/mandos/trunk : revision 654

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 = "1.7.15"

89

SO_BINDTODEVICE = None

90

91

version = "1.6.3"

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.

1351

935

# signatures other than "ay".

1352

936

if prop._dbus_signature != "ay":

1353

937

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

1354

"'ay' signature {!r}"

938

"'ay' signature {0!r}"

1355

939

.format(prop._dbus_signature))

1356

940

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

1357

941

for byte in value))

1358

942

prop(value)

1359

1360

@dbus.service.method(dbus.PROPERTIES_IFACE,

1361

in_signature="s",

943

944

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

1362

945

out_signature="a{sv}")

1363

946

def GetAll(self, interface_name):

1364

947

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

1365

948

standard.

1366

949

1367

950

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

1368

951

"""

1369

952

properties = {}

1379

962

if not hasattr(value, "variant_level"):

1380

963

properties[name] = value

1381

964

continue

1382

properties[name] = type(value)(

1383

value, variant_level=value.variant_level + 1)

965

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

966

value.variant_level+1)

1384

967

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

968

1394

969

@dbus.service.method(dbus.INTROSPECTABLE_IFACE,

1395

970

out_signature="s",

1396

971

path_keyword='object_path',

1397

972

connection_keyword='connection')

1398

973

def Introspect(self, object_path, connection):

1399

974

"""Overloading of standard D-Bus method.

1400

975

1401

976

Inserts property tags and interface annotation tags.

1402

977

"""

1403

xmlstring = DBusObjectWithAnnotations.Introspect(self,

1404

object_path,

1405

connection)

978

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

979

connection)

1406

980

try:

1407

981

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

1408

1409

982

def make_tag(document, name, prop):

1410

983

e = document.createElement("property")

1411

984

e.setAttribute("name", name)

1412

985

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

1413

986

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

1414

987

return e

1415

1416

988

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

1417

989

# Add property tags

1418

990

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

1421

993

if prop._dbus_interface

1422

994

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

1423

995

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)

996

# Add annotation tags

997

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

998

for tag in if_tag.getElementsByTagName(typ):

999

annots = dict()

1000

for name, prop in (self.

1001

_get_all_dbus_things(typ)):

1002

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

1003

and prop._dbus_interface

1004

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

1005

annots.update(getattr

1006

(prop,

1007

"_dbus_annotations",

1008

{}))

1009

for name, value in annots.iteritems():

1010

ann_tag = document.createElement(

1011

"annotation")

1012

ann_tag.setAttribute("name", name)

1013

ann_tag.setAttribute("value", value)

1014

tag.appendChild(ann_tag)

1015

# Add interface annotation tags

1016

for annotation, value in dict(

1017

itertools.chain.from_iterable(

1018

annotations().iteritems()

1019

for name, annotations in

1020

self._get_all_dbus_things("interface")

1021

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

1022

)).iteritems():

1023

ann_tag = document.createElement("annotation")

1024

ann_tag.setAttribute("name", annotation)

1025

ann_tag.setAttribute("value", value)

1026

if_tag.appendChild(ann_tag)

1440

1027

# Add the names to the return values for the

1441

1028

# "org.freedesktop.DBus.Properties" methods

1442

1029

if (if_tag.getAttribute("name")

1461

1048

return xmlstring

1462

1049

1463

1050

1464

try:

1465

dbus.OBJECT_MANAGER_IFACE

1466

except AttributeError:

1467

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

1468

1469

1470

class DBusObjectWithObjectManager(DBusObjectWithAnnotations):

1471

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

1472

1473

Classes inheriting from this exposes the standard

1474

GetManagedObjects call and the InterfacesAdded and

1475

InterfacesRemoved signals on the standard

1476

"org.freedesktop.DBus.ObjectManager" interface.

1477

1478

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

1479

manually.

1480

"""

1481

@dbus.service.method(dbus.OBJECT_MANAGER_IFACE,

1482

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

1483

def GetManagedObjects(self):

1484

"""This function must be overridden"""

1485

raise NotImplementedError()

1486

1487

@dbus.service.signal(dbus.OBJECT_MANAGER_IFACE,

1488

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

1489

def InterfacesAdded(self, object_path, interfaces_and_properties):

1490

pass

1491

1492

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

1493

def InterfacesRemoved(self, object_path, interfaces):

1494

pass

1495

1496

@dbus.service.method(dbus.INTROSPECTABLE_IFACE,

1497

out_signature="s",

1498

path_keyword='object_path',

1499

connection_keyword='connection')

1500

def Introspect(self, object_path, connection):

1501

"""Overloading of standard D-Bus method.

1502

1503

Override return argument name of GetManagedObjects to be

1504

"objpath_interfaces_and_properties"

1505

"""

1506

xmlstring = DBusObjectWithAnnotations.Introspect(self,

1507

object_path,

1508

connection)

1509

try:

1510

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

1511

1512

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

1513

# Fix argument name for the GetManagedObjects method

1514

if (if_tag.getAttribute("name")

1515

== dbus.OBJECT_MANAGER_IFACE):

1516

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

1517

if (cn.getAttribute("name")

1518

== "GetManagedObjects"):

1519

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

1520

if (arg.getAttribute("direction")

1521

== "out"):

1522

arg.setAttribute(

1523

"name",

1524

"objpath_interfaces"

1525

"_and_properties")

1526

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

1527

document.unlink()

1528

except (AttributeError, xml.dom.DOMException,

1529

xml.parsers.expat.ExpatError) as error:

1530

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

1531

exc_info=error)

1532

return xmlstring

1533

1534

1535

1051

def datetime_to_dbus(dt, variant_level=0):

1536

1052

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

1537

1053

if dt is None:

1538

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

1539

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

1054

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

1055

return dbus.String(dt.isoformat(),

1056

variant_level=variant_level)

1540

1057

1541

1058

1542

1059

def alternate_dbus_interfaces(alt_interface_names, deprecate=True):

1544

1061

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

1545

1062

interface names according to the "alt_interface_names" mapping.

1546

1063

Usage:

1547

1064

1548

1065

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

1549

1066

"net.example.AlternateInterface"})

1550

1067

class SampleDBusObject(dbus.service.Object):

1551

1068

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

1552

1069

def SampleDBusMethod():

1553

1070

pass

1554

1071

1555

1072

The above "SampleDBusMethod" on "SampleDBusObject" will be

1556

1073

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

1557

1074

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

1558

1075

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

1559

1076

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

1560

1077

1561

1078

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

1562

1079

(from DBusObjectWithProperties) and interfaces (from the

1563

1080

dbus_interface_annotations decorator).

1564

1081

"""

1565

1566

1082

def wrapper(cls):

1567

1083

for orig_interface_name, alt_interface_name in (

1568

alt_interface_names.items()):

1084

alt_interface_names.iteritems()):

1569

1085

attr = {}

1570

1086

interface_names = set()

1571

1087

# Go though all attributes of the class

1573

1089

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

1574

1090

# with the wrong interface name

1575

1091

if (not hasattr(attribute, "_dbus_interface")

1576

or not attribute._dbus_interface.startswith(

1577

orig_interface_name)):

1092

or not attribute._dbus_interface

1093

.startswith(orig_interface_name)):

1578

1094

continue

1579

1095

# Create an alternate D-Bus interface name based on

1580

1096

# the current name

1581

alt_interface = attribute._dbus_interface.replace(

1582

orig_interface_name, alt_interface_name)

1097

alt_interface = (attribute._dbus_interface

1098

.replace(orig_interface_name,

1099

alt_interface_name))

1583

1100

interface_names.add(alt_interface)

1584

1101

# Is this a D-Bus signal?

1585

1102

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

1586

1103

# Extract the original non-method undecorated

1587

1104

# function by black magic

1588

if sys.version_info.major == 2:

1589

nonmethod_func = (dict(

1105

nonmethod_func = (dict(

1590

1106

zip(attribute.func_code.co_freevars,

1591

attribute.__closure__))

1592

["func"].cell_contents)

1593

else:

1594

nonmethod_func = (dict(

1595

zip(attribute.__code__.co_freevars,

1596

attribute.__closure__))

1597

["func"].cell_contents)

1107

attribute.__closure__))["func"]

1108

.cell_contents)

1598

1109

# Create a new, but exactly alike, function

1599

1110

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

1600

1111

# with the alternate D-Bus interface name

1601

new_function = copy_function(nonmethod_func)

1602

new_function = (dbus.service.signal(

1603

alt_interface,

1604

attribute._dbus_signature)(new_function))

1112

new_function = (dbus.service.signal

1113

(alt_interface,

1114

attribute._dbus_signature)

1115

(types.FunctionType(

1116

nonmethod_func.func_code,

1117

nonmethod_func.func_globals,

1118

nonmethod_func.func_name,

1119

nonmethod_func.func_defaults,

1120

nonmethod_func.func_closure)))

1605

1121

# Copy annotations, if any

1606

1122

try:

1607

new_function._dbus_annotations = dict(

1608

attribute._dbus_annotations)

1123

new_function._dbus_annotations = (

1124

dict(attribute._dbus_annotations))

1609

1125

except AttributeError:

1610

1126

pass

1611

1612

1127

# Define a creator of a function to call both the

1613

1128

# original and alternate functions, so both the

1614

1129

# original and alternate signals gets sent when

1617

1132

"""This function is a scope container to pass

1618

1133

func1 and func2 to the "call_both" function

1619

1134

outside of its arguments"""

1620

1621

@functools.wraps(func2)

1622

1135

def call_both(*args, **kwargs):

1623

1136

"""This function will emit two D-Bus

1624

1137

signals by calling func1 and func2"""

1625

1138

func1(*args, **kwargs)

1626

1139

func2(*args, **kwargs)

1627

# Make wrapper function look like a D-Bus

1628

# signal

1629

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

1630

if name.startswith("_dbus_"):

1631

setattr(call_both, name, attr)

1632

1633

1140

return call_both

1634

1141

# Create the "call_both" function and add it to

1635

1142

# the class

1640

1147

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

1641

1148

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

1642

1149

# to the class.

1643

attr[attrname] = (

1644

dbus.service.method(

1645

alt_interface,

1646

attribute._dbus_in_signature,

1647

attribute._dbus_out_signature)

1648

(copy_function(attribute)))

1150

attr[attrname] = (dbus.service.method

1151

(alt_interface,

1152

attribute._dbus_in_signature,

1153

attribute._dbus_out_signature)

1154

(types.FunctionType

1155

(attribute.func_code,

1156

attribute.func_globals,

1157

attribute.func_name,

1158

attribute.func_defaults,

1159

attribute.func_closure)))

1649

1160

# Copy annotations, if any

1650

1161

try:

1651

attr[attrname]._dbus_annotations = dict(

1652

attribute._dbus_annotations)

1162

attr[attrname]._dbus_annotations = (

1163

dict(attribute._dbus_annotations))

1653

1164

except AttributeError:

1654

1165

pass

1655

1166

# Is this a D-Bus property?

1658

1169

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

1659

1170

# property with the alternate D-Bus interface

1660

1171

# name. Add it to the class.

1661

attr[attrname] = (dbus_service_property(

1662

alt_interface, attribute._dbus_signature,

1663

attribute._dbus_access,

1664

attribute._dbus_get_args_options

1665

["byte_arrays"])

1666

(copy_function(attribute)))

1172

attr[attrname] = (dbus_service_property

1173

(alt_interface,

1174

attribute._dbus_signature,

1175

attribute._dbus_access,

1176

attribute

1177

._dbus_get_args_options

1178

["byte_arrays"])

1179

(types.FunctionType

1180

(attribute.func_code,

1181

attribute.func_globals,

1182

attribute.func_name,

1183

attribute.func_defaults,

1184

attribute.func_closure)))

1667

1185

# Copy annotations, if any

1668

1186

try:

1669

attr[attrname]._dbus_annotations = dict(

1670

attribute._dbus_annotations)

1187

attr[attrname]._dbus_annotations = (

1188

dict(attribute._dbus_annotations))

1671

1189

except AttributeError:

1672

1190

pass

1673

1191

# Is this a D-Bus interface?

1676

1194

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

1677

1195

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

1678

1196

# to the class.

1679

attr[attrname] = (

1680

dbus_interface_annotations(alt_interface)

1681

(copy_function(attribute)))

1197

attr[attrname] = (dbus_interface_annotations

1198

(alt_interface)

1199

(types.FunctionType

1200

(attribute.func_code,

1201

attribute.func_globals,

1202

attribute.func_name,

1203

attribute.func_defaults,

1204

attribute.func_closure)))

1682

1205

if deprecate:

1683

1206

# Deprecate all alternate interfaces

1684

iname = "_AlternateDBusNames_interface_annotation{}"

1207

iname="_AlternateDBusNames_interface_annotation{0}"

1685

1208

for interface_name in interface_names:

1686

1687

1209

@dbus_interface_annotations(interface_name)

1688

1210

def func(self):

1689

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

1690

"true"}

1211

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

1212

"true" }

1691

1213

# Find an unused name

1692

1214

for aname in (iname.format(i)

1693

1215

for i in itertools.count()):

1697

1219

if interface_names:

1698

1220

# Replace the class with a new subclass of it with

1699

1221

# methods, signals, etc. as created above.

1700

if sys.version_info.major == 2:

1701

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

1702

(cls, ), attr)

1703

else:

1704

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

1705

(cls, ), attr)

1222

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

1223

(cls,), attr)

1706

1224

return cls

1707

1708

1225

return wrapper

1709

1226

1710

1227

1711

1228

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

1712

"se.bsnet.fukt.Mandos"})

1229

"se.bsnet.fukt.Mandos"})

1713

1230

class ClientDBus(Client, DBusObjectWithProperties):

1714

1231

"""A Client class using D-Bus

1715

1232

1716

1233

Attributes:

1717

1234

dbus_object_path: dbus.ObjectPath

1718

1235

bus: dbus.SystemBus()

1719

1236

"""

1720

1237

1721

1238

runtime_expansions = (Client.runtime_expansions

1722

+ ("dbus_object_path", ))

1723

1724

_interface = "se.recompile.Mandos.Client"

1725

1239

+ ("dbus_object_path",))

1240

1726

1241

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

1727

1728

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

1242

1243

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

1729

1244

self.bus = bus

1730

1245

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

1731

1246

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

1732

1247

# the D-Bus

1733

client_object_name = str(self.name).translate(

1248

client_object_name = unicode(self.name).translate(

1734

1249

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

1735

1250

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

1736

self.dbus_object_path = dbus.ObjectPath(

1737

"/clients/" + client_object_name)

1251

self.dbus_object_path = (dbus.ObjectPath

1252

("/clients/" + client_object_name))

1738

1253

DBusObjectWithProperties.__init__(self, self.bus,

1739

1254

self.dbus_object_path)

1740

1741

def notifychangeproperty(transform_func, dbus_name,

1742

type_func=lambda x: x,

1743

variant_level=1,

1744

invalidate_only=False,

1745

_interface=_interface):

1255

1256

def notifychangeproperty(transform_func,

1257

dbus_name, type_func=lambda x: x,

1258

variant_level=1):

1746

1259

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

1747

1260

its changes to DBus.

1748

1261

1749

1262

transform_fun: Function that takes a value and a variant_level

1750

1263

and transforms it to a D-Bus type.

1751

1264

dbus_name: D-Bus name of the variable

1753

1266

to the D-Bus. Default: no transform

1754

1267

variant_level: D-Bus variant level. Default: 1

1755

1268

"""

1756

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

1757

1269

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

1758

1270

def setter(self, value):

1759

1271

if hasattr(self, "dbus_object_path"):

1760

1272

if (not hasattr(self, attrname) or

1761

1273

type_func(getattr(self, attrname, None))

1762

1274

!= type_func(value)):

1763

if invalidate_only:

1764

self.PropertiesChanged(

1765

_interface, dbus.Dictionary(),

1766

dbus.Array((dbus_name, )))

1767

else:

1768

dbus_value = transform_func(

1769

type_func(value),

1770

variant_level=variant_level)

1771

self.PropertyChanged(dbus.String(dbus_name),

1772

dbus_value)

1773

self.PropertiesChanged(

1774

_interface,

1775

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

1776

dbus_value}),

1777

dbus.Array())

1275

dbus_value = transform_func(type_func(value),

1276

variant_level

1277

=variant_level)

1278

self.PropertyChanged(dbus.String(dbus_name),

1279

dbus_value)

1778

1280

setattr(self, attrname, value)

1779

1281

1780

1282

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

1781

1283

1782

1284

expires = notifychangeproperty(datetime_to_dbus, "Expires")

1783

1285

approvals_pending = notifychangeproperty(dbus.Boolean,

1784

1286

"ApprovalPending",

1785

type_func=bool)

1287

type_func = bool)

1786

1288

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

1787

1289

last_enabled = notifychangeproperty(datetime_to_dbus,

1788

1290

"LastEnabled")

1789

checker = notifychangeproperty(

1790

dbus.Boolean, "CheckerRunning",

1791

type_func=lambda checker: checker is not None)

1291

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

1292

type_func = lambda checker:

1293

checker is not None)

1792

1294

last_checked_ok = notifychangeproperty(datetime_to_dbus,

1793

1295

"LastCheckedOK")

1794

1296

last_checker_status = notifychangeproperty(dbus.Int16,

1797

1299

datetime_to_dbus, "LastApprovalRequest")

1798

1300

approved_by_default = notifychangeproperty(dbus.Boolean,

1799

1301

"ApprovedByDefault")

1800

approval_delay = notifychangeproperty(

1801

dbus.UInt64, "ApprovalDelay",

1802

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

1302

approval_delay = notifychangeproperty(dbus.UInt64,

1303

"ApprovalDelay",

1304

type_func =

1305

timedelta_to_milliseconds)

1803

1306

approval_duration = notifychangeproperty(

1804

1307

dbus.UInt64, "ApprovalDuration",

1805

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

1308

type_func = timedelta_to_milliseconds)

1806

1309

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

1807

timeout = notifychangeproperty(

1808

dbus.UInt64, "Timeout",

1809

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

1310

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

1311

type_func =

1312

timedelta_to_milliseconds)

1810

1313

extended_timeout = notifychangeproperty(

1811

1314

dbus.UInt64, "ExtendedTimeout",

1812

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

1813

interval = notifychangeproperty(

1814

dbus.UInt64, "Interval",

1815

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

1315

type_func = timedelta_to_milliseconds)

1316

interval = notifychangeproperty(dbus.UInt64,

1317

"Interval",

1318

type_func =

1319

timedelta_to_milliseconds)

1816

1320

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

1817

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

1818

invalidate_only=True)

1819

1321

1820

1322

del notifychangeproperty

1821

1323

1822

1324

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

1823

1325

try:

1824

1326

self.remove_from_connection()

1827

1329

if hasattr(DBusObjectWithProperties, "__del__"):

1828

1330

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

1829

1331

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

1830

1831

def checker_callback(self, source, condition,

1832

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

1833

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

1834

connection, command, *args,

1835

**kwargs)

1836

exitstatus = self.last_checker_status

1837

if exitstatus >= 0:

1332

1333

def checker_callback(self, pid, condition, command,

1334

*args, **kwargs):

1335

self.checker_callback_tag = None

1336

self.checker = None

1337

if os.WIFEXITED(condition):

1338

exitstatus = os.WEXITSTATUS(condition)

1838

1339

# Emit D-Bus signal

1839

1340

self.CheckerCompleted(dbus.Int16(exitstatus),

1840

# This is specific to GNU libC

1841

dbus.Int64(exitstatus << 8),

1341

dbus.Int64(condition),

1842

1342

dbus.String(command))

1843

1343

else:

1844

1344

# Emit D-Bus signal

1845

1345

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

1846

dbus.Int64(

1847

# This is specific to GNU libC

1848

(exitstatus << 8)

1849

| self.last_checker_signal),

1346

dbus.Int64(condition),

1850

1347

dbus.String(command))

1851

return ret

1852

1348

1349

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

1350

*args, **kwargs)

1351

1853

1352

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

1854

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

1353

old_checker = self.checker

1354

if self.checker is not None:

1355

old_checker_pid = self.checker.pid

1356

else:

1357

old_checker_pid = None

1855

1358

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

1856

1359

# Only if new checker process was started

1857

1360

if (self.checker is not None

1859

1362

# Emit D-Bus signal

1860

1363

self.CheckerStarted(self.current_checker_command)

1861

1364

return r

1862

1365

1863

1366

def _reset_approved(self):

1864

1367

self.approved = None

1865

1368

return False

1866

1369

1867

1370

def approve(self, value=True):

1868

1371

self.approved = value

1869

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

1870

* 1000), self._reset_approved)

1372

gobject.timeout_add(timedelta_to_milliseconds

1373

(self.approval_duration),

1374

self._reset_approved)

1871

1375

self.send_changedstate()

1872

1873

# D-Bus methods, signals & properties

1874

1875

# Interfaces

1876

1877

# Signals

1878

1376

1377

## D-Bus methods, signals & properties

1378

_interface = "se.recompile.Mandos.Client"

1379

1380

## Interfaces

1381

1382

@dbus_interface_annotations(_interface)

1383

def _foo(self):

1384

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

1385

"false"}

1386

1387

## Signals

1388

1879

1389

# CheckerCompleted - signal

1880

1390

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

1881

1391

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

1882

1392

"D-Bus signal"

1883

1393

pass

1884

1394

1885

1395

# CheckerStarted - signal

1886

1396

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

1887

1397

def CheckerStarted(self, command):

1888

1398

"D-Bus signal"

1889

1399

pass

1890

1400

1891

1401

# PropertyChanged - signal

1892

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

1893

1402

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

1894

1403

def PropertyChanged(self, property, value):

1895

1404

"D-Bus signal"

1896

1405

pass

1897

1406

1898

1407

# GotSecret - signal

1899

1408

@dbus.service.signal(_interface)

1900

1409

def GotSecret(self):

1903

1412

server to mandos-client

1904

1413

"""

1905

1414

pass

1906

1415

1907

1416

# Rejected - signal

1908

1417

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

1909

1418

def Rejected(self, reason):

1910

1419

"D-Bus signal"

1911

1420

pass

1912

1421

1913

1422

# NeedApproval - signal

1914

1423

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

1915

1424

def NeedApproval(self, timeout, default):

1916

1425

"D-Bus signal"

1917

1426

return self.need_approval()

1918

1919

# Methods

1920

1427

1428

## Methods

1429

1921

1430

# Approve - method

1922

1431

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

1923

1432

def Approve(self, value):

1924

1433

self.approve(value)

1925

1434

1926

1435

# CheckedOK - method

1927

1436

@dbus.service.method(_interface)

1928

1437

def CheckedOK(self):

1929

1438

self.checked_ok()

1930

1439

1931

1440

# Enable - method

1932

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

1933

1441

@dbus.service.method(_interface)

1934

1442

def Enable(self):

1935

1443

"D-Bus method"

1936

1444

self.enable()

1937

1445

1938

1446

# StartChecker - method

1939

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

1940

1447

@dbus.service.method(_interface)

1941

1448

def StartChecker(self):

1942

1449

"D-Bus method"

1943

1450

self.start_checker()

1944

1451

1945

1452

# Disable - method

1946

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

1947

1453

@dbus.service.method(_interface)

1948

1454

def Disable(self):

1949

1455

"D-Bus method"

1950

1456

self.disable()

1951

1457

1952

1458

# StopChecker - method

1953

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

1954

1459

@dbus.service.method(_interface)

1955

1460

def StopChecker(self):

1956

1461

self.stop_checker()

1957

1958

# Properties

1959

1462

1463

## Properties

1464

1960

1465

# ApprovalPending - property

1961

1466

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

1962

1467

def ApprovalPending_dbus_property(self):

1963

1468

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

1964

1469

1965

1470

# ApprovedByDefault - property

1966

@dbus_service_property(_interface,

1967

signature="b",

1471

@dbus_service_property(_interface, signature="b",

1968

1472

access="readwrite")

1969

1473

def ApprovedByDefault_dbus_property(self, value=None):

1970

1474

if value is None: # get

1971

1475

return dbus.Boolean(self.approved_by_default)

1972

1476

self.approved_by_default = bool(value)

1973

1477

1974

1478

# ApprovalDelay - property

1975

@dbus_service_property(_interface,

1976

signature="t",

1479

@dbus_service_property(_interface, signature="t",

1977

1480

access="readwrite")

1978

1481

def ApprovalDelay_dbus_property(self, value=None):

1979

1482

if value is None: # get

1980

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

1981

* 1000)

1483

return dbus.UInt64(self.approval_delay_milliseconds())

1982

1484

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

1983

1485

1984

1486

# ApprovalDuration - property

1985

@dbus_service_property(_interface,

1986

signature="t",

1487

@dbus_service_property(_interface, signature="t",

1987

1488

access="readwrite")

1988

1489

def ApprovalDuration_dbus_property(self, value=None):

1989

1490

if value is None: # get

1990

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

1991

* 1000)

1491

return dbus.UInt64(timedelta_to_milliseconds(

1492

self.approval_duration))

1992

1493

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

1993

1494

1994

1495

# Name - property

1995

@dbus_annotations(

1996

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

1997

1496

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

1998

1497

def Name_dbus_property(self):

1999

1498

return dbus.String(self.name)

2000

1499

2001

1500

# Fingerprint - property

2002

@dbus_annotations(

2003

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

2004

1501

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

2005

1502

def Fingerprint_dbus_property(self):

2006

1503

return dbus.String(self.fingerprint)

2007

1504

2008

1505

# Host - property

2009

@dbus_service_property(_interface,

2010

signature="s",

1506

@dbus_service_property(_interface, signature="s",

2011

1507

access="readwrite")

2012

1508

def Host_dbus_property(self, value=None):

2013

1509

if value is None: # get

2014

1510

return dbus.String(self.host)

2015

self.host = str(value)

2016

1511

self.host = unicode(value)

1512

2017

1513

# Created - property

2018

@dbus_annotations(

2019

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

2020

1514

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

2021

1515

def Created_dbus_property(self):

2022

1516

return datetime_to_dbus(self.created)

2023

1517

2024

1518

# LastEnabled - property

2025

1519

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

2026

1520

def LastEnabled_dbus_property(self):

2027

1521

return datetime_to_dbus(self.last_enabled)

2028

1522

2029

1523

# Enabled - property

2030

@dbus_service_property(_interface,

2031

signature="b",

1524

@dbus_service_property(_interface, signature="b",

2032

1525

access="readwrite")

2033

1526

def Enabled_dbus_property(self, value=None):

2034

1527

if value is None: # get

2037

1530

self.enable()

2038

1531

else:

2039

1532

self.disable()

2040

1533

2041

1534

# LastCheckedOK - property

2042

@dbus_service_property(_interface,

2043

signature="s",

1535

@dbus_service_property(_interface, signature="s",

2044

1536

access="readwrite")

2045

1537

def LastCheckedOK_dbus_property(self, value=None):

2046

1538

if value is not None:

2047

1539

self.checked_ok()

2048

1540

return

2049

1541

return datetime_to_dbus(self.last_checked_ok)

2050

1542

2051

1543

# LastCheckerStatus - property

2052

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

1544

@dbus_service_property(_interface, signature="n",

1545

access="read")

2053

1546

def LastCheckerStatus_dbus_property(self):

2054

1547

return dbus.Int16(self.last_checker_status)

2055

1548

2056

1549

# Expires - property

2057

1550

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

2058

1551

def Expires_dbus_property(self):

2059

1552

return datetime_to_dbus(self.expires)

2060

1553

2061

1554

# LastApprovalRequest - property

2062

1555

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

2063

1556

def LastApprovalRequest_dbus_property(self):

2064

1557

return datetime_to_dbus(self.last_approval_request)

2065

1558

2066

1559

# Timeout - property

2067

@dbus_service_property(_interface,

2068

signature="t",

1560

@dbus_service_property(_interface, signature="t",

2069

1561

access="readwrite")

2070

1562

def Timeout_dbus_property(self, value=None):

2071

1563

if value is None: # get

2072

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

1564

return dbus.UInt64(self.timeout_milliseconds())

2073

1565

old_timeout = self.timeout

2074

1566

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

2075

1567

# Reschedule disabling

2083

1575

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

2084

1576

is None):

2085

1577

return

2086

GLib.source_remove(self.disable_initiator_tag)

2087

self.disable_initiator_tag = GLib.timeout_add(

2088

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

2089

self.disable)

2090

1578

gobject.source_remove(self.disable_initiator_tag)

1579

self.disable_initiator_tag = (

1580

gobject.timeout_add(

1581

timedelta_to_milliseconds(self.expires - now),

1582

self.disable))

1583

2091

1584

# ExtendedTimeout - property

2092

@dbus_service_property(_interface,

2093

signature="t",

1585

@dbus_service_property(_interface, signature="t",

2094

1586

access="readwrite")

2095

1587

def ExtendedTimeout_dbus_property(self, value=None):

2096

1588

if value is None: # get

2097

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

2098

* 1000)

1589

return dbus.UInt64(self.extended_timeout_milliseconds())

2099

1590

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

2100

1591

2101

1592

# Interval - property

2102

@dbus_service_property(_interface,

2103

signature="t",

1593

@dbus_service_property(_interface, signature="t",

2104

1594

access="readwrite")

2105

1595

def Interval_dbus_property(self, value=None):

2106

1596

if value is None: # get

2107

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

1597

return dbus.UInt64(self.interval_milliseconds())

2108

1598

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

2109

1599

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

2110

1600

return

2111

1601

if self.enabled:

2112

1602

# Reschedule checker run

2113

GLib.source_remove(self.checker_initiator_tag)

2114

self.checker_initiator_tag = GLib.timeout_add(

2115

value, self.start_checker)

2116

self.start_checker() # Start one now, too

2117

1603

gobject.source_remove(self.checker_initiator_tag)

1604

self.checker_initiator_tag = (gobject.timeout_add

1605

(value, self.start_checker))

1606

self.start_checker() # Start one now, too

1607

2118

1608

# Checker - property

2119

@dbus_service_property(_interface,

2120

signature="s",

1609

@dbus_service_property(_interface, signature="s",

2121

1610

access="readwrite")

2122

1611

def Checker_dbus_property(self, value=None):

2123

1612

if value is None: # get

2124

1613

return dbus.String(self.checker_command)

2125

self.checker_command = str(value)

2126

1614

self.checker_command = unicode(value)

1615

2127

1616

# CheckerRunning - property

2128

@dbus_service_property(_interface,

2129

signature="b",

1617

@dbus_service_property(_interface, signature="b",

2130

1618

access="readwrite")

2131

1619

def CheckerRunning_dbus_property(self, value=None):

2132

1620

if value is None: # get

2135

1623

self.start_checker()

2136

1624

else:

2137

1625

self.stop_checker()

2138

1626

2139

1627

# ObjectPath - property

2140

@dbus_annotations(

2141

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

2142

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

2143

1628

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

2144

1629

def ObjectPath_dbus_property(self):

2145

return self.dbus_object_path # is already a dbus.ObjectPath

2146

1630

return self.dbus_object_path # is already a dbus.ObjectPath

1631

2147

1632

# Secret = property

2148

@dbus_annotations(

2149

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

2150

"invalidates"})

2151

@dbus_service_property(_interface,

2152

signature="ay",

2153

access="write",

2154

byte_arrays=True)

1633

@dbus_service_property(_interface, signature="ay",

1634

access="write", byte_arrays=True)

2155

1635

def Secret_dbus_property(self, value):

2156

self.secret = bytes(value)

2157

1636

self.secret = str(value)

1637

2158

1638

del _interface

2159

1639

2160

1640

2163

1643

self._pipe = child_pipe

2164

1644

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

2165

1645

if not self._pipe.recv():

2166

raise KeyError(fpr)

2167

1646

raise KeyError()

1647

2168

1648

def __getattribute__(self, name):

2169

1649

if name == '_pipe':

2170

1650

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

2173

1653

if data[0] == 'data':

2174

1654

return data[1]

2175

1655

if data[0] == 'function':

2176

2177

1656

def func(*args, **kwargs):

2178

1657

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

2179

1658

return self._pipe.recv()[1]

2180

2181

1659

return func

2182

1660

2183

1661

def __setattr__(self, name, value):

2184

1662

if name == '_pipe':

2185

1663

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

2188

1666

2189

1667

class ClientHandler(socketserver.BaseRequestHandler, object):

2190

1668

"""A class to handle client connections.

2191

1669

2192

1670

Instantiated once for each connection to handle it.

2193

1671

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

2194

1672

2195

1673

def handle(self):

2196

1674

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

2197

1675

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

2198

str(self.client_address))

1676

unicode(self.client_address))

2199

1677

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

2200

1678

self.server.child_pipe.fileno())

2201

2202

session = gnutls.ClientSession(self.request)

2203

2204

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

2205

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

2206

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

2207

# "+DHE-DSS"))

1679

1680

session = (gnutls.connection

1681

.ClientSession(self.request,

1682

gnutls.connection

1683

.X509Credentials()))

1684

1685

# Note: gnutls.connection.X509Credentials is really a

1686

# generic GnuTLS certificate credentials object so long as

1687

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

1688

# here despite using OpenPGP certificates.

1689

1690

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

1691

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

1692

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

1693

# "+DHE-DSS"))

2208

1694

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

2209

1695

priority = self.server.gnutls_priority

2210

1696

if priority is None:

2211

1697

priority = "NORMAL"

2212

gnutls.priority_set_direct(session._c_object,

2213

priority.encode("utf-8"),

2214

None)

2215

1698

(gnutls.library.functions

1699

.gnutls_priority_set_direct(session._c_object,

1700

priority, None))

1701

2216

1702

# Start communication using the Mandos protocol

2217

1703

# Get protocol number

2218

1704

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

2223

1709

except (ValueError, IndexError, RuntimeError) as error:

2224

1710

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

2225

1711

return

2226

1712

2227

1713

# Start GnuTLS connection

2228

1714

try:

2229

1715

session.handshake()

2230

except gnutls.Error as error:

1716

except gnutls.errors.GNUTLSError as error:

2231

1717

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

2232

1718

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

2233

1719

# established. Just abandon the request.

2234

1720

return

2235

1721

logger.debug("Handshake succeeded")

2236

1722

2237

1723

approval_required = False

2238

1724

try:

2239

1725

try:

2240

fpr = self.fingerprint(

2241

self.peer_certificate(session))

2242

except (TypeError, gnutls.Error) as error:

1726

fpr = self.fingerprint(self.peer_certificate

1727

(session))

1728

except (TypeError,

1729

gnutls.errors.GNUTLSError) as error:

2243

1730

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

2244

1731

return

2245

1732

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

2246

1733

2247

1734

try:

2248

1735

client = ProxyClient(child_pipe, fpr,

2249

1736

self.client_address)

2250

1737

except KeyError:

2251

1738

return

2252

1739

2253

1740

if client.approval_delay:

2254

1741

delay = client.approval_delay

2255

1742

client.approvals_pending += 1

2256

1743

approval_required = True

2257

1744

2258

1745

while True:

2259

1746

if not client.enabled:

2260

1747

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

2261

client.name)

1748

client.name)

2262

1749

if self.server.use_dbus:

2263

1750

# Emit D-Bus signal

2264

1751

client.Rejected("Disabled")

2265

1752

return

2266

1753

2267

1754

if client.approved or not client.approval_delay:

2268

# We are approved or approval is disabled

1755

#We are approved or approval is disabled

2269

1756

break

2270

1757

elif client.approved is None:

2271

1758

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

2273

1760

if self.server.use_dbus:

2274

1761

# Emit D-Bus signal

2275

1762

client.NeedApproval(

2276

client.approval_delay.total_seconds()

2277

* 1000, client.approved_by_default)

1763

client.approval_delay_milliseconds(),

1764

client.approved_by_default)

2278

1765

else:

2279

1766

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

2280

1767

client.name)

2282

1769

# Emit D-Bus signal

2283

1770

client.Rejected("Denied")

2284

1771

return

2285

2286

# wait until timeout or approved

1772

1773

#wait until timeout or approved

2287

1774

time = datetime.datetime.now()

2288

1775

client.changedstate.acquire()

2289

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

1776

client.changedstate.wait(

1777

float(timedelta_to_milliseconds(delay)

1778

/ 1000))

2290

1779

client.changedstate.release()

2291

1780

time2 = datetime.datetime.now()

2292

1781

if (time2 - time) >= delay:

2302

1791

break

2303

1792

else:

2304

1793

delay -= time2 - time

2305

2306

try:

2307

session.send(client.secret)

2308

except gnutls.Error as error:

2309

logger.warning("gnutls send failed",

2310

exc_info=error)

2311

return

2312

1794

1795

sent_size = 0

1796

while sent_size < len(client.secret):

1797

try:

1798

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

1799

except gnutls.errors.GNUTLSError as error:

1800

logger.warning("gnutls send failed",

1801

exc_info=error)

1802

return

1803

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

1804

sent, len(client.secret)

1805

- (sent_size + sent))

1806

sent_size += sent

1807

2313

1808

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

2314

1809

# bump the timeout using extended_timeout

2315

1810

client.bump_timeout(client.extended_timeout)

2316

1811

if self.server.use_dbus:

2317

1812

# Emit D-Bus signal

2318

1813

client.GotSecret()

2319

1814

2320

1815

finally:

2321

1816

if approval_required:

2322

1817

client.approvals_pending -= 1

2323

1818

try:

2324

1819

session.bye()

2325

except gnutls.Error as error:

1820

except gnutls.errors.GNUTLSError as error:

2326

1821

logger.warning("GnuTLS bye failed",

2327

1822

exc_info=error)

2328

1823

2329

1824

@staticmethod

2330

1825

def peer_certificate(session):

2331

1826

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

2332

1827

# If not an OpenPGP certificate...

2333

if (gnutls.certificate_type_get(session._c_object)

2334

!= gnutls.CRT_OPENPGP):

2335

# ...return invalid data

2336

return b""

1828

if (gnutls.library.functions

1829

.gnutls_certificate_type_get(session._c_object)

1830

!= gnutls.library.constants.GNUTLS_CRT_OPENPGP):

1831

# ...do the normal thing

1832

return session.peer_certificate

2337

1833

list_size = ctypes.c_uint(1)

2338

cert_list = (gnutls.certificate_get_peers

1834

cert_list = (gnutls.library.functions

1835

.gnutls_certificate_get_peers

2339

1836

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

2340

1837

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

2341

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

1838

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

1839

" certificate")

2342

1840

if list_size.value == 0:

2343

1841

return None

2344

1842

cert = cert_list[0]

2345

1843

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

2346

1844

2347

1845

@staticmethod

2348

1846

def fingerprint(openpgp):

2349

1847

"Convert an OpenPGP bytestring to a hexdigit fingerprint"

2350

1848

# New GnuTLS "datum" with the OpenPGP public key

2351

datum = gnutls.datum_t(

2352

ctypes.cast(ctypes.c_char_p(openpgp),

2353

ctypes.POINTER(ctypes.c_ubyte)),

2354

ctypes.c_uint(len(openpgp)))

1849

datum = (gnutls.library.types

1850

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

1851

ctypes.POINTER

1852

(ctypes.c_ubyte)),

1853

ctypes.c_uint(len(openpgp))))

2355

1854

# New empty GnuTLS certificate

2356

crt = gnutls.openpgp_crt_t()

2357

gnutls.openpgp_crt_init(ctypes.byref(crt))

1855

crt = gnutls.library.types.gnutls_openpgp_crt_t()

1856

(gnutls.library.functions

1857

.gnutls_openpgp_crt_init(ctypes.byref(crt)))

2358

1858

# Import the OpenPGP public key into the certificate

2359

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

2360

gnutls.OPENPGP_FMT_RAW)

1859

(gnutls.library.functions

1860

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

1861

gnutls.library.constants

1862

.GNUTLS_OPENPGP_FMT_RAW))

2361

1863

# Verify the self signature in the key

2362

1864

crtverify = ctypes.c_uint()

2363

gnutls.openpgp_crt_verify_self(crt, 0,

2364

ctypes.byref(crtverify))

1865

(gnutls.library.functions

1866

.gnutls_openpgp_crt_verify_self(crt, 0,

1867

ctypes.byref(crtverify)))

2365

1868

if crtverify.value != 0:

2366

gnutls.openpgp_crt_deinit(crt)

2367

raise gnutls.CertificateSecurityError("Verify failed")

1869

gnutls.library.functions.gnutls_openpgp_crt_deinit(crt)

1870

raise (gnutls.errors.CertificateSecurityError

1871

("Verify failed"))

2368

1872

# New buffer for the fingerprint

2369

1873

buf = ctypes.create_string_buffer(20)

2370

1874

buf_len = ctypes.c_size_t()

2371

1875

# Get the fingerprint from the certificate into the buffer

2372

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

2373

ctypes.byref(buf_len))

1876

(gnutls.library.functions

1877

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

1878

ctypes.byref(buf_len)))

2374

1879

# Deinit the certificate

2375

gnutls.openpgp_crt_deinit(crt)

1880

gnutls.library.functions.gnutls_openpgp_crt_deinit(crt)

2376

1881

# Convert the buffer to a Python bytestring

2377

1882

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

2378

1883

# Convert the bytestring to hexadecimal notation

2382

1887

2383

1888

class MultiprocessingMixIn(object):

2384

1889

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

2385

2386

1890

def sub_process_main(self, request, address):

2387

1891

try:

2388

1892

self.finish_request(request, address)

2389

1893

except Exception:

2390

1894

self.handle_error(request, address)

2391

1895

self.close_request(request)

2392

1896

2393

1897

def process_request(self, request, address):

2394

1898

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

2395

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

2396

args=(request, address))

1899

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

1900

args = (request, address))

2397

1901

proc.start()

2398

1902

return proc

2399

1903

2400

1904

2401

1905

class MultiprocessingMixInWithPipe(MultiprocessingMixIn, object):

2402

1906

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

2403

2404

1907

def process_request(self, request, client_address):

2405

1908

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

2406

1909

2407

1910

This function creates a new pipe in self.pipe

2408

1911

"""

2409

1912

parent_pipe, self.child_pipe = multiprocessing.Pipe()

2410

1913

2411

1914

proc = MultiprocessingMixIn.process_request(self, request,

2412

1915

client_address)

2413

1916

self.child_pipe.close()

2414

1917

self.add_pipe(parent_pipe, proc)

2415

1918

2416

1919

def add_pipe(self, parent_pipe, proc):

2417

1920

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

2418

1921

raise NotImplementedError()

2421

1924

class IPv6_TCPServer(MultiprocessingMixInWithPipe,

2422

1925

socketserver.TCPServer, object):

2423

1926

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

2424

1927

2425

1928

Attributes:

2426

1929

enabled: Boolean; whether this server is activated yet

2427

1930

interface: None or a network interface name (string)

2428

1931

use_ipv6: Boolean; to use IPv6 or not

2429

1932

"""

2430

2431

1933

def __init__(self, server_address, RequestHandlerClass,

2432

interface=None,

2433

use_ipv6=True,

2434

socketfd=None):

1934

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

2435

1935

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

2436

1936

creating a new one with socket.socket().

2437

1937

"""

2443

1943

self.socketfd = socketfd

2444

1944

# Save the original socket.socket() function

2445

1945

self.socket_socket = socket.socket

2446

2447

1946

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

2448

#

1947

#

2449

1948

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

2450

1949

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

2451

1950

# patching socket.socket.)

2452

#

1951

#

2453

1952

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

2454

1953

@functools.wraps(socket.socket)

2455

1954

def socket_wrapper(*args, **kwargs):

2467

1966

# socket_wrapper(), if socketfd was set.

2468

1967

socketserver.TCPServer.__init__(self, server_address,

2469

1968

RequestHandlerClass)

2470

1969

2471

1970

def server_bind(self):

2472

1971

"""This overrides the normal server_bind() function

2473

1972

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

2474

1973

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

2475

global SO_BINDTODEVICE

2476

1974

if self.interface is not None:

2477

1975

if SO_BINDTODEVICE is None:

2478

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

2479

# common enough.

2480

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

2481

SO_BINDTODEVICE = 25

2482

try:

2483

self.socket.setsockopt(

2484

socket.SOL_SOCKET, SO_BINDTODEVICE,

2485

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

2486

except socket.error as error:

2487

if error.errno == errno.EPERM:

2488

logger.error("No permission to bind to"

2489

" interface %s", self.interface)

2490

elif error.errno == errno.ENOPROTOOPT:

2491

logger.error("SO_BINDTODEVICE not available;"

2492

" cannot bind to interface %s",

2493

self.interface)

2494

elif error.errno == errno.ENODEV:

2495

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

2496

" cannot bind", self.interface)

2497

else:

2498

raise

1976

logger.error("SO_BINDTODEVICE does not exist;"

1977

" cannot bind to interface %s",

1978

self.interface)

1979

else:

1980

try:

1981

self.socket.setsockopt(socket.SOL_SOCKET,

1982

SO_BINDTODEVICE,

1983

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

1984

except socket.error as error:

1985

if error.errno == errno.EPERM:

1986

logger.error("No permission to bind to"

1987

" interface %s", self.interface)

1988

elif error.errno == errno.ENOPROTOOPT:

1989

logger.error("SO_BINDTODEVICE not available;"

1990

" cannot bind to interface %s",

1991

self.interface)

1992

elif error.errno == errno.ENODEV:

1993

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

1994

" cannot bind", self.interface)

1995

else:

1996

raise

2499

1997

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

2500

1998

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

2501

1999

if not self.server_address[0]:

2502

2000

if self.address_family == socket.AF_INET6:

2503

any_address = "::" # in6addr_any

2001

any_address = "::" # in6addr_any

2504

2002

else:

2505

any_address = "0.0.0.0" # INADDR_ANY

2003

any_address = "0.0.0.0" # INADDR_ANY

2506

2004

self.server_address = (any_address,

2507

2005

self.server_address[1])

2508

2006

elif not self.server_address[1]:

2509

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

2007

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

2008

0)

2510

2009

# if self.interface:

2511

2010

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

2512

2011

# 0, # port

2518

2017

2519

2018

class MandosServer(IPv6_TCPServer):

2520

2019

"""Mandos server.

2521

2020

2522

2021

Attributes:

2523

2022

clients: set of Client objects

2524

2023

gnutls_priority GnuTLS priority string

2525

2024

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

2526

2527

Assumes a GLib.MainLoop event loop.

2025

2026

Assumes a gobject.MainLoop event loop.

2528

2027

"""

2529

2530

2028

def __init__(self, server_address, RequestHandlerClass,

2531

interface=None,

2532

use_ipv6=True,

2533

clients=None,

2534

gnutls_priority=None,

2535

use_dbus=True,

2536

socketfd=None):

2029

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

2030

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

2537

2031

self.enabled = False

2538

2032

self.clients = clients

2539

2033

if self.clients is None:

2542

2036

self.gnutls_priority = gnutls_priority

2543

2037

IPv6_TCPServer.__init__(self, server_address,

2544

2038

RequestHandlerClass,

2545

interface=interface,

2546

use_ipv6=use_ipv6,

2547

socketfd=socketfd)

2548

2039

interface = interface,

2040

use_ipv6 = use_ipv6,

2041

socketfd = socketfd)

2549

2042

def server_activate(self):

2550

2043

if self.enabled:

2551

2044

return socketserver.TCPServer.server_activate(self)

2552

2045

2553

2046

def enable(self):

2554

2047

self.enabled = True

2555

2048

2556

2049

def add_pipe(self, parent_pipe, proc):

2557

2050

# Call "handle_ipc" for both data and EOF events

2558

GLib.io_add_watch(

2559

parent_pipe.fileno(),

2560

GLib.IO_IN | GLib.IO_HUP,

2561

functools.partial(self.handle_ipc,

2562

parent_pipe=parent_pipe,

2563

proc=proc))

2564

2565

def handle_ipc(self, source, condition,

2566

parent_pipe=None,

2567

proc=None,

2568

client_object=None):

2051

gobject.io_add_watch(parent_pipe.fileno(),

2052

gobject.IO_IN | gobject.IO_HUP,

2053

functools.partial(self.handle_ipc,

2054

parent_pipe =

2055

parent_pipe,

2056

proc = proc))

2057

2058

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

2059

proc = None, client_object=None):

2569

2060

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

2570

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

2061

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

2571

2062

# Wait for other process to exit

2572

2063

proc.join()

2573

2064

return False

2574

2065

2575

2066

# Read a request from the child

2576

2067

request = parent_pipe.recv()

2577

2068

command = request[0]

2578

2069

2579

2070

if command == 'init':

2580

2071

fpr = request[1]

2581

2072

address = request[2]

2582

2583

for c in self.clients.values():

2073

2074

for c in self.clients.itervalues():

2584

2075

if c.fingerprint == fpr:

2585

2076

client = c

2586

2077

break

2593

2084

address[0])

2594

2085

parent_pipe.send(False)

2595

2086

return False

2596

2597

GLib.io_add_watch(

2598

parent_pipe.fileno(),

2599

GLib.IO_IN | GLib.IO_HUP,

2600

functools.partial(self.handle_ipc,

2601

parent_pipe=parent_pipe,

2602

proc=proc,

2603

client_object=client))

2087

2088

gobject.io_add_watch(parent_pipe.fileno(),

2089

gobject.IO_IN | gobject.IO_HUP,

2090

functools.partial(self.handle_ipc,

2091

parent_pipe =

2092

parent_pipe,

2093

proc = proc,

2094

client_object =

2095

client))

2604

2096

parent_pipe.send(True)

2605

2097

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

2606

2098

# same fileno

2609

2101

funcname = request[1]

2610

2102

args = request[2]

2611

2103

kwargs = request[3]

2612

2104

2613

2105

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

2614

2106

funcname)(*args,

2615

**kwargs)))

2616

2107

**kwargs)))

2108

2617

2109

if command == 'getattr':

2618

2110

attrname = request[1]

2619

if isinstance(client_object.__getattribute__(attrname),

2620

collections.Callable):

2621

parent_pipe.send(('function', ))

2111

if callable(client_object.__getattribute__(attrname)):

2112

parent_pipe.send(('function',))

2622

2113

else:

2623

parent_pipe.send((

2624

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

2625

2114

parent_pipe.send(('data', client_object

2115

.__getattribute__(attrname)))

2116

2626

2117

if command == 'setattr':

2627

2118

attrname = request[1]

2628

2119

value = request[2]

2629

2120

setattr(client_object, attrname, value)

2630

2121

2631

2122

return True

2632

2123

2633

2124

2634

2125

def rfc3339_duration_to_delta(duration):

2635

2126

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

2636

2127

2637

2128

>>> rfc3339_duration_to_delta("P7D")

2638

2129

datetime.timedelta(7)

2639

2130

>>> rfc3339_duration_to_delta("PT60S")

2649

2140

>>> rfc3339_duration_to_delta("P1DT3M20S")

2650

2141

datetime.timedelta(1, 200)

2651

2142

"""

2652

2143

2653

2144

# Parsing an RFC 3339 duration with regular expressions is not

2654

2145

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

2655

2146

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

2656

2147

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

2657

2148

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

2658

2149

# avoid excessive use of external libraries.

2659

2150

2660

2151

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

2661

Token = collections.namedtuple("Token", (

2662

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

2663

# a "group" containing digits

2664

"value", # datetime.timedelta or None

2665

"followers")) # Tokens valid after this token

2152

Token = collections.namedtuple("Token",

2153

("regexp", # To match token; if

2154

# "value" is not None,

2155

# must have a "group"

2156

# containing digits

2157

"value", # datetime.timedelta or

2158

# None

2159

"followers")) # Tokens valid after

2160

# this token

2666

2161

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

2667

2162

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

2668

2163

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

2669

2164

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

2670

2165

datetime.timedelta(seconds=1),

2671

frozenset((token_end, )))

2166

frozenset((token_end,)))

2672

2167

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

2673

2168

datetime.timedelta(minutes=1),

2674

2169

frozenset((token_second, token_end)))

2690

2185

frozenset((token_month, token_end)))

2691

2186

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

2692

2187

datetime.timedelta(weeks=1),

2693

frozenset((token_end, )))

2188

frozenset((token_end,)))

2694

2189

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

2695

2190

frozenset((token_year, token_month,

2696

2191

token_day, token_time,

2697

token_week)))

2698

# Define starting values:

2699

# Value so far

2700

value = datetime.timedelta()

2192

token_week))),

2193

# Define starting values

2194

value = datetime.timedelta() # Value so far

2701

2195

found_token = None

2702

# Following valid tokens

2703

followers = frozenset((token_duration, ))

2704

# String left to parse

2705

s = duration

2196

followers = frozenset(token_duration,) # Following valid tokens

2197

s = duration # String left to parse

2706

2198

# Loop until end token is found

2707

2199

while found_token is not token_end:

2708

2200

# Search for any currently valid tokens

2724

2216

break

2725

2217

else:

2726

2218

# No currently valid tokens were found

2727

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

2728

.format(duration))

2219

raise ValueError("Invalid RFC 3339 duration")

2729

2220

# End token found

2730

2221

return value

2731

2222

2732

2223

2733

2224

def string_to_delta(interval):

2734

2225

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

2735

2226

2736

2227

>>> string_to_delta('7d')

2737

2228

datetime.timedelta(7)

2738

2229

>>> string_to_delta('60s')

2746

2237

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

2747

2238

datetime.timedelta(0, 330)

2748

2239

"""

2749

2240

2750

2241

try:

2751

2242

return rfc3339_duration_to_delta(interval)

2752

2243

except ValueError:

2753

2244

pass

2754

2245

2755

2246

timevalue = datetime.timedelta(0)

2756

2247

for s in interval.split():

2757

2248

try:

2758

suffix = s[-1]

2249

suffix = unicode(s[-1])

2759

2250

value = int(s[:-1])

2760

2251

if suffix == "d":

2761

2252

delta = datetime.timedelta(value)

2768

2259

elif suffix == "w":

2769

2260

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

2770

2261

else:

2771

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

2262

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

2263

.format(suffix))

2772

2264

except IndexError as e:

2773

2265

raise ValueError(*(e.args))

2774

2266

timevalue += delta

2775

2267

return timevalue

2776

2268

2777

2269

2778

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

2270

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

2779

2271

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

2780

2272

2781

2273

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

2782

2274

if os.fork():

2783

2275

sys.exit()

2791

2283

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

2792

2284

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

2793

2285

raise OSError(errno.ENODEV,

2794

"{} not a character device"

2286

"{0} not a character device"

2795

2287

.format(os.devnull))

2796

2288

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

2797

2289

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

2801

2293

2802

2294

2803

2295

def main():

2804

2296

2805

2297

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

2806

2298

# Parsing of options, both command line and config file

2807

2299

2808

2300

parser = argparse.ArgumentParser()

2809

2301

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

2810

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

2302

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

2811

2303

help="show version number and exit")

2812

2304

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

2813

2305

help="Bind to interface IF")

2846

2338

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

2847

2339

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

2848

2340

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

2849

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

2850

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

2851

default=None)

2852

2341

2853

2342

options = parser.parse_args()

2854

2343

2855

2344

if options.check:

2856

2345

import doctest

2857

2346

fail_count, test_count = doctest.testmod()

2858

2347

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

2859

2348

2860

2349

# Default values for config file for server-global settings

2861

server_defaults = {"interface": "",

2862

"address": "",

2863

"port": "",

2864

"debug": "False",

2865

"priority":

2866

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

2867

":+SIGN-DSA-SHA256",

2868

"servicename": "Mandos",

2869

"use_dbus": "True",

2870

"use_ipv6": "True",

2871

"debuglevel": "",

2872

"restore": "True",

2873

"socket": "",

2874

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

2875

"foreground": "False",

2876

"zeroconf": "True",

2877

}

2878

2350

server_defaults = { "interface": "",

2351

"address": "",

2352

"port": "",

2353

"debug": "False",

2354

"priority":

2355

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

2356

"servicename": "Mandos",

2357

"use_dbus": "True",

2358

"use_ipv6": "True",

2359

"debuglevel": "",

2360

"restore": "True",

2361

"socket": "",

2362

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

2363

"foreground": "False",

2364

}

2365

2879

2366

# Parse config file for server-global settings

2880

2367

server_config = configparser.SafeConfigParser(server_defaults)

2881

2368

del server_defaults

2882

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

2369

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

2370

"mandos.conf"))

2883

2371

# Convert the SafeConfigParser object to a dict

2884

2372

server_settings = server_config.defaults()

2885

2373

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

2886

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

2887

"foreground", "zeroconf"):

2374

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

2888

2375

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

2889

2376

option)

2890

2377

if server_settings["port"]:

2900

2387

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

2901

2388

["socket"])

2902

2389

del server_config

2903

2390

2904

2391

# Override the settings from the config file with command line

2905

2392

# options, if set.

2906

2393

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

2907

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

2908

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

2909

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

2394

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

2395

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

2396

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

2910

2397

value = getattr(options, option)

2911

2398

if value is not None:

2912

2399

server_settings[option] = value

2913

2400

del options

2914

2401

# Force all strings to be unicode

2915

2402

for option in server_settings.keys():

2916

if isinstance(server_settings[option], bytes):

2917

server_settings[option] = (server_settings[option]

2918

.decode("utf-8"))

2403

if type(server_settings[option]) is str:

2404

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

2919

2405

# Force all boolean options to be boolean

2920

2406

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

2921

"foreground", "zeroconf"):

2407

"foreground"):

2922

2408

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

2923

2409

# Debug implies foreground

2924

2410

if server_settings["debug"]:

2925

2411

server_settings["foreground"] = True

2926

2412

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

2927

2413

2928

2414

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

2929

2930

if (not server_settings["zeroconf"]

2931

and not (server_settings["port"]

2932

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

2933

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

2934

2415

2935

2416

# For convenience

2936

2417

debug = server_settings["debug"]

2937

2418

debuglevel = server_settings["debuglevel"]

2940

2421

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

2941

2422

stored_state_file)

2942

2423

foreground = server_settings["foreground"]

2943

zeroconf = server_settings["zeroconf"]

2944

2424

2945

2425

if debug:

2946

2426

initlogger(debug, logging.DEBUG)

2947

2427

else:

2950

2430

else:

2951

2431

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

2952

2432

initlogger(debug, level)

2953

2433

2954

2434

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

2955

syslogger.setFormatter(

2956

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

2957

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

2958

server_settings["servicename"])))

2959

2435

syslogger.setFormatter(logging.Formatter

2436

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

2437

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

2438

.format(server_settings

2439

["servicename"])))

2440

2960

2441

# Parse config file with clients

2961

2442

client_config = configparser.SafeConfigParser(Client

2962

2443

.client_defaults)

2963

2444

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

2964

2445

"clients.conf"))

2965

2446

2966

2447

global mandos_dbus_service

2967

2448

mandos_dbus_service = None

2968

2969

socketfd = None

2970

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

2971

socketfd = server_settings["socket"]

2972

tcp_server = MandosServer(

2973

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

2974

ClientHandler,

2975

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

2976

use_ipv6=use_ipv6,

2977

gnutls_priority=server_settings["priority"],

2978

use_dbus=use_dbus,

2979

socketfd=socketfd)

2449

2450

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

2451

server_settings["port"]),

2452

ClientHandler,

2453

interface=(server_settings["interface"]

2454

or None),

2455

use_ipv6=use_ipv6,

2456

gnutls_priority=

2457

server_settings["priority"],

2458

use_dbus=use_dbus,

2459

socketfd=(server_settings["socket"]

2460

or None))

2980

2461

if not foreground:

2981

2462

pidfilename = "/run/mandos.pid"

2982

2463

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

2983

2464

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

2984

2465

pidfile = None

2985

2466

try:

2986

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

2467

pidfile = open(pidfilename, "w")

2987

2468

except IOError as e:

2988

2469

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

2989

2470

exc_info=e)

2990

2991

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

2992

("mandos", "mandos"),

2993

("nobody", "nogroup")):

2471

2472

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

2994

2473

try:

2995

2474

uid = pwd.getpwnam(name).pw_uid

2996

gid = pwd.getpwnam(group).pw_gid

2475

gid = pwd.getpwnam(name).pw_gid

2997

2476

break

2998

2477

except KeyError:

2999

2478

continue

3003

2482

try:

3004

2483

os.setgid(gid)

3005

2484

os.setuid(uid)

3006

if debug:

3007

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

3008

gid))

3009

2485

except OSError as error:

3010

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

3011

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

3012

2486

if error.errno != errno.EPERM:

3013

2487

raise

3014

2488

3015

2489

if debug:

3016

2490

# Enable all possible GnuTLS debugging

3017

2491

3018

2492

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

3019

2493

# - GnuTLS manual

3020

gnutls.global_set_log_level(11)

3021

3022

@gnutls.log_func

2494

gnutls.library.functions.gnutls_global_set_log_level(11)

2495

2496

@gnutls.library.types.gnutls_log_func

3023

2497

def debug_gnutls(level, string):

3024

2498

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

3025

3026

gnutls.global_set_log_function(debug_gnutls)

3027

2499

2500

(gnutls.library.functions

2501

.gnutls_global_set_log_function(debug_gnutls))

2502

3028

2503

# Redirect stdin so all checkers get /dev/null

3029

2504

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

3030

2505

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

3031

2506

if null > 2:

3032

2507

os.close(null)

3033

2508

3034

2509

# Need to fork before connecting to D-Bus

3035

2510

if not foreground:

3036

2511

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

3037

2512

daemon()

3038

3039

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

3040

# to inform GLib that threads will be used.

3041

GLib.threads_init()

3042

2513

2514

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

2515

# need to inform gobject that threads will be used.

2516

gobject.threads_init()

2517

3043

2518

global main_loop

3044

2519

# From the Avahi example code

3045

2520

DBusGMainLoop(set_as_default=True)

3046

main_loop = GLib.MainLoop()

2521

main_loop = gobject.MainLoop()

3047

2522

bus = dbus.SystemBus()

3048

2523

# End of Avahi example code

3049

2524

if use_dbus:

3050

2525

try:

3051

2526

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

3052

bus,

3053

do_not_queue=True)

3054

old_bus_name = dbus.service.BusName(

3055

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

3056

do_not_queue=True)

3057

except dbus.exceptions.DBusException as e:

2527

bus, do_not_queue=True)

2528

old_bus_name = (dbus.service.BusName

2529

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

2530

do_not_queue=True))

2531

except dbus.exceptions.NameExistsException as e:

3058

2532

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

3059

2533

use_dbus = False

3060

2534

server_settings["use_dbus"] = False

3061

2535

tcp_server.use_dbus = False

3062

if zeroconf:

3063

protocol = avahi.PROTO_INET6 if use_ipv6 else avahi.PROTO_INET

3064

service = AvahiServiceToSyslog(

3065

name=server_settings["servicename"],

3066

servicetype="_mandos._tcp",

3067

protocol=protocol,

3068

bus=bus)

3069

if server_settings["interface"]:

3070

service.interface = if_nametoindex(

3071

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

3072

2536

protocol = avahi.PROTO_INET6 if use_ipv6 else avahi.PROTO_INET

2537

service = AvahiServiceToSyslog(name =

2538

server_settings["servicename"],

2539

servicetype = "_mandos._tcp",

2540

protocol = protocol, bus = bus)

2541

if server_settings["interface"]:

2542

service.interface = (if_nametoindex

2543

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

2544

3073

2545

global multiprocessing_manager

3074

2546

multiprocessing_manager = multiprocessing.Manager()

3075

2547

3076

2548

client_class = Client

3077

2549

if use_dbus:

3078

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

3079

2550

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

2551

3080

2552

client_settings = Client.config_parser(client_config)

3081

2553

old_client_settings = {}

3082

2554

clients_data = {}

3083

2555

3084

2556

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

3085

2557

global wnull

3086

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

2558

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

3087

2559

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

3088

2560

# mode

3089

2561

if debug or not foreground:

3090

2562

wnull.close()

3091

2563

3092

2564

# Get client data and settings from last running state.

3093

2565

if server_settings["restore"]:

3094

2566

try:

3095

2567

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

3096

if sys.version_info.major == 2:

3097

clients_data, old_client_settings = pickle.load(

3098

stored_state)

3099

else:

3100

bytes_clients_data, bytes_old_client_settings = (

3101

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

3102

# Fix bytes to strings

3103

# clients_data

3104

# .keys()

3105

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

3106

if isinstance(key, bytes)

3107

else key): value

3108

for key, value in

3109

bytes_clients_data.items()}

3110

del bytes_clients_data

3111

for key in clients_data:

3112

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

3113

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

3114

for k, v in

3115

clients_data[key].items()}

3116

clients_data[key] = value

3117

# .client_structure

3118

value["client_structure"] = [

3119

(s.decode("utf-8")

3120

if isinstance(s, bytes)

3121

else s) for s in

3122

value["client_structure"]]

3123

# .name & .host

3124

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

3125

if isinstance(value[k], bytes):

3126

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

3127

# old_client_settings

3128

# .keys()

3129

old_client_settings = {

3130

(key.decode("utf-8")

3131

if isinstance(key, bytes)

3132

else key): value

3133

for key, value in

3134

bytes_old_client_settings.items()}

3135

del bytes_old_client_settings

3136

# .host

3137

for value in old_client_settings.values():

3138

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

3139

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

3140

.decode("utf-8"))

2568

clients_data, old_client_settings = (pickle.load

2569

(stored_state))

3141

2570

os.remove(stored_state_path)

3142

2571

except IOError as e:

3143

2572

if e.errno == errno.ENOENT:

3144

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

3145

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

2573

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

2574

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

3146

2575

else:

3147

2576

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

3148

2577

exc_info=e)

3149

2578

raise

3150

2579

except EOFError as e:

3151

2580

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

3152

"EOFError:",

3153

exc_info=e)

3154

2581

"EOFError:", exc_info=e)

2582

3155

2583

with PGPEngine() as pgp:

3156

for client_name, client in clients_data.items():

2584

for client_name, client in clients_data.iteritems():

3157

2585

# Skip removed clients

3158

2586

if client_name not in client_settings:

3159

2587

continue

3160

2588

3161

2589

# Decide which value to use after restoring saved state.

3162

2590

# We have three different values: Old config file,

3163

2591

# new config file, and saved state.

3168

2596

# For each value in new config, check if it

3169

2597

# differs from the old config value (Except for

3170

2598

# the "secret" attribute)

3171

if (name != "secret"

3172

and (value !=

3173

old_client_settings[client_name][name])):

2599

if (name != "secret" and

2600

value != old_client_settings[client_name]

2601

[name]):

3174

2602

client[name] = value

3175

2603

except KeyError:

3176

2604

pass

3177

2605

3178

2606

# Clients who has passed its expire date can still be

3179

# enabled if its last checker was successful. A Client

2607

# enabled if its last checker was successful. Clients

3180

2608

# whose checker succeeded before we stored its state is

3181

2609

# assumed to have successfully run all checkers during

3182

2610

# downtime.

3184

2612

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

3185

2613

if not client["last_checked_ok"]:

3186

2614

logger.warning(

3187

"disabling client {} - Client never "

3188

"performed a successful checker".format(

3189

client_name))

2615

"disabling client {0} - Client never "

2616

"performed a successful checker"

2617

.format(client_name))

3190

2618

client["enabled"] = False

3191

2619

elif client["last_checker_status"] != 0:

3192

2620

logger.warning(

3193

"disabling client {} - Client last"

3194

" checker failed with error code"

3195

" {}".format(

3196

client_name,

3197

client["last_checker_status"]))

2621

"disabling client {0} - Client "

2622

"last checker failed with error code {1}"

2623

.format(client_name,

2624

client["last_checker_status"]))

3198

2625

client["enabled"] = False

3199

2626

else:

3200

client["expires"] = (

3201

datetime.datetime.utcnow()

3202

+ client["timeout"])

2627

client["expires"] = (datetime.datetime

2628

.utcnow()

2629

+ client["timeout"])

3203

2630

logger.debug("Last checker succeeded,"

3204

" keeping {} enabled".format(

3205

client_name))

2631

" keeping {0} enabled"

2632

.format(client_name))

3206

2633

try:

3207

client["secret"] = pgp.decrypt(

3208

client["encrypted_secret"],

3209

client_settings[client_name]["secret"])

2634

client["secret"] = (

2635

pgp.decrypt(client["encrypted_secret"],

2636

client_settings[client_name]

2637

["secret"]))

3210

2638

except PGPError:

3211

2639

# If decryption fails, we use secret from new settings

3212

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

3213

client_name))

3214

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

3215

["secret"])

3216

2640

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

2641

.format(client_name))

2642

client["secret"] = (

2643

client_settings[client_name]["secret"])

2644

3217

2645

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

3218

2646

for client_name in (set(old_client_settings)

3219

2647

- set(client_settings)):

3221

2649

for client_name in (set(client_settings)

3222

2650

- set(old_client_settings)):

3223

2651

clients_data[client_name] = client_settings[client_name]

3224

2652

3225

2653

# Create all client objects

3226

for client_name, client in clients_data.items():

2654

for client_name, client in clients_data.iteritems():

3227

2655

tcp_server.clients[client_name] = client_class(

3228

name=client_name,

3229

settings=client,

3230

server_settings=server_settings)

3231

2656

name = client_name, settings = client,

2657

server_settings = server_settings)

2658

3232

2659

if not tcp_server.clients:

3233

2660

logger.warning("No clients defined")

3234

2661

3235

2662

if not foreground:

3236

2663

if pidfile is not None:

3237

pid = os.getpid()

3238

2664

try:

3239

2665

with pidfile:

3240

print(pid, file=pidfile)

2666

pid = os.getpid()

2667

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

3241

2668

except IOError:

3242

2669

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

3243

2670

pidfilename, pid)

3244

2671

del pidfile

3245

2672

del pidfilename

3246

3247

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

3248

GLib.unix_signal_add(GLib.PRIORITY_HIGH, termsig,

3249

lambda: main_loop.quit() and False)

3250

2673

2674

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

2675

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

2676

3251

2677

if use_dbus:

3252

3253

@alternate_dbus_interfaces(

3254

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

3255

class MandosDBusService(DBusObjectWithObjectManager):

2678

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

2679

"se.bsnet.fukt.Mandos"})

2680

class MandosDBusService(DBusObjectWithProperties):

3256

2681

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

3257

3258

2682

def __init__(self):

3259

2683

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

3260

3261

2684

_interface = "se.recompile.Mandos"

3262

2685

2686

@dbus_interface_annotations(_interface)

2687

def _foo(self):

2688

return { "org.freedesktop.DBus.Property"

2689

".EmitsChangedSignal":

2690

"false"}

2691

3263

2692

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

3264

2693

def ClientAdded(self, objpath):

3265

2694

"D-Bus signal"

3266

2695

pass

3267

2696

3268

2697

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

3269

2698

def ClientNotFound(self, fingerprint, address):

3270

2699

"D-Bus signal"

3271

2700

pass

3272

3273

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

3274

"true"})

2701

3275

2702

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

3276

2703

def ClientRemoved(self, objpath, name):

3277

2704

"D-Bus signal"

3278

2705

pass

3279

3280

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

3281

"true"})

2706

3282

2707

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

3283

2708

def GetAllClients(self):

3284

2709

"D-Bus method"

3285

return dbus.Array(c.dbus_object_path for c in

3286

tcp_server.clients.values())

3287

3288

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

3289

"true"})

2710

return dbus.Array(c.dbus_object_path

2711

for c in

2712

tcp_server.clients.itervalues())

2713

3290

2714

@dbus.service.method(_interface,

3291

2715

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

3292

2716

def GetAllClientsWithProperties(self):

3293

2717

"D-Bus method"

3294

2718

return dbus.Dictionary(

3295

{c.dbus_object_path: c.GetAll(

3296

"se.recompile.Mandos.Client")

3297

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

2719

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

2720

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

3298

2721

signature="oa{sv}")

3299

2722

3300

2723

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

3301

2724

def RemoveClient(self, object_path):

3302

2725

"D-Bus method"

3303

for c in tcp_server.clients.values():

2726

for c in tcp_server.clients.itervalues():

3304

2727

if c.dbus_object_path == object_path:

3305

2728

del tcp_server.clients[c.name]

3306

2729

c.remove_from_connection()

3307

# Don't signal the disabling

2730

# Don't signal anything except ClientRemoved

3308

2731

c.disable(quiet=True)

3309

# Emit D-Bus signal for removal

3310

self.client_removed_signal(c)

2732

# Emit D-Bus signal

2733

self.ClientRemoved(object_path, c.name)

3311

2734

return

3312

2735

raise KeyError(object_path)

3313

2736

3314

2737

del _interface

3315

3316

@dbus.service.method(dbus.OBJECT_MANAGER_IFACE,

3317

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

3318

def GetManagedObjects(self):

3319

"""D-Bus method"""

3320

return dbus.Dictionary(

3321

{client.dbus_object_path:

3322

dbus.Dictionary(

3323

{interface: client.GetAll(interface)

3324

for interface in

3325

client._get_all_interface_names()})

3326

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

3327

3328

def client_added_signal(self, client):

3329

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

3330

if use_dbus:

3331

# New standard signal

3332

self.InterfacesAdded(

3333

client.dbus_object_path,

3334

dbus.Dictionary(

3335

{interface: client.GetAll(interface)

3336

for interface in

3337

client._get_all_interface_names()}))

3338

# Old signal

3339

self.ClientAdded(client.dbus_object_path)

3340

3341

def client_removed_signal(self, client):

3342

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

3343

if use_dbus:

3344

# New standard signal

3345

self.InterfacesRemoved(

3346

client.dbus_object_path,

3347

client._get_all_interface_names())

3348

# Old signal

3349

self.ClientRemoved(client.dbus_object_path,

3350

client.name)

3351

2738

3352

2739

mandos_dbus_service = MandosDBusService()

3353

3354

# Save modules to variables to exempt the modules from being

3355

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

3356

mp = multiprocessing

3357

wn = wnull

3358

2740

3359

2741

def cleanup():

3360

2742

"Cleanup function; run on exit"

3361

if zeroconf:

3362

service.cleanup()

3363

3364

mp.active_children()

3365

wn.close()

2743

service.cleanup()

2744

2745

multiprocessing.active_children()

2746

wnull.close()

3366

2747

if not (tcp_server.clients or client_settings):

3367

2748

return

3368

2749

3369

2750

# Store client before exiting. Secrets are encrypted with key

3370

2751

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

3371

2752

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

3372

2753

clients = {}

3373

2754

with PGPEngine() as pgp:

3374

for client in tcp_server.clients.values():

2755

for client in tcp_server.clients.itervalues():

3375

2756

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

3376

2757

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

3377

2758

key)

3378

2759

client_dict = {}

3379

2760

3380

2761

# A list of attributes that can not be pickled

3381

2762

# + secret.

3382

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

3383

"checker", "server_settings"}

3384

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

3385

.Object):

2763

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

2764

"checker", "server_settings"))

2765

for name, typ in (inspect.getmembers

2766

(dbus.service.Object)):

3386

2767

exclude.add(name)

3387

2768

3388

2769

client_dict["encrypted_secret"] = (client

3389

2770

.encrypted_secret)

3390

2771

for attr in client.client_structure:

3391

2772

if attr not in exclude:

3392

2773

client_dict[attr] = getattr(client, attr)

3393

2774

3394

2775

clients[client.name] = client_dict

3395

2776

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

3396

2777

3397

2778

try:

3398

with tempfile.NamedTemporaryFile(

3399

mode='wb',

3400

suffix=".pickle",

3401

prefix='clients-',

3402

dir=os.path.dirname(stored_state_path),

3403

delete=False) as stored_state:

3404

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

3405

protocol=2)

3406

tempname = stored_state.name

2779

with (tempfile.NamedTemporaryFile

2780

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

2781

dir=os.path.dirname(stored_state_path),

2782

delete=False)) as stored_state:

2783

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

2784

tempname=stored_state.name

3407

2785

os.rename(tempname, stored_state_path)

3408

2786

except (IOError, OSError) as e:

3409

2787

if not debug:

3412

2790

except NameError:

3413

2791

pass

3414

2792

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

3415

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

2793

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

3416

2794

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

3417

2795

else:

3418

2796

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

3419

2797

exc_info=e)

3420

2798

raise

3421

2799

3422

2800

# Delete all clients, and settings from config

3423

2801

while tcp_server.clients:

3424

2802

name, client = tcp_server.clients.popitem()

3425

2803

if use_dbus:

3426

2804

client.remove_from_connection()

3427

# Don't signal the disabling

2805

# Don't signal anything except ClientRemoved

3428

2806

client.disable(quiet=True)

3429

# Emit D-Bus signal for removal

3430

2807

if use_dbus:

3431

mandos_dbus_service.client_removed_signal(client)

2808

# Emit D-Bus signal

2809

mandos_dbus_service.ClientRemoved(client

2810

.dbus_object_path,

2811

client.name)

3432

2812

client_settings.clear()

3433

2813

3434

2814

atexit.register(cleanup)

3435

3436

for client in tcp_server.clients.values():

2815

2816

for client in tcp_server.clients.itervalues():

3437

2817

if use_dbus:

3438

# Emit D-Bus signal for adding

3439

mandos_dbus_service.client_added_signal(client)

2818

# Emit D-Bus signal

2819

mandos_dbus_service.ClientAdded(client.dbus_object_path)

3440

2820

# Need to initiate checking of clients

3441

2821

if client.enabled:

3442

2822

client.init_checker()

3443

2823

3444

2824

tcp_server.enable()

3445

2825

tcp_server.server_activate()

3446

2826

3447

2827

# Find out what port we got

3448

if zeroconf:

3449

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

2828

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

3450

2829

if use_ipv6:

3451

2830

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

3452

2831

" flowinfo %d, scope_id %d",

3454

2833

else: # IPv4

3455

2834

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

3456

2835

*tcp_server.socket.getsockname())

3457

3458

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

3459

2836

2837

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

2838

3460

2839

try:

3461

if zeroconf:

3462

# From the Avahi example code

3463

try:

3464

service.activate()

3465

except dbus.exceptions.DBusException as error:

3466

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

3467

cleanup()

3468

sys.exit(1)

3469

# End of Avahi example code

3470

3471

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

3472

lambda *args, **kwargs:

3473

(tcp_server.handle_request

3474

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

3475

2840

# From the Avahi example code

2841

try:

2842

service.activate()

2843

except dbus.exceptions.DBusException as error:

2844

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

2845

cleanup()

2846

sys.exit(1)

2847

# End of Avahi example code

2848

2849

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

2850

lambda *args, **kwargs:

2851

(tcp_server.handle_request

2852

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

2853

3476

2854

logger.debug("Starting main loop")

3477

2855

main_loop.run()

3478

2856

except AvahiError as error:

3487

2865

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

3488

2866

cleanup()

3489

2867

3490

3491

2868

if __name__ == '__main__':

3492

2869

main()