/mandos/trunk : revision 777

1

#!/usr/bin/python

1

#!/usr/bin/python2.7

2

# -*- mode: python; coding: utf-8 -*-

3

#

4

# Mandos server - give out binary blobs to connecting clients.

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

36

37

from future_builtins import *

38

39

import SocketServer as socketserver

39

try:

40

import SocketServer as socketserver

41

except ImportError:

42

import socketserver

40

43

import socket

41

44

import argparse

42

45

import datetime

47

50

import gnutls.library.functions

48

51

import gnutls.library.constants

49

52

import gnutls.library.types

50

import ConfigParser as configparser

53

try:

54

import ConfigParser as configparser

55

except ImportError:

56

import configparser

51

57

import sys

52

58

import re

53

59

import os

62

68

import struct

63

69

import fcntl

64

70

import functools

65

import cPickle as pickle

71

try:

72

import cPickle as pickle

73

except ImportError:

74

import pickle

66

75

import multiprocessing

67

76

import types

68

77

import binascii

69

78

import tempfile

70

79

import itertools

71

80

import collections

81

import codecs

72

82

73

83

import dbus

74

84

import dbus.service

75

import gobject

85

try:

86

import gobject

87

except ImportError:

88

from gi.repository import GObject as gobject

76

89

import avahi

77

90

from dbus.mainloop.glib import DBusGMainLoop

78

91

import ctypes

88

101

except ImportError:

89

102

SO_BINDTODEVICE = None

90

103

91

version = "1.6.2"

104

if sys.version_info.major == 2:

105

str = unicode

106

107

version = "1.6.9"

92

108

stored_state_file = "clients.pickle"

93

109

94

110

logger = logging.getLogger()

95

syslogger = (logging.handlers.SysLogHandler

96

(facility = logging.handlers.SysLogHandler.LOG_DAEMON,

97

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

111

syslogger = None

98

112

99

113

try:

100

if_nametoindex = (ctypes.cdll.LoadLibrary

101

(ctypes.util.find_library("c"))

102

.if_nametoindex)

114

if_nametoindex = ctypes.cdll.LoadLibrary(

115

ctypes.util.find_library("c")).if_nametoindex

103

116

except (OSError, AttributeError):

117

104

118

def if_nametoindex(interface):

105

119

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

106

120

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

107

121

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

108

122

ifreq = fcntl.ioctl(s, SIOCGIFINDEX,

109

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

110

interface))

111

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

112

ifreq[16:20])[0]

123

struct.pack(b"16s16x", interface))

124

interface_index = struct.unpack("I", ifreq[16:20])[0]

113

125

return interface_index

114

126

115

127

116

128

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

117

129

"""init logger and add loglevel"""

118

130

131

global syslogger

132

syslogger = (logging.handlers.SysLogHandler(

133

facility = logging.handlers.SysLogHandler.LOG_DAEMON,

134

address = "/dev/log"))

119

135

syslogger.setFormatter(logging.Formatter

120

136

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

121

137

' %(message)s'))

138

154

139

155

class PGPEngine(object):

140

156

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

157

141

158

def __init__(self):

142

159

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

143

160

self.gnupgargs = ['--batch',

182

199

183

200

def encrypt(self, data, password):

184

201

passphrase = self.password_encode(password)

185

with tempfile.NamedTemporaryFile(dir=self.tempdir

186

) as passfile:

202

with tempfile.NamedTemporaryFile(

203

dir=self.tempdir) as passfile:

187

204

passfile.write(passphrase)

188

205

passfile.flush()

189

206

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

200

217

201

218

def decrypt(self, data, password):

202

219

passphrase = self.password_encode(password)

203

with tempfile.NamedTemporaryFile(dir = self.tempdir

204

) as passfile:

220

with tempfile.NamedTemporaryFile(

221

dir = self.tempdir) as passfile:

205

222

passfile.write(passphrase)

206

223

passfile.flush()

207

224

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

211

228

stdin = subprocess.PIPE,

212

229

stdout = subprocess.PIPE,

213

230

stderr = subprocess.PIPE)

214

decrypted_plaintext, err = proc.communicate(input

215

= data)

231

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

216

232

if proc.returncode != 0:

217

233

raise PGPError(err)

218

234

return decrypted_plaintext

221

237

class AvahiError(Exception):

222

238

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

223

239

self.value = value

224

super(AvahiError, self).__init__(value, *args, **kwargs)

225

def __unicode__(self):

226

return unicode(repr(self.value))

240

return super(AvahiError, self).__init__(value, *args,

241

**kwargs)

242

227

243

228

244

class AvahiServiceError(AvahiError):

229

245

pass

230

246

247

231

248

class AvahiGroupError(AvahiError):

232

249

pass

233

250

253

270

bus: dbus.SystemBus()

254

271

"""

255

272

256

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

257

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

258

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

259

protocol = avahi.PROTO_UNSPEC, bus = None):

273

def __init__(self,

274

interface = avahi.IF_UNSPEC,

275

name = None,

276

servicetype = None,

277

port = None,

278

TXT = None,

279

domain = "",

280

host = "",

281

max_renames = 32768,

282

protocol = avahi.PROTO_UNSPEC,

283

bus = None):

260

284

self.interface = interface

261

285

self.name = name

262

286

self.type = servicetype

272

296

self.bus = bus

273

297

self.entry_group_state_changed_match = None

274

298

275

def rename(self):

299

def rename(self, remove=True):

276

300

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

277

301

if self.rename_count >= self.max_renames:

278

302

logger.critical("No suitable Zeroconf service name found"

279

303

" after %i retries, exiting.",

280

304

self.rename_count)

281

305

raise AvahiServiceError("Too many renames")

282

self.name = unicode(self.server

283

.GetAlternativeServiceName(self.name))

306

self.name = str(

307

self.server.GetAlternativeServiceName(self.name))

308

self.rename_count += 1

284

309

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

285

310

self.name)

286

self.remove()

311

if remove:

312

self.remove()

287

313

try:

288

314

self.add()

289

315

except dbus.exceptions.DBusException as error:

290

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

291

self.cleanup()

292

os._exit(1)

293

self.rename_count += 1

316

if (error.get_dbus_name()

317

== "org.freedesktop.Avahi.CollisionError"):

318

logger.info("Local Zeroconf service name collision.")

319

return self.rename(remove=False)

320

else:

321

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

322

self.cleanup()

323

os._exit(1)

294

324

295

325

def remove(self):

296

326

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

334

364

self.rename()

335

365

elif state == avahi.ENTRY_GROUP_FAILURE:

336

366

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

337

unicode(error))

338

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

339

.format(error))

367

str(error))

368

raise AvahiGroupError("State changed: {!s}".format(error))

340

369

341

370

def cleanup(self):

342

371

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

352

381

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

353

382

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

354

383

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

355

bad_states = { avahi.SERVER_INVALID:

356

"Zeroconf server invalid",

357

avahi.SERVER_REGISTERING: None,

358

avahi.SERVER_COLLISION:

359

"Zeroconf server name collision",

360

avahi.SERVER_FAILURE:

361

"Zeroconf server failure" }

384

bad_states = {

385

avahi.SERVER_INVALID: "Zeroconf server invalid",

386

avahi.SERVER_REGISTERING: None,

387

avahi.SERVER_COLLISION: "Zeroconf server name collision",

388

avahi.SERVER_FAILURE: "Zeroconf server failure",

389

}

362

390

if state in bad_states:

363

391

if bad_states[state] is not None:

364

392

if error is None:

367

395

logger.error(bad_states[state] + ": %r", error)

368

396

self.cleanup()

369

397

elif state == avahi.SERVER_RUNNING:

370

self.add()

398

try:

399

self.add()

400

except dbus.exceptions.DBusException as error:

401

if (error.get_dbus_name()

402

== "org.freedesktop.Avahi.CollisionError"):

403

logger.info("Local Zeroconf service name"

404

" collision.")

405

return self.rename(remove=False)

406

else:

407

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

408

self.cleanup()

409

os._exit(1)

371

410

else:

372

411

if error is None:

373

412

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

383

422

follow_name_owner_changes=True),

384

423

avahi.DBUS_INTERFACE_SERVER)

385

424

self.server.connect_to_signal("StateChanged",

386

self.server_state_changed)

425

self.server_state_changed)

387

426

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

388

427

389

428

390

429

class AvahiServiceToSyslog(AvahiService):

391

def rename(self):

430

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

392

431

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

393

ret = AvahiService.rename(self)

394

syslogger.setFormatter(logging.Formatter

395

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

396

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

397

.format(self.name)))

432

ret = AvahiService.rename(self, *args, **kwargs)

433

syslogger.setFormatter(logging.Formatter(

434

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

435

.format(self.name)))

398

436

return ret

399

437

400

401

def timedelta_to_milliseconds(td):

402

"Convert a datetime.timedelta() to milliseconds"

403

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

404

+ (td.seconds * 1000)

405

+ (td.microseconds // 1000))

406

438

def call_pipe(connection, # : multiprocessing.Connection

439

func, *args, **kwargs):

440

"""This function is meant to be called by multiprocessing.Process

441

442

This function runs func(*args, **kwargs), and writes the resulting

443

return value on the provided multiprocessing.Connection.

444

"""

445

connection.send(func(*args, **kwargs))

446

connection.close()

407

447

408

448

class Client(object):

409

449

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

436

476

last_checker_status: integer between 0 and 255 reflecting exit

437

477

status of last checker. -1 reflects crashed

438

478

checker, -2 means no checker completed yet.

479

last_checker_signal: The signal which killed the last checker, if

480

last_checker_status is -1

439

481

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

440

482

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

441

483

D-Bus identifiers

454

496

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

455

497

"last_approval_request", "last_checked_ok",

456

498

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

457

client_defaults = { "timeout": "PT5M",

458

"extended_timeout": "PT15M",

459

"interval": "PT2M",

460

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

461

"host": "",

462

"approval_delay": "PT0S",

463

"approval_duration": "PT1S",

464

"approved_by_default": "True",

465

"enabled": "True",

466

}

467

468

def timeout_milliseconds(self):

469

"Return the 'timeout' attribute in milliseconds"

470

return timedelta_to_milliseconds(self.timeout)

471

472

def extended_timeout_milliseconds(self):

473

"Return the 'extended_timeout' attribute in milliseconds"

474

return timedelta_to_milliseconds(self.extended_timeout)

475

476

def interval_milliseconds(self):

477

"Return the 'interval' attribute in milliseconds"

478

return timedelta_to_milliseconds(self.interval)

479

480

def approval_delay_milliseconds(self):

481

return timedelta_to_milliseconds(self.approval_delay)

499

client_defaults = {

500

"timeout": "PT5M",

501

"extended_timeout": "PT15M",

502

"interval": "PT2M",

503

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

504

"host": "",

505

"approval_delay": "PT0S",

506

"approval_duration": "PT1S",

507

"approved_by_default": "True",

508

"enabled": "True",

509

}

482

510

483

511

@staticmethod

484

512

def config_parser(config):

500

528

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

501

529

"enabled")

502

530

531

# Uppercase and remove spaces from fingerprint for later

532

# comparison purposes with return value from the

533

# fingerprint() function

503

534

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

504

535

.replace(" ", ""))

505

536

if "secret" in section:

510

541

"rb") as secfile:

511

542

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

512

543

else:

513

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

544

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

514

545

.format(section))

515

546

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

516

547

client["extended_timeout"] = string_to_delta(

533

564

server_settings = {}

534

565

self.server_settings = server_settings

535

566

# adding all client settings

536

for setting, value in settings.iteritems():

567

for setting, value in settings.items():

537

568

setattr(self, setting, value)

538

569

539

570

if self.enabled:

547

578

self.expires = None

548

579

549

580

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

550

# Uppercase and remove spaces from fingerprint for later

551

# comparison purposes with return value from the fingerprint()

552

# function

553

581

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

554

582

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

555

583

datetime.datetime.utcnow())

562

590

self.current_checker_command = None

563

591

self.approved = None

564

592

self.approvals_pending = 0

565

self.changedstate = (multiprocessing_manager

566

.Condition(multiprocessing_manager

567

.Lock()))

568

self.client_structure = [attr for attr in

569

self.__dict__.iterkeys()

593

self.changedstate = multiprocessing_manager.Condition(

594

multiprocessing_manager.Lock())

595

self.client_structure = [attr

596

for attr in self.__dict__.iterkeys()

570

597

if not attr.startswith("_")]

571

598

self.client_structure.append("client_structure")

572

599

573

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

574

lambda obj:

575

isinstance(obj,

576

property)):

600

for name, t in inspect.getmembers(

601

type(self), lambda obj: isinstance(obj, property)):

577

602

if not name.startswith("_"):

578

603

self.client_structure.append(name)

579

604

621

646

# and every interval from then on.

622

647

if self.checker_initiator_tag is not None:

623

648

gobject.source_remove(self.checker_initiator_tag)

624

self.checker_initiator_tag = (gobject.timeout_add

625

(self.interval_milliseconds(),

626

self.start_checker))

649

self.checker_initiator_tag = gobject.timeout_add(

650

int(self.interval.total_seconds() * 1000),

651

self.start_checker)

627

652

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

628

653

if self.disable_initiator_tag is not None:

629

654

gobject.source_remove(self.disable_initiator_tag)

630

self.disable_initiator_tag = (gobject.timeout_add

631

(self.timeout_milliseconds(),

632

self.disable))

655

self.disable_initiator_tag = gobject.timeout_add(

656

int(self.timeout.total_seconds() * 1000), self.disable)

633

657

# Also start a new checker *right now*.

634

658

self.start_checker()

635

659

636

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

660

def checker_callback(self, source, condition, connection,

661

command):

637

662

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

638

663

self.checker_callback_tag = None

639

664

self.checker = None

640

if os.WIFEXITED(condition):

641

self.last_checker_status = os.WEXITSTATUS(condition)

665

# Read return code from connection (see call_pipe)

666

returncode = connection.recv()

667

connection.close()

668

669

if returncode >= 0:

670

self.last_checker_status = returncode

671

self.last_checker_signal = None

642

672

if self.last_checker_status == 0:

643

673

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

644

674

vars(self))

645

675

self.checked_ok()

646

676

else:

647

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

648

vars(self))

677

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

649

678

else:

650

679

self.last_checker_status = -1

680

self.last_checker_signal = -returncode

651

681

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

652

682

vars(self))

683

return False

653

684

654

685

def checked_ok(self):

655

686

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

656

687

self.last_checked_ok = datetime.datetime.utcnow()

657

688

self.last_checker_status = 0

689

self.last_checker_signal = None

658

690

self.bump_timeout()

659

691

660

692

def bump_timeout(self, timeout=None):

665

697

gobject.source_remove(self.disable_initiator_tag)

666

698

self.disable_initiator_tag = None

667

699

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

668

self.disable_initiator_tag = (gobject.timeout_add

669

(timedelta_to_milliseconds

670

(timeout), self.disable))

700

self.disable_initiator_tag = gobject.timeout_add(

701

int(timeout.total_seconds() * 1000), self.disable)

671

702

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

672

703

673

704

def need_approval(self):

687

718

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

688

719

# should be.

689

720

690

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

691

try:

692

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

693

except AttributeError:

694

pass

695

except OSError as error:

696

if error.errno != errno.ECHILD:

697

raise

698

else:

699

if pid:

700

logger.warning("Checker was a zombie")

701

gobject.source_remove(self.checker_callback_tag)

702

self.checker_callback(pid, status,

703

self.current_checker_command)

721

if self.checker is not None and not self.checker.is_alive():

722

logger.warning("Checker was not alive; joining")

723

self.checker.join()

724

self.checker = None

704

725

# Start a new checker if needed

705

726

if self.checker is None:

706

727

# 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)

728

escaped_attrs = {

729

attr: re.escape(str(getattr(self, attr)))

730

for attr in self.runtime_expansions }

711

731

try:

712

732

command = self.checker_command % escaped_attrs

713

733

except TypeError as error:

714

734

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

715

self.checker_command, exc_info=error)

716

return True # Try again later

735

self.checker_command,

736

exc_info=error)

737

return True # Try again later

717

738

self.current_checker_command = command

718

try:

719

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

720

command, self.name)

721

# We don't need to redirect stdout and stderr, since

722

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

723

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

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 })

733

self.checker = subprocess.Popen(command,

734

close_fds=True,

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:

748

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

749

except OSError as 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)

739

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

740

self.name)

741

# We don't need to redirect stdout and stderr, since

742

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

743

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

744

# always replaced by /dev/null.)

745

# The exception is when not debugging but nevertheless

746

# running in the foreground; use the previously

747

# created wnull.

748

popen_args = { "close_fds": True,

749

"shell": True,

750

"cwd": "/" }

751

if (not self.server_settings["debug"]

752

and self.server_settings["foreground"]):

753

popen_args.update({"stdout": wnull,

754

"stderr": wnull })

755

pipe = multiprocessing.Pipe(duplex = False)

756

self.checker = multiprocessing.Process(

757

target = call_pipe,

758

args = (pipe[1], subprocess.call, command),

759

kwargs = popen_args)

760

self.checker.start()

761

self.checker_callback_tag = gobject.io_add_watch(

762

pipe[0].fileno(), gobject.IO_IN,

763

self.checker_callback, pipe[0], command)

759

764

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

760

765

return True

761

766

767

772

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

768

773

return

769

774

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

770

try:

771

self.checker.terminate()

772

#time.sleep(0.5)

773

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

774

# self.checker.kill()

775

except OSError as error:

776

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

777

raise

775

self.checker.terminate()

778

776

self.checker = None

779

777

780

778

781

def dbus_service_property(dbus_interface, signature="v",

782

access="readwrite", byte_arrays=False):

779

def dbus_service_property(dbus_interface,

780

signature="v",

781

access="readwrite",

782

byte_arrays=False):

783

"""Decorators for marking methods of a DBusObjectWithProperties to

784

become properties on the D-Bus.

785

794

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

795

if byte_arrays and signature != "ay":

796

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

797

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

797

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

798

799

def decorator(func):

799

800

func._dbus_is_property = True

800

801

func._dbus_interface = dbus_interface

805

806

func._dbus_name = func._dbus_name[:-14]

806

807

func._dbus_get_args_options = {'byte_arrays': byte_arrays }

807

808

return func

809

808

810

return decorator

809

811

810

812

819

821

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

820

822

"false"}

821

823

"""

824

822

825

def decorator(func):

823

826

func._dbus_is_interface = True

824

827

func._dbus_interface = dbus_interface

825

828

func._dbus_name = dbus_interface

826

829

return func

830

827

831

return decorator

828

832

829

833

831

835

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

832

836

Usage:

833

837

838

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

839

"org.freedesktop.DBus.Property."

840

"EmitsChangedSignal": "false"})

834

841

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

835

842

access="r")

836

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

837

"org.freedesktop.DBus.Property."

838

"EmitsChangedSignal": "false"})

839

843

def Property_dbus_property(self):

840

844

return dbus.Boolean(False)

841

845

"""

846

842

847

def decorator(func):

843

848

func._dbus_annotations = annotations

844

849

return func

850

845

851

return decorator

846

852

847

853

848

854

class DBusPropertyException(dbus.exceptions.DBusException):

849

855

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

850

856

"""

851

def __unicode__(self):

852

return unicode(str(self))

857

pass

853

858

854

859

855

860

class DBusPropertyAccessException(DBusPropertyException):

879

884

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

880

885

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

881

886

"""

882

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

887

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

883

888

False)

884

889

885

890

def _get_all_dbus_things(self, thing):

886

891

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

887

892

"""

888

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

889

name),

893

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

890

894

athing.__get__(self))

891

895

for cls in self.__class__.__mro__

892

896

for name, athing in

893

inspect.getmembers(cls,

894

self._is_dbus_thing(thing)))

897

inspect.getmembers(cls, self._is_dbus_thing(thing)))

895

898

896

899

def _get_dbus_property(self, interface_name, property_name):

897

900

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

898

901

property with the specified name and interface.

899

902

"""

900

for cls in self.__class__.__mro__:

901

for name, value in (inspect.getmembers

902

(cls,

903

self._is_dbus_thing("property"))):

903

for cls in self.__class__.__mro__:

904

for name, value in inspect.getmembers(

905

cls, self._is_dbus_thing("property")):

904

906

if (value._dbus_name == property_name

905

907

and value._dbus_interface == interface_name):

906

908

return value.__get__(self)

907

909

908

910

# No such property

909

raise DBusPropertyNotFound(self.dbus_object_path + ":"

910

+ interface_name + "."

911

+ property_name)

911

raise DBusPropertyNotFound("{}:{}.{}".format(

912

self.dbus_object_path, interface_name, property_name))

912

913

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

914

@dbus.service.method(dbus.PROPERTIES_IFACE,

915

in_signature="ss",

914

916

out_signature="v")

915

917

def Get(self, interface_name, property_name):

916

918

"""Standard D-Bus property Get() method, see D-Bus standard.

934

936

# The byte_arrays option is not supported yet on

935

937

# signatures other than "ay".

936

938

if prop._dbus_signature != "ay":

937

raise ValueError

939

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

940

"'ay' signature {!r}"

941

.format(prop._dbus_signature))

938

942

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

939

943

for byte in value))

940

944

prop(value)

941

945

942

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

946

@dbus.service.method(dbus.PROPERTIES_IFACE,

947

in_signature="s",

943

948

out_signature="a{sv}")

944

949

def GetAll(self, interface_name):

945

950

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

960

965

if not hasattr(value, "variant_level"):

961

966

properties[name] = value

962

967

continue

963

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

964

value.variant_level+1)

968

properties[name] = type(value)(

969

value, variant_level = value.variant_level + 1)

965

970

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

966

971

972

@dbus.service.signal(dbus.PROPERTIES_IFACE, signature="sa{sv}as")

973

def PropertiesChanged(self, interface_name, changed_properties,

974

invalidated_properties):

975

"""Standard D-Bus PropertiesChanged() signal, see D-Bus

976

standard.

977

"""

978

pass

979

967

980

@dbus.service.method(dbus.INTROSPECTABLE_IFACE,

968

981

out_signature="s",

969

982

path_keyword='object_path',

977

990

connection)

978

991

try:

979

992

document = xml.dom.minidom.parseString(xmlstring)

993

980

994

def make_tag(document, name, prop):

981

995

e = document.createElement("property")

982

996

e.setAttribute("name", name)

983

997

e.setAttribute("type", prop._dbus_signature)

984

998

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

985

999

return e

1000

986

1001

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

987

1002

# Add property tags

988

1003

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

1000

1015

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

1001

1016

and prop._dbus_interface

1002

1017

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

1003

annots.update(getattr

1004

(prop,

1005

"_dbus_annotations",

1006

{}))

1007

for name, value in annots.iteritems():

1018

annots.update(getattr(

1019

prop, "_dbus_annotations", {}))

1020

for name, value in annots.items():

1008

1021

ann_tag = document.createElement(

1009

1022

"annotation")

1010

1023

ann_tag.setAttribute("name", name)

1013

1026

# Add interface annotation tags

1014

1027

for annotation, value in dict(

1015

1028

itertools.chain.from_iterable(

1016

annotations().iteritems()

1017

for name, annotations in

1018

self._get_all_dbus_things("interface")

1029

annotations().items()

1030

for name, annotations

1031

in self._get_all_dbus_things("interface")

1019

1032

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

1020

)).iteritems():

1033

)).items():

1021

1034

ann_tag = document.createElement("annotation")

1022

1035

ann_tag.setAttribute("name", annotation)

1023

1036

ann_tag.setAttribute("value", value)

1050

1063

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

1051

1064

if dt is None:

1052

1065

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

1053

return dbus.String(dt.isoformat(),

1054

variant_level=variant_level)

1066

return dbus.String(dt.isoformat(), variant_level=variant_level)

1055

1067

1056

1068

1057

1069

def alternate_dbus_interfaces(alt_interface_names, deprecate=True):

1077

1089

(from DBusObjectWithProperties) and interfaces (from the

1078

1090

dbus_interface_annotations decorator).

1079

1091

"""

1092

1080

1093

def wrapper(cls):

1081

1094

for orig_interface_name, alt_interface_name in (

1082

alt_interface_names.iteritems()):

1095

alt_interface_names.items()):

1083

1096

attr = {}

1084

1097

interface_names = set()

1085

1098

# Go though all attributes of the class

1087

1100

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

1088

1101

# with the wrong interface name

1089

1102

if (not hasattr(attribute, "_dbus_interface")

1090

or not attribute._dbus_interface

1091

.startswith(orig_interface_name)):

1103

or not attribute._dbus_interface.startswith(

1104

orig_interface_name)):

1092

1105

continue

1093

1106

# Create an alternate D-Bus interface name based on

1094

1107

# the current name

1095

alt_interface = (attribute._dbus_interface

1096

.replace(orig_interface_name,

1097

alt_interface_name))

1108

alt_interface = attribute._dbus_interface.replace(

1109

orig_interface_name, alt_interface_name)

1098

1110

interface_names.add(alt_interface)

1099

1111

# Is this a D-Bus signal?

1100

1112

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

1101

# Extract the original non-method undecorated

1102

# function by black magic

1103

nonmethod_func = (dict(

1113

if sys.version_info.major == 2:

1114

# Extract the original non-method undecorated

1115

# function by black magic

1116

nonmethod_func = (dict(

1104

1117

zip(attribute.func_code.co_freevars,

1105

attribute.__closure__))["func"]

1106

.cell_contents)

1118

attribute.__closure__))

1119

["func"].cell_contents)

1120

else:

1121

nonmethod_func = attribute

1107

1122

# Create a new, but exactly alike, function

1108

1123

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

1109

1124

# with the alternate D-Bus interface name

1110

new_function = (dbus.service.signal

1111

(alt_interface,

1112

attribute._dbus_signature)

1113

(types.FunctionType(

1114

nonmethod_func.func_code,

1115

nonmethod_func.func_globals,

1116

nonmethod_func.func_name,

1117

nonmethod_func.func_defaults,

1118

nonmethod_func.func_closure)))

1125

if sys.version_info.major == 2:

1126

new_function = types.FunctionType(

1127

nonmethod_func.func_code,

1128

nonmethod_func.func_globals,

1129

nonmethod_func.func_name,

1130

nonmethod_func.func_defaults,

1131

nonmethod_func.func_closure)

1132

else:

1133

new_function = types.FunctionType(

1134

nonmethod_func.__code__,

1135

nonmethod_func.__globals__,

1136

nonmethod_func.__name__,

1137

nonmethod_func.__defaults__,

1138

nonmethod_func.__closure__)

1139

new_function = (dbus.service.signal(

1140

alt_interface,

1141

attribute._dbus_signature)(new_function))

1119

1142

# Copy annotations, if any

1120

1143

try:

1121

new_function._dbus_annotations = (

1122

dict(attribute._dbus_annotations))

1144

new_function._dbus_annotations = dict(

1145

attribute._dbus_annotations)

1123

1146

except AttributeError:

1124

1147

pass

1125

1148

# Define a creator of a function to call both the

1130

1153

"""This function is a scope container to pass

1131

1154

func1 and func2 to the "call_both" function

1132

1155

outside of its arguments"""

1156

1133

1157

def call_both(*args, **kwargs):

1134

1158

"""This function will emit two D-Bus

1135

1159

signals by calling func1 and func2"""

1136

1160

func1(*args, **kwargs)

1137

1161

func2(*args, **kwargs)

1162

1138

1163

return call_both

1139

1164

# Create the "call_both" function and add it to

1140

1165

# the class

1145

1170

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

1146

1171

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

1147

1172

# to the class.

1148

attr[attrname] = (dbus.service.method

1149

(alt_interface,

1150

attribute._dbus_in_signature,

1151

attribute._dbus_out_signature)

1152

(types.FunctionType

1153

(attribute.func_code,

1154

attribute.func_globals,

1155

attribute.func_name,

1156

attribute.func_defaults,

1157

attribute.func_closure)))

1173

attr[attrname] = (

1174

dbus.service.method(

1175

alt_interface,

1176

attribute._dbus_in_signature,

1177

attribute._dbus_out_signature)

1178

(types.FunctionType(attribute.func_code,

1179

attribute.func_globals,

1180

attribute.func_name,

1181

attribute.func_defaults,

1182

attribute.func_closure)))

1158

1183

# Copy annotations, if any

1159

1184

try:

1160

attr[attrname]._dbus_annotations = (

1161

dict(attribute._dbus_annotations))

1185

attr[attrname]._dbus_annotations = dict(

1186

attribute._dbus_annotations)

1162

1187

except AttributeError:

1163

1188

pass

1164

1189

# Is this a D-Bus property?

1167

1192

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

1168

1193

# property with the alternate D-Bus interface

1169

1194

# name. Add it to the class.

1170

attr[attrname] = (dbus_service_property

1171

(alt_interface,

1172

attribute._dbus_signature,

1173

attribute._dbus_access,

1174

attribute

1175

._dbus_get_args_options

1176

["byte_arrays"])

1177

(types.FunctionType

1178

(attribute.func_code,

1179

attribute.func_globals,

1180

attribute.func_name,

1181

attribute.func_defaults,

1182

attribute.func_closure)))

1195

attr[attrname] = (dbus_service_property(

1196

alt_interface, attribute._dbus_signature,

1197

attribute._dbus_access,

1198

attribute._dbus_get_args_options

1199

["byte_arrays"])

1200

(types.FunctionType(

1201

attribute.func_code,

1202

attribute.func_globals,

1203

attribute.func_name,

1204

attribute.func_defaults,

1205

attribute.func_closure)))

1183

1206

# Copy annotations, if any

1184

1207

try:

1185

attr[attrname]._dbus_annotations = (

1186

dict(attribute._dbus_annotations))

1208

attr[attrname]._dbus_annotations = dict(

1209

attribute._dbus_annotations)

1187

1210

except AttributeError:

1188

1211

pass

1189

1212

# Is this a D-Bus interface?

1192

1215

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

1193

1216

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

1194

1217

# 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)))

1218

attr[attrname] = (

1219

dbus_interface_annotations(alt_interface)

1220

(types.FunctionType(attribute.func_code,

1221

attribute.func_globals,

1222

attribute.func_name,

1223

attribute.func_defaults,

1224

attribute.func_closure)))

1203

1225

if deprecate:

1204

1226

# Deprecate all alternate interfaces

1205

iname="_AlternateDBusNames_interface_annotation{0}"

1227

iname="_AlternateDBusNames_interface_annotation{}"

1206

1228

for interface_name in interface_names:

1229

1207

1230

@dbus_interface_annotations(interface_name)

1208

1231

def func(self):

1209

1232

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

1210

"true" }

1233

"true" }

1211

1234

# Find an unused name

1212

1235

for aname in (iname.format(i)

1213

1236

for i in itertools.count()):

1217

1240

if interface_names:

1218

1241

# Replace the class with a new subclass of it with

1219

1242

# methods, signals, etc. as created above.

1220

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

1221

(cls,), attr)

1243

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

1244

(cls, ), attr)

1222

1245

return cls

1246

1223

1247

return wrapper

1224

1248

1225

1249

1226

1250

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

1227

"se.bsnet.fukt.Mandos"})

1251

"se.bsnet.fukt.Mandos"})

1228

1252

class ClientDBus(Client, DBusObjectWithProperties):

1229

1253

"""A Client class using D-Bus

1230

1254

1234

1258

"""

1235

1259

1236

1260

runtime_expansions = (Client.runtime_expansions

1237

+ ("dbus_object_path",))

1261

+ ("dbus_object_path", ))

1262

1263

_interface = "se.recompile.Mandos.Client"

1238

1264

1239

1265

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

1240

1266

1243

1269

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

1244

1270

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

1245

1271

# the D-Bus

1246

client_object_name = unicode(self.name).translate(

1272

client_object_name = str(self.name).translate(

1247

1273

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

1248

1274

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

1249

self.dbus_object_path = (dbus.ObjectPath

1250

("/clients/" + client_object_name))

1275

self.dbus_object_path = dbus.ObjectPath(

1276

"/clients/" + client_object_name)

1251

1277

DBusObjectWithProperties.__init__(self, self.bus,

1252

1278

self.dbus_object_path)

1253

1279

1254

def notifychangeproperty(transform_func,

1255

dbus_name, type_func=lambda x: x,

1256

variant_level=1):

1280

def notifychangeproperty(transform_func, dbus_name,

1281

type_func=lambda x: x,

1282

variant_level=1,

1283

invalidate_only=False,

1284

_interface=_interface):

1257

1285

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

1258

1286

its changes to DBus.

1259

1287

1264

1292

to the D-Bus. Default: no transform

1265

1293

variant_level: D-Bus variant level. Default: 1

1266

1294

"""

1267

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

1295

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

1296

1268

1297

def setter(self, value):

1269

1298

if hasattr(self, "dbus_object_path"):

1270

1299

if (not hasattr(self, attrname) or

1271

1300

type_func(getattr(self, attrname, None))

1272

1301

!= type_func(value)):

1273

dbus_value = transform_func(type_func(value),

1274

variant_level

1275

=variant_level)

1276

self.PropertyChanged(dbus.String(dbus_name),

1277

dbus_value)

1302

if invalidate_only:

1303

self.PropertiesChanged(

1304

_interface, dbus.Dictionary(),

1305

dbus.Array((dbus_name, )))

1306

else:

1307

dbus_value = transform_func(

1308

type_func(value),

1309

variant_level = variant_level)

1310

self.PropertyChanged(dbus.String(dbus_name),

1311

dbus_value)

1312

self.PropertiesChanged(

1313

_interface,

1314

dbus.Dictionary({ dbus.String(dbus_name):

1315

dbus_value }),

1316

dbus.Array())

1278

1317

setattr(self, attrname, value)

1279

1318

1280

1319

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

1286

1325

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

1287

1326

last_enabled = notifychangeproperty(datetime_to_dbus,

1288

1327

"LastEnabled")

1289

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

1290

type_func = lambda checker:

1291

checker is not None)

1328

checker = notifychangeproperty(

1329

dbus.Boolean, "CheckerRunning",

1330

type_func = lambda checker: checker is not None)

1292

1331

last_checked_ok = notifychangeproperty(datetime_to_dbus,

1293

1332

"LastCheckedOK")

1294

1333

last_checker_status = notifychangeproperty(dbus.Int16,

1297

1336

datetime_to_dbus, "LastApprovalRequest")

1298

1337

approved_by_default = notifychangeproperty(dbus.Boolean,

1299

1338

"ApprovedByDefault")

1300

approval_delay = notifychangeproperty(dbus.UInt64,

1301

"ApprovalDelay",

1302

type_func =

1303

timedelta_to_milliseconds)

1339

approval_delay = notifychangeproperty(

1340

dbus.UInt64, "ApprovalDelay",

1341

type_func = lambda td: td.total_seconds() * 1000)

1304

1342

approval_duration = notifychangeproperty(

1305

1343

dbus.UInt64, "ApprovalDuration",

1306

type_func = timedelta_to_milliseconds)

1344

type_func = lambda td: td.total_seconds() * 1000)

1307

1345

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

1308

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

1309

type_func =

1310

timedelta_to_milliseconds)

1346

timeout = notifychangeproperty(

1347

dbus.UInt64, "Timeout",

1348

type_func = lambda td: td.total_seconds() * 1000)

1311

1349

extended_timeout = notifychangeproperty(

1312

1350

dbus.UInt64, "ExtendedTimeout",

1313

type_func = timedelta_to_milliseconds)

1314

interval = notifychangeproperty(dbus.UInt64,

1315

"Interval",

1316

type_func =

1317

timedelta_to_milliseconds)

1351

type_func = lambda td: td.total_seconds() * 1000)

1352

interval = notifychangeproperty(

1353

dbus.UInt64, "Interval",

1354

type_func = lambda td: td.total_seconds() * 1000)

1318

1355

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

1356

secret = notifychangeproperty(dbus.ByteArray, "Secret",

1357

invalidate_only=True)

1319

1358

1320

1359

del notifychangeproperty

1321

1360

1328

1367

DBusObjectWithProperties.__del__(self, *args, **kwargs)

1329

1368

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

1330

1369

1331

def checker_callback(self, pid, condition, command,

1332

*args, **kwargs):

1333

self.checker_callback_tag = None

1334

self.checker = None

1335

if os.WIFEXITED(condition):

1336

exitstatus = os.WEXITSTATUS(condition)

1370

def checker_callback(self, source, condition,

1371

connection, command, *args, **kwargs):

1372

ret = Client.checker_callback(self, source, condition,

1373

connection, command, *args,

1374

**kwargs)

1375

exitstatus = self.last_checker_status

1376

if exitstatus >= 0:

1337

1377

# Emit D-Bus signal

1338

1378

self.CheckerCompleted(dbus.Int16(exitstatus),

1339

dbus.Int64(condition),

1379

dbus.Int64(0),

1340

1380

dbus.String(command))

1341

1381

else:

1342

1382

# Emit D-Bus signal

1343

1383

self.CheckerCompleted(dbus.Int16(-1),

1344

dbus.Int64(condition),

1384

dbus.Int64(

1385

self.last_checker_signal),

1345

1386

dbus.String(command))

1346

1347

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

1348

*args, **kwargs)

1387

return ret

1349

1388

1350

1389

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

1351

old_checker = self.checker

1352

if self.checker is not None:

1353

old_checker_pid = self.checker.pid

1354

else:

1355

old_checker_pid = None

1390

old_checker_pid = getattr(self.checker, "pid", None)

1356

1391

r = Client.start_checker(self, *args, **kwargs)

1357

1392

# Only if new checker process was started

1358

1393

if (self.checker is not None

1367

1402

1368

1403

def approve(self, value=True):

1369

1404

self.approved = value

1370

gobject.timeout_add(timedelta_to_milliseconds

1371

(self.approval_duration),

1372

self._reset_approved)

1405

gobject.timeout_add(int(self.approval_duration.total_seconds()

1406

* 1000), self._reset_approved)

1373

1407

self.send_changedstate()

1374

1408

1375

1409

## D-Bus methods, signals & properties

1376

_interface = "se.recompile.Mandos.Client"

1377

1410

1378

1411

## Interfaces

1379

1412

1380

@dbus_interface_annotations(_interface)

1381

def _foo(self):

1382

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

1383

"false"}

1384

1385

1413

## Signals

1386

1414

1387

1415

# CheckerCompleted - signal

1397

1425

pass

1398

1426

1399

1427

# PropertyChanged - signal

1428

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

1400

1429

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

1401

1430

def PropertyChanged(self, property, value):

1402

1431

"D-Bus signal"

1466

1495

return dbus.Boolean(bool(self.approvals_pending))

1467

1496

1468

1497

# ApprovedByDefault - property

1469

@dbus_service_property(_interface, signature="b",

1498

@dbus_service_property(_interface,

1499

signature="b",

1470

1500

access="readwrite")

1471

1501

def ApprovedByDefault_dbus_property(self, value=None):

1472

1502

if value is None: # get

1474

1504

self.approved_by_default = bool(value)

1475

1505

1476

1506

# ApprovalDelay - property

1477

@dbus_service_property(_interface, signature="t",

1507

@dbus_service_property(_interface,

1508

signature="t",

1478

1509

access="readwrite")

1479

1510

def ApprovalDelay_dbus_property(self, value=None):

1480

1511

if value is None: # get

1481

return dbus.UInt64(self.approval_delay_milliseconds())

1512

return dbus.UInt64(self.approval_delay.total_seconds()

1513

* 1000)

1482

1514

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

1483

1515

1484

1516

# ApprovalDuration - property

1485

@dbus_service_property(_interface, signature="t",

1517

@dbus_service_property(_interface,

1518

signature="t",

1486

1519

access="readwrite")

1487

1520

def ApprovalDuration_dbus_property(self, value=None):

1488

1521

if value is None: # get

1489

return dbus.UInt64(timedelta_to_milliseconds(

1490

self.approval_duration))

1522

return dbus.UInt64(self.approval_duration.total_seconds()

1523

* 1000)

1491

1524

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

1492

1525

1493

1526

# Name - property

1501

1534

return dbus.String(self.fingerprint)

1502

1535

1503

1536

# Host - property

1504

@dbus_service_property(_interface, signature="s",

1537

@dbus_service_property(_interface,

1538

signature="s",

1505

1539

access="readwrite")

1506

1540

def Host_dbus_property(self, value=None):

1507

1541

if value is None: # get

1508

1542

return dbus.String(self.host)

1509

self.host = unicode(value)

1543

self.host = str(value)

1510

1544

1511

1545

# Created - property

1512

1546

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

1519

1553

return datetime_to_dbus(self.last_enabled)

1520

1554

1521

1555

# Enabled - property

1522

@dbus_service_property(_interface, signature="b",

1556

@dbus_service_property(_interface,

1557

signature="b",

1523

1558

access="readwrite")

1524

1559

def Enabled_dbus_property(self, value=None):

1525

1560

if value is None: # get

1530

1565

self.disable()

1531

1566

1532

1567

# LastCheckedOK - property

1533

@dbus_service_property(_interface, signature="s",

1568

@dbus_service_property(_interface,

1569

signature="s",

1534

1570

access="readwrite")

1535

1571

def LastCheckedOK_dbus_property(self, value=None):

1536

1572

if value is not None:

1539

1575

return datetime_to_dbus(self.last_checked_ok)

1540

1576

1541

1577

# LastCheckerStatus - property

1542

@dbus_service_property(_interface, signature="n",

1543

access="read")

1578

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

1544

1579

def LastCheckerStatus_dbus_property(self):

1545

1580

return dbus.Int16(self.last_checker_status)

1546

1581

1555

1590

return datetime_to_dbus(self.last_approval_request)

1556

1591

1557

1592

# Timeout - property

1558

@dbus_service_property(_interface, signature="t",

1593

@dbus_service_property(_interface,

1594

signature="t",

1559

1595

access="readwrite")

1560

1596

def Timeout_dbus_property(self, value=None):

1561

1597

if value is None: # get

1562

return dbus.UInt64(self.timeout_milliseconds())

1598

return dbus.UInt64(self.timeout.total_seconds() * 1000)

1563

1599

old_timeout = self.timeout

1564

1600

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

1565

1601

# Reschedule disabling

1574

1610

is None):

1575

1611

return

1576

1612

gobject.source_remove(self.disable_initiator_tag)

1577

self.disable_initiator_tag = (

1578

gobject.timeout_add(

1579

timedelta_to_milliseconds(self.expires - now),

1580

self.disable))

1613

self.disable_initiator_tag = gobject.timeout_add(

1614

int((self.expires - now).total_seconds() * 1000),

1615

self.disable)

1581

1616

1582

1617

# ExtendedTimeout - property

1583

@dbus_service_property(_interface, signature="t",

1618

@dbus_service_property(_interface,

1619

signature="t",

1584

1620

access="readwrite")

1585

1621

def ExtendedTimeout_dbus_property(self, value=None):

1586

1622

if value is None: # get

1587

return dbus.UInt64(self.extended_timeout_milliseconds())

1623

return dbus.UInt64(self.extended_timeout.total_seconds()

1624

* 1000)

1588

1625

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

1589

1626

1590

1627

# Interval - property

1591

@dbus_service_property(_interface, signature="t",

1628

@dbus_service_property(_interface,

1629

signature="t",

1592

1630

access="readwrite")

1593

1631

def Interval_dbus_property(self, value=None):

1594

1632

if value is None: # get

1595

return dbus.UInt64(self.interval_milliseconds())

1633

return dbus.UInt64(self.interval.total_seconds() * 1000)

1596

1634

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

1597

1635

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

1598

1636

return

1599

1637

if self.enabled:

1600

1638

# Reschedule checker run

1601

1639

gobject.source_remove(self.checker_initiator_tag)

1602

self.checker_initiator_tag = (gobject.timeout_add

1603

(value, self.start_checker))

1604

self.start_checker() # Start one now, too

1640

self.checker_initiator_tag = gobject.timeout_add(

1641

value, self.start_checker)

1642

self.start_checker() # Start one now, too

1605

1643

1606

1644

# Checker - property

1607

@dbus_service_property(_interface, signature="s",

1645

@dbus_service_property(_interface,

1646

signature="s",

1608

1647

access="readwrite")

1609

1648

def Checker_dbus_property(self, value=None):

1610

1649

if value is None: # get

1611

1650

return dbus.String(self.checker_command)

1612

self.checker_command = unicode(value)

1651

self.checker_command = str(value)

1613

1652

1614

1653

# CheckerRunning - property

1615

@dbus_service_property(_interface, signature="b",

1654

@dbus_service_property(_interface,

1655

signature="b",

1616

1656

access="readwrite")

1617

1657

def CheckerRunning_dbus_property(self, value=None):

1618

1658

if value is None: # get

1628

1668

return self.dbus_object_path # is already a dbus.ObjectPath

1629

1669

1630

1670

# Secret = property

1631

@dbus_service_property(_interface, signature="ay",

1632

access="write", byte_arrays=True)

1671

@dbus_service_property(_interface,

1672

signature="ay",

1673

access="write",

1674

byte_arrays=True)

1633

1675

def Secret_dbus_property(self, value):

1634

self.secret = str(value)

1676

self.secret = bytes(value)

1635

1677

1636

1678

del _interface

1637

1679

1641

1683

self._pipe = child_pipe

1642

1684

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

1643

1685

if not self._pipe.recv():

1644

raise KeyError()

1686

raise KeyError(fpr)

1645

1687

1646

1688

def __getattribute__(self, name):

1647

1689

if name == '_pipe':

1651

1693

if data[0] == 'data':

1652

1694

return data[1]

1653

1695

if data[0] == 'function':

1696

1654

1697

def func(*args, **kwargs):

1655

1698

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

1656

1699

return self._pipe.recv()[1]

1700

1657

1701

return func

1658

1702

1659

1703

def __setattr__(self, name, value):

1671

1715

def handle(self):

1672

1716

with contextlib.closing(self.server.child_pipe) as child_pipe:

1673

1717

logger.info("TCP connection from: %s",

1674

unicode(self.client_address))

1718

str(self.client_address))

1675

1719

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

1676

1720

self.server.child_pipe.fileno())

1677

1721

1678

session = (gnutls.connection

1679

.ClientSession(self.request,

1680

gnutls.connection

1681

.X509Credentials()))

1722

session = gnutls.connection.ClientSession(

1723

self.request, gnutls.connection .X509Credentials())

1682

1724

1683

1725

# Note: gnutls.connection.X509Credentials is really a

1684

1726

# generic GnuTLS certificate credentials object so long as

1693

1735

priority = self.server.gnutls_priority

1694

1736

if priority is None:

1695

1737

priority = "NORMAL"

1696

(gnutls.library.functions

1697

.gnutls_priority_set_direct(session._c_object,

1698

priority, None))

1738

gnutls.library.functions.gnutls_priority_set_direct(

1739

session._c_object, priority, None)

1699

1740

1700

1741

# Start communication using the Mandos protocol

1701

1742

# Get protocol number

1721

1762

approval_required = False

1722

1763

try:

1723

1764

try:

1724

fpr = self.fingerprint(self.peer_certificate

1725

(session))

1765

fpr = self.fingerprint(

1766

self.peer_certificate(session))

1726

1767

except (TypeError,

1727

1768

gnutls.errors.GNUTLSError) as error:

1728

1769

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

1743

1784

while True:

1744

1785

if not client.enabled:

1745

1786

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

1746

client.name)

1787

client.name)

1747

1788

if self.server.use_dbus:

1748

1789

# Emit D-Bus signal

1749

1790

client.Rejected("Disabled")

1758

1799

if self.server.use_dbus:

1759

1800

# Emit D-Bus signal

1760

1801

client.NeedApproval(

1761

client.approval_delay_milliseconds(),

1762

client.approved_by_default)

1802

client.approval_delay.total_seconds()

1803

* 1000, client.approved_by_default)

1763

1804

else:

1764

1805

logger.warning("Client %s was not approved",

1765

1806

client.name)

1771

1812

#wait until timeout or approved

1772

1813

time = datetime.datetime.now()

1773

1814

client.changedstate.acquire()

1774

client.changedstate.wait(

1775

float(timedelta_to_milliseconds(delay)

1776

/ 1000))

1815

client.changedstate.wait(delay.total_seconds())

1777

1816

client.changedstate.release()

1778

1817

time2 = datetime.datetime.now()

1779

1818

if (time2 - time) >= delay:

1798

1837

logger.warning("gnutls send failed",

1799

1838

exc_info=error)

1800

1839

return

1801

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

1802

sent, len(client.secret)

1803

- (sent_size + sent))

1840

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

1841

len(client.secret) - (sent_size

1842

+ sent))

1804

1843

sent_size += sent

1805

1844

1806

1845

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

1823

1862

def peer_certificate(session):

1824

1863

"Return the peer's OpenPGP certificate as a bytestring"

1825

1864

# If not an OpenPGP certificate...

1826

if (gnutls.library.functions

1827

.gnutls_certificate_type_get(session._c_object)

1865

if (gnutls.library.functions.gnutls_certificate_type_get(

1866

session._c_object)

1828

1867

!= gnutls.library.constants.GNUTLS_CRT_OPENPGP):

1829

1868

# ...do the normal thing

1830

1869

return session.peer_certificate

1844

1883

def fingerprint(openpgp):

1845

1884

"Convert an OpenPGP bytestring to a hexdigit fingerprint"

1846

1885

# New GnuTLS "datum" with the OpenPGP public key

1847

datum = (gnutls.library.types

1848

.gnutls_datum_t(ctypes.cast(ctypes.c_char_p(openpgp),

1849

ctypes.POINTER

1850

(ctypes.c_ubyte)),

1851

ctypes.c_uint(len(openpgp))))

1886

datum = gnutls.library.types.gnutls_datum_t(

1887

ctypes.cast(ctypes.c_char_p(openpgp),

1888

ctypes.POINTER(ctypes.c_ubyte)),

1889

ctypes.c_uint(len(openpgp)))

1852

1890

# New empty GnuTLS certificate

1853

1891

crt = gnutls.library.types.gnutls_openpgp_crt_t()

1854

(gnutls.library.functions

1855

.gnutls_openpgp_crt_init(ctypes.byref(crt)))

1892

gnutls.library.functions.gnutls_openpgp_crt_init(

1893

ctypes.byref(crt))

1856

1894

# Import the OpenPGP public key into the certificate

1857

(gnutls.library.functions

1858

.gnutls_openpgp_crt_import(crt, ctypes.byref(datum),

1859

gnutls.library.constants

1860

.GNUTLS_OPENPGP_FMT_RAW))

1895

gnutls.library.functions.gnutls_openpgp_crt_import(

1896

crt, ctypes.byref(datum),

1897

gnutls.library.constants.GNUTLS_OPENPGP_FMT_RAW)

1861

1898

# Verify the self signature in the key

1862

1899

crtverify = ctypes.c_uint()

1863

(gnutls.library.functions

1864

.gnutls_openpgp_crt_verify_self(crt, 0,

1865

ctypes.byref(crtverify)))

1900

gnutls.library.functions.gnutls_openpgp_crt_verify_self(

1901

crt, 0, ctypes.byref(crtverify))

1866

1902

if crtverify.value != 0:

1867

1903

gnutls.library.functions.gnutls_openpgp_crt_deinit(crt)

1868

raise (gnutls.errors.CertificateSecurityError

1869

("Verify failed"))

1904

raise gnutls.errors.CertificateSecurityError(

1905

"Verify failed")

1870

1906

# New buffer for the fingerprint

1871

1907

buf = ctypes.create_string_buffer(20)

1872

1908

buf_len = ctypes.c_size_t()

1873

1909

# Get the fingerprint from the certificate into the buffer

1874

(gnutls.library.functions

1875

.gnutls_openpgp_crt_get_fingerprint(crt, ctypes.byref(buf),

1876

ctypes.byref(buf_len)))

1910

gnutls.library.functions.gnutls_openpgp_crt_get_fingerprint(

1911

crt, ctypes.byref(buf), ctypes.byref(buf_len))

1877

1912

# Deinit the certificate

1878

1913

gnutls.library.functions.gnutls_openpgp_crt_deinit(crt)

1879

1914

# Convert the buffer to a Python bytestring

1885

1920

1886

1921

class MultiprocessingMixIn(object):

1887

1922

"""Like socketserver.ThreadingMixIn, but with multiprocessing"""

1923

1888

1924

def sub_process_main(self, request, address):

1889

1925

try:

1890

1926

self.finish_request(request, address)

1902

1938

1903

1939

class MultiprocessingMixInWithPipe(MultiprocessingMixIn, object):

1904

1940

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

1941

1905

1942

def process_request(self, request, client_address):

1906

1943

"""Overrides and wraps the original process_request().

1907

1944

1928

1965

interface: None or a network interface name (string)

1929

1966

use_ipv6: Boolean; to use IPv6 or not

1930

1967

"""

1968

1931

1969

def __init__(self, server_address, RequestHandlerClass,

1932

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

1970

interface=None,

1971

use_ipv6=True,

1972

socketfd=None):

1933

1973

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

1934

1974

creating a new one with socket.socket().

1935

1975

"""

1976

2016

self.interface)

1977

2017

else:

1978

2018

try:

1979

self.socket.setsockopt(socket.SOL_SOCKET,

1980

SO_BINDTODEVICE,

1981

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

2019

self.socket.setsockopt(

2020

socket.SOL_SOCKET, SO_BINDTODEVICE,

2021

(self.interface + "\0").encode("utf-8"))

1982

2022

except socket.error as error:

1983

2023

if error.errno == errno.EPERM:

1984

2024

logger.error("No permission to bind to"

2002

2042

self.server_address = (any_address,

2003

2043

self.server_address[1])

2004

2044

elif not self.server_address[1]:

2005

self.server_address = (self.server_address[0],

2006

0)

2045

self.server_address = (self.server_address[0], 0)

2007

2046

# if self.interface:

2008

2047

# self.server_address = (self.server_address[0],

2009

2048

# 0, # port

2023

2062

2024

2063

Assumes a gobject.MainLoop event loop.

2025

2064

"""

2065

2026

2066

def __init__(self, server_address, RequestHandlerClass,

2027

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

2028

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

2067

interface=None,

2068

use_ipv6=True,

2069

clients=None,

2070

gnutls_priority=None,

2071

use_dbus=True,

2072

socketfd=None):

2029

2073

self.enabled = False

2030

2074

self.clients = clients

2031

2075

if self.clients is None:

2037

2081

interface = interface,

2038

2082

use_ipv6 = use_ipv6,

2039

2083

socketfd = socketfd)

2084

2040

2085

def server_activate(self):

2041

2086

if self.enabled:

2042

2087

return socketserver.TCPServer.server_activate(self)

2046

2091

2047

2092

def add_pipe(self, parent_pipe, proc):

2048

2093

# Call "handle_ipc" for both data and EOF events

2049

gobject.io_add_watch(parent_pipe.fileno(),

2050

gobject.IO_IN | gobject.IO_HUP,

2051

functools.partial(self.handle_ipc,

2052

parent_pipe =

2053

parent_pipe,

2054

proc = proc))

2094

gobject.io_add_watch(

2095

parent_pipe.fileno(),

2096

gobject.IO_IN | gobject.IO_HUP,

2097

functools.partial(self.handle_ipc,

2098

parent_pipe = parent_pipe,

2099

proc = proc))

2055

2100

2056

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

2057

proc = None, client_object=None):

2101

def handle_ipc(self, source, condition,

2102

parent_pipe=None,

2103

proc = None,

2104

client_object=None):

2058

2105

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

2059

2106

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

2060

2107

# Wait for other process to exit

2083

2130

parent_pipe.send(False)

2084

2131

return False

2085

2132

2086

gobject.io_add_watch(parent_pipe.fileno(),

2087

gobject.IO_IN | gobject.IO_HUP,

2088

functools.partial(self.handle_ipc,

2089

parent_pipe =

2090

parent_pipe,

2091

proc = proc,

2092

client_object =

2093

client))

2133

gobject.io_add_watch(

2134

parent_pipe.fileno(),

2135

gobject.IO_IN | gobject.IO_HUP,

2136

functools.partial(self.handle_ipc,

2137

parent_pipe = parent_pipe,

2138

proc = proc,

2139

client_object = client))

2094

2140

parent_pipe.send(True)

2095

2141

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

2096

2142

# same fileno

2102

2148

2103

2149

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

2104

2150

funcname)(*args,

2105

**kwargs)))

2151

**kwargs)))

2106

2152

2107

2153

if command == 'getattr':

2108

2154

attrname = request[1]

2109

if callable(client_object.__getattribute__(attrname)):

2110

parent_pipe.send(('function',))

2155

if isinstance(client_object.__getattribute__(attrname),

2156

collections.Callable):

2157

parent_pipe.send(('function', ))

2111

2158

else:

2112

parent_pipe.send(('data', client_object

2113

.__getattribute__(attrname)))

2159

parent_pipe.send((

2160

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

2114

2161

2115

2162

if command == 'setattr':

2116

2163

attrname = request[1]

2147

2194

# avoid excessive use of external libraries.

2148

2195

2149

2196

# 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

2197

Token = collections.namedtuple("Token", (

2198

"regexp", # To match token; if "value" is not None, must have

2199

# a "group" containing digits

2200

"value", # datetime.timedelta or None

2201

"followers")) # Tokens valid after this token

2159

2202

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

2160

2203

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

2161

2204

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

2162

2205

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

2163

2206

datetime.timedelta(seconds=1),

2164

frozenset((token_end,)))

2207

frozenset((token_end, )))

2165

2208

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

2166

2209

datetime.timedelta(minutes=1),

2167

2210

frozenset((token_second, token_end)))

2183

2226

frozenset((token_month, token_end)))

2184

2227

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

2185

2228

datetime.timedelta(weeks=1),

2186

frozenset((token_end,)))

2229

frozenset((token_end, )))

2187

2230

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

2188

2231

frozenset((token_year, token_month,

2189

2232

token_day, token_time,

2190

token_week))),

2233

token_week)))

2191

2234

# Define starting values

2192

2235

value = datetime.timedelta() # Value so far

2193

2236

found_token = None

2194

followers = frozenset(token_duration,) # Following valid tokens

2237

followers = frozenset((token_duration, )) # Following valid tokens

2195

2238

s = duration # String left to parse

2196

2239

# Loop until end token is found

2197

2240

while found_token is not token_end:

2214

2257

break

2215

2258

else:

2216

2259

# No currently valid tokens were found

2217

raise ValueError("Invalid RFC 3339 duration")

2260

raise ValueError("Invalid RFC 3339 duration: {!r}"

2261

.format(duration))

2218

2262

# End token found

2219

2263

return value

2220

2264

2244

2288

timevalue = datetime.timedelta(0)

2245

2289

for s in interval.split():

2246

2290

try:

2247

suffix = unicode(s[-1])

2291

suffix = s[-1]

2248

2292

value = int(s[:-1])

2249

2293

if suffix == "d":

2250

2294

delta = datetime.timedelta(value)

2257

2301

elif suffix == "w":

2258

2302

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

2259

2303

else:

2260

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

2261

.format(suffix))

2304

raise ValueError("Unknown suffix {!r}".format(suffix))

2262

2305

except IndexError as e:

2263

2306

raise ValueError(*(e.args))

2264

2307

timevalue += delta

2281

2324

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

2282

2325

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

2283

2326

raise OSError(errno.ENODEV,

2284

"{0} not a character device"

2327

"{} not a character device"

2285

2328

.format(os.devnull))

2286

2329

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

2287

2330

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

2297

2340

2298

2341

parser = argparse.ArgumentParser()

2299

2342

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

2300

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

2343

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

2301

2344

help="show version number and exit")

2302

2345

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

2303

2346

help="Bind to interface IF")

2336

2379

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

2337

2380

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

2338

2381

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

2382

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

2383

dest="zeroconf", help="Do not use Zeroconf",

2384

default=None)

2339

2385

2340

2386

options = parser.parse_args()

2341

2387

2342

2388

if options.check:

2343

2389

import doctest

2344

doctest.testmod()

2345

sys.exit()

2390

fail_count, test_count = doctest.testmod()

2391

sys.exit(os.EX_OK if fail_count == 0 else 1)

2346

2392

2347

2393

# Default values for config file for server-global settings

2348

2394

server_defaults = { "interface": "",

2350

2396

"port": "",

2351

2397

"debug": "False",

2352

2398

"priority":

2353

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

2399

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

2400

":+SIGN-DSA-SHA256",

2354

2401

"servicename": "Mandos",

2355

2402

"use_dbus": "True",

2356

2403

"use_ipv6": "True",

2359

2406

"socket": "",

2360

2407

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

2361

2408

"foreground": "False",

2362

}

2409

"zeroconf": "True",

2410

}

2363

2411

2364

2412

# Parse config file for server-global settings

2365

2413

server_config = configparser.SafeConfigParser(server_defaults)

2366

2414

del server_defaults

2367

server_config.read(os.path.join(options.configdir,

2368

"mandos.conf"))

2415

server_config.read(os.path.join(options.configdir, "mandos.conf"))

2369

2416

# Convert the SafeConfigParser object to a dict

2370

2417

server_settings = server_config.defaults()

2371

2418

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

2389

2436

# Override the settings from the config file with command line

2390

2437

# options, if set.

2391

2438

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

2392

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

2393

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

2394

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

2439

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

2440

"use_ipv6", "debuglevel", "restore", "statedir",

2441

"socket", "foreground", "zeroconf"):

2395

2442

value = getattr(options, option)

2396

2443

if value is not None:

2397

2444

server_settings[option] = value

2398

2445

del options

2399

2446

# Force all strings to be unicode

2400

2447

for option in server_settings.keys():

2401

if type(server_settings[option]) is str:

2402

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

2448

if isinstance(server_settings[option], bytes):

2449

server_settings[option] = (server_settings[option]

2450

.decode("utf-8"))

2403

2451

# Force all boolean options to be boolean

2404

2452

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

2405

"foreground"):

2453

"foreground", "zeroconf"):

2406

2454

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

2407

2455

# Debug implies foreground

2408

2456

if server_settings["debug"]:

2411

2459

2412

2460

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

2413

2461

2462

if (not server_settings["zeroconf"]

2463

and not (server_settings["port"]

2464

or server_settings["socket"] != "")):

2465

parser.error("Needs port or socket to work without Zeroconf")

2466

2414

2467

# For convenience

2415

2468

debug = server_settings["debug"]

2416

2469

debuglevel = server_settings["debuglevel"]

2419

2472

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

2420

2473

stored_state_file)

2421

2474

foreground = server_settings["foreground"]

2475

zeroconf = server_settings["zeroconf"]

2422

2476

2423

2477

if debug:

2424

2478

initlogger(debug, logging.DEBUG)

2430

2484

initlogger(debug, level)

2431

2485

2432

2486

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

2433

syslogger.setFormatter(logging.Formatter

2434

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

2435

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

2436

.format(server_settings

2437

["servicename"])))

2487

syslogger.setFormatter(

2488

logging.Formatter('Mandos ({}) [%(process)d]:'

2489

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

2490

server_settings["servicename"])))

2438

2491

2439

2492

# Parse config file with clients

2440

2493

client_config = configparser.SafeConfigParser(Client

2445

2498

global mandos_dbus_service

2446

2499

mandos_dbus_service = None

2447

2500

2448

tcp_server = MandosServer((server_settings["address"],

2449

server_settings["port"]),

2450

ClientHandler,

2451

interface=(server_settings["interface"]

2452

or None),

2453

use_ipv6=use_ipv6,

2454

gnutls_priority=

2455

server_settings["priority"],

2456

use_dbus=use_dbus,

2457

socketfd=(server_settings["socket"]

2458

or None))

2501

socketfd = None

2502

if server_settings["socket"] != "":

2503

socketfd = server_settings["socket"]

2504

tcp_server = MandosServer(

2505

(server_settings["address"], server_settings["port"]),

2506

ClientHandler,

2507

interface=(server_settings["interface"] or None),

2508

use_ipv6=use_ipv6,

2509

gnutls_priority=server_settings["priority"],

2510

use_dbus=use_dbus,

2511

socketfd=socketfd)

2459

2512

if not foreground:

2460

2513

pidfilename = "/run/mandos.pid"

2461

2514

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

2462

2515

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

2463

2516

pidfile = None

2464

2517

try:

2465

pidfile = open(pidfilename, "w")

2518

pidfile = codecs.open(pidfilename, "w", encoding="utf-8")

2466

2519

except IOError as e:

2467

2520

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

2468

2521

exc_info=e)

2495

2548

def debug_gnutls(level, string):

2496

2549

logger.debug("GnuTLS: %s", string[:-1])

2497

2550

2498

(gnutls.library.functions

2499

.gnutls_global_set_log_function(debug_gnutls))

2551

gnutls.library.functions.gnutls_global_set_log_function(

2552

debug_gnutls)

2500

2553

2501

2554

# Redirect stdin so all checkers get /dev/null

2502

2555

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

2522

2575

if use_dbus:

2523

2576

try:

2524

2577

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

2525

bus, do_not_queue=True)

2526

old_bus_name = (dbus.service.BusName

2527

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

2528

do_not_queue=True))

2529

except dbus.exceptions.NameExistsException as e:

2578

bus,

2579

do_not_queue=True)

2580

old_bus_name = dbus.service.BusName(

2581

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

2582

do_not_queue=True)

2583

except dbus.exceptions.DBusException as e:

2530

2584

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

2531

2585

use_dbus = False

2532

2586

server_settings["use_dbus"] = False

2533

2587

tcp_server.use_dbus = False

2534

protocol = avahi.PROTO_INET6 if use_ipv6 else avahi.PROTO_INET

2535

service = AvahiServiceToSyslog(name =

2536

server_settings["servicename"],

2537

servicetype = "_mandos._tcp",

2538

protocol = protocol, bus = bus)

2539

if server_settings["interface"]:

2540

service.interface = (if_nametoindex

2541

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

2588

if zeroconf:

2589

protocol = avahi.PROTO_INET6 if use_ipv6 else avahi.PROTO_INET

2590

service = AvahiServiceToSyslog(

2591

name = server_settings["servicename"],

2592

servicetype = "_mandos._tcp",

2593

protocol = protocol,

2594

bus = bus)

2595

if server_settings["interface"]:

2596

service.interface = if_nametoindex(

2597

server_settings["interface"].encode("utf-8"))

2542

2598

2543

2599

global multiprocessing_manager

2544

2600

multiprocessing_manager = multiprocessing.Manager()

2563

2619

if server_settings["restore"]:

2564

2620

try:

2565

2621

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

2566

clients_data, old_client_settings = (pickle.load

2567

(stored_state))

2622

clients_data, old_client_settings = pickle.load(

2623

stored_state)

2568

2624

os.remove(stored_state_path)

2569

2625

except IOError as e:

2570

2626

if e.errno == errno.ENOENT:

2571

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

2572

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

2627

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

2628

" {}".format(os.strerror(e.errno)))

2573

2629

else:

2574

2630

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

2575

2631

exc_info=e)

2576

2632

raise

2577

2633

except EOFError as e:

2578

2634

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

2579

"EOFError:", exc_info=e)

2635

"EOFError:",

2636

exc_info=e)

2580

2637

2581

2638

with PGPEngine() as pgp:

2582

for client_name, client in clients_data.iteritems():

2639

for client_name, client in clients_data.items():

2583

2640

# Skip removed clients

2584

2641

if client_name not in client_settings:

2585

2642

continue

2594

2651

# For each value in new config, check if it

2595

2652

# differs from the old config value (Except for

2596

2653

# the "secret" attribute)

2597

if (name != "secret" and

2598

value != old_client_settings[client_name]

2599

[name]):

2654

if (name != "secret"

2655

and (value !=

2656

old_client_settings[client_name][name])):

2600

2657

client[name] = value

2601

2658

except KeyError:

2602

2659

pass

2603

2660

2604

2661

# Clients who has passed its expire date can still be

2605

# enabled if its last checker was successful. Clients

2662

# enabled if its last checker was successful. A Client

2606

2663

# whose checker succeeded before we stored its state is

2607

2664

# assumed to have successfully run all checkers during

2608

2665

# downtime.

2610

2667

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

2611

2668

if not client["last_checked_ok"]:

2612

2669

logger.warning(

2613

"disabling client {0} - Client never "

2614

"performed a successful checker"

2615

.format(client_name))

2670

"disabling client {} - Client never "

2671

"performed a successful checker".format(

2672

client_name))

2616

2673

client["enabled"] = False

2617

2674

elif client["last_checker_status"] != 0:

2618

2675

logger.warning(

2619

"disabling client {0} - Client "

2620

"last checker failed with error code {1}"

2621

.format(client_name,

2622

client["last_checker_status"]))

2676

"disabling client {} - Client last"

2677

" checker failed with error code"

2678

" {}".format(

2679

client_name,

2680

client["last_checker_status"]))

2623

2681

client["enabled"] = False

2624

2682

else:

2625

client["expires"] = (datetime.datetime

2626

.utcnow()

2627

+ client["timeout"])

2683

client["expires"] = (

2684

datetime.datetime.utcnow()

2685

+ client["timeout"])

2628

2686

logger.debug("Last checker succeeded,"

2629

" keeping {0} enabled"

2630

.format(client_name))

2687

" keeping {} enabled".format(

2688

client_name))

2631

2689

try:

2632

client["secret"] = (

2633

pgp.decrypt(client["encrypted_secret"],

2634

client_settings[client_name]

2635

["secret"]))

2690

client["secret"] = pgp.decrypt(

2691

client["encrypted_secret"],

2692

client_settings[client_name]["secret"])

2636

2693

except PGPError:

2637

2694

# If decryption fails, we use secret from new settings

2638

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

2639

.format(client_name))

2640

client["secret"] = (

2641

client_settings[client_name]["secret"])

2695

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

2696

client_name))

2697

client["secret"] = (client_settings[client_name]

2698

["secret"])

2642

2699

2643

2700

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

2644

2701

for client_name in (set(old_client_settings)

2649

2706

clients_data[client_name] = client_settings[client_name]

2650

2707

2651

2708

# Create all client objects

2652

for client_name, client in clients_data.iteritems():

2709

for client_name, client in clients_data.items():

2653

2710

tcp_server.clients[client_name] = client_class(

2654

name = client_name, settings = client,

2711

name = client_name,

2712

settings = client,

2655

2713

server_settings = server_settings)

2656

2714

2657

2715

if not tcp_server.clients:

2659

2717

2660

2718

if not foreground:

2661

2719

if pidfile is not None:

2720

pid = os.getpid()

2662

2721

try:

2663

2722

with pidfile:

2664

pid = os.getpid()

2665

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

2723

print(pid, file=pidfile)

2666

2724

except IOError:

2667

2725

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

2668

2726

pidfilename, pid)

2673

2731

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

2674

2732

2675

2733

if use_dbus:

2676

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

2677

"se.bsnet.fukt.Mandos"})

2734

2735

@alternate_dbus_interfaces(

2736

{ "se.recompile.Mandos": "se.bsnet.fukt.Mandos" })

2678

2737

class MandosDBusService(DBusObjectWithProperties):

2679

2738

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

2739

2680

2740

def __init__(self):

2681

2741

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

2742

2682

2743

_interface = "se.recompile.Mandos"

2683

2744

2684

2745

@dbus_interface_annotations(_interface)

2685

2746

def _foo(self):

2686

return { "org.freedesktop.DBus.Property"

2687

".EmitsChangedSignal":

2688

"false"}

2747

return {

2748

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

2749

"false" }

2689

2750

2690

2751

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

2691

2752

def ClientAdded(self, objpath):

2705

2766

@dbus.service.method(_interface, out_signature="ao")

2706

2767

def GetAllClients(self):

2707

2768

"D-Bus method"

2708

return dbus.Array(c.dbus_object_path

2709

for c in

2769

return dbus.Array(c.dbus_object_path for c in

2710

2770

tcp_server.clients.itervalues())

2711

2771

2712

2772

@dbus.service.method(_interface,

2714

2774

def GetAllClientsWithProperties(self):

2715

2775

"D-Bus method"

2716

2776

return dbus.Dictionary(

2717

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

2718

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

2777

{ c.dbus_object_path: c.GetAll("")

2778

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

2719

2779

signature="oa{sv}")

2720

2780

2721

2781

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

2738

2798

2739

2799

def cleanup():

2740

2800

"Cleanup function; run on exit"

2741

service.cleanup()

2801

if zeroconf:

2802

service.cleanup()

2742

2803

2743

2804

multiprocessing.active_children()

2744

2805

wnull.close()

2758

2819

2759

2820

# A list of attributes that can not be pickled

2760

2821

# + secret.

2761

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

2762

"checker", "server_settings"))

2763

for name, typ in (inspect.getmembers

2764

(dbus.service.Object)):

2822

exclude = { "bus", "changedstate", "secret",

2823

"checker", "server_settings" }

2824

for name, typ in inspect.getmembers(dbus.service

2825

.Object):

2765

2826

exclude.add(name)

2766

2827

2767

2828

client_dict["encrypted_secret"] = (client

2774

2835

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

2775

2836

2776

2837

try:

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:

2838

with tempfile.NamedTemporaryFile(

2839

mode='wb',

2840

suffix=".pickle",

2841

prefix='clients-',

2842

dir=os.path.dirname(stored_state_path),

2843

delete=False) as stored_state:

2781

2844

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

2782

tempname=stored_state.name

2845

tempname = stored_state.name

2783

2846

os.rename(tempname, stored_state_path)

2784

2847

except (IOError, OSError) as e:

2785

2848

if not debug:

2788

2851

except NameError:

2789

2852

pass

2790

2853

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

2791

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

2854

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

2792

2855

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

2793

2856

else:

2794

2857

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

2804

2867

client.disable(quiet=True)

2805

2868

if use_dbus:

2806

2869

# Emit D-Bus signal

2807

mandos_dbus_service.ClientRemoved(client

2808

.dbus_object_path,

2809

client.name)

2870

mandos_dbus_service.ClientRemoved(

2871

client.dbus_object_path, client.name)

2810

2872

client_settings.clear()

2811

2873

2812

2874

atexit.register(cleanup)

2823

2885

tcp_server.server_activate()

2824

2886

2825

2887

# Find out what port we got

2826

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

2888

if zeroconf:

2889

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

2827

2890

if use_ipv6:

2828

2891

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

2829

2892

" flowinfo %d, scope_id %d",

2835

2898

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

2836

2899

2837

2900

try:

2838

# From the Avahi example code

2839

try:

2840

service.activate()

2841

except dbus.exceptions.DBusException as error:

2842

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

2843

cleanup()

2844

sys.exit(1)

2845

# End of Avahi example code

2901

if zeroconf:

2902

# From the Avahi example code

2903

try:

2904

service.activate()

2905

except dbus.exceptions.DBusException as error:

2906

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

2907

cleanup()

2908

sys.exit(1)

2909

# End of Avahi example code

2846

2910

2847

2911

gobject.io_add_watch(tcp_server.fileno(), gobject.IO_IN,

2848

2912

lambda *args, **kwargs:

2863

2927

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

2864

2928

cleanup()

2865

2929

2930

2866

2931

if __name__ == '__main__':

2867

2932

main()