/mandos/release : revision 237.7.174

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 = "1.6.1"

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

174

175

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

175

176

177

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

178

passphrase = self.password_encode(password)

179

with tempfile.NamedTemporaryFile(dir=self.tempdir

180

) as passfile:

181

passfile.write(passphrase)

182

passfile.flush()

183

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

184

'--passphrase-file',

185

passfile.name]

186

+ self.gnupgargs,

187

stdin = subprocess.PIPE,

188

stdout = subprocess.PIPE,

189

stderr = subprocess.PIPE)

190

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

191

if proc.returncode != 0:

192

raise PGPError(err)

191

193

return ciphertext

192

194

193

195

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

196

passphrase = self.password_encode(password)

197

with tempfile.NamedTemporaryFile(dir = self.tempdir

198

) as passfile:

199

passfile.write(passphrase)

200

passfile.flush()

201

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

202

'--passphrase-file',

203

passfile.name]

204

+ self.gnupgargs,

205

stdin = subprocess.PIPE,

206

stdout = subprocess.PIPE,

207

stderr = subprocess.PIPE)

208

decrypted_plaintext, err = proc.communicate(input

209

= data)

210

if proc.returncode != 0:

211

raise PGPError(err)

208

212

return decrypted_plaintext

209

213

210

214

211

212

215

class AvahiError(Exception):

213

216

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

214

217

self.value = value

231

234

Used to optionally bind to the specified interface.

232

235

name: string; Example: 'Mandos'

233

236

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

234

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

237

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

235

238

port: integer; what port to announce

236

239

TXT: list of strings; TXT record for the service

237

240

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

243

246

server: D-Bus Server

244

247

bus: dbus.SystemBus()

245

248

"""

249

246

250

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

247

251

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

248

252

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

261

265

self.server = None

262

266

self.bus = bus

263

267

self.entry_group_state_changed_match = None

268

264

269

def rename(self):

265

270

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

266

271

if self.rename_count >= self.max_renames:

276

281

try:

277

282

self.add()

278

283

except dbus.exceptions.DBusException as error:

279

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

284

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

280

285

self.cleanup()

281

286

os._exit(1)

282

287

self.rename_count += 1

288

283

289

def remove(self):

284

290

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

285

291

if self.entry_group_state_changed_match is not None:

287

293

self.entry_group_state_changed_match = None

288

294

if self.group is not None:

289

295

self.group.Reset()

296

290

297

def add(self):

291

298

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

292

299

self.remove()

309

316

dbus.UInt16(self.port),

310

317

avahi.string_array_to_txt_array(self.TXT))

311

318

self.group.Commit()

319

312

320

def entry_group_state_changed(self, state, error):

313

321

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

314

322

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

321

329

elif state == avahi.ENTRY_GROUP_FAILURE:

322

330

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

323

331

unicode(error))

324

raise AvahiGroupError("State changed: %s"

325

% unicode(error))

332

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

333

.format(error))

334

326

335

def cleanup(self):

327

336

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

328

337

if self.group is not None:

333

342

pass

334

343

self.group = None

335

344

self.remove()

345

336

346

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

337

347

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

338

348

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

357

367

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

358

368

else:

359

369

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

370

360

371

def activate(self):

361

372

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

362

373

if self.server is None:

369

380

self.server_state_changed)

370

381

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

371

382

383

372

384

class AvahiServiceToSyslog(AvahiService):

373

385

def rename(self):

374

386

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

375

387

ret = AvahiService.rename(self)

376

388

syslogger.setFormatter(logging.Formatter

377

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

378

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

379

% self.name))

389

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

390

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

391

.format(self.name)))

380

392

return ret

381

393

394

382

395

def timedelta_to_milliseconds(td):

383

396

"Convert a datetime.timedelta() to milliseconds"

384

397

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

385

398

+ (td.seconds * 1000)

386

399

+ (td.microseconds // 1000))

387

400

401

388

402

class Client(object):

389

403

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

390

404

415

429

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

416

430

last_checker_status: integer between 0 and 255 reflecting exit

417

431

status of last checker. -1 reflects crashed

418

checker, or None.

432

checker, -2 means no checker completed yet.

419

433

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

420

434

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

421

435

D-Bus identifiers

422

436

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

423

437

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

424

438

until this client is disabled

425

extended_timeout: extra long timeout when password has been sent

439

extended_timeout: extra long timeout when secret has been sent

426

440

runtime_expansions: Allowed attributes for runtime expansion.

427

441

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

428

442

disabled, or None

443

server_settings: The server_settings dict from main()

429

444

"""

430

445

431

446

runtime_expansions = ("approval_delay", "approval_duration",

432

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

433

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

447

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

448

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

449

"last_approval_request", "last_checked_ok",

434

450

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

435

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

436

"extended_timeout": "15m",

437

"interval": "2m",

451

client_defaults = { "timeout": "PT5M",

452

"extended_timeout": "PT15M",

453

"interval": "PT2M",

438

454

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

439

455

"host": "",

440

"approval_delay": "0s",

441

"approval_duration": "1s",

456

"approval_delay": "PT0S",

457

"approval_duration": "PT1S",

442

458

"approved_by_default": "True",

443

459

"enabled": "True",

444

460

}

457

473

458

474

def approval_delay_milliseconds(self):

459

475

return timedelta_to_milliseconds(self.approval_delay)

460

476

461

477

@staticmethod

462

478

def config_parser(config):

463

479

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

475

491

# Reformat values from string types to Python types

476

492

client["approved_by_default"] = config.getboolean(

477

493

client_name, "approved_by_default")

478

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

494

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

495

"enabled")

479

496

480

497

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

481

498

.replace(" ", ""))

487

504

"rb") as secfile:

488

505

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

489

506

else:

490

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

491

% section)

507

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

508

.format(section))

492

509

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

493

510

client["extended_timeout"] = string_to_delta(

494

511

section["extended_timeout"])

500

517

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

501

518

client["last_approval_request"] = None

502

519

client["last_checked_ok"] = None

503

client["last_checker_status"] = None

520

client["last_checker_status"] = -2

504

521

505

522

return settings

506

507

508

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

509

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

510

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

511

attribute."""

523

524

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

512

525

self.name = name

526

if server_settings is None:

527

server_settings = {}

528

self.server_settings = server_settings

513

529

# adding all client settings

514

530

for setting, value in settings.iteritems():

515

531

setattr(self, setting, value)

523

539

else:

524

540

self.last_enabled = None

525

541

self.expires = None

526

542

527

543

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

528

544

# Uppercase and remove spaces from fingerprint for later

529

545

# comparison purposes with return value from the fingerprint()

530

546

# function

531

547

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

532

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

533

548

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

549

datetime.datetime.utcnow())

550

534

551

# attributes specific for this server instance

535

552

self.checker = None

536

553

self.checker_initiator_tag = None

564

581

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

565

582

# Already enabled

566

583

return

567

self.send_changedstate()

568

584

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

569

585

self.enabled = True

570

586

self.last_enabled = datetime.datetime.utcnow()

571

587

self.init_checker()

588

self.send_changedstate()

572

589

573

590

def disable(self, quiet=True):

574

591

"""Disable this client."""

575

592

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

576

593

return False

577

594

if not quiet:

578

self.send_changedstate()

579

if not quiet:

580

595

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

581

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

596

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

582

597

gobject.source_remove(self.disable_initiator_tag)

583

598

self.disable_initiator_tag = None

584

599

self.expires = None

585

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

600

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

586

601

gobject.source_remove(self.checker_initiator_tag)

587

602

self.checker_initiator_tag = None

588

603

self.stop_checker()

589

604

self.enabled = False

605

if not quiet:

606

self.send_changedstate()

590

607

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

591

608

return False

592

609

596

613

def init_checker(self):

597

614

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

598

615

# and every interval from then on.

616

if self.checker_initiator_tag is not None:

617

gobject.source_remove(self.checker_initiator_tag)

599

618

self.checker_initiator_tag = (gobject.timeout_add

600

619

(self.interval_milliseconds(),

601

620

self.start_checker))

602

621

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

622

if self.disable_initiator_tag is not None:

623

gobject.source_remove(self.disable_initiator_tag)

603

624

self.disable_initiator_tag = (gobject.timeout_add

604

625

(self.timeout_milliseconds(),

605

626

self.disable))

624

645

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

625

646

vars(self))

626

647

627

def checked_ok(self, timeout=None):

628

"""Bump up the timeout for this client.

629

630

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

631

alive and well.

632

"""

648

def checked_ok(self):

649

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

650

self.last_checked_ok = datetime.datetime.utcnow()

651

self.last_checker_status = 0

652

self.bump_timeout()

653

654

def bump_timeout(self, timeout=None):

655

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

633

656

if timeout is None:

634

657

timeout = self.timeout

635

self.last_checked_ok = datetime.datetime.utcnow()

636

658

if self.disable_initiator_tag is not None:

637

659

gobject.source_remove(self.disable_initiator_tag)

660

self.disable_initiator_tag = None

638

661

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

639

662

self.disable_initiator_tag = (gobject.timeout_add

640

663

(timedelta_to_milliseconds

650

673

If a checker already exists, leave it running and do

651

674

nothing."""

652

675

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

653

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

654

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

655

# client would inevitably timeout, since no checker would get

656

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

676

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

677

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

678

# would inevitably timeout, since no checker would get a

679

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

657

680

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

658

681

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

659

682

# should be.

673

696

self.current_checker_command)

674

697

# Start a new checker if needed

675

698

if self.checker is None:

699

# Escape attributes for the shell

700

escaped_attrs = dict(

701

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

702

for attr in

703

self.runtime_expansions)

676

704

try:

677

# In case checker_command has exactly one % operator

678

command = self.checker_command % self.host

679

except TypeError:

680

# Escape attributes for the shell

681

escaped_attrs = dict(

682

(attr,

683

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

684

errors=

685

'replace')))

686

for attr in

687

self.runtime_expansions)

688

689

try:

690

command = self.checker_command % escaped_attrs

691

except TypeError as error:

692

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

693

' %s', self.checker_command, error)

694

return True # Try again later

705

command = self.checker_command % escaped_attrs

706

except TypeError as error:

707

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

708

self.checker_command, exc_info=error)

709

return True # Try again later

695

710

self.current_checker_command = command

696

711

try:

697

712

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

700

715

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

701

716

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

702

717

# always replaced by /dev/null.)

718

# The exception is when not debugging but nevertheless

719

# running in the foreground; use the previously

720

# created wnull.

721

popen_args = {}

722

if (not self.server_settings["debug"]

723

and self.server_settings["foreground"]):

724

popen_args.update({"stdout": wnull,

725

"stderr": wnull })

703

726

self.checker = subprocess.Popen(command,

704

727

close_fds=True,

705

shell=True, cwd="/")

706

self.checker_callback_tag = (gobject.child_watch_add

707

(self.checker.pid,

708

self.checker_callback,

709

data=command))

710

# The checker may have completed before the gobject

711

# watch was added. Check for this.

728

shell=True, cwd="/",

729

**popen_args)

730

except OSError as error:

731

logger.error("Failed to start subprocess",

732

exc_info=error)

733

return True

734

self.checker_callback_tag = (gobject.child_watch_add

735

(self.checker.pid,

736

self.checker_callback,

737

data=command))

738

# The checker may have completed before the gobject

739

# watch was added. Check for this.

740

try:

712

741

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

713

if pid:

714

gobject.source_remove(self.checker_callback_tag)

715

self.checker_callback(pid, status, command)

716

742

except OSError as error:

717

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

718

error)

743

if error.errno == errno.ECHILD:

744

# This should never happen

745

logger.error("Child process vanished",

746

exc_info=error)

747

return True

748

raise

749

if pid:

750

gobject.source_remove(self.checker_callback_tag)

751

self.checker_callback(pid, status, command)

719

752

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

720

753

return True

721

754

728

761

return

729

762

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

730

763

try:

731

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

764

self.checker.terminate()

732

765

#time.sleep(0.5)

733

766

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

734

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

767

# self.checker.kill()

735

768

except OSError as error:

736

769

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

737

770

raise

754

787

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

755

788

if byte_arrays and signature != "ay":

756

789

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

757

" signature %r" % signature)

790

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

758

791

def decorator(func):

759

792

func._dbus_is_property = True

760

793

func._dbus_interface = dbus_interface

768

801

return decorator

769

802

770

803

804

def dbus_interface_annotations(dbus_interface):

805

"""Decorator for marking functions returning interface annotations

806

807

Usage:

808

809

@dbus_interface_annotations("org.example.Interface")

810

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

811

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

812

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

813

"false"}

814

"""

815

def decorator(func):

816

func._dbus_is_interface = True

817

func._dbus_interface = dbus_interface

818

func._dbus_name = dbus_interface

819

return func

820

return decorator

821

822

823

def dbus_annotations(annotations):

824

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

825

Usage:

826

827

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

828

access="r")

829

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

830

"org.freedesktop.DBus.Property."

831

"EmitsChangedSignal": "false"})

832

def Property_dbus_property(self):

833

return dbus.Boolean(False)

834

"""

835

def decorator(func):

836

func._dbus_annotations = annotations

837

return func

838

return decorator

839

840

771

841

class DBusPropertyException(dbus.exceptions.DBusException):

772

842

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

773

843

"""

796

866

"""

797

867

798

868

@staticmethod

799

def _is_dbus_property(obj):

800

return getattr(obj, "_dbus_is_property", False)

869

def _is_dbus_thing(thing):

870

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

871

872

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

873

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

874

"""

875

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

876

False)

801

877

802

def _get_all_dbus_properties(self):

878

def _get_all_dbus_things(self, thing):

803

879

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

804

880

"""

805

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

881

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

882

name),

883

athing.__get__(self))

806

884

for cls in self.__class__.__mro__

807

for name, prop in

808

inspect.getmembers(cls, self._is_dbus_property))

885

for name, athing in

886

inspect.getmembers(cls,

887

self._is_dbus_thing(thing)))

809

888

810

889

def _get_dbus_property(self, interface_name, property_name):

811

890

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

813

892

"""

814

893

for cls in self.__class__.__mro__:

815

894

for name, value in (inspect.getmembers

816

(cls, self._is_dbus_property)):

895

(cls,

896

self._is_dbus_thing("property"))):

817

897

if (value._dbus_name == property_name

818

898

and value._dbus_interface == interface_name):

819

899

return value.__get__(self)

848

928

# signatures other than "ay".

849

929

if prop._dbus_signature != "ay":

850

930

raise ValueError

851

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

852

for byte in value))

931

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

932

for byte in value))

853

933

prop(value)

854

934

855

935

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

861

941

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

862

942

"""

863

943

properties = {}

864

for name, prop in self._get_all_dbus_properties():

944

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

865

945

if (interface_name

866

946

and interface_name != prop._dbus_interface):

867

947

# Interface non-empty but did not match

882

962

path_keyword='object_path',

883

963

connection_keyword='connection')

884

964

def Introspect(self, object_path, connection):

885

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

965

"""Overloading of standard D-Bus method.

966

967

Inserts property tags and interface annotation tags.

886

968

"""

887

969

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

888

970

connection)

895

977

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

896

978

return e

897

979

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

980

# Add property tags

898

981

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

899

982

for name, prop

900

in self._get_all_dbus_properties()

983

in self._get_all_dbus_things("property")

901

984

if prop._dbus_interface

902

985

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

903

986

if_tag.appendChild(tag)

987

# Add annotation tags

988

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

989

for tag in if_tag.getElementsByTagName(typ):

990

annots = dict()

991

for name, prop in (self.

992

_get_all_dbus_things(typ)):

993

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

994

and prop._dbus_interface

995

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

996

annots.update(getattr

997

(prop,

998

"_dbus_annotations",

999

{}))

1000

for name, value in annots.iteritems():

1001

ann_tag = document.createElement(

1002

"annotation")

1003

ann_tag.setAttribute("name", name)

1004

ann_tag.setAttribute("value", value)

1005

tag.appendChild(ann_tag)

1006

# Add interface annotation tags

1007

for annotation, value in dict(

1008

itertools.chain.from_iterable(

1009

annotations().iteritems()

1010

for name, annotations in

1011

self._get_all_dbus_things("interface")

1012

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

1013

)).iteritems():

1014

ann_tag = document.createElement("annotation")

1015

ann_tag.setAttribute("name", annotation)

1016

ann_tag.setAttribute("value", value)

1017

if_tag.appendChild(ann_tag)

904

1018

# Add the names to the return values for the

905

1019

# "org.freedesktop.DBus.Properties" methods

906

1020

if (if_tag.getAttribute("name")

921

1035

except (AttributeError, xml.dom.DOMException,

922

1036

xml.parsers.expat.ExpatError) as error:

923

1037

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

924

error)

1038

exc_info=error)

925

1039

return xmlstring

926

1040

927

1041

928

def datetime_to_dbus (dt, variant_level=0):

1042

def datetime_to_dbus(dt, variant_level=0):

929

1043

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

930

1044

if dt is None:

931

1045

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

933

1047

variant_level=variant_level)

934

1048

935

1049

936

class AlternateDBusNamesMetaclass(DBusObjectWithProperties

937

.__metaclass__):

938

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

939

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

1050

def alternate_dbus_interfaces(alt_interface_names, deprecate=True):

1051

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

1052

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

1053

interface names according to the "alt_interface_names" mapping.

1054

Usage:

1055

1056

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

1057

"net.example.AlternateInterface"})

1058

class SampleDBusObject(dbus.service.Object):

1059

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

1060

def SampleDBusMethod():

1061

pass

1062

1063

The above "SampleDBusMethod" on "SampleDBusObject" will be

1064

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

1065

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

1066

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

1067

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

1068

1069

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

1070

(from DBusObjectWithProperties) and interfaces (from the

1071

dbus_interface_annotations decorator).

940

1072

"""

941

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

942

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

943

# methods, signals, or properties in them

944

for base in (b for b in bases

945

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

946

# Go though all attributes of the base class

947

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

1073

def wrapper(cls):

1074

for orig_interface_name, alt_interface_name in (

1075

alt_interface_names.iteritems()):

1076

attr = {}

1077

interface_names = set()

1078

# Go though all attributes of the class

1079

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

948

1080

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

949

1081

# with the wrong interface name

950

1082

if (not hasattr(attribute, "_dbus_interface")

951

1083

or not attribute._dbus_interface

952

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

1084

.startswith(orig_interface_name)):

953

1085

continue

954

1086

# Create an alternate D-Bus interface name based on

955

1087

# the current name

956

1088

alt_interface = (attribute._dbus_interface

957

.replace("se.recompile.Mandos",

958

"se.bsnet.fukt.Mandos"))

1089

.replace(orig_interface_name,

1090

alt_interface_name))

1091

interface_names.add(alt_interface)

959

1092

# Is this a D-Bus signal?

960

1093

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

961

# Extract the original non-method function by

962

# black magic

1094

# Extract the original non-method undecorated

1095

# function by black magic

963

1096

nonmethod_func = (dict(

964

1097

zip(attribute.func_code.co_freevars,

965

1098

attribute.__closure__))["func"]

976

1109

nonmethod_func.func_name,

977

1110

nonmethod_func.func_defaults,

978

1111

nonmethod_func.func_closure)))

1112

# Copy annotations, if any

1113

try:

1114

new_function._dbus_annotations = (

1115

dict(attribute._dbus_annotations))

1116

except AttributeError:

1117

pass

979

1118

# Define a creator of a function to call both the

980

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

981

# signals gets sent when the function is called

1119

# original and alternate functions, so both the

1120

# original and alternate signals gets sent when

1121

# the function is called

982

1122

def fixscope(func1, func2):

983

1123

"""This function is a scope container to pass

984

1124

func1 and func2 to the "call_both" function

991

1131

return call_both

992

1132

# Create the "call_both" function and add it to

993

1133

# the class

994

attr[attrname] = fixscope(attribute,

995

new_function)

1134

attr[attrname] = fixscope(attribute, new_function)

996

1135

# Is this a D-Bus method?

997

1136

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

998

1137

# Create a new, but exactly alike, function

1009

1148

attribute.func_name,

1010

1149

attribute.func_defaults,

1011

1150

attribute.func_closure)))

1151

# Copy annotations, if any

1152

try:

1153

attr[attrname]._dbus_annotations = (

1154

dict(attribute._dbus_annotations))

1155

except AttributeError:

1156

pass

1012

1157

# Is this a D-Bus property?

1013

1158

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

1014

1159

# Create a new, but exactly alike, function

1028

1173

attribute.func_name,

1029

1174

attribute.func_defaults,

1030

1175

attribute.func_closure)))

1031

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

1032

1033

1176

# Copy annotations, if any

1177

try:

1178

attr[attrname]._dbus_annotations = (

1179

dict(attribute._dbus_annotations))

1180

except AttributeError:

1181

pass

1182

# Is this a D-Bus interface?

1183

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

1184

# Create a new, but exactly alike, function

1185

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

1186

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

1187

# to the class.

1188

attr[attrname] = (dbus_interface_annotations

1189

(alt_interface)

1190

(types.FunctionType

1191

(attribute.func_code,

1192

attribute.func_globals,

1193

attribute.func_name,

1194

attribute.func_defaults,

1195

attribute.func_closure)))

1196

if deprecate:

1197

# Deprecate all alternate interfaces

1198

iname="_AlternateDBusNames_interface_annotation{0}"

1199

for interface_name in interface_names:

1200

@dbus_interface_annotations(interface_name)

1201

def func(self):

1202

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

1203

"true" }

1204

# Find an unused name

1205

for aname in (iname.format(i)

1206

for i in itertools.count()):

1207

if aname not in attr:

1208

attr[aname] = func

1209

break

1210

if interface_names:

1211

# Replace the class with a new subclass of it with

1212

# methods, signals, etc. as created above.

1213

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

1214

(cls,), attr)

1215

return cls

1216

return wrapper

1217

1218

1219

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

1220

"se.bsnet.fukt.Mandos"})

1034

1221

class ClientDBus(Client, DBusObjectWithProperties):

1035

1222

"""A Client class using D-Bus

1036

1223

1047

1234

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

1048

1235

self.bus = bus

1049

1236

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

1050

self._approvals_pending = 0

1051

1052

self._approvals_pending = 0

1053

1237

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

1054

1238

# the D-Bus

1055

1239

client_object_name = unicode(self.name).translate(

1059

1243

("/clients/" + client_object_name))

1060

1244

DBusObjectWithProperties.__init__(self, self.bus,

1061

1245

self.dbus_object_path)

1062

1246

1063

1247

def notifychangeproperty(transform_func,

1064

1248

dbus_name, type_func=lambda x: x,

1065

1249

variant_level=1):

1088

1272

1089

1273

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

1090

1274

1091

1092

1275

expires = notifychangeproperty(datetime_to_dbus, "Expires")

1093

1276

approvals_pending = notifychangeproperty(dbus.Boolean,

1094

1277

"ApprovalPending",

1101

1284

checker is not None)

1102

1285

last_checked_ok = notifychangeproperty(datetime_to_dbus,

1103

1286

"LastCheckedOK")

1287

last_checker_status = notifychangeproperty(dbus.Int16,

1288

"LastCheckerStatus")

1104

1289

last_approval_request = notifychangeproperty(

1105

1290

datetime_to_dbus, "LastApprovalRequest")

1106

1291

approved_by_default = notifychangeproperty(dbus.Boolean,

1174

1359

return False

1175

1360

1176

1361

def approve(self, value=True):

1177

self.send_changedstate()

1178

1362

self.approved = value

1179

1363

gobject.timeout_add(timedelta_to_milliseconds

1180

1364

(self.approval_duration),

1181

1365

self._reset_approved)

1182

1366

self.send_changedstate()

1183

1367

1184

1368

## D-Bus methods, signals & properties

1185

1369

_interface = "se.recompile.Mandos.Client"

1186

1370

1371

## Interfaces

1372

1373

@dbus_interface_annotations(_interface)

1374

def _foo(self):

1375

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

1376

"false"}

1377

1187

1378

## Signals

1188

1379

1189

1380

# CheckerCompleted - signal

1225

1416

"D-Bus signal"

1226

1417

return self.need_approval()

1227

1418

1228

# NeRwequest - signal

1229

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

1230

def NewRequest(self, ip):

1231

"""D-Bus signal

1232

Is sent after a client request a password.

1233

"""

1234

pass

1235

1236

1419

## Methods

1237

1420

1238

1421

# Approve - method

1348

1531

return

1349

1532

return datetime_to_dbus(self.last_checked_ok)

1350

1533

1534

# LastCheckerStatus - property

1535

@dbus_service_property(_interface, signature="n",

1536

access="read")

1537

def LastCheckerStatus_dbus_property(self):

1538

return dbus.Int16(self.last_checker_status)

1539

1351

1540

# Expires - property

1352

1541

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

1353

1542

def Expires_dbus_property(self):

1364

1553

def Timeout_dbus_property(self, value=None):

1365

1554

if value is None: # get

1366

1555

return dbus.UInt64(self.timeout_milliseconds())

1556

old_timeout = self.timeout

1367

1557

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

1368

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

1369

return

1370

# Reschedule timeout

1371

gobject.source_remove(self.disable_initiator_tag)

1372

self.disable_initiator_tag = None

1373

self.expires = None

1374

time_to_die = timedelta_to_milliseconds((self

1375

.last_checked_ok

1376

+ self.timeout)

1377

- datetime.datetime

1378

.utcnow())

1379

if time_to_die <= 0:

1380

# The timeout has passed

1381

self.disable()

1382

else:

1383

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

1384

+ datetime.timedelta(milliseconds =

1385

time_to_die))

1386

self.disable_initiator_tag = (gobject.timeout_add

1387

(time_to_die, self.disable))

1558

# Reschedule disabling

1559

if self.enabled:

1560

now = datetime.datetime.utcnow()

1561

self.expires += self.timeout - old_timeout

1562

if self.expires <= now:

1563

# The timeout has passed

1564

self.disable()

1565

else:

1566

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

1567

is None):

1568

return

1569

gobject.source_remove(self.disable_initiator_tag)

1570

self.disable_initiator_tag = (

1571

gobject.timeout_add(

1572

timedelta_to_milliseconds(self.expires - now),

1573

self.disable))

1388

1574

1389

1575

# ExtendedTimeout - property

1390

1576

@dbus_service_property(_interface, signature="t",

1469

1655

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

1470

1656

1471

1657

1472

class ClientDBusTransitional(ClientDBus):

1473

__metaclass__ = AlternateDBusNamesMetaclass

1474

1475

1476

1658

class ClientHandler(socketserver.BaseRequestHandler, object):

1477

1659

"""A class to handle client connections.

1478

1660

1546

1728

except KeyError:

1547

1729

return

1548

1730

1549

if self.server.use_dbus:

1550

# Emit D-Bus signal

1551

client.NewRequest(str(self.client_address))

1552

1553

1731

if client.approval_delay:

1554

1732

delay = client.approval_delay

1555

1733

client.approvals_pending += 1

1586

1764

#wait until timeout or approved

1587

1765

time = datetime.datetime.now()

1588

1766

client.changedstate.acquire()

1589

(client.changedstate.wait

1590

(float(client.timedelta_to_milliseconds(delay)

1591

/ 1000)))

1767

client.changedstate.wait(

1768

float(timedelta_to_milliseconds(delay)

1769

/ 1000))

1592

1770

client.changedstate.release()

1593

1771

time2 = datetime.datetime.now()

1594

1772

if (time2 - time) >= delay:

1610

1788

try:

1611

1789

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

1612

1790

except gnutls.errors.GNUTLSError as error:

1613

logger.warning("gnutls send failed")

1791

logger.warning("gnutls send failed",

1792

exc_info=error)

1614

1793

return

1615

1794

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

1616

1795

sent, len(client.secret)

1619

1798

1620

1799

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

1621

1800

# bump the timeout using extended_timeout

1622

client.checked_ok(client.extended_timeout)

1801

client.bump_timeout(client.extended_timeout)

1623

1802

if self.server.use_dbus:

1624

1803

# Emit D-Bus signal

1625

1804

client.GotSecret()

1630

1809

try:

1631

1810

session.bye()

1632

1811

except gnutls.errors.GNUTLSError as error:

1633

logger.warning("GnuTLS bye failed")

1812

logger.warning("GnuTLS bye failed",

1813

exc_info=error)

1634

1814

1635

1815

@staticmethod

1636

1816

def peer_certificate(session):

1708

1888

def process_request(self, request, address):

1709

1889

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

1710

1890

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

1711

args = (request,

1712

address))

1891

args = (request, address))

1713

1892

proc.start()

1714

1893

return proc

1715

1894

1743

1922

use_ipv6: Boolean; to use IPv6 or not

1744

1923

"""

1745

1924

def __init__(self, server_address, RequestHandlerClass,

1746

interface=None, use_ipv6=True):

1925

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

1926

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

1927

creating a new one with socket.socket().

1928

"""

1747

1929

self.interface = interface

1748

1930

if use_ipv6:

1749

1931

self.address_family = socket.AF_INET6

1932

if socketfd is not None:

1933

# Save the file descriptor

1934

self.socketfd = socketfd

1935

# Save the original socket.socket() function

1936

self.socket_socket = socket.socket

1937

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

1938

#

1939

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

1940

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

1941

# patching socket.socket.)

1942

#

1943

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

1944

@functools.wraps(socket.socket)

1945

def socket_wrapper(*args, **kwargs):

1946

# Restore original function so subsequent calls are

1947

# not affected.

1948

socket.socket = self.socket_socket

1949

del self.socket_socket

1950

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

1951

# saved file descriptor.

1952

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

1953

# Replace socket.socket() function with wrapper

1954

socket.socket = socket_wrapper

1955

# The socketserver.TCPServer.__init__ will call

1956

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

1957

# socket_wrapper(), if socketfd was set.

1750

1958

socketserver.TCPServer.__init__(self, server_address,

1751

1959

RequestHandlerClass)

1960

1752

1961

def server_bind(self):

1753

1962

"""This overrides the normal server_bind() function

1754

1963

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

1762

1971

try:

1763

1972

self.socket.setsockopt(socket.SOL_SOCKET,

1764

1973

SO_BINDTODEVICE,

1765

str(self.interface

1766

+ '\0'))

1974

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

1767

1975

except socket.error as error:

1768

if error[0] == errno.EPERM:

1769

logger.error("No permission to"

1770

" bind to interface %s",

1771

self.interface)

1772

elif error[0] == errno.ENOPROTOOPT:

1976

if error.errno == errno.EPERM:

1977

logger.error("No permission to bind to"

1978

" interface %s", self.interface)

1979

elif error.errno == errno.ENOPROTOOPT:

1773

1980

logger.error("SO_BINDTODEVICE not available;"

1774

1981

" cannot bind to interface %s",

1775

1982

self.interface)

1983

elif error.errno == errno.ENODEV:

1984

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

1985

" cannot bind", self.interface)

1776

1986

else:

1777

1987

raise

1778

1988

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

1781

1991

if self.address_family == socket.AF_INET6:

1782

1992

any_address = "::" # in6addr_any

1783

1993

else:

1784

any_address = socket.INADDR_ANY

1994

any_address = "0.0.0.0" # INADDR_ANY

1785

1995

self.server_address = (any_address,

1786

1996

self.server_address[1])

1787

1997

elif not self.server_address[1]:

1808

2018

"""

1809

2019

def __init__(self, server_address, RequestHandlerClass,

1810

2020

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

1811

gnutls_priority=None, use_dbus=True):

2021

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

1812

2022

self.enabled = False

1813

2023

self.clients = clients

1814

2024

if self.clients is None:

1818

2028

IPv6_TCPServer.__init__(self, server_address,

1819

2029

RequestHandlerClass,

1820

2030

interface = interface,

1821

use_ipv6 = use_ipv6)

2031

use_ipv6 = use_ipv6,

2032

socketfd = socketfd)

1822

2033

def server_activate(self):

1823

2034

if self.enabled:

1824

2035

return socketserver.TCPServer.server_activate(self)

1837

2048

1838

2049

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

1839

2050

proc = None, client_object=None):

1840

condition_names = {

1841

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

1842

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

1843

# blocking).

1844

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

1845

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

1846

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

1847

# broken, usually for pipes and

1848

# sockets).

1849

}

1850

conditions_string = ' | '.join(name

1851

for cond, name in

1852

condition_names.iteritems()

1853

if cond & condition)

1854

2051

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

1855

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

2052

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

1856

2053

# Wait for other process to exit

1857

2054

proc.join()

1858

2055

return False

1916

2113

return True

1917

2114

1918

2115

2116

def rfc3339_duration_to_delta(duration):

2117

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

2118

2119

>>> rfc3339_duration_to_delta("P7D")

2120

datetime.timedelta(7)

2121

>>> rfc3339_duration_to_delta("PT60S")

2122

datetime.timedelta(0, 60)

2123

>>> rfc3339_duration_to_delta("PT60M")

2124

datetime.timedelta(0, 3600)

2125

>>> rfc3339_duration_to_delta("PT24H")

2126

datetime.timedelta(1)

2127

>>> rfc3339_duration_to_delta("P1W")

2128

datetime.timedelta(7)

2129

>>> rfc3339_duration_to_delta("PT5M30S")

2130

datetime.timedelta(0, 330)

2131

>>> rfc3339_duration_to_delta("P1DT3M20S")

2132

datetime.timedelta(1, 200)

2133

"""

2134

2135

# Parsing an RFC 3339 duration with regular expressions is not

2136

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

2137

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

2138

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

2139

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

2140

# avoid excessive use of external libraries.

2141

2142

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

2143

Token = collections.namedtuple("Token",

2144

("regexp", # To match token; if

2145

# "value" is not None,

2146

# must have a "group"

2147

# containing digits

2148

"value", # datetime.timedelta or

2149

# None

2150

"followers")) # Tokens valid after

2151

# this token

2152

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

2153

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

2154

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

2155

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

2156

datetime.timedelta(seconds=1),

2157

frozenset((token_end,)))

2158

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

2159

datetime.timedelta(minutes=1),

2160

frozenset((token_second, token_end)))

2161

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

2162

datetime.timedelta(hours=1),

2163

frozenset((token_minute, token_end)))

2164

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

2165

None,

2166

frozenset((token_hour, token_minute,

2167

token_second)))

2168

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

2169

datetime.timedelta(days=1),

2170

frozenset((token_time, token_end)))

2171

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

2172

datetime.timedelta(weeks=4),

2173

frozenset((token_day, token_end)))

2174

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

2175

datetime.timedelta(weeks=52),

2176

frozenset((token_month, token_end)))

2177

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

2178

datetime.timedelta(weeks=1),

2179

frozenset((token_end,)))

2180

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

2181

frozenset((token_year, token_month,

2182

token_day, token_time,

2183

token_week))),

2184

# Define starting values

2185

value = datetime.timedelta() # Value so far

2186

found_token = None

2187

followers = frozenset(token_duration,) # Following valid tokens

2188

s = duration # String left to parse

2189

# Loop until end token is found

2190

while found_token is not token_end:

2191

# Search for any currently valid tokens

2192

for token in followers:

2193

match = token.regexp.match(s)

2194

if match is not None:

2195

# Token found

2196

if token.value is not None:

2197

# Value found, parse digits

2198

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

2199

# Add to value so far

2200

value += factor * token.value

2201

# Strip token from string

2202

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

2203

# Go to found token

2204

found_token = token

2205

# Set valid next tokens

2206

followers = found_token.followers

2207

break

2208

else:

2209

# No currently valid tokens were found

2210

raise ValueError("Invalid RFC 3339 duration")

2211

# End token found

2212

return value

2213

2214

1919

2215

def string_to_delta(interval):

1920

2216

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

1921

2217

1932

2228

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

1933

2229

datetime.timedelta(0, 330)

1934

2230

"""

2231

2232

try:

2233

return rfc3339_duration_to_delta(interval)

2234

except ValueError:

2235

pass

2236

1935

2237

timevalue = datetime.timedelta(0)

1936

2238

for s in interval.split():

1937

2239

try:

1948

2250

elif suffix == "w":

1949

2251

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

1950

2252

else:

1951

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

2253

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

2254

.format(suffix))

1952

2255

except (ValueError, IndexError) as e:

1953

2256

raise ValueError(*(e.args))

1954

2257

timevalue += delta

1968

2271

sys.exit()

1969

2272

if not noclose:

1970

2273

# Close all standard open file descriptors

1971

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

2274

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

1972

2275

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

1973

2276

raise OSError(errno.ENODEV,

1974

"%s not a character device"

1975

% os.path.devnull)

2277

"{0} not a character device"

2278

.format(os.devnull))

1976

2279

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

1977

2280

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

1978

2281

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

1987

2290

1988

2291

parser = argparse.ArgumentParser()

1989

2292

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

1990

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

2293

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

1991

2294

help="show version number and exit")

1992

2295

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

1993

2296

help="Bind to interface IF")

1999

2302

help="Run self-test")

2000

2303

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

2001

2304

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

2002

" to terminal")

2305

" to terminal", default=None)

2003

2306

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

2004

2307

help="Debug level for stdout output")

2005

2308

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

2012

2315

" files")

2013

2316

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

2014

2317

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

2015

" system bus interface")

2318

" system bus interface", default=None)

2016

2319

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

2017

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

2320

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

2321

default=None)

2018

2322

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

2019

2323

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

2020

" state")

2324

" state", default=None)

2325

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

2326

help="Specify a file descriptor to a network"

2327

" socket to use instead of creating one")

2021

2328

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

2022

2329

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

2330

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

2331

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

2023

2332

2024

2333

options = parser.parse_args()

2025

2334

2034

2343

"port": "",

2035

2344

"debug": "False",

2036

2345

"priority":

2037

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

2346

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

2038

2347

"servicename": "Mandos",

2039

2348

"use_dbus": "True",

2040

2349

"use_ipv6": "True",

2041

2350

"debuglevel": "",

2042

2351

"restore": "True",

2043

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

2352

"socket": "",

2353

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

2354

"foreground": "False",

2044

2355

}

2045

2356

2046

2357

# Parse config file for server-global settings

2051

2362

# Convert the SafeConfigParser object to a dict

2052

2363

server_settings = server_config.defaults()

2053

2364

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

2054

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

2365

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

2055

2366

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

2056

2367

option)

2057

2368

if server_settings["port"]:

2058

2369

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

2059

2370

"port")

2371

if server_settings["socket"]:

2372

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

2373

"socket")

2374

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

2375

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

2376

# happen with a supplied network socket.

2377

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

2378

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

2379

["socket"])

2060

2380

del server_config

2061

2381

2062

2382

# Override the settings from the config file with command line

2064

2384

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

2065

2385

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

2066

2386

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

2067

"statedir"):

2387

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

2068

2388

value = getattr(options, option)

2069

2389

if value is not None:

2070

2390

server_settings[option] = value

2073

2393

for option in server_settings.keys():

2074

2394

if type(server_settings[option]) is str:

2075

2395

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

2396

# Force all boolean options to be boolean

2397

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

2398

"foreground"):

2399

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

2400

# Debug implies foreground

2401

if server_settings["debug"]:

2402

server_settings["foreground"] = True

2076

2403

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

2077

2404

2078

2405

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

2084

2411

use_ipv6 = server_settings["use_ipv6"]

2085

2412

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

2086

2413

stored_state_file)

2414

foreground = server_settings["foreground"]

2087

2415

2088

2416

if debug:

2089

2417

initlogger(debug, logging.DEBUG)

2096

2424

2097

2425

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

2098

2426

syslogger.setFormatter(logging.Formatter

2099

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

2100

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

2101

% server_settings["servicename"]))

2427

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

2428

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

2429

.format(server_settings

2430

["servicename"])))

2102

2431

2103

2432

# Parse config file with clients

2104

client_config = configparser.SafeConfigParser(Client.client_defaults)

2433

client_config = configparser.SafeConfigParser(Client

2434

.client_defaults)

2105

2435

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

2106

2436

"clients.conf"))

2107

2437

2116

2446

use_ipv6=use_ipv6,

2117

2447

gnutls_priority=

2118

2448

server_settings["priority"],

2119

use_dbus=use_dbus)

2120

if not debug:

2121

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

2449

use_dbus=use_dbus,

2450

socketfd=(server_settings["socket"]

2451

or None))

2452

if not foreground:

2453

pidfilename = "/run/mandos.pid"

2454

pidfile = None

2122

2455

try:

2123

2456

pidfile = open(pidfilename, "w")

2124

except IOError:

2125

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

2457

except IOError as e:

2458

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

2459

exc_info=e)

2126

2460

2127

try:

2128

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

2129

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

2130

except KeyError:

2461

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

2131

2462

try:

2132

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

2133

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

2463

uid = pwd.getpwnam(name).pw_uid

2464

gid = pwd.getpwnam(name).pw_gid

2465

break

2134

2466

except KeyError:

2135

try:

2136

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

2137

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

2138

except KeyError:

2139

uid = 65534

2140

gid = 65534

2467

continue

2468

else:

2469

uid = 65534

2470

gid = 65534

2141

2471

try:

2142

2472

os.setgid(gid)

2143

2473

os.setuid(uid)

2144

2474

except OSError as error:

2145

if error[0] != errno.EPERM:

2475

if error.errno != errno.EPERM:

2146

2476

raise error

2147

2477

2148

2478

if debug:

2160

2490

.gnutls_global_set_log_function(debug_gnutls))

2161

2491

2162

2492

# Redirect stdin so all checkers get /dev/null

2163

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

2493

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

2164

2494

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

2165

2495

if null > 2:

2166

2496

os.close(null)

2167

2497

2168

2498

# Need to fork before connecting to D-Bus

2169

if not debug:

2499

if not foreground:

2170

2500

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

2171

2501

daemon()

2172

2502

2503

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

2504

# need to inform gobject that threads will be used.

2173

2505

gobject.threads_init()

2174

2506

2175

2507

global main_loop

2176

2508

# From the Avahi example code

2177

DBusGMainLoop(set_as_default=True )

2509

DBusGMainLoop(set_as_default=True)

2178

2510

main_loop = gobject.MainLoop()

2179

2511

bus = dbus.SystemBus()

2180

2512

# End of Avahi example code

2186

2518

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

2187

2519

do_not_queue=True))

2188

2520

except dbus.exceptions.NameExistsException as e:

2189

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

2521

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

2190

2522

use_dbus = False

2191

2523

server_settings["use_dbus"] = False

2192

2524

tcp_server.use_dbus = False

2204

2536

2205

2537

client_class = Client

2206

2538

if use_dbus:

2207

client_class = functools.partial(ClientDBusTransitional,

2208

bus = bus)

2539

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

2209

2540

2210

2541

client_settings = Client.config_parser(client_config)

2211

2542

old_client_settings = {}

2212

2543

clients_data = {}

2213

2544

2545

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

2546

global wnull

2547

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

2548

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

2549

# mode

2550

if debug or not foreground:

2551

wnull.close()

2552

2214

2553

# Get client data and settings from last running state.

2215

2554

if server_settings["restore"]:

2216

2555

try:

2219

2558

(stored_state))

2220

2559

os.remove(stored_state_path)

2221

2560

except IOError as e:

2222

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

2223

.format(e))

2224

if e.errno != errno.ENOENT:

2561

if e.errno == errno.ENOENT:

2562

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

2563

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

2564

else:

2565

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

2566

exc_info=e)

2225

2567

raise

2226

2568

except EOFError as e:

2227

2569

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

2228

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

2570

"EOFError:", exc_info=e)

2229

2571

2230

2572

with PGPEngine() as pgp:

2231

2573

for client_name, client in clients_data.iteritems():

2574

# Skip removed clients

2575

if client_name not in client_settings:

2576

continue

2577

2232

2578

# Decide which value to use after restoring saved state.

2233

2579

# We have three different values: Old config file,

2234

2580

# new config file, and saved state.

2248

2594

2249

2595

# Clients who has passed its expire date can still be

2250

2596

# enabled if its last checker was successful. Clients

2251

# whose checker failed before we stored its state is

2252

# assumed to have failed all checkers during downtime.

2597

# whose checker succeeded before we stored its state is

2598

# assumed to have successfully run all checkers during

2599

# downtime.

2253

2600

if client["enabled"]:

2254

2601

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

2255

2602

if not client["last_checked_ok"]:

2256

2603

logger.warning(

2257

2604

"disabling client {0} - Client never "

2258

"performed a successfull checker"

2259

.format(client["name"]))

2605

"performed a successful checker"

2606

.format(client_name))

2260

2607

client["enabled"] = False

2261

2608

elif client["last_checker_status"] != 0:

2262

2609

logger.warning(

2263

2610

"disabling client {0} - Client "

2264

2611

"last checker failed with error code {1}"

2265

.format(client["name"],

2612

.format(client_name,

2266

2613

client["last_checker_status"]))

2267

2614

client["enabled"] = False

2268

2615

else:

2271

2618

+ client["timeout"])

2272

2619

logger.debug("Last checker succeeded,"

2273

2620

" keeping {0} enabled"

2274

.format(client["name"]))

2621

.format(client_name))

2275

2622

try:

2276

2623

client["secret"] = (

2277

2624

pgp.decrypt(client["encrypted_secret"],

2283

2630

.format(client_name))

2284

2631

client["secret"] = (

2285

2632

client_settings[client_name]["secret"])

2286

2287

2633

2288

2634

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

2289

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

2635

for client_name in (set(old_client_settings)

2636

- set(client_settings)):

2290

2637

del clients_data[client_name]

2291

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

2638

for client_name in (set(client_settings)

2639

- set(old_client_settings)):

2292

2640

clients_data[client_name] = client_settings[client_name]

2293

2294

# Create clients all clients

2641

2642

# Create all client objects

2295

2643

for client_name, client in clients_data.iteritems():

2296

2644

tcp_server.clients[client_name] = client_class(

2297

name = client_name, settings = client)

2645

name = client_name, settings = client,

2646

server_settings = server_settings)

2298

2647

2299

2648

if not tcp_server.clients:

2300

2649

logger.warning("No clients defined")

2301

2302

if not debug:

2303

try:

2304

with pidfile:

2305

pid = os.getpid()

2306

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

2307

del pidfile

2308

except IOError:

2309

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

2310

pidfilename, pid)

2311

except NameError:

2312

# "pidfile" was never created

2313

pass

2650

2651

if not foreground:

2652

if pidfile is not None:

2653

try:

2654

with pidfile:

2655

pid = os.getpid()

2656

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

2657

except IOError:

2658

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

2659

pidfilename, pid)

2660

del pidfile

2314

2661

del pidfilename

2315

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

2316

2662

2317

2663

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

2318

2664

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

2319

2665

2320

2666

if use_dbus:

2321

class MandosDBusService(dbus.service.Object):

2667

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

2668

"se.bsnet.fukt.Mandos"})

2669

class MandosDBusService(DBusObjectWithProperties):

2322

2670

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

2323

2671

def __init__(self):

2324

2672

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

2325

2673

_interface = "se.recompile.Mandos"

2326

2674

2675

@dbus_interface_annotations(_interface)

2676

def _foo(self):

2677

return { "org.freedesktop.DBus.Property"

2678

".EmitsChangedSignal":

2679

"false"}

2680

2327

2681

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

2328

2682

def ClientAdded(self, objpath):

2329

2683

"D-Bus signal"

2371

2725

2372

2726

del _interface

2373

2727

2374

class MandosDBusServiceTransitional(MandosDBusService):

2375

__metaclass__ = AlternateDBusNamesMetaclass

2376

mandos_dbus_service = MandosDBusServiceTransitional()

2728

mandos_dbus_service = MandosDBusService()

2377

2729

2378

2730

def cleanup():

2379

2731

"Cleanup function; run on exit"

2380

2732

service.cleanup()

2381

2733

2382

2734

multiprocessing.active_children()

2735

wnull.close()

2383

2736

if not (tcp_server.clients or client_settings):

2384

2737

return

2385

2738

2397

2750

# A list of attributes that can not be pickled

2398

2751

# + secret.

2399

2752

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

2400

"checker"))

2753

"checker", "server_settings"))

2401

2754

for name, typ in (inspect.getmembers

2402

2755

(dbus.service.Object)):

2403

2756

exclude.add(name)

2412

2765

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

2413

2766

2414

2767

try:

2415

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

2416

prefix="clients-",

2417

dir=os.path.dirname

2418

(stored_state_path))

2419

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

2768

with (tempfile.NamedTemporaryFile

2769

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

2770

dir=os.path.dirname(stored_state_path),

2771

delete=False)) as stored_state:

2420

2772

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

2773

tempname=stored_state.name

2421

2774

os.rename(tempname, stored_state_path)

2422

2775

except (IOError, OSError) as e:

2423

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

2424

.format(e))

2425

2776

if not debug:

2426

2777

try:

2427

2778

os.remove(tempname)

2428

2779

except NameError:

2429

2780

pass

2430

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

2431

errno.EEXIST)):

2781

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

2782

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

2783

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

2784

else:

2785

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

2786

exc_info=e)

2432

2787

raise e

2433

2788

2434

2789

# Delete all clients, and settings from config

2462

2817

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

2463

2818

if use_ipv6:

2464

2819

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

2465

" flowinfo %d, scope_id %d"

2466

% tcp_server.socket.getsockname())

2820

" flowinfo %d, scope_id %d",

2821

*tcp_server.socket.getsockname())

2467

2822

else: # IPv4

2468

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

2469

% tcp_server.socket.getsockname())

2823

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

2824

*tcp_server.socket.getsockname())

2470

2825

2471

2826

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

2472

2827

2475

2830

try:

2476

2831

service.activate()

2477

2832

except dbus.exceptions.DBusException as error:

2478

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

2833

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

2479

2834

cleanup()

2480

2835

sys.exit(1)

2481

2836

# End of Avahi example code

2488

2843

logger.debug("Starting main loop")

2489

2844

main_loop.run()

2490

2845

except AvahiError as error:

2491

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

2846

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

2492

2847

cleanup()

2493

2848

sys.exit(1)

2494

2849

except KeyboardInterrupt: