/mandos/trunk : revision 738.1.1

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

if sys.version_info.major == 2:

92

__metaclass__ = type

93

94

# Try to find the value of SO_BINDTODEVICE:

95

83

try:

96

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

97

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

98

84

SO_BINDTODEVICE = socket.SO_BINDTODEVICE

99

85

except AttributeError:

100

86

try:

101

# This is where SO_BINDTODEVICE was up to and including Python

102

# 2.6, and also 3.2:

103

87

from IN import SO_BINDTODEVICE

104

88

except ImportError:

105

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

106

# Try running the C preprocessor:

107

try:

108

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

109

"/dev/stdin"],

110

stdin=subprocess.PIPE,

111

stdout=subprocess.PIPE)

112

stdout = cc.communicate(

113

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

114

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

115

except (OSError, ValueError, IndexError):

116

# No value found

117

SO_BINDTODEVICE = None

89

SO_BINDTODEVICE = None

118

90

119

91

if sys.version_info.major == 2:

120

92

str = unicode

121

93

122

if sys.version_info < (3, 2):

123

configparser.Configparser = configparser.SafeConfigParser

124

125

version = "1.8.7"

94

version = "1.6.9"

126

95

stored_state_file = "clients.pickle"

127

96

128

97

logger = logging.getLogger()

129

98

syslogger = None

130

99

131

100

try:

132

if_nametoindex = ctypes.cdll.LoadLibrary(

133

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

101

if_nametoindex = (ctypes.cdll.LoadLibrary

102

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

103

.if_nametoindex)

134

104

except (OSError, AttributeError):

135

136

105

def if_nametoindex(interface):

137

106

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

138

107

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

143

112

return interface_index

144

113

145

114

146

def copy_function(func):

147

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

148

if sys.version_info.major == 2:

149

return types.FunctionType(func.func_code,

150

func.func_globals,

151

func.func_name,

152

func.func_defaults,

153

func.func_closure)

154

else:

155

return types.FunctionType(func.__code__,

156

func.__globals__,

157

func.__name__,

158

func.__defaults__,

159

func.__closure__)

160

161

162

115

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

163

116

"""init logger and add loglevel"""

164

117

165

118

global syslogger

166

syslogger = (logging.handlers.SysLogHandler(

167

facility=logging.handlers.SysLogHandler.LOG_DAEMON,

168

address="/dev/log"))

119

syslogger = (logging.handlers.SysLogHandler

120

(facility =

121

logging.handlers.SysLogHandler.LOG_DAEMON,

122

address = "/dev/log"))

169

123

syslogger.setFormatter(logging.Formatter

170

124

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

171

125

' %(message)s'))

172

126

logger.addHandler(syslogger)

173

127

174

128

if debug:

175

129

console = logging.StreamHandler()

176

130

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

186

140

pass

187

141

188

142

189

class PGPEngine:

143

class PGPEngine(object):

190

144

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

191

192

145

def __init__(self):

193

146

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

194

self.gpg = "gpg"

195

try:

196

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

197

for line in output.splitlines():

198

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

199

if name == "gpg":

200

self.gpg = path

201

break

202

except OSError as e:

203

if e.errno != errno.ENOENT:

204

raise

205

147

self.gnupgargs = ['--batch',

206

'--homedir', self.tempdir,

148

'--home', self.tempdir,

207

149

'--force-mdc',

208

'--quiet']

209

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

210

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

211

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

212

150

'--quiet',

151

'--no-use-agent']

152

213

153

def __enter__(self):

214

154

return self

215

155

216

156

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

217

157

self._cleanup()

218

158

return False

219

159

220

160

def __del__(self):

221

161

self._cleanup()

222

162

223

163

def _cleanup(self):

224

164

if self.tempdir is not None:

225

165

# Delete contents of tempdir

226

166

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

227

topdown=False):

167

topdown = False):

228

168

for filename in files:

229

169

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

230

170

for dirname in dirs:

232

172

# Remove tempdir

233

173

os.rmdir(self.tempdir)

234

174

self.tempdir = None

235

175

236

176

def password_encode(self, password):

237

177

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

238

178

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

243

183

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

244

184

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

245

185

return encoded

246

186

247

187

def encrypt(self, data, password):

248

188

passphrase = self.password_encode(password)

249

with tempfile.NamedTemporaryFile(

250

dir=self.tempdir) as passfile:

189

with tempfile.NamedTemporaryFile(dir=self.tempdir

190

) as passfile:

251

191

passfile.write(passphrase)

252

192

passfile.flush()

253

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

193

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

254

194

'--passphrase-file',

255

195

passfile.name]

256

196

+ self.gnupgargs,

257

stdin=subprocess.PIPE,

258

stdout=subprocess.PIPE,

259

stderr=subprocess.PIPE)

260

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)

261

201

if proc.returncode != 0:

262

202

raise PGPError(err)

263

203

return ciphertext

264

204

265

205

def decrypt(self, data, password):

266

206

passphrase = self.password_encode(password)

267

with tempfile.NamedTemporaryFile(

268

dir=self.tempdir) as passfile:

207

with tempfile.NamedTemporaryFile(dir = self.tempdir

208

) as passfile:

269

209

passfile.write(passphrase)

270

210

passfile.flush()

271

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

211

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

272

212

'--passphrase-file',

273

213

passfile.name]

274

214

+ self.gnupgargs,

275

stdin=subprocess.PIPE,

276

stdout=subprocess.PIPE,

277

stderr=subprocess.PIPE)

278

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)

279

220

if proc.returncode != 0:

280

221

raise PGPError(err)

281

222

return decrypted_plaintext

282

223

283

224

284

# Pretend that we have an Avahi module

285

class avahi:

286

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

287

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

288

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

289

PROTO_INET = 0 # avahi-common/address.h

290

PROTO_INET6 = 1 # avahi-common/address.h

291

DBUS_NAME = "org.freedesktop.Avahi"

292

DBUS_INTERFACE_ENTRY_GROUP = DBUS_NAME + ".EntryGroup"

293

DBUS_INTERFACE_SERVER = DBUS_NAME + ".Server"

294

DBUS_PATH_SERVER = "/"

295

296

@staticmethod

297

def string_array_to_txt_array(t):

298

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

299

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

300

ENTRY_GROUP_ESTABLISHED = 2 # avahi-common/defs.h

301

ENTRY_GROUP_COLLISION = 3 # avahi-common/defs.h

302

ENTRY_GROUP_FAILURE = 4 # avahi-common/defs.h

303

SERVER_INVALID = 0 # avahi-common/defs.h

304

SERVER_REGISTERING = 1 # avahi-common/defs.h

305

SERVER_RUNNING = 2 # avahi-common/defs.h

306

SERVER_COLLISION = 3 # avahi-common/defs.h

307

SERVER_FAILURE = 4 # avahi-common/defs.h

308

309

310

225

class AvahiError(Exception):

311

226

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

312

227

self.value = value

313

228

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

314

229

**kwargs)

315

230

316

317

231

class AvahiServiceError(AvahiError):

318

232

pass

319

233

320

321

234

class AvahiGroupError(AvahiError):

322

235

pass

323

236

324

237

325

class AvahiService:

238

class AvahiService(object):

326

239

"""An Avahi (Zeroconf) service.

327

240

328

241

Attributes:

329

242

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

330

243

Used to optionally bind to the specified interface.

342

255

server: D-Bus Server

343

256

bus: dbus.SystemBus()

344

257

"""

345

346

def __init__(self,

347

interface=avahi.IF_UNSPEC,

348

name=None,

349

servicetype=None,

350

port=None,

351

TXT=None,

352

domain="",

353

host="",

354

max_renames=32768,

355

protocol=avahi.PROTO_UNSPEC,

356

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):

357

263

self.interface = interface

358

264

self.name = name

359

265

self.type = servicetype

368

274

self.server = None

369

275

self.bus = bus

370

276

self.entry_group_state_changed_match = None

371

277

372

278

def rename(self, remove=True):

373

279

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

374

280

if self.rename_count >= self.max_renames:

376

282

" after %i retries, exiting.",

377

283

self.rename_count)

378

284

raise AvahiServiceError("Too many renames")

379

self.name = str(

380

self.server.GetAlternativeServiceName(self.name))

285

self.name = str(self.server

286

.GetAlternativeServiceName(self.name))

381

287

self.rename_count += 1

382

288

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

383

289

self.name)

394

300

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

395

301

self.cleanup()

396

302

os._exit(1)

397

303

398

304

def remove(self):

399

305

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

400

306

if self.entry_group_state_changed_match is not None:

402

308

self.entry_group_state_changed_match = None

403

309

if self.group is not None:

404

310

self.group.Reset()

405

311

406

312

def add(self):

407

313

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

408

314

self.remove()

425

331

dbus.UInt16(self.port),

426

332

avahi.string_array_to_txt_array(self.TXT))

427

333

self.group.Commit()

428

334

429

335

def entry_group_state_changed(self, state, error):

430

336

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

431

337

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

432

338

433

339

if state == avahi.ENTRY_GROUP_ESTABLISHED:

434

340

logger.debug("Zeroconf service established.")

435

341

elif state == avahi.ENTRY_GROUP_COLLISION:

438

344

elif state == avahi.ENTRY_GROUP_FAILURE:

439

345

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

440

346

str(error))

441

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

442

347

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

348

.format(error))

349

443

350

def cleanup(self):

444

351

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

445

352

if self.group is not None:

450

357

pass

451

358

self.group = None

452

359

self.remove()

453

360

454

361

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

455

362

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

456

363

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

457

bad_states = {

458

avahi.SERVER_INVALID: "Zeroconf server invalid",

459

avahi.SERVER_REGISTERING: None,

460

avahi.SERVER_COLLISION: "Zeroconf server name collision",

461

avahi.SERVER_FAILURE: "Zeroconf server failure",

462

}

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" }

463

371

if state in bad_states:

464

372

if bad_states[state] is not None:

465

373

if error is None:

468

376

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

469

377

self.cleanup()

470

378

elif state == avahi.SERVER_RUNNING:

471

try:

472

self.add()

473

except dbus.exceptions.DBusException as error:

474

if (error.get_dbus_name()

475

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

476

logger.info("Local Zeroconf service name"

477

" collision.")

478

return self.rename(remove=False)

479

else:

480

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

481

self.cleanup()

482

os._exit(1)

379

self.add()

483

380

else:

484

381

if error is None:

485

382

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

486

383

else:

487

384

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

488

385

489

386

def activate(self):

490

387

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

491

388

if self.server is None:

495

392

follow_name_owner_changes=True),

496

393

avahi.DBUS_INTERFACE_SERVER)

497

394

self.server.connect_to_signal("StateChanged",

498

self.server_state_changed)

395

self.server_state_changed)

499

396

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

500

397

501

398

502

399

class AvahiServiceToSyslog(AvahiService):

503

400

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

504

401

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

505

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

506

syslogger.setFormatter(logging.Formatter(

507

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

508

.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)))

509

407

return ret

510

408

511

409

512

# Pretend that we have a GnuTLS module

513

class gnutls:

514

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

515

516

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

517

if library is None:

518

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

519

_library = ctypes.cdll.LoadLibrary(library)

520

del library

521

522

# Unless otherwise indicated, the constants and types below are

523

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

524

525

# Constants

526

E_SUCCESS = 0

527

E_INTERRUPTED = -52

528

E_AGAIN = -28

529

CRT_OPENPGP = 2

530

CRT_RAWPK = 3

531

CLIENT = 2

532

SHUT_RDWR = 0

533

CRD_CERTIFICATE = 1

534

E_NO_CERTIFICATE_FOUND = -49

535

X509_FMT_DER = 0

536

NO_TICKETS = 1<<10

537

ENABLE_RAWPK = 1<<18

538

CTYPE_PEERS = 3

539

KEYID_USE_SHA256 = 1 # gnutls/x509.h

540

OPENPGP_FMT_RAW = 0 # gnutls/openpgp.h

541

542

# Types

543

class session_int(ctypes.Structure):

544

_fields_ = []

545

session_t = ctypes.POINTER(session_int)

546

547

class certificate_credentials_st(ctypes.Structure):

548

_fields_ = []

549

certificate_credentials_t = ctypes.POINTER(

550

certificate_credentials_st)

551

certificate_type_t = ctypes.c_int

552

553

class datum_t(ctypes.Structure):

554

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

555

('size', ctypes.c_uint)]

556

557

class openpgp_crt_int(ctypes.Structure):

558

_fields_ = []

559

openpgp_crt_t = ctypes.POINTER(openpgp_crt_int)

560

openpgp_crt_fmt_t = ctypes.c_int # gnutls/openpgp.h

561

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

562

credentials_type_t = ctypes.c_int

563

transport_ptr_t = ctypes.c_void_p

564

close_request_t = ctypes.c_int

565

566

# Exceptions

567

class Error(Exception):

568

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

569

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

570

# code is passed, convert it to a string with

571

# gnutls.strerror()

572

self.code = code

573

if message is None and code is not None:

574

message = gnutls.strerror(code)

575

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

576

message, *args)

577

578

class CertificateSecurityError(Error):

579

pass

580

581

# Classes

582

class Credentials:

583

def __init__(self):

584

self._c_object = gnutls.certificate_credentials_t()

585

gnutls.certificate_allocate_credentials(

586

ctypes.byref(self._c_object))

587

self.type = gnutls.CRD_CERTIFICATE

588

589

def __del__(self):

590

gnutls.certificate_free_credentials(self._c_object)

591

592

class ClientSession:

593

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

594

self._c_object = gnutls.session_t()

595

gnutls_flags = gnutls.CLIENT

596

if gnutls.check_version(b"3.5.6"):

597

gnutls_flags |= gnutls.NO_TICKETS

598

if gnutls.has_rawpk:

599

gnutls_flags |= gnutls.ENABLE_RAWPK

600

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

601

del gnutls_flags

602

gnutls.set_default_priority(self._c_object)

603

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

604

gnutls.handshake_set_private_extensions(self._c_object,

605

True)

606

self.socket = socket

607

if credentials is None:

608

credentials = gnutls.Credentials()

609

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

610

ctypes.cast(credentials._c_object,

611

ctypes.c_void_p))

612

self.credentials = credentials

613

614

def __del__(self):

615

gnutls.deinit(self._c_object)

616

617

def handshake(self):

618

return gnutls.handshake(self._c_object)

619

620

def send(self, data):

621

data = bytes(data)

622

data_len = len(data)

623

while data_len > 0:

624

data_len -= gnutls.record_send(self._c_object,

625

data[-data_len:],

626

data_len)

627

628

def bye(self):

629

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

630

631

# Error handling functions

632

def _error_code(result):

633

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

634

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

635

if result >= 0:

636

return result

637

if result == gnutls.E_NO_CERTIFICATE_FOUND:

638

raise gnutls.CertificateSecurityError(code=result)

639

raise gnutls.Error(code=result)

640

641

def _retry_on_error(result, func, arguments):

642

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

643

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

644

while result < 0:

645

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

646

return _error_code(result)

647

result = func(*arguments)

648

return result

649

650

# Unless otherwise indicated, the function declarations below are

651

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

652

653

# Functions

654

priority_set_direct = _library.gnutls_priority_set_direct

655

priority_set_direct.argtypes = [session_t, ctypes.c_char_p,

656

ctypes.POINTER(ctypes.c_char_p)]

657

priority_set_direct.restype = _error_code

658

659

init = _library.gnutls_init

660

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

661

init.restype = _error_code

662

663

set_default_priority = _library.gnutls_set_default_priority

664

set_default_priority.argtypes = [session_t]

665

set_default_priority.restype = _error_code

666

667

record_send = _library.gnutls_record_send

668

record_send.argtypes = [session_t, ctypes.c_void_p,

669

ctypes.c_size_t]

670

record_send.restype = ctypes.c_ssize_t

671

record_send.errcheck = _retry_on_error

672

673

certificate_allocate_credentials = (

674

_library.gnutls_certificate_allocate_credentials)

675

certificate_allocate_credentials.argtypes = [

676

ctypes.POINTER(certificate_credentials_t)]

677

certificate_allocate_credentials.restype = _error_code

678

679

certificate_free_credentials = (

680

_library.gnutls_certificate_free_credentials)

681

certificate_free_credentials.argtypes = [

682

certificate_credentials_t]

683

certificate_free_credentials.restype = None

684

685

handshake_set_private_extensions = (

686

_library.gnutls_handshake_set_private_extensions)

687

handshake_set_private_extensions.argtypes = [session_t,

688

ctypes.c_int]

689

handshake_set_private_extensions.restype = None

690

691

credentials_set = _library.gnutls_credentials_set

692

credentials_set.argtypes = [session_t, credentials_type_t,

693

ctypes.c_void_p]

694

credentials_set.restype = _error_code

695

696

strerror = _library.gnutls_strerror

697

strerror.argtypes = [ctypes.c_int]

698

strerror.restype = ctypes.c_char_p

699

700

certificate_type_get = _library.gnutls_certificate_type_get

701

certificate_type_get.argtypes = [session_t]

702

certificate_type_get.restype = _error_code

703

704

certificate_get_peers = _library.gnutls_certificate_get_peers

705

certificate_get_peers.argtypes = [session_t,

706

ctypes.POINTER(ctypes.c_uint)]

707

certificate_get_peers.restype = ctypes.POINTER(datum_t)

708

709

global_set_log_level = _library.gnutls_global_set_log_level

710

global_set_log_level.argtypes = [ctypes.c_int]

711

global_set_log_level.restype = None

712

713

global_set_log_function = _library.gnutls_global_set_log_function

714

global_set_log_function.argtypes = [log_func]

715

global_set_log_function.restype = None

716

717

deinit = _library.gnutls_deinit

718

deinit.argtypes = [session_t]

719

deinit.restype = None

720

721

handshake = _library.gnutls_handshake

722

handshake.argtypes = [session_t]

723

handshake.restype = _error_code

724

handshake.errcheck = _retry_on_error

725

726

transport_set_ptr = _library.gnutls_transport_set_ptr

727

transport_set_ptr.argtypes = [session_t, transport_ptr_t]

728

transport_set_ptr.restype = None

729

730

bye = _library.gnutls_bye

731

bye.argtypes = [session_t, close_request_t]

732

bye.restype = _error_code

733

bye.errcheck = _retry_on_error

734

735

check_version = _library.gnutls_check_version

736

check_version.argtypes = [ctypes.c_char_p]

737

check_version.restype = ctypes.c_char_p

738

739

_need_version = b"3.3.0"

740

if check_version(_need_version) is None:

741

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

742

.format(_need_version))

743

744

_tls_rawpk_version = b"3.6.6"

745

has_rawpk = bool(check_version(_tls_rawpk_version))

746

747

if has_rawpk:

748

# Types

749

class pubkey_st(ctypes.Structure):

750

_fields = []

751

pubkey_t = ctypes.POINTER(pubkey_st)

752

753

x509_crt_fmt_t = ctypes.c_int

754

755

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

756

pubkey_init = _library.gnutls_pubkey_init

757

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

758

pubkey_init.restype = _error_code

759

760

pubkey_import = _library.gnutls_pubkey_import

761

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

762

x509_crt_fmt_t]

763

pubkey_import.restype = _error_code

764

765

pubkey_get_key_id = _library.gnutls_pubkey_get_key_id

766

pubkey_get_key_id.argtypes = [pubkey_t, ctypes.c_int,

767

ctypes.POINTER(ctypes.c_ubyte),

768

ctypes.POINTER(ctypes.c_size_t)]

769

pubkey_get_key_id.restype = _error_code

770

771

pubkey_deinit = _library.gnutls_pubkey_deinit

772

pubkey_deinit.argtypes = [pubkey_t]

773

pubkey_deinit.restype = None

774

else:

775

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

776

777

openpgp_crt_init = _library.gnutls_openpgp_crt_init

778

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

779

openpgp_crt_init.restype = _error_code

780

781

openpgp_crt_import = _library.gnutls_openpgp_crt_import

782

openpgp_crt_import.argtypes = [openpgp_crt_t,

783

ctypes.POINTER(datum_t),

784

openpgp_crt_fmt_t]

785

openpgp_crt_import.restype = _error_code

786

787

openpgp_crt_verify_self = _library.gnutls_openpgp_crt_verify_self

788

openpgp_crt_verify_self.argtypes = [openpgp_crt_t, ctypes.c_uint,

789

ctypes.POINTER(ctypes.c_uint)]

790

openpgp_crt_verify_self.restype = _error_code

791

792

openpgp_crt_deinit = _library.gnutls_openpgp_crt_deinit

793

openpgp_crt_deinit.argtypes = [openpgp_crt_t]

794

openpgp_crt_deinit.restype = None

795

796

openpgp_crt_get_fingerprint = (

797

_library.gnutls_openpgp_crt_get_fingerprint)

798

openpgp_crt_get_fingerprint.argtypes = [openpgp_crt_t,

799

ctypes.c_void_p,

800

ctypes.POINTER(

801

ctypes.c_size_t)]

802

openpgp_crt_get_fingerprint.restype = _error_code

803

804

if check_version(b"3.6.4"):

805

certificate_type_get2 = _library.gnutls_certificate_type_get2

806

certificate_type_get2.argtypes = [session_t, ctypes.c_int]

807

certificate_type_get2.restype = _error_code

808

809

# Remove non-public functions

810

del _error_code, _retry_on_error

811

812

813

def call_pipe(connection, # : multiprocessing.Connection

814

func, *args, **kwargs):

815

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

816

817

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

818

return value on the provided multiprocessing.Connection.

819

"""

820

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

821

connection.close()

822

823

824

class Client:

410

class Client(object):

825

411

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

826

412

827

413

Attributes:

828

414

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

829

415

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

830

416

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

831

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

832

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

833

running.

834

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

835

421

checker_command: string; External command which is run to check

836

422

if client lives. %() expansions are done at

837

423

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

838

424

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

839

checker_initiator_tag: a GLib event source tag, or None

425

checker_initiator_tag: a gobject event source tag, or None

840

426

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

841

427

client_structure: Object describing what attributes a client has

842

428

and is used for storing the client at exit

843

429

current_checker_command: string; current running checker_command

844

disable_initiator_tag: a GLib event source tag, or None

430

disable_initiator_tag: a gobject event source tag, or None

845

431

enabled: bool()

846

432

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

847

uniquely identify an OpenPGP client

848

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

849

a client using raw public keys

433

uniquely identify the client

850

434

host: string; available for use by the checker command

851

435

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

852

436

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

854

438

last_checker_status: integer between 0 and 255 reflecting exit

855

439

status of last checker. -1 reflects crashed

856

440

checker, -2 means no checker completed yet.

857

last_checker_signal: The signal which killed the last checker, if

858

last_checker_status is -1

859

441

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

860

442

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

861

443

D-Bus identifiers

868

450

disabled, or None

869

451

server_settings: The server_settings dict from main()

870

452

"""

871

453

872

454

runtime_expansions = ("approval_delay", "approval_duration",

873

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

455

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

874

456

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

875

457

"last_approval_request", "last_checked_ok",

876

458

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

877

client_defaults = {

878

"timeout": "PT5M",

879

"extended_timeout": "PT15M",

880

"interval": "PT2M",

881

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

882

"host": "",

883

"approval_delay": "PT0S",

884

"approval_duration": "PT1S",

885

"approved_by_default": "True",

886

"enabled": "True",

887

}

888

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

889

470

@staticmethod

890

471

def config_parser(config):

891

472

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

898

479

for client_name in config.sections():

899

480

section = dict(config.items(client_name))

900

481

client = settings[client_name] = {}

901

482

902

483

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

903

484

# Reformat values from string types to Python types

904

485

client["approved_by_default"] = config.getboolean(

905

486

client_name, "approved_by_default")

906

487

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

907

488

"enabled")

908

909

# Uppercase and remove spaces from key_id and fingerprint

910

# for later comparison purposes with return value from the

911

# key_id() and fingerprint() functions

912

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

913

.replace(" ", ""))

489

914

490

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

915

491

.replace(" ", ""))

916

492

if "secret" in section:

917

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

918

.encode("utf-8"),

919

"base64")

493

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

920

494

elif "secfile" in section:

921

495

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

922

496

(section["secfile"])),

937

511

client["last_approval_request"] = None

938

512

client["last_checked_ok"] = None

939

513

client["last_checker_status"] = -2

940

514

941

515

return settings

942

943

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

516

517

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

944

518

self.name = name

945

519

if server_settings is None:

946

520

server_settings = {}

948

522

# adding all client settings

949

523

for setting, value in settings.items():

950

524

setattr(self, setting, value)

951

525

952

526

if self.enabled:

953

527

if not hasattr(self, "last_enabled"):

954

528

self.last_enabled = datetime.datetime.utcnow()

958

532

else:

959

533

self.last_enabled = None

960

534

self.expires = None

961

535

962

536

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

963

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

964

540

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

965

541

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

966

542

datetime.datetime.utcnow())

967

543

968

544

# attributes specific for this server instance

969

545

self.checker = None

970

546

self.checker_initiator_tag = None

973

549

self.current_checker_command = None

974

550

self.approved = None

975

551

self.approvals_pending = 0

976

self.changedstate = multiprocessing_manager.Condition(

977

multiprocessing_manager.Lock())

978

self.client_structure = [attr

979

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()

980

557

if not attr.startswith("_")]

981

558

self.client_structure.append("client_structure")

982

983

for name, t in inspect.getmembers(

984

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)):

985

564

if not name.startswith("_"):

986

565

self.client_structure.append(name)

987

566

988

567

# Send notice to process children that client state has changed

989

568

def send_changedstate(self):

990

569

with self.changedstate:

991

570

self.changedstate.notify_all()

992

571

993

572

def enable(self):

994

573

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

995

574

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

1000

579

self.last_enabled = datetime.datetime.utcnow()

1001

580

self.init_checker()

1002

581

self.send_changedstate()

1003

582

1004

583

def disable(self, quiet=True):

1005

584

"""Disable this client."""

1006

585

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

1008

587

if not quiet:

1009

588

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

1010

589

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

1011

GLib.source_remove(self.disable_initiator_tag)

590

gobject.source_remove(self.disable_initiator_tag)

1012

591

self.disable_initiator_tag = None

1013

592

self.expires = None

1014

593

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

1015

GLib.source_remove(self.checker_initiator_tag)

594

gobject.source_remove(self.checker_initiator_tag)

1016

595

self.checker_initiator_tag = None

1017

596

self.stop_checker()

1018

597

self.enabled = False

1019

598

if not quiet:

1020

599

self.send_changedstate()

1021

# 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

1022

601

return False

1023

602

1024

603

def __del__(self):

1025

604

self.disable()

1026

605

1027

606

def init_checker(self):

1028

607

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

1029

608

# and every interval from then on.

1030

609

if self.checker_initiator_tag is not None:

1031

GLib.source_remove(self.checker_initiator_tag)

1032

self.checker_initiator_tag = GLib.timeout_add(

1033

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

1034

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))

1035

615

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

1036

616

if self.disable_initiator_tag is not None:

1037

GLib.source_remove(self.disable_initiator_tag)

1038

self.disable_initiator_tag = GLib.timeout_add(

1039

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))

1040

622

# Also start a new checker *right now*.

1041

623

self.start_checker()

1042

1043

def checker_callback(self, source, condition, connection,

1044

command):

624

625

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

1045

626

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

1046

# Read return code from connection (see call_pipe)

1047

returncode = connection.recv()

1048

connection.close()

1049

self.checker.join()

1050

627

self.checker_callback_tag = None

1051

628

self.checker = None

1052

1053

if returncode >= 0:

1054

self.last_checker_status = returncode

1055

self.last_checker_signal = None

629

if os.WIFEXITED(condition):

630

self.last_checker_status = os.WEXITSTATUS(condition)

1056

631

if self.last_checker_status == 0:

1057

632

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

1058

633

vars(self))

1059

634

self.checked_ok()

1060

635

else:

1061

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

636

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

637

vars(self))

1062

638

else:

1063

639

self.last_checker_status = -1

1064

self.last_checker_signal = -returncode

1065

640

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

1066

641

vars(self))

1067

return False

1068

642

1069

643

def checked_ok(self):

1070

644

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

1071

645

self.last_checked_ok = datetime.datetime.utcnow()

1072

646

self.last_checker_status = 0

1073

self.last_checker_signal = None

1074

647

self.bump_timeout()

1075

648

1076

649

def bump_timeout(self, timeout=None):

1077

650

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

1078

651

if timeout is None:

1079

652

timeout = self.timeout

1080

653

if self.disable_initiator_tag is not None:

1081

GLib.source_remove(self.disable_initiator_tag)

654

gobject.source_remove(self.disable_initiator_tag)

1082

655

self.disable_initiator_tag = None

1083

656

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

1084

self.disable_initiator_tag = GLib.timeout_add(

1085

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

657

self.disable_initiator_tag = (gobject.timeout_add

658

(int(timeout.total_seconds()

659

* 1000), self.disable))

1086

660

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

1087

661

1088

662

def need_approval(self):

1089

663

self.last_approval_request = datetime.datetime.utcnow()

1090

664

1091

665

def start_checker(self):

1092

666

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

1093

667

1094

668

If a checker already exists, leave it running and do

1095

669

nothing."""

1096

670

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

1101

675

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

1102

676

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

1103

677

# should be.

1104

1105

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

1106

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

1107

self.checker.join()

1108

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)

1109

693

# Start a new checker if needed

1110

694

if self.checker is None:

1111

695

# Escape attributes for the shell

1112

escaped_attrs = {

1113

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

1114

for attr in self.runtime_expansions}

696

escaped_attrs = { attr:

697

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

698

for attr in self.runtime_expansions }

1115

699

try:

1116

700

command = self.checker_command % escaped_attrs

1117

701

except TypeError as error:

1118

702

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

1119

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",

1120

727

exc_info=error)

1121

return True # Try again later

1122

self.current_checker_command = command

1123

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

1124

self.name)

1125

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

1126

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

1127

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

1128

# always replaced by /dev/null.)

1129

# The exception is when not debugging but nevertheless

1130

# running in the foreground; use the previously

1131

# created wnull.

1132

popen_args = {"close_fds": True,

1133

"shell": True,

1134

"cwd": "/"}

1135

if (not self.server_settings["debug"]

1136

and self.server_settings["foreground"]):

1137

popen_args.update({"stdout": wnull,

1138

"stderr": wnull})

1139

pipe = multiprocessing.Pipe(duplex=False)

1140

self.checker = multiprocessing.Process(

1141

target=call_pipe,

1142

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

1143

kwargs=popen_args)

1144

self.checker.start()

1145

self.checker_callback_tag = GLib.io_add_watch(

1146

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

1147

self.checker_callback, pipe[0], command)

1148

# 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

1149

748

return True

1150

749

1151

750

def stop_checker(self):

1152

751

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

1153

752

if self.checker_callback_tag:

1154

GLib.source_remove(self.checker_callback_tag)

753

gobject.source_remove(self.checker_callback_tag)

1155

754

self.checker_callback_tag = None

1156

755

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

1157

756

return

1158

757

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

1159

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

1160

766

self.checker = None

1161

767

1162

768

1163

def dbus_service_property(dbus_interface,

1164

signature="v",

1165

access="readwrite",

1166

byte_arrays=False):

769

def dbus_service_property(dbus_interface, signature="v",

770

access="readwrite", byte_arrays=False):

1167

771

"""Decorators for marking methods of a DBusObjectWithProperties to

1168

772

become properties on the D-Bus.

1169

773

1170

774

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

1171

775

and with one argument by "Set".

1172

776

1173

777

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

1174

778

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

1175

779

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

1179

783

if byte_arrays and signature != "ay":

1180

784

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

1181

785

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

1182

1183

786

def decorator(func):

1184

787

func._dbus_is_property = True

1185

788

func._dbus_interface = dbus_interface

1188

791

func._dbus_name = func.__name__

1189

792

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

1190

793

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

1191

func._dbus_get_args_options = {'byte_arrays': byte_arrays}

794

func._dbus_get_args_options = {'byte_arrays': byte_arrays }

1192

795

return func

1193

1194

796

return decorator

1195

797

1196

798

1197

799

def dbus_interface_annotations(dbus_interface):

1198

800

"""Decorator for marking functions returning interface annotations

1199

801

1200

802

Usage:

1201

803

1202

804

@dbus_interface_annotations("org.example.Interface")

1203

805

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

1204

806

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

1205

807

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

1206

808

"false"}

1207

809

"""

1208

1209

810

def decorator(func):

1210

811

func._dbus_is_interface = True

1211

812

func._dbus_interface = dbus_interface

1212

813

func._dbus_name = dbus_interface

1213

814

return func

1214

1215

815

return decorator

1216

816

1217

817

1218

818

def dbus_annotations(annotations):

1219

819

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

1220

820

Usage:

1221

821

1222

822

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

1223

823

"org.freedesktop.DBus.Property."

1224

824

"EmitsChangedSignal": "false"})

1226

826

access="r")

1227

827

def Property_dbus_property(self):

1228

828

return dbus.Boolean(False)

1229

1230

See also the DBusObjectWithAnnotations class.

1231

829

"""

1232

1233

830

def decorator(func):

1234

831

func._dbus_annotations = annotations

1235

832

return func

1236

1237

833

return decorator

1238

834

1239

835

1242

838

"""

1243

839

pass

1244

840

1245

1246

841

class DBusPropertyAccessException(DBusPropertyException):

1247

842

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

1248

843

"""

1255

850

pass

1256

851

1257

852

1258

class DBusObjectWithAnnotations(dbus.service.Object):

1259

"""A D-Bus object with annotations.

1260

1261

Classes inheriting from this can use the dbus_annotations

1262

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.

1263

859

"""

1264

860

1265

861

@staticmethod

1266

862

def _is_dbus_thing(thing):

1267

863

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

1268

864

1269

865

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

1270

866

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

1271

867

"""

1272

868

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

1273

869

False)

1274

870

1275

871

def _get_all_dbus_things(self, thing):

1276

872

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

1277

873

"""

1278

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

874

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

875

name),

1279

876

athing.__get__(self))

1280

877

for cls in self.__class__.__mro__

1281

878

for name, athing in

1282

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

1283

1284

@dbus.service.method(dbus.INTROSPECTABLE_IFACE,

1285

out_signature="s",

1286

path_keyword='object_path',

1287

connection_keyword='connection')

1288

def Introspect(self, object_path, connection):

1289

"""Overloading of standard D-Bus method.

1290

1291

Inserts annotation tags on methods and signals.

1292

"""

1293

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

1294

connection)

1295

try:

1296

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

1297

1298

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

1299

# Add annotation tags

1300

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

1301

for tag in if_tag.getElementsByTagName(typ):

1302

annots = dict()

1303

for name, prop in (self.

1304

_get_all_dbus_things(typ)):

1305

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

1306

and prop._dbus_interface

1307

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

1308

annots.update(getattr(

1309

prop, "_dbus_annotations", {}))

1310

for name, value in annots.items():

1311

ann_tag = document.createElement(

1312

"annotation")

1313

ann_tag.setAttribute("name", name)

1314

ann_tag.setAttribute("value", value)

1315

tag.appendChild(ann_tag)

1316

# Add interface annotation tags

1317

for annotation, value in dict(

1318

itertools.chain.from_iterable(

1319

annotations().items()

1320

for name, annotations

1321

in self._get_all_dbus_things("interface")

1322

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

1323

)).items():

1324

ann_tag = document.createElement("annotation")

1325

ann_tag.setAttribute("name", annotation)

1326

ann_tag.setAttribute("value", value)

1327

if_tag.appendChild(ann_tag)

1328

# Fix argument name for the Introspect method itself

1329

if (if_tag.getAttribute("name")

1330

== dbus.INTROSPECTABLE_IFACE):

1331

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

1332

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

1333

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

1334

if (arg.getAttribute("direction")

1335

== "out"):

1336

arg.setAttribute("name",

1337

"xml_data")

1338

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

1339

document.unlink()

1340

except (AttributeError, xml.dom.DOMException,

1341

xml.parsers.expat.ExpatError) as error:

1342

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

1343

exc_info=error)

1344

return xmlstring

1345

1346

1347

class DBusObjectWithProperties(DBusObjectWithAnnotations):

1348

"""A D-Bus object with properties.

1349

1350

Classes inheriting from this can use the dbus_service_property

1351

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

1352

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

1353

"""

1354

879

inspect.getmembers(cls,

880

self._is_dbus_thing(thing)))

881

1355

882

def _get_dbus_property(self, interface_name, property_name):

1356

883

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

1357

884

property with the specified name and interface.

1358

885

"""

1359

for cls in self.__class__.__mro__:

1360

for name, value in inspect.getmembers(

1361

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"))):

1362

890

if (value._dbus_name == property_name

1363

891

and value._dbus_interface == interface_name):

1364

892

return value.__get__(self)

1365

893

1366

894

# No such property

1367

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

1368

self.dbus_object_path, interface_name, property_name))

1369

1370

@classmethod

1371

def _get_all_interface_names(cls):

1372

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

1373

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

1374

"_dbus_interface", None)

1375

for x in (inspect.getmro(cls))

1376

for attr in dir(x))

1377

if name is not None)

1378

1379

@dbus.service.method(dbus.PROPERTIES_IFACE,

1380

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",

1381

900

out_signature="v")

1382

901

def Get(self, interface_name, property_name):

1383

902

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

1389

908

if not hasattr(value, "variant_level"):

1390

909

return value

1391

910

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

1392

911

1393

912

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

1394

913

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

1395

914

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

1407

926

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

1408

927

for byte in value))

1409

928

prop(value)

1410

1411

@dbus.service.method(dbus.PROPERTIES_IFACE,

1412

in_signature="s",

929

930

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

1413

931

out_signature="a{sv}")

1414

932

def GetAll(self, interface_name):

1415

933

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

1416

934

standard.

1417

935

1418

936

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

1419

937

"""

1420

938

properties = {}

1430

948

if not hasattr(value, "variant_level"):

1431

949

properties[name] = value

1432

950

continue

1433

properties[name] = type(value)(

1434

value, variant_level=value.variant_level + 1)

951

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

952

value.variant_level+1)

1435

953

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

1436

954

1437

955

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

1438

956

def PropertiesChanged(self, interface_name, changed_properties,

1439

957

invalidated_properties):

1441

959

standard.

1442

960

"""

1443

961

pass

1444

962

1445

963

@dbus.service.method(dbus.INTROSPECTABLE_IFACE,

1446

964

out_signature="s",

1447

965

path_keyword='object_path',

1448

966

connection_keyword='connection')

1449

967

def Introspect(self, object_path, connection):

1450

968

"""Overloading of standard D-Bus method.

1451

969

1452

970

Inserts property tags and interface annotation tags.

1453

971

"""

1454

xmlstring = DBusObjectWithAnnotations.Introspect(self,

1455

object_path,

1456

connection)

972

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

973

connection)

1457

974

try:

1458

975

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

1459

1460

976

def make_tag(document, name, prop):

1461

977

e = document.createElement("property")

1462

978

e.setAttribute("name", name)

1463

979

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

1464

980

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

1465

981

return e

1466

1467

982

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

1468

983

# Add property tags

1469

984

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

1472

987

if prop._dbus_interface

1473

988

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

1474

989

if_tag.appendChild(tag)

1475

# Add annotation tags for properties

1476

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

1477

annots = dict()

1478

for name, prop in self._get_all_dbus_things(

1479

"property"):

1480

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

1481

and prop._dbus_interface

1482

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

1483

annots.update(getattr(

1484

prop, "_dbus_annotations", {}))

1485

for name, value in annots.items():

1486

ann_tag = document.createElement(

1487

"annotation")

1488

ann_tag.setAttribute("name", name)

1489

ann_tag.setAttribute("value", value)

1490

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)

1491

1021

# Add the names to the return values for the

1492

1022

# "org.freedesktop.DBus.Properties" methods

1493

1023

if (if_tag.getAttribute("name")

1512

1042

return xmlstring

1513

1043

1514

1044

1515

try:

1516

dbus.OBJECT_MANAGER_IFACE

1517

except AttributeError:

1518

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

1519

1520

1521

class DBusObjectWithObjectManager(DBusObjectWithAnnotations):

1522

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

1523

1524

Classes inheriting from this exposes the standard

1525

GetManagedObjects call and the InterfacesAdded and

1526

InterfacesRemoved signals on the standard

1527

"org.freedesktop.DBus.ObjectManager" interface.

1528

1529

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

1530

manually.

1531

"""

1532

@dbus.service.method(dbus.OBJECT_MANAGER_IFACE,

1533

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

1534

def GetManagedObjects(self):

1535

"""This function must be overridden"""

1536

raise NotImplementedError()

1537

1538

@dbus.service.signal(dbus.OBJECT_MANAGER_IFACE,

1539

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

1540

def InterfacesAdded(self, object_path, interfaces_and_properties):

1541

pass

1542

1543

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

1544

def InterfacesRemoved(self, object_path, interfaces):

1545

pass

1546

1547

@dbus.service.method(dbus.INTROSPECTABLE_IFACE,

1548

out_signature="s",

1549

path_keyword='object_path',

1550

connection_keyword='connection')

1551

def Introspect(self, object_path, connection):

1552

"""Overloading of standard D-Bus method.

1553

1554

Override return argument name of GetManagedObjects to be

1555

"objpath_interfaces_and_properties"

1556

"""

1557

xmlstring = DBusObjectWithAnnotations.Introspect(self,

1558

object_path,

1559

connection)

1560

try:

1561

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

1562

1563

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

1564

# Fix argument name for the GetManagedObjects method

1565

if (if_tag.getAttribute("name")

1566

== dbus.OBJECT_MANAGER_IFACE):

1567

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

1568

if (cn.getAttribute("name")

1569

== "GetManagedObjects"):

1570

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

1571

if (arg.getAttribute("direction")

1572

== "out"):

1573

arg.setAttribute(

1574

"name",

1575

"objpath_interfaces"

1576

"_and_properties")

1577

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

1578

document.unlink()

1579

except (AttributeError, xml.dom.DOMException,

1580

xml.parsers.expat.ExpatError) as error:

1581

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

1582

exc_info=error)

1583

return xmlstring

1584

1585

1586

1045

def datetime_to_dbus(dt, variant_level=0):

1587

1046

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

1588

1047

if dt is None:

1589

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

1590

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)

1591

1051

1592

1052

1593

1053

def alternate_dbus_interfaces(alt_interface_names, deprecate=True):

1595

1055

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

1596

1056

interface names according to the "alt_interface_names" mapping.

1597

1057

Usage:

1598

1058

1599

1059

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

1600

1060

"net.example.AlternateInterface"})

1601

1061

class SampleDBusObject(dbus.service.Object):

1602

1062

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

1603

1063

def SampleDBusMethod():

1604

1064

pass

1605

1065

1606

1066

The above "SampleDBusMethod" on "SampleDBusObject" will be

1607

1067

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

1608

1068

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

1609

1069

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

1610

1070

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

1611

1071

1612

1072

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

1613

1073

(from DBusObjectWithProperties) and interfaces (from the

1614

1074

dbus_interface_annotations decorator).

1615

1075

"""

1616

1617

1076

def wrapper(cls):

1618

1077

for orig_interface_name, alt_interface_name in (

1619

alt_interface_names.items()):

1078

alt_interface_names.items()):

1620

1079

attr = {}

1621

1080

interface_names = set()

1622

1081

# Go though all attributes of the class

1624

1083

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

1625

1084

# with the wrong interface name

1626

1085

if (not hasattr(attribute, "_dbus_interface")

1627

or not attribute._dbus_interface.startswith(

1628

orig_interface_name)):

1086

or not attribute._dbus_interface

1087

.startswith(orig_interface_name)):

1629

1088

continue

1630

1089

# Create an alternate D-Bus interface name based on

1631

1090

# the current name

1632

alt_interface = attribute._dbus_interface.replace(

1633

orig_interface_name, alt_interface_name)

1091

alt_interface = (attribute._dbus_interface

1092

.replace(orig_interface_name,

1093

alt_interface_name))

1634

1094

interface_names.add(alt_interface)

1635

1095

# Is this a D-Bus signal?

1636

1096

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

1637

1097

# Extract the original non-method undecorated

1638

1098

# function by black magic

1639

if sys.version_info.major == 2:

1640

nonmethod_func = (dict(

1099

nonmethod_func = (dict(

1641

1100

zip(attribute.func_code.co_freevars,

1642

attribute.__closure__))

1643

["func"].cell_contents)

1644

else:

1645

nonmethod_func = (dict(

1646

zip(attribute.__code__.co_freevars,

1647

attribute.__closure__))

1648

["func"].cell_contents)

1101

attribute.__closure__))["func"]

1102

.cell_contents)

1649

1103

# Create a new, but exactly alike, function

1650

1104

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

1651

1105

# with the alternate D-Bus interface name

1652

new_function = copy_function(nonmethod_func)

1653

new_function = (dbus.service.signal(

1654

alt_interface,

1655

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)))

1656

1115

# Copy annotations, if any

1657

1116

try:

1658

new_function._dbus_annotations = dict(

1659

attribute._dbus_annotations)

1117

new_function._dbus_annotations = (

1118

dict(attribute._dbus_annotations))

1660

1119

except AttributeError:

1661

1120

pass

1662

1663

1121

# Define a creator of a function to call both the

1664

1122

# original and alternate functions, so both the

1665

1123

# original and alternate signals gets sent when

1668

1126

"""This function is a scope container to pass

1669

1127

func1 and func2 to the "call_both" function

1670

1128

outside of its arguments"""

1671

1672

@functools.wraps(func2)

1673

1129

def call_both(*args, **kwargs):

1674

1130

"""This function will emit two D-Bus

1675

1131

signals by calling func1 and func2"""

1676

1132

func1(*args, **kwargs)

1677

1133

func2(*args, **kwargs)

1678

# Make wrapper function look like a D-Bus

1679

# signal

1680

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

1681

if name.startswith("_dbus_"):

1682

setattr(call_both, name, attr)

1683

1684

1134

return call_both

1685

1135

# Create the "call_both" function and add it to

1686

1136

# the class

1691

1141

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

1692

1142

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

1693

1143

# to the class.

1694

attr[attrname] = (

1695

dbus.service.method(

1696

alt_interface,

1697

attribute._dbus_in_signature,

1698

attribute._dbus_out_signature)

1699

(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)))

1700

1154

# Copy annotations, if any

1701

1155

try:

1702

attr[attrname]._dbus_annotations = dict(

1703

attribute._dbus_annotations)

1156

attr[attrname]._dbus_annotations = (

1157

dict(attribute._dbus_annotations))

1704

1158

except AttributeError:

1705

1159

pass

1706

1160

# Is this a D-Bus property?

1709

1163

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

1710

1164

# property with the alternate D-Bus interface

1711

1165

# name. Add it to the class.

1712

attr[attrname] = (dbus_service_property(

1713

alt_interface, attribute._dbus_signature,

1714

attribute._dbus_access,

1715

attribute._dbus_get_args_options

1716

["byte_arrays"])

1717

(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)))

1718

1179

# Copy annotations, if any

1719

1180

try:

1720

attr[attrname]._dbus_annotations = dict(

1721

attribute._dbus_annotations)

1181

attr[attrname]._dbus_annotations = (

1182

dict(attribute._dbus_annotations))

1722

1183

except AttributeError:

1723

1184

pass

1724

1185

# Is this a D-Bus interface?

1727

1188

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

1728

1189

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

1729

1190

# to the class.

1730

attr[attrname] = (

1731

dbus_interface_annotations(alt_interface)

1732

(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)))

1733

1199

if deprecate:

1734

1200

# Deprecate all alternate interfaces

1735

iname = "_AlternateDBusNames_interface_annotation{}"

1201

iname="_AlternateDBusNames_interface_annotation{}"

1736

1202

for interface_name in interface_names:

1737

1738

1203

@dbus_interface_annotations(interface_name)

1739

1204

def func(self):

1740

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

1741

"true"}

1205

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

1206

"true" }

1742

1207

# Find an unused name

1743

1208

for aname in (iname.format(i)

1744

1209

for i in itertools.count()):

1748

1213

if interface_names:

1749

1214

# Replace the class with a new subclass of it with

1750

1215

# methods, signals, etc. as created above.

1751

if sys.version_info.major == 2:

1752

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

1753

(cls, ), attr)

1754

else:

1755

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

1756

(cls, ), attr)

1216

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

1217

(cls,), attr)

1757

1218

return cls

1758

1759

1219

return wrapper

1760

1220

1761

1221

1762

1222

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

1763

"se.bsnet.fukt.Mandos"})

1223

"se.bsnet.fukt.Mandos"})

1764

1224

class ClientDBus(Client, DBusObjectWithProperties):

1765

1225

"""A Client class using D-Bus

1766

1226

1767

1227

Attributes:

1768

1228

dbus_object_path: dbus.ObjectPath

1769

1229

bus: dbus.SystemBus()

1770

1230

"""

1771

1231

1772

1232

runtime_expansions = (Client.runtime_expansions

1773

+ ("dbus_object_path", ))

1774

1233

+ ("dbus_object_path",))

1234

1775

1235

_interface = "se.recompile.Mandos.Client"

1776

1236

1777

1237

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

1778

1779

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

1238

1239

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

1780

1240

self.bus = bus

1781

1241

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

1782

1242

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

1784

1244

client_object_name = str(self.name).translate(

1785

1245

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

1786

1246

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

1787

self.dbus_object_path = dbus.ObjectPath(

1788

"/clients/" + client_object_name)

1247

self.dbus_object_path = (dbus.ObjectPath

1248

("/clients/" + client_object_name))

1789

1249

DBusObjectWithProperties.__init__(self, self.bus,

1790

1250

self.dbus_object_path)

1791

1792

def notifychangeproperty(transform_func, dbus_name,

1793

type_func=lambda x: x,

1794

variant_level=1,

1795

invalidate_only=False,

1251

1252

def notifychangeproperty(transform_func,

1253

dbus_name, type_func=lambda x: x,

1254

variant_level=1, invalidate_only=False,

1796

1255

_interface=_interface):

1797

1256

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

1798

1257

its changes to DBus.

1799

1258

1800

1259

transform_fun: Function that takes a value and a variant_level

1801

1260

and transforms it to a D-Bus type.

1802

1261

dbus_name: D-Bus name of the variable

1805

1264

variant_level: D-Bus variant level. Default: 1

1806

1265

"""

1807

1266

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

1808

1809

1267

def setter(self, value):

1810

1268

if hasattr(self, "dbus_object_path"):

1811

1269

if (not hasattr(self, attrname) or

1812

1270

type_func(getattr(self, attrname, None))

1813

1271

!= type_func(value)):

1814

1272

if invalidate_only:

1815

self.PropertiesChanged(

1816

_interface, dbus.Dictionary(),

1817

dbus.Array((dbus_name, )))

1273

self.PropertiesChanged(_interface,

1274

dbus.Dictionary(),

1275

dbus.Array

1276

((dbus_name,)))

1818

1277

else:

1819

dbus_value = transform_func(

1820

type_func(value),

1821

variant_level=variant_level)

1278

dbus_value = transform_func(type_func(value),

1279

variant_level

1280

=variant_level)

1822

1281

self.PropertyChanged(dbus.String(dbus_name),

1823

1282

dbus_value)

1824

self.PropertiesChanged(

1825

_interface,

1826

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

1827

dbus_value}),

1828

dbus.Array())

1283

self.PropertiesChanged(_interface,

1284

dbus.Dictionary({

1285

dbus.String(dbus_name):

1286

dbus_value }), dbus.Array())

1829

1287

setattr(self, attrname, value)

1830

1288

1831

1289

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

1832

1290

1833

1291

expires = notifychangeproperty(datetime_to_dbus, "Expires")

1834

1292

approvals_pending = notifychangeproperty(dbus.Boolean,

1835

1293

"ApprovalPending",

1836

type_func=bool)

1294

type_func = bool)

1837

1295

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

1838

1296

last_enabled = notifychangeproperty(datetime_to_dbus,

1839

1297

"LastEnabled")

1840

checker = notifychangeproperty(

1841

dbus.Boolean, "CheckerRunning",

1842

type_func=lambda checker: checker is not None)

1298

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

1299

type_func = lambda checker:

1300

checker is not None)

1843

1301

last_checked_ok = notifychangeproperty(datetime_to_dbus,

1844

1302

"LastCheckedOK")

1845

1303

last_checker_status = notifychangeproperty(dbus.Int16,

1848

1306

datetime_to_dbus, "LastApprovalRequest")

1849

1307

approved_by_default = notifychangeproperty(dbus.Boolean,

1850

1308

"ApprovedByDefault")

1851

approval_delay = notifychangeproperty(

1852

dbus.UInt64, "ApprovalDelay",

1853

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)

1854

1314

approval_duration = notifychangeproperty(

1855

1315

dbus.UInt64, "ApprovalDuration",

1856

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

1316

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

1857

1317

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

1858

timeout = notifychangeproperty(

1859

dbus.UInt64, "Timeout",

1860

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

1318

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

1319

type_func = lambda td:

1320

td.total_seconds() * 1000)

1861

1321

extended_timeout = notifychangeproperty(

1862

1322

dbus.UInt64, "ExtendedTimeout",

1863

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

1864

interval = notifychangeproperty(

1865

dbus.UInt64, "Interval",

1866

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)

1867

1329

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

1868

1330

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

1869

1331

invalidate_only=True)

1870

1332

1871

1333

del notifychangeproperty

1872

1334

1873

1335

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

1874

1336

try:

1875

1337

self.remove_from_connection()

1878

1340

if hasattr(DBusObjectWithProperties, "__del__"):

1879

1341

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

1880

1342

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

1881

1882

def checker_callback(self, source, condition,

1883

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

1884

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

1885

connection, command, *args,

1886

**kwargs)

1887

exitstatus = self.last_checker_status

1888

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)

1889

1350

# Emit D-Bus signal

1890

1351

self.CheckerCompleted(dbus.Int16(exitstatus),

1891

# This is specific to GNU libC

1892

dbus.Int64(exitstatus << 8),

1352

dbus.Int64(condition),

1893

1353

dbus.String(command))

1894

1354

else:

1895

1355

# Emit D-Bus signal

1896

1356

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

1897

dbus.Int64(

1898

# This is specific to GNU libC

1899

(exitstatus << 8)

1900

| self.last_checker_signal),

1357

dbus.Int64(condition),

1901

1358

dbus.String(command))

1902

return ret

1903

1359

1360

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

1361

*args, **kwargs)

1362

1904

1363

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

1905

1364

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

1906

1365

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

1910

1369

# Emit D-Bus signal

1911

1370

self.CheckerStarted(self.current_checker_command)

1912

1371

return r

1913

1372

1914

1373

def _reset_approved(self):

1915

1374

self.approved = None

1916

1375

return False

1917

1376

1918

1377

def approve(self, value=True):

1919

1378

self.approved = value

1920

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

1921

* 1000), self._reset_approved)

1379

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

1380

* 1000), self._reset_approved)

1922

1381

self.send_changedstate()

1923

1924

# D-Bus methods, signals & properties

1925

1926

# Interfaces

1927

1928

# Signals

1929

1382

1383

## D-Bus methods, signals & properties

1384

1385

## Interfaces

1386

1387

## Signals

1388

1930

1389

# CheckerCompleted - signal

1931

1390

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

1932

1391

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

1933

1392

"D-Bus signal"

1934

1393

pass

1935

1394

1936

1395

# CheckerStarted - signal

1937

1396

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

1938

1397

def CheckerStarted(self, command):

1939

1398

"D-Bus signal"

1940

1399

pass

1941

1400

1942

1401

# PropertyChanged - signal

1943

1402

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

1944

1403

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

1945

1404

def PropertyChanged(self, property, value):

1946

1405

"D-Bus signal"

1947

1406

pass

1948

1407

1949

1408

# GotSecret - signal

1950

1409

@dbus.service.signal(_interface)

1951

1410

def GotSecret(self):

1954

1413

server to mandos-client

1955

1414

"""

1956

1415

pass

1957

1416

1958

1417

# Rejected - signal

1959

1418

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

1960

1419

def Rejected(self, reason):

1961

1420

"D-Bus signal"

1962

1421

pass

1963

1422

1964

1423

# NeedApproval - signal

1965

1424

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

1966

1425

def NeedApproval(self, timeout, default):

1967

1426

"D-Bus signal"

1968

1427

return self.need_approval()

1969

1970

# Methods

1971

1428

1429

## Methods

1430

1972

1431

# Approve - method

1973

1432

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

1974

1433

def Approve(self, value):

1975

1434

self.approve(value)

1976

1435

1977

1436

# CheckedOK - method

1978

1437

@dbus.service.method(_interface)

1979

1438

def CheckedOK(self):

1980

1439

self.checked_ok()

1981

1440

1982

1441

# Enable - method

1983

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

1984

1442

@dbus.service.method(_interface)

1985

1443

def Enable(self):

1986

1444

"D-Bus method"

1987

1445

self.enable()

1988

1446

1989

1447

# StartChecker - method

1990

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

1991

1448

@dbus.service.method(_interface)

1992

1449

def StartChecker(self):

1993

1450

"D-Bus method"

1994

1451

self.start_checker()

1995

1452

1996

1453

# Disable - method

1997

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

1998

1454

@dbus.service.method(_interface)

1999

1455

def Disable(self):

2000

1456

"D-Bus method"

2001

1457

self.disable()

2002

1458

2003

1459

# StopChecker - method

2004

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

2005

1460

@dbus.service.method(_interface)

2006

1461

def StopChecker(self):

2007

1462

self.stop_checker()

2008

2009

# Properties

2010

1463

1464

## Properties

1465

2011

1466

# ApprovalPending - property

2012

1467

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

2013

1468

def ApprovalPending_dbus_property(self):

2014

1469

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

2015

1470

2016

1471

# ApprovedByDefault - property

2017

@dbus_service_property(_interface,

2018

signature="b",

1472

@dbus_service_property(_interface, signature="b",

2019

1473

access="readwrite")

2020

1474

def ApprovedByDefault_dbus_property(self, value=None):

2021

1475

if value is None: # get

2022

1476

return dbus.Boolean(self.approved_by_default)

2023

1477

self.approved_by_default = bool(value)

2024

1478

2025

1479

# ApprovalDelay - property

2026

@dbus_service_property(_interface,

2027

signature="t",

1480

@dbus_service_property(_interface, signature="t",

2028

1481

access="readwrite")

2029

1482

def ApprovalDelay_dbus_property(self, value=None):

2030

1483

if value is None: # get

2031

1484

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

2032

1485

* 1000)

2033

1486

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

2034

1487

2035

1488

# ApprovalDuration - property

2036

@dbus_service_property(_interface,

2037

signature="t",

1489

@dbus_service_property(_interface, signature="t",

2038

1490

access="readwrite")

2039

1491

def ApprovalDuration_dbus_property(self, value=None):

2040

1492

if value is None: # get

2041

1493

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

2042

1494

* 1000)

2043

1495

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

2044

1496

2045

1497

# Name - property

2046

@dbus_annotations(

2047

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

2048

1498

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

2049

1499

def Name_dbus_property(self):

2050

1500

return dbus.String(self.name)

2051

2052

# KeyID - property

2053

@dbus_annotations(

2054

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

2055

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

2056

def KeyID_dbus_property(self):

2057

return dbus.String(self.key_id)

2058

1501

2059

1502

# Fingerprint - property

2060

@dbus_annotations(

2061

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

2062

1503

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

2063

1504

def Fingerprint_dbus_property(self):

2064

1505

return dbus.String(self.fingerprint)

2065

1506

2066

1507

# Host - property

2067

@dbus_service_property(_interface,

2068

signature="s",

1508

@dbus_service_property(_interface, signature="s",

2069

1509

access="readwrite")

2070

1510

def Host_dbus_property(self, value=None):

2071

1511

if value is None: # get

2072

1512

return dbus.String(self.host)

2073

1513

self.host = str(value)

2074

1514

2075

1515

# Created - property

2076

@dbus_annotations(

2077

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

2078

1516

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

2079

1517

def Created_dbus_property(self):

2080

1518

return datetime_to_dbus(self.created)

2081

1519

2082

1520

# LastEnabled - property

2083

1521

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

2084

1522

def LastEnabled_dbus_property(self):

2085

1523

return datetime_to_dbus(self.last_enabled)

2086

1524

2087

1525

# Enabled - property

2088

@dbus_service_property(_interface,

2089

signature="b",

1526

@dbus_service_property(_interface, signature="b",

2090

1527

access="readwrite")

2091

1528

def Enabled_dbus_property(self, value=None):

2092

1529

if value is None: # get

2095

1532

self.enable()

2096

1533

else:

2097

1534

self.disable()

2098

1535

2099

1536

# LastCheckedOK - property

2100

@dbus_service_property(_interface,

2101

signature="s",

1537

@dbus_service_property(_interface, signature="s",

2102

1538

access="readwrite")

2103

1539

def LastCheckedOK_dbus_property(self, value=None):

2104

1540

if value is not None:

2105

1541

self.checked_ok()

2106

1542

return

2107

1543

return datetime_to_dbus(self.last_checked_ok)

2108

1544

2109

1545

# LastCheckerStatus - property

2110

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

1546

@dbus_service_property(_interface, signature="n",

1547

access="read")

2111

1548

def LastCheckerStatus_dbus_property(self):

2112

1549

return dbus.Int16(self.last_checker_status)

2113

1550

2114

1551

# Expires - property

2115

1552

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

2116

1553

def Expires_dbus_property(self):

2117

1554

return datetime_to_dbus(self.expires)

2118

1555

2119

1556

# LastApprovalRequest - property

2120

1557

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

2121

1558

def LastApprovalRequest_dbus_property(self):

2122

1559

return datetime_to_dbus(self.last_approval_request)

2123

1560

2124

1561

# Timeout - property

2125

@dbus_service_property(_interface,

2126

signature="t",

1562

@dbus_service_property(_interface, signature="t",

2127

1563

access="readwrite")

2128

1564

def Timeout_dbus_property(self, value=None):

2129

1565

if value is None: # get

2141

1577

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

2142

1578

is None):

2143

1579

return

2144

GLib.source_remove(self.disable_initiator_tag)

2145

self.disable_initiator_tag = GLib.timeout_add(

2146

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

2147

self.disable)

2148

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

2149

1586

# ExtendedTimeout - property

2150

@dbus_service_property(_interface,

2151

signature="t",

1587

@dbus_service_property(_interface, signature="t",

2152

1588

access="readwrite")

2153

1589

def ExtendedTimeout_dbus_property(self, value=None):

2154

1590

if value is None: # get

2155

1591

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

2156

1592

* 1000)

2157

1593

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

2158

1594

2159

1595

# Interval - property

2160

@dbus_service_property(_interface,

2161

signature="t",

1596

@dbus_service_property(_interface, signature="t",

2162

1597

access="readwrite")

2163

1598

def Interval_dbus_property(self, value=None):

2164

1599

if value is None: # get

2168

1603

return

2169

1604

if self.enabled:

2170

1605

# Reschedule checker run

2171

GLib.source_remove(self.checker_initiator_tag)

2172

self.checker_initiator_tag = GLib.timeout_add(

2173

value, self.start_checker)

2174

self.start_checker() # Start one now, too

2175

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

2176

1611

# Checker - property

2177

@dbus_service_property(_interface,

2178

signature="s",

1612

@dbus_service_property(_interface, signature="s",

2179

1613

access="readwrite")

2180

1614

def Checker_dbus_property(self, value=None):

2181

1615

if value is None: # get

2182

1616

return dbus.String(self.checker_command)

2183

1617

self.checker_command = str(value)

2184

1618

2185

1619

# CheckerRunning - property

2186

@dbus_service_property(_interface,

2187

signature="b",

1620

@dbus_service_property(_interface, signature="b",

2188

1621

access="readwrite")

2189

1622

def CheckerRunning_dbus_property(self, value=None):

2190

1623

if value is None: # get

2193

1626

self.start_checker()

2194

1627

else:

2195

1628

self.stop_checker()

2196

1629

2197

1630

# ObjectPath - property

2198

@dbus_annotations(

2199

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

2200

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

2201

1631

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

2202

1632

def ObjectPath_dbus_property(self):

2203

return self.dbus_object_path # is already a dbus.ObjectPath

2204

1633

return self.dbus_object_path # is already a dbus.ObjectPath

1634

2205

1635

# Secret = property

2206

@dbus_annotations(

2207

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

2208

"invalidates"})

2209

@dbus_service_property(_interface,

2210

signature="ay",

2211

access="write",

2212

byte_arrays=True)

1636

@dbus_service_property(_interface, signature="ay",

1637

access="write", byte_arrays=True)

2213

1638

def Secret_dbus_property(self, value):

2214

1639

self.secret = bytes(value)

2215

1640

2216

1641

del _interface

2217

1642

2218

1643

2219

class ProxyClient:

2220

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

1644

class ProxyClient(object):

1645

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

2221

1646

self._pipe = child_pipe

2222

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

1647

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

2223

1648

if not self._pipe.recv():

2224

raise KeyError(key_id or fpr)

2225

1649

raise KeyError()

1650

2226

1651

def __getattribute__(self, name):

2227

1652

if name == '_pipe':

2228

1653

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

2231

1656

if data[0] == 'data':

2232

1657

return data[1]

2233

1658

if data[0] == 'function':

2234

2235

1659

def func(*args, **kwargs):

2236

1660

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

2237

1661

return self._pipe.recv()[1]

2238

2239

1662

return func

2240

1663

2241

1664

def __setattr__(self, name, value):

2242

1665

if name == '_pipe':

2243

1666

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

2246

1669

2247

1670

class ClientHandler(socketserver.BaseRequestHandler, object):

2248

1671

"""A class to handle client connections.

2249

1672

2250

1673

Instantiated once for each connection to handle it.

2251

1674

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

2252

1675

2253

1676

def handle(self):

2254

1677

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

2255

1678

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

2256

1679

str(self.client_address))

2257

1680

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

2258

1681

self.server.child_pipe.fileno())

2259

2260

session = gnutls.ClientSession(self.request)

2261

2262

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

2263

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

2264

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

2265

# "+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"))

2266

1697

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

2267

1698

priority = self.server.gnutls_priority

2268

1699

if priority is None:

2269

1700

priority = "NORMAL"

2270

gnutls.priority_set_direct(session._c_object,

2271

priority.encode("utf-8"),

2272

None)

2273

1701

(gnutls.library.functions

1702

.gnutls_priority_set_direct(session._c_object,

1703

priority, None))

1704

2274

1705

# Start communication using the Mandos protocol

2275

1706

# Get protocol number

2276

1707

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

2281

1712

except (ValueError, IndexError, RuntimeError) as error:

2282

1713

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

2283

1714

return

2284

1715

2285

1716

# Start GnuTLS connection

2286

1717

try:

2287

1718

session.handshake()

2288

except gnutls.Error as error:

1719

except gnutls.errors.GNUTLSError as error:

2289

1720

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

2290

1721

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

2291

1722

# established. Just abandon the request.

2292

1723

return

2293

1724

logger.debug("Handshake succeeded")

2294

1725

2295

1726

approval_required = False

2296

1727

try:

2297

if gnutls.has_rawpk:

2298

fpr = b""

2299

try:

2300

key_id = self.key_id(

2301

self.peer_certificate(session))

2302

except (TypeError, gnutls.Error) as error:

2303

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

2304

return

2305

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

2306

2307

else:

2308

key_id = b""

2309

try:

2310

fpr = self.fingerprint(

2311

self.peer_certificate(session))

2312

except (TypeError, gnutls.Error) as error:

2313

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

2314

return

2315

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

2316

2317

try:

2318

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,

2319

1739

self.client_address)

2320

1740

except KeyError:

2321

1741

return

2322

1742

2323

1743

if client.approval_delay:

2324

1744

delay = client.approval_delay

2325

1745

client.approvals_pending += 1

2326

1746

approval_required = True

2327

1747

2328

1748

while True:

2329

1749

if not client.enabled:

2330

1750

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

2331

client.name)

1751

client.name)

2332

1752

if self.server.use_dbus:

2333

1753

# Emit D-Bus signal

2334

1754

client.Rejected("Disabled")

2335

1755

return

2336

1756

2337

1757

if client.approved or not client.approval_delay:

2338

# We are approved or approval is disabled

1758

#We are approved or approval is disabled

2339

1759

break

2340

1760

elif client.approved is None:

2341

1761

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

2352

1772

# Emit D-Bus signal

2353

1773

client.Rejected("Denied")

2354

1774

return

2355

2356

# wait until timeout or approved

1775

1776

#wait until timeout or approved

2357

1777

time = datetime.datetime.now()

2358

1778

client.changedstate.acquire()

2359

1779

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

2372

1792

break

2373

1793

else:

2374

1794

delay -= time2 - time

2375

2376

try:

2377

session.send(client.secret)

2378

except gnutls.Error as error:

2379

logger.warning("gnutls send failed",

2380

exc_info=error)

2381

return

2382

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

2383

1809

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

2384

1810

# bump the timeout using extended_timeout

2385

1811

client.bump_timeout(client.extended_timeout)

2386

1812

if self.server.use_dbus:

2387

1813

# Emit D-Bus signal

2388

1814

client.GotSecret()

2389

1815

2390

1816

finally:

2391

1817

if approval_required:

2392

1818

client.approvals_pending -= 1

2393

1819

try:

2394

1820

session.bye()

2395

except gnutls.Error as error:

1821

except gnutls.errors.GNUTLSError as error:

2396

1822

logger.warning("GnuTLS bye failed",

2397

1823

exc_info=error)

2398

1824

2399

1825

@staticmethod

2400

1826

def peer_certificate(session):

2401

"Return the peer's certificate as a bytestring"

2402

try:

2403

cert_type = gnutls.certificate_type_get2(session._c_object,

2404

gnutls.CTYPE_PEERS)

2405

except AttributeError:

2406

cert_type = gnutls.certificate_type_get(session._c_object)

2407

if gnutls.has_rawpk:

2408

valid_cert_types = frozenset((gnutls.CRT_RAWPK,))

2409

else:

2410

valid_cert_types = frozenset((gnutls.CRT_OPENPGP,))

2411

# If not a valid certificate type...

2412

if cert_type not in valid_cert_types:

2413

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

2414

valid_cert_types)

2415

# ...return invalid data

2416

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

2417

1834

list_size = ctypes.c_uint(1)

2418

cert_list = (gnutls.certificate_get_peers

1835

cert_list = (gnutls.library.functions

1836

.gnutls_certificate_get_peers

2419

1837

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

2420

1838

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

2421

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

1839

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

1840

" certificate")

2422

1841

if list_size.value == 0:

2423

1842

return None

2424

1843

cert = cert_list[0]

2425

1844

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

2426

2427

@staticmethod

2428

def key_id(certificate):

2429

"Convert a certificate bytestring to a hexdigit key ID"

2430

# New GnuTLS "datum" with the public key

2431

datum = gnutls.datum_t(

2432

ctypes.cast(ctypes.c_char_p(certificate),

2433

ctypes.POINTER(ctypes.c_ubyte)),

2434

ctypes.c_uint(len(certificate)))

2435

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

2436

# New empty GnuTLS certificate

2437

pubkey = gnutls.pubkey_t()

2438

gnutls.pubkey_init(ctypes.byref(pubkey))

2439

# Import the raw public key into the certificate

2440

gnutls.pubkey_import(pubkey,

2441

ctypes.byref(datum),

2442

gnutls.X509_FMT_DER)

2443

# New buffer for the key ID

2444

buf = ctypes.create_string_buffer(32)

2445

buf_len = ctypes.c_size_t(len(buf))

2446

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

2447

gnutls.pubkey_get_key_id(pubkey,

2448

gnutls.KEYID_USE_SHA256,

2449

ctypes.cast(ctypes.byref(buf),

2450

ctypes.POINTER(ctypes.c_ubyte)),

2451

ctypes.byref(buf_len))

2452

# Deinit the certificate

2453

gnutls.pubkey_deinit(pubkey)

2454

2455

# Convert the buffer to a Python bytestring

2456

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

2457

# Convert the bytestring to hexadecimal notation

2458

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

2459

return hex_key_id

2460

1845

2461

1846

@staticmethod

2462

1847

def fingerprint(openpgp):

2463

1848

"Convert an OpenPGP bytestring to a hexdigit fingerprint"

2464

1849

# New GnuTLS "datum" with the OpenPGP public key

2465

datum = gnutls.datum_t(

2466

ctypes.cast(ctypes.c_char_p(openpgp),

2467

ctypes.POINTER(ctypes.c_ubyte)),

2468

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))))

2469

1855

# New empty GnuTLS certificate

2470

crt = gnutls.openpgp_crt_t()

2471

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)))

2472

1859

# Import the OpenPGP public key into the certificate

2473

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

2474

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))

2475

1864

# Verify the self signature in the key

2476

1865

crtverify = ctypes.c_uint()

2477

gnutls.openpgp_crt_verify_self(crt, 0,

2478

ctypes.byref(crtverify))

1866

(gnutls.library.functions

1867

.gnutls_openpgp_crt_verify_self(crt, 0,

1868

ctypes.byref(crtverify)))

2479

1869

if crtverify.value != 0:

2480

gnutls.openpgp_crt_deinit(crt)

2481

raise gnutls.CertificateSecurityError(code

2482

=crtverify.value)

1870

gnutls.library.functions.gnutls_openpgp_crt_deinit(crt)

1871

raise (gnutls.errors.CertificateSecurityError

1872

("Verify failed"))

2483

1873

# New buffer for the fingerprint

2484

1874

buf = ctypes.create_string_buffer(20)

2485

1875

buf_len = ctypes.c_size_t()

2486

1876

# Get the fingerprint from the certificate into the buffer

2487

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

2488

ctypes.byref(buf_len))

1877

(gnutls.library.functions

1878

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

1879

ctypes.byref(buf_len)))

2489

1880

# Deinit the certificate

2490

gnutls.openpgp_crt_deinit(crt)

1881

gnutls.library.functions.gnutls_openpgp_crt_deinit(crt)

2491

1882

# Convert the buffer to a Python bytestring

2492

1883

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

2493

1884

# Convert the bytestring to hexadecimal notation

2495

1886

return hex_fpr

2496

1887

2497

1888

2498

class MultiprocessingMixIn:

1889

class MultiprocessingMixIn(object):

2499

1890

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

2500

2501

1891

def sub_process_main(self, request, address):

2502

1892

try:

2503

1893

self.finish_request(request, address)

2504

1894

except Exception:

2505

1895

self.handle_error(request, address)

2506

1896

self.close_request(request)

2507

1897

2508

1898

def process_request(self, request, address):

2509

1899

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

2510

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

2511

args=(request, address))

1900

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

1901

args = (request, address))

2512

1902

proc.start()

2513

1903

return proc

2514

1904

2515

1905

2516

class MultiprocessingMixInWithPipe(MultiprocessingMixIn):

1906

class MultiprocessingMixInWithPipe(MultiprocessingMixIn, object):

2517

1907

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

2518

2519

1908

def process_request(self, request, client_address):

2520

1909

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

2521

1910

2522

1911

This function creates a new pipe in self.pipe

2523

1912

"""

2524

1913

parent_pipe, self.child_pipe = multiprocessing.Pipe()

2525

1914

2526

1915

proc = MultiprocessingMixIn.process_request(self, request,

2527

1916

client_address)

2528

1917

self.child_pipe.close()

2529

1918

self.add_pipe(parent_pipe, proc)

2530

1919

2531

1920

def add_pipe(self, parent_pipe, proc):

2532

1921

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

2533

1922

raise NotImplementedError()

2534

1923

2535

1924

2536

1925

class IPv6_TCPServer(MultiprocessingMixInWithPipe,

2537

socketserver.TCPServer):

1926

socketserver.TCPServer, object):

2538

1927

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

2539

1928

2540

1929

Attributes:

2541

1930

enabled: Boolean; whether this server is activated yet

2542

1931

interface: None or a network interface name (string)

2543

1932

use_ipv6: Boolean; to use IPv6 or not

2544

1933

"""

2545

2546

1934

def __init__(self, server_address, RequestHandlerClass,

2547

interface=None,

2548

use_ipv6=True,

2549

socketfd=None):

1935

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

2550

1936

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

2551

1937

creating a new one with socket.socket().

2552

1938

"""

2558

1944

self.socketfd = socketfd

2559

1945

# Save the original socket.socket() function

2560

1946

self.socket_socket = socket.socket

2561

2562

1947

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

2563

#

1948

#

2564

1949

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

2565

1950

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

2566

1951

# patching socket.socket.)

2567

#

1952

#

2568

1953

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

2569

1954

@functools.wraps(socket.socket)

2570

1955

def socket_wrapper(*args, **kwargs):

2582

1967

# socket_wrapper(), if socketfd was set.

2583

1968

socketserver.TCPServer.__init__(self, server_address,

2584

1969

RequestHandlerClass)

2585

1970

2586

1971

def server_bind(self):

2587

1972

"""This overrides the normal server_bind() function

2588

1973

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

2589

1974

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

2590

global SO_BINDTODEVICE

2591

1975

if self.interface is not None:

2592

1976

if SO_BINDTODEVICE is None:

2593

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

2594

# common enough.

2595

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

2596

SO_BINDTODEVICE = 25

2597

try:

2598

self.socket.setsockopt(

2599

socket.SOL_SOCKET, SO_BINDTODEVICE,

2600

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

2601

except socket.error as error:

2602

if error.errno == errno.EPERM:

2603

logger.error("No permission to bind to"

2604

" interface %s", self.interface)

2605

elif error.errno == errno.ENOPROTOOPT:

2606

logger.error("SO_BINDTODEVICE not available;"

2607

" cannot bind to interface %s",

2608

self.interface)

2609

elif error.errno == errno.ENODEV:

2610

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

2611

" cannot bind", self.interface)

2612

else:

2613

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

2614

1999

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

2615

2000

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

2616

if self.server_address[1]:

2617

self.allow_reuse_address = True

2618

2001

if not self.server_address[0]:

2619

2002

if self.address_family == socket.AF_INET6:

2620

any_address = "::" # in6addr_any

2003

any_address = "::" # in6addr_any

2621

2004

else:

2622

any_address = "0.0.0.0" # INADDR_ANY

2005

any_address = "0.0.0.0" # INADDR_ANY

2623

2006

self.server_address = (any_address,

2624

2007

self.server_address[1])

2625

2008

elif not self.server_address[1]:

2626

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

2009

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

2010

0)

2627

2011

# if self.interface:

2628

2012

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

2629

2013

# 0, # port

2635

2019

2636

2020

class MandosServer(IPv6_TCPServer):

2637

2021

"""Mandos server.

2638

2022

2639

2023

Attributes:

2640

2024

clients: set of Client objects

2641

2025

gnutls_priority GnuTLS priority string

2642

2026

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

2643

2644

Assumes a GLib.MainLoop event loop.

2027

2028

Assumes a gobject.MainLoop event loop.

2645

2029

"""

2646

2647

2030

def __init__(self, server_address, RequestHandlerClass,

2648

interface=None,

2649

use_ipv6=True,

2650

clients=None,

2651

gnutls_priority=None,

2652

use_dbus=True,

2653

socketfd=None):

2031

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

2032

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

2654

2033

self.enabled = False

2655

2034

self.clients = clients

2656

2035

if self.clients is None:

2659

2038

self.gnutls_priority = gnutls_priority

2660

2039

IPv6_TCPServer.__init__(self, server_address,

2661

2040

RequestHandlerClass,

2662

interface=interface,

2663

use_ipv6=use_ipv6,

2664

socketfd=socketfd)

2665

2041

interface = interface,

2042

use_ipv6 = use_ipv6,

2043

socketfd = socketfd)

2666

2044

def server_activate(self):

2667

2045

if self.enabled:

2668

2046

return socketserver.TCPServer.server_activate(self)

2669

2047

2670

2048

def enable(self):

2671

2049

self.enabled = True

2672

2050

2673

2051

def add_pipe(self, parent_pipe, proc):

2674

2052

# Call "handle_ipc" for both data and EOF events

2675

GLib.io_add_watch(

2676

parent_pipe.fileno(),

2677

GLib.IO_IN | GLib.IO_HUP,

2678

functools.partial(self.handle_ipc,

2679

parent_pipe=parent_pipe,

2680

proc=proc))

2681

2682

def handle_ipc(self, source, condition,

2683

parent_pipe=None,

2684

proc=None,

2685

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):

2686

2062

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

2687

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

2063

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

2688

2064

# Wait for other process to exit

2689

2065

proc.join()

2690

2066

return False

2691

2067

2692

2068

# Read a request from the child

2693

2069

request = parent_pipe.recv()

2694

2070

command = request[0]

2695

2071

2696

2072

if command == 'init':

2697

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

2698

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

2699

address = request[3]

2700

2701

for c in self.clients.values():

2702

if key_id == "E3B0C44298FC1C149AFBF4C8996FB92427AE41E4649B934CA495991B7852B855":

2703

continue

2704

if key_id and c.key_id == key_id:

2705

client = c

2706

break

2707

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:

2708

2078

client = c

2709

2079

break

2710

2080

else:

2711

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

2712

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

2081

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

2082

"dress: %s", fpr, address)

2713

2083

if self.use_dbus:

2714

2084

# Emit D-Bus signal

2715

mandos_dbus_service.ClientNotFound(key_id or fpr,

2085

mandos_dbus_service.ClientNotFound(fpr,

2716

2086

address[0])

2717

2087

parent_pipe.send(False)

2718

2088

return False

2719

2720

GLib.io_add_watch(

2721

parent_pipe.fileno(),

2722

GLib.IO_IN | GLib.IO_HUP,

2723

functools.partial(self.handle_ipc,

2724

parent_pipe=parent_pipe,

2725

proc=proc,

2726

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))

2727

2098

parent_pipe.send(True)

2728

2099

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

2729

2100

# same fileno

2732

2103

funcname = request[1]

2733

2104

args = request[2]

2734

2105

kwargs = request[3]

2735

2106

2736

2107

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

2737

2108

funcname)(*args,

2738

**kwargs)))

2739

2109

**kwargs)))

2110

2740

2111

if command == 'getattr':

2741

2112

attrname = request[1]

2742

if isinstance(client_object.__getattribute__(attrname),

2743

collections.Callable):

2744

parent_pipe.send(('function', ))

2113

if callable(client_object.__getattribute__(attrname)):

2114

parent_pipe.send(('function',))

2745

2115

else:

2746

parent_pipe.send((

2747

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

2748

2116

parent_pipe.send(('data', client_object

2117

.__getattribute__(attrname)))

2118

2749

2119

if command == 'setattr':

2750

2120

attrname = request[1]

2751

2121

value = request[2]

2752

2122

setattr(client_object, attrname, value)

2753

2123

2754

2124

return True

2755

2125

2756

2126

2757

2127

def rfc3339_duration_to_delta(duration):

2758

2128

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

2759

2129

2760

2130

>>> rfc3339_duration_to_delta("P7D")

2761

2131

datetime.timedelta(7)

2762

2132

>>> rfc3339_duration_to_delta("PT60S")

2772

2142

>>> rfc3339_duration_to_delta("P1DT3M20S")

2773

2143

datetime.timedelta(1, 200)

2774

2144

"""

2775

2145

2776

2146

# Parsing an RFC 3339 duration with regular expressions is not

2777

2147

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

2778

2148

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

2779

2149

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

2780

2150

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

2781

2151

# avoid excessive use of external libraries.

2782

2152

2783

2153

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

2784

Token = collections.namedtuple("Token", (

2785

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

2786

# a "group" containing digits

2787

"value", # datetime.timedelta or None

2788

"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

2789

2163

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

2790

2164

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

2791

2165

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

2792

2166

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

2793

2167

datetime.timedelta(seconds=1),

2794

frozenset((token_end, )))

2168

frozenset((token_end,)))

2795

2169

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

2796

2170

datetime.timedelta(minutes=1),

2797

2171

frozenset((token_second, token_end)))

2813

2187

frozenset((token_month, token_end)))

2814

2188

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

2815

2189

datetime.timedelta(weeks=1),

2816

frozenset((token_end, )))

2190

frozenset((token_end,)))

2817

2191

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

2818

2192

frozenset((token_year, token_month,

2819

2193

token_day, token_time,

2820

2194

token_week)))

2821

# Define starting values:

2822

# Value so far

2823

value = datetime.timedelta()

2195

# Define starting values

2196

value = datetime.timedelta() # Value so far

2824

2197

found_token = None

2825

# Following valid tokens

2826

followers = frozenset((token_duration, ))

2827

# String left to parse

2828

s = duration

2198

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

2199

s = duration # String left to parse

2829

2200

# Loop until end token is found

2830

2201

while found_token is not token_end:

2831

2202

# Search for any currently valid tokens

2847

2218

break

2848

2219

else:

2849

2220

# No currently valid tokens were found

2850

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

2851

.format(duration))

2221

raise ValueError("Invalid RFC 3339 duration")

2852

2222

# End token found

2853

2223

return value

2854

2224

2855

2225

2856

2226

def string_to_delta(interval):

2857

2227

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

2858

2228

2859

2229

>>> string_to_delta('7d')

2860

2230

datetime.timedelta(7)

2861

2231

>>> string_to_delta('60s')

2869

2239

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

2870

2240

datetime.timedelta(0, 330)

2871

2241

"""

2872

2242

2873

2243

try:

2874

2244

return rfc3339_duration_to_delta(interval)

2875

2245

except ValueError:

2876

2246

pass

2877

2247

2878

2248

timevalue = datetime.timedelta(0)

2879

2249

for s in interval.split():

2880

2250

try:

2891

2261

elif suffix == "w":

2892

2262

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

2893

2263

else:

2894

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

2264

raise ValueError("Unknown suffix {!r}"

2265

.format(suffix))

2895

2266

except IndexError as e:

2896

2267

raise ValueError(*(e.args))

2897

2268

timevalue += delta

2898

2269

return timevalue

2899

2270

2900

2271

2901

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

2272

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

2902

2273

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

2903

2274

2904

2275

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

2905

2276

if os.fork():

2906

2277

sys.exit()

2913

2284

# Close all standard open file descriptors

2914

2285

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

2915

2286

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

2916

raise OSError(errno.ENODEV,

2917

"{} not a character device"

2287

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

2918

2288

.format(os.devnull))

2919

2289

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

2920

2290

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

2924

2294

2925

2295

2926

2296

def main():

2927

2297

2928

2298

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

2929

2299

# Parsing of options, both command line and config file

2930

2300

2931

2301

parser = argparse.ArgumentParser()

2932

2302

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

2933

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

2303

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

2934

2304

help="show version number and exit")

2935

2305

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

2936

2306

help="Bind to interface IF")

2972

2342

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

2973

2343

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

2974

2344

default=None)

2975

2345

2976

2346

options = parser.parse_args()

2977

2347

2978

2348

if options.check:

2979

2349

import doctest

2980

2350

fail_count, test_count = doctest.testmod()

2981

2351

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

2982

2352

2983

2353

# Default values for config file for server-global settings

2984

if gnutls.has_rawpk:

2985

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

2986

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

2987

else:

2988

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

2989

":+SIGN-DSA-SHA256")

2990

server_defaults = {"interface": "",

2991

"address": "",

2992

"port": "",

2993

"debug": "False",

2994

"priority": priority,

2995

"servicename": "Mandos",

2996

"use_dbus": "True",

2997

"use_ipv6": "True",

2998

"debuglevel": "",

2999

"restore": "True",

3000

"socket": "",

3001

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

3002

"foreground": "False",

3003

"zeroconf": "True",

3004

}

3005

del priority

3006

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

3007

2371

# Parse config file for server-global settings

3008

server_config = configparser.ConfigParser(server_defaults)

2372

server_config = configparser.SafeConfigParser(server_defaults)

3009

2373

del server_defaults

3010

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

3011

# 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

3012

2377

server_settings = server_config.defaults()

3013

2378

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

3014

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

3015

"foreground", "zeroconf"):

2379

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

3016

2380

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

3017

2381

option)

3018

2382

if server_settings["port"]:

3028

2392

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

3029

2393

["socket"])

3030

2394

del server_config

3031

2395

3032

2396

# Override the settings from the config file with command line

3033

2397

# options, if set.

3034

2398

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

3035

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

3036

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

3037

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

2399

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

2400

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

2401

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

3038

2402

value = getattr(options, option)

3039

2403

if value is not None:

3040

2404

server_settings[option] = value

3052

2416

if server_settings["debug"]:

3053

2417

server_settings["foreground"] = True

3054

2418

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

3055

2419

3056

2420

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

3057

3058

if (not server_settings["zeroconf"]

3059

and not (server_settings["port"]

3060

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

3061

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

3062

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

3063

2428

# For convenience

3064

2429

debug = server_settings["debug"]

3065

2430

debuglevel = server_settings["debuglevel"]

3069

2434

stored_state_file)

3070

2435

foreground = server_settings["foreground"]

3071

2436

zeroconf = server_settings["zeroconf"]

3072

2437

3073

2438

if debug:

3074

2439

initlogger(debug, logging.DEBUG)

3075

2440

else:

3078

2443

else:

3079

2444

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

3080

2445

initlogger(debug, level)

3081

2446

3082

2447

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

3083

syslogger.setFormatter(

3084

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

3085

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

3086

server_settings["servicename"])))

3087

2448

syslogger.setFormatter(logging.Formatter

2449

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

2450

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

2451

.format(server_settings

2452

["servicename"])))

2453

3088

2454

# Parse config file with clients

3089

client_config = configparser.ConfigParser(Client.client_defaults)

2455

client_config = configparser.SafeConfigParser(Client

2456

.client_defaults)

3090

2457

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

3091

2458

"clients.conf"))

3092

2459

3093

2460

global mandos_dbus_service

3094

2461

mandos_dbus_service = None

3095

2462

3096

2463

socketfd = None

3097

2464

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

3098

2465

socketfd = server_settings["socket"]

3099

tcp_server = MandosServer(

3100

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

3101

ClientHandler,

3102

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

3103

use_ipv6=use_ipv6,

3104

gnutls_priority=server_settings["priority"],

3105

use_dbus=use_dbus,

3106

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)

3107

2476

if not foreground:

3108

2477

pidfilename = "/run/mandos.pid"

3109

2478

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

3110

2479

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

3111

2480

pidfile = None

3112

2481

try:

3113

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

2482

pidfile = open(pidfilename, "w")

3114

2483

except IOError as e:

3115

2484

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

3116

2485

exc_info=e)

3117

3118

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

3119

("mandos", "mandos"),

3120

("nobody", "nogroup")):

2486

2487

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

3121

2488

try:

3122

2489

uid = pwd.getpwnam(name).pw_uid

3123

gid = pwd.getpwnam(group).pw_gid

2490

gid = pwd.getpwnam(name).pw_gid

3124

2491

break

3125

2492

except KeyError:

3126

2493

continue

3130

2497

try:

3131

2498

os.setgid(gid)

3132

2499

os.setuid(uid)

3133

if debug:

3134

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

3135

gid))

3136

2500

except OSError as error:

3137

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

3138

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

3139

2501

if error.errno != errno.EPERM:

3140

2502

raise

3141

2503

3142

2504

if debug:

3143

2505

# Enable all possible GnuTLS debugging

3144

2506

3145

2507

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

3146

2508

# - GnuTLS manual

3147

gnutls.global_set_log_level(11)

3148

3149

@gnutls.log_func

2509

gnutls.library.functions.gnutls_global_set_log_level(11)

2510

2511

@gnutls.library.types.gnutls_log_func

3150

2512

def debug_gnutls(level, string):

3151

2513

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

3152

3153

gnutls.global_set_log_function(debug_gnutls)

3154

2514

2515

(gnutls.library.functions

2516

.gnutls_global_set_log_function(debug_gnutls))

2517

3155

2518

# Redirect stdin so all checkers get /dev/null

3156

2519

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

3157

2520

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

3158

2521

if null > 2:

3159

2522

os.close(null)

3160

2523

3161

2524

# Need to fork before connecting to D-Bus

3162

2525

if not foreground:

3163

2526

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

3164

2527

daemon()

3165

3166

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

3167

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

3168

# need to inform GLib that threads will be used.

3169

GLib.threads_init()

3170

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

3171

2533

global main_loop

3172

2534

# From the Avahi example code

3173

2535

DBusGMainLoop(set_as_default=True)

3174

main_loop = GLib.MainLoop()

2536

main_loop = gobject.MainLoop()

3175

2537

bus = dbus.SystemBus()

3176

2538

# End of Avahi example code

3177

2539

if use_dbus:

3178

2540

try:

3179

2541

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

3180

bus,

3181

do_not_queue=True)

3182

old_bus_name = dbus.service.BusName(

3183

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

3184

do_not_queue=True)

3185

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:

3186

2547

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

3187

2548

use_dbus = False

3188

2549

server_settings["use_dbus"] = False

3189

2550

tcp_server.use_dbus = False

3190

2551

if zeroconf:

3191

2552

protocol = avahi.PROTO_INET6 if use_ipv6 else avahi.PROTO_INET

3192

service = AvahiServiceToSyslog(

3193

name=server_settings["servicename"],

3194

servicetype="_mandos._tcp",

3195

protocol=protocol,

3196

bus=bus)

2553

service = AvahiServiceToSyslog(name =

2554

server_settings["servicename"],

2555

servicetype = "_mandos._tcp",

2556

protocol = protocol, bus = bus)

3197

2557

if server_settings["interface"]:

3198

service.interface = if_nametoindex(

3199

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

3200

2558

service.interface = (if_nametoindex

2559

(server_settings["interface"]

2560

.encode("utf-8")))

2561

3201

2562

global multiprocessing_manager

3202

2563

multiprocessing_manager = multiprocessing.Manager()

3203

2564

3204

2565

client_class = Client

3205

2566

if use_dbus:

3206

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

3207

2567

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

2568

3208

2569

client_settings = Client.config_parser(client_config)

3209

2570

old_client_settings = {}

3210

2571

clients_data = {}

3211

2572

3212

2573

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

3213

2574

global wnull

3214

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

2575

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

3215

2576

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

3216

2577

# mode

3217

2578

if debug or not foreground:

3218

2579

wnull.close()

3219

2580

3220

2581

# Get client data and settings from last running state.

3221

2582

if server_settings["restore"]:

3222

2583

try:

3223

2584

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

3224

if sys.version_info.major == 2:

3225

clients_data, old_client_settings = pickle.load(

3226

stored_state)

3227

else:

3228

bytes_clients_data, bytes_old_client_settings = (

3229

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

3230

# Fix bytes to strings

3231

# clients_data

3232

# .keys()

3233

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

3234

if isinstance(key, bytes)

3235

else key): value

3236

for key, value in

3237

bytes_clients_data.items()}

3238

del bytes_clients_data

3239

for key in clients_data:

3240

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

3241

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

3242

for k, v in

3243

clients_data[key].items()}

3244

clients_data[key] = value

3245

# .client_structure

3246

value["client_structure"] = [

3247

(s.decode("utf-8")

3248

if isinstance(s, bytes)

3249

else s) for s in

3250

value["client_structure"]]

3251

# .name & .host

3252

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

3253

if isinstance(value[k], bytes):

3254

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

3255

if "key_id" not in value:

3256

value["key_id"] = ""

3257

elif "fingerprint" not in value:

3258

value["fingerprint"] = ""

3259

# old_client_settings

3260

# .keys()

3261

old_client_settings = {

3262

(key.decode("utf-8")

3263

if isinstance(key, bytes)

3264

else key): value

3265

for key, value in

3266

bytes_old_client_settings.items()}

3267

del bytes_old_client_settings

3268

# .host

3269

for value in old_client_settings.values():

3270

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

3271

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

3272

.decode("utf-8"))

2585

clients_data, old_client_settings = (pickle.load

2586

(stored_state))

3273

2587

os.remove(stored_state_path)

3274

2588

except IOError as e:

3275

2589

if e.errno == errno.ENOENT:

3276

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

3277

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

2590

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

2591

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

3278

2592

else:

3279

2593

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

3280

2594

exc_info=e)

3281

2595

raise

3282

2596

except EOFError as e:

3283

2597

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

3284

"EOFError:",

3285

exc_info=e)

3286

2598

"EOFError:", exc_info=e)

2599

3287

2600

with PGPEngine() as pgp:

3288

2601

for client_name, client in clients_data.items():

3289

2602

# Skip removed clients

3290

2603

if client_name not in client_settings:

3291

2604

continue

3292

2605

3293

2606

# Decide which value to use after restoring saved state.

3294

2607

# We have three different values: Old config file,

3295

2608

# new config file, and saved state.

3300

2613

# For each value in new config, check if it

3301

2614

# differs from the old config value (Except for

3302

2615

# the "secret" attribute)

3303

if (name != "secret"

3304

and (value !=

3305

old_client_settings[client_name][name])):

2616

if (name != "secret" and

2617

value != old_client_settings[client_name]

2618

[name]):

3306

2619

client[name] = value

3307

2620

except KeyError:

3308

2621

pass

3309

2622

3310

2623

# Clients who has passed its expire date can still be

3311

# enabled if its last checker was successful. A Client

2624

# enabled if its last checker was successful. Clients

3312

2625

# whose checker succeeded before we stored its state is

3313

2626

# assumed to have successfully run all checkers during

3314

2627

# downtime.

3317

2630

if not client["last_checked_ok"]:

3318

2631

logger.warning(

3319

2632

"disabling client {} - Client never "

3320

"performed a successful checker".format(

3321

client_name))

2633

"performed a successful checker"

2634

.format(client_name))

3322

2635

client["enabled"] = False

3323

2636

elif client["last_checker_status"] != 0:

3324

2637

logger.warning(

3325

2638

"disabling client {} - Client last"

3326

" checker failed with error code"

3327

" {}".format(

3328

client_name,

3329

client["last_checker_status"]))

2639

" checker failed with error code {}"

2640

.format(client_name,

2641

client["last_checker_status"]))

3330

2642

client["enabled"] = False

3331

2643

else:

3332

client["expires"] = (

3333

datetime.datetime.utcnow()

3334

+ client["timeout"])

2644

client["expires"] = (datetime.datetime

2645

.utcnow()

2646

+ client["timeout"])

3335

2647

logger.debug("Last checker succeeded,"

3336

" keeping {} enabled".format(

3337

client_name))

2648

" keeping {} enabled"

2649

.format(client_name))

3338

2650

try:

3339

client["secret"] = pgp.decrypt(

3340

client["encrypted_secret"],

3341

client_settings[client_name]["secret"])

2651

client["secret"] = (

2652

pgp.decrypt(client["encrypted_secret"],

2653

client_settings[client_name]

2654

["secret"]))

3342

2655

except PGPError:

3343

2656

# If decryption fails, we use secret from new settings

3344

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

3345

client_name))

3346

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

3347

["secret"])

3348

2657

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

2658

.format(client_name))

2659

client["secret"] = (

2660

client_settings[client_name]["secret"])

2661

3349

2662

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

3350

2663

for client_name in (set(old_client_settings)

3351

2664

- set(client_settings)):

3353

2666

for client_name in (set(client_settings)

3354

2667

- set(old_client_settings)):

3355

2668

clients_data[client_name] = client_settings[client_name]

3356

2669

3357

2670

# Create all client objects

3358

2671

for client_name, client in clients_data.items():

3359

2672

tcp_server.clients[client_name] = client_class(

3360

name=client_name,

3361

settings=client,

3362

server_settings=server_settings)

3363

2673

name = client_name, settings = client,

2674

server_settings = server_settings)

2675

3364

2676

if not tcp_server.clients:

3365

2677

logger.warning("No clients defined")

3366

2678

3367

2679

if not foreground:

3368

2680

if pidfile is not None:

3369

pid = os.getpid()

3370

2681

try:

3371

2682

with pidfile:

3372

print(pid, file=pidfile)

2683

pid = os.getpid()

2684

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

3373

2685

except IOError:

3374

2686

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

3375

2687

pidfilename, pid)

3376

2688

del pidfile

3377

2689

del pidfilename

3378

3379

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

3380

GLib.unix_signal_add(GLib.PRIORITY_HIGH, termsig,

3381

lambda: main_loop.quit() and False)

3382

2690

2691

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

2692

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

2693

3383

2694

if use_dbus:

3384

3385

@alternate_dbus_interfaces(

3386

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

3387

class MandosDBusService(DBusObjectWithObjectManager):

2695

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

2696

"se.bsnet.fukt.Mandos"})

2697

class MandosDBusService(DBusObjectWithProperties):

3388

2698

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

3389

3390

2699

def __init__(self):

3391

2700

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

3392

3393

2701

_interface = "se.recompile.Mandos"

3394

2702

2703

@dbus_interface_annotations(_interface)

2704

def _foo(self):

2705

return { "org.freedesktop.DBus.Property"

2706

".EmitsChangedSignal":

2707

"false"}

2708

3395

2709

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

3396

2710

def ClientAdded(self, objpath):

3397

2711

"D-Bus signal"

3398

2712

pass

3399

2713

3400

2714

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

3401

def ClientNotFound(self, key_id, address):

2715

def ClientNotFound(self, fingerprint, address):

3402

2716

"D-Bus signal"

3403

2717

pass

3404

3405

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

3406

"true"})

2718

3407

2719

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

3408

2720

def ClientRemoved(self, objpath, name):

3409

2721

"D-Bus signal"

3410

2722

pass

3411

3412

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

3413

"true"})

2723

3414

2724

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

3415

2725

def GetAllClients(self):

3416

2726

"D-Bus method"

3417

return dbus.Array(c.dbus_object_path for c in

3418

tcp_server.clients.values())

3419

3420

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

3421

"true"})

2727

return dbus.Array(c.dbus_object_path

2728

for c in

2729

tcp_server.clients.itervalues())

2730

3422

2731

@dbus.service.method(_interface,

3423

2732

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

3424

2733

def GetAllClientsWithProperties(self):

3425

2734

"D-Bus method"

3426

2735

return dbus.Dictionary(

3427

{c.dbus_object_path: c.GetAll(

3428

"se.recompile.Mandos.Client")

3429

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

2736

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

2737

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

3430

2738

signature="oa{sv}")

3431

2739

3432

2740

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

3433

2741

def RemoveClient(self, object_path):

3434

2742

"D-Bus method"

3435

for c in tcp_server.clients.values():

2743

for c in tcp_server.clients.itervalues():

3436

2744

if c.dbus_object_path == object_path:

3437

2745

del tcp_server.clients[c.name]

3438

2746

c.remove_from_connection()

3439

# Don't signal the disabling

2747

# Don't signal anything except ClientRemoved

3440

2748

c.disable(quiet=True)

3441

# Emit D-Bus signal for removal

3442

self.client_removed_signal(c)

2749

# Emit D-Bus signal

2750

self.ClientRemoved(object_path, c.name)

3443

2751

return

3444

2752

raise KeyError(object_path)

3445

2753

3446

2754

del _interface

3447

3448

@dbus.service.method(dbus.OBJECT_MANAGER_IFACE,

3449

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

3450

def GetManagedObjects(self):

3451

"""D-Bus method"""

3452

return dbus.Dictionary(

3453

{client.dbus_object_path:

3454

dbus.Dictionary(

3455

{interface: client.GetAll(interface)

3456

for interface in

3457

client._get_all_interface_names()})

3458

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

3459

3460

def client_added_signal(self, client):

3461

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

3462

if use_dbus:

3463

# New standard signal

3464

self.InterfacesAdded(

3465

client.dbus_object_path,

3466

dbus.Dictionary(

3467

{interface: client.GetAll(interface)

3468

for interface in

3469

client._get_all_interface_names()}))

3470

# Old signal

3471

self.ClientAdded(client.dbus_object_path)

3472

3473

def client_removed_signal(self, client):

3474

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

3475

if use_dbus:

3476

# New standard signal

3477

self.InterfacesRemoved(

3478

client.dbus_object_path,

3479

client._get_all_interface_names())

3480

# Old signal

3481

self.ClientRemoved(client.dbus_object_path,

3482

client.name)

3483

2755

3484

2756

mandos_dbus_service = MandosDBusService()

3485

3486

# Save modules to variables to exempt the modules from being

3487

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

3488

mp = multiprocessing

3489

wn = wnull

3490

2757

3491

2758

def cleanup():

3492

2759

"Cleanup function; run on exit"

3493

2760

if zeroconf:

3494

2761

service.cleanup()

3495

3496

mp.active_children()

3497

wn.close()

2762

2763

multiprocessing.active_children()

2764

wnull.close()

3498

2765

if not (tcp_server.clients or client_settings):

3499

2766

return

3500

2767

3501

2768

# Store client before exiting. Secrets are encrypted with key

3502

2769

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

3503

2770

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

3504

2771

clients = {}

3505

2772

with PGPEngine() as pgp:

3506

for client in tcp_server.clients.values():

2773

for client in tcp_server.clients.itervalues():

3507

2774

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

3508

2775

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

3509

2776

key)

3510

2777

client_dict = {}

3511

2778

3512

2779

# A list of attributes that can not be pickled

3513

2780

# + secret.

3514

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

3515

"checker", "server_settings"}

3516

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

3517

.Object):

2781

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

2782

"checker", "server_settings" }

2783

for name, typ in (inspect.getmembers

2784

(dbus.service.Object)):

3518

2785

exclude.add(name)

3519

2786

3520

2787

client_dict["encrypted_secret"] = (client

3521

2788

.encrypted_secret)

3522

2789

for attr in client.client_structure:

3523

2790

if attr not in exclude:

3524

2791

client_dict[attr] = getattr(client, attr)

3525

2792

3526

2793

clients[client.name] = client_dict

3527

2794

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

3528

2795

3529

2796

try:

3530

with tempfile.NamedTemporaryFile(

3531

mode='wb',

3532

suffix=".pickle",

3533

prefix='clients-',

3534

dir=os.path.dirname(stored_state_path),

3535

delete=False) as stored_state:

3536

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

3537

protocol=2)

3538

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

3539

2803

os.rename(tempname, stored_state_path)

3540

2804

except (IOError, OSError) as e:

3541

2805

if not debug:

3550

2814

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

3551

2815

exc_info=e)

3552

2816

raise

3553

2817

3554

2818

# Delete all clients, and settings from config

3555

2819

while tcp_server.clients:

3556

2820

name, client = tcp_server.clients.popitem()

3557

2821

if use_dbus:

3558

2822

client.remove_from_connection()

3559

# Don't signal the disabling

2823

# Don't signal anything except ClientRemoved

3560

2824

client.disable(quiet=True)

3561

# Emit D-Bus signal for removal

3562

2825

if use_dbus:

3563

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)

3564

2830

client_settings.clear()

3565

2831

3566

2832

atexit.register(cleanup)

3567

3568

for client in tcp_server.clients.values():

2833

2834

for client in tcp_server.clients.itervalues():

3569

2835

if use_dbus:

3570

# Emit D-Bus signal for adding

3571

mandos_dbus_service.client_added_signal(client)

2836

# Emit D-Bus signal

2837

mandos_dbus_service.ClientAdded(client.dbus_object_path)

3572

2838

# Need to initiate checking of clients

3573

2839

if client.enabled:

3574

2840

client.init_checker()

3575

2841

3576

2842

tcp_server.enable()

3577

2843

tcp_server.server_activate()

3578

2844

3579

2845

# Find out what port we got

3580

2846

if zeroconf:

3581

2847

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

3586

2852

else: # IPv4

3587

2853

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

3588

2854

*tcp_server.socket.getsockname())

3589

3590

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

3591

2855

2856

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

2857

3592

2858

try:

3593

2859

if zeroconf:

3594

2860

# From the Avahi example code

3599

2865

cleanup()

3600

2866

sys.exit(1)

3601

2867

# End of Avahi example code

3602

3603

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

3604

lambda *args, **kwargs:

3605

(tcp_server.handle_request

3606

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

3607

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

3608

2874

logger.debug("Starting main loop")

3609

2875

main_loop.run()

3610

2876

except AvahiError as error:

3619

2885

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

3620

2886

cleanup()

3621

2887

3622

3623

2888

if __name__ == '__main__':

3624

2889

main()