/mandos/release : revision 237.25.1

1

#!/usr/bin/python

1

#!/usr/bin/python2.7

2

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

3

#

3

#

4

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

5

#

5

#

6

# This program is partly derived from an example program for an Avahi

7

# service publisher, downloaded from

8

# <http://avahi.org/wiki/PythonPublishExample>. This includes the

9

# methods "add", "remove", "server_state_changed",

10

# "entry_group_state_changed", "cleanup", and "activate" in the

11

# "AvahiService" class, and some lines in "main".

12

#

12

#

13

# Everything else is

14

15

16

#

17

# This file is part of Mandos.

18

#

19

# Mandos is free software: you can redistribute it and/or modify it

20

# under the terms of the GNU General Public License as published by

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

21

19

# the Free Software Foundation, either version 3 of the License, or

22

20

# (at your option) any later version.

23

21

#

24

# Mandos is distributed in the hope that it will be useful, but

25

# WITHOUT ANY WARRANTY; without even the implied warranty of

22

# This program is distributed in the hope that it will be useful,

23

# but WITHOUT ANY WARRANTY; without even the implied warranty of

26

24

# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the

27

25

# GNU General Public License for more details.

28

#

26

#

29

27

# You should have received a copy of the GNU General Public License

30

# along with Mandos. If not, see <http://www.gnu.org/licenses/>.

31

#

28

# along with this program. If not, see

29

# <http://www.gnu.org/licenses/>.

30

#

32

31

# Contact the authors at <mandos@recompile.se>.

33

#

32

#

34

33

35

34

from __future__ import (division, absolute_import, print_function,

36

35

unicode_literals)

37

36

38

try:

39

from future_builtins import *

40

except ImportError:

41

pass

37

from future_builtins import *

42

38

43

try:

44

import SocketServer as socketserver

45

except ImportError:

46

import socketserver

39

import SocketServer as socketserver

47

40

import socket

48

41

import argparse

49

42

import datetime

50

43

import errno

51

try:

52

import ConfigParser as configparser

53

except ImportError:

54

import configparser

44

import gnutls.crypto

45

import gnutls.connection

46

import gnutls.errors

47

import gnutls.library.functions

48

import gnutls.library.constants

49

import gnutls.library.types

50

import ConfigParser as configparser

55

51

import sys

56

52

import re

57

53

import os

66

62

import struct

67

63

import fcntl

68

64

import functools

69

try:

70

import cPickle as pickle

71

except ImportError:

72

import pickle

65

import cPickle as pickle

73

66

import multiprocessing

74

67

import types

75

68

import binascii

76

69

import tempfile

77

70

import itertools

78

71

import collections

79

import codecs

80

72

81

73

import dbus

82

74

import dbus.service

83

import gi

84

from gi.repository import GLib

75

import gobject

76

import avahi

85

77

from dbus.mainloop.glib import DBusGMainLoop

86

78

import ctypes

87

79

import ctypes.util

88

80

import xml.dom.minidom

89

81

import inspect

90

82

91

# Try to find the value of SO_BINDTODEVICE:

92

83

try:

93

# This is where SO_BINDTODEVICE is in Python 3.3 (or 3.4?) and

94

# newer, and it is also the most natural place for it:

95

84

SO_BINDTODEVICE = socket.SO_BINDTODEVICE

96

85

except AttributeError:

97

86

try:

98

# This is where SO_BINDTODEVICE was up to and including Python

99

# 2.6, and also 3.2:

100

87

from IN import SO_BINDTODEVICE

101

88

except ImportError:

102

# In Python 2.7 it seems to have been removed entirely.

103

# Try running the C preprocessor:

104

try:

105

cc = subprocess.Popen(["cc", "--language=c", "-E",

106

"/dev/stdin"],

107

stdin=subprocess.PIPE,

108

stdout=subprocess.PIPE)

109

stdout = cc.communicate(

110

"#include <sys/socket.h>\nSO_BINDTODEVICE\n")[0]

111

SO_BINDTODEVICE = int(stdout.splitlines()[-1])

112

except (OSError, ValueError, IndexError):

113

# No value found

114

SO_BINDTODEVICE = None

89

SO_BINDTODEVICE = None

115

90

116

91

if sys.version_info.major == 2:

117

92

str = unicode

118

93

119

if sys.version_info < (3, 2):

120

configparser.Configparser = configparser.SafeConfigParser

121

122

version = "1.8.7"

94

version = "1.6.9"

123

95

stored_state_file = "clients.pickle"

124

96

125

97

logger = logging.getLogger()

126

98

syslogger = None

127

99

128

100

try:

129

if_nametoindex = ctypes.cdll.LoadLibrary(

130

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

101

if_nametoindex = (ctypes.cdll.LoadLibrary

102

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

103

.if_nametoindex)

131

104

except (OSError, AttributeError):

132

133

105

def if_nametoindex(interface):

134

106

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

135

107

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

140

112

return interface_index

141

113

142

114

143

def copy_function(func):

144

"""Make a copy of a function"""

145

if sys.version_info.major == 2:

146

return types.FunctionType(func.func_code,

147

func.func_globals,

148

func.func_name,

149

func.func_defaults,

150

func.func_closure)

151

else:

152

return types.FunctionType(func.__code__,

153

func.__globals__,

154

func.__name__,

155

func.__defaults__,

156

func.__closure__)

157

158

159

115

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

160

116

"""init logger and add loglevel"""

161

117

162

118

global syslogger

163

syslogger = (logging.handlers.SysLogHandler(

164

facility=logging.handlers.SysLogHandler.LOG_DAEMON,

165

address="/dev/log"))

119

syslogger = (logging.handlers.SysLogHandler

120

(facility =

121

logging.handlers.SysLogHandler.LOG_DAEMON,

122

address = "/dev/log"))

166

123

syslogger.setFormatter(logging.Formatter

167

124

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

168

125

' %(message)s'))

169

126

logger.addHandler(syslogger)

170

127

171

128

if debug:

172

129

console = logging.StreamHandler()

173

130

console.setFormatter(logging.Formatter('%(asctime)s %(name)s'

185

142

186

143

class PGPEngine(object):

187

144

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

188

189

145

def __init__(self):

190

146

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

191

self.gpg = "gpg"

192

try:

193

output = subprocess.check_output(["gpgconf"])

194

for line in output.splitlines():

195

name, text, path = line.split(b":")

196

if name == "gpg":

197

self.gpg = path

198

break

199

except OSError as e:

200

if e.errno != errno.ENOENT:

201

raise

202

147

self.gnupgargs = ['--batch',

203

'--homedir', self.tempdir,

148

'--home', self.tempdir,

204

149

'--force-mdc',

205

'--quiet']

206

# Only GPG version 1 has the --no-use-agent option.

207

if self.gpg == "gpg" or self.gpg.endswith("/gpg"):

208

self.gnupgargs.append("--no-use-agent")

209

150

'--quiet',

151

'--no-use-agent']

152

210

153

def __enter__(self):

211

154

return self

212

155

213

156

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

214

157

self._cleanup()

215

158

return False

216

159

217

160

def __del__(self):

218

161

self._cleanup()

219

162

220

163

def _cleanup(self):

221

164

if self.tempdir is not None:

222

165

# Delete contents of tempdir

223

166

for root, dirs, files in os.walk(self.tempdir,

224

topdown=False):

167

topdown = False):

225

168

for filename in files:

226

169

os.remove(os.path.join(root, filename))

227

170

for dirname in dirs:

229

172

# Remove tempdir

230

173

os.rmdir(self.tempdir)

231

174

self.tempdir = None

232

175

233

176

def password_encode(self, password):

234

177

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

235

178

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

240

183

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

241

184

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

242

185

return encoded

243

186

244

187

def encrypt(self, data, password):

245

188

passphrase = self.password_encode(password)

246

with tempfile.NamedTemporaryFile(

247

dir=self.tempdir) as passfile:

189

with tempfile.NamedTemporaryFile(dir=self.tempdir

190

) as passfile:

248

191

passfile.write(passphrase)

249

192

passfile.flush()

250

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

193

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

251

194

'--passphrase-file',

252

195

passfile.name]

253

196

+ self.gnupgargs,

254

stdin=subprocess.PIPE,

255

stdout=subprocess.PIPE,

256

stderr=subprocess.PIPE)

257

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

197

stdin = subprocess.PIPE,

198

stdout = subprocess.PIPE,

199

stderr = subprocess.PIPE)

200

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

258

201

if proc.returncode != 0:

259

202

raise PGPError(err)

260

203

return ciphertext

261

204

262

205

def decrypt(self, data, password):

263

206

passphrase = self.password_encode(password)

264

with tempfile.NamedTemporaryFile(

265

dir=self.tempdir) as passfile:

207

with tempfile.NamedTemporaryFile(dir = self.tempdir

208

) as passfile:

266

209

passfile.write(passphrase)

267

210

passfile.flush()

268

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

211

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

269

212

'--passphrase-file',

270

213

passfile.name]

271

214

+ self.gnupgargs,

272

stdin=subprocess.PIPE,

273

stdout=subprocess.PIPE,

274

stderr=subprocess.PIPE)

275

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

215

stdin = subprocess.PIPE,

216

stdout = subprocess.PIPE,

217

stderr = subprocess.PIPE)

218

decrypted_plaintext, err = proc.communicate(input

219

= data)

276

220

if proc.returncode != 0:

277

221

raise PGPError(err)

278

222

return decrypted_plaintext

279

223

280

224

281

# Pretend that we have an Avahi module

282

class avahi(object):

283

"""This isn't so much a class as it is a module-like namespace."""

284

IF_UNSPEC = -1 # avahi-common/address.h

285

PROTO_UNSPEC = -1 # avahi-common/address.h

286

PROTO_INET = 0 # avahi-common/address.h

287

PROTO_INET6 = 1 # avahi-common/address.h

288

DBUS_NAME = "org.freedesktop.Avahi"

289

DBUS_INTERFACE_ENTRY_GROUP = DBUS_NAME + ".EntryGroup"

290

DBUS_INTERFACE_SERVER = DBUS_NAME + ".Server"

291

DBUS_PATH_SERVER = "/"

292

293

@staticmethod

294

def string_array_to_txt_array(t):

295

return dbus.Array((dbus.ByteArray(s.encode("utf-8"))

296

for s in t), signature="ay")

297

ENTRY_GROUP_ESTABLISHED = 2 # avahi-common/defs.h

298

ENTRY_GROUP_COLLISION = 3 # avahi-common/defs.h

299

ENTRY_GROUP_FAILURE = 4 # avahi-common/defs.h

300

SERVER_INVALID = 0 # avahi-common/defs.h

301

SERVER_REGISTERING = 1 # avahi-common/defs.h

302

SERVER_RUNNING = 2 # avahi-common/defs.h

303

SERVER_COLLISION = 3 # avahi-common/defs.h

304

SERVER_FAILURE = 4 # avahi-common/defs.h

305

306

307

225

class AvahiError(Exception):

308

226

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

309

227

self.value = value

310

228

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

311

229

**kwargs)

312

230

313

314

231

class AvahiServiceError(AvahiError):

315

232

pass

316

233

317

318

234

class AvahiGroupError(AvahiError):

319

235

pass

320

236

321

237

322

238

class AvahiService(object):

323

239

"""An Avahi (Zeroconf) service.

324

240

325

241

Attributes:

326

242

interface: integer; avahi.IF_UNSPEC or an interface index.

327

243

Used to optionally bind to the specified interface.

339

255

server: D-Bus Server

340

256

bus: dbus.SystemBus()

341

257

"""

342

343

def __init__(self,

344

interface=avahi.IF_UNSPEC,

345

name=None,

346

servicetype=None,

347

port=None,

348

TXT=None,

349

domain="",

350

host="",

351

max_renames=32768,

352

protocol=avahi.PROTO_UNSPEC,

353

bus=None):

258

259

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

260

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

261

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

262

protocol = avahi.PROTO_UNSPEC, bus = None):

354

263

self.interface = interface

355

264

self.name = name

356

265

self.type = servicetype

365

274

self.server = None

366

275

self.bus = bus

367

276

self.entry_group_state_changed_match = None

368

277

369

278

def rename(self, remove=True):

370

279

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

371

280

if self.rename_count >= self.max_renames:

373

282

" after %i retries, exiting.",

374

283

self.rename_count)

375

284

raise AvahiServiceError("Too many renames")

376

self.name = str(

377

self.server.GetAlternativeServiceName(self.name))

285

self.name = str(self.server

286

.GetAlternativeServiceName(self.name))

378

287

self.rename_count += 1

379

288

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

380

289

self.name)

391

300

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

392

301

self.cleanup()

393

302

os._exit(1)

394

303

395

304

def remove(self):

396

305

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

397

306

if self.entry_group_state_changed_match is not None:

399

308

self.entry_group_state_changed_match = None

400

309

if self.group is not None:

401

310

self.group.Reset()

402

311

403

312

def add(self):

404

313

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

405

314

self.remove()

422

331

dbus.UInt16(self.port),

423

332

avahi.string_array_to_txt_array(self.TXT))

424

333

self.group.Commit()

425

334

426

335

def entry_group_state_changed(self, state, error):

427

336

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

428

337

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

429

338

430

339

if state == avahi.ENTRY_GROUP_ESTABLISHED:

431

340

logger.debug("Zeroconf service established.")

432

341

elif state == avahi.ENTRY_GROUP_COLLISION:

435

344

elif state == avahi.ENTRY_GROUP_FAILURE:

436

345

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

437

346

str(error))

438

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

439

347

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

348

.format(error))

349

440

350

def cleanup(self):

441

351

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

442

352

if self.group is not None:

447

357

pass

448

358

self.group = None

449

359

self.remove()

450

360

451

361

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

452

362

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

453

363

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

454

bad_states = {

455

avahi.SERVER_INVALID: "Zeroconf server invalid",

456

avahi.SERVER_REGISTERING: None,

457

avahi.SERVER_COLLISION: "Zeroconf server name collision",

458

avahi.SERVER_FAILURE: "Zeroconf server failure",

459

}

364

bad_states = { avahi.SERVER_INVALID:

365

"Zeroconf server invalid",

366

avahi.SERVER_REGISTERING: None,

367

avahi.SERVER_COLLISION:

368

"Zeroconf server name collision",

369

avahi.SERVER_FAILURE:

370

"Zeroconf server failure" }

460

371

if state in bad_states:

461

372

if bad_states[state] is not None:

462

373

if error is None:

465

376

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

466

377

self.cleanup()

467

378

elif state == avahi.SERVER_RUNNING:

468

try:

469

self.add()

470

except dbus.exceptions.DBusException as error:

471

if (error.get_dbus_name()

472

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

473

logger.info("Local Zeroconf service name"

474

" collision.")

475

return self.rename(remove=False)

476

else:

477

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

478

self.cleanup()

479

os._exit(1)

379

self.add()

480

380

else:

481

381

if error is None:

482

382

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

483

383

else:

484

384

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

485

385

486

386

def activate(self):

487

387

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

488

388

if self.server is None:

492

392

follow_name_owner_changes=True),

493

393

avahi.DBUS_INTERFACE_SERVER)

494

394

self.server.connect_to_signal("StateChanged",

495

self.server_state_changed)

395

self.server_state_changed)

496

396

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

497

397

498

398

499

399

class AvahiServiceToSyslog(AvahiService):

500

400

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

501

401

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

502

ret = super(AvahiServiceToSyslog, self).rename(*args, **kwargs)

503

syslogger.setFormatter(logging.Formatter(

504

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

505

.format(self.name)))

402

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

403

syslogger.setFormatter(logging.Formatter

404

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

405

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

406

.format(self.name)))

506

407

return ret

507

408

508

409

509

# Pretend that we have a GnuTLS module

510

class gnutls(object):

511

"""This isn't so much a class as it is a module-like namespace."""

512

513

library = ctypes.util.find_library("gnutls")

514

if library is None:

515

library = ctypes.util.find_library("gnutls-deb0")

516

_library = ctypes.cdll.LoadLibrary(library)

517

del library

518

519

# Unless otherwise indicated, the constants and types below are

520

# all from the gnutls/gnutls.h C header file.

521

522

# Constants

523

E_SUCCESS = 0

524

E_INTERRUPTED = -52

525

E_AGAIN = -28

526

CRT_OPENPGP = 2

527

CRT_RAWPK = 3

528

CLIENT = 2

529

SHUT_RDWR = 0

530

CRD_CERTIFICATE = 1

531

E_NO_CERTIFICATE_FOUND = -49

532

X509_FMT_DER = 0

533

NO_TICKETS = 1<<10

534

ENABLE_RAWPK = 1<<18

535

CTYPE_PEERS = 3

536

KEYID_USE_SHA256 = 1 # gnutls/x509.h

537

OPENPGP_FMT_RAW = 0 # gnutls/openpgp.h

538

539

# Types

540

class session_int(ctypes.Structure):

541

_fields_ = []

542

session_t = ctypes.POINTER(session_int)

543

544

class certificate_credentials_st(ctypes.Structure):

545

_fields_ = []

546

certificate_credentials_t = ctypes.POINTER(

547

certificate_credentials_st)

548

certificate_type_t = ctypes.c_int

549

550

class datum_t(ctypes.Structure):

551

_fields_ = [('data', ctypes.POINTER(ctypes.c_ubyte)),

552

('size', ctypes.c_uint)]

553

554

class openpgp_crt_int(ctypes.Structure):

555

_fields_ = []

556

openpgp_crt_t = ctypes.POINTER(openpgp_crt_int)

557

openpgp_crt_fmt_t = ctypes.c_int # gnutls/openpgp.h

558

log_func = ctypes.CFUNCTYPE(None, ctypes.c_int, ctypes.c_char_p)

559

credentials_type_t = ctypes.c_int

560

transport_ptr_t = ctypes.c_void_p

561

close_request_t = ctypes.c_int

562

563

# Exceptions

564

class Error(Exception):

565

def __init__(self, message=None, code=None, args=()):

566

# Default usage is by a message string, but if a return

567

# code is passed, convert it to a string with

568

# gnutls.strerror()

569

self.code = code

570

if message is None and code is not None:

571

message = gnutls.strerror(code)

572

return super(gnutls.Error, self).__init__(

573

message, *args)

574

575

class CertificateSecurityError(Error):

576

pass

577

578

# Classes

579

class Credentials(object):

580

def __init__(self):

581

self._c_object = gnutls.certificate_credentials_t()

582

gnutls.certificate_allocate_credentials(

583

ctypes.byref(self._c_object))

584

self.type = gnutls.CRD_CERTIFICATE

585

586

def __del__(self):

587

gnutls.certificate_free_credentials(self._c_object)

588

589

class ClientSession(object):

590

def __init__(self, socket, credentials=None):

591

self._c_object = gnutls.session_t()

592

gnutls_flags = gnutls.CLIENT

593

if gnutls.check_version(b"3.5.6"):

594

gnutls_flags |= gnutls.NO_TICKETS

595

if gnutls.has_rawpk:

596

gnutls_flags |= gnutls.ENABLE_RAWPK

597

gnutls.init(ctypes.byref(self._c_object), gnutls_flags)

598

del gnutls_flags

599

gnutls.set_default_priority(self._c_object)

600

gnutls.transport_set_ptr(self._c_object, socket.fileno())

601

gnutls.handshake_set_private_extensions(self._c_object,

602

True)

603

self.socket = socket

604

if credentials is None:

605

credentials = gnutls.Credentials()

606

gnutls.credentials_set(self._c_object, credentials.type,

607

ctypes.cast(credentials._c_object,

608

ctypes.c_void_p))

609

self.credentials = credentials

610

611

def __del__(self):

612

gnutls.deinit(self._c_object)

613

614

def handshake(self):

615

return gnutls.handshake(self._c_object)

616

617

def send(self, data):

618

data = bytes(data)

619

data_len = len(data)

620

while data_len > 0:

621

data_len -= gnutls.record_send(self._c_object,

622

data[-data_len:],

623

data_len)

624

625

def bye(self):

626

return gnutls.bye(self._c_object, gnutls.SHUT_RDWR)

627

628

# Error handling functions

629

def _error_code(result):

630

"""A function to raise exceptions on errors, suitable

631

for the 'restype' attribute on ctypes functions"""

632

if result >= 0:

633

return result

634

if result == gnutls.E_NO_CERTIFICATE_FOUND:

635

raise gnutls.CertificateSecurityError(code=result)

636

raise gnutls.Error(code=result)

637

638

def _retry_on_error(result, func, arguments):

639

"""A function to retry on some errors, suitable

640

for the 'errcheck' attribute on ctypes functions"""

641

while result < 0:

642

if result not in (gnutls.E_INTERRUPTED, gnutls.E_AGAIN):

643

return _error_code(result)

644

result = func(*arguments)

645

return result

646

647

# Unless otherwise indicated, the function declarations below are

648

# all from the gnutls/gnutls.h C header file.

649

650

# Functions

651

priority_set_direct = _library.gnutls_priority_set_direct

652

priority_set_direct.argtypes = [session_t, ctypes.c_char_p,

653

ctypes.POINTER(ctypes.c_char_p)]

654

priority_set_direct.restype = _error_code

655

656

init = _library.gnutls_init

657

init.argtypes = [ctypes.POINTER(session_t), ctypes.c_int]

658

init.restype = _error_code

659

660

set_default_priority = _library.gnutls_set_default_priority

661

set_default_priority.argtypes = [session_t]

662

set_default_priority.restype = _error_code

663

664

record_send = _library.gnutls_record_send

665

record_send.argtypes = [session_t, ctypes.c_void_p,

666

ctypes.c_size_t]

667

record_send.restype = ctypes.c_ssize_t

668

record_send.errcheck = _retry_on_error

669

670

certificate_allocate_credentials = (

671

_library.gnutls_certificate_allocate_credentials)

672

certificate_allocate_credentials.argtypes = [

673

ctypes.POINTER(certificate_credentials_t)]

674

certificate_allocate_credentials.restype = _error_code

675

676

certificate_free_credentials = (

677

_library.gnutls_certificate_free_credentials)

678

certificate_free_credentials.argtypes = [

679

certificate_credentials_t]

680

certificate_free_credentials.restype = None

681

682

handshake_set_private_extensions = (

683

_library.gnutls_handshake_set_private_extensions)

684

handshake_set_private_extensions.argtypes = [session_t,

685

ctypes.c_int]

686

handshake_set_private_extensions.restype = None

687

688

credentials_set = _library.gnutls_credentials_set

689

credentials_set.argtypes = [session_t, credentials_type_t,

690

ctypes.c_void_p]

691

credentials_set.restype = _error_code

692

693

strerror = _library.gnutls_strerror

694

strerror.argtypes = [ctypes.c_int]

695

strerror.restype = ctypes.c_char_p

696

697

certificate_type_get = _library.gnutls_certificate_type_get

698

certificate_type_get.argtypes = [session_t]

699

certificate_type_get.restype = _error_code

700

701

certificate_get_peers = _library.gnutls_certificate_get_peers

702

certificate_get_peers.argtypes = [session_t,

703

ctypes.POINTER(ctypes.c_uint)]

704

certificate_get_peers.restype = ctypes.POINTER(datum_t)

705

706

global_set_log_level = _library.gnutls_global_set_log_level

707

global_set_log_level.argtypes = [ctypes.c_int]

708

global_set_log_level.restype = None

709

710

global_set_log_function = _library.gnutls_global_set_log_function

711

global_set_log_function.argtypes = [log_func]

712

global_set_log_function.restype = None

713

714

deinit = _library.gnutls_deinit

715

deinit.argtypes = [session_t]

716

deinit.restype = None

717

718

handshake = _library.gnutls_handshake

719

handshake.argtypes = [session_t]

720

handshake.restype = _error_code

721

handshake.errcheck = _retry_on_error

722

723

transport_set_ptr = _library.gnutls_transport_set_ptr

724

transport_set_ptr.argtypes = [session_t, transport_ptr_t]

725

transport_set_ptr.restype = None

726

727

bye = _library.gnutls_bye

728

bye.argtypes = [session_t, close_request_t]

729

bye.restype = _error_code

730

bye.errcheck = _retry_on_error

731

732

check_version = _library.gnutls_check_version

733

check_version.argtypes = [ctypes.c_char_p]

734

check_version.restype = ctypes.c_char_p

735

736

_need_version = b"3.3.0"

737

if check_version(_need_version) is None:

738

raise self.Error("Needs GnuTLS {} or later"

739

.format(_need_version))

740

741

_tls_rawpk_version = b"3.6.6"

742

has_rawpk = bool(check_version(_tls_rawpk_version))

743

744

if has_rawpk:

745

# Types

746

class pubkey_st(ctypes.Structure):

747

_fields = []

748

pubkey_t = ctypes.POINTER(pubkey_st)

749

750

x509_crt_fmt_t = ctypes.c_int

751

752

# All the function declarations below are from gnutls/abstract.h

753

pubkey_init = _library.gnutls_pubkey_init

754

pubkey_init.argtypes = [ctypes.POINTER(pubkey_t)]

755

pubkey_init.restype = _error_code

756

757

pubkey_import = _library.gnutls_pubkey_import

758

pubkey_import.argtypes = [pubkey_t, ctypes.POINTER(datum_t),

759

x509_crt_fmt_t]

760

pubkey_import.restype = _error_code

761

762

pubkey_get_key_id = _library.gnutls_pubkey_get_key_id

763

pubkey_get_key_id.argtypes = [pubkey_t, ctypes.c_int,

764

ctypes.POINTER(ctypes.c_ubyte),

765

ctypes.POINTER(ctypes.c_size_t)]

766

pubkey_get_key_id.restype = _error_code

767

768

pubkey_deinit = _library.gnutls_pubkey_deinit

769

pubkey_deinit.argtypes = [pubkey_t]

770

pubkey_deinit.restype = None

771

else:

772

# All the function declarations below are from gnutls/openpgp.h

773

774

openpgp_crt_init = _library.gnutls_openpgp_crt_init

775

openpgp_crt_init.argtypes = [ctypes.POINTER(openpgp_crt_t)]

776

openpgp_crt_init.restype = _error_code

777

778

openpgp_crt_import = _library.gnutls_openpgp_crt_import

779

openpgp_crt_import.argtypes = [openpgp_crt_t,

780

ctypes.POINTER(datum_t),

781

openpgp_crt_fmt_t]

782

openpgp_crt_import.restype = _error_code

783

784

openpgp_crt_verify_self = _library.gnutls_openpgp_crt_verify_self

785

openpgp_crt_verify_self.argtypes = [openpgp_crt_t, ctypes.c_uint,

786

ctypes.POINTER(ctypes.c_uint)]

787

openpgp_crt_verify_self.restype = _error_code

788

789

openpgp_crt_deinit = _library.gnutls_openpgp_crt_deinit

790

openpgp_crt_deinit.argtypes = [openpgp_crt_t]

791

openpgp_crt_deinit.restype = None

792

793

openpgp_crt_get_fingerprint = (

794

_library.gnutls_openpgp_crt_get_fingerprint)

795

openpgp_crt_get_fingerprint.argtypes = [openpgp_crt_t,

796

ctypes.c_void_p,

797

ctypes.POINTER(

798

ctypes.c_size_t)]

799

openpgp_crt_get_fingerprint.restype = _error_code

800

801

if check_version(b"3.6.4"):

802

certificate_type_get2 = _library.gnutls_certificate_type_get2

803

certificate_type_get2.argtypes = [session_t, ctypes.c_int]

804

certificate_type_get2.restype = _error_code

805

806

# Remove non-public functions

807

del _error_code, _retry_on_error

808

809

810

def call_pipe(connection, # : multiprocessing.Connection

811

func, *args, **kwargs):

812

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

813

814

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

815

return value on the provided multiprocessing.Connection.

816

"""

817

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

818

connection.close()

819

820

821

410

class Client(object):

822

411

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

823

412

824

413

Attributes:

825

414

approved: bool(); 'None' if not yet approved/disapproved

826

415

approval_delay: datetime.timedelta(); Time to wait for approval

827

416

approval_duration: datetime.timedelta(); Duration of one approval

828

checker: multiprocessing.Process(); a running checker process used

829

to see if the client lives. 'None' if no process is

830

running.

831

checker_callback_tag: a GLib event source tag, or None

417

checker: subprocess.Popen(); a running checker process used

418

to see if the client lives.

419

'None' if no process is running.

420

checker_callback_tag: a gobject event source tag, or None

832

421

checker_command: string; External command which is run to check

833

422

if client lives. %() expansions are done at

834

423

runtime with vars(self) as dict, so that for

835

424

instance %(name)s can be used in the command.

836

checker_initiator_tag: a GLib event source tag, or None

425

checker_initiator_tag: a gobject event source tag, or None

837

426

created: datetime.datetime(); (UTC) object creation

838

427

client_structure: Object describing what attributes a client has

839

428

and is used for storing the client at exit

840

429

current_checker_command: string; current running checker_command

841

disable_initiator_tag: a GLib event source tag, or None

430

disable_initiator_tag: a gobject event source tag, or None

842

431

enabled: bool()

843

432

fingerprint: string (40 or 32 hexadecimal digits); used to

844

uniquely identify an OpenPGP client

845

key_id: string (64 hexadecimal digits); used to uniquely identify

846

a client using raw public keys

433

uniquely identify the client

847

434

host: string; available for use by the checker command

848

435

interval: datetime.timedelta(); How often to start a new checker

849

436

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

851

438

last_checker_status: integer between 0 and 255 reflecting exit

852

439

status of last checker. -1 reflects crashed

853

440

checker, -2 means no checker completed yet.

854

last_checker_signal: The signal which killed the last checker, if

855

last_checker_status is -1

856

441

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

857

442

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

858

443

D-Bus identifiers

865

450

disabled, or None

866

451

server_settings: The server_settings dict from main()

867

452

"""

868

453

869

454

runtime_expansions = ("approval_delay", "approval_duration",

870

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

455

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

871

456

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

872

457

"last_approval_request", "last_checked_ok",

873

458

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

874

client_defaults = {

875

"timeout": "PT5M",

876

"extended_timeout": "PT15M",

877

"interval": "PT2M",

878

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

879

"host": "",

880

"approval_delay": "PT0S",

881

"approval_duration": "PT1S",

882

"approved_by_default": "True",

883

"enabled": "True",

884

}

885

459

client_defaults = { "timeout": "PT5M",

460

"extended_timeout": "PT15M",

461

"interval": "PT2M",

462

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

463

"host": "",

464

"approval_delay": "PT0S",

465

"approval_duration": "PT1S",

466

"approved_by_default": "True",

467

"enabled": "True",

468

}

469

886

470

@staticmethod

887

471

def config_parser(config):

888

472

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

895

479

for client_name in config.sections():

896

480

section = dict(config.items(client_name))

897

481

client = settings[client_name] = {}

898

482

899

483

client["host"] = section["host"]

900

484

# Reformat values from string types to Python types

901

485

client["approved_by_default"] = config.getboolean(

902

486

client_name, "approved_by_default")

903

487

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

904

488

"enabled")

905

906

# Uppercase and remove spaces from key_id and fingerprint

907

# for later comparison purposes with return value from the

908

# key_id() and fingerprint() functions

909

client["key_id"] = (section.get("key_id", "").upper()

910

.replace(" ", ""))

489

911

490

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

912

491

.replace(" ", ""))

913

492

if "secret" in section:

914

client["secret"] = codecs.decode(section["secret"]

915

.encode("utf-8"),

916

"base64")

493

client["secret"] = section["secret"].decode("base64")

917

494

elif "secfile" in section:

918

495

with open(os.path.expanduser(os.path.expandvars

919

496

(section["secfile"])),

934

511

client["last_approval_request"] = None

935

512

client["last_checked_ok"] = None

936

513

client["last_checker_status"] = -2

937

514

938

515

return settings

939

940

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

516

517

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

941

518

self.name = name

942

519

if server_settings is None:

943

520

server_settings = {}

945

522

# adding all client settings

946

523

for setting, value in settings.items():

947

524

setattr(self, setting, value)

948

525

949

526

if self.enabled:

950

527

if not hasattr(self, "last_enabled"):

951

528

self.last_enabled = datetime.datetime.utcnow()

955

532

else:

956

533

self.last_enabled = None

957

534

self.expires = None

958

535

959

536

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

960

logger.debug(" Key ID: %s", self.key_id)

537

# Uppercase and remove spaces from fingerprint for later

538

# comparison purposes with return value from the fingerprint()

539

# function

961

540

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

962

541

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

963

542

datetime.datetime.utcnow())

964

543

965

544

# attributes specific for this server instance

966

545

self.checker = None

967

546

self.checker_initiator_tag = None

970

549

self.current_checker_command = None

971

550

self.approved = None

972

551

self.approvals_pending = 0

973

self.changedstate = multiprocessing_manager.Condition(

974

multiprocessing_manager.Lock())

975

self.client_structure = [attr

976

for attr in self.__dict__.keys()

552

self.changedstate = (multiprocessing_manager

553

.Condition(multiprocessing_manager

554

.Lock()))

555

self.client_structure = [attr for attr in

556

self.__dict__.iterkeys()

977

557

if not attr.startswith("_")]

978

558

self.client_structure.append("client_structure")

979

980

for name, t in inspect.getmembers(

981

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

559

560

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

561

lambda obj:

562

isinstance(obj,

563

property)):

982

564

if not name.startswith("_"):

983

565

self.client_structure.append(name)

984

566

985

567

# Send notice to process children that client state has changed

986

568

def send_changedstate(self):

987

569

with self.changedstate:

988

570

self.changedstate.notify_all()

989

571

990

572

def enable(self):

991

573

"""Start this client's checker and timeout hooks"""

992

574

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

997

579

self.last_enabled = datetime.datetime.utcnow()

998

580

self.init_checker()

999

581

self.send_changedstate()

1000

582

1001

583

def disable(self, quiet=True):

1002

584

"""Disable this client."""

1003

585

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

1005

587

if not quiet:

1006

588

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

1007

589

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

1008

GLib.source_remove(self.disable_initiator_tag)

590

gobject.source_remove(self.disable_initiator_tag)

1009

591

self.disable_initiator_tag = None

1010

592

self.expires = None

1011

593

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

1012

GLib.source_remove(self.checker_initiator_tag)

594

gobject.source_remove(self.checker_initiator_tag)

1013

595

self.checker_initiator_tag = None

1014

596

self.stop_checker()

1015

597

self.enabled = False

1016

598

if not quiet:

1017

599

self.send_changedstate()

1018

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

600

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

1019

601

return False

1020

602

1021

603

def __del__(self):

1022

604

self.disable()

1023

605

1024

606

def init_checker(self):

1025

607

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

1026

608

# and every interval from then on.

1027

609

if self.checker_initiator_tag is not None:

1028

GLib.source_remove(self.checker_initiator_tag)

1029

self.checker_initiator_tag = GLib.timeout_add(

1030

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

1031

self.start_checker)

610

gobject.source_remove(self.checker_initiator_tag)

611

self.checker_initiator_tag = (gobject.timeout_add

612

(int(self.interval

613

.total_seconds() * 1000),

614

self.start_checker))

1032

615

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

1033

616

if self.disable_initiator_tag is not None:

1034

GLib.source_remove(self.disable_initiator_tag)

1035

self.disable_initiator_tag = GLib.timeout_add(

1036

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

617

gobject.source_remove(self.disable_initiator_tag)

618

self.disable_initiator_tag = (gobject.timeout_add

619

(int(self.timeout

620

.total_seconds() * 1000),

621

self.disable))

1037

622

# Also start a new checker *right now*.

1038

623

self.start_checker()

1039

1040

def checker_callback(self, source, condition, connection,

1041

command):

624

625

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

1042

626

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

1043

# Read return code from connection (see call_pipe)

1044

returncode = connection.recv()

1045

connection.close()

1046

self.checker.join()

1047

627

self.checker_callback_tag = None

1048

628

self.checker = None

1049

1050

if returncode >= 0:

1051

self.last_checker_status = returncode

1052

self.last_checker_signal = None

629

if os.WIFEXITED(condition):

630

self.last_checker_status = os.WEXITSTATUS(condition)

1053

631

if self.last_checker_status == 0:

1054

632

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

1055

633

vars(self))

1056

634

self.checked_ok()

1057

635

else:

1058

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

636

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

637

vars(self))

1059

638

else:

1060

639

self.last_checker_status = -1

1061

self.last_checker_signal = -returncode

1062

640

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

1063

641

vars(self))

1064

return False

1065

642

1066

643

def checked_ok(self):

1067

644

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

1068

645

self.last_checked_ok = datetime.datetime.utcnow()

1069

646

self.last_checker_status = 0

1070

self.last_checker_signal = None

1071

647

self.bump_timeout()

1072

648

1073

649

def bump_timeout(self, timeout=None):

1074

650

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

1075

651

if timeout is None:

1076

652

timeout = self.timeout

1077

653

if self.disable_initiator_tag is not None:

1078

GLib.source_remove(self.disable_initiator_tag)

654

gobject.source_remove(self.disable_initiator_tag)

1079

655

self.disable_initiator_tag = None

1080

656

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

1081

self.disable_initiator_tag = GLib.timeout_add(

1082

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

657

self.disable_initiator_tag = (gobject.timeout_add

658

(int(timeout.total_seconds()

659

* 1000), self.disable))

1083

660

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

1084

661

1085

662

def need_approval(self):

1086

663

self.last_approval_request = datetime.datetime.utcnow()

1087

664

1088

665

def start_checker(self):

1089

666

"""Start a new checker subprocess if one is not running.

1090

667

1091

668

If a checker already exists, leave it running and do

1092

669

nothing."""

1093

670

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

1098

675

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

1099

676

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

1100

677

# should be.

1101

1102

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

1103

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

1104

self.checker.join()

1105

self.checker = None

678

679

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

680

try:

681

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

682

except AttributeError:

683

pass

684

except OSError as error:

685

if error.errno != errno.ECHILD:

686

raise

687

else:

688

if pid:

689

logger.warning("Checker was a zombie")

690

gobject.source_remove(self.checker_callback_tag)

691

self.checker_callback(pid, status,

692

self.current_checker_command)

1106

693

# Start a new checker if needed

1107

694

if self.checker is None:

1108

695

# Escape attributes for the shell

1109

escaped_attrs = {

1110

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

1111

for attr in self.runtime_expansions}

696

escaped_attrs = { attr:

697

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

698

for attr in self.runtime_expansions }

1112

699

try:

1113

700

command = self.checker_command % escaped_attrs

1114

701

except TypeError as error:

1115

702

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

1116

self.checker_command,

703

self.checker_command, exc_info=error)

704

return True # Try again later

705

self.current_checker_command = command

706

try:

707

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

708

command, self.name)

709

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

710

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

711

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

712

# always replaced by /dev/null.)

713

# The exception is when not debugging but nevertheless

714

# running in the foreground; use the previously

715

# created wnull.

716

popen_args = {}

717

if (not self.server_settings["debug"]

718

and self.server_settings["foreground"]):

719

popen_args.update({"stdout": wnull,

720

"stderr": wnull })

721

self.checker = subprocess.Popen(command,

722

close_fds=True,

723

shell=True, cwd="/",

724

**popen_args)

725

except OSError as error:

726

logger.error("Failed to start subprocess",

1117

727

exc_info=error)

1118

return True # Try again later

1119

self.current_checker_command = command

1120

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

1121

self.name)

1122

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

1123

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

1124

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

1125

# always replaced by /dev/null.)

1126

# The exception is when not debugging but nevertheless

1127

# running in the foreground; use the previously

1128

# created wnull.

1129

popen_args = {"close_fds": True,

1130

"shell": True,

1131

"cwd": "/"}

1132

if (not self.server_settings["debug"]

1133

and self.server_settings["foreground"]):

1134

popen_args.update({"stdout": wnull,

1135

"stderr": wnull})

1136

pipe = multiprocessing.Pipe(duplex=False)

1137

self.checker = multiprocessing.Process(

1138

target=call_pipe,

1139

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

1140

kwargs=popen_args)

1141

self.checker.start()

1142

self.checker_callback_tag = GLib.io_add_watch(

1143

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

1144

self.checker_callback, pipe[0], command)

1145

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

728

return True

729

self.checker_callback_tag = (gobject.child_watch_add

730

(self.checker.pid,

731

self.checker_callback,

732

data=command))

733

# The checker may have completed before the gobject

734

# watch was added. Check for this.

735

try:

736

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

737

except OSError as error:

738

if error.errno == errno.ECHILD:

739

# This should never happen

740

logger.error("Child process vanished",

741

exc_info=error)

742

return True

743

raise

744

if pid:

745

gobject.source_remove(self.checker_callback_tag)

746

self.checker_callback(pid, status, command)

747

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

1146

748

return True

1147

749

1148

750

def stop_checker(self):

1149

751

"""Force the checker process, if any, to stop."""

1150

752

if self.checker_callback_tag:

1151

GLib.source_remove(self.checker_callback_tag)

753

gobject.source_remove(self.checker_callback_tag)

1152

754

self.checker_callback_tag = None

1153

755

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

1154

756

return

1155

757

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

1156

self.checker.terminate()

758

try:

759

self.checker.terminate()

760

#time.sleep(0.5)

761

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

762

# self.checker.kill()

763

except OSError as error:

764

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

765

raise

1157

766

self.checker = None

1158

767

1159

768

1160

def dbus_service_property(dbus_interface,

1161

signature="v",

1162

access="readwrite",

1163

byte_arrays=False):

769

def dbus_service_property(dbus_interface, signature="v",

770

access="readwrite", byte_arrays=False):

1164

771

"""Decorators for marking methods of a DBusObjectWithProperties to

1165

772

become properties on the D-Bus.

1166

773

1167

774

The decorated method will be called with no arguments by "Get"

1168

775

and with one argument by "Set".

1169

776

1170

777

The parameters, where they are supported, are the same as

1171

778

dbus.service.method, except there is only "signature", since the

1172

779

type from Get() and the type sent to Set() is the same.

1176

783

if byte_arrays and signature != "ay":

1177

784

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

1178

785

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

1179

1180

786

def decorator(func):

1181

787

func._dbus_is_property = True

1182

788

func._dbus_interface = dbus_interface

1185

791

func._dbus_name = func.__name__

1186

792

if func._dbus_name.endswith("_dbus_property"):

1187

793

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

1188

func._dbus_get_args_options = {'byte_arrays': byte_arrays}

794

func._dbus_get_args_options = {'byte_arrays': byte_arrays }

1189

795

return func

1190

1191

796

return decorator

1192

797

1193

798

1194

799

def dbus_interface_annotations(dbus_interface):

1195

800

"""Decorator for marking functions returning interface annotations

1196

801

1197

802

Usage:

1198

803

1199

804

@dbus_interface_annotations("org.example.Interface")

1200

805

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

1201

806

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

1202

807

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

1203

808

"false"}

1204

809

"""

1205

1206

810

def decorator(func):

1207

811

func._dbus_is_interface = True

1208

812

func._dbus_interface = dbus_interface

1209

813

func._dbus_name = dbus_interface

1210

814

return func

1211

1212

815

return decorator

1213

816

1214

817

1215

818

def dbus_annotations(annotations):

1216

819

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

1217

820

Usage:

1218

821

1219

822

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

1220

823

"org.freedesktop.DBus.Property."

1221

824

"EmitsChangedSignal": "false"})

1223

826

access="r")

1224

827

def Property_dbus_property(self):

1225

828

return dbus.Boolean(False)

1226

1227

See also the DBusObjectWithAnnotations class.

1228

829

"""

1229

1230

830

def decorator(func):

1231

831

func._dbus_annotations = annotations

1232

832

return func

1233

1234

833

return decorator

1235

834

1236

835

1239

838

"""

1240

839

pass

1241

840

1242

1243

841

class DBusPropertyAccessException(DBusPropertyException):

1244

842

"""A property's access permissions disallows an operation.

1245

843

"""

1252

850

pass

1253

851

1254

852

1255

class DBusObjectWithAnnotations(dbus.service.Object):

1256

"""A D-Bus object with annotations.

1257

1258

Classes inheriting from this can use the dbus_annotations

1259

decorator to add annotations to methods or signals.

853

class DBusObjectWithProperties(dbus.service.Object):

854

"""A D-Bus object with properties.

855

856

Classes inheriting from this can use the dbus_service_property

857

decorator to expose methods as D-Bus properties. It exposes the

858

standard Get(), Set(), and GetAll() methods on the D-Bus.

1260

859

"""

1261

860

1262

861

@staticmethod

1263

862

def _is_dbus_thing(thing):

1264

863

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

1265

864

1266

865

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

1267

866

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

1268

867

"""

1269

868

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

1270

869

False)

1271

870

1272

871

def _get_all_dbus_things(self, thing):

1273

872

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

1274

873

"""

1275

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

874

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

875

name),

1276

876

athing.__get__(self))

1277

877

for cls in self.__class__.__mro__

1278

878

for name, athing in

1279

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

1280

1281

@dbus.service.method(dbus.INTROSPECTABLE_IFACE,

1282

out_signature="s",

1283

path_keyword='object_path',

1284

connection_keyword='connection')

1285

def Introspect(self, object_path, connection):

1286

"""Overloading of standard D-Bus method.

1287

1288

Inserts annotation tags on methods and signals.

1289

"""

1290

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

1291

connection)

1292

try:

1293

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

1294

1295

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

1296

# Add annotation tags

1297

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

1298

for tag in if_tag.getElementsByTagName(typ):

1299

annots = dict()

1300

for name, prop in (self.

1301

_get_all_dbus_things(typ)):

1302

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

1303

and prop._dbus_interface

1304

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

1305

annots.update(getattr(

1306

prop, "_dbus_annotations", {}))

1307

for name, value in annots.items():

1308

ann_tag = document.createElement(

1309

"annotation")

1310

ann_tag.setAttribute("name", name)

1311

ann_tag.setAttribute("value", value)

1312

tag.appendChild(ann_tag)

1313

# Add interface annotation tags

1314

for annotation, value in dict(

1315

itertools.chain.from_iterable(

1316

annotations().items()

1317

for name, annotations

1318

in self._get_all_dbus_things("interface")

1319

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

1320

)).items():

1321

ann_tag = document.createElement("annotation")

1322

ann_tag.setAttribute("name", annotation)

1323

ann_tag.setAttribute("value", value)

1324

if_tag.appendChild(ann_tag)

1325

# Fix argument name for the Introspect method itself

1326

if (if_tag.getAttribute("name")

1327

== dbus.INTROSPECTABLE_IFACE):

1328

for cn in if_tag.getElementsByTagName("method"):

1329

if cn.getAttribute("name") == "Introspect":

1330

for arg in cn.getElementsByTagName("arg"):

1331

if (arg.getAttribute("direction")

1332

== "out"):

1333

arg.setAttribute("name",

1334

"xml_data")

1335

xmlstring = document.toxml("utf-8")

1336

document.unlink()

1337

except (AttributeError, xml.dom.DOMException,

1338

xml.parsers.expat.ExpatError) as error:

1339

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

1340

exc_info=error)

1341

return xmlstring

1342

1343

1344

class DBusObjectWithProperties(DBusObjectWithAnnotations):

1345

"""A D-Bus object with properties.

1346

1347

Classes inheriting from this can use the dbus_service_property

1348

decorator to expose methods as D-Bus properties. It exposes the

1349

standard Get(), Set(), and GetAll() methods on the D-Bus.

1350

"""

1351

879

inspect.getmembers(cls,

880

self._is_dbus_thing(thing)))

881

1352

882

def _get_dbus_property(self, interface_name, property_name):

1353

883

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

1354

884

property with the specified name and interface.

1355

885

"""

1356

for cls in self.__class__.__mro__:

1357

for name, value in inspect.getmembers(

1358

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

886

for cls in self.__class__.__mro__:

887

for name, value in (inspect.getmembers

888

(cls,

889

self._is_dbus_thing("property"))):

1359

890

if (value._dbus_name == property_name

1360

891

and value._dbus_interface == interface_name):

1361

892

return value.__get__(self)

1362

893

1363

894

# No such property

1364

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

1365

self.dbus_object_path, interface_name, property_name))

1366

1367

@classmethod

1368

def _get_all_interface_names(cls):

1369

"""Get a sequence of all interfaces supported by an object"""

1370

return (name for name in set(getattr(getattr(x, attr),

1371

"_dbus_interface", None)

1372

for x in (inspect.getmro(cls))

1373

for attr in dir(x))

1374

if name is not None)

1375

1376

@dbus.service.method(dbus.PROPERTIES_IFACE,

1377

in_signature="ss",

895

raise DBusPropertyNotFound(self.dbus_object_path + ":"

896

+ interface_name + "."

897

+ property_name)

898

899

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

1378

900

out_signature="v")

1379

901

def Get(self, interface_name, property_name):

1380

902

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

1386

908

if not hasattr(value, "variant_level"):

1387

909

return value

1388

910

return type(value)(value, variant_level=value.variant_level+1)

1389

911

1390

912

@dbus.service.method(dbus.PROPERTIES_IFACE, in_signature="ssv")

1391

913

def Set(self, interface_name, property_name, value):

1392

914

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

1404

926

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

1405

927

for byte in value))

1406

928

prop(value)

1407

1408

@dbus.service.method(dbus.PROPERTIES_IFACE,

1409

in_signature="s",

929

930

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

1410

931

out_signature="a{sv}")

1411

932

def GetAll(self, interface_name):

1412

933

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

1413

934

standard.

1414

935

1415

936

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

1416

937

"""

1417

938

properties = {}

1427

948

if not hasattr(value, "variant_level"):

1428

949

properties[name] = value

1429

950

continue

1430

properties[name] = type(value)(

1431

value, variant_level=value.variant_level + 1)

951

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

952

value.variant_level+1)

1432

953

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

1433

954

1434

955

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

1435

956

def PropertiesChanged(self, interface_name, changed_properties,

1436

957

invalidated_properties):

1438

959

standard.

1439

960

"""

1440

961

pass

1441

962

1442

963

@dbus.service.method(dbus.INTROSPECTABLE_IFACE,

1443

964

out_signature="s",

1444

965

path_keyword='object_path',

1445

966

connection_keyword='connection')

1446

967

def Introspect(self, object_path, connection):

1447

968

"""Overloading of standard D-Bus method.

1448

969

1449

970

Inserts property tags and interface annotation tags.

1450

971

"""

1451

xmlstring = DBusObjectWithAnnotations.Introspect(self,

1452

object_path,

1453

connection)

972

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

973

connection)

1454

974

try:

1455

975

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

1456

1457

976

def make_tag(document, name, prop):

1458

977

e = document.createElement("property")

1459

978

e.setAttribute("name", name)

1460

979

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

1461

980

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

1462

981

return e

1463

1464

982

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

1465

983

# Add property tags

1466

984

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

1469

987

if prop._dbus_interface

1470

988

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

1471

989

if_tag.appendChild(tag)

1472

# Add annotation tags for properties

1473

for tag in if_tag.getElementsByTagName("property"):

1474

annots = dict()

1475

for name, prop in self._get_all_dbus_things(

1476

"property"):

1477

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

1478

and prop._dbus_interface

1479

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

1480

annots.update(getattr(

1481

prop, "_dbus_annotations", {}))

1482

for name, value in annots.items():

1483

ann_tag = document.createElement(

1484

"annotation")

1485

ann_tag.setAttribute("name", name)

1486

ann_tag.setAttribute("value", value)

1487

tag.appendChild(ann_tag)

990

# Add annotation tags

991

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

992

for tag in if_tag.getElementsByTagName(typ):

993

annots = dict()

994

for name, prop in (self.

995

_get_all_dbus_things(typ)):

996

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

997

and prop._dbus_interface

998

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

999

annots.update(getattr

1000

(prop,

1001

"_dbus_annotations",

1002

{}))

1003

for name, value in annots.items():

1004

ann_tag = document.createElement(

1005

"annotation")

1006

ann_tag.setAttribute("name", name)

1007

ann_tag.setAttribute("value", value)

1008

tag.appendChild(ann_tag)

1009

# Add interface annotation tags

1010

for annotation, value in dict(

1011

itertools.chain.from_iterable(

1012

annotations().items()

1013

for name, annotations in

1014

self._get_all_dbus_things("interface")

1015

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

1016

)).items():

1017

ann_tag = document.createElement("annotation")

1018

ann_tag.setAttribute("name", annotation)

1019

ann_tag.setAttribute("value", value)

1020

if_tag.appendChild(ann_tag)

1488

1021

# Add the names to the return values for the

1489

1022

# "org.freedesktop.DBus.Properties" methods

1490

1023

if (if_tag.getAttribute("name")

1509

1042

return xmlstring

1510

1043

1511

1044

1512

try:

1513

dbus.OBJECT_MANAGER_IFACE

1514

except AttributeError:

1515

dbus.OBJECT_MANAGER_IFACE = "org.freedesktop.DBus.ObjectManager"

1516

1517

1518

class DBusObjectWithObjectManager(DBusObjectWithAnnotations):

1519

"""A D-Bus object with an ObjectManager.

1520

1521

Classes inheriting from this exposes the standard

1522

GetManagedObjects call and the InterfacesAdded and

1523

InterfacesRemoved signals on the standard

1524

"org.freedesktop.DBus.ObjectManager" interface.

1525

1526

Note: No signals are sent automatically; they must be sent

1527

manually.

1528

"""

1529

@dbus.service.method(dbus.OBJECT_MANAGER_IFACE,

1530

out_signature="a{oa{sa{sv}}}")

1531

def GetManagedObjects(self):

1532

"""This function must be overridden"""

1533

raise NotImplementedError()

1534

1535

@dbus.service.signal(dbus.OBJECT_MANAGER_IFACE,

1536

signature="oa{sa{sv}}")

1537

def InterfacesAdded(self, object_path, interfaces_and_properties):

1538

pass

1539

1540

@dbus.service.signal(dbus.OBJECT_MANAGER_IFACE, signature="oas")

1541

def InterfacesRemoved(self, object_path, interfaces):

1542

pass

1543

1544

@dbus.service.method(dbus.INTROSPECTABLE_IFACE,

1545

out_signature="s",

1546

path_keyword='object_path',

1547

connection_keyword='connection')

1548

def Introspect(self, object_path, connection):

1549

"""Overloading of standard D-Bus method.

1550

1551

Override return argument name of GetManagedObjects to be

1552

"objpath_interfaces_and_properties"

1553

"""

1554

xmlstring = DBusObjectWithAnnotations.Introspect(self,

1555

object_path,

1556

connection)

1557

try:

1558

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

1559

1560

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

1561

# Fix argument name for the GetManagedObjects method

1562

if (if_tag.getAttribute("name")

1563

== dbus.OBJECT_MANAGER_IFACE):

1564

for cn in if_tag.getElementsByTagName("method"):

1565

if (cn.getAttribute("name")

1566

== "GetManagedObjects"):

1567

for arg in cn.getElementsByTagName("arg"):

1568

if (arg.getAttribute("direction")

1569

== "out"):

1570

arg.setAttribute(

1571

"name",

1572

"objpath_interfaces"

1573

"_and_properties")

1574

xmlstring = document.toxml("utf-8")

1575

document.unlink()

1576

except (AttributeError, xml.dom.DOMException,

1577

xml.parsers.expat.ExpatError) as error:

1578

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

1579

exc_info=error)

1580

return xmlstring

1581

1582

1583

1045

def datetime_to_dbus(dt, variant_level=0):

1584

1046

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

1585

1047

if dt is None:

1586

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

1587

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

1048

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

1049

return dbus.String(dt.isoformat(),

1050

variant_level=variant_level)

1588

1051

1589

1052

1590

1053

def alternate_dbus_interfaces(alt_interface_names, deprecate=True):

1592

1055

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

1593

1056

interface names according to the "alt_interface_names" mapping.

1594

1057

Usage:

1595

1058

1596

1059

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

1597

1060

"net.example.AlternateInterface"})

1598

1061

class SampleDBusObject(dbus.service.Object):

1599

1062

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

1600

1063

def SampleDBusMethod():

1601

1064

pass

1602

1065

1603

1066

The above "SampleDBusMethod" on "SampleDBusObject" will be

1604

1067

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

1605

1068

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

1606

1069

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

1607

1070

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

1608

1071

1609

1072

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

1610

1073

(from DBusObjectWithProperties) and interfaces (from the

1611

1074

dbus_interface_annotations decorator).

1612

1075

"""

1613

1614

1076

def wrapper(cls):

1615

1077

for orig_interface_name, alt_interface_name in (

1616

alt_interface_names.items()):

1078

alt_interface_names.items()):

1617

1079

attr = {}

1618

1080

interface_names = set()

1619

1081

# Go though all attributes of the class

1621

1083

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

1622

1084

# with the wrong interface name

1623

1085

if (not hasattr(attribute, "_dbus_interface")

1624

or not attribute._dbus_interface.startswith(

1625

orig_interface_name)):

1086

or not attribute._dbus_interface

1087

.startswith(orig_interface_name)):

1626

1088

continue

1627

1089

# Create an alternate D-Bus interface name based on

1628

1090

# the current name

1629

alt_interface = attribute._dbus_interface.replace(

1630

orig_interface_name, alt_interface_name)

1091

alt_interface = (attribute._dbus_interface

1092

.replace(orig_interface_name,

1093

alt_interface_name))

1631

1094

interface_names.add(alt_interface)

1632

1095

# Is this a D-Bus signal?

1633

1096

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

1634

1097

# Extract the original non-method undecorated

1635

1098

# function by black magic

1636

if sys.version_info.major == 2:

1637

nonmethod_func = (dict(

1099

nonmethod_func = (dict(

1638

1100

zip(attribute.func_code.co_freevars,

1639

attribute.__closure__))

1640

["func"].cell_contents)

1641

else:

1642

nonmethod_func = (dict(

1643

zip(attribute.__code__.co_freevars,

1644

attribute.__closure__))

1645

["func"].cell_contents)

1101

attribute.__closure__))["func"]

1102

.cell_contents)

1646

1103

# Create a new, but exactly alike, function

1647

1104

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

1648

1105

# with the alternate D-Bus interface name

1649

new_function = copy_function(nonmethod_func)

1650

new_function = (dbus.service.signal(

1651

alt_interface,

1652

attribute._dbus_signature)(new_function))

1106

new_function = (dbus.service.signal

1107

(alt_interface,

1108

attribute._dbus_signature)

1109

(types.FunctionType(

1110

nonmethod_func.func_code,

1111

nonmethod_func.func_globals,

1112

nonmethod_func.func_name,

1113

nonmethod_func.func_defaults,

1114

nonmethod_func.func_closure)))

1653

1115

# Copy annotations, if any

1654

1116

try:

1655

new_function._dbus_annotations = dict(

1656

attribute._dbus_annotations)

1117

new_function._dbus_annotations = (

1118

dict(attribute._dbus_annotations))

1657

1119

except AttributeError:

1658

1120

pass

1659

1660

1121

# Define a creator of a function to call both the

1661

1122

# original and alternate functions, so both the

1662

1123

# original and alternate signals gets sent when

1665

1126

"""This function is a scope container to pass

1666

1127

func1 and func2 to the "call_both" function

1667

1128

outside of its arguments"""

1668

1669

@functools.wraps(func2)

1670

1129

def call_both(*args, **kwargs):

1671

1130

"""This function will emit two D-Bus

1672

1131

signals by calling func1 and func2"""

1673

1132

func1(*args, **kwargs)

1674

1133

func2(*args, **kwargs)

1675

# Make wrapper function look like a D-Bus

1676

# signal

1677

for name, attr in inspect.getmembers(func2):

1678

if name.startswith("_dbus_"):

1679

setattr(call_both, name, attr)

1680

1681

1134

return call_both

1682

1135

# Create the "call_both" function and add it to

1683

1136

# the class

1688

1141

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

1689

1142

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

1690

1143

# to the class.

1691

attr[attrname] = (

1692

dbus.service.method(

1693

alt_interface,

1694

attribute._dbus_in_signature,

1695

attribute._dbus_out_signature)

1696

(copy_function(attribute)))

1144

attr[attrname] = (dbus.service.method

1145

(alt_interface,

1146

attribute._dbus_in_signature,

1147

attribute._dbus_out_signature)

1148

(types.FunctionType

1149

(attribute.func_code,

1150

attribute.func_globals,

1151

attribute.func_name,

1152

attribute.func_defaults,

1153

attribute.func_closure)))

1697

1154

# Copy annotations, if any

1698

1155

try:

1699

attr[attrname]._dbus_annotations = dict(

1700

attribute._dbus_annotations)

1156

attr[attrname]._dbus_annotations = (

1157

dict(attribute._dbus_annotations))

1701

1158

except AttributeError:

1702

1159

pass

1703

1160

# Is this a D-Bus property?

1706

1163

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

1707

1164

# property with the alternate D-Bus interface

1708

1165

# name. Add it to the class.

1709

attr[attrname] = (dbus_service_property(

1710

alt_interface, attribute._dbus_signature,

1711

attribute._dbus_access,

1712

attribute._dbus_get_args_options

1713

["byte_arrays"])

1714

(copy_function(attribute)))

1166

attr[attrname] = (dbus_service_property

1167

(alt_interface,

1168

attribute._dbus_signature,

1169

attribute._dbus_access,

1170

attribute

1171

._dbus_get_args_options

1172

["byte_arrays"])

1173

(types.FunctionType

1174

(attribute.func_code,

1175

attribute.func_globals,

1176

attribute.func_name,

1177

attribute.func_defaults,

1178

attribute.func_closure)))

1715

1179

# Copy annotations, if any

1716

1180

try:

1717

attr[attrname]._dbus_annotations = dict(

1718

attribute._dbus_annotations)

1181

attr[attrname]._dbus_annotations = (

1182

dict(attribute._dbus_annotations))

1719

1183

except AttributeError:

1720

1184

pass

1721

1185

# Is this a D-Bus interface?

1724

1188

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

1725

1189

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

1726

1190

# to the class.

1727

attr[attrname] = (

1728

dbus_interface_annotations(alt_interface)

1729

(copy_function(attribute)))

1191

attr[attrname] = (dbus_interface_annotations

1192

(alt_interface)

1193

(types.FunctionType

1194

(attribute.func_code,

1195

attribute.func_globals,

1196

attribute.func_name,

1197

attribute.func_defaults,

1198

attribute.func_closure)))

1730

1199

if deprecate:

1731

1200

# Deprecate all alternate interfaces

1732

iname = "_AlternateDBusNames_interface_annotation{}"

1201

iname="_AlternateDBusNames_interface_annotation{}"

1733

1202

for interface_name in interface_names:

1734

1735

1203

@dbus_interface_annotations(interface_name)

1736

1204

def func(self):

1737

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

1738

"true"}

1205

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

1206

"true" }

1739

1207

# Find an unused name

1740

1208

for aname in (iname.format(i)

1741

1209

for i in itertools.count()):

1745

1213

if interface_names:

1746

1214

# Replace the class with a new subclass of it with

1747

1215

# methods, signals, etc. as created above.

1748

if sys.version_info.major == 2:

1749

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

1750

(cls, ), attr)

1751

else:

1752

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

1753

(cls, ), attr)

1216

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

1217

(cls,), attr)

1754

1218

return cls

1755

1756

1219

return wrapper

1757

1220

1758

1221

1759

1222

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

1760

"se.bsnet.fukt.Mandos"})

1223

"se.bsnet.fukt.Mandos"})

1761

1224

class ClientDBus(Client, DBusObjectWithProperties):

1762

1225

"""A Client class using D-Bus

1763

1226

1764

1227

Attributes:

1765

1228

dbus_object_path: dbus.ObjectPath

1766

1229

bus: dbus.SystemBus()

1767

1230

"""

1768

1231

1769

1232

runtime_expansions = (Client.runtime_expansions

1770

+ ("dbus_object_path", ))

1771

1233

+ ("dbus_object_path",))

1234

1772

1235

_interface = "se.recompile.Mandos.Client"

1773

1236

1774

1237

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

1775

1776

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

1238

1239

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

1777

1240

self.bus = bus

1778

1241

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

1779

1242

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

1781

1244

client_object_name = str(self.name).translate(

1782

1245

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

1783

1246

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

1784

self.dbus_object_path = dbus.ObjectPath(

1785

"/clients/" + client_object_name)

1247

self.dbus_object_path = (dbus.ObjectPath

1248

("/clients/" + client_object_name))

1786

1249

DBusObjectWithProperties.__init__(self, self.bus,

1787

1250

self.dbus_object_path)

1788

1789

def notifychangeproperty(transform_func, dbus_name,

1790

type_func=lambda x: x,

1791

variant_level=1,

1792

invalidate_only=False,

1251

1252

def notifychangeproperty(transform_func,

1253

dbus_name, type_func=lambda x: x,

1254

variant_level=1, invalidate_only=False,

1793

1255

_interface=_interface):

1794

1256

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

1795

1257

its changes to DBus.

1796

1258

1797

1259

transform_fun: Function that takes a value and a variant_level

1798

1260

and transforms it to a D-Bus type.

1799

1261

dbus_name: D-Bus name of the variable

1802

1264

variant_level: D-Bus variant level. Default: 1

1803

1265

"""

1804

1266

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

1805

1806

1267

def setter(self, value):

1807

1268

if hasattr(self, "dbus_object_path"):

1808

1269

if (not hasattr(self, attrname) or

1809

1270

type_func(getattr(self, attrname, None))

1810

1271

!= type_func(value)):

1811

1272

if invalidate_only:

1812

self.PropertiesChanged(

1813

_interface, dbus.Dictionary(),

1814

dbus.Array((dbus_name, )))

1273

self.PropertiesChanged(_interface,

1274

dbus.Dictionary(),

1275

dbus.Array

1276

((dbus_name,)))

1815

1277

else:

1816

dbus_value = transform_func(

1817

type_func(value),

1818

variant_level=variant_level)

1278

dbus_value = transform_func(type_func(value),

1279

variant_level

1280

=variant_level)

1819

1281

self.PropertyChanged(dbus.String(dbus_name),

1820

1282

dbus_value)

1821

self.PropertiesChanged(

1822

_interface,

1823

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

1824

dbus_value}),

1825

dbus.Array())

1283

self.PropertiesChanged(_interface,

1284

dbus.Dictionary({

1285

dbus.String(dbus_name):

1286

dbus_value }), dbus.Array())

1826

1287

setattr(self, attrname, value)

1827

1288

1828

1289

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

1829

1290

1830

1291

expires = notifychangeproperty(datetime_to_dbus, "Expires")

1831

1292

approvals_pending = notifychangeproperty(dbus.Boolean,

1832

1293

"ApprovalPending",

1833

type_func=bool)

1294

type_func = bool)

1834

1295

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

1835

1296

last_enabled = notifychangeproperty(datetime_to_dbus,

1836

1297

"LastEnabled")

1837

checker = notifychangeproperty(

1838

dbus.Boolean, "CheckerRunning",

1839

type_func=lambda checker: checker is not None)

1298

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

1299

type_func = lambda checker:

1300

checker is not None)

1840

1301

last_checked_ok = notifychangeproperty(datetime_to_dbus,

1841

1302

"LastCheckedOK")

1842

1303

last_checker_status = notifychangeproperty(dbus.Int16,

1845

1306

datetime_to_dbus, "LastApprovalRequest")

1846

1307

approved_by_default = notifychangeproperty(dbus.Boolean,

1847

1308

"ApprovedByDefault")

1848

approval_delay = notifychangeproperty(

1849

dbus.UInt64, "ApprovalDelay",

1850

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

1309

approval_delay = notifychangeproperty(dbus.UInt64,

1310

"ApprovalDelay",

1311

type_func =

1312

lambda td: td.total_seconds()

1313

* 1000)

1851

1314

approval_duration = notifychangeproperty(

1852

1315

dbus.UInt64, "ApprovalDuration",

1853

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

1316

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

1854

1317

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

1855

timeout = notifychangeproperty(

1856

dbus.UInt64, "Timeout",

1857

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

1318

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

1319

type_func = lambda td:

1320

td.total_seconds() * 1000)

1858

1321

extended_timeout = notifychangeproperty(

1859

1322

dbus.UInt64, "ExtendedTimeout",

1860

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

1861

interval = notifychangeproperty(

1862

dbus.UInt64, "Interval",

1863

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

1323

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

1324

interval = notifychangeproperty(dbus.UInt64,

1325

"Interval",

1326

type_func =

1327

lambda td: td.total_seconds()

1328

* 1000)

1864

1329

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

1865

1330

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

1866

1331

invalidate_only=True)

1867

1332

1868

1333

del notifychangeproperty

1869

1334

1870

1335

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

1871

1336

try:

1872

1337

self.remove_from_connection()

1875

1340

if hasattr(DBusObjectWithProperties, "__del__"):

1876

1341

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

1877

1342

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

1878

1879

def checker_callback(self, source, condition,

1880

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

1881

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

1882

connection, command, *args,

1883

**kwargs)

1884

exitstatus = self.last_checker_status

1885

if exitstatus >= 0:

1343

1344

def checker_callback(self, pid, condition, command,

1345

*args, **kwargs):

1346

self.checker_callback_tag = None

1347

self.checker = None

1348

if os.WIFEXITED(condition):

1349

exitstatus = os.WEXITSTATUS(condition)

1886

1350

# Emit D-Bus signal

1887

1351

self.CheckerCompleted(dbus.Int16(exitstatus),

1888

# This is specific to GNU libC

1889

dbus.Int64(exitstatus << 8),

1352

dbus.Int64(condition),

1890

1353

dbus.String(command))

1891

1354

else:

1892

1355

# Emit D-Bus signal

1893

1356

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

1894

dbus.Int64(

1895

# This is specific to GNU libC

1896

(exitstatus << 8)

1897

| self.last_checker_signal),

1357

dbus.Int64(condition),

1898

1358

dbus.String(command))

1899

return ret

1900

1359

1360

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

1361

*args, **kwargs)

1362

1901

1363

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

1902

1364

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

1903

1365

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

1907

1369

# Emit D-Bus signal

1908

1370

self.CheckerStarted(self.current_checker_command)

1909

1371

return r

1910

1372

1911

1373

def _reset_approved(self):

1912

1374

self.approved = None

1913

1375

return False

1914

1376

1915

1377

def approve(self, value=True):

1916

1378

self.approved = value

1917

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

1918

* 1000), self._reset_approved)

1379

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

1380

* 1000), self._reset_approved)

1919

1381

self.send_changedstate()

1920

1921

# D-Bus methods, signals & properties

1922

1923

# Interfaces

1924

1925

# Signals

1926

1382

1383

## D-Bus methods, signals & properties

1384

1385

## Interfaces

1386

1387

## Signals

1388

1927

1389

# CheckerCompleted - signal

1928

1390

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

1929

1391

def CheckerCompleted(self, exitcode, waitstatus, command):

1930

1392

"D-Bus signal"

1931

1393

pass

1932

1394

1933

1395

# CheckerStarted - signal

1934

1396

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

1935

1397

def CheckerStarted(self, command):

1936

1398

"D-Bus signal"

1937

1399

pass

1938

1400

1939

1401

# PropertyChanged - signal

1940

1402

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

1941

1403

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

1942

1404

def PropertyChanged(self, property, value):

1943

1405

"D-Bus signal"

1944

1406

pass

1945

1407

1946

1408

# GotSecret - signal

1947

1409

@dbus.service.signal(_interface)

1948

1410

def GotSecret(self):

1951

1413

server to mandos-client

1952

1414

"""

1953

1415

pass

1954

1416

1955

1417

# Rejected - signal

1956

1418

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

1957

1419

def Rejected(self, reason):

1958

1420

"D-Bus signal"

1959

1421

pass

1960

1422

1961

1423

# NeedApproval - signal

1962

1424

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

1963

1425

def NeedApproval(self, timeout, default):

1964

1426

"D-Bus signal"

1965

1427

return self.need_approval()

1966

1967

# Methods

1968

1428

1429

## Methods

1430

1969

1431

# Approve - method

1970

1432

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

1971

1433

def Approve(self, value):

1972

1434

self.approve(value)

1973

1435

1974

1436

# CheckedOK - method

1975

1437

@dbus.service.method(_interface)

1976

1438

def CheckedOK(self):

1977

1439

self.checked_ok()

1978

1440

1979

1441

# Enable - method

1980

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

1981

1442

@dbus.service.method(_interface)

1982

1443

def Enable(self):

1983

1444

"D-Bus method"

1984

1445

self.enable()

1985

1446

1986

1447

# StartChecker - method

1987

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

1988

1448

@dbus.service.method(_interface)

1989

1449

def StartChecker(self):

1990

1450

"D-Bus method"

1991

1451

self.start_checker()

1992

1452

1993

1453

# Disable - method

1994

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

1995

1454

@dbus.service.method(_interface)

1996

1455

def Disable(self):

1997

1456

"D-Bus method"

1998

1457

self.disable()

1999

1458

2000

1459

# StopChecker - method

2001

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

2002

1460

@dbus.service.method(_interface)

2003

1461

def StopChecker(self):

2004

1462

self.stop_checker()

2005

2006

# Properties

2007

1463

1464

## Properties

1465

2008

1466

# ApprovalPending - property

2009

1467

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

2010

1468

def ApprovalPending_dbus_property(self):

2011

1469

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

2012

1470

2013

1471

# ApprovedByDefault - property

2014

@dbus_service_property(_interface,

2015

signature="b",

1472

@dbus_service_property(_interface, signature="b",

2016

1473

access="readwrite")

2017

1474

def ApprovedByDefault_dbus_property(self, value=None):

2018

1475

if value is None: # get

2019

1476

return dbus.Boolean(self.approved_by_default)

2020

1477

self.approved_by_default = bool(value)

2021

1478

2022

1479

# ApprovalDelay - property

2023

@dbus_service_property(_interface,

2024

signature="t",

1480

@dbus_service_property(_interface, signature="t",

2025

1481

access="readwrite")

2026

1482

def ApprovalDelay_dbus_property(self, value=None):

2027

1483

if value is None: # get

2028

1484

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

2029

1485

* 1000)

2030

1486

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

2031

1487

2032

1488

# ApprovalDuration - property

2033

@dbus_service_property(_interface,

2034

signature="t",

1489

@dbus_service_property(_interface, signature="t",

2035

1490

access="readwrite")

2036

1491

def ApprovalDuration_dbus_property(self, value=None):

2037

1492

if value is None: # get

2038

1493

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

2039

1494

* 1000)

2040

1495

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

2041

1496

2042

1497

# Name - property

2043

@dbus_annotations(

2044

{"org.freedesktop.DBus.Property.EmitsChangedSignal": "const"})

2045

1498

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

2046

1499

def Name_dbus_property(self):

2047

1500

return dbus.String(self.name)

2048

2049

# KeyID - property

2050

@dbus_annotations(

2051

{"org.freedesktop.DBus.Property.EmitsChangedSignal": "const"})

2052

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

2053

def KeyID_dbus_property(self):

2054

return dbus.String(self.key_id)

2055

1501

2056

1502

# Fingerprint - property

2057

@dbus_annotations(

2058

{"org.freedesktop.DBus.Property.EmitsChangedSignal": "const"})

2059

1503

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

2060

1504

def Fingerprint_dbus_property(self):

2061

1505

return dbus.String(self.fingerprint)

2062

1506

2063

1507

# Host - property

2064

@dbus_service_property(_interface,

2065

signature="s",

1508

@dbus_service_property(_interface, signature="s",

2066

1509

access="readwrite")

2067

1510

def Host_dbus_property(self, value=None):

2068

1511

if value is None: # get

2069

1512

return dbus.String(self.host)

2070

1513

self.host = str(value)

2071

1514

2072

1515

# Created - property

2073

@dbus_annotations(

2074

{"org.freedesktop.DBus.Property.EmitsChangedSignal": "const"})

2075

1516

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

2076

1517

def Created_dbus_property(self):

2077

1518

return datetime_to_dbus(self.created)

2078

1519

2079

1520

# LastEnabled - property

2080

1521

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

2081

1522

def LastEnabled_dbus_property(self):

2082

1523

return datetime_to_dbus(self.last_enabled)

2083

1524

2084

1525

# Enabled - property

2085

@dbus_service_property(_interface,

2086

signature="b",

1526

@dbus_service_property(_interface, signature="b",

2087

1527

access="readwrite")

2088

1528

def Enabled_dbus_property(self, value=None):

2089

1529

if value is None: # get

2092

1532

self.enable()

2093

1533

else:

2094

1534

self.disable()

2095

1535

2096

1536

# LastCheckedOK - property

2097

@dbus_service_property(_interface,

2098

signature="s",

1537

@dbus_service_property(_interface, signature="s",

2099

1538

access="readwrite")

2100

1539

def LastCheckedOK_dbus_property(self, value=None):

2101

1540

if value is not None:

2102

1541

self.checked_ok()

2103

1542

return

2104

1543

return datetime_to_dbus(self.last_checked_ok)

2105

1544

2106

1545

# LastCheckerStatus - property

2107

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

1546

@dbus_service_property(_interface, signature="n",

1547

access="read")

2108

1548

def LastCheckerStatus_dbus_property(self):

2109

1549

return dbus.Int16(self.last_checker_status)

2110

1550

2111

1551

# Expires - property

2112

1552

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

2113

1553

def Expires_dbus_property(self):

2114

1554

return datetime_to_dbus(self.expires)

2115

1555

2116

1556

# LastApprovalRequest - property

2117

1557

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

2118

1558

def LastApprovalRequest_dbus_property(self):

2119

1559

return datetime_to_dbus(self.last_approval_request)

2120

1560

2121

1561

# Timeout - property

2122

@dbus_service_property(_interface,

2123

signature="t",

1562

@dbus_service_property(_interface, signature="t",

2124

1563

access="readwrite")

2125

1564

def Timeout_dbus_property(self, value=None):

2126

1565

if value is None: # get

2138

1577

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

2139

1578

is None):

2140

1579

return

2141

GLib.source_remove(self.disable_initiator_tag)

2142

self.disable_initiator_tag = GLib.timeout_add(

2143

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

2144

self.disable)

2145

1580

gobject.source_remove(self.disable_initiator_tag)

1581

self.disable_initiator_tag = (

1582

gobject.timeout_add(

1583

int((self.expires - now).total_seconds()

1584

* 1000), self.disable))

1585

2146

1586

# ExtendedTimeout - property

2147

@dbus_service_property(_interface,

2148

signature="t",

1587

@dbus_service_property(_interface, signature="t",

2149

1588

access="readwrite")

2150

1589

def ExtendedTimeout_dbus_property(self, value=None):

2151

1590

if value is None: # get

2152

1591

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

2153

1592

* 1000)

2154

1593

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

2155

1594

2156

1595

# Interval - property

2157

@dbus_service_property(_interface,

2158

signature="t",

1596

@dbus_service_property(_interface, signature="t",

2159

1597

access="readwrite")

2160

1598

def Interval_dbus_property(self, value=None):

2161

1599

if value is None: # get

2165

1603

return

2166

1604

if self.enabled:

2167

1605

# Reschedule checker run

2168

GLib.source_remove(self.checker_initiator_tag)

2169

self.checker_initiator_tag = GLib.timeout_add(

2170

value, self.start_checker)

2171

self.start_checker() # Start one now, too

2172

1606

gobject.source_remove(self.checker_initiator_tag)

1607

self.checker_initiator_tag = (gobject.timeout_add

1608

(value, self.start_checker))

1609

self.start_checker() # Start one now, too

1610

2173

1611

# Checker - property

2174

@dbus_service_property(_interface,

2175

signature="s",

1612

@dbus_service_property(_interface, signature="s",

2176

1613

access="readwrite")

2177

1614

def Checker_dbus_property(self, value=None):

2178

1615

if value is None: # get

2179

1616

return dbus.String(self.checker_command)

2180

1617

self.checker_command = str(value)

2181

1618

2182

1619

# CheckerRunning - property

2183

@dbus_service_property(_interface,

2184

signature="b",

1620

@dbus_service_property(_interface, signature="b",

2185

1621

access="readwrite")

2186

1622

def CheckerRunning_dbus_property(self, value=None):

2187

1623

if value is None: # get

2190

1626

self.start_checker()

2191

1627

else:

2192

1628

self.stop_checker()

2193

1629

2194

1630

# ObjectPath - property

2195

@dbus_annotations(

2196

{"org.freedesktop.DBus.Property.EmitsChangedSignal": "const",

2197

"org.freedesktop.DBus.Deprecated": "true"})

2198

1631

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

2199

1632

def ObjectPath_dbus_property(self):

2200

return self.dbus_object_path # is already a dbus.ObjectPath

2201

1633

return self.dbus_object_path # is already a dbus.ObjectPath

1634

2202

1635

# Secret = property

2203

@dbus_annotations(

2204

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

2205

"invalidates"})

2206

@dbus_service_property(_interface,

2207

signature="ay",

2208

access="write",

2209

byte_arrays=True)

1636

@dbus_service_property(_interface, signature="ay",

1637

access="write", byte_arrays=True)

2210

1638

def Secret_dbus_property(self, value):

2211

1639

self.secret = bytes(value)

2212

1640

2213

1641

del _interface

2214

1642

2215

1643

2216

1644

class ProxyClient(object):

2217

def __init__(self, child_pipe, key_id, fpr, address):

1645

def __init__(self, child_pipe, fpr, address):

2218

1646

self._pipe = child_pipe

2219

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

1647

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

2220

1648

if not self._pipe.recv():

2221

raise KeyError(key_id or fpr)

2222

1649

raise KeyError()

1650

2223

1651

def __getattribute__(self, name):

2224

1652

if name == '_pipe':

2225

1653

return super(ProxyClient, self).__getattribute__(name)

2228

1656

if data[0] == 'data':

2229

1657

return data[1]

2230

1658

if data[0] == 'function':

2231

2232

1659

def func(*args, **kwargs):

2233

1660

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

2234

1661

return self._pipe.recv()[1]

2235

2236

1662

return func

2237

1663

2238

1664

def __setattr__(self, name, value):

2239

1665

if name == '_pipe':

2240

1666

return super(ProxyClient, self).__setattr__(name, value)

2243

1669

2244

1670

class ClientHandler(socketserver.BaseRequestHandler, object):

2245

1671

"""A class to handle client connections.

2246

1672

2247

1673

Instantiated once for each connection to handle it.

2248

1674

Note: This will run in its own forked process."""

2249

1675

2250

1676

def handle(self):

2251

1677

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

2252

1678

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

2253

1679

str(self.client_address))

2254

1680

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

2255

1681

self.server.child_pipe.fileno())

2256

2257

session = gnutls.ClientSession(self.request)

2258

2259

# priority = ':'.join(("NONE", "+VERS-TLS1.1",

2260

# "+AES-256-CBC", "+SHA1",

2261

# "+COMP-NULL", "+CTYPE-OPENPGP",

2262

# "+DHE-DSS"))

1682

1683

session = (gnutls.connection

1684

.ClientSession(self.request,

1685

gnutls.connection

1686

.X509Credentials()))

1687

1688

# Note: gnutls.connection.X509Credentials is really a

1689

# generic GnuTLS certificate credentials object so long as

1690

# no X.509 keys are added to it. Therefore, we can use it

1691

# here despite using OpenPGP certificates.

1692

1693

#priority = ':'.join(("NONE", "+VERS-TLS1.1",

1694

# "+AES-256-CBC", "+SHA1",

1695

# "+COMP-NULL", "+CTYPE-OPENPGP",

1696

# "+DHE-DSS"))

2263

1697

# Use a fallback default, since this MUST be set.

2264

1698

priority = self.server.gnutls_priority

2265

1699

if priority is None:

2266

1700

priority = "NORMAL"

2267

gnutls.priority_set_direct(session._c_object,

2268

priority.encode("utf-8"),

2269

None)

2270

1701

(gnutls.library.functions

1702

.gnutls_priority_set_direct(session._c_object,

1703

priority, None))

1704

2271

1705

# Start communication using the Mandos protocol

2272

1706

# Get protocol number

2273

1707

line = self.request.makefile().readline()

2278

1712

except (ValueError, IndexError, RuntimeError) as error:

2279

1713

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

2280

1714

return

2281

1715

2282

1716

# Start GnuTLS connection

2283

1717

try:

2284

1718

session.handshake()

2285

except gnutls.Error as error:

1719

except gnutls.errors.GNUTLSError as error:

2286

1720

logger.warning("Handshake failed: %s", error)

2287

1721

# Do not run session.bye() here: the session is not

2288

1722

# established. Just abandon the request.

2289

1723

return

2290

1724

logger.debug("Handshake succeeded")

2291

1725

2292

1726

approval_required = False

2293

1727

try:

2294

if gnutls.has_rawpk:

2295

fpr = b""

2296

try:

2297

key_id = self.key_id(

2298

self.peer_certificate(session))

2299

except (TypeError, gnutls.Error) as error:

2300

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

2301

return

2302

logger.debug("Key ID: %s", key_id)

2303

2304

else:

2305

key_id = b""

2306

try:

2307

fpr = self.fingerprint(

2308

self.peer_certificate(session))

2309

except (TypeError, gnutls.Error) as error:

2310

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

2311

return

2312

logger.debug("Fingerprint: %s", fpr)

2313

2314

try:

2315

client = ProxyClient(child_pipe, key_id, fpr,

1728

try:

1729

fpr = self.fingerprint(self.peer_certificate

1730

(session))

1731

except (TypeError,

1732

gnutls.errors.GNUTLSError) as error:

1733

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

1734

return

1735

logger.debug("Fingerprint: %s", fpr)

1736

1737

try:

1738

client = ProxyClient(child_pipe, fpr,

2316

1739

self.client_address)

2317

1740

except KeyError:

2318

1741

return

2319

1742

2320

1743

if client.approval_delay:

2321

1744

delay = client.approval_delay

2322

1745

client.approvals_pending += 1

2323

1746

approval_required = True

2324

1747

2325

1748

while True:

2326

1749

if not client.enabled:

2327

1750

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

2328

client.name)

1751

client.name)

2329

1752

if self.server.use_dbus:

2330

1753

# Emit D-Bus signal

2331

1754

client.Rejected("Disabled")

2332

1755

return

2333

1756

2334

1757

if client.approved or not client.approval_delay:

2335

# We are approved or approval is disabled

1758

#We are approved or approval is disabled

2336

1759

break

2337

1760

elif client.approved is None:

2338

1761

logger.info("Client %s needs approval",

2349

1772

# Emit D-Bus signal

2350

1773

client.Rejected("Denied")

2351

1774

return

2352

2353

# wait until timeout or approved

1775

1776

#wait until timeout or approved

2354

1777

time = datetime.datetime.now()

2355

1778

client.changedstate.acquire()

2356

1779

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

2369

1792

break

2370

1793

else:

2371

1794

delay -= time2 - time

2372

2373

try:

2374

session.send(client.secret)

2375

except gnutls.Error as error:

2376

logger.warning("gnutls send failed",

2377

exc_info=error)

2378

return

2379

1795

1796

sent_size = 0

1797

while sent_size < len(client.secret):

1798

try:

1799

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

1800

except gnutls.errors.GNUTLSError as error:

1801

logger.warning("gnutls send failed",

1802

exc_info=error)

1803

return

1804

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

1805

sent, len(client.secret)

1806

- (sent_size + sent))

1807

sent_size += sent

1808

2380

1809

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

2381

1810

# bump the timeout using extended_timeout

2382

1811

client.bump_timeout(client.extended_timeout)

2383

1812

if self.server.use_dbus:

2384

1813

# Emit D-Bus signal

2385

1814

client.GotSecret()

2386

1815

2387

1816

finally:

2388

1817

if approval_required:

2389

1818

client.approvals_pending -= 1

2390

1819

try:

2391

1820

session.bye()

2392

except gnutls.Error as error:

1821

except gnutls.errors.GNUTLSError as error:

2393

1822

logger.warning("GnuTLS bye failed",

2394

1823

exc_info=error)

2395

1824

2396

1825

@staticmethod

2397

1826

def peer_certificate(session):

2398

"Return the peer's certificate as a bytestring"

2399

try:

2400

cert_type = gnutls.certificate_type_get2(session._c_object,

2401

gnutls.CTYPE_PEERS)

2402

except AttributeError:

2403

cert_type = gnutls.certificate_type_get(session._c_object)

2404

if gnutls.has_rawpk:

2405

valid_cert_types = frozenset((gnutls.CRT_RAWPK,))

2406

else:

2407

valid_cert_types = frozenset((gnutls.CRT_OPENPGP,))

2408

# If not a valid certificate type...

2409

if cert_type not in valid_cert_types:

2410

logger.info("Cert type %r not in %r", cert_type,

2411

valid_cert_types)

2412

# ...return invalid data

2413

return b""

1827

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

1828

# If not an OpenPGP certificate...

1829

if (gnutls.library.functions

1830

.gnutls_certificate_type_get(session._c_object)

1831

!= gnutls.library.constants.GNUTLS_CRT_OPENPGP):

1832

# ...do the normal thing

1833

return session.peer_certificate

2414

1834

list_size = ctypes.c_uint(1)

2415

cert_list = (gnutls.certificate_get_peers

1835

cert_list = (gnutls.library.functions

1836

.gnutls_certificate_get_peers

2416

1837

(session._c_object, ctypes.byref(list_size)))

2417

1838

if not bool(cert_list) and list_size.value != 0:

2418

raise gnutls.Error("error getting peer certificate")

1839

raise gnutls.errors.GNUTLSError("error getting peer"

1840

" certificate")

2419

1841

if list_size.value == 0:

2420

1842

return None

2421

1843

cert = cert_list[0]

2422

1844

return ctypes.string_at(cert.data, cert.size)

2423

2424

@staticmethod

2425

def key_id(certificate):

2426

"Convert a certificate bytestring to a hexdigit key ID"

2427

# New GnuTLS "datum" with the public key

2428

datum = gnutls.datum_t(

2429

ctypes.cast(ctypes.c_char_p(certificate),

2430

ctypes.POINTER(ctypes.c_ubyte)),

2431

ctypes.c_uint(len(certificate)))

2432

# XXX all these need to be created in the gnutls "module"

2433

# New empty GnuTLS certificate

2434

pubkey = gnutls.pubkey_t()

2435

gnutls.pubkey_init(ctypes.byref(pubkey))

2436

# Import the raw public key into the certificate

2437

gnutls.pubkey_import(pubkey,

2438

ctypes.byref(datum),

2439

gnutls.X509_FMT_DER)

2440

# New buffer for the key ID

2441

buf = ctypes.create_string_buffer(32)

2442

buf_len = ctypes.c_size_t(len(buf))

2443

# Get the key ID from the raw public key into the buffer

2444

gnutls.pubkey_get_key_id(pubkey,

2445

gnutls.KEYID_USE_SHA256,

2446

ctypes.cast(ctypes.byref(buf),

2447

ctypes.POINTER(ctypes.c_ubyte)),

2448

ctypes.byref(buf_len))

2449

# Deinit the certificate

2450

gnutls.pubkey_deinit(pubkey)

2451

2452

# Convert the buffer to a Python bytestring

2453

key_id = ctypes.string_at(buf, buf_len.value)

2454

# Convert the bytestring to hexadecimal notation

2455

hex_key_id = binascii.hexlify(key_id).upper()

2456

return hex_key_id

2457

1845

2458

1846

@staticmethod

2459

1847

def fingerprint(openpgp):

2460

1848

"Convert an OpenPGP bytestring to a hexdigit fingerprint"

2461

1849

# New GnuTLS "datum" with the OpenPGP public key

2462

datum = gnutls.datum_t(

2463

ctypes.cast(ctypes.c_char_p(openpgp),

2464

ctypes.POINTER(ctypes.c_ubyte)),

2465

ctypes.c_uint(len(openpgp)))

1850

datum = (gnutls.library.types

1851

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

1852

ctypes.POINTER

1853

(ctypes.c_ubyte)),

1854

ctypes.c_uint(len(openpgp))))

2466

1855

# New empty GnuTLS certificate

2467

crt = gnutls.openpgp_crt_t()

2468

gnutls.openpgp_crt_init(ctypes.byref(crt))

1856

crt = gnutls.library.types.gnutls_openpgp_crt_t()

1857

(gnutls.library.functions

1858

.gnutls_openpgp_crt_init(ctypes.byref(crt)))

2469

1859

# Import the OpenPGP public key into the certificate

2470

gnutls.openpgp_crt_import(crt, ctypes.byref(datum),

2471

gnutls.OPENPGP_FMT_RAW)

1860

(gnutls.library.functions

1861

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

1862

gnutls.library.constants

1863

.GNUTLS_OPENPGP_FMT_RAW))

2472

1864

# Verify the self signature in the key

2473

1865

crtverify = ctypes.c_uint()

2474

gnutls.openpgp_crt_verify_self(crt, 0,

2475

ctypes.byref(crtverify))

1866

(gnutls.library.functions

1867

.gnutls_openpgp_crt_verify_self(crt, 0,

1868

ctypes.byref(crtverify)))

2476

1869

if crtverify.value != 0:

2477

gnutls.openpgp_crt_deinit(crt)

2478

raise gnutls.CertificateSecurityError(code

2479

=crtverify.value)

1870

gnutls.library.functions.gnutls_openpgp_crt_deinit(crt)

1871

raise (gnutls.errors.CertificateSecurityError

1872

("Verify failed"))

2480

1873

# New buffer for the fingerprint

2481

1874

buf = ctypes.create_string_buffer(20)

2482

1875

buf_len = ctypes.c_size_t()

2483

1876

# Get the fingerprint from the certificate into the buffer

2484

gnutls.openpgp_crt_get_fingerprint(crt, ctypes.byref(buf),

2485

ctypes.byref(buf_len))

1877

(gnutls.library.functions

1878

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

1879

ctypes.byref(buf_len)))

2486

1880

# Deinit the certificate

2487

gnutls.openpgp_crt_deinit(crt)

1881

gnutls.library.functions.gnutls_openpgp_crt_deinit(crt)

2488

1882

# Convert the buffer to a Python bytestring

2489

1883

fpr = ctypes.string_at(buf, buf_len.value)

2490

1884

# Convert the bytestring to hexadecimal notation

2494

1888

2495

1889

class MultiprocessingMixIn(object):

2496

1890

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

2497

2498

1891

def sub_process_main(self, request, address):

2499

1892

try:

2500

1893

self.finish_request(request, address)

2501

1894

except Exception:

2502

1895

self.handle_error(request, address)

2503

1896

self.close_request(request)

2504

1897

2505

1898

def process_request(self, request, address):

2506

1899

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

2507

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

2508

args=(request, address))

1900

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

1901

args = (request, address))

2509

1902

proc.start()

2510

1903

return proc

2511

1904

2512

1905

2513

1906

class MultiprocessingMixInWithPipe(MultiprocessingMixIn, object):

2514

1907

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

2515

2516

1908

def process_request(self, request, client_address):

2517

1909

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

2518

1910

2519

1911

This function creates a new pipe in self.pipe

2520

1912

"""

2521

1913

parent_pipe, self.child_pipe = multiprocessing.Pipe()

2522

1914

2523

1915

proc = MultiprocessingMixIn.process_request(self, request,

2524

1916

client_address)

2525

1917

self.child_pipe.close()

2526

1918

self.add_pipe(parent_pipe, proc)

2527

1919

2528

1920

def add_pipe(self, parent_pipe, proc):

2529

1921

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

2530

1922

raise NotImplementedError()

2533

1925

class IPv6_TCPServer(MultiprocessingMixInWithPipe,

2534

1926

socketserver.TCPServer, object):

2535

1927

"""IPv6-capable TCP server. Accepts 'None' as address and/or port

2536

1928

2537

1929

Attributes:

2538

1930

enabled: Boolean; whether this server is activated yet

2539

1931

interface: None or a network interface name (string)

2540

1932

use_ipv6: Boolean; to use IPv6 or not

2541

1933

"""

2542

2543

1934

def __init__(self, server_address, RequestHandlerClass,

2544

interface=None,

2545

use_ipv6=True,

2546

socketfd=None):

1935

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

2547

1936

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

2548

1937

creating a new one with socket.socket().

2549

1938

"""

2555

1944

self.socketfd = socketfd

2556

1945

# Save the original socket.socket() function

2557

1946

self.socket_socket = socket.socket

2558

2559

1947

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

2560

#

1948

#

2561

1949

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

2562

1950

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

2563

1951

# patching socket.socket.)

2564

#

1952

#

2565

1953

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

2566

1954

@functools.wraps(socket.socket)

2567

1955

def socket_wrapper(*args, **kwargs):

2579

1967

# socket_wrapper(), if socketfd was set.

2580

1968

socketserver.TCPServer.__init__(self, server_address,

2581

1969

RequestHandlerClass)

2582

1970

2583

1971

def server_bind(self):

2584

1972

"""This overrides the normal server_bind() function

2585

1973

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

2586

1974

bind to an address or port if they were not specified."""

2587

global SO_BINDTODEVICE

2588

1975

if self.interface is not None:

2589

1976

if SO_BINDTODEVICE is None:

2590

# Fall back to a hard-coded value which seems to be

2591

# common enough.

2592

logger.warning("SO_BINDTODEVICE not found, trying 25")

2593

SO_BINDTODEVICE = 25

2594

try:

2595

self.socket.setsockopt(

2596

socket.SOL_SOCKET, SO_BINDTODEVICE,

2597

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

2598

except socket.error as error:

2599

if error.errno == errno.EPERM:

2600

logger.error("No permission to bind to"

2601

" interface %s", self.interface)

2602

elif error.errno == errno.ENOPROTOOPT:

2603

logger.error("SO_BINDTODEVICE not available;"

2604

" cannot bind to interface %s",

2605

self.interface)

2606

elif error.errno == errno.ENODEV:

2607

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

2608

" cannot bind", self.interface)

2609

else:

2610

raise

1977

logger.error("SO_BINDTODEVICE does not exist;"

1978

" cannot bind to interface %s",

1979

self.interface)

1980

else:

1981

try:

1982

self.socket.setsockopt(socket.SOL_SOCKET,

1983

SO_BINDTODEVICE,

1984

(self.interface + "\0")

1985

.encode("utf-8"))

1986

except socket.error as error:

1987

if error.errno == errno.EPERM:

1988

logger.error("No permission to bind to"

1989

" interface %s", self.interface)

1990

elif error.errno == errno.ENOPROTOOPT:

1991

logger.error("SO_BINDTODEVICE not available;"

1992

" cannot bind to interface %s",

1993

self.interface)

1994

elif error.errno == errno.ENODEV:

1995

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

1996

" cannot bind", self.interface)

1997

else:

1998

raise

2611

1999

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

2612

2000

if self.server_address[0] or self.server_address[1]:

2613

if self.server_address[1]:

2614

self.allow_reuse_address = True

2615

2001

if not self.server_address[0]:

2616

2002

if self.address_family == socket.AF_INET6:

2617

any_address = "::" # in6addr_any

2003

any_address = "::" # in6addr_any

2618

2004

else:

2619

any_address = "0.0.0.0" # INADDR_ANY

2005

any_address = "0.0.0.0" # INADDR_ANY

2620

2006

self.server_address = (any_address,

2621

2007

self.server_address[1])

2622

2008

elif not self.server_address[1]:

2623

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

2009

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

2010

0)

2624

2011

# if self.interface:

2625

2012

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

2626

2013

# 0, # port

2632

2019

2633

2020

class MandosServer(IPv6_TCPServer):

2634

2021

"""Mandos server.

2635

2022

2636

2023

Attributes:

2637

2024

clients: set of Client objects

2638

2025

gnutls_priority GnuTLS priority string

2639

2026

use_dbus: Boolean; to emit D-Bus signals or not

2640

2641

Assumes a GLib.MainLoop event loop.

2027

2028

Assumes a gobject.MainLoop event loop.

2642

2029

"""

2643

2644

2030

def __init__(self, server_address, RequestHandlerClass,

2645

interface=None,

2646

use_ipv6=True,

2647

clients=None,

2648

gnutls_priority=None,

2649

use_dbus=True,

2650

socketfd=None):

2031

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

2032

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

2651

2033

self.enabled = False

2652

2034

self.clients = clients

2653

2035

if self.clients is None:

2656

2038

self.gnutls_priority = gnutls_priority

2657

2039

IPv6_TCPServer.__init__(self, server_address,

2658

2040

RequestHandlerClass,

2659

interface=interface,

2660

use_ipv6=use_ipv6,

2661

socketfd=socketfd)

2662

2041

interface = interface,

2042

use_ipv6 = use_ipv6,

2043

socketfd = socketfd)

2663

2044

def server_activate(self):

2664

2045

if self.enabled:

2665

2046

return socketserver.TCPServer.server_activate(self)

2666

2047

2667

2048

def enable(self):

2668

2049

self.enabled = True

2669

2050

2670

2051

def add_pipe(self, parent_pipe, proc):

2671

2052

# Call "handle_ipc" for both data and EOF events

2672

GLib.io_add_watch(

2673

parent_pipe.fileno(),

2674

GLib.IO_IN | GLib.IO_HUP,

2675

functools.partial(self.handle_ipc,

2676

parent_pipe=parent_pipe,

2677

proc=proc))

2678

2679

def handle_ipc(self, source, condition,

2680

parent_pipe=None,

2681

proc=None,

2682

client_object=None):

2053

gobject.io_add_watch(parent_pipe.fileno(),

2054

gobject.IO_IN | gobject.IO_HUP,

2055

functools.partial(self.handle_ipc,

2056

parent_pipe =

2057

parent_pipe,

2058

proc = proc))

2059

2060

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

2061

proc = None, client_object=None):

2683

2062

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

2684

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

2063

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

2685

2064

# Wait for other process to exit

2686

2065

proc.join()

2687

2066

return False

2688

2067

2689

2068

# Read a request from the child

2690

2069

request = parent_pipe.recv()

2691

2070

command = request[0]

2692

2071

2693

2072

if command == 'init':

2694

key_id = request[1].decode("ascii")

2695

fpr = request[2].decode("ascii")

2696

address = request[3]

2697

2698

for c in self.clients.values():

2699

if key_id == "E3B0C44298FC1C149AFBF4C8996FB92427AE41E4649B934CA495991B7852B855":

2700

continue

2701

if key_id and c.key_id == key_id:

2702

client = c

2703

break

2704

if fpr and c.fingerprint == fpr:

2073

fpr = request[1]

2074

address = request[2]

2075

2076

for c in self.clients.itervalues():

2077

if c.fingerprint == fpr:

2705

2078

client = c

2706

2079

break

2707

2080

else:

2708

logger.info("Client not found for key ID: %s, address"

2709

": %s", key_id or fpr, address)

2081

logger.info("Client not found for fingerprint: %s, ad"

2082

"dress: %s", fpr, address)

2710

2083

if self.use_dbus:

2711

2084

# Emit D-Bus signal

2712

mandos_dbus_service.ClientNotFound(key_id or fpr,

2085

mandos_dbus_service.ClientNotFound(fpr,

2713

2086

address[0])

2714

2087

parent_pipe.send(False)

2715

2088

return False

2716

2717

GLib.io_add_watch(

2718

parent_pipe.fileno(),

2719

GLib.IO_IN | GLib.IO_HUP,

2720

functools.partial(self.handle_ipc,

2721

parent_pipe=parent_pipe,

2722

proc=proc,

2723

client_object=client))

2089

2090

gobject.io_add_watch(parent_pipe.fileno(),

2091

gobject.IO_IN | gobject.IO_HUP,

2092

functools.partial(self.handle_ipc,

2093

parent_pipe =

2094

parent_pipe,

2095

proc = proc,

2096

client_object =

2097

client))

2724

2098

parent_pipe.send(True)

2725

2099

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

2726

2100

# same fileno

2729

2103

funcname = request[1]

2730

2104

args = request[2]

2731

2105

kwargs = request[3]

2732

2106

2733

2107

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

2734

2108

funcname)(*args,

2735

**kwargs)))

2736

2109

**kwargs)))

2110

2737

2111

if command == 'getattr':

2738

2112

attrname = request[1]

2739

if isinstance(client_object.__getattribute__(attrname),

2740

collections.Callable):

2741

parent_pipe.send(('function', ))

2113

if callable(client_object.__getattribute__(attrname)):

2114

parent_pipe.send(('function',))

2742

2115

else:

2743

parent_pipe.send((

2744

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

2745

2116

parent_pipe.send(('data', client_object

2117

.__getattribute__(attrname)))

2118

2746

2119

if command == 'setattr':

2747

2120

attrname = request[1]

2748

2121

value = request[2]

2749

2122

setattr(client_object, attrname, value)

2750

2123

2751

2124

return True

2752

2125

2753

2126

2754

2127

def rfc3339_duration_to_delta(duration):

2755

2128

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

2756

2129

2757

2130

>>> rfc3339_duration_to_delta("P7D")

2758

2131

datetime.timedelta(7)

2759

2132

>>> rfc3339_duration_to_delta("PT60S")

2769

2142

>>> rfc3339_duration_to_delta("P1DT3M20S")

2770

2143

datetime.timedelta(1, 200)

2771

2144

"""

2772

2145

2773

2146

# Parsing an RFC 3339 duration with regular expressions is not

2774

2147

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

2775

2148

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

2776

2149

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

2777

2150

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

2778

2151

# avoid excessive use of external libraries.

2779

2152

2780

2153

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

2781

Token = collections.namedtuple("Token", (

2782

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

2783

# a "group" containing digits

2784

"value", # datetime.timedelta or None

2785

"followers")) # Tokens valid after this token

2154

Token = collections.namedtuple("Token",

2155

("regexp", # To match token; if

2156

# "value" is not None,

2157

# must have a "group"

2158

# containing digits

2159

"value", # datetime.timedelta or

2160

# None

2161

"followers")) # Tokens valid after

2162

# this token

2786

2163

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

2787

2164

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

2788

2165

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

2789

2166

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

2790

2167

datetime.timedelta(seconds=1),

2791

frozenset((token_end, )))

2168

frozenset((token_end,)))

2792

2169

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

2793

2170

datetime.timedelta(minutes=1),

2794

2171

frozenset((token_second, token_end)))

2810

2187

frozenset((token_month, token_end)))

2811

2188

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

2812

2189

datetime.timedelta(weeks=1),

2813

frozenset((token_end, )))

2190

frozenset((token_end,)))

2814

2191

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

2815

2192

frozenset((token_year, token_month,

2816

2193

token_day, token_time,

2817

2194

token_week)))

2818

# Define starting values:

2819

# Value so far

2820

value = datetime.timedelta()

2195

# Define starting values

2196

value = datetime.timedelta() # Value so far

2821

2197

found_token = None

2822

# Following valid tokens

2823

followers = frozenset((token_duration, ))

2824

# String left to parse

2825

s = duration

2198

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

2199

s = duration # String left to parse

2826

2200

# Loop until end token is found

2827

2201

while found_token is not token_end:

2828

2202

# Search for any currently valid tokens

2844

2218

break

2845

2219

else:

2846

2220

# No currently valid tokens were found

2847

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

2848

.format(duration))

2221

raise ValueError("Invalid RFC 3339 duration")

2849

2222

# End token found

2850

2223

return value

2851

2224

2852

2225

2853

2226

def string_to_delta(interval):

2854

2227

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

2855

2228

2856

2229

>>> string_to_delta('7d')

2857

2230

datetime.timedelta(7)

2858

2231

>>> string_to_delta('60s')

2866

2239

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

2867

2240

datetime.timedelta(0, 330)

2868

2241

"""

2869

2242

2870

2243

try:

2871

2244

return rfc3339_duration_to_delta(interval)

2872

2245

except ValueError:

2873

2246

pass

2874

2247

2875

2248

timevalue = datetime.timedelta(0)

2876

2249

for s in interval.split():

2877

2250

try:

2888

2261

elif suffix == "w":

2889

2262

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

2890

2263

else:

2891

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

2264

raise ValueError("Unknown suffix {!r}"

2265

.format(suffix))

2892

2266

except IndexError as e:

2893

2267

raise ValueError(*(e.args))

2894

2268

timevalue += delta

2895

2269

return timevalue

2896

2270

2897

2271

2898

def daemon(nochdir=False, noclose=False):

2272

def daemon(nochdir = False, noclose = False):

2899

2273

"""See daemon(3). Standard BSD Unix function.

2900

2274

2901

2275

This should really exist as os.daemon, but it doesn't (yet)."""

2902

2276

if os.fork():

2903

2277

sys.exit()

2910

2284

# Close all standard open file descriptors

2911

2285

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

2912

2286

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

2913

raise OSError(errno.ENODEV,

2914

"{} not a character device"

2287

raise OSError(errno.ENODEV, "{} not a character device"

2915

2288

.format(os.devnull))

2916

2289

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

2917

2290

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

2921

2294

2922

2295

2923

2296

def main():

2924

2297

2925

2298

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

2926

2299

# Parsing of options, both command line and config file

2927

2300

2928

2301

parser = argparse.ArgumentParser()

2929

2302

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

2930

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

2303

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

2931

2304

help="show version number and exit")

2932

2305

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

2933

2306

help="Bind to interface IF")

2969

2342

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

2970

2343

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

2971

2344

default=None)

2972

2345

2973

2346

options = parser.parse_args()

2974

2347

2975

2348

if options.check:

2976

2349

import doctest

2977

2350

fail_count, test_count = doctest.testmod()

2978

2351

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

2979

2352

2980

2353

# Default values for config file for server-global settings

2981

if gnutls.has_rawpk:

2982

priority = ("SECURE128:!CTYPE-X.509:+CTYPE-RAWPK:!RSA"

2983

":!VERS-ALL:+VERS-TLS1.3:%PROFILE_ULTRA")

2984

else:

2985

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

2986

":+SIGN-DSA-SHA256")

2987

server_defaults = {"interface": "",

2988

"address": "",

2989

"port": "",

2990

"debug": "False",

2991

"priority": priority,

2992

"servicename": "Mandos",

2993

"use_dbus": "True",

2994

"use_ipv6": "True",

2995

"debuglevel": "",

2996

"restore": "True",

2997

"socket": "",

2998

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

2999

"foreground": "False",

3000

"zeroconf": "True",

3001

}

3002

del priority

3003

2354

server_defaults = { "interface": "",

2355

"address": "",

2356

"port": "",

2357

"debug": "False",

2358

"priority":

2359

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

2360

"servicename": "Mandos",

2361

"use_dbus": "True",

2362

"use_ipv6": "True",

2363

"debuglevel": "",

2364

"restore": "True",

2365

"socket": "",

2366

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

2367

"foreground": "False",

2368

"zeroconf": "True",

2369

}

2370

3004

2371

# Parse config file for server-global settings

3005

server_config = configparser.ConfigParser(server_defaults)

2372

server_config = configparser.SafeConfigParser(server_defaults)

3006

2373

del server_defaults

3007

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

3008

# Convert the ConfigParser object to a dict

2374

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

2375

"mandos.conf"))

2376

# Convert the SafeConfigParser object to a dict

3009

2377

server_settings = server_config.defaults()

3010

2378

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

3011

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

3012

"foreground", "zeroconf"):

2379

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

3013

2380

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

3014

2381

option)

3015

2382

if server_settings["port"]:

3025

2392

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

3026

2393

["socket"])

3027

2394

del server_config

3028

2395

3029

2396

# Override the settings from the config file with command line

3030

2397

# options, if set.

3031

2398

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

3032

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

3033

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

3034

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

2399

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

2400

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

2401

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

3035

2402

value = getattr(options, option)

3036

2403

if value is not None:

3037

2404

server_settings[option] = value

3049

2416

if server_settings["debug"]:

3050

2417

server_settings["foreground"] = True

3051

2418

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

3052

2419

3053

2420

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

3054

3055

if (not server_settings["zeroconf"]

3056

and not (server_settings["port"]

3057

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

3058

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

3059

2421

2422

if (not server_settings["zeroconf"] and

2423

not (server_settings["port"]

2424

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

2425

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

2426

" Zeroconf")

2427

3060

2428

# For convenience

3061

2429

debug = server_settings["debug"]

3062

2430

debuglevel = server_settings["debuglevel"]

3066

2434

stored_state_file)

3067

2435

foreground = server_settings["foreground"]

3068

2436

zeroconf = server_settings["zeroconf"]

3069

2437

3070

2438

if debug:

3071

2439

initlogger(debug, logging.DEBUG)

3072

2440

else:

3075

2443

else:

3076

2444

level = getattr(logging, debuglevel.upper())

3077

2445

initlogger(debug, level)

3078

2446

3079

2447

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

3080

syslogger.setFormatter(

3081

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

3082

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

3083

server_settings["servicename"])))

3084

2448

syslogger.setFormatter(logging.Formatter

2449

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

2450

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

2451

.format(server_settings

2452

["servicename"])))

2453

3085

2454

# Parse config file with clients

3086

client_config = configparser.ConfigParser(Client.client_defaults)

2455

client_config = configparser.SafeConfigParser(Client

2456

.client_defaults)

3087

2457

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

3088

2458

"clients.conf"))

3089

2459

3090

2460

global mandos_dbus_service

3091

2461

mandos_dbus_service = None

3092

2462

3093

2463

socketfd = None

3094

2464

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

3095

2465

socketfd = server_settings["socket"]

3096

tcp_server = MandosServer(

3097

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

3098

ClientHandler,

3099

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

3100

use_ipv6=use_ipv6,

3101

gnutls_priority=server_settings["priority"],

3102

use_dbus=use_dbus,

3103

socketfd=socketfd)

2466

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

2467

server_settings["port"]),

2468

ClientHandler,

2469

interface=(server_settings["interface"]

2470

or None),

2471

use_ipv6=use_ipv6,

2472

gnutls_priority=

2473

server_settings["priority"],

2474

use_dbus=use_dbus,

2475

socketfd=socketfd)

3104

2476

if not foreground:

3105

2477

pidfilename = "/run/mandos.pid"

3106

2478

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

3107

2479

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

3108

2480

pidfile = None

3109

2481

try:

3110

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

2482

pidfile = open(pidfilename, "w")

3111

2483

except IOError as e:

3112

2484

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

3113

2485

exc_info=e)

3114

3115

for name, group in (("_mandos", "_mandos"),

3116

("mandos", "mandos"),

3117

("nobody", "nogroup")):

2486

2487

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

3118

2488

try:

3119

2489

uid = pwd.getpwnam(name).pw_uid

3120

gid = pwd.getpwnam(group).pw_gid

2490

gid = pwd.getpwnam(name).pw_gid

3121

2491

break

3122

2492

except KeyError:

3123

2493

continue

3127

2497

try:

3128

2498

os.setgid(gid)

3129

2499

os.setuid(uid)

3130

if debug:

3131

logger.debug("Did setuid/setgid to {}:{}".format(uid,

3132

gid))

3133

2500

except OSError as error:

3134

logger.warning("Failed to setuid/setgid to {}:{}: {}"

3135

.format(uid, gid, os.strerror(error.errno)))

3136

2501

if error.errno != errno.EPERM:

3137

2502

raise

3138

2503

3139

2504

if debug:

3140

2505

# Enable all possible GnuTLS debugging

3141

2506

3142

2507

# "Use a log level over 10 to enable all debugging options."

3143

2508

# - GnuTLS manual

3144

gnutls.global_set_log_level(11)

3145

3146

@gnutls.log_func

2509

gnutls.library.functions.gnutls_global_set_log_level(11)

2510

2511

@gnutls.library.types.gnutls_log_func

3147

2512

def debug_gnutls(level, string):

3148

2513

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

3149

3150

gnutls.global_set_log_function(debug_gnutls)

3151

2514

2515

(gnutls.library.functions

2516

.gnutls_global_set_log_function(debug_gnutls))

2517

3152

2518

# Redirect stdin so all checkers get /dev/null

3153

2519

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

3154

2520

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

3155

2521

if null > 2:

3156

2522

os.close(null)

3157

2523

3158

2524

# Need to fork before connecting to D-Bus

3159

2525

if not foreground:

3160

2526

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

3161

2527

daemon()

3162

3163

if gi.version_info < (3, 10, 2):

3164

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

3165

# need to inform GLib that threads will be used.

3166

GLib.threads_init()

3167

2528

2529

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

2530

# need to inform gobject that threads will be used.

2531

gobject.threads_init()

2532

3168

2533

global main_loop

3169

2534

# From the Avahi example code

3170

2535

DBusGMainLoop(set_as_default=True)

3171

main_loop = GLib.MainLoop()

2536

main_loop = gobject.MainLoop()

3172

2537

bus = dbus.SystemBus()

3173

2538

# End of Avahi example code

3174

2539

if use_dbus:

3175

2540

try:

3176

2541

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

3177

bus,

3178

do_not_queue=True)

3179

old_bus_name = dbus.service.BusName(

3180

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

3181

do_not_queue=True)

3182

except dbus.exceptions.DBusException as e:

2542

bus, do_not_queue=True)

2543

old_bus_name = (dbus.service.BusName

2544

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

2545

do_not_queue=True))

2546

except dbus.exceptions.NameExistsException as e:

3183

2547

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

3184

2548

use_dbus = False

3185

2549

server_settings["use_dbus"] = False

3186

2550

tcp_server.use_dbus = False

3187

2551

if zeroconf:

3188

2552

protocol = avahi.PROTO_INET6 if use_ipv6 else avahi.PROTO_INET

3189

service = AvahiServiceToSyslog(

3190

name=server_settings["servicename"],

3191

servicetype="_mandos._tcp",

3192

protocol=protocol,

3193

bus=bus)

2553

service = AvahiServiceToSyslog(name =

2554

server_settings["servicename"],

2555

servicetype = "_mandos._tcp",

2556

protocol = protocol, bus = bus)

3194

2557

if server_settings["interface"]:

3195

service.interface = if_nametoindex(

3196

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

3197

2558

service.interface = (if_nametoindex

2559

(server_settings["interface"]

2560

.encode("utf-8")))

2561

3198

2562

global multiprocessing_manager

3199

2563

multiprocessing_manager = multiprocessing.Manager()

3200

2564

3201

2565

client_class = Client

3202

2566

if use_dbus:

3203

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

3204

2567

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

2568

3205

2569

client_settings = Client.config_parser(client_config)

3206

2570

old_client_settings = {}

3207

2571

clients_data = {}

3208

2572

3209

2573

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

3210

2574

global wnull

3211

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

2575

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

3212

2576

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

3213

2577

# mode

3214

2578

if debug or not foreground:

3215

2579

wnull.close()

3216

2580

3217

2581

# Get client data and settings from last running state.

3218

2582

if server_settings["restore"]:

3219

2583

try:

3220

2584

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

3221

if sys.version_info.major == 2:

3222

clients_data, old_client_settings = pickle.load(

3223

stored_state)

3224

else:

3225

bytes_clients_data, bytes_old_client_settings = (

3226

pickle.load(stored_state, encoding="bytes"))

3227

# Fix bytes to strings

3228

# clients_data

3229

# .keys()

3230

clients_data = {(key.decode("utf-8")

3231

if isinstance(key, bytes)

3232

else key): value

3233

for key, value in

3234

bytes_clients_data.items()}

3235

del bytes_clients_data

3236

for key in clients_data:

3237

value = {(k.decode("utf-8")

3238

if isinstance(k, bytes) else k): v

3239

for k, v in

3240

clients_data[key].items()}

3241

clients_data[key] = value

3242

# .client_structure

3243

value["client_structure"] = [

3244

(s.decode("utf-8")

3245

if isinstance(s, bytes)

3246

else s) for s in

3247

value["client_structure"]]

3248

# .name & .host

3249

for k in ("name", "host"):

3250

if isinstance(value[k], bytes):

3251

value[k] = value[k].decode("utf-8")

3252

if "key_id" not in value:

3253

value["key_id"] = ""

3254

elif "fingerprint" not in value:

3255

value["fingerprint"] = ""

3256

# old_client_settings

3257

# .keys()

3258

old_client_settings = {

3259

(key.decode("utf-8")

3260

if isinstance(key, bytes)

3261

else key): value

3262

for key, value in

3263

bytes_old_client_settings.items()}

3264

del bytes_old_client_settings

3265

# .host

3266

for value in old_client_settings.values():

3267

if isinstance(value["host"], bytes):

3268

value["host"] = (value["host"]

3269

.decode("utf-8"))

2585

clients_data, old_client_settings = (pickle.load

2586

(stored_state))

3270

2587

os.remove(stored_state_path)

3271

2588

except IOError as e:

3272

2589

if e.errno == errno.ENOENT:

3273

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

3274

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

2590

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

2591

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

3275

2592

else:

3276

2593

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

3277

2594

exc_info=e)

3278

2595

raise

3279

2596

except EOFError as e:

3280

2597

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

3281

"EOFError:",

3282

exc_info=e)

3283

2598

"EOFError:", exc_info=e)

2599

3284

2600

with PGPEngine() as pgp:

3285

2601

for client_name, client in clients_data.items():

3286

2602

# Skip removed clients

3287

2603

if client_name not in client_settings:

3288

2604

continue

3289

2605

3290

2606

# Decide which value to use after restoring saved state.

3291

2607

# We have three different values: Old config file,

3292

2608

# new config file, and saved state.

3297

2613

# For each value in new config, check if it

3298

2614

# differs from the old config value (Except for

3299

2615

# the "secret" attribute)

3300

if (name != "secret"

3301

and (value !=

3302

old_client_settings[client_name][name])):

2616

if (name != "secret" and

2617

value != old_client_settings[client_name]

2618

[name]):

3303

2619

client[name] = value

3304

2620

except KeyError:

3305

2621

pass

3306

2622

3307

2623

# Clients who has passed its expire date can still be

3308

# enabled if its last checker was successful. A Client

2624

# enabled if its last checker was successful. Clients

3309

2625

# whose checker succeeded before we stored its state is

3310

2626

# assumed to have successfully run all checkers during

3311

2627

# downtime.

3314

2630

if not client["last_checked_ok"]:

3315

2631

logger.warning(

3316

2632

"disabling client {} - Client never "

3317

"performed a successful checker".format(

3318

client_name))

2633

"performed a successful checker"

2634

.format(client_name))

3319

2635

client["enabled"] = False

3320

2636

elif client["last_checker_status"] != 0:

3321

2637

logger.warning(

3322

2638

"disabling client {} - Client last"

3323

" checker failed with error code"

3324

" {}".format(

3325

client_name,

3326

client["last_checker_status"]))

2639

" checker failed with error code {}"

2640

.format(client_name,

2641

client["last_checker_status"]))

3327

2642

client["enabled"] = False

3328

2643

else:

3329

client["expires"] = (

3330

datetime.datetime.utcnow()

3331

+ client["timeout"])

2644

client["expires"] = (datetime.datetime

2645

.utcnow()

2646

+ client["timeout"])

3332

2647

logger.debug("Last checker succeeded,"

3333

" keeping {} enabled".format(

3334

client_name))

2648

" keeping {} enabled"

2649

.format(client_name))

3335

2650

try:

3336

client["secret"] = pgp.decrypt(

3337

client["encrypted_secret"],

3338

client_settings[client_name]["secret"])

2651

client["secret"] = (

2652

pgp.decrypt(client["encrypted_secret"],

2653

client_settings[client_name]

2654

["secret"]))

3339

2655

except PGPError:

3340

2656

# If decryption fails, we use secret from new settings

3341

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

3342

client_name))

3343

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

3344

["secret"])

3345

2657

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

2658

.format(client_name))

2659

client["secret"] = (

2660

client_settings[client_name]["secret"])

2661

3346

2662

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

3347

2663

for client_name in (set(old_client_settings)

3348

2664

- set(client_settings)):

3350

2666

for client_name in (set(client_settings)

3351

2667

- set(old_client_settings)):

3352

2668

clients_data[client_name] = client_settings[client_name]

3353

2669

3354

2670

# Create all client objects

3355

2671

for client_name, client in clients_data.items():

3356

2672

tcp_server.clients[client_name] = client_class(

3357

name=client_name,

3358

settings=client,

3359

server_settings=server_settings)

3360

2673

name = client_name, settings = client,

2674

server_settings = server_settings)

2675

3361

2676

if not tcp_server.clients:

3362

2677

logger.warning("No clients defined")

3363

2678

3364

2679

if not foreground:

3365

2680

if pidfile is not None:

3366

pid = os.getpid()

3367

2681

try:

3368

2682

with pidfile:

3369

print(pid, file=pidfile)

2683

pid = os.getpid()

2684

pidfile.write("{}\n".format(pid).encode("utf-8"))

3370

2685

except IOError:

3371

2686

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

3372

2687

pidfilename, pid)

3373

2688

del pidfile

3374

2689

del pidfilename

3375

3376

for termsig in (signal.SIGHUP, signal.SIGTERM):

3377

GLib.unix_signal_add(GLib.PRIORITY_HIGH, termsig,

3378

lambda: main_loop.quit() and False)

3379

2690

2691

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

2692

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

2693

3380

2694

if use_dbus:

3381

3382

@alternate_dbus_interfaces(

3383

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

3384

class MandosDBusService(DBusObjectWithObjectManager):

2695

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

2696

"se.bsnet.fukt.Mandos"})

2697

class MandosDBusService(DBusObjectWithProperties):

3385

2698

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

3386

3387

2699

def __init__(self):

3388

2700

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

3389

3390

2701

_interface = "se.recompile.Mandos"

3391

2702

2703

@dbus_interface_annotations(_interface)

2704

def _foo(self):

2705

return { "org.freedesktop.DBus.Property"

2706

".EmitsChangedSignal":

2707

"false"}

2708

3392

2709

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

3393

2710

def ClientAdded(self, objpath):

3394

2711

"D-Bus signal"

3395

2712

pass

3396

2713

3397

2714

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

3398

def ClientNotFound(self, key_id, address):

2715

def ClientNotFound(self, fingerprint, address):

3399

2716

"D-Bus signal"

3400

2717

pass

3401

3402

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

3403

"true"})

2718

3404

2719

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

3405

2720

def ClientRemoved(self, objpath, name):

3406

2721

"D-Bus signal"

3407

2722

pass

3408

3409

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

3410

"true"})

2723

3411

2724

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

3412

2725

def GetAllClients(self):

3413

2726

"D-Bus method"

3414

return dbus.Array(c.dbus_object_path for c in

3415

tcp_server.clients.values())

3416

3417

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

3418

"true"})

2727

return dbus.Array(c.dbus_object_path

2728

for c in

2729

tcp_server.clients.itervalues())

2730

3419

2731

@dbus.service.method(_interface,

3420

2732

out_signature="a{oa{sv}}")

3421

2733

def GetAllClientsWithProperties(self):

3422

2734

"D-Bus method"

3423

2735

return dbus.Dictionary(

3424

{c.dbus_object_path: c.GetAll(

3425

"se.recompile.Mandos.Client")

3426

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

2736

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

2737

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

3427

2738

signature="oa{sv}")

3428

2739

3429

2740

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

3430

2741

def RemoveClient(self, object_path):

3431

2742

"D-Bus method"

3432

for c in tcp_server.clients.values():

2743

for c in tcp_server.clients.itervalues():

3433

2744

if c.dbus_object_path == object_path:

3434

2745

del tcp_server.clients[c.name]

3435

2746

c.remove_from_connection()

3436

# Don't signal the disabling

2747

# Don't signal anything except ClientRemoved

3437

2748

c.disable(quiet=True)

3438

# Emit D-Bus signal for removal

3439

self.client_removed_signal(c)

2749

# Emit D-Bus signal

2750

self.ClientRemoved(object_path, c.name)

3440

2751

return

3441

2752

raise KeyError(object_path)

3442

2753

3443

2754

del _interface

3444

3445

@dbus.service.method(dbus.OBJECT_MANAGER_IFACE,

3446

out_signature="a{oa{sa{sv}}}")

3447

def GetManagedObjects(self):

3448

"""D-Bus method"""

3449

return dbus.Dictionary(

3450

{client.dbus_object_path:

3451

dbus.Dictionary(

3452

{interface: client.GetAll(interface)

3453

for interface in

3454

client._get_all_interface_names()})

3455

for client in tcp_server.clients.values()})

3456

3457

def client_added_signal(self, client):

3458

"""Send the new standard signal and the old signal"""

3459

if use_dbus:

3460

# New standard signal

3461

self.InterfacesAdded(

3462

client.dbus_object_path,

3463

dbus.Dictionary(

3464

{interface: client.GetAll(interface)

3465

for interface in

3466

client._get_all_interface_names()}))

3467

# Old signal

3468

self.ClientAdded(client.dbus_object_path)

3469

3470

def client_removed_signal(self, client):

3471

"""Send the new standard signal and the old signal"""

3472

if use_dbus:

3473

# New standard signal

3474

self.InterfacesRemoved(

3475

client.dbus_object_path,

3476

client._get_all_interface_names())

3477

# Old signal

3478

self.ClientRemoved(client.dbus_object_path,

3479

client.name)

3480

2755

3481

2756

mandos_dbus_service = MandosDBusService()

3482

3483

# Save modules to variables to exempt the modules from being

3484

# unloaded before the function registered with atexit() is run.

3485

mp = multiprocessing

3486

wn = wnull

3487

2757

3488

2758

def cleanup():

3489

2759

"Cleanup function; run on exit"

3490

2760

if zeroconf:

3491

2761

service.cleanup()

3492

3493

mp.active_children()

3494

wn.close()

2762

2763

multiprocessing.active_children()

2764

wnull.close()

3495

2765

if not (tcp_server.clients or client_settings):

3496

2766

return

3497

2767

3498

2768

# Store client before exiting. Secrets are encrypted with key

3499

2769

# based on what config file has. If config file is

3500

2770

# removed/edited, old secret will thus be unrecovable.

3501

2771

clients = {}

3502

2772

with PGPEngine() as pgp:

3503

for client in tcp_server.clients.values():

2773

for client in tcp_server.clients.itervalues():

3504

2774

key = client_settings[client.name]["secret"]

3505

2775

client.encrypted_secret = pgp.encrypt(client.secret,

3506

2776

key)

3507

2777

client_dict = {}

3508

2778

3509

2779

# A list of attributes that can not be pickled

3510

2780

# + secret.

3511

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

3512

"checker", "server_settings"}

3513

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

3514

.Object):

2781

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

2782

"checker", "server_settings" }

2783

for name, typ in (inspect.getmembers

2784

(dbus.service.Object)):

3515

2785

exclude.add(name)

3516

2786

3517

2787

client_dict["encrypted_secret"] = (client

3518

2788

.encrypted_secret)

3519

2789

for attr in client.client_structure:

3520

2790

if attr not in exclude:

3521

2791

client_dict[attr] = getattr(client, attr)

3522

2792

3523

2793

clients[client.name] = client_dict

3524

2794

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

3525

2795

3526

2796

try:

3527

with tempfile.NamedTemporaryFile(

3528

mode='wb',

3529

suffix=".pickle",

3530

prefix='clients-',

3531

dir=os.path.dirname(stored_state_path),

3532

delete=False) as stored_state:

3533

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

3534

protocol=2)

3535

tempname = stored_state.name

2797

with (tempfile.NamedTemporaryFile

2798

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

2799

dir=os.path.dirname(stored_state_path),

2800

delete=False)) as stored_state:

2801

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

2802

tempname=stored_state.name

3536

2803

os.rename(tempname, stored_state_path)

3537

2804

except (IOError, OSError) as e:

3538

2805

if not debug:

3547

2814

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

3548

2815

exc_info=e)

3549

2816

raise

3550

2817

3551

2818

# Delete all clients, and settings from config

3552

2819

while tcp_server.clients:

3553

2820

name, client = tcp_server.clients.popitem()

3554

2821

if use_dbus:

3555

2822

client.remove_from_connection()

3556

# Don't signal the disabling

2823

# Don't signal anything except ClientRemoved

3557

2824

client.disable(quiet=True)

3558

# Emit D-Bus signal for removal

3559

2825

if use_dbus:

3560

mandos_dbus_service.client_removed_signal(client)

2826

# Emit D-Bus signal

2827

mandos_dbus_service.ClientRemoved(client

2828

.dbus_object_path,

2829

client.name)

3561

2830

client_settings.clear()

3562

2831

3563

2832

atexit.register(cleanup)

3564

3565

for client in tcp_server.clients.values():

2833

2834

for client in tcp_server.clients.itervalues():

3566

2835

if use_dbus:

3567

# Emit D-Bus signal for adding

3568

mandos_dbus_service.client_added_signal(client)

2836

# Emit D-Bus signal

2837

mandos_dbus_service.ClientAdded(client.dbus_object_path)

3569

2838

# Need to initiate checking of clients

3570

2839

if client.enabled:

3571

2840

client.init_checker()

3572

2841

3573

2842

tcp_server.enable()

3574

2843

tcp_server.server_activate()

3575

2844

3576

2845

# Find out what port we got

3577

2846

if zeroconf:

3578

2847

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

3583

2852

else: # IPv4

3584

2853

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

3585

2854

*tcp_server.socket.getsockname())

3586

3587

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

3588

2855

2856

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

2857

3589

2858

try:

3590

2859

if zeroconf:

3591

2860

# From the Avahi example code

3596

2865

cleanup()

3597

2866

sys.exit(1)

3598

2867

# End of Avahi example code

3599

3600

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

3601

lambda *args, **kwargs:

3602

(tcp_server.handle_request

3603

(*args[2:], **kwargs) or True))

3604

2868

2869

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

2870

lambda *args, **kwargs:

2871

(tcp_server.handle_request

2872

(*args[2:], **kwargs) or True))

2873

3605

2874

logger.debug("Starting main loop")

3606

2875

main_loop.run()

3607

2876

except AvahiError as error:

3616

2885

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

3617

2886

cleanup()

3618

2887

3619

3620

2888

if __name__ == '__main__':

3621

2889

main()