/mandos/release : revision 237.7.195

1

#!/usr/bin/python

2

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

3

#

3

#

4

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

5

#

5

#

6

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

7

# service publisher, downloaded from

8

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

9

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

10

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

11

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

12

#

12

#

13

# Everything else is

14

15

16

#

14

15

16

#

17

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

18

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

19

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

23

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

24

# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the

25

# GNU General Public License for more details.

26

#

26

#

27

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

28

# along with this program. If not, see

29

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

30

#

30

#

31

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

32

#

32

#

33

34

from __future__ import (division, absolute_import, print_function,

35

unicode_literals)

36

37

try:

38

from future_builtins import *

39

except ImportError:

40

pass

37

from future_builtins import *

41

38

42

try:

43

import SocketServer as socketserver

44

except ImportError:

45

import socketserver

39

import SocketServer as socketserver

46

40

import socket

47

41

import argparse

48

42

import datetime

49

43

import errno

50

try:

51

import ConfigParser as configparser

52

except ImportError:

53

import configparser

44

import gnutls.crypto

45

import gnutls.connection

46

import gnutls.errors

47

import gnutls.library.functions

48

import gnutls.library.constants

49

import gnutls.library.types

50

import ConfigParser as configparser

54

51

import sys

55

52

import re

56

53

import os

65

62

import struct

66

63

import fcntl

67

64

import functools

68

try:

69

import cPickle as pickle

70

except ImportError:

71

import pickle

65

import cPickle as pickle

72

66

import multiprocessing

73

67

import types

74

68

import binascii

75

69

import tempfile

76

70

import itertools

77

71

import collections

78

import codecs

79

72

80

73

import dbus

81

74

import dbus.service

82

from gi.repository import GLib

75

import gobject

76

import avahi

83

77

from dbus.mainloop.glib import DBusGMainLoop

84

78

import ctypes

85

79

import ctypes.util

86

80

import xml.dom.minidom

87

81

import inspect

88

82

89

# Try to find the value of SO_BINDTODEVICE:

90

83

try:

91

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

92

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

93

84

SO_BINDTODEVICE = socket.SO_BINDTODEVICE

94

85

except AttributeError:

95

86

try:

96

# This is where SO_BINDTODEVICE was up to and including Python

97

# 2.6, and also 3.2:

98

87

from IN import SO_BINDTODEVICE

99

88

except ImportError:

100

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

101

# Try running the C preprocessor:

102

try:

103

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

104

"/dev/stdin"],

105

stdin=subprocess.PIPE,

106

stdout=subprocess.PIPE)

107

stdout = cc.communicate(

108

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

109

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

110

except (OSError, ValueError, IndexError):

111

# No value found

112

SO_BINDTODEVICE = None

113

114

if sys.version_info.major == 2:

115

str = unicode

116

117

version = "1.7.13"

89

SO_BINDTODEVICE = None

90

91

version = "1.6.2"

118

92

stored_state_file = "clients.pickle"

119

93

120

94

logger = logging.getLogger()

121

syslogger = None

95

syslogger = (logging.handlers.SysLogHandler

96

(facility = logging.handlers.SysLogHandler.LOG_DAEMON,

97

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

122

98

123

99

try:

124

if_nametoindex = ctypes.cdll.LoadLibrary(

125

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

100

if_nametoindex = (ctypes.cdll.LoadLibrary

101

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

102

.if_nametoindex)

126

103

except (OSError, AttributeError):

127

128

104

def if_nametoindex(interface):

129

105

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

130

106

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

131

107

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

132

108

ifreq = fcntl.ioctl(s, SIOCGIFINDEX,

133

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

134

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

109

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

110

interface))

111

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

112

ifreq[16:20])[0]

135

113

return interface_index

136

114

137

115

138

def copy_function(func):

139

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

140

if sys.version_info.major == 2:

141

return types.FunctionType(func.func_code,

142

func.func_globals,

143

func.func_name,

144

func.func_defaults,

145

func.func_closure)

146

else:

147

return types.FunctionType(func.__code__,

148

func.__globals__,

149

func.__name__,

150

func.__defaults__,

151

func.__closure__)

152

153

154

116

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

155

117

"""init logger and add loglevel"""

156

157

global syslogger

158

syslogger = (logging.handlers.SysLogHandler(

159

facility=logging.handlers.SysLogHandler.LOG_DAEMON,

160

address="/dev/log"))

118

161

119

syslogger.setFormatter(logging.Formatter

162

120

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

163

121

' %(message)s'))

164

122

logger.addHandler(syslogger)

165

123

166

124

if debug:

167

125

console = logging.StreamHandler()

168

126

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

180

138

181

139

class PGPEngine(object):

182

140

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

183

184

141

def __init__(self):

185

142

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

186

self.gpg = "gpg"

187

try:

188

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

189

for line in output.splitlines():

190

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

191

if name == "gpg":

192

self.gpg = path

193

break

194

except OSError as e:

195

if e.errno != errno.ENOENT:

196

raise

197

143

self.gnupgargs = ['--batch',

198

'--homedir', self.tempdir,

144

'--home', self.tempdir,

199

145

'--force-mdc',

200

'--quiet']

201

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

202

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

203

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

204

146

'--quiet',

147

'--no-use-agent']

148

205

149

def __enter__(self):

206

150

return self

207

151

208

152

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

209

153

self._cleanup()

210

154

return False

211

155

212

156

def __del__(self):

213

157

self._cleanup()

214

158

215

159

def _cleanup(self):

216

160

if self.tempdir is not None:

217

161

# Delete contents of tempdir

218

162

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

219

topdown=False):

163

topdown = False):

220

164

for filename in files:

221

165

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

222

166

for dirname in dirs:

224

168

# Remove tempdir

225

169

os.rmdir(self.tempdir)

226

170

self.tempdir = None

227

171

228

172

def password_encode(self, password):

229

173

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

230

174

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

235

179

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

236

180

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

237

181

return encoded

238

182

239

183

def encrypt(self, data, password):

240

184

passphrase = self.password_encode(password)

241

with tempfile.NamedTemporaryFile(

242

dir=self.tempdir) as passfile:

185

with tempfile.NamedTemporaryFile(dir=self.tempdir

186

) as passfile:

243

187

passfile.write(passphrase)

244

188

passfile.flush()

245

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

189

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

246

190

'--passphrase-file',

247

191

passfile.name]

248

192

+ self.gnupgargs,

249

stdin=subprocess.PIPE,

250

stdout=subprocess.PIPE,

251

stderr=subprocess.PIPE)

252

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

193

stdin = subprocess.PIPE,

194

stdout = subprocess.PIPE,

195

stderr = subprocess.PIPE)

196

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

253

197

if proc.returncode != 0:

254

198

raise PGPError(err)

255

199

return ciphertext

256

200

257

201

def decrypt(self, data, password):

258

202

passphrase = self.password_encode(password)

259

with tempfile.NamedTemporaryFile(

260

dir=self.tempdir) as passfile:

203

with tempfile.NamedTemporaryFile(dir = self.tempdir

204

) as passfile:

261

205

passfile.write(passphrase)

262

206

passfile.flush()

263

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

207

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

264

208

'--passphrase-file',

265

209

passfile.name]

266

210

+ self.gnupgargs,

267

stdin=subprocess.PIPE,

268

stdout=subprocess.PIPE,

269

stderr=subprocess.PIPE)

270

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

211

stdin = subprocess.PIPE,

212

stdout = subprocess.PIPE,

213

stderr = subprocess.PIPE)

214

decrypted_plaintext, err = proc.communicate(input

215

= data)

271

216

if proc.returncode != 0:

272

217

raise PGPError(err)

273

218

return decrypted_plaintext

274

219

275

220

276

# Pretend that we have an Avahi module

277

class Avahi(object):

278

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

279

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

280

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

281

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

282

PROTO_INET = 0 # avahi-common/address.h

283

PROTO_INET6 = 1 # avahi-common/address.h

284

DBUS_NAME = "org.freedesktop.Avahi"

285

DBUS_INTERFACE_ENTRY_GROUP = DBUS_NAME + ".EntryGroup"

286

DBUS_INTERFACE_SERVER = DBUS_NAME + ".Server"

287

DBUS_PATH_SERVER = "/"

288

289

def string_array_to_txt_array(self, t):

290

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

291

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

292

ENTRY_GROUP_ESTABLISHED = 2 # avahi-common/defs.h

293

ENTRY_GROUP_COLLISION = 3 # avahi-common/defs.h

294

ENTRY_GROUP_FAILURE = 4 # avahi-common/defs.h

295

SERVER_INVALID = 0 # avahi-common/defs.h

296

SERVER_REGISTERING = 1 # avahi-common/defs.h

297

SERVER_RUNNING = 2 # avahi-common/defs.h

298

SERVER_COLLISION = 3 # avahi-common/defs.h

299

SERVER_FAILURE = 4 # avahi-common/defs.h

300

avahi = Avahi()

301

302

303

221

class AvahiError(Exception):

304

222

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

305

223

self.value = value

306

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

307

**kwargs)

308

224

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

225

def __unicode__(self):

226

return unicode(repr(self.value))

309

227

310

228

class AvahiServiceError(AvahiError):

311

229

pass

312

230

313

314

231

class AvahiGroupError(AvahiError):

315

232

pass

316

233

317

234

318

235

class AvahiService(object):

319

236

"""An Avahi (Zeroconf) service.

320

237

321

238

Attributes:

322

239

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

323

240

Used to optionally bind to the specified interface.

335

252

server: D-Bus Server

336

253

bus: dbus.SystemBus()

337

254

"""

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):

255

256

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

257

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

258

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

259

protocol = avahi.PROTO_UNSPEC, bus = None):

350

260

self.interface = interface

351

261

self.name = name

352

262

self.type = servicetype

361

271

self.server = None

362

272

self.bus = bus

363

273

self.entry_group_state_changed_match = None

364

365

def rename(self, remove=True):

274

275

def rename(self):

366

276

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

367

277

if self.rename_count >= self.max_renames:

368

278

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

369

279

" after %i retries, exiting.",

370

280

self.rename_count)

371

281

raise AvahiServiceError("Too many renames")

372

self.name = str(

373

self.server.GetAlternativeServiceName(self.name))

374

self.rename_count += 1

282

self.name = unicode(self.server

283

.GetAlternativeServiceName(self.name))

375

284

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

376

285

self.name)

377

if remove:

378

self.remove()

286

self.remove()

379

287

try:

380

288

self.add()

381

289

except dbus.exceptions.DBusException as error:

382

if (error.get_dbus_name()

383

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

384

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

385

return self.rename(remove=False)

386

else:

387

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

388

self.cleanup()

389

os._exit(1)

390

290

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

291

self.cleanup()

292

os._exit(1)

293

self.rename_count += 1

294

391

295

def remove(self):

392

296

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

393

297

if self.entry_group_state_changed_match is not None:

395

299

self.entry_group_state_changed_match = None

396

300

if self.group is not None:

397

301

self.group.Reset()

398

302

399

303

def add(self):

400

304

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

401

305

self.remove()

418

322

dbus.UInt16(self.port),

419

323

avahi.string_array_to_txt_array(self.TXT))

420

324

self.group.Commit()

421

325

422

326

def entry_group_state_changed(self, state, error):

423

327

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

424

328

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

425

329

426

330

if state == avahi.ENTRY_GROUP_ESTABLISHED:

427

331

logger.debug("Zeroconf service established.")

428

332

elif state == avahi.ENTRY_GROUP_COLLISION:

430

334

self.rename()

431

335

elif state == avahi.ENTRY_GROUP_FAILURE:

432

336

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

433

str(error))

434

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

435

337

unicode(error))

338

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

339

.format(error))

340

436

341

def cleanup(self):

437

342

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

438

343

if self.group is not None:

443

348

pass

444

349

self.group = None

445

350

self.remove()

446

351

447

352

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

448

353

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

449

354

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

450

bad_states = {

451

avahi.SERVER_INVALID: "Zeroconf server invalid",

452

avahi.SERVER_REGISTERING: None,

453

avahi.SERVER_COLLISION: "Zeroconf server name collision",

454

avahi.SERVER_FAILURE: "Zeroconf server failure",

455

}

355

bad_states = { avahi.SERVER_INVALID:

356

"Zeroconf server invalid",

357

avahi.SERVER_REGISTERING: None,

358

avahi.SERVER_COLLISION:

359

"Zeroconf server name collision",

360

avahi.SERVER_FAILURE:

361

"Zeroconf server failure" }

456

362

if state in bad_states:

457

363

if bad_states[state] is not None:

458

364

if error is None:

461

367

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

462

368

self.cleanup()

463

369

elif state == avahi.SERVER_RUNNING:

464

try:

465

self.add()

466

except dbus.exceptions.DBusException as error:

467

if (error.get_dbus_name()

468

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

469

logger.info("Local Zeroconf service name"

470

" collision.")

471

return self.rename(remove=False)

472

else:

473

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

474

self.cleanup()

475

os._exit(1)

370

self.add()

476

371

else:

477

372

if error is None:

478

373

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

479

374

else:

480

375

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

481

376

482

377

def activate(self):

483

378

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

484

379

if self.server is None:

488

383

follow_name_owner_changes=True),

489

384

avahi.DBUS_INTERFACE_SERVER)

490

385

self.server.connect_to_signal("StateChanged",

491

self.server_state_changed)

386

self.server_state_changed)

492

387

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

493

388

494

389

495

390

class AvahiServiceToSyslog(AvahiService):

496

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

391

def rename(self):

497

392

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

498

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

499

syslogger.setFormatter(logging.Formatter(

500

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

501

.format(self.name)))

393

ret = AvahiService.rename(self)

394

syslogger.setFormatter(logging.Formatter

395

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

396

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

397

.format(self.name)))

502

398

return ret

503

399

504

400

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()

401

def timedelta_to_milliseconds(td):

402

"Convert a datetime.timedelta() to milliseconds"

403

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

404

+ (td.seconds * 1000)

405

+ (td.microseconds // 1000))

777

406

778

407

779

408

class Client(object):

780

409

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

781

410

782

411

Attributes:

783

412

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

784

413

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

786

415

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

787

416

to see if the client lives.

788

417

'None' if no process is running.

789

checker_callback_tag: a GLib event source tag, or None

418

checker_callback_tag: a gobject event source tag, or None

790

419

checker_command: string; External command which is run to check

791

420

if client lives. %() expansions are done at

792

421

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

793

422

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

794

checker_initiator_tag: a GLib event source tag, or None

423

checker_initiator_tag: a gobject event source tag, or None

795

424

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

796

425

client_structure: Object describing what attributes a client has

797

426

and is used for storing the client at exit

798

427

current_checker_command: string; current running checker_command

799

disable_initiator_tag: a GLib event source tag, or None

428

disable_initiator_tag: a gobject event source tag, or None

800

429

enabled: bool()

801

430

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

802

431

uniquely identify the client

807

436

last_checker_status: integer between 0 and 255 reflecting exit

808

437

status of last checker. -1 reflects crashed

809

438

checker, -2 means no checker completed yet.

810

last_checker_signal: The signal which killed the last checker, if

811

last_checker_status is -1

812

439

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

813

440

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

814

441

D-Bus identifiers

821

448

disabled, or None

822

449

server_settings: The server_settings dict from main()

823

450

"""

824

451

825

452

runtime_expansions = ("approval_delay", "approval_duration",

826

453

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

827

454

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

828

455

"last_approval_request", "last_checked_ok",

829

456

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

830

client_defaults = {

831

"timeout": "PT5M",

832

"extended_timeout": "PT15M",

833

"interval": "PT2M",

834

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

835

"host": "",

836

"approval_delay": "PT0S",

837

"approval_duration": "PT1S",

838

"approved_by_default": "True",

839

"enabled": "True",

840

}

841

457

client_defaults = { "timeout": "PT5M",

458

"extended_timeout": "PT15M",

459

"interval": "PT2M",

460

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

461

"host": "",

462

"approval_delay": "PT0S",

463

"approval_duration": "PT1S",

464

"approved_by_default": "True",

465

"enabled": "True",

466

}

467

468

def timeout_milliseconds(self):

469

"Return the 'timeout' attribute in milliseconds"

470

return timedelta_to_milliseconds(self.timeout)

471

472

def extended_timeout_milliseconds(self):

473

"Return the 'extended_timeout' attribute in milliseconds"

474

return timedelta_to_milliseconds(self.extended_timeout)

475

476

def interval_milliseconds(self):

477

"Return the 'interval' attribute in milliseconds"

478

return timedelta_to_milliseconds(self.interval)

479

480

def approval_delay_milliseconds(self):

481

return timedelta_to_milliseconds(self.approval_delay)

482

842

483

@staticmethod

843

484

def config_parser(config):

844

485

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

851

492

for client_name in config.sections():

852

493

section = dict(config.items(client_name))

853

494

client = settings[client_name] = {}

854

495

855

496

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

856

497

# Reformat values from string types to Python types

857

498

client["approved_by_default"] = config.getboolean(

858

499

client_name, "approved_by_default")

859

500

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

860

501

"enabled")

861

862

# Uppercase and remove spaces from fingerprint for later

863

# comparison purposes with return value from the

864

# fingerprint() function

502

865

503

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

866

504

.replace(" ", ""))

867

505

if "secret" in section:

868

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

869

.encode("utf-8"),

870

"base64")

506

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

871

507

elif "secfile" in section:

872

508

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

873

509

(section["secfile"])),

874

510

"rb") as secfile:

875

511

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

876

512

else:

877

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

513

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

878

514

.format(section))

879

515

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

880

516

client["extended_timeout"] = string_to_delta(

888

524

client["last_approval_request"] = None

889

525

client["last_checked_ok"] = None

890

526

client["last_checker_status"] = -2

891

527

892

528

return settings

893

894

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

529

530

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

895

531

self.name = name

896

532

if server_settings is None:

897

533

server_settings = {}

898

534

self.server_settings = server_settings

899

535

# adding all client settings

900

for setting, value in settings.items():

536

for setting, value in settings.iteritems():

901

537

setattr(self, setting, value)

902

538

903

539

if self.enabled:

904

540

if not hasattr(self, "last_enabled"):

905

541

self.last_enabled = datetime.datetime.utcnow()

909

545

else:

910

546

self.last_enabled = None

911

547

self.expires = None

912

548

913

549

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

550

# Uppercase and remove spaces from fingerprint for later

551

# comparison purposes with return value from the fingerprint()

552

# function

914

553

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

915

554

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

916

555

datetime.datetime.utcnow())

917

556

918

557

# attributes specific for this server instance

919

558

self.checker = None

920

559

self.checker_initiator_tag = None

923

562

self.current_checker_command = None

924

563

self.approved = None

925

564

self.approvals_pending = 0

926

self.changedstate = multiprocessing_manager.Condition(

927

multiprocessing_manager.Lock())

928

self.client_structure = [attr

929

for attr in self.__dict__.keys()

565

self.changedstate = (multiprocessing_manager

566

.Condition(multiprocessing_manager

567

.Lock()))

568

self.client_structure = [attr for attr in

569

self.__dict__.iterkeys()

930

570

if not attr.startswith("_")]

931

571

self.client_structure.append("client_structure")

932

933

for name, t in inspect.getmembers(

934

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

572

573

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

574

lambda obj:

575

isinstance(obj,

576

property)):

935

577

if not name.startswith("_"):

936

578

self.client_structure.append(name)

937

579

938

580

# Send notice to process children that client state has changed

939

581

def send_changedstate(self):

940

582

with self.changedstate:

941

583

self.changedstate.notify_all()

942

584

943

585

def enable(self):

944

586

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

945

587

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

950

592

self.last_enabled = datetime.datetime.utcnow()

951

593

self.init_checker()

952

594

self.send_changedstate()

953

595

954

596

def disable(self, quiet=True):

955

597

"""Disable this client."""

956

598

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

958

600

if not quiet:

959

601

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

960

602

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

961

GLib.source_remove(self.disable_initiator_tag)

603

gobject.source_remove(self.disable_initiator_tag)

962

604

self.disable_initiator_tag = None

963

605

self.expires = None

964

606

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

965

GLib.source_remove(self.checker_initiator_tag)

607

gobject.source_remove(self.checker_initiator_tag)

966

608

self.checker_initiator_tag = None

967

609

self.stop_checker()

968

610

self.enabled = False

969

611

if not quiet:

970

612

self.send_changedstate()

971

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

613

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

972

614

return False

973

615

974

616

def __del__(self):

975

617

self.disable()

976

618

977

619

def init_checker(self):

978

620

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

979

621

# and every interval from then on.

980

622

if self.checker_initiator_tag is not None:

981

GLib.source_remove(self.checker_initiator_tag)

982

self.checker_initiator_tag = GLib.timeout_add(

983

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

984

self.start_checker)

623

gobject.source_remove(self.checker_initiator_tag)

624

self.checker_initiator_tag = (gobject.timeout_add

625

(self.interval_milliseconds(),

626

self.start_checker))

985

627

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

986

628

if self.disable_initiator_tag is not None:

987

GLib.source_remove(self.disable_initiator_tag)

988

self.disable_initiator_tag = GLib.timeout_add(

989

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

629

gobject.source_remove(self.disable_initiator_tag)

630

self.disable_initiator_tag = (gobject.timeout_add

631

(self.timeout_milliseconds(),

632

self.disable))

990

633

# Also start a new checker *right now*.

991

634

self.start_checker()

992

993

def checker_callback(self, source, condition, connection,

994

command):

635

636

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

995

637

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

996

638

self.checker_callback_tag = None

997

639

self.checker = None

998

# Read return code from connection (see call_pipe)

999

returncode = connection.recv()

1000

connection.close()

1001

1002

if returncode >= 0:

1003

self.last_checker_status = returncode

1004

self.last_checker_signal = None

640

if os.WIFEXITED(condition):

641

self.last_checker_status = os.WEXITSTATUS(condition)

1005

642

if self.last_checker_status == 0:

1006

643

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

1007

644

vars(self))

1008

645

self.checked_ok()

1009

646

else:

1010

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

647

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

648

vars(self))

1011

649

else:

1012

650

self.last_checker_status = -1

1013

self.last_checker_signal = -returncode

1014

651

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

1015

652

vars(self))

1016

return False

1017

653

1018

654

def checked_ok(self):

1019

655

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

1020

656

self.last_checked_ok = datetime.datetime.utcnow()

1021

657

self.last_checker_status = 0

1022

self.last_checker_signal = None

1023

658

self.bump_timeout()

1024

659

1025

660

def bump_timeout(self, timeout=None):

1026

661

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

1027

662

if timeout is None:

1028

663

timeout = self.timeout

1029

664

if self.disable_initiator_tag is not None:

1030

GLib.source_remove(self.disable_initiator_tag)

665

gobject.source_remove(self.disable_initiator_tag)

1031

666

self.disable_initiator_tag = None

1032

667

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

1033

self.disable_initiator_tag = GLib.timeout_add(

1034

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

668

self.disable_initiator_tag = (gobject.timeout_add

669

(timedelta_to_milliseconds

670

(timeout), self.disable))

1035

671

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

1036

672

1037

673

def need_approval(self):

1038

674

self.last_approval_request = datetime.datetime.utcnow()

1039

675

1040

676

def start_checker(self):

1041

677

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

1042

678

1043

679

If a checker already exists, leave it running and do

1044

680

nothing."""

1045

681

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

1050

686

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

1051

687

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

1052

688

# should be.

1053

1054

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

1055

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

1056

self.checker.join()

1057

self.checker = None

689

690

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

691

try:

692

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

693

except AttributeError:

694

pass

695

except OSError as error:

696

if error.errno != errno.ECHILD:

697

raise

698

else:

699

if pid:

700

logger.warning("Checker was a zombie")

701

gobject.source_remove(self.checker_callback_tag)

702

self.checker_callback(pid, status,

703

self.current_checker_command)

1058

704

# Start a new checker if needed

1059

705

if self.checker is None:

1060

706

# Escape attributes for the shell

1061

escaped_attrs = {

1062

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

1063

for attr in self.runtime_expansions}

707

escaped_attrs = dict(

708

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

709

for attr in

710

self.runtime_expansions)

1064

711

try:

1065

712

command = self.checker_command % escaped_attrs

1066

713

except TypeError as error:

1067

714

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

1068

self.checker_command,

715

self.checker_command, exc_info=error)

716

return True # Try again later

717

self.current_checker_command = command

718

try:

719

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

720

command, self.name)

721

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

722

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

723

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

724

# always replaced by /dev/null.)

725

# The exception is when not debugging but nevertheless

726

# running in the foreground; use the previously

727

# created wnull.

728

popen_args = {}

729

if (not self.server_settings["debug"]

730

and self.server_settings["foreground"]):

731

popen_args.update({"stdout": wnull,

732

"stderr": wnull })

733

self.checker = subprocess.Popen(command,

734

close_fds=True,

735

shell=True, cwd="/",

736

**popen_args)

737

except OSError as error:

738

logger.error("Failed to start subprocess",

1069

739

exc_info=error)

1070

return True # Try again later

1071

self.current_checker_command = command

1072

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

1073

self.name)

1074

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

1075

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

1076

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

1077

# always replaced by /dev/null.)

1078

# The exception is when not debugging but nevertheless

1079

# running in the foreground; use the previously

1080

# created wnull.

1081

popen_args = {"close_fds": True,

1082

"shell": True,

1083

"cwd": "/"}

1084

if (not self.server_settings["debug"]

1085

and self.server_settings["foreground"]):

1086

popen_args.update({"stdout": wnull,

1087

"stderr": wnull})

1088

pipe = multiprocessing.Pipe(duplex=False)

1089

self.checker = multiprocessing.Process(

1090

target=call_pipe,

1091

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

1092

kwargs=popen_args)

1093

self.checker.start()

1094

self.checker_callback_tag = GLib.io_add_watch(

1095

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

1096

self.checker_callback, pipe[0], command)

1097

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

740

return True

741

self.checker_callback_tag = (gobject.child_watch_add

742

(self.checker.pid,

743

self.checker_callback,

744

data=command))

745

# The checker may have completed before the gobject

746

# watch was added. Check for this.

747

try:

748

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

749

except OSError as error:

750

if error.errno == errno.ECHILD:

751

# This should never happen

752

logger.error("Child process vanished",

753

exc_info=error)

754

return True

755

raise

756

if pid:

757

gobject.source_remove(self.checker_callback_tag)

758

self.checker_callback(pid, status, command)

759

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

1098

760

return True

1099

761

1100

762

def stop_checker(self):

1101

763

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

1102

764

if self.checker_callback_tag:

1103

GLib.source_remove(self.checker_callback_tag)

765

gobject.source_remove(self.checker_callback_tag)

1104

766

self.checker_callback_tag = None

1105

767

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

1106

768

return

1107

769

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

1108

self.checker.terminate()

770

try:

771

self.checker.terminate()

772

#time.sleep(0.5)

773

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

774

# self.checker.kill()

775

except OSError as error:

776

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

777

raise

1109

778

self.checker = None

1110

779

1111

780

1112

def dbus_service_property(dbus_interface,

1113

signature="v",

1114

access="readwrite",

1115

byte_arrays=False):

781

def dbus_service_property(dbus_interface, signature="v",

782

access="readwrite", byte_arrays=False):

1116

783

"""Decorators for marking methods of a DBusObjectWithProperties to

1117

784

become properties on the D-Bus.

1118

785

1119

786

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

1120

787

and with one argument by "Set".

1121

788

1122

789

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

1123

790

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

1124

791

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

1127

794

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

1128

795

if byte_arrays and signature != "ay":

1129

796

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

1130

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

1131

797

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

1132

798

def decorator(func):

1133

799

func._dbus_is_property = True

1134

800

func._dbus_interface = dbus_interface

1137

803

func._dbus_name = func.__name__

1138

804

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

1139

805

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

1140

func._dbus_get_args_options = {'byte_arrays': byte_arrays}

806

func._dbus_get_args_options = {'byte_arrays': byte_arrays }

1141

807

return func

1142

1143

808

return decorator

1144

809

1145

810

1146

811

def dbus_interface_annotations(dbus_interface):

1147

812

"""Decorator for marking functions returning interface annotations

1148

813

1149

814

Usage:

1150

815

1151

816

@dbus_interface_annotations("org.example.Interface")

1152

817

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

1153

818

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

1154

819

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

1155

820

"false"}

1156

821

"""

1157

1158

822

def decorator(func):

1159

823

func._dbus_is_interface = True

1160

824

func._dbus_interface = dbus_interface

1161

825

func._dbus_name = dbus_interface

1162

826

return func

1163

1164

827

return decorator

1165

828

1166

829

1167

830

def dbus_annotations(annotations):

1168

831

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

1169

832

Usage:

1170

1171

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

1172

"org.freedesktop.DBus.Property."

1173

"EmitsChangedSignal": "false"})

833

1174

834

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

1175

835

access="r")

836

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

837

"org.freedesktop.DBus.Property."

838

"EmitsChangedSignal": "false"})

1176

839

def Property_dbus_property(self):

1177

840

return dbus.Boolean(False)

1178

1179

See also the DBusObjectWithAnnotations class.

1180

841

"""

1181

1182

842

def decorator(func):

1183

843

func._dbus_annotations = annotations

1184

844

return func

1185

1186

845

return decorator

1187

846

1188

847

1189

848

class DBusPropertyException(dbus.exceptions.DBusException):

1190

849

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

1191

850

"""

1192

pass

851

def __unicode__(self):

852

return unicode(str(self))

1193

853

1194

854

1195

855

class DBusPropertyAccessException(DBusPropertyException):

1204

864

pass

1205

865

1206

866

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.

867

class DBusObjectWithProperties(dbus.service.Object):

868

"""A D-Bus object with properties.

869

870

Classes inheriting from this can use the dbus_service_property

871

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

872

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

1212

873

"""

1213

874

1214

875

@staticmethod

1215

876

def _is_dbus_thing(thing):

1216

877

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

1217

878

1218

879

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

1219

880

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

1220

881

"""

1221

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

882

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

1222

883

False)

1223

884

1224

885

def _get_all_dbus_things(self, thing):

1225

886

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

1226

887

"""

1227

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

888

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

889

name),

1228

890

athing.__get__(self))

1229

891

for cls in self.__class__.__mro__

1230

892

for name, athing in

1231

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

1232

1233

@dbus.service.method(dbus.INTROSPECTABLE_IFACE,

1234

out_signature="s",

1235

path_keyword='object_path',

1236

connection_keyword='connection')

1237

def Introspect(self, object_path, connection):

1238

"""Overloading of standard D-Bus method.

1239

1240

Inserts annotation tags on methods and signals.

1241

"""

1242

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

1243

connection)

1244

try:

1245

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

1246

1247

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

1248

# Add annotation tags

1249

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

1250

for tag in if_tag.getElementsByTagName(typ):

1251

annots = dict()

1252

for name, prop in (self.

1253

_get_all_dbus_things(typ)):

1254

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

1255

and prop._dbus_interface

1256

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

1257

annots.update(getattr(

1258

prop, "_dbus_annotations", {}))

1259

for name, value in annots.items():

1260

ann_tag = document.createElement(

1261

"annotation")

1262

ann_tag.setAttribute("name", name)

1263

ann_tag.setAttribute("value", value)

1264

tag.appendChild(ann_tag)

1265

# Add interface annotation tags

1266

for annotation, value in dict(

1267

itertools.chain.from_iterable(

1268

annotations().items()

1269

for name, annotations

1270

in self._get_all_dbus_things("interface")

1271

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

1272

)).items():

1273

ann_tag = document.createElement("annotation")

1274

ann_tag.setAttribute("name", annotation)

1275

ann_tag.setAttribute("value", value)

1276

if_tag.appendChild(ann_tag)

1277

# Fix argument name for the Introspect method itself

1278

if (if_tag.getAttribute("name")

1279

== dbus.INTROSPECTABLE_IFACE):

1280

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

1281

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

1282

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

1283

if (arg.getAttribute("direction")

1284

== "out"):

1285

arg.setAttribute("name",

1286

"xml_data")

1287

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

1288

document.unlink()

1289

except (AttributeError, xml.dom.DOMException,

1290

xml.parsers.expat.ExpatError) as error:

1291

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

1292

exc_info=error)

1293

return xmlstring

1294

1295

1296

class DBusObjectWithProperties(DBusObjectWithAnnotations):

1297

"""A D-Bus object with properties.

1298

1299

Classes inheriting from this can use the dbus_service_property

1300

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

1301

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

1302

"""

1303

893

inspect.getmembers(cls,

894

self._is_dbus_thing(thing)))

895

1304

896

def _get_dbus_property(self, interface_name, property_name):

1305

897

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

1306

898

property with the specified name and interface.

1307

899

"""

1308

for cls in self.__class__.__mro__:

1309

for name, value in inspect.getmembers(

1310

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

900

for cls in self.__class__.__mro__:

901

for name, value in (inspect.getmembers

902

(cls,

903

self._is_dbus_thing("property"))):

1311

904

if (value._dbus_name == property_name

1312

905

and value._dbus_interface == interface_name):

1313

906

return value.__get__(self)

1314

907

1315

908

# No such property

1316

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

1317

self.dbus_object_path, interface_name, property_name))

1318

1319

@classmethod

1320

def _get_all_interface_names(cls):

1321

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

1322

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

1323

"_dbus_interface", None)

1324

for x in (inspect.getmro(cls))

1325

for attr in dir(x))

1326

if name is not None)

1327

1328

@dbus.service.method(dbus.PROPERTIES_IFACE,

1329

in_signature="ss",

909

raise DBusPropertyNotFound(self.dbus_object_path + ":"

910

+ interface_name + "."

911

+ property_name)

912

913

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

1330

914

out_signature="v")

1331

915

def Get(self, interface_name, property_name):

1332

916

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

1338

922

if not hasattr(value, "variant_level"):

1339

923

return value

1340

924

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

1341

925

1342

926

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

1343

927

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

1344

928

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

1350

934

# The byte_arrays option is not supported yet on

1351

935

# signatures other than "ay".

1352

936

if prop._dbus_signature != "ay":

1353

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

1354

"'ay' signature {!r}"

1355

.format(prop._dbus_signature))

937

raise ValueError

1356

938

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

1357

939

for byte in value))

1358

940

prop(value)

1359

1360

@dbus.service.method(dbus.PROPERTIES_IFACE,

1361

in_signature="s",

941

942

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

1362

943

out_signature="a{sv}")

1363

944

def GetAll(self, interface_name):

1364

945

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

1365

946

standard.

1366

947

1367

948

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

1368

949

"""

1369

950

properties = {}

1379

960

if not hasattr(value, "variant_level"):

1380

961

properties[name] = value

1381

962

continue

1382

properties[name] = type(value)(

1383

value, variant_level=value.variant_level + 1)

963

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

964

value.variant_level+1)

1384

965

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

1385

1386

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

1387

def PropertiesChanged(self, interface_name, changed_properties,

1388

invalidated_properties):

1389

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

1390

standard.

1391

"""

1392

pass

1393

966

1394

967

@dbus.service.method(dbus.INTROSPECTABLE_IFACE,

1395

968

out_signature="s",

1396

969

path_keyword='object_path',

1397

970

connection_keyword='connection')

1398

971

def Introspect(self, object_path, connection):

1399

972

"""Overloading of standard D-Bus method.

1400

973

1401

974

Inserts property tags and interface annotation tags.

1402

975

"""

1403

xmlstring = DBusObjectWithAnnotations.Introspect(self,

1404

object_path,

1405

connection)

976

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

977

connection)

1406

978

try:

1407

979

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

1408

1409

980

def make_tag(document, name, prop):

1410

981

e = document.createElement("property")

1411

982

e.setAttribute("name", name)

1412

983

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

1413

984

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

1414

985

return e

1415

1416

986

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

1417

987

# Add property tags

1418

988

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

1421

991

if prop._dbus_interface

1422

992

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

1423

993

if_tag.appendChild(tag)

1424

# Add annotation tags for properties

1425

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

1426

annots = dict()

1427

for name, prop in self._get_all_dbus_things(

1428

"property"):

1429

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

1430

and prop._dbus_interface

1431

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

1432

annots.update(getattr(

1433

prop, "_dbus_annotations", {}))

1434

for name, value in annots.items():

1435

ann_tag = document.createElement(

1436

"annotation")

1437

ann_tag.setAttribute("name", name)

1438

ann_tag.setAttribute("value", value)

1439

tag.appendChild(ann_tag)

994

# Add annotation tags

995

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

996

for tag in if_tag.getElementsByTagName(typ):

997

annots = dict()

998

for name, prop in (self.

999

_get_all_dbus_things(typ)):

1000

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

1001

and prop._dbus_interface

1002

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

1003

annots.update(getattr

1004

(prop,

1005

"_dbus_annotations",

1006

{}))

1007

for name, value in annots.iteritems():

1008

ann_tag = document.createElement(

1009

"annotation")

1010

ann_tag.setAttribute("name", name)

1011

ann_tag.setAttribute("value", value)

1012

tag.appendChild(ann_tag)

1013

# Add interface annotation tags

1014

for annotation, value in dict(

1015

itertools.chain.from_iterable(

1016

annotations().iteritems()

1017

for name, annotations in

1018

self._get_all_dbus_things("interface")

1019

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

1020

)).iteritems():

1021

ann_tag = document.createElement("annotation")

1022

ann_tag.setAttribute("name", annotation)

1023

ann_tag.setAttribute("value", value)

1024

if_tag.appendChild(ann_tag)

1440

1025

# Add the names to the return values for the

1441

1026

# "org.freedesktop.DBus.Properties" methods

1442

1027

if (if_tag.getAttribute("name")

1460

1045

exc_info=error)

1461

1046

return xmlstring

1462

1047

1463

try:

1464

dbus.OBJECT_MANAGER_IFACE

1465

except AttributeError:

1466

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

1467

1468

1469

class DBusObjectWithObjectManager(DBusObjectWithAnnotations):

1470

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

1471

1472

Classes inheriting from this exposes the standard

1473

GetManagedObjects call and the InterfacesAdded and

1474

InterfacesRemoved signals on the standard

1475

"org.freedesktop.DBus.ObjectManager" interface.

1476

1477

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

1478

manually.

1479

"""

1480

@dbus.service.method(dbus.OBJECT_MANAGER_IFACE,

1481

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

1482

def GetManagedObjects(self):

1483

"""This function must be overridden"""

1484

raise NotImplementedError()

1485

1486

@dbus.service.signal(dbus.OBJECT_MANAGER_IFACE,

1487

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

1488

def InterfacesAdded(self, object_path, interfaces_and_properties):

1489

pass

1490

1491

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

1492

def InterfacesRemoved(self, object_path, interfaces):

1493

pass

1494

1495

@dbus.service.method(dbus.INTROSPECTABLE_IFACE,

1496

out_signature="s",

1497

path_keyword='object_path',

1498

connection_keyword='connection')

1499

def Introspect(self, object_path, connection):

1500

"""Overloading of standard D-Bus method.

1501

1502

Override return argument name of GetManagedObjects to be

1503

"objpath_interfaces_and_properties"

1504

"""

1505

xmlstring = DBusObjectWithAnnotations.Introspect(self,

1506

object_path,

1507

connection)

1508

try:

1509

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

1510

1511

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

1512

# Fix argument name for the GetManagedObjects method

1513

if (if_tag.getAttribute("name")

1514

== dbus.OBJECT_MANAGER_IFACE):

1515

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

1516

if (cn.getAttribute("name")

1517

== "GetManagedObjects"):

1518

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

1519

if (arg.getAttribute("direction")

1520

== "out"):

1521

arg.setAttribute(

1522

"name",

1523

"objpath_interfaces"

1524

"_and_properties")

1525

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

1526

document.unlink()

1527

except (AttributeError, xml.dom.DOMException,

1528

xml.parsers.expat.ExpatError) as error:

1529

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

1530

exc_info=error)

1531

return xmlstring

1532

1533

1048

1534

1049

def datetime_to_dbus(dt, variant_level=0):

1535

1050

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

1536

1051

if dt is None:

1537

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

1538

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

1052

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

1053

return dbus.String(dt.isoformat(),

1054

variant_level=variant_level)

1539

1055

1540

1056

1541

1057

def alternate_dbus_interfaces(alt_interface_names, deprecate=True):

1543

1059

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

1544

1060

interface names according to the "alt_interface_names" mapping.

1545

1061

Usage:

1546

1062

1547

1063

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

1548

1064

"net.example.AlternateInterface"})

1549

1065

class SampleDBusObject(dbus.service.Object):

1550

1066

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

1551

1067

def SampleDBusMethod():

1552

1068

pass

1553

1069

1554

1070

The above "SampleDBusMethod" on "SampleDBusObject" will be

1555

1071

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

1556

1072

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

1557

1073

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

1558

1074

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

1559

1075

1560

1076

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

1561

1077

(from DBusObjectWithProperties) and interfaces (from the

1562

1078

dbus_interface_annotations decorator).

1563

1079

"""

1564

1565

1080

def wrapper(cls):

1566

1081

for orig_interface_name, alt_interface_name in (

1567

alt_interface_names.items()):

1082

alt_interface_names.iteritems()):

1568

1083

attr = {}

1569

1084

interface_names = set()

1570

1085

# Go though all attributes of the class

1572

1087

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

1573

1088

# with the wrong interface name

1574

1089

if (not hasattr(attribute, "_dbus_interface")

1575

or not attribute._dbus_interface.startswith(

1576

orig_interface_name)):

1090

or not attribute._dbus_interface

1091

.startswith(orig_interface_name)):

1577

1092

continue

1578

1093

# Create an alternate D-Bus interface name based on

1579

1094

# the current name

1580

alt_interface = attribute._dbus_interface.replace(

1581

orig_interface_name, alt_interface_name)

1095

alt_interface = (attribute._dbus_interface

1096

.replace(orig_interface_name,

1097

alt_interface_name))

1582

1098

interface_names.add(alt_interface)

1583

1099

# Is this a D-Bus signal?

1584

1100

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

1585

1101

# Extract the original non-method undecorated

1586

1102

# function by black magic

1587

if sys.version_info.major == 2:

1588

nonmethod_func = (dict(

1103

nonmethod_func = (dict(

1589

1104

zip(attribute.func_code.co_freevars,

1590

attribute.__closure__))

1591

["func"].cell_contents)

1592

else:

1593

nonmethod_func = (dict(

1594

zip(attribute.__code__.co_freevars,

1595

attribute.__closure__))

1596

["func"].cell_contents)

1105

attribute.__closure__))["func"]

1106

.cell_contents)

1597

1107

# Create a new, but exactly alike, function

1598

1108

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

1599

1109

# with the alternate D-Bus interface name

1600

new_function = copy_function(nonmethod_func)

1601

new_function = (dbus.service.signal(

1602

alt_interface,

1603

attribute._dbus_signature)(new_function))

1110

new_function = (dbus.service.signal

1111

(alt_interface,

1112

attribute._dbus_signature)

1113

(types.FunctionType(

1114

nonmethod_func.func_code,

1115

nonmethod_func.func_globals,

1116

nonmethod_func.func_name,

1117

nonmethod_func.func_defaults,

1118

nonmethod_func.func_closure)))

1604

1119

# Copy annotations, if any

1605

1120

try:

1606

new_function._dbus_annotations = dict(

1607

attribute._dbus_annotations)

1121

new_function._dbus_annotations = (

1122

dict(attribute._dbus_annotations))

1608

1123

except AttributeError:

1609

1124

pass

1610

1611

1125

# Define a creator of a function to call both the

1612

1126

# original and alternate functions, so both the

1613

1127

# original and alternate signals gets sent when

1616

1130

"""This function is a scope container to pass

1617

1131

func1 and func2 to the "call_both" function

1618

1132

outside of its arguments"""

1619

1620

@functools.wraps(func2)

1621

1133

def call_both(*args, **kwargs):

1622

1134

"""This function will emit two D-Bus

1623

1135

signals by calling func1 and func2"""

1624

1136

func1(*args, **kwargs)

1625

1137

func2(*args, **kwargs)

1626

# Make wrapper function look like a D-Bus

1627

# signal

1628

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

1629

if name.startswith("_dbus_"):

1630

setattr(call_both, name, attr)

1631

1632

1138

return call_both

1633

1139

# Create the "call_both" function and add it to

1634

1140

# the class

1639

1145

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

1640

1146

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

1641

1147

# to the class.

1642

attr[attrname] = (

1643

dbus.service.method(

1644

alt_interface,

1645

attribute._dbus_in_signature,

1646

attribute._dbus_out_signature)

1647

(copy_function(attribute)))

1148

attr[attrname] = (dbus.service.method

1149

(alt_interface,

1150

attribute._dbus_in_signature,

1151

attribute._dbus_out_signature)

1152

(types.FunctionType

1153

(attribute.func_code,

1154

attribute.func_globals,

1155

attribute.func_name,

1156

attribute.func_defaults,

1157

attribute.func_closure)))

1648

1158

# Copy annotations, if any

1649

1159

try:

1650

attr[attrname]._dbus_annotations = dict(

1651

attribute._dbus_annotations)

1160

attr[attrname]._dbus_annotations = (

1161

dict(attribute._dbus_annotations))

1652

1162

except AttributeError:

1653

1163

pass

1654

1164

# Is this a D-Bus property?

1657

1167

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

1658

1168

# property with the alternate D-Bus interface

1659

1169

# name. Add it to the class.

1660

attr[attrname] = (dbus_service_property(

1661

alt_interface, attribute._dbus_signature,

1662

attribute._dbus_access,

1663

attribute._dbus_get_args_options

1664

["byte_arrays"])

1665

(copy_function(attribute)))

1170

attr[attrname] = (dbus_service_property

1171

(alt_interface,

1172

attribute._dbus_signature,

1173

attribute._dbus_access,

1174

attribute

1175

._dbus_get_args_options

1176

["byte_arrays"])

1177

(types.FunctionType

1178

(attribute.func_code,

1179

attribute.func_globals,

1180

attribute.func_name,

1181

attribute.func_defaults,

1182

attribute.func_closure)))

1666

1183

# Copy annotations, if any

1667

1184

try:

1668

attr[attrname]._dbus_annotations = dict(

1669

attribute._dbus_annotations)

1185

attr[attrname]._dbus_annotations = (

1186

dict(attribute._dbus_annotations))

1670

1187

except AttributeError:

1671

1188

pass

1672

1189

# Is this a D-Bus interface?

1675

1192

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

1676

1193

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

1677

1194

# to the class.

1678

attr[attrname] = (

1679

dbus_interface_annotations(alt_interface)

1680

(copy_function(attribute)))

1195

attr[attrname] = (dbus_interface_annotations

1196

(alt_interface)

1197

(types.FunctionType

1198

(attribute.func_code,

1199

attribute.func_globals,

1200

attribute.func_name,

1201

attribute.func_defaults,

1202

attribute.func_closure)))

1681

1203

if deprecate:

1682

1204

# Deprecate all alternate interfaces

1683

iname = "_AlternateDBusNames_interface_annotation{}"

1205

iname="_AlternateDBusNames_interface_annotation{0}"

1684

1206

for interface_name in interface_names:

1685

1686

1207

@dbus_interface_annotations(interface_name)

1687

1208

def func(self):

1688

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

1689

"true"}

1209

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

1210

"true" }

1690

1211

# Find an unused name

1691

1212

for aname in (iname.format(i)

1692

1213

for i in itertools.count()):

1696

1217

if interface_names:

1697

1218

# Replace the class with a new subclass of it with

1698

1219

# methods, signals, etc. as created above.

1699

if sys.version_info.major == 2:

1700

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

1701

(cls, ), attr)

1702

else:

1703

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

1704

(cls, ), attr)

1220

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

1221

(cls,), attr)

1705

1222

return cls

1706

1707

1223

return wrapper

1708

1224

1709

1225

1710

1226

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

1711

"se.bsnet.fukt.Mandos"})

1227

"se.bsnet.fukt.Mandos"})

1712

1228

class ClientDBus(Client, DBusObjectWithProperties):

1713

1229

"""A Client class using D-Bus

1714

1230

1715

1231

Attributes:

1716

1232

dbus_object_path: dbus.ObjectPath

1717

1233

bus: dbus.SystemBus()

1718

1234

"""

1719

1235

1720

1236

runtime_expansions = (Client.runtime_expansions

1721

+ ("dbus_object_path", ))

1722

1723

_interface = "se.recompile.Mandos.Client"

1724

1237

+ ("dbus_object_path",))

1238

1725

1239

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

1726

1727

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

1240

1241

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

1728

1242

self.bus = bus

1729

1243

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

1730

1244

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

1731

1245

# the D-Bus

1732

client_object_name = str(self.name).translate(

1246

client_object_name = unicode(self.name).translate(

1733

1247

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

1734

1248

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

1735

self.dbus_object_path = dbus.ObjectPath(

1736

"/clients/" + client_object_name)

1249

self.dbus_object_path = (dbus.ObjectPath

1250

("/clients/" + client_object_name))

1737

1251

DBusObjectWithProperties.__init__(self, self.bus,

1738

1252

self.dbus_object_path)

1739

1740

def notifychangeproperty(transform_func, dbus_name,

1741

type_func=lambda x: x,

1742

variant_level=1,

1743

invalidate_only=False,

1744

_interface=_interface):

1253

1254

def notifychangeproperty(transform_func,

1255

dbus_name, type_func=lambda x: x,

1256

variant_level=1):

1745

1257

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

1746

1258

its changes to DBus.

1747

1259

1748

1260

transform_fun: Function that takes a value and a variant_level

1749

1261

and transforms it to a D-Bus type.

1750

1262

dbus_name: D-Bus name of the variable

1752

1264

to the D-Bus. Default: no transform

1753

1265

variant_level: D-Bus variant level. Default: 1

1754

1266

"""

1755

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

1756

1267

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

1757

1268

def setter(self, value):

1758

1269

if hasattr(self, "dbus_object_path"):

1759

1270

if (not hasattr(self, attrname) or

1760

1271

type_func(getattr(self, attrname, None))

1761

1272

!= type_func(value)):

1762

if invalidate_only:

1763

self.PropertiesChanged(

1764

_interface, dbus.Dictionary(),

1765

dbus.Array((dbus_name, )))

1766

else:

1767

dbus_value = transform_func(

1768

type_func(value),

1769

variant_level=variant_level)

1770

self.PropertyChanged(dbus.String(dbus_name),

1771

dbus_value)

1772

self.PropertiesChanged(

1773

_interface,

1774

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

1775

dbus_value}),

1776

dbus.Array())

1273

dbus_value = transform_func(type_func(value),

1274

variant_level

1275

=variant_level)

1276

self.PropertyChanged(dbus.String(dbus_name),

1277

dbus_value)

1777

1278

setattr(self, attrname, value)

1778

1279

1779

1280

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

1780

1281

1781

1282

expires = notifychangeproperty(datetime_to_dbus, "Expires")

1782

1283

approvals_pending = notifychangeproperty(dbus.Boolean,

1783

1284

"ApprovalPending",

1784

type_func=bool)

1285

type_func = bool)

1785

1286

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

1786

1287

last_enabled = notifychangeproperty(datetime_to_dbus,

1787

1288

"LastEnabled")

1788

checker = notifychangeproperty(

1789

dbus.Boolean, "CheckerRunning",

1790

type_func=lambda checker: checker is not None)

1289

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

1290

type_func = lambda checker:

1291

checker is not None)

1791

1292

last_checked_ok = notifychangeproperty(datetime_to_dbus,

1792

1293

"LastCheckedOK")

1793

1294

last_checker_status = notifychangeproperty(dbus.Int16,

1796

1297

datetime_to_dbus, "LastApprovalRequest")

1797

1298

approved_by_default = notifychangeproperty(dbus.Boolean,

1798

1299

"ApprovedByDefault")

1799

approval_delay = notifychangeproperty(

1800

dbus.UInt64, "ApprovalDelay",

1801

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

1300

approval_delay = notifychangeproperty(dbus.UInt64,

1301

"ApprovalDelay",

1302

type_func =

1303

timedelta_to_milliseconds)

1802

1304

approval_duration = notifychangeproperty(

1803

1305

dbus.UInt64, "ApprovalDuration",

1804

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

1306

type_func = timedelta_to_milliseconds)

1805

1307

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

1806

timeout = notifychangeproperty(

1807

dbus.UInt64, "Timeout",

1808

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

1308

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

1309

type_func =

1310

timedelta_to_milliseconds)

1809

1311

extended_timeout = notifychangeproperty(

1810

1312

dbus.UInt64, "ExtendedTimeout",

1811

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

1812

interval = notifychangeproperty(

1813

dbus.UInt64, "Interval",

1814

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

1313

type_func = timedelta_to_milliseconds)

1314

interval = notifychangeproperty(dbus.UInt64,

1315

"Interval",

1316

type_func =

1317

timedelta_to_milliseconds)

1815

1318

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

1816

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

1817

invalidate_only=True)

1818

1319

1819

1320

del notifychangeproperty

1820

1321

1821

1322

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

1822

1323

try:

1823

1324

self.remove_from_connection()

1826

1327

if hasattr(DBusObjectWithProperties, "__del__"):

1827

1328

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

1828

1329

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

1829

1830

def checker_callback(self, source, condition,

1831

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

1832

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

1833

connection, command, *args,

1834

**kwargs)

1835

exitstatus = self.last_checker_status

1836

if exitstatus >= 0:

1330

1331

def checker_callback(self, pid, condition, command,

1332

*args, **kwargs):

1333

self.checker_callback_tag = None

1334

self.checker = None

1335

if os.WIFEXITED(condition):

1336

exitstatus = os.WEXITSTATUS(condition)

1837

1337

# Emit D-Bus signal

1838

1338

self.CheckerCompleted(dbus.Int16(exitstatus),

1839

# This is specific to GNU libC

1840

dbus.Int64(exitstatus << 8),

1339

dbus.Int64(condition),

1841

1340

dbus.String(command))

1842

1341

else:

1843

1342

# Emit D-Bus signal

1844

1343

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

1845

dbus.Int64(

1846

# This is specific to GNU libC

1847

(exitstatus << 8)

1848

| self.last_checker_signal),

1344

dbus.Int64(condition),

1849

1345

dbus.String(command))

1850

return ret

1851

1346

1347

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

1348

*args, **kwargs)

1349

1852

1350

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

1853

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

1351

old_checker = self.checker

1352

if self.checker is not None:

1353

old_checker_pid = self.checker.pid

1354

else:

1355

old_checker_pid = None

1854

1356

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

1855

1357

# Only if new checker process was started

1856

1358

if (self.checker is not None

1858

1360

# Emit D-Bus signal

1859

1361

self.CheckerStarted(self.current_checker_command)

1860

1362

return r

1861

1363

1862

1364

def _reset_approved(self):

1863

1365

self.approved = None

1864

1366

return False

1865

1367

1866

1368

def approve(self, value=True):

1867

1369

self.approved = value

1868

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

1869

* 1000), self._reset_approved)

1370

gobject.timeout_add(timedelta_to_milliseconds

1371

(self.approval_duration),

1372

self._reset_approved)

1870

1373

self.send_changedstate()

1871

1872

# D-Bus methods, signals & properties

1873

1874

# Interfaces

1875

1876

# Signals

1877

1374

1375

## D-Bus methods, signals & properties

1376

_interface = "se.recompile.Mandos.Client"

1377

1378

## Interfaces

1379

1380

@dbus_interface_annotations(_interface)

1381

def _foo(self):

1382

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

1383

"false"}

1384

1385

## Signals

1386

1878

1387

# CheckerCompleted - signal

1879

1388

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

1880

1389

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

1881

1390

"D-Bus signal"

1882

1391

pass

1883

1392

1884

1393

# CheckerStarted - signal

1885

1394

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

1886

1395

def CheckerStarted(self, command):

1887

1396

"D-Bus signal"

1888

1397

pass

1889

1398

1890

1399

# PropertyChanged - signal

1891

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

1892

1400

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

1893

1401

def PropertyChanged(self, property, value):

1894

1402

"D-Bus signal"

1895

1403

pass

1896

1404

1897

1405

# GotSecret - signal

1898

1406

@dbus.service.signal(_interface)

1899

1407

def GotSecret(self):

1902

1410

server to mandos-client

1903

1411

"""

1904

1412

pass

1905

1413

1906

1414

# Rejected - signal

1907

1415

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

1908

1416

def Rejected(self, reason):

1909

1417

"D-Bus signal"

1910

1418

pass

1911

1419

1912

1420

# NeedApproval - signal

1913

1421

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

1914

1422

def NeedApproval(self, timeout, default):

1915

1423

"D-Bus signal"

1916

1424

return self.need_approval()

1917

1918

# Methods

1919

1425

1426

## Methods

1427

1920

1428

# Approve - method

1921

1429

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

1922

1430

def Approve(self, value):

1923

1431

self.approve(value)

1924

1432

1925

1433

# CheckedOK - method

1926

1434

@dbus.service.method(_interface)

1927

1435

def CheckedOK(self):

1928

1436

self.checked_ok()

1929

1437

1930

1438

# Enable - method

1931

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

1932

1439

@dbus.service.method(_interface)

1933

1440

def Enable(self):

1934

1441

"D-Bus method"

1935

1442

self.enable()

1936

1443

1937

1444

# StartChecker - method

1938

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

1939

1445

@dbus.service.method(_interface)

1940

1446

def StartChecker(self):

1941

1447

"D-Bus method"

1942

1448

self.start_checker()

1943

1449

1944

1450

# Disable - method

1945

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

1946

1451

@dbus.service.method(_interface)

1947

1452

def Disable(self):

1948

1453

"D-Bus method"

1949

1454

self.disable()

1950

1455

1951

1456

# StopChecker - method

1952

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

1953

1457

@dbus.service.method(_interface)

1954

1458

def StopChecker(self):

1955

1459

self.stop_checker()

1956

1957

# Properties

1958

1460

1461

## Properties

1462

1959

1463

# ApprovalPending - property

1960

1464

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

1961

1465

def ApprovalPending_dbus_property(self):

1962

1466

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

1963

1467

1964

1468

# ApprovedByDefault - property

1965

@dbus_service_property(_interface,

1966

signature="b",

1469

@dbus_service_property(_interface, signature="b",

1967

1470

access="readwrite")

1968

1471

def ApprovedByDefault_dbus_property(self, value=None):

1969

1472

if value is None: # get

1970

1473

return dbus.Boolean(self.approved_by_default)

1971

1474

self.approved_by_default = bool(value)

1972

1475

1973

1476

# ApprovalDelay - property

1974

@dbus_service_property(_interface,

1975

signature="t",

1477

@dbus_service_property(_interface, signature="t",

1976

1478

access="readwrite")

1977

1479

def ApprovalDelay_dbus_property(self, value=None):

1978

1480

if value is None: # get

1979

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

1980

* 1000)

1481

return dbus.UInt64(self.approval_delay_milliseconds())

1981

1482

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

1982

1483

1983

1484

# ApprovalDuration - property

1984

@dbus_service_property(_interface,

1985

signature="t",

1485

@dbus_service_property(_interface, signature="t",

1986

1486

access="readwrite")

1987

1487

def ApprovalDuration_dbus_property(self, value=None):

1988

1488

if value is None: # get

1989

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

1990

* 1000)

1489

return dbus.UInt64(timedelta_to_milliseconds(

1490

self.approval_duration))

1991

1491

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

1992

1492

1993

1493

# Name - property

1994

@dbus_annotations(

1995

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

1996

1494

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

1997

1495

def Name_dbus_property(self):

1998

1496

return dbus.String(self.name)

1999

1497

2000

1498

# Fingerprint - property

2001

@dbus_annotations(

2002

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

2003

1499

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

2004

1500

def Fingerprint_dbus_property(self):

2005

1501

return dbus.String(self.fingerprint)

2006

1502

2007

1503

# Host - property

2008

@dbus_service_property(_interface,

2009

signature="s",

1504

@dbus_service_property(_interface, signature="s",

2010

1505

access="readwrite")

2011

1506

def Host_dbus_property(self, value=None):

2012

1507

if value is None: # get

2013

1508

return dbus.String(self.host)

2014

self.host = str(value)

2015

1509

self.host = unicode(value)

1510

2016

1511

# Created - property

2017

@dbus_annotations(

2018

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

2019

1512

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

2020

1513

def Created_dbus_property(self):

2021

1514

return datetime_to_dbus(self.created)

2022

1515

2023

1516

# LastEnabled - property

2024

1517

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

2025

1518

def LastEnabled_dbus_property(self):

2026

1519

return datetime_to_dbus(self.last_enabled)

2027

1520

2028

1521

# Enabled - property

2029

@dbus_service_property(_interface,

2030

signature="b",

1522

@dbus_service_property(_interface, signature="b",

2031

1523

access="readwrite")

2032

1524

def Enabled_dbus_property(self, value=None):

2033

1525

if value is None: # get

2036

1528

self.enable()

2037

1529

else:

2038

1530

self.disable()

2039

1531

2040

1532

# LastCheckedOK - property

2041

@dbus_service_property(_interface,

2042

signature="s",

1533

@dbus_service_property(_interface, signature="s",

2043

1534

access="readwrite")

2044

1535

def LastCheckedOK_dbus_property(self, value=None):

2045

1536

if value is not None:

2046

1537

self.checked_ok()

2047

1538

return

2048

1539

return datetime_to_dbus(self.last_checked_ok)

2049

1540

2050

1541

# LastCheckerStatus - property

2051

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

1542

@dbus_service_property(_interface, signature="n",

1543

access="read")

2052

1544

def LastCheckerStatus_dbus_property(self):

2053

1545

return dbus.Int16(self.last_checker_status)

2054

1546

2055

1547

# Expires - property

2056

1548

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

2057

1549

def Expires_dbus_property(self):

2058

1550

return datetime_to_dbus(self.expires)

2059

1551

2060

1552

# LastApprovalRequest - property

2061

1553

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

2062

1554

def LastApprovalRequest_dbus_property(self):

2063

1555

return datetime_to_dbus(self.last_approval_request)

2064

1556

2065

1557

# Timeout - property

2066

@dbus_service_property(_interface,

2067

signature="t",

1558

@dbus_service_property(_interface, signature="t",

2068

1559

access="readwrite")

2069

1560

def Timeout_dbus_property(self, value=None):

2070

1561

if value is None: # get

2071

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

1562

return dbus.UInt64(self.timeout_milliseconds())

2072

1563

old_timeout = self.timeout

2073

1564

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

2074

1565

# Reschedule disabling

2082

1573

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

2083

1574

is None):

2084

1575

return

2085

GLib.source_remove(self.disable_initiator_tag)

2086

self.disable_initiator_tag = GLib.timeout_add(

2087

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

2088

self.disable)

2089

1576

gobject.source_remove(self.disable_initiator_tag)

1577

self.disable_initiator_tag = (

1578

gobject.timeout_add(

1579

timedelta_to_milliseconds(self.expires - now),

1580

self.disable))

1581

2090

1582

# ExtendedTimeout - property

2091

@dbus_service_property(_interface,

2092

signature="t",

1583

@dbus_service_property(_interface, signature="t",

2093

1584

access="readwrite")

2094

1585

def ExtendedTimeout_dbus_property(self, value=None):

2095

1586

if value is None: # get

2096

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

2097

* 1000)

1587

return dbus.UInt64(self.extended_timeout_milliseconds())

2098

1588

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

2099

1589

2100

1590

# Interval - property

2101

@dbus_service_property(_interface,

2102

signature="t",

1591

@dbus_service_property(_interface, signature="t",

2103

1592

access="readwrite")

2104

1593

def Interval_dbus_property(self, value=None):

2105

1594

if value is None: # get

2106

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

1595

return dbus.UInt64(self.interval_milliseconds())

2107

1596

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

2108

1597

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

2109

1598

return

2110

1599

if self.enabled:

2111

1600

# Reschedule checker run

2112

GLib.source_remove(self.checker_initiator_tag)

2113

self.checker_initiator_tag = GLib.timeout_add(

2114

value, self.start_checker)

2115

self.start_checker() # Start one now, too

2116

1601

gobject.source_remove(self.checker_initiator_tag)

1602

self.checker_initiator_tag = (gobject.timeout_add

1603

(value, self.start_checker))

1604

self.start_checker() # Start one now, too

1605

2117

1606

# Checker - property

2118

@dbus_service_property(_interface,

2119

signature="s",

1607

@dbus_service_property(_interface, signature="s",

2120

1608

access="readwrite")

2121

1609

def Checker_dbus_property(self, value=None):

2122

1610

if value is None: # get

2123

1611

return dbus.String(self.checker_command)

2124

self.checker_command = str(value)

2125

1612

self.checker_command = unicode(value)

1613

2126

1614

# CheckerRunning - property

2127

@dbus_service_property(_interface,

2128

signature="b",

1615

@dbus_service_property(_interface, signature="b",

2129

1616

access="readwrite")

2130

1617

def CheckerRunning_dbus_property(self, value=None):

2131

1618

if value is None: # get

2134

1621

self.start_checker()

2135

1622

else:

2136

1623

self.stop_checker()

2137

1624

2138

1625

# ObjectPath - property

2139

@dbus_annotations(

2140

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

2141

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

2142

1626

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

2143

1627

def ObjectPath_dbus_property(self):

2144

return self.dbus_object_path # is already a dbus.ObjectPath

2145

1628

return self.dbus_object_path # is already a dbus.ObjectPath

1629

2146

1630

# Secret = property

2147

@dbus_annotations(

2148

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

2149

"invalidates"})

2150

@dbus_service_property(_interface,

2151

signature="ay",

2152

access="write",

2153

byte_arrays=True)

1631

@dbus_service_property(_interface, signature="ay",

1632

access="write", byte_arrays=True)

2154

1633

def Secret_dbus_property(self, value):

2155

self.secret = bytes(value)

2156

1634

self.secret = str(value)

1635

2157

1636

del _interface

2158

1637

2159

1638

2162

1641

self._pipe = child_pipe

2163

1642

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

2164

1643

if not self._pipe.recv():

2165

raise KeyError(fpr)

2166

1644

raise KeyError()

1645

2167

1646

def __getattribute__(self, name):

2168

1647

if name == '_pipe':

2169

1648

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

2172

1651

if data[0] == 'data':

2173

1652

return data[1]

2174

1653

if data[0] == 'function':

2175

2176

1654

def func(*args, **kwargs):

2177

1655

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

2178

1656

return self._pipe.recv()[1]

2179

2180

1657

return func

2181

1658

2182

1659

def __setattr__(self, name, value):

2183

1660

if name == '_pipe':

2184

1661

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

2187

1664

2188

1665

class ClientHandler(socketserver.BaseRequestHandler, object):

2189

1666

"""A class to handle client connections.

2190

1667

2191

1668

Instantiated once for each connection to handle it.

2192

1669

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

2193

1670

2194

1671

def handle(self):

2195

1672

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

2196

1673

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

2197

str(self.client_address))

1674

unicode(self.client_address))

2198

1675

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

2199

1676

self.server.child_pipe.fileno())

2200

2201

session = gnutls.ClientSession(self.request)

2202

2203

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

2204

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

2205

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

2206

# "+DHE-DSS"))

1677

1678

session = (gnutls.connection

1679

.ClientSession(self.request,

1680

gnutls.connection

1681

.X509Credentials()))

1682

1683

# Note: gnutls.connection.X509Credentials is really a

1684

# generic GnuTLS certificate credentials object so long as

1685

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

1686

# here despite using OpenPGP certificates.

1687

1688

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

1689

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

1690

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

1691

# "+DHE-DSS"))

2207

1692

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

2208

1693

priority = self.server.gnutls_priority

2209

1694

if priority is None:

2210

1695

priority = "NORMAL"

2211

gnutls.priority_set_direct(session._c_object,

2212

priority.encode("utf-8"),

2213

None)

2214

1696

(gnutls.library.functions

1697

.gnutls_priority_set_direct(session._c_object,

1698

priority, None))

1699

2215

1700

# Start communication using the Mandos protocol

2216

1701

# Get protocol number

2217

1702

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

2222

1707

except (ValueError, IndexError, RuntimeError) as error:

2223

1708

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

2224

1709

return

2225

1710

2226

1711

# Start GnuTLS connection

2227

1712

try:

2228

1713

session.handshake()

2229

except gnutls.Error as error:

1714

except gnutls.errors.GNUTLSError as error:

2230

1715

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

2231

1716

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

2232

1717

# established. Just abandon the request.

2233

1718

return

2234

1719

logger.debug("Handshake succeeded")

2235

1720

2236

1721

approval_required = False

2237

1722

try:

2238

1723

try:

2239

fpr = self.fingerprint(

2240

self.peer_certificate(session))

2241

except (TypeError, gnutls.Error) as error:

1724

fpr = self.fingerprint(self.peer_certificate

1725

(session))

1726

except (TypeError,

1727

gnutls.errors.GNUTLSError) as error:

2242

1728

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

2243

1729

return

2244

1730

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

2245

1731

2246

1732

try:

2247

1733

client = ProxyClient(child_pipe, fpr,

2248

1734

self.client_address)

2249

1735

except KeyError:

2250

1736

return

2251

1737

2252

1738

if client.approval_delay:

2253

1739

delay = client.approval_delay

2254

1740

client.approvals_pending += 1

2255

1741

approval_required = True

2256

1742

2257

1743

while True:

2258

1744

if not client.enabled:

2259

1745

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

2260

client.name)

1746

client.name)

2261

1747

if self.server.use_dbus:

2262

1748

# Emit D-Bus signal

2263

1749

client.Rejected("Disabled")

2264

1750

return

2265

1751

2266

1752

if client.approved or not client.approval_delay:

2267

# We are approved or approval is disabled

1753

#We are approved or approval is disabled

2268

1754

break

2269

1755

elif client.approved is None:

2270

1756

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

2272

1758

if self.server.use_dbus:

2273

1759

# Emit D-Bus signal

2274

1760

client.NeedApproval(

2275

client.approval_delay.total_seconds()

2276

* 1000, client.approved_by_default)

1761

client.approval_delay_milliseconds(),

1762

client.approved_by_default)

2277

1763

else:

2278

1764

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

2279

1765

client.name)

2281

1767

# Emit D-Bus signal

2282

1768

client.Rejected("Denied")

2283

1769

return

2284

2285

# wait until timeout or approved

1770

1771

#wait until timeout or approved

2286

1772

time = datetime.datetime.now()

2287

1773

client.changedstate.acquire()

2288

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

1774

client.changedstate.wait(

1775

float(timedelta_to_milliseconds(delay)

1776

/ 1000))

2289

1777

client.changedstate.release()

2290

1778

time2 = datetime.datetime.now()

2291

1779

if (time2 - time) >= delay:

2301

1789

break

2302

1790

else:

2303

1791

delay -= time2 - time

2304

2305

try:

2306

session.send(client.secret)

2307

except gnutls.Error as error:

2308

logger.warning("gnutls send failed",

2309

exc_info=error)

2310

return

2311

1792

1793

sent_size = 0

1794

while sent_size < len(client.secret):

1795

try:

1796

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

1797

except gnutls.errors.GNUTLSError as error:

1798

logger.warning("gnutls send failed",

1799

exc_info=error)

1800

return

1801

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

1802

sent, len(client.secret)

1803

- (sent_size + sent))

1804

sent_size += sent

1805

2312

1806

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

2313

1807

# bump the timeout using extended_timeout

2314

1808

client.bump_timeout(client.extended_timeout)

2315

1809

if self.server.use_dbus:

2316

1810

# Emit D-Bus signal

2317

1811

client.GotSecret()

2318

1812

2319

1813

finally:

2320

1814

if approval_required:

2321

1815

client.approvals_pending -= 1

2322

1816

try:

2323

1817

session.bye()

2324

except gnutls.Error as error:

1818

except gnutls.errors.GNUTLSError as error:

2325

1819

logger.warning("GnuTLS bye failed",

2326

1820

exc_info=error)

2327

1821

2328

1822

@staticmethod

2329

1823

def peer_certificate(session):

2330

1824

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

2331

1825

# If not an OpenPGP certificate...

2332

if (gnutls.certificate_type_get(session._c_object)

2333

!= gnutls.CRT_OPENPGP):

2334

# ...return invalid data

2335

return b""

1826

if (gnutls.library.functions

1827

.gnutls_certificate_type_get(session._c_object)

1828

!= gnutls.library.constants.GNUTLS_CRT_OPENPGP):

1829

# ...do the normal thing

1830

return session.peer_certificate

2336

1831

list_size = ctypes.c_uint(1)

2337

cert_list = (gnutls.certificate_get_peers

1832

cert_list = (gnutls.library.functions

1833

.gnutls_certificate_get_peers

2338

1834

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

2339

1835

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

2340

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

1836

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

1837

" certificate")

2341

1838

if list_size.value == 0:

2342

1839

return None

2343

1840

cert = cert_list[0]

2344

1841

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

2345

1842

2346

1843

@staticmethod

2347

1844

def fingerprint(openpgp):

2348

1845

"Convert an OpenPGP bytestring to a hexdigit fingerprint"

2349

1846

# New GnuTLS "datum" with the OpenPGP public key

2350

datum = gnutls.datum_t(

2351

ctypes.cast(ctypes.c_char_p(openpgp),

2352

ctypes.POINTER(ctypes.c_ubyte)),

2353

ctypes.c_uint(len(openpgp)))

1847

datum = (gnutls.library.types

1848

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

1849

ctypes.POINTER

1850

(ctypes.c_ubyte)),

1851

ctypes.c_uint(len(openpgp))))

2354

1852

# New empty GnuTLS certificate

2355

crt = gnutls.openpgp_crt_t()

2356

gnutls.openpgp_crt_init(ctypes.byref(crt))

1853

crt = gnutls.library.types.gnutls_openpgp_crt_t()

1854

(gnutls.library.functions

1855

.gnutls_openpgp_crt_init(ctypes.byref(crt)))

2357

1856

# Import the OpenPGP public key into the certificate

2358

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

2359

gnutls.OPENPGP_FMT_RAW)

1857

(gnutls.library.functions

1858

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

1859

gnutls.library.constants

1860

.GNUTLS_OPENPGP_FMT_RAW))

2360

1861

# Verify the self signature in the key

2361

1862

crtverify = ctypes.c_uint()

2362

gnutls.openpgp_crt_verify_self(crt, 0,

2363

ctypes.byref(crtverify))

1863

(gnutls.library.functions

1864

.gnutls_openpgp_crt_verify_self(crt, 0,

1865

ctypes.byref(crtverify)))

2364

1866

if crtverify.value != 0:

2365

gnutls.openpgp_crt_deinit(crt)

2366

raise gnutls.CertificateSecurityError("Verify failed")

1867

gnutls.library.functions.gnutls_openpgp_crt_deinit(crt)

1868

raise (gnutls.errors.CertificateSecurityError

1869

("Verify failed"))

2367

1870

# New buffer for the fingerprint

2368

1871

buf = ctypes.create_string_buffer(20)

2369

1872

buf_len = ctypes.c_size_t()

2370

1873

# Get the fingerprint from the certificate into the buffer

2371

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

2372

ctypes.byref(buf_len))

1874

(gnutls.library.functions

1875

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

1876

ctypes.byref(buf_len)))

2373

1877

# Deinit the certificate

2374

gnutls.openpgp_crt_deinit(crt)

1878

gnutls.library.functions.gnutls_openpgp_crt_deinit(crt)

2375

1879

# Convert the buffer to a Python bytestring

2376

1880

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

2377

1881

# Convert the bytestring to hexadecimal notation

2381

1885

2382

1886

class MultiprocessingMixIn(object):

2383

1887

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

2384

2385

1888

def sub_process_main(self, request, address):

2386

1889

try:

2387

1890

self.finish_request(request, address)

2388

1891

except Exception:

2389

1892

self.handle_error(request, address)

2390

1893

self.close_request(request)

2391

1894

2392

1895

def process_request(self, request, address):

2393

1896

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

2394

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

2395

args=(request, address))

1897

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

1898

args = (request, address))

2396

1899

proc.start()

2397

1900

return proc

2398

1901

2399

1902

2400

1903

class MultiprocessingMixInWithPipe(MultiprocessingMixIn, object):

2401

1904

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

2402

2403

1905

def process_request(self, request, client_address):

2404

1906

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

2405

1907

2406

1908

This function creates a new pipe in self.pipe

2407

1909

"""

2408

1910

parent_pipe, self.child_pipe = multiprocessing.Pipe()

2409

1911

2410

1912

proc = MultiprocessingMixIn.process_request(self, request,

2411

1913

client_address)

2412

1914

self.child_pipe.close()

2413

1915

self.add_pipe(parent_pipe, proc)

2414

1916

2415

1917

def add_pipe(self, parent_pipe, proc):

2416

1918

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

2417

1919

raise NotImplementedError()

2420

1922

class IPv6_TCPServer(MultiprocessingMixInWithPipe,

2421

1923

socketserver.TCPServer, object):

2422

1924

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

2423

1925

2424

1926

Attributes:

2425

1927

enabled: Boolean; whether this server is activated yet

2426

1928

interface: None or a network interface name (string)

2427

1929

use_ipv6: Boolean; to use IPv6 or not

2428

1930

"""

2429

2430

1931

def __init__(self, server_address, RequestHandlerClass,

2431

interface=None,

2432

use_ipv6=True,

2433

socketfd=None):

1932

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

2434

1933

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

2435

1934

creating a new one with socket.socket().

2436

1935

"""

2442

1941

self.socketfd = socketfd

2443

1942

# Save the original socket.socket() function

2444

1943

self.socket_socket = socket.socket

2445

2446

1944

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

2447

#

1945

#

2448

1946

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

2449

1947

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

2450

1948

# patching socket.socket.)

2451

#

1949

#

2452

1950

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

2453

1951

@functools.wraps(socket.socket)

2454

1952

def socket_wrapper(*args, **kwargs):

2466

1964

# socket_wrapper(), if socketfd was set.

2467

1965

socketserver.TCPServer.__init__(self, server_address,

2468

1966

RequestHandlerClass)

2469

1967

2470

1968

def server_bind(self):

2471

1969

"""This overrides the normal server_bind() function

2472

1970

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

2473

1971

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

2474

global SO_BINDTODEVICE

2475

1972

if self.interface is not None:

2476

1973

if SO_BINDTODEVICE is None:

2477

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

2478

# common enough.

2479

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

2480

SO_BINDTODEVICE = 25

2481

try:

2482

self.socket.setsockopt(

2483

socket.SOL_SOCKET, SO_BINDTODEVICE,

2484

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

2485

except socket.error as error:

2486

if error.errno == errno.EPERM:

2487

logger.error("No permission to bind to"

2488

" interface %s", self.interface)

2489

elif error.errno == errno.ENOPROTOOPT:

2490

logger.error("SO_BINDTODEVICE not available;"

2491

" cannot bind to interface %s",

2492

self.interface)

2493

elif error.errno == errno.ENODEV:

2494

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

2495

" cannot bind", self.interface)

2496

else:

2497

raise

1974

logger.error("SO_BINDTODEVICE does not exist;"

1975

" cannot bind to interface %s",

1976

self.interface)

1977

else:

1978

try:

1979

self.socket.setsockopt(socket.SOL_SOCKET,

1980

SO_BINDTODEVICE,

1981

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

1982

except socket.error as error:

1983

if error.errno == errno.EPERM:

1984

logger.error("No permission to bind to"

1985

" interface %s", self.interface)

1986

elif error.errno == errno.ENOPROTOOPT:

1987

logger.error("SO_BINDTODEVICE not available;"

1988

" cannot bind to interface %s",

1989

self.interface)

1990

elif error.errno == errno.ENODEV:

1991

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

1992

" cannot bind", self.interface)

1993

else:

1994

raise

2498

1995

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

2499

1996

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

2500

1997

if not self.server_address[0]:

2501

1998

if self.address_family == socket.AF_INET6:

2502

any_address = "::" # in6addr_any

1999

any_address = "::" # in6addr_any

2503

2000

else:

2504

any_address = "0.0.0.0" # INADDR_ANY

2001

any_address = "0.0.0.0" # INADDR_ANY

2505

2002

self.server_address = (any_address,

2506

2003

self.server_address[1])

2507

2004

elif not self.server_address[1]:

2508

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

2005

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

2006

0)

2509

2007

# if self.interface:

2510

2008

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

2511

2009

# 0, # port

2517

2015

2518

2016

class MandosServer(IPv6_TCPServer):

2519

2017

"""Mandos server.

2520

2018

2521

2019

Attributes:

2522

2020

clients: set of Client objects

2523

2021

gnutls_priority GnuTLS priority string

2524

2022

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

2525

2526

Assumes a GLib.MainLoop event loop.

2023

2024

Assumes a gobject.MainLoop event loop.

2527

2025

"""

2528

2529

2026

def __init__(self, server_address, RequestHandlerClass,

2530

interface=None,

2531

use_ipv6=True,

2532

clients=None,

2533

gnutls_priority=None,

2534

use_dbus=True,

2535

socketfd=None):

2027

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

2028

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

2536

2029

self.enabled = False

2537

2030

self.clients = clients

2538

2031

if self.clients is None:

2541

2034

self.gnutls_priority = gnutls_priority

2542

2035

IPv6_TCPServer.__init__(self, server_address,

2543

2036

RequestHandlerClass,

2544

interface=interface,

2545

use_ipv6=use_ipv6,

2546

socketfd=socketfd)

2547

2037

interface = interface,

2038

use_ipv6 = use_ipv6,

2039

socketfd = socketfd)

2548

2040

def server_activate(self):

2549

2041

if self.enabled:

2550

2042

return socketserver.TCPServer.server_activate(self)

2551

2043

2552

2044

def enable(self):

2553

2045

self.enabled = True

2554

2046

2555

2047

def add_pipe(self, parent_pipe, proc):

2556

2048

# Call "handle_ipc" for both data and EOF events

2557

GLib.io_add_watch(

2558

parent_pipe.fileno(),

2559

GLib.IO_IN | GLib.IO_HUP,

2560

functools.partial(self.handle_ipc,

2561

parent_pipe=parent_pipe,

2562

proc=proc))

2563

2564

def handle_ipc(self, source, condition,

2565

parent_pipe=None,

2566

proc=None,

2567

client_object=None):

2049

gobject.io_add_watch(parent_pipe.fileno(),

2050

gobject.IO_IN | gobject.IO_HUP,

2051

functools.partial(self.handle_ipc,

2052

parent_pipe =

2053

parent_pipe,

2054

proc = proc))

2055

2056

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

2057

proc = None, client_object=None):

2568

2058

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

2569

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

2059

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

2570

2060

# Wait for other process to exit

2571

2061

proc.join()

2572

2062

return False

2573

2063

2574

2064

# Read a request from the child

2575

2065

request = parent_pipe.recv()

2576

2066

command = request[0]

2577

2067

2578

2068

if command == 'init':

2579

2069

fpr = request[1]

2580

2070

address = request[2]

2581

2582

for c in self.clients.values():

2071

2072

for c in self.clients.itervalues():

2583

2073

if c.fingerprint == fpr:

2584

2074

client = c

2585

2075

break

2592

2082

address[0])

2593

2083

parent_pipe.send(False)

2594

2084

return False

2595

2596

GLib.io_add_watch(

2597

parent_pipe.fileno(),

2598

GLib.IO_IN | GLib.IO_HUP,

2599

functools.partial(self.handle_ipc,

2600

parent_pipe=parent_pipe,

2601

proc=proc,

2602

client_object=client))

2085

2086

gobject.io_add_watch(parent_pipe.fileno(),

2087

gobject.IO_IN | gobject.IO_HUP,

2088

functools.partial(self.handle_ipc,

2089

parent_pipe =

2090

parent_pipe,

2091

proc = proc,

2092

client_object =

2093

client))

2603

2094

parent_pipe.send(True)

2604

2095

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

2605

2096

# same fileno

2608

2099

funcname = request[1]

2609

2100

args = request[2]

2610

2101

kwargs = request[3]

2611

2102

2612

2103

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

2613

2104

funcname)(*args,

2614

**kwargs)))

2615

2105

**kwargs)))

2106

2616

2107

if command == 'getattr':

2617

2108

attrname = request[1]

2618

if isinstance(client_object.__getattribute__(attrname),

2619

collections.Callable):

2620

parent_pipe.send(('function', ))

2109

if callable(client_object.__getattribute__(attrname)):

2110

parent_pipe.send(('function',))

2621

2111

else:

2622

parent_pipe.send((

2623

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

2624

2112

parent_pipe.send(('data', client_object

2113

.__getattribute__(attrname)))

2114

2625

2115

if command == 'setattr':

2626

2116

attrname = request[1]

2627

2117

value = request[2]

2628

2118

setattr(client_object, attrname, value)

2629

2119

2630

2120

return True

2631

2121

2632

2122

2633

2123

def rfc3339_duration_to_delta(duration):

2634

2124

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

2635

2125

2636

2126

>>> rfc3339_duration_to_delta("P7D")

2637

2127

datetime.timedelta(7)

2638

2128

>>> rfc3339_duration_to_delta("PT60S")

2648

2138

>>> rfc3339_duration_to_delta("P1DT3M20S")

2649

2139

datetime.timedelta(1, 200)

2650

2140

"""

2651

2141

2652

2142

# Parsing an RFC 3339 duration with regular expressions is not

2653

2143

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

2654

2144

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

2655

2145

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

2656

2146

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

2657

2147

# avoid excessive use of external libraries.

2658

2148

2659

2149

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

2660

Token = collections.namedtuple("Token", (

2661

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

2662

# a "group" containing digits

2663

"value", # datetime.timedelta or None

2664

"followers")) # Tokens valid after this token

2150

Token = collections.namedtuple("Token",

2151

("regexp", # To match token; if

2152

# "value" is not None,

2153

# must have a "group"

2154

# containing digits

2155

"value", # datetime.timedelta or

2156

# None

2157

"followers")) # Tokens valid after

2158

# this token

2665

2159

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

2666

2160

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

2667

2161

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

2668

2162

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

2669

2163

datetime.timedelta(seconds=1),

2670

frozenset((token_end, )))

2164

frozenset((token_end,)))

2671

2165

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

2672

2166

datetime.timedelta(minutes=1),

2673

2167

frozenset((token_second, token_end)))

2689

2183

frozenset((token_month, token_end)))

2690

2184

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

2691

2185

datetime.timedelta(weeks=1),

2692

frozenset((token_end, )))

2186

frozenset((token_end,)))

2693

2187

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

2694

2188

frozenset((token_year, token_month,

2695

2189

token_day, token_time,

2696

token_week)))

2697

# Define starting values:

2698

# Value so far

2699

value = datetime.timedelta()

2190

token_week))),

2191

# Define starting values

2192

value = datetime.timedelta() # Value so far

2700

2193

found_token = None

2701

# Following valid tokens

2702

followers = frozenset((token_duration, ))

2703

# String left to parse

2704

s = duration

2194

followers = frozenset(token_duration,) # Following valid tokens

2195

s = duration # String left to parse

2705

2196

# Loop until end token is found

2706

2197

while found_token is not token_end:

2707

2198

# Search for any currently valid tokens

2723

2214

break

2724

2215

else:

2725

2216

# No currently valid tokens were found

2726

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

2727

.format(duration))

2217

raise ValueError("Invalid RFC 3339 duration")

2728

2218

# End token found

2729

2219

return value

2730

2220

2731

2221

2732

2222

def string_to_delta(interval):

2733

2223

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

2734

2224

2735

2225

>>> string_to_delta('7d')

2736

2226

datetime.timedelta(7)

2737

2227

>>> string_to_delta('60s')

2745

2235

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

2746

2236

datetime.timedelta(0, 330)

2747

2237

"""

2748

2238

2749

2239

try:

2750

2240

return rfc3339_duration_to_delta(interval)

2751

2241

except ValueError:

2752

2242

pass

2753

2243

2754

2244

timevalue = datetime.timedelta(0)

2755

2245

for s in interval.split():

2756

2246

try:

2757

suffix = s[-1]

2247

suffix = unicode(s[-1])

2758

2248

value = int(s[:-1])

2759

2249

if suffix == "d":

2760

2250

delta = datetime.timedelta(value)

2767

2257

elif suffix == "w":

2768

2258

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

2769

2259

else:

2770

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

2260

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

2261

.format(suffix))

2771

2262

except IndexError as e:

2772

2263

raise ValueError(*(e.args))

2773

2264

timevalue += delta

2774

2265

return timevalue

2775

2266

2776

2267

2777

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

2268

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

2778

2269

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

2779

2270

2780

2271

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

2781

2272

if os.fork():

2782

2273

sys.exit()

2790

2281

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

2791

2282

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

2792

2283

raise OSError(errno.ENODEV,

2793

"{} not a character device"

2284

"{0} not a character device"

2794

2285

.format(os.devnull))

2795

2286

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

2796

2287

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

2800

2291

2801

2292

2802

2293

def main():

2803

2294

2804

2295

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

2805

2296

# Parsing of options, both command line and config file

2806

2297

2807

2298

parser = argparse.ArgumentParser()

2808

2299

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

2809

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

2300

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

2810

2301

help="show version number and exit")

2811

2302

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

2812

2303

help="Bind to interface IF")

2845

2336

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

2846

2337

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

2847

2338

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

2848

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

2849

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

2850

default=None)

2851

2339

2852

2340

options = parser.parse_args()

2853

2341

2854

2342

if options.check:

2855

2343

import doctest

2856

fail_count, test_count = doctest.testmod()

2857

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

2858

2344

doctest.testmod()

2345

sys.exit()

2346

2859

2347

# Default values for config file for server-global settings

2860

server_defaults = {"interface": "",

2861

"address": "",

2862

"port": "",

2863

"debug": "False",

2864

"priority":

2865

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

2866

":+SIGN-DSA-SHA256",

2867

"servicename": "Mandos",

2868

"use_dbus": "True",

2869

"use_ipv6": "True",

2870

"debuglevel": "",

2871

"restore": "True",

2872

"socket": "",

2873

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

2874

"foreground": "False",

2875

"zeroconf": "True",

2876

}

2877

2348

server_defaults = { "interface": "",

2349

"address": "",

2350

"port": "",

2351

"debug": "False",

2352

"priority":

2353

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

2354

"servicename": "Mandos",

2355

"use_dbus": "True",

2356

"use_ipv6": "True",

2357

"debuglevel": "",

2358

"restore": "True",

2359

"socket": "",

2360

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

2361

"foreground": "False",

2362

}

2363

2878

2364

# Parse config file for server-global settings

2879

2365

server_config = configparser.SafeConfigParser(server_defaults)

2880

2366

del server_defaults

2881

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

2367

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

2368

"mandos.conf"))

2882

2369

# Convert the SafeConfigParser object to a dict

2883

2370

server_settings = server_config.defaults()

2884

2371

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

2898

2385

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

2899

2386

["socket"])

2900

2387

del server_config

2901

2388

2902

2389

# Override the settings from the config file with command line

2903

2390

# options, if set.

2904

2391

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

2905

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

2906

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

2907

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

2392

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

2393

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

2394

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

2908

2395

value = getattr(options, option)

2909

2396

if value is not None:

2910

2397

server_settings[option] = value

2911

2398

del options

2912

2399

# Force all strings to be unicode

2913

2400

for option in server_settings.keys():

2914

if isinstance(server_settings[option], bytes):

2915

server_settings[option] = (server_settings[option]

2916

.decode("utf-8"))

2401

if type(server_settings[option]) is str:

2402

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

2917

2403

# Force all boolean options to be boolean

2918

2404

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

2919

"foreground", "zeroconf"):

2405

"foreground"):

2920

2406

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

2921

2407

# Debug implies foreground

2922

2408

if server_settings["debug"]:

2923

2409

server_settings["foreground"] = True

2924

2410

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

2925

2411

2926

2412

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

2927

2928

if (not server_settings["zeroconf"]

2929

and not (server_settings["port"]

2930

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

2931

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

2932

2413

2933

2414

# For convenience

2934

2415

debug = server_settings["debug"]

2935

2416

debuglevel = server_settings["debuglevel"]

2938

2419

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

2939

2420

stored_state_file)

2940

2421

foreground = server_settings["foreground"]

2941

zeroconf = server_settings["zeroconf"]

2942

2422

2943

2423

if debug:

2944

2424

initlogger(debug, logging.DEBUG)

2945

2425

else:

2948

2428

else:

2949

2429

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

2950

2430

initlogger(debug, level)

2951

2431

2952

2432

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

2953

syslogger.setFormatter(

2954

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

2955

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

2956

server_settings["servicename"])))

2957

2433

syslogger.setFormatter(logging.Formatter

2434

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

2435

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

2436

.format(server_settings

2437

["servicename"])))

2438

2958

2439

# Parse config file with clients

2959

2440

client_config = configparser.SafeConfigParser(Client

2960

2441

.client_defaults)

2961

2442

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

2962

2443

"clients.conf"))

2963

2444

2964

2445

global mandos_dbus_service

2965

2446

mandos_dbus_service = None

2966

2967

socketfd = None

2968

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

2969

socketfd = server_settings["socket"]

2970

tcp_server = MandosServer(

2971

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

2972

ClientHandler,

2973

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

2974

use_ipv6=use_ipv6,

2975

gnutls_priority=server_settings["priority"],

2976

use_dbus=use_dbus,

2977

socketfd=socketfd)

2447

2448

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

2449

server_settings["port"]),

2450

ClientHandler,

2451

interface=(server_settings["interface"]

2452

or None),

2453

use_ipv6=use_ipv6,

2454

gnutls_priority=

2455

server_settings["priority"],

2456

use_dbus=use_dbus,

2457

socketfd=(server_settings["socket"]

2458

or None))

2978

2459

if not foreground:

2979

2460

pidfilename = "/run/mandos.pid"

2980

2461

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

2981

2462

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

2982

2463

pidfile = None

2983

2464

try:

2984

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

2465

pidfile = open(pidfilename, "w")

2985

2466

except IOError as e:

2986

2467

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

2987

2468

exc_info=e)

2988

2989

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

2990

("mandos", "mandos"),

2991

("nobody", "nogroup")):

2469

2470

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

2992

2471

try:

2993

2472

uid = pwd.getpwnam(name).pw_uid

2994

gid = pwd.getpwnam(group).pw_gid

2473

gid = pwd.getpwnam(name).pw_gid

2995

2474

break

2996

2475

except KeyError:

2997

2476

continue

3001

2480

try:

3002

2481

os.setgid(gid)

3003

2482

os.setuid(uid)

3004

if debug:

3005

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

3006

gid))

3007

2483

except OSError as error:

3008

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

3009

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

3010

2484

if error.errno != errno.EPERM:

3011

2485

raise

3012

2486

3013

2487

if debug:

3014

2488

# Enable all possible GnuTLS debugging

3015

2489

3016

2490

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

3017

2491

# - GnuTLS manual

3018

gnutls.global_set_log_level(11)

3019

3020

@gnutls.log_func

2492

gnutls.library.functions.gnutls_global_set_log_level(11)

2493

2494

@gnutls.library.types.gnutls_log_func

3021

2495

def debug_gnutls(level, string):

3022

2496

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

3023

3024

gnutls.global_set_log_function(debug_gnutls)

3025

2497

2498

(gnutls.library.functions

2499

.gnutls_global_set_log_function(debug_gnutls))

2500

3026

2501

# Redirect stdin so all checkers get /dev/null

3027

2502

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

3028

2503

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

3029

2504

if null > 2:

3030

2505

os.close(null)

3031

2506

3032

2507

# Need to fork before connecting to D-Bus

3033

2508

if not foreground:

3034

2509

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

3035

2510

daemon()

3036

3037

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

3038

# to inform GLib that threads will be used.

3039

GLib.threads_init()

3040

2511

2512

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

2513

# need to inform gobject that threads will be used.

2514

gobject.threads_init()

2515

3041

2516

global main_loop

3042

2517

# From the Avahi example code

3043

2518

DBusGMainLoop(set_as_default=True)

3044

main_loop = GLib.MainLoop()

2519

main_loop = gobject.MainLoop()

3045

2520

bus = dbus.SystemBus()

3046

2521

# End of Avahi example code

3047

2522

if use_dbus:

3048

2523

try:

3049

2524

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

3050

bus,

3051

do_not_queue=True)

3052

old_bus_name = dbus.service.BusName(

3053

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

3054

do_not_queue=True)

3055

except dbus.exceptions.DBusException as e:

2525

bus, do_not_queue=True)

2526

old_bus_name = (dbus.service.BusName

2527

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

2528

do_not_queue=True))

2529

except dbus.exceptions.NameExistsException as e:

3056

2530

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

3057

2531

use_dbus = False

3058

2532

server_settings["use_dbus"] = False

3059

2533

tcp_server.use_dbus = False

3060

if zeroconf:

3061

protocol = avahi.PROTO_INET6 if use_ipv6 else avahi.PROTO_INET

3062

service = AvahiServiceToSyslog(

3063

name=server_settings["servicename"],

3064

servicetype="_mandos._tcp",

3065

protocol=protocol,

3066

bus=bus)

3067

if server_settings["interface"]:

3068

service.interface = if_nametoindex(

3069

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

3070

2534

protocol = avahi.PROTO_INET6 if use_ipv6 else avahi.PROTO_INET

2535

service = AvahiServiceToSyslog(name =

2536

server_settings["servicename"],

2537

servicetype = "_mandos._tcp",

2538

protocol = protocol, bus = bus)

2539

if server_settings["interface"]:

2540

service.interface = (if_nametoindex

2541

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

2542

3071

2543

global multiprocessing_manager

3072

2544

multiprocessing_manager = multiprocessing.Manager()

3073

2545

3074

2546

client_class = Client

3075

2547

if use_dbus:

3076

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

3077

2548

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

2549

3078

2550

client_settings = Client.config_parser(client_config)

3079

2551

old_client_settings = {}

3080

2552

clients_data = {}

3081

2553

3082

2554

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

3083

2555

global wnull

3084

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

2556

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

3085

2557

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

3086

2558

# mode

3087

2559

if debug or not foreground:

3088

2560

wnull.close()

3089

2561

3090

2562

# Get client data and settings from last running state.

3091

2563

if server_settings["restore"]:

3092

2564

try:

3093

2565

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

3094

if sys.version_info.major == 2:

3095

clients_data, old_client_settings = pickle.load(

3096

stored_state)

3097

else:

3098

bytes_clients_data, bytes_old_client_settings = (

3099

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

3100

# Fix bytes to strings

3101

# clients_data

3102

# .keys()

3103

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

3104

if isinstance(key, bytes)

3105

else key): value

3106

for key, value in

3107

bytes_clients_data.items()}

3108

del bytes_clients_data

3109

for key in clients_data:

3110

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

3111

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

3112

for k, v in

3113

clients_data[key].items()}

3114

clients_data[key] = value

3115

# .client_structure

3116

value["client_structure"] = [

3117

(s.decode("utf-8")

3118

if isinstance(s, bytes)

3119

else s) for s in

3120

value["client_structure"]]

3121

# .name & .host

3122

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

3123

if isinstance(value[k], bytes):

3124

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

3125

# old_client_settings

3126

# .keys()

3127

old_client_settings = {

3128

(key.decode("utf-8")

3129

if isinstance(key, bytes)

3130

else key): value

3131

for key, value in

3132

bytes_old_client_settings.items()}

3133

del bytes_old_client_settings

3134

# .host

3135

for value in old_client_settings.values():

3136

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

3137

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

3138

.decode("utf-8"))

2566

clients_data, old_client_settings = (pickle.load

2567

(stored_state))

3139

2568

os.remove(stored_state_path)

3140

2569

except IOError as e:

3141

2570

if e.errno == errno.ENOENT:

3142

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

3143

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

2571

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

2572

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

3144

2573

else:

3145

2574

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

3146

2575

exc_info=e)

3147

2576

raise

3148

2577

except EOFError as e:

3149

2578

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

3150

"EOFError:",

3151

exc_info=e)

3152

2579

"EOFError:", exc_info=e)

2580

3153

2581

with PGPEngine() as pgp:

3154

for client_name, client in clients_data.items():

2582

for client_name, client in clients_data.iteritems():

3155

2583

# Skip removed clients

3156

2584

if client_name not in client_settings:

3157

2585

continue

3158

2586

3159

2587

# Decide which value to use after restoring saved state.

3160

2588

# We have three different values: Old config file,

3161

2589

# new config file, and saved state.

3166

2594

# For each value in new config, check if it

3167

2595

# differs from the old config value (Except for

3168

2596

# the "secret" attribute)

3169

if (name != "secret"

3170

and (value !=

3171

old_client_settings[client_name][name])):

2597

if (name != "secret" and

2598

value != old_client_settings[client_name]

2599

[name]):

3172

2600

client[name] = value

3173

2601

except KeyError:

3174

2602

pass

3175

2603

3176

2604

# Clients who has passed its expire date can still be

3177

# enabled if its last checker was successful. A Client

2605

# enabled if its last checker was successful. Clients

3178

2606

# whose checker succeeded before we stored its state is

3179

2607

# assumed to have successfully run all checkers during

3180

2608

# downtime.

3182

2610

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

3183

2611

if not client["last_checked_ok"]:

3184

2612

logger.warning(

3185

"disabling client {} - Client never "

3186

"performed a successful checker".format(

3187

client_name))

2613

"disabling client {0} - Client never "

2614

"performed a successful checker"

2615

.format(client_name))

3188

2616

client["enabled"] = False

3189

2617

elif client["last_checker_status"] != 0:

3190

2618

logger.warning(

3191

"disabling client {} - Client last"

3192

" checker failed with error code"

3193

" {}".format(

3194

client_name,

3195

client["last_checker_status"]))

2619

"disabling client {0} - Client "

2620

"last checker failed with error code {1}"

2621

.format(client_name,

2622

client["last_checker_status"]))

3196

2623

client["enabled"] = False

3197

2624

else:

3198

client["expires"] = (

3199

datetime.datetime.utcnow()

3200

+ client["timeout"])

2625

client["expires"] = (datetime.datetime

2626

.utcnow()

2627

+ client["timeout"])

3201

2628

logger.debug("Last checker succeeded,"

3202

" keeping {} enabled".format(

3203

client_name))

2629

" keeping {0} enabled"

2630

.format(client_name))

3204

2631

try:

3205

client["secret"] = pgp.decrypt(

3206

client["encrypted_secret"],

3207

client_settings[client_name]["secret"])

2632

client["secret"] = (

2633

pgp.decrypt(client["encrypted_secret"],

2634

client_settings[client_name]

2635

["secret"]))

3208

2636

except PGPError:

3209

2637

# If decryption fails, we use secret from new settings

3210

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

3211

client_name))

3212

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

3213

["secret"])

3214

2638

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

2639

.format(client_name))

2640

client["secret"] = (

2641

client_settings[client_name]["secret"])

2642

3215

2643

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

3216

2644

for client_name in (set(old_client_settings)

3217

2645

- set(client_settings)):

3219

2647

for client_name in (set(client_settings)

3220

2648

- set(old_client_settings)):

3221

2649

clients_data[client_name] = client_settings[client_name]

3222

2650

3223

2651

# Create all client objects

3224

for client_name, client in clients_data.items():

2652

for client_name, client in clients_data.iteritems():

3225

2653

tcp_server.clients[client_name] = client_class(

3226

name=client_name,

3227

settings=client,

3228

server_settings=server_settings)

3229

2654

name = client_name, settings = client,

2655

server_settings = server_settings)

2656

3230

2657

if not tcp_server.clients:

3231

2658

logger.warning("No clients defined")

3232

2659

3233

2660

if not foreground:

3234

2661

if pidfile is not None:

3235

pid = os.getpid()

3236

2662

try:

3237

2663

with pidfile:

3238

print(pid, file=pidfile)

2664

pid = os.getpid()

2665

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

3239

2666

except IOError:

3240

2667

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

3241

2668

pidfilename, pid)

3242

2669

del pidfile

3243

2670

del pidfilename

3244

3245

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

3246

GLib.unix_signal_add(GLib.PRIORITY_HIGH, termsig,

3247

lambda: main_loop.quit() and False)

3248

2671

2672

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

2673

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

2674

3249

2675

if use_dbus:

3250

3251

@alternate_dbus_interfaces(

3252

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

3253

class MandosDBusService(DBusObjectWithObjectManager):

2676

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

2677

"se.bsnet.fukt.Mandos"})

2678

class MandosDBusService(DBusObjectWithProperties):

3254

2679

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

3255

3256

2680

def __init__(self):

3257

2681

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

3258

3259

2682

_interface = "se.recompile.Mandos"

3260

2683

2684

@dbus_interface_annotations(_interface)

2685

def _foo(self):

2686

return { "org.freedesktop.DBus.Property"

2687

".EmitsChangedSignal":

2688

"false"}

2689

3261

2690

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

3262

2691

def ClientAdded(self, objpath):

3263

2692

"D-Bus signal"

3264

2693

pass

3265

2694

3266

2695

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

3267

2696

def ClientNotFound(self, fingerprint, address):

3268

2697

"D-Bus signal"

3269

2698

pass

3270

3271

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

3272

"true"})

2699

3273

2700

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

3274

2701

def ClientRemoved(self, objpath, name):

3275

2702

"D-Bus signal"

3276

2703

pass

3277

3278

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

3279

"true"})

2704

3280

2705

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

3281

2706

def GetAllClients(self):

3282

2707

"D-Bus method"

3283

return dbus.Array(c.dbus_object_path for c in

3284

tcp_server.clients.values())

3285

3286

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

3287

"true"})

2708

return dbus.Array(c.dbus_object_path

2709

for c in

2710

tcp_server.clients.itervalues())

2711

3288

2712

@dbus.service.method(_interface,

3289

2713

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

3290

2714

def GetAllClientsWithProperties(self):

3291

2715

"D-Bus method"

3292

2716

return dbus.Dictionary(

3293

{c.dbus_object_path: c.GetAll(

3294

"se.recompile.Mandos.Client")

3295

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

2717

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

2718

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

3296

2719

signature="oa{sv}")

3297

2720

3298

2721

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

3299

2722

def RemoveClient(self, object_path):

3300

2723

"D-Bus method"

3301

for c in tcp_server.clients.values():

2724

for c in tcp_server.clients.itervalues():

3302

2725

if c.dbus_object_path == object_path:

3303

2726

del tcp_server.clients[c.name]

3304

2727

c.remove_from_connection()

3305

# Don't signal the disabling

2728

# Don't signal anything except ClientRemoved

3306

2729

c.disable(quiet=True)

3307

# Emit D-Bus signal for removal

3308

self.client_removed_signal(c)

2730

# Emit D-Bus signal

2731

self.ClientRemoved(object_path, c.name)

3309

2732

return

3310

2733

raise KeyError(object_path)

3311

2734

3312

2735

del _interface

3313

3314

@dbus.service.method(dbus.OBJECT_MANAGER_IFACE,

3315

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

3316

def GetManagedObjects(self):

3317

"""D-Bus method"""

3318

return dbus.Dictionary(

3319

{client.dbus_object_path:

3320

dbus.Dictionary(

3321

{interface: client.GetAll(interface)

3322

for interface in

3323

client._get_all_interface_names()})

3324

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

3325

3326

def client_added_signal(self, client):

3327

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

3328

if use_dbus:

3329

# New standard signal

3330

self.InterfacesAdded(

3331

client.dbus_object_path,

3332

dbus.Dictionary(

3333

{interface: client.GetAll(interface)

3334

for interface in

3335

client._get_all_interface_names()}))

3336

# Old signal

3337

self.ClientAdded(client.dbus_object_path)

3338

3339

def client_removed_signal(self, client):

3340

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

3341

if use_dbus:

3342

# New standard signal

3343

self.InterfacesRemoved(

3344

client.dbus_object_path,

3345

client._get_all_interface_names())

3346

# Old signal

3347

self.ClientRemoved(client.dbus_object_path,

3348

client.name)

3349

2736

3350

2737

mandos_dbus_service = MandosDBusService()

3351

3352

# Save modules to variables to exempt the modules from being

3353

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

3354

mp = multiprocessing

3355

wn = wnull

3356

2738

3357

2739

def cleanup():

3358

2740

"Cleanup function; run on exit"

3359

if zeroconf:

3360

service.cleanup()

3361

3362

mp.active_children()

3363

wn.close()

2741

service.cleanup()

2742

2743

multiprocessing.active_children()

2744

wnull.close()

3364

2745

if not (tcp_server.clients or client_settings):

3365

2746

return

3366

2747

3367

2748

# Store client before exiting. Secrets are encrypted with key

3368

2749

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

3369

2750

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

3370

2751

clients = {}

3371

2752

with PGPEngine() as pgp:

3372

for client in tcp_server.clients.values():

2753

for client in tcp_server.clients.itervalues():

3373

2754

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

3374

2755

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

3375

2756

key)

3376

2757

client_dict = {}

3377

2758

3378

2759

# A list of attributes that can not be pickled

3379

2760

# + secret.

3380

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

3381

"checker", "server_settings"}

3382

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

3383

.Object):

2761

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

2762

"checker", "server_settings"))

2763

for name, typ in (inspect.getmembers

2764

(dbus.service.Object)):

3384

2765

exclude.add(name)

3385

2766

3386

2767

client_dict["encrypted_secret"] = (client

3387

2768

.encrypted_secret)

3388

2769

for attr in client.client_structure:

3389

2770

if attr not in exclude:

3390

2771

client_dict[attr] = getattr(client, attr)

3391

2772

3392

2773

clients[client.name] = client_dict

3393

2774

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

3394

2775

3395

2776

try:

3396

with tempfile.NamedTemporaryFile(

3397

mode='wb',

3398

suffix=".pickle",

3399

prefix='clients-',

3400

dir=os.path.dirname(stored_state_path),

3401

delete=False) as stored_state:

3402

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

3403

protocol=2)

3404

tempname = stored_state.name

2777

with (tempfile.NamedTemporaryFile

2778

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

2779

dir=os.path.dirname(stored_state_path),

2780

delete=False)) as stored_state:

2781

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

2782

tempname=stored_state.name

3405

2783

os.rename(tempname, stored_state_path)

3406

2784

except (IOError, OSError) as e:

3407

2785

if not debug:

3410

2788

except NameError:

3411

2789

pass

3412

2790

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

3413

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

2791

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

3414

2792

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

3415

2793

else:

3416

2794

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

3417

2795

exc_info=e)

3418

2796

raise

3419

2797

3420

2798

# Delete all clients, and settings from config

3421

2799

while tcp_server.clients:

3422

2800

name, client = tcp_server.clients.popitem()

3423

2801

if use_dbus:

3424

2802

client.remove_from_connection()

3425

# Don't signal the disabling

2803

# Don't signal anything except ClientRemoved

3426

2804

client.disable(quiet=True)

3427

# Emit D-Bus signal for removal

3428

2805

if use_dbus:

3429

mandos_dbus_service.client_removed_signal(client)

2806

# Emit D-Bus signal

2807

mandos_dbus_service.ClientRemoved(client

2808

.dbus_object_path,

2809

client.name)

3430

2810

client_settings.clear()

3431

2811

3432

2812

atexit.register(cleanup)

3433

3434

for client in tcp_server.clients.values():

2813

2814

for client in tcp_server.clients.itervalues():

3435

2815

if use_dbus:

3436

# Emit D-Bus signal for adding

3437

mandos_dbus_service.client_added_signal(client)

2816

# Emit D-Bus signal

2817

mandos_dbus_service.ClientAdded(client.dbus_object_path)

3438

2818

# Need to initiate checking of clients

3439

2819

if client.enabled:

3440

2820

client.init_checker()

3441

2821

3442

2822

tcp_server.enable()

3443

2823

tcp_server.server_activate()

3444

2824

3445

2825

# Find out what port we got

3446

if zeroconf:

3447

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

2826

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

3448

2827

if use_ipv6:

3449

2828

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

3450

2829

" flowinfo %d, scope_id %d",

3452

2831

else: # IPv4

3453

2832

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

3454

2833

*tcp_server.socket.getsockname())

3455

3456

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

3457

2834

2835

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

2836

3458

2837

try:

3459

if zeroconf:

3460

# From the Avahi example code

3461

try:

3462

service.activate()

3463

except dbus.exceptions.DBusException as error:

3464

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

3465

cleanup()

3466

sys.exit(1)

3467

# End of Avahi example code

3468

3469

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

3470

lambda *args, **kwargs:

3471

(tcp_server.handle_request

3472

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

3473

2838

# From the Avahi example code

2839

try:

2840

service.activate()

2841

except dbus.exceptions.DBusException as error:

2842

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

2843

cleanup()

2844

sys.exit(1)

2845

# End of Avahi example code

2846

2847

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

2848

lambda *args, **kwargs:

2849

(tcp_server.handle_request

2850

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

2851

3474

2852

logger.debug("Starting main loop")

3475

2853

main_loop.run()

3476

2854

except AvahiError as error:

3485

2863

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

3486

2864

cleanup()

3487

2865

3488

3489

2866

if __name__ == '__main__':

3490

2867

main()