/mandos/trunk : revision 659

1

#!/usr/bin/python

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

#

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

19

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

23

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

24

# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the

25

# GNU General Public License for more details.

26

#

26

#

27

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

28

# along with this program. If not, see

29

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

30

#

30

#

31

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

32

#

32

#

33

34

from __future__ import (division, absolute_import, print_function,

35

unicode_literals)

36

37

try:

38

from future_builtins import *

39

except ImportError:

40

pass

37

from future_builtins import *

41

38

42

try:

43

import SocketServer as socketserver

44

except ImportError:

45

import socketserver

39

import SocketServer as socketserver

46

40

import socket

47

41

import argparse

48

42

import datetime

49

43

import errno

50

try:

51

import ConfigParser as configparser

52

except ImportError:

53

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

54

51

import sys

55

52

import re

56

53

import os

65

62

import struct

66

63

import fcntl

67

64

import functools

68

try:

69

import cPickle as pickle

70

except ImportError:

71

import pickle

65

import cPickle as pickle

72

66

import multiprocessing

73

67

import types

74

68

import binascii

75

69

import tempfile

76

70

import itertools

77

71

import collections

78

import codecs

79

72

80

73

import dbus

81

74

import dbus.service

82

from gi.repository import GLib

75

import gobject

76

import avahi

83

77

from dbus.mainloop.glib import DBusGMainLoop

84

78

import ctypes

85

79

import ctypes.util

86

80

import xml.dom.minidom

87

81

import inspect

88

82

89

# Try to find the value of SO_BINDTODEVICE:

90

83

try:

91

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

92

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

93

84

SO_BINDTODEVICE = socket.SO_BINDTODEVICE

94

85

except AttributeError:

95

86

try:

96

# This is where SO_BINDTODEVICE was up to and including Python

97

# 2.6, and also 3.2:

98

87

from IN import SO_BINDTODEVICE

99

88

except ImportError:

100

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

101

# Try running the C preprocessor:

102

try:

103

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

104

"/dev/stdin"],

105

stdin=subprocess.PIPE,

106

stdout=subprocess.PIPE)

107

stdout = cc.communicate(

108

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

109

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

110

except (OSError, ValueError, IndexError):

111

# No value found

112

SO_BINDTODEVICE = None

113

114

if sys.version_info.major == 2:

115

str = unicode

116

117

version = "1.7.14"

89

SO_BINDTODEVICE = None

90

91

version = "1.6.4"

118

92

stored_state_file = "clients.pickle"

119

93

120

94

logger = logging.getLogger()

121

95

syslogger = None

122

96

123

97

try:

124

if_nametoindex = ctypes.cdll.LoadLibrary(

125

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

98

if_nametoindex = (ctypes.cdll.LoadLibrary

99

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

100

.if_nametoindex)

126

101

except (OSError, AttributeError):

127

128

102

def if_nametoindex(interface):

129

103

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

130

104

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

131

105

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

132

106

ifreq = fcntl.ioctl(s, SIOCGIFINDEX,

133

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

134

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

107

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

108

interface))

109

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

110

ifreq[16:20])[0]

135

111

return interface_index

136

112

137

113

138

def copy_function(func):

139

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

140

if sys.version_info.major == 2:

141

return types.FunctionType(func.func_code,

142

func.func_globals,

143

func.func_name,

144

func.func_defaults,

145

func.func_closure)

146

else:

147

return types.FunctionType(func.__code__,

148

func.__globals__,

149

func.__name__,

150

func.__defaults__,

151

func.__closure__)

152

153

154

114

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

155

115

"""init logger and add loglevel"""

156

157

global syslogger

158

syslogger = (logging.handlers.SysLogHandler(

159

facility=logging.handlers.SysLogHandler.LOG_DAEMON,

160

address="/dev/log"))

116

117

syslogger = (logging.handlers.SysLogHandler

118

(facility =

119

logging.handlers.SysLogHandler.LOG_DAEMON,

120

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

161

121

syslogger.setFormatter(logging.Formatter

162

122

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

163

123

' %(message)s'))

164

124

logger.addHandler(syslogger)

165

125

166

126

if debug:

167

127

console = logging.StreamHandler()

168

128

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

180

140

181

141

class PGPEngine(object):

182

142

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

183

184

143

def __init__(self):

185

144

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

186

self.gpg = "gpg"

187

try:

188

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

189

for line in output.splitlines():

190

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

191

if name == "gpg":

192

self.gpg = path

193

break

194

except OSError as e:

195

if e.errno != errno.ENOENT:

196

raise

197

145

self.gnupgargs = ['--batch',

198

'--homedir', self.tempdir,

146

'--home', self.tempdir,

199

147

'--force-mdc',

200

'--quiet']

201

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

202

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

203

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

204

148

'--quiet',

149

'--no-use-agent']

150

205

151

def __enter__(self):

206

152

return self

207

153

208

154

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

209

155

self._cleanup()

210

156

return False

211

157

212

158

def __del__(self):

213

159

self._cleanup()

214

160

215

161

def _cleanup(self):

216

162

if self.tempdir is not None:

217

163

# Delete contents of tempdir

218

164

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

219

topdown=False):

165

topdown = False):

220

166

for filename in files:

221

167

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

222

168

for dirname in dirs:

224

170

# Remove tempdir

225

171

os.rmdir(self.tempdir)

226

172

self.tempdir = None

227

173

228

174

def password_encode(self, password):

229

175

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

230

176

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

235

181

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

236

182

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

237

183

return encoded

238

184

239

185

def encrypt(self, data, password):

240

186

passphrase = self.password_encode(password)

241

with tempfile.NamedTemporaryFile(

242

dir=self.tempdir) as passfile:

187

with tempfile.NamedTemporaryFile(dir=self.tempdir

188

) as passfile:

243

189

passfile.write(passphrase)

244

190

passfile.flush()

245

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

191

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

246

192

'--passphrase-file',

247

193

passfile.name]

248

194

+ self.gnupgargs,

249

stdin=subprocess.PIPE,

250

stdout=subprocess.PIPE,

251

stderr=subprocess.PIPE)

252

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

195

stdin = subprocess.PIPE,

196

stdout = subprocess.PIPE,

197

stderr = subprocess.PIPE)

198

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

253

199

if proc.returncode != 0:

254

200

raise PGPError(err)

255

201

return ciphertext

256

202

257

203

def decrypt(self, data, password):

258

204

passphrase = self.password_encode(password)

259

with tempfile.NamedTemporaryFile(

260

dir=self.tempdir) as passfile:

205

with tempfile.NamedTemporaryFile(dir = self.tempdir

206

) as passfile:

261

207

passfile.write(passphrase)

262

208

passfile.flush()

263

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

209

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

264

210

'--passphrase-file',

265

211

passfile.name]

266

212

+ self.gnupgargs,

267

stdin=subprocess.PIPE,

268

stdout=subprocess.PIPE,

269

stderr=subprocess.PIPE)

270

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

213

stdin = subprocess.PIPE,

214

stdout = subprocess.PIPE,

215

stderr = subprocess.PIPE)

216

decrypted_plaintext, err = proc.communicate(input

217

= data)

271

218

if proc.returncode != 0:

272

219

raise PGPError(err)

273

220

return decrypted_plaintext

274

221

275

222

276

# Pretend that we have an Avahi module

277

class Avahi(object):

278

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

279

It is instantiated once, and simulates having an Avahi module."""

280

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

281

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

282

PROTO_INET = 0 # avahi-common/address.h

283

PROTO_INET6 = 1 # avahi-common/address.h

284

DBUS_NAME = "org.freedesktop.Avahi"

285

DBUS_INTERFACE_ENTRY_GROUP = DBUS_NAME + ".EntryGroup"

286

DBUS_INTERFACE_SERVER = DBUS_NAME + ".Server"

287

DBUS_PATH_SERVER = "/"

288

289

def string_array_to_txt_array(self, t):

290

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

291

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

292

ENTRY_GROUP_ESTABLISHED = 2 # avahi-common/defs.h

293

ENTRY_GROUP_COLLISION = 3 # avahi-common/defs.h

294

ENTRY_GROUP_FAILURE = 4 # avahi-common/defs.h

295

SERVER_INVALID = 0 # avahi-common/defs.h

296

SERVER_REGISTERING = 1 # avahi-common/defs.h

297

SERVER_RUNNING = 2 # avahi-common/defs.h

298

SERVER_COLLISION = 3 # avahi-common/defs.h

299

SERVER_FAILURE = 4 # avahi-common/defs.h

300

avahi = Avahi()

301

302

303

223

class AvahiError(Exception):

304

224

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

305

225

self.value = value

306

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

307

**kwargs)

308

226

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

227

def __unicode__(self):

228

return unicode(repr(self.value))

309

229

310

230

class AvahiServiceError(AvahiError):

311

231

pass

312

232

313

314

233

class AvahiGroupError(AvahiError):

315

234

pass

316

235

317

236

318

237

class AvahiService(object):

319

238

"""An Avahi (Zeroconf) service.

320

239

321

240

Attributes:

322

241

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

323

242

Used to optionally bind to the specified interface.

335

254

server: D-Bus Server

336

255

bus: dbus.SystemBus()

337

256

"""

338

339

def __init__(self,

340

interface=avahi.IF_UNSPEC,

341

name=None,

342

servicetype=None,

343

port=None,

344

TXT=None,

345

domain="",

346

host="",

347

max_renames=32768,

348

protocol=avahi.PROTO_UNSPEC,

349

bus=None):

257

258

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

259

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

260

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

261

protocol = avahi.PROTO_UNSPEC, bus = None):

350

262

self.interface = interface

351

263

self.name = name

352

264

self.type = servicetype

361

273

self.server = None

362

274

self.bus = bus

363

275

self.entry_group_state_changed_match = None

364

365

def rename(self, remove=True):

276

277

def rename(self):

366

278

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

367

279

if self.rename_count >= self.max_renames:

368

280

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

369

281

" after %i retries, exiting.",

370

282

self.rename_count)

371

283

raise AvahiServiceError("Too many renames")

372

self.name = str(

373

self.server.GetAlternativeServiceName(self.name))

374

self.rename_count += 1

284

self.name = unicode(self.server

285

.GetAlternativeServiceName(self.name))

375

286

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

376

287

self.name)

377

if remove:

378

self.remove()

288

self.remove()

379

289

try:

380

290

self.add()

381

291

except dbus.exceptions.DBusException as error:

382

if (error.get_dbus_name()

383

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

384

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

385

return self.rename(remove=False)

386

else:

387

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

388

self.cleanup()

389

os._exit(1)

390

292

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

293

self.cleanup()

294

os._exit(1)

295

self.rename_count += 1

296

391

297

def remove(self):

392

298

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

393

299

if self.entry_group_state_changed_match is not None:

395

301

self.entry_group_state_changed_match = None

396

302

if self.group is not None:

397

303

self.group.Reset()

398

304

399

305

def add(self):

400

306

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

401

307

self.remove()

418

324

dbus.UInt16(self.port),

419

325

avahi.string_array_to_txt_array(self.TXT))

420

326

self.group.Commit()

421

327

422

328

def entry_group_state_changed(self, state, error):

423

329

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

424

330

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

425

331

426

332

if state == avahi.ENTRY_GROUP_ESTABLISHED:

427

333

logger.debug("Zeroconf service established.")

428

334

elif state == avahi.ENTRY_GROUP_COLLISION:

430

336

self.rename()

431

337

elif state == avahi.ENTRY_GROUP_FAILURE:

432

338

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

433

str(error))

434

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

435

339

unicode(error))

340

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

341

.format(error))

342

436

343

def cleanup(self):

437

344

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

438

345

if self.group is not None:

443

350

pass

444

351

self.group = None

445

352

self.remove()

446

353

447

354

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

448

355

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

449

356

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

450

bad_states = {

451

avahi.SERVER_INVALID: "Zeroconf server invalid",

452

avahi.SERVER_REGISTERING: None,

453

avahi.SERVER_COLLISION: "Zeroconf server name collision",

454

avahi.SERVER_FAILURE: "Zeroconf server failure",

455

}

357

bad_states = { avahi.SERVER_INVALID:

358

"Zeroconf server invalid",

359

avahi.SERVER_REGISTERING: None,

360

avahi.SERVER_COLLISION:

361

"Zeroconf server name collision",

362

avahi.SERVER_FAILURE:

363

"Zeroconf server failure" }

456

364

if state in bad_states:

457

365

if bad_states[state] is not None:

458

366

if error is None:

461

369

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

462

370

self.cleanup()

463

371

elif state == avahi.SERVER_RUNNING:

464

try:

465

self.add()

466

except dbus.exceptions.DBusException as error:

467

if (error.get_dbus_name()

468

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

469

logger.info("Local Zeroconf service name"

470

" collision.")

471

return self.rename(remove=False)

472

else:

473

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

474

self.cleanup()

475

os._exit(1)

372

self.add()

476

373

else:

477

374

if error is None:

478

375

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

479

376

else:

480

377

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

481

378

482

379

def activate(self):

483

380

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

484

381

if self.server is None:

488

385

follow_name_owner_changes=True),

489

386

avahi.DBUS_INTERFACE_SERVER)

490

387

self.server.connect_to_signal("StateChanged",

491

self.server_state_changed)

388

self.server_state_changed)

492

389

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

493

390

494

391

495

392

class AvahiServiceToSyslog(AvahiService):

496

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

393

def rename(self):

497

394

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

498

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

499

syslogger.setFormatter(logging.Formatter(

500

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

501

.format(self.name)))

395

ret = AvahiService.rename(self)

396

syslogger.setFormatter(logging.Formatter

397

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

398

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

399

.format(self.name)))

502

400

return ret

503

401

504

402

505

# Pretend that we have a GnuTLS module

506

class GnuTLS(object):

507

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

508

It is instantiated once, and simulates having a GnuTLS module."""

509

510

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

511

if library is None:

512

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

513

_library = ctypes.cdll.LoadLibrary(library)

514

del library

515

_need_version = b"3.3.0"

516

517

def __init__(self):

518

# Need to use "self" here, since this method is called before

519

# the assignment to the "gnutls" global variable happens.

520

if self.check_version(self._need_version) is None:

521

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

522

.format(self._need_version))

523

524

# Unless otherwise indicated, the constants and types below are

525

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

526

527

# Constants

528

E_SUCCESS = 0

529

E_INTERRUPTED = -52

530

E_AGAIN = -28

531

CRT_OPENPGP = 2

532

CLIENT = 2

533

SHUT_RDWR = 0

534

CRD_CERTIFICATE = 1

535

E_NO_CERTIFICATE_FOUND = -49

536

OPENPGP_FMT_RAW = 0 # gnutls/openpgp.h

537

538

# Types

539

class session_int(ctypes.Structure):

540

_fields_ = []

541

session_t = ctypes.POINTER(session_int)

542

543

class certificate_credentials_st(ctypes.Structure):

544

_fields_ = []

545

certificate_credentials_t = ctypes.POINTER(

546

certificate_credentials_st)

547

certificate_type_t = ctypes.c_int

548

549

class datum_t(ctypes.Structure):

550

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

551

('size', ctypes.c_uint)]

552

553

class openpgp_crt_int(ctypes.Structure):

554

_fields_ = []

555

openpgp_crt_t = ctypes.POINTER(openpgp_crt_int)

556

openpgp_crt_fmt_t = ctypes.c_int # gnutls/openpgp.h

557

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

558

credentials_type_t = ctypes.c_int

559

transport_ptr_t = ctypes.c_void_p

560

close_request_t = ctypes.c_int

561

562

# Exceptions

563

class Error(Exception):

564

# We need to use the class name "GnuTLS" here, since this

565

# exception might be raised from within GnuTLS.__init__,

566

# which is called before the assignment to the "gnutls"

567

# global variable has happened.

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(object):

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(object):

593

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

594

self._c_object = gnutls.session_t()

595

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

596

gnutls.set_default_priority(self._c_object)

597

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

598

gnutls.handshake_set_private_extensions(self._c_object,

599

True)

600

self.socket = socket

601

if credentials is None:

602

credentials = gnutls.Credentials()

603

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

604

ctypes.cast(credentials._c_object,

605

ctypes.c_void_p))

606

self.credentials = credentials

607

608

def __del__(self):

609

gnutls.deinit(self._c_object)

610

611

def handshake(self):

612

return gnutls.handshake(self._c_object)

613

614

def send(self, data):

615

data = bytes(data)

616

data_len = len(data)

617

while data_len > 0:

618

data_len -= gnutls.record_send(self._c_object,

619

data[-data_len:],

620

data_len)

621

622

def bye(self):

623

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

624

625

# Error handling functions

626

def _error_code(result):

627

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

628

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

629

if result >= 0:

630

return result

631

if result == gnutls.E_NO_CERTIFICATE_FOUND:

632

raise gnutls.CertificateSecurityError(code=result)

633

raise gnutls.Error(code=result)

634

635

def _retry_on_error(result, func, arguments):

636

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

637

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

638

while result < 0:

639

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

640

return _error_code(result)

641

result = func(*arguments)

642

return result

643

644

# Unless otherwise indicated, the function declarations below are

645

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

646

647

# Functions

648

priority_set_direct = _library.gnutls_priority_set_direct

649

priority_set_direct.argtypes = [session_t, ctypes.c_char_p,

650

ctypes.POINTER(ctypes.c_char_p)]

651

priority_set_direct.restype = _error_code

652

653

init = _library.gnutls_init

654

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

655

init.restype = _error_code

656

657

set_default_priority = _library.gnutls_set_default_priority

658

set_default_priority.argtypes = [session_t]

659

set_default_priority.restype = _error_code

660

661

record_send = _library.gnutls_record_send

662

record_send.argtypes = [session_t, ctypes.c_void_p,

663

ctypes.c_size_t]

664

record_send.restype = ctypes.c_ssize_t

665

record_send.errcheck = _retry_on_error

666

667

certificate_allocate_credentials = (

668

_library.gnutls_certificate_allocate_credentials)

669

certificate_allocate_credentials.argtypes = [

670

ctypes.POINTER(certificate_credentials_t)]

671

certificate_allocate_credentials.restype = _error_code

672

673

certificate_free_credentials = (

674

_library.gnutls_certificate_free_credentials)

675

certificate_free_credentials.argtypes = [

676

certificate_credentials_t]

677

certificate_free_credentials.restype = None

678

679

handshake_set_private_extensions = (

680

_library.gnutls_handshake_set_private_extensions)

681

handshake_set_private_extensions.argtypes = [session_t,

682

ctypes.c_int]

683

handshake_set_private_extensions.restype = None

684

685

credentials_set = _library.gnutls_credentials_set

686

credentials_set.argtypes = [session_t, credentials_type_t,

687

ctypes.c_void_p]

688

credentials_set.restype = _error_code

689

690

strerror = _library.gnutls_strerror

691

strerror.argtypes = [ctypes.c_int]

692

strerror.restype = ctypes.c_char_p

693

694

certificate_type_get = _library.gnutls_certificate_type_get

695

certificate_type_get.argtypes = [session_t]

696

certificate_type_get.restype = _error_code

697

698

certificate_get_peers = _library.gnutls_certificate_get_peers

699

certificate_get_peers.argtypes = [session_t,

700

ctypes.POINTER(ctypes.c_uint)]

701

certificate_get_peers.restype = ctypes.POINTER(datum_t)

702

703

global_set_log_level = _library.gnutls_global_set_log_level

704

global_set_log_level.argtypes = [ctypes.c_int]

705

global_set_log_level.restype = None

706

707

global_set_log_function = _library.gnutls_global_set_log_function

708

global_set_log_function.argtypes = [log_func]

709

global_set_log_function.restype = None

710

711

deinit = _library.gnutls_deinit

712

deinit.argtypes = [session_t]

713

deinit.restype = None

714

715

handshake = _library.gnutls_handshake

716

handshake.argtypes = [session_t]

717

handshake.restype = _error_code

718

handshake.errcheck = _retry_on_error

719

720

transport_set_ptr = _library.gnutls_transport_set_ptr

721

transport_set_ptr.argtypes = [session_t, transport_ptr_t]

722

transport_set_ptr.restype = None

723

724

bye = _library.gnutls_bye

725

bye.argtypes = [session_t, close_request_t]

726

bye.restype = _error_code

727

bye.errcheck = _retry_on_error

728

729

check_version = _library.gnutls_check_version

730

check_version.argtypes = [ctypes.c_char_p]

731

check_version.restype = ctypes.c_char_p

732

733

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

734

735

openpgp_crt_init = _library.gnutls_openpgp_crt_init

736

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

737

openpgp_crt_init.restype = _error_code

738

739

openpgp_crt_import = _library.gnutls_openpgp_crt_import

740

openpgp_crt_import.argtypes = [openpgp_crt_t,

741

ctypes.POINTER(datum_t),

742

openpgp_crt_fmt_t]

743

openpgp_crt_import.restype = _error_code

744

745

openpgp_crt_verify_self = _library.gnutls_openpgp_crt_verify_self

746

openpgp_crt_verify_self.argtypes = [openpgp_crt_t, ctypes.c_uint,

747

ctypes.POINTER(ctypes.c_uint)]

748

openpgp_crt_verify_self.restype = _error_code

749

750

openpgp_crt_deinit = _library.gnutls_openpgp_crt_deinit

751

openpgp_crt_deinit.argtypes = [openpgp_crt_t]

752

openpgp_crt_deinit.restype = None

753

754

openpgp_crt_get_fingerprint = (

755

_library.gnutls_openpgp_crt_get_fingerprint)

756

openpgp_crt_get_fingerprint.argtypes = [openpgp_crt_t,

757

ctypes.c_void_p,

758

ctypes.POINTER(

759

ctypes.c_size_t)]

760

openpgp_crt_get_fingerprint.restype = _error_code

761

762

# Remove non-public functions

763

del _error_code, _retry_on_error

764

# Create the global "gnutls" object, simulating a module

765

gnutls = GnuTLS()

766

767

768

def call_pipe(connection, # : multiprocessing.Connection

769

func, *args, **kwargs):

770

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

771

772

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

773

return value on the provided multiprocessing.Connection.

774

"""

775

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

776

connection.close()

403

def timedelta_to_milliseconds(td):

404

"Convert a datetime.timedelta() to milliseconds"

405

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

406

+ (td.seconds * 1000)

407

+ (td.microseconds // 1000))

777

408

778

409

779

410

class Client(object):

780

411

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

781

412

782

413

Attributes:

783

414

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

784

415

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

786

417

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

787

418

to see if the client lives.

788

419

'None' if no process is running.

789

checker_callback_tag: a GLib event source tag, or None

420

checker_callback_tag: a gobject event source tag, or None

790

421

checker_command: string; External command which is run to check

791

422

if client lives. %() expansions are done at

792

423

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

793

424

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

794

checker_initiator_tag: a GLib event source tag, or None

425

checker_initiator_tag: a gobject event source tag, or None

795

426

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

796

427

client_structure: Object describing what attributes a client has

797

428

and is used for storing the client at exit

798

429

current_checker_command: string; current running checker_command

799

disable_initiator_tag: a GLib event source tag, or None

430

disable_initiator_tag: a gobject event source tag, or None

800

431

enabled: bool()

801

432

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

802

433

uniquely identify the client

807

438

last_checker_status: integer between 0 and 255 reflecting exit

808

439

status of last checker. -1 reflects crashed

809

440

checker, -2 means no checker completed yet.

810

last_checker_signal: The signal which killed the last checker, if

811

last_checker_status is -1

812

441

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

813

442

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

814

443

D-Bus identifiers

821

450

disabled, or None

822

451

server_settings: The server_settings dict from main()

823

452

"""

824

453

825

454

runtime_expansions = ("approval_delay", "approval_duration",

826

455

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

827

456

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

828

457

"last_approval_request", "last_checked_ok",

829

458

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

830

client_defaults = {

831

"timeout": "PT5M",

832

"extended_timeout": "PT15M",

833

"interval": "PT2M",

834

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

835

"host": "",

836

"approval_delay": "PT0S",

837

"approval_duration": "PT1S",

838

"approved_by_default": "True",

839

"enabled": "True",

840

}

841

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

470

def timeout_milliseconds(self):

471

"Return the 'timeout' attribute in milliseconds"

472

return timedelta_to_milliseconds(self.timeout)

473

474

def extended_timeout_milliseconds(self):

475

"Return the 'extended_timeout' attribute in milliseconds"

476

return timedelta_to_milliseconds(self.extended_timeout)

477

478

def interval_milliseconds(self):

479

"Return the 'interval' attribute in milliseconds"

480

return timedelta_to_milliseconds(self.interval)

481

482

def approval_delay_milliseconds(self):

483

return timedelta_to_milliseconds(self.approval_delay)

484

842

485

@staticmethod

843

486

def config_parser(config):

844

487

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

851

494

for client_name in config.sections():

852

495

section = dict(config.items(client_name))

853

496

client = settings[client_name] = {}

854

497

855

498

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

856

499

# Reformat values from string types to Python types

857

500

client["approved_by_default"] = config.getboolean(

858

501

client_name, "approved_by_default")

859

502

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

860

503

"enabled")

861

862

# Uppercase and remove spaces from fingerprint for later

863

# comparison purposes with return value from the

864

# fingerprint() function

504

865

505

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

866

506

.replace(" ", ""))

867

507

if "secret" in section:

868

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

869

.encode("utf-8"),

870

"base64")

508

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

871

509

elif "secfile" in section:

872

510

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

873

511

(section["secfile"])),

874

512

"rb") as secfile:

875

513

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

876

514

else:

877

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

515

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

878

516

.format(section))

879

517

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

880

518

client["extended_timeout"] = string_to_delta(

888

526

client["last_approval_request"] = None

889

527

client["last_checked_ok"] = None

890

528

client["last_checker_status"] = -2

891

529

892

530

return settings

893

894

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

531

532

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

895

533

self.name = name

896

534

if server_settings is None:

897

535

server_settings = {}

898

536

self.server_settings = server_settings

899

537

# adding all client settings

900

for setting, value in settings.items():

538

for setting, value in settings.iteritems():

901

539

setattr(self, setting, value)

902

540

903

541

if self.enabled:

904

542

if not hasattr(self, "last_enabled"):

905

543

self.last_enabled = datetime.datetime.utcnow()

909

547

else:

910

548

self.last_enabled = None

911

549

self.expires = None

912

550

913

551

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

552

# Uppercase and remove spaces from fingerprint for later

553

# comparison purposes with return value from the fingerprint()

554

# function

914

555

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

915

556

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

916

557

datetime.datetime.utcnow())

917

558

918

559

# attributes specific for this server instance

919

560

self.checker = None

920

561

self.checker_initiator_tag = None

923

564

self.current_checker_command = None

924

565

self.approved = None

925

566

self.approvals_pending = 0

926

self.changedstate = multiprocessing_manager.Condition(

927

multiprocessing_manager.Lock())

928

self.client_structure = [attr

929

for attr in self.__dict__.keys()

567

self.changedstate = (multiprocessing_manager

568

.Condition(multiprocessing_manager

569

.Lock()))

570

self.client_structure = [attr for attr in

571

self.__dict__.iterkeys()

930

572

if not attr.startswith("_")]

931

573

self.client_structure.append("client_structure")

932

933

for name, t in inspect.getmembers(

934

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

574

575

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

576

lambda obj:

577

isinstance(obj,

578

property)):

935

579

if not name.startswith("_"):

936

580

self.client_structure.append(name)

937

581

938

582

# Send notice to process children that client state has changed

939

583

def send_changedstate(self):

940

584

with self.changedstate:

941

585

self.changedstate.notify_all()

942

586

943

587

def enable(self):

944

588

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

945

589

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

950

594

self.last_enabled = datetime.datetime.utcnow()

951

595

self.init_checker()

952

596

self.send_changedstate()

953

597

954

598

def disable(self, quiet=True):

955

599

"""Disable this client."""

956

600

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

958

602

if not quiet:

959

603

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

960

604

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

961

GLib.source_remove(self.disable_initiator_tag)

605

gobject.source_remove(self.disable_initiator_tag)

962

606

self.disable_initiator_tag = None

963

607

self.expires = None

964

608

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

965

GLib.source_remove(self.checker_initiator_tag)

609

gobject.source_remove(self.checker_initiator_tag)

966

610

self.checker_initiator_tag = None

967

611

self.stop_checker()

968

612

self.enabled = False

969

613

if not quiet:

970

614

self.send_changedstate()

971

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

615

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

972

616

return False

973

617

974

618

def __del__(self):

975

619

self.disable()

976

620

977

621

def init_checker(self):

978

622

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

979

623

# and every interval from then on.

980

624

if self.checker_initiator_tag is not None:

981

GLib.source_remove(self.checker_initiator_tag)

982

self.checker_initiator_tag = GLib.timeout_add(

983

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

984

self.start_checker)

625

gobject.source_remove(self.checker_initiator_tag)

626

self.checker_initiator_tag = (gobject.timeout_add

627

(self.interval_milliseconds(),

628

self.start_checker))

985

629

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

986

630

if self.disable_initiator_tag is not None:

987

GLib.source_remove(self.disable_initiator_tag)

988

self.disable_initiator_tag = GLib.timeout_add(

989

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

631

gobject.source_remove(self.disable_initiator_tag)

632

self.disable_initiator_tag = (gobject.timeout_add

633

(self.timeout_milliseconds(),

634

self.disable))

990

635

# Also start a new checker *right now*.

991

636

self.start_checker()

992

993

def checker_callback(self, source, condition, connection,

994

command):

637

638

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

995

639

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

996

640

self.checker_callback_tag = None

997

641

self.checker = None

998

# Read return code from connection (see call_pipe)

999

returncode = connection.recv()

1000

connection.close()

1001

1002

if returncode >= 0:

1003

self.last_checker_status = returncode

1004

self.last_checker_signal = None

642

if os.WIFEXITED(condition):

643

self.last_checker_status = os.WEXITSTATUS(condition)

1005

644

if self.last_checker_status == 0:

1006

645

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

1007

646

vars(self))

1008

647

self.checked_ok()

1009

648

else:

1010

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

649

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

650

vars(self))

1011

651

else:

1012

652

self.last_checker_status = -1

1013

self.last_checker_signal = -returncode

1014

653

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

1015

654

vars(self))

1016

return False

1017

655

1018

656

def checked_ok(self):

1019

657

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

1020

658

self.last_checked_ok = datetime.datetime.utcnow()

1021

659

self.last_checker_status = 0

1022

self.last_checker_signal = None

1023

660

self.bump_timeout()

1024

661

1025

662

def bump_timeout(self, timeout=None):

1026

663

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

1027

664

if timeout is None:

1028

665

timeout = self.timeout

1029

666

if self.disable_initiator_tag is not None:

1030

GLib.source_remove(self.disable_initiator_tag)

667

gobject.source_remove(self.disable_initiator_tag)

1031

668

self.disable_initiator_tag = None

1032

669

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

1033

self.disable_initiator_tag = GLib.timeout_add(

1034

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

670

self.disable_initiator_tag = (gobject.timeout_add

671

(timedelta_to_milliseconds

672

(timeout), self.disable))

1035

673

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

1036

674

1037

675

def need_approval(self):

1038

676

self.last_approval_request = datetime.datetime.utcnow()

1039

677

1040

678

def start_checker(self):

1041

679

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

1042

680

1043

681

If a checker already exists, leave it running and do

1044

682

nothing."""

1045

683

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

1050

688

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

1051

689

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

1052

690

# should be.

1053

1054

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

1055

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

1056

self.checker.join()

1057

self.checker = None

691

692

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

693

try:

694

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

695

except AttributeError:

696

pass

697

except OSError as error:

698

if error.errno != errno.ECHILD:

699

raise

700

else:

701

if pid:

702

logger.warning("Checker was a zombie")

703

gobject.source_remove(self.checker_callback_tag)

704

self.checker_callback(pid, status,

705

self.current_checker_command)

1058

706

# Start a new checker if needed

1059

707

if self.checker is None:

1060

708

# Escape attributes for the shell

1061

escaped_attrs = {

1062

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

1063

for attr in self.runtime_expansions}

709

escaped_attrs = dict(

710

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

711

for attr in

712

self.runtime_expansions)

1064

713

try:

1065

714

command = self.checker_command % escaped_attrs

1066

715

except TypeError as error:

1067

716

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

1068

self.checker_command,

717

self.checker_command, exc_info=error)

718

return True # Try again later

719

self.current_checker_command = command

720

try:

721

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

722

command, self.name)

723

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

724

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

725

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

726

# always replaced by /dev/null.)

727

# The exception is when not debugging but nevertheless

728

# running in the foreground; use the previously

729

# created wnull.

730

popen_args = {}

731

if (not self.server_settings["debug"]

732

and self.server_settings["foreground"]):

733

popen_args.update({"stdout": wnull,

734

"stderr": wnull })

735

self.checker = subprocess.Popen(command,

736

close_fds=True,

737

shell=True, cwd="/",

738

**popen_args)

739

except OSError as error:

740

logger.error("Failed to start subprocess",

1069

741

exc_info=error)

1070

return True # Try again later

1071

self.current_checker_command = command

1072

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

1073

self.name)

1074

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

1075

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

1076

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

1077

# always replaced by /dev/null.)

1078

# The exception is when not debugging but nevertheless

1079

# running in the foreground; use the previously

1080

# created wnull.

1081

popen_args = {"close_fds": True,

1082

"shell": True,

1083

"cwd": "/"}

1084

if (not self.server_settings["debug"]

1085

and self.server_settings["foreground"]):

1086

popen_args.update({"stdout": wnull,

1087

"stderr": wnull})

1088

pipe = multiprocessing.Pipe(duplex=False)

1089

self.checker = multiprocessing.Process(

1090

target=call_pipe,

1091

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

1092

kwargs=popen_args)

1093

self.checker.start()

1094

self.checker_callback_tag = GLib.io_add_watch(

1095

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

1096

self.checker_callback, pipe[0], command)

1097

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

742

return True

743

self.checker_callback_tag = (gobject.child_watch_add

744

(self.checker.pid,

745

self.checker_callback,

746

data=command))

747

# The checker may have completed before the gobject

748

# watch was added. Check for this.

749

try:

750

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

751

except OSError as error:

752

if error.errno == errno.ECHILD:

753

# This should never happen

754

logger.error("Child process vanished",

755

exc_info=error)

756

return True

757

raise

758

if pid:

759

gobject.source_remove(self.checker_callback_tag)

760

self.checker_callback(pid, status, command)

761

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

1098

762

return True

1099

763

1100

764

def stop_checker(self):

1101

765

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

1102

766

if self.checker_callback_tag:

1103

GLib.source_remove(self.checker_callback_tag)

767

gobject.source_remove(self.checker_callback_tag)

1104

768

self.checker_callback_tag = None

1105

769

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

1106

770

return

1107

771

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

1108

self.checker.terminate()

772

try:

773

self.checker.terminate()

774

#time.sleep(0.5)

775

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

776

# self.checker.kill()

777

except OSError as error:

778

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

779

raise

1109

780

self.checker = None

1110

781

1111

782

1112

def dbus_service_property(dbus_interface,

1113

signature="v",

1114

access="readwrite",

1115

byte_arrays=False):

783

def dbus_service_property(dbus_interface, signature="v",

784

access="readwrite", byte_arrays=False):

1116

785

"""Decorators for marking methods of a DBusObjectWithProperties to

1117

786

become properties on the D-Bus.

1118

787

1119

788

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

1120

789

and with one argument by "Set".

1121

790

1122

791

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

1123

792

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

1124

793

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

1127

796

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

1128

797

if byte_arrays and signature != "ay":

1129

798

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

1130

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

1131

799

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

1132

800

def decorator(func):

1133

801

func._dbus_is_property = True

1134

802

func._dbus_interface = dbus_interface

1137

805

func._dbus_name = func.__name__

1138

806

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

1139

807

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

1140

func._dbus_get_args_options = {'byte_arrays': byte_arrays}

808

func._dbus_get_args_options = {'byte_arrays': byte_arrays }

1141

809

return func

1142

1143

810

return decorator

1144

811

1145

812

1146

813

def dbus_interface_annotations(dbus_interface):

1147

814

"""Decorator for marking functions returning interface annotations

1148

815

1149

816

Usage:

1150

817

1151

818

@dbus_interface_annotations("org.example.Interface")

1152

819

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

1153

820

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

1154

821

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

1155

822

"false"}

1156

823

"""

1157

1158

824

def decorator(func):

1159

825

func._dbus_is_interface = True

1160

826

func._dbus_interface = dbus_interface

1161

827

func._dbus_name = dbus_interface

1162

828

return func

1163

1164

829

return decorator

1165

830

1166

831

1167

832

def dbus_annotations(annotations):

1168

833

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

1169

834

Usage:

1170

1171

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

1172

"org.freedesktop.DBus.Property."

1173

"EmitsChangedSignal": "false"})

835

1174

836

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

1175

837

access="r")

838

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

839

"org.freedesktop.DBus.Property."

840

"EmitsChangedSignal": "false"})

1176

841

def Property_dbus_property(self):

1177

842

return dbus.Boolean(False)

1178

1179

See also the DBusObjectWithAnnotations class.

1180

843

"""

1181

1182

844

def decorator(func):

1183

845

func._dbus_annotations = annotations

1184

846

return func

1185

1186

847

return decorator

1187

848

1188

849

1189

850

class DBusPropertyException(dbus.exceptions.DBusException):

1190

851

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

1191

852

"""

1192

pass

853

def __unicode__(self):

854

return unicode(str(self))

1193

855

1194

856

1195

857

class DBusPropertyAccessException(DBusPropertyException):

1204

866

pass

1205

867

1206

868

1207

class DBusObjectWithAnnotations(dbus.service.Object):

1208

"""A D-Bus object with annotations.

1209

1210

Classes inheriting from this can use the dbus_annotations

1211

decorator to add annotations to methods or signals.

869

class DBusObjectWithProperties(dbus.service.Object):

870

"""A D-Bus object with properties.

871

872

Classes inheriting from this can use the dbus_service_property

873

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

874

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

1212

875

"""

1213

876

1214

877

@staticmethod

1215

878

def _is_dbus_thing(thing):

1216

879

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

1217

880

1218

881

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

1219

882

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

1220

883

"""

1221

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

884

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

1222

885

False)

1223

886

1224

887

def _get_all_dbus_things(self, thing):

1225

888

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

1226

889

"""

1227

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

890

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

891

name),

1228

892

athing.__get__(self))

1229

893

for cls in self.__class__.__mro__

1230

894

for name, athing in

1231

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

1232

1233

@dbus.service.method(dbus.INTROSPECTABLE_IFACE,

1234

out_signature="s",

1235

path_keyword='object_path',

1236

connection_keyword='connection')

1237

def Introspect(self, object_path, connection):

1238

"""Overloading of standard D-Bus method.

1239

1240

Inserts annotation tags on methods and signals.

1241

"""

1242

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

1243

connection)

1244

try:

1245

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

1246

1247

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

1248

# Add annotation tags

1249

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

1250

for tag in if_tag.getElementsByTagName(typ):

1251

annots = dict()

1252

for name, prop in (self.

1253

_get_all_dbus_things(typ)):

1254

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

1255

and prop._dbus_interface

1256

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

1257

annots.update(getattr(

1258

prop, "_dbus_annotations", {}))

1259

for name, value in annots.items():

1260

ann_tag = document.createElement(

1261

"annotation")

1262

ann_tag.setAttribute("name", name)

1263

ann_tag.setAttribute("value", value)

1264

tag.appendChild(ann_tag)

1265

# Add interface annotation tags

1266

for annotation, value in dict(

1267

itertools.chain.from_iterable(

1268

annotations().items()

1269

for name, annotations

1270

in self._get_all_dbus_things("interface")

1271

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

1272

)).items():

1273

ann_tag = document.createElement("annotation")

1274

ann_tag.setAttribute("name", annotation)

1275

ann_tag.setAttribute("value", value)

1276

if_tag.appendChild(ann_tag)

1277

# Fix argument name for the Introspect method itself

1278

if (if_tag.getAttribute("name")

1279

== dbus.INTROSPECTABLE_IFACE):

1280

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

1281

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

1282

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

1283

if (arg.getAttribute("direction")

1284

== "out"):

1285

arg.setAttribute("name",

1286

"xml_data")

1287

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

1288

document.unlink()

1289

except (AttributeError, xml.dom.DOMException,

1290

xml.parsers.expat.ExpatError) as error:

1291

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

1292

exc_info=error)

1293

return xmlstring

1294

1295

1296

class DBusObjectWithProperties(DBusObjectWithAnnotations):

1297

"""A D-Bus object with properties.

1298

1299

Classes inheriting from this can use the dbus_service_property

1300

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

1301

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

1302

"""

1303

895

inspect.getmembers(cls,

896

self._is_dbus_thing(thing)))

897

1304

898

def _get_dbus_property(self, interface_name, property_name):

1305

899

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

1306

900

property with the specified name and interface.

1307

901

"""

1308

for cls in self.__class__.__mro__:

1309

for name, value in inspect.getmembers(

1310

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

902

for cls in self.__class__.__mro__:

903

for name, value in (inspect.getmembers

904

(cls,

905

self._is_dbus_thing("property"))):

1311

906

if (value._dbus_name == property_name

1312

907

and value._dbus_interface == interface_name):

1313

908

return value.__get__(self)

1314

909

1315

910

# No such property

1316

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

1317

self.dbus_object_path, interface_name, property_name))

1318

1319

@classmethod

1320

def _get_all_interface_names(cls):

1321

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

1322

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

1323

"_dbus_interface", None)

1324

for x in (inspect.getmro(cls))

1325

for attr in dir(x))

1326

if name is not None)

1327

1328

@dbus.service.method(dbus.PROPERTIES_IFACE,

1329

in_signature="ss",

911

raise DBusPropertyNotFound(self.dbus_object_path + ":"

912

+ interface_name + "."

913

+ property_name)

914

915

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

1330

916

out_signature="v")

1331

917

def Get(self, interface_name, property_name):

1332

918

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

1338

924

if not hasattr(value, "variant_level"):

1339

925

return value

1340

926

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

1341

927

1342

928

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

1343

929

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

1344

930

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

1351

937

# signatures other than "ay".

1352

938

if prop._dbus_signature != "ay":

1353

939

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

1354

"'ay' signature {!r}"

940

"'ay' signature {0!r}"

1355

941

.format(prop._dbus_signature))

1356

942

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

1357

943

for byte in value))

1358

944

prop(value)

1359

1360

@dbus.service.method(dbus.PROPERTIES_IFACE,

1361

in_signature="s",

945

946

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

1362

947

out_signature="a{sv}")

1363

948

def GetAll(self, interface_name):

1364

949

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

1365

950

standard.

1366

951

1367

952

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

1368

953

"""

1369

954

properties = {}

1379

964

if not hasattr(value, "variant_level"):

1380

965

properties[name] = value

1381

966

continue

1382

properties[name] = type(value)(

1383

value, variant_level=value.variant_level + 1)

967

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

968

value.variant_level+1)

1384

969

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

1385

1386

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

1387

def PropertiesChanged(self, interface_name, changed_properties,

1388

invalidated_properties):

1389

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

1390

standard.

1391

"""

1392

pass

1393

970

1394

971

@dbus.service.method(dbus.INTROSPECTABLE_IFACE,

1395

972

out_signature="s",

1396

973

path_keyword='object_path',

1397

974

connection_keyword='connection')

1398

975

def Introspect(self, object_path, connection):

1399

976

"""Overloading of standard D-Bus method.

1400

977

1401

978

Inserts property tags and interface annotation tags.

1402

979

"""

1403

xmlstring = DBusObjectWithAnnotations.Introspect(self,

1404

object_path,

1405

connection)

980

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

981

connection)

1406

982

try:

1407

983

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

1408

1409

984

def make_tag(document, name, prop):

1410

985

e = document.createElement("property")

1411

986

e.setAttribute("name", name)

1412

987

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

1413

988

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

1414

989

return e

1415

1416

990

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

1417

991

# Add property tags

1418

992

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

1421

995

if prop._dbus_interface

1422

996

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

1423

997

if_tag.appendChild(tag)

1424

# Add annotation tags for properties

1425

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

1426

annots = dict()

1427

for name, prop in self._get_all_dbus_things(

1428

"property"):

1429

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

1430

and prop._dbus_interface

1431

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

1432

annots.update(getattr(

1433

prop, "_dbus_annotations", {}))

1434

for name, value in annots.items():

1435

ann_tag = document.createElement(

1436

"annotation")

1437

ann_tag.setAttribute("name", name)

1438

ann_tag.setAttribute("value", value)

1439

tag.appendChild(ann_tag)

998

# Add annotation tags

999

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

1000

for tag in if_tag.getElementsByTagName(typ):

1001

annots = dict()

1002

for name, prop in (self.

1003

_get_all_dbus_things(typ)):

1004

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

1005

and prop._dbus_interface

1006

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

1007

annots.update(getattr

1008

(prop,

1009

"_dbus_annotations",

1010

{}))

1011

for name, value in annots.iteritems():

1012

ann_tag = document.createElement(

1013

"annotation")

1014

ann_tag.setAttribute("name", name)

1015

ann_tag.setAttribute("value", value)

1016

tag.appendChild(ann_tag)

1017

# Add interface annotation tags

1018

for annotation, value in dict(

1019

itertools.chain.from_iterable(

1020

annotations().iteritems()

1021

for name, annotations in

1022

self._get_all_dbus_things("interface")

1023

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

1024

)).iteritems():

1025

ann_tag = document.createElement("annotation")

1026

ann_tag.setAttribute("name", annotation)

1027

ann_tag.setAttribute("value", value)

1028

if_tag.appendChild(ann_tag)

1440

1029

# Add the names to the return values for the

1441

1030

# "org.freedesktop.DBus.Properties" methods

1442

1031

if (if_tag.getAttribute("name")

1461

1050

return xmlstring

1462

1051

1463

1052

1464

try:

1465

dbus.OBJECT_MANAGER_IFACE

1466

except AttributeError:

1467

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

1468

1469

1470

class DBusObjectWithObjectManager(DBusObjectWithAnnotations):

1471

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

1472

1473

Classes inheriting from this exposes the standard

1474

GetManagedObjects call and the InterfacesAdded and

1475

InterfacesRemoved signals on the standard

1476

"org.freedesktop.DBus.ObjectManager" interface.

1477

1478

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

1479

manually.

1480

"""

1481

@dbus.service.method(dbus.OBJECT_MANAGER_IFACE,

1482

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

1483

def GetManagedObjects(self):

1484

"""This function must be overridden"""

1485

raise NotImplementedError()

1486

1487

@dbus.service.signal(dbus.OBJECT_MANAGER_IFACE,

1488

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

1489

def InterfacesAdded(self, object_path, interfaces_and_properties):

1490

pass

1491

1492

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

1493

def InterfacesRemoved(self, object_path, interfaces):

1494

pass

1495

1496

@dbus.service.method(dbus.INTROSPECTABLE_IFACE,

1497

out_signature="s",

1498

path_keyword='object_path',

1499

connection_keyword='connection')

1500

def Introspect(self, object_path, connection):

1501

"""Overloading of standard D-Bus method.

1502

1503

Override return argument name of GetManagedObjects to be

1504

"objpath_interfaces_and_properties"

1505

"""

1506

xmlstring = DBusObjectWithAnnotations.Introspect(self,

1507

object_path,

1508

connection)

1509

try:

1510

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

1511

1512

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

1513

# Fix argument name for the GetManagedObjects method

1514

if (if_tag.getAttribute("name")

1515

== dbus.OBJECT_MANAGER_IFACE):

1516

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

1517

if (cn.getAttribute("name")

1518

== "GetManagedObjects"):

1519

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

1520

if (arg.getAttribute("direction")

1521

== "out"):

1522

arg.setAttribute(

1523

"name",

1524

"objpath_interfaces"

1525

"_and_properties")

1526

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

1527

document.unlink()

1528

except (AttributeError, xml.dom.DOMException,

1529

xml.parsers.expat.ExpatError) as error:

1530

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

1531

exc_info=error)

1532

return xmlstring

1533

1534

1535

1053

def datetime_to_dbus(dt, variant_level=0):

1536

1054

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

1537

1055

if dt is None:

1538

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

1539

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

1056

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

1057

return dbus.String(dt.isoformat(),

1058

variant_level=variant_level)

1540

1059

1541

1060

1542

1061

def alternate_dbus_interfaces(alt_interface_names, deprecate=True):

1544

1063

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

1545

1064

interface names according to the "alt_interface_names" mapping.

1546

1065

Usage:

1547

1066

1548

1067

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

1549

1068

"net.example.AlternateInterface"})

1550

1069

class SampleDBusObject(dbus.service.Object):

1551

1070

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

1552

1071

def SampleDBusMethod():

1553

1072

pass

1554

1073

1555

1074

The above "SampleDBusMethod" on "SampleDBusObject" will be

1556

1075

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

1557

1076

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

1558

1077

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

1559

1078

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

1560

1079

1561

1080

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

1562

1081

(from DBusObjectWithProperties) and interfaces (from the

1563

1082

dbus_interface_annotations decorator).

1564

1083

"""

1565

1566

1084

def wrapper(cls):

1567

1085

for orig_interface_name, alt_interface_name in (

1568

alt_interface_names.items()):

1086

alt_interface_names.iteritems()):

1569

1087

attr = {}

1570

1088

interface_names = set()

1571

1089

# Go though all attributes of the class

1573

1091

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

1574

1092

# with the wrong interface name

1575

1093

if (not hasattr(attribute, "_dbus_interface")

1576

or not attribute._dbus_interface.startswith(

1577

orig_interface_name)):

1094

or not attribute._dbus_interface

1095

.startswith(orig_interface_name)):

1578

1096

continue

1579

1097

# Create an alternate D-Bus interface name based on

1580

1098

# the current name

1581

alt_interface = attribute._dbus_interface.replace(

1582

orig_interface_name, alt_interface_name)

1099

alt_interface = (attribute._dbus_interface

1100

.replace(orig_interface_name,

1101

alt_interface_name))

1583

1102

interface_names.add(alt_interface)

1584

1103

# Is this a D-Bus signal?

1585

1104

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

1586

1105

# Extract the original non-method undecorated

1587

1106

# function by black magic

1588

if sys.version_info.major == 2:

1589

nonmethod_func = (dict(

1107

nonmethod_func = (dict(

1590

1108

zip(attribute.func_code.co_freevars,

1591

attribute.__closure__))

1592

["func"].cell_contents)

1593

else:

1594

nonmethod_func = (dict(

1595

zip(attribute.__code__.co_freevars,

1596

attribute.__closure__))

1597

["func"].cell_contents)

1109

attribute.__closure__))["func"]

1110

.cell_contents)

1598

1111

# Create a new, but exactly alike, function

1599

1112

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

1600

1113

# with the alternate D-Bus interface name

1601

new_function = copy_function(nonmethod_func)

1602

new_function = (dbus.service.signal(

1603

alt_interface,

1604

attribute._dbus_signature)(new_function))

1114

new_function = (dbus.service.signal

1115

(alt_interface,

1116

attribute._dbus_signature)

1117

(types.FunctionType(

1118

nonmethod_func.func_code,

1119

nonmethod_func.func_globals,

1120

nonmethod_func.func_name,

1121

nonmethod_func.func_defaults,

1122

nonmethod_func.func_closure)))

1605

1123

# Copy annotations, if any

1606

1124

try:

1607

new_function._dbus_annotations = dict(

1608

attribute._dbus_annotations)

1125

new_function._dbus_annotations = (

1126

dict(attribute._dbus_annotations))

1609

1127

except AttributeError:

1610

1128

pass

1611

1612

1129

# Define a creator of a function to call both the

1613

1130

# original and alternate functions, so both the

1614

1131

# original and alternate signals gets sent when

1617

1134

"""This function is a scope container to pass

1618

1135

func1 and func2 to the "call_both" function

1619

1136

outside of its arguments"""

1620

1621

@functools.wraps(func2)

1622

1137

def call_both(*args, **kwargs):

1623

1138

"""This function will emit two D-Bus

1624

1139

signals by calling func1 and func2"""

1625

1140

func1(*args, **kwargs)

1626

1141

func2(*args, **kwargs)

1627

# Make wrapper function look like a D-Bus

1628

# signal

1629

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

1630

if name.startswith("_dbus_"):

1631

setattr(call_both, name, attr)

1632

1633

1142

return call_both

1634

1143

# Create the "call_both" function and add it to

1635

1144

# the class

1640

1149

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

1641

1150

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

1642

1151

# to the class.

1643

attr[attrname] = (

1644

dbus.service.method(

1645

alt_interface,

1646

attribute._dbus_in_signature,

1647

attribute._dbus_out_signature)

1648

(copy_function(attribute)))

1152

attr[attrname] = (dbus.service.method

1153

(alt_interface,

1154

attribute._dbus_in_signature,

1155

attribute._dbus_out_signature)

1156

(types.FunctionType

1157

(attribute.func_code,

1158

attribute.func_globals,

1159

attribute.func_name,

1160

attribute.func_defaults,

1161

attribute.func_closure)))

1649

1162

# Copy annotations, if any

1650

1163

try:

1651

attr[attrname]._dbus_annotations = dict(

1652

attribute._dbus_annotations)

1164

attr[attrname]._dbus_annotations = (

1165

dict(attribute._dbus_annotations))

1653

1166

except AttributeError:

1654

1167

pass

1655

1168

# Is this a D-Bus property?

1658

1171

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

1659

1172

# property with the alternate D-Bus interface

1660

1173

# name. Add it to the class.

1661

attr[attrname] = (dbus_service_property(

1662

alt_interface, attribute._dbus_signature,

1663

attribute._dbus_access,

1664

attribute._dbus_get_args_options

1665

["byte_arrays"])

1666

(copy_function(attribute)))

1174

attr[attrname] = (dbus_service_property

1175

(alt_interface,

1176

attribute._dbus_signature,

1177

attribute._dbus_access,

1178

attribute

1179

._dbus_get_args_options

1180

["byte_arrays"])

1181

(types.FunctionType

1182

(attribute.func_code,

1183

attribute.func_globals,

1184

attribute.func_name,

1185

attribute.func_defaults,

1186

attribute.func_closure)))

1667

1187

# Copy annotations, if any

1668

1188

try:

1669

attr[attrname]._dbus_annotations = dict(

1670

attribute._dbus_annotations)

1189

attr[attrname]._dbus_annotations = (

1190

dict(attribute._dbus_annotations))

1671

1191

except AttributeError:

1672

1192

pass

1673

1193

# Is this a D-Bus interface?

1676

1196

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

1677

1197

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

1678

1198

# to the class.

1679

attr[attrname] = (

1680

dbus_interface_annotations(alt_interface)

1681

(copy_function(attribute)))

1199

attr[attrname] = (dbus_interface_annotations

1200

(alt_interface)

1201

(types.FunctionType

1202

(attribute.func_code,

1203

attribute.func_globals,

1204

attribute.func_name,

1205

attribute.func_defaults,

1206

attribute.func_closure)))

1682

1207

if deprecate:

1683

1208

# Deprecate all alternate interfaces

1684

iname = "_AlternateDBusNames_interface_annotation{}"

1209

iname="_AlternateDBusNames_interface_annotation{0}"

1685

1210

for interface_name in interface_names:

1686

1687

1211

@dbus_interface_annotations(interface_name)

1688

1212

def func(self):

1689

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

1690

"true"}

1213

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

1214

"true" }

1691

1215

# Find an unused name

1692

1216

for aname in (iname.format(i)

1693

1217

for i in itertools.count()):

1697

1221

if interface_names:

1698

1222

# Replace the class with a new subclass of it with

1699

1223

# methods, signals, etc. as created above.

1700

if sys.version_info.major == 2:

1701

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

1702

(cls, ), attr)

1703

else:

1704

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

1705

(cls, ), attr)

1224

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

1225

(cls,), attr)

1706

1226

return cls

1707

1708

1227

return wrapper

1709

1228

1710

1229

1711

1230

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

1712

"se.bsnet.fukt.Mandos"})

1231

"se.bsnet.fukt.Mandos"})

1713

1232

class ClientDBus(Client, DBusObjectWithProperties):

1714

1233

"""A Client class using D-Bus

1715

1234

1716

1235

Attributes:

1717

1236

dbus_object_path: dbus.ObjectPath

1718

1237

bus: dbus.SystemBus()

1719

1238

"""

1720

1239

1721

1240

runtime_expansions = (Client.runtime_expansions

1722

+ ("dbus_object_path", ))

1723

1724

_interface = "se.recompile.Mandos.Client"

1725

1241

+ ("dbus_object_path",))

1242

1726

1243

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

1727

1728

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

1244

1245

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

1729

1246

self.bus = bus

1730

1247

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

1731

1248

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

1732

1249

# the D-Bus

1733

client_object_name = str(self.name).translate(

1250

client_object_name = unicode(self.name).translate(

1734

1251

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

1735

1252

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

1736

self.dbus_object_path = dbus.ObjectPath(

1737

"/clients/" + client_object_name)

1253

self.dbus_object_path = (dbus.ObjectPath

1254

("/clients/" + client_object_name))

1738

1255

DBusObjectWithProperties.__init__(self, self.bus,

1739

1256

self.dbus_object_path)

1740

1741

def notifychangeproperty(transform_func, dbus_name,

1742

type_func=lambda x: x,

1743

variant_level=1,

1744

invalidate_only=False,

1745

_interface=_interface):

1257

1258

def notifychangeproperty(transform_func,

1259

dbus_name, type_func=lambda x: x,

1260

variant_level=1):

1746

1261

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

1747

1262

its changes to DBus.

1748

1263

1749

1264

transform_fun: Function that takes a value and a variant_level

1750

1265

and transforms it to a D-Bus type.

1751

1266

dbus_name: D-Bus name of the variable

1753

1268

to the D-Bus. Default: no transform

1754

1269

variant_level: D-Bus variant level. Default: 1

1755

1270

"""

1756

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

1757

1271

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

1758

1272

def setter(self, value):

1759

1273

if hasattr(self, "dbus_object_path"):

1760

1274

if (not hasattr(self, attrname) or

1761

1275

type_func(getattr(self, attrname, None))

1762

1276

!= type_func(value)):

1763

if invalidate_only:

1764

self.PropertiesChanged(

1765

_interface, dbus.Dictionary(),

1766

dbus.Array((dbus_name, )))

1767

else:

1768

dbus_value = transform_func(

1769

type_func(value),

1770

variant_level=variant_level)

1771

self.PropertyChanged(dbus.String(dbus_name),

1772

dbus_value)

1773

self.PropertiesChanged(

1774

_interface,

1775

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

1776

dbus_value}),

1777

dbus.Array())

1277

dbus_value = transform_func(type_func(value),

1278

variant_level

1279

=variant_level)

1280

self.PropertyChanged(dbus.String(dbus_name),

1281

dbus_value)

1778

1282

setattr(self, attrname, value)

1779

1283

1780

1284

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

1781

1285

1782

1286

expires = notifychangeproperty(datetime_to_dbus, "Expires")

1783

1287

approvals_pending = notifychangeproperty(dbus.Boolean,

1784

1288

"ApprovalPending",

1785

type_func=bool)

1289

type_func = bool)

1786

1290

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

1787

1291

last_enabled = notifychangeproperty(datetime_to_dbus,

1788

1292

"LastEnabled")

1789

checker = notifychangeproperty(

1790

dbus.Boolean, "CheckerRunning",

1791

type_func=lambda checker: checker is not None)

1293

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

1294

type_func = lambda checker:

1295

checker is not None)

1792

1296

last_checked_ok = notifychangeproperty(datetime_to_dbus,

1793

1297

"LastCheckedOK")

1794

1298

last_checker_status = notifychangeproperty(dbus.Int16,

1797

1301

datetime_to_dbus, "LastApprovalRequest")

1798

1302

approved_by_default = notifychangeproperty(dbus.Boolean,

1799

1303

"ApprovedByDefault")

1800

approval_delay = notifychangeproperty(

1801

dbus.UInt64, "ApprovalDelay",

1802

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

1304

approval_delay = notifychangeproperty(dbus.UInt64,

1305

"ApprovalDelay",

1306

type_func =

1307

timedelta_to_milliseconds)

1803

1308

approval_duration = notifychangeproperty(

1804

1309

dbus.UInt64, "ApprovalDuration",

1805

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

1310

type_func = timedelta_to_milliseconds)

1806

1311

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

1807

timeout = notifychangeproperty(

1808

dbus.UInt64, "Timeout",

1809

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

1312

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

1313

type_func =

1314

timedelta_to_milliseconds)

1810

1315

extended_timeout = notifychangeproperty(

1811

1316

dbus.UInt64, "ExtendedTimeout",

1812

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

1813

interval = notifychangeproperty(

1814

dbus.UInt64, "Interval",

1815

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

1317

type_func = timedelta_to_milliseconds)

1318

interval = notifychangeproperty(dbus.UInt64,

1319

"Interval",

1320

type_func =

1321

timedelta_to_milliseconds)

1816

1322

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

1817

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

1818

invalidate_only=True)

1819

1323

1820

1324

del notifychangeproperty

1821

1325

1822

1326

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

1823

1327

try:

1824

1328

self.remove_from_connection()

1827

1331

if hasattr(DBusObjectWithProperties, "__del__"):

1828

1332

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

1829

1333

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

1830

1831

def checker_callback(self, source, condition,

1832

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

1833

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

1834

connection, command, *args,

1835

**kwargs)

1836

exitstatus = self.last_checker_status

1837

if exitstatus >= 0:

1334

1335

def checker_callback(self, pid, condition, command,

1336

*args, **kwargs):

1337

self.checker_callback_tag = None

1338

self.checker = None

1339

if os.WIFEXITED(condition):

1340

exitstatus = os.WEXITSTATUS(condition)

1838

1341

# Emit D-Bus signal

1839

1342

self.CheckerCompleted(dbus.Int16(exitstatus),

1840

# This is specific to GNU libC

1841

dbus.Int64(exitstatus << 8),

1343

dbus.Int64(condition),

1842

1344

dbus.String(command))

1843

1345

else:

1844

1346

# Emit D-Bus signal

1845

1347

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

1846

dbus.Int64(

1847

# This is specific to GNU libC

1848

(exitstatus << 8)

1849

| self.last_checker_signal),

1348

dbus.Int64(condition),

1850

1349

dbus.String(command))

1851

return ret

1852

1350

1351

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

1352

*args, **kwargs)

1353

1853

1354

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

1854

1355

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

1855

1356

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

1859

1360

# Emit D-Bus signal

1860

1361

self.CheckerStarted(self.current_checker_command)

1861

1362

return r

1862

1363

1863

1364

def _reset_approved(self):

1864

1365

self.approved = None

1865

1366

return False

1866

1367

1867

1368

def approve(self, value=True):

1868

1369

self.approved = value

1869

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

1870

* 1000), self._reset_approved)

1370

gobject.timeout_add(timedelta_to_milliseconds

1371

(self.approval_duration),

1372

self._reset_approved)

1871

1373

self.send_changedstate()

1872

1873

# D-Bus methods, signals & properties

1874

1875

# Interfaces

1876

1877

# Signals

1878

1374

1375

## D-Bus methods, signals & properties

1376

_interface = "se.recompile.Mandos.Client"

1377

1378

## Interfaces

1379

1380

@dbus_interface_annotations(_interface)

1381

def _foo(self):

1382

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

1383

"false"}

1384

1385

## Signals

1386

1879

1387

# CheckerCompleted - signal

1880

1388

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

1881

1389

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

1882

1390

"D-Bus signal"

1883

1391

pass

1884

1392

1885

1393

# CheckerStarted - signal

1886

1394

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

1887

1395

def CheckerStarted(self, command):

1888

1396

"D-Bus signal"

1889

1397

pass

1890

1398

1891

1399

# PropertyChanged - signal

1892

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

1893

1400

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

1894

1401

def PropertyChanged(self, property, value):

1895

1402

"D-Bus signal"

1896

1403

pass

1897

1404

1898

1405

# GotSecret - signal

1899

1406

@dbus.service.signal(_interface)

1900

1407

def GotSecret(self):

1903

1410

server to mandos-client

1904

1411

"""

1905

1412

pass

1906

1413

1907

1414

# Rejected - signal

1908

1415

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

1909

1416

def Rejected(self, reason):

1910

1417

"D-Bus signal"

1911

1418

pass

1912

1419

1913

1420

# NeedApproval - signal

1914

1421

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

1915

1422

def NeedApproval(self, timeout, default):

1916

1423

"D-Bus signal"

1917

1424

return self.need_approval()

1918

1919

# Methods

1920

1425

1426

## Methods

1427

1921

1428

# Approve - method

1922

1429

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

1923

1430

def Approve(self, value):

1924

1431

self.approve(value)

1925

1432

1926

1433

# CheckedOK - method

1927

1434

@dbus.service.method(_interface)

1928

1435

def CheckedOK(self):

1929

1436

self.checked_ok()

1930

1437

1931

1438

# Enable - method

1932

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

1933

1439

@dbus.service.method(_interface)

1934

1440

def Enable(self):

1935

1441

"D-Bus method"

1936

1442

self.enable()

1937

1443

1938

1444

# StartChecker - method

1939

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

1940

1445

@dbus.service.method(_interface)

1941

1446

def StartChecker(self):

1942

1447

"D-Bus method"

1943

1448

self.start_checker()

1944

1449

1945

1450

# Disable - method

1946

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

1947

1451

@dbus.service.method(_interface)

1948

1452

def Disable(self):

1949

1453

"D-Bus method"

1950

1454

self.disable()

1951

1455

1952

1456

# StopChecker - method

1953

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

1954

1457

@dbus.service.method(_interface)

1955

1458

def StopChecker(self):

1956

1459

self.stop_checker()

1957

1958

# Properties

1959

1460

1461

## Properties

1462

1960

1463

# ApprovalPending - property

1961

1464

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

1962

1465

def ApprovalPending_dbus_property(self):

1963

1466

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

1964

1467

1965

1468

# ApprovedByDefault - property

1966

@dbus_service_property(_interface,

1967

signature="b",

1469

@dbus_service_property(_interface, signature="b",

1968

1470

access="readwrite")

1969

1471

def ApprovedByDefault_dbus_property(self, value=None):

1970

1472

if value is None: # get

1971

1473

return dbus.Boolean(self.approved_by_default)

1972

1474

self.approved_by_default = bool(value)

1973

1475

1974

1476

# ApprovalDelay - property

1975

@dbus_service_property(_interface,

1976

signature="t",

1477

@dbus_service_property(_interface, signature="t",

1977

1478

access="readwrite")

1978

1479

def ApprovalDelay_dbus_property(self, value=None):

1979

1480

if value is None: # get

1980

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

1981

* 1000)

1481

return dbus.UInt64(self.approval_delay_milliseconds())

1982

1482

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

1983

1483

1984

1484

# ApprovalDuration - property

1985

@dbus_service_property(_interface,

1986

signature="t",

1485

@dbus_service_property(_interface, signature="t",

1987

1486

access="readwrite")

1988

1487

def ApprovalDuration_dbus_property(self, value=None):

1989

1488

if value is None: # get

1990

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

1991

* 1000)

1489

return dbus.UInt64(timedelta_to_milliseconds(

1490

self.approval_duration))

1992

1491

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

1993

1492

1994

1493

# Name - property

1995

@dbus_annotations(

1996

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

1997

1494

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

1998

1495

def Name_dbus_property(self):

1999

1496

return dbus.String(self.name)

2000

1497

2001

1498

# Fingerprint - property

2002

@dbus_annotations(

2003

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

2004

1499

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

2005

1500

def Fingerprint_dbus_property(self):

2006

1501

return dbus.String(self.fingerprint)

2007

1502

2008

1503

# Host - property

2009

@dbus_service_property(_interface,

2010

signature="s",

1504

@dbus_service_property(_interface, signature="s",

2011

1505

access="readwrite")

2012

1506

def Host_dbus_property(self, value=None):

2013

1507

if value is None: # get

2014

1508

return dbus.String(self.host)

2015

self.host = str(value)

2016

1509

self.host = unicode(value)

1510

2017

1511

# Created - property

2018

@dbus_annotations(

2019

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

2020

1512

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

2021

1513

def Created_dbus_property(self):

2022

1514

return datetime_to_dbus(self.created)

2023

1515

2024

1516

# LastEnabled - property

2025

1517

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

2026

1518

def LastEnabled_dbus_property(self):

2027

1519

return datetime_to_dbus(self.last_enabled)

2028

1520

2029

1521

# Enabled - property

2030

@dbus_service_property(_interface,

2031

signature="b",

1522

@dbus_service_property(_interface, signature="b",

2032

1523

access="readwrite")

2033

1524

def Enabled_dbus_property(self, value=None):

2034

1525

if value is None: # get

2037

1528

self.enable()

2038

1529

else:

2039

1530

self.disable()

2040

1531

2041

1532

# LastCheckedOK - property

2042

@dbus_service_property(_interface,

2043

signature="s",

1533

@dbus_service_property(_interface, signature="s",

2044

1534

access="readwrite")

2045

1535

def LastCheckedOK_dbus_property(self, value=None):

2046

1536

if value is not None:

2047

1537

self.checked_ok()

2048

1538

return

2049

1539

return datetime_to_dbus(self.last_checked_ok)

2050

1540

2051

1541

# LastCheckerStatus - property

2052

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

1542

@dbus_service_property(_interface, signature="n",

1543

access="read")

2053

1544

def LastCheckerStatus_dbus_property(self):

2054

1545

return dbus.Int16(self.last_checker_status)

2055

1546

2056

1547

# Expires - property

2057

1548

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

2058

1549

def Expires_dbus_property(self):

2059

1550

return datetime_to_dbus(self.expires)

2060

1551

2061

1552

# LastApprovalRequest - property

2062

1553

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

2063

1554

def LastApprovalRequest_dbus_property(self):

2064

1555

return datetime_to_dbus(self.last_approval_request)

2065

1556

2066

1557

# Timeout - property

2067

@dbus_service_property(_interface,

2068

signature="t",

1558

@dbus_service_property(_interface, signature="t",

2069

1559

access="readwrite")

2070

1560

def Timeout_dbus_property(self, value=None):

2071

1561

if value is None: # get

2072

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

1562

return dbus.UInt64(self.timeout_milliseconds())

2073

1563

old_timeout = self.timeout

2074

1564

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

2075

1565

# Reschedule disabling

2083

1573

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

2084

1574

is None):

2085

1575

return

2086

GLib.source_remove(self.disable_initiator_tag)

2087

self.disable_initiator_tag = GLib.timeout_add(

2088

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

2089

self.disable)

2090

1576

gobject.source_remove(self.disable_initiator_tag)

1577

self.disable_initiator_tag = (

1578

gobject.timeout_add(

1579

timedelta_to_milliseconds(self.expires - now),

1580

self.disable))

1581

2091

1582

# ExtendedTimeout - property

2092

@dbus_service_property(_interface,

2093

signature="t",

1583

@dbus_service_property(_interface, signature="t",

2094

1584

access="readwrite")

2095

1585

def ExtendedTimeout_dbus_property(self, value=None):

2096

1586

if value is None: # get

2097

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

2098

* 1000)

1587

return dbus.UInt64(self.extended_timeout_milliseconds())

2099

1588

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

2100

1589

2101

1590

# Interval - property

2102

@dbus_service_property(_interface,

2103

signature="t",

1591

@dbus_service_property(_interface, signature="t",

2104

1592

access="readwrite")

2105

1593

def Interval_dbus_property(self, value=None):

2106

1594

if value is None: # get

2107

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

1595

return dbus.UInt64(self.interval_milliseconds())

2108

1596

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

2109

1597

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

2110

1598

return

2111

1599

if self.enabled:

2112

1600

# Reschedule checker run

2113

GLib.source_remove(self.checker_initiator_tag)

2114

self.checker_initiator_tag = GLib.timeout_add(

2115

value, self.start_checker)

2116

self.start_checker() # Start one now, too

2117

1601

gobject.source_remove(self.checker_initiator_tag)

1602

self.checker_initiator_tag = (gobject.timeout_add

1603

(value, self.start_checker))

1604

self.start_checker() # Start one now, too

1605

2118

1606

# Checker - property

2119

@dbus_service_property(_interface,

2120

signature="s",

1607

@dbus_service_property(_interface, signature="s",

2121

1608

access="readwrite")

2122

1609

def Checker_dbus_property(self, value=None):

2123

1610

if value is None: # get

2124

1611

return dbus.String(self.checker_command)

2125

self.checker_command = str(value)

2126

1612

self.checker_command = unicode(value)

1613

2127

1614

# CheckerRunning - property

2128

@dbus_service_property(_interface,

2129

signature="b",

1615

@dbus_service_property(_interface, signature="b",

2130

1616

access="readwrite")

2131

1617

def CheckerRunning_dbus_property(self, value=None):

2132

1618

if value is None: # get

2135

1621

self.start_checker()

2136

1622

else:

2137

1623

self.stop_checker()

2138

1624

2139

1625

# ObjectPath - property

2140

@dbus_annotations(

2141

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

2142

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

2143

1626

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

2144

1627

def ObjectPath_dbus_property(self):

2145

return self.dbus_object_path # is already a dbus.ObjectPath

2146

1628

return self.dbus_object_path # is already a dbus.ObjectPath

1629

2147

1630

# Secret = property

2148

@dbus_annotations(

2149

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

2150

"invalidates"})

2151

@dbus_service_property(_interface,

2152

signature="ay",

2153

access="write",

2154

byte_arrays=True)

1631

@dbus_service_property(_interface, signature="ay",

1632

access="write", byte_arrays=True)

2155

1633

def Secret_dbus_property(self, value):

2156

self.secret = bytes(value)

2157

1634

self.secret = str(value)

1635

2158

1636

del _interface

2159

1637

2160

1638

2163

1641

self._pipe = child_pipe

2164

1642

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

2165

1643

if not self._pipe.recv():

2166

raise KeyError(fpr)

2167

1644

raise KeyError()

1645

2168

1646

def __getattribute__(self, name):

2169

1647

if name == '_pipe':

2170

1648

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

2173

1651

if data[0] == 'data':

2174

1652

return data[1]

2175

1653

if data[0] == 'function':

2176

2177

1654

def func(*args, **kwargs):

2178

1655

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

2179

1656

return self._pipe.recv()[1]

2180

2181

1657

return func

2182

1658

2183

1659

def __setattr__(self, name, value):

2184

1660

if name == '_pipe':

2185

1661

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

2188

1664

2189

1665

class ClientHandler(socketserver.BaseRequestHandler, object):

2190

1666

"""A class to handle client connections.

2191

1667

2192

1668

Instantiated once for each connection to handle it.

2193

1669

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

2194

1670

2195

1671

def handle(self):

2196

1672

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

2197

1673

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

2198

str(self.client_address))

1674

unicode(self.client_address))

2199

1675

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

2200

1676

self.server.child_pipe.fileno())

2201

2202

session = gnutls.ClientSession(self.request)

2203

2204

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

2205

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

2206

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

2207

# "+DHE-DSS"))

1677

1678

session = (gnutls.connection

1679

.ClientSession(self.request,

1680

gnutls.connection

1681

.X509Credentials()))

1682

1683

# Note: gnutls.connection.X509Credentials is really a

1684

# generic GnuTLS certificate credentials object so long as

1685

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

1686

# here despite using OpenPGP certificates.

1687

1688

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

1689

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

1690

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

1691

# "+DHE-DSS"))

2208

1692

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

2209

1693

priority = self.server.gnutls_priority

2210

1694

if priority is None:

2211

1695

priority = "NORMAL"

2212

gnutls.priority_set_direct(session._c_object,

2213

priority.encode("utf-8"),

2214

None)

2215

1696

(gnutls.library.functions

1697

.gnutls_priority_set_direct(session._c_object,

1698

priority, None))

1699

2216

1700

# Start communication using the Mandos protocol

2217

1701

# Get protocol number

2218

1702

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

2223

1707

except (ValueError, IndexError, RuntimeError) as error:

2224

1708

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

2225

1709

return

2226

1710

2227

1711

# Start GnuTLS connection

2228

1712

try:

2229

1713

session.handshake()

2230

except gnutls.Error as error:

1714

except gnutls.errors.GNUTLSError as error:

2231

1715

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

2232

1716

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

2233

1717

# established. Just abandon the request.

2234

1718

return

2235

1719

logger.debug("Handshake succeeded")

2236

1720

2237

1721

approval_required = False

2238

1722

try:

2239

1723

try:

2240

fpr = self.fingerprint(

2241

self.peer_certificate(session))

2242

except (TypeError, gnutls.Error) as error:

1724

fpr = self.fingerprint(self.peer_certificate

1725

(session))

1726

except (TypeError,

1727

gnutls.errors.GNUTLSError) as error:

2243

1728

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

2244

1729

return

2245

1730

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

2246

1731

2247

1732

try:

2248

1733

client = ProxyClient(child_pipe, fpr,

2249

1734

self.client_address)

2250

1735

except KeyError:

2251

1736

return

2252

1737

2253

1738

if client.approval_delay:

2254

1739

delay = client.approval_delay

2255

1740

client.approvals_pending += 1

2256

1741

approval_required = True

2257

1742

2258

1743

while True:

2259

1744

if not client.enabled:

2260

1745

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

2261

client.name)

1746

client.name)

2262

1747

if self.server.use_dbus:

2263

1748

# Emit D-Bus signal

2264

1749

client.Rejected("Disabled")

2265

1750

return

2266

1751

2267

1752

if client.approved or not client.approval_delay:

2268

# We are approved or approval is disabled

1753

#We are approved or approval is disabled

2269

1754

break

2270

1755

elif client.approved is None:

2271

1756

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

2273

1758

if self.server.use_dbus:

2274

1759

# Emit D-Bus signal

2275

1760

client.NeedApproval(

2276

client.approval_delay.total_seconds()

2277

* 1000, client.approved_by_default)

1761

client.approval_delay_milliseconds(),

1762

client.approved_by_default)

2278

1763

else:

2279

1764

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

2280

1765

client.name)

2282

1767

# Emit D-Bus signal

2283

1768

client.Rejected("Denied")

2284

1769

return

2285

2286

# wait until timeout or approved

1770

1771

#wait until timeout or approved

2287

1772

time = datetime.datetime.now()

2288

1773

client.changedstate.acquire()

2289

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

1774

client.changedstate.wait(

1775

float(timedelta_to_milliseconds(delay)

1776

/ 1000))

2290

1777

client.changedstate.release()

2291

1778

time2 = datetime.datetime.now()

2292

1779

if (time2 - time) >= delay:

2302

1789

break

2303

1790

else:

2304

1791

delay -= time2 - time

2305

2306

try:

2307

session.send(client.secret)

2308

except gnutls.Error as error:

2309

logger.warning("gnutls send failed",

2310

exc_info=error)

2311

return

2312

1792

1793

sent_size = 0

1794

while sent_size < len(client.secret):

1795

try:

1796

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

1797

except gnutls.errors.GNUTLSError as error:

1798

logger.warning("gnutls send failed",

1799

exc_info=error)

1800

return

1801

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

1802

sent, len(client.secret)

1803

- (sent_size + sent))

1804

sent_size += sent

1805

2313

1806

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

2314

1807

# bump the timeout using extended_timeout

2315

1808

client.bump_timeout(client.extended_timeout)

2316

1809

if self.server.use_dbus:

2317

1810

# Emit D-Bus signal

2318

1811

client.GotSecret()

2319

1812

2320

1813

finally:

2321

1814

if approval_required:

2322

1815

client.approvals_pending -= 1

2323

1816

try:

2324

1817

session.bye()

2325

except gnutls.Error as error:

1818

except gnutls.errors.GNUTLSError as error:

2326

1819

logger.warning("GnuTLS bye failed",

2327

1820

exc_info=error)

2328

1821

2329

1822

@staticmethod

2330

1823

def peer_certificate(session):

2331

1824

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

2332

1825

# If not an OpenPGP certificate...

2333

if (gnutls.certificate_type_get(session._c_object)

2334

!= gnutls.CRT_OPENPGP):

2335

# ...return invalid data

2336

return b""

1826

if (gnutls.library.functions

1827

.gnutls_certificate_type_get(session._c_object)

1828

!= gnutls.library.constants.GNUTLS_CRT_OPENPGP):

1829

# ...do the normal thing

1830

return session.peer_certificate

2337

1831

list_size = ctypes.c_uint(1)

2338

cert_list = (gnutls.certificate_get_peers

1832

cert_list = (gnutls.library.functions

1833

.gnutls_certificate_get_peers

2339

1834

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

2340

1835

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

2341

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

1836

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

1837

" certificate")

2342

1838

if list_size.value == 0:

2343

1839

return None

2344

1840

cert = cert_list[0]

2345

1841

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

2346

1842

2347

1843

@staticmethod

2348

1844

def fingerprint(openpgp):

2349

1845

"Convert an OpenPGP bytestring to a hexdigit fingerprint"

2350

1846

# New GnuTLS "datum" with the OpenPGP public key

2351

datum = gnutls.datum_t(

2352

ctypes.cast(ctypes.c_char_p(openpgp),

2353

ctypes.POINTER(ctypes.c_ubyte)),

2354

ctypes.c_uint(len(openpgp)))

1847

datum = (gnutls.library.types

1848

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

1849

ctypes.POINTER

1850

(ctypes.c_ubyte)),

1851

ctypes.c_uint(len(openpgp))))

2355

1852

# New empty GnuTLS certificate

2356

crt = gnutls.openpgp_crt_t()

2357

gnutls.openpgp_crt_init(ctypes.byref(crt))

1853

crt = gnutls.library.types.gnutls_openpgp_crt_t()

1854

(gnutls.library.functions

1855

.gnutls_openpgp_crt_init(ctypes.byref(crt)))

2358

1856

# Import the OpenPGP public key into the certificate

2359

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

2360

gnutls.OPENPGP_FMT_RAW)

1857

(gnutls.library.functions

1858

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

1859

gnutls.library.constants

1860

.GNUTLS_OPENPGP_FMT_RAW))

2361

1861

# Verify the self signature in the key

2362

1862

crtverify = ctypes.c_uint()

2363

gnutls.openpgp_crt_verify_self(crt, 0,

2364

ctypes.byref(crtverify))

1863

(gnutls.library.functions

1864

.gnutls_openpgp_crt_verify_self(crt, 0,

1865

ctypes.byref(crtverify)))

2365

1866

if crtverify.value != 0:

2366

gnutls.openpgp_crt_deinit(crt)

2367

raise gnutls.CertificateSecurityError("Verify failed")

1867

gnutls.library.functions.gnutls_openpgp_crt_deinit(crt)

1868

raise (gnutls.errors.CertificateSecurityError

1869

("Verify failed"))

2368

1870

# New buffer for the fingerprint

2369

1871

buf = ctypes.create_string_buffer(20)

2370

1872

buf_len = ctypes.c_size_t()

2371

1873

# Get the fingerprint from the certificate into the buffer

2372

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

2373

ctypes.byref(buf_len))

1874

(gnutls.library.functions

1875

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

1876

ctypes.byref(buf_len)))

2374

1877

# Deinit the certificate

2375

gnutls.openpgp_crt_deinit(crt)

1878

gnutls.library.functions.gnutls_openpgp_crt_deinit(crt)

2376

1879

# Convert the buffer to a Python bytestring

2377

1880

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

2378

1881

# Convert the bytestring to hexadecimal notation

2382

1885

2383

1886

class MultiprocessingMixIn(object):

2384

1887

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

2385

2386

1888

def sub_process_main(self, request, address):

2387

1889

try:

2388

1890

self.finish_request(request, address)

2389

1891

except Exception:

2390

1892

self.handle_error(request, address)

2391

1893

self.close_request(request)

2392

1894

2393

1895

def process_request(self, request, address):

2394

1896

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

2395

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

2396

args=(request, address))

1897

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

1898

args = (request, address))

2397

1899

proc.start()

2398

1900

return proc

2399

1901

2400

1902

2401

1903

class MultiprocessingMixInWithPipe(MultiprocessingMixIn, object):

2402

1904

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

2403

2404

1905

def process_request(self, request, client_address):

2405

1906

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

2406

1907

2407

1908

This function creates a new pipe in self.pipe

2408

1909

"""

2409

1910

parent_pipe, self.child_pipe = multiprocessing.Pipe()

2410

1911

2411

1912

proc = MultiprocessingMixIn.process_request(self, request,

2412

1913

client_address)

2413

1914

self.child_pipe.close()

2414

1915

self.add_pipe(parent_pipe, proc)

2415

1916

2416

1917

def add_pipe(self, parent_pipe, proc):

2417

1918

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

2418

1919

raise NotImplementedError()

2421

1922

class IPv6_TCPServer(MultiprocessingMixInWithPipe,

2422

1923

socketserver.TCPServer, object):

2423

1924

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

2424

1925

2425

1926

Attributes:

2426

1927

enabled: Boolean; whether this server is activated yet

2427

1928

interface: None or a network interface name (string)

2428

1929

use_ipv6: Boolean; to use IPv6 or not

2429

1930

"""

2430

2431

1931

def __init__(self, server_address, RequestHandlerClass,

2432

interface=None,

2433

use_ipv6=True,

2434

socketfd=None):

1932

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

2435

1933

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

2436

1934

creating a new one with socket.socket().

2437

1935

"""

2443

1941

self.socketfd = socketfd

2444

1942

# Save the original socket.socket() function

2445

1943

self.socket_socket = socket.socket

2446

2447

1944

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

2448

#

1945

#

2449

1946

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

2450

1947

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

2451

1948

# patching socket.socket.)

2452

#

1949

#

2453

1950

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

2454

1951

@functools.wraps(socket.socket)

2455

1952

def socket_wrapper(*args, **kwargs):

2467

1964

# socket_wrapper(), if socketfd was set.

2468

1965

socketserver.TCPServer.__init__(self, server_address,

2469

1966

RequestHandlerClass)

2470

1967

2471

1968

def server_bind(self):

2472

1969

"""This overrides the normal server_bind() function

2473

1970

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

2474

1971

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

2475

global SO_BINDTODEVICE

2476

1972

if self.interface is not None:

2477

1973

if SO_BINDTODEVICE is None:

2478

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

2479

# common enough.

2480

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

2481

SO_BINDTODEVICE = 25

2482

try:

2483

self.socket.setsockopt(

2484

socket.SOL_SOCKET, SO_BINDTODEVICE,

2485

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

2486

except socket.error as error:

2487

if error.errno == errno.EPERM:

2488

logger.error("No permission to bind to"

2489

" interface %s", self.interface)

2490

elif error.errno == errno.ENOPROTOOPT:

2491

logger.error("SO_BINDTODEVICE not available;"

2492

" cannot bind to interface %s",

2493

self.interface)

2494

elif error.errno == errno.ENODEV:

2495

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

2496

" cannot bind", self.interface)

2497

else:

2498

raise

1974

logger.error("SO_BINDTODEVICE does not exist;"

1975

" cannot bind to interface %s",

1976

self.interface)

1977

else:

1978

try:

1979

self.socket.setsockopt(socket.SOL_SOCKET,

1980

SO_BINDTODEVICE,

1981

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

1982

except socket.error as error:

1983

if error.errno == errno.EPERM:

1984

logger.error("No permission to bind to"

1985

" interface %s", self.interface)

1986

elif error.errno == errno.ENOPROTOOPT:

1987

logger.error("SO_BINDTODEVICE not available;"

1988

" cannot bind to interface %s",

1989

self.interface)

1990

elif error.errno == errno.ENODEV:

1991

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

1992

" cannot bind", self.interface)

1993

else:

1994

raise

2499

1995

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

2500

1996

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

2501

1997

if not self.server_address[0]:

2502

1998

if self.address_family == socket.AF_INET6:

2503

any_address = "::" # in6addr_any

1999

any_address = "::" # in6addr_any

2504

2000

else:

2505

any_address = "0.0.0.0" # INADDR_ANY

2001

any_address = "0.0.0.0" # INADDR_ANY

2506

2002

self.server_address = (any_address,

2507

2003

self.server_address[1])

2508

2004

elif not self.server_address[1]:

2509

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

2005

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

2006

0)

2510

2007

# if self.interface:

2511

2008

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

2512

2009

# 0, # port

2518

2015

2519

2016

class MandosServer(IPv6_TCPServer):

2520

2017

"""Mandos server.

2521

2018

2522

2019

Attributes:

2523

2020

clients: set of Client objects

2524

2021

gnutls_priority GnuTLS priority string

2525

2022

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

2526

2527

Assumes a GLib.MainLoop event loop.

2023

2024

Assumes a gobject.MainLoop event loop.

2528

2025

"""

2529

2530

2026

def __init__(self, server_address, RequestHandlerClass,

2531

interface=None,

2532

use_ipv6=True,

2533

clients=None,

2534

gnutls_priority=None,

2535

use_dbus=True,

2536

socketfd=None):

2027

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

2028

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

2537

2029

self.enabled = False

2538

2030

self.clients = clients

2539

2031

if self.clients is None:

2542

2034

self.gnutls_priority = gnutls_priority

2543

2035

IPv6_TCPServer.__init__(self, server_address,

2544

2036

RequestHandlerClass,

2545

interface=interface,

2546

use_ipv6=use_ipv6,

2547

socketfd=socketfd)

2548

2037

interface = interface,

2038

use_ipv6 = use_ipv6,

2039

socketfd = socketfd)

2549

2040

def server_activate(self):

2550

2041

if self.enabled:

2551

2042

return socketserver.TCPServer.server_activate(self)

2552

2043

2553

2044

def enable(self):

2554

2045

self.enabled = True

2555

2046

2556

2047

def add_pipe(self, parent_pipe, proc):

2557

2048

# Call "handle_ipc" for both data and EOF events

2558

GLib.io_add_watch(

2559

parent_pipe.fileno(),

2560

GLib.IO_IN | GLib.IO_HUP,

2561

functools.partial(self.handle_ipc,

2562

parent_pipe=parent_pipe,

2563

proc=proc))

2564

2565

def handle_ipc(self, source, condition,

2566

parent_pipe=None,

2567

proc=None,

2568

client_object=None):

2049

gobject.io_add_watch(parent_pipe.fileno(),

2050

gobject.IO_IN | gobject.IO_HUP,

2051

functools.partial(self.handle_ipc,

2052

parent_pipe =

2053

parent_pipe,

2054

proc = proc))

2055

2056

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

2057

proc = None, client_object=None):

2569

2058

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

2570

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

2059

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

2571

2060

# Wait for other process to exit

2572

2061

proc.join()

2573

2062

return False

2574

2063

2575

2064

# Read a request from the child

2576

2065

request = parent_pipe.recv()

2577

2066

command = request[0]

2578

2067

2579

2068

if command == 'init':

2580

2069

fpr = request[1]

2581

2070

address = request[2]

2582

2583

for c in self.clients.values():

2071

2072

for c in self.clients.itervalues():

2584

2073

if c.fingerprint == fpr:

2585

2074

client = c

2586

2075

break

2593

2082

address[0])

2594

2083

parent_pipe.send(False)

2595

2084

return False

2596

2597

GLib.io_add_watch(

2598

parent_pipe.fileno(),

2599

GLib.IO_IN | GLib.IO_HUP,

2600

functools.partial(self.handle_ipc,

2601

parent_pipe=parent_pipe,

2602

proc=proc,

2603

client_object=client))

2085

2086

gobject.io_add_watch(parent_pipe.fileno(),

2087

gobject.IO_IN | gobject.IO_HUP,

2088

functools.partial(self.handle_ipc,

2089

parent_pipe =

2090

parent_pipe,

2091

proc = proc,

2092

client_object =

2093

client))

2604

2094

parent_pipe.send(True)

2605

2095

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

2606

2096

# same fileno

2609

2099

funcname = request[1]

2610

2100

args = request[2]

2611

2101

kwargs = request[3]

2612

2102

2613

2103

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

2614

2104

funcname)(*args,

2615

**kwargs)))

2616

2105

**kwargs)))

2106

2617

2107

if command == 'getattr':

2618

2108

attrname = request[1]

2619

if isinstance(client_object.__getattribute__(attrname),

2620

collections.Callable):

2621

parent_pipe.send(('function', ))

2109

if callable(client_object.__getattribute__(attrname)):

2110

parent_pipe.send(('function',))

2622

2111

else:

2623

parent_pipe.send((

2624

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

2625

2112

parent_pipe.send(('data', client_object

2113

.__getattribute__(attrname)))

2114

2626

2115

if command == 'setattr':

2627

2116

attrname = request[1]

2628

2117

value = request[2]

2629

2118

setattr(client_object, attrname, value)

2630

2119

2631

2120

return True

2632

2121

2633

2122

2634

2123

def rfc3339_duration_to_delta(duration):

2635

2124

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

2636

2125

2637

2126

>>> rfc3339_duration_to_delta("P7D")

2638

2127

datetime.timedelta(7)

2639

2128

>>> rfc3339_duration_to_delta("PT60S")

2649

2138

>>> rfc3339_duration_to_delta("P1DT3M20S")

2650

2139

datetime.timedelta(1, 200)

2651

2140

"""

2652

2141

2653

2142

# Parsing an RFC 3339 duration with regular expressions is not

2654

2143

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

2655

2144

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

2656

2145

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

2657

2146

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

2658

2147

# avoid excessive use of external libraries.

2659

2148

2660

2149

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

2661

Token = collections.namedtuple("Token", (

2662

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

2663

# a "group" containing digits

2664

"value", # datetime.timedelta or None

2665

"followers")) # Tokens valid after this token

2150

Token = collections.namedtuple("Token",

2151

("regexp", # To match token; if

2152

# "value" is not None,

2153

# must have a "group"

2154

# containing digits

2155

"value", # datetime.timedelta or

2156

# None

2157

"followers")) # Tokens valid after

2158

# this token

2666

2159

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

2667

2160

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

2668

2161

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

2669

2162

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

2670

2163

datetime.timedelta(seconds=1),

2671

frozenset((token_end, )))

2164

frozenset((token_end,)))

2672

2165

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

2673

2166

datetime.timedelta(minutes=1),

2674

2167

frozenset((token_second, token_end)))

2690

2183

frozenset((token_month, token_end)))

2691

2184

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

2692

2185

datetime.timedelta(weeks=1),

2693

frozenset((token_end, )))

2186

frozenset((token_end,)))

2694

2187

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

2695

2188

frozenset((token_year, token_month,

2696

2189

token_day, token_time,

2697

token_week)))

2698

# Define starting values:

2699

# Value so far

2700

value = datetime.timedelta()

2190

token_week))),

2191

# Define starting values

2192

value = datetime.timedelta() # Value so far

2701

2193

found_token = None

2702

# Following valid tokens

2703

followers = frozenset((token_duration, ))

2704

# String left to parse

2705

s = duration

2194

followers = frozenset(token_duration,) # Following valid tokens

2195

s = duration # String left to parse

2706

2196

# Loop until end token is found

2707

2197

while found_token is not token_end:

2708

2198

# Search for any currently valid tokens

2724

2214

break

2725

2215

else:

2726

2216

# No currently valid tokens were found

2727

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

2728

.format(duration))

2217

raise ValueError("Invalid RFC 3339 duration")

2729

2218

# End token found

2730

2219

return value

2731

2220

2732

2221

2733

2222

def string_to_delta(interval):

2734

2223

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

2735

2224

2736

2225

>>> string_to_delta('7d')

2737

2226

datetime.timedelta(7)

2738

2227

>>> string_to_delta('60s')

2746

2235

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

2747

2236

datetime.timedelta(0, 330)

2748

2237

"""

2749

2238

2750

2239

try:

2751

2240

return rfc3339_duration_to_delta(interval)

2752

2241

except ValueError:

2753

2242

pass

2754

2243

2755

2244

timevalue = datetime.timedelta(0)

2756

2245

for s in interval.split():

2757

2246

try:

2758

suffix = s[-1]

2247

suffix = unicode(s[-1])

2759

2248

value = int(s[:-1])

2760

2249

if suffix == "d":

2761

2250

delta = datetime.timedelta(value)

2768

2257

elif suffix == "w":

2769

2258

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

2770

2259

else:

2771

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

2260

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

2261

.format(suffix))

2772

2262

except IndexError as e:

2773

2263

raise ValueError(*(e.args))

2774

2264

timevalue += delta

2775

2265

return timevalue

2776

2266

2777

2267

2778

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

2268

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

2779

2269

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

2780

2270

2781

2271

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

2782

2272

if os.fork():

2783

2273

sys.exit()

2791

2281

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

2792

2282

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

2793

2283

raise OSError(errno.ENODEV,

2794

"{} not a character device"

2284

"{0} not a character device"

2795

2285

.format(os.devnull))

2796

2286

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

2797

2287

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

2801

2291

2802

2292

2803

2293

def main():

2804

2294

2805

2295

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

2806

2296

# Parsing of options, both command line and config file

2807

2297

2808

2298

parser = argparse.ArgumentParser()

2809

2299

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

2810

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

2300

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

2811

2301

help="show version number and exit")

2812

2302

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

2813

2303

help="Bind to interface IF")

2846

2336

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

2847

2337

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

2848

2338

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

2849

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

2850

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

2851

default=None)

2852

2339

2853

2340

options = parser.parse_args()

2854

2341

2855

2342

if options.check:

2856

2343

import doctest

2857

2344

fail_count, test_count = doctest.testmod()

2858

2345

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

2859

2346

2860

2347

# Default values for config file for server-global settings

2861

server_defaults = {"interface": "",

2862

"address": "",

2863

"port": "",

2864

"debug": "False",

2865

"priority":

2866

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

2867

":+SIGN-DSA-SHA256",

2868

"servicename": "Mandos",

2869

"use_dbus": "True",

2870

"use_ipv6": "True",

2871

"debuglevel": "",

2872

"restore": "True",

2873

"socket": "",

2874

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

2875

"foreground": "False",

2876

"zeroconf": "True",

2877

}

2878

2348

server_defaults = { "interface": "",

2349

"address": "",

2350

"port": "",

2351

"debug": "False",

2352

"priority":

2353

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

2354

"servicename": "Mandos",

2355

"use_dbus": "True",

2356

"use_ipv6": "True",

2357

"debuglevel": "",

2358

"restore": "True",

2359

"socket": "",

2360

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

2361

"foreground": "False",

2362

}

2363

2879

2364

# Parse config file for server-global settings

2880

2365

server_config = configparser.SafeConfigParser(server_defaults)

2881

2366

del server_defaults

2882

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

2367

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

2368

"mandos.conf"))

2883

2369

# Convert the SafeConfigParser object to a dict

2884

2370

server_settings = server_config.defaults()

2885

2371

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

2886

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

2887

"foreground", "zeroconf"):

2372

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

2888

2373

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

2889

2374

option)

2890

2375

if server_settings["port"]:

2900

2385

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

2901

2386

["socket"])

2902

2387

del server_config

2903

2388

2904

2389

# Override the settings from the config file with command line

2905

2390

# options, if set.

2906

2391

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

2907

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

2908

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

2909

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

2392

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

2393

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

2394

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

2910

2395

value = getattr(options, option)

2911

2396

if value is not None:

2912

2397

server_settings[option] = value

2913

2398

del options

2914

2399

# Force all strings to be unicode

2915

2400

for option in server_settings.keys():

2916

if isinstance(server_settings[option], bytes):

2917

server_settings[option] = (server_settings[option]

2918

.decode("utf-8"))

2401

if type(server_settings[option]) is str:

2402

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

2919

2403

# Force all boolean options to be boolean

2920

2404

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

2921

"foreground", "zeroconf"):

2405

"foreground"):

2922

2406

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

2923

2407

# Debug implies foreground

2924

2408

if server_settings["debug"]:

2925

2409

server_settings["foreground"] = True

2926

2410

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

2927

2411

2928

2412

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

2929

2930

if (not server_settings["zeroconf"]

2931

and not (server_settings["port"]

2932

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

2933

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

2934

2413

2935

2414

# For convenience

2936

2415

debug = server_settings["debug"]

2937

2416

debuglevel = server_settings["debuglevel"]

2940

2419

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

2941

2420

stored_state_file)

2942

2421

foreground = server_settings["foreground"]

2943

zeroconf = server_settings["zeroconf"]

2944

2422

2945

2423

if debug:

2946

2424

initlogger(debug, logging.DEBUG)

2947

2425

else:

2950

2428

else:

2951

2429

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

2952

2430

initlogger(debug, level)

2953

2431

2954

2432

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

2955

syslogger.setFormatter(

2956

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

2957

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

2958

server_settings["servicename"])))

2959

2433

syslogger.setFormatter(logging.Formatter

2434

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

2435

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

2436

.format(server_settings

2437

["servicename"])))

2438

2960

2439

# Parse config file with clients

2961

2440

client_config = configparser.SafeConfigParser(Client

2962

2441

.client_defaults)

2963

2442

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

2964

2443

"clients.conf"))

2965

2444

2966

2445

global mandos_dbus_service

2967

2446

mandos_dbus_service = None

2968

2969

socketfd = None

2970

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

2971

socketfd = server_settings["socket"]

2972

tcp_server = MandosServer(

2973

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

2974

ClientHandler,

2975

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

2976

use_ipv6=use_ipv6,

2977

gnutls_priority=server_settings["priority"],

2978

use_dbus=use_dbus,

2979

socketfd=socketfd)

2447

2448

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

2449

server_settings["port"]),

2450

ClientHandler,

2451

interface=(server_settings["interface"]

2452

or None),

2453

use_ipv6=use_ipv6,

2454

gnutls_priority=

2455

server_settings["priority"],

2456

use_dbus=use_dbus,

2457

socketfd=(server_settings["socket"]

2458

or None))

2980

2459

if not foreground:

2981

2460

pidfilename = "/run/mandos.pid"

2982

2461

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

2983

2462

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

2984

2463

pidfile = None

2985

2464

try:

2986

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

2465

pidfile = open(pidfilename, "w")

2987

2466

except IOError as e:

2988

2467

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

2989

2468

exc_info=e)

2990

2991

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

2992

("mandos", "mandos"),

2993

("nobody", "nogroup")):

2469

2470

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

2994

2471

try:

2995

2472

uid = pwd.getpwnam(name).pw_uid

2996

gid = pwd.getpwnam(group).pw_gid

2473

gid = pwd.getpwnam(name).pw_gid

2997

2474

break

2998

2475

except KeyError:

2999

2476

continue

3003

2480

try:

3004

2481

os.setgid(gid)

3005

2482

os.setuid(uid)

3006

if debug:

3007

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

3008

gid))

3009

2483

except OSError as error:

3010

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

3011

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

3012

2484

if error.errno != errno.EPERM:

3013

2485

raise

3014

2486

3015

2487

if debug:

3016

2488

# Enable all possible GnuTLS debugging

3017

2489

3018

2490

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

3019

2491

# - GnuTLS manual

3020

gnutls.global_set_log_level(11)

3021

3022

@gnutls.log_func

2492

gnutls.library.functions.gnutls_global_set_log_level(11)

2493

2494

@gnutls.library.types.gnutls_log_func

3023

2495

def debug_gnutls(level, string):

3024

2496

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

3025

3026

gnutls.global_set_log_function(debug_gnutls)

3027

2497

2498

(gnutls.library.functions

2499

.gnutls_global_set_log_function(debug_gnutls))

2500

3028

2501

# Redirect stdin so all checkers get /dev/null

3029

2502

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

3030

2503

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

3031

2504

if null > 2:

3032

2505

os.close(null)

3033

2506

3034

2507

# Need to fork before connecting to D-Bus

3035

2508

if not foreground:

3036

2509

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

3037

2510

daemon()

3038

3039

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

3040

# to inform GLib that threads will be used.

3041

GLib.threads_init()

3042

2511

2512

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

2513

# need to inform gobject that threads will be used.

2514

gobject.threads_init()

2515

3043

2516

global main_loop

3044

2517

# From the Avahi example code

3045

2518

DBusGMainLoop(set_as_default=True)

3046

main_loop = GLib.MainLoop()

2519

main_loop = gobject.MainLoop()

3047

2520

bus = dbus.SystemBus()

3048

2521

# End of Avahi example code

3049

2522

if use_dbus:

3050

2523

try:

3051

2524

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

3052

bus,

3053

do_not_queue=True)

3054

old_bus_name = dbus.service.BusName(

3055

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

3056

do_not_queue=True)

3057

except dbus.exceptions.DBusException as e:

2525

bus, do_not_queue=True)

2526

old_bus_name = (dbus.service.BusName

2527

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

2528

do_not_queue=True))

2529

except dbus.exceptions.NameExistsException as e:

3058

2530

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

3059

2531

use_dbus = False

3060

2532

server_settings["use_dbus"] = False

3061

2533

tcp_server.use_dbus = False

3062

if zeroconf:

3063

protocol = avahi.PROTO_INET6 if use_ipv6 else avahi.PROTO_INET

3064

service = AvahiServiceToSyslog(

3065

name=server_settings["servicename"],

3066

servicetype="_mandos._tcp",

3067

protocol=protocol,

3068

bus=bus)

3069

if server_settings["interface"]:

3070

service.interface = if_nametoindex(

3071

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

3072

2534

protocol = avahi.PROTO_INET6 if use_ipv6 else avahi.PROTO_INET

2535

service = AvahiServiceToSyslog(name =

2536

server_settings["servicename"],

2537

servicetype = "_mandos._tcp",

2538

protocol = protocol, bus = bus)

2539

if server_settings["interface"]:

2540

service.interface = (if_nametoindex

2541

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

2542

3073

2543

global multiprocessing_manager

3074

2544

multiprocessing_manager = multiprocessing.Manager()

3075

2545

3076

2546

client_class = Client

3077

2547

if use_dbus:

3078

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

3079

2548

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

2549

3080

2550

client_settings = Client.config_parser(client_config)

3081

2551

old_client_settings = {}

3082

2552

clients_data = {}

3083

2553

3084

2554

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

3085

2555

global wnull

3086

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

2556

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

3087

2557

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

3088

2558

# mode

3089

2559

if debug or not foreground:

3090

2560

wnull.close()

3091

2561

3092

2562

# Get client data and settings from last running state.

3093

2563

if server_settings["restore"]:

3094

2564

try:

3095

2565

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

3096

if sys.version_info.major == 2:

3097

clients_data, old_client_settings = pickle.load(

3098

stored_state)

3099

else:

3100

bytes_clients_data, bytes_old_client_settings = (

3101

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

3102

# Fix bytes to strings

3103

# clients_data

3104

# .keys()

3105

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

3106

if isinstance(key, bytes)

3107

else key): value

3108

for key, value in

3109

bytes_clients_data.items()}

3110

del bytes_clients_data

3111

for key in clients_data:

3112

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

3113

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

3114

for k, v in

3115

clients_data[key].items()}

3116

clients_data[key] = value

3117

# .client_structure

3118

value["client_structure"] = [

3119

(s.decode("utf-8")

3120

if isinstance(s, bytes)

3121

else s) for s in

3122

value["client_structure"]]

3123

# .name & .host

3124

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

3125

if isinstance(value[k], bytes):

3126

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

3127

# old_client_settings

3128

# .keys()

3129

old_client_settings = {

3130

(key.decode("utf-8")

3131

if isinstance(key, bytes)

3132

else key): value

3133

for key, value in

3134

bytes_old_client_settings.items()}

3135

del bytes_old_client_settings

3136

# .host

3137

for value in old_client_settings.values():

3138

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

3139

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

3140

.decode("utf-8"))

2566

clients_data, old_client_settings = (pickle.load

2567

(stored_state))

3141

2568

os.remove(stored_state_path)

3142

2569

except IOError as e:

3143

2570

if e.errno == errno.ENOENT:

3144

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

3145

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

2571

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

2572

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

3146

2573

else:

3147

2574

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

3148

2575

exc_info=e)

3149

2576

raise

3150

2577

except EOFError as e:

3151

2578

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

3152

"EOFError:",

3153

exc_info=e)

3154

2579

"EOFError:", exc_info=e)

2580

3155

2581

with PGPEngine() as pgp:

3156

for client_name, client in clients_data.items():

2582

for client_name, client in clients_data.iteritems():

3157

2583

# Skip removed clients

3158

2584

if client_name not in client_settings:

3159

2585

continue

3160

2586

3161

2587

# Decide which value to use after restoring saved state.

3162

2588

# We have three different values: Old config file,

3163

2589

# new config file, and saved state.

3168

2594

# For each value in new config, check if it

3169

2595

# differs from the old config value (Except for

3170

2596

# the "secret" attribute)

3171

if (name != "secret"

3172

and (value !=

3173

old_client_settings[client_name][name])):

2597

if (name != "secret" and

2598

value != old_client_settings[client_name]

2599

[name]):

3174

2600

client[name] = value

3175

2601

except KeyError:

3176

2602

pass

3177

2603

3178

2604

# Clients who has passed its expire date can still be

3179

# enabled if its last checker was successful. A Client

2605

# enabled if its last checker was successful. Clients

3180

2606

# whose checker succeeded before we stored its state is

3181

2607

# assumed to have successfully run all checkers during

3182

2608

# downtime.

3184

2610

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

3185

2611

if not client["last_checked_ok"]:

3186

2612

logger.warning(

3187

"disabling client {} - Client never "

3188

"performed a successful checker".format(

3189

client_name))

2613

"disabling client {0} - Client never "

2614

"performed a successful checker"

2615

.format(client_name))

3190

2616

client["enabled"] = False

3191

2617

elif client["last_checker_status"] != 0:

3192

2618

logger.warning(

3193

"disabling client {} - Client last"

3194

" checker failed with error code"

3195

" {}".format(

3196

client_name,

3197

client["last_checker_status"]))

2619

"disabling client {0} - Client "

2620

"last checker failed with error code {1}"

2621

.format(client_name,

2622

client["last_checker_status"]))

3198

2623

client["enabled"] = False

3199

2624

else:

3200

client["expires"] = (

3201

datetime.datetime.utcnow()

3202

+ client["timeout"])

2625

client["expires"] = (datetime.datetime

2626

.utcnow()

2627

+ client["timeout"])

3203

2628

logger.debug("Last checker succeeded,"

3204

" keeping {} enabled".format(

3205

client_name))

2629

" keeping {0} enabled"

2630

.format(client_name))

3206

2631

try:

3207

client["secret"] = pgp.decrypt(

3208

client["encrypted_secret"],

3209

client_settings[client_name]["secret"])

2632

client["secret"] = (

2633

pgp.decrypt(client["encrypted_secret"],

2634

client_settings[client_name]

2635

["secret"]))

3210

2636

except PGPError:

3211

2637

# If decryption fails, we use secret from new settings

3212

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

3213

client_name))

3214

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

3215

["secret"])

3216

2638

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

2639

.format(client_name))

2640

client["secret"] = (

2641

client_settings[client_name]["secret"])

2642

3217

2643

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

3218

2644

for client_name in (set(old_client_settings)

3219

2645

- set(client_settings)):

3221

2647

for client_name in (set(client_settings)

3222

2648

- set(old_client_settings)):

3223

2649

clients_data[client_name] = client_settings[client_name]

3224

2650

3225

2651

# Create all client objects

3226

for client_name, client in clients_data.items():

2652

for client_name, client in clients_data.iteritems():

3227

2653

tcp_server.clients[client_name] = client_class(

3228

name=client_name,

3229

settings=client,

3230

server_settings=server_settings)

3231

2654

name = client_name, settings = client,

2655

server_settings = server_settings)

2656

3232

2657

if not tcp_server.clients:

3233

2658

logger.warning("No clients defined")

3234

2659

3235

2660

if not foreground:

3236

2661

if pidfile is not None:

3237

pid = os.getpid()

3238

2662

try:

3239

2663

with pidfile:

3240

print(pid, file=pidfile)

2664

pid = os.getpid()

2665

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

3241

2666

except IOError:

3242

2667

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

3243

2668

pidfilename, pid)

3244

2669

del pidfile

3245

2670

del pidfilename

3246

3247

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

3248

GLib.unix_signal_add(GLib.PRIORITY_HIGH, termsig,

3249

lambda: main_loop.quit() and False)

3250

2671

2672

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

2673

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

2674

3251

2675

if use_dbus:

3252

3253

@alternate_dbus_interfaces(

3254

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

3255

class MandosDBusService(DBusObjectWithObjectManager):

2676

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

2677

"se.bsnet.fukt.Mandos"})

2678

class MandosDBusService(DBusObjectWithProperties):

3256

2679

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

3257

3258

2680

def __init__(self):

3259

2681

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

3260

3261

2682

_interface = "se.recompile.Mandos"

3262

2683

2684

@dbus_interface_annotations(_interface)

2685

def _foo(self):

2686

return { "org.freedesktop.DBus.Property"

2687

".EmitsChangedSignal":

2688

"false"}

2689

3263

2690

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

3264

2691

def ClientAdded(self, objpath):

3265

2692

"D-Bus signal"

3266

2693

pass

3267

2694

3268

2695

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

3269

2696

def ClientNotFound(self, fingerprint, address):

3270

2697

"D-Bus signal"

3271

2698

pass

3272

3273

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

3274

"true"})

2699

3275

2700

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

3276

2701

def ClientRemoved(self, objpath, name):

3277

2702

"D-Bus signal"

3278

2703

pass

3279

3280

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

3281

"true"})

2704

3282

2705

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

3283

2706

def GetAllClients(self):

3284

2707

"D-Bus method"

3285

return dbus.Array(c.dbus_object_path for c in

3286

tcp_server.clients.values())

3287

3288

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

3289

"true"})

2708

return dbus.Array(c.dbus_object_path

2709

for c in

2710

tcp_server.clients.itervalues())

2711

3290

2712

@dbus.service.method(_interface,

3291

2713

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

3292

2714

def GetAllClientsWithProperties(self):

3293

2715

"D-Bus method"

3294

2716

return dbus.Dictionary(

3295

{c.dbus_object_path: c.GetAll(

3296

"se.recompile.Mandos.Client")

3297

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

2717

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

2718

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

3298

2719

signature="oa{sv}")

3299

2720

3300

2721

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

3301

2722

def RemoveClient(self, object_path):

3302

2723

"D-Bus method"

3303

for c in tcp_server.clients.values():

2724

for c in tcp_server.clients.itervalues():

3304

2725

if c.dbus_object_path == object_path:

3305

2726

del tcp_server.clients[c.name]

3306

2727

c.remove_from_connection()

3307

# Don't signal the disabling

2728

# Don't signal anything except ClientRemoved

3308

2729

c.disable(quiet=True)

3309

# Emit D-Bus signal for removal

3310

self.client_removed_signal(c)

2730

# Emit D-Bus signal

2731

self.ClientRemoved(object_path, c.name)

3311

2732

return

3312

2733

raise KeyError(object_path)

3313

2734

3314

2735

del _interface

3315

3316

@dbus.service.method(dbus.OBJECT_MANAGER_IFACE,

3317

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

3318

def GetManagedObjects(self):

3319

"""D-Bus method"""

3320

return dbus.Dictionary(

3321

{client.dbus_object_path:

3322

dbus.Dictionary(

3323

{interface: client.GetAll(interface)

3324

for interface in

3325

client._get_all_interface_names()})

3326

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

3327

3328

def client_added_signal(self, client):

3329

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

3330

if use_dbus:

3331

# New standard signal

3332

self.InterfacesAdded(

3333

client.dbus_object_path,

3334

dbus.Dictionary(

3335

{interface: client.GetAll(interface)

3336

for interface in

3337

client._get_all_interface_names()}))

3338

# Old signal

3339

self.ClientAdded(client.dbus_object_path)

3340

3341

def client_removed_signal(self, client):

3342

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

3343

if use_dbus:

3344

# New standard signal

3345

self.InterfacesRemoved(

3346

client.dbus_object_path,

3347

client._get_all_interface_names())

3348

# Old signal

3349

self.ClientRemoved(client.dbus_object_path,

3350

client.name)

3351

2736

3352

2737

mandos_dbus_service = MandosDBusService()

3353

3354

# Save modules to variables to exempt the modules from being

3355

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

3356

mp = multiprocessing

3357

wn = wnull

3358

2738

3359

2739

def cleanup():

3360

2740

"Cleanup function; run on exit"

3361

if zeroconf:

3362

service.cleanup()

3363

3364

mp.active_children()

3365

wn.close()

2741

service.cleanup()

2742

2743

multiprocessing.active_children()

2744

wnull.close()

3366

2745

if not (tcp_server.clients or client_settings):

3367

2746

return

3368

2747

3369

2748

# Store client before exiting. Secrets are encrypted with key

3370

2749

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

3371

2750

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

3372

2751

clients = {}

3373

2752

with PGPEngine() as pgp:

3374

for client in tcp_server.clients.values():

2753

for client in tcp_server.clients.itervalues():

3375

2754

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

3376

2755

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

3377

2756

key)

3378

2757

client_dict = {}

3379

2758

3380

2759

# A list of attributes that can not be pickled

3381

2760

# + secret.

3382

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

3383

"checker", "server_settings"}

3384

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

3385

.Object):

2761

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

2762

"checker", "server_settings"))

2763

for name, typ in (inspect.getmembers

2764

(dbus.service.Object)):

3386

2765

exclude.add(name)

3387

2766

3388

2767

client_dict["encrypted_secret"] = (client

3389

2768

.encrypted_secret)

3390

2769

for attr in client.client_structure:

3391

2770

if attr not in exclude:

3392

2771

client_dict[attr] = getattr(client, attr)

3393

2772

3394

2773

clients[client.name] = client_dict

3395

2774

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

3396

2775

3397

2776

try:

3398

with tempfile.NamedTemporaryFile(

3399

mode='wb',

3400

suffix=".pickle",

3401

prefix='clients-',

3402

dir=os.path.dirname(stored_state_path),

3403

delete=False) as stored_state:

3404

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

3405

protocol=2)

3406

tempname = stored_state.name

2777

with (tempfile.NamedTemporaryFile

2778

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

2779

dir=os.path.dirname(stored_state_path),

2780

delete=False)) as stored_state:

2781

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

2782

tempname=stored_state.name

3407

2783

os.rename(tempname, stored_state_path)

3408

2784

except (IOError, OSError) as e:

3409

2785

if not debug:

3412

2788

except NameError:

3413

2789

pass

3414

2790

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

3415

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

2791

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

3416

2792

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

3417

2793

else:

3418

2794

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

3419

2795

exc_info=e)

3420

2796

raise

3421

2797

3422

2798

# Delete all clients, and settings from config

3423

2799

while tcp_server.clients:

3424

2800

name, client = tcp_server.clients.popitem()

3425

2801

if use_dbus:

3426

2802

client.remove_from_connection()

3427

# Don't signal the disabling

2803

# Don't signal anything except ClientRemoved

3428

2804

client.disable(quiet=True)

3429

# Emit D-Bus signal for removal

3430

2805

if use_dbus:

3431

mandos_dbus_service.client_removed_signal(client)

2806

# Emit D-Bus signal

2807

mandos_dbus_service.ClientRemoved(client

2808

.dbus_object_path,

2809

client.name)

3432

2810

client_settings.clear()

3433

2811

3434

2812

atexit.register(cleanup)

3435

3436

for client in tcp_server.clients.values():

2813

2814

for client in tcp_server.clients.itervalues():

3437

2815

if use_dbus:

3438

# Emit D-Bus signal for adding

3439

mandos_dbus_service.client_added_signal(client)

2816

# Emit D-Bus signal

2817

mandos_dbus_service.ClientAdded(client.dbus_object_path)

3440

2818

# Need to initiate checking of clients

3441

2819

if client.enabled:

3442

2820

client.init_checker()

3443

2821

3444

2822

tcp_server.enable()

3445

2823

tcp_server.server_activate()

3446

2824

3447

2825

# Find out what port we got

3448

if zeroconf:

3449

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

2826

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

3450

2827

if use_ipv6:

3451

2828

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

3452

2829

" flowinfo %d, scope_id %d",

3454

2831

else: # IPv4

3455

2832

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

3456

2833

*tcp_server.socket.getsockname())

3457

3458

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

3459

2834

2835

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

2836

3460

2837

try:

3461

if zeroconf:

3462

# From the Avahi example code

3463

try:

3464

service.activate()

3465

except dbus.exceptions.DBusException as error:

3466

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

3467

cleanup()

3468

sys.exit(1)

3469

# End of Avahi example code

3470

3471

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

3472

lambda *args, **kwargs:

3473

(tcp_server.handle_request

3474

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

3475

2838

# From the Avahi example code

2839

try:

2840

service.activate()

2841

except dbus.exceptions.DBusException as error:

2842

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

2843

cleanup()

2844

sys.exit(1)

2845

# End of Avahi example code

2846

2847

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

2848

lambda *args, **kwargs:

2849

(tcp_server.handle_request

2850

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

2851

3476

2852

logger.debug("Starting main loop")

3477

2853

main_loop.run()

3478

2854

except AvahiError as error:

3487

2863

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

3488

2864

cleanup()

3489

2865

3490

3491

2866

if __name__ == '__main__':

3492

2867

main()