/mandos/trunk : revision 753

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

80

import collections

81

import codecs

71

82

72

83

import dbus

73

84

import dbus.service

74

import gobject

85

try:

86

import gobject

87

except ImportError:

88

from gi.repository import GObject as gobject

75

89

import avahi

76

90

from dbus.mainloop.glib import DBusGMainLoop

77

91

import ctypes

78

92

import ctypes.util

79

93

import xml.dom.minidom

80

94

import inspect

81

import GnuPGInterface

82

95

83

96

try:

84

97

SO_BINDTODEVICE = socket.SO_BINDTODEVICE

88

101

except ImportError:

89

102

SO_BINDTODEVICE = None

90

103

91

version = "1.5.4"

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

self.gnupg = GnuPGInterface.GnuPG()

143

159

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

144

self.gnupg = GnuPGInterface.GnuPG()

145

self.gnupg.options.meta_interactive = False

146

self.gnupg.options.homedir = self.tempdir

147

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

148

'--quiet',

149

'--no-use-agent'])

160

self.gnupgargs = ['--batch',

161

'--home', self.tempdir,

162

'--force-mdc',

163

'--quiet',

164

'--no-use-agent']

150

165

151

166

def __enter__(self):

152

167

return self

174

189

def password_encode(self, password):

175

190

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

176

191

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

177

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

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

178

199

179

200

def encrypt(self, data, password):

180

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

181

with open(os.devnull, "w") as devnull:

182

try:

183

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

184

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

185

attach_fhs={'stderr': devnull})

186

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

187

f.write(data)

188

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

189

ciphertext = f.read()

190

proc.wait()

191

except IOError as e:

192

raise PGPError(e)

193

self.gnupg.passphrase = None

201

passphrase = self.password_encode(password)

202

with tempfile.NamedTemporaryFile(

203

dir=self.tempdir) as passfile:

204

passfile.write(passphrase)

205

passfile.flush()

206

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

207

'--passphrase-file',

208

passfile.name]

209

+ self.gnupgargs,

210

stdin = subprocess.PIPE,

211

stdout = subprocess.PIPE,

212

stderr = subprocess.PIPE)

213

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

214

if proc.returncode != 0:

215

raise PGPError(err)

194

216

return ciphertext

195

217

196

218

def decrypt(self, data, password):

197

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

198

with open(os.devnull, "w") as devnull:

199

try:

200

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

201

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

202

attach_fhs={'stderr': devnull})

203

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

204

f.write(data)

205

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

206

decrypted_plaintext = f.read()

207

proc.wait()

208

except IOError as e:

209

raise PGPError(e)

210

self.gnupg.passphrase = None

219

passphrase = self.password_encode(password)

220

with tempfile.NamedTemporaryFile(

221

dir = self.tempdir) as passfile:

222

passfile.write(passphrase)

223

passfile.flush()

224

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

225

'--passphrase-file',

226

passfile.name]

227

+ self.gnupgargs,

228

stdin = subprocess.PIPE,

229

stdout = subprocess.PIPE,

230

stderr = subprocess.PIPE)

231

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

232

if proc.returncode != 0:

233

raise PGPError(err)

211

234

return decrypted_plaintext

212

235

213

236

214

237

class AvahiError(Exception):

215

238

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

216

239

self.value = value

217

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

218

def __unicode__(self):

219

return unicode(repr(self.value))

240

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

241

**kwargs)

242

220

243

221

244

class AvahiServiceError(AvahiError):

222

245

pass

223

246

247

224

248

class AvahiGroupError(AvahiError):

225

249

pass

226

250

233

257

Used to optionally bind to the specified interface.

234

258

name: string; Example: 'Mandos'

235

259

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

236

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

260

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

237

261

port: integer; what port to announce

238

262

TXT: list of strings; TXT record for the service

239

263

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

246

270

bus: dbus.SystemBus()

247

271

"""

248

272

249

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

250

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

251

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

252

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):

253

284

self.interface = interface

254

285

self.name = name

255

286

self.type = servicetype

265

296

self.bus = bus

266

297

self.entry_group_state_changed_match = None

267

298

268

def rename(self):

299

def rename(self, remove=True):

269

300

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

270

301

if self.rename_count >= self.max_renames:

271

302

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

272

303

" after %i retries, exiting.",

273

304

self.rename_count)

274

305

raise AvahiServiceError("Too many renames")

275

self.name = unicode(self.server

276

.GetAlternativeServiceName(self.name))

306

self.name = str(

307

self.server.GetAlternativeServiceName(self.name))

308

self.rename_count += 1

277

309

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

278

310

self.name)

279

self.remove()

311

if remove:

312

self.remove()

280

313

try:

281

314

self.add()

282

315

except dbus.exceptions.DBusException as error:

283

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

284

self.cleanup()

285

os._exit(1)

286

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)

287

324

288

325

def remove(self):

289

326

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

327

364

self.rename()

328

365

elif state == avahi.ENTRY_GROUP_FAILURE:

329

366

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

330

unicode(error))

331

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

332

.format(error))

367

str(error))

368

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

333

369

334

370

def cleanup(self):

335

371

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

345

381

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

346

382

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

347

383

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

348

bad_states = { avahi.SERVER_INVALID:

349

"Zeroconf server invalid",

350

avahi.SERVER_REGISTERING: None,

351

avahi.SERVER_COLLISION:

352

"Zeroconf server name collision",

353

avahi.SERVER_FAILURE:

354

"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

}

355

390

if state in bad_states:

356

391

if bad_states[state] is not None:

357

392

if error is None:

376

411

follow_name_owner_changes=True),

377

412

avahi.DBUS_INTERFACE_SERVER)

378

413

self.server.connect_to_signal("StateChanged",

379

self.server_state_changed)

414

self.server_state_changed)

380

415

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

381

416

382

417

383

418

class AvahiServiceToSyslog(AvahiService):

384

def rename(self):

419

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

385

420

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

386

ret = AvahiService.rename(self)

387

syslogger.setFormatter(logging.Formatter

388

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

389

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

390

.format(self.name)))

421

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

422

syslogger.setFormatter(logging.Formatter(

423

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

424

.format(self.name)))

391

425

return ret

392

426

393

427

394

def timedelta_to_milliseconds(td):

395

"Convert a datetime.timedelta() to milliseconds"

396

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

397

+ (td.seconds * 1000)

398

+ (td.microseconds // 1000))

399

400

401

428

class Client(object):

402

429

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

403

430

439

466

runtime_expansions: Allowed attributes for runtime expansion.

440

467

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

441

468

disabled, or None

469

server_settings: The server_settings dict from main()

442

470

"""

443

471

444

472

runtime_expansions = ("approval_delay", "approval_duration",

446

474

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

447

475

"last_approval_request", "last_checked_ok",

448

476

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

449

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

450

"extended_timeout": "15m",

451

"interval": "2m",

452

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

453

"host": "",

454

"approval_delay": "0s",

455

"approval_duration": "1s",

456

"approved_by_default": "True",

457

"enabled": "True",

458

}

459

460

def timeout_milliseconds(self):

461

"Return the 'timeout' attribute in milliseconds"

462

return timedelta_to_milliseconds(self.timeout)

463

464

def extended_timeout_milliseconds(self):

465

"Return the 'extended_timeout' attribute in milliseconds"

466

return timedelta_to_milliseconds(self.extended_timeout)

467

468

def interval_milliseconds(self):

469

"Return the 'interval' attribute in milliseconds"

470

return timedelta_to_milliseconds(self.interval)

471

472

def approval_delay_milliseconds(self):

473

return timedelta_to_milliseconds(self.approval_delay)

477

client_defaults = {

478

"timeout": "PT5M",

479

"extended_timeout": "PT15M",

480

"interval": "PT2M",

481

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

482

"host": "",

483

"approval_delay": "PT0S",

484

"approval_duration": "PT1S",

485

"approved_by_default": "True",

486

"enabled": "True",

487

}

474

488

475

489

@staticmethod

476

490

def config_parser(config):

492

506

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

493

507

"enabled")

494

508

509

# Uppercase and remove spaces from fingerprint for later

510

# comparison purposes with return value from the

511

# fingerprint() function

495

512

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

496

513

.replace(" ", ""))

497

514

if "secret" in section:

502

519

"rb") as secfile:

503

520

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

504

521

else:

505

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

522

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

506

523

.format(section))

507

524

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

508

525

client["extended_timeout"] = string_to_delta(

519

536

520

537

return settings

521

538

522

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

539

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

523

540

self.name = name

541

if server_settings is None:

542

server_settings = {}

543

self.server_settings = server_settings

524

544

# adding all client settings

525

for setting, value in settings.iteritems():

545

for setting, value in settings.items():

526

546

setattr(self, setting, value)

527

547

528

548

if self.enabled:

536

556

self.expires = None

537

557

538

558

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

539

# Uppercase and remove spaces from fingerprint for later

540

# comparison purposes with return value from the fingerprint()

541

# function

542

559

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

543

560

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

544

561

datetime.datetime.utcnow())

551

568

self.current_checker_command = None

552

569

self.approved = None

553

570

self.approvals_pending = 0

554

self.changedstate = (multiprocessing_manager

555

.Condition(multiprocessing_manager

556

.Lock()))

557

self.client_structure = [attr for attr in

558

self.__dict__.iterkeys()

571

self.changedstate = multiprocessing_manager.Condition(

572

multiprocessing_manager.Lock())

573

self.client_structure = [attr

574

for attr in self.__dict__.iterkeys()

559

575

if not attr.startswith("_")]

560

576

self.client_structure.append("client_structure")

561

577

562

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

563

lambda obj:

564

isinstance(obj,

565

property)):

578

for name, t in inspect.getmembers(

579

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

566

580

if not name.startswith("_"):

567

581

self.client_structure.append(name)

568

582

610

624

# and every interval from then on.

611

625

if self.checker_initiator_tag is not None:

612

626

gobject.source_remove(self.checker_initiator_tag)

613

self.checker_initiator_tag = (gobject.timeout_add

614

(self.interval_milliseconds(),

615

self.start_checker))

627

self.checker_initiator_tag = gobject.timeout_add(

628

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

629

self.start_checker)

616

630

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

617

631

if self.disable_initiator_tag is not None:

618

632

gobject.source_remove(self.disable_initiator_tag)

619

self.disable_initiator_tag = (gobject.timeout_add

620

(self.timeout_milliseconds(),

621

self.disable))

633

self.disable_initiator_tag = gobject.timeout_add(

634

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

622

635

# Also start a new checker *right now*.

623

636

self.start_checker()

624

637

633

646

vars(self))

634

647

self.checked_ok()

635

648

else:

636

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

637

vars(self))

649

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

638

650

else:

639

651

self.last_checker_status = -1

640

652

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

654

666

gobject.source_remove(self.disable_initiator_tag)

655

667

self.disable_initiator_tag = None

656

668

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

657

self.disable_initiator_tag = (gobject.timeout_add

658

(timedelta_to_milliseconds

659

(timeout), self.disable))

669

self.disable_initiator_tag = gobject.timeout_add(

670

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

660

671

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

661

672

662

673

def need_approval(self):

679

690

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

680

691

try:

681

692

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

682

except (AttributeError, OSError) as error:

683

if (isinstance(error, OSError)

684

and error.errno != errno.ECHILD):

685

raise error

693

except AttributeError:

694

pass

695

except OSError as error:

696

if error.errno != errno.ECHILD:

697

raise

686

698

else:

687

699

if pid:

688

700

logger.warning("Checker was a zombie")

692

704

# Start a new checker if needed

693

705

if self.checker is None:

694

706

# Escape attributes for the shell

695

escaped_attrs = dict(

696

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

697

for attr in

698

self.runtime_expansions)

707

escaped_attrs = {

708

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

709

for attr in self.runtime_expansions }

699

710

try:

700

711

command = self.checker_command % escaped_attrs

701

712

except TypeError as error:

702

713

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

703

self.checker_command, exc_info=error)

704

return True # Try again later

714

self.checker_command,

715

exc_info=error)

716

return True # Try again later

705

717

self.current_checker_command = command

706

718

try:

707

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

708

command, self.name)

719

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

720

self.name)

709

721

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

710

722

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

711

723

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

712

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 })

713

733

self.checker = subprocess.Popen(command,

714

734

close_fds=True,

715

shell=True, cwd="/")

735

shell=True,

736

cwd="/",

737

**popen_args)

716

738

except OSError as error:

717

739

logger.error("Failed to start subprocess",

718

740

exc_info=error)

719

self.checker_callback_tag = (gobject.child_watch_add

720

(self.checker.pid,

721

self.checker_callback,

722

data=command))

741

return True

742

self.checker_callback_tag = gobject.child_watch_add(

743

self.checker.pid, self.checker_callback, data=command)

723

744

# The checker may have completed before the gobject

724

745

# watch was added. Check for this.

725

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

746

try:

747

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

748

except OSError as error:

749

if error.errno == errno.ECHILD:

750

# This should never happen

751

logger.error("Child process vanished",

752

exc_info=error)

753

return True

754

raise

726

755

if pid:

727

756

gobject.source_remove(self.checker_callback_tag)

728

757

self.checker_callback(pid, status, command)

748

777

self.checker = None

749

778

750

779

751

def dbus_service_property(dbus_interface, signature="v",

752

access="readwrite", byte_arrays=False):

780

def dbus_service_property(dbus_interface,

781

signature="v",

782

access="readwrite",

783

byte_arrays=False):

753

784

"""Decorators for marking methods of a DBusObjectWithProperties to

754

785

become properties on the D-Bus.

755

786

764

795

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

765

796

if byte_arrays and signature != "ay":

766

797

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

767

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

798

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

799

768

800

def decorator(func):

769

801

func._dbus_is_property = True

770

802

func._dbus_interface = dbus_interface

775

807

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

776

808

func._dbus_get_args_options = {'byte_arrays': byte_arrays }

777

809

return func

810

778

811

return decorator

779

812

780

813

789

822

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

790

823

"false"}

791

824

"""

825

792

826

def decorator(func):

793

827

func._dbus_is_interface = True

794

828

func._dbus_interface = dbus_interface

795

829

func._dbus_name = dbus_interface

796

830

return func

831

797

832

return decorator

798

833

799

834

801

836

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

802

837

Usage:

803

838

839

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

840

"org.freedesktop.DBus.Property."

841

"EmitsChangedSignal": "false"})

804

842

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

805

843

access="r")

806

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

807

"org.freedesktop.DBus.Property."

808

"EmitsChangedSignal": "false"})

809

844

def Property_dbus_property(self):

810

845

return dbus.Boolean(False)

811

846

"""

847

812

848

def decorator(func):

813

849

func._dbus_annotations = annotations

814

850

return func

851

815

852

return decorator

816

853

817

854

818

855

class DBusPropertyException(dbus.exceptions.DBusException):

819

856

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

820

857

"""

821

def __unicode__(self):

822

return unicode(str(self))

858

pass

823

859

824

860

825

861

class DBusPropertyAccessException(DBusPropertyException):

849

885

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

850

886

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

851

887

"""

852

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

888

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

853

889

False)

854

890

855

891

def _get_all_dbus_things(self, thing):

856

892

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

857

893

"""

858

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

859

name),

894

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

860

895

athing.__get__(self))

861

896

for cls in self.__class__.__mro__

862

897

for name, athing in

863

inspect.getmembers(cls,

864

self._is_dbus_thing(thing)))

898

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

865

899

866

900

def _get_dbus_property(self, interface_name, property_name):

867

901

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

868

902

property with the specified name and interface.

869

903

"""

870

for cls in self.__class__.__mro__:

871

for name, value in (inspect.getmembers

872

(cls,

873

self._is_dbus_thing("property"))):

904

for cls in self.__class__.__mro__:

905

for name, value in inspect.getmembers(

906

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

874

907

if (value._dbus_name == property_name

875

908

and value._dbus_interface == interface_name):

876

909

return value.__get__(self)

877

910

878

911

# No such property

879

raise DBusPropertyNotFound(self.dbus_object_path + ":"

880

+ interface_name + "."

881

+ property_name)

912

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

913

self.dbus_object_path, interface_name, property_name))

882

914

883

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

915

@dbus.service.method(dbus.PROPERTIES_IFACE,

916

in_signature="ss",

884

917

out_signature="v")

885

918

def Get(self, interface_name, property_name):

886

919

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

904

937

# The byte_arrays option is not supported yet on

905

938

# signatures other than "ay".

906

939

if prop._dbus_signature != "ay":

907

raise ValueError

940

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

941

"'ay' signature {!r}"

942

.format(prop._dbus_signature))

908

943

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

909

944

for byte in value))

910

945

prop(value)

911

946

912

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

947

@dbus.service.method(dbus.PROPERTIES_IFACE,

948

in_signature="s",

913

949

out_signature="a{sv}")

914

950

def GetAll(self, interface_name):

915

951

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

930

966

if not hasattr(value, "variant_level"):

931

967

properties[name] = value

932

968

continue

933

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

934

value.variant_level+1)

969

properties[name] = type(value)(

970

value, variant_level = value.variant_level + 1)

935

971

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

936

972

973

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

974

def PropertiesChanged(self, interface_name, changed_properties,

975

invalidated_properties):

976

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

977

standard.

978

"""

979

pass

980

937

981

@dbus.service.method(dbus.INTROSPECTABLE_IFACE,

938

982

out_signature="s",

939

983

path_keyword='object_path',

947

991

connection)

948

992

try:

949

993

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

994

950

995

def make_tag(document, name, prop):

951

996

e = document.createElement("property")

952

997

e.setAttribute("name", name)

953

998

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

954

999

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

955

1000

return e

1001

956

1002

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

957

1003

# Add property tags

958

1004

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

970

1016

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

971

1017

and prop._dbus_interface

972

1018

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

973

annots.update(getattr

974

(prop,

975

"_dbus_annotations",

976

{}))

977

for name, value in annots.iteritems():

1019

annots.update(getattr(

1020

prop, "_dbus_annotations", {}))

1021

for name, value in annots.items():

978

1022

ann_tag = document.createElement(

979

1023

"annotation")

980

1024

ann_tag.setAttribute("name", name)

983

1027

# Add interface annotation tags

984

1028

for annotation, value in dict(

985

1029

itertools.chain.from_iterable(

986

annotations().iteritems()

987

for name, annotations in

988

self._get_all_dbus_things("interface")

1030

annotations().items()

1031

for name, annotations

1032

in self._get_all_dbus_things("interface")

989

1033

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

990

)).iteritems():

1034

)).items():

991

1035

ann_tag = document.createElement("annotation")

992

1036

ann_tag.setAttribute("name", annotation)

993

1037

ann_tag.setAttribute("value", value)

1020

1064

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

1021

1065

if dt is None:

1022

1066

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

1023

return dbus.String(dt.isoformat(),

1024

variant_level=variant_level)

1067

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

1025

1068

1026

1069

1027

1070

def alternate_dbus_interfaces(alt_interface_names, deprecate=True):

1047

1090

(from DBusObjectWithProperties) and interfaces (from the

1048

1091

dbus_interface_annotations decorator).

1049

1092

"""

1093

1050

1094

def wrapper(cls):

1051

1095

for orig_interface_name, alt_interface_name in (

1052

alt_interface_names.iteritems()):

1096

alt_interface_names.items()):

1053

1097

attr = {}

1054

1098

interface_names = set()

1055

1099

# Go though all attributes of the class

1057

1101

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

1058

1102

# with the wrong interface name

1059

1103

if (not hasattr(attribute, "_dbus_interface")

1060

or not attribute._dbus_interface

1061

.startswith(orig_interface_name)):

1104

or not attribute._dbus_interface.startswith(

1105

orig_interface_name)):

1062

1106

continue

1063

1107

# Create an alternate D-Bus interface name based on

1064

1108

# the current name

1065

alt_interface = (attribute._dbus_interface

1066

.replace(orig_interface_name,

1067

alt_interface_name))

1109

alt_interface = attribute._dbus_interface.replace(

1110

orig_interface_name, alt_interface_name)

1068

1111

interface_names.add(alt_interface)

1069

1112

# Is this a D-Bus signal?

1070

1113

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

1071

# Extract the original non-method function by

1072

# black magic

1114

# Extract the original non-method undecorated

1115

# function by black magic

1073

1116

nonmethod_func = (dict(

1074

zip(attribute.func_code.co_freevars,

1075

attribute.__closure__))["func"]

1076

.cell_contents)

1117

zip(attribute.func_code.co_freevars,

1118

attribute.__closure__))

1119

["func"].cell_contents)

1077

1120

# Create a new, but exactly alike, function

1078

1121

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

1079

1122

# with the alternate D-Bus interface name

1080

new_function = (dbus.service.signal

1081

(alt_interface,

1082

attribute._dbus_signature)

1123

new_function = (dbus.service.signal(

1124

alt_interface, attribute._dbus_signature)

1083

1125

(types.FunctionType(

1084

nonmethod_func.func_code,

1085

nonmethod_func.func_globals,

1086

nonmethod_func.func_name,

1087

nonmethod_func.func_defaults,

1088

nonmethod_func.func_closure)))

1126

nonmethod_func.func_code,

1127

nonmethod_func.func_globals,

1128

nonmethod_func.func_name,

1129

nonmethod_func.func_defaults,

1130

nonmethod_func.func_closure)))

1089

1131

# Copy annotations, if any

1090

1132

try:

1091

new_function._dbus_annotations = (

1092

dict(attribute._dbus_annotations))

1133

new_function._dbus_annotations = dict(

1134

attribute._dbus_annotations)

1093

1135

except AttributeError:

1094

1136

pass

1095

1137

# Define a creator of a function to call both the

1100

1142

"""This function is a scope container to pass

1101

1143

func1 and func2 to the "call_both" function

1102

1144

outside of its arguments"""

1145

1103

1146

def call_both(*args, **kwargs):

1104

1147

"""This function will emit two D-Bus

1105

1148

signals by calling func1 and func2"""

1106

1149

func1(*args, **kwargs)

1107

1150

func2(*args, **kwargs)

1151

1108

1152

return call_both

1109

1153

# Create the "call_both" function and add it to

1110

1154

# the class

1115

1159

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

1116

1160

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

1117

1161

# to the class.

1118

attr[attrname] = (dbus.service.method

1119

(alt_interface,

1120

attribute._dbus_in_signature,

1121

attribute._dbus_out_signature)

1122

(types.FunctionType

1123

(attribute.func_code,

1124

attribute.func_globals,

1125

attribute.func_name,

1126

attribute.func_defaults,

1127

attribute.func_closure)))

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)))

1128

1172

# Copy annotations, if any

1129

1173

try:

1130

attr[attrname]._dbus_annotations = (

1131

dict(attribute._dbus_annotations))

1174

attr[attrname]._dbus_annotations = dict(

1175

attribute._dbus_annotations)

1132

1176

except AttributeError:

1133

1177

pass

1134

1178

# Is this a D-Bus property?

1137

1181

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

1138

1182

# property with the alternate D-Bus interface

1139

1183

# name. Add it to the class.

1140

attr[attrname] = (dbus_service_property

1141

(alt_interface,

1142

attribute._dbus_signature,

1143

attribute._dbus_access,

1144

attribute

1145

._dbus_get_args_options

1146

["byte_arrays"])

1147

(types.FunctionType

1148

(attribute.func_code,

1149

attribute.func_globals,

1150

attribute.func_name,

1151

attribute.func_defaults,

1152

attribute.func_closure)))

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)))

1153

1195

# Copy annotations, if any

1154

1196

try:

1155

attr[attrname]._dbus_annotations = (

1156

dict(attribute._dbus_annotations))

1197

attr[attrname]._dbus_annotations = dict(

1198

attribute._dbus_annotations)

1157

1199

except AttributeError:

1158

1200

pass

1159

1201

# Is this a D-Bus interface?

1162

1204

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

1163

1205

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

1164

1206

# to the class.

1165

attr[attrname] = (dbus_interface_annotations

1166

(alt_interface)

1167

(types.FunctionType

1168

(attribute.func_code,

1169

attribute.func_globals,

1170

attribute.func_name,

1171

attribute.func_defaults,

1172

attribute.func_closure)))

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)))

1173

1214

if deprecate:

1174

1215

# Deprecate all alternate interfaces

1175

iname="_AlternateDBusNames_interface_annotation{0}"

1216

iname="_AlternateDBusNames_interface_annotation{}"

1176

1217

for interface_name in interface_names:

1218

1177

1219

@dbus_interface_annotations(interface_name)

1178

1220

def func(self):

1179

1221

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

1180

"true" }

1222

"true" }

1181

1223

# Find an unused name

1182

1224

for aname in (iname.format(i)

1183

1225

for i in itertools.count()):

1187

1229

if interface_names:

1188

1230

# Replace the class with a new subclass of it with

1189

1231

# methods, signals, etc. as created above.

1190

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

1191

(cls,), attr)

1232

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

1233

(cls, ), attr)

1192

1234

return cls

1235

1193

1236

return wrapper

1194

1237

1195

1238

1196

1239

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

1197

"se.bsnet.fukt.Mandos"})

1240

"se.bsnet.fukt.Mandos"})

1198

1241

class ClientDBus(Client, DBusObjectWithProperties):

1199

1242

"""A Client class using D-Bus

1200

1243

1204

1247

"""

1205

1248

1206

1249

runtime_expansions = (Client.runtime_expansions

1207

+ ("dbus_object_path",))

1250

+ ("dbus_object_path", ))

1251

1252

_interface = "se.recompile.Mandos.Client"

1208

1253

1209

1254

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

1210

1255

1213

1258

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

1214

1259

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

1215

1260

# the D-Bus

1216

client_object_name = unicode(self.name).translate(

1261

client_object_name = str(self.name).translate(

1217

1262

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

1218

1263

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

1219

self.dbus_object_path = (dbus.ObjectPath

1220

("/clients/" + client_object_name))

1264

self.dbus_object_path = dbus.ObjectPath(

1265

"/clients/" + client_object_name)

1221

1266

DBusObjectWithProperties.__init__(self, self.bus,

1222

1267

self.dbus_object_path)

1223

1268

1224

def notifychangeproperty(transform_func,

1225

dbus_name, type_func=lambda x: x,

1226

variant_level=1):

1269

def notifychangeproperty(transform_func, dbus_name,

1270

type_func=lambda x: x,

1271

variant_level=1,

1272

invalidate_only=False,

1273

_interface=_interface):

1227

1274

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

1228

1275

its changes to DBus.

1229

1276

1234

1281

to the D-Bus. Default: no transform

1235

1282

variant_level: D-Bus variant level. Default: 1

1236

1283

"""

1237

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

1284

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

1285

1238

1286

def setter(self, value):

1239

1287

if hasattr(self, "dbus_object_path"):

1240

1288

if (not hasattr(self, attrname) or

1241

1289

type_func(getattr(self, attrname, None))

1242

1290

!= type_func(value)):

1243

dbus_value = transform_func(type_func(value),

1244

variant_level

1245

=variant_level)

1246

self.PropertyChanged(dbus.String(dbus_name),

1247

dbus_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())

1248

1306

setattr(self, attrname, value)

1249

1307

1250

1308

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

1256

1314

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

1257

1315

last_enabled = notifychangeproperty(datetime_to_dbus,

1258

1316

"LastEnabled")

1259

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

1260

type_func = lambda checker:

1261

checker is not None)

1317

checker = notifychangeproperty(

1318

dbus.Boolean, "CheckerRunning",

1319

type_func = lambda checker: checker is not None)

1262

1320

last_checked_ok = notifychangeproperty(datetime_to_dbus,

1263

1321

"LastCheckedOK")

1264

1322

last_checker_status = notifychangeproperty(dbus.Int16,

1267

1325

datetime_to_dbus, "LastApprovalRequest")

1268

1326

approved_by_default = notifychangeproperty(dbus.Boolean,

1269

1327

"ApprovedByDefault")

1270

approval_delay = notifychangeproperty(dbus.UInt64,

1271

"ApprovalDelay",

1272

type_func =

1273

timedelta_to_milliseconds)

1328

approval_delay = notifychangeproperty(

1329

dbus.UInt64, "ApprovalDelay",

1330

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

1274

1331

approval_duration = notifychangeproperty(

1275

1332

dbus.UInt64, "ApprovalDuration",

1276

type_func = timedelta_to_milliseconds)

1333

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

1277

1334

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

1278

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

1279

type_func =

1280

timedelta_to_milliseconds)

1335

timeout = notifychangeproperty(

1336

dbus.UInt64, "Timeout",

1337

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

1281

1338

extended_timeout = notifychangeproperty(

1282

1339

dbus.UInt64, "ExtendedTimeout",

1283

type_func = timedelta_to_milliseconds)

1284

interval = notifychangeproperty(dbus.UInt64,

1285

"Interval",

1286

type_func =

1287

timedelta_to_milliseconds)

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)

1288

1344

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

1345

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

1346

invalidate_only=True)

1289

1347

1290

1348

del notifychangeproperty

1291

1349

1318

1376

*args, **kwargs)

1319

1377

1320

1378

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

1321

old_checker = self.checker

1322

if self.checker is not None:

1323

old_checker_pid = self.checker.pid

1324

else:

1325

old_checker_pid = None

1379

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

1326

1380

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

1327

1381

# Only if new checker process was started

1328

1382

if (self.checker is not None

1337

1391

1338

1392

def approve(self, value=True):

1339

1393

self.approved = value

1340

gobject.timeout_add(timedelta_to_milliseconds

1341

(self.approval_duration),

1342

self._reset_approved)

1394

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

1395

* 1000), self._reset_approved)

1343

1396

self.send_changedstate()

1344

1397

1345

1398

## D-Bus methods, signals & properties

1346

_interface = "se.recompile.Mandos.Client"

1347

1399

1348

1400

## Interfaces

1349

1401

1350

@dbus_interface_annotations(_interface)

1351

def _foo(self):

1352

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

1353

"false"}

1354

1355

1402

## Signals

1356

1403

1357

1404

# CheckerCompleted - signal

1367

1414

pass

1368

1415

1369

1416

# PropertyChanged - signal

1417

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

1370

1418

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

1371

1419

def PropertyChanged(self, property, value):

1372

1420

"D-Bus signal"

1436

1484

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

1437

1485

1438

1486

# ApprovedByDefault - property

1439

@dbus_service_property(_interface, signature="b",

1487

@dbus_service_property(_interface,

1488

signature="b",

1440

1489

access="readwrite")

1441

1490

def ApprovedByDefault_dbus_property(self, value=None):

1442

1491

if value is None: # get

1444

1493

self.approved_by_default = bool(value)

1445

1494

1446

1495

# ApprovalDelay - property

1447

@dbus_service_property(_interface, signature="t",

1496

@dbus_service_property(_interface,

1497

signature="t",

1448

1498

access="readwrite")

1449

1499

def ApprovalDelay_dbus_property(self, value=None):

1450

1500

if value is None: # get

1451

return dbus.UInt64(self.approval_delay_milliseconds())

1501

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

1502

* 1000)

1452

1503

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

1453

1504

1454

1505

# ApprovalDuration - property

1455

@dbus_service_property(_interface, signature="t",

1506

@dbus_service_property(_interface,

1507

signature="t",

1456

1508

access="readwrite")

1457

1509

def ApprovalDuration_dbus_property(self, value=None):

1458

1510

if value is None: # get

1459

return dbus.UInt64(timedelta_to_milliseconds(

1460

self.approval_duration))

1511

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

1512

* 1000)

1461

1513

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

1462

1514

1463

1515

# Name - property

1471

1523

return dbus.String(self.fingerprint)

1472

1524

1473

1525

# Host - property

1474

@dbus_service_property(_interface, signature="s",

1526

@dbus_service_property(_interface,

1527

signature="s",

1475

1528

access="readwrite")

1476

1529

def Host_dbus_property(self, value=None):

1477

1530

if value is None: # get

1478

1531

return dbus.String(self.host)

1479

self.host = unicode(value)

1532

self.host = str(value)

1480

1533

1481

1534

# Created - property

1482

1535

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

1489

1542

return datetime_to_dbus(self.last_enabled)

1490

1543

1491

1544

# Enabled - property

1492

@dbus_service_property(_interface, signature="b",

1545

@dbus_service_property(_interface,

1546

signature="b",

1493

1547

access="readwrite")

1494

1548

def Enabled_dbus_property(self, value=None):

1495

1549

if value is None: # get

1500

1554

self.disable()

1501

1555

1502

1556

# LastCheckedOK - property

1503

@dbus_service_property(_interface, signature="s",

1557

@dbus_service_property(_interface,

1558

signature="s",

1504

1559

access="readwrite")

1505

1560

def LastCheckedOK_dbus_property(self, value=None):

1506

1561

if value is not None:

1509

1564

return datetime_to_dbus(self.last_checked_ok)

1510

1565

1511

1566

# LastCheckerStatus - property

1512

@dbus_service_property(_interface, signature="n",

1513

access="read")

1567

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

1514

1568

def LastCheckerStatus_dbus_property(self):

1515

1569

return dbus.Int16(self.last_checker_status)

1516

1570

1525

1579

return datetime_to_dbus(self.last_approval_request)

1526

1580

1527

1581

# Timeout - property

1528

@dbus_service_property(_interface, signature="t",

1582

@dbus_service_property(_interface,

1583

signature="t",

1529

1584

access="readwrite")

1530

1585

def Timeout_dbus_property(self, value=None):

1531

1586

if value is None: # get

1532

return dbus.UInt64(self.timeout_milliseconds())

1587

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

1533

1588

old_timeout = self.timeout

1534

1589

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

1535

1590

# Reschedule disabling

1544

1599

is None):

1545

1600

return

1546

1601

gobject.source_remove(self.disable_initiator_tag)

1547

self.disable_initiator_tag = (

1548

gobject.timeout_add(

1549

timedelta_to_milliseconds(self.expires - now),

1550

self.disable))

1602

self.disable_initiator_tag = gobject.timeout_add(

1603

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

1604

self.disable)

1551

1605

1552

1606

# ExtendedTimeout - property

1553

@dbus_service_property(_interface, signature="t",

1607

@dbus_service_property(_interface,

1608

signature="t",

1554

1609

access="readwrite")

1555

1610

def ExtendedTimeout_dbus_property(self, value=None):

1556

1611

if value is None: # get

1557

return dbus.UInt64(self.extended_timeout_milliseconds())

1612

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

1613

* 1000)

1558

1614

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

1559

1615

1560

1616

# Interval - property

1561

@dbus_service_property(_interface, signature="t",

1617

@dbus_service_property(_interface,

1618

signature="t",

1562

1619

access="readwrite")

1563

1620

def Interval_dbus_property(self, value=None):

1564

1621

if value is None: # get

1565

return dbus.UInt64(self.interval_milliseconds())

1622

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

1566

1623

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

1567

1624

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

1568

1625

return

1569

1626

if self.enabled:

1570

1627

# Reschedule checker run

1571

1628

gobject.source_remove(self.checker_initiator_tag)

1572

self.checker_initiator_tag = (gobject.timeout_add

1573

(value, self.start_checker))

1574

self.start_checker() # Start one now, too

1629

self.checker_initiator_tag = gobject.timeout_add(

1630

value, self.start_checker)

1631

self.start_checker() # Start one now, too

1575

1632

1576

1633

# Checker - property

1577

@dbus_service_property(_interface, signature="s",

1634

@dbus_service_property(_interface,

1635

signature="s",

1578

1636

access="readwrite")

1579

1637

def Checker_dbus_property(self, value=None):

1580

1638

if value is None: # get

1581

1639

return dbus.String(self.checker_command)

1582

self.checker_command = unicode(value)

1640

self.checker_command = str(value)

1583

1641

1584

1642

# CheckerRunning - property

1585

@dbus_service_property(_interface, signature="b",

1643

@dbus_service_property(_interface,

1644

signature="b",

1586

1645

access="readwrite")

1587

1646

def CheckerRunning_dbus_property(self, value=None):

1588

1647

if value is None: # get

1598

1657

return self.dbus_object_path # is already a dbus.ObjectPath

1599

1658

1600

1659

# Secret = property

1601

@dbus_service_property(_interface, signature="ay",

1602

access="write", byte_arrays=True)

1660

@dbus_service_property(_interface,

1661

signature="ay",

1662

access="write",

1663

byte_arrays=True)

1603

1664

def Secret_dbus_property(self, value):

1604

self.secret = str(value)

1665

self.secret = bytes(value)

1605

1666

1606

1667

del _interface

1607

1668

1611

1672

self._pipe = child_pipe

1612

1673

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

1613

1674

if not self._pipe.recv():

1614

raise KeyError()

1675

raise KeyError(fpr)

1615

1676

1616

1677

def __getattribute__(self, name):

1617

1678

if name == '_pipe':

1621

1682

if data[0] == 'data':

1622

1683

return data[1]

1623

1684

if data[0] == 'function':

1685

1624

1686

def func(*args, **kwargs):

1625

1687

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

1626

1688

return self._pipe.recv()[1]

1689

1627

1690

return func

1628

1691

1629

1692

def __setattr__(self, name, value):

1641

1704

def handle(self):

1642

1705

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

1643

1706

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

1644

unicode(self.client_address))

1707

str(self.client_address))

1645

1708

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

1646

1709

self.server.child_pipe.fileno())

1647

1710

1648

session = (gnutls.connection

1649

.ClientSession(self.request,

1650

gnutls.connection

1651

.X509Credentials()))

1711

session = gnutls.connection.ClientSession(

1712

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

1652

1713

1653

1714

# Note: gnutls.connection.X509Credentials is really a

1654

1715

# generic GnuTLS certificate credentials object so long as

1663

1724

priority = self.server.gnutls_priority

1664

1725

if priority is None:

1665

1726

priority = "NORMAL"

1666

(gnutls.library.functions

1667

.gnutls_priority_set_direct(session._c_object,

1668

priority, None))

1727

gnutls.library.functions.gnutls_priority_set_direct(

1728

session._c_object, priority, None)

1669

1729

1670

1730

# Start communication using the Mandos protocol

1671

1731

# Get protocol number

1673

1733

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

1674

1734

try:

1675

1735

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

1676

raise RuntimeError

1736

raise RuntimeError(line)

1677

1737

except (ValueError, IndexError, RuntimeError) as error:

1678

1738

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

1679

1739

return

1691

1751

approval_required = False

1692

1752

try:

1693

1753

try:

1694

fpr = self.fingerprint(self.peer_certificate

1695

(session))

1754

fpr = self.fingerprint(

1755

self.peer_certificate(session))

1696

1756

except (TypeError,

1697

1757

gnutls.errors.GNUTLSError) as error:

1698

1758

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

1713

1773

while True:

1714

1774

if not client.enabled:

1715

1775

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

1716

client.name)

1776

client.name)

1717

1777

if self.server.use_dbus:

1718

1778

# Emit D-Bus signal

1719

1779

client.Rejected("Disabled")

1728

1788

if self.server.use_dbus:

1729

1789

# Emit D-Bus signal

1730

1790

client.NeedApproval(

1731

client.approval_delay_milliseconds(),

1732

client.approved_by_default)

1791

client.approval_delay.total_seconds()

1792

* 1000, client.approved_by_default)

1733

1793

else:

1734

1794

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

1735

1795

client.name)

1741

1801

#wait until timeout or approved

1742

1802

time = datetime.datetime.now()

1743

1803

client.changedstate.acquire()

1744

client.changedstate.wait(

1745

float(timedelta_to_milliseconds(delay)

1746

/ 1000))

1804

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

1747

1805

client.changedstate.release()

1748

1806

time2 = datetime.datetime.now()

1749

1807

if (time2 - time) >= delay:

1768

1826

logger.warning("gnutls send failed",

1769

1827

exc_info=error)

1770

1828

return

1771

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

1772

sent, len(client.secret)

1773

- (sent_size + sent))

1829

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

1830

len(client.secret) - (sent_size

1831

+ sent))

1774

1832

sent_size += sent

1775

1833

1776

1834

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

1793

1851

def peer_certificate(session):

1794

1852

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

1795

1853

# If not an OpenPGP certificate...

1796

if (gnutls.library.functions

1797

.gnutls_certificate_type_get(session._c_object)

1854

if (gnutls.library.functions.gnutls_certificate_type_get(

1855

session._c_object)

1798

1856

!= gnutls.library.constants.GNUTLS_CRT_OPENPGP):

1799

1857

# ...do the normal thing

1800

1858

return session.peer_certificate

1814

1872

def fingerprint(openpgp):

1815

1873

"Convert an OpenPGP bytestring to a hexdigit fingerprint"

1816

1874

# New GnuTLS "datum" with the OpenPGP public key

1817

datum = (gnutls.library.types

1818

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

1819

ctypes.POINTER

1820

(ctypes.c_ubyte)),

1821

ctypes.c_uint(len(openpgp))))

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)))

1822

1879

# New empty GnuTLS certificate

1823

1880

crt = gnutls.library.types.gnutls_openpgp_crt_t()

1824

(gnutls.library.functions

1825

.gnutls_openpgp_crt_init(ctypes.byref(crt)))

1881

gnutls.library.functions.gnutls_openpgp_crt_init(

1882

ctypes.byref(crt))

1826

1883

# Import the OpenPGP public key into the certificate

1827

(gnutls.library.functions

1828

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

1829

gnutls.library.constants

1830

.GNUTLS_OPENPGP_FMT_RAW))

1884

gnutls.library.functions.gnutls_openpgp_crt_import(

1885

crt, ctypes.byref(datum),

1886

gnutls.library.constants.GNUTLS_OPENPGP_FMT_RAW)

1831

1887

# Verify the self signature in the key

1832

1888

crtverify = ctypes.c_uint()

1833

(gnutls.library.functions

1834

.gnutls_openpgp_crt_verify_self(crt, 0,

1835

ctypes.byref(crtverify)))

1889

gnutls.library.functions.gnutls_openpgp_crt_verify_self(

1890

crt, 0, ctypes.byref(crtverify))

1836

1891

if crtverify.value != 0:

1837

1892

gnutls.library.functions.gnutls_openpgp_crt_deinit(crt)

1838

raise (gnutls.errors.CertificateSecurityError

1839

("Verify failed"))

1893

raise gnutls.errors.CertificateSecurityError(

1894

"Verify failed")

1840

1895

# New buffer for the fingerprint

1841

1896

buf = ctypes.create_string_buffer(20)

1842

1897

buf_len = ctypes.c_size_t()

1843

1898

# Get the fingerprint from the certificate into the buffer

1844

(gnutls.library.functions

1845

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

1846

ctypes.byref(buf_len)))

1899

gnutls.library.functions.gnutls_openpgp_crt_get_fingerprint(

1900

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

1847

1901

# Deinit the certificate

1848

1902

gnutls.library.functions.gnutls_openpgp_crt_deinit(crt)

1849

1903

# Convert the buffer to a Python bytestring

1855

1909

1856

1910

class MultiprocessingMixIn(object):

1857

1911

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

1912

1858

1913

def sub_process_main(self, request, address):

1859

1914

try:

1860

1915

self.finish_request(request, address)

1872

1927

1873

1928

class MultiprocessingMixInWithPipe(MultiprocessingMixIn, object):

1874

1929

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

1930

1875

1931

def process_request(self, request, client_address):

1876

1932

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

1877

1933

1886

1942

1887

1943

def add_pipe(self, parent_pipe, proc):

1888

1944

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

1889

raise NotImplementedError

1945

raise NotImplementedError()

1890

1946

1891

1947

1892

1948

class IPv6_TCPServer(MultiprocessingMixInWithPipe,

1898

1954

interface: None or a network interface name (string)

1899

1955

use_ipv6: Boolean; to use IPv6 or not

1900

1956

"""

1957

1901

1958

def __init__(self, server_address, RequestHandlerClass,

1902

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

1959

interface=None,

1960

use_ipv6=True,

1961

socketfd=None):

1903

1962

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

1904

1963

creating a new one with socket.socket().

1905

1964

"""

1946

2005

self.interface)

1947

2006

else:

1948

2007

try:

1949

self.socket.setsockopt(socket.SOL_SOCKET,

1950

SO_BINDTODEVICE,

1951

str(self.interface

1952

+ '\0'))

2008

self.socket.setsockopt(

2009

socket.SOL_SOCKET, SO_BINDTODEVICE,

2010

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

1953

2011

except socket.error as error:

1954

2012

if error.errno == errno.EPERM:

1955

logger.error("No permission to"

1956

" bind to interface %s",

1957

self.interface)

2013

logger.error("No permission to bind to"

2014

" interface %s", self.interface)

1958

2015

elif error.errno == errno.ENOPROTOOPT:

1959

2016

logger.error("SO_BINDTODEVICE not available;"

1960

2017

" cannot bind to interface %s",

1961

2018

self.interface)

1962

2019

elif error.errno == errno.ENODEV:

1963

logger.error("Interface %s does not"

1964

" exist, cannot bind",

1965

self.interface)

2020

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

2021

" cannot bind", self.interface)

1966

2022

else:

1967

2023

raise

1968

2024

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

1971

2027

if self.address_family == socket.AF_INET6:

1972

2028

any_address = "::" # in6addr_any

1973

2029

else:

1974

any_address = socket.INADDR_ANY

2030

any_address = "0.0.0.0" # INADDR_ANY

1975

2031

self.server_address = (any_address,

1976

2032

self.server_address[1])

1977

2033

elif not self.server_address[1]:

1978

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

1979

0)

2034

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

1980

2035

# if self.interface:

1981

2036

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

1982

2037

# 0, # port

1996

2051

1997

2052

Assumes a gobject.MainLoop event loop.

1998

2053

"""

2054

1999

2055

def __init__(self, server_address, RequestHandlerClass,

2000

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

2001

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

2056

interface=None,

2057

use_ipv6=True,

2058

clients=None,

2059

gnutls_priority=None,

2060

use_dbus=True,

2061

socketfd=None):

2002

2062

self.enabled = False

2003

2063

self.clients = clients

2004

2064

if self.clients is None:

2010

2070

interface = interface,

2011

2071

use_ipv6 = use_ipv6,

2012

2072

socketfd = socketfd)

2073

2013

2074

def server_activate(self):

2014

2075

if self.enabled:

2015

2076

return socketserver.TCPServer.server_activate(self)

2019

2080

2020

2081

def add_pipe(self, parent_pipe, proc):

2021

2082

# Call "handle_ipc" for both data and EOF events

2022

gobject.io_add_watch(parent_pipe.fileno(),

2023

gobject.IO_IN | gobject.IO_HUP,

2024

functools.partial(self.handle_ipc,

2025

parent_pipe =

2026

parent_pipe,

2027

proc = proc))

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))

2028

2089

2029

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

2030

proc = None, client_object=None):

2090

def handle_ipc(self, source, condition,

2091

parent_pipe=None,

2092

proc = None,

2093

client_object=None):

2031

2094

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

2032

2095

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

2033

2096

# Wait for other process to exit

2056

2119

parent_pipe.send(False)

2057

2120

return False

2058

2121

2059

gobject.io_add_watch(parent_pipe.fileno(),

2060

gobject.IO_IN | gobject.IO_HUP,

2061

functools.partial(self.handle_ipc,

2062

parent_pipe =

2063

parent_pipe,

2064

proc = proc,

2065

client_object =

2066

client))

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))

2067

2129

parent_pipe.send(True)

2068

2130

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

2069

2131

# same fileno

2075

2137

2076

2138

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

2077

2139

funcname)(*args,

2078

**kwargs)))

2140

**kwargs)))

2079

2141

2080

2142

if command == 'getattr':

2081

2143

attrname = request[1]

2082

2144

if callable(client_object.__getattribute__(attrname)):

2083

parent_pipe.send(('function',))

2145

parent_pipe.send(('function', ))

2084

2146

else:

2085

parent_pipe.send(('data', client_object

2086

.__getattribute__(attrname)))

2147

parent_pipe.send((

2148

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

2087

2149

2088

2150

if command == 'setattr':

2089

2151

attrname = request[1]

2093

2155

return True

2094

2156

2095

2157

2158

def rfc3339_duration_to_delta(duration):

2159

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

2160

2161

>>> rfc3339_duration_to_delta("P7D")

2162

datetime.timedelta(7)

2163

>>> rfc3339_duration_to_delta("PT60S")

2164

datetime.timedelta(0, 60)

2165

>>> rfc3339_duration_to_delta("PT60M")

2166

datetime.timedelta(0, 3600)

2167

>>> rfc3339_duration_to_delta("PT24H")

2168

datetime.timedelta(1)

2169

>>> rfc3339_duration_to_delta("P1W")

2170

datetime.timedelta(7)

2171

>>> rfc3339_duration_to_delta("PT5M30S")

2172

datetime.timedelta(0, 330)

2173

>>> rfc3339_duration_to_delta("P1DT3M20S")

2174

datetime.timedelta(1, 200)

2175

"""

2176

2177

# Parsing an RFC 3339 duration with regular expressions is not

2178

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

2179

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

2180

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

2181

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

2182

# avoid excessive use of external libraries.

2183

2184

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

2185

Token = collections.namedtuple("Token", (

2186

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

2187

# a "group" containing digits

2188

"value", # datetime.timedelta or None

2189

"followers")) # Tokens valid after this token

2190

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

2191

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

2192

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

2193

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

2194

datetime.timedelta(seconds=1),

2195

frozenset((token_end, )))

2196

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

2197

datetime.timedelta(minutes=1),

2198

frozenset((token_second, token_end)))

2199

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

2200

datetime.timedelta(hours=1),

2201

frozenset((token_minute, token_end)))

2202

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

2203

None,

2204

frozenset((token_hour, token_minute,

2205

token_second)))

2206

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

2207

datetime.timedelta(days=1),

2208

frozenset((token_time, token_end)))

2209

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

2210

datetime.timedelta(weeks=4),

2211

frozenset((token_day, token_end)))

2212

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

2213

datetime.timedelta(weeks=52),

2214

frozenset((token_month, token_end)))

2215

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

2216

datetime.timedelta(weeks=1),

2217

frozenset((token_end, )))

2218

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

2219

frozenset((token_year, token_month,

2220

token_day, token_time,

2221

token_week)))

2222

# Define starting values

2223

value = datetime.timedelta() # Value so far

2224

found_token = None

2225

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

2226

s = duration # String left to parse

2227

# Loop until end token is found

2228

while found_token is not token_end:

2229

# Search for any currently valid tokens

2230

for token in followers:

2231

match = token.regexp.match(s)

2232

if match is not None:

2233

# Token found

2234

if token.value is not None:

2235

# Value found, parse digits

2236

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

2237

# Add to value so far

2238

value += factor * token.value

2239

# Strip token from string

2240

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

2241

# Go to found token

2242

found_token = token

2243

# Set valid next tokens

2244

followers = found_token.followers

2245

break

2246

else:

2247

# No currently valid tokens were found

2248

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

2249

.format(duration))

2250

# End token found

2251

return value

2252

2253

2096

2254

def string_to_delta(interval):

2097

2255

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

2098

2256

2109

2267

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

2110

2268

datetime.timedelta(0, 330)

2111

2269

"""

2270

2271

try:

2272

return rfc3339_duration_to_delta(interval)

2273

except ValueError:

2274

pass

2275

2112

2276

timevalue = datetime.timedelta(0)

2113

2277

for s in interval.split():

2114

2278

try:

2115

suffix = unicode(s[-1])

2279

suffix = s[-1]

2116

2280

value = int(s[:-1])

2117

2281

if suffix == "d":

2118

2282

delta = datetime.timedelta(value)

2125

2289

elif suffix == "w":

2126

2290

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

2127

2291

else:

2128

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

2129

.format(suffix))

2130

except (ValueError, IndexError) as e:

2292

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

2293

except IndexError as e:

2131

2294

raise ValueError(*(e.args))

2132

2295

timevalue += delta

2133

2296

return timevalue

2149

2312

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

2150

2313

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

2151

2314

raise OSError(errno.ENODEV,

2152

"{0} not a character device"

2315

"{} not a character device"

2153

2316

.format(os.devnull))

2154

2317

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

2155

2318

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

2165

2328

2166

2329

parser = argparse.ArgumentParser()

2167

2330

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

2168

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

2331

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

2169

2332

help="show version number and exit")

2170

2333

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

2171

2334

help="Bind to interface IF")

2177

2340

help="Run self-test")

2178

2341

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

2179

2342

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

2180

" to terminal")

2343

" to terminal", default=None)

2181

2344

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

2182

2345

help="Debug level for stdout output")

2183

2346

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

2190

2353

" files")

2191

2354

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

2192

2355

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

2193

" system bus interface")

2356

" system bus interface", default=None)

2194

2357

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

2195

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

2358

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

2359

default=None)

2196

2360

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

2197

2361

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

2198

" state")

2362

" state", default=None)

2199

2363

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

2200

2364

help="Specify a file descriptor to a network"

2201

2365

" socket to use instead of creating one")

2202

2366

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

2203

2367

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

2368

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

2369

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

2370

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

2371

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

2372

default=None)

2204

2373

2205

2374

options = parser.parse_args()

2206

2375

2207

2376

if options.check:

2208

2377

import doctest

2209

doctest.testmod()

2210

sys.exit()

2378

fail_count, test_count = doctest.testmod()

2379

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

2211

2380

2212

2381

# Default values for config file for server-global settings

2213

2382

server_defaults = { "interface": "",

2215

2384

"port": "",

2216

2385

"debug": "False",

2217

2386

"priority":

2218

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

2387

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

2388

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

2219

2389

"servicename": "Mandos",

2220

2390

"use_dbus": "True",

2221

2391

"use_ipv6": "True",

2222

2392

"debuglevel": "",

2223

2393

"restore": "True",

2224

2394

"socket": "",

2225

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

2226

}

2395

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

2396

"foreground": "False",

2397

"zeroconf": "True",

2398

}

2227

2399

2228

2400

# Parse config file for server-global settings

2229

2401

server_config = configparser.SafeConfigParser(server_defaults)

2230

2402

del server_defaults

2231

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

2232

"mandos.conf"))

2403

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

2233

2404

# Convert the SafeConfigParser object to a dict

2234

2405

server_settings = server_config.defaults()

2235

2406

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

2236

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

2407

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

2237

2408

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

2238

2409

option)

2239

2410

if server_settings["port"]:

2242

2413

if server_settings["socket"]:

2243

2414

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

2244

2415

"socket")

2245

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

2416

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

2246

2417

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

2247

2418

# happen with a supplied network socket.

2248

2419

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

2253

2424

# Override the settings from the config file with command line

2254

2425

# options, if set.

2255

2426

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

2256

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

2257

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

2258

"statedir", "socket"):

2427

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

2428

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

2429

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

2259

2430

value = getattr(options, option)

2260

2431

if value is not None:

2261

2432

server_settings[option] = value

2262

2433

del options

2263

2434

# Force all strings to be unicode

2264

2435

for option in server_settings.keys():

2265

if type(server_settings[option]) is str:

2266

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

2436

if isinstance(server_settings[option], bytes):

2437

server_settings[option] = (server_settings[option]

2438

.decode("utf-8"))

2439

# Force all boolean options to be boolean

2440

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

2441

"foreground", "zeroconf"):

2442

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

2443

# Debug implies foreground

2444

if server_settings["debug"]:

2445

server_settings["foreground"] = True

2267

2446

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

2268

2447

2269

2448

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

2270

2449

2450

if (not server_settings["zeroconf"]

2451

and not (server_settings["port"]

2452

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

2453

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

2454

2271

2455

# For convenience

2272

2456

debug = server_settings["debug"]

2273

2457

debuglevel = server_settings["debuglevel"]

2275

2459

use_ipv6 = server_settings["use_ipv6"]

2276

2460

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

2277

2461

stored_state_file)

2462

foreground = server_settings["foreground"]

2463

zeroconf = server_settings["zeroconf"]

2278

2464

2279

2465

if debug:

2280

2466

initlogger(debug, logging.DEBUG)

2286

2472

initlogger(debug, level)

2287

2473

2288

2474

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

2289

syslogger.setFormatter(logging.Formatter

2290

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

2291

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

2292

.format(server_settings

2293

["servicename"])))

2475

syslogger.setFormatter(

2476

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

2477

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

2478

server_settings["servicename"])))

2294

2479

2295

2480

# Parse config file with clients

2296

2481

client_config = configparser.SafeConfigParser(Client

2301

2486

global mandos_dbus_service

2302

2487

mandos_dbus_service = None

2303

2488

2304

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

2305

server_settings["port"]),

2306

ClientHandler,

2307

interface=(server_settings["interface"]

2308

or None),

2309

use_ipv6=use_ipv6,

2310

gnutls_priority=

2311

server_settings["priority"],

2312

use_dbus=use_dbus,

2313

socketfd=(server_settings["socket"]

2314

or None))

2315

if not debug:

2316

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

2489

socketfd = None

2490

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

2491

socketfd = server_settings["socket"]

2492

tcp_server = MandosServer(

2493

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

2494

ClientHandler,

2495

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

2496

use_ipv6=use_ipv6,

2497

gnutls_priority=server_settings["priority"],

2498

use_dbus=use_dbus,

2499

socketfd=socketfd)

2500

if not foreground:

2501

pidfilename = "/run/mandos.pid"

2502

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

2503

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

2504

pidfile = None

2317

2505

try:

2318

pidfile = open(pidfilename, "w")

2506

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

2319

2507

except IOError as e:

2320

2508

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

2321

2509

exc_info=e)

2335

2523

os.setuid(uid)

2336

2524

except OSError as error:

2337

2525

if error.errno != errno.EPERM:

2338

raise error

2526

raise

2339

2527

2340

2528

if debug:

2341

2529

# Enable all possible GnuTLS debugging

2348

2536

def debug_gnutls(level, string):

2349

2537

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

2350

2538

2351

(gnutls.library.functions

2352

.gnutls_global_set_log_function(debug_gnutls))

2539

gnutls.library.functions.gnutls_global_set_log_function(

2540

debug_gnutls)

2353

2541

2354

2542

# Redirect stdin so all checkers get /dev/null

2355

2543

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

2358

2546

os.close(null)

2359

2547

2360

2548

# Need to fork before connecting to D-Bus

2361

if not debug:

2549

if not foreground:

2362

2550

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

2363

2551

daemon()

2364

2552

2553

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

2554

# need to inform gobject that threads will be used.

2365

2555

gobject.threads_init()

2366

2556

2367

2557

global main_loop

2373

2563

if use_dbus:

2374

2564

try:

2375

2565

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

2376

bus, do_not_queue=True)

2377

old_bus_name = (dbus.service.BusName

2378

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

2379

do_not_queue=True))

2380

except dbus.exceptions.NameExistsException as e:

2566

bus,

2567

do_not_queue=True)

2568

old_bus_name = dbus.service.BusName(

2569

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

2570

do_not_queue=True)

2571

except dbus.exceptions.DBusException as e:

2381

2572

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

2382

2573

use_dbus = False

2383

2574

server_settings["use_dbus"] = False

2384

2575

tcp_server.use_dbus = False

2385

protocol = avahi.PROTO_INET6 if use_ipv6 else avahi.PROTO_INET

2386

service = AvahiServiceToSyslog(name =

2387

server_settings["servicename"],

2388

servicetype = "_mandos._tcp",

2389

protocol = protocol, bus = bus)

2390

if server_settings["interface"]:

2391

service.interface = (if_nametoindex

2392

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

2576

if zeroconf:

2577

protocol = avahi.PROTO_INET6 if use_ipv6 else avahi.PROTO_INET

2578

service = AvahiServiceToSyslog(

2579

name = server_settings["servicename"],

2580

servicetype = "_mandos._tcp",

2581

protocol = protocol,

2582

bus = bus)

2583

if server_settings["interface"]:

2584

service.interface = if_nametoindex(

2585

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

2393

2586

2394

2587

global multiprocessing_manager

2395

2588

multiprocessing_manager = multiprocessing.Manager()

2402

2595

old_client_settings = {}

2403

2596

clients_data = {}

2404

2597

2598

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

2599

global wnull

2600

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

2601

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

2602

# mode

2603

if debug or not foreground:

2604

wnull.close()

2605

2405

2606

# Get client data and settings from last running state.

2406

2607

if server_settings["restore"]:

2407

2608

try:

2408

2609

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

2409

clients_data, old_client_settings = (pickle.load

2410

(stored_state))

2610

clients_data, old_client_settings = pickle.load(

2611

stored_state)

2411

2612

os.remove(stored_state_path)

2412

2613

except IOError as e:

2413

2614

if e.errno == errno.ENOENT:

2414

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

2415

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

2615

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

2616

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

2416

2617

else:

2417

2618

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

2418

2619

exc_info=e)

2419

2620

raise

2420

2621

except EOFError as e:

2421

2622

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

2422

"EOFError:", exc_info=e)

2623

"EOFError:",

2624

exc_info=e)

2423

2625

2424

2626

with PGPEngine() as pgp:

2425

for client_name, client in clients_data.iteritems():

2627

for client_name, client in clients_data.items():

2628

# Skip removed clients

2629

if client_name not in client_settings:

2630

continue

2631

2426

2632

# Decide which value to use after restoring saved state.

2427

2633

# We have three different values: Old config file,

2428

2634

# new config file, and saved state.

2433

2639

# For each value in new config, check if it

2434

2640

# differs from the old config value (Except for

2435

2641

# the "secret" attribute)

2436

if (name != "secret" and

2437

value != old_client_settings[client_name]

2438

[name]):

2642

if (name != "secret"

2643

and (value !=

2644

old_client_settings[client_name][name])):

2439

2645

client[name] = value

2440

2646

except KeyError:

2441

2647

pass

2449

2655

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

2450

2656

if not client["last_checked_ok"]:

2451

2657

logger.warning(

2452

"disabling client {0} - Client never "

2453

"performed a successful checker"

2454

.format(client_name))

2658

"disabling client {} - Client never "

2659

"performed a successful checker".format(

2660

client_name))

2455

2661

client["enabled"] = False

2456

2662

elif client["last_checker_status"] != 0:

2457

2663

logger.warning(

2458

"disabling client {0} - Client "

2459

"last checker failed with error code {1}"

2460

.format(client_name,

2461

client["last_checker_status"]))

2664

"disabling client {} - Client last"

2665

" checker failed with error code"

2666

" {}".format(

2667

client_name,

2668

client["last_checker_status"]))

2462

2669

client["enabled"] = False

2463

2670

else:

2464

client["expires"] = (datetime.datetime

2465

.utcnow()

2466

+ client["timeout"])

2671

client["expires"] = (

2672

datetime.datetime.utcnow()

2673

+ client["timeout"])

2467

2674

logger.debug("Last checker succeeded,"

2468

" keeping {0} enabled"

2469

.format(client_name))

2675

" keeping {} enabled".format(

2676

client_name))

2470

2677

try:

2471

client["secret"] = (

2472

pgp.decrypt(client["encrypted_secret"],

2473

client_settings[client_name]

2474

["secret"]))

2678

client["secret"] = pgp.decrypt(

2679

client["encrypted_secret"],

2680

client_settings[client_name]["secret"])

2475

2681

except PGPError:

2476

2682

# If decryption fails, we use secret from new settings

2477

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

2478

.format(client_name))

2479

client["secret"] = (

2480

client_settings[client_name]["secret"])

2683

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

2684

client_name))

2685

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

2686

["secret"])

2481

2687

2482

2688

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

2483

2689

for client_name in (set(old_client_settings)

2488

2694

clients_data[client_name] = client_settings[client_name]

2489

2695

2490

2696

# Create all client objects

2491

for client_name, client in clients_data.iteritems():

2697

for client_name, client in clients_data.items():

2492

2698

tcp_server.clients[client_name] = client_class(

2493

name = client_name, settings = client)

2699

name = client_name,

2700

settings = client,

2701

server_settings = server_settings)

2494

2702

2495

2703

if not tcp_server.clients:

2496

2704

logger.warning("No clients defined")

2497

2705

2498

if not debug:

2499

try:

2500

with pidfile:

2501

pid = os.getpid()

2502

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

2503

del pidfile

2504

except IOError:

2505

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

2506

pidfilename, pid)

2507

except NameError:

2508

# "pidfile" was never created

2509

pass

2706

if not foreground:

2707

if pidfile is not None:

2708

pid = os.getpid()

2709

try:

2710

with pidfile:

2711

print(pid, file=pidfile)

2712

except IOError:

2713

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

2714

pidfilename, pid)

2715

del pidfile

2510

2716

del pidfilename

2511

2717

2512

2718

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

2513

2719

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

2514

2720

2515

2721

if use_dbus:

2516

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

2517

"se.bsnet.fukt.Mandos"})

2722

2723

@alternate_dbus_interfaces(

2724

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

2518

2725

class MandosDBusService(DBusObjectWithProperties):

2519

2726

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

2727

2520

2728

def __init__(self):

2521

2729

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

2730

2522

2731

_interface = "se.recompile.Mandos"

2523

2732

2524

2733

@dbus_interface_annotations(_interface)

2525

2734

def _foo(self):

2526

return { "org.freedesktop.DBus.Property"

2527

".EmitsChangedSignal":

2528

"false"}

2735

return {

2736

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

2737

"false" }

2529

2738

2530

2739

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

2531

2740

def ClientAdded(self, objpath):

2545

2754

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

2546

2755

def GetAllClients(self):

2547

2756

"D-Bus method"

2548

return dbus.Array(c.dbus_object_path

2549

for c in

2757

return dbus.Array(c.dbus_object_path for c in

2550

2758

tcp_server.clients.itervalues())

2551

2759

2552

2760

@dbus.service.method(_interface,

2554

2762

def GetAllClientsWithProperties(self):

2555

2763

"D-Bus method"

2556

2764

return dbus.Dictionary(

2557

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

2558

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

2765

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

2766

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

2559

2767

signature="oa{sv}")

2560

2768

2561

2769

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

2578

2786

2579

2787

def cleanup():

2580

2788

"Cleanup function; run on exit"

2581

service.cleanup()

2789

if zeroconf:

2790

service.cleanup()

2582

2791

2583

2792

multiprocessing.active_children()

2793

wnull.close()

2584

2794

if not (tcp_server.clients or client_settings):

2585

2795

return

2586

2796

2597

2807

2598

2808

# A list of attributes that can not be pickled

2599

2809

# + secret.

2600

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

2601

"checker"))

2602

for name, typ in (inspect.getmembers

2603

(dbus.service.Object)):

2810

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

2811

"checker", "server_settings" }

2812

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

2813

.Object):

2604

2814

exclude.add(name)

2605

2815

2606

2816

client_dict["encrypted_secret"] = (client

2613

2823

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

2614

2824

2615

2825

try:

2616

with (tempfile.NamedTemporaryFile

2617

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

2618

dir=os.path.dirname(stored_state_path),

2619

delete=False)) as stored_state:

2826

with tempfile.NamedTemporaryFile(

2827

mode='wb',

2828

suffix=".pickle",

2829

prefix='clients-',

2830

dir=os.path.dirname(stored_state_path),

2831

delete=False) as stored_state:

2620

2832

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

2621

tempname=stored_state.name

2833

tempname = stored_state.name

2622

2834

os.rename(tempname, stored_state_path)

2623

2835

except (IOError, OSError) as e:

2624

2836

if not debug:

2627

2839

except NameError:

2628

2840

pass

2629

2841

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

2630

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

2842

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

2631

2843

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

2632

2844

else:

2633

2845

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

2634

2846

exc_info=e)

2635

raise e

2847

raise

2636

2848

2637

2849

# Delete all clients, and settings from config

2638

2850

while tcp_server.clients:

2643

2855

client.disable(quiet=True)

2644

2856

if use_dbus:

2645

2857

# Emit D-Bus signal

2646

mandos_dbus_service.ClientRemoved(client

2647

.dbus_object_path,

2648

client.name)

2858

mandos_dbus_service.ClientRemoved(

2859

client.dbus_object_path, client.name)

2649

2860

client_settings.clear()

2650

2861

2651

2862

atexit.register(cleanup)

2662

2873

tcp_server.server_activate()

2663

2874

2664

2875

# Find out what port we got

2665

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

2876

if zeroconf:

2877

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

2666

2878

if use_ipv6:

2667

2879

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

2668

2880

" flowinfo %d, scope_id %d",

2674

2886

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

2675

2887

2676

2888

try:

2677

# From the Avahi example code

2678

try:

2679

service.activate()

2680

except dbus.exceptions.DBusException as error:

2681

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

2682

cleanup()

2683

sys.exit(1)

2684

# End of Avahi example code

2889

if zeroconf:

2890

# From the Avahi example code

2891

try:

2892

service.activate()

2893

except dbus.exceptions.DBusException as error:

2894

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

2895

cleanup()

2896

sys.exit(1)

2897

# End of Avahi example code

2685

2898

2686

2899

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

2687

2900

lambda *args, **kwargs:

2702

2915

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

2703

2916

cleanup()

2704

2917

2918

2705

2919

if __name__ == '__main__':

2706

2920

main()