/mandos/release : revision 237.7.174

1

#!/usr/bin/python2.7

1

#!/usr/bin/python

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

try:

40

import SocketServer as socketserver

41

except ImportError:

42

import socketserver

39

import SocketServer as socketserver

43

40

import socket

44

41

import argparse

45

42

import datetime

50

47

import gnutls.library.functions

51

48

import gnutls.library.constants

52

49

import gnutls.library.types

53

try:

54

import ConfigParser as configparser

55

except ImportError:

56

import configparser

50

import ConfigParser as configparser

57

51

import sys

58

52

import re

59

53

import os

68

62

import struct

69

63

import fcntl

70

64

import functools

71

try:

72

import cPickle as pickle

73

except ImportError:

74

import pickle

65

import cPickle as pickle

75

66

import multiprocessing

76

67

import types

77

68

import binascii

78

69

import tempfile

79

70

import itertools

80

71

import collections

81

import codecs

82

72

83

73

import dbus

84

74

import dbus.service

85

try:

86

import gobject

87

except ImportError:

88

from gi.repository import GObject as gobject

75

import gobject

89

76

import avahi

90

77

from dbus.mainloop.glib import DBusGMainLoop

91

78

import ctypes

101

88

except ImportError:

102

89

SO_BINDTODEVICE = None

103

90

104

if sys.version_info.major == 2:

105

str = unicode

106

107

version = "1.6.9"

91

version = "1.6.1"

108

92

stored_state_file = "clients.pickle"

109

93

110

94

logger = logging.getLogger()

111

syslogger = None

95

syslogger = (logging.handlers.SysLogHandler

96

(facility = logging.handlers.SysLogHandler.LOG_DAEMON,

97

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

112

98

113

99

try:

114

if_nametoindex = ctypes.cdll.LoadLibrary(

115

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

100

if_nametoindex = (ctypes.cdll.LoadLibrary

101

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

102

.if_nametoindex)

116

103

except (OSError, AttributeError):

117

118

104

def if_nametoindex(interface):

119

105

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

120

106

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

121

107

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

122

108

ifreq = fcntl.ioctl(s, SIOCGIFINDEX,

123

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

124

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

109

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

110

interface))

111

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

112

ifreq[16:20])[0]

125

113

return interface_index

126

114

127

115

128

116

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

129

117

"""init logger and add loglevel"""

130

118

131

global syslogger

132

syslogger = (logging.handlers.SysLogHandler(

133

facility = logging.handlers.SysLogHandler.LOG_DAEMON,

134

address = "/dev/log"))

135

119

syslogger.setFormatter(logging.Formatter

136

120

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

137

121

' %(message)s'))

154

138

155

139

class PGPEngine(object):

156

140

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

157

158

141

def __init__(self):

159

142

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

160

143

self.gnupgargs = ['--batch',

189

172

def password_encode(self, password):

190

173

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

191

174

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

192

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

193

if len(encoded) > 2048:

194

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

195

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

196

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

197

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

198

return encoded

175

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

199

176

200

177

def encrypt(self, data, password):

201

178

passphrase = self.password_encode(password)

202

with tempfile.NamedTemporaryFile(

203

dir=self.tempdir) as passfile:

179

with tempfile.NamedTemporaryFile(dir=self.tempdir

180

) as passfile:

204

181

passfile.write(passphrase)

205

182

passfile.flush()

206

183

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

217

194

218

195

def decrypt(self, data, password):

219

196

passphrase = self.password_encode(password)

220

with tempfile.NamedTemporaryFile(

221

dir = self.tempdir) as passfile:

197

with tempfile.NamedTemporaryFile(dir = self.tempdir

198

) as passfile:

222

199

passfile.write(passphrase)

223

200

passfile.flush()

224

201

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

228

205

stdin = subprocess.PIPE,

229

206

stdout = subprocess.PIPE,

230

207

stderr = subprocess.PIPE)

231

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

208

decrypted_plaintext, err = proc.communicate(input

209

= data)

232

210

if proc.returncode != 0:

233

211

raise PGPError(err)

234

212

return decrypted_plaintext

237

215

class AvahiError(Exception):

238

216

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

239

217

self.value = value

240

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

241

**kwargs)

242

218

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

219

def __unicode__(self):

220

return unicode(repr(self.value))

243

221

244

222

class AvahiServiceError(AvahiError):

245

223

pass

246

224

247

248

225

class AvahiGroupError(AvahiError):

249

226

pass

250

227

270

247

bus: dbus.SystemBus()

271

248

"""

272

249

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):

250

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

251

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

252

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

253

protocol = avahi.PROTO_UNSPEC, bus = None):

284

254

self.interface = interface

285

255

self.name = name

286

256

self.type = servicetype

296

266

self.bus = bus

297

267

self.entry_group_state_changed_match = None

298

268

299

def rename(self, remove=True):

269

def rename(self):

300

270

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

301

271

if self.rename_count >= self.max_renames:

302

272

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

303

273

" after %i retries, exiting.",

304

274

self.rename_count)

305

275

raise AvahiServiceError("Too many renames")

306

self.name = str(

307

self.server.GetAlternativeServiceName(self.name))

308

self.rename_count += 1

276

self.name = unicode(self.server

277

.GetAlternativeServiceName(self.name))

309

278

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

310

279

self.name)

311

if remove:

312

self.remove()

280

self.remove()

313

281

try:

314

282

self.add()

315

283

except dbus.exceptions.DBusException as error:

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)

284

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

285

self.cleanup()

286

os._exit(1)

287

self.rename_count += 1

324

288

325

289

def remove(self):

326

290

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

364

328

self.rename()

365

329

elif state == avahi.ENTRY_GROUP_FAILURE:

366

330

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

367

str(error))

368

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

331

unicode(error))

332

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

333

.format(error))

369

334

370

335

def cleanup(self):

371

336

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

381

346

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

382

347

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

383

348

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

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

}

349

bad_states = { avahi.SERVER_INVALID:

350

"Zeroconf server invalid",

351

avahi.SERVER_REGISTERING: None,

352

avahi.SERVER_COLLISION:

353

"Zeroconf server name collision",

354

avahi.SERVER_FAILURE:

355

"Zeroconf server failure" }

390

356

if state in bad_states:

391

357

if bad_states[state] is not None:

392

358

if error is None:

411

377

follow_name_owner_changes=True),

412

378

avahi.DBUS_INTERFACE_SERVER)

413

379

self.server.connect_to_signal("StateChanged",

414

self.server_state_changed)

380

self.server_state_changed)

415

381

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

416

382

417

383

418

384

class AvahiServiceToSyslog(AvahiService):

419

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

385

def rename(self):

420

386

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

421

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

422

syslogger.setFormatter(logging.Formatter(

423

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

424

.format(self.name)))

387

ret = AvahiService.rename(self)

388

syslogger.setFormatter(logging.Formatter

389

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

390

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

391

.format(self.name)))

425

392

return ret

426

393

427

def call_pipe(connection, # : multiprocessing.Connection

428

func, *args, **kwargs):

429

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

430

431

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

432

return value on the provided multiprocessing.Connection.

433

"""

434

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

435

connection.close()

394

395

def timedelta_to_milliseconds(td):

396

"Convert a datetime.timedelta() to milliseconds"

397

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

398

+ (td.seconds * 1000)

399

+ (td.microseconds // 1000))

400

436

401

437

402

class Client(object):

438

403

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

465

430

last_checker_status: integer between 0 and 255 reflecting exit

466

431

status of last checker. -1 reflects crashed

467

432

checker, -2 means no checker completed yet.

468

last_checker_signal: The signal which killed the last checker, if

469

last_checker_status is -1

470

433

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

471

434

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

472

435

D-Bus identifiers

485

448

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

486

449

"last_approval_request", "last_checked_ok",

487

450

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

488

client_defaults = {

489

"timeout": "PT5M",

490

"extended_timeout": "PT15M",

491

"interval": "PT2M",

492

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

493

"host": "",

494

"approval_delay": "PT0S",

495

"approval_duration": "PT1S",

496

"approved_by_default": "True",

497

"enabled": "True",

498

}

451

client_defaults = { "timeout": "PT5M",

452

"extended_timeout": "PT15M",

453

"interval": "PT2M",

454

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

455

"host": "",

456

"approval_delay": "PT0S",

457

"approval_duration": "PT1S",

458

"approved_by_default": "True",

459

"enabled": "True",

460

}

461

462

def timeout_milliseconds(self):

463

"Return the 'timeout' attribute in milliseconds"

464

return timedelta_to_milliseconds(self.timeout)

465

466

def extended_timeout_milliseconds(self):

467

"Return the 'extended_timeout' attribute in milliseconds"

468

return timedelta_to_milliseconds(self.extended_timeout)

469

470

def interval_milliseconds(self):

471

"Return the 'interval' attribute in milliseconds"

472

return timedelta_to_milliseconds(self.interval)

473

474

def approval_delay_milliseconds(self):

475

return timedelta_to_milliseconds(self.approval_delay)

499

476

500

477

@staticmethod

501

478

def config_parser(config):

517

494

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

518

495

"enabled")

519

496

520

# Uppercase and remove spaces from fingerprint for later

521

# comparison purposes with return value from the

522

# fingerprint() function

523

497

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

524

498

.replace(" ", ""))

525

499

if "secret" in section:

530

504

"rb") as secfile:

531

505

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

532

506

else:

533

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

507

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

534

508

.format(section))

535

509

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

536

510

client["extended_timeout"] = string_to_delta(

553

527

server_settings = {}

554

528

self.server_settings = server_settings

555

529

# adding all client settings

556

for setting, value in settings.items():

530

for setting, value in settings.iteritems():

557

531

setattr(self, setting, value)

558

532

559

533

if self.enabled:

567

541

self.expires = None

568

542

569

543

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

544

# Uppercase and remove spaces from fingerprint for later

545

# comparison purposes with return value from the fingerprint()

546

# function

570

547

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

571

548

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

572

549

datetime.datetime.utcnow())

579

556

self.current_checker_command = None

580

557

self.approved = None

581

558

self.approvals_pending = 0

582

self.changedstate = multiprocessing_manager.Condition(

583

multiprocessing_manager.Lock())

584

self.client_structure = [attr

585

for attr in self.__dict__.iterkeys()

559

self.changedstate = (multiprocessing_manager

560

.Condition(multiprocessing_manager

561

.Lock()))

562

self.client_structure = [attr for attr in

563

self.__dict__.iterkeys()

586

564

if not attr.startswith("_")]

587

565

self.client_structure.append("client_structure")

588

566

589

for name, t in inspect.getmembers(

590

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

567

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

568

lambda obj:

569

isinstance(obj,

570

property)):

591

571

if not name.startswith("_"):

592

572

self.client_structure.append(name)

593

573

635

615

# and every interval from then on.

636

616

if self.checker_initiator_tag is not None:

637

617

gobject.source_remove(self.checker_initiator_tag)

638

self.checker_initiator_tag = gobject.timeout_add(

639

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

640

self.start_checker)

618

self.checker_initiator_tag = (gobject.timeout_add

619

(self.interval_milliseconds(),

620

self.start_checker))

641

621

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

642

622

if self.disable_initiator_tag is not None:

643

623

gobject.source_remove(self.disable_initiator_tag)

644

self.disable_initiator_tag = gobject.timeout_add(

645

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

624

self.disable_initiator_tag = (gobject.timeout_add

625

(self.timeout_milliseconds(),

626

self.disable))

646

627

# Also start a new checker *right now*.

647

628

self.start_checker()

648

629

649

def checker_callback(self, source, condition, connection,

650

command):

630

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

651

631

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

652

632

self.checker_callback_tag = None

653

633

self.checker = None

654

# Read return code from connection (see call_pipe)

655

returncode = connection.recv()

656

connection.close()

657

658

if returncode >= 0:

659

self.last_checker_status = returncode

660

self.last_checker_signal = None

634

if os.WIFEXITED(condition):

635

self.last_checker_status = os.WEXITSTATUS(condition)

661

636

if self.last_checker_status == 0:

662

637

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

663

638

vars(self))

664

639

self.checked_ok()

665

640

else:

666

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

641

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

642

vars(self))

667

643

else:

668

644

self.last_checker_status = -1

669

self.last_checker_signal = -returncode

670

645

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

671

646

vars(self))

672

return False

673

647

674

648

def checked_ok(self):

675

649

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

676

650

self.last_checked_ok = datetime.datetime.utcnow()

677

651

self.last_checker_status = 0

678

self.last_checker_signal = None

679

652

self.bump_timeout()

680

653

681

654

def bump_timeout(self, timeout=None):

686

659

gobject.source_remove(self.disable_initiator_tag)

687

660

self.disable_initiator_tag = None

688

661

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

689

self.disable_initiator_tag = gobject.timeout_add(

690

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

662

self.disable_initiator_tag = (gobject.timeout_add

663

(timedelta_to_milliseconds

664

(timeout), self.disable))

691

665

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

692

666

693

667

def need_approval(self):

707

681

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

708

682

# should be.

709

683

710

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

711

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

712

self.checker.join()

713

self.checker = None

684

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

685

try:

686

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

687

except (AttributeError, OSError) as error:

688

if (isinstance(error, OSError)

689

and error.errno != errno.ECHILD):

690

raise error

691

else:

692

if pid:

693

logger.warning("Checker was a zombie")

694

gobject.source_remove(self.checker_callback_tag)

695

self.checker_callback(pid, status,

696

self.current_checker_command)

714

697

# Start a new checker if needed

715

698

if self.checker is None:

716

699

# Escape attributes for the shell

717

escaped_attrs = {

718

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

719

for attr in self.runtime_expansions }

700

escaped_attrs = dict(

701

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

702

for attr in

703

self.runtime_expansions)

720

704

try:

721

705

command = self.checker_command % escaped_attrs

722

706

except TypeError as error:

723

707

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

724

self.checker_command,

708

self.checker_command, exc_info=error)

709

return True # Try again later

710

self.current_checker_command = command

711

try:

712

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

713

command, self.name)

714

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

715

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

716

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

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 })

726

self.checker = subprocess.Popen(command,

727

close_fds=True,

728

shell=True, cwd="/",

729

**popen_args)

730

except OSError as error:

731

logger.error("Failed to start subprocess",

725

732

exc_info=error)

726

return True # Try again later

727

self.current_checker_command = command

728

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

729

self.name)

730

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

731

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

732

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

733

# always replaced by /dev/null.)

734

# The exception is when not debugging but nevertheless

735

# running in the foreground; use the previously

736

# created wnull.

737

popen_args = { "close_fds": True,

738

"shell": True,

739

"cwd": "/" }

740

if (not self.server_settings["debug"]

741

and self.server_settings["foreground"]):

742

popen_args.update({"stdout": wnull,

743

"stderr": wnull })

744

pipe = multiprocessing.Pipe(duplex = False)

745

self.checker = multiprocessing.Process(

746

target = call_pipe,

747

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

748

kwargs = popen_args)

749

self.checker.start()

750

self.checker_callback_tag = gobject.io_add_watch(

751

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

752

self.checker_callback, pipe[0], command)

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:

741

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

742

except OSError as 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)

753

752

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

754

753

return True

755

754

761

760

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

762

761

return

763

762

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

764

self.checker.terminate()

763

try:

764

self.checker.terminate()

765

#time.sleep(0.5)

766

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

767

# self.checker.kill()

768

except OSError as error:

769

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

770

raise

765

771

self.checker = None

766

772

767

773

768

def dbus_service_property(dbus_interface,

769

signature="v",

770

access="readwrite",

771

byte_arrays=False):

774

def dbus_service_property(dbus_interface, signature="v",

775

access="readwrite", byte_arrays=False):

772

776

"""Decorators for marking methods of a DBusObjectWithProperties to

773

777

become properties on the D-Bus.

774

778

783

787

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

784

788

if byte_arrays and signature != "ay":

785

789

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

786

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

787

790

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

788

791

def decorator(func):

789

792

func._dbus_is_property = True

790

793

func._dbus_interface = dbus_interface

795

798

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

796

799

func._dbus_get_args_options = {'byte_arrays': byte_arrays }

797

800

return func

798

799

801

return decorator

800

802

801

803

810

812

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

811

813

"false"}

812

814

"""

813

814

815

def decorator(func):

815

816

func._dbus_is_interface = True

816

817

func._dbus_interface = dbus_interface

817

818

func._dbus_name = dbus_interface

818

819

return func

819

820

return decorator

821

822

824

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

825

Usage:

826

827

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

828

"org.freedesktop.DBus.Property."

829

"EmitsChangedSignal": "false"})

830

827

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

831

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

836

835

def decorator(func):

837

836

func._dbus_annotations = annotations

838

837

return func

839

840

838

return decorator

841

839

842

840

843

841

class DBusPropertyException(dbus.exceptions.DBusException):

844

842

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

845

843

"""

846

pass

844

def __unicode__(self):

845

return unicode(str(self))

847

846

848

847

849

848

class DBusPropertyAccessException(DBusPropertyException):

873

872

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

874

873

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

875

874

"""

876

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

875

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

877

876

False)

878

877

879

878

def _get_all_dbus_things(self, thing):

880

879

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

881

880

"""

882

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

881

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

882

name),

883

athing.__get__(self))

884

for cls in self.__class__.__mro__

885

for name, athing in

886

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

886

inspect.getmembers(cls,

887

self._is_dbus_thing(thing)))

887

888

889

def _get_dbus_property(self, interface_name, property_name):

889

890

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

890

891

property with the specified name and interface.

891

892

"""

892

for cls in self.__class__.__mro__:

893

for name, value in inspect.getmembers(

894

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

893

for cls in self.__class__.__mro__:

894

for name, value in (inspect.getmembers

895

(cls,

896

self._is_dbus_thing("property"))):

895

897

if (value._dbus_name == property_name

896

898

and value._dbus_interface == interface_name):

897

899

return value.__get__(self)

898

900

899

901

# No such property

900

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

901

self.dbus_object_path, interface_name, property_name))

902

raise DBusPropertyNotFound(self.dbus_object_path + ":"

903

+ interface_name + "."

904

+ property_name)

902

905

903

@dbus.service.method(dbus.PROPERTIES_IFACE,

904

in_signature="ss",

906

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

905

907

out_signature="v")

906

908

def Get(self, interface_name, property_name):

907

909

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

925

927

# The byte_arrays option is not supported yet on

926

928

# signatures other than "ay".

927

929

if prop._dbus_signature != "ay":

928

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

929

"'ay' signature {!r}"

930

.format(prop._dbus_signature))

930

raise ValueError

931

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

932

for byte in value))

933

prop(value)

934

935

@dbus.service.method(dbus.PROPERTIES_IFACE,

936

in_signature="s",

935

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

937

936

out_signature="a{sv}")

938

937

def GetAll(self, interface_name):

939

938

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

954

953

if not hasattr(value, "variant_level"):

955

954

properties[name] = value

956

955

continue

957

properties[name] = type(value)(

958

value, variant_level = value.variant_level + 1)

956

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

957

value.variant_level+1)

959

958

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

960

959

961

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

962

def PropertiesChanged(self, interface_name, changed_properties,

963

invalidated_properties):

964

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

965

standard.

966

"""

967

pass

968

969

960

@dbus.service.method(dbus.INTROSPECTABLE_IFACE,

970

961

out_signature="s",

971

962

path_keyword='object_path',

979

970

connection)

980

971

try:

981

972

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

982

983

973

def make_tag(document, name, prop):

984

974

e = document.createElement("property")

985

975

e.setAttribute("name", name)

986

976

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

987

977

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

988

978

return e

989

990

979

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

991

980

# Add property tags

992

981

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

1004

993

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

1005

994

and prop._dbus_interface

1006

995

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

1007

annots.update(getattr(

1008

prop, "_dbus_annotations", {}))

1009

for name, value in annots.items():

996

annots.update(getattr

997

(prop,

998

"_dbus_annotations",

999

{}))

1000

for name, value in annots.iteritems():

1010

1001

ann_tag = document.createElement(

1011

1002

"annotation")

1012

1003

ann_tag.setAttribute("name", name)

1015

1006

# Add interface annotation tags

1016

1007

for annotation, value in dict(

1017

1008

itertools.chain.from_iterable(

1018

annotations().items()

1019

for name, annotations

1020

in self._get_all_dbus_things("interface")

1009

annotations().iteritems()

1010

for name, annotations in

1011

self._get_all_dbus_things("interface")

1021

1012

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

1022

)).items():

1013

)).iteritems():

1023

1014

ann_tag = document.createElement("annotation")

1024

1015

ann_tag.setAttribute("name", annotation)

1025

1016

ann_tag.setAttribute("value", value)

1052

1043

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

1053

1044

if dt is None:

1054

1045

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

1055

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

1046

return dbus.String(dt.isoformat(),

1047

variant_level=variant_level)

1056

1048

1057

1049

1058

1050

def alternate_dbus_interfaces(alt_interface_names, deprecate=True):

1078

1070

(from DBusObjectWithProperties) and interfaces (from the

1079

1071

dbus_interface_annotations decorator).

1080

1072

"""

1081

1082

1073

def wrapper(cls):

1083

1074

for orig_interface_name, alt_interface_name in (

1084

alt_interface_names.items()):

1075

alt_interface_names.iteritems()):

1085

1076

attr = {}

1086

1077

interface_names = set()

1087

1078

# Go though all attributes of the class

1089

1080

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

1090

1081

# with the wrong interface name

1091

1082

if (not hasattr(attribute, "_dbus_interface")

1092

or not attribute._dbus_interface.startswith(

1093

orig_interface_name)):

1083

or not attribute._dbus_interface

1084

.startswith(orig_interface_name)):

1094

1085

continue

1095

1086

# Create an alternate D-Bus interface name based on

1096

1087

# the current name

1097

alt_interface = attribute._dbus_interface.replace(

1098

orig_interface_name, alt_interface_name)

1088

alt_interface = (attribute._dbus_interface

1089

.replace(orig_interface_name,

1090

alt_interface_name))

1099

1091

interface_names.add(alt_interface)

1100

1092

# Is this a D-Bus signal?

1101

1093

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

1102

if sys.version_info.major == 2:

1103

# Extract the original non-method undecorated

1104

# function by black magic

1105

nonmethod_func = (dict(

1094

# Extract the original non-method undecorated

1095

# function by black magic

1096

nonmethod_func = (dict(

1106

1097

zip(attribute.func_code.co_freevars,

1107

attribute.__closure__))

1108

["func"].cell_contents)

1109

else:

1110

nonmethod_func = attribute

1098

attribute.__closure__))["func"]

1099

.cell_contents)

1111

1100

# Create a new, but exactly alike, function

1112

1101

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

1113

1102

# with the alternate D-Bus interface name

1114

if sys.version_info.major == 2:

1115

new_function = types.FunctionType(

1116

nonmethod_func.func_code,

1117

nonmethod_func.func_globals,

1118

nonmethod_func.func_name,

1119

nonmethod_func.func_defaults,

1120

nonmethod_func.func_closure)

1121

else:

1122

new_function = types.FunctionType(

1123

nonmethod_func.__code__,

1124

nonmethod_func.__globals__,

1125

nonmethod_func.__name__,

1126

nonmethod_func.__defaults__,

1127

nonmethod_func.__closure__)

1128

new_function = (dbus.service.signal(

1129

alt_interface,

1130

attribute._dbus_signature)(new_function))

1103

new_function = (dbus.service.signal

1104

(alt_interface,

1105

attribute._dbus_signature)

1106

(types.FunctionType(

1107

nonmethod_func.func_code,

1108

nonmethod_func.func_globals,

1109

nonmethod_func.func_name,

1110

nonmethod_func.func_defaults,

1111

nonmethod_func.func_closure)))

1131

1112

# Copy annotations, if any

1132

1113

try:

1133

new_function._dbus_annotations = dict(

1134

attribute._dbus_annotations)

1114

new_function._dbus_annotations = (

1115

dict(attribute._dbus_annotations))

1135

1116

except AttributeError:

1136

1117

pass

1137

1118

# Define a creator of a function to call both the

1142

1123

"""This function is a scope container to pass

1143

1124

func1 and func2 to the "call_both" function

1144

1125

outside of its arguments"""

1145

1146

1126

def call_both(*args, **kwargs):

1147

1127

"""This function will emit two D-Bus

1148

1128

signals by calling func1 and func2"""

1149

1129

func1(*args, **kwargs)

1150

1130

func2(*args, **kwargs)

1151

1152

1131

return call_both

1153

1132

# Create the "call_both" function and add it to

1154

1133

# the class

1159

1138

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

1160

1139

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

1161

1140

# to the class.

1162

attr[attrname] = (

1163

dbus.service.method(

1164

alt_interface,

1165

attribute._dbus_in_signature,

1166

attribute._dbus_out_signature)

1167

(types.FunctionType(attribute.func_code,

1168

attribute.func_globals,

1169

attribute.func_name,

1170

attribute.func_defaults,

1171

attribute.func_closure)))

1141

attr[attrname] = (dbus.service.method

1142

(alt_interface,

1143

attribute._dbus_in_signature,

1144

attribute._dbus_out_signature)

1145

(types.FunctionType

1146

(attribute.func_code,

1147

attribute.func_globals,

1148

attribute.func_name,

1149

attribute.func_defaults,

1150

attribute.func_closure)))

1172

1151

# Copy annotations, if any

1173

1152

try:

1174

attr[attrname]._dbus_annotations = dict(

1175

attribute._dbus_annotations)

1153

attr[attrname]._dbus_annotations = (

1154

dict(attribute._dbus_annotations))

1176

1155

except AttributeError:

1177

1156

pass

1178

1157

# Is this a D-Bus property?

1181

1160

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

1182

1161

# property with the alternate D-Bus interface

1183

1162

# name. Add it to the class.

1184

attr[attrname] = (dbus_service_property(

1185

alt_interface, attribute._dbus_signature,

1186

attribute._dbus_access,

1187

attribute._dbus_get_args_options

1188

["byte_arrays"])

1189

(types.FunctionType(

1190

attribute.func_code,

1191

attribute.func_globals,

1192

attribute.func_name,

1193

attribute.func_defaults,

1194

attribute.func_closure)))

1163

attr[attrname] = (dbus_service_property

1164

(alt_interface,

1165

attribute._dbus_signature,

1166

attribute._dbus_access,

1167

attribute

1168

._dbus_get_args_options

1169

["byte_arrays"])

1170

(types.FunctionType

1171

(attribute.func_code,

1172

attribute.func_globals,

1173

attribute.func_name,

1174

attribute.func_defaults,

1175

attribute.func_closure)))

1195

1176

# Copy annotations, if any

1196

1177

try:

1197

attr[attrname]._dbus_annotations = dict(

1198

attribute._dbus_annotations)

1178

attr[attrname]._dbus_annotations = (

1179

dict(attribute._dbus_annotations))

1199

1180

except AttributeError:

1200

1181

pass

1201

1182

# Is this a D-Bus interface?

1204

1185

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

1205

1186

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

1206

1187

# to the class.

1207

attr[attrname] = (

1208

dbus_interface_annotations(alt_interface)

1209

(types.FunctionType(attribute.func_code,

1210

attribute.func_globals,

1211

attribute.func_name,

1212

attribute.func_defaults,

1213

attribute.func_closure)))

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)))

1214

1196

if deprecate:

1215

1197

# Deprecate all alternate interfaces

1216

iname="_AlternateDBusNames_interface_annotation{}"

1198

iname="_AlternateDBusNames_interface_annotation{0}"

1217

1199

for interface_name in interface_names:

1218

1219

1200

@dbus_interface_annotations(interface_name)

1220

1201

def func(self):

1221

1202

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

1222

"true" }

1203

"true" }

1223

1204

# Find an unused name

1224

1205

for aname in (iname.format(i)

1225

1206

for i in itertools.count()):

1229

1210

if interface_names:

1230

1211

# Replace the class with a new subclass of it with

1231

1212

# methods, signals, etc. as created above.

1232

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

1233

(cls, ), attr)

1213

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

1214

(cls,), attr)

1234

1215

return cls

1235

1236

1216

return wrapper

1237

1217

1238

1218

1239

1219

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

1240

"se.bsnet.fukt.Mandos"})

1220

"se.bsnet.fukt.Mandos"})

1241

1221

class ClientDBus(Client, DBusObjectWithProperties):

1242

1222

"""A Client class using D-Bus

1243

1223

1247

1227

"""

1248

1228

1249

1229

runtime_expansions = (Client.runtime_expansions

1250

+ ("dbus_object_path", ))

1251

1252

_interface = "se.recompile.Mandos.Client"

1230

+ ("dbus_object_path",))

1253

1231

1254

1232

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

1255

1233

1258

1236

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

1259

1237

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

1260

1238

# the D-Bus

1261

client_object_name = str(self.name).translate(

1239

client_object_name = unicode(self.name).translate(

1262

1240

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

1263

1241

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

1264

self.dbus_object_path = dbus.ObjectPath(

1265

"/clients/" + client_object_name)

1242

self.dbus_object_path = (dbus.ObjectPath

1243

("/clients/" + client_object_name))

1266

1244

DBusObjectWithProperties.__init__(self, self.bus,

1267

1245

self.dbus_object_path)

1268

1246

1269

def notifychangeproperty(transform_func, dbus_name,

1270

type_func=lambda x: x,

1271

variant_level=1,

1272

invalidate_only=False,

1273

_interface=_interface):

1247

def notifychangeproperty(transform_func,

1248

dbus_name, type_func=lambda x: x,

1249

variant_level=1):

1274

1250

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

1275

1251

its changes to DBus.

1276

1252

1281

1257

to the D-Bus. Default: no transform

1282

1258

variant_level: D-Bus variant level. Default: 1

1283

1259

"""

1284

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

1285

1260

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

1286

1261

def setter(self, value):

1287

1262

if hasattr(self, "dbus_object_path"):

1288

1263

if (not hasattr(self, attrname) or

1289

1264

type_func(getattr(self, attrname, None))

1290

1265

!= type_func(value)):

1291

if invalidate_only:

1292

self.PropertiesChanged(

1293

_interface, dbus.Dictionary(),

1294

dbus.Array((dbus_name, )))

1295

else:

1296

dbus_value = transform_func(

1297

type_func(value),

1298

variant_level = variant_level)

1299

self.PropertyChanged(dbus.String(dbus_name),

1300

dbus_value)

1301

self.PropertiesChanged(

1302

_interface,

1303

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

1304

dbus_value }),

1305

dbus.Array())

1266

dbus_value = transform_func(type_func(value),

1267

variant_level

1268

=variant_level)

1269

self.PropertyChanged(dbus.String(dbus_name),

1270

dbus_value)

1306

1271

setattr(self, attrname, value)

1307

1272

1308

1273

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

1314

1279

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

1315

1280

last_enabled = notifychangeproperty(datetime_to_dbus,

1316

1281

"LastEnabled")

1317

checker = notifychangeproperty(

1318

dbus.Boolean, "CheckerRunning",

1319

type_func = lambda checker: checker is not None)

1282

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

1283

type_func = lambda checker:

1284

checker is not None)

1320

1285

last_checked_ok = notifychangeproperty(datetime_to_dbus,

1321

1286

"LastCheckedOK")

1322

1287

last_checker_status = notifychangeproperty(dbus.Int16,

1325

1290

datetime_to_dbus, "LastApprovalRequest")

1326

1291

approved_by_default = notifychangeproperty(dbus.Boolean,

1327

1292

"ApprovedByDefault")

1328

approval_delay = notifychangeproperty(

1329

dbus.UInt64, "ApprovalDelay",

1330

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

1293

approval_delay = notifychangeproperty(dbus.UInt64,

1294

"ApprovalDelay",

1295

type_func =

1296

timedelta_to_milliseconds)

1331

1297

approval_duration = notifychangeproperty(

1332

1298

dbus.UInt64, "ApprovalDuration",

1333

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

1299

type_func = timedelta_to_milliseconds)

1334

1300

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

1335

timeout = notifychangeproperty(

1336

dbus.UInt64, "Timeout",

1337

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

1301

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

1302

type_func =

1303

timedelta_to_milliseconds)

1338

1304

extended_timeout = notifychangeproperty(

1339

1305

dbus.UInt64, "ExtendedTimeout",

1340

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

1341

interval = notifychangeproperty(

1342

dbus.UInt64, "Interval",

1343

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

1306

type_func = timedelta_to_milliseconds)

1307

interval = notifychangeproperty(dbus.UInt64,

1308

"Interval",

1309

type_func =

1310

timedelta_to_milliseconds)

1344

1311

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

1345

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

1346

invalidate_only=True)

1347

1312

1348

1313

del notifychangeproperty

1349

1314

1356

1321

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

1357

1322

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

1358

1323

1359

def checker_callback(self, source, condition,

1360

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

1361

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

1362

connection, command, *args,

1363

**kwargs)

1364

exitstatus = self.last_checker_status

1365

if exitstatus >= 0:

1324

def checker_callback(self, pid, condition, command,

1325

*args, **kwargs):

1326

self.checker_callback_tag = None

1327

self.checker = None

1328

if os.WIFEXITED(condition):

1329

exitstatus = os.WEXITSTATUS(condition)

1366

1330

# Emit D-Bus signal

1367

1331

self.CheckerCompleted(dbus.Int16(exitstatus),

1368

dbus.Int64(0),

1332

dbus.Int64(condition),

1369

1333

dbus.String(command))

1370

1334

else:

1371

1335

# Emit D-Bus signal

1372

1336

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

1373

dbus.Int64(

1374

self.last_checker_signal),

1337

dbus.Int64(condition),

1375

1338

dbus.String(command))

1376

return ret

1339

1340

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

1341

*args, **kwargs)

1377

1342

1378

1343

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

1379

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

1344

old_checker = self.checker

1345

if self.checker is not None:

1346

old_checker_pid = self.checker.pid

1347

else:

1348

old_checker_pid = None

1380

1349

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

1381

1350

# Only if new checker process was started

1382

1351

if (self.checker is not None

1391

1360

1392

1361

def approve(self, value=True):

1393

1362

self.approved = value

1394

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

1395

* 1000), self._reset_approved)

1363

gobject.timeout_add(timedelta_to_milliseconds

1364

(self.approval_duration),

1365

self._reset_approved)

1396

1366

self.send_changedstate()

1397

1367

1398

1368

## D-Bus methods, signals & properties

1369

_interface = "se.recompile.Mandos.Client"

1399

1370

1400

1371

## Interfaces

1401

1372

1373

@dbus_interface_annotations(_interface)

1374

def _foo(self):

1375

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

1376

"false"}

1377

1402

1378

## Signals

1403

1379

1404

1380

# CheckerCompleted - signal

1414

1390

pass

1415

1391

1416

1392

# PropertyChanged - signal

1417

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

1418

1393

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

1419

1394

def PropertyChanged(self, property, value):

1420

1395

"D-Bus signal"

1484

1459

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

1485

1460

1486

1461

# ApprovedByDefault - property

1487

@dbus_service_property(_interface,

1488

signature="b",

1462

@dbus_service_property(_interface, signature="b",

1489

1463

access="readwrite")

1490

1464

def ApprovedByDefault_dbus_property(self, value=None):

1491

1465

if value is None: # get

1493

1467

self.approved_by_default = bool(value)

1494

1468

1495

1469

# ApprovalDelay - property

1496

@dbus_service_property(_interface,

1497

signature="t",

1470

@dbus_service_property(_interface, signature="t",

1498

1471

access="readwrite")

1499

1472

def ApprovalDelay_dbus_property(self, value=None):

1500

1473

if value is None: # get

1501

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

1502

* 1000)

1474

return dbus.UInt64(self.approval_delay_milliseconds())

1503

1475

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

1504

1476

1505

1477

# ApprovalDuration - property

1506

@dbus_service_property(_interface,

1507

signature="t",

1478

@dbus_service_property(_interface, signature="t",

1508

1479

access="readwrite")

1509

1480

def ApprovalDuration_dbus_property(self, value=None):

1510

1481

if value is None: # get

1511

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

1512

* 1000)

1482

return dbus.UInt64(timedelta_to_milliseconds(

1483

self.approval_duration))

1513

1484

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

1514

1485

1515

1486

# Name - property

1523

1494

return dbus.String(self.fingerprint)

1524

1495

1525

1496

# Host - property

1526

@dbus_service_property(_interface,

1527

signature="s",

1497

@dbus_service_property(_interface, signature="s",

1528

1498

access="readwrite")

1529

1499

def Host_dbus_property(self, value=None):

1530

1500

if value is None: # get

1531

1501

return dbus.String(self.host)

1532

self.host = str(value)

1502

self.host = unicode(value)

1533

1503

1534

1504

# Created - property

1535

1505

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

1542

1512

return datetime_to_dbus(self.last_enabled)

1543

1513

1544

1514

# Enabled - property

1545

@dbus_service_property(_interface,

1546

signature="b",

1515

@dbus_service_property(_interface, signature="b",

1547

1516

access="readwrite")

1548

1517

def Enabled_dbus_property(self, value=None):

1549

1518

if value is None: # get

1554

1523

self.disable()

1555

1524

1556

1525

# LastCheckedOK - property

1557

@dbus_service_property(_interface,

1558

signature="s",

1526

@dbus_service_property(_interface, signature="s",

1559

1527

access="readwrite")

1560

1528

def LastCheckedOK_dbus_property(self, value=None):

1561

1529

if value is not None:

1564

1532

return datetime_to_dbus(self.last_checked_ok)

1565

1533

1566

1534

# LastCheckerStatus - property

1567

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

1535

@dbus_service_property(_interface, signature="n",

1536

access="read")

1568

1537

def LastCheckerStatus_dbus_property(self):

1569

1538

return dbus.Int16(self.last_checker_status)

1570

1539

1579

1548

return datetime_to_dbus(self.last_approval_request)

1580

1549

1581

1550

# Timeout - property

1582

@dbus_service_property(_interface,

1583

signature="t",

1551

@dbus_service_property(_interface, signature="t",

1584

1552

access="readwrite")

1585

1553

def Timeout_dbus_property(self, value=None):

1586

1554

if value is None: # get

1587

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

1555

return dbus.UInt64(self.timeout_milliseconds())

1588

1556

old_timeout = self.timeout

1589

1557

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

1590

1558

# Reschedule disabling

1599

1567

is None):

1600

1568

return

1601

1569

gobject.source_remove(self.disable_initiator_tag)

1602

self.disable_initiator_tag = gobject.timeout_add(

1603

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

1604

self.disable)

1570

self.disable_initiator_tag = (

1571

gobject.timeout_add(

1572

timedelta_to_milliseconds(self.expires - now),

1573

self.disable))

1605

1574

1606

1575

# ExtendedTimeout - property

1607

@dbus_service_property(_interface,

1608

signature="t",

1576

@dbus_service_property(_interface, signature="t",

1609

1577

access="readwrite")

1610

1578

def ExtendedTimeout_dbus_property(self, value=None):

1611

1579

if value is None: # get

1612

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

1613

* 1000)

1580

return dbus.UInt64(self.extended_timeout_milliseconds())

1614

1581

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

1615

1582

1616

1583

# Interval - property

1617

@dbus_service_property(_interface,

1618

signature="t",

1584

@dbus_service_property(_interface, signature="t",

1619

1585

access="readwrite")

1620

1586

def Interval_dbus_property(self, value=None):

1621

1587

if value is None: # get

1622

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

1588

return dbus.UInt64(self.interval_milliseconds())

1623

1589

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

1624

1590

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

1625

1591

return

1626

1592

if self.enabled:

1627

1593

# Reschedule checker run

1628

1594

gobject.source_remove(self.checker_initiator_tag)

1629

self.checker_initiator_tag = gobject.timeout_add(

1630

value, self.start_checker)

1631

self.start_checker() # Start one now, too

1595

self.checker_initiator_tag = (gobject.timeout_add

1596

(value, self.start_checker))

1597

self.start_checker() # Start one now, too

1632

1598

1633

1599

# Checker - property

1634

@dbus_service_property(_interface,

1635

signature="s",

1600

@dbus_service_property(_interface, signature="s",

1636

1601

access="readwrite")

1637

1602

def Checker_dbus_property(self, value=None):

1638

1603

if value is None: # get

1639

1604

return dbus.String(self.checker_command)

1640

self.checker_command = str(value)

1605

self.checker_command = unicode(value)

1641

1606

1642

1607

# CheckerRunning - property

1643

@dbus_service_property(_interface,

1644

signature="b",

1608

@dbus_service_property(_interface, signature="b",

1645

1609

access="readwrite")

1646

1610

def CheckerRunning_dbus_property(self, value=None):

1647

1611

if value is None: # get

1657

1621

return self.dbus_object_path # is already a dbus.ObjectPath

1658

1622

1659

1623

# Secret = property

1660

@dbus_service_property(_interface,

1661

signature="ay",

1662

access="write",

1663

byte_arrays=True)

1624

@dbus_service_property(_interface, signature="ay",

1625

access="write", byte_arrays=True)

1664

1626

def Secret_dbus_property(self, value):

1665

self.secret = bytes(value)

1627

self.secret = str(value)

1666

1628

1667

1629

del _interface

1668

1630

1672

1634

self._pipe = child_pipe

1673

1635

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

1674

1636

if not self._pipe.recv():

1675

raise KeyError(fpr)

1637

raise KeyError()

1676

1638

1677

1639

def __getattribute__(self, name):

1678

1640

if name == '_pipe':

1682

1644

if data[0] == 'data':

1683

1645

return data[1]

1684

1646

if data[0] == 'function':

1685

1686

1647

def func(*args, **kwargs):

1687

1648

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

1688

1649

return self._pipe.recv()[1]

1689

1690

1650

return func

1691

1651

1692

1652

def __setattr__(self, name, value):

1704

1664

def handle(self):

1705

1665

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

1706

1666

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

1707

str(self.client_address))

1667

unicode(self.client_address))

1708

1668

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

1709

1669

self.server.child_pipe.fileno())

1710

1670

1711

session = gnutls.connection.ClientSession(

1712

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

1671

session = (gnutls.connection

1672

.ClientSession(self.request,

1673

gnutls.connection

1674

.X509Credentials()))

1713

1675

1714

1676

# Note: gnutls.connection.X509Credentials is really a

1715

1677

# generic GnuTLS certificate credentials object so long as

1724

1686

priority = self.server.gnutls_priority

1725

1687

if priority is None:

1726

1688

priority = "NORMAL"

1727

gnutls.library.functions.gnutls_priority_set_direct(

1728

session._c_object, priority, None)

1689

(gnutls.library.functions

1690

.gnutls_priority_set_direct(session._c_object,

1691

priority, None))

1729

1692

1730

1693

# Start communication using the Mandos protocol

1731

1694

# Get protocol number

1733

1696

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

1734

1697

try:

1735

1698

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

1736

raise RuntimeError(line)

1699

raise RuntimeError

1737

1700

except (ValueError, IndexError, RuntimeError) as error:

1738

1701

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

1739

1702

return

1751

1714

approval_required = False

1752

1715

try:

1753

1716

try:

1754

fpr = self.fingerprint(

1755

self.peer_certificate(session))

1717

fpr = self.fingerprint(self.peer_certificate

1718

(session))

1756

1719

except (TypeError,

1757

1720

gnutls.errors.GNUTLSError) as error:

1758

1721

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

1773

1736

while True:

1774

1737

if not client.enabled:

1775

1738

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

1776

client.name)

1739

client.name)

1777

1740

if self.server.use_dbus:

1778

1741

# Emit D-Bus signal

1779

1742

client.Rejected("Disabled")

1788

1751

if self.server.use_dbus:

1789

1752

# Emit D-Bus signal

1790

1753

client.NeedApproval(

1791

client.approval_delay.total_seconds()

1792

* 1000, client.approved_by_default)

1754

client.approval_delay_milliseconds(),

1755

client.approved_by_default)

1793

1756

else:

1794

1757

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

1795

1758

client.name)

1801

1764

#wait until timeout or approved

1802

1765

time = datetime.datetime.now()

1803

1766

client.changedstate.acquire()

1804

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

1767

client.changedstate.wait(

1768

float(timedelta_to_milliseconds(delay)

1769

/ 1000))

1805

1770

client.changedstate.release()

1806

1771

time2 = datetime.datetime.now()

1807

1772

if (time2 - time) >= delay:

1826

1791

logger.warning("gnutls send failed",

1827

1792

exc_info=error)

1828

1793

return

1829

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

1830

len(client.secret) - (sent_size

1831

+ sent))

1794

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

1795

sent, len(client.secret)

1796

- (sent_size + sent))

1832

1797

sent_size += sent

1833

1798

1834

1799

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

1851

1816

def peer_certificate(session):

1852

1817

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

1853

1818

# If not an OpenPGP certificate...

1854

if (gnutls.library.functions.gnutls_certificate_type_get(

1855

session._c_object)

1819

if (gnutls.library.functions

1820

.gnutls_certificate_type_get(session._c_object)

1856

1821

!= gnutls.library.constants.GNUTLS_CRT_OPENPGP):

1857

1822

# ...do the normal thing

1858

1823

return session.peer_certificate

1872

1837

def fingerprint(openpgp):

1873

1838

"Convert an OpenPGP bytestring to a hexdigit fingerprint"

1874

1839

# New GnuTLS "datum" with the OpenPGP public key

1875

datum = gnutls.library.types.gnutls_datum_t(

1876

ctypes.cast(ctypes.c_char_p(openpgp),

1877

ctypes.POINTER(ctypes.c_ubyte)),

1878

ctypes.c_uint(len(openpgp)))

1840

datum = (gnutls.library.types

1841

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

1842

ctypes.POINTER

1843

(ctypes.c_ubyte)),

1844

ctypes.c_uint(len(openpgp))))

1879

1845

# New empty GnuTLS certificate

1880

1846

crt = gnutls.library.types.gnutls_openpgp_crt_t()

1881

gnutls.library.functions.gnutls_openpgp_crt_init(

1882

ctypes.byref(crt))

1847

(gnutls.library.functions

1848

.gnutls_openpgp_crt_init(ctypes.byref(crt)))

1883

1849

# Import the OpenPGP public key into the certificate

1884

gnutls.library.functions.gnutls_openpgp_crt_import(

1885

crt, ctypes.byref(datum),

1886

gnutls.library.constants.GNUTLS_OPENPGP_FMT_RAW)

1850

(gnutls.library.functions

1851

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

1852

gnutls.library.constants

1853

.GNUTLS_OPENPGP_FMT_RAW))

1887

1854

# Verify the self signature in the key

1888

1855

crtverify = ctypes.c_uint()

1889

gnutls.library.functions.gnutls_openpgp_crt_verify_self(

1890

crt, 0, ctypes.byref(crtverify))

1856

(gnutls.library.functions

1857

.gnutls_openpgp_crt_verify_self(crt, 0,

1858

ctypes.byref(crtverify)))

1891

1859

if crtverify.value != 0:

1892

1860

gnutls.library.functions.gnutls_openpgp_crt_deinit(crt)

1893

raise gnutls.errors.CertificateSecurityError(

1894

"Verify failed")

1861

raise (gnutls.errors.CertificateSecurityError

1862

("Verify failed"))

1895

1863

# New buffer for the fingerprint

1896

1864

buf = ctypes.create_string_buffer(20)

1897

1865

buf_len = ctypes.c_size_t()

1898

1866

# Get the fingerprint from the certificate into the buffer

1899

gnutls.library.functions.gnutls_openpgp_crt_get_fingerprint(

1900

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

1867

(gnutls.library.functions

1868

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

1869

ctypes.byref(buf_len)))

1901

1870

# Deinit the certificate

1902

1871

gnutls.library.functions.gnutls_openpgp_crt_deinit(crt)

1903

1872

# Convert the buffer to a Python bytestring

1909

1878

1910

1879

class MultiprocessingMixIn(object):

1911

1880

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

1912

1913

1881

def sub_process_main(self, request, address):

1914

1882

try:

1915

1883

self.finish_request(request, address)

1927

1895

1928

1896

class MultiprocessingMixInWithPipe(MultiprocessingMixIn, object):

1929

1897

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

1930

1931

1898

def process_request(self, request, client_address):

1932

1899

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

1933

1900

1942

1909

1943

1910

def add_pipe(self, parent_pipe, proc):

1944

1911

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

1945

raise NotImplementedError()

1912

raise NotImplementedError

1946

1913

1947

1914

1948

1915

class IPv6_TCPServer(MultiprocessingMixInWithPipe,

1954

1921

interface: None or a network interface name (string)

1955

1922

use_ipv6: Boolean; to use IPv6 or not

1956

1923

"""

1957

1958

1924

def __init__(self, server_address, RequestHandlerClass,

1959

interface=None,

1960

use_ipv6=True,

1961

socketfd=None):

1925

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

1962

1926

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

1963

1927

creating a new one with socket.socket().

1964

1928

"""

2005

1969

self.interface)

2006

1970

else:

2007

1971

try:

2008

self.socket.setsockopt(

2009

socket.SOL_SOCKET, SO_BINDTODEVICE,

2010

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

1972

self.socket.setsockopt(socket.SOL_SOCKET,

1973

SO_BINDTODEVICE,

1974

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

2011

1975

except socket.error as error:

2012

1976

if error.errno == errno.EPERM:

2013

1977

logger.error("No permission to bind to"

2031

1995

self.server_address = (any_address,

2032

1996

self.server_address[1])

2033

1997

elif not self.server_address[1]:

2034

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

1998

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

1999

0)

2035

2000

# if self.interface:

2036

2001

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

2037

2002

# 0, # port

2051

2016

2052

2017

Assumes a gobject.MainLoop event loop.

2053

2018

"""

2054

2055

2019

def __init__(self, server_address, RequestHandlerClass,

2056

interface=None,

2057

use_ipv6=True,

2058

clients=None,

2059

gnutls_priority=None,

2060

use_dbus=True,

2061

socketfd=None):

2020

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

2021

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

2062

2022

self.enabled = False

2063

2023

self.clients = clients

2064

2024

if self.clients is None:

2070

2030

interface = interface,

2071

2031

use_ipv6 = use_ipv6,

2072

2032

socketfd = socketfd)

2073

2074

2033

def server_activate(self):

2075

2034

if self.enabled:

2076

2035

return socketserver.TCPServer.server_activate(self)

2080

2039

2081

2040

def add_pipe(self, parent_pipe, proc):

2082

2041

# Call "handle_ipc" for both data and EOF events

2083

gobject.io_add_watch(

2084

parent_pipe.fileno(),

2085

gobject.IO_IN | gobject.IO_HUP,

2086

functools.partial(self.handle_ipc,

2087

parent_pipe = parent_pipe,

2088

proc = proc))

2042

gobject.io_add_watch(parent_pipe.fileno(),

2043

gobject.IO_IN | gobject.IO_HUP,

2044

functools.partial(self.handle_ipc,

2045

parent_pipe =

2046

parent_pipe,

2047

proc = proc))

2089

2048

2090

def handle_ipc(self, source, condition,

2091

parent_pipe=None,

2092

proc = None,

2093

client_object=None):

2049

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

2050

proc = None, client_object=None):

2094

2051

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

2095

2052

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

2096

2053

# Wait for other process to exit

2119

2076

parent_pipe.send(False)

2120

2077

return False

2121

2078

2122

gobject.io_add_watch(

2123

parent_pipe.fileno(),

2124

gobject.IO_IN | gobject.IO_HUP,

2125

functools.partial(self.handle_ipc,

2126

parent_pipe = parent_pipe,

2127

proc = proc,

2128

client_object = client))

2079

gobject.io_add_watch(parent_pipe.fileno(),

2080

gobject.IO_IN | gobject.IO_HUP,

2081

functools.partial(self.handle_ipc,

2082

parent_pipe =

2083

parent_pipe,

2084

proc = proc,

2085

client_object =

2086

client))

2129

2087

parent_pipe.send(True)

2130

2088

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

2131

2089

# same fileno

2137

2095

2138

2096

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

2139

2097

funcname)(*args,

2140

**kwargs)))

2098

**kwargs)))

2141

2099

2142

2100

if command == 'getattr':

2143

2101

attrname = request[1]

2144

if isinstance(client_object.__getattribute__(attrname),

2145

collections.Callable):

2146

parent_pipe.send(('function', ))

2102

if callable(client_object.__getattribute__(attrname)):

2103

parent_pipe.send(('function',))

2147

2104

else:

2148

parent_pipe.send((

2149

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

2105

parent_pipe.send(('data', client_object

2106

.__getattribute__(attrname)))

2150

2107

2151

2108

if command == 'setattr':

2152

2109

attrname = request[1]

2183

2140

# avoid excessive use of external libraries.

2184

2141

2185

2142

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

2186

Token = collections.namedtuple("Token", (

2187

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

2188

# a "group" containing digits

2189

"value", # datetime.timedelta or None

2190

"followers")) # Tokens valid after this token

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

2191

2152

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

2192

2153

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

2193

2154

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

2194

2155

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

2195

2156

datetime.timedelta(seconds=1),

2196

frozenset((token_end, )))

2157

frozenset((token_end,)))

2197

2158

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

2198

2159

datetime.timedelta(minutes=1),

2199

2160

frozenset((token_second, token_end)))

2215

2176

frozenset((token_month, token_end)))

2216

2177

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

2217

2178

datetime.timedelta(weeks=1),

2218

frozenset((token_end, )))

2179

frozenset((token_end,)))

2219

2180

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

2220

2181

frozenset((token_year, token_month,

2221

2182

token_day, token_time,

2222

token_week)))

2183

token_week))),

2223

2184

# Define starting values

2224

2185

value = datetime.timedelta() # Value so far

2225

2186

found_token = None

2226

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

2187

followers = frozenset(token_duration,) # Following valid tokens

2227

2188

s = duration # String left to parse

2228

2189

# Loop until end token is found

2229

2190

while found_token is not token_end:

2246

2207

break

2247

2208

else:

2248

2209

# No currently valid tokens were found

2249

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

2250

.format(duration))

2210

raise ValueError("Invalid RFC 3339 duration")

2251

2211

# End token found

2252

2212

return value

2253

2213

2277

2237

timevalue = datetime.timedelta(0)

2278

2238

for s in interval.split():

2279

2239

try:

2280

suffix = s[-1]

2240

suffix = unicode(s[-1])

2281

2241

value = int(s[:-1])

2282

2242

if suffix == "d":

2283

2243

delta = datetime.timedelta(value)

2290

2250

elif suffix == "w":

2291

2251

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

2292

2252

else:

2293

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

2294

except IndexError as e:

2253

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

2254

.format(suffix))

2255

except (ValueError, IndexError) as e:

2295

2256

raise ValueError(*(e.args))

2296

2257

timevalue += delta

2297

2258

return timevalue

2313

2274

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

2314

2275

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

2315

2276

raise OSError(errno.ENODEV,

2316

"{} not a character device"

2277

"{0} not a character device"

2317

2278

.format(os.devnull))

2318

2279

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

2319

2280

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

2329

2290

2330

2291

parser = argparse.ArgumentParser()

2331

2292

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

2332

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

2293

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

2333

2294

help="show version number and exit")

2334

2295

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

2335

2296

help="Bind to interface IF")

2368

2329

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

2369

2330

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

2370

2331

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

2371

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

2372

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

2373

default=None)

2374

2332

2375

2333

options = parser.parse_args()

2376

2334

2377

2335

if options.check:

2378

2336

import doctest

2379

fail_count, test_count = doctest.testmod()

2380

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

2337

doctest.testmod()

2338

sys.exit()

2381

2339

2382

2340

# Default values for config file for server-global settings

2383

2341

server_defaults = { "interface": "",

2385

2343

"port": "",

2386

2344

"debug": "False",

2387

2345

"priority":

2388

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

2389

":+SIGN-RSA-SHA224:+SIGN-RSA-RMD160",

2346

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

2390

2347

"servicename": "Mandos",

2391

2348

"use_dbus": "True",

2392

2349

"use_ipv6": "True",

2395

2352

"socket": "",

2396

2353

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

2397

2354

"foreground": "False",

2398

"zeroconf": "True",

2399

}

2355

}

2400

2356

2401

2357

# Parse config file for server-global settings

2402

2358

server_config = configparser.SafeConfigParser(server_defaults)

2403

2359

del server_defaults

2404

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

2360

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

2361

"mandos.conf"))

2405

2362

# Convert the SafeConfigParser object to a dict

2406

2363

server_settings = server_config.defaults()

2407

2364

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

2425

2382

# Override the settings from the config file with command line

2426

2383

# options, if set.

2427

2384

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

2428

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

2429

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

2430

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

2385

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

2386

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

2387

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

2431

2388

value = getattr(options, option)

2432

2389

if value is not None:

2433

2390

server_settings[option] = value

2434

2391

del options

2435

2392

# Force all strings to be unicode

2436

2393

for option in server_settings.keys():

2437

if isinstance(server_settings[option], bytes):

2438

server_settings[option] = (server_settings[option]

2439

.decode("utf-8"))

2394

if type(server_settings[option]) is str:

2395

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

2440

2396

# Force all boolean options to be boolean

2441

2397

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

2442

"foreground", "zeroconf"):

2398

"foreground"):

2443

2399

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

2444

2400

# Debug implies foreground

2445

2401

if server_settings["debug"]:

2448

2404

2449

2405

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

2450

2406

2451

if (not server_settings["zeroconf"]

2452

and not (server_settings["port"]

2453

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

2454

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

2455

2456

2407

# For convenience

2457

2408

debug = server_settings["debug"]

2458

2409

debuglevel = server_settings["debuglevel"]

2461

2412

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

2462

2413

stored_state_file)

2463

2414

foreground = server_settings["foreground"]

2464

zeroconf = server_settings["zeroconf"]

2465

2415

2466

2416

if debug:

2467

2417

initlogger(debug, logging.DEBUG)

2473

2423

initlogger(debug, level)

2474

2424

2475

2425

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

2476

syslogger.setFormatter(

2477

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

2478

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

2479

server_settings["servicename"])))

2426

syslogger.setFormatter(logging.Formatter

2427

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

2428

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

2429

.format(server_settings

2430

["servicename"])))

2480

2431

2481

2432

# Parse config file with clients

2482

2433

client_config = configparser.SafeConfigParser(Client

2487

2438

global mandos_dbus_service

2488

2439

mandos_dbus_service = None

2489

2440

2490

socketfd = None

2491

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

2492

socketfd = server_settings["socket"]

2493

tcp_server = MandosServer(

2494

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

2495

ClientHandler,

2496

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

2497

use_ipv6=use_ipv6,

2498

gnutls_priority=server_settings["priority"],

2499

use_dbus=use_dbus,

2500

socketfd=socketfd)

2441

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

2442

server_settings["port"]),

2443

ClientHandler,

2444

interface=(server_settings["interface"]

2445

or None),

2446

use_ipv6=use_ipv6,

2447

gnutls_priority=

2448

server_settings["priority"],

2449

use_dbus=use_dbus,

2450

socketfd=(server_settings["socket"]

2451

or None))

2501

2452

if not foreground:

2502

2453

pidfilename = "/run/mandos.pid"

2503

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

2504

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

2505

2454

pidfile = None

2506

2455

try:

2507

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

2456

pidfile = open(pidfilename, "w")

2508

2457

except IOError as e:

2509

2458

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

2510

2459

exc_info=e)

2524

2473

os.setuid(uid)

2525

2474

except OSError as error:

2526

2475

if error.errno != errno.EPERM:

2527

raise

2476

raise error

2528

2477

2529

2478

if debug:

2530

2479

# Enable all possible GnuTLS debugging

2537

2486

def debug_gnutls(level, string):

2538

2487

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

2539

2488

2540

gnutls.library.functions.gnutls_global_set_log_function(

2541

debug_gnutls)

2489

(gnutls.library.functions

2490

.gnutls_global_set_log_function(debug_gnutls))

2542

2491

2543

2492

# Redirect stdin so all checkers get /dev/null

2544

2493

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

2564

2513

if use_dbus:

2565

2514

try:

2566

2515

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

2567

bus,

2568

do_not_queue=True)

2569

old_bus_name = dbus.service.BusName(

2570

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

2571

do_not_queue=True)

2572

except dbus.exceptions.DBusException as e:

2516

bus, do_not_queue=True)

2517

old_bus_name = (dbus.service.BusName

2518

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

2519

do_not_queue=True))

2520

except dbus.exceptions.NameExistsException as e:

2573

2521

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

2574

2522

use_dbus = False

2575

2523

server_settings["use_dbus"] = False

2576

2524

tcp_server.use_dbus = False

2577

if zeroconf:

2578

protocol = avahi.PROTO_INET6 if use_ipv6 else avahi.PROTO_INET

2579

service = AvahiServiceToSyslog(

2580

name = server_settings["servicename"],

2581

servicetype = "_mandos._tcp",

2582

protocol = protocol,

2583

bus = bus)

2584

if server_settings["interface"]:

2585

service.interface = if_nametoindex(

2586

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

2525

protocol = avahi.PROTO_INET6 if use_ipv6 else avahi.PROTO_INET

2526

service = AvahiServiceToSyslog(name =

2527

server_settings["servicename"],

2528

servicetype = "_mandos._tcp",

2529

protocol = protocol, bus = bus)

2530

if server_settings["interface"]:

2531

service.interface = (if_nametoindex

2532

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

2587

2533

2588

2534

global multiprocessing_manager

2589

2535

multiprocessing_manager = multiprocessing.Manager()

2608

2554

if server_settings["restore"]:

2609

2555

try:

2610

2556

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

2611

clients_data, old_client_settings = pickle.load(

2612

stored_state)

2557

clients_data, old_client_settings = (pickle.load

2558

(stored_state))

2613

2559

os.remove(stored_state_path)

2614

2560

except IOError as e:

2615

2561

if e.errno == errno.ENOENT:

2616

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

2617

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

2562

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

2563

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

2618

2564

else:

2619

2565

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

2620

2566

exc_info=e)

2621

2567

raise

2622

2568

except EOFError as e:

2623

2569

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

2624

"EOFError:",

2625

exc_info=e)

2570

"EOFError:", exc_info=e)

2626

2571

2627

2572

with PGPEngine() as pgp:

2628

for client_name, client in clients_data.items():

2573

for client_name, client in clients_data.iteritems():

2629

2574

# Skip removed clients

2630

2575

if client_name not in client_settings:

2631

2576

continue

2640

2585

# For each value in new config, check if it

2641

2586

# differs from the old config value (Except for

2642

2587

# the "secret" attribute)

2643

if (name != "secret"

2644

and (value !=

2645

old_client_settings[client_name][name])):

2588

if (name != "secret" and

2589

value != old_client_settings[client_name]

2590

[name]):

2646

2591

client[name] = value

2647

2592

except KeyError:

2648

2593

pass

2649

2594

2650

2595

# Clients who has passed its expire date can still be

2651

# enabled if its last checker was successful. A Client

2596

# enabled if its last checker was successful. Clients

2652

2597

# whose checker succeeded before we stored its state is

2653

2598

# assumed to have successfully run all checkers during

2654

2599

# downtime.

2656

2601

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

2657

2602

if not client["last_checked_ok"]:

2658

2603

logger.warning(

2659

"disabling client {} - Client never "

2660

"performed a successful checker".format(

2661

client_name))

2604

"disabling client {0} - Client never "

2605

"performed a successful checker"

2606

.format(client_name))

2662

2607

client["enabled"] = False

2663

2608

elif client["last_checker_status"] != 0:

2664

2609

logger.warning(

2665

"disabling client {} - Client last"

2666

" checker failed with error code"

2667

" {}".format(

2668

client_name,

2669

client["last_checker_status"]))

2610

"disabling client {0} - Client "

2611

"last checker failed with error code {1}"

2612

.format(client_name,

2613

client["last_checker_status"]))

2670

2614

client["enabled"] = False

2671

2615

else:

2672

client["expires"] = (

2673

datetime.datetime.utcnow()

2674

+ client["timeout"])

2616

client["expires"] = (datetime.datetime

2617

.utcnow()

2618

+ client["timeout"])

2675

2619

logger.debug("Last checker succeeded,"

2676

" keeping {} enabled".format(

2677

client_name))

2620

" keeping {0} enabled"

2621

.format(client_name))

2678

2622

try:

2679

client["secret"] = pgp.decrypt(

2680

client["encrypted_secret"],

2681

client_settings[client_name]["secret"])

2623

client["secret"] = (

2624

pgp.decrypt(client["encrypted_secret"],

2625

client_settings[client_name]

2626

["secret"]))

2682

2627

except PGPError:

2683

2628

# If decryption fails, we use secret from new settings

2684

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

2685

client_name))

2686

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

2687

["secret"])

2629

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

2630

.format(client_name))

2631

client["secret"] = (

2632

client_settings[client_name]["secret"])

2688

2633

2689

2634

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

2690

2635

for client_name in (set(old_client_settings)

2695

2640

clients_data[client_name] = client_settings[client_name]

2696

2641

2697

2642

# Create all client objects

2698

for client_name, client in clients_data.items():

2643

for client_name, client in clients_data.iteritems():

2699

2644

tcp_server.clients[client_name] = client_class(

2700

name = client_name,

2701

settings = client,

2645

name = client_name, settings = client,

2702

2646

server_settings = server_settings)

2703

2647

2704

2648

if not tcp_server.clients:

2706

2650

2707

2651

if not foreground:

2708

2652

if pidfile is not None:

2709

pid = os.getpid()

2710

2653

try:

2711

2654

with pidfile:

2712

print(pid, file=pidfile)

2655

pid = os.getpid()

2656

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

2713

2657

except IOError:

2714

2658

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

2715

2659

pidfilename, pid)

2720

2664

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

2721

2665

2722

2666

if use_dbus:

2723

2724

@alternate_dbus_interfaces(

2725

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

2667

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

2668

"se.bsnet.fukt.Mandos"})

2726

2669

class MandosDBusService(DBusObjectWithProperties):

2727

2670

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

2728

2729

2671

def __init__(self):

2730

2672

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

2731

2732

2673

_interface = "se.recompile.Mandos"

2733

2674

2734

2675

@dbus_interface_annotations(_interface)

2735

2676

def _foo(self):

2736

return {

2737

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

2738

"false" }

2677

return { "org.freedesktop.DBus.Property"

2678

".EmitsChangedSignal":

2679

"false"}

2739

2680

2740

2681

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

2741

2682

def ClientAdded(self, objpath):

2755

2696

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

2756

2697

def GetAllClients(self):

2757

2698

"D-Bus method"

2758

return dbus.Array(c.dbus_object_path for c in

2699

return dbus.Array(c.dbus_object_path

2700

for c in

2759

2701

tcp_server.clients.itervalues())

2760

2702

2761

2703

@dbus.service.method(_interface,

2763

2705

def GetAllClientsWithProperties(self):

2764

2706

"D-Bus method"

2765

2707

return dbus.Dictionary(

2766

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

2767

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

2708

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

2709

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

2768

2710

signature="oa{sv}")

2769

2711

2770

2712

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

2787

2729

2788

2730

def cleanup():

2789

2731

"Cleanup function; run on exit"

2790

if zeroconf:

2791

service.cleanup()

2732

service.cleanup()

2792

2733

2793

2734

multiprocessing.active_children()

2794

2735

wnull.close()

2808

2749

2809

2750

# A list of attributes that can not be pickled

2810

2751

# + secret.

2811

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

2812

"checker", "server_settings" }

2813

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

2814

.Object):

2752

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

2753

"checker", "server_settings"))

2754

for name, typ in (inspect.getmembers

2755

(dbus.service.Object)):

2815

2756

exclude.add(name)

2816

2757

2817

2758

client_dict["encrypted_secret"] = (client

2824

2765

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

2825

2766

2826

2767

try:

2827

with tempfile.NamedTemporaryFile(

2828

mode='wb',

2829

suffix=".pickle",

2830

prefix='clients-',

2831

dir=os.path.dirname(stored_state_path),

2832

delete=False) 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:

2833

2772

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

2834

tempname = stored_state.name

2773

tempname=stored_state.name

2835

2774

os.rename(tempname, stored_state_path)

2836

2775

except (IOError, OSError) as e:

2837

2776

if not debug:

2840

2779

except NameError:

2841

2780

pass

2842

2781

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

2843

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

2782

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

2844

2783

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

2845

2784

else:

2846

2785

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

2847

2786

exc_info=e)

2848

raise

2787

raise e

2849

2788

2850

2789

# Delete all clients, and settings from config

2851

2790

while tcp_server.clients:

2856

2795

client.disable(quiet=True)

2857

2796

if use_dbus:

2858

2797

# Emit D-Bus signal

2859

mandos_dbus_service.ClientRemoved(

2860

client.dbus_object_path, client.name)

2798

mandos_dbus_service.ClientRemoved(client

2799

.dbus_object_path,

2800

client.name)

2861

2801

client_settings.clear()

2862

2802

2863

2803

atexit.register(cleanup)

2874

2814

tcp_server.server_activate()

2875

2815

2876

2816

# Find out what port we got

2877

if zeroconf:

2878

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

2817

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

2879

2818

if use_ipv6:

2880

2819

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

2881

2820

" flowinfo %d, scope_id %d",

2887

2826

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

2888

2827

2889

2828

try:

2890

if zeroconf:

2891

# From the Avahi example code

2892

try:

2893

service.activate()

2894

except dbus.exceptions.DBusException as error:

2895

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

2896

cleanup()

2897

sys.exit(1)

2898

# End of Avahi example code

2829

# From the Avahi example code

2830

try:

2831

service.activate()

2832

except dbus.exceptions.DBusException as error:

2833

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

2834

cleanup()

2835

sys.exit(1)

2836

# End of Avahi example code

2899

2837

2900

2838

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

2901

2839

lambda *args, **kwargs:

2916

2854

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

2917

2855

cleanup()

2918

2856

2919

2920

2857

if __name__ == '__main__':

2921

2858

main()