/mandos/release : revision 237.7.335

1

#!/usr/bin/python

1

#!/usr/bin/python2.7

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

#

17

# This file is part of Mandos.

18

#

19

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

20

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

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

21

19

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

22

20

# (at your option) any later version.

23

21

#

24

# Mandos is distributed in the hope that it will be useful, but

25

# WITHOUT ANY WARRANTY; without even the implied warranty of

22

# This program is distributed in the hope that it will be useful,

23

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

26

24

# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the

27

25

# GNU General Public License for more details.

28

#

26

#

29

27

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

30

# along with Mandos. If not, see <http://www.gnu.org/licenses/>.

31

#

28

# along with this program. If not, see

29

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

30

#

32

31

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

33

#

32

#

34

33

35

34

from __future__ import (division, absolute_import, print_function,

36

35

unicode_literals)

37

36

38

try:

39

from future_builtins import *

40

except ImportError:

41

pass

37

from future_builtins import *

42

38

43

39

try:

44

40

import SocketServer as socketserver

48

44

import argparse

49

45

import datetime

50

46

import errno

47

import gnutls.crypto

48

import gnutls.connection

49

import gnutls.errors

50

import gnutls.library.functions

51

import gnutls.library.constants

52

import gnutls.library.types

51

53

try:

52

54

import ConfigParser as configparser

53

55

except ImportError:

80

82

81

83

import dbus

82

84

import dbus.service

83

from gi.repository import GLib

85

try:

86

import gobject

87

except ImportError:

88

from gi.repository import GObject as gobject

89

import avahi

84

90

from dbus.mainloop.glib import DBusGMainLoop

85

91

import ctypes

86

92

import ctypes.util

87

93

import xml.dom.minidom

88

94

import inspect

89

95

90

# Try to find the value of SO_BINDTODEVICE:

91

96

try:

92

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

93

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

94

97

SO_BINDTODEVICE = socket.SO_BINDTODEVICE

95

98

except AttributeError:

96

99

try:

97

# This is where SO_BINDTODEVICE was up to and including Python

98

# 2.6, and also 3.2:

99

100

from IN import SO_BINDTODEVICE

100

101

except ImportError:

101

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

102

# Try running the C preprocessor:

103

try:

104

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

105

"/dev/stdin"],

106

stdin=subprocess.PIPE,

107

stdout=subprocess.PIPE)

108

stdout = cc.communicate(

109

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

110

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

111

except (OSError, ValueError, IndexError):

112

# No value found

113

SO_BINDTODEVICE = None

102

SO_BINDTODEVICE = None

114

103

115

104

if sys.version_info.major == 2:

116

105

str = unicode

117

106

118

version = "1.7.16"

107

version = "1.6.9"

119

108

stored_state_file = "clients.pickle"

120

109

121

110

logger = logging.getLogger()

125

114

if_nametoindex = ctypes.cdll.LoadLibrary(

126

115

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

127

116

except (OSError, AttributeError):

128

117

129

118

def if_nametoindex(interface):

130

119

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

131

120

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

136

125

return interface_index

137

126

138

127

139

def copy_function(func):

140

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

141

if sys.version_info.major == 2:

142

return types.FunctionType(func.func_code,

143

func.func_globals,

144

func.func_name,

145

func.func_defaults,

146

func.func_closure)

147

else:

148

return types.FunctionType(func.__code__,

149

func.__globals__,

150

func.__name__,

151

func.__defaults__,

152

func.__closure__)

153

154

155

128

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

156

129

"""init logger and add loglevel"""

157

130

158

131

global syslogger

159

132

syslogger = (logging.handlers.SysLogHandler(

160

facility=logging.handlers.SysLogHandler.LOG_DAEMON,

161

address="/dev/log"))

133

facility = logging.handlers.SysLogHandler.LOG_DAEMON,

134

address = "/dev/log"))

162

135

syslogger.setFormatter(logging.Formatter

163

136

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

164

137

' %(message)s'))

165

138

logger.addHandler(syslogger)

166

139

167

140

if debug:

168

141

console = logging.StreamHandler()

169

142

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

181

154

182

155

class PGPEngine(object):

183

156

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

184

157

185

158

def __init__(self):

186

159

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

187

self.gpg = "gpg"

188

try:

189

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

190

for line in output.splitlines():

191

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

192

if name == "gpg":

193

self.gpg = path

194

break

195

except OSError as e:

196

if e.errno != errno.ENOENT:

197

raise

198

160

self.gnupgargs = ['--batch',

199

'--homedir', self.tempdir,

161

'--home', self.tempdir,

200

162

'--force-mdc',

201

'--quiet']

202

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

203

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

204

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

205

163

'--quiet',

164

'--no-use-agent']

165

206

166

def __enter__(self):

207

167

return self

208

168

209

169

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

210

170

self._cleanup()

211

171

return False

212

172

213

173

def __del__(self):

214

174

self._cleanup()

215

175

216

176

def _cleanup(self):

217

177

if self.tempdir is not None:

218

178

# Delete contents of tempdir

219

179

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

220

topdown=False):

180

topdown = False):

221

181

for filename in files:

222

182

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

223

183

for dirname in dirs:

225

185

# Remove tempdir

226

186

os.rmdir(self.tempdir)

227

187

self.tempdir = None

228

188

229

189

def password_encode(self, password):

230

190

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

231

191

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

236

196

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

237

197

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

238

198

return encoded

239

199

240

200

def encrypt(self, data, password):

241

201

passphrase = self.password_encode(password)

242

202

with tempfile.NamedTemporaryFile(

243

203

dir=self.tempdir) as passfile:

244

204

passfile.write(passphrase)

245

205

passfile.flush()

246

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

206

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

247

207

'--passphrase-file',

248

208

passfile.name]

249

209

+ self.gnupgargs,

250

stdin=subprocess.PIPE,

251

stdout=subprocess.PIPE,

252

stderr=subprocess.PIPE)

253

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

210

stdin = subprocess.PIPE,

211

stdout = subprocess.PIPE,

212

stderr = subprocess.PIPE)

213

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

254

214

if proc.returncode != 0:

255

215

raise PGPError(err)

256

216

return ciphertext

257

217

258

218

def decrypt(self, data, password):

259

219

passphrase = self.password_encode(password)

260

220

with tempfile.NamedTemporaryFile(

261

dir=self.tempdir) as passfile:

221

dir = self.tempdir) as passfile:

262

222

passfile.write(passphrase)

263

223

passfile.flush()

264

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

224

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

265

225

'--passphrase-file',

266

226

passfile.name]

267

227

+ self.gnupgargs,

268

stdin=subprocess.PIPE,

269

stdout=subprocess.PIPE,

270

stderr=subprocess.PIPE)

271

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

228

stdin = subprocess.PIPE,

229

stdout = subprocess.PIPE,

230

stderr = subprocess.PIPE)

231

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

272

232

if proc.returncode != 0:

273

233

raise PGPError(err)

274

234

return decrypted_plaintext

275

235

276

236

277

# Pretend that we have an Avahi module

278

class Avahi(object):

279

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

280

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

281

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

282

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

283

PROTO_INET = 0 # avahi-common/address.h

284

PROTO_INET6 = 1 # avahi-common/address.h

285

DBUS_NAME = "org.freedesktop.Avahi"

286

DBUS_INTERFACE_ENTRY_GROUP = DBUS_NAME + ".EntryGroup"

287

DBUS_INTERFACE_SERVER = DBUS_NAME + ".Server"

288

DBUS_PATH_SERVER = "/"

289

290

def string_array_to_txt_array(self, t):

291

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

292

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

293

ENTRY_GROUP_ESTABLISHED = 2 # avahi-common/defs.h

294

ENTRY_GROUP_COLLISION = 3 # avahi-common/defs.h

295

ENTRY_GROUP_FAILURE = 4 # avahi-common/defs.h

296

SERVER_INVALID = 0 # avahi-common/defs.h

297

SERVER_REGISTERING = 1 # avahi-common/defs.h

298

SERVER_RUNNING = 2 # avahi-common/defs.h

299

SERVER_COLLISION = 3 # avahi-common/defs.h

300

SERVER_FAILURE = 4 # avahi-common/defs.h

301

avahi = Avahi()

302

303

304

237

class AvahiError(Exception):

305

238

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

306

239

self.value = value

318

251

319

252

class AvahiService(object):

320

253

"""An Avahi (Zeroconf) service.

321

254

322

255

Attributes:

323

256

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

324

257

Used to optionally bind to the specified interface.

336

269

server: D-Bus Server

337

270

bus: dbus.SystemBus()

338

271

"""

339

272

340

273

def __init__(self,

341

interface=avahi.IF_UNSPEC,

342

name=None,

343

servicetype=None,

344

port=None,

345

TXT=None,

346

domain="",

347

host="",

348

max_renames=32768,

349

protocol=avahi.PROTO_UNSPEC,

350

bus=None):

274

interface = avahi.IF_UNSPEC,

275

name = None,

276

servicetype = None,

277

port = None,

278

TXT = None,

279

domain = "",

280

host = "",

281

max_renames = 32768,

282

protocol = avahi.PROTO_UNSPEC,

283

bus = None):

351

284

self.interface = interface

352

285

self.name = name

353

286

self.type = servicetype

362

295

self.server = None

363

296

self.bus = bus

364

297

self.entry_group_state_changed_match = None

365

298

366

299

def rename(self, remove=True):

367

300

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

368

301

if self.rename_count >= self.max_renames:

388

321

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

389

322

self.cleanup()

390

323

os._exit(1)

391

324

392

325

def remove(self):

393

326

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

394

327

if self.entry_group_state_changed_match is not None:

396

329

self.entry_group_state_changed_match = None

397

330

if self.group is not None:

398

331

self.group.Reset()

399

332

400

333

def add(self):

401

334

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

402

335

self.remove()

419

352

dbus.UInt16(self.port),

420

353

avahi.string_array_to_txt_array(self.TXT))

421

354

self.group.Commit()

422

355

423

356

def entry_group_state_changed(self, state, error):

424

357

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

425

358

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

426

359

427

360

if state == avahi.ENTRY_GROUP_ESTABLISHED:

428

361

logger.debug("Zeroconf service established.")

429

362

elif state == avahi.ENTRY_GROUP_COLLISION:

433

366

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

434

367

str(error))

435

368

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

436

369

437

370

def cleanup(self):

438

371

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

439

372

if self.group is not None:

444

377

pass

445

378

self.group = None

446

379

self.remove()

447

380

448

381

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

449

382

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

450

383

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

479

412

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

480

413

else:

481

414

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

482

415

483

416

def activate(self):

484

417

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

485

418

if self.server is None:

496

429

class AvahiServiceToSyslog(AvahiService):

497

430

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

498

431

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

499

ret = super(AvahiServiceToSyslog, self).rename(*args, **kwargs)

432

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

500

433

syslogger.setFormatter(logging.Formatter(

501

434

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

502

435

.format(self.name)))

503

436

return ret

504

437

505

506

# Pretend that we have a GnuTLS module

507

class GnuTLS(object):

508

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

509

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

510

511

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

512

if library is None:

513

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

514

_library = ctypes.cdll.LoadLibrary(library)

515

del library

516

_need_version = b"3.3.0"

517

518

def __init__(self):

519

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

520

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

521

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

522

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

523

.format(self._need_version))

524

525

# Unless otherwise indicated, the constants and types below are

526

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

527

528

# Constants

529

E_SUCCESS = 0

530

E_INTERRUPTED = -52

531

E_AGAIN = -28

532

CRT_OPENPGP = 2

533

CLIENT = 2

534

SHUT_RDWR = 0

535

CRD_CERTIFICATE = 1

536

E_NO_CERTIFICATE_FOUND = -49

537

OPENPGP_FMT_RAW = 0 # gnutls/openpgp.h

538

539

# Types

540

class session_int(ctypes.Structure):

541

_fields_ = []

542

session_t = ctypes.POINTER(session_int)

543

544

class certificate_credentials_st(ctypes.Structure):

545

_fields_ = []

546

certificate_credentials_t = ctypes.POINTER(

547

certificate_credentials_st)

548

certificate_type_t = ctypes.c_int

549

550

class datum_t(ctypes.Structure):

551

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

552

('size', ctypes.c_uint)]

553

554

class openpgp_crt_int(ctypes.Structure):

555

_fields_ = []

556

openpgp_crt_t = ctypes.POINTER(openpgp_crt_int)

557

openpgp_crt_fmt_t = ctypes.c_int # gnutls/openpgp.h

558

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

559

credentials_type_t = ctypes.c_int

560

transport_ptr_t = ctypes.c_void_p

561

close_request_t = ctypes.c_int

562

563

# Exceptions

564

class Error(Exception):

565

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

566

# exception might be raised from within GnuTLS.__init__,

567

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

568

# global variable has happened.

569

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

570

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

571

# code is passed, convert it to a string with

572

# gnutls.strerror()

573

self.code = code

574

if message is None and code is not None:

575

message = GnuTLS.strerror(code)

576

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

577

message, *args)

578

579

class CertificateSecurityError(Error):

580

pass

581

582

# Classes

583

class Credentials(object):

584

def __init__(self):

585

self._c_object = gnutls.certificate_credentials_t()

586

gnutls.certificate_allocate_credentials(

587

ctypes.byref(self._c_object))

588

self.type = gnutls.CRD_CERTIFICATE

589

590

def __del__(self):

591

gnutls.certificate_free_credentials(self._c_object)

592

593

class ClientSession(object):

594

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

595

self._c_object = gnutls.session_t()

596

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

597

gnutls.set_default_priority(self._c_object)

598

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

599

gnutls.handshake_set_private_extensions(self._c_object,

600

True)

601

self.socket = socket

602

if credentials is None:

603

credentials = gnutls.Credentials()

604

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

605

ctypes.cast(credentials._c_object,

606

ctypes.c_void_p))

607

self.credentials = credentials

608

609

def __del__(self):

610

gnutls.deinit(self._c_object)

611

612

def handshake(self):

613

return gnutls.handshake(self._c_object)

614

615

def send(self, data):

616

data = bytes(data)

617

data_len = len(data)

618

while data_len > 0:

619

data_len -= gnutls.record_send(self._c_object,

620

data[-data_len:],

621

data_len)

622

623

def bye(self):

624

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

625

626

# Error handling functions

627

def _error_code(result):

628

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

629

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

630

if result >= 0:

631

return result

632

if result == gnutls.E_NO_CERTIFICATE_FOUND:

633

raise gnutls.CertificateSecurityError(code=result)

634

raise gnutls.Error(code=result)

635

636

def _retry_on_error(result, func, arguments):

637

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

638

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

639

while result < 0:

640

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

641

return _error_code(result)

642

result = func(*arguments)

643

return result

644

645

# Unless otherwise indicated, the function declarations below are

646

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

647

648

# Functions

649

priority_set_direct = _library.gnutls_priority_set_direct

650

priority_set_direct.argtypes = [session_t, ctypes.c_char_p,

651

ctypes.POINTER(ctypes.c_char_p)]

652

priority_set_direct.restype = _error_code

653

654

init = _library.gnutls_init

655

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

656

init.restype = _error_code

657

658

set_default_priority = _library.gnutls_set_default_priority

659

set_default_priority.argtypes = [session_t]

660

set_default_priority.restype = _error_code

661

662

record_send = _library.gnutls_record_send

663

record_send.argtypes = [session_t, ctypes.c_void_p,

664

ctypes.c_size_t]

665

record_send.restype = ctypes.c_ssize_t

666

record_send.errcheck = _retry_on_error

667

668

certificate_allocate_credentials = (

669

_library.gnutls_certificate_allocate_credentials)

670

certificate_allocate_credentials.argtypes = [

671

ctypes.POINTER(certificate_credentials_t)]

672

certificate_allocate_credentials.restype = _error_code

673

674

certificate_free_credentials = (

675

_library.gnutls_certificate_free_credentials)

676

certificate_free_credentials.argtypes = [

677

certificate_credentials_t]

678

certificate_free_credentials.restype = None

679

680

handshake_set_private_extensions = (

681

_library.gnutls_handshake_set_private_extensions)

682

handshake_set_private_extensions.argtypes = [session_t,

683

ctypes.c_int]

684

handshake_set_private_extensions.restype = None

685

686

credentials_set = _library.gnutls_credentials_set

687

credentials_set.argtypes = [session_t, credentials_type_t,

688

ctypes.c_void_p]

689

credentials_set.restype = _error_code

690

691

strerror = _library.gnutls_strerror

692

strerror.argtypes = [ctypes.c_int]

693

strerror.restype = ctypes.c_char_p

694

695

certificate_type_get = _library.gnutls_certificate_type_get

696

certificate_type_get.argtypes = [session_t]

697

certificate_type_get.restype = _error_code

698

699

certificate_get_peers = _library.gnutls_certificate_get_peers

700

certificate_get_peers.argtypes = [session_t,

701

ctypes.POINTER(ctypes.c_uint)]

702

certificate_get_peers.restype = ctypes.POINTER(datum_t)

703

704

global_set_log_level = _library.gnutls_global_set_log_level

705

global_set_log_level.argtypes = [ctypes.c_int]

706

global_set_log_level.restype = None

707

708

global_set_log_function = _library.gnutls_global_set_log_function

709

global_set_log_function.argtypes = [log_func]

710

global_set_log_function.restype = None

711

712

deinit = _library.gnutls_deinit

713

deinit.argtypes = [session_t]

714

deinit.restype = None

715

716

handshake = _library.gnutls_handshake

717

handshake.argtypes = [session_t]

718

handshake.restype = _error_code

719

handshake.errcheck = _retry_on_error

720

721

transport_set_ptr = _library.gnutls_transport_set_ptr

722

transport_set_ptr.argtypes = [session_t, transport_ptr_t]

723

transport_set_ptr.restype = None

724

725

bye = _library.gnutls_bye

726

bye.argtypes = [session_t, close_request_t]

727

bye.restype = _error_code

728

bye.errcheck = _retry_on_error

729

730

check_version = _library.gnutls_check_version

731

check_version.argtypes = [ctypes.c_char_p]

732

check_version.restype = ctypes.c_char_p

733

734

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

735

736

openpgp_crt_init = _library.gnutls_openpgp_crt_init

737

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

738

openpgp_crt_init.restype = _error_code

739

740

openpgp_crt_import = _library.gnutls_openpgp_crt_import

741

openpgp_crt_import.argtypes = [openpgp_crt_t,

742

ctypes.POINTER(datum_t),

743

openpgp_crt_fmt_t]

744

openpgp_crt_import.restype = _error_code

745

746

openpgp_crt_verify_self = _library.gnutls_openpgp_crt_verify_self

747

openpgp_crt_verify_self.argtypes = [openpgp_crt_t, ctypes.c_uint,

748

ctypes.POINTER(ctypes.c_uint)]

749

openpgp_crt_verify_self.restype = _error_code

750

751

openpgp_crt_deinit = _library.gnutls_openpgp_crt_deinit

752

openpgp_crt_deinit.argtypes = [openpgp_crt_t]

753

openpgp_crt_deinit.restype = None

754

755

openpgp_crt_get_fingerprint = (

756

_library.gnutls_openpgp_crt_get_fingerprint)

757

openpgp_crt_get_fingerprint.argtypes = [openpgp_crt_t,

758

ctypes.c_void_p,

759

ctypes.POINTER(

760

ctypes.c_size_t)]

761

openpgp_crt_get_fingerprint.restype = _error_code

762

763

# Remove non-public functions

764

del _error_code, _retry_on_error

765

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

766

gnutls = GnuTLS()

767

768

769

438

def call_pipe(connection, # : multiprocessing.Connection

770

439

func, *args, **kwargs):

771

440

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

772

441

773

442

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

774

443

return value on the provided multiprocessing.Connection.

775

444

"""

776

445

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

777

446

connection.close()

778

447

779

780

448

class Client(object):

781

449

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

782

450

783

451

Attributes:

784

452

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

785

453

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

787

455

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

788

456

to see if the client lives.

789

457

'None' if no process is running.

790

checker_callback_tag: a GLib event source tag, or None

458

checker_callback_tag: a gobject event source tag, or None

791

459

checker_command: string; External command which is run to check

792

460

if client lives. %() expansions are done at

793

461

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

794

462

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

795

checker_initiator_tag: a GLib event source tag, or None

463

checker_initiator_tag: a gobject event source tag, or None

796

464

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

797

465

client_structure: Object describing what attributes a client has

798

466

and is used for storing the client at exit

799

467

current_checker_command: string; current running checker_command

800

disable_initiator_tag: a GLib event source tag, or None

468

disable_initiator_tag: a gobject event source tag, or None

801

469

enabled: bool()

802

470

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

803

471

uniquely identify the client

822

490

disabled, or None

823

491

server_settings: The server_settings dict from main()

824

492

"""

825

493

826

494

runtime_expansions = ("approval_delay", "approval_duration",

827

495

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

828

496

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

839

507

"approved_by_default": "True",

840

508

"enabled": "True",

841

509

}

842

510

843

511

@staticmethod

844

512

def config_parser(config):

845

513

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

852

520

for client_name in config.sections():

853

521

section = dict(config.items(client_name))

854

522

client = settings[client_name] = {}

855

523

856

524

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

857

525

# Reformat values from string types to Python types

858

526

client["approved_by_default"] = config.getboolean(

859

527

client_name, "approved_by_default")

860

528

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

861

529

"enabled")

862

530

863

531

# Uppercase and remove spaces from fingerprint for later

864

532

# comparison purposes with return value from the

865

533

# fingerprint() function

866

534

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

867

535

.replace(" ", ""))

868

536

if "secret" in section:

869

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

870

.encode("utf-8"),

871

"base64")

537

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

872

538

elif "secfile" in section:

873

539

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

874

540

(section["secfile"])),

889

555

client["last_approval_request"] = None

890

556

client["last_checked_ok"] = None

891

557

client["last_checker_status"] = -2

892

558

893

559

return settings

894

895

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

560

561

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

896

562

self.name = name

897

563

if server_settings is None:

898

564

server_settings = {}

900

566

# adding all client settings

901

567

for setting, value in settings.items():

902

568

setattr(self, setting, value)

903

569

904

570

if self.enabled:

905

571

if not hasattr(self, "last_enabled"):

906

572

self.last_enabled = datetime.datetime.utcnow()

910

576

else:

911

577

self.last_enabled = None

912

578

self.expires = None

913

579

914

580

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

915

581

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

916

582

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

917

583

datetime.datetime.utcnow())

918

584

919

585

# attributes specific for this server instance

920

586

self.checker = None

921

587

self.checker_initiator_tag = None

927

593

self.changedstate = multiprocessing_manager.Condition(

928

594

multiprocessing_manager.Lock())

929

595

self.client_structure = [attr

930

for attr in self.__dict__.keys()

596

for attr in self.__dict__.iterkeys()

931

597

if not attr.startswith("_")]

932

598

self.client_structure.append("client_structure")

933

599

934

600

for name, t in inspect.getmembers(

935

601

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

936

602

if not name.startswith("_"):

937

603

self.client_structure.append(name)

938

604

939

605

# Send notice to process children that client state has changed

940

606

def send_changedstate(self):

941

607

with self.changedstate:

942

608

self.changedstate.notify_all()

943

609

944

610

def enable(self):

945

611

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

946

612

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

951

617

self.last_enabled = datetime.datetime.utcnow()

952

618

self.init_checker()

953

619

self.send_changedstate()

954

620

955

621

def disable(self, quiet=True):

956

622

"""Disable this client."""

957

623

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

959

625

if not quiet:

960

626

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

961

627

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

962

GLib.source_remove(self.disable_initiator_tag)

628

gobject.source_remove(self.disable_initiator_tag)

963

629

self.disable_initiator_tag = None

964

630

self.expires = None

965

631

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

966

GLib.source_remove(self.checker_initiator_tag)

632

gobject.source_remove(self.checker_initiator_tag)

967

633

self.checker_initiator_tag = None

968

634

self.stop_checker()

969

635

self.enabled = False

970

636

if not quiet:

971

637

self.send_changedstate()

972

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

638

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

973

639

return False

974

640

975

641

def __del__(self):

976

642

self.disable()

977

643

978

644

def init_checker(self):

979

645

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

980

646

# and every interval from then on.

981

647

if self.checker_initiator_tag is not None:

982

GLib.source_remove(self.checker_initiator_tag)

983

self.checker_initiator_tag = GLib.timeout_add(

648

gobject.source_remove(self.checker_initiator_tag)

649

self.checker_initiator_tag = gobject.timeout_add(

984

650

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

985

651

self.start_checker)

986

652

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

987

653

if self.disable_initiator_tag is not None:

988

GLib.source_remove(self.disable_initiator_tag)

989

self.disable_initiator_tag = GLib.timeout_add(

654

gobject.source_remove(self.disable_initiator_tag)

655

self.disable_initiator_tag = gobject.timeout_add(

990

656

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

991

657

# Also start a new checker *right now*.

992

658

self.start_checker()

993

659

994

660

def checker_callback(self, source, condition, connection,

995

661

command):

996

662

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

999

665

# Read return code from connection (see call_pipe)

1000

666

returncode = connection.recv()

1001

667

connection.close()

1002

668

1003

669

if returncode >= 0:

1004

670

self.last_checker_status = returncode

1005

671

self.last_checker_signal = None

1015

681

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

1016

682

vars(self))

1017

683

return False

1018

684

1019

685

def checked_ok(self):

1020

686

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

1021

687

self.last_checked_ok = datetime.datetime.utcnow()

1022

688

self.last_checker_status = 0

1023

689

self.last_checker_signal = None

1024

690

self.bump_timeout()

1025

691

1026

692

def bump_timeout(self, timeout=None):

1027

693

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

1028

694

if timeout is None:

1029

695

timeout = self.timeout

1030

696

if self.disable_initiator_tag is not None:

1031

GLib.source_remove(self.disable_initiator_tag)

697

gobject.source_remove(self.disable_initiator_tag)

1032

698

self.disable_initiator_tag = None

1033

699

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

1034

self.disable_initiator_tag = GLib.timeout_add(

700

self.disable_initiator_tag = gobject.timeout_add(

1035

701

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

1036

702

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

1037

703

1038

704

def need_approval(self):

1039

705

self.last_approval_request = datetime.datetime.utcnow()

1040

706

1041

707

def start_checker(self):

1042

708

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

1043

709

1044

710

If a checker already exists, leave it running and do

1045

711

nothing."""

1046

712

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

1051

717

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

1052

718

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

1053

719

# should be.

1054

720

1055

721

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

1056

722

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

1057

723

self.checker.join()

1061

727

# Escape attributes for the shell

1062

728

escaped_attrs = {

1063

729

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

1064

for attr in self.runtime_expansions}

730

for attr in self.runtime_expansions }

1065

731

try:

1066

732

command = self.checker_command % escaped_attrs

1067

733

except TypeError as error:

1079

745

# The exception is when not debugging but nevertheless

1080

746

# running in the foreground; use the previously

1081

747

# created wnull.

1082

popen_args = {"close_fds": True,

1083

"shell": True,

1084

"cwd": "/"}

748

popen_args = { "close_fds": True,

749

"shell": True,

750

"cwd": "/" }

1085

751

if (not self.server_settings["debug"]

1086

752

and self.server_settings["foreground"]):

1087

753

popen_args.update({"stdout": wnull,

1088

"stderr": wnull})

1089

pipe = multiprocessing.Pipe(duplex=False)

754

"stderr": wnull })

755

pipe = multiprocessing.Pipe(duplex = False)

1090

756

self.checker = multiprocessing.Process(

1091

target=call_pipe,

1092

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

1093

kwargs=popen_args)

757

target = call_pipe,

758

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

759

kwargs = popen_args)

1094

760

self.checker.start()

1095

self.checker_callback_tag = GLib.io_add_watch(

1096

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

761

self.checker_callback_tag = gobject.io_add_watch(

762

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

1097

763

self.checker_callback, pipe[0], command)

1098

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

764

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

1099

765

return True

1100

766

1101

767

def stop_checker(self):

1102

768

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

1103

769

if self.checker_callback_tag:

1104

GLib.source_remove(self.checker_callback_tag)

770

gobject.source_remove(self.checker_callback_tag)

1105

771

self.checker_callback_tag = None

1106

772

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

1107

773

return

1116

782

byte_arrays=False):

1117

783

"""Decorators for marking methods of a DBusObjectWithProperties to

1118

784

become properties on the D-Bus.

1119

785

1120

786

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

1121

787

and with one argument by "Set".

1122

788

1123

789

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

1124

790

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

1125

791

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

1129

795

if byte_arrays and signature != "ay":

1130

796

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

1131

797

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

1132

798

1133

799

def decorator(func):

1134

800

func._dbus_is_property = True

1135

801

func._dbus_interface = dbus_interface

1138

804

func._dbus_name = func.__name__

1139

805

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

1140

806

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

1141

func._dbus_get_args_options = {'byte_arrays': byte_arrays}

807

func._dbus_get_args_options = {'byte_arrays': byte_arrays }

1142

808

return func

1143

809

1144

810

return decorator

1145

811

1146

812

1147

813

def dbus_interface_annotations(dbus_interface):

1148

814

"""Decorator for marking functions returning interface annotations

1149

815

1150

816

Usage:

1151

817

1152

818

@dbus_interface_annotations("org.example.Interface")

1153

819

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

1154

820

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

1155

821

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

1156

822

"false"}

1157

823

"""

1158

824

1159

825

def decorator(func):

1160

826

func._dbus_is_interface = True

1161

827

func._dbus_interface = dbus_interface

1162

828

func._dbus_name = dbus_interface

1163

829

return func

1164

830

1165

831

return decorator

1166

832

1167

833

1168

834

def dbus_annotations(annotations):

1169

835

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

1170

836

Usage:

1171

837

1172

838

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

1173

839

"org.freedesktop.DBus.Property."

1174

840

"EmitsChangedSignal": "false"})

1176

842

access="r")

1177

843

def Property_dbus_property(self):

1178

844

return dbus.Boolean(False)

1179

845

1180

846

See also the DBusObjectWithAnnotations class.

1181

847

"""

1182

848

1183

849

def decorator(func):

1184

850

func._dbus_annotations = annotations

1185

851

return func

1186

852

1187

853

return decorator

1188

854

1189

855

1207

873

1208

874

class DBusObjectWithAnnotations(dbus.service.Object):

1209

875

"""A D-Bus object with annotations.

1210

876

1211

877

Classes inheriting from this can use the dbus_annotations

1212

878

decorator to add annotations to methods or signals.

1213

879

"""

1214

880

1215

881

@staticmethod

1216

882

def _is_dbus_thing(thing):

1217

883

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

1218

884

1219

885

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

1220

886

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

1221

887

"""

1222

888

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

1223

889

False)

1224

890

1225

891

def _get_all_dbus_things(self, thing):

1226

892

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

1227

893

"""

1230

896

for cls in self.__class__.__mro__

1231

897

for name, athing in

1232

898

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

1233

899

1234

900

@dbus.service.method(dbus.INTROSPECTABLE_IFACE,

1235

out_signature="s",

1236

path_keyword='object_path',

1237

connection_keyword='connection')

901

out_signature = "s",

902

path_keyword = 'object_path',

903

connection_keyword = 'connection')

1238

904

def Introspect(self, object_path, connection):

1239

905

"""Overloading of standard D-Bus method.

1240

906

1241

907

Inserts annotation tags on methods and signals.

1242

908

"""

1243

909

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

1244

910

connection)

1245

911

try:

1246

912

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

1247

913

1248

914

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

1249

915

# Add annotation tags

1250

916

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

1277

943

if_tag.appendChild(ann_tag)

1278

944

# Fix argument name for the Introspect method itself

1279

945

if (if_tag.getAttribute("name")

1280

== dbus.INTROSPECTABLE_IFACE):

946

== dbus.INTROSPECTABLE_IFACE):

1281

947

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

1282

948

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

1283

949

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

1296

962

1297

963

class DBusObjectWithProperties(DBusObjectWithAnnotations):

1298

964

"""A D-Bus object with properties.

1299

965

1300

966

Classes inheriting from this can use the dbus_service_property

1301

967

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

1302

968

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

1303

969

"""

1304

970

1305

971

def _get_dbus_property(self, interface_name, property_name):

1306

972

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

1307

973

property with the specified name and interface.

1312

978

if (value._dbus_name == property_name

1313

979

and value._dbus_interface == interface_name):

1314

980

return value.__get__(self)

1315

981

1316

982

# No such property

1317

983

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

1318

984

self.dbus_object_path, interface_name, property_name))

1319

985

1320

986

@classmethod

1321

987

def _get_all_interface_names(cls):

1322

988

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

1325

991

for x in (inspect.getmro(cls))

1326

992

for attr in dir(x))

1327

993

if name is not None)

1328

994

1329

995

@dbus.service.method(dbus.PROPERTIES_IFACE,

1330

996

in_signature="ss",

1331

997

out_signature="v")

1339

1005

if not hasattr(value, "variant_level"):

1340

1006

return value

1341

1007

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

1342

1008

1343

1009

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

1344

1010

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

1345

1011

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

1357

1023

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

1358

1024

for byte in value))

1359

1025

prop(value)

1360

1026

1361

1027

@dbus.service.method(dbus.PROPERTIES_IFACE,

1362

1028

in_signature="s",

1363

1029

out_signature="a{sv}")

1364

1030

def GetAll(self, interface_name):

1365

1031

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

1366

1032

standard.

1367

1033

1368

1034

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

1369

1035

"""

1370

1036

properties = {}

1381

1047

properties[name] = value

1382

1048

continue

1383

1049

properties[name] = type(value)(

1384

value, variant_level=value.variant_level + 1)

1050

value, variant_level = value.variant_level + 1)

1385

1051

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

1386

1052

1387

1053

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

1388

1054

def PropertiesChanged(self, interface_name, changed_properties,

1389

1055

invalidated_properties):

1391

1057

standard.

1392

1058

"""

1393

1059

pass

1394

1060

1395

1061

@dbus.service.method(dbus.INTROSPECTABLE_IFACE,

1396

1062

out_signature="s",

1397

1063

path_keyword='object_path',

1398

1064

connection_keyword='connection')

1399

1065

def Introspect(self, object_path, connection):

1400

1066

"""Overloading of standard D-Bus method.

1401

1067

1402

1068

Inserts property tags and interface annotation tags.

1403

1069

"""

1404

1070

xmlstring = DBusObjectWithAnnotations.Introspect(self,

1406

1072

connection)

1407

1073

try:

1408

1074

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

1409

1075

1410

1076

def make_tag(document, name, prop):

1411

1077

e = document.createElement("property")

1412

1078

e.setAttribute("name", name)

1413

1079

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

1414

1080

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

1415

1081

return e

1416

1082

1417

1083

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

1418

1084

# Add property tags

1419

1085

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

1461

1127

exc_info=error)

1462

1128

return xmlstring

1463

1129

1464

1465

1130

try:

1466

1131

dbus.OBJECT_MANAGER_IFACE

1467

1132

except AttributeError:

1468

1133

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

1469

1134

1470

1471

1135

class DBusObjectWithObjectManager(DBusObjectWithAnnotations):

1472

1136

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

1473

1137

1474

1138

Classes inheriting from this exposes the standard

1475

1139

GetManagedObjects call and the InterfacesAdded and

1476

1140

InterfacesRemoved signals on the standard

1477

1141

"org.freedesktop.DBus.ObjectManager" interface.

1478

1142

1479

1143

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

1480

1144

manually.

1481

1145

"""

1482

1146

@dbus.service.method(dbus.OBJECT_MANAGER_IFACE,

1483

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

1147

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

1484

1148

def GetManagedObjects(self):

1485

1149

"""This function must be overridden"""

1486

1150

raise NotImplementedError()

1487

1151

1488

1152

@dbus.service.signal(dbus.OBJECT_MANAGER_IFACE,

1489

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

1153

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

1490

1154

def InterfacesAdded(self, object_path, interfaces_and_properties):

1491

1155

pass

1492

1493

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

1156

1157

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

1494

1158

def InterfacesRemoved(self, object_path, interfaces):

1495

1159

pass

1496

1160

1497

1161

@dbus.service.method(dbus.INTROSPECTABLE_IFACE,

1498

out_signature="s",

1499

path_keyword='object_path',

1500

connection_keyword='connection')

1162

out_signature = "s",

1163

path_keyword = 'object_path',

1164

connection_keyword = 'connection')

1501

1165

def Introspect(self, object_path, connection):

1502

1166

"""Overloading of standard D-Bus method.

1503

1167

1504

1168

Override return argument name of GetManagedObjects to be

1505

1169

"objpath_interfaces_and_properties"

1506

1170

"""

1509

1173

connection)

1510

1174

try:

1511

1175

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

1512

1176

1513

1177

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

1514

1178

# Fix argument name for the GetManagedObjects method

1515

1179

if (if_tag.getAttribute("name")

1516

== dbus.OBJECT_MANAGER_IFACE):

1180

== dbus.OBJECT_MANAGER_IFACE):

1517

1181

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

1518

1182

if (cn.getAttribute("name")

1519

1183

== "GetManagedObjects"):

1529

1193

except (AttributeError, xml.dom.DOMException,

1530

1194

xml.parsers.expat.ExpatError) as error:

1531

1195

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

1532

exc_info=error)

1196

exc_info = error)

1533

1197

return xmlstring

1534

1198

1535

1536

1199

def datetime_to_dbus(dt, variant_level=0):

1537

1200

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

1538

1201

if dt is None:

1539

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

1202

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

1540

1203

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

1541

1204

1542

1205

1545

1208

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

1546

1209

interface names according to the "alt_interface_names" mapping.

1547

1210

Usage:

1548

1211

1549

1212

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

1550

1213

"net.example.AlternateInterface"})

1551

1214

class SampleDBusObject(dbus.service.Object):

1552

1215

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

1553

1216

def SampleDBusMethod():

1554

1217

pass

1555

1218

1556

1219

The above "SampleDBusMethod" on "SampleDBusObject" will be

1557

1220

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

1558

1221

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

1559

1222

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

1560

1223

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

1561

1224

1562

1225

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

1563

1226

(from DBusObjectWithProperties) and interfaces (from the

1564

1227

dbus_interface_annotations decorator).

1565

1228

"""

1566

1229

1567

1230

def wrapper(cls):

1568

1231

for orig_interface_name, alt_interface_name in (

1569

1232

alt_interface_names.items()):

1584

1247

interface_names.add(alt_interface)

1585

1248

# Is this a D-Bus signal?

1586

1249

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

1587

# Extract the original non-method undecorated

1588

# function by black magic

1589

1250

if sys.version_info.major == 2:

1251

# Extract the original non-method undecorated

1252

# function by black magic

1590

1253

nonmethod_func = (dict(

1591

1254

zip(attribute.func_code.co_freevars,

1592

1255

attribute.__closure__))

1593

1256

["func"].cell_contents)

1594

1257

else:

1595

nonmethod_func = (dict(

1596

zip(attribute.__code__.co_freevars,

1597

attribute.__closure__))

1598

["func"].cell_contents)

1258

nonmethod_func = attribute

1599

1259

# Create a new, but exactly alike, function

1600

1260

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

1601

1261

# with the alternate D-Bus interface name

1602

new_function = copy_function(nonmethod_func)

1262

if sys.version_info.major == 2:

1263

new_function = types.FunctionType(

1264

nonmethod_func.func_code,

1265

nonmethod_func.func_globals,

1266

nonmethod_func.func_name,

1267

nonmethod_func.func_defaults,

1268

nonmethod_func.func_closure)

1269

else:

1270

new_function = types.FunctionType(

1271

nonmethod_func.__code__,

1272

nonmethod_func.__globals__,

1273

nonmethod_func.__name__,

1274

nonmethod_func.__defaults__,

1275

nonmethod_func.__closure__)

1603

1276

new_function = (dbus.service.signal(

1604

1277

alt_interface,

1605

1278

attribute._dbus_signature)(new_function))

1609

1282

attribute._dbus_annotations)

1610

1283

except AttributeError:

1611

1284

pass

1612

1613

1285

# Define a creator of a function to call both the

1614

1286

# original and alternate functions, so both the

1615

1287

# original and alternate signals gets sent when

1618

1290

"""This function is a scope container to pass

1619

1291

func1 and func2 to the "call_both" function

1620

1292

outside of its arguments"""

1621

1293

1622

1294

@functools.wraps(func2)

1623

1295

def call_both(*args, **kwargs):

1624

1296

"""This function will emit two D-Bus

1625

1297

signals by calling func1 and func2"""

1626

1298

func1(*args, **kwargs)

1627

1299

func2(*args, **kwargs)

1628

# Make wrapper function look like a D-Bus

1629

# signal

1300

# Make wrapper function look like a D-Bus signal

1630

1301

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

1631

1302

if name.startswith("_dbus_"):

1632

1303

setattr(call_both, name, attr)

1633

1304

1634

1305

return call_both

1635

1306

# Create the "call_both" function and add it to

1636

1307

# the class

1646

1317

alt_interface,

1647

1318

attribute._dbus_in_signature,

1648

1319

attribute._dbus_out_signature)

1649

(copy_function(attribute)))

1320

(types.FunctionType(attribute.func_code,

1321

attribute.func_globals,

1322

attribute.func_name,

1323

attribute.func_defaults,

1324

attribute.func_closure)))

1650

1325

# Copy annotations, if any

1651

1326

try:

1652

1327

attr[attrname]._dbus_annotations = dict(

1664

1339

attribute._dbus_access,

1665

1340

attribute._dbus_get_args_options

1666

1341

["byte_arrays"])

1667

(copy_function(attribute)))

1342

(types.FunctionType(

1343

attribute.func_code,

1344

attribute.func_globals,

1345

attribute.func_name,

1346

attribute.func_defaults,

1347

attribute.func_closure)))

1668

1348

# Copy annotations, if any

1669

1349

try:

1670

1350

attr[attrname]._dbus_annotations = dict(

1679

1359

# to the class.

1680

1360

attr[attrname] = (

1681

1361

dbus_interface_annotations(alt_interface)

1682

(copy_function(attribute)))

1362

(types.FunctionType(attribute.func_code,

1363

attribute.func_globals,

1364

attribute.func_name,

1365

attribute.func_defaults,

1366

attribute.func_closure)))

1683

1367

if deprecate:

1684

1368

# Deprecate all alternate interfaces

1685

iname = "_AlternateDBusNames_interface_annotation{}"

1369

iname="_AlternateDBusNames_interface_annotation{}"

1686

1370

for interface_name in interface_names:

1687

1371

1688

1372

@dbus_interface_annotations(interface_name)

1689

1373

def func(self):

1690

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

1691

"true"}

1374

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

1375

"true" }

1692

1376

# Find an unused name

1693

1377

for aname in (iname.format(i)

1694

1378

for i in itertools.count()):

1698

1382

if interface_names:

1699

1383

# Replace the class with a new subclass of it with

1700

1384

# methods, signals, etc. as created above.

1701

if sys.version_info.major == 2:

1702

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

1703

(cls, ), attr)

1704

else:

1705

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

1706

(cls, ), attr)

1385

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

1386

(cls, ), attr)

1707

1387

return cls

1708

1388

1709

1389

return wrapper

1710

1390

1711

1391

1713

1393

"se.bsnet.fukt.Mandos"})

1714

1394

class ClientDBus(Client, DBusObjectWithProperties):

1715

1395

"""A Client class using D-Bus

1716

1396

1717

1397

Attributes:

1718

1398

dbus_object_path: dbus.ObjectPath

1719

1399

bus: dbus.SystemBus()

1720

1400

"""

1721

1401

1722

1402

runtime_expansions = (Client.runtime_expansions

1723

1403

+ ("dbus_object_path", ))

1724

1404

1725

1405

_interface = "se.recompile.Mandos.Client"

1726

1406

1727

1407

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

1728

1729

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

1408

1409

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

1730

1410

self.bus = bus

1731

1411

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

1732

1412

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

1738

1418

"/clients/" + client_object_name)

1739

1419

DBusObjectWithProperties.__init__(self, self.bus,

1740

1420

self.dbus_object_path)

1741

1421

1742

1422

def notifychangeproperty(transform_func, dbus_name,

1743

1423

type_func=lambda x: x,

1744

1424

variant_level=1,

1746

1426

_interface=_interface):

1747

1427

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

1748

1428

its changes to DBus.

1749

1429

1750

1430

transform_fun: Function that takes a value and a variant_level

1751

1431

and transforms it to a D-Bus type.

1752

1432

dbus_name: D-Bus name of the variable

1755

1435

variant_level: D-Bus variant level. Default: 1

1756

1436

"""

1757

1437

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

1758

1438

1759

1439

def setter(self, value):

1760

1440

if hasattr(self, "dbus_object_path"):

1761

1441

if (not hasattr(self, attrname) or

1768

1448

else:

1769

1449

dbus_value = transform_func(

1770

1450

type_func(value),

1771

variant_level=variant_level)

1451

variant_level = variant_level)

1772

1452

self.PropertyChanged(dbus.String(dbus_name),

1773

1453

dbus_value)

1774

1454

self.PropertiesChanged(

1775

1455

_interface,

1776

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

1777

dbus_value}),

1456

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

1457

dbus_value }),

1778

1458

dbus.Array())

1779

1459

setattr(self, attrname, value)

1780

1460

1781

1461

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

1782

1462

1783

1463

expires = notifychangeproperty(datetime_to_dbus, "Expires")

1784

1464

approvals_pending = notifychangeproperty(dbus.Boolean,

1785

1465

"ApprovalPending",

1786

type_func=bool)

1466

type_func = bool)

1787

1467

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

1788

1468

last_enabled = notifychangeproperty(datetime_to_dbus,

1789

1469

"LastEnabled")

1790

1470

checker = notifychangeproperty(

1791

1471

dbus.Boolean, "CheckerRunning",

1792

type_func=lambda checker: checker is not None)

1472

type_func = lambda checker: checker is not None)

1793

1473

last_checked_ok = notifychangeproperty(datetime_to_dbus,

1794

1474

"LastCheckedOK")

1795

1475

last_checker_status = notifychangeproperty(dbus.Int16,

1800

1480

"ApprovedByDefault")

1801

1481

approval_delay = notifychangeproperty(

1802

1482

dbus.UInt64, "ApprovalDelay",

1803

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

1483

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

1804

1484

approval_duration = notifychangeproperty(

1805

1485

dbus.UInt64, "ApprovalDuration",

1806

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

1486

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

1807

1487

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

1808

1488

timeout = notifychangeproperty(

1809

1489

dbus.UInt64, "Timeout",

1810

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

1490

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

1811

1491

extended_timeout = notifychangeproperty(

1812

1492

dbus.UInt64, "ExtendedTimeout",

1813

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

1493

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

1814

1494

interval = notifychangeproperty(

1815

1495

dbus.UInt64, "Interval",

1816

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

1496

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

1817

1497

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

1818

1498

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

1819

1499

invalidate_only=True)

1820

1500

1821

1501

del notifychangeproperty

1822

1502

1823

1503

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

1824

1504

try:

1825

1505

self.remove_from_connection()

1828

1508

if hasattr(DBusObjectWithProperties, "__del__"):

1829

1509

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

1830

1510

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

1831

1511

1832

1512

def checker_callback(self, source, condition,

1833

1513

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

1834

1514

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

1850

1530

| self.last_checker_signal),

1851

1531

dbus.String(command))

1852

1532

return ret

1853

1533

1854

1534

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

1855

1535

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

1856

1536

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

1860

1540

# Emit D-Bus signal

1861

1541

self.CheckerStarted(self.current_checker_command)

1862

1542

return r

1863

1543

1864

1544

def _reset_approved(self):

1865

1545

self.approved = None

1866

1546

return False

1867

1547

1868

1548

def approve(self, value=True):

1869

1549

self.approved = value

1870

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

1871

* 1000), self._reset_approved)

1550

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

1551

* 1000), self._reset_approved)

1872

1552

self.send_changedstate()

1873

1874

# D-Bus methods, signals & properties

1875

1876

# Interfaces

1877

1878

# Signals

1879

1553

1554

## D-Bus methods, signals & properties

1555

1556

## Interfaces

1557

1558

## Signals

1559

1880

1560

# CheckerCompleted - signal

1881

1561

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

1882

1562

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

1883

1563

"D-Bus signal"

1884

1564

pass

1885

1565

1886

1566

# CheckerStarted - signal

1887

1567

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

1888

1568

def CheckerStarted(self, command):

1889

1569

"D-Bus signal"

1890

1570

pass

1891

1571

1892

1572

# PropertyChanged - signal

1893

1573

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

1894

1574

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

1895

1575

def PropertyChanged(self, property, value):

1896

1576

"D-Bus signal"

1897

1577

pass

1898

1578

1899

1579

# GotSecret - signal

1900

1580

@dbus.service.signal(_interface)

1901

1581

def GotSecret(self):

1904

1584

server to mandos-client

1905

1585

"""

1906

1586

pass

1907

1587

1908

1588

# Rejected - signal

1909

1589

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

1910

1590

def Rejected(self, reason):

1911

1591

"D-Bus signal"

1912

1592

pass

1913

1593

1914

1594

# NeedApproval - signal

1915

1595

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

1916

1596

def NeedApproval(self, timeout, default):

1917

1597

"D-Bus signal"

1918

1598

return self.need_approval()

1919

1920

# Methods

1921

1599

1600

## Methods

1601

1922

1602

# Approve - method

1923

1603

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

1924

1604

def Approve(self, value):

1925

1605

self.approve(value)

1926

1606

1927

1607

# CheckedOK - method

1928

1608

@dbus.service.method(_interface)

1929

1609

def CheckedOK(self):

1930

1610

self.checked_ok()

1931

1611

1932

1612

# Enable - method

1933

1613

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

1934

1614

@dbus.service.method(_interface)

1935

1615

def Enable(self):

1936

1616

"D-Bus method"

1937

1617

self.enable()

1938

1618

1939

1619

# StartChecker - method

1940

1620

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

1941

1621

@dbus.service.method(_interface)

1942

1622

def StartChecker(self):

1943

1623

"D-Bus method"

1944

1624

self.start_checker()

1945

1625

1946

1626

# Disable - method

1947

1627

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

1948

1628

@dbus.service.method(_interface)

1949

1629

def Disable(self):

1950

1630

"D-Bus method"

1951

1631

self.disable()

1952

1632

1953

1633

# StopChecker - method

1954

1634

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

1955

1635

@dbus.service.method(_interface)

1956

1636

def StopChecker(self):

1957

1637

self.stop_checker()

1958

1959

# Properties

1960

1638

1639

## Properties

1640

1961

1641

# ApprovalPending - property

1962

1642

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

1963

1643

def ApprovalPending_dbus_property(self):

1964

1644

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

1965

1645

1966

1646

# ApprovedByDefault - property

1967

1647

@dbus_service_property(_interface,

1968

1648

signature="b",

1971

1651

if value is None: # get

1972

1652

return dbus.Boolean(self.approved_by_default)

1973

1653

self.approved_by_default = bool(value)

1974

1654

1975

1655

# ApprovalDelay - property

1976

1656

@dbus_service_property(_interface,

1977

1657

signature="t",

1981

1661

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

1982

1662

* 1000)

1983

1663

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

1984

1664

1985

1665

# ApprovalDuration - property

1986

1666

@dbus_service_property(_interface,

1987

1667

signature="t",

1991

1671

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

1992

1672

* 1000)

1993

1673

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

1994

1674

1995

1675

# Name - property

1996

1676

@dbus_annotations(

1997

1677

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

1998

1678

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

1999

1679

def Name_dbus_property(self):

2000

1680

return dbus.String(self.name)

2001

1681

2002

1682

# Fingerprint - property

2003

1683

@dbus_annotations(

2004

1684

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

2005

1685

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

2006

1686

def Fingerprint_dbus_property(self):

2007

1687

return dbus.String(self.fingerprint)

2008

1688

2009

1689

# Host - property

2010

1690

@dbus_service_property(_interface,

2011

1691

signature="s",

2014

1694

if value is None: # get

2015

1695

return dbus.String(self.host)

2016

1696

self.host = str(value)

2017

1697

2018

1698

# Created - property

2019

1699

@dbus_annotations(

2020

1700

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

2021

1701

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

2022

1702

def Created_dbus_property(self):

2023

1703

return datetime_to_dbus(self.created)

2024

1704

2025

1705

# LastEnabled - property

2026

1706

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

2027

1707

def LastEnabled_dbus_property(self):

2028

1708

return datetime_to_dbus(self.last_enabled)

2029

1709

2030

1710

# Enabled - property

2031

1711

@dbus_service_property(_interface,

2032

1712

signature="b",

2038

1718

self.enable()

2039

1719

else:

2040

1720

self.disable()

2041

1721

2042

1722

# LastCheckedOK - property

2043

1723

@dbus_service_property(_interface,

2044

1724

signature="s",

2048

1728

self.checked_ok()

2049

1729

return

2050

1730

return datetime_to_dbus(self.last_checked_ok)

2051

1731

2052

1732

# LastCheckerStatus - property

2053

1733

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

2054

1734

def LastCheckerStatus_dbus_property(self):

2055

1735

return dbus.Int16(self.last_checker_status)

2056

1736

2057

1737

# Expires - property

2058

1738

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

2059

1739

def Expires_dbus_property(self):

2060

1740

return datetime_to_dbus(self.expires)

2061

1741

2062

1742

# LastApprovalRequest - property

2063

1743

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

2064

1744

def LastApprovalRequest_dbus_property(self):

2065

1745

return datetime_to_dbus(self.last_approval_request)

2066

1746

2067

1747

# Timeout - property

2068

1748

@dbus_service_property(_interface,

2069

1749

signature="t",

2084

1764

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

2085

1765

is None):

2086

1766

return

2087

GLib.source_remove(self.disable_initiator_tag)

2088

self.disable_initiator_tag = GLib.timeout_add(

1767

gobject.source_remove(self.disable_initiator_tag)

1768

self.disable_initiator_tag = gobject.timeout_add(

2089

1769

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

2090

1770

self.disable)

2091

1771

2092

1772

# ExtendedTimeout - property

2093

1773

@dbus_service_property(_interface,

2094

1774

signature="t",

2098

1778

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

2099

1779

* 1000)

2100

1780

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

2101

1781

2102

1782

# Interval - property

2103

1783

@dbus_service_property(_interface,

2104

1784

signature="t",

2111

1791

return

2112

1792

if self.enabled:

2113

1793

# Reschedule checker run

2114

GLib.source_remove(self.checker_initiator_tag)

2115

self.checker_initiator_tag = GLib.timeout_add(

1794

gobject.source_remove(self.checker_initiator_tag)

1795

self.checker_initiator_tag = gobject.timeout_add(

2116

1796

value, self.start_checker)

2117

self.start_checker() # Start one now, too

2118

1797

self.start_checker() # Start one now, too

1798

2119

1799

# Checker - property

2120

1800

@dbus_service_property(_interface,

2121

1801

signature="s",

2124

1804

if value is None: # get

2125

1805

return dbus.String(self.checker_command)

2126

1806

self.checker_command = str(value)

2127

1807

2128

1808

# CheckerRunning - property

2129

1809

@dbus_service_property(_interface,

2130

1810

signature="b",

2136

1816

self.start_checker()

2137

1817

else:

2138

1818

self.stop_checker()

2139

1819

2140

1820

# ObjectPath - property

2141

1821

@dbus_annotations(

2142

1822

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

2143

1823

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

2144

1824

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

2145

1825

def ObjectPath_dbus_property(self):

2146

return self.dbus_object_path # is already a dbus.ObjectPath

2147

1826

return self.dbus_object_path # is already a dbus.ObjectPath

1827

2148

1828

# Secret = property

2149

1829

@dbus_annotations(

2150

1830

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

2155

1835

byte_arrays=True)

2156

1836

def Secret_dbus_property(self, value):

2157

1837

self.secret = bytes(value)

2158

1838

2159

1839

del _interface

2160

1840

2161

1841

2165

1845

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

2166

1846

if not self._pipe.recv():

2167

1847

raise KeyError(fpr)

2168

1848

2169

1849

def __getattribute__(self, name):

2170

1850

if name == '_pipe':

2171

1851

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

2174

1854

if data[0] == 'data':

2175

1855

return data[1]

2176

1856

if data[0] == 'function':

2177

1857

2178

1858

def func(*args, **kwargs):

2179

1859

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

2180

1860

return self._pipe.recv()[1]

2181

1861

2182

1862

return func

2183

1863

2184

1864

def __setattr__(self, name, value):

2185

1865

if name == '_pipe':

2186

1866

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

2189

1869

2190

1870

class ClientHandler(socketserver.BaseRequestHandler, object):

2191

1871

"""A class to handle client connections.

2192

1872

2193

1873

Instantiated once for each connection to handle it.

2194

1874

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

2195

1875

2196

1876

def handle(self):

2197

1877

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

2198

1878

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

2199

1879

str(self.client_address))

2200

1880

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

2201

1881

self.server.child_pipe.fileno())

2202

2203

session = gnutls.ClientSession(self.request)

2204

2205

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

2206

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

2207

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

2208

# "+DHE-DSS"))

1882

1883

session = gnutls.connection.ClientSession(

1884

self.request, gnutls.connection .X509Credentials())

1885

1886

# Note: gnutls.connection.X509Credentials is really a

1887

# generic GnuTLS certificate credentials object so long as

1888

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

1889

# here despite using OpenPGP certificates.

1890

1891

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

1892

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

1893

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

1894

# "+DHE-DSS"))

2209

1895

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

2210

1896

priority = self.server.gnutls_priority

2211

1897

if priority is None:

2212

1898

priority = "NORMAL"

2213

gnutls.priority_set_direct(session._c_object,

2214

priority.encode("utf-8"),

2215

None)

2216

1899

gnutls.library.functions.gnutls_priority_set_direct(

1900

session._c_object, priority, None)

1901

2217

1902

# Start communication using the Mandos protocol

2218

1903

# Get protocol number

2219

1904

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

2224

1909

except (ValueError, IndexError, RuntimeError) as error:

2225

1910

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

2226

1911

return

2227

1912

2228

1913

# Start GnuTLS connection

2229

1914

try:

2230

1915

session.handshake()

2231

except gnutls.Error as error:

1916

except gnutls.errors.GNUTLSError as error:

2232

1917

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

2233

1918

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

2234

1919

# established. Just abandon the request.

2235

1920

return

2236

1921

logger.debug("Handshake succeeded")

2237

1922

2238

1923

approval_required = False

2239

1924

try:

2240

1925

try:

2241

1926

fpr = self.fingerprint(

2242

1927

self.peer_certificate(session))

2243

except (TypeError, gnutls.Error) as error:

1928

except (TypeError,

1929

gnutls.errors.GNUTLSError) as error:

2244

1930

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

2245

1931

return

2246

1932

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

2247

1933

2248

1934

try:

2249

1935

client = ProxyClient(child_pipe, fpr,

2250

1936

self.client_address)

2251

1937

except KeyError:

2252

1938

return

2253

1939

2254

1940

if client.approval_delay:

2255

1941

delay = client.approval_delay

2256

1942

client.approvals_pending += 1

2257

1943

approval_required = True

2258

1944

2259

1945

while True:

2260

1946

if not client.enabled:

2261

1947

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

2264

1950

# Emit D-Bus signal

2265

1951

client.Rejected("Disabled")

2266

1952

return

2267

1953

2268

1954

if client.approved or not client.approval_delay:

2269

# We are approved or approval is disabled

1955

#We are approved or approval is disabled

2270

1956

break

2271

1957

elif client.approved is None:

2272

1958

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

2283

1969

# Emit D-Bus signal

2284

1970

client.Rejected("Denied")

2285

1971

return

2286

2287

# wait until timeout or approved

1972

1973

#wait until timeout or approved

2288

1974

time = datetime.datetime.now()

2289

1975

client.changedstate.acquire()

2290

1976

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

2303

1989

break

2304

1990

else:

2305

1991

delay -= time2 - time

2306

2307

try:

2308

session.send(client.secret)

2309

except gnutls.Error as error:

2310

logger.warning("gnutls send failed",

2311

exc_info=error)

2312

return

2313

1992

1993

sent_size = 0

1994

while sent_size < len(client.secret):

1995

try:

1996

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

1997

except gnutls.errors.GNUTLSError as error:

1998

logger.warning("gnutls send failed",

1999

exc_info=error)

2000

return

2001

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

2002

len(client.secret) - (sent_size

2003

+ sent))

2004

sent_size += sent

2005

2314

2006

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

2315

2007

# bump the timeout using extended_timeout

2316

2008

client.bump_timeout(client.extended_timeout)

2317

2009

if self.server.use_dbus:

2318

2010

# Emit D-Bus signal

2319

2011

client.GotSecret()

2320

2012

2321

2013

finally:

2322

2014

if approval_required:

2323

2015

client.approvals_pending -= 1

2324

2016

try:

2325

2017

session.bye()

2326

except gnutls.Error as error:

2018

except gnutls.errors.GNUTLSError as error:

2327

2019

logger.warning("GnuTLS bye failed",

2328

2020

exc_info=error)

2329

2021

2330

2022

@staticmethod

2331

2023

def peer_certificate(session):

2332

2024

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

2333

2025

# If not an OpenPGP certificate...

2334

if (gnutls.certificate_type_get(session._c_object)

2335

!= gnutls.CRT_OPENPGP):

2336

# ...return invalid data

2337

return b""

2026

if (gnutls.library.functions.gnutls_certificate_type_get(

2027

session._c_object)

2028

!= gnutls.library.constants.GNUTLS_CRT_OPENPGP):

2029

# ...do the normal thing

2030

return session.peer_certificate

2338

2031

list_size = ctypes.c_uint(1)

2339

cert_list = (gnutls.certificate_get_peers

2032

cert_list = (gnutls.library.functions

2033

.gnutls_certificate_get_peers

2340

2034

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

2341

2035

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

2342

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

2036

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

2037

" certificate")

2343

2038

if list_size.value == 0:

2344

2039

return None

2345

2040

cert = cert_list[0]

2346

2041

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

2347

2042

2348

2043

@staticmethod

2349

2044

def fingerprint(openpgp):

2350

2045

"Convert an OpenPGP bytestring to a hexdigit fingerprint"

2351

2046

# New GnuTLS "datum" with the OpenPGP public key

2352

datum = gnutls.datum_t(

2047

datum = gnutls.library.types.gnutls_datum_t(

2353

2048

ctypes.cast(ctypes.c_char_p(openpgp),

2354

2049

ctypes.POINTER(ctypes.c_ubyte)),

2355

2050

ctypes.c_uint(len(openpgp)))

2356

2051

# New empty GnuTLS certificate

2357

crt = gnutls.openpgp_crt_t()

2358

gnutls.openpgp_crt_init(ctypes.byref(crt))

2052

crt = gnutls.library.types.gnutls_openpgp_crt_t()

2053

gnutls.library.functions.gnutls_openpgp_crt_init(

2054

ctypes.byref(crt))

2359

2055

# Import the OpenPGP public key into the certificate

2360

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

2361

gnutls.OPENPGP_FMT_RAW)

2056

gnutls.library.functions.gnutls_openpgp_crt_import(

2057

crt, ctypes.byref(datum),

2058

gnutls.library.constants.GNUTLS_OPENPGP_FMT_RAW)

2362

2059

# Verify the self signature in the key

2363

2060

crtverify = ctypes.c_uint()

2364

gnutls.openpgp_crt_verify_self(crt, 0,

2365

ctypes.byref(crtverify))

2061

gnutls.library.functions.gnutls_openpgp_crt_verify_self(

2062

crt, 0, ctypes.byref(crtverify))

2366

2063

if crtverify.value != 0:

2367

gnutls.openpgp_crt_deinit(crt)

2368

raise gnutls.CertificateSecurityError("Verify failed")

2064

gnutls.library.functions.gnutls_openpgp_crt_deinit(crt)

2065

raise gnutls.errors.CertificateSecurityError(

2066

"Verify failed")

2369

2067

# New buffer for the fingerprint

2370

2068

buf = ctypes.create_string_buffer(20)

2371

2069

buf_len = ctypes.c_size_t()

2372

2070

# Get the fingerprint from the certificate into the buffer

2373

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

2374

ctypes.byref(buf_len))

2071

gnutls.library.functions.gnutls_openpgp_crt_get_fingerprint(

2072

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

2375

2073

# Deinit the certificate

2376

gnutls.openpgp_crt_deinit(crt)

2074

gnutls.library.functions.gnutls_openpgp_crt_deinit(crt)

2377

2075

# Convert the buffer to a Python bytestring

2378

2076

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

2379

2077

# Convert the bytestring to hexadecimal notation

2383

2081

2384

2082

class MultiprocessingMixIn(object):

2385

2083

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

2386

2084

2387

2085

def sub_process_main(self, request, address):

2388

2086

try:

2389

2087

self.finish_request(request, address)

2390

2088

except Exception:

2391

2089

self.handle_error(request, address)

2392

2090

self.close_request(request)

2393

2091

2394

2092

def process_request(self, request, address):

2395

2093

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

2396

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

2397

args=(request, address))

2094

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

2095

args = (request, address))

2398

2096

proc.start()

2399

2097

return proc

2400

2098

2401

2099

2402

2100

class MultiprocessingMixInWithPipe(MultiprocessingMixIn, object):

2403

2101

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

2404

2102

2405

2103

def process_request(self, request, client_address):

2406

2104

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

2407

2105

2408

2106

This function creates a new pipe in self.pipe

2409

2107

"""

2410

2108

parent_pipe, self.child_pipe = multiprocessing.Pipe()

2411

2109

2412

2110

proc = MultiprocessingMixIn.process_request(self, request,

2413

2111

client_address)

2414

2112

self.child_pipe.close()

2415

2113

self.add_pipe(parent_pipe, proc)

2416

2114

2417

2115

def add_pipe(self, parent_pipe, proc):

2418

2116

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

2419

2117

raise NotImplementedError()

2422

2120

class IPv6_TCPServer(MultiprocessingMixInWithPipe,

2423

2121

socketserver.TCPServer, object):

2424

2122

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

2425

2123

2426

2124

Attributes:

2427

2125

enabled: Boolean; whether this server is activated yet

2428

2126

interface: None or a network interface name (string)

2429

2127

use_ipv6: Boolean; to use IPv6 or not

2430

2128

"""

2431

2129

2432

2130

def __init__(self, server_address, RequestHandlerClass,

2433

2131

interface=None,

2434

2132

use_ipv6=True,

2444

2142

self.socketfd = socketfd

2445

2143

# Save the original socket.socket() function

2446

2144

self.socket_socket = socket.socket

2447

2448

2145

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

2449

#

2146

#

2450

2147

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

2451

2148

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

2452

2149

# patching socket.socket.)

2453

#

2150

#

2454

2151

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

2455

2152

@functools.wraps(socket.socket)

2456

2153

def socket_wrapper(*args, **kwargs):

2468

2165

# socket_wrapper(), if socketfd was set.

2469

2166

socketserver.TCPServer.__init__(self, server_address,

2470

2167

RequestHandlerClass)

2471

2168

2472

2169

def server_bind(self):

2473

2170

"""This overrides the normal server_bind() function

2474

2171

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

2475

2172

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

2476

global SO_BINDTODEVICE

2477

2173

if self.interface is not None:

2478

2174

if SO_BINDTODEVICE is None:

2479

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

2480

# common enough.

2481

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

2482

SO_BINDTODEVICE = 25

2483

try:

2484

self.socket.setsockopt(

2485

socket.SOL_SOCKET, SO_BINDTODEVICE,

2486

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

2487

except socket.error as error:

2488

if error.errno == errno.EPERM:

2489

logger.error("No permission to bind to"

2490

" interface %s", self.interface)

2491

elif error.errno == errno.ENOPROTOOPT:

2492

logger.error("SO_BINDTODEVICE not available;"

2493

" cannot bind to interface %s",

2494

self.interface)

2495

elif error.errno == errno.ENODEV:

2496

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

2497

" cannot bind", self.interface)

2498

else:

2499

raise

2175

logger.error("SO_BINDTODEVICE does not exist;"

2176

" cannot bind to interface %s",

2177

self.interface)

2178

else:

2179

try:

2180

self.socket.setsockopt(

2181

socket.SOL_SOCKET, SO_BINDTODEVICE,

2182

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

2183

except socket.error as error:

2184

if error.errno == errno.EPERM:

2185

logger.error("No permission to bind to"

2186

" interface %s", self.interface)

2187

elif error.errno == errno.ENOPROTOOPT:

2188

logger.error("SO_BINDTODEVICE not available;"

2189

" cannot bind to interface %s",

2190

self.interface)

2191

elif error.errno == errno.ENODEV:

2192

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

2193

" cannot bind", self.interface)

2194

else:

2195

raise

2500

2196

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

2501

2197

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

2502

2198

if not self.server_address[0]:

2503

2199

if self.address_family == socket.AF_INET6:

2504

any_address = "::" # in6addr_any

2200

any_address = "::" # in6addr_any

2505

2201

else:

2506

any_address = "0.0.0.0" # INADDR_ANY

2202

any_address = "0.0.0.0" # INADDR_ANY

2507

2203

self.server_address = (any_address,

2508

2204

self.server_address[1])

2509

2205

elif not self.server_address[1]:

2519

2215

2520

2216

class MandosServer(IPv6_TCPServer):

2521

2217

"""Mandos server.

2522

2218

2523

2219

Attributes:

2524

2220

clients: set of Client objects

2525

2221

gnutls_priority GnuTLS priority string

2526

2222

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

2527

2528

Assumes a GLib.MainLoop event loop.

2223

2224

Assumes a gobject.MainLoop event loop.

2529

2225

"""

2530

2226

2531

2227

def __init__(self, server_address, RequestHandlerClass,

2532

2228

interface=None,

2533

2229

use_ipv6=True,

2543

2239

self.gnutls_priority = gnutls_priority

2544

2240

IPv6_TCPServer.__init__(self, server_address,

2545

2241

RequestHandlerClass,

2546

interface=interface,

2547

use_ipv6=use_ipv6,

2548

socketfd=socketfd)

2549

2242

interface = interface,

2243

use_ipv6 = use_ipv6,

2244

socketfd = socketfd)

2245

2550

2246

def server_activate(self):

2551

2247

if self.enabled:

2552

2248

return socketserver.TCPServer.server_activate(self)

2553

2249

2554

2250

def enable(self):

2555

2251

self.enabled = True

2556

2252

2557

2253

def add_pipe(self, parent_pipe, proc):

2558

2254

# Call "handle_ipc" for both data and EOF events

2559

GLib.io_add_watch(

2255

gobject.io_add_watch(

2560

2256

parent_pipe.fileno(),

2561

GLib.IO_IN | GLib.IO_HUP,

2257

gobject.IO_IN | gobject.IO_HUP,

2562

2258

functools.partial(self.handle_ipc,

2563

parent_pipe=parent_pipe,

2564

proc=proc))

2565

2259

parent_pipe = parent_pipe,

2260

proc = proc))

2261

2566

2262

def handle_ipc(self, source, condition,

2567

2263

parent_pipe=None,

2568

proc=None,

2264

proc = None,

2569

2265

client_object=None):

2570

2266

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

2571

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

2267

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

2572

2268

# Wait for other process to exit

2573

2269

proc.join()

2574

2270

return False

2575

2271

2576

2272

# Read a request from the child

2577

2273

request = parent_pipe.recv()

2578

2274

command = request[0]

2579

2275

2580

2276

if command == 'init':

2581

fpr = request[1].decode("ascii")

2277

fpr = request[1]

2582

2278

address = request[2]

2583

2584

for c in self.clients.values():

2279

2280

for c in self.clients.itervalues():

2585

2281

if c.fingerprint == fpr:

2586

2282

client = c

2587

2283

break

2594

2290

address[0])

2595

2291

parent_pipe.send(False)

2596

2292

return False

2597

2598

GLib.io_add_watch(

2293

2294

gobject.io_add_watch(

2599

2295

parent_pipe.fileno(),

2600

GLib.IO_IN | GLib.IO_HUP,

2296

gobject.IO_IN | gobject.IO_HUP,

2601

2297

functools.partial(self.handle_ipc,

2602

parent_pipe=parent_pipe,

2603

proc=proc,

2604

client_object=client))

2298

parent_pipe = parent_pipe,

2299

proc = proc,

2300

client_object = client))

2605

2301

parent_pipe.send(True)

2606

2302

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

2607

2303

# same fileno

2610

2306

funcname = request[1]

2611

2307

args = request[2]

2612

2308

kwargs = request[3]

2613

2309

2614

2310

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

2615

2311

funcname)(*args,

2616

2312

**kwargs)))

2617

2313

2618

2314

if command == 'getattr':

2619

2315

attrname = request[1]

2620

2316

if isinstance(client_object.__getattribute__(attrname),

2623

2319

else:

2624

2320

parent_pipe.send((

2625

2321

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

2626

2322

2627

2323

if command == 'setattr':

2628

2324

attrname = request[1]

2629

2325

value = request[2]

2630

2326

setattr(client_object, attrname, value)

2631

2327

2632

2328

return True

2633

2329

2634

2330

2635

2331

def rfc3339_duration_to_delta(duration):

2636

2332

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

2637

2333

2638

2334

>>> rfc3339_duration_to_delta("P7D")

2639

2335

datetime.timedelta(7)

2640

2336

>>> rfc3339_duration_to_delta("PT60S")

2650

2346

>>> rfc3339_duration_to_delta("P1DT3M20S")

2651

2347

datetime.timedelta(1, 200)

2652

2348

"""

2653

2349

2654

2350

# Parsing an RFC 3339 duration with regular expressions is not

2655

2351

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

2656

2352

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

2657

2353

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

2658

2354

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

2659

2355

# avoid excessive use of external libraries.

2660

2356

2661

2357

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

2662

2358

Token = collections.namedtuple("Token", (

2663

2359

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

2696

2392

frozenset((token_year, token_month,

2697

2393

token_day, token_time,

2698

2394

token_week)))

2699

# Define starting values:

2700

# Value so far

2701

value = datetime.timedelta()

2395

# Define starting values

2396

value = datetime.timedelta() # Value so far

2702

2397

found_token = None

2703

# Following valid tokens

2704

followers = frozenset((token_duration, ))

2705

# String left to parse

2706

s = duration

2398

followers = frozenset((token_duration, )) # Following valid tokens

2399

s = duration # String left to parse

2707

2400

# Loop until end token is found

2708

2401

while found_token is not token_end:

2709

2402

# Search for any currently valid tokens

2733

2426

2734

2427

def string_to_delta(interval):

2735

2428

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

2736

2429

2737

2430

>>> string_to_delta('7d')

2738

2431

datetime.timedelta(7)

2739

2432

>>> string_to_delta('60s')

2747

2440

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

2748

2441

datetime.timedelta(0, 330)

2749

2442

"""

2750

2443

2751

2444

try:

2752

2445

return rfc3339_duration_to_delta(interval)

2753

2446

except ValueError:

2754

2447

pass

2755

2448

2756

2449

timevalue = datetime.timedelta(0)

2757

2450

for s in interval.split():

2758

2451

try:

2776

2469

return timevalue

2777

2470

2778

2471

2779

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

2472

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

2780

2473

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

2781

2474

2782

2475

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

2783

2476

if os.fork():

2784

2477

sys.exit()

2802

2495

2803

2496

2804

2497

def main():

2805

2498

2806

2499

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

2807

2500

# Parsing of options, both command line and config file

2808

2501

2809

2502

parser = argparse.ArgumentParser()

2810

2503

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

2811

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

2504

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

2812

2505

help="show version number and exit")

2813

2506

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

2814

2507

help="Bind to interface IF")

2850

2543

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

2851

2544

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

2852

2545

default=None)

2853

2546

2854

2547

options = parser.parse_args()

2855

2548

2856

2549

if options.check:

2857

2550

import doctest

2858

2551

fail_count, test_count = doctest.testmod()

2859

2552

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

2860

2553

2861

2554

# Default values for config file for server-global settings

2862

server_defaults = {"interface": "",

2863

"address": "",

2864

"port": "",

2865

"debug": "False",

2866

"priority":

2867

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

2868

":+SIGN-DSA-SHA256",

2869

"servicename": "Mandos",

2870

"use_dbus": "True",

2871

"use_ipv6": "True",

2872

"debuglevel": "",

2873

"restore": "True",

2874

"socket": "",

2875

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

2876

"foreground": "False",

2877

"zeroconf": "True",

2878

}

2879

2555

server_defaults = { "interface": "",

2556

"address": "",

2557

"port": "",

2558

"debug": "False",

2559

"priority":

2560

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

2561

":+SIGN-DSA-SHA256",

2562

"servicename": "Mandos",

2563

"use_dbus": "True",

2564

"use_ipv6": "True",

2565

"debuglevel": "",

2566

"restore": "True",

2567

"socket": "",

2568

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

2569

"foreground": "False",

2570

"zeroconf": "True",

2571

}

2572

2880

2573

# Parse config file for server-global settings

2881

2574

server_config = configparser.SafeConfigParser(server_defaults)

2882

2575

del server_defaults

2884

2577

# Convert the SafeConfigParser object to a dict

2885

2578

server_settings = server_config.defaults()

2886

2579

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

2887

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

2888

"foreground", "zeroconf"):

2580

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

2889

2581

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

2890

2582

option)

2891

2583

if server_settings["port"]:

2901

2593

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

2902

2594

["socket"])

2903

2595

del server_config

2904

2596

2905

2597

# Override the settings from the config file with command line

2906

2598

# options, if set.

2907

2599

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

2925

2617

if server_settings["debug"]:

2926

2618

server_settings["foreground"] = True

2927

2619

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

2928

2620

2929

2621

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

2930

2622

2931

2623

if (not server_settings["zeroconf"]

2932

2624

and not (server_settings["port"]

2933

2625

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

2934

2626

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

2935

2627

2936

2628

# For convenience

2937

2629

debug = server_settings["debug"]

2938

2630

debuglevel = server_settings["debuglevel"]

2942

2634

stored_state_file)

2943

2635

foreground = server_settings["foreground"]

2944

2636

zeroconf = server_settings["zeroconf"]

2945

2637

2946

2638

if debug:

2947

2639

initlogger(debug, logging.DEBUG)

2948

2640

else:

2951

2643

else:

2952

2644

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

2953

2645

initlogger(debug, level)

2954

2646

2955

2647

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

2956

2648

syslogger.setFormatter(

2957

2649

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

2958

2650

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

2959

2651

server_settings["servicename"])))

2960

2652

2961

2653

# Parse config file with clients

2962

2654

client_config = configparser.SafeConfigParser(Client

2963

2655

.client_defaults)

2964

2656

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

2965

2657

"clients.conf"))

2966

2658

2967

2659

global mandos_dbus_service

2968

2660

mandos_dbus_service = None

2969

2661

2970

2662

socketfd = None

2971

2663

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

2972

2664

socketfd = server_settings["socket"]

2988

2680

except IOError as e:

2989

2681

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

2990

2682

exc_info=e)

2991

2992

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

2993

("mandos", "mandos"),

2994

("nobody", "nogroup")):

2683

2684

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

2995

2685

try:

2996

2686

uid = pwd.getpwnam(name).pw_uid

2997

gid = pwd.getpwnam(group).pw_gid

2687

gid = pwd.getpwnam(name).pw_gid

2998

2688

break

2999

2689

except KeyError:

3000

2690

continue

3004

2694

try:

3005

2695

os.setgid(gid)

3006

2696

os.setuid(uid)

3007

if debug:

3008

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

3009

gid))

3010

2697

except OSError as error:

3011

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

3012

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

3013

2698

if error.errno != errno.EPERM:

3014

2699

raise

3015

2700

3016

2701

if debug:

3017

2702

# Enable all possible GnuTLS debugging

3018

2703

3019

2704

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

3020

2705

# - GnuTLS manual

3021

gnutls.global_set_log_level(11)

3022

3023

@gnutls.log_func

2706

gnutls.library.functions.gnutls_global_set_log_level(11)

2707

2708

@gnutls.library.types.gnutls_log_func

3024

2709

def debug_gnutls(level, string):

3025

2710

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

3026

3027

gnutls.global_set_log_function(debug_gnutls)

3028

2711

2712

gnutls.library.functions.gnutls_global_set_log_function(

2713

debug_gnutls)

2714

3029

2715

# Redirect stdin so all checkers get /dev/null

3030

2716

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

3031

2717

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

3032

2718

if null > 2:

3033

2719

os.close(null)

3034

2720

3035

2721

# Need to fork before connecting to D-Bus

3036

2722

if not foreground:

3037

2723

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

3038

2724

daemon()

3039

3040

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

3041

# to inform GLib that threads will be used.

3042

GLib.threads_init()

3043

2725

2726

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

2727

# need to inform gobject that threads will be used.

2728

gobject.threads_init()

2729

3044

2730

global main_loop

3045

2731

# From the Avahi example code

3046

2732

DBusGMainLoop(set_as_default=True)

3047

main_loop = GLib.MainLoop()

2733

main_loop = gobject.MainLoop()

3048

2734

bus = dbus.SystemBus()

3049

2735

# End of Avahi example code

3050

2736

if use_dbus:

3063

2749

if zeroconf:

3064

2750

protocol = avahi.PROTO_INET6 if use_ipv6 else avahi.PROTO_INET

3065

2751

service = AvahiServiceToSyslog(

3066

name=server_settings["servicename"],

3067

servicetype="_mandos._tcp",

3068

protocol=protocol,

3069

bus=bus)

2752

name = server_settings["servicename"],

2753

servicetype = "_mandos._tcp",

2754

protocol = protocol,

2755

bus = bus)

3070

2756

if server_settings["interface"]:

3071

2757

service.interface = if_nametoindex(

3072

2758

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

3073

2759

3074

2760

global multiprocessing_manager

3075

2761

multiprocessing_manager = multiprocessing.Manager()

3076

2762

3077

2763

client_class = Client

3078

2764

if use_dbus:

3079

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

3080

2765

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

2766

3081

2767

client_settings = Client.config_parser(client_config)

3082

2768

old_client_settings = {}

3083

2769

clients_data = {}

3084

2770

3085

2771

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

3086

2772

global wnull

3087

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

2773

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

3088

2774

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

3089

2775

# mode

3090

2776

if debug or not foreground:

3091

2777

wnull.close()

3092

2778

3093

2779

# Get client data and settings from last running state.

3094

2780

if server_settings["restore"]:

3095

2781

try:

3096

2782

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

3097

if sys.version_info.major == 2:

3098

clients_data, old_client_settings = pickle.load(

3099

stored_state)

3100

else:

3101

bytes_clients_data, bytes_old_client_settings = (

3102

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

3103

# Fix bytes to strings

3104

# clients_data

3105

# .keys()

3106

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

3107

if isinstance(key, bytes)

3108

else key): value

3109

for key, value in

3110

bytes_clients_data.items()}

3111

del bytes_clients_data

3112

for key in clients_data:

3113

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

3114

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

3115

for k, v in

3116

clients_data[key].items()}

3117

clients_data[key] = value

3118

# .client_structure

3119

value["client_structure"] = [

3120

(s.decode("utf-8")

3121

if isinstance(s, bytes)

3122

else s) for s in

3123

value["client_structure"]]

3124

# .name & .host

3125

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

3126

if isinstance(value[k], bytes):

3127

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

3128

# old_client_settings

3129

# .keys()

3130

old_client_settings = {

3131

(key.decode("utf-8")

3132

if isinstance(key, bytes)

3133

else key): value

3134

for key, value in

3135

bytes_old_client_settings.items()}

3136

del bytes_old_client_settings

3137

# .host

3138

for value in old_client_settings.values():

3139

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

3140

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

3141

.decode("utf-8"))

2783

clients_data, old_client_settings = pickle.load(

2784

stored_state)

3142

2785

os.remove(stored_state_path)

3143

2786

except IOError as e:

3144

2787

if e.errno == errno.ENOENT:

3152

2795

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

3153

2796

"EOFError:",

3154

2797

exc_info=e)

3155

2798

3156

2799

with PGPEngine() as pgp:

3157

2800

for client_name, client in clients_data.items():

3158

2801

# Skip removed clients

3159

2802

if client_name not in client_settings:

3160

2803

continue

3161

2804

3162

2805

# Decide which value to use after restoring saved state.

3163

2806

# We have three different values: Old config file,

3164

2807

# new config file, and saved state.

3175

2818

client[name] = value

3176

2819

except KeyError:

3177

2820

pass

3178

2821

3179

2822

# Clients who has passed its expire date can still be

3180

2823

# enabled if its last checker was successful. A Client

3181

2824

# whose checker succeeded before we stored its state is

3214

2857

client_name))

3215

2858

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

3216

2859

["secret"])

3217

2860

3218

2861

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

3219

2862

for client_name in (set(old_client_settings)

3220

2863

- set(client_settings)):

3222

2865

for client_name in (set(client_settings)

3223

2866

- set(old_client_settings)):

3224

2867

clients_data[client_name] = client_settings[client_name]

3225

2868

3226

2869

# Create all client objects

3227

2870

for client_name, client in clients_data.items():

3228

2871

tcp_server.clients[client_name] = client_class(

3229

name=client_name,

3230

settings=client,

3231

server_settings=server_settings)

3232

2872

name = client_name,

2873

settings = client,

2874

server_settings = server_settings)

2875

3233

2876

if not tcp_server.clients:

3234

2877

logger.warning("No clients defined")

3235

2878

3236

2879

if not foreground:

3237

2880

if pidfile is not None:

3238

2881

pid = os.getpid()

3244

2887

pidfilename, pid)

3245

2888

del pidfile

3246

2889

del pidfilename

3247

3248

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

3249

GLib.unix_signal_add(GLib.PRIORITY_HIGH, termsig,

3250

lambda: main_loop.quit() and False)

3251

2890

2891

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

2892

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

2893

3252

2894

if use_dbus:

3253

2895

3254

2896

@alternate_dbus_interfaces(

3255

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

2897

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

3256

2898

class MandosDBusService(DBusObjectWithObjectManager):

3257

2899

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

3258

2900

3259

2901

def __init__(self):

3260

2902

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

3261

2903

3262

2904

_interface = "se.recompile.Mandos"

3263

2905

3264

2906

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

3265

2907

def ClientAdded(self, objpath):

3266

2908

"D-Bus signal"

3267

2909

pass

3268

2910

3269

2911

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

3270

2912

def ClientNotFound(self, fingerprint, address):

3271

2913

"D-Bus signal"

3272

2914

pass

3273

2915

3274

2916

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

3275

2917

"true"})

3276

2918

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

3277

2919

def ClientRemoved(self, objpath, name):

3278

2920

"D-Bus signal"

3279

2921

pass

3280

2922

3281

2923

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

3282

2924

"true"})

3283

2925

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

3284

2926

def GetAllClients(self):

3285

2927

"D-Bus method"

3286

2928

return dbus.Array(c.dbus_object_path for c in

3287

tcp_server.clients.values())

3288

2929

tcp_server.clients.itervalues())

2930

3289

2931

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

3290

2932

"true"})

3291

2933

@dbus.service.method(_interface,

3293

2935

def GetAllClientsWithProperties(self):

3294

2936

"D-Bus method"

3295

2937

return dbus.Dictionary(

3296

{c.dbus_object_path: c.GetAll(

2938

{ c.dbus_object_path: c.GetAll(

3297

2939

"se.recompile.Mandos.Client")

3298

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

2940

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

3299

2941

signature="oa{sv}")

3300

2942

3301

2943

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

3302

2944

def RemoveClient(self, object_path):

3303

2945

"D-Bus method"

3304

for c in tcp_server.clients.values():

2946

for c in tcp_server.clients.itervalues():

3305

2947

if c.dbus_object_path == object_path:

3306

2948

del tcp_server.clients[c.name]

3307

2949

c.remove_from_connection()

3311

2953

self.client_removed_signal(c)

3312

2954

return

3313

2955

raise KeyError(object_path)

3314

2956

3315

2957

del _interface

3316

2958

3317

2959

@dbus.service.method(dbus.OBJECT_MANAGER_IFACE,

3318

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

2960

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

3319

2961

def GetManagedObjects(self):

3320

2962

"""D-Bus method"""

3321

2963

return dbus.Dictionary(

3322

{client.dbus_object_path:

3323

dbus.Dictionary(

3324

{interface: client.GetAll(interface)

3325

for interface in

3326

client._get_all_interface_names()})

3327

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

3328

2964

{ client.dbus_object_path:

2965

dbus.Dictionary(

2966

{ interface: client.GetAll(interface)

2967

for interface in

2968

client._get_all_interface_names()})

2969

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

2970

3329

2971

def client_added_signal(self, client):

3330

2972

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

3331

2973

if use_dbus:

3333

2975

self.InterfacesAdded(

3334

2976

client.dbus_object_path,

3335

2977

dbus.Dictionary(

3336

{interface: client.GetAll(interface)

3337

for interface in

3338

client._get_all_interface_names()}))

2978

{ interface: client.GetAll(interface)

2979

for interface in

2980

client._get_all_interface_names()}))

3339

2981

# Old signal

3340

2982

self.ClientAdded(client.dbus_object_path)

3341

2983

3342

2984

def client_removed_signal(self, client):

3343

2985

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

3344

2986

if use_dbus:

3349

2991

# Old signal

3350

2992

self.ClientRemoved(client.dbus_object_path,

3351

2993

client.name)

3352

2994

3353

2995

mandos_dbus_service = MandosDBusService()

3354

3355

# Save modules to variables to exempt the modules from being

3356

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

3357

mp = multiprocessing

3358

wn = wnull

3359

2996

3360

2997

def cleanup():

3361

2998

"Cleanup function; run on exit"

3362

2999

if zeroconf:

3363

3000

service.cleanup()

3364

3365

mp.active_children()

3366

wn.close()

3001

3002

multiprocessing.active_children()

3003

wnull.close()

3367

3004

if not (tcp_server.clients or client_settings):

3368

3005

return

3369

3006

3370

3007

# Store client before exiting. Secrets are encrypted with key

3371

3008

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

3372

3009

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

3373

3010

clients = {}

3374

3011

with PGPEngine() as pgp:

3375

for client in tcp_server.clients.values():

3012

for client in tcp_server.clients.itervalues():

3376

3013

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

3377

3014

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

3378

3015

key)

3379

3016

client_dict = {}

3380

3017

3381

3018

# A list of attributes that can not be pickled

3382

3019

# + secret.

3383

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

3384

"checker", "server_settings"}

3020

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

3021

"checker", "server_settings" }

3385

3022

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

3386

3023

.Object):

3387

3024

exclude.add(name)

3388

3025

3389

3026

client_dict["encrypted_secret"] = (client

3390

3027

.encrypted_secret)

3391

3028

for attr in client.client_structure:

3392

3029

if attr not in exclude:

3393

3030

client_dict[attr] = getattr(client, attr)

3394

3031

3395

3032

clients[client.name] = client_dict

3396

3033

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

3397

3034

3398

3035

try:

3399

3036

with tempfile.NamedTemporaryFile(

3400

3037

mode='wb',

3402

3039

prefix='clients-',

3403

3040

dir=os.path.dirname(stored_state_path),

3404

3041

delete=False) as stored_state:

3405

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

3406

protocol=2)

3042

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

3407

3043

tempname = stored_state.name

3408

3044

os.rename(tempname, stored_state_path)

3409

3045

except (IOError, OSError) as e:

3419

3055

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

3420

3056

exc_info=e)

3421

3057

raise

3422

3058

3423

3059

# Delete all clients, and settings from config

3424

3060

while tcp_server.clients:

3425

3061

name, client = tcp_server.clients.popitem()

3428

3064

# Don't signal the disabling

3429

3065

client.disable(quiet=True)

3430

3066

# Emit D-Bus signal for removal

3431

if use_dbus:

3432

mandos_dbus_service.client_removed_signal(client)

3067

mandos_dbus_service.client_removed_signal(client)

3433

3068

client_settings.clear()

3434

3069

3435

3070

atexit.register(cleanup)

3436

3437

for client in tcp_server.clients.values():

3071

3072

for client in tcp_server.clients.itervalues():

3438

3073

if use_dbus:

3439

3074

# Emit D-Bus signal for adding

3440

3075

mandos_dbus_service.client_added_signal(client)

3441

3076

# Need to initiate checking of clients

3442

3077

if client.enabled:

3443

3078

client.init_checker()

3444

3079

3445

3080

tcp_server.enable()

3446

3081

tcp_server.server_activate()

3447

3082

3448

3083

# Find out what port we got

3449

3084

if zeroconf:

3450

3085

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

3455

3090

else: # IPv4

3456

3091

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

3457

3092

*tcp_server.socket.getsockname())

3458

3459

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

3460

3093

3094

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

3095

3461

3096

try:

3462

3097

if zeroconf:

3463

3098

# From the Avahi example code

3468

3103

cleanup()

3469

3104

sys.exit(1)

3470

3105

# End of Avahi example code

3471

3472

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

3473

lambda *args, **kwargs:

3474

(tcp_server.handle_request

3475

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

3476

3106

3107

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

3108

lambda *args, **kwargs:

3109

(tcp_server.handle_request

3110

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

3111

3477

3112

logger.debug("Starting main loop")

3478

3113

main_loop.run()

3479

3114

except AvahiError as error: