.errno == errno.EPERM:

1983

logger.error("No permission to bind to"

1984

" interface %s", self.interface)

1985

elif error.errno == errno.ENOPROTOOPT:

1760

if error[0] == errno.EPERM:

1761

logger.error("No permission to"

1762

" bind to interface %s",

1763

self.interface)

1764

elif error[0] == errno.ENOPROTOOPT:

1986

1765

logger.error("SO_BINDTODEVICE not available;"

1987

1766

" cannot bind to interface %s",

1988

1767

self.interface)

1989

elif error.errno == errno.ENODEV:

1990

logger.error("Interface %s does not exist,"

1991

" cannot bind", self.interface)

1992

1768

else:

1993

1769

raise

1994

1770

# Only bind(2) the socket if we really need to.

1997

1773

if self.address_family == socket.AF_INET6:

1998

1774

any_address = "::" # in6addr_any

1999

1775

else:

2000

any_address = "0.0.0.0" # INADDR_ANY

1776

any_address = socket.INADDR_ANY

2001

1777

self.server_address = (any_address,

2002

1778

self.server_address[1])

2003

1779

elif not self.server_address[1]:

2024

1800

"""

2025

1801

def __init__(self, server_address, RequestHandlerClass,

2026

1802

interface=None, use_ipv6=True, clients=None,

2027

gnutls_priority=None, use_dbus=True, socketfd=None):

1803

gnutls_priority=None, use_dbus=True):

2028

1804

self.enabled = False

2029

1805

self.clients = clients

2030

1806

if self.clients is None:

2034

1810

IPv6_TCPServer.__init__(self, server_address,

2035

1811

RequestHandlerClass,

2036

1812

interface = interface,

2037

use_ipv6 = use_ipv6,

2038

socketfd = socketfd)

1813

use_ipv6 = use_ipv6)

2039

1814

def server_activate(self):

2040

1815

if self.enabled:

2041

1816

return socketserver.TCPServer.server_activate(self)

2054

1829

2055

1830

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

2056

1831

proc = None, client_object=None):

1832

condition_names = {

1833

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

1834

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

1835

# blocking).

1836

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

1837

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

1838

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

1839

# broken, usually for pipes and

1840

# sockets).

1841

}

1842

conditions_string = ' | '.join(name

1843

for cond, name in

1844

condition_names.iteritems()

1845

if cond & condition)

2057

1846

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

2058

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

1847

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

2059

1848

# Wait for other process to exit

2060

1849

proc.join()

2061

1850

return False

2119

1908

return True

2120

1909

2121

1910

2122

def rfc3339_duration_to_delta(duration):

2123

"""Parse an RFC 3339 "duration" and return a datetime.timedelta

2124

2125

>>> rfc3339_duration_to_delta("P7D")

2126

datetime.timedelta(7)

2127

>>> rfc3339_duration_to_delta("PT60S")

2128

datetime.timedelta(0, 60)

2129

>>> rfc3339_duration_to_delta("PT60M")

2130

datetime.timedelta(0, 3600)

2131

>>> rfc3339_duration_to_delta("PT24H")

2132

datetime.timedelta(1)

2133

>>> rfc3339_duration_to_delta("P1W")

2134

datetime.timedelta(7)

2135

>>> rfc3339_duration_to_delta("PT5M30S")

2136

datetime.timedelta(0, 330)

2137

>>> rfc3339_duration_to_delta("P1DT3M20S")

2138

datetime.timedelta(1, 200)

2139

"""

2140

2141

# Parsing an RFC 3339 duration with regular expressions is not

2142

# possible - there would have to be multiple places for the same

2143

# values, like seconds. The current code, while more esoteric, is

2144

# cleaner without depending on a parsing library. If Python had a

2145

# built-in library for parsing we would use it, but we'd like to

2146

# avoid excessive use of external libraries.

2147

2148

# New type for defining tokens, syntax, and semantics all-in-one

2149

Token = collections.namedtuple("Token",

2150

("regexp", # To match token; if

2151

# "value" is not None,

2152

# must have a "group"

2153

# containing digits

2154

"value", # datetime.timedelta or

2155

# None

2156

"followers")) # Tokens valid after

2157

# this token

2158

# RFC 3339 "duration" tokens, syntax, and semantics; taken from

2159

# the "duration" ABNF definition in RFC 3339, Appendix A.

2160

token_end = Token(re.compile(r"$"), None, frozenset())

2161

token_second = Token(re.compile(r"(\d+)S"),

2162

datetime.timedelta(seconds=1),

2163

frozenset((token_end,)))

2164

token_minute = Token(re.compile(r"(\d+)M"),

2165

datetime.timedelta(minutes=1),

2166

frozenset((token_second, token_end)))

2167

token_hour = Token(re.compile(r"(\d+)H"),

2168

datetime.timedelta(hours=1),

2169

frozenset((token_minute, token_end)))

2170

token_time = Token(re.compile(r"T"),

2171

None,

2172

frozenset((token_hour, token_minute,

2173

token_second)))

2174

token_day = Token(re.compile(r"(\d+)D"),

2175

datetime.timedelta(days=1),

2176

frozenset((token_time, token_end)))

2177

token_month = Token(re.compile(r"(\d+)M"),

2178

datetime.timedelta(weeks=4),

2179

frozenset((token_day, token_end)))

2180

token_year = Token(re.compile(r"(\d+)Y"),

2181

datetime.timedelta(weeks=52),

2182

frozenset((token_month, token_end)))

2183

token_week = Token(re.compile(r"(\d+)W"),

2184

datetime.timedelta(weeks=1),

2185

frozenset((token_end,)))

2186

token_duration = Token(re.compile(r"P"), None,

2187

frozenset((token_year, token_month,

2188

token_day, token_time,

2189

token_week))),

2190

# Define starting values

2191

value = datetime.timedelta() # Value so far

2192

found_token = None

2193

followers = frozenset(token_duration,) # Following valid tokens

2194

s = duration # String left to parse

2195

# Loop until end token is found

2196

while found_token is not token_end:

2197

# Search for any currently valid tokens

2198

for token in followers:

2199

match = token.regexp.match(s)

2200

if match is not None:

2201

# Token found

2202

if token.value is not None:

2203

# Value found, parse digits

2204

factor = int(match.group(1), 10)

2205

# Add to value so far

2206

value += factor * token.value

2207

# Strip token from string

2208

s = token.regexp.sub("", s, 1)

2209

# Go to found token

2210

found_token = token

2211

# Set valid next tokens

2212

followers = found_token.followers

2213

break

2214

else:

2215

# No currently valid tokens were found

2216

raise ValueError("Invalid RFC 3339 duration")

2217

# End token found

2218

return value

2219

2220

2221

1911

def string_to_delta(interval):

2222

1912

"""Parse a string and return a datetime.timedelta

2223

1913

2234

1924

>>> string_to_delta('5m 30s')

2235

1925

datetime.timedelta(0, 330)

2236

1926

"""

2237

2238

try:

2239

return rfc3339_duration_to_delta(interval)

2240

except ValueError:

2241

pass

2242

2243

1927

timevalue = datetime.timedelta(0)

2244

1928

for s in interval.split():

2245

1929

try:

2256

1940

elif suffix == "w":

2257

1941

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

2258

1942

else:

2259

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

2260

.format(suffix))

1943

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

2261

1944

except (ValueError, IndexError) as e:

2262

1945

raise ValueError(*(e.args))

2263

1946

timevalue += delta

2277

1960

sys.exit()

2278

1961

if not noclose:

2279

1962

# Close all standard open file descriptors

2280

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

1963

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

2281

1964

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

2282

1965

raise OSError(errno.ENODEV,

2283

"{0} not a character device"

2284

.format(os.devnull))

1966

"%s not a character device"

1967

% os.path.devnull)

2285

1968

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

2286

1969

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

2287

1970

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

2296

1979

2297

1980

parser = argparse.ArgumentParser()

2298

1981

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

2299

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

1982

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

2300

1983

help="show version number and exit")

2301

1984

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

2302

1985

help="Bind to interface IF")

2308

1991

help="Run self-test")

2309

1992

parser.add_argument("--debug", action="store_true",

2310

1993

help="Debug mode; run in foreground and log"

2311

" to terminal", default=None)

1994

" to terminal")

2312

1995

parser.add_argument("--debuglevel", metavar="LEVEL",

2313

1996

help="Debug level for stdout output")

2314

1997

parser.add_argument("--priority", help="GnuTLS"

2321

2004

" files")

2322

2005

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

2323

2006

dest="use_dbus", help="Do not provide D-Bus"

2324

" system bus interface", default=None)

2007

" system bus interface")

2325

2008

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

2326

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

2327

default=None)

2009

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

2328

2010

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

2329

2011

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

2330

" state", default=None)

2331

parser.add_argument("--socket", type=int,

2332

help="Specify a file descriptor to a network"

2333

" socket to use instead of creating one")

2012

" state")

2334

2013

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

2335

2014

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

2336

parser.add_argument("--foreground", action="store_true",

2337

help="Run in foreground", default=None)

2338

2015

2339

2016

options = parser.parse_args()

2340

2017

2349

2026

"port": "",

2350

2027

"debug": "False",

2351

2028

"priority":

2352

"SECURE256:!CTYPE-X.509:+CTYPE-OPENPGP:+SIGN-RSA-SHA224:+SIGN-RSA-RMD160",

2029

"SECURE256:!CTYPE-X.509:+CTYPE-OPENPGP",

2353

2030

"servicename": "Mandos",

2354

2031

"use_dbus": "True",

2355

2032

"use_ipv6": "True",

2356

2033

"debuglevel": "",

2357

2034

"restore": "True",

2358

"socket": "",

2359

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

2360

"foreground": "False",

2035

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

2361

2036

}

2362

2037

2363

2038

# Parse config file for server-global settings

2368

2043

# Convert the SafeConfigParser object to a dict

2369

2044

server_settings = server_config.defaults()

2370

2045

# Use the appropriate methods on the non-string config options

2371

for option in ("debug", "use_dbus", "use_ipv6", "foreground"):

2046

for option in ("debug", "use_dbus", "use_ipv6"):

2372

2047

server_settings[option] = server_config.getboolean("DEFAULT",

2373

2048

option)

2374

2049

if server_settings["port"]:

2375

2050

server_settings["port"] = server_config.getint("DEFAULT",

2376

2051

"port")

2377

if server_settings["socket"]:

2378

server_settings["socket"] = server_config.getint("DEFAULT",

2379

"socket")

2380

# Later, stdin will, and stdout and stderr might, be dup'ed

2381

# over with an opened os.devnull. But we don't want this to

2382

# happen with a supplied network socket.

2383

if 0 <= server_settings["socket"] <= 2:

2384

server_settings["socket"] = os.dup(server_settings

2385

["socket"])

2386

2052

del server_config

2387

2053

2388

2054

# Override the settings from the config file with command line

2390

2056

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

2391

2057

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

2392

2058

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

2393

"statedir", "socket", "foreground"):

2059

"statedir"):

2394

2060

value = getattr(options, option)

2395

2061

if value is not None:

2396

2062

server_settings[option] = value

2399

2065

for option in server_settings.keys():

2400

2066

if type(server_settings[option]) is str:

2401

2067

server_settings[option] = unicode(server_settings[option])

2402

# Force all boolean options to be boolean

2403

for option in ("debug", "use_dbus", "use_ipv6", "restore",

2404

"foreground"):

2405

server_settings[option] = bool(server_settings[option])

2406

# Debug implies foreground

2407

if server_settings["debug"]:

2408

server_settings["foreground"] = True

2409

2068

# Now we have our good server settings in "server_settings"

2410

2069

2411

2070

##################################################################

2417

2076

use_ipv6 = server_settings["use_ipv6"]

2418

2077

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

2419

2078

stored_state_file)

2420

foreground = server_settings["foreground"]

2421

2079

2422

2080

if debug:

2423

initlogger(debug, logging.DEBUG)

2081

initlogger(logging.DEBUG)

2424

2082

else:

2425

2083

if not debuglevel:

2426

initlogger(debug)

2084

initlogger()

2427

2085

else:

2428

2086

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

2429

initlogger(debug, level)

2087

initlogger(level)

2430

2088

2431

2089

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

2432

2090

syslogger.setFormatter(logging.Formatter

2433

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

2434

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

2435

.format(server_settings

2436

["servicename"])))

2091

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

2092

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

2093

% server_settings["servicename"]))

2437

2094

2438

2095

# Parse config file with clients

2439

client_config = configparser.SafeConfigParser(Client

2440

.client_defaults)

2096

client_config = configparser.SafeConfigParser(Client.client_defaults)

2441

2097

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

2442

2098

"clients.conf"))

2443

2099

2452

2108

use_ipv6=use_ipv6,

2453

2109

gnutls_priority=

2454

2110

server_settings["priority"],

2455

use_dbus=use_dbus,

2456

socketfd=(server_settings["socket"]

2457

or None))

2458

if not foreground:

2459

pidfilename = "/run/mandos.pid"

2460

pidfile = None

2111

use_dbus=use_dbus)

2112

if not debug:

2113

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

2461

2114

try:

2462

2115

pidfile = open(pidfilename, "w")

2463

except IOError as e:

2464

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

2465

exc_info=e)

2116

except IOError:

2117

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

2466

2118

2467

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

2119

try:

2120

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

2121

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

2122

except KeyError:

2468

2123

try:

2469

uid = pwd.getpwnam(name).pw_uid

2470

gid = pwd.getpwnam(name).pw_gid

2471

break

2124

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

2125

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

2472

2126

except KeyError:

2473

continue

2474

else:

2475

uid = 65534

2476

gid = 65534

2127

try:

2128

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

2129

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

2130

except KeyError:

2131

uid = 65534

2132

gid = 65534

2477

2133

try:

2478

2134

os.setgid(gid)

2479

2135

os.setuid(uid)

2480

2136

except OSError as error:

2481

if error.errno != errno.EPERM:

2137

if error[0] != errno.EPERM:

2482

2138

raise error

2483

2139

2484

2140

if debug:

2496

2152

.gnutls_global_set_log_function(debug_gnutls))

2497

2153

2498

2154

# Redirect stdin so all checkers get /dev/null

2499

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

2155

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

2500

2156

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

2501

2157

if null > 2:

2502

2158

os.close(null)

2159

else:

2160

# No console logging

2161

logger.removeHandler(console)

2503

2162

2504

2163

# Need to fork before connecting to D-Bus

2505

if not foreground:

2164

if not debug:

2506

2165

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

2507

2166

daemon()

2508

2167

2509

# multiprocessing will use threads, so before we use gobject we

2510

# need to inform gobject that threads will be used.

2511

2168

gobject.threads_init()

2512

2169

2513

2170

global main_loop

2514

2171

# From the Avahi example code

2515

DBusGMainLoop(set_as_default=True)

2172

DBusGMainLoop(set_as_default=True )

2516

2173

main_loop = gobject.MainLoop()

2517

2174

bus = dbus.SystemBus()

2518

2175

# End of Avahi example code

2524

2181

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

2525

2182

do_not_queue=True))

2526

2183

except dbus.exceptions.NameExistsException as e:

2527

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

2184

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

2528

2185

use_dbus = False

2529

2186

server_settings["use_dbus"] = False

2530

2187

tcp_server.use_dbus = False

2542

2199

2543

2200

client_class = Client

2544

2201

if use_dbus:

2545

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

2202

client_class = functools.partial(ClientDBusTransitional,

2203

bus = bus)

2546

2204

2547

2205

client_settings = Client.config_parser(client_config)

2548

2206

old_client_settings = {}

2549

2207

clients_data = {}

2550

2208

2551

# This is used to redirect stdout and stderr for checker processes

2552

global wnull

2553

wnull = open(os.devnull, "w") # A writable /dev/null

2554

# Only used if server is running in foreground but not in debug

2555

# mode

2556

if debug or not foreground:

2557

wnull.close()

2558

2559

2209

# Get client data and settings from last running state.

2560

2210

if server_settings["restore"]:

2561

2211

try:

2564

2214

(stored_state))

2565

2215

os.remove(stored_state_path)

2566

2216

except IOError as e:

2567

if e.errno == errno.ENOENT:

2568

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

2569

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

2570

else:

2571

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

2572

exc_info=e)

2217

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

2218

.format(e))

2219

if e.errno != errno.ENOENT:

2573

2220

raise

2574

except EOFError as e:

2575

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

2576

"EOFError:", exc_info=e)

2577

2221

2578

2222

with PGPEngine() as pgp:

2579

2223

for client_name, client in clients_data.iteritems():

2580

# Skip removed clients

2581

if client_name not in client_settings:

2582

continue

2583

2584

2224

# Decide which value to use after restoring saved state.

2585

2225

# We have three different values: Old config file,

2586

2226

# new config file, and saved state.

2600

2240

2601

2241

# Clients who has passed its expire date can still be

2602

2242

# enabled if its last checker was successful. Clients

2603

# whose checker succeeded before we stored its state is

2604

# assumed to have successfully run all checkers during

2605

# downtime.

2243

# whose checker failed before we stored its state is

2244

# assumed to have failed all checkers during downtime.

2606

2245

if client["enabled"]:

2607

2246

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

2608

2247

if not client["last_checked_ok"]:

2609

2248

logger.warning(

2610

2249

"disabling client {0} - Client never "

2611

"performed a successful checker"

2612

.format(client_name))

2250

"performed a successfull checker"

2251

.format(client["name"]))

2613

2252

client["enabled"] = False

2614

2253

elif client["last_checker_status"] != 0:

2615

2254

logger.warning(

2616

2255

"disabling client {0} - Client "

2617

2256

"last checker failed with error code {1}"

2618

.format(client_name,

2257

.format(client["name"],

2619

2258

client["last_checker_status"]))

2620

2259

client["enabled"] = False

2621

2260

else:

2622

2261

client["expires"] = (datetime.datetime

2623

2262

.utcnow()

2624

2263

+ client["timeout"])

2625

logger.debug("Last checker succeeded,"

2626

" keeping {0} enabled"

2627

.format(client_name))

2264

2628

2265

try:

2629

2266

client["secret"] = (

2630

2267

pgp.decrypt(client["encrypted_secret"],

2636

2273

.format(client_name))

2637

2274

client["secret"] = (

2638

2275

client_settings[client_name]["secret"])

2276

2639

2277

2640

2278

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

2641

for client_name in (set(old_client_settings)

2642

- set(client_settings)):

2279

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

2643

2280

del clients_data[client_name]

2644

for client_name in (set(client_settings)

2645

- set(old_client_settings)):

2281

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

2646

2282

clients_data[client_name] = client_settings[client_name]

2647

2648

# Create all client objects

2283

2284

# Create clients all clients

2649

2285

for client_name, client in clients_data.iteritems():

2650

2286

tcp_server.clients[client_name] = client_class(

2651

name = client_name, settings = client,

2652

server_settings = server_settings)

2287

name = client_name, settings = client)

2653

2288

2654

2289

if not tcp_server.clients:

2655

2290

logger.warning("No clients defined")

2656

2657

if not foreground:

2658

if pidfile is not None:

2659

try:

2660

with pidfile:

2661

pid = os.getpid()

2662

pidfile.write(str(pid) + "\n".encode("utf-8"))

2663

except IOError:

2664

logger.error("Could not write to file %r with PID %d",

2665

pidfilename, pid)

2666

del pidfile

2291

2292

if not debug:

2293

try:

2294

with pidfile:

2295

pid = os.getpid()

2296

pidfile.write(str(pid) + "\n".encode("utf-8"))

2297

del pidfile

2298

except IOError:

2299

logger.error("Could not write to file %r with PID %d",

2300

pidfilename, pid)

2301

except NameError:

2302

# "pidfile" was never created

2303

pass

2667

2304

del pidfilename

2305

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

2668

2306

2669

2307

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

2670

2308

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

2671

2309

2672

2310

if use_dbus:

2673

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

2674

"se.bsnet.fukt.Mandos"})

2675

class MandosDBusService(DBusObjectWithProperties):

2311

class MandosDBusService(dbus.service.Object):

2676

2312

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

2677

2313

def __init__(self):

2678

2314

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

2679

2315

_interface = "se.recompile.Mandos"

2680

2316

2681

@dbus_interface_annotations(_interface)

2682

def _foo(self):

2683

return { "org.freedesktop.DBus.Property"

2684

".EmitsChangedSignal":

2685

"false"}

2686

2687

2317

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

2688

2318

def ClientAdded(self, objpath):

2689

2319

"D-Bus signal"

2731

2361

2732

2362

del _interface

2733

2363

2734

mandos_dbus_service = MandosDBusService()

2364

class MandosDBusServiceTransitional(MandosDBusService):

2365

__metaclass__ = AlternateDBusNamesMetaclass

2366

mandos_dbus_service = MandosDBusServiceTransitional()

2735

2367

2736

2368

def cleanup():

2737

2369

"Cleanup function; run on exit"

2738

2370

service.cleanup()

2739

2371

2740

2372

multiprocessing.active_children()

2741

wnull.close()

2742

2373

if not (tcp_server.clients or client_settings):

2743

2374

return

2744

2375

2756

2387

# A list of attributes that can not be pickled

2757

2388

# + secret.

2758

2389

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

2759

"checker", "server_settings"))

2390

"checker"))

2760

2391

for name, typ in (inspect.getmembers

2761

2392

(dbus.service.Object)):

2762

2393

exclude.add(name)

2771

2402

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

2772

2403

2773

2404

try:

2774

with (tempfile.NamedTemporaryFile

2775

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

2776

dir=os.path.dirname(stored_state_path),

2777

delete=False)) as stored_state:

2405

with os.fdopen(os.open(stored_state_path,

2406

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

2407

0600), "wb") as stored_state:

2778

2408

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

2779

tempname=stored_state.name

2780

os.rename(tempname, stored_state_path)

2781

2409

except (IOError, OSError) as e:

2782

if not debug:

2783

try:

2784

os.remove(tempname)

2785

except NameError:

2786

pass

2787

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

2788

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

2789

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

2790

else:

2791

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

2792

exc_info=e)

2793

raise e

2410

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

2411

.format(e))

2412

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

2413

raise

2794

2414

2795

2415

# Delete all clients, and settings from config

2796

2416

while tcp_server.clients:

2823

2443

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

2824

2444

if use_ipv6:

2825

2445

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

2826

" flowinfo %d, scope_id %d",

2827

*tcp_server.socket.getsockname())

2446

" flowinfo %d, scope_id %d"

2447

% tcp_server.socket.getsockname())

2828

2448

else: # IPv4

2829

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

2830

*tcp_server.socket.getsockname())

2449

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

2450

% tcp_server.socket.getsockname())

2831

2451

2832

2452

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

2833

2453

2836

2456

try:

2837

2457

service.activate()

2838

2458

except dbus.exceptions.DBusException as error:

2839

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

2459

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

2840

2460

cleanup()

2841

2461

sys.exit(1)

2842

2462

# End of Avahi example code

2849

2469

logger.debug("Starting main loop")

2850

2470

main_loop.run()

2851

2471

except AvahiError as error:

2852

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

2472

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

2853

2473

cleanup()

2854

2474

sys.exit(1)

2855

2475

except KeyboardInterrupt: