/mandos/trunk : revision 879

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

from future_builtins import *

37

try:

38

from future_builtins import *

39

except ImportError:

40

pass

38

41

39

import SocketServer as socketserver

42

try:

43

import SocketServer as socketserver

44

except ImportError:

45

import socketserver

40

46

import socket

41

47

import argparse

42

48

import datetime

43

49

import errno

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

50

try:

51

import ConfigParser as configparser

52

except ImportError:

53

import configparser

51

54

import sys

52

55

import re

53

56

import os

62

65

import struct

63

66

import fcntl

64

67

import functools

65

import cPickle as pickle

68

try:

69

import cPickle as pickle

70

except ImportError:

71

import pickle

66

72

import multiprocessing

67

73

import types

68

74

import binascii

69

75

import tempfile

70

76

import itertools

71

77

import collections

78

import codecs

72

79

73

80

import dbus

74

81

import dbus.service

75

import gobject

76

import avahi

82

from gi.repository import GLib

77

83

from dbus.mainloop.glib import DBusGMainLoop

78

84

import ctypes

79

85

import ctypes.util

80

86

import xml.dom.minidom

81

87

import inspect

82

88

89

# Try to find the value of SO_BINDTODEVICE:

83

90

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:

84

93

SO_BINDTODEVICE = socket.SO_BINDTODEVICE

85

94

except AttributeError:

86

95

try:

96

# This is where SO_BINDTODEVICE was up to and including Python

97

# 2.6, and also 3.2:

87

98

from IN import SO_BINDTODEVICE

88

99

except ImportError:

89

SO_BINDTODEVICE = None

90

91

version = "1.6.4"

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 = "1.7.12"

92

118

stored_state_file = "clients.pickle"

93

119

94

120

logger = logging.getLogger()

95

121

syslogger = None

96

122

97

123

try:

98

if_nametoindex = (ctypes.cdll.LoadLibrary

99

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

100

.if_nametoindex)

124

if_nametoindex = ctypes.cdll.LoadLibrary(

125

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

101

126

except (OSError, AttributeError):

127

102

128

def if_nametoindex(interface):

103

129

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

104

130

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

105

131

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

106

132

ifreq = fcntl.ioctl(s, SIOCGIFINDEX,

107

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

108

interface))

109

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

110

ifreq[16:20])[0]

133

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

134

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

111

135

return interface_index

112

136

113

137

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

114

154

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

115

155

"""init logger and add loglevel"""

116

117

syslogger = (logging.handlers.SysLogHandler

118

(facility =

119

logging.handlers.SysLogHandler.LOG_DAEMON,

120

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

156

157

global syslogger

158

syslogger = (logging.handlers.SysLogHandler(

159

facility=logging.handlers.SysLogHandler.LOG_DAEMON,

160

address="/dev/log"))

121

161

syslogger.setFormatter(logging.Formatter

122

162

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

123

163

' %(message)s'))

124

164

logger.addHandler(syslogger)

125

165

126

166

if debug:

127

167

console = logging.StreamHandler()

128

168

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

140

180

141

181

class PGPEngine(object):

142

182

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

183

143

184

def __init__(self):

144

185

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

145

197

self.gnupgargs = ['--batch',

146

'--home', self.tempdir,

198

'--homedir', self.tempdir,

147

199

'--force-mdc',

148

'--quiet',

149

'--no-use-agent']

150

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

151

205

def __enter__(self):

152

206

return self

153

207

154

208

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

155

209

self._cleanup()

156

210

return False

157

211

158

212

def __del__(self):

159

213

self._cleanup()

160

214

161

215

def _cleanup(self):

162

216

if self.tempdir is not None:

163

217

# Delete contents of tempdir

164

218

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

165

topdown = False):

219

topdown=False):

166

220

for filename in files:

167

221

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

168

222

for dirname in dirs:

170

224

# Remove tempdir

171

225

os.rmdir(self.tempdir)

172

226

self.tempdir = None

173

227

174

228

def password_encode(self, password):

175

229

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

176

230

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

181

235

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

182

236

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

183

237

return encoded

184

238

185

239

def encrypt(self, data, password):

186

240

passphrase = self.password_encode(password)

187

with tempfile.NamedTemporaryFile(dir=self.tempdir

188

) as passfile:

241

with tempfile.NamedTemporaryFile(

242

dir=self.tempdir) as passfile:

189

243

passfile.write(passphrase)

190

244

passfile.flush()

191

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

245

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

192

246

'--passphrase-file',

193

247

passfile.name]

194

248

+ self.gnupgargs,

195

stdin = subprocess.PIPE,

196

stdout = subprocess.PIPE,

197

stderr = subprocess.PIPE)

198

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

249

stdin=subprocess.PIPE,

250

stdout=subprocess.PIPE,

251

stderr=subprocess.PIPE)

252

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

199

253

if proc.returncode != 0:

200

254

raise PGPError(err)

201

255

return ciphertext

202

256

203

257

def decrypt(self, data, password):

204

258

passphrase = self.password_encode(password)

205

with tempfile.NamedTemporaryFile(dir = self.tempdir

206

) as passfile:

259

with tempfile.NamedTemporaryFile(

260

dir=self.tempdir) as passfile:

207

261

passfile.write(passphrase)

208

262

passfile.flush()

209

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

263

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

210

264

'--passphrase-file',

211

265

passfile.name]

212

266

+ self.gnupgargs,

213

stdin = subprocess.PIPE,

214

stdout = subprocess.PIPE,

215

stderr = subprocess.PIPE)

216

decrypted_plaintext, err = proc.communicate(input

217

= data)

267

stdin=subprocess.PIPE,

268

stdout=subprocess.PIPE,

269

stderr=subprocess.PIPE)

270

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

218

271

if proc.returncode != 0:

219

272

raise PGPError(err)

220

273

return decrypted_plaintext

221

274

222

275

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

223

303

class AvahiError(Exception):

224

304

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

225

305

self.value = value

226

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

227

def __unicode__(self):

228

return unicode(repr(self.value))

306

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

307

**kwargs)

308

229

309

230

310

class AvahiServiceError(AvahiError):

231

311

pass

232

312

313

233

314

class AvahiGroupError(AvahiError):

234

315

pass

235

316

236

317

237

318

class AvahiService(object):

238

319

"""An Avahi (Zeroconf) service.

239

320

240

321

Attributes:

241

322

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

242

323

Used to optionally bind to the specified interface.

254

335

server: D-Bus Server

255

336

bus: dbus.SystemBus()

256

337

"""

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):

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):

262

350

self.interface = interface

263

351

self.name = name

264

352

self.type = servicetype

273

361

self.server = None

274

362

self.bus = bus

275

363

self.entry_group_state_changed_match = None

276

277

def rename(self):

364

365

def rename(self, remove=True):

278

366

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

279

367

if self.rename_count >= self.max_renames:

280

368

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

281

369

" after %i retries, exiting.",

282

370

self.rename_count)

283

371

raise AvahiServiceError("Too many renames")

284

self.name = unicode(self.server

285

.GetAlternativeServiceName(self.name))

372

self.name = str(

373

self.server.GetAlternativeServiceName(self.name))

374

self.rename_count += 1

286

375

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

287

376

self.name)

288

self.remove()

377

if remove:

378

self.remove()

289

379

try:

290

380

self.add()

291

381

except dbus.exceptions.DBusException as error:

292

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

293

self.cleanup()

294

os._exit(1)

295

self.rename_count += 1

296

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

297

391

def remove(self):

298

392

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

299

393

if self.entry_group_state_changed_match is not None:

301

395

self.entry_group_state_changed_match = None

302

396

if self.group is not None:

303

397

self.group.Reset()

304

398

305

399

def add(self):

306

400

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

307

401

self.remove()

324

418

dbus.UInt16(self.port),

325

419

avahi.string_array_to_txt_array(self.TXT))

326

420

self.group.Commit()

327

421

328

422

def entry_group_state_changed(self, state, error):

329

423

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

330

424

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

331

425

332

426

if state == avahi.ENTRY_GROUP_ESTABLISHED:

333

427

logger.debug("Zeroconf service established.")

334

428

elif state == avahi.ENTRY_GROUP_COLLISION:

336

430

self.rename()

337

431

elif state == avahi.ENTRY_GROUP_FAILURE:

338

432

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

339

unicode(error))

340

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

341

.format(error))

342

433

str(error))

434

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

435

343

436

def cleanup(self):

344

437

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

345

438

if self.group is not None:

350

443

pass

351

444

self.group = None

352

445

self.remove()

353

446

354

447

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

355

448

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

356

449

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

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" }

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

}

364

456

if state in bad_states:

365

457

if bad_states[state] is not None:

366

458

if error is None:

369

461

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

370

462

self.cleanup()

371

463

elif state == avahi.SERVER_RUNNING:

372

self.add()

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)

373

476

else:

374

477

if error is None:

375

478

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

376

479

else:

377

480

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

378

481

379

482

def activate(self):

380

483

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

381

484

if self.server is None:

385

488

follow_name_owner_changes=True),

386

489

avahi.DBUS_INTERFACE_SERVER)

387

490

self.server.connect_to_signal("StateChanged",

388

self.server_state_changed)

491

self.server_state_changed)

389

492

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

390

493

391

494

392

495

class AvahiServiceToSyslog(AvahiService):

393

def rename(self):

496

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

394

497

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

395

ret = AvahiService.rename(self)

396

syslogger.setFormatter(logging.Formatter

397

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

398

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

399

.format(self.name)))

498

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

499

syslogger.setFormatter(logging.Formatter(

500

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

501

.format(self.name)))

400

502

return ret

401

503

402

504

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))

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 class name "GnuTLS" here, since this method is

519

# called before the assignment to the "gnutls" global variable

520

# happens.

521

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

522

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

523

.format(self._need_version))

524

525

# Unless otherwise indicated, the constants and types below are

526

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

527

528

# Constants

529

E_SUCCESS = 0

530

E_INTERRUPTED = -52

531

E_AGAIN = -28

532

CRT_OPENPGP = 2

533

CLIENT = 2

534

SHUT_RDWR = 0

535

CRD_CERTIFICATE = 1

536

E_NO_CERTIFICATE_FOUND = -49

537

OPENPGP_FMT_RAW = 0 # gnutls/openpgp.h

538

539

# Types

540

class session_int(ctypes.Structure):

541

_fields_ = []

542

session_t = ctypes.POINTER(session_int)

543

544

class certificate_credentials_st(ctypes.Structure):

545

_fields_ = []

546

certificate_credentials_t = ctypes.POINTER(

547

certificate_credentials_st)

548

certificate_type_t = ctypes.c_int

549

550

class datum_t(ctypes.Structure):

551

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

552

('size', ctypes.c_uint)]

553

554

class openpgp_crt_int(ctypes.Structure):

555

_fields_ = []

556

openpgp_crt_t = ctypes.POINTER(openpgp_crt_int)

557

openpgp_crt_fmt_t = ctypes.c_int # gnutls/openpgp.h

558

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

559

credentials_type_t = ctypes.c_int

560

transport_ptr_t = ctypes.c_void_p

561

close_request_t = ctypes.c_int

562

563

# Exceptions

564

class Error(Exception):

565

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

566

# exception might be raised from within GnuTLS.__init__,

567

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

568

# global variable has happened.

569

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

570

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

571

# code is passed, convert it to a string with

572

# gnutls.strerror()

573

self.code = code

574

if message is None and code is not None:

575

message = GnuTLS.strerror(code)

576

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

577

message, *args)

578

579

class CertificateSecurityError(Error):

580

pass

581

582

# Classes

583

class Credentials(object):

584

def __init__(self):

585

self._c_object = gnutls.certificate_credentials_t()

586

gnutls.certificate_allocate_credentials(

587

ctypes.byref(self._c_object))

588

self.type = gnutls.CRD_CERTIFICATE

589

590

def __del__(self):

591

gnutls.certificate_free_credentials(self._c_object)

592

593

class ClientSession(object):

594

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

595

self._c_object = gnutls.session_t()

596

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

597

gnutls.set_default_priority(self._c_object)

598

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

599

gnutls.handshake_set_private_extensions(self._c_object,

600

True)

601

self.socket = socket

602

if credentials is None:

603

credentials = gnutls.Credentials()

604

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

605

ctypes.cast(credentials._c_object,

606

ctypes.c_void_p))

607

self.credentials = credentials

608

609

def __del__(self):

610

gnutls.deinit(self._c_object)

611

612

def handshake(self):

613

return gnutls.handshake(self._c_object)

614

615

def send(self, data):

616

data = bytes(data)

617

data_len = len(data)

618

while data_len > 0:

619

data_len -= gnutls.record_send(self._c_object,

620

data[-data_len:],

621

data_len)

622

623

def bye(self):

624

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

625

626

# Error handling functions

627

def _error_code(result):

628

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

629

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

630

if result >= 0:

631

return result

632

if result == gnutls.E_NO_CERTIFICATE_FOUND:

633

raise gnutls.CertificateSecurityError(code=result)

634

raise gnutls.Error(code=result)

635

636

def _retry_on_error(result, func, arguments):

637

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

638

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

639

while result < 0:

640

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

641

return _error_code(result)

642

result = func(*arguments)

643

return result

644

645

# Unless otherwise indicated, the function declarations below are

646

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

647

648

# Functions

649

priority_set_direct = _library.gnutls_priority_set_direct

650

priority_set_direct.argtypes = [session_t, ctypes.c_char_p,

651

ctypes.POINTER(ctypes.c_char_p)]

652

priority_set_direct.restype = _error_code

653

654

init = _library.gnutls_init

655

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

656

init.restype = _error_code

657

658

set_default_priority = _library.gnutls_set_default_priority

659

set_default_priority.argtypes = [session_t]

660

set_default_priority.restype = _error_code

661

662

record_send = _library.gnutls_record_send

663

record_send.argtypes = [session_t, ctypes.c_void_p,

664

ctypes.c_size_t]

665

record_send.restype = ctypes.c_ssize_t

666

record_send.errcheck = _retry_on_error

667

668

certificate_allocate_credentials = (

669

_library.gnutls_certificate_allocate_credentials)

670

certificate_allocate_credentials.argtypes = [

671

ctypes.POINTER(certificate_credentials_t)]

672

certificate_allocate_credentials.restype = _error_code

673

674

certificate_free_credentials = (

675

_library.gnutls_certificate_free_credentials)

676

certificate_free_credentials.argtypes = [

677

certificate_credentials_t]

678

certificate_free_credentials.restype = None

679

680

handshake_set_private_extensions = (

681

_library.gnutls_handshake_set_private_extensions)

682

handshake_set_private_extensions.argtypes = [session_t,

683

ctypes.c_int]

684

handshake_set_private_extensions.restype = None

685

686

credentials_set = _library.gnutls_credentials_set

687

credentials_set.argtypes = [session_t, credentials_type_t,

688

ctypes.c_void_p]

689

credentials_set.restype = _error_code

690

691

strerror = _library.gnutls_strerror

692

strerror.argtypes = [ctypes.c_int]

693

strerror.restype = ctypes.c_char_p

694

695

certificate_type_get = _library.gnutls_certificate_type_get

696

certificate_type_get.argtypes = [session_t]

697

certificate_type_get.restype = _error_code

698

699

certificate_get_peers = _library.gnutls_certificate_get_peers

700

certificate_get_peers.argtypes = [session_t,

701

ctypes.POINTER(ctypes.c_uint)]

702

certificate_get_peers.restype = ctypes.POINTER(datum_t)

703

704

global_set_log_level = _library.gnutls_global_set_log_level

705

global_set_log_level.argtypes = [ctypes.c_int]

706

global_set_log_level.restype = None

707

708

global_set_log_function = _library.gnutls_global_set_log_function

709

global_set_log_function.argtypes = [log_func]

710

global_set_log_function.restype = None

711

712

deinit = _library.gnutls_deinit

713

deinit.argtypes = [session_t]

714

deinit.restype = None

715

716

handshake = _library.gnutls_handshake

717

handshake.argtypes = [session_t]

718

handshake.restype = _error_code

719

handshake.errcheck = _retry_on_error

720

721

transport_set_ptr = _library.gnutls_transport_set_ptr

722

transport_set_ptr.argtypes = [session_t, transport_ptr_t]

723

transport_set_ptr.restype = None

724

725

bye = _library.gnutls_bye

726

bye.argtypes = [session_t, close_request_t]

727

bye.restype = _error_code

728

bye.errcheck = _retry_on_error

729

730

check_version = _library.gnutls_check_version

731

check_version.argtypes = [ctypes.c_char_p]

732

check_version.restype = ctypes.c_char_p

733

734

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

735

736

openpgp_crt_init = _library.gnutls_openpgp_crt_init

737

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

738

openpgp_crt_init.restype = _error_code

739

740

openpgp_crt_import = _library.gnutls_openpgp_crt_import

741

openpgp_crt_import.argtypes = [openpgp_crt_t,

742

ctypes.POINTER(datum_t),

743

openpgp_crt_fmt_t]

744

openpgp_crt_import.restype = _error_code

745

746

openpgp_crt_verify_self = _library.gnutls_openpgp_crt_verify_self

747

openpgp_crt_verify_self.argtypes = [openpgp_crt_t, ctypes.c_uint,

748

ctypes.POINTER(ctypes.c_uint)]

749

openpgp_crt_verify_self.restype = _error_code

750

751

openpgp_crt_deinit = _library.gnutls_openpgp_crt_deinit

752

openpgp_crt_deinit.argtypes = [openpgp_crt_t]

753

openpgp_crt_deinit.restype = None

754

755

openpgp_crt_get_fingerprint = (

756

_library.gnutls_openpgp_crt_get_fingerprint)

757

openpgp_crt_get_fingerprint.argtypes = [openpgp_crt_t,

758

ctypes.c_void_p,

759

ctypes.POINTER(

760

ctypes.c_size_t)]

761

openpgp_crt_get_fingerprint.restype = _error_code

762

763

# Remove non-public functions

764

del _error_code, _retry_on_error

765

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

766

gnutls = GnuTLS()

767

768

769

def call_pipe(connection, # : multiprocessing.Connection

770

func, *args, **kwargs):

771

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

772

773

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

774

return value on the provided multiprocessing.Connection.

775

"""

776

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

777

connection.close()

408

778

409

779

410

780

class Client(object):

411

781

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

412

782

413

783

Attributes:

414

784

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

415

785

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

417

787

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

418

788

to see if the client lives.

419

789

'None' if no process is running.

420

checker_callback_tag: a gobject event source tag, or None

790

checker_callback_tag: a GLib event source tag, or None

421

791

checker_command: string; External command which is run to check

422

792

if client lives. %() expansions are done at

423

793

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

424

794

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

425

checker_initiator_tag: a gobject event source tag, or None

795

checker_initiator_tag: a GLib event source tag, or None

426

796

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

427

797

client_structure: Object describing what attributes a client has

428

798

and is used for storing the client at exit

429

799

current_checker_command: string; current running checker_command

430

disable_initiator_tag: a gobject event source tag, or None

800

disable_initiator_tag: a GLib event source tag, or None

431

801

enabled: bool()

432

802

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

433

803

uniquely identify the client

438

808

last_checker_status: integer between 0 and 255 reflecting exit

439

809

status of last checker. -1 reflects crashed

440

810

checker, -2 means no checker completed yet.

811

last_checker_signal: The signal which killed the last checker, if

812

last_checker_status is -1

441

813

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

442

814

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

443

815

D-Bus identifiers

450

822

disabled, or None

451

823

server_settings: The server_settings dict from main()

452

824

"""

453

825

454

826

runtime_expansions = ("approval_delay", "approval_duration",

455

827

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

456

828

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

457

829

"last_approval_request", "last_checked_ok",

458

830

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

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

831

client_defaults = {

832

"timeout": "PT5M",

833

"extended_timeout": "PT15M",

834

"interval": "PT2M",

835

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

836

"host": "",

837

"approval_delay": "PT0S",

838

"approval_duration": "PT1S",

839

"approved_by_default": "True",

840

"enabled": "True",

841

}

842

485

843

@staticmethod

486

844

def config_parser(config):

487

845

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

494

852

for client_name in config.sections():

495

853

section = dict(config.items(client_name))

496

854

client = settings[client_name] = {}

497

855

498

856

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

499

857

# Reformat values from string types to Python types

500

858

client["approved_by_default"] = config.getboolean(

501

859

client_name, "approved_by_default")

502

860

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

503

861

"enabled")

504

862

863

# Uppercase and remove spaces from fingerprint for later

864

# comparison purposes with return value from the

865

# fingerprint() function

505

866

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

506

867

.replace(" ", ""))

507

868

if "secret" in section:

508

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

869

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

870

.encode("utf-8"),

871

"base64")

509

872

elif "secfile" in section:

510

873

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

511

874

(section["secfile"])),

512

875

"rb") as secfile:

513

876

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

514

877

else:

515

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

878

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

516

879

.format(section))

517

880

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

518

881

client["extended_timeout"] = string_to_delta(

526

889

client["last_approval_request"] = None

527

890

client["last_checked_ok"] = None

528

891

client["last_checker_status"] = -2

529

892

530

893

return settings

531

532

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

894

895

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

533

896

self.name = name

534

897

if server_settings is None:

535

898

server_settings = {}

536

899

self.server_settings = server_settings

537

900

# adding all client settings

538

for setting, value in settings.iteritems():

901

for setting, value in settings.items():

539

902

setattr(self, setting, value)

540

903

541

904

if self.enabled:

542

905

if not hasattr(self, "last_enabled"):

543

906

self.last_enabled = datetime.datetime.utcnow()

547

910

else:

548

911

self.last_enabled = None

549

912

self.expires = None

550

913

551

914

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

555

915

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

556

916

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

557

917

datetime.datetime.utcnow())

558

918

559

919

# attributes specific for this server instance

560

920

self.checker = None

561

921

self.checker_initiator_tag = None

564

924

self.current_checker_command = None

565

925

self.approved = None

566

926

self.approvals_pending = 0

567

self.changedstate = (multiprocessing_manager

568

.Condition(multiprocessing_manager

569

.Lock()))

570

self.client_structure = [attr for attr in

571

self.__dict__.iterkeys()

927

self.changedstate = multiprocessing_manager.Condition(

928

multiprocessing_manager.Lock())

929

self.client_structure = [attr

930

for attr in self.__dict__.keys()

572

931

if not attr.startswith("_")]

573

932

self.client_structure.append("client_structure")

574

575

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

576

lambda obj:

577

isinstance(obj,

578

property)):

933

934

for name, t in inspect.getmembers(

935

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

579

936

if not name.startswith("_"):

580

937

self.client_structure.append(name)

581

938

582

939

# Send notice to process children that client state has changed

583

940

def send_changedstate(self):

584

941

with self.changedstate:

585

942

self.changedstate.notify_all()

586

943

587

944

def enable(self):

588

945

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

589

946

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

594

951

self.last_enabled = datetime.datetime.utcnow()

595

952

self.init_checker()

596

953

self.send_changedstate()

597

954

598

955

def disable(self, quiet=True):

599

956

"""Disable this client."""

600

957

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

602

959

if not quiet:

603

960

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

604

961

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

605

gobject.source_remove(self.disable_initiator_tag)

962

GLib.source_remove(self.disable_initiator_tag)

606

963

self.disable_initiator_tag = None

607

964

self.expires = None

608

965

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

609

gobject.source_remove(self.checker_initiator_tag)

966

GLib.source_remove(self.checker_initiator_tag)

610

967

self.checker_initiator_tag = None

611

968

self.stop_checker()

612

969

self.enabled = False

613

970

if not quiet:

614

971

self.send_changedstate()

615

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

972

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

616

973

return False

617

974

618

975

def __del__(self):

619

976

self.disable()

620

977

621

978

def init_checker(self):

622

979

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

623

980

# and every interval from then on.

624

981

if self.checker_initiator_tag is not None:

625

gobject.source_remove(self.checker_initiator_tag)

626

self.checker_initiator_tag = (gobject.timeout_add

627

(self.interval_milliseconds(),

628

self.start_checker))

982

GLib.source_remove(self.checker_initiator_tag)

983

self.checker_initiator_tag = GLib.timeout_add(

984

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

985

self.start_checker)

629

986

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

630

987

if self.disable_initiator_tag is not None:

631

gobject.source_remove(self.disable_initiator_tag)

632

self.disable_initiator_tag = (gobject.timeout_add

633

(self.timeout_milliseconds(),

634

self.disable))

988

GLib.source_remove(self.disable_initiator_tag)

989

self.disable_initiator_tag = GLib.timeout_add(

990

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

635

991

# Also start a new checker *right now*.

636

992

self.start_checker()

637

638

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

993

994

def checker_callback(self, source, condition, connection,

995

command):

639

996

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

640

997

self.checker_callback_tag = None

641

998

self.checker = None

642

if os.WIFEXITED(condition):

643

self.last_checker_status = os.WEXITSTATUS(condition)

999

# Read return code from connection (see call_pipe)

1000

returncode = connection.recv()

1001

connection.close()

1002

1003

if returncode >= 0:

1004

self.last_checker_status = returncode

1005

self.last_checker_signal = None

644

1006

if self.last_checker_status == 0:

645

1007

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

646

1008

vars(self))

647

1009

self.checked_ok()

648

1010

else:

649

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

650

vars(self))

1011

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

651

1012

else:

652

1013

self.last_checker_status = -1

1014

self.last_checker_signal = -returncode

653

1015

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

654

1016

vars(self))

655

1017

return False

1018

656

1019

def checked_ok(self):

657

1020

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

658

1021

self.last_checked_ok = datetime.datetime.utcnow()

659

1022

self.last_checker_status = 0

1023

self.last_checker_signal = None

660

1024

self.bump_timeout()

661

1025

662

1026

def bump_timeout(self, timeout=None):

663

1027

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

664

1028

if timeout is None:

665

1029

timeout = self.timeout

666

1030

if self.disable_initiator_tag is not None:

667

gobject.source_remove(self.disable_initiator_tag)

1031

GLib.source_remove(self.disable_initiator_tag)

668

1032

self.disable_initiator_tag = None

669

1033

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

670

self.disable_initiator_tag = (gobject.timeout_add

671

(timedelta_to_milliseconds

672

(timeout), self.disable))

1034

self.disable_initiator_tag = GLib.timeout_add(

1035

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

673

1036

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

674

1037

675

1038

def need_approval(self):

676

1039

self.last_approval_request = datetime.datetime.utcnow()

677

1040

678

1041

def start_checker(self):

679

1042

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

680

1043

681

1044

If a checker already exists, leave it running and do

682

1045

nothing."""

683

1046

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

688

1051

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

689

1052

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

690

1053

# should be.

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)

1054

1055

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

1056

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

1057

self.checker.join()

1058

self.checker = None

706

1059

# Start a new checker if needed

707

1060

if self.checker is None:

708

1061

# Escape attributes for the shell

709

escaped_attrs = dict(

710

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

711

for attr in

712

self.runtime_expansions)

1062

escaped_attrs = {

1063

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

1064

for attr in self.runtime_expansions}

713

1065

try:

714

1066

command = self.checker_command % escaped_attrs

715

1067

except TypeError as error:

716

1068

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

717

self.checker_command, exc_info=error)

718

return True # Try again later

1069

self.checker_command,

1070

exc_info=error)

1071

return True # Try again later

719

1072

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",

741

exc_info=error)

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

1073

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

1074

self.name)

1075

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

1076

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

1077

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

1078

# always replaced by /dev/null.)

1079

# The exception is when not debugging but nevertheless

1080

# running in the foreground; use the previously

1081

# created wnull.

1082

popen_args = {"close_fds": True,

1083

"shell": True,

1084

"cwd": "/"}

1085

if (not self.server_settings["debug"]

1086

and self.server_settings["foreground"]):

1087

popen_args.update({"stdout": wnull,

1088

"stderr": wnull})

1089

pipe = multiprocessing.Pipe(duplex=False)

1090

self.checker = multiprocessing.Process(

1091

target=call_pipe,

1092

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

1093

kwargs=popen_args)

1094

self.checker.start()

1095

self.checker_callback_tag = GLib.io_add_watch(

1096

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

1097

self.checker_callback, pipe[0], command)

1098

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

762

1099

return True

763

1100

764

1101

def stop_checker(self):

765

1102

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

766

1103

if self.checker_callback_tag:

767

gobject.source_remove(self.checker_callback_tag)

1104

GLib.source_remove(self.checker_callback_tag)

768

1105

self.checker_callback_tag = None

769

1106

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

770

1107

return

771

1108

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

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

self.checker.terminate()

780

1110

self.checker = None

781

1111

782

1112

783

def dbus_service_property(dbus_interface, signature="v",

784

access="readwrite", byte_arrays=False):

1113

def dbus_service_property(dbus_interface,

1114

signature="v",

1115

access="readwrite",

1116

byte_arrays=False):

785

1117

"""Decorators for marking methods of a DBusObjectWithProperties to

786

1118

become properties on the D-Bus.

787

1119

788

1120

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

789

1121

and with one argument by "Set".

790

1122

791

1123

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

792

1124

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

793

1125

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

796

1128

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

797

1129

if byte_arrays and signature != "ay":

798

1130

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

799

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

1131

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

1132

800

1133

def decorator(func):

801

1134

func._dbus_is_property = True

802

1135

func._dbus_interface = dbus_interface

805

1138

func._dbus_name = func.__name__

806

1139

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

807

1140

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

808

func._dbus_get_args_options = {'byte_arrays': byte_arrays }

1141

func._dbus_get_args_options = {'byte_arrays': byte_arrays}

809

1142

return func

1143

810

1144

return decorator

811

1145

812

1146

813

1147

def dbus_interface_annotations(dbus_interface):

814

1148

"""Decorator for marking functions returning interface annotations

815

1149

816

1150

Usage:

817

1151

818

1152

@dbus_interface_annotations("org.example.Interface")

819

1153

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

820

1154

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

821

1155

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

822

1156

"false"}

823

1157

"""

1158

824

1159

def decorator(func):

825

1160

func._dbus_is_interface = True

826

1161

func._dbus_interface = dbus_interface

827

1162

func._dbus_name = dbus_interface

828

1163

return func

1164

829

1165

return decorator

830

1166

831

1167

832

1168

def dbus_annotations(annotations):

833

1169

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

834

1170

Usage:

835

1171

1172

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

1173

"org.freedesktop.DBus.Property."

1174

"EmitsChangedSignal": "false"})

836

1175

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

837

1176

access="r")

838

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

839

"org.freedesktop.DBus.Property."

840

"EmitsChangedSignal": "false"})

841

1177

def Property_dbus_property(self):

842

1178

return dbus.Boolean(False)

1179

1180

See also the DBusObjectWithAnnotations class.

843

1181

"""

1182

844

1183

def decorator(func):

845

1184

func._dbus_annotations = annotations

846

1185

return func

1186

847

1187

return decorator

848

1188

849

1189

850

1190

class DBusPropertyException(dbus.exceptions.DBusException):

851

1191

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

852

1192

"""

853

def __unicode__(self):

854

return unicode(str(self))

1193

pass

855

1194

856

1195

857

1196

class DBusPropertyAccessException(DBusPropertyException):

866

1205

pass

867

1206

868

1207

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.

1208

class DBusObjectWithAnnotations(dbus.service.Object):

1209

"""A D-Bus object with annotations.

1210

1211

Classes inheriting from this can use the dbus_annotations

1212

decorator to add annotations to methods or signals.

875

1213

"""

876

1214

877

1215

@staticmethod

878

1216

def _is_dbus_thing(thing):

879

1217

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

880

1218

881

1219

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

882

1220

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

883

1221

"""

884

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

1222

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

885

1223

False)

886

1224

887

1225

def _get_all_dbus_things(self, thing):

888

1226

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

889

1227

"""

890

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

891

name),

1228

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

892

1229

athing.__get__(self))

893

1230

for cls in self.__class__.__mro__

894

1231

for name, athing in

895

inspect.getmembers(cls,

896

self._is_dbus_thing(thing)))

897

1232

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

1233

1234

@dbus.service.method(dbus.INTROSPECTABLE_IFACE,

1235

out_signature="s",

1236

path_keyword='object_path',

1237

connection_keyword='connection')

1238

def Introspect(self, object_path, connection):

1239

"""Overloading of standard D-Bus method.

1240

1241

Inserts annotation tags on methods and signals.

1242

"""

1243

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

1244

connection)

1245

try:

1246

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

1247

1248

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

1249

# Add annotation tags

1250

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

1251

for tag in if_tag.getElementsByTagName(typ):

1252

annots = dict()

1253

for name, prop in (self.

1254

_get_all_dbus_things(typ)):

1255

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

1256

and prop._dbus_interface

1257

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

1258

annots.update(getattr(

1259

prop, "_dbus_annotations", {}))

1260

for name, value in annots.items():

1261

ann_tag = document.createElement(

1262

"annotation")

1263

ann_tag.setAttribute("name", name)

1264

ann_tag.setAttribute("value", value)

1265

tag.appendChild(ann_tag)

1266

# Add interface annotation tags

1267

for annotation, value in dict(

1268

itertools.chain.from_iterable(

1269

annotations().items()

1270

for name, annotations

1271

in self._get_all_dbus_things("interface")

1272

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

1273

)).items():

1274

ann_tag = document.createElement("annotation")

1275

ann_tag.setAttribute("name", annotation)

1276

ann_tag.setAttribute("value", value)

1277

if_tag.appendChild(ann_tag)

1278

# Fix argument name for the Introspect method itself

1279

if (if_tag.getAttribute("name")

1280

== dbus.INTROSPECTABLE_IFACE):

1281

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

1282

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

1283

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

1284

if (arg.getAttribute("direction")

1285

== "out"):

1286

arg.setAttribute("name",

1287

"xml_data")

1288

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

1289

document.unlink()

1290

except (AttributeError, xml.dom.DOMException,

1291

xml.parsers.expat.ExpatError) as error:

1292

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

1293

exc_info=error)

1294

return xmlstring

1295

1296

1297

class DBusObjectWithProperties(DBusObjectWithAnnotations):

1298

"""A D-Bus object with properties.

1299

1300

Classes inheriting from this can use the dbus_service_property

1301

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

1302

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

1303

"""

1304

898

1305

def _get_dbus_property(self, interface_name, property_name):

899

1306

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

900

1307

property with the specified name and interface.

901

1308

"""

902

for cls in self.__class__.__mro__:

903

for name, value in (inspect.getmembers

904

(cls,

905

self._is_dbus_thing("property"))):

1309

for cls in self.__class__.__mro__:

1310

for name, value in inspect.getmembers(

1311

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

906

1312

if (value._dbus_name == property_name

907

1313

and value._dbus_interface == interface_name):

908

1314

return value.__get__(self)

909

1315

910

1316

# No such property

911

raise DBusPropertyNotFound(self.dbus_object_path + ":"

912

+ interface_name + "."

913

+ property_name)

914

915

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

1317

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

1318

self.dbus_object_path, interface_name, property_name))

1319

1320

@classmethod

1321

def _get_all_interface_names(cls):

1322

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

1323

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

1324

"_dbus_interface", None)

1325

for x in (inspect.getmro(cls))

1326

for attr in dir(x))

1327

if name is not None)

1328

1329

@dbus.service.method(dbus.PROPERTIES_IFACE,

1330

in_signature="ss",

916

1331

out_signature="v")

917

1332

def Get(self, interface_name, property_name):

918

1333

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

924

1339

if not hasattr(value, "variant_level"):

925

1340

return value

926

1341

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

927

1342

928

1343

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

929

1344

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

930

1345

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

937

1352

# signatures other than "ay".

938

1353

if prop._dbus_signature != "ay":

939

1354

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

940

"'ay' signature {0!r}"

1355

"'ay' signature {!r}"

941

1356

.format(prop._dbus_signature))

942

1357

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

943

1358

for byte in value))

944

1359

prop(value)

945

946

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

1360

1361

@dbus.service.method(dbus.PROPERTIES_IFACE,

1362

in_signature="s",

947

1363

out_signature="a{sv}")

948

1364

def GetAll(self, interface_name):

949

1365

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

950

1366

standard.

951

1367

952

1368

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

953

1369

"""

954

1370

properties = {}

964

1380

if not hasattr(value, "variant_level"):

965

1381

properties[name] = value

966

1382

continue

967

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

968

value.variant_level+1)

1383

properties[name] = type(value)(

1384

value, variant_level=value.variant_level + 1)

969

1385

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

970

1386

1387

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

1388

def PropertiesChanged(self, interface_name, changed_properties,

1389

invalidated_properties):

1390

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

1391

standard.

1392

"""

1393

pass

1394

971

1395

@dbus.service.method(dbus.INTROSPECTABLE_IFACE,

972

1396

out_signature="s",

973

1397

path_keyword='object_path',

974

1398

connection_keyword='connection')

975

1399

def Introspect(self, object_path, connection):

976

1400

"""Overloading of standard D-Bus method.

977

1401

978

1402

Inserts property tags and interface annotation tags.

979

1403

"""

980

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

981

connection)

1404

xmlstring = DBusObjectWithAnnotations.Introspect(self,

1405

object_path,

1406

connection)

982

1407

try:

983

1408

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

1409

984

1410

def make_tag(document, name, prop):

985

1411

e = document.createElement("property")

986

1412

e.setAttribute("name", name)

987

1413

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

988

1414

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

989

1415

return e

1416

990

1417

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

991

1418

# Add property tags

992

1419

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

995

1422

if prop._dbus_interface

996

1423

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

997

1424

if_tag.appendChild(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)

1425

# Add annotation tags for properties

1426

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

1427

annots = dict()

1428

for name, prop in self._get_all_dbus_things(

1429

"property"):

1430

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

1431

and prop._dbus_interface

1432

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

1433

annots.update(getattr(

1434

prop, "_dbus_annotations", {}))

1435

for name, value in annots.items():

1436

ann_tag = document.createElement(

1437

"annotation")

1438

ann_tag.setAttribute("name", name)

1439

ann_tag.setAttribute("value", value)

1440

tag.appendChild(ann_tag)

1029

1441

# Add the names to the return values for the

1030

1442

# "org.freedesktop.DBus.Properties" methods

1031

1443

if (if_tag.getAttribute("name")

1049

1461

exc_info=error)

1050

1462

return xmlstring

1051

1463

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

1052

1534

1053

1535

def datetime_to_dbus(dt, variant_level=0):

1054

1536

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

1055

1537

if dt is None:

1056

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

1057

return dbus.String(dt.isoformat(),

1058

variant_level=variant_level)

1538

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

1539

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

1059

1540

1060

1541

1061

1542

def alternate_dbus_interfaces(alt_interface_names, deprecate=True):

1063

1544

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

1064

1545

interface names according to the "alt_interface_names" mapping.

1065

1546

Usage:

1066

1547

1067

1548

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

1068

1549

"net.example.AlternateInterface"})

1069

1550

class SampleDBusObject(dbus.service.Object):

1070

1551

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

1071

1552

def SampleDBusMethod():

1072

1553

pass

1073

1554

1074

1555

The above "SampleDBusMethod" on "SampleDBusObject" will be

1075

1556

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

1076

1557

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

1077

1558

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

1078

1559

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

1079

1560

1080

1561

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

1081

1562

(from DBusObjectWithProperties) and interfaces (from the

1082

1563

dbus_interface_annotations decorator).

1083

1564

"""

1565

1084

1566

def wrapper(cls):

1085

1567

for orig_interface_name, alt_interface_name in (

1086

alt_interface_names.iteritems()):

1568

alt_interface_names.items()):

1087

1569

attr = {}

1088

1570

interface_names = set()

1089

1571

# Go though all attributes of the class

1091

1573

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

1092

1574

# with the wrong interface name

1093

1575

if (not hasattr(attribute, "_dbus_interface")

1094

or not attribute._dbus_interface

1095

.startswith(orig_interface_name)):

1576

or not attribute._dbus_interface.startswith(

1577

orig_interface_name)):

1096

1578

continue

1097

1579

# Create an alternate D-Bus interface name based on

1098

1580

# the current name

1099

alt_interface = (attribute._dbus_interface

1100

.replace(orig_interface_name,

1101

alt_interface_name))

1581

alt_interface = attribute._dbus_interface.replace(

1582

orig_interface_name, alt_interface_name)

1102

1583

interface_names.add(alt_interface)

1103

1584

# Is this a D-Bus signal?

1104

1585

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

1105

1586

# Extract the original non-method undecorated

1106

1587

# function by black magic

1107

nonmethod_func = (dict(

1588

if sys.version_info.major == 2:

1589

nonmethod_func = (dict(

1108

1590

zip(attribute.func_code.co_freevars,

1109

attribute.__closure__))["func"]

1110

.cell_contents)

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)

1111

1598

# Create a new, but exactly alike, function

1112

1599

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

1113

1600

# with the alternate D-Bus interface name

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)))

1601

new_function = copy_function(nonmethod_func)

1602

new_function = (dbus.service.signal(

1603

alt_interface,

1604

attribute._dbus_signature)(new_function))

1123

1605

# Copy annotations, if any

1124

1606

try:

1125

new_function._dbus_annotations = (

1126

dict(attribute._dbus_annotations))

1607

new_function._dbus_annotations = dict(

1608

attribute._dbus_annotations)

1127

1609

except AttributeError:

1128

1610

pass

1611

1129

1612

# Define a creator of a function to call both the

1130

1613

# original and alternate functions, so both the

1131

1614

# original and alternate signals gets sent when

1134

1617

"""This function is a scope container to pass

1135

1618

func1 and func2 to the "call_both" function

1136

1619

outside of its arguments"""

1620

1621

@functools.wraps(func2)

1137

1622

def call_both(*args, **kwargs):

1138

1623

"""This function will emit two D-Bus

1139

1624

signals by calling func1 and func2"""

1140

1625

func1(*args, **kwargs)

1141

1626

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

1142

1633

return call_both

1143

1634

# Create the "call_both" function and add it to

1144

1635

# the class

1149

1640

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

1150

1641

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

1151

1642

# to the class.

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)))

1643

attr[attrname] = (

1644

dbus.service.method(

1645

alt_interface,

1646

attribute._dbus_in_signature,

1647

attribute._dbus_out_signature)

1648

(copy_function(attribute)))

1162

1649

# Copy annotations, if any

1163

1650

try:

1164

attr[attrname]._dbus_annotations = (

1165

dict(attribute._dbus_annotations))

1651

attr[attrname]._dbus_annotations = dict(

1652

attribute._dbus_annotations)

1166

1653

except AttributeError:

1167

1654

pass

1168

1655

# Is this a D-Bus property?

1171

1658

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

1172

1659

# property with the alternate D-Bus interface

1173

1660

# name. Add it to the class.

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)))

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)))

1187

1667

# Copy annotations, if any

1188

1668

try:

1189

attr[attrname]._dbus_annotations = (

1190

dict(attribute._dbus_annotations))

1669

attr[attrname]._dbus_annotations = dict(

1670

attribute._dbus_annotations)

1191

1671

except AttributeError:

1192

1672

pass

1193

1673

# Is this a D-Bus interface?

1196

1676

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

1197

1677

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

1198

1678

# to the class.

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)))

1679

attr[attrname] = (

1680

dbus_interface_annotations(alt_interface)

1681

(copy_function(attribute)))

1207

1682

if deprecate:

1208

1683

# Deprecate all alternate interfaces

1209

iname="_AlternateDBusNames_interface_annotation{0}"

1684

iname = "_AlternateDBusNames_interface_annotation{}"

1210

1685

for interface_name in interface_names:

1686

1211

1687

@dbus_interface_annotations(interface_name)

1212

1688

def func(self):

1213

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

1214

"true" }

1689

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

1690

"true"}

1215

1691

# Find an unused name

1216

1692

for aname in (iname.format(i)

1217

1693

for i in itertools.count()):

1221

1697

if interface_names:

1222

1698

# Replace the class with a new subclass of it with

1223

1699

# methods, signals, etc. as created above.

1224

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

1225

(cls,), attr)

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)

1226

1706

return cls

1707

1227

1708

return wrapper

1228

1709

1229

1710

1230

1711

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

1231

"se.bsnet.fukt.Mandos"})

1712

"se.bsnet.fukt.Mandos"})

1232

1713

class ClientDBus(Client, DBusObjectWithProperties):

1233

1714

"""A Client class using D-Bus

1234

1715

1235

1716

Attributes:

1236

1717

dbus_object_path: dbus.ObjectPath

1237

1718

bus: dbus.SystemBus()

1238

1719

"""

1239

1720

1240

1721

runtime_expansions = (Client.runtime_expansions

1241

+ ("dbus_object_path",))

1242

1722

+ ("dbus_object_path", ))

1723

1724

_interface = "se.recompile.Mandos.Client"

1725

1243

1726

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

1244

1245

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

1727

1728

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

1246

1729

self.bus = bus

1247

1730

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

1248

1731

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

1249

1732

# the D-Bus

1250

client_object_name = unicode(self.name).translate(

1733

client_object_name = str(self.name).translate(

1251

1734

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

1252

1735

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

1253

self.dbus_object_path = (dbus.ObjectPath

1254

("/clients/" + client_object_name))

1736

self.dbus_object_path = dbus.ObjectPath(

1737

"/clients/" + client_object_name)

1255

1738

DBusObjectWithProperties.__init__(self, self.bus,

1256

1739

self.dbus_object_path)

1257

1258

def notifychangeproperty(transform_func,

1259

dbus_name, type_func=lambda x: x,

1260

variant_level=1):

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):

1261

1746

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

1262

1747

its changes to DBus.

1263

1748

1264

1749

transform_fun: Function that takes a value and a variant_level

1265

1750

and transforms it to a D-Bus type.

1266

1751

dbus_name: D-Bus name of the variable

1268

1753

to the D-Bus. Default: no transform

1269

1754

variant_level: D-Bus variant level. Default: 1

1270

1755

"""

1271

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

1756

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

1757

1272

1758

def setter(self, value):

1273

1759

if hasattr(self, "dbus_object_path"):

1274

1760

if (not hasattr(self, attrname) or

1275

1761

type_func(getattr(self, attrname, None))

1276

1762

!= type_func(value)):

1277

dbus_value = transform_func(type_func(value),

1278

variant_level

1279

=variant_level)

1280

self.PropertyChanged(dbus.String(dbus_name),

1281

dbus_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())

1282

1778

setattr(self, attrname, value)

1283

1779

1284

1780

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

1285

1781

1286

1782

expires = notifychangeproperty(datetime_to_dbus, "Expires")

1287

1783

approvals_pending = notifychangeproperty(dbus.Boolean,

1288

1784

"ApprovalPending",

1289

type_func = bool)

1785

type_func=bool)

1290

1786

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

1291

1787

last_enabled = notifychangeproperty(datetime_to_dbus,

1292

1788

"LastEnabled")

1293

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

1294

type_func = lambda checker:

1295

checker is not None)

1789

checker = notifychangeproperty(

1790

dbus.Boolean, "CheckerRunning",

1791

type_func=lambda checker: checker is not None)

1296

1792

last_checked_ok = notifychangeproperty(datetime_to_dbus,

1297

1793

"LastCheckedOK")

1298

1794

last_checker_status = notifychangeproperty(dbus.Int16,

1301

1797

datetime_to_dbus, "LastApprovalRequest")

1302

1798

approved_by_default = notifychangeproperty(dbus.Boolean,

1303

1799

"ApprovedByDefault")

1304

approval_delay = notifychangeproperty(dbus.UInt64,

1305

"ApprovalDelay",

1306

type_func =

1307

timedelta_to_milliseconds)

1800

approval_delay = notifychangeproperty(

1801

dbus.UInt64, "ApprovalDelay",

1802

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

1308

1803

approval_duration = notifychangeproperty(

1309

1804

dbus.UInt64, "ApprovalDuration",

1310

type_func = timedelta_to_milliseconds)

1805

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

1311

1806

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

1312

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

1313

type_func =

1314

timedelta_to_milliseconds)

1807

timeout = notifychangeproperty(

1808

dbus.UInt64, "Timeout",

1809

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

1315

1810

extended_timeout = notifychangeproperty(

1316

1811

dbus.UInt64, "ExtendedTimeout",

1317

type_func = timedelta_to_milliseconds)

1318

interval = notifychangeproperty(dbus.UInt64,

1319

"Interval",

1320

type_func =

1321

timedelta_to_milliseconds)

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)

1322

1816

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

1323

1817

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

1818

invalidate_only=True)

1819

1324

1820

del notifychangeproperty

1325

1821

1326

1822

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

1327

1823

try:

1328

1824

self.remove_from_connection()

1331

1827

if hasattr(DBusObjectWithProperties, "__del__"):

1332

1828

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

1333

1829

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

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)

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:

1341

1838

# Emit D-Bus signal

1342

1839

self.CheckerCompleted(dbus.Int16(exitstatus),

1343

dbus.Int64(condition),

1840

# This is specific to GNU libC

1841

dbus.Int64(exitstatus << 8),

1344

1842

dbus.String(command))

1345

1843

else:

1346

1844

# Emit D-Bus signal

1347

1845

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

1348

dbus.Int64(condition),

1846

dbus.Int64(

1847

# This is specific to GNU libC

1848

(exitstatus << 8)

1849

| self.last_checker_signal),

1349

1850

dbus.String(command))

1350

1351

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

1352

*args, **kwargs)

1353

1851

return ret

1852

1354

1853

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

1355

1854

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

1356

1855

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

1360

1859

# Emit D-Bus signal

1361

1860

self.CheckerStarted(self.current_checker_command)

1362

1861

return r

1363

1862

1364

1863

def _reset_approved(self):

1365

1864

self.approved = None

1366

1865

return False

1367

1866

1368

1867

def approve(self, value=True):

1369

1868

self.approved = value

1370

gobject.timeout_add(timedelta_to_milliseconds

1371

(self.approval_duration),

1372

self._reset_approved)

1869

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

1870

* 1000), self._reset_approved)

1373

1871

self.send_changedstate()

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

1872

1873

# D-Bus methods, signals & properties

1874

1875

# Interfaces

1876

1877

# Signals

1878

1387

1879

# CheckerCompleted - signal

1388

1880

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

1389

1881

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

1390

1882

"D-Bus signal"

1391

1883

pass

1392

1884

1393

1885

# CheckerStarted - signal

1394

1886

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

1395

1887

def CheckerStarted(self, command):

1396

1888

"D-Bus signal"

1397

1889

pass

1398

1890

1399

1891

# PropertyChanged - signal

1892

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

1400

1893

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

1401

1894

def PropertyChanged(self, property, value):

1402

1895

"D-Bus signal"

1403

1896

pass

1404

1897

1405

1898

# GotSecret - signal

1406

1899

@dbus.service.signal(_interface)

1407

1900

def GotSecret(self):

1410

1903

server to mandos-client

1411

1904

"""

1412

1905

pass

1413

1906

1414

1907

# Rejected - signal

1415

1908

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

1416

1909

def Rejected(self, reason):

1417

1910

"D-Bus signal"

1418

1911

pass

1419

1912

1420

1913

# NeedApproval - signal

1421

1914

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

1422

1915

def NeedApproval(self, timeout, default):

1423

1916

"D-Bus signal"

1424

1917

return self.need_approval()

1425

1426

## Methods

1427

1918

1919

# Methods

1920

1428

1921

# Approve - method

1429

1922

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

1430

1923

def Approve(self, value):

1431

1924

self.approve(value)

1432

1925

1433

1926

# CheckedOK - method

1434

1927

@dbus.service.method(_interface)

1435

1928

def CheckedOK(self):

1436

1929

self.checked_ok()

1437

1930

1438

1931

# Enable - method

1932

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

1439

1933

@dbus.service.method(_interface)

1440

1934

def Enable(self):

1441

1935

"D-Bus method"

1442

1936

self.enable()

1443

1937

1444

1938

# StartChecker - method

1939

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

1445

1940

@dbus.service.method(_interface)

1446

1941

def StartChecker(self):

1447

1942

"D-Bus method"

1448

1943

self.start_checker()

1449

1944

1450

1945

# Disable - method

1946

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

1451

1947

@dbus.service.method(_interface)

1452

1948

def Disable(self):

1453

1949

"D-Bus method"

1454

1950

self.disable()

1455

1951

1456

1952

# StopChecker - method

1953

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

1457

1954

@dbus.service.method(_interface)

1458

1955

def StopChecker(self):

1459

1956

self.stop_checker()

1460

1461

## Properties

1462

1957

1958

# Properties

1959

1463

1960

# ApprovalPending - property

1464

1961

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

1465

1962

def ApprovalPending_dbus_property(self):

1466

1963

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

1467

1964

1468

1965

# ApprovedByDefault - property

1469

@dbus_service_property(_interface, signature="b",

1966

@dbus_service_property(_interface,

1967

signature="b",

1470

1968

access="readwrite")

1471

1969

def ApprovedByDefault_dbus_property(self, value=None):

1472

1970

if value is None: # get

1473

1971

return dbus.Boolean(self.approved_by_default)

1474

1972

self.approved_by_default = bool(value)

1475

1973

1476

1974

# ApprovalDelay - property

1477

@dbus_service_property(_interface, signature="t",

1975

@dbus_service_property(_interface,

1976

signature="t",

1478

1977

access="readwrite")

1479

1978

def ApprovalDelay_dbus_property(self, value=None):

1480

1979

if value is None: # get

1481

return dbus.UInt64(self.approval_delay_milliseconds())

1980

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

1981

* 1000)

1482

1982

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

1483

1983

1484

1984

# ApprovalDuration - property

1485

@dbus_service_property(_interface, signature="t",

1985

@dbus_service_property(_interface,

1986

signature="t",

1486

1987

access="readwrite")

1487

1988

def ApprovalDuration_dbus_property(self, value=None):

1488

1989

if value is None: # get

1489

return dbus.UInt64(timedelta_to_milliseconds(

1490

self.approval_duration))

1990

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

1991

* 1000)

1491

1992

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

1492

1993

1493

1994

# Name - property

1995

@dbus_annotations(

1996

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

1494

1997

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

1495

1998

def Name_dbus_property(self):

1496

1999

return dbus.String(self.name)

1497

2000

1498

2001

# Fingerprint - property

2002

@dbus_annotations(

2003

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

1499

2004

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

1500

2005

def Fingerprint_dbus_property(self):

1501

2006

return dbus.String(self.fingerprint)

1502

2007

1503

2008

# Host - property

1504

@dbus_service_property(_interface, signature="s",

2009

@dbus_service_property(_interface,

2010

signature="s",

1505

2011

access="readwrite")

1506

2012

def Host_dbus_property(self, value=None):

1507

2013

if value is None: # get

1508

2014

return dbus.String(self.host)

1509

self.host = unicode(value)

1510

2015

self.host = str(value)

2016

1511

2017

# Created - property

2018

@dbus_annotations(

2019

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

1512

2020

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

1513

2021

def Created_dbus_property(self):

1514

2022

return datetime_to_dbus(self.created)

1515

2023

1516

2024

# LastEnabled - property

1517

2025

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

1518

2026

def LastEnabled_dbus_property(self):

1519

2027

return datetime_to_dbus(self.last_enabled)

1520

2028

1521

2029

# Enabled - property

1522

@dbus_service_property(_interface, signature="b",

2030

@dbus_service_property(_interface,

2031

signature="b",

1523

2032

access="readwrite")

1524

2033

def Enabled_dbus_property(self, value=None):

1525

2034

if value is None: # get

1528

2037

self.enable()

1529

2038

else:

1530

2039

self.disable()

1531

2040

1532

2041

# LastCheckedOK - property

1533

@dbus_service_property(_interface, signature="s",

2042

@dbus_service_property(_interface,

2043

signature="s",

1534

2044

access="readwrite")

1535

2045

def LastCheckedOK_dbus_property(self, value=None):

1536

2046

if value is not None:

1537

2047

self.checked_ok()

1538

2048

return

1539

2049

return datetime_to_dbus(self.last_checked_ok)

1540

2050

1541

2051

# LastCheckerStatus - property

1542

@dbus_service_property(_interface, signature="n",

1543

access="read")

2052

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

1544

2053

def LastCheckerStatus_dbus_property(self):

1545

2054

return dbus.Int16(self.last_checker_status)

1546

2055

1547

2056

# Expires - property

1548

2057

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

1549

2058

def Expires_dbus_property(self):

1550

2059

return datetime_to_dbus(self.expires)

1551

2060

1552

2061

# LastApprovalRequest - property

1553

2062

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

1554

2063

def LastApprovalRequest_dbus_property(self):

1555

2064

return datetime_to_dbus(self.last_approval_request)

1556

2065

1557

2066

# Timeout - property

1558

@dbus_service_property(_interface, signature="t",

2067

@dbus_service_property(_interface,

2068

signature="t",

1559

2069

access="readwrite")

1560

2070

def Timeout_dbus_property(self, value=None):

1561

2071

if value is None: # get

1562

return dbus.UInt64(self.timeout_milliseconds())

2072

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

1563

2073

old_timeout = self.timeout

1564

2074

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

1565

2075

# Reschedule disabling

1573

2083

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

1574

2084

is None):

1575

2085

return

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

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

1582

2091

# ExtendedTimeout - property

1583

@dbus_service_property(_interface, signature="t",

2092

@dbus_service_property(_interface,

2093

signature="t",

1584

2094

access="readwrite")

1585

2095

def ExtendedTimeout_dbus_property(self, value=None):

1586

2096

if value is None: # get

1587

return dbus.UInt64(self.extended_timeout_milliseconds())

2097

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

2098

* 1000)

1588

2099

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

1589

2100

1590

2101

# Interval - property

1591

@dbus_service_property(_interface, signature="t",

2102

@dbus_service_property(_interface,

2103

signature="t",

1592

2104

access="readwrite")

1593

2105

def Interval_dbus_property(self, value=None):

1594

2106

if value is None: # get

1595

return dbus.UInt64(self.interval_milliseconds())

2107

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

1596

2108

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

1597

2109

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

1598

2110

return

1599

2111

if self.enabled:

1600

2112

# Reschedule checker run

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

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

1606

2118

# Checker - property

1607

@dbus_service_property(_interface, signature="s",

2119

@dbus_service_property(_interface,

2120

signature="s",

1608

2121

access="readwrite")

1609

2122

def Checker_dbus_property(self, value=None):

1610

2123

if value is None: # get

1611

2124

return dbus.String(self.checker_command)

1612

self.checker_command = unicode(value)

1613

2125

self.checker_command = str(value)

2126

1614

2127

# CheckerRunning - property

1615

@dbus_service_property(_interface, signature="b",

2128

@dbus_service_property(_interface,

2129

signature="b",

1616

2130

access="readwrite")

1617

2131

def CheckerRunning_dbus_property(self, value=None):

1618

2132

if value is None: # get

1621

2135

self.start_checker()

1622

2136

else:

1623

2137

self.stop_checker()

1624

2138

1625

2139

# ObjectPath - property

2140

@dbus_annotations(

2141

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

2142

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

1626

2143

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

1627

2144

def ObjectPath_dbus_property(self):

1628

return self.dbus_object_path # is already a dbus.ObjectPath

1629

2145

return self.dbus_object_path # is already a dbus.ObjectPath

2146

1630

2147

# Secret = property

1631

@dbus_service_property(_interface, signature="ay",

1632

access="write", byte_arrays=True)

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)

1633

2155

def Secret_dbus_property(self, value):

1634

self.secret = str(value)

1635

2156

self.secret = bytes(value)

2157

1636

2158

del _interface

1637

2159

1638

2160

1641

2163

self._pipe = child_pipe

1642

2164

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

1643

2165

if not self._pipe.recv():

1644

raise KeyError()

1645

2166

raise KeyError(fpr)

2167

1646

2168

def __getattribute__(self, name):

1647

2169

if name == '_pipe':

1648

2170

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

1651

2173

if data[0] == 'data':

1652

2174

return data[1]

1653

2175

if data[0] == 'function':

2176

1654

2177

def func(*args, **kwargs):

1655

2178

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

1656

2179

return self._pipe.recv()[1]

2180

1657

2181

return func

1658

2182

1659

2183

def __setattr__(self, name, value):

1660

2184

if name == '_pipe':

1661

2185

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

1664

2188

1665

2189

class ClientHandler(socketserver.BaseRequestHandler, object):

1666

2190

"""A class to handle client connections.

1667

2191

1668

2192

Instantiated once for each connection to handle it.

1669

2193

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

1670

2194

1671

2195

def handle(self):

1672

2196

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

1673

2197

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

1674

unicode(self.client_address))

2198

str(self.client_address))

1675

2199

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

1676

2200

self.server.child_pipe.fileno())

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"))

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"))

1692

2208

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

1693

2209

priority = self.server.gnutls_priority

1694

2210

if priority is None:

1695

2211

priority = "NORMAL"

1696

(gnutls.library.functions

1697

.gnutls_priority_set_direct(session._c_object,

1698

priority, None))

1699

2212

gnutls.priority_set_direct(session._c_object,

2213

priority.encode("utf-8"),

2214

None)

2215

1700

2216

# Start communication using the Mandos protocol

1701

2217

# Get protocol number

1702

2218

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

1707

2223

except (ValueError, IndexError, RuntimeError) as error:

1708

2224

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

1709

2225

return

1710

2226

1711

2227

# Start GnuTLS connection

1712

2228

try:

1713

2229

session.handshake()

1714

except gnutls.errors.GNUTLSError as error:

2230

except gnutls.Error as error:

1715

2231

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

1716

2232

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

1717

2233

# established. Just abandon the request.

1718

2234

return

1719

2235

logger.debug("Handshake succeeded")

1720

2236

1721

2237

approval_required = False

1722

2238

try:

1723

2239

try:

1724

fpr = self.fingerprint(self.peer_certificate

1725

(session))

1726

except (TypeError,

1727

gnutls.errors.GNUTLSError) as error:

2240

fpr = self.fingerprint(

2241

self.peer_certificate(session))

2242

except (TypeError, gnutls.Error) as error:

1728

2243

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

1729

2244

return

1730

2245

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

1731

2246

1732

2247

try:

1733

2248

client = ProxyClient(child_pipe, fpr,

1734

2249

self.client_address)

1735

2250

except KeyError:

1736

2251

return

1737

2252

1738

2253

if client.approval_delay:

1739

2254

delay = client.approval_delay

1740

2255

client.approvals_pending += 1

1741

2256

approval_required = True

1742

2257

1743

2258

while True:

1744

2259

if not client.enabled:

1745

2260

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

1746

client.name)

2261

client.name)

1747

2262

if self.server.use_dbus:

1748

2263

# Emit D-Bus signal

1749

2264

client.Rejected("Disabled")

1750

2265

return

1751

2266

1752

2267

if client.approved or not client.approval_delay:

1753

#We are approved or approval is disabled

2268

# We are approved or approval is disabled

1754

2269

break

1755

2270

elif client.approved is None:

1756

2271

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

1758

2273

if self.server.use_dbus:

1759

2274

# Emit D-Bus signal

1760

2275

client.NeedApproval(

1761

client.approval_delay_milliseconds(),

1762

client.approved_by_default)

2276

client.approval_delay.total_seconds()

2277

* 1000, client.approved_by_default)

1763

2278

else:

1764

2279

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

1765

2280

client.name)

1767

2282

# Emit D-Bus signal

1768

2283

client.Rejected("Denied")

1769

2284

return

1770

1771

#wait until timeout or approved

2285

2286

# wait until timeout or approved

1772

2287

time = datetime.datetime.now()

1773

2288

client.changedstate.acquire()

1774

client.changedstate.wait(

1775

float(timedelta_to_milliseconds(delay)

1776

/ 1000))

2289

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

1777

2290

client.changedstate.release()

1778

2291

time2 = datetime.datetime.now()

1779

2292

if (time2 - time) >= delay:

1789

2302

break

1790

2303

else:

1791

2304

delay -= time2 - time

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

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

1806

2313

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

1807

2314

# bump the timeout using extended_timeout

1808

2315

client.bump_timeout(client.extended_timeout)

1809

2316

if self.server.use_dbus:

1810

2317

# Emit D-Bus signal

1811

2318

client.GotSecret()

1812

2319

1813

2320

finally:

1814

2321

if approval_required:

1815

2322

client.approvals_pending -= 1

1816

2323

try:

1817

2324

session.bye()

1818

except gnutls.errors.GNUTLSError as error:

2325

except gnutls.Error as error:

1819

2326

logger.warning("GnuTLS bye failed",

1820

2327

exc_info=error)

1821

2328

1822

2329

@staticmethod

1823

2330

def peer_certificate(session):

1824

2331

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

1825

2332

# If not an OpenPGP certificate...

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

2333

if (gnutls.certificate_type_get(session._c_object)

2334

!= gnutls.CRT_OPENPGP):

2335

# ...return invalid data

2336

return b""

1831

2337

list_size = ctypes.c_uint(1)

1832

cert_list = (gnutls.library.functions

1833

.gnutls_certificate_get_peers

2338

cert_list = (gnutls.certificate_get_peers

1834

2339

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

1835

2340

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

1836

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

1837

" certificate")

2341

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

1838

2342

if list_size.value == 0:

1839

2343

return None

1840

2344

cert = cert_list[0]

1841

2345

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

1842

2346

1843

2347

@staticmethod

1844

2348

def fingerprint(openpgp):

1845

2349

"Convert an OpenPGP bytestring to a hexdigit fingerprint"

1846

2350

# New GnuTLS "datum" with the OpenPGP public key

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))))

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)))

1852

2355

# New empty GnuTLS certificate

1853

crt = gnutls.library.types.gnutls_openpgp_crt_t()

1854

(gnutls.library.functions

1855

.gnutls_openpgp_crt_init(ctypes.byref(crt)))

2356

crt = gnutls.openpgp_crt_t()

2357

gnutls.openpgp_crt_init(ctypes.byref(crt))

1856

2358

# Import the OpenPGP public key into the certificate

1857

(gnutls.library.functions

1858

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

1859

gnutls.library.constants

1860

.GNUTLS_OPENPGP_FMT_RAW))

2359

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

2360

gnutls.OPENPGP_FMT_RAW)

1861

2361

# Verify the self signature in the key

1862

2362

crtverify = ctypes.c_uint()

1863

(gnutls.library.functions

1864

.gnutls_openpgp_crt_verify_self(crt, 0,

1865

ctypes.byref(crtverify)))

2363

gnutls.openpgp_crt_verify_self(crt, 0,

2364

ctypes.byref(crtverify))

1866

2365

if crtverify.value != 0:

1867

gnutls.library.functions.gnutls_openpgp_crt_deinit(crt)

1868

raise (gnutls.errors.CertificateSecurityError

1869

("Verify failed"))

2366

gnutls.openpgp_crt_deinit(crt)

2367

raise gnutls.CertificateSecurityError("Verify failed")

1870

2368

# New buffer for the fingerprint

1871

2369

buf = ctypes.create_string_buffer(20)

1872

2370

buf_len = ctypes.c_size_t()

1873

2371

# Get the fingerprint from the certificate into the buffer

1874

(gnutls.library.functions

1875

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

1876

ctypes.byref(buf_len)))

2372

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

2373

ctypes.byref(buf_len))

1877

2374

# Deinit the certificate

1878

gnutls.library.functions.gnutls_openpgp_crt_deinit(crt)

2375

gnutls.openpgp_crt_deinit(crt)

1879

2376

# Convert the buffer to a Python bytestring

1880

2377

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

1881

2378

# Convert the bytestring to hexadecimal notation

1885

2382

1886

2383

class MultiprocessingMixIn(object):

1887

2384

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

2385

1888

2386

def sub_process_main(self, request, address):

1889

2387

try:

1890

2388

self.finish_request(request, address)

1891

2389

except Exception:

1892

2390

self.handle_error(request, address)

1893

2391

self.close_request(request)

1894

2392

1895

2393

def process_request(self, request, address):

1896

2394

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

1897

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

1898

args = (request, address))

2395

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

2396

args=(request, address))

1899

2397

proc.start()

1900

2398

return proc

1901

2399

1902

2400

1903

2401

class MultiprocessingMixInWithPipe(MultiprocessingMixIn, object):

1904

2402

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

2403

1905

2404

def process_request(self, request, client_address):

1906

2405

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

1907

2406

1908

2407

This function creates a new pipe in self.pipe

1909

2408

"""

1910

2409

parent_pipe, self.child_pipe = multiprocessing.Pipe()

1911

2410

1912

2411

proc = MultiprocessingMixIn.process_request(self, request,

1913

2412

client_address)

1914

2413

self.child_pipe.close()

1915

2414

self.add_pipe(parent_pipe, proc)

1916

2415

1917

2416

def add_pipe(self, parent_pipe, proc):

1918

2417

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

1919

2418

raise NotImplementedError()

1922

2421

class IPv6_TCPServer(MultiprocessingMixInWithPipe,

1923

2422

socketserver.TCPServer, object):

1924

2423

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

1925

2424

1926

2425

Attributes:

1927

2426

enabled: Boolean; whether this server is activated yet

1928

2427

interface: None or a network interface name (string)

1929

2428

use_ipv6: Boolean; to use IPv6 or not

1930

2429

"""

2430

1931

2431

def __init__(self, server_address, RequestHandlerClass,

1932

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

2432

interface=None,

2433

use_ipv6=True,

2434

socketfd=None):

1933

2435

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

1934

2436

creating a new one with socket.socket().

1935

2437

"""

1941

2443

self.socketfd = socketfd

1942

2444

# Save the original socket.socket() function

1943

2445

self.socket_socket = socket.socket

2446

1944

2447

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

1945

#

2448

#

1946

2449

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

1947

2450

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

1948

2451

# patching socket.socket.)

1949

#

2452

#

1950

2453

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

1951

2454

@functools.wraps(socket.socket)

1952

2455

def socket_wrapper(*args, **kwargs):

1964

2467

# socket_wrapper(), if socketfd was set.

1965

2468

socketserver.TCPServer.__init__(self, server_address,

1966

2469

RequestHandlerClass)

1967

2470

1968

2471

def server_bind(self):

1969

2472

"""This overrides the normal server_bind() function

1970

2473

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

1971

2474

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

2475

global SO_BINDTODEVICE

1972

2476

if self.interface is not None:

1973

2477

if SO_BINDTODEVICE is None:

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

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

1995

2499

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

1996

2500

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

1997

2501

if not self.server_address[0]:

1998

2502

if self.address_family == socket.AF_INET6:

1999

any_address = "::" # in6addr_any

2503

any_address = "::" # in6addr_any

2000

2504

else:

2001

any_address = "0.0.0.0" # INADDR_ANY

2505

any_address = "0.0.0.0" # INADDR_ANY

2002

2506

self.server_address = (any_address,

2003

2507

self.server_address[1])

2004

2508

elif not self.server_address[1]:

2005

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

2006

0)

2509

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

2007

2510

# if self.interface:

2008

2511

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

2009

2512

# 0, # port

2015

2518

2016

2519

class MandosServer(IPv6_TCPServer):

2017

2520

"""Mandos server.

2018

2521

2019

2522

Attributes:

2020

2523

clients: set of Client objects

2021

2524

gnutls_priority GnuTLS priority string

2022

2525

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

2023

2024

Assumes a gobject.MainLoop event loop.

2526

2527

Assumes a GLib.MainLoop event loop.

2025

2528

"""

2529

2026

2530

def __init__(self, server_address, RequestHandlerClass,

2027

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

2028

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

2531

interface=None,

2532

use_ipv6=True,

2533

clients=None,

2534

gnutls_priority=None,

2535

use_dbus=True,

2536

socketfd=None):

2029

2537

self.enabled = False

2030

2538

self.clients = clients

2031

2539

if self.clients is None:

2034

2542

self.gnutls_priority = gnutls_priority

2035

2543

IPv6_TCPServer.__init__(self, server_address,

2036

2544

RequestHandlerClass,

2037

interface = interface,

2038

use_ipv6 = use_ipv6,

2039

socketfd = socketfd)

2545

interface=interface,

2546

use_ipv6=use_ipv6,

2547

socketfd=socketfd)

2548

2040

2549

def server_activate(self):

2041

2550

if self.enabled:

2042

2551

return socketserver.TCPServer.server_activate(self)

2043

2552

2044

2553

def enable(self):

2045

2554

self.enabled = True

2046

2555

2047

2556

def add_pipe(self, parent_pipe, proc):

2048

2557

# Call "handle_ipc" for both data and EOF events

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):

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):

2058

2569

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

2059

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

2570

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

2060

2571

# Wait for other process to exit

2061

2572

proc.join()

2062

2573

return False

2063

2574

2064

2575

# Read a request from the child

2065

2576

request = parent_pipe.recv()

2066

2577

command = request[0]

2067

2578

2068

2579

if command == 'init':

2069

2580

fpr = request[1]

2070

2581

address = request[2]

2071

2072

for c in self.clients.itervalues():

2582

2583

for c in self.clients.values():

2073

2584

if c.fingerprint == fpr:

2074

2585

client = c

2075

2586

break

2082

2593

address[0])

2083

2594

parent_pipe.send(False)

2084

2595

return False

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))

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))

2094

2604

parent_pipe.send(True)

2095

2605

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

2096

2606

# same fileno

2099

2609

funcname = request[1]

2100

2610

args = request[2]

2101

2611

kwargs = request[3]

2102

2612

2103

2613

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

2104

2614

funcname)(*args,

2105

**kwargs)))

2106

2615

**kwargs)))

2616

2107

2617

if command == 'getattr':

2108

2618

attrname = request[1]

2109

if callable(client_object.__getattribute__(attrname)):

2110

parent_pipe.send(('function',))

2619

if isinstance(client_object.__getattribute__(attrname),

2620

collections.Callable):

2621

parent_pipe.send(('function', ))

2111

2622

else:

2112

parent_pipe.send(('data', client_object

2113

.__getattribute__(attrname)))

2114

2623

parent_pipe.send((

2624

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

2625

2115

2626

if command == 'setattr':

2116

2627

attrname = request[1]

2117

2628

value = request[2]

2118

2629

setattr(client_object, attrname, value)

2119

2630

2120

2631

return True

2121

2632

2122

2633

2123

2634

def rfc3339_duration_to_delta(duration):

2124

2635

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

2125

2636

2126

2637

>>> rfc3339_duration_to_delta("P7D")

2127

2638

datetime.timedelta(7)

2128

2639

>>> rfc3339_duration_to_delta("PT60S")

2138

2649

>>> rfc3339_duration_to_delta("P1DT3M20S")

2139

2650

datetime.timedelta(1, 200)

2140

2651

"""

2141

2652

2142

2653

# Parsing an RFC 3339 duration with regular expressions is not

2143

2654

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

2144

2655

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

2145

2656

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

2146

2657

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

2147

2658

# avoid excessive use of external libraries.

2148

2659

2149

2660

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

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

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

2159

2666

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

2160

2667

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

2161

2668

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

2162

2669

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

2163

2670

datetime.timedelta(seconds=1),

2164

frozenset((token_end,)))

2671

frozenset((token_end, )))

2165

2672

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

2166

2673

datetime.timedelta(minutes=1),

2167

2674

frozenset((token_second, token_end)))

2183

2690

frozenset((token_month, token_end)))

2184

2691

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

2185

2692

datetime.timedelta(weeks=1),

2186

frozenset((token_end,)))

2693

frozenset((token_end, )))

2187

2694

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

2188

2695

frozenset((token_year, token_month,

2189

2696

token_day, token_time,

2190

token_week))),

2191

# Define starting values

2192

value = datetime.timedelta() # Value so far

2697

token_week)))

2698

# Define starting values:

2699

# Value so far

2700

value = datetime.timedelta()

2193

2701

found_token = None

2194

followers = frozenset(token_duration,) # Following valid tokens

2195

s = duration # String left to parse

2702

# Following valid tokens

2703

followers = frozenset((token_duration, ))

2704

# String left to parse

2705

s = duration

2196

2706

# Loop until end token is found

2197

2707

while found_token is not token_end:

2198

2708

# Search for any currently valid tokens

2214

2724

break

2215

2725

else:

2216

2726

# No currently valid tokens were found

2217

raise ValueError("Invalid RFC 3339 duration")

2727

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

2728

.format(duration))

2218

2729

# End token found

2219

2730

return value

2220

2731

2221

2732

2222

2733

def string_to_delta(interval):

2223

2734

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

2224

2735

2225

2736

>>> string_to_delta('7d')

2226

2737

datetime.timedelta(7)

2227

2738

>>> string_to_delta('60s')

2235

2746

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

2236

2747

datetime.timedelta(0, 330)

2237

2748

"""

2238

2749

2239

2750

try:

2240

2751

return rfc3339_duration_to_delta(interval)

2241

2752

except ValueError:

2242

2753

pass

2243

2754

2244

2755

timevalue = datetime.timedelta(0)

2245

2756

for s in interval.split():

2246

2757

try:

2247

suffix = unicode(s[-1])

2758

suffix = s[-1]

2248

2759

value = int(s[:-1])

2249

2760

if suffix == "d":

2250

2761

delta = datetime.timedelta(value)

2257

2768

elif suffix == "w":

2258

2769

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

2259

2770

else:

2260

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

2261

.format(suffix))

2771

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

2262

2772

except IndexError as e:

2263

2773

raise ValueError(*(e.args))

2264

2774

timevalue += delta

2265

2775

return timevalue

2266

2776

2267

2777

2268

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

2778

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

2269

2779

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

2270

2780

2271

2781

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

2272

2782

if os.fork():

2273

2783

sys.exit()

2281

2791

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

2282

2792

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

2283

2793

raise OSError(errno.ENODEV,

2284

"{0} not a character device"

2794

"{} not a character device"

2285

2795

.format(os.devnull))

2286

2796

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

2287

2797

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

2291

2801

2292

2802

2293

2803

def main():

2294

2804

2295

2805

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

2296

2806

# Parsing of options, both command line and config file

2297

2807

2298

2808

parser = argparse.ArgumentParser()

2299

2809

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

2300

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

2810

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

2301

2811

help="show version number and exit")

2302

2812

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

2303

2813

help="Bind to interface IF")

2336

2846

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

2337

2847

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

2338

2848

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

2339

2849

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

2850

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

2851

default=None)

2852

2340

2853

options = parser.parse_args()

2341

2854

2342

2855

if options.check:

2343

2856

import doctest

2344

2857

fail_count, test_count = doctest.testmod()

2345

2858

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

2346

2859

2347

2860

# Default values for config file for server-global settings

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

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

2364

2879

# Parse config file for server-global settings

2365

2880

server_config = configparser.SafeConfigParser(server_defaults)

2366

2881

del server_defaults

2367

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

2368

"mandos.conf"))

2882

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

2369

2883

# Convert the SafeConfigParser object to a dict

2370

2884

server_settings = server_config.defaults()

2371

2885

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

2385

2899

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

2386

2900

["socket"])

2387

2901

del server_config

2388

2902

2389

2903

# Override the settings from the config file with command line

2390

2904

# options, if set.

2391

2905

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

2392

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

2393

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

2394

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

2906

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

2907

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

2908

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

2395

2909

value = getattr(options, option)

2396

2910

if value is not None:

2397

2911

server_settings[option] = value

2398

2912

del options

2399

2913

# Force all strings to be unicode

2400

2914

for option in server_settings.keys():

2401

if type(server_settings[option]) is str:

2402

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

2915

if isinstance(server_settings[option], bytes):

2916

server_settings[option] = (server_settings[option]

2917

.decode("utf-8"))

2403

2918

# Force all boolean options to be boolean

2404

2919

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

2405

"foreground"):

2920

"foreground", "zeroconf"):

2406

2921

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

2407

2922

# Debug implies foreground

2408

2923

if server_settings["debug"]:

2409

2924

server_settings["foreground"] = True

2410

2925

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

2411

2926

2412

2927

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

2413

2928

2929

if (not server_settings["zeroconf"]

2930

and not (server_settings["port"]

2931

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

2932

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

2933

2414

2934

# For convenience

2415

2935

debug = server_settings["debug"]

2416

2936

debuglevel = server_settings["debuglevel"]

2419

2939

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

2420

2940

stored_state_file)

2421

2941

foreground = server_settings["foreground"]

2422

2942

zeroconf = server_settings["zeroconf"]

2943

2423

2944

if debug:

2424

2945

initlogger(debug, logging.DEBUG)

2425

2946

else:

2428

2949

else:

2429

2950

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

2430

2951

initlogger(debug, level)

2431

2952

2432

2953

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

2433

syslogger.setFormatter(logging.Formatter

2434

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

2435

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

2436

.format(server_settings

2437

["servicename"])))

2438

2954

syslogger.setFormatter(

2955

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

2956

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

2957

server_settings["servicename"])))

2958

2439

2959

# Parse config file with clients

2440

2960

client_config = configparser.SafeConfigParser(Client

2441

2961

.client_defaults)

2442

2962

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

2443

2963

"clients.conf"))

2444

2964

2445

2965

global mandos_dbus_service

2446

2966

mandos_dbus_service = None

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))

2967

2968

socketfd = None

2969

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

2970

socketfd = server_settings["socket"]

2971

tcp_server = MandosServer(

2972

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

2973

ClientHandler,

2974

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

2975

use_ipv6=use_ipv6,

2976

gnutls_priority=server_settings["priority"],

2977

use_dbus=use_dbus,

2978

socketfd=socketfd)

2459

2979

if not foreground:

2460

2980

pidfilename = "/run/mandos.pid"

2461

2981

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

2462

2982

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

2463

2983

pidfile = None

2464

2984

try:

2465

pidfile = open(pidfilename, "w")

2985

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

2466

2986

except IOError as e:

2467

2987

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

2468

2988

exc_info=e)

2469

2470

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

2989

2990

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

2991

("mandos", "mandos"),

2992

("nobody", "nogroup")):

2471

2993

try:

2472

2994

uid = pwd.getpwnam(name).pw_uid

2473

gid = pwd.getpwnam(name).pw_gid

2995

gid = pwd.getpwnam(group).pw_gid

2474

2996

break

2475

2997

except KeyError:

2476

2998

continue

2480

3002

try:

2481

3003

os.setgid(gid)

2482

3004

os.setuid(uid)

3005

if debug:

3006

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

3007

gid))

2483

3008

except OSError as error:

3009

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

3010

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

2484

3011

if error.errno != errno.EPERM:

2485

3012

raise

2486

3013

2487

3014

if debug:

2488

3015

# Enable all possible GnuTLS debugging

2489

3016

2490

3017

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

2491

3018

# - GnuTLS manual

2492

gnutls.library.functions.gnutls_global_set_log_level(11)

2493

2494

@gnutls.library.types.gnutls_log_func

3019

gnutls.global_set_log_level(11)

3020

3021

@gnutls.log_func

2495

3022

def debug_gnutls(level, string):

2496

3023

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

2497

2498

(gnutls.library.functions

2499

.gnutls_global_set_log_function(debug_gnutls))

2500

3024

3025

gnutls.global_set_log_function(debug_gnutls)

3026

2501

3027

# Redirect stdin so all checkers get /dev/null

2502

3028

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

2503

3029

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

2504

3030

if null > 2:

2505

3031

os.close(null)

2506

3032

2507

3033

# Need to fork before connecting to D-Bus

2508

3034

if not foreground:

2509

3035

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

2510

3036

daemon()

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

3037

3038

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

3039

# to inform GLib that threads will be used.

3040

GLib.threads_init()

3041

2516

3042

global main_loop

2517

3043

# From the Avahi example code

2518

3044

DBusGMainLoop(set_as_default=True)

2519

main_loop = gobject.MainLoop()

3045

main_loop = GLib.MainLoop()

2520

3046

bus = dbus.SystemBus()

2521

3047

# End of Avahi example code

2522

3048

if use_dbus:

2523

3049

try:

2524

3050

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

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:

3051

bus,

3052

do_not_queue=True)

3053

old_bus_name = dbus.service.BusName(

3054

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

3055

do_not_queue=True)

3056

except dbus.exceptions.DBusException as e:

2530

3057

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

2531

3058

use_dbus = False

2532

3059

server_settings["use_dbus"] = False

2533

3060

tcp_server.use_dbus = False

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

3061

if zeroconf:

3062

protocol = avahi.PROTO_INET6 if use_ipv6 else avahi.PROTO_INET

3063

service = AvahiServiceToSyslog(

3064

name=server_settings["servicename"],

3065

servicetype="_mandos._tcp",

3066

protocol=protocol,

3067

bus=bus)

3068

if server_settings["interface"]:

3069

service.interface = if_nametoindex(

3070

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

3071

2543

3072

global multiprocessing_manager

2544

3073

multiprocessing_manager = multiprocessing.Manager()

2545

3074

2546

3075

client_class = Client

2547

3076

if use_dbus:

2548

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

2549

3077

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

3078

2550

3079

client_settings = Client.config_parser(client_config)

2551

3080

old_client_settings = {}

2552

3081

clients_data = {}

2553

3082

2554

3083

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

2555

3084

global wnull

2556

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

3085

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

2557

3086

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

2558

3087

# mode

2559

3088

if debug or not foreground:

2560

3089

wnull.close()

2561

3090

2562

3091

# Get client data and settings from last running state.

2563

3092

if server_settings["restore"]:

2564

3093

try:

2565

3094

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

2566

clients_data, old_client_settings = (pickle.load

2567

(stored_state))

3095

if sys.version_info.major == 2:

3096

clients_data, old_client_settings = pickle.load(

3097

stored_state)

3098

else:

3099

bytes_clients_data, bytes_old_client_settings = (

3100

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

3101

# Fix bytes to strings

3102

# clients_data

3103

# .keys()

3104

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

3105

if isinstance(key, bytes)

3106

else key): value

3107

for key, value in

3108

bytes_clients_data.items()}

3109

del bytes_clients_data

3110

for key in clients_data:

3111

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

3112

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

3113

for k, v in

3114

clients_data[key].items()}

3115

clients_data[key] = value

3116

# .client_structure

3117

value["client_structure"] = [

3118

(s.decode("utf-8")

3119

if isinstance(s, bytes)

3120

else s) for s in

3121

value["client_structure"]]

3122

# .name & .host

3123

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

3124

if isinstance(value[k], bytes):

3125

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

3126

# old_client_settings

3127

# .keys()

3128

old_client_settings = {

3129

(key.decode("utf-8")

3130

if isinstance(key, bytes)

3131

else key): value

3132

for key, value in

3133

bytes_old_client_settings.items()}

3134

del bytes_old_client_settings

3135

# .host

3136

for value in old_client_settings.values():

3137

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

3138

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

3139

.decode("utf-8"))

2568

3140

os.remove(stored_state_path)

2569

3141

except IOError as e:

2570

3142

if e.errno == errno.ENOENT:

2571

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

2572

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

3143

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

3144

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

2573

3145

else:

2574

3146

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

2575

3147

exc_info=e)

2576

3148

raise

2577

3149

except EOFError as e:

2578

3150

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

2579

"EOFError:", exc_info=e)

2580

3151

"EOFError:",

3152

exc_info=e)

3153

2581

3154

with PGPEngine() as pgp:

2582

for client_name, client in clients_data.iteritems():

3155

for client_name, client in clients_data.items():

2583

3156

# Skip removed clients

2584

3157

if client_name not in client_settings:

2585

3158

continue

2586

3159

2587

3160

# Decide which value to use after restoring saved state.

2588

3161

# We have three different values: Old config file,

2589

3162

# new config file, and saved state.

2594

3167

# For each value in new config, check if it

2595

3168

# differs from the old config value (Except for

2596

3169

# the "secret" attribute)

2597

if (name != "secret" and

2598

value != old_client_settings[client_name]

2599

[name]):

3170

if (name != "secret"

3171

and (value !=

3172

old_client_settings[client_name][name])):

2600

3173

client[name] = value

2601

3174

except KeyError:

2602

3175

pass

2603

3176

2604

3177

# Clients who has passed its expire date can still be

2605

# enabled if its last checker was successful. Clients

3178

# enabled if its last checker was successful. A Client

2606

3179

# whose checker succeeded before we stored its state is

2607

3180

# assumed to have successfully run all checkers during

2608

3181

# downtime.

2610

3183

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

2611

3184

if not client["last_checked_ok"]:

2612

3185

logger.warning(

2613

"disabling client {0} - Client never "

2614

"performed a successful checker"

2615

.format(client_name))

3186

"disabling client {} - Client never "

3187

"performed a successful checker".format(

3188

client_name))

2616

3189

client["enabled"] = False

2617

3190

elif client["last_checker_status"] != 0:

2618

3191

logger.warning(

2619

"disabling client {0} - Client "

2620

"last checker failed with error code {1}"

2621

.format(client_name,

2622

client["last_checker_status"]))

3192

"disabling client {} - Client last"

3193

" checker failed with error code"

3194

" {}".format(

3195

client_name,

3196

client["last_checker_status"]))

2623

3197

client["enabled"] = False

2624

3198

else:

2625

client["expires"] = (datetime.datetime

2626

.utcnow()

2627

+ client["timeout"])

3199

client["expires"] = (

3200

datetime.datetime.utcnow()

3201

+ client["timeout"])

2628

3202

logger.debug("Last checker succeeded,"

2629

" keeping {0} enabled"

2630

.format(client_name))

3203

" keeping {} enabled".format(

3204

client_name))

2631

3205

try:

2632

client["secret"] = (

2633

pgp.decrypt(client["encrypted_secret"],

2634

client_settings[client_name]

2635

["secret"]))

3206

client["secret"] = pgp.decrypt(

3207

client["encrypted_secret"],

3208

client_settings[client_name]["secret"])

2636

3209

except PGPError:

2637

3210

# If decryption fails, we use secret from new settings

2638

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

2639

.format(client_name))

2640

client["secret"] = (

2641

client_settings[client_name]["secret"])

2642

3211

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

3212

client_name))

3213

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

3214

["secret"])

3215

2643

3216

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

2644

3217

for client_name in (set(old_client_settings)

2645

3218

- set(client_settings)):

2647

3220

for client_name in (set(client_settings)

2648

3221

- set(old_client_settings)):

2649

3222

clients_data[client_name] = client_settings[client_name]

2650

3223

2651

3224

# Create all client objects

2652

for client_name, client in clients_data.iteritems():

3225

for client_name, client in clients_data.items():

2653

3226

tcp_server.clients[client_name] = client_class(

2654

name = client_name, settings = client,

2655

server_settings = server_settings)

2656

3227

name=client_name,

3228

settings=client,

3229

server_settings=server_settings)

3230

2657

3231

if not tcp_server.clients:

2658

3232

logger.warning("No clients defined")

2659

3233

2660

3234

if not foreground:

2661

3235

if pidfile is not None:

3236

pid = os.getpid()

2662

3237

try:

2663

3238

with pidfile:

2664

pid = os.getpid()

2665

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

3239

print(pid, file=pidfile)

2666

3240

except IOError:

2667

3241

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

2668

3242

pidfilename, pid)

2669

3243

del pidfile

2670

3244

del pidfilename

2671

2672

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

2673

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

2674

3245

3246

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

3247

GLib.unix_signal_add(GLib.PRIORITY_HIGH, termsig,

3248

lambda: main_loop.quit() and False)

3249

2675

3250

if use_dbus:

2676

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

2677

"se.bsnet.fukt.Mandos"})

2678

class MandosDBusService(DBusObjectWithProperties):

3251

3252

@alternate_dbus_interfaces(

3253

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

3254

class MandosDBusService(DBusObjectWithObjectManager):

2679

3255

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

3256

2680

3257

def __init__(self):

2681

3258

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

3259

2682

3260

_interface = "se.recompile.Mandos"

2683

2684

@dbus_interface_annotations(_interface)

2685

def _foo(self):

2686

return { "org.freedesktop.DBus.Property"

2687

".EmitsChangedSignal":

2688

"false"}

2689

3261

2690

3262

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

2691

3263

def ClientAdded(self, objpath):

2692

3264

"D-Bus signal"

2693

3265

pass

2694

3266

2695

3267

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

2696

3268

def ClientNotFound(self, fingerprint, address):

2697

3269

"D-Bus signal"

2698

3270

pass

2699

3271

3272

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

3273

"true"})

2700

3274

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

2701

3275

def ClientRemoved(self, objpath, name):

2702

3276

"D-Bus signal"

2703

3277

pass

2704

3278

3279

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

3280

"true"})

2705

3281

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

2706

3282

def GetAllClients(self):

2707

3283

"D-Bus method"

2708

return dbus.Array(c.dbus_object_path

2709

for c in

2710

tcp_server.clients.itervalues())

2711

3284

return dbus.Array(c.dbus_object_path for c in

3285

tcp_server.clients.values())

3286

3287

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

3288

"true"})

2712

3289

@dbus.service.method(_interface,

2713

3290

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

2714

3291

def GetAllClientsWithProperties(self):

2715

3292

"D-Bus method"

2716

3293

return dbus.Dictionary(

2717

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

2718

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

3294

{c.dbus_object_path: c.GetAll(

3295

"se.recompile.Mandos.Client")

3296

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

2719

3297

signature="oa{sv}")

2720

3298

2721

3299

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

2722

3300

def RemoveClient(self, object_path):

2723

3301

"D-Bus method"

2724

for c in tcp_server.clients.itervalues():

3302

for c in tcp_server.clients.values():

2725

3303

if c.dbus_object_path == object_path:

2726

3304

del tcp_server.clients[c.name]

2727

3305

c.remove_from_connection()

2728

# Don't signal anything except ClientRemoved

3306

# Don't signal the disabling

2729

3307

c.disable(quiet=True)

2730

# Emit D-Bus signal

2731

self.ClientRemoved(object_path, c.name)

3308

# Emit D-Bus signal for removal

3309

self.client_removed_signal(c)

2732

3310

return

2733

3311

raise KeyError(object_path)

2734

3312

2735

3313

del _interface

2736

3314

3315

@dbus.service.method(dbus.OBJECT_MANAGER_IFACE,

3316

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

3317

def GetManagedObjects(self):

3318

"""D-Bus method"""

3319

return dbus.Dictionary(

3320

{client.dbus_object_path:

3321

dbus.Dictionary(

3322

{interface: client.GetAll(interface)

3323

for interface in

3324

client._get_all_interface_names()})

3325

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

3326

3327

def client_added_signal(self, client):

3328

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

3329

if use_dbus:

3330

# New standard signal

3331

self.InterfacesAdded(

3332

client.dbus_object_path,

3333

dbus.Dictionary(

3334

{interface: client.GetAll(interface)

3335

for interface in

3336

client._get_all_interface_names()}))

3337

# Old signal

3338

self.ClientAdded(client.dbus_object_path)

3339

3340

def client_removed_signal(self, client):

3341

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

3342

if use_dbus:

3343

# New standard signal

3344

self.InterfacesRemoved(

3345

client.dbus_object_path,

3346

client._get_all_interface_names())

3347

# Old signal

3348

self.ClientRemoved(client.dbus_object_path,

3349

client.name)

3350

2737

3351

mandos_dbus_service = MandosDBusService()

2738

3352

3353

# Save modules to variables to exempt the modules from being

3354

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

3355

mp = multiprocessing

3356

wn = wnull

3357

2739

3358

def cleanup():

2740

3359

"Cleanup function; run on exit"

2741

service.cleanup()

2742

2743

multiprocessing.active_children()

2744

wnull.close()

3360

if zeroconf:

3361

service.cleanup()

3362

3363

mp.active_children()

3364

wn.close()

2745

3365

if not (tcp_server.clients or client_settings):

2746

3366

return

2747

3367

2748

3368

# Store client before exiting. Secrets are encrypted with key

2749

3369

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

2750

3370

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

2751

3371

clients = {}

2752

3372

with PGPEngine() as pgp:

2753

for client in tcp_server.clients.itervalues():

3373

for client in tcp_server.clients.values():

2754

3374

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

2755

3375

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

2756

3376

key)

2757

3377

client_dict = {}

2758

3378

2759

3379

# A list of attributes that can not be pickled

2760

3380

# + secret.

2761

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

2762

"checker", "server_settings"))

2763

for name, typ in (inspect.getmembers

2764

(dbus.service.Object)):

3381

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

3382

"checker", "server_settings"}

3383

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

3384

.Object):

2765

3385

exclude.add(name)

2766

3386

2767

3387

client_dict["encrypted_secret"] = (client

2768

3388

.encrypted_secret)

2769

3389

for attr in client.client_structure:

2770

3390

if attr not in exclude:

2771

3391

client_dict[attr] = getattr(client, attr)

2772

3392

2773

3393

clients[client.name] = client_dict

2774

3394

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

2775

3395

2776

3396

try:

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

3397

with tempfile.NamedTemporaryFile(

3398

mode='wb',

3399

suffix=".pickle",

3400

prefix='clients-',

3401

dir=os.path.dirname(stored_state_path),

3402

delete=False) as stored_state:

3403

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

3404

protocol=2)

3405

tempname = stored_state.name

2783

3406

os.rename(tempname, stored_state_path)

2784

3407

except (IOError, OSError) as e:

2785

3408

if not debug:

2788

3411

except NameError:

2789

3412

pass

2790

3413

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

2791

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

3414

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

2792

3415

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

2793

3416

else:

2794

3417

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

2795

3418

exc_info=e)

2796

3419

raise

2797

3420

2798

3421

# Delete all clients, and settings from config

2799

3422

while tcp_server.clients:

2800

3423

name, client = tcp_server.clients.popitem()

2801

3424

if use_dbus:

2802

3425

client.remove_from_connection()

2803

# Don't signal anything except ClientRemoved

3426

# Don't signal the disabling

2804

3427

client.disable(quiet=True)

3428

# Emit D-Bus signal for removal

2805

3429

if use_dbus:

2806

# Emit D-Bus signal

2807

mandos_dbus_service.ClientRemoved(client

2808

.dbus_object_path,

2809

client.name)

3430

mandos_dbus_service.client_removed_signal(client)

2810

3431

client_settings.clear()

2811

3432

2812

3433

atexit.register(cleanup)

2813

2814

for client in tcp_server.clients.itervalues():

3434

3435

for client in tcp_server.clients.values():

2815

3436

if use_dbus:

2816

# Emit D-Bus signal

2817

mandos_dbus_service.ClientAdded(client.dbus_object_path)

3437

# Emit D-Bus signal for adding

3438

mandos_dbus_service.client_added_signal(client)

2818

3439

# Need to initiate checking of clients

2819

3440

if client.enabled:

2820

3441

client.init_checker()

2821

3442

2822

3443

tcp_server.enable()

2823

3444

tcp_server.server_activate()

2824

3445

2825

3446

# Find out what port we got

2826

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

3447

if zeroconf:

3448

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

2827

3449

if use_ipv6:

2828

3450

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

2829

3451

" flowinfo %d, scope_id %d",

2831

3453

else: # IPv4

2832

3454

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

2833

3455

*tcp_server.socket.getsockname())

2834

2835

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

2836

3456

3457

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

3458

2837

3459

try:

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

3460

if zeroconf:

3461

# From the Avahi example code

3462

try:

3463

service.activate()

3464

except dbus.exceptions.DBusException as error:

3465

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

3466

cleanup()

3467

sys.exit(1)

3468

# End of Avahi example code

3469

3470

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

3471

lambda *args, **kwargs:

3472

(tcp_server.handle_request

3473

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

3474

2852

3475

logger.debug("Starting main loop")

2853

3476

main_loop.run()

2854

3477

except AvahiError as error:

2863

3486

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

2864

3487

cleanup()

2865

3488

3489

2866

3490

if __name__ == '__main__':

2867

3491

main()