/mandos/trunk : revision 890

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 = "1.7.13"

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 "self" here, since this method is called before

519

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

520

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

521

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

522

.format(self._need_version))

523

524

# Unless otherwise indicated, the constants and types below are

525

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

526

527

# Constants

528

E_SUCCESS = 0

529

E_INTERRUPTED = -52

530

E_AGAIN = -28

531

CRT_OPENPGP = 2

532

CLIENT = 2

533

SHUT_RDWR = 0

534

CRD_CERTIFICATE = 1

535

E_NO_CERTIFICATE_FOUND = -49

536

OPENPGP_FMT_RAW = 0 # gnutls/openpgp.h

537

538

# Types

539

class session_int(ctypes.Structure):

540

_fields_ = []

541

session_t = ctypes.POINTER(session_int)

542

543

class certificate_credentials_st(ctypes.Structure):

544

_fields_ = []

545

certificate_credentials_t = ctypes.POINTER(

546

certificate_credentials_st)

547

certificate_type_t = ctypes.c_int

548

549

class datum_t(ctypes.Structure):

550

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

551

('size', ctypes.c_uint)]

552

553

class openpgp_crt_int(ctypes.Structure):

554

_fields_ = []

555

openpgp_crt_t = ctypes.POINTER(openpgp_crt_int)

556

openpgp_crt_fmt_t = ctypes.c_int # gnutls/openpgp.h

557

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

558

credentials_type_t = ctypes.c_int

559

transport_ptr_t = ctypes.c_void_p

560

close_request_t = ctypes.c_int

561

562

# Exceptions

563

class Error(Exception):

564

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

565

# exception might be raised from within GnuTLS.__init__,

566

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

567

# global variable has happened.

568

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

569

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

570

# code is passed, convert it to a string with

571

# gnutls.strerror()

572

self.code = code

573

if message is None and code is not None:

574

message = GnuTLS.strerror(code)

575

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

576

message, *args)

577

578

class CertificateSecurityError(Error):

579

pass

580

581

# Classes

582

class Credentials(object):

583

def __init__(self):

584

self._c_object = gnutls.certificate_credentials_t()

585

gnutls.certificate_allocate_credentials(

586

ctypes.byref(self._c_object))

587

self.type = gnutls.CRD_CERTIFICATE

588

589

def __del__(self):

590

gnutls.certificate_free_credentials(self._c_object)

591

592

class ClientSession(object):

593

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

594

self._c_object = gnutls.session_t()

595

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

596

gnutls.set_default_priority(self._c_object)

597

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

598

gnutls.handshake_set_private_extensions(self._c_object,

599

True)

600

self.socket = socket

601

if credentials is None:

602

credentials = gnutls.Credentials()

603

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

604

ctypes.cast(credentials._c_object,

605

ctypes.c_void_p))

606

self.credentials = credentials

607

608

def __del__(self):

609

gnutls.deinit(self._c_object)

610

611

def handshake(self):

612

return gnutls.handshake(self._c_object)

613

614

def send(self, data):

615

data = bytes(data)

616

data_len = len(data)

617

while data_len > 0:

618

data_len -= gnutls.record_send(self._c_object,

619

data[-data_len:],

620

data_len)

621

622

def bye(self):

623

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

624

625

# Error handling functions

626

def _error_code(result):

627

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

628

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

629

if result >= 0:

630

return result

631

if result == gnutls.E_NO_CERTIFICATE_FOUND:

632

raise gnutls.CertificateSecurityError(code=result)

633

raise gnutls.Error(code=result)

634

635

def _retry_on_error(result, func, arguments):

636

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

637

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

638

while result < 0:

639

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

640

return _error_code(result)

641

result = func(*arguments)

642

return result

643

644

# Unless otherwise indicated, the function declarations below are

645

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

646

647

# Functions

648

priority_set_direct = _library.gnutls_priority_set_direct

649

priority_set_direct.argtypes = [session_t, ctypes.c_char_p,

650

ctypes.POINTER(ctypes.c_char_p)]

651

priority_set_direct.restype = _error_code

652

653

init = _library.gnutls_init

654

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

655

init.restype = _error_code

656

657

set_default_priority = _library.gnutls_set_default_priority

658

set_default_priority.argtypes = [session_t]

659

set_default_priority.restype = _error_code

660

661

record_send = _library.gnutls_record_send

662

record_send.argtypes = [session_t, ctypes.c_void_p,

663

ctypes.c_size_t]

664

record_send.restype = ctypes.c_ssize_t

665

record_send.errcheck = _retry_on_error

666

667

certificate_allocate_credentials = (

668

_library.gnutls_certificate_allocate_credentials)

669

certificate_allocate_credentials.argtypes = [

670

ctypes.POINTER(certificate_credentials_t)]

671

certificate_allocate_credentials.restype = _error_code

672

673

certificate_free_credentials = (

674

_library.gnutls_certificate_free_credentials)

675

certificate_free_credentials.argtypes = [

676

certificate_credentials_t]

677

certificate_free_credentials.restype = None

678

679

handshake_set_private_extensions = (

680

_library.gnutls_handshake_set_private_extensions)

681

handshake_set_private_extensions.argtypes = [session_t,

682

ctypes.c_int]

683

handshake_set_private_extensions.restype = None

684

685

credentials_set = _library.gnutls_credentials_set

686

credentials_set.argtypes = [session_t, credentials_type_t,

687

ctypes.c_void_p]

688

credentials_set.restype = _error_code

689

690

strerror = _library.gnutls_strerror

691

strerror.argtypes = [ctypes.c_int]

692

strerror.restype = ctypes.c_char_p

693

694

certificate_type_get = _library.gnutls_certificate_type_get

695

certificate_type_get.argtypes = [session_t]

696

certificate_type_get.restype = _error_code

697

698

certificate_get_peers = _library.gnutls_certificate_get_peers

699

certificate_get_peers.argtypes = [session_t,

700

ctypes.POINTER(ctypes.c_uint)]

701

certificate_get_peers.restype = ctypes.POINTER(datum_t)

702

703

global_set_log_level = _library.gnutls_global_set_log_level

704

global_set_log_level.argtypes = [ctypes.c_int]

705

global_set_log_level.restype = None

706

707

global_set_log_function = _library.gnutls_global_set_log_function

708

global_set_log_function.argtypes = [log_func]

709

global_set_log_function.restype = None

710

711

deinit = _library.gnutls_deinit

712

deinit.argtypes = [session_t]

713

deinit.restype = None

714

715

handshake = _library.gnutls_handshake

716

handshake.argtypes = [session_t]

717

handshake.restype = _error_code

718

handshake.errcheck = _retry_on_error

719

720

transport_set_ptr = _library.gnutls_transport_set_ptr

721

transport_set_ptr.argtypes = [session_t, transport_ptr_t]

722

transport_set_ptr.restype = None

723

724

bye = _library.gnutls_bye

725

bye.argtypes = [session_t, close_request_t]

726

bye.restype = _error_code

727

bye.errcheck = _retry_on_error

728

729

check_version = _library.gnutls_check_version

730

check_version.argtypes = [ctypes.c_char_p]

731

check_version.restype = ctypes.c_char_p

732

733

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

734

735

openpgp_crt_init = _library.gnutls_openpgp_crt_init

736

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

737

openpgp_crt_init.restype = _error_code

738

739

openpgp_crt_import = _library.gnutls_openpgp_crt_import

740

openpgp_crt_import.argtypes = [openpgp_crt_t,

741

ctypes.POINTER(datum_t),

742

openpgp_crt_fmt_t]

743

openpgp_crt_import.restype = _error_code

744

745

openpgp_crt_verify_self = _library.gnutls_openpgp_crt_verify_self

746

openpgp_crt_verify_self.argtypes = [openpgp_crt_t, ctypes.c_uint,

747

ctypes.POINTER(ctypes.c_uint)]

748

openpgp_crt_verify_self.restype = _error_code

749

750

openpgp_crt_deinit = _library.gnutls_openpgp_crt_deinit

751

openpgp_crt_deinit.argtypes = [openpgp_crt_t]

752

openpgp_crt_deinit.restype = None

753

754

openpgp_crt_get_fingerprint = (

755

_library.gnutls_openpgp_crt_get_fingerprint)

756

openpgp_crt_get_fingerprint.argtypes = [openpgp_crt_t,

757

ctypes.c_void_p,

758

ctypes.POINTER(

759

ctypes.c_size_t)]

760

openpgp_crt_get_fingerprint.restype = _error_code

761

762

# Remove non-public functions

763

del _error_code, _retry_on_error

764

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

765

gnutls = GnuTLS()

766

767

768

def call_pipe(connection, # : multiprocessing.Connection

769

func, *args, **kwargs):

770

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

771

772

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

773

return value on the provided multiprocessing.Connection.

774

"""

775

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

776

connection.close()

408

777

409

778

410

779

class Client(object):

411

780

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

412

781

413

782

Attributes:

414

783

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

415

784

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

417

786

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

418

787

to see if the client lives.

419

788

'None' if no process is running.

420

checker_callback_tag: a gobject event source tag, or None

789

checker_callback_tag: a GLib event source tag, or None

421

790

checker_command: string; External command which is run to check

422

791

if client lives. %() expansions are done at

423

792

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

424

793

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

425

checker_initiator_tag: a gobject event source tag, or None

794

checker_initiator_tag: a GLib event source tag, or None

426

795

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

427

796

client_structure: Object describing what attributes a client has

428

797

and is used for storing the client at exit

429

798

current_checker_command: string; current running checker_command

430

disable_initiator_tag: a gobject event source tag, or None

799

disable_initiator_tag: a GLib event source tag, or None

431

800

enabled: bool()

432

801

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

433

802

uniquely identify the client

438

807

last_checker_status: integer between 0 and 255 reflecting exit

439

808

status of last checker. -1 reflects crashed

440

809

checker, -2 means no checker completed yet.

810

last_checker_signal: The signal which killed the last checker, if

811

last_checker_status is -1

441

812

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

442

813

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

443

814

D-Bus identifiers

450

821

disabled, or None

451

822

server_settings: The server_settings dict from main()

452

823

"""

453

824

454

825

runtime_expansions = ("approval_delay", "approval_duration",

455

826

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

456

827

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

457

828

"last_approval_request", "last_checked_ok",

458

829

"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

830

client_defaults = {

831

"timeout": "PT5M",

832

"extended_timeout": "PT15M",

833

"interval": "PT2M",

834

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

835

"host": "",

836

"approval_delay": "PT0S",

837

"approval_duration": "PT1S",

838

"approved_by_default": "True",

839

"enabled": "True",

840

}

841

485

842

@staticmethod

486

843

def config_parser(config):

487

844

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

494

851

for client_name in config.sections():

495

852

section = dict(config.items(client_name))

496

853

client = settings[client_name] = {}

497

854

498

855

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

499

856

# Reformat values from string types to Python types

500

857

client["approved_by_default"] = config.getboolean(

501

858

client_name, "approved_by_default")

502

859

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

503

860

"enabled")

504

861

862

# Uppercase and remove spaces from fingerprint for later

863

# comparison purposes with return value from the

864

# fingerprint() function

505

865

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

506

866

.replace(" ", ""))

507

867

if "secret" in section:

508

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

868

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

869

.encode("utf-8"),

870

"base64")

509

871

elif "secfile" in section:

510

872

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

511

873

(section["secfile"])),

512

874

"rb") as secfile:

513

875

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

514

876

else:

515

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

877

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

516

878

.format(section))

517

879

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

518

880

client["extended_timeout"] = string_to_delta(

526

888

client["last_approval_request"] = None

527

889

client["last_checked_ok"] = None

528

890

client["last_checker_status"] = -2

529

891

530

892

return settings

531

532

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

893

894

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

533

895

self.name = name

534

896

if server_settings is None:

535

897

server_settings = {}

536

898

self.server_settings = server_settings

537

899

# adding all client settings

538

for setting, value in settings.iteritems():

900

for setting, value in settings.items():

539

901

setattr(self, setting, value)

540

902

541

903

if self.enabled:

542

904

if not hasattr(self, "last_enabled"):

543

905

self.last_enabled = datetime.datetime.utcnow()

547

909

else:

548

910

self.last_enabled = None

549

911

self.expires = None

550

912

551

913

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

914

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

556

915

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

557

916

datetime.datetime.utcnow())

558

917

559

918

# attributes specific for this server instance

560

919

self.checker = None

561

920

self.checker_initiator_tag = None

564

923

self.current_checker_command = None

565

924

self.approved = None

566

925

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()

926

self.changedstate = multiprocessing_manager.Condition(

927

multiprocessing_manager.Lock())

928

self.client_structure = [attr

929

for attr in self.__dict__.keys()

572

930

if not attr.startswith("_")]

573

931

self.client_structure.append("client_structure")

574

575

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

576

lambda obj:

577

isinstance(obj,

578

property)):

932

933

for name, t in inspect.getmembers(

934

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

579

935

if not name.startswith("_"):

580

936

self.client_structure.append(name)

581

937

582

938

# Send notice to process children that client state has changed

583

939

def send_changedstate(self):

584

940

with self.changedstate:

585

941

self.changedstate.notify_all()

586

942

587

943

def enable(self):

588

944

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

589

945

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

594

950

self.last_enabled = datetime.datetime.utcnow()

595

951

self.init_checker()

596

952

self.send_changedstate()

597

953

598

954

def disable(self, quiet=True):

599

955

"""Disable this client."""

600

956

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

602

958

if not quiet:

603

959

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

604

960

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

605

gobject.source_remove(self.disable_initiator_tag)

961

GLib.source_remove(self.disable_initiator_tag)

606

962

self.disable_initiator_tag = None

607

963

self.expires = None

608

964

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

609

gobject.source_remove(self.checker_initiator_tag)

965

GLib.source_remove(self.checker_initiator_tag)

610

966

self.checker_initiator_tag = None

611

967

self.stop_checker()

612

968

self.enabled = False

613

969

if not quiet:

614

970

self.send_changedstate()

615

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

971

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

616

972

return False

617

973

618

974

def __del__(self):

619

975

self.disable()

620

976

621

977

def init_checker(self):

622

978

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

623

979

# and every interval from then on.

624

980

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))

981

GLib.source_remove(self.checker_initiator_tag)

982

self.checker_initiator_tag = GLib.timeout_add(

983

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

984

self.start_checker)

629

985

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

630

986

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))

987

GLib.source_remove(self.disable_initiator_tag)

988

self.disable_initiator_tag = GLib.timeout_add(

989

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

635

990

# Also start a new checker *right now*.

636

991

self.start_checker()

637

638

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

992

993

def checker_callback(self, source, condition, connection,

994

command):

639

995

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

640

996

self.checker_callback_tag = None

641

997

self.checker = None

642

if os.WIFEXITED(condition):

643

self.last_checker_status = os.WEXITSTATUS(condition)

998

# Read return code from connection (see call_pipe)

999

returncode = connection.recv()

1000

connection.close()

1001

1002

if returncode >= 0:

1003

self.last_checker_status = returncode

1004

self.last_checker_signal = None

644

1005

if self.last_checker_status == 0:

645

1006

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

646

1007

vars(self))

647

1008

self.checked_ok()

648

1009

else:

649

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

650

vars(self))

1010

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

651

1011

else:

652

1012

self.last_checker_status = -1

1013

self.last_checker_signal = -returncode

653

1014

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

654

1015

vars(self))

655

1016

return False

1017

656

1018

def checked_ok(self):

657

1019

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

658

1020

self.last_checked_ok = datetime.datetime.utcnow()

659

1021

self.last_checker_status = 0

1022

self.last_checker_signal = None

660

1023

self.bump_timeout()

661

1024

662

1025

def bump_timeout(self, timeout=None):

663

1026

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

664

1027

if timeout is None:

665

1028

timeout = self.timeout

666

1029

if self.disable_initiator_tag is not None:

667

gobject.source_remove(self.disable_initiator_tag)

1030

GLib.source_remove(self.disable_initiator_tag)

668

1031

self.disable_initiator_tag = None

669

1032

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

670

self.disable_initiator_tag = (gobject.timeout_add

671

(timedelta_to_milliseconds

672

(timeout), self.disable))

1033

self.disable_initiator_tag = GLib.timeout_add(

1034

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

673

1035

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

674

1036

675

1037

def need_approval(self):

676

1038

self.last_approval_request = datetime.datetime.utcnow()

677

1039

678

1040

def start_checker(self):

679

1041

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

680

1042

681

1043

If a checker already exists, leave it running and do

682

1044

nothing."""

683

1045

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

688

1050

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

689

1051

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

690

1052

# 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)

1053

1054

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

1055

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

1056

self.checker.join()

1057

self.checker = None

706

1058

# Start a new checker if needed

707

1059

if self.checker is None:

708

1060

# 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)

1061

escaped_attrs = {

1062

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

1063

for attr in self.runtime_expansions}

713

1064

try:

714

1065

command = self.checker_command % escaped_attrs

715

1066

except TypeError as error:

716

1067

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

717

self.checker_command, exc_info=error)

718

return True # Try again later

1068

self.checker_command,

1069

exc_info=error)

1070

return True # Try again later

719

1071

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

1072

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

1073

self.name)

1074

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

1075

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

1076

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

1077

# always replaced by /dev/null.)

1078

# The exception is when not debugging but nevertheless

1079

# running in the foreground; use the previously

1080

# created wnull.

1081

popen_args = {"close_fds": True,

1082

"shell": True,

1083

"cwd": "/"}

1084

if (not self.server_settings["debug"]

1085

and self.server_settings["foreground"]):

1086

popen_args.update({"stdout": wnull,

1087

"stderr": wnull})

1088

pipe = multiprocessing.Pipe(duplex=False)

1089

self.checker = multiprocessing.Process(

1090

target=call_pipe,

1091

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

1092

kwargs=popen_args)

1093

self.checker.start()

1094

self.checker_callback_tag = GLib.io_add_watch(

1095

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

1096

self.checker_callback, pipe[0], command)

1097

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

762

1098

return True

763

1099

764

1100

def stop_checker(self):

765

1101

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

766

1102

if self.checker_callback_tag:

767

gobject.source_remove(self.checker_callback_tag)

1103

GLib.source_remove(self.checker_callback_tag)

768

1104

self.checker_callback_tag = None

769

1105

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

770

1106

return

771

1107

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

1108

self.checker.terminate()

780

1109

self.checker = None

781

1110

782

1111

783

def dbus_service_property(dbus_interface, signature="v",

784

access="readwrite", byte_arrays=False):

1112

def dbus_service_property(dbus_interface,

1113

signature="v",

1114

access="readwrite",

1115

byte_arrays=False):

785

1116

"""Decorators for marking methods of a DBusObjectWithProperties to

786

1117

become properties on the D-Bus.

787

1118

788

1119

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

789

1120

and with one argument by "Set".

790

1121

791

1122

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

792

1123

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

793

1124

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

796

1127

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

797

1128

if byte_arrays and signature != "ay":

798

1129

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

799

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

1130

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

1131

800

1132

def decorator(func):

801

1133

func._dbus_is_property = True

802

1134

func._dbus_interface = dbus_interface

805

1137

func._dbus_name = func.__name__

806

1138

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

807

1139

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

808

func._dbus_get_args_options = {'byte_arrays': byte_arrays }

1140

func._dbus_get_args_options = {'byte_arrays': byte_arrays}

809

1141

return func

1142

810

1143

return decorator

811

1144

812

1145

813

1146

def dbus_interface_annotations(dbus_interface):

814

1147

"""Decorator for marking functions returning interface annotations

815

1148

816

1149

Usage:

817

1150

818

1151

@dbus_interface_annotations("org.example.Interface")

819

1152

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

820

1153

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

821

1154

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

822

1155

"false"}

823

1156

"""

1157

824

1158

def decorator(func):

825

1159

func._dbus_is_interface = True

826

1160

func._dbus_interface = dbus_interface

827

1161

func._dbus_name = dbus_interface

828

1162

return func

1163

829

1164

return decorator

830

1165

831

1166

832

1167

def dbus_annotations(annotations):

833

1168

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

834

1169

Usage:

835

1170

1171

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

1172

"org.freedesktop.DBus.Property."

1173

"EmitsChangedSignal": "false"})

836

1174

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

837

1175

access="r")

838

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

839

"org.freedesktop.DBus.Property."

840

"EmitsChangedSignal": "false"})

841

1176

def Property_dbus_property(self):

842

1177

return dbus.Boolean(False)

1178

1179

See also the DBusObjectWithAnnotations class.

843

1180

"""

1181

844

1182

def decorator(func):

845

1183

func._dbus_annotations = annotations

846

1184

return func

1185

847

1186

return decorator

848

1187

849

1188

850

1189

class DBusPropertyException(dbus.exceptions.DBusException):

851

1190

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

852

1191

"""

853

def __unicode__(self):

854

return unicode(str(self))

1192

pass

855

1193

856

1194

857

1195

class DBusPropertyAccessException(DBusPropertyException):

866

1204

pass

867

1205

868

1206

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.

1207

class DBusObjectWithAnnotations(dbus.service.Object):

1208

"""A D-Bus object with annotations.

1209

1210

Classes inheriting from this can use the dbus_annotations

1211

decorator to add annotations to methods or signals.

875

1212

"""

876

1213

877

1214

@staticmethod

878

1215

def _is_dbus_thing(thing):

879

1216

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

880

1217

881

1218

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

882

1219

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

883

1220

"""

884

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

1221

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

885

1222

False)

886

1223

887

1224

def _get_all_dbus_things(self, thing):

888

1225

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

889

1226

"""

890

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

891

name),

1227

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

892

1228

athing.__get__(self))

893

1229

for cls in self.__class__.__mro__

894

1230

for name, athing in

895

inspect.getmembers(cls,

896

self._is_dbus_thing(thing)))

897

1231

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

1232

1233

@dbus.service.method(dbus.INTROSPECTABLE_IFACE,

1234

out_signature="s",

1235

path_keyword='object_path',

1236

connection_keyword='connection')

1237

def Introspect(self, object_path, connection):

1238

"""Overloading of standard D-Bus method.

1239

1240

Inserts annotation tags on methods and signals.

1241

"""

1242

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

1243

connection)

1244

try:

1245

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

1246

1247

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

1248

# Add annotation tags

1249

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

1250

for tag in if_tag.getElementsByTagName(typ):

1251

annots = dict()

1252

for name, prop in (self.

1253

_get_all_dbus_things(typ)):

1254

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

1255

and prop._dbus_interface

1256

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

1257

annots.update(getattr(

1258

prop, "_dbus_annotations", {}))

1259

for name, value in annots.items():

1260

ann_tag = document.createElement(

1261

"annotation")

1262

ann_tag.setAttribute("name", name)

1263

ann_tag.setAttribute("value", value)

1264

tag.appendChild(ann_tag)

1265

# Add interface annotation tags

1266

for annotation, value in dict(

1267

itertools.chain.from_iterable(

1268

annotations().items()

1269

for name, annotations

1270

in self._get_all_dbus_things("interface")

1271

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

1272

)).items():

1273

ann_tag = document.createElement("annotation")

1274

ann_tag.setAttribute("name", annotation)

1275

ann_tag.setAttribute("value", value)

1276

if_tag.appendChild(ann_tag)

1277

# Fix argument name for the Introspect method itself

1278

if (if_tag.getAttribute("name")

1279

== dbus.INTROSPECTABLE_IFACE):

1280

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

1281

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

1282

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

1283

if (arg.getAttribute("direction")

1284

== "out"):

1285

arg.setAttribute("name",

1286

"xml_data")

1287

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

1288

document.unlink()

1289

except (AttributeError, xml.dom.DOMException,

1290

xml.parsers.expat.ExpatError) as error:

1291

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

1292

exc_info=error)

1293

return xmlstring

1294

1295

1296

class DBusObjectWithProperties(DBusObjectWithAnnotations):

1297

"""A D-Bus object with properties.

1298

1299

Classes inheriting from this can use the dbus_service_property

1300

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

1301

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

1302

"""

1303

898

1304

def _get_dbus_property(self, interface_name, property_name):

899

1305

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

900

1306

property with the specified name and interface.

901

1307

"""

902

for cls in self.__class__.__mro__:

903

for name, value in (inspect.getmembers

904

(cls,

905

self._is_dbus_thing("property"))):

1308

for cls in self.__class__.__mro__:

1309

for name, value in inspect.getmembers(

1310

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

906

1311

if (value._dbus_name == property_name

907

1312

and value._dbus_interface == interface_name):

908

1313

return value.__get__(self)

909

1314

910

1315

# 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",

1316

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

1317

self.dbus_object_path, interface_name, property_name))

1318

1319

@classmethod

1320

def _get_all_interface_names(cls):

1321

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

1322

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

1323

"_dbus_interface", None)

1324

for x in (inspect.getmro(cls))

1325

for attr in dir(x))

1326

if name is not None)

1327

1328

@dbus.service.method(dbus.PROPERTIES_IFACE,

1329

in_signature="ss",

916

1330

out_signature="v")

917

1331

def Get(self, interface_name, property_name):

918

1332

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

924

1338

if not hasattr(value, "variant_level"):

925

1339

return value

926

1340

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

927

1341

928

1342

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

929

1343

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

930

1344

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

937

1351

# signatures other than "ay".

938

1352

if prop._dbus_signature != "ay":

939

1353

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

940

"'ay' signature {0!r}"

1354

"'ay' signature {!r}"

941

1355

.format(prop._dbus_signature))

942

1356

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

943

1357

for byte in value))

944

1358

prop(value)

945

946

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

1359

1360

@dbus.service.method(dbus.PROPERTIES_IFACE,

1361

in_signature="s",

947

1362

out_signature="a{sv}")

948

1363

def GetAll(self, interface_name):

949

1364

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

950

1365

standard.

951

1366

952

1367

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

953

1368

"""

954

1369

properties = {}

964

1379

if not hasattr(value, "variant_level"):

965

1380

properties[name] = value

966

1381

continue

967

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

968

value.variant_level+1)

1382

properties[name] = type(value)(

1383

value, variant_level=value.variant_level + 1)

969

1384

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

970

1385

1386

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

1387

def PropertiesChanged(self, interface_name, changed_properties,

1388

invalidated_properties):

1389

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

1390

standard.

1391

"""

1392

pass

1393

971

1394

@dbus.service.method(dbus.INTROSPECTABLE_IFACE,

972

1395

out_signature="s",

973

1396

path_keyword='object_path',

974

1397

connection_keyword='connection')

975

1398

def Introspect(self, object_path, connection):

976

1399

"""Overloading of standard D-Bus method.

977

1400

978

1401

Inserts property tags and interface annotation tags.

979

1402

"""

980

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

981

connection)

1403

xmlstring = DBusObjectWithAnnotations.Introspect(self,

1404

object_path,

1405

connection)

982

1406

try:

983

1407

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

1408

984

1409

def make_tag(document, name, prop):

985

1410

e = document.createElement("property")

986

1411

e.setAttribute("name", name)

987

1412

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

988

1413

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

989

1414

return e

1415

990

1416

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

991

1417

# Add property tags

992

1418

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

995

1421

if prop._dbus_interface

996

1422

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

997

1423

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)

1424

# Add annotation tags for properties

1425

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

1426

annots = dict()

1427

for name, prop in self._get_all_dbus_things(

1428

"property"):

1429

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

1430

and prop._dbus_interface

1431

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

1432

annots.update(getattr(

1433

prop, "_dbus_annotations", {}))

1434

for name, value in annots.items():

1435

ann_tag = document.createElement(

1436

"annotation")

1437

ann_tag.setAttribute("name", name)

1438

ann_tag.setAttribute("value", value)

1439

tag.appendChild(ann_tag)

1029

1440

# Add the names to the return values for the

1030

1441

# "org.freedesktop.DBus.Properties" methods

1031

1442

if (if_tag.getAttribute("name")

1050

1461

return xmlstring

1051

1462

1052

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

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

old_checker = self.checker

1356

if self.checker is not None:

1357

old_checker_pid = self.checker.pid

1358

else:

1359

old_checker_pid = None

1854

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

1360

1855

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

1361

1856

# Only if new checker process was started

1362

1857

if (self.checker is not None

1364

1859

# Emit D-Bus signal

1365

1860

self.CheckerStarted(self.current_checker_command)

1366

1861

return r

1367

1862

1368

1863

def _reset_approved(self):

1369

1864

self.approved = None

1370

1865

return False

1371

1866

1372

1867

def approve(self, value=True):

1373

1868

self.approved = value

1374

gobject.timeout_add(timedelta_to_milliseconds

1375

(self.approval_duration),

1376

self._reset_approved)

1869

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

1870

* 1000), self._reset_approved)

1377

1871

self.send_changedstate()

1378

1379

## D-Bus methods, signals & properties

1380

_interface = "se.recompile.Mandos.Client"

1381

1382

## Interfaces

1383

1384

@dbus_interface_annotations(_interface)

1385

def _foo(self):

1386

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

1387

"false"}

1388

1389

## Signals

1390

1872

1873

# D-Bus methods, signals & properties

1874

1875

# Interfaces

1876

1877

# Signals

1878

1391

1879

# CheckerCompleted - signal

1392

1880

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

1393

1881

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

1394

1882

"D-Bus signal"

1395

1883

pass

1396

1884

1397

1885

# CheckerStarted - signal

1398

1886

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

1399

1887

def CheckerStarted(self, command):

1400

1888

"D-Bus signal"

1401

1889

pass

1402

1890

1403

1891

# PropertyChanged - signal

1892

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

1404

1893

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

1405

1894

def PropertyChanged(self, property, value):

1406

1895

"D-Bus signal"

1407

1896

pass

1408

1897

1409

1898

# GotSecret - signal

1410

1899

@dbus.service.signal(_interface)

1411

1900

def GotSecret(self):

1414

1903

server to mandos-client

1415

1904

"""

1416

1905

pass

1417

1906

1418

1907

# Rejected - signal

1419

1908

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

1420

1909

def Rejected(self, reason):

1421

1910

"D-Bus signal"

1422

1911

pass

1423

1912

1424

1913

# NeedApproval - signal

1425

1914

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

1426

1915

def NeedApproval(self, timeout, default):

1427

1916

"D-Bus signal"

1428

1917

return self.need_approval()

1429

1430

## Methods

1431

1918

1919

# Methods

1920

1432

1921

# Approve - method

1433

1922

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

1434

1923

def Approve(self, value):

1435

1924

self.approve(value)

1436

1925

1437

1926

# CheckedOK - method

1438

1927

@dbus.service.method(_interface)

1439

1928

def CheckedOK(self):

1440

1929

self.checked_ok()

1441

1930

1442

1931

# Enable - method

1932

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

1443

1933

@dbus.service.method(_interface)

1444

1934

def Enable(self):

1445

1935

"D-Bus method"

1446

1936

self.enable()

1447

1937

1448

1938

# StartChecker - method

1939

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

1449

1940

@dbus.service.method(_interface)

1450

1941

def StartChecker(self):

1451

1942

"D-Bus method"

1452

1943

self.start_checker()

1453

1944

1454

1945

# Disable - method

1946

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

1455

1947

@dbus.service.method(_interface)

1456

1948

def Disable(self):

1457

1949

"D-Bus method"

1458

1950

self.disable()

1459

1951

1460

1952

# StopChecker - method

1953

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

1461

1954

@dbus.service.method(_interface)

1462

1955

def StopChecker(self):

1463

1956

self.stop_checker()

1464

1465

## Properties

1466

1957

1958

# Properties

1959

1467

1960

# ApprovalPending - property

1468

1961

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

1469

1962

def ApprovalPending_dbus_property(self):

1470

1963

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

1471

1964

1472

1965

# ApprovedByDefault - property

1473

@dbus_service_property(_interface, signature="b",

1966

@dbus_service_property(_interface,

1967

signature="b",

1474

1968

access="readwrite")

1475

1969

def ApprovedByDefault_dbus_property(self, value=None):

1476

1970

if value is None: # get

1477

1971

return dbus.Boolean(self.approved_by_default)

1478

1972

self.approved_by_default = bool(value)

1479

1973

1480

1974

# ApprovalDelay - property

1481

@dbus_service_property(_interface, signature="t",

1975

@dbus_service_property(_interface,

1976

signature="t",

1482

1977

access="readwrite")

1483

1978

def ApprovalDelay_dbus_property(self, value=None):

1484

1979

if value is None: # get

1485

return dbus.UInt64(self.approval_delay_milliseconds())

1980

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

1981

* 1000)

1486

1982

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

1487

1983

1488

1984

# ApprovalDuration - property

1489

@dbus_service_property(_interface, signature="t",

1985

@dbus_service_property(_interface,

1986

signature="t",

1490

1987

access="readwrite")

1491

1988

def ApprovalDuration_dbus_property(self, value=None):

1492

1989

if value is None: # get

1493

return dbus.UInt64(timedelta_to_milliseconds(

1494

self.approval_duration))

1990

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

1991

* 1000)

1495

1992

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

1496

1993

1497

1994

# Name - property

1995

@dbus_annotations(

1996

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

1498

1997

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

1499

1998

def Name_dbus_property(self):

1500

1999

return dbus.String(self.name)

1501

2000

1502

2001

# Fingerprint - property

2002

@dbus_annotations(

2003

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

1503

2004

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

1504

2005

def Fingerprint_dbus_property(self):

1505

2006

return dbus.String(self.fingerprint)

1506

2007

1507

2008

# Host - property

1508

@dbus_service_property(_interface, signature="s",

2009

@dbus_service_property(_interface,

2010

signature="s",

1509

2011

access="readwrite")

1510

2012

def Host_dbus_property(self, value=None):

1511

2013

if value is None: # get

1512

2014

return dbus.String(self.host)

1513

self.host = unicode(value)

1514

2015

self.host = str(value)

2016

1515

2017

# Created - property

2018

@dbus_annotations(

2019

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

1516

2020

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

1517

2021

def Created_dbus_property(self):

1518

2022

return datetime_to_dbus(self.created)

1519

2023

1520

2024

# LastEnabled - property

1521

2025

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

1522

2026

def LastEnabled_dbus_property(self):

1523

2027

return datetime_to_dbus(self.last_enabled)

1524

2028

1525

2029

# Enabled - property

1526

@dbus_service_property(_interface, signature="b",

2030

@dbus_service_property(_interface,

2031

signature="b",

1527

2032

access="readwrite")

1528

2033

def Enabled_dbus_property(self, value=None):

1529

2034

if value is None: # get

1532

2037

self.enable()

1533

2038

else:

1534

2039

self.disable()

1535

2040

1536

2041

# LastCheckedOK - property

1537

@dbus_service_property(_interface, signature="s",

2042

@dbus_service_property(_interface,

2043

signature="s",

1538

2044

access="readwrite")

1539

2045

def LastCheckedOK_dbus_property(self, value=None):

1540

2046

if value is not None:

1541

2047

self.checked_ok()

1542

2048

return

1543

2049

return datetime_to_dbus(self.last_checked_ok)

1544

2050

1545

2051

# LastCheckerStatus - property

1546

@dbus_service_property(_interface, signature="n",

1547

access="read")

2052

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

1548

2053

def LastCheckerStatus_dbus_property(self):

1549

2054

return dbus.Int16(self.last_checker_status)

1550

2055

1551

2056

# Expires - property

1552

2057

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

1553

2058

def Expires_dbus_property(self):

1554

2059

return datetime_to_dbus(self.expires)

1555

2060

1556

2061

# LastApprovalRequest - property

1557

2062

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

1558

2063

def LastApprovalRequest_dbus_property(self):

1559

2064

return datetime_to_dbus(self.last_approval_request)

1560

2065

1561

2066

# Timeout - property

1562

@dbus_service_property(_interface, signature="t",

2067

@dbus_service_property(_interface,

2068

signature="t",

1563

2069

access="readwrite")

1564

2070

def Timeout_dbus_property(self, value=None):

1565

2071

if value is None: # get

1566

return dbus.UInt64(self.timeout_milliseconds())

2072

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

1567

2073

old_timeout = self.timeout

1568

2074

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

1569

2075

# Reschedule disabling

1577

2083

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

1578

2084

is None):

1579

2085

return

1580

gobject.source_remove(self.disable_initiator_tag)

1581

self.disable_initiator_tag = (

1582

gobject.timeout_add(

1583

timedelta_to_milliseconds(self.expires - now),

1584

self.disable))

1585

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

1586

2091

# ExtendedTimeout - property

1587

@dbus_service_property(_interface, signature="t",

2092

@dbus_service_property(_interface,

2093

signature="t",

1588

2094

access="readwrite")

1589

2095

def ExtendedTimeout_dbus_property(self, value=None):

1590

2096

if value is None: # get

1591

return dbus.UInt64(self.extended_timeout_milliseconds())

2097

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

2098

* 1000)

1592

2099

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

1593

2100

1594

2101

# Interval - property

1595

@dbus_service_property(_interface, signature="t",

2102

@dbus_service_property(_interface,

2103

signature="t",

1596

2104

access="readwrite")

1597

2105

def Interval_dbus_property(self, value=None):

1598

2106

if value is None: # get

1599

return dbus.UInt64(self.interval_milliseconds())

2107

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

1600

2108

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

1601

2109

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

1602

2110

return

1603

2111

if self.enabled:

1604

2112

# Reschedule checker run

1605

gobject.source_remove(self.checker_initiator_tag)

1606

self.checker_initiator_tag = (gobject.timeout_add

1607

(value, self.start_checker))

1608

self.start_checker() # Start one now, too

1609

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

1610

2118

# Checker - property

1611

@dbus_service_property(_interface, signature="s",

2119

@dbus_service_property(_interface,

2120

signature="s",

1612

2121

access="readwrite")

1613

2122

def Checker_dbus_property(self, value=None):

1614

2123

if value is None: # get

1615

2124

return dbus.String(self.checker_command)

1616

self.checker_command = unicode(value)

1617

2125

self.checker_command = str(value)

2126

1618

2127

# CheckerRunning - property

1619

@dbus_service_property(_interface, signature="b",

2128

@dbus_service_property(_interface,

2129

signature="b",

1620

2130

access="readwrite")

1621

2131

def CheckerRunning_dbus_property(self, value=None):

1622

2132

if value is None: # get

1625

2135

self.start_checker()

1626

2136

else:

1627

2137

self.stop_checker()

1628

2138

1629

2139

# ObjectPath - property

2140

@dbus_annotations(

2141

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

2142

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

1630

2143

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

1631

2144

def ObjectPath_dbus_property(self):

1632

return self.dbus_object_path # is already a dbus.ObjectPath

1633

2145

return self.dbus_object_path # is already a dbus.ObjectPath

2146

1634

2147

# Secret = property

1635

@dbus_service_property(_interface, signature="ay",

1636

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)

1637

2155

def Secret_dbus_property(self, value):

1638

self.secret = str(value)

1639

2156

self.secret = bytes(value)

2157

1640

2158

del _interface

1641

2159

1642

2160

1645

2163

self._pipe = child_pipe

1646

2164

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

1647

2165

if not self._pipe.recv():

1648

raise KeyError()

1649

2166

raise KeyError(fpr)

2167

1650

2168

def __getattribute__(self, name):

1651

2169

if name == '_pipe':

1652

2170

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

1655

2173

if data[0] == 'data':

1656

2174

return data[1]

1657

2175

if data[0] == 'function':

2176

1658

2177

def func(*args, **kwargs):

1659

2178

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

1660

2179

return self._pipe.recv()[1]

2180

1661

2181

return func

1662

2182

1663

2183

def __setattr__(self, name, value):

1664

2184

if name == '_pipe':

1665

2185

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

1668

2188

1669

2189

class ClientHandler(socketserver.BaseRequestHandler, object):

1670

2190

"""A class to handle client connections.

1671

2191

1672

2192

Instantiated once for each connection to handle it.

1673

2193

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

1674

2194

1675

2195

def handle(self):

1676

2196

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

1677

2197

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

1678

unicode(self.client_address))

2198

str(self.client_address))

1679

2199

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

1680

2200

self.server.child_pipe.fileno())

1681

1682

session = (gnutls.connection

1683

.ClientSession(self.request,

1684

gnutls.connection

1685

.X509Credentials()))

1686

1687

# Note: gnutls.connection.X509Credentials is really a

1688

# generic GnuTLS certificate credentials object so long as

1689

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

1690

# here despite using OpenPGP certificates.

1691

1692

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

1693

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

1694

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

1695

# "+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"))

1696

2208

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

1697

2209

priority = self.server.gnutls_priority

1698

2210

if priority is None:

1699

2211

priority = "NORMAL"

1700

(gnutls.library.functions

1701

.gnutls_priority_set_direct(session._c_object,

1702

priority, None))

1703

2212

gnutls.priority_set_direct(session._c_object,

2213

priority.encode("utf-8"),

2214

None)

2215

1704

2216

# Start communication using the Mandos protocol

1705

2217

# Get protocol number

1706

2218

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

1711

2223

except (ValueError, IndexError, RuntimeError) as error:

1712

2224

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

1713

2225

return

1714

2226

1715

2227

# Start GnuTLS connection

1716

2228

try:

1717

2229

session.handshake()

1718

except gnutls.errors.GNUTLSError as error:

2230

except gnutls.Error as error:

1719

2231

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

1720

2232

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

1721

2233

# established. Just abandon the request.

1722

2234

return

1723

2235

logger.debug("Handshake succeeded")

1724

2236

1725

2237

approval_required = False

1726

2238

try:

1727

2239

try:

1728

fpr = self.fingerprint(self.peer_certificate

1729

(session))

1730

except (TypeError,

1731

gnutls.errors.GNUTLSError) as error:

2240

fpr = self.fingerprint(

2241

self.peer_certificate(session))

2242

except (TypeError, gnutls.Error) as error:

1732

2243

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

1733

2244

return

1734

2245

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

1735

2246

1736

2247

try:

1737

2248

client = ProxyClient(child_pipe, fpr,

1738

2249

self.client_address)

1739

2250

except KeyError:

1740

2251

return

1741

2252

1742

2253

if client.approval_delay:

1743

2254

delay = client.approval_delay

1744

2255

client.approvals_pending += 1

1745

2256

approval_required = True

1746

2257

1747

2258

while True:

1748

2259

if not client.enabled:

1749

2260

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

1750

client.name)

2261

client.name)

1751

2262

if self.server.use_dbus:

1752

2263

# Emit D-Bus signal

1753

2264

client.Rejected("Disabled")

1754

2265

return

1755

2266

1756

2267

if client.approved or not client.approval_delay:

1757

#We are approved or approval is disabled

2268

# We are approved or approval is disabled

1758

2269

break

1759

2270

elif client.approved is None:

1760

2271

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

1762

2273

if self.server.use_dbus:

1763

2274

# Emit D-Bus signal

1764

2275

client.NeedApproval(

1765

client.approval_delay_milliseconds(),

1766

client.approved_by_default)

2276

client.approval_delay.total_seconds()

2277

* 1000, client.approved_by_default)

1767

2278

else:

1768

2279

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

1769

2280

client.name)

1771

2282

# Emit D-Bus signal

1772

2283

client.Rejected("Denied")

1773

2284

return

1774

1775

#wait until timeout or approved

2285

2286

# wait until timeout or approved

1776

2287

time = datetime.datetime.now()

1777

2288

client.changedstate.acquire()

1778

client.changedstate.wait(

1779

float(timedelta_to_milliseconds(delay)

1780

/ 1000))

2289

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

1781

2290

client.changedstate.release()

1782

2291

time2 = datetime.datetime.now()

1783

2292

if (time2 - time) >= delay:

1793

2302

break

1794

2303

else:

1795

2304

delay -= time2 - time

1796

1797

sent_size = 0

1798

while sent_size < len(client.secret):

1799

try:

1800

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

1801

except gnutls.errors.GNUTLSError as error:

1802

logger.warning("gnutls send failed",

1803

exc_info=error)

1804

return

1805

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

1806

sent, len(client.secret)

1807

- (sent_size + sent))

1808

sent_size += sent

1809

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

1810

2313

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

1811

2314

# bump the timeout using extended_timeout

1812

2315

client.bump_timeout(client.extended_timeout)

1813

2316

if self.server.use_dbus:

1814

2317

# Emit D-Bus signal

1815

2318

client.GotSecret()

1816

2319

1817

2320

finally:

1818

2321

if approval_required:

1819

2322

client.approvals_pending -= 1

1820

2323

try:

1821

2324

session.bye()

1822

except gnutls.errors.GNUTLSError as error:

2325

except gnutls.Error as error:

1823

2326

logger.warning("GnuTLS bye failed",

1824

2327

exc_info=error)

1825

2328

1826

2329

@staticmethod

1827

2330

def peer_certificate(session):

1828

2331

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

1829

2332

# If not an OpenPGP certificate...

1830

if (gnutls.library.functions

1831

.gnutls_certificate_type_get(session._c_object)

1832

!= gnutls.library.constants.GNUTLS_CRT_OPENPGP):

1833

# ...do the normal thing

1834

return session.peer_certificate

2333

if (gnutls.certificate_type_get(session._c_object)

2334

!= gnutls.CRT_OPENPGP):

2335

# ...return invalid data

2336

return b""

1835

2337

list_size = ctypes.c_uint(1)

1836

cert_list = (gnutls.library.functions

1837

.gnutls_certificate_get_peers

2338

cert_list = (gnutls.certificate_get_peers

1838

2339

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

1839

2340

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

1840

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

1841

" certificate")

2341

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

1842

2342

if list_size.value == 0:

1843

2343

return None

1844

2344

cert = cert_list[0]

1845

2345

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

1846

2346

1847

2347

@staticmethod

1848

2348

def fingerprint(openpgp):

1849

2349

"Convert an OpenPGP bytestring to a hexdigit fingerprint"

1850

2350

# New GnuTLS "datum" with the OpenPGP public key

1851

datum = (gnutls.library.types

1852

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

1853

ctypes.POINTER

1854

(ctypes.c_ubyte)),

1855

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)))

1856

2355

# New empty GnuTLS certificate

1857

crt = gnutls.library.types.gnutls_openpgp_crt_t()

1858

(gnutls.library.functions

1859

.gnutls_openpgp_crt_init(ctypes.byref(crt)))

2356

crt = gnutls.openpgp_crt_t()

2357

gnutls.openpgp_crt_init(ctypes.byref(crt))

1860

2358

# Import the OpenPGP public key into the certificate

1861

(gnutls.library.functions

1862

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

1863

gnutls.library.constants

1864

.GNUTLS_OPENPGP_FMT_RAW))

2359

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

2360

gnutls.OPENPGP_FMT_RAW)

1865

2361

# Verify the self signature in the key

1866

2362

crtverify = ctypes.c_uint()

1867

(gnutls.library.functions

1868

.gnutls_openpgp_crt_verify_self(crt, 0,

1869

ctypes.byref(crtverify)))

2363

gnutls.openpgp_crt_verify_self(crt, 0,

2364

ctypes.byref(crtverify))

1870

2365

if crtverify.value != 0:

1871

gnutls.library.functions.gnutls_openpgp_crt_deinit(crt)

1872

raise (gnutls.errors.CertificateSecurityError

1873

("Verify failed"))

2366

gnutls.openpgp_crt_deinit(crt)

2367

raise gnutls.CertificateSecurityError("Verify failed")

1874

2368

# New buffer for the fingerprint

1875

2369

buf = ctypes.create_string_buffer(20)

1876

2370

buf_len = ctypes.c_size_t()

1877

2371

# Get the fingerprint from the certificate into the buffer

1878

(gnutls.library.functions

1879

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

1880

ctypes.byref(buf_len)))

2372

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

2373

ctypes.byref(buf_len))

1881

2374

# Deinit the certificate

1882

gnutls.library.functions.gnutls_openpgp_crt_deinit(crt)

2375

gnutls.openpgp_crt_deinit(crt)

1883

2376

# Convert the buffer to a Python bytestring

1884

2377

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

1885

2378

# Convert the bytestring to hexadecimal notation

1889

2382

1890

2383

class MultiprocessingMixIn(object):

1891

2384

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

2385

1892

2386

def sub_process_main(self, request, address):

1893

2387

try:

1894

2388

self.finish_request(request, address)

1895

2389

except Exception:

1896

2390

self.handle_error(request, address)

1897

2391

self.close_request(request)

1898

2392

1899

2393

def process_request(self, request, address):

1900

2394

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

1901

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

1902

args = (request, address))

2395

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

2396

args=(request, address))

1903

2397

proc.start()

1904

2398

return proc

1905

2399

1906

2400

1907

2401

class MultiprocessingMixInWithPipe(MultiprocessingMixIn, object):

1908

2402

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

2403

1909

2404

def process_request(self, request, client_address):

1910

2405

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

1911

2406

1912

2407

This function creates a new pipe in self.pipe

1913

2408

"""

1914

2409

parent_pipe, self.child_pipe = multiprocessing.Pipe()

1915

2410

1916

2411

proc = MultiprocessingMixIn.process_request(self, request,

1917

2412

client_address)

1918

2413

self.child_pipe.close()

1919

2414

self.add_pipe(parent_pipe, proc)

1920

2415

1921

2416

def add_pipe(self, parent_pipe, proc):

1922

2417

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

1923

2418

raise NotImplementedError()

1926

2421

class IPv6_TCPServer(MultiprocessingMixInWithPipe,

1927

2422

socketserver.TCPServer, object):

1928

2423

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

1929

2424

1930

2425

Attributes:

1931

2426

enabled: Boolean; whether this server is activated yet

1932

2427

interface: None or a network interface name (string)

1933

2428

use_ipv6: Boolean; to use IPv6 or not

1934

2429

"""

2430

1935

2431

def __init__(self, server_address, RequestHandlerClass,

1936

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

2432

interface=None,

2433

use_ipv6=True,

2434

socketfd=None):

1937

2435

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

1938

2436

creating a new one with socket.socket().

1939

2437

"""

1945

2443

self.socketfd = socketfd

1946

2444

# Save the original socket.socket() function

1947

2445

self.socket_socket = socket.socket

2446

1948

2447

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

1949

#

2448

#

1950

2449

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

1951

2450

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

1952

2451

# patching socket.socket.)

1953

#

2452

#

1954

2453

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

1955

2454

@functools.wraps(socket.socket)

1956

2455

def socket_wrapper(*args, **kwargs):

1968

2467

# socket_wrapper(), if socketfd was set.

1969

2468

socketserver.TCPServer.__init__(self, server_address,

1970

2469

RequestHandlerClass)

1971

2470

1972

2471

def server_bind(self):

1973

2472

"""This overrides the normal server_bind() function

1974

2473

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

1975

2474

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

2475

global SO_BINDTODEVICE

1976

2476

if self.interface is not None:

1977

2477

if SO_BINDTODEVICE is None:

1978

logger.error("SO_BINDTODEVICE does not exist;"

1979

" cannot bind to interface %s",

1980

self.interface)

1981

else:

1982

try:

1983

self.socket.setsockopt(socket.SOL_SOCKET,

1984

SO_BINDTODEVICE,

1985

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

1986

except socket.error as error:

1987

if error.errno == errno.EPERM:

1988

logger.error("No permission to bind to"

1989

" interface %s", self.interface)

1990

elif error.errno == errno.ENOPROTOOPT:

1991

logger.error("SO_BINDTODEVICE not available;"

1992

" cannot bind to interface %s",

1993

self.interface)

1994

elif error.errno == errno.ENODEV:

1995

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

1996

" cannot bind", self.interface)

1997

else:

1998

raise

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

1999

2499

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

2000

2500

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

2001

2501

if not self.server_address[0]:

2002

2502

if self.address_family == socket.AF_INET6:

2003

any_address = "::" # in6addr_any

2503

any_address = "::" # in6addr_any

2004

2504

else:

2005

any_address = "0.0.0.0" # INADDR_ANY

2505

any_address = "0.0.0.0" # INADDR_ANY

2006

2506

self.server_address = (any_address,

2007

2507

self.server_address[1])

2008

2508

elif not self.server_address[1]:

2009

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

2010

0)

2509

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

2011

2510

# if self.interface:

2012

2511

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

2013

2512

# 0, # port

2019

2518

2020

2519

class MandosServer(IPv6_TCPServer):

2021

2520

"""Mandos server.

2022

2521

2023

2522

Attributes:

2024

2523

clients: set of Client objects

2025

2524

gnutls_priority GnuTLS priority string

2026

2525

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

2027

2028

Assumes a gobject.MainLoop event loop.

2526

2527

Assumes a GLib.MainLoop event loop.

2029

2528

"""

2529

2030

2530

def __init__(self, server_address, RequestHandlerClass,

2031

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

2032

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):

2033

2537

self.enabled = False

2034

2538

self.clients = clients

2035

2539

if self.clients is None:

2038

2542

self.gnutls_priority = gnutls_priority

2039

2543

IPv6_TCPServer.__init__(self, server_address,

2040

2544

RequestHandlerClass,

2041

interface = interface,

2042

use_ipv6 = use_ipv6,

2043

socketfd = socketfd)

2545

interface=interface,

2546

use_ipv6=use_ipv6,

2547

socketfd=socketfd)

2548

2044

2549

def server_activate(self):

2045

2550

if self.enabled:

2046

2551

return socketserver.TCPServer.server_activate(self)

2047

2552

2048

2553

def enable(self):

2049

2554

self.enabled = True

2050

2555

2051

2556

def add_pipe(self, parent_pipe, proc):

2052

2557

# Call "handle_ipc" for both data and EOF events

2053

gobject.io_add_watch(parent_pipe.fileno(),

2054

gobject.IO_IN | gobject.IO_HUP,

2055

functools.partial(self.handle_ipc,

2056

parent_pipe =

2057

parent_pipe,

2058

proc = proc))

2059

2060

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

2061

proc = None, client_object=None):

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):

2062

2569

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

2063

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

2570

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

2064

2571

# Wait for other process to exit

2065

2572

proc.join()

2066

2573

return False

2067

2574

2068

2575

# Read a request from the child

2069

2576

request = parent_pipe.recv()

2070

2577

command = request[0]

2071

2578

2072

2579

if command == 'init':

2073

2580

fpr = request[1]

2074

2581

address = request[2]

2075

2076

for c in self.clients.itervalues():

2582

2583

for c in self.clients.values():

2077

2584

if c.fingerprint == fpr:

2078

2585

client = c

2079

2586

break

2086

2593

address[0])

2087

2594

parent_pipe.send(False)

2088

2595

return False

2089

2090

gobject.io_add_watch(parent_pipe.fileno(),

2091

gobject.IO_IN | gobject.IO_HUP,

2092

functools.partial(self.handle_ipc,

2093

parent_pipe =

2094

parent_pipe,

2095

proc = proc,

2096

client_object =

2097

client))

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))

2098

2604

parent_pipe.send(True)

2099

2605

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

2100

2606

# same fileno

2103

2609

funcname = request[1]

2104

2610

args = request[2]

2105

2611

kwargs = request[3]

2106

2612

2107

2613

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

2108

2614

funcname)(*args,

2109

**kwargs)))

2110

2615

**kwargs)))

2616

2111

2617

if command == 'getattr':

2112

2618

attrname = request[1]

2113

if callable(client_object.__getattribute__(attrname)):

2114

parent_pipe.send(('function',))

2619

if isinstance(client_object.__getattribute__(attrname),

2620

collections.Callable):

2621

parent_pipe.send(('function', ))

2115

2622

else:

2116

parent_pipe.send(('data', client_object

2117

.__getattribute__(attrname)))

2118

2623

parent_pipe.send((

2624

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

2625

2119

2626

if command == 'setattr':

2120

2627

attrname = request[1]

2121

2628

value = request[2]

2122

2629

setattr(client_object, attrname, value)

2123

2630

2124

2631

return True

2125

2632

2126

2633

2127

2634

def rfc3339_duration_to_delta(duration):

2128

2635

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

2129

2636

2130

2637

>>> rfc3339_duration_to_delta("P7D")

2131

2638

datetime.timedelta(7)

2132

2639

>>> rfc3339_duration_to_delta("PT60S")

2142

2649

>>> rfc3339_duration_to_delta("P1DT3M20S")

2143

2650

datetime.timedelta(1, 200)

2144

2651

"""

2145

2652

2146

2653

# Parsing an RFC 3339 duration with regular expressions is not

2147

2654

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

2148

2655

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

2149

2656

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

2150

2657

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

2151

2658

# avoid excessive use of external libraries.

2152

2659

2153

2660

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

2154

Token = collections.namedtuple("Token",

2155

("regexp", # To match token; if

2156

# "value" is not None,

2157

# must have a "group"

2158

# containing digits

2159

"value", # datetime.timedelta or

2160

# None

2161

"followers")) # Tokens valid after

2162

# this token

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

2163

2666

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

2164

2667

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

2165

2668

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

2166

2669

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

2167

2670

datetime.timedelta(seconds=1),

2168

frozenset((token_end,)))

2671

frozenset((token_end, )))

2169

2672

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

2170

2673

datetime.timedelta(minutes=1),

2171

2674

frozenset((token_second, token_end)))

2187

2690

frozenset((token_month, token_end)))

2188

2691

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

2189

2692

datetime.timedelta(weeks=1),

2190

frozenset((token_end,)))

2693

frozenset((token_end, )))

2191

2694

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

2192

2695

frozenset((token_year, token_month,

2193

2696

token_day, token_time,

2194

token_week))),

2195

# Define starting values

2196

value = datetime.timedelta() # Value so far

2697

token_week)))

2698

# Define starting values:

2699

# Value so far

2700

value = datetime.timedelta()

2197

2701

found_token = None

2198

followers = frozenset(token_duration,) # Following valid tokens

2199

s = duration # String left to parse

2702

# Following valid tokens

2703

followers = frozenset((token_duration, ))

2704

# String left to parse

2705

s = duration

2200

2706

# Loop until end token is found

2201

2707

while found_token is not token_end:

2202

2708

# Search for any currently valid tokens

2218

2724

break

2219

2725

else:

2220

2726

# No currently valid tokens were found

2221

raise ValueError("Invalid RFC 3339 duration")

2727

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

2728

.format(duration))

2222

2729

# End token found

2223

2730

return value

2224

2731

2225

2732

2226

2733

def string_to_delta(interval):

2227

2734

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

2228

2735

2229

2736

>>> string_to_delta('7d')

2230

2737

datetime.timedelta(7)

2231

2738

>>> string_to_delta('60s')

2239

2746

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

2240

2747

datetime.timedelta(0, 330)

2241

2748

"""

2242

2749

2243

2750

try:

2244

2751

return rfc3339_duration_to_delta(interval)

2245

2752

except ValueError:

2246

2753

pass

2247

2754

2248

2755

timevalue = datetime.timedelta(0)

2249

2756

for s in interval.split():

2250

2757

try:

2251

suffix = unicode(s[-1])

2758

suffix = s[-1]

2252

2759

value = int(s[:-1])

2253

2760

if suffix == "d":

2254

2761

delta = datetime.timedelta(value)

2261

2768

elif suffix == "w":

2262

2769

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

2263

2770

else:

2264

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

2265

.format(suffix))

2771

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

2266

2772

except IndexError as e:

2267

2773

raise ValueError(*(e.args))

2268

2774

timevalue += delta

2269

2775

return timevalue

2270

2776

2271

2777

2272

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

2778

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

2273

2779

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

2274

2780

2275

2781

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

2276

2782

if os.fork():

2277

2783

sys.exit()

2285

2791

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

2286

2792

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

2287

2793

raise OSError(errno.ENODEV,

2288

"{0} not a character device"

2794

"{} not a character device"

2289

2795

.format(os.devnull))

2290

2796

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

2291

2797

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

2295

2801

2296

2802

2297

2803

def main():

2298

2804

2299

2805

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

2300

2806

# Parsing of options, both command line and config file

2301

2807

2302

2808

parser = argparse.ArgumentParser()

2303

2809

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

2304

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

2810

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

2305

2811

help="show version number and exit")

2306

2812

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

2307

2813

help="Bind to interface IF")

2340

2846

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

2341

2847

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

2342

2848

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

2343

2849

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

2850

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

2851

default=None)

2852

2344

2853

options = parser.parse_args()

2345

2854

2346

2855

if options.check:

2347

2856

import doctest

2348

2857

fail_count, test_count = doctest.testmod()

2349

2858

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

2350

2859

2351

2860

# Default values for config file for server-global settings

2352

server_defaults = { "interface": "",

2353

"address": "",

2354

"port": "",

2355

"debug": "False",

2356

"priority":

2357

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

2358

"servicename": "Mandos",

2359

"use_dbus": "True",

2360

"use_ipv6": "True",

2361

"debuglevel": "",

2362

"restore": "True",

2363

"socket": "",

2364

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

2365

"foreground": "False",

2366

}

2367

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

2368

2879

# Parse config file for server-global settings

2369

2880

server_config = configparser.SafeConfigParser(server_defaults)

2370

2881

del server_defaults

2371

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

2372

"mandos.conf"))

2882

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

2373

2883

# Convert the SafeConfigParser object to a dict

2374

2884

server_settings = server_config.defaults()

2375

2885

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

2389

2899

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

2390

2900

["socket"])

2391

2901

del server_config

2392

2902

2393

2903

# Override the settings from the config file with command line

2394

2904

# options, if set.

2395

2905

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

2396

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

2397

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

2398

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

2906

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

2907

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

2908

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

2399

2909

value = getattr(options, option)

2400

2910

if value is not None:

2401

2911

server_settings[option] = value

2402

2912

del options

2403

2913

# Force all strings to be unicode

2404

2914

for option in server_settings.keys():

2405

if type(server_settings[option]) is str:

2406

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"))

2407

2918

# Force all boolean options to be boolean

2408

2919

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

2409

"foreground"):

2920

"foreground", "zeroconf"):

2410

2921

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

2411

2922

# Debug implies foreground

2412

2923

if server_settings["debug"]:

2413

2924

server_settings["foreground"] = True

2414

2925

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

2415

2926

2416

2927

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

2417

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

2418

2934

# For convenience

2419

2935

debug = server_settings["debug"]

2420

2936

debuglevel = server_settings["debuglevel"]

2423

2939

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

2424

2940

stored_state_file)

2425

2941

foreground = server_settings["foreground"]

2426

2942

zeroconf = server_settings["zeroconf"]

2943

2427

2944

if debug:

2428

2945

initlogger(debug, logging.DEBUG)

2429

2946

else:

2432

2949

else:

2433

2950

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

2434

2951

initlogger(debug, level)

2435

2952

2436

2953

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

2437

syslogger.setFormatter(logging.Formatter

2438

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

2439

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

2440

.format(server_settings

2441

["servicename"])))

2442

2954

syslogger.setFormatter(

2955

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

2956

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

2957

server_settings["servicename"])))

2958

2443

2959

# Parse config file with clients

2444

2960

client_config = configparser.SafeConfigParser(Client

2445

2961

.client_defaults)

2446

2962

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

2447

2963

"clients.conf"))

2448

2964

2449

2965

global mandos_dbus_service

2450

2966

mandos_dbus_service = None

2451

2452

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

2453

server_settings["port"]),

2454

ClientHandler,

2455

interface=(server_settings["interface"]

2456

or None),

2457

use_ipv6=use_ipv6,

2458

gnutls_priority=

2459

server_settings["priority"],

2460

use_dbus=use_dbus,

2461

socketfd=(server_settings["socket"]

2462

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)

2463

2979

if not foreground:

2464

2980

pidfilename = "/run/mandos.pid"

2465

2981

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

2466

2982

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

2467

2983

pidfile = None

2468

2984

try:

2469

pidfile = open(pidfilename, "w")

2985

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

2470

2986

except IOError as e:

2471

2987

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

2472

2988

exc_info=e)

2473

2474

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

2989

2990

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

2991

("mandos", "mandos"),

2992

("nobody", "nogroup")):

2475

2993

try:

2476

2994

uid = pwd.getpwnam(name).pw_uid

2477

gid = pwd.getpwnam(name).pw_gid

2995

gid = pwd.getpwnam(group).pw_gid

2478

2996

break

2479

2997

except KeyError:

2480

2998

continue

2484

3002

try:

2485

3003

os.setgid(gid)

2486

3004

os.setuid(uid)

3005

if debug:

3006

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

3007

gid))

2487

3008

except OSError as error:

3009

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

3010

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

2488

3011

if error.errno != errno.EPERM:

2489

3012

raise

2490

3013

2491

3014

if debug:

2492

3015

# Enable all possible GnuTLS debugging

2493

3016

2494

3017

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

2495

3018

# - GnuTLS manual

2496

gnutls.library.functions.gnutls_global_set_log_level(11)

2497

2498

@gnutls.library.types.gnutls_log_func

3019

gnutls.global_set_log_level(11)

3020

3021

@gnutls.log_func

2499

3022

def debug_gnutls(level, string):

2500

3023

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

2501

2502

(gnutls.library.functions

2503

.gnutls_global_set_log_function(debug_gnutls))

2504

3024

3025

gnutls.global_set_log_function(debug_gnutls)

3026

2505

3027

# Redirect stdin so all checkers get /dev/null

2506

3028

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

2507

3029

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

2508

3030

if null > 2:

2509

3031

os.close(null)

2510

3032

2511

3033

# Need to fork before connecting to D-Bus

2512

3034

if not foreground:

2513

3035

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

2514

3036

daemon()

2515

2516

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

2517

# need to inform gobject that threads will be used.

2518

gobject.threads_init()

2519

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

2520

3042

global main_loop

2521

3043

# From the Avahi example code

2522

3044

DBusGMainLoop(set_as_default=True)

2523

main_loop = gobject.MainLoop()

3045

main_loop = GLib.MainLoop()

2524

3046

bus = dbus.SystemBus()

2525

3047

# End of Avahi example code

2526

3048

if use_dbus:

2527

3049

try:

2528

3050

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

2529

bus, do_not_queue=True)

2530

old_bus_name = (dbus.service.BusName

2531

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

2532

do_not_queue=True))

2533

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:

2534

3057

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

2535

3058

use_dbus = False

2536

3059

server_settings["use_dbus"] = False

2537

3060

tcp_server.use_dbus = False

2538

protocol = avahi.PROTO_INET6 if use_ipv6 else avahi.PROTO_INET

2539

service = AvahiServiceToSyslog(name =

2540

server_settings["servicename"],

2541

servicetype = "_mandos._tcp",

2542

protocol = protocol, bus = bus)

2543

if server_settings["interface"]:

2544

service.interface = (if_nametoindex

2545

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

2546

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

2547

3072

global multiprocessing_manager

2548

3073

multiprocessing_manager = multiprocessing.Manager()

2549

3074

2550

3075

client_class = Client

2551

3076

if use_dbus:

2552

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

2553

3077

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

3078

2554

3079

client_settings = Client.config_parser(client_config)

2555

3080

old_client_settings = {}

2556

3081

clients_data = {}

2557

3082

2558

3083

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

2559

3084

global wnull

2560

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

3085

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

2561

3086

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

2562

3087

# mode

2563

3088

if debug or not foreground:

2564

3089

wnull.close()

2565

3090

2566

3091

# Get client data and settings from last running state.

2567

3092

if server_settings["restore"]:

2568

3093

try:

2569

3094

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

2570

clients_data, old_client_settings = (pickle.load

2571

(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"))

2572

3140

os.remove(stored_state_path)

2573

3141

except IOError as e:

2574

3142

if e.errno == errno.ENOENT:

2575

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

2576

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

3143

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

3144

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

2577

3145

else:

2578

3146

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

2579

3147

exc_info=e)

2580

3148

raise

2581

3149

except EOFError as e:

2582

3150

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

2583

"EOFError:", exc_info=e)

2584

3151

"EOFError:",

3152

exc_info=e)

3153

2585

3154

with PGPEngine() as pgp:

2586

for client_name, client in clients_data.iteritems():

3155

for client_name, client in clients_data.items():

2587

3156

# Skip removed clients

2588

3157

if client_name not in client_settings:

2589

3158

continue

2590

3159

2591

3160

# Decide which value to use after restoring saved state.

2592

3161

# We have three different values: Old config file,

2593

3162

# new config file, and saved state.

2598

3167

# For each value in new config, check if it

2599

3168

# differs from the old config value (Except for

2600

3169

# the "secret" attribute)

2601

if (name != "secret" and

2602

value != old_client_settings[client_name]

2603

[name]):

3170

if (name != "secret"

3171

and (value !=

3172

old_client_settings[client_name][name])):

2604

3173

client[name] = value

2605

3174

except KeyError:

2606

3175

pass

2607

3176

2608

3177

# Clients who has passed its expire date can still be

2609

# enabled if its last checker was successful. Clients

3178

# enabled if its last checker was successful. A Client

2610

3179

# whose checker succeeded before we stored its state is

2611

3180

# assumed to have successfully run all checkers during

2612

3181

# downtime.

2614

3183

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

2615

3184

if not client["last_checked_ok"]:

2616

3185

logger.warning(

2617

"disabling client {0} - Client never "

2618

"performed a successful checker"

2619

.format(client_name))

3186

"disabling client {} - Client never "

3187

"performed a successful checker".format(

3188

client_name))

2620

3189

client["enabled"] = False

2621

3190

elif client["last_checker_status"] != 0:

2622

3191

logger.warning(

2623

"disabling client {0} - Client "

2624

"last checker failed with error code {1}"

2625

.format(client_name,

2626

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"]))

2627

3197

client["enabled"] = False

2628

3198

else:

2629

client["expires"] = (datetime.datetime

2630

.utcnow()

2631

+ client["timeout"])

3199

client["expires"] = (

3200

datetime.datetime.utcnow()

3201

+ client["timeout"])

2632

3202

logger.debug("Last checker succeeded,"

2633

" keeping {0} enabled"

2634

.format(client_name))

3203

" keeping {} enabled".format(

3204

client_name))

2635

3205

try:

2636

client["secret"] = (

2637

pgp.decrypt(client["encrypted_secret"],

2638

client_settings[client_name]

2639

["secret"]))

3206

client["secret"] = pgp.decrypt(

3207

client["encrypted_secret"],

3208

client_settings[client_name]["secret"])

2640

3209

except PGPError:

2641

3210

# If decryption fails, we use secret from new settings

2642

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

2643

.format(client_name))

2644

client["secret"] = (

2645

client_settings[client_name]["secret"])

2646

3211

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

3212

client_name))

3213

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

3214

["secret"])

3215

2647

3216

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

2648

3217

for client_name in (set(old_client_settings)

2649

3218

- set(client_settings)):

2651

3220

for client_name in (set(client_settings)

2652

3221

- set(old_client_settings)):

2653

3222

clients_data[client_name] = client_settings[client_name]

2654

3223

2655

3224

# Create all client objects

2656

for client_name, client in clients_data.iteritems():

3225

for client_name, client in clients_data.items():

2657

3226

tcp_server.clients[client_name] = client_class(

2658

name = client_name, settings = client,

2659

server_settings = server_settings)

2660

3227

name=client_name,

3228

settings=client,

3229

server_settings=server_settings)

3230

2661

3231

if not tcp_server.clients:

2662

3232

logger.warning("No clients defined")

2663

3233

2664

3234

if not foreground:

2665

3235

if pidfile is not None:

3236

pid = os.getpid()

2666

3237

try:

2667

3238

with pidfile:

2668

pid = os.getpid()

2669

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

3239

print(pid, file=pidfile)

2670

3240

except IOError:

2671

3241

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

2672

3242

pidfilename, pid)

2673

3243

del pidfile

2674

3244

del pidfilename

2675

2676

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

2677

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

2678

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

2679

3250

if use_dbus:

2680

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

2681

"se.bsnet.fukt.Mandos"})

2682

class MandosDBusService(DBusObjectWithProperties):

3251

3252

@alternate_dbus_interfaces(

3253

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

3254

class MandosDBusService(DBusObjectWithObjectManager):

2683

3255

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

3256

2684

3257

def __init__(self):

2685

3258

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

3259

2686

3260

_interface = "se.recompile.Mandos"

2687

2688

@dbus_interface_annotations(_interface)

2689

def _foo(self):

2690

return { "org.freedesktop.DBus.Property"

2691

".EmitsChangedSignal":

2692

"false"}

2693

3261

2694

3262

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

2695

3263

def ClientAdded(self, objpath):

2696

3264

"D-Bus signal"

2697

3265

pass

2698

3266

2699

3267

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

2700

3268

def ClientNotFound(self, fingerprint, address):

2701

3269

"D-Bus signal"

2702

3270

pass

2703

3271

3272

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

3273

"true"})

2704

3274

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

2705

3275

def ClientRemoved(self, objpath, name):

2706

3276

"D-Bus signal"

2707

3277

pass

2708

3278

3279

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

3280

"true"})

2709

3281

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

2710

3282

def GetAllClients(self):

2711

3283

"D-Bus method"

2712

return dbus.Array(c.dbus_object_path

2713

for c in

2714

tcp_server.clients.itervalues())

2715

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"})

2716

3289

@dbus.service.method(_interface,

2717

3290

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

2718

3291

def GetAllClientsWithProperties(self):

2719

3292

"D-Bus method"

2720

3293

return dbus.Dictionary(

2721

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

2722

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()},

2723

3297

signature="oa{sv}")

2724

3298

2725

3299

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

2726

3300

def RemoveClient(self, object_path):

2727

3301

"D-Bus method"

2728

for c in tcp_server.clients.itervalues():

3302

for c in tcp_server.clients.values():

2729

3303

if c.dbus_object_path == object_path:

2730

3304

del tcp_server.clients[c.name]

2731

3305

c.remove_from_connection()

2732

# Don't signal anything except ClientRemoved

3306

# Don't signal the disabling

2733

3307

c.disable(quiet=True)

2734

# Emit D-Bus signal

2735

self.ClientRemoved(object_path, c.name)

3308

# Emit D-Bus signal for removal

3309

self.client_removed_signal(c)

2736

3310

return

2737

3311

raise KeyError(object_path)

2738

3312

2739

3313

del _interface

2740

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

2741

3351

mandos_dbus_service = MandosDBusService()

2742

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

2743

3358

def cleanup():

2744

3359

"Cleanup function; run on exit"

2745

service.cleanup()

2746

2747

multiprocessing.active_children()

2748

wnull.close()

3360

if zeroconf:

3361

service.cleanup()

3362

3363

mp.active_children()

3364

wn.close()

2749

3365

if not (tcp_server.clients or client_settings):

2750

3366

return

2751

3367

2752

3368

# Store client before exiting. Secrets are encrypted with key

2753

3369

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

2754

3370

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

2755

3371

clients = {}

2756

3372

with PGPEngine() as pgp:

2757

for client in tcp_server.clients.itervalues():

3373

for client in tcp_server.clients.values():

2758

3374

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

2759

3375

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

2760

3376

key)

2761

3377

client_dict = {}

2762

3378

2763

3379

# A list of attributes that can not be pickled

2764

3380

# + secret.

2765

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

2766

"checker", "server_settings"))

2767

for name, typ in (inspect.getmembers

2768

(dbus.service.Object)):

3381

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

3382

"checker", "server_settings"}

3383

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

3384

.Object):

2769

3385

exclude.add(name)

2770

3386

2771

3387

client_dict["encrypted_secret"] = (client

2772

3388

.encrypted_secret)

2773

3389

for attr in client.client_structure:

2774

3390

if attr not in exclude:

2775

3391

client_dict[attr] = getattr(client, attr)

2776

3392

2777

3393

clients[client.name] = client_dict

2778

3394

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

2779

3395

2780

3396

try:

2781

with (tempfile.NamedTemporaryFile

2782

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

2783

dir=os.path.dirname(stored_state_path),

2784

delete=False)) as stored_state:

2785

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

2786

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

2787

3406

os.rename(tempname, stored_state_path)

2788

3407

except (IOError, OSError) as e:

2789

3408

if not debug:

2792

3411

except NameError:

2793

3412

pass

2794

3413

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

2795

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

3414

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

2796

3415

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

2797

3416

else:

2798

3417

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

2799

3418

exc_info=e)

2800

3419

raise

2801

3420

2802

3421

# Delete all clients, and settings from config

2803

3422

while tcp_server.clients:

2804

3423

name, client = tcp_server.clients.popitem()

2805

3424

if use_dbus:

2806

3425

client.remove_from_connection()

2807

# Don't signal anything except ClientRemoved

3426

# Don't signal the disabling

2808

3427

client.disable(quiet=True)

3428

# Emit D-Bus signal for removal

2809

3429

if use_dbus:

2810

# Emit D-Bus signal

2811

mandos_dbus_service.ClientRemoved(client

2812

.dbus_object_path,

2813

client.name)

3430

mandos_dbus_service.client_removed_signal(client)

2814

3431

client_settings.clear()

2815

3432

2816

3433

atexit.register(cleanup)

2817

2818

for client in tcp_server.clients.itervalues():

3434

3435

for client in tcp_server.clients.values():

2819

3436

if use_dbus:

2820

# Emit D-Bus signal

2821

mandos_dbus_service.ClientAdded(client.dbus_object_path)

3437

# Emit D-Bus signal for adding

3438

mandos_dbus_service.client_added_signal(client)

2822

3439

# Need to initiate checking of clients

2823

3440

if client.enabled:

2824

3441

client.init_checker()

2825

3442

2826

3443

tcp_server.enable()

2827

3444

tcp_server.server_activate()

2828

3445

2829

3446

# Find out what port we got

2830

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

3447

if zeroconf:

3448

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

2831

3449

if use_ipv6:

2832

3450

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

2833

3451

" flowinfo %d, scope_id %d",

2835

3453

else: # IPv4

2836

3454

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

2837

3455

*tcp_server.socket.getsockname())

2838

2839

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

2840

3456

3457

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

3458

2841

3459

try:

2842

# From the Avahi example code

2843

try:

2844

service.activate()

2845

except dbus.exceptions.DBusException as error:

2846

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

2847

cleanup()

2848

sys.exit(1)

2849

# End of Avahi example code

2850

2851

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

2852

lambda *args, **kwargs:

2853

(tcp_server.handle_request

2854

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

2855

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

2856

3475

logger.debug("Starting main loop")

2857

3476

main_loop.run()

2858

3477

except AvahiError as error:

2867

3486

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

2868

3487

cleanup()

2869

3488

3489

2870

3490

if __name__ == '__main__':

2871

3491

main()