/mandos/release : revision 237.7.196

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

37

39

import SocketServer as socketserver

38

40

import socket

39

41

import argparse

65

67

import types

66

68

import binascii

67

69

import tempfile

70

import itertools

71

import collections

68

72

69

73

import dbus

70

74

import dbus.service

75

79

import ctypes.util

76

80

import xml.dom.minidom

77

81

import inspect

78

import GnuPGInterface

79

82

80

83

try:

81

84

SO_BINDTODEVICE = socket.SO_BINDTODEVICE

85

88

except ImportError:

86

89

SO_BINDTODEVICE = None

87

90

88

version = "1.4.1"

91

version = "1.6.2"

89

92

stored_state_file = "clients.pickle"

90

93

91

94

logger = logging.getLogger()

136

139

class PGPEngine(object):

137

140

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

138

141

def __init__(self):

139

self.gnupg = GnuPGInterface.GnuPG()

140

142

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

141

self.gnupg = GnuPGInterface.GnuPG()

142

self.gnupg.options.meta_interactive = False

143

self.gnupg.options.homedir = self.tempdir

144

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

145

'--quiet',

146

'--no-use-agent'])

143

self.gnupgargs = ['--batch',

144

'--home', self.tempdir,

145

'--force-mdc',

146

'--quiet',

147

'--no-use-agent']

147

148

149

def __enter__(self):

149

150

return self

150

151

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

152

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

152

153

self._cleanup()

153

154

return False

154

155

171

172

def password_encode(self, password):

172

173

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

173

174

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

174

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

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

175

182

176

183

def encrypt(self, data, password):

177

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

178

with open(os.devnull) as devnull:

179

try:

180

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

181

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

182

attach_fhs={'stderr': devnull})

183

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

184

f.write(data)

185

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

186

ciphertext = f.read()

187

proc.wait()

188

except IOError as e:

189

raise PGPError(e)

190

self.gnupg.passphrase = None

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)

191

199

return ciphertext

192

200

193

201

def decrypt(self, data, password):

194

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

195

with open(os.devnull) as devnull:

196

try:

197

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

198

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

199

attach_fhs={'stderr': devnull})

200

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

201

f.write(data)

202

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

203

decrypted_plaintext = f.read()

204

proc.wait()

205

except IOError as e:

206

raise PGPError(e)

207

self.gnupg.passphrase = None

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)

208

218

return decrypted_plaintext

209

219

210

220

211

212

221

class AvahiError(Exception):

213

222

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

214

223

self.value = value

231

240

Used to optionally bind to the specified interface.

232

241

name: string; Example: 'Mandos'

233

242

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

234

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

243

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

235

244

port: integer; what port to announce

236

245

TXT: list of strings; TXT record for the service

237

246

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

243

252

server: D-Bus Server

244

253

bus: dbus.SystemBus()

245

254

"""

255

246

256

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

247

257

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

248

258

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

261

271

self.server = None

262

272

self.bus = bus

263

273

self.entry_group_state_changed_match = None

274

264

275

def rename(self):

265

276

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

266

277

if self.rename_count >= self.max_renames:

276

287

try:

277

288

self.add()

278

289

except dbus.exceptions.DBusException as error:

279

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

290

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

280

291

self.cleanup()

281

292

os._exit(1)

282

293

self.rename_count += 1

294

283

295

def remove(self):

284

296

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

285

297

if self.entry_group_state_changed_match is not None:

287

299

self.entry_group_state_changed_match = None

288

300

if self.group is not None:

289

301

self.group.Reset()

302

290

303

def add(self):

291

304

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

292

305

self.remove()

309

322

dbus.UInt16(self.port),

310

323

avahi.string_array_to_txt_array(self.TXT))

311

324

self.group.Commit()

325

312

326

def entry_group_state_changed(self, state, error):

313

327

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

314

328

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

321

335

elif state == avahi.ENTRY_GROUP_FAILURE:

322

336

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

323

337

unicode(error))

324

raise AvahiGroupError("State changed: %s"

325

% unicode(error))

338

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

339

.format(error))

340

326

341

def cleanup(self):

327

342

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

328

343

if self.group is not None:

333

348

pass

334

349

self.group = None

335

350

self.remove()

351

336

352

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

337

353

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

338

354

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

357

373

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

358

374

else:

359

375

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

376

360

377

def activate(self):

361

378

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

362

379

if self.server is None:

369

386

self.server_state_changed)

370

387

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

371

388

389

372

390

class AvahiServiceToSyslog(AvahiService):

373

391

def rename(self):

374

392

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

375

393

ret = AvahiService.rename(self)

376

394

syslogger.setFormatter(logging.Formatter

377

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

378

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

379

% self.name))

395

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

396

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

397

.format(self.name)))

380

398

return ret

381

399

400

382

401

def timedelta_to_milliseconds(td):

383

402

"Convert a datetime.timedelta() to milliseconds"

384

403

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

385

404

+ (td.seconds * 1000)

386

405

+ (td.microseconds // 1000))

387

406

407

388

408

class Client(object):

389

409

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

390

410

415

435

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

416

436

last_checker_status: integer between 0 and 255 reflecting exit

417

437

status of last checker. -1 reflects crashed

418

checker, or None.

438

checker, -2 means no checker completed yet.

419

439

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

420

440

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

421

441

D-Bus identifiers

422

442

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

423

443

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

424

444

until this client is disabled

425

extended_timeout: extra long timeout when password has been sent

445

extended_timeout: extra long timeout when secret has been sent

426

446

runtime_expansions: Allowed attributes for runtime expansion.

427

447

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

428

448

disabled, or None

449

server_settings: The server_settings dict from main()

429

450

"""

430

451

431

452

runtime_expansions = ("approval_delay", "approval_duration",

432

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

433

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

453

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

454

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

455

"last_approval_request", "last_checked_ok",

434

456

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

435

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

436

"extended_timeout": "15m",

437

"interval": "2m",

457

client_defaults = { "timeout": "PT5M",

458

"extended_timeout": "PT15M",

459

"interval": "PT2M",

438

460

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

439

461

"host": "",

440

"approval_delay": "0s",

441

"approval_duration": "1s",

462

"approval_delay": "PT0S",

463

"approval_duration": "PT1S",

442

464

"approved_by_default": "True",

443

465

"enabled": "True",

444

466

}

457

479

458

480

def approval_delay_milliseconds(self):

459

481

return timedelta_to_milliseconds(self.approval_delay)

460

482

461

483

@staticmethod

462

484

def config_parser(config):

463

485

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

488

510

"rb") as secfile:

489

511

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

490

512

else:

491

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

492

% section)

513

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

514

.format(section))

493

515

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

494

516

client["extended_timeout"] = string_to_delta(

495

517

section["extended_timeout"])

501

523

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

502

524

client["last_approval_request"] = None

503

525

client["last_checked_ok"] = None

504

client["last_checker_status"] = None

526

client["last_checker_status"] = -2

505

527

506

528

return settings

507

508

509

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

510

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

511

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

512

attribute."""

529

530

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

513

531

self.name = name

532

if server_settings is None:

533

server_settings = {}

534

self.server_settings = server_settings

514

535

# adding all client settings

515

536

for setting, value in settings.iteritems():

516

537

setattr(self, setting, value)

524

545

else:

525

546

self.last_enabled = None

526

547

self.expires = None

527

548

528

549

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

529

550

# Uppercase and remove spaces from fingerprint for later

530

551

# comparison purposes with return value from the fingerprint()

532

553

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

533

554

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

534

555

datetime.datetime.utcnow())

535

556

536

557

# attributes specific for this server instance

537

558

self.checker = None

538

559

self.checker_initiator_tag = None

566

587

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

567

588

# Already enabled

568

589

return

569

self.send_changedstate()

570

590

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

571

591

self.enabled = True

572

592

self.last_enabled = datetime.datetime.utcnow()

573

593

self.init_checker()

594

self.send_changedstate()

574

595

575

596

def disable(self, quiet=True):

576

597

"""Disable this client."""

577

598

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

578

599

return False

579

600

if not quiet:

580

self.send_changedstate()

581

if not quiet:

582

601

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

583

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

602

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

584

603

gobject.source_remove(self.disable_initiator_tag)

585

604

self.disable_initiator_tag = None

586

605

self.expires = None

587

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

606

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

588

607

gobject.source_remove(self.checker_initiator_tag)

589

608

self.checker_initiator_tag = None

590

609

self.stop_checker()

591

610

self.enabled = False

611

if not quiet:

612

self.send_changedstate()

592

613

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

593

614

return False

594

615

598

619

def init_checker(self):

599

620

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

600

621

# and every interval from then on.

622

if self.checker_initiator_tag is not None:

623

gobject.source_remove(self.checker_initiator_tag)

601

624

self.checker_initiator_tag = (gobject.timeout_add

602

625

(self.interval_milliseconds(),

603

626

self.start_checker))

604

627

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

628

if self.disable_initiator_tag is not None:

629

gobject.source_remove(self.disable_initiator_tag)

605

630

self.disable_initiator_tag = (gobject.timeout_add

606

631

(self.timeout_milliseconds(),

607

632

self.disable))

626

651

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

627

652

vars(self))

628

653

629

def checked_ok(self, timeout=None):

630

"""Bump up the timeout for this client.

631

632

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

633

alive and well.

634

"""

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."""

635

662

if timeout is None:

636

663

timeout = self.timeout

637

self.last_checked_ok = datetime.datetime.utcnow()

638

664

if self.disable_initiator_tag is not None:

639

665

gobject.source_remove(self.disable_initiator_tag)

666

self.disable_initiator_tag = None

640

667

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

641

668

self.disable_initiator_tag = (gobject.timeout_add

642

669

(timedelta_to_milliseconds

652

679

If a checker already exists, leave it running and do

653

680

nothing."""

654

681

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

655

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

656

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

657

# client would inevitably timeout, since no checker would get

658

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

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

659

686

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

660

687

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

661

688

# should be.

663

690

# If a checker exists, make sure it is not a zombie

664

691

try:

665

692

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

666

except (AttributeError, OSError) as error:

667

if (isinstance(error, OSError)

668

and error.errno != errno.ECHILD):

669

raise error

693

except AttributeError:

694

pass

695

except OSError as error:

696

if error.errno != errno.ECHILD:

697

raise

670

698

else:

671

699

if pid:

672

700

logger.warning("Checker was a zombie")

675

703

self.current_checker_command)

676

704

# Start a new checker if needed

677

705

if self.checker is None:

706

# Escape attributes for the shell

707

escaped_attrs = dict(

708

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

709

for attr in

710

self.runtime_expansions)

678

711

try:

679

# In case checker_command has exactly one % operator

680

command = self.checker_command % self.host

681

except TypeError:

682

# Escape attributes for the shell

683

escaped_attrs = dict(

684

(attr,

685

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

686

errors=

687

'replace')))

688

for attr in

689

self.runtime_expansions)

690

691

try:

692

command = self.checker_command % escaped_attrs

693

except TypeError as error:

694

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

695

' %s', self.checker_command, error)

696

return True # Try again later

712

command = self.checker_command % escaped_attrs

713

except TypeError as error:

714

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

715

self.checker_command, exc_info=error)

716

return True # Try again later

697

717

self.current_checker_command = command

698

718

try:

699

719

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

702

722

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

703

723

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

704

724

# always replaced by /dev/null.)

725

# The exception is when not debugging but nevertheless

726

# running in the foreground; use the previously

727

# created wnull.

728

popen_args = {}

729

if (not self.server_settings["debug"]

730

and self.server_settings["foreground"]):

731

popen_args.update({"stdout": wnull,

732

"stderr": wnull })

705

733

self.checker = subprocess.Popen(command,

706

734

close_fds=True,

707

shell=True, cwd="/")

708

self.checker_callback_tag = (gobject.child_watch_add

709

(self.checker.pid,

710

self.checker_callback,

711

data=command))

712

# The checker may have completed before the gobject

713

# watch was added. Check for this.

735

shell=True, cwd="/",

736

**popen_args)

737

except OSError as error:

738

logger.error("Failed to start subprocess",

739

exc_info=error)

740

return True

741

self.checker_callback_tag = (gobject.child_watch_add

742

(self.checker.pid,

743

self.checker_callback,

744

data=command))

745

# The checker may have completed before the gobject

746

# watch was added. Check for this.

747

try:

714

748

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

715

if pid:

716

gobject.source_remove(self.checker_callback_tag)

717

self.checker_callback(pid, status, command)

718

749

except OSError as error:

719

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

720

error)

750

if error.errno == errno.ECHILD:

751

# This should never happen

752

logger.error("Child process vanished",

753

exc_info=error)

754

return True

755

raise

756

if pid:

757

gobject.source_remove(self.checker_callback_tag)

758

self.checker_callback(pid, status, command)

721

759

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

722

760

return True

723

761

730

768

return

731

769

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

732

770

try:

733

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

771

self.checker.terminate()

734

772

#time.sleep(0.5)

735

773

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

736

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

774

# self.checker.kill()

737

775

except OSError as error:

738

776

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

739

777

raise

756

794

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

757

795

if byte_arrays and signature != "ay":

758

796

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

759

" signature %r" % signature)

797

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

760

798

def decorator(func):

761

799

func._dbus_is_property = True

762

800

func._dbus_interface = dbus_interface

770

808

return decorator

771

809

772

810

811

def dbus_interface_annotations(dbus_interface):

812

"""Decorator for marking functions returning interface annotations

813

814

Usage:

815

816

@dbus_interface_annotations("org.example.Interface")

817

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

818

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

819

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

820

"false"}

821

"""

822

def decorator(func):

823

func._dbus_is_interface = True

824

func._dbus_interface = dbus_interface

825

func._dbus_name = dbus_interface

826

return func

827

return decorator

828

829

830

def dbus_annotations(annotations):

831

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

832

Usage:

833

834

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

835

access="r")

836

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

837

"org.freedesktop.DBus.Property."

838

"EmitsChangedSignal": "false"})

839

def Property_dbus_property(self):

840

return dbus.Boolean(False)

841

"""

842

def decorator(func):

843

func._dbus_annotations = annotations

844

return func

845

return decorator

846

847

773

848

class DBusPropertyException(dbus.exceptions.DBusException):

774

849

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

775

850

"""

798

873

"""

799

874

800

875

@staticmethod

801

def _is_dbus_property(obj):

802

return getattr(obj, "_dbus_is_property", False)

876

def _is_dbus_thing(thing):

877

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

878

879

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

880

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

881

"""

882

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

883

False)

803

884

804

def _get_all_dbus_properties(self):

885

def _get_all_dbus_things(self, thing):

805

886

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

806

887

"""

807

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

888

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

889

name),

890

athing.__get__(self))

808

891

for cls in self.__class__.__mro__

809

for name, prop in

810

inspect.getmembers(cls, self._is_dbus_property))

892

for name, athing in

893

inspect.getmembers(cls,

894

self._is_dbus_thing(thing)))

811

895

812

896

def _get_dbus_property(self, interface_name, property_name):

813

897

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

815

899

"""

816

900

for cls in self.__class__.__mro__:

817

901

for name, value in (inspect.getmembers

818

(cls, self._is_dbus_property)):

902

(cls,

903

self._is_dbus_thing("property"))):

819

904

if (value._dbus_name == property_name

820

905

and value._dbus_interface == interface_name):

821

906

return value.__get__(self)

850

935

# signatures other than "ay".

851

936

if prop._dbus_signature != "ay":

852

937

raise ValueError

853

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

854

for byte in value))

938

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

939

for byte in value))

855

940

prop(value)

856

941

857

942

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

863

948

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

864

949

"""

865

950

properties = {}

866

for name, prop in self._get_all_dbus_properties():

951

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

867

952

if (interface_name

868

953

and interface_name != prop._dbus_interface):

869

954

# Interface non-empty but did not match

884

969

path_keyword='object_path',

885

970

connection_keyword='connection')

886

971

def Introspect(self, object_path, connection):

887

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

972

"""Overloading of standard D-Bus method.

973

974

Inserts property tags and interface annotation tags.

888

975

"""

889

976

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

890

977

connection)

897

984

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

898

985

return e

899

986

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

987

# Add property tags

900

988

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

901

989

for name, prop

902

in self._get_all_dbus_properties()

990

in self._get_all_dbus_things("property")

903

991

if prop._dbus_interface

904

992

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

905

993

if_tag.appendChild(tag)

994

# Add annotation tags

995

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

996

for tag in if_tag.getElementsByTagName(typ):

997

annots = dict()

998

for name, prop in (self.

999

_get_all_dbus_things(typ)):

1000

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

1001

and prop._dbus_interface

1002

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

1003

annots.update(getattr

1004

(prop,

1005

"_dbus_annotations",

1006

{}))

1007

for name, value in annots.iteritems():

1008

ann_tag = document.createElement(

1009

"annotation")

1010

ann_tag.setAttribute("name", name)

1011

ann_tag.setAttribute("value", value)

1012

tag.appendChild(ann_tag)

1013

# Add interface annotation tags

1014

for annotation, value in dict(

1015

itertools.chain.from_iterable(

1016

annotations().iteritems()

1017

for name, annotations in

1018

self._get_all_dbus_things("interface")

1019

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

1020

)).iteritems():

1021

ann_tag = document.createElement("annotation")

1022

ann_tag.setAttribute("name", annotation)

1023

ann_tag.setAttribute("value", value)

1024

if_tag.appendChild(ann_tag)

906

1025

# Add the names to the return values for the

907

1026

# "org.freedesktop.DBus.Properties" methods

908

1027

if (if_tag.getAttribute("name")

923

1042

except (AttributeError, xml.dom.DOMException,

924

1043

xml.parsers.expat.ExpatError) as error:

925

1044

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

926

error)

1045

exc_info=error)

927

1046

return xmlstring

928

1047

929

1048

930

def datetime_to_dbus (dt, variant_level=0):

1049

def datetime_to_dbus(dt, variant_level=0):

931

1050

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

932

1051

if dt is None:

933

1052

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

935

1054

variant_level=variant_level)

936

1055

937

1056

938

class AlternateDBusNamesMetaclass(DBusObjectWithProperties

939

.__metaclass__):

940

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

941

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

1057

def alternate_dbus_interfaces(alt_interface_names, deprecate=True):

1058

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

1059

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

1060

interface names according to the "alt_interface_names" mapping.

1061

Usage:

1062

1063

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

1064

"net.example.AlternateInterface"})

1065

class SampleDBusObject(dbus.service.Object):

1066

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

1067

def SampleDBusMethod():

1068

pass

1069

1070

The above "SampleDBusMethod" on "SampleDBusObject" will be

1071

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

1072

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

1073

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

1074

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

1075

1076

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

1077

(from DBusObjectWithProperties) and interfaces (from the

1078

dbus_interface_annotations decorator).

942

1079

"""

943

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

944

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

945

# methods, signals, or properties in them

946

for base in (b for b in bases

947

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

948

# Go though all attributes of the base class

949

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

1080

def wrapper(cls):

1081

for orig_interface_name, alt_interface_name in (

1082

alt_interface_names.iteritems()):

1083

attr = {}

1084

interface_names = set()

1085

# Go though all attributes of the class

1086

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

950

1087

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

951

1088

# with the wrong interface name

952

1089

if (not hasattr(attribute, "_dbus_interface")

953

1090

or not attribute._dbus_interface

954

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

1091

.startswith(orig_interface_name)):

955

1092

continue

956

1093

# Create an alternate D-Bus interface name based on

957

1094

# the current name

958

1095

alt_interface = (attribute._dbus_interface

959

.replace("se.recompile.Mandos",

960

"se.bsnet.fukt.Mandos"))

1096

.replace(orig_interface_name,

1097

alt_interface_name))

1098

interface_names.add(alt_interface)

961

1099

# Is this a D-Bus signal?

962

1100

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

963

# Extract the original non-method function by

964

# black magic

1101

# Extract the original non-method undecorated

1102

# function by black magic

965

1103

nonmethod_func = (dict(

966

1104

zip(attribute.func_code.co_freevars,

967

1105

attribute.__closure__))["func"]

978

1116

nonmethod_func.func_name,

979

1117

nonmethod_func.func_defaults,

980

1118

nonmethod_func.func_closure)))

1119

# Copy annotations, if any

1120

try:

1121

new_function._dbus_annotations = (

1122

dict(attribute._dbus_annotations))

1123

except AttributeError:

1124

pass

981

1125

# Define a creator of a function to call both the

982

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

983

# signals gets sent when the function is called

1126

# original and alternate functions, so both the

1127

# original and alternate signals gets sent when

1128

# the function is called

984

1129

def fixscope(func1, func2):

985

1130

"""This function is a scope container to pass

986

1131

func1 and func2 to the "call_both" function

993

1138

return call_both

994

1139

# Create the "call_both" function and add it to

995

1140

# the class

996

attr[attrname] = fixscope(attribute,

997

new_function)

1141

attr[attrname] = fixscope(attribute, new_function)

998

1142

# Is this a D-Bus method?

999

1143

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

1000

1144

# Create a new, but exactly alike, function

1011

1155

attribute.func_name,

1012

1156

attribute.func_defaults,

1013

1157

attribute.func_closure)))

1158

# Copy annotations, if any

1159

try:

1160

attr[attrname]._dbus_annotations = (

1161

dict(attribute._dbus_annotations))

1162

except AttributeError:

1163

pass

1014

1164

# Is this a D-Bus property?

1015

1165

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

1016

1166

# Create a new, but exactly alike, function

1030

1180

attribute.func_name,

1031

1181

attribute.func_defaults,

1032

1182

attribute.func_closure)))

1033

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

1034

1035

1183

# Copy annotations, if any

1184

try:

1185

attr[attrname]._dbus_annotations = (

1186

dict(attribute._dbus_annotations))

1187

except AttributeError:

1188

pass

1189

# Is this a D-Bus interface?

1190

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

1191

# Create a new, but exactly alike, function

1192

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

1193

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

1194

# to the class.

1195

attr[attrname] = (dbus_interface_annotations

1196

(alt_interface)

1197

(types.FunctionType

1198

(attribute.func_code,

1199

attribute.func_globals,

1200

attribute.func_name,

1201

attribute.func_defaults,

1202

attribute.func_closure)))

1203

if deprecate:

1204

# Deprecate all alternate interfaces

1205

iname="_AlternateDBusNames_interface_annotation{0}"

1206

for interface_name in interface_names:

1207

@dbus_interface_annotations(interface_name)

1208

def func(self):

1209

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

1210

"true" }

1211

# Find an unused name

1212

for aname in (iname.format(i)

1213

for i in itertools.count()):

1214

if aname not in attr:

1215

attr[aname] = func

1216

break

1217

if interface_names:

1218

# Replace the class with a new subclass of it with

1219

# methods, signals, etc. as created above.

1220

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

1221

(cls,), attr)

1222

return cls

1223

return wrapper

1224

1225

1226

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

1227

"se.bsnet.fukt.Mandos"})

1036

1228

class ClientDBus(Client, DBusObjectWithProperties):

1037

1229

"""A Client class using D-Bus

1038

1230

1049

1241

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

1050

1242

self.bus = bus

1051

1243

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

1052

self._approvals_pending = 0

1053

1054

self._approvals_pending = 0

1055

1244

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

1056

1245

# the D-Bus

1057

1246

client_object_name = unicode(self.name).translate(

1061

1250

("/clients/" + client_object_name))

1062

1251

DBusObjectWithProperties.__init__(self, self.bus,

1063

1252

self.dbus_object_path)

1064

1253

1065

1254

def notifychangeproperty(transform_func,

1066

1255

dbus_name, type_func=lambda x: x,

1067

1256

variant_level=1):

1090

1279

1091

1280

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

1092

1281

1093

1094

1282

expires = notifychangeproperty(datetime_to_dbus, "Expires")

1095

1283

approvals_pending = notifychangeproperty(dbus.Boolean,

1096

1284

"ApprovalPending",

1103

1291

checker is not None)

1104

1292

last_checked_ok = notifychangeproperty(datetime_to_dbus,

1105

1293

"LastCheckedOK")

1294

last_checker_status = notifychangeproperty(dbus.Int16,

1295

"LastCheckerStatus")

1106

1296

last_approval_request = notifychangeproperty(

1107

1297

datetime_to_dbus, "LastApprovalRequest")

1108

1298

approved_by_default = notifychangeproperty(dbus.Boolean,

1176

1366

return False

1177

1367

1178

1368

def approve(self, value=True):

1179

self.send_changedstate()

1180

1369

self.approved = value

1181

1370

gobject.timeout_add(timedelta_to_milliseconds

1182

1371

(self.approval_duration),

1183

1372

self._reset_approved)

1184

1373

self.send_changedstate()

1185

1374

1186

1375

## D-Bus methods, signals & properties

1187

1376

_interface = "se.recompile.Mandos.Client"

1188

1377

1378

## Interfaces

1379

1380

@dbus_interface_annotations(_interface)

1381

def _foo(self):

1382

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

1383

"false"}

1384

1189

1385

## Signals

1190

1386

1191

1387

# CheckerCompleted - signal

1227

1423

"D-Bus signal"

1228

1424

return self.need_approval()

1229

1425

1230

# NeRwequest - signal

1231

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

1232

def NewRequest(self, ip):

1233

"""D-Bus signal

1234

Is sent after a client request a password.

1235

"""

1236

pass

1237

1238

1426

## Methods

1239

1427

1240

1428

# Approve - method

1350

1538

return

1351

1539

return datetime_to_dbus(self.last_checked_ok)

1352

1540

1541

# LastCheckerStatus - property

1542

@dbus_service_property(_interface, signature="n",

1543

access="read")

1544

def LastCheckerStatus_dbus_property(self):

1545

return dbus.Int16(self.last_checker_status)

1546

1353

1547

# Expires - property

1354

1548

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

1355

1549

def Expires_dbus_property(self):

1366

1560

def Timeout_dbus_property(self, value=None):

1367

1561

if value is None: # get

1368

1562

return dbus.UInt64(self.timeout_milliseconds())

1563

old_timeout = self.timeout

1369

1564

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

1370

# Reschedule timeout

1565

# Reschedule disabling

1371

1566

if self.enabled:

1372

1567

now = datetime.datetime.utcnow()

1373

time_to_die = timedelta_to_milliseconds(

1374

(self.last_checked_ok + self.timeout) - now)

1375

if time_to_die <= 0:

1568

self.expires += self.timeout - old_timeout

1569

if self.expires <= now:

1376

1570

# The timeout has passed

1377

1571

self.disable()

1378

1572

else:

1379

self.expires = (now +

1380

datetime.timedelta(milliseconds =

1381

time_to_die))

1382

1573

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

1383

1574

is None):

1384

1575

return

1385

1576

gobject.source_remove(self.disable_initiator_tag)

1386

self.disable_initiator_tag = (gobject.timeout_add

1387

(time_to_die,

1388

self.disable))

1577

self.disable_initiator_tag = (

1578

gobject.timeout_add(

1579

timedelta_to_milliseconds(self.expires - now),

1580

self.disable))

1389

1581

1390

1582

# ExtendedTimeout - property

1391

1583

@dbus_service_property(_interface, signature="t",

1470

1662

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

1471

1663

1472

1664

1473

class ClientDBusTransitional(ClientDBus):

1474

__metaclass__ = AlternateDBusNamesMetaclass

1475

1476

1477

1665

class ClientHandler(socketserver.BaseRequestHandler, object):

1478

1666

"""A class to handle client connections.

1479

1667

1515

1703

logger.debug("Protocol version: %r", line)

1516

1704

try:

1517

1705

if int(line.strip().split()[0]) > 1:

1518

raise RuntimeError

1706

raise RuntimeError(line)

1519

1707

except (ValueError, IndexError, RuntimeError) as error:

1520

1708

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

1521

1709

return

1547

1735

except KeyError:

1548

1736

return

1549

1737

1550

if self.server.use_dbus:

1551

# Emit D-Bus signal

1552

client.NewRequest(str(self.client_address))

1553

1554

1738

if client.approval_delay:

1555

1739

delay = client.approval_delay

1556

1740

client.approvals_pending += 1

1587

1771

#wait until timeout or approved

1588

1772

time = datetime.datetime.now()

1589

1773

client.changedstate.acquire()

1590

(client.changedstate.wait

1591

(float(client.timedelta_to_milliseconds(delay)

1592

/ 1000)))

1774

client.changedstate.wait(

1775

float(timedelta_to_milliseconds(delay)

1776

/ 1000))

1593

1777

client.changedstate.release()

1594

1778

time2 = datetime.datetime.now()

1595

1779

if (time2 - time) >= delay:

1611

1795

try:

1612

1796

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

1613

1797

except gnutls.errors.GNUTLSError as error:

1614

logger.warning("gnutls send failed")

1798

logger.warning("gnutls send failed",

1799

exc_info=error)

1615

1800

return

1616

1801

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

1617

1802

sent, len(client.secret)

1620

1805

1621

1806

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

1622

1807

# bump the timeout using extended_timeout

1623

client.checked_ok(client.extended_timeout)

1808

client.bump_timeout(client.extended_timeout)

1624

1809

if self.server.use_dbus:

1625

1810

# Emit D-Bus signal

1626

1811

client.GotSecret()

1631

1816

try:

1632

1817

session.bye()

1633

1818

except gnutls.errors.GNUTLSError as error:

1634

logger.warning("GnuTLS bye failed")

1819

logger.warning("GnuTLS bye failed",

1820

exc_info=error)

1635

1821

1636

1822

@staticmethod

1637

1823

def peer_certificate(session):

1709

1895

def process_request(self, request, address):

1710

1896

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

1711

1897

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

1712

args = (request,

1713

address))

1898

args = (request, address))

1714

1899

proc.start()

1715

1900

return proc

1716

1901

1731

1916

1732

1917

def add_pipe(self, parent_pipe, proc):

1733

1918

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

1734

raise NotImplementedError

1919

raise NotImplementedError()

1735

1920

1736

1921

1737

1922

class IPv6_TCPServer(MultiprocessingMixInWithPipe,

1744

1929

use_ipv6: Boolean; to use IPv6 or not

1745

1930

"""

1746

1931

def __init__(self, server_address, RequestHandlerClass,

1747

interface=None, use_ipv6=True):

1932

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

1933

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

1934

creating a new one with socket.socket().

1935

"""

1748

1936

self.interface = interface

1749

1937

if use_ipv6:

1750

1938

self.address_family = socket.AF_INET6

1939

if socketfd is not None:

1940

# Save the file descriptor

1941

self.socketfd = socketfd

1942

# Save the original socket.socket() function

1943

self.socket_socket = socket.socket

1944

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

1945

#

1946

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

1947

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

1948

# patching socket.socket.)

1949

#

1950

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

1951

@functools.wraps(socket.socket)

1952

def socket_wrapper(*args, **kwargs):

1953

# Restore original function so subsequent calls are

1954

# not affected.

1955

socket.socket = self.socket_socket

1956

del self.socket_socket

1957

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

1958

# saved file descriptor.

1959

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

1960

# Replace socket.socket() function with wrapper

1961

socket.socket = socket_wrapper

1962

# The socketserver.TCPServer.__init__ will call

1963

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

1964

# socket_wrapper(), if socketfd was set.

1751

1965

socketserver.TCPServer.__init__(self, server_address,

1752

1966

RequestHandlerClass)

1967

1753

1968

def server_bind(self):

1754

1969

"""This overrides the normal server_bind() function

1755

1970

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

1763

1978

try:

1764

1979

self.socket.setsockopt(socket.SOL_SOCKET,

1765

1980

SO_BINDTODEVICE,

1766

str(self.interface

1767

+ '\0'))

1981

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

1768

1982

except socket.error as error:

1769

if error[0] == errno.EPERM:

1770

logger.error("No permission to"

1771

" bind to interface %s",

1772

self.interface)

1773

elif error[0] == errno.ENOPROTOOPT:

1983

if error.errno == errno.EPERM:

1984

logger.error("No permission to bind to"

1985

" interface %s", self.interface)

1986

elif error.errno == errno.ENOPROTOOPT:

1774

1987

logger.error("SO_BINDTODEVICE not available;"

1775

1988

" cannot bind to interface %s",

1776

1989

self.interface)

1990

elif error.errno == errno.ENODEV:

1991

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

1992

" cannot bind", self.interface)

1777

1993

else:

1778

1994

raise

1779

1995

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

1782

1998

if self.address_family == socket.AF_INET6:

1783

1999

any_address = "::" # in6addr_any

1784

2000

else:

1785

any_address = socket.INADDR_ANY

2001

any_address = "0.0.0.0" # INADDR_ANY

1786

2002

self.server_address = (any_address,

1787

2003

self.server_address[1])

1788

2004

elif not self.server_address[1]:

1809

2025

"""

1810

2026

def __init__(self, server_address, RequestHandlerClass,

1811

2027

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

1812

gnutls_priority=None, use_dbus=True):

2028

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

1813

2029

self.enabled = False

1814

2030

self.clients = clients

1815

2031

if self.clients is None:

1819

2035

IPv6_TCPServer.__init__(self, server_address,

1820

2036

RequestHandlerClass,

1821

2037

interface = interface,

1822

use_ipv6 = use_ipv6)

2038

use_ipv6 = use_ipv6,

2039

socketfd = socketfd)

1823

2040

def server_activate(self):

1824

2041

if self.enabled:

1825

2042

return socketserver.TCPServer.server_activate(self)

1838

2055

1839

2056

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

1840

2057

proc = None, client_object=None):

1841

condition_names = {

1842

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

1843

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

1844

# blocking).

1845

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

1846

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

1847

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

1848

# broken, usually for pipes and

1849

# sockets).

1850

}

1851

conditions_string = ' | '.join(name

1852

for cond, name in

1853

condition_names.iteritems()

1854

if cond & condition)

1855

2058

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

1856

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

2059

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

1857

2060

# Wait for other process to exit

1858

2061

proc.join()

1859

2062

return False

1917

2120

return True

1918

2121

1919

2122

2123

def rfc3339_duration_to_delta(duration):

2124

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

2125

2126

>>> rfc3339_duration_to_delta("P7D")

2127

datetime.timedelta(7)

2128

>>> rfc3339_duration_to_delta("PT60S")

2129

datetime.timedelta(0, 60)

2130

>>> rfc3339_duration_to_delta("PT60M")

2131

datetime.timedelta(0, 3600)

2132

>>> rfc3339_duration_to_delta("PT24H")

2133

datetime.timedelta(1)

2134

>>> rfc3339_duration_to_delta("P1W")

2135

datetime.timedelta(7)

2136

>>> rfc3339_duration_to_delta("PT5M30S")

2137

datetime.timedelta(0, 330)

2138

>>> rfc3339_duration_to_delta("P1DT3M20S")

2139

datetime.timedelta(1, 200)

2140

"""

2141

2142

# Parsing an RFC 3339 duration with regular expressions is not

2143

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

2144

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

2145

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

2146

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

2147

# avoid excessive use of external libraries.

2148

2149

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

2150

Token = collections.namedtuple("Token",

2151

("regexp", # To match token; if

2152

# "value" is not None,

2153

# must have a "group"

2154

# containing digits

2155

"value", # datetime.timedelta or

2156

# None

2157

"followers")) # Tokens valid after

2158

# this token

2159

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

2160

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

2161

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

2162

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

2163

datetime.timedelta(seconds=1),

2164

frozenset((token_end,)))

2165

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

2166

datetime.timedelta(minutes=1),

2167

frozenset((token_second, token_end)))

2168

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

2169

datetime.timedelta(hours=1),

2170

frozenset((token_minute, token_end)))

2171

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

2172

None,

2173

frozenset((token_hour, token_minute,

2174

token_second)))

2175

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

2176

datetime.timedelta(days=1),

2177

frozenset((token_time, token_end)))

2178

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

2179

datetime.timedelta(weeks=4),

2180

frozenset((token_day, token_end)))

2181

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

2182

datetime.timedelta(weeks=52),

2183

frozenset((token_month, token_end)))

2184

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

2185

datetime.timedelta(weeks=1),

2186

frozenset((token_end,)))

2187

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

2188

frozenset((token_year, token_month,

2189

token_day, token_time,

2190

token_week))),

2191

# Define starting values

2192

value = datetime.timedelta() # Value so far

2193

found_token = None

2194

followers = frozenset(token_duration,) # Following valid tokens

2195

s = duration # String left to parse

2196

# Loop until end token is found

2197

while found_token is not token_end:

2198

# Search for any currently valid tokens

2199

for token in followers:

2200

match = token.regexp.match(s)

2201

if match is not None:

2202

# Token found

2203

if token.value is not None:

2204

# Value found, parse digits

2205

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

2206

# Add to value so far

2207

value += factor * token.value

2208

# Strip token from string

2209

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

2210

# Go to found token

2211

found_token = token

2212

# Set valid next tokens

2213

followers = found_token.followers

2214

break

2215

else:

2216

# No currently valid tokens were found

2217

raise ValueError("Invalid RFC 3339 duration")

2218

# End token found

2219

return value

2220

2221

1920

2222

def string_to_delta(interval):

1921

2223

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

1922

2224

1933

2235

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

1934

2236

datetime.timedelta(0, 330)

1935

2237

"""

2238

2239

try:

2240

return rfc3339_duration_to_delta(interval)

2241

except ValueError:

2242

pass

2243

1936

2244

timevalue = datetime.timedelta(0)

1937

2245

for s in interval.split():

1938

2246

try:

1949

2257

elif suffix == "w":

1950

2258

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

1951

2259

else:

1952

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

1953

except (ValueError, IndexError) as e:

2260

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

2261

.format(suffix))

2262

except IndexError as e:

1954

2263

raise ValueError(*(e.args))

1955

2264

timevalue += delta

1956

2265

return timevalue

1969

2278

sys.exit()

1970

2279

if not noclose:

1971

2280

# Close all standard open file descriptors

1972

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

2281

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

1973

2282

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

1974

2283

raise OSError(errno.ENODEV,

1975

"%s not a character device"

1976

% os.path.devnull)

2284

"{0} not a character device"

2285

.format(os.devnull))

1977

2286

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

1978

2287

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

1979

2288

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

1988

2297

1989

2298

parser = argparse.ArgumentParser()

1990

2299

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

1991

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

2300

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

1992

2301

help="show version number and exit")

1993

2302

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

1994

2303

help="Bind to interface IF")

2000

2309

help="Run self-test")

2001

2310

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

2002

2311

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

2003

" to terminal")

2312

" to terminal", default=None)

2004

2313

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

2005

2314

help="Debug level for stdout output")

2006

2315

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

2013

2322

" files")

2014

2323

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

2015

2324

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

2016

" system bus interface")

2325

" system bus interface", default=None)

2017

2326

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

2018

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

2327

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

2328

default=None)

2019

2329

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

2020

2330

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

2021

" state")

2331

" state", default=None)

2332

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

2333

help="Specify a file descriptor to a network"

2334

" socket to use instead of creating one")

2022

2335

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

2023

2336

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

2337

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

2338

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

2024

2339

2025

2340

options = parser.parse_args()

2026

2341

2035

2350

"port": "",

2036

2351

"debug": "False",

2037

2352

"priority":

2038

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

2353

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

2039

2354

"servicename": "Mandos",

2040

2355

"use_dbus": "True",

2041

2356

"use_ipv6": "True",

2042

2357

"debuglevel": "",

2043

2358

"restore": "True",

2044

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

2359

"socket": "",

2360

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

2361

"foreground": "False",

2045

2362

}

2046

2363

2047

2364

# Parse config file for server-global settings

2052

2369

# Convert the SafeConfigParser object to a dict

2053

2370

server_settings = server_config.defaults()

2054

2371

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

2055

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

2372

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

2056

2373

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

2057

2374

option)

2058

2375

if server_settings["port"]:

2059

2376

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

2060

2377

"port")

2378

if server_settings["socket"]:

2379

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

2380

"socket")

2381

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

2382

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

2383

# happen with a supplied network socket.

2384

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

2385

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

2386

["socket"])

2061

2387

del server_config

2062

2388

2063

2389

# Override the settings from the config file with command line

2065

2391

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

2066

2392

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

2067

2393

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

2068

"statedir"):

2394

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

2069

2395

value = getattr(options, option)

2070

2396

if value is not None:

2071

2397

server_settings[option] = value

2074

2400

for option in server_settings.keys():

2075

2401

if type(server_settings[option]) is str:

2076

2402

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

2403

# Force all boolean options to be boolean

2404

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

2405

"foreground"):

2406

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

2407

# Debug implies foreground

2408

if server_settings["debug"]:

2409

server_settings["foreground"] = True

2077

2410

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

2078

2411

2079

2412

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

2085

2418

use_ipv6 = server_settings["use_ipv6"]

2086

2419

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

2087

2420

stored_state_file)

2421

foreground = server_settings["foreground"]

2088

2422

2089

2423

if debug:

2090

2424

initlogger(debug, logging.DEBUG)

2097

2431

2098

2432

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

2099

2433

syslogger.setFormatter(logging.Formatter

2100

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

2101

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

2102

% server_settings["servicename"]))

2434

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

2435

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

2436

.format(server_settings

2437

["servicename"])))

2103

2438

2104

2439

# Parse config file with clients

2105

2440

client_config = configparser.SafeConfigParser(Client

2118

2453

use_ipv6=use_ipv6,

2119

2454

gnutls_priority=

2120

2455

server_settings["priority"],

2121

use_dbus=use_dbus)

2122

if not debug:

2123

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

2456

use_dbus=use_dbus,

2457

socketfd=(server_settings["socket"]

2458

or None))

2459

if not foreground:

2460

pidfilename = "/run/mandos.pid"

2461

if not os.path.isdir("/run/."):

2462

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

2463

pidfile = None

2124

2464

try:

2125

2465

pidfile = open(pidfilename, "w")

2126

except IOError:

2127

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

2466

except IOError as e:

2467

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

2468

exc_info=e)

2128

2469

2129

try:

2130

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

2131

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

2132

except KeyError:

2470

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

2133

2471

try:

2134

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

2135

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

2472

uid = pwd.getpwnam(name).pw_uid

2473

gid = pwd.getpwnam(name).pw_gid

2474

break

2136

2475

except KeyError:

2137

try:

2138

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

2139

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

2140

except KeyError:

2141

uid = 65534

2142

gid = 65534

2476

continue

2477

else:

2478

uid = 65534

2479

gid = 65534

2143

2480

try:

2144

2481

os.setgid(gid)

2145

2482

os.setuid(uid)

2146

2483

except OSError as error:

2147

if error[0] != errno.EPERM:

2148

raise error

2484

if error.errno != errno.EPERM:

2485

raise

2149

2486

2150

2487

if debug:

2151

2488

# Enable all possible GnuTLS debugging

2162

2499

.gnutls_global_set_log_function(debug_gnutls))

2163

2500

2164

2501

# Redirect stdin so all checkers get /dev/null

2165

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

2502

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

2166

2503

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

2167

2504

if null > 2:

2168

2505

os.close(null)

2169

2506

2170

2507

# Need to fork before connecting to D-Bus

2171

if not debug:

2508

if not foreground:

2172

2509

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

2173

2510

daemon()

2174

2511

2512

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

2513

# need to inform gobject that threads will be used.

2175

2514

gobject.threads_init()

2176

2515

2177

2516

global main_loop

2178

2517

# From the Avahi example code

2179

DBusGMainLoop(set_as_default=True )

2518

DBusGMainLoop(set_as_default=True)

2180

2519

main_loop = gobject.MainLoop()

2181

2520

bus = dbus.SystemBus()

2182

2521

# End of Avahi example code

2188

2527

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

2189

2528

do_not_queue=True))

2190

2529

except dbus.exceptions.NameExistsException as e:

2191

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

2530

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

2192

2531

use_dbus = False

2193

2532

server_settings["use_dbus"] = False

2194

2533

tcp_server.use_dbus = False

2206

2545

2207

2546

client_class = Client

2208

2547

if use_dbus:

2209

client_class = functools.partial(ClientDBusTransitional,

2210

bus = bus)

2548

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

2211

2549

2212

2550

client_settings = Client.config_parser(client_config)

2213

2551

old_client_settings = {}

2214

2552

clients_data = {}

2215

2553

2554

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

2555

global wnull

2556

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

2557

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

2558

# mode

2559

if debug or not foreground:

2560

wnull.close()

2561

2216

2562

# Get client data and settings from last running state.

2217

2563

if server_settings["restore"]:

2218

2564

try:

2221

2567

(stored_state))

2222

2568

os.remove(stored_state_path)

2223

2569

except IOError as e:

2224

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

2225

.format(e))

2226

if e.errno != errno.ENOENT:

2570

if e.errno == errno.ENOENT:

2571

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

2572

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

2573

else:

2574

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

2575

exc_info=e)

2227

2576

raise

2228

2577

except EOFError as e:

2229

2578

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

2230

"EOFError: {0}".format(e))

2579

"EOFError:", exc_info=e)

2231

2580

2232

2581

with PGPEngine() as pgp:

2233

2582

for client_name, client in clients_data.iteritems():

2583

# Skip removed clients

2584

if client_name not in client_settings:

2585

continue

2586

2234

2587

# Decide which value to use after restoring saved state.

2235

2588

# We have three different values: Old config file,

2236

2589

# new config file, and saved state.

2250

2603

2251

2604

# Clients who has passed its expire date can still be

2252

2605

# enabled if its last checker was successful. Clients

2253

# whose checker failed before we stored its state is

2254

# assumed to have failed all checkers during downtime.

2606

# whose checker succeeded before we stored its state is

2607

# assumed to have successfully run all checkers during

2608

# downtime.

2255

2609

if client["enabled"]:

2256

2610

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

2257

2611

if not client["last_checked_ok"]:

2258

2612

logger.warning(

2259

2613

"disabling client {0} - Client never "

2260

"performed a successfull checker"

2261

.format(client["name"]))

2614

"performed a successful checker"

2615

.format(client_name))

2262

2616

client["enabled"] = False

2263

2617

elif client["last_checker_status"] != 0:

2264

2618

logger.warning(

2265

2619

"disabling client {0} - Client "

2266

2620

"last checker failed with error code {1}"

2267

.format(client["name"],

2621

.format(client_name,

2268

2622

client["last_checker_status"]))

2269

2623

client["enabled"] = False

2270

2624

else:

2273

2627

+ client["timeout"])

2274

2628

logger.debug("Last checker succeeded,"

2275

2629

" keeping {0} enabled"

2276

.format(client["name"]))

2630

.format(client_name))

2277

2631

try:

2278

2632

client["secret"] = (

2279

2633

pgp.decrypt(client["encrypted_secret"],

2285

2639

.format(client_name))

2286

2640

client["secret"] = (

2287

2641

client_settings[client_name]["secret"])

2288

2289

2642

2290

2643

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

2291

2644

for client_name in (set(old_client_settings)

2294

2647

for client_name in (set(client_settings)

2295

2648

- set(old_client_settings)):

2296

2649

clients_data[client_name] = client_settings[client_name]

2297

2298

# Create clients all clients

2650

2651

# Create all client objects

2299

2652

for client_name, client in clients_data.iteritems():

2300

2653

tcp_server.clients[client_name] = client_class(

2301

name = client_name, settings = client)

2654

name = client_name, settings = client,

2655

server_settings = server_settings)

2302

2656

2303

2657

if not tcp_server.clients:

2304

2658

logger.warning("No clients defined")

2305

2306

if not debug:

2307

try:

2308

with pidfile:

2309

pid = os.getpid()

2310

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

2311

del pidfile

2312

except IOError:

2313

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

2314

pidfilename, pid)

2315

except NameError:

2316

# "pidfile" was never created

2317

pass

2659

2660

if not foreground:

2661

if pidfile is not None:

2662

try:

2663

with pidfile:

2664

pid = os.getpid()

2665

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

2666

except IOError:

2667

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

2668

pidfilename, pid)

2669

del pidfile

2318

2670

del pidfilename

2319

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

2320

2671

2321

2672

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

2322

2673

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

2323

2674

2324

2675

if use_dbus:

2325

class MandosDBusService(dbus.service.Object):

2676

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

2677

"se.bsnet.fukt.Mandos"})

2678

class MandosDBusService(DBusObjectWithProperties):

2326

2679

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

2327

2680

def __init__(self):

2328

2681

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

2329

2682

_interface = "se.recompile.Mandos"

2330

2683

2684

@dbus_interface_annotations(_interface)

2685

def _foo(self):

2686

return { "org.freedesktop.DBus.Property"

2687

".EmitsChangedSignal":

2688

"false"}

2689

2331

2690

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

2332

2691

def ClientAdded(self, objpath):

2333

2692

"D-Bus signal"

2375

2734

2376

2735

del _interface

2377

2736

2378

class MandosDBusServiceTransitional(MandosDBusService):

2379

__metaclass__ = AlternateDBusNamesMetaclass

2380

mandos_dbus_service = MandosDBusServiceTransitional()

2737

mandos_dbus_service = MandosDBusService()

2381

2738

2382

2739

def cleanup():

2383

2740

"Cleanup function; run on exit"

2384

2741

service.cleanup()

2385

2742

2386

2743

multiprocessing.active_children()

2744

wnull.close()

2387

2745

if not (tcp_server.clients or client_settings):

2388

2746

return

2389

2747

2401

2759

# A list of attributes that can not be pickled

2402

2760

# + secret.

2403

2761

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

2404

"checker"))

2762

"checker", "server_settings"))

2405

2763

for name, typ in (inspect.getmembers

2406

2764

(dbus.service.Object)):

2407

2765

exclude.add(name)

2416

2774

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

2417

2775

2418

2776

try:

2419

tempfd, tempname = tempfile.mkstemp(suffix=".pickle",

2420

prefix="clients-",

2421

dir=os.path.dirname

2422

(stored_state_path))

2423

with os.fdopen(tempfd, "wb") as stored_state:

2777

with (tempfile.NamedTemporaryFile

2778

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

2779

dir=os.path.dirname(stored_state_path),

2780

delete=False)) as stored_state:

2424

2781

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

2782

tempname=stored_state.name

2425

2783

os.rename(tempname, stored_state_path)

2426

2784

except (IOError, OSError) as e:

2427

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

2428

.format(e))

2429

2785

if not debug:

2430

2786

try:

2431

2787

os.remove(tempname)

2432

2788

except NameError:

2433

2789

pass

2434

if e.errno not in set((errno.ENOENT, errno.EACCES,

2435

errno.EEXIST)):

2436

raise e

2790

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

2791

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

2792

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

2793

else:

2794

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

2795

exc_info=e)

2796

raise

2437

2797

2438

2798

# Delete all clients, and settings from config

2439

2799

while tcp_server.clients:

2466

2826

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

2467

2827

if use_ipv6:

2468

2828

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

2469

" flowinfo %d, scope_id %d"

2470

% tcp_server.socket.getsockname())

2829

" flowinfo %d, scope_id %d",

2830

*tcp_server.socket.getsockname())

2471

2831

else: # IPv4

2472

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

2473

% tcp_server.socket.getsockname())

2832

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

2833

*tcp_server.socket.getsockname())

2474

2834

2475

2835

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

2476

2836

2479

2839

try:

2480

2840

service.activate()

2481

2841

except dbus.exceptions.DBusException as error:

2482

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

2842

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

2483

2843

cleanup()

2484

2844

sys.exit(1)

2485

2845

# End of Avahi example code

2492

2852

logger.debug("Starting main loop")

2493

2853

main_loop.run()

2494

2854

except AvahiError as error:

2495

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

2855

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

2496

2856

cleanup()

2497

2857

sys.exit(1)

2498

2858

except KeyboardInterrupt: