/mandos/release : revision 237.7.333

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 = "1.7.19"

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,

1158

signature = "oas")

1494

1159

def InterfacesRemoved(self, object_path, interfaces):

1495

1160

pass

1496

1161

1497

1162

@dbus.service.method(dbus.INTROSPECTABLE_IFACE,

1498

out_signature="s",

1499

path_keyword='object_path',

1500

connection_keyword='connection')

1163

out_signature = "s",

1164

path_keyword = 'object_path',

1165

connection_keyword = 'connection')

1501

1166

def Introspect(self, object_path, connection):

1502

1167

"""Overloading of standard D-Bus method.

1503

1168

1504

1169

Override return argument name of GetManagedObjects to be

1505

1170

"objpath_interfaces_and_properties"

1506

1171

"""

1507

xmlstring = DBusObjectWithAnnotations.Introspect(self,

1508

object_path,

1509

connection)

1172

xmlstring = DBusObjectWithAnnotations(self, object_path,

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

1622

@functools.wraps(func2)

1293

1623

1294

def call_both(*args, **kwargs):

1624

1295

"""This function will emit two D-Bus

1625

1296

signals by calling func1 and func2"""

1626

1297

func1(*args, **kwargs)

1627

1298

func2(*args, **kwargs)

1628

# Make wrapper function look like a D-Bus

1629

# signal

1630

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

1631

if name.startswith("_dbus_"):

1632

setattr(call_both, name, attr)

1633

1299

1634

1300

return call_both

1635

1301

# Create the "call_both" function and add it to

1636

1302

# the class

1646

1312

alt_interface,

1647

1313

attribute._dbus_in_signature,

1648

1314

attribute._dbus_out_signature)

1649

(copy_function(attribute)))

1315

(types.FunctionType(attribute.func_code,

1316

attribute.func_globals,

1317

attribute.func_name,

1318

attribute.func_defaults,

1319

attribute.func_closure)))

1650

1320

# Copy annotations, if any

1651

1321

try:

1652

1322

attr[attrname]._dbus_annotations = dict(

1664

1334

attribute._dbus_access,

1665

1335

attribute._dbus_get_args_options

1666

1336

["byte_arrays"])

1667

(copy_function(attribute)))

1337

(types.FunctionType(

1338

attribute.func_code,

1339

attribute.func_globals,

1340

attribute.func_name,

1341

attribute.func_defaults,

1342

attribute.func_closure)))

1668

1343

# Copy annotations, if any

1669

1344

try:

1670

1345

attr[attrname]._dbus_annotations = dict(

1679

1354

# to the class.

1680

1355

attr[attrname] = (

1681

1356

dbus_interface_annotations(alt_interface)

1682

(copy_function(attribute)))

1357

(types.FunctionType(attribute.func_code,

1358

attribute.func_globals,

1359

attribute.func_name,

1360

attribute.func_defaults,

1361

attribute.func_closure)))

1683

1362

if deprecate:

1684

1363

# Deprecate all alternate interfaces

1685

iname = "_AlternateDBusNames_interface_annotation{}"

1364

iname="_AlternateDBusNames_interface_annotation{}"

1686

1365

for interface_name in interface_names:

1687

1366

1688

1367

@dbus_interface_annotations(interface_name)

1689

1368

def func(self):

1690

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

1691

"true"}

1369

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

1370

"true" }

1692

1371

# Find an unused name

1693

1372

for aname in (iname.format(i)

1694

1373

for i in itertools.count()):

1698

1377

if interface_names:

1699

1378

# Replace the class with a new subclass of it with

1700

1379

# 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)

1380

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

1381

(cls, ), attr)

1707

1382

return cls

1708

1383

1709

1384

return wrapper

1710

1385

1711

1386

1713

1388

"se.bsnet.fukt.Mandos"})

1714

1389

class ClientDBus(Client, DBusObjectWithProperties):

1715

1390

"""A Client class using D-Bus

1716

1391

1717

1392

Attributes:

1718

1393

dbus_object_path: dbus.ObjectPath

1719

1394

bus: dbus.SystemBus()

1720

1395

"""

1721

1396

1722

1397

runtime_expansions = (Client.runtime_expansions

1723

1398

+ ("dbus_object_path", ))

1724

1399

1725

1400

_interface = "se.recompile.Mandos.Client"

1726

1401

1727

1402

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

1728

1729

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

1403

1404

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

1730

1405

self.bus = bus

1731

1406

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

1732

1407

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

1738

1413

"/clients/" + client_object_name)

1739

1414

DBusObjectWithProperties.__init__(self, self.bus,

1740

1415

self.dbus_object_path)

1741

1416

1742

1417

def notifychangeproperty(transform_func, dbus_name,

1743

1418

type_func=lambda x: x,

1744

1419

variant_level=1,

1746

1421

_interface=_interface):

1747

1422

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

1748

1423

its changes to DBus.

1749

1424

1750

1425

transform_fun: Function that takes a value and a variant_level

1751

1426

and transforms it to a D-Bus type.

1752

1427

dbus_name: D-Bus name of the variable

1755

1430

variant_level: D-Bus variant level. Default: 1

1756

1431

"""

1757

1432

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

1758

1433

1759

1434

def setter(self, value):

1760

1435

if hasattr(self, "dbus_object_path"):

1761

1436

if (not hasattr(self, attrname) or

1768

1443

else:

1769

1444

dbus_value = transform_func(

1770

1445

type_func(value),

1771

variant_level=variant_level)

1446

variant_level = variant_level)

1772

1447

self.PropertyChanged(dbus.String(dbus_name),

1773

1448

dbus_value)

1774

1449

self.PropertiesChanged(

1775

1450

_interface,

1776

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

1777

dbus_value}),

1451

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

1452

dbus_value }),

1778

1453

dbus.Array())

1779

1454

setattr(self, attrname, value)

1780

1455

1781

1456

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

1782

1457

1783

1458

expires = notifychangeproperty(datetime_to_dbus, "Expires")

1784

1459

approvals_pending = notifychangeproperty(dbus.Boolean,

1785

1460

"ApprovalPending",

1786

type_func=bool)

1461

type_func = bool)

1787

1462

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

1788

1463

last_enabled = notifychangeproperty(datetime_to_dbus,

1789

1464

"LastEnabled")

1790

1465

checker = notifychangeproperty(

1791

1466

dbus.Boolean, "CheckerRunning",

1792

type_func=lambda checker: checker is not None)

1467

type_func = lambda checker: checker is not None)

1793

1468

last_checked_ok = notifychangeproperty(datetime_to_dbus,

1794

1469

"LastCheckedOK")

1795

1470

last_checker_status = notifychangeproperty(dbus.Int16,

1800

1475

"ApprovedByDefault")

1801

1476

approval_delay = notifychangeproperty(

1802

1477

dbus.UInt64, "ApprovalDelay",

1803

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

1478

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

1804

1479

approval_duration = notifychangeproperty(

1805

1480

dbus.UInt64, "ApprovalDuration",

1806

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

1481

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

1807

1482

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

1808

1483

timeout = notifychangeproperty(

1809

1484

dbus.UInt64, "Timeout",

1810

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

1485

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

1811

1486

extended_timeout = notifychangeproperty(

1812

1487

dbus.UInt64, "ExtendedTimeout",

1813

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

1488

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

1814

1489

interval = notifychangeproperty(

1815

1490

dbus.UInt64, "Interval",

1816

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

1491

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

1817

1492

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

1818

1493

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

1819

1494

invalidate_only=True)

1820

1495

1821

1496

del notifychangeproperty

1822

1497

1823

1498

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

1824

1499

try:

1825

1500

self.remove_from_connection()

1828

1503

if hasattr(DBusObjectWithProperties, "__del__"):

1829

1504

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

1830

1505

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

1831

1506

1832

1507

def checker_callback(self, source, condition,

1833

1508

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

1834

1509

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

1850

1525

| self.last_checker_signal),

1851

1526

dbus.String(command))

1852

1527

return ret

1853

1528

1854

1529

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

1855

1530

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

1856

1531

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

1860

1535

# Emit D-Bus signal

1861

1536

self.CheckerStarted(self.current_checker_command)

1862

1537

return r

1863

1538

1864

1539

def _reset_approved(self):

1865

1540

self.approved = None

1866

1541

return False

1867

1542

1868

1543

def approve(self, value=True):

1869

1544

self.approved = value

1870

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

1871

* 1000), self._reset_approved)

1545

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

1546

* 1000), self._reset_approved)

1872

1547

self.send_changedstate()

1873

1874

# D-Bus methods, signals & properties

1875

1876

# Interfaces

1877

1878

# Signals

1879

1548

1549

## D-Bus methods, signals & properties

1550

1551

## Interfaces

1552

1553

## Signals

1554

1880

1555

# CheckerCompleted - signal

1881

1556

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

1882

1557

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

1883

1558

"D-Bus signal"

1884

1559

pass

1885

1560

1886

1561

# CheckerStarted - signal

1887

1562

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

1888

1563

def CheckerStarted(self, command):

1889

1564

"D-Bus signal"

1890

1565

pass

1891

1566

1892

1567

# PropertyChanged - signal

1893

1568

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

1894

1569

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

1895

1570

def PropertyChanged(self, property, value):

1896

1571

"D-Bus signal"

1897

1572

pass

1898

1573

1899

1574

# GotSecret - signal

1900

1575

@dbus.service.signal(_interface)

1901

1576

def GotSecret(self):

1904

1579

server to mandos-client

1905

1580

"""

1906

1581

pass

1907

1582

1908

1583

# Rejected - signal

1909

1584

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

1910

1585

def Rejected(self, reason):

1911

1586

"D-Bus signal"

1912

1587

pass

1913

1588

1914

1589

# NeedApproval - signal

1915

1590

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

1916

1591

def NeedApproval(self, timeout, default):

1917

1592

"D-Bus signal"

1918

1593

return self.need_approval()

1919

1920

# Methods

1921

1594

1595

## Methods

1596

1922

1597

# Approve - method

1923

1598

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

1924

1599

def Approve(self, value):

1925

1600

self.approve(value)

1926

1601

1927

1602

# CheckedOK - method

1928

1603

@dbus.service.method(_interface)

1929

1604

def CheckedOK(self):

1930

1605

self.checked_ok()

1931

1606

1932

1607

# Enable - method

1933

1608

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

1934

1609

@dbus.service.method(_interface)

1935

1610

def Enable(self):

1936

1611

"D-Bus method"

1937

1612

self.enable()

1938

1613

1939

1614

# StartChecker - method

1940

1615

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

1941

1616

@dbus.service.method(_interface)

1942

1617

def StartChecker(self):

1943

1618

"D-Bus method"

1944

1619

self.start_checker()

1945

1620

1946

1621

# Disable - method

1947

1622

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

1948

1623

@dbus.service.method(_interface)

1949

1624

def Disable(self):

1950

1625

"D-Bus method"

1951

1626

self.disable()

1952

1627

1953

1628

# StopChecker - method

1954

1629

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

1955

1630

@dbus.service.method(_interface)

1956

1631

def StopChecker(self):

1957

1632

self.stop_checker()

1958

1959

# Properties

1960

1633

1634

## Properties

1635

1961

1636

# ApprovalPending - property

1962

1637

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

1963

1638

def ApprovalPending_dbus_property(self):

1964

1639

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

1965

1640

1966

1641

# ApprovedByDefault - property

1967

1642

@dbus_service_property(_interface,

1968

1643

signature="b",

1971

1646

if value is None: # get

1972

1647

return dbus.Boolean(self.approved_by_default)

1973

1648

self.approved_by_default = bool(value)

1974

1649

1975

1650

# ApprovalDelay - property

1976

1651

@dbus_service_property(_interface,

1977

1652

signature="t",

1981

1656

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

1982

1657

* 1000)

1983

1658

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

1984

1659

1985

1660

# ApprovalDuration - property

1986

1661

@dbus_service_property(_interface,

1987

1662

signature="t",

1991

1666

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

1992

1667

* 1000)

1993

1668

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

1994

1669

1995

1670

# Name - property

1996

1671

@dbus_annotations(

1997

1672

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

1998

1673

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

1999

1674

def Name_dbus_property(self):

2000

1675

return dbus.String(self.name)

2001

1676

2002

1677

# Fingerprint - property

2003

1678

@dbus_annotations(

2004

1679

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

2005

1680

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

2006

1681

def Fingerprint_dbus_property(self):

2007

1682

return dbus.String(self.fingerprint)

2008

1683

2009

1684

# Host - property

2010

1685

@dbus_service_property(_interface,

2011

1686

signature="s",

2014

1689

if value is None: # get

2015

1690

return dbus.String(self.host)

2016

1691

self.host = str(value)

2017

1692

2018

1693

# Created - property

2019

1694

@dbus_annotations(

2020

1695

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

2021

1696

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

2022

1697

def Created_dbus_property(self):

2023

1698

return datetime_to_dbus(self.created)

2024

1699

2025

1700

# LastEnabled - property

2026

1701

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

2027

1702

def LastEnabled_dbus_property(self):

2028

1703

return datetime_to_dbus(self.last_enabled)

2029

1704

2030

1705

# Enabled - property

2031

1706

@dbus_service_property(_interface,

2032

1707

signature="b",

2038

1713

self.enable()

2039

1714

else:

2040

1715

self.disable()

2041

1716

2042

1717

# LastCheckedOK - property

2043

1718

@dbus_service_property(_interface,

2044

1719

signature="s",

2048

1723

self.checked_ok()

2049

1724

return

2050

1725

return datetime_to_dbus(self.last_checked_ok)

2051

1726

2052

1727

# LastCheckerStatus - property

2053

1728

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

2054

1729

def LastCheckerStatus_dbus_property(self):

2055

1730

return dbus.Int16(self.last_checker_status)

2056

1731

2057

1732

# Expires - property

2058

1733

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

2059

1734

def Expires_dbus_property(self):

2060

1735

return datetime_to_dbus(self.expires)

2061

1736

2062

1737

# LastApprovalRequest - property

2063

1738

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

2064

1739

def LastApprovalRequest_dbus_property(self):

2065

1740

return datetime_to_dbus(self.last_approval_request)

2066

1741

2067

1742

# Timeout - property

2068

1743

@dbus_service_property(_interface,

2069

1744

signature="t",

2084

1759

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

2085

1760

is None):

2086

1761

return

2087

GLib.source_remove(self.disable_initiator_tag)

2088

self.disable_initiator_tag = GLib.timeout_add(

1762

gobject.source_remove(self.disable_initiator_tag)

1763

self.disable_initiator_tag = gobject.timeout_add(

2089

1764

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

2090

1765

self.disable)

2091

1766

2092

1767

# ExtendedTimeout - property

2093

1768

@dbus_service_property(_interface,

2094

1769

signature="t",

2098

1773

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

2099

1774

* 1000)

2100

1775

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

2101

1776

2102

1777

# Interval - property

2103

1778

@dbus_service_property(_interface,

2104

1779

signature="t",

2111

1786

return

2112

1787

if self.enabled:

2113

1788

# Reschedule checker run

2114

GLib.source_remove(self.checker_initiator_tag)

2115

self.checker_initiator_tag = GLib.timeout_add(

1789

gobject.source_remove(self.checker_initiator_tag)

1790

self.checker_initiator_tag = gobject.timeout_add(

2116

1791

value, self.start_checker)

2117

self.start_checker() # Start one now, too

2118

1792

self.start_checker() # Start one now, too

1793

2119

1794

# Checker - property

2120

1795

@dbus_service_property(_interface,

2121

1796

signature="s",

2124

1799

if value is None: # get

2125

1800

return dbus.String(self.checker_command)

2126

1801

self.checker_command = str(value)

2127

1802

2128

1803

# CheckerRunning - property

2129

1804

@dbus_service_property(_interface,

2130

1805

signature="b",

2136

1811

self.start_checker()

2137

1812

else:

2138

1813

self.stop_checker()

2139

1814

2140

1815

# ObjectPath - property

2141

1816

@dbus_annotations(

2142

1817

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

2143

1818

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

2144

1819

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

2145

1820

def ObjectPath_dbus_property(self):

2146

return self.dbus_object_path # is already a dbus.ObjectPath

2147

1821

return self.dbus_object_path # is already a dbus.ObjectPath

1822

2148

1823

# Secret = property

2149

1824

@dbus_annotations(

2150

1825

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

2155

1830

byte_arrays=True)

2156

1831

def Secret_dbus_property(self, value):

2157

1832

self.secret = bytes(value)

2158

1833

2159

1834

del _interface

2160

1835

2161

1836

2165

1840

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

2166

1841

if not self._pipe.recv():

2167

1842

raise KeyError(fpr)

2168

1843

2169

1844

def __getattribute__(self, name):

2170

1845

if name == '_pipe':

2171

1846

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

2174

1849

if data[0] == 'data':

2175

1850

return data[1]

2176

1851

if data[0] == 'function':

2177

1852

2178

1853

def func(*args, **kwargs):

2179

1854

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

2180

1855

return self._pipe.recv()[1]

2181

1856

2182

1857

return func

2183

1858

2184

1859

def __setattr__(self, name, value):

2185

1860

if name == '_pipe':

2186

1861

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

2189

1864

2190

1865

class ClientHandler(socketserver.BaseRequestHandler, object):

2191

1866

"""A class to handle client connections.

2192

1867

2193

1868

Instantiated once for each connection to handle it.

2194

1869

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

2195

1870

2196

1871

def handle(self):

2197

1872

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

2198

1873

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

2199

1874

str(self.client_address))

2200

1875

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

2201

1876

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"))

1877

1878

session = gnutls.connection.ClientSession(

1879

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

1880

1881

# Note: gnutls.connection.X509Credentials is really a

1882

# generic GnuTLS certificate credentials object so long as

1883

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

1884

# here despite using OpenPGP certificates.

1885

1886

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

1887

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

1888

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

1889

# "+DHE-DSS"))

2209

1890

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

2210

1891

priority = self.server.gnutls_priority

2211

1892

if priority is None:

2212

1893

priority = "NORMAL"

2213

gnutls.priority_set_direct(session._c_object,

2214

priority.encode("utf-8"),

2215

None)

2216

1894

gnutls.library.functions.gnutls_priority_set_direct(

1895

session._c_object, priority, None)

1896

2217

1897

# Start communication using the Mandos protocol

2218

1898

# Get protocol number

2219

1899

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

2224

1904

except (ValueError, IndexError, RuntimeError) as error:

2225

1905

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

2226

1906

return

2227

1907

2228

1908

# Start GnuTLS connection

2229

1909

try:

2230

1910

session.handshake()

2231

except gnutls.Error as error:

1911

except gnutls.errors.GNUTLSError as error:

2232

1912

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

2233

1913

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

2234

1914

# established. Just abandon the request.

2235

1915

return

2236

1916

logger.debug("Handshake succeeded")

2237

1917

2238

1918

approval_required = False

2239

1919

try:

2240

1920

try:

2241

1921

fpr = self.fingerprint(

2242

1922

self.peer_certificate(session))

2243

except (TypeError, gnutls.Error) as error:

1923

except (TypeError,

1924

gnutls.errors.GNUTLSError) as error:

2244

1925

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

2245

1926

return

2246

1927

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

2247

1928

2248

1929

try:

2249

1930

client = ProxyClient(child_pipe, fpr,

2250

1931

self.client_address)

2251

1932

except KeyError:

2252

1933

return

2253

1934

2254

1935

if client.approval_delay:

2255

1936

delay = client.approval_delay

2256

1937

client.approvals_pending += 1

2257

1938

approval_required = True

2258

1939

2259

1940

while True:

2260

1941

if not client.enabled:

2261

1942

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

2264

1945

# Emit D-Bus signal

2265

1946

client.Rejected("Disabled")

2266

1947

return

2267

1948

2268

1949

if client.approved or not client.approval_delay:

2269

# We are approved or approval is disabled

1950

#We are approved or approval is disabled

2270

1951

break

2271

1952

elif client.approved is None:

2272

1953

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

2283

1964

# Emit D-Bus signal

2284

1965

client.Rejected("Denied")

2285

1966

return

2286

2287

# wait until timeout or approved

1967

1968

#wait until timeout or approved

2288

1969

time = datetime.datetime.now()

2289

1970

client.changedstate.acquire()

2290

1971

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

2303

1984

break

2304

1985

else:

2305

1986

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

1987

1988

sent_size = 0

1989

while sent_size < len(client.secret):

1990

try:

1991

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

1992

except gnutls.errors.GNUTLSError as error:

1993

logger.warning("gnutls send failed",

1994

exc_info=error)

1995

return

1996

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

1997

len(client.secret) - (sent_size

1998

+ sent))

1999

sent_size += sent

2000

2314

2001

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

2315

2002

# bump the timeout using extended_timeout

2316

2003

client.bump_timeout(client.extended_timeout)

2317

2004

if self.server.use_dbus:

2318

2005

# Emit D-Bus signal

2319

2006

client.GotSecret()

2320

2007

2321

2008

finally:

2322

2009

if approval_required:

2323

2010

client.approvals_pending -= 1

2324

2011

try:

2325

2012

session.bye()

2326

except gnutls.Error as error:

2013

except gnutls.errors.GNUTLSError as error:

2327

2014

logger.warning("GnuTLS bye failed",

2328

2015

exc_info=error)

2329

2016

2330

2017

@staticmethod

2331

2018

def peer_certificate(session):

2332

2019

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

2333

2020

# 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""

2021

if (gnutls.library.functions.gnutls_certificate_type_get(

2022

session._c_object)

2023

!= gnutls.library.constants.GNUTLS_CRT_OPENPGP):

2024

# ...do the normal thing

2025

return session.peer_certificate

2338

2026

list_size = ctypes.c_uint(1)

2339

cert_list = (gnutls.certificate_get_peers

2027

cert_list = (gnutls.library.functions

2028

.gnutls_certificate_get_peers

2340

2029

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

2341

2030

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

2342

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

2031

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

2032

" certificate")

2343

2033

if list_size.value == 0:

2344

2034

return None

2345

2035

cert = cert_list[0]

2346

2036

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

2347

2037

2348

2038

@staticmethod

2349

2039

def fingerprint(openpgp):

2350

2040

"Convert an OpenPGP bytestring to a hexdigit fingerprint"

2351

2041

# New GnuTLS "datum" with the OpenPGP public key

2352

datum = gnutls.datum_t(

2042

datum = gnutls.library.types.gnutls_datum_t(

2353

2043

ctypes.cast(ctypes.c_char_p(openpgp),

2354

2044

ctypes.POINTER(ctypes.c_ubyte)),

2355

2045

ctypes.c_uint(len(openpgp)))

2356

2046

# New empty GnuTLS certificate

2357

crt = gnutls.openpgp_crt_t()

2358

gnutls.openpgp_crt_init(ctypes.byref(crt))

2047

crt = gnutls.library.types.gnutls_openpgp_crt_t()

2048

gnutls.library.functions.gnutls_openpgp_crt_init(

2049

ctypes.byref(crt))

2359

2050

# Import the OpenPGP public key into the certificate

2360

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

2361

gnutls.OPENPGP_FMT_RAW)

2051

gnutls.library.functions.gnutls_openpgp_crt_import(

2052

crt, ctypes.byref(datum),

2053

gnutls.library.constants.GNUTLS_OPENPGP_FMT_RAW)

2362

2054

# Verify the self signature in the key

2363

2055

crtverify = ctypes.c_uint()

2364

gnutls.openpgp_crt_verify_self(crt, 0,

2365

ctypes.byref(crtverify))

2056

gnutls.library.functions.gnutls_openpgp_crt_verify_self(

2057

crt, 0, ctypes.byref(crtverify))

2366

2058

if crtverify.value != 0:

2367

gnutls.openpgp_crt_deinit(crt)

2368

raise gnutls.CertificateSecurityError(code

2369

=crtverify.value)

2059

gnutls.library.functions.gnutls_openpgp_crt_deinit(crt)

2060

raise gnutls.errors.CertificateSecurityError(

2061

"Verify failed")

2370

2062

# New buffer for the fingerprint

2371

2063

buf = ctypes.create_string_buffer(20)

2372

2064

buf_len = ctypes.c_size_t()

2373

2065

# Get the fingerprint from the certificate into the buffer

2374

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

2375

ctypes.byref(buf_len))

2066

gnutls.library.functions.gnutls_openpgp_crt_get_fingerprint(

2067

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

2376

2068

# Deinit the certificate

2377

gnutls.openpgp_crt_deinit(crt)

2069

gnutls.library.functions.gnutls_openpgp_crt_deinit(crt)

2378

2070

# Convert the buffer to a Python bytestring

2379

2071

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

2380

2072

# Convert the bytestring to hexadecimal notation

2384

2076

2385

2077

class MultiprocessingMixIn(object):

2386

2078

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

2387

2079

2388

2080

def sub_process_main(self, request, address):

2389

2081

try:

2390

2082

self.finish_request(request, address)

2391

2083

except Exception:

2392

2084

self.handle_error(request, address)

2393

2085

self.close_request(request)

2394

2086

2395

2087

def process_request(self, request, address):

2396

2088

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

2397

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

2398

args=(request, address))

2089

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

2090

args = (request, address))

2399

2091

proc.start()

2400

2092

return proc

2401

2093

2402

2094

2403

2095

class MultiprocessingMixInWithPipe(MultiprocessingMixIn, object):

2404

2096

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

2405

2097

2406

2098

def process_request(self, request, client_address):

2407

2099

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

2408

2100

2409

2101

This function creates a new pipe in self.pipe

2410

2102

"""

2411

2103

parent_pipe, self.child_pipe = multiprocessing.Pipe()

2412

2104

2413

2105

proc = MultiprocessingMixIn.process_request(self, request,

2414

2106

client_address)

2415

2107

self.child_pipe.close()

2416

2108

self.add_pipe(parent_pipe, proc)

2417

2109

2418

2110

def add_pipe(self, parent_pipe, proc):

2419

2111

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

2420

2112

raise NotImplementedError()

2423

2115

class IPv6_TCPServer(MultiprocessingMixInWithPipe,

2424

2116

socketserver.TCPServer, object):

2425

2117

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

2426

2118

2427

2119

Attributes:

2428

2120

enabled: Boolean; whether this server is activated yet

2429

2121

interface: None or a network interface name (string)

2430

2122

use_ipv6: Boolean; to use IPv6 or not

2431

2123

"""

2432

2124

2433

2125

def __init__(self, server_address, RequestHandlerClass,

2434

2126

interface=None,

2435

2127

use_ipv6=True,

2445

2137

self.socketfd = socketfd

2446

2138

# Save the original socket.socket() function

2447

2139

self.socket_socket = socket.socket

2448

2449

2140

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

2450

#

2141

#

2451

2142

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

2452

2143

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

2453

2144

# patching socket.socket.)

2454

#

2145

#

2455

2146

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

2456

2147

@functools.wraps(socket.socket)

2457

2148

def socket_wrapper(*args, **kwargs):

2469

2160

# socket_wrapper(), if socketfd was set.

2470

2161

socketserver.TCPServer.__init__(self, server_address,

2471

2162

RequestHandlerClass)

2472

2163

2473

2164

def server_bind(self):

2474

2165

"""This overrides the normal server_bind() function

2475

2166

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

2476

2167

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

2477

global SO_BINDTODEVICE

2478

2168

if self.interface is not None:

2479

2169

if SO_BINDTODEVICE is None:

2480

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

2481

# common enough.

2482

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

2483

SO_BINDTODEVICE = 25

2484

try:

2485

self.socket.setsockopt(

2486

socket.SOL_SOCKET, SO_BINDTODEVICE,

2487

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

2488

except socket.error as error:

2489

if error.errno == errno.EPERM:

2490

logger.error("No permission to bind to"

2491

" interface %s", self.interface)

2492

elif error.errno == errno.ENOPROTOOPT:

2493

logger.error("SO_BINDTODEVICE not available;"

2494

" cannot bind to interface %s",

2495

self.interface)

2496

elif error.errno == errno.ENODEV:

2497

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

2498

" cannot bind", self.interface)

2499

else:

2500

raise

2170

logger.error("SO_BINDTODEVICE does not exist;"

2171

" cannot bind to interface %s",

2172

self.interface)

2173

else:

2174

try:

2175

self.socket.setsockopt(

2176

socket.SOL_SOCKET, SO_BINDTODEVICE,

2177

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

2178

except socket.error as error:

2179

if error.errno == errno.EPERM:

2180

logger.error("No permission to bind to"

2181

" interface %s", self.interface)

2182

elif error.errno == errno.ENOPROTOOPT:

2183

logger.error("SO_BINDTODEVICE not available;"

2184

" cannot bind to interface %s",

2185

self.interface)

2186

elif error.errno == errno.ENODEV:

2187

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

2188

" cannot bind", self.interface)

2189

else:

2190

raise

2501

2191

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

2502

2192

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

2503

2193

if not self.server_address[0]:

2504

2194

if self.address_family == socket.AF_INET6:

2505

any_address = "::" # in6addr_any

2195

any_address = "::" # in6addr_any

2506

2196

else:

2507

any_address = "0.0.0.0" # INADDR_ANY

2197

any_address = "0.0.0.0" # INADDR_ANY

2508

2198

self.server_address = (any_address,

2509

2199

self.server_address[1])

2510

2200

elif not self.server_address[1]:

2520

2210

2521

2211

class MandosServer(IPv6_TCPServer):

2522

2212

"""Mandos server.

2523

2213

2524

2214

Attributes:

2525

2215

clients: set of Client objects

2526

2216

gnutls_priority GnuTLS priority string

2527

2217

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

2528

2529

Assumes a GLib.MainLoop event loop.

2218

2219

Assumes a gobject.MainLoop event loop.

2530

2220

"""

2531

2221

2532

2222

def __init__(self, server_address, RequestHandlerClass,

2533

2223

interface=None,

2534

2224

use_ipv6=True,

2544

2234

self.gnutls_priority = gnutls_priority

2545

2235

IPv6_TCPServer.__init__(self, server_address,

2546

2236

RequestHandlerClass,

2547

interface=interface,

2548

use_ipv6=use_ipv6,

2549

socketfd=socketfd)

2550

2237

interface = interface,

2238

use_ipv6 = use_ipv6,

2239

socketfd = socketfd)

2240

2551

2241

def server_activate(self):

2552

2242

if self.enabled:

2553

2243

return socketserver.TCPServer.server_activate(self)

2554

2244

2555

2245

def enable(self):

2556

2246

self.enabled = True

2557

2247

2558

2248

def add_pipe(self, parent_pipe, proc):

2559

2249

# Call "handle_ipc" for both data and EOF events

2560

GLib.io_add_watch(

2250

gobject.io_add_watch(

2561

2251

parent_pipe.fileno(),

2562

GLib.IO_IN | GLib.IO_HUP,

2252

gobject.IO_IN | gobject.IO_HUP,

2563

2253

functools.partial(self.handle_ipc,

2564

parent_pipe=parent_pipe,

2565

proc=proc))

2566

2254

parent_pipe = parent_pipe,

2255

proc = proc))

2256

2567

2257

def handle_ipc(self, source, condition,

2568

2258

parent_pipe=None,

2569

proc=None,

2259

proc = None,

2570

2260

client_object=None):

2571

2261

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

2572

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

2262

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

2573

2263

# Wait for other process to exit

2574

2264

proc.join()

2575

2265

return False

2576

2266

2577

2267

# Read a request from the child

2578

2268

request = parent_pipe.recv()

2579

2269

command = request[0]

2580

2270

2581

2271

if command == 'init':

2582

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

2272

fpr = request[1]

2583

2273

address = request[2]

2584

2585

for c in self.clients.values():

2274

2275

for c in self.clients.itervalues():

2586

2276

if c.fingerprint == fpr:

2587

2277

client = c

2588

2278

break

2595

2285

address[0])

2596

2286

parent_pipe.send(False)

2597

2287

return False

2598

2599

GLib.io_add_watch(

2288

2289

gobject.io_add_watch(

2600

2290

parent_pipe.fileno(),

2601

GLib.IO_IN | GLib.IO_HUP,

2291

gobject.IO_IN | gobject.IO_HUP,

2602

2292

functools.partial(self.handle_ipc,

2603

parent_pipe=parent_pipe,

2604

proc=proc,

2605

client_object=client))

2293

parent_pipe = parent_pipe,

2294

proc = proc,

2295

client_object = client))

2606

2296

parent_pipe.send(True)

2607

2297

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

2608

2298

# same fileno

2611

2301

funcname = request[1]

2612

2302

args = request[2]

2613

2303

kwargs = request[3]

2614

2304

2615

2305

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

2616

2306

funcname)(*args,

2617

2307

**kwargs)))

2618

2308

2619

2309

if command == 'getattr':

2620

2310

attrname = request[1]

2621

2311

if isinstance(client_object.__getattribute__(attrname),

2624

2314

else:

2625

2315

parent_pipe.send((

2626

2316

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

2627

2317

2628

2318

if command == 'setattr':

2629

2319

attrname = request[1]

2630

2320

value = request[2]

2631

2321

setattr(client_object, attrname, value)

2632

2322

2633

2323

return True

2634

2324

2635

2325

2636

2326

def rfc3339_duration_to_delta(duration):

2637

2327

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

2638

2328

2639

2329

>>> rfc3339_duration_to_delta("P7D")

2640

2330

datetime.timedelta(7)

2641

2331

>>> rfc3339_duration_to_delta("PT60S")

2651

2341

>>> rfc3339_duration_to_delta("P1DT3M20S")

2652

2342

datetime.timedelta(1, 200)

2653

2343

"""

2654

2344

2655

2345

# Parsing an RFC 3339 duration with regular expressions is not

2656

2346

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

2657

2347

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

2658

2348

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

2659

2349

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

2660

2350

# avoid excessive use of external libraries.

2661

2351

2662

2352

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

2663

2353

Token = collections.namedtuple("Token", (

2664

2354

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

2697

2387

frozenset((token_year, token_month,

2698

2388

token_day, token_time,

2699

2389

token_week)))

2700

# Define starting values:

2701

# Value so far

2702

value = datetime.timedelta()

2390

# Define starting values

2391

value = datetime.timedelta() # Value so far

2703

2392

found_token = None

2704

# Following valid tokens

2705

followers = frozenset((token_duration, ))

2706

# String left to parse

2707

s = duration

2393

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

2394

s = duration # String left to parse

2708

2395

# Loop until end token is found

2709

2396

while found_token is not token_end:

2710

2397

# Search for any currently valid tokens

2734

2421

2735

2422

def string_to_delta(interval):

2736

2423

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

2737

2424

2738

2425

>>> string_to_delta('7d')

2739

2426

datetime.timedelta(7)

2740

2427

>>> string_to_delta('60s')

2748

2435

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

2749

2436

datetime.timedelta(0, 330)

2750

2437

"""

2751

2438

2752

2439

try:

2753

2440

return rfc3339_duration_to_delta(interval)

2754

2441

except ValueError:

2755

2442

pass

2756

2443

2757

2444

timevalue = datetime.timedelta(0)

2758

2445

for s in interval.split():

2759

2446

try:

2777

2464

return timevalue

2778

2465

2779

2466

2780

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

2467

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

2781

2468

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

2782

2469

2783

2470

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

2784

2471

if os.fork():

2785

2472

sys.exit()

2803

2490

2804

2491

2805

2492

def main():

2806

2493

2807

2494

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

2808

2495

# Parsing of options, both command line and config file

2809

2496

2810

2497

parser = argparse.ArgumentParser()

2811

2498

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

2812

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

2499

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

2813

2500

help="show version number and exit")

2814

2501

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

2815

2502

help="Bind to interface IF")

2851

2538

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

2852

2539

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

2853

2540

default=None)

2854

2541

2855

2542

options = parser.parse_args()

2856

2543

2857

2544

if options.check:

2858

2545

import doctest

2859

2546

fail_count, test_count = doctest.testmod()

2860

2547

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

2861

2548

2862

2549

# Default values for config file for server-global settings

2863

server_defaults = {"interface": "",

2864

"address": "",

2865

"port": "",

2866

"debug": "False",

2867

"priority":

2868

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

2869

":+SIGN-DSA-SHA256",

2870

"servicename": "Mandos",

2871

"use_dbus": "True",

2872

"use_ipv6": "True",

2873

"debuglevel": "",

2874

"restore": "True",

2875

"socket": "",

2876

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

2877

"foreground": "False",

2878

"zeroconf": "True",

2879

}

2880

2550

server_defaults = { "interface": "",

2551

"address": "",

2552

"port": "",

2553

"debug": "False",

2554

"priority":

2555

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

2556

":+SIGN-DSA-SHA256",

2557

"servicename": "Mandos",

2558

"use_dbus": "True",

2559

"use_ipv6": "True",

2560

"debuglevel": "",

2561

"restore": "True",

2562

"socket": "",

2563

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

2564

"foreground": "False",

2565

"zeroconf": "True",

2566

}

2567

2881

2568

# Parse config file for server-global settings

2882

2569

server_config = configparser.SafeConfigParser(server_defaults)

2883

2570

del server_defaults

2885

2572

# Convert the SafeConfigParser object to a dict

2886

2573

server_settings = server_config.defaults()

2887

2574

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

2888

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

2889

"foreground", "zeroconf"):

2575

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

2890

2576

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

2891

2577

option)

2892

2578

if server_settings["port"]:

2902

2588

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

2903

2589

["socket"])

2904

2590

del server_config

2905

2591

2906

2592

# Override the settings from the config file with command line

2907

2593

# options, if set.

2908

2594

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

2926

2612

if server_settings["debug"]:

2927

2613

server_settings["foreground"] = True

2928

2614

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

2929

2615

2930

2616

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

2931

2617

2932

2618

if (not server_settings["zeroconf"]

2933

2619

and not (server_settings["port"]

2934

2620

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

2935

2621

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

2936

2622

2937

2623

# For convenience

2938

2624

debug = server_settings["debug"]

2939

2625

debuglevel = server_settings["debuglevel"]

2943

2629

stored_state_file)

2944

2630

foreground = server_settings["foreground"]

2945

2631

zeroconf = server_settings["zeroconf"]

2946

2632

2947

2633

if debug:

2948

2634

initlogger(debug, logging.DEBUG)

2949

2635

else:

2952

2638

else:

2953

2639

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

2954

2640

initlogger(debug, level)

2955

2641

2956

2642

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

2957

2643

syslogger.setFormatter(

2958

2644

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

2959

2645

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

2960

2646

server_settings["servicename"])))

2961

2647

2962

2648

# Parse config file with clients

2963

2649

client_config = configparser.SafeConfigParser(Client

2964

2650

.client_defaults)

2965

2651

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

2966

2652

"clients.conf"))

2967

2653

2968

2654

global mandos_dbus_service

2969

2655

mandos_dbus_service = None

2970

2656

2971

2657

socketfd = None

2972

2658

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

2973

2659

socketfd = server_settings["socket"]

2989

2675

except IOError as e:

2990

2676

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

2991

2677

exc_info=e)

2992

2993

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

2994

("mandos", "mandos"),

2995

("nobody", "nogroup")):

2678

2679

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

2996

2680

try:

2997

2681

uid = pwd.getpwnam(name).pw_uid

2998

gid = pwd.getpwnam(group).pw_gid

2682

gid = pwd.getpwnam(name).pw_gid

2999

2683

break

3000

2684

except KeyError:

3001

2685

continue

3005

2689

try:

3006

2690

os.setgid(gid)

3007

2691

os.setuid(uid)

3008

if debug:

3009

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

3010

gid))

3011

2692

except OSError as error:

3012

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

3013

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

3014

2693

if error.errno != errno.EPERM:

3015

2694

raise

3016

2695

3017

2696

if debug:

3018

2697

# Enable all possible GnuTLS debugging

3019

2698

3020

2699

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

3021

2700

# - GnuTLS manual

3022

gnutls.global_set_log_level(11)

3023

3024

@gnutls.log_func

2701

gnutls.library.functions.gnutls_global_set_log_level(11)

2702

2703

@gnutls.library.types.gnutls_log_func

3025

2704

def debug_gnutls(level, string):

3026

2705

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

3027

3028

gnutls.global_set_log_function(debug_gnutls)

3029

2706

2707

gnutls.library.functions.gnutls_global_set_log_function(

2708

debug_gnutls)

2709

3030

2710

# Redirect stdin so all checkers get /dev/null

3031

2711

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

3032

2712

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

3033

2713

if null > 2:

3034

2714

os.close(null)

3035

2715

3036

2716

# Need to fork before connecting to D-Bus

3037

2717

if not foreground:

3038

2718

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

3039

2719

daemon()

3040

3041

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

3042

# to inform GLib that threads will be used.

3043

GLib.threads_init()

3044

2720

2721

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

2722

# need to inform gobject that threads will be used.

2723

gobject.threads_init()

2724

3045

2725

global main_loop

3046

2726

# From the Avahi example code

3047

2727

DBusGMainLoop(set_as_default=True)

3048

main_loop = GLib.MainLoop()

2728

main_loop = gobject.MainLoop()

3049

2729

bus = dbus.SystemBus()

3050

2730

# End of Avahi example code

3051

2731

if use_dbus:

3064

2744

if zeroconf:

3065

2745

protocol = avahi.PROTO_INET6 if use_ipv6 else avahi.PROTO_INET

3066

2746

service = AvahiServiceToSyslog(

3067

name=server_settings["servicename"],

3068

servicetype="_mandos._tcp",

3069

protocol=protocol,

3070

bus=bus)

2747

name = server_settings["servicename"],

2748

servicetype = "_mandos._tcp",

2749

protocol = protocol,

2750

bus = bus)

3071

2751

if server_settings["interface"]:

3072

2752

service.interface = if_nametoindex(

3073

2753

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

3074

2754

3075

2755

global multiprocessing_manager

3076

2756

multiprocessing_manager = multiprocessing.Manager()

3077

2757

3078

2758

client_class = Client

3079

2759

if use_dbus:

3080

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

3081

2760

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

2761

3082

2762

client_settings = Client.config_parser(client_config)

3083

2763

old_client_settings = {}

3084

2764

clients_data = {}

3085

2765

3086

2766

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

3087

2767

global wnull

3088

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

2768

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

3089

2769

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

3090

2770

# mode

3091

2771

if debug or not foreground:

3092

2772

wnull.close()

3093

2773

3094

2774

# Get client data and settings from last running state.

3095

2775

if server_settings["restore"]:

3096

2776

try:

3097

2777

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

3098

if sys.version_info.major == 2:

3099

clients_data, old_client_settings = pickle.load(

3100

stored_state)

3101

else:

3102

bytes_clients_data, bytes_old_client_settings = (

3103

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

3104

# Fix bytes to strings

3105

# clients_data

3106

# .keys()

3107

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

3108

if isinstance(key, bytes)

3109

else key): value

3110

for key, value in

3111

bytes_clients_data.items()}

3112

del bytes_clients_data

3113

for key in clients_data:

3114

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

3115

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

3116

for k, v in

3117

clients_data[key].items()}

3118

clients_data[key] = value

3119

# .client_structure

3120

value["client_structure"] = [

3121

(s.decode("utf-8")

3122

if isinstance(s, bytes)

3123

else s) for s in

3124

value["client_structure"]]

3125

# .name & .host

3126

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

3127

if isinstance(value[k], bytes):

3128

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

3129

# old_client_settings

3130

# .keys()

3131

old_client_settings = {

3132

(key.decode("utf-8")

3133

if isinstance(key, bytes)

3134

else key): value

3135

for key, value in

3136

bytes_old_client_settings.items()}

3137

del bytes_old_client_settings

3138

# .host

3139

for value in old_client_settings.values():

3140

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

3141

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

3142

.decode("utf-8"))

2778

clients_data, old_client_settings = pickle.load(

2779

stored_state)

3143

2780

os.remove(stored_state_path)

3144

2781

except IOError as e:

3145

2782

if e.errno == errno.ENOENT:

3153

2790

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

3154

2791

"EOFError:",

3155

2792

exc_info=e)

3156

2793

3157

2794

with PGPEngine() as pgp:

3158

2795

for client_name, client in clients_data.items():

3159

2796

# Skip removed clients

3160

2797

if client_name not in client_settings:

3161

2798

continue

3162

2799

3163

2800

# Decide which value to use after restoring saved state.

3164

2801

# We have three different values: Old config file,

3165

2802

# new config file, and saved state.

3176

2813

client[name] = value

3177

2814

except KeyError:

3178

2815

pass

3179

2816

3180

2817

# Clients who has passed its expire date can still be

3181

2818

# enabled if its last checker was successful. A Client

3182

2819

# whose checker succeeded before we stored its state is

3215

2852

client_name))

3216

2853

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

3217

2854

["secret"])

3218

2855

3219

2856

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

3220

2857

for client_name in (set(old_client_settings)

3221

2858

- set(client_settings)):

3223

2860

for client_name in (set(client_settings)

3224

2861

- set(old_client_settings)):

3225

2862

clients_data[client_name] = client_settings[client_name]

3226

2863

3227

2864

# Create all client objects

3228

2865

for client_name, client in clients_data.items():

3229

2866

tcp_server.clients[client_name] = client_class(

3230

name=client_name,

3231

settings=client,

3232

server_settings=server_settings)

3233

2867

name = client_name,

2868

settings = client,

2869

server_settings = server_settings)

2870

3234

2871

if not tcp_server.clients:

3235

2872

logger.warning("No clients defined")

3236

2873

3237

2874

if not foreground:

3238

2875

if pidfile is not None:

3239

2876

pid = os.getpid()

3245

2882

pidfilename, pid)

3246

2883

del pidfile

3247

2884

del pidfilename

3248

3249

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

3250

GLib.unix_signal_add(GLib.PRIORITY_HIGH, termsig,

3251

lambda: main_loop.quit() and False)

3252

2885

2886

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

2887

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

2888

3253

2889

if use_dbus:

3254

2890

3255

2891

@alternate_dbus_interfaces(

3256

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

2892

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

3257

2893

class MandosDBusService(DBusObjectWithObjectManager):

3258

2894

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

3259

2895

3260

2896

def __init__(self):

3261

2897

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

3262

2898

3263

2899

_interface = "se.recompile.Mandos"

3264

2900

3265

2901

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

3266

2902

def ClientAdded(self, objpath):

3267

2903

"D-Bus signal"

3268

2904

pass

3269

2905

3270

2906

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

3271

2907

def ClientNotFound(self, fingerprint, address):

3272

2908

"D-Bus signal"

3273

2909

pass

3274

2910

3275

2911

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

3276

2912

"true"})

3277

2913

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

3278

2914

def ClientRemoved(self, objpath, name):

3279

2915

"D-Bus signal"

3280

2916

pass

3281

2917

3282

2918

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

3283

2919

"true"})

3284

2920

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

3285

2921

def GetAllClients(self):

3286

2922

"D-Bus method"

3287

2923

return dbus.Array(c.dbus_object_path for c in

3288

tcp_server.clients.values())

3289

2924

tcp_server.clients.itervalues())

2925

3290

2926

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

3291

2927

"true"})

3292

2928

@dbus.service.method(_interface,

3294

2930

def GetAllClientsWithProperties(self):

3295

2931

"D-Bus method"

3296

2932

return dbus.Dictionary(

3297

{c.dbus_object_path: c.GetAll(

2933

{ c.dbus_object_path: c.GetAll(

3298

2934

"se.recompile.Mandos.Client")

3299

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

2935

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

3300

2936

signature="oa{sv}")

3301

2937

3302

2938

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

3303

2939

def RemoveClient(self, object_path):

3304

2940

"D-Bus method"

3305

for c in tcp_server.clients.values():

2941

for c in tcp_server.clients.itervalues():

3306

2942

if c.dbus_object_path == object_path:

3307

2943

del tcp_server.clients[c.name]

3308

2944

c.remove_from_connection()

3312

2948

self.client_removed_signal(c)

3313

2949

return

3314

2950

raise KeyError(object_path)

3315

2951

3316

2952

del _interface

3317

2953

3318

2954

@dbus.service.method(dbus.OBJECT_MANAGER_IFACE,

3319

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

2955

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

3320

2956

def GetManagedObjects(self):

3321

2957

"""D-Bus method"""

3322

2958

return dbus.Dictionary(

3323

{client.dbus_object_path:

3324

dbus.Dictionary(

3325

{interface: client.GetAll(interface)

3326

for interface in

3327

client._get_all_interface_names()})

3328

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

3329

2959

{ client.dbus_object_path:

2960

dbus.Dictionary(

2961

{ interface: client.GetAll(interface)

2962

for interface in

2963

client._get_all_interface_names()})

2964

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

2965

3330

2966

def client_added_signal(self, client):

3331

2967

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

3332

2968

if use_dbus:

3334

2970

self.InterfacesAdded(

3335

2971

client.dbus_object_path,

3336

2972

dbus.Dictionary(

3337

{interface: client.GetAll(interface)

3338

for interface in

3339

client._get_all_interface_names()}))

2973

{ interface: client.GetAll(interface)

2974

for interface in

2975

client._get_all_interface_names()}))

3340

2976

# Old signal

3341

2977

self.ClientAdded(client.dbus_object_path)

3342

2978

3343

2979

def client_removed_signal(self, client):

3344

2980

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

3345

2981

if use_dbus:

3350

2986

# Old signal

3351

2987

self.ClientRemoved(client.dbus_object_path,

3352

2988

client.name)

3353

2989

3354

2990

mandos_dbus_service = MandosDBusService()

3355

3356

# Save modules to variables to exempt the modules from being

3357

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

3358

mp = multiprocessing

3359

wn = wnull

3360

2991

3361

2992

def cleanup():

3362

2993

"Cleanup function; run on exit"

3363

2994

if zeroconf:

3364

2995

service.cleanup()

3365

3366

mp.active_children()

3367

wn.close()

2996

2997

multiprocessing.active_children()

2998

wnull.close()

3368

2999

if not (tcp_server.clients or client_settings):

3369

3000

return

3370

3001

3371

3002

# Store client before exiting. Secrets are encrypted with key

3372

3003

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

3373

3004

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

3374

3005

clients = {}

3375

3006

with PGPEngine() as pgp:

3376

for client in tcp_server.clients.values():

3007

for client in tcp_server.clients.itervalues():

3377

3008

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

3378

3009

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

3379

3010

key)

3380

3011

client_dict = {}

3381

3012

3382

3013

# A list of attributes that can not be pickled

3383

3014

# + secret.

3384

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

3385

"checker", "server_settings"}

3015

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

3016

"checker", "server_settings" }

3386

3017

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

3387

3018

.Object):

3388

3019

exclude.add(name)

3389

3020

3390

3021

client_dict["encrypted_secret"] = (client

3391

3022

.encrypted_secret)

3392

3023

for attr in client.client_structure:

3393

3024

if attr not in exclude:

3394

3025

client_dict[attr] = getattr(client, attr)

3395

3026

3396

3027

clients[client.name] = client_dict

3397

3028

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

3398

3029

3399

3030

try:

3400

3031

with tempfile.NamedTemporaryFile(

3401

3032

mode='wb',

3403

3034

prefix='clients-',

3404

3035

dir=os.path.dirname(stored_state_path),

3405

3036

delete=False) as stored_state:

3406

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

3407

protocol=2)

3037

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

3408

3038

tempname = stored_state.name

3409

3039

os.rename(tempname, stored_state_path)

3410

3040

except (IOError, OSError) as e:

3420

3050

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

3421

3051

exc_info=e)

3422

3052

raise

3423

3053

3424

3054

# Delete all clients, and settings from config

3425

3055

while tcp_server.clients:

3426

3056

name, client = tcp_server.clients.popitem()

3429

3059

# Don't signal the disabling

3430

3060

client.disable(quiet=True)

3431

3061

# Emit D-Bus signal for removal

3432

if use_dbus:

3433

mandos_dbus_service.client_removed_signal(client)

3062

mandos_dbus_service.client_removed_signal(client)

3434

3063

client_settings.clear()

3435

3064

3436

3065

atexit.register(cleanup)

3437

3438

for client in tcp_server.clients.values():

3066

3067

for client in tcp_server.clients.itervalues():

3439

3068

if use_dbus:

3440

3069

# Emit D-Bus signal for adding

3441

3070

mandos_dbus_service.client_added_signal(client)

3442

3071

# Need to initiate checking of clients

3443

3072

if client.enabled:

3444

3073

client.init_checker()

3445

3074

3446

3075

tcp_server.enable()

3447

3076

tcp_server.server_activate()

3448

3077

3449

3078

# Find out what port we got

3450

3079

if zeroconf:

3451

3080

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

3456

3085

else: # IPv4

3457

3086

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

3458

3087

*tcp_server.socket.getsockname())

3459

3460

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

3461

3088

3089

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

3090

3462

3091

try:

3463

3092

if zeroconf:

3464

3093

# From the Avahi example code

3469

3098

cleanup()

3470

3099

sys.exit(1)

3471

3100

# End of Avahi example code

3472

3473

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

3474

lambda *args, **kwargs:

3475

(tcp_server.handle_request

3476

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

3477

3101

3102

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

3103

lambda *args, **kwargs:

3104

(tcp_server.handle_request

3105

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

3106

3478

3107

logger.debug("Starting main loop")

3479

3108

main_loop.run()

3480

3109

except AvahiError as error: